CN111377363A - A hoisting device and hoisting method for civil aviation auxiliary power unit - Google Patents

Abstract

The invention discloses a hoisting device and a hoisting method for an auxiliary power device of civil aviation, and relates to the technical field of maintenance of auxiliary power devices of civil aviation. It comprises a fixed-column cantilever crane and a connecting mechanism. Steel cantilever and hoist, the upper end of the column is provided with a vertical fixed axis parallel to the column, the I-beam cantilever can freely rotate around the vertical fixed axis; the hoist is slidably connected to the bottom of the I-beam cantilever, lifting The hoist can slide along the I-beam cantilever under the action of tension; the connecting mechanism includes an integral forged lifting lug and a foldable fixing pin, and the lug of the integral forging lifting lug is fixed in the middle of the auxiliary power unit through the foldable fixing pin Fix the position of the hanging point; by implementing this technical solution, it can effectively ensure the safety, stability and no yaw when lifting the APU, effectively improve the lifting efficiency during the maintenance of the APU, and reduce the labor intensity of the lifting operation of the APU. Great practicality.

Description

A hoisting device and hoisting method for civil aviation auxiliary power unit

technical field

The invention relates to the technical field of maintenance of civil aviation auxiliary power devices, in particular to a lifting device and a lifting method of civil aviation auxiliary power devices used in maintenance workshops.

Background technique

Civil aircraft auxiliary power unit (English name Auxiliary Power Unit, APU for short) is a small centrifugal turbine engine installed at the tail of the aircraft. Its main function is to provide power and compressed air to the aircraft independently. Due to the compact structure of the civil aviation auxiliary power unit, the precision machining and the large weight of the APU, it needs to be lifted several times during the maintenance process in the workshop. There is a need for a quick and safe lifting device for aircraft auxiliary power units.

At present, the hoisting method used in the maintenance workshop uses the gantry crane as the hoisting tool. As shown in Figure 6, the beam type double hoisting wire rope spreader 7 inherent in the APU product is used as the connecting tool, and the driving mechanism 81 of the gantry crane 8 is used as the connecting tool. The hook at the end of the wire rope 82 is connected to the beam-type double-lifting wire rope spreader 7 for lifting; the above-mentioned lifting method is specifically for the operator to connect the beam-type double-lifting wire rope spreader with the two lifting points at the front and rear of the APU. This process It is necessary to tighten the eight bolts 9 symmetrically and ensure the same tightening force, and then connect the hook at the end of the gantry hanging wire rope to the beam-type double-hoisting wire rope spreader. The relative position of the lifting wire rope in the wire rope spreader makes the two and the center of gravity of the APU roughly on a vertical line, and then the lifting operation is carried out.

However, in the course of practice, the inventor of the present application found that the above-mentioned hoisting method has at least the following technical problems: the above-mentioned hoisting method requires the cooperation of at least two operators, which is inconvenient to operate; and the position of the center of gravity needs to be adjusted repeatedly, and the operation efficiency is low; more importantly, Due to the large error caused by the operator's visual adjustment of the position of the center of gravity, it cannot ensure that the center of gravity of the gantry hoisting wire rope, the sling wire rope and the APU are on a vertical line. Both the operator and the APU have great potential safety hazards, and at the same time increase the load of the hoisting equipment and reduce its service life. Therefore, in view of the above technical problems, it is of great significance for those skilled in the art to research and design another lifting scheme to solve the problem that the existing complex lifting operation method easily causes operator fatigue and increases the possibility of human error.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned technical problem that the existing APU hoisting method is complex and has a large potential safety hazard, the purpose of the present invention is to provide a hoisting device for an auxiliary power unit of civil aviation, the purpose of which is that the hoisting device can automatically lift off the ground before the APU is lifted off the ground. Align the center of gravity of the APU so that the center of gravity of the APU coincides with the vertical line of the hoisting wire rope during the lifting process, reducing the labor intensity that depends on repeated adjustment by the operator, and ensuring the safety, stability and no sway when lifting the APU, effectively improving the APU maintenance process. The hoisting efficiency is high, so as to ensure that the APU can be hoisted in place safely and securely. The structure is simple and has good practicability in practice.

The technical scheme adopted in the present invention is as follows:

A hoisting device for an auxiliary power unit of civil aviation, including a fixed-column cantilever crane and a connecting mechanism, the fixed-column cantilever crane includes a vertical column, an I-beam cantilever and a hoist, and the upper end of the vertical column is provided with a The vertical fixed axes of the vertical columns are parallel to each other, and the I-beam cantilever is sleeved on the vertical fixed axis and extends along the direction perpendicular to the vertical fixed axis, so that the I-beam cantilever can rotate in the horizontal direction around the vertical fixed axis; The lifting hoist is slidably connected to the bottom of the I-beam cantilever, and the bottom of the hoist is provided with a hoisting wire rope for connecting the auxiliary power device, so that the hoist can follow the I-beam cantilever under the action of tension. Self-sliding; the connecting mechanism includes an integral forged lifting lug and a foldable fixing pin, and the integral forged lifting lug includes a lifting ring part connected with the lifting steel cable and a support lug connected with the fixed hanging point in the middle of the auxiliary power unit so that the lug portion is fixed at the fixed hanging point position in the middle of the auxiliary power unit through the foldable fixing pin.

On the one hand, this technical solution abandons the use of the beam-type double-hoisting wire rope spreader recommended by the APU manufacturer for lifting, but redesigns the structure of one-piece forged lifting lugs and foldable fixing pins. The pin makes the position of the one-piece forged lifting lug and the fixed hanging point in the middle of the auxiliary power unit (hereinafter referred to as APU) relatively fixed, which reduces the degree of freedom of the entire lifting system, and simplifies the operation method of connecting the spreader to the APU, avoiding the traditional complex The shortcoming of the structural spreader indirectly transmits the force, so as to realize the smooth lifting, and make the connection structure more safe and reliable, simple and easy to operate. On the other hand, this technical solution abandons the use of gantry cranes as lifting equipment, but chooses fixed-column cantilever cranes, in which there is no driving device on the I-beam cantilever, but the APU is adjusted by itself by freely rotating around the vertical fixed axis on the column. The lateral relative position during the lifting process; the hoist runs in a straight line in the horizontal direction on the cantilever I-beam, and there is no driving device, and the longitudinal relative position of the APU during the lifting process is adjusted by itself by sliding along the I-beam cantilever under the action of tension. In this way, the center of gravity of the APU and the vertical line of the hoisting wire rope are overlapped, so as to ensure that the position of the center of gravity of the APU is determined without deflection during the lifting operation, and the APU can be lifted smoothly. The relative position of the heavy steel cable ensures the lifting effect, saves the labor cost, reduces the labor intensity of the APU lifting operation, and effectively improves the lifting efficiency during the maintenance of the APU, so as to ensure that the APU is hoisted in place safely and securely. Very good practicability and good promotion and use value.

Optionally, the lifting ring part and the supporting lug part of the integrally forged lifting lug are integrally processed by a forging piece, a hook is arranged at the end of the lifting wire, and a suspension adapted to the hook is arranged in the middle of the lifting ring part. In the suspending hole, a pin shaft hole for the foldable fixing pin to pass through is opened in the support lug, and the axial line of the suspending hole and the axial line of the pin shaft hole are parallel to each other. It is convenient for the lifting wire rope to adjust the relative positional relationship between the fixed hanging point in the middle of the APU and the center of gravity of the APU.

Optionally, there is a connecting transition portion between the lifting ring portion and the lug portion, the connecting transition portion has a rectangular frustum structure, the smaller end of the connecting transition portion is integrally connected with the lifting ring portion, and the larger end is connected to the lifting ring portion. The lugs are integrally connected.

Optionally, a deep groove is formed at the end of the lug portion to form a double-block fork structure, and pin shaft holes are formed on both side walls at the middle of the deep groove to form a hole for the foldable fixing pin to pass through. Connect vias.

Optionally, the width of the deep groove is adapted to the thickness of the fixing and hanging point in the middle of the auxiliary power unit, and the diameter of the foldable fixing pin is adapted to the hole diameter of the fixing and hanging point in the middle of the auxiliary power unit. In order to use the foldable fixing pin to connect the fixed hanging point in the middle of the APU with the one-piece forged hanging lug, the one-piece forged hanging lug and the fixed hanging point in the middle of the APU can be kept relatively stable and fixed, and the installation is fast and convenient. Won't slip.

Optionally, the foldable fixing pin includes a fixing pin body, a stop block arranged at one end of the fixing pin body, and a folding block arranged at the other end of the fixing pin body, wherein the diameter of the stop block is larger than that of all the fixing pins. The diameter of the fixed pin body. As a preference of this technical solution, the stopper can be connected to the end of the fixing pin body by welding or screw connection, so as to realize stable connection and prevent falling off.

Optionally, one end of the fixing pin body connected to the folding block has a connection sink, and the folding block is inserted into the connection sink and is connected by a hinge shaft, so that the folding block can go around the hinge shaft under the action of gravity. Turn to fold. Specifically, one end of the folding block connected to the fixing pin body is cut into a connecting portion that matches the connection sink structure, and a quasi "I"-shaped structure in a straight state with the fixing pin body is formed in the connecting sink groove of the folding block.

Optionally, the diameter of the folding block gradually decreases from the end close to the end connected with the fixing pin body to the free end thereof, so as to form the insertion end of the circular frustum structure. The connection and installation are realized in order to facilitate the introduction of the foldable fixing pin into the pin shaft hole of the support lug and the hanging hole of the fixed hanging point in the middle of the auxiliary power device.

Optionally, a first stop surface is formed on the end face of the connecting end of the fixing pin body and the folding block, and a second stop surface is formed on the folding block to match the first stop surface, and the first stop surface is formed on the folding block. A stop surface is provided with an inclined plane, and is used to limit the folding block to be folded only along one side of the fixing pin body.

Optionally, a third stop surface is formed on an end face of one end of the folding block inserted into the connection sink, and a fourth stop surface is formed at the bottom of the connection sink of the fixing pin body to match the third stop surface, The third stop surface is provided in an inclined plane, and the inclination direction of the third stop surface is opposite to that of the second stop surface. This structural design can not only effectively limit the folding direction of the folding block, but also make the folding block and The fixed pin body forms a stable fit connection when it is in a straight state of the pseudo "I" shape structure.

On the other hand, the present invention also provides a method for hoisting an auxiliary power unit for civil aviation, using the above-mentioned hoisting device for an auxiliary power unit for civil aviation, and the hoisting method includes the following steps:

S1, according to the hanging hole diameter of the fixed hanging point in the middle of the auxiliary power unit, the foldable fixed pin and the integral forged lifting lug are made;

S2, align the support lugs of the one-piece forged lifting lugs with the position of the fixed hanging point in the middle of the auxiliary power unit, so that the pin shaft holes of the support lugs are aligned with the hanging holes of the fixed hanging point in the middle of the auxiliary power unit;

S3, use a foldable fixing pin to insert the pin shaft hole of the support lug in the integrated forged lifting lug and the hanging hole of the fixed hanging point in the middle of the auxiliary power unit; relatively fixed;

S4, fold the foldable block at the end of the foldable fixing pin, so that the foldable fixing pin has a quasi-L-shaped structure;

S5, hook the hook configured on the hoisting wire rope at the bottom of the hoisting hoist on the lifting ring part of the one-piece forged lifting lug;

S6, the driving device in the hoist is used to roll the hoisting wire rope, and the I-beam cantilever and the hoisting hoist slide and adjust their positions by themselves under the action of tension, so that the center of gravity of the auxiliary power device and the suspension hoisting wire rope are at the same position. Lifting is carried out on a vertical line, so that the auxiliary power unit can take off and land smoothly without yaw.

Preferably, in step S2, the deviation between the vertical line where the position of the fixed hanging point in the middle of the auxiliary power device is located and the vertical line where the center of gravity of the auxiliary power device is located is less than 10mm, so that the auxiliary power device will not be deflected to a large extent during the lifting process; step The hoisting speed configured by the driving device in the hoisting hoist described in S6 is 0.8m/min-8m/min, so that the adjustment angle of the hoisting wire rope of the hoisting hoist is small enough for hoisting. It is known from the inventor's practice many times. , The lifting speed is configured to 0.8m/min for slow lifting, which can ensure that the APU can achieve stable, safe and efficient lifting after the I-beam cantilever and the lifting hoist slide and adjust the position under the action of tension, and have good lifting stability. sex.

As mentioned above, the present invention has at least the following beneficial effects compared to the prior art:

1. The hoisting device of the present invention can realize the reliable and convenient connection between the APU and the spreader when the civil aviation auxiliary power unit (APU) is frequently hoisted during the maintenance operation in the workshop, and the one-piece forged lifting lug can be made through the simple and easy-to-operate foldable fixing pin. It is relatively fixed with the fixed hanging point in the middle of the auxiliary power unit, which reduces the degree of freedom of the entire lifting system and avoids the disadvantage of indirect force transmission of traditional complex structure spreaders, so as to achieve smooth lifting and make the connection structure more secure and reliable.

2. After the hoisting operation of the present invention starts and before the APU is lifted off the ground, the I-beam cantilever and the hoist in the hoisting device can slide and adjust their positions by themselves under the action of pulling force, that is, the I-beam cantilever rotates and adjusts itself around the column. The horizontal relative position of the APU during the lifting process. The lifting hoist slides on the I-beam cantilever to adjust the longitudinal relative position of the APU during the lifting process, so as to realize the coincidence of the center of gravity of the APU and the vertical line of the lifting wire, and ensure the APU during the lifting operation. The position of the center of gravity is determined without deflection, so that the APU can be lifted smoothly.

3. The hoisting device of the present invention does not require the cooperation of two people, and the relative position of the hoisting wire rope in the aligning hoist can be visually checked to ensure the hoisting effect, save labor costs, and reduce the labor intensity of the APU hoisting operation, effectively improving the hoisting during the APU maintenance process. Efficiency to ensure that the APU is hoisted in place safely and securely, with a simple structure and good practicability in practice.

4. The hoisting method of the present invention is simple and easy to implement. The hoisting device automatically adjusts the relative position of the center of gravity of the APU, which avoids relying on the operator to repeatedly adjust the hoisting position, reduces the operator's labor intensity, and avoids the hoisting process caused by human factor errors. The deflection ensures that the APU is hoisted smoothly, safely and efficiently, and reduces the workload.

To sum up, the present invention cancels the use of the beam-type double-hoisting wire rope hanger recommended by the APU manufacturer for lifting, and redesigns the structure of an integral forged lifting lug and a foldable fixing pin, and uses the foldable fixing pin to conveniently The one-piece forged lifting lug is fixed at the fixed hanging point in the middle of the auxiliary power unit (APU). The fixed hanging point in the middle is close to the center of gravity of the APU, and the adjustment angle of the wire rope of the hoist is small enough, which can effectively solve the stability of the APU during the lifting process. The technical problem of instability; since the I-beam cantilever can rotate freely around the vertical fixed axis, the hoist can also slide along the I-beam cantilever under the action of tension, so there is no need for additional driving devices, and the hoist is equipped with Under the action of the driving device, the lifting wire rope can be automatically aligned with the center of gravity of the APU before the APU is lifted off the ground, so that the center of gravity of the APU coincides with the vertical line of the lifting wire rope during the lifting process. The way of thinking of improving the complex structure of lifting tools, with a simple and easy-to-implement structure improvement and lifting method, can effectively solve the technical problems of the existing APU lifting methods that are complex and have large safety hazards, which can save labor costs and reduce costs. It can ensure the safety, stability and no sway when lifting the APU, effectively improve the lifting efficiency during the maintenance of the APU, and then ensure that the APU is hoisted in place safely and stably, which has good practicability and promotion and use value.

Description of drawings

The invention will be described by way of specific embodiments with reference to the accompanying drawings, wherein

FIG. 1 is a schematic diagram of a working state of a hoisting device used in an auxiliary power unit for civil aviation according to an exemplary embodiment of the present invention;

Figure 2 is a schematic diagram of an integrally forged lifting lug in an exemplary embodiment of the present invention;

FIG. 3 is a schematic diagram of another perspective view of the integrally forged lifting lug in FIG. 2 according to the exemplary embodiment of the present invention;

4 is a schematic diagram of a foldable fixing pin in an exemplary embodiment of the present invention;

FIG. 5 is a schematic diagram of another viewing angle of the foldable fixing pin in FIG. 4 according to the exemplary embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a hoisting device in the background art of the present invention.

Description of reference numerals: 1-upright column; 11-vertical fixed shaft; 2-I-beam cantilever; 3-hoisting hoist; 31-hoisting wire rope; 32-hook; 4-integrated forging lifting lug; 41- 42-suspension hole; 43-support lug; 44-pin hole; 45-connection transition part; 46-deep groove; 5-foldable fixing pin; 51-fixing pin body; 52-stop block ;53-folding block;54-connecting sink;55-hinge shaft;56-first stop surface;57-second stop surface;58-third stop surface;59-fourth stop surface;6 -Auxiliary power unit; 7- Beam type double lifting wire rope spreader; 8- Gantry crane; 81- Sling; 9- Bolt.

Detailed ways

All features disclosed in this specification, or all disclosed steps in a method or process, may be combined in any way except mutually exclusive features and/or steps.

Any feature disclosed in this specification (including any accompanying claims, abstract), unless expressly stated otherwise, may be replaced by other equivalent or alternative features serving a similar purpose. That is, unless expressly stated otherwise, each feature is but one example of a series of equivalent or similar features.

The embodiment is basically as shown in FIG. 1 : this embodiment provides a lifting device for an auxiliary power unit of civil aviation, which includes a fixed-column cantilever crane and a connecting mechanism. Specifically, the fixed-column cantilever crane includes a vertical column 1, The I-beam cantilever 2 and the lifting hoist 3, the column 1 is firmly installed on the ground, and the vertical fixed shaft 11 parallel to the column 1 is installed on the upper end of the column 1 through the fixed bracket, and the I-beam cantilever 2 is set at the The lower part of the vertical fixed axis 11 extends to the right perpendicular to the vertical fixed axis 11, so that the I-beam cantilever 2 can rotate freely in the horizontal direction around the vertical fixed axis 11, in order to ensure the installation of the I-beam cantilever 2 For stability, a pull rope connecting the right end of the I-beam cantilever 2 is installed on the upper part of the vertical fixed shaft 11, so that the pull rope, the vertical fixed shaft 11 and the I-beam cantilever 2 form a triangular stable support structure. Further, the lifting hoist 3 is slidably connected to the bottom of the I-beam cantilever 2, so that the lifting hoist 3 can slide along the I-beam cantilever 2 under the action of tension, and the bottom of the lifting hoist 3 is provided with a connection for connecting The hoisting wire rope 31 of the auxiliary power unit 6 is provided with a hook 32 at the end of the hoisting wire rope 31, and the hook 32 is used to connect with the connecting mechanism installed at the fixed hanging point position in the middle of the auxiliary power unit 6, using a fixed column type The cantilever crane is used as a lifting device to realize the lifting with the connecting mechanism.

The connecting mechanism provided in this embodiment includes an integral forged lifting lug 4 and a foldable fixing pin 5 . As shown in FIGS. 2 and 3 , the integrally forged lifting lug 4 provided in this embodiment includes a connection with a lifting wire 31 The lifting ring part 41 and the lug part 43 connected with the fixed hanging point in the middle of the auxiliary power unit 6 are connected to the fixed hanging point position in the middle of the auxiliary power unit 6 through the foldable fixing pin 5; The hoisting ring portion 41 and the supporting lug portion 43 of the hoisting lug 4 are integrally processed by forgings and have good structural strength. The middle of the hoisting ring portion 41 is provided with a suspending hole 42 adapted to the hook 32 for connecting the hoisting wire rope. The hook 32 of 31 has a pin hole 44 in the lug portion 43 for the foldable fixing pin 5 to pass through. The axial line of the suspension hole 42 and the axial line of the pin hole 44 are parallel to each other, which is convenient for lifting steel. The cable 31 adaptively adjusts the relative positional relationship between the fixed hanging point in the middle of the APU and the center of gravity of the APU.

Specifically, there is a connecting transition portion 45 between the lifting ring portion 41 and the lug portion 43, the connecting transition portion 45 has a rectangular frustum structure, and the upper end of the connecting transition portion 45 with a smaller size is integrally connected with the lifting ring portion 41, and its size is relatively small. The large lower end is integrally connected with the lug portion 43, which ensures that the one-piece forged lifting lug 4 has better structural strength, and at the same time has a lighter weight and effectively improves the tensile strength; A deep groove 46 is formed at the end of the lug portion 43 to form a double-block fork structure, and pin holes 44 are formed on both side walls in the middle of the deep groove 46 to form a connection for the foldable fixing pin 5 to pass through. Through holes, and the width of the deep groove 46 is adapted to the thickness of the fixed hanging point in the middle of the auxiliary power unit 6, the diameter of the foldable fixing pin 5 is adapted to the hole diameter of the fixed hanging point in the middle of the auxiliary power unit 6, and the support The hole diameter of the pin shaft hole 44 opened on the ear portion 43 is adapted to the hole diameter of the fixed hanging point hanging hole in the middle of the APU, so that after using the foldable fixing pin 5 to connect the fixed hanging point in the middle of the APU with the one-piece forged lifting lug 4, The one-piece forged lifting lug 4 and the fixed hanging point in the middle of the APU can be kept relatively stable and fixed, and the installation is fast and convenient, and it can ensure that the APU will not slip off during the lifting process; thus, the hook 32 of the hoist 3 of the fixed-column cantilever crane is hung. On the one-piece forged lifting lug 4, the lifting operation is carried out by a driving device such as a hoisting hoist motor. Through the self-position adjustment of the I-beam cantilever 2 and the hoisting hoist 3 under the action of tension, the center of gravity of the APU and the hoisting wire rope 31 are finally adjusted. The vertical lines are coincident to avoid the APU yaw during the lifting process.

As shown in FIGS. 4 and 5 , the foldable fixing pin 5 provided in this embodiment includes a fixing pin body 51 , a stopper block 52 arranged at one end of the fixing pin body 51 , and a stopper 52 arranged at the other end of the fixing pin body 51 . Folding block 53, the diameter of the stop block 52 is larger than the diameter of the fixed pin body 51; as a preferred embodiment of this embodiment, the stop block 52 can be connected to the end of the fixed pin body 51 by welding or screw connection to achieve stable connection , to prevent falling off; and the folding block 53 can be rotated and folded along the axial side perpendicular to the fixing pin body 51 by fixing the folding block 53 with the hinge shaft 55, which is not limited to this, of course, it can also be The purpose of the folding method in the prior art is to use the elastic structure to turn over, and its purpose is to facilitate the insertion of the foldable fixing pin 5 into the fixing hanging point hanging hole in the middle of the APU and the pin shaft hole 44 of the integrally forged lifting lug 4, which is convenient for quick connection and installation, and at the same time. It can also prevent the APU from slipping off during the lifting process.

As a preferred solution of this embodiment, this embodiment has a connection sink 54 at one end of the fixing pin body 51 connected to the folding block 53, so that the folding block 53 is inserted into the connection sink 54 and connected by the hinge shaft 55, so that the folding The block 53 can be rotated and folded around the hinge shaft 55; specifically, one end of the folding block 53 connected to the fixing pin body 51 is cut into a connecting portion that is adapted to the structure of the connecting sink 54, so that the connecting portion of the folding block 53 is inserted into the connecting sink. After entering the groove 54, it can cooperate with the fixing pin body 51 to form a quasi-"I"-shaped structure in a straight state. Since the gravity of the end of the folding block 53 is greater than the gravity of the cutting connection end, after the foldable fixing pin 5 is connected and installed, the folding The block 53 sags freely due to gravity to realize rotation and folding. The folded foldable fixing pin 5 is in a pseudo "L" shape structure. Such foldable fixing pin 5 is convenient and quick to use, and the lifting lug will not slip off during the lifting process.

Further, a first stop surface 56 is formed on the end face of the connecting end of the fixing pin body 51 and the folding block 53 , and the folding block 53 is formed with a second stop surface 57 matched with the first stop surface 56 . The position surface 56 is inclined and is used to limit the folding block 53 to only be folded along one side of the fixing pin body 51; A fourth stop surface 59 is formed at the bottom of the connection sink 54 to match with the third stop surface 58 . The inclination of 57 is opposite. This structural design can not only effectively limit the folding direction of the folding block 53, but also enable the folding block 53 and the fixing pin body 51 to form a stable fit connection when the quasi "I"-shaped structure in a straight state is formed. It can only be folded downward under the action of gravity and will not be folded upward; the diameter of the folding block 53 gradually decreases from the end connected with the fixing pin body 51 to its free end, thereby forming the insertion end of the circular truncated structure, so as to facilitate the foldable fixing The pin 5 is introduced into the pin shaft hole 44 of the lug portion 43 and the hanging hole of the fixing hanging point in the middle of the auxiliary power unit 6 to realize connection and installation.

From the above, the hoisting device of this embodiment abandons the use of the beam-type double hoisting wire rope 31 hoisting device recommended by the APU manufacturer for hoisting, but uses the simple and easy-to-operate foldable fixing pin 5 to make the one-piece forged lifting lug 44. It is relatively fixed with the fixed hanging point in the middle of the auxiliary power unit 6 (hereinafter referred to as APU), which reduces the degree of freedom of the entire lifting system, simplifies the operation method of connecting the spreader to the APU, and avoids the indirect transmission effect of the traditional complex structure spreader. In order to achieve stable lifting and make the connection structure more safe and reliable, simple and easy to operate; at the same time, the lifting device in this embodiment abandons the use of gantry cranes as lifting equipment, but chooses fixed-column cantilever cranes, in which I-beam cantilevers are used. There is no driving device on the 2, but the horizontal relative position of the APU during the lifting process of the APU can be adjusted by free rotation around the vertical fixed axis 11 on the column 1; By sliding along the I-beam cantilever 2 under the action of tension, the longitudinal relative position of the APU can be adjusted by itself during the lifting process, so that the center of gravity of the APU and the vertical line of the hoisting cable 31 are overlapped, thereby ensuring the center of gravity of the APU during the lifting operation. The position is determined without deflection, and the APU can be hoisted smoothly. The above hoisting device does not require the cooperation of two people, and the relative position of the hoisting wire 31 in the aligning hoist can be checked visually to ensure the hoisting effect, save labor costs, and reduce the labor of lifting the APU. Strength, effectively improve the lifting efficiency in the APU maintenance process, to ensure that the APU is safely and securely hoisted in place, the structure design is simple, the fixed installation is convenient, suitable for this application scenario, and has good practicability.

On the other hand, FIG. 1 shows a schematic diagram of the working state of an exemplary hoisting device for civil aviation auxiliary power units of the present invention. According to the present invention, this embodiment also provides a hoisting method for civil aviation auxiliary power units, using the method shown in FIG. 1 . A hoisting device is shown, and the hoisting method includes the following steps:

S1, according to the hanging hole diameter of the fixed hanging point in the middle of the auxiliary power unit 6, the foldable fixing pin 5 and the integrally forged lifting lug 44 are produced;

S2, align the lug portion 43 of the one-piece forged lifting lug 4 with the fixed hanging point position in the middle of the auxiliary power unit 6, so that the pin hole 44 of the lug portion 43 is aligned with the hanging hole of the fixed hanging point in the middle of the auxiliary power unit 6;

S3, use the foldable fixing pin 5 to insert the pin hole 44 of the lug portion 43 of the integral forged lifting lug 4 and the hanging hole of the fixed hanging point in the middle of the auxiliary power unit 6; so that the integral forged lifting lug 4 and the auxiliary power The fixed hanging point in the middle of the device 6 remains relatively fixed;

S4, the folding block 53 at the end of the foldable fixing pin 5 is free to sag and fold due to the action of gravity, so that the foldable fixing pin 5 has a quasi-L-shaped structure;

S5, hooking the hook 32 configured on the hoisting wire rope 31 at the bottom of the hoist 3 to the hoisting ring portion 41 of the integrally forged hoisting lug 44;

S6, the hoisting wire rope 31 is rolled by the driving device configured in the hoisting hoist 3, and the I-beam cantilever 2 and the hoisting hoist 3 slide and adjust their positions by themselves under the action of pulling force, so that the center of gravity of the auxiliary power device 6 and the suspension are pulled up. The heavy steel cables 31 are hoisted on the same vertical line, so that the auxiliary power unit 6 can take off and land smoothly without yaw.

In the above hoisting method of the present embodiment, the deviation between the vertical line where the position of the fixed hanging point in the middle of the auxiliary power device 6 and the vertical line where the center of gravity of the auxiliary power device 6 is located in step S2 is less than 10 mm, so that the auxiliary power device 6 will not be hoisted during the lifting process. A relatively large deflection occurs; as preferred in this embodiment, the lifting speed configured by the driving device in the hoist 3 in step S6 is 0.8m/min-8m/min, so that the hoist of the hoist 3 is lifted. The adjustment angle of the steel cable 31 is small enough for lifting. The inventors have found that the lifting speed is configured to 0.8m/min for slow lifting, which can ensure that the APU can be lifted under the tension of the I-beam cantilever 2 and the hoist 3. After sliding and adjusting the position, it can achieve stable lifting.

To sum up, the lifting method of this embodiment can realize the reliable and convenient connection between the APU and the spreader when the Civil Aviation Auxiliary Power Unit (APU) is frequently carried out in the workshop-level maintenance operation, which is simple and easy to operate, and at the same time, the lifting device automatically adjusts the connection with the spreader. The relative position of the center of gravity of the APU avoids relying on the operator to repeatedly adjust the lifting position, reduces the operator's labor intensity, and avoids the deviation of the lifting process caused by human error, ensuring the APU lifting is stable, safe and efficient, and reduces the workload. It has a good promotion and use value, and is suitable for the promotion and use of civil aviation auxiliary power units (APU) in the process of workshop-level maintenance operations.

The present invention is not limited to the foregoing specific embodiments. The present invention extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims (10)

1. a hoisting device for civil aviation auxiliary power unit is characterized in that: comprise fixed column type cantilever crane and connecting mechanism, and described fixed column type cantilever crane comprises upright column, I-beam cantilever and hoist, described The upper end of the vertical column is provided with a vertical fixed axis parallel to the vertical column, and the I-beam cantilever is sleeved on the vertical fixed axis and extends along the direction perpendicular to the vertical fixed axis, so that the I-beam cantilever can go around the vertical axis. The fixed axis rotates in the horizontal direction; the hoist is slidably connected to the bottom of the I-beam cantilever, and a hoisting wire rope for connecting the auxiliary power device is arranged at the bottom of the hoist, so that the hoist can be Under the action, it slides along the I-beam cantilever; the connecting mechanism includes an integrated forged lifting lug and a foldable fixing pin, and the integrated forged lifting lug includes a lifting ring part connected with the lifting steel cable and a middle part with the auxiliary power device. Fix the support lugs connected to the hanging points, so that the support lugs are fixed at the middle of the auxiliary power unit through the foldable fixing pins at the fixed hanging point position. 2 . The lifting device for civil aviation auxiliary power unit according to claim 1 , wherein the lifting ring portion and the lug portion of the integrally forged lifting lug are integrally processed by forgings, and the lifting wire rope A hook is arranged at the end of the hoist ring, a suspension hole adapted to the hook is arranged in the middle of the hoisting ring, and a pin hole for the foldable fixing pin to pass through is opened in the lug portion, and the axial line of the suspension hole is the same as The axial lines of the pin shaft holes are parallel to each other. 3 . The lifting device for civil aviation auxiliary power units according to claim 2 , wherein a connecting transition portion is provided between the hoisting ring portion and the lug portion, and the connecting transition portion has a rectangular truncated cone structure. 4 . 4. The hoisting device for civil aviation auxiliary power unit according to claim 2, characterized in that: the end of the lug is provided with a deep groove to form a double-block fork structure, on both sides of the middle position of the deep groove The walls are all provided with pin shaft holes to form connecting through holes for the foldable fixing pins to pass through. 5 . The lifting device for civil aviation auxiliary power unit according to claim 4 , wherein the width of the deep groove is adapted to the thickness of the fixed hanging point in the middle of the auxiliary power unit, and the foldable fixing pin has a thickness. 6 . The diameter is adapted to the hole diameter of the fixed hanging point hanging hole in the middle of the auxiliary power unit. 6 . The lifting device for civil aviation auxiliary power unit according to claim 1 , wherein the foldable fixing pin comprises a fixing pin body, a stopper provided at one end of the fixing pin body, and a stopper provided at one end of the fixing pin body. 7 . The folded block at the other end of the pin body, the diameter of the stop block is larger than the diameter of the fixed pin body. 7 . The hoisting device for civil aviation auxiliary power unit according to claim 6 , wherein the end of the fixing pin body connected with the folding block has a connecting sink, and the folding block is inserted into the connecting sink. 8 . The grooves are connected by a hinge shaft, so that the folding block can be rotated and folded around the hinge shaft under the action of gravity. 8 . The lifting device for civil aviation auxiliary power unit according to claim 7 , wherein the diameter of the folding block gradually decreases from the end connected with the fixing pin body to the free end thereof, so as to form a circular truncated structure. 9 . the insertion end. 9. A lifting method for an auxiliary power unit for civil aviation, characterized in that: using the lifting device for an auxiliary power unit for civil aviation according to any one of claims 1-8, the lifting method comprises the following steps: S1, according to the hanging hole diameter of the fixed hanging point in the middle of the auxiliary power unit, the foldable fixed pin and the integral forged lifting lug are made; S2, align the support lugs of the one-piece forged lifting lugs with the position of the fixed hanging point in the middle of the auxiliary power unit, so that the pin shaft holes of the support lugs are aligned with the hanging holes of the fixed hanging point in the middle of the auxiliary power unit; S3, use a foldable fixing pin to insert the pin shaft hole of the support lug in the integrated forged lifting lug and the hanging hole of the fixed hanging point in the middle of the auxiliary power unit; relatively fixed; S4, fold the foldable block at the end of the foldable fixing pin, so that the foldable fixing pin has a quasi-L-shaped structure; S5, hook the hook configured on the hoisting wire rope at the bottom of the hoisting hoist on the lifting ring part of the one-piece forged lifting lug; S6, the driving device in the hoist is used to roll the hoisting wire rope, and the I-beam cantilever and the hoisting hoist slide and adjust their positions by themselves under the action of tension, so that the center of gravity of the auxiliary power device and the suspension hoisting wire rope are at the same position. Lifting is carried out on a vertical line, so that the auxiliary power unit can take off and land smoothly without yaw. 10. The lifting method of civil aviation auxiliary power unit according to claim 9, is characterized in that: in step S2, the vertical line where the position of the fixed hanging point in the middle of the auxiliary power unit is located and the vertical line where the center of gravity of the auxiliary power unit is located is less than 10mm; step The hoisting speed configured by the drive device in the hoist described in S6 is 0.8m/min-8m/min.

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