CN101995323B - Simulation device for air airflow tripping force experiments of arm - Google Patents

Abstract

The invention discloses a simulation device for air airflow tripping force experiments of an arm, which comprises an integral framework, a wire winding mechanism, a traction mechanism and a switch mechanism, wherein the wire winding mechanism, the traction mechanism and the switch mechanism are connected with a spring through a steel wire rope, the traction mechanism is also connected with an arm protection sleeve through the steel wire rope, and the steel wire rope is tensioned through the wire winding of the wire winding mechanism so as to deform the spring, the steel wire rope connected with the switch mechanism can be separated from the switch mechanism through switching on the switch mechanism so that potential energy stored when the spring deforms can be converted into kinetic energy of the traction mechanism. The traction mechanism slides on the integral framework, and drives the steel wire rope arranged on the arm protection sleeve to pull away the hand for reaching the goal of completing the experiments. The simulation device is convenient to operation, has low cost, conforms to the real ejection condition and can obtain accurate data, and the obtained mechanical data can provide the theoretical foundation for the study of the arm protection measure while the aircrew escape of pilots.

Description

A Simulator for Arm Airflow Release Force Experiment

technical field

The invention belongs to the technical field of biomechanics, and relates to a biomechanical experiment simulation device, specifically, a device for simulating the airflow release force of the pilot's arm during ejection rescue, which is suitable for releasing the airflow in the hand of the pilot during ejection rescue force research.

Background technique

During the high-speed flight of modern fighter jets, in case of danger, the pilot needs to eject to save his life. In order to make the ejection life-saving system small in mass and good in stability, the existing ejection life-saving system mostly adopts an open ejection life-saving seat. Very serious injuries were caused to the chest, abdomen and limbs. Due to the large range of motion of the upper limbs and the difficulty of fixing them, it accounts for the vast majority of airflow impact injuries. During the ejection, when the hand cannot hold the ejection handle (central ring) and is blown off by the high-speed airflow, the upper limbs will produce a swinging movement relative to the trunk. The violent swinging may cause the joints of the upper limbs to exceed the range of motion and cause dislocation. The joint capsule is torn, so the research on protective equipment has become a major issue to be solved urgently. Although some protective measures have been proposed at home and abroad, there are still reports of upper limb injuries.

There is currently no foreign corresponding standard for the tolerance limit of the human body to high-speed air blowing, and there are few studies by relevant domestic units. my country's new high-speed ejection rescue speed reaches 1100-1200km/h. At this time, if the pilot's upper limbs are not protected, the high-speed airflow blows the injury rate to 100%. With the improvement of the ejection speed and life-saving performance of my country's new J-plane, the existing research level and standards can neither meet nor meet the needs of the development of my country's aviation life-saving level, especially the needs of the existing life-saving level of the new J-plane . Therefore, it is an important research content in aviation ejection rescue to study the physiological tolerance of high-speed airflow blowing and the corresponding protective measures.

Contents of the invention

Since the injury of the pilot's upper limbs is caused by the separation of the hands from the ejection handle, the airflow acts on the arm to generate arm airflow release force, which makes the hand disengage from the ejection handle. The simplest and most direct way to study the airflow release force of the arm (arm tensile force) is to develop a suitable mechanical simulation device. The mechanical data measured by the simulation device provide a theoretical basis for the study of the pilot's arm protection measures during ejection. Therefore the present invention provides a kind of simulation device that can generate the momentary force that the pilot receives at the moment of ejecting from the plane, can accurately measure the ultimate tensile strength of the pilot's arm, and can ensure the personal safety of the testee, and the cost is low and practical. High performance, small size, easy to operate.

The invention is a simulation device used for the airflow release force experiment of the pilot's arm during ejection, which comprises a whole frame, a wire winding mechanism, a traction mechanism and a switch mechanism.

The overall frame includes a base, two front support rods, two rear support rods, a pedestal, a crossbeam A and a crossbeam B; wherein, the base is two parallel horizontal crossbars, and the front support rods are vertically connected to the two crossbars respectively. and the rear support bar; the pedestal is a rectangular frame, and the four sides of the rectangular frame are connected with the two front support bars and the two rear support bars respectively, and a pulley C is installed at the center of the front edge between the two front support bars, and the two rear support bars A pulley B is installed at the center of the back between the support rods, and the remaining two relative left and right sides are slidingly connected with a traction mechanism, and stoppers are respectively installed on the left and right sides to limit the traction mechanism The moving distance; the front edge of the pedestal between the two front support rods is also equipped with a switch mechanism; a crossbeam A is connected between the two front support rods below the plane where the pedestal is located; symmetrically arranged on the two rear support rods above the plane where the pedestal is located A through hole is used to install the beam B; a pulley A is installed in the middle of the beam A, and a pulley D is installed in the middle of the beam B, and the pulley A, the pulley B, the pulley C, and the pulley D are located in the same vertical plane ;

Both ends of the base behind the two rear support rods are connected with a winding mechanism support seat, and a winding mechanism support is connected to the winding mechanism support seat; a winding mechanism is connected between the two rear support rods below the plane where the pedestal is located The supporting beam, the height of the winding mechanism support beam is the same as the top height of the winding mechanism support, and the winding mechanism installation platform is fixedly connected horizontally on the top of the winding mechanism support beam and the winding mechanism support, A winding mechanism is installed on the winding mechanism installation platform;

The winding mechanism is mainly composed of a winding reel housing, a large gear, a pinion, a winding shaft, a caliper and a handle; wherein, the winding shaft is located inside the winding reel housing, and is positioned between the side wall of the winding reel housing. For rotational connection, the large gear is fixedly connected to the winding shaft, the pinion is fixedly connected to the connecting shaft inside the winding reel housing, and the pinion gear meshes with the large gear, and one end of the connecting shaft extends out of the winding reel housing The outside is connected to the handle; one end of the caliper is rotatably connected to the inner wall of the winding reel housing, and the other end is a free end, and the free end is located at the pinion gear teeth; The limit pin, the lower edge of the caliper is a convex arc surface, and the upper edge is a straight surface; a wire rope A is tied to the winding shaft in the winding mechanism, and the wire rope A is connected to one end of the spring, and the other end of the spring is connected to the wire rope B. After B bypasses pulley A and pulley B, it is connected to the traction mechanism; one end of steel wire rope C is connected to the traction mechanism, and the other end is connected to the switch mechanism; Go around the pulley D and connect with the arm guard.

When carrying out the lateral tensile test of the pilot's arm, by turning the handle in the winding mechanism, the small gear rotates clockwise, which drives the large gear to rotate, so that the winding shaft starts winding. At this time, steel wire rope A, steel wire rope B, steel wire rope C, steel wire rope D and the spring starts to tighten. In the process of tensioning, the spring is constantly elongated and deformed, and when the spring reaches the predetermined deformation, the winding is stopped.

The wire rope C is separated from the short side of the wrench A through the switch mechanism, so that the potential energy stored when the spring is tensioned is quickly converted into the kinetic energy of the traction mechanism, and the traction mechanism leaves the initial position and moves quickly between the long sides of the pedestal, and at the same time, the kinetic energy passes through the wire rope D Pass it to the armband, so as to apply lateral pull to the arm, and complete the simulation of the pilot's release force during ejection.

The advantages of the present invention are:

1. The simulation device of the present invention can ensure the personal safety of the testee while accurately measuring the ultimate tensile capacity of the pilot's arm; the designed arm guard can also simulate the uniform force received by the pilot's forearm;

2. The design of the simulation device of the present invention considers the variability of the direction of the airflow blowing force received by the pilot during the actual ejection, and the direction of the force on the human body is designed to be variable, which is more in line with the actual ejection situation, and more accurate mechanical data can be obtained ;

3. The simulation device of the present invention is low in cost, high in practicability, small in size and easy to operate.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the simulation device of the present invention;

Fig. 2 is a schematic diagram of the overall frame structure in the simulation device of the present invention;

Fig. 3 schematic diagram of winding mechanism in the simulation device of the present invention;

Fig. 4 is a schematic diagram of the structure of the traction body in the simulation device of the present invention;

Fig. 5 is a structural schematic diagram of the switch mechanism in the simulation device of the present invention;

Fig. 6 is a sectional view of the switch mechanism in the simulation device of the present invention;

Fig. 7 is a schematic diagram of the connection with the arm guard when the simulation device of the present invention simulates the pilot's arm resistance to the airflow release force experiment;

Fig. 8 is a schematic diagram of the connection between the wire rope E and the arm guard when the simulation device of the present invention simulates the pilot's arm resisting the airflow release force experiment.

In the picture:

1-Overall frame 2-Winding mechanism 3-Traction mechanism 4-Switch mechanism

5-base 6-front support rod 7-rear support rod 8-pedestal

9-beam A 10-beam B 11-pulley A 12-pulley B

13-Pulley C 14-Pulley D 15-Through hole 16-Winding mechanism support seat

17-Winding mechanism bracket 18-Winding mechanism support beam 19-Winding mechanism installation table 201-Winding disc shell

202-winding shaft 203-big gear 204-pinion 205-caliper

206-handle 207-limit pin 301-rear baffle 302-front baffle

303-connecting plate 304-slider 305-roller 306-round hole A

307-round hole B 401-upper cover 402-lower cover 403-wrench A

404-Wrench B 405-"U" groove 406-Limit block 20-Wire rope A

21-Wire Rope B 22-Wire Rope C 23-Wire Rope D 24-Wire Rope E

25-block 26-arm guard 27-connection hole 28-spring

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

The present invention is a simulation device for arm airflow release force experiment when the pilot is ejected for lifesaving, as shown in FIG.

Wherein, the overall frame 1 includes a base 5, two front support rods 6, two rear support rods 7, a pedestal 8, a beam A9, and a beam B10, as shown in FIG. 2 . Wherein, two parallel cross bars are fixed to the ground as the base 5 of the overall frame 1, and two front support bars 6 and two rear support bars 7 are vertically and symmetrically connected respectively on the two parallel bars, and the height of the rear support bars 7 is Twice the height of the front support rod 6. The pedestal 8 is a rectangular frame, the four sides of the pedestal 8 are respectively connected with the two front support bars 6 and the two rear support bars 7, and the plane where the pedestal 8 is located is parallel to the plane where the base 5 is located. A beam A9 is connected between the two front support rods 6 below the plane where the pedestal 8 is located. Through holes 15 are symmetrically arranged on the two rear support rods 7 above the plane where the pedestal 8 is located, and are used to install the beam B10. In this embodiment, five through holes 15 are respectively opened in different planes on the upper parts of the two rear support rods 7, so as to pass Install the crossbeam B10 on the through holes 15 on different planes to adjust the height of the crossbeam B10. Pulley A11 is installed in the middle part of crossbeam A9, and pulley D14 is installed in crossbeam B10 middle part, and pulley C13 is installed in the center of front edge between two front support rods 6 in pedestal 8, between two rear support rods 7 Pulley B12 is installed in the center of the back; Described pulley A11, pulley B12 and pulley C13 and pulley D14 are located in the same vertical plane.

On the base 5 at the rear of the two rear support rods 7, a winding mechanism support seat 16 is connected, and a winding mechanism support seat 16 is vertically connected with a winding mechanism support 17. A winding mechanism support beam 18 is connected between the two rear support rods 7 below the plane where the pedestal 8 is located. The height of the winding mechanism support beam 18 is the same as the top height of the winding mechanism support 17, and the winding mechanism installation platform is fixedly connected horizontally on the top of the winding mechanism support beam 18 and the winding mechanism support 17 19. A winding mechanism 2 is installed on the winding mechanism installation platform 19; as shown in FIG. 1 , a traction mechanism 3 is slidably connected between the two long sides of the pedestal 8, so that the traction mechanism 3 has a sufficient sliding distance. Switch mechanism 4 is installed on the short side that is connected with two front support rods 6 in pedestal 8 . The base 5, the front support rod 6, the rear support rod 7, the pedestal 8, the crossbeam A9, the crossbeam B10, the winding mechanism support seat 16, the winding mechanism support beam 18, and the winding mechanism support frame 17 are angle steel structures.

The winding mechanism 2 includes a winding reel housing 201 , a winding shaft 202 , a large gear 203 , a small gear 204 , a caliper 205 and a handle 206 , as shown in FIG. 3 . Wherein, the bobbin 202 is located inside the bobbin housing 201, and is rotationally connected with the sidewall of the bobbin casing 201, and is fixedly connected to the bobbin 202 between the sidewalls of the bobbin casing 201 The gear 203 and the pinion 204 are connected to one side of the winding reel housing 201 through a connecting shaft, and the pinion 204 meshes with the large gear 203, and a handle 206 is connected to one end of the connecting shaft, and the handle 206 is located outside the winding reel housing 201 , drive the small gear 204 to rotate by turning the handle, thereby driving the winding shaft 202 to rotate with the large gear 203, so that the winding shaft starts to wind. One end of the caliper 205 is rotatably connected to the inner wall of the winding reel housing 201, the other end is a free end, and the free end is located at the teeth of the pinion 204; limit pins are respectively arranged on the inner walls of the winding reel housing 201 above and below the caliper 201 207 , thereby limiting the up and down movement of the caliper 205 , thereby limiting the pinion 204 . By shaking the reel handle 206, the pinion gear 204 starts to rotate, which drives the large gear 203 to rotate, and the reel starts to wind. Therefore, the lower edge of the caliper 205 is a convex arc surface, so that the pinion gear 204 will not be rotated by the caliper. 205 stuck and stopped rotating. When the winding reel handle 206 is stopped, in order to prevent the pinion 204 from reversing, the upper edge of the caliper 205 is designed as a straight surface; thus, the caliper 205 is blocked by the limit function of the limit pin 207 on the top of the caliper 205, and at the same time The caliper 205 clamps the pinion 204 to stop the pinion 204 from rotating. The caliper 205 , the pinion gear 204 and the large gear 203 are located on the same side of the winding reel housing 201 .

The traction mechanism 3 includes a traction body and a slider 304, as shown in FIG. 4 . Wherein, the traction body includes a rear baffle 301 , a front baffle 302 and a connecting plate 303 . The rear baffle 301 is a rectangular steel plate with the same structure as the front baffle 302. The rear baffle 301 and the front baffle 302 are connected with a connecting plate 303 parallel to the central axis of the long side to form an "H"-shaped structure. The connecting plate 303 is located at the rear Between the baffle plate 301 and the front baffle plate 302, and parallel to the horizontal plane.

At least one circular hole A306 is symmetrically opened in the middle of the rear baffle 301 and the middle of the front baffle 302 near the upper edge, and at least one circular hole B307 is opened in the middle of the front baffle 301 near the lower edge.

Sliders 304 are respectively fixed on the two ends of the rear baffle 301 and the front baffle 302 . The sliders 304 are channel-shaped sliders, and the upper and lower sides of the channel-shaped slider 304 are fixedly connected with rollers 305 . The sliders 304 at both ends of the traction body enable the traction body to slide freely between the two long sides of the pedestal 8 .

The switch mechanism 4 includes an upper cover plate 401, a lower cover plate 402, a wrench A403, and a wrench B404, as shown in FIG. 5 and FIG. 6 . Wherein, the upper cover plate 401 and the lower cover plate 402 are rectangular thin steel plates, and the upper cover plate 401 and the lower cover plate 402 have a “U”-shaped groove 405 symmetrically in the middle of the long side on one side, and the middle part of the long side on the other side is fixedly connected with a limited position. Block 406. The wrench A403 and the wrench B404 are "L"-shaped wrenches with the same structure, and the corners of the wrench A403 and the wrench B404 are axially connected between the upper cover plate 401 and the lower cover plate 402, and the axial connection positions are respectively located in the "U"-shaped grooves On both sides of the straight line where the limit block 406 is located, the opening of the wrench A403 is opposite to the opening of the wrench B404. The vertical distance from the corner of the wrench A403 to the "U" groove 405 is less than the length of the short side of the wrench A403. The short side of the wrench A403 is used to socket the wire rope, the long side of the wrench A403 overlaps with the short side of the wrench B, and the long side of the wrench B overlaps with the limit block 406 . When the wire rope bound on the short side of the wrench A403 exerts a pulling force on the short side of the wrench A403, the wrench A403 will turn to the side of the switch mechanism 4. At this time, the long side of the wrench A403 will overlap the short side of the wrench B404, driving the wrench B404 Rotate, finally the long side of the wrench B404 overlaps with the limit block 406, so that the wrench A403 and the wrench B404 are mutually fixed. At this time, the short side of the wrench A403 is parallel to the long sides of the upper cover plate 401 and the lower cover plate 402.

As shown in Figure 1, a wire rope A20 is tied on the winding shaft 202 in the above-mentioned winding mechanism 2, and the wire rope A20 is connected with one end of the spring 28, and the other end of the spring 28 is connected with a wire rope B21, and the wire rope B21 is lowered by the pulley A11 to go around the wheel A11, and is lowered by the pulley B12 and walks around the pulley B12, and is finally tied to the round hole A306 in the middle of the upper end of the tailgate 301 in the traction mechanism 3 . One end of the steel wire rope C22 is tied to the round hole B307 in the middle of the lower end of the front baffle plate 302, and the other end is sleeved on the short side of the wrench A403 in the switch mechanism 4. One end of the wire rope D23 is tied to the upper middle hole A306 of the front baffle plate 302 in the traction mechanism 3, the other end bypasses the pulley C306 from the bottom of the pulley C306, and bypasses the connection hole between the pulley D306 and the arm guard 26 from the top of the pulley D306 27, as shown in Figure 7, the arm guard 26 is used to wrap the forearm of the human body. In order to simulate the force uniformly distributed on the upper limbs of the pilot during ejection, at least two connecting holes 27 can be provided on the arm guard 26 for connecting one end of the wire rope E24, and the other end of the wire rope E24 is connected with the wire rope D23, as shown in the figure 8.

When carrying out the pilot's arm resistance airflow release force test, by turning the handle in the winding mechanism 2, the pinion 204 rotates clockwise, driving the large gear 203 to rotate, so that the winding shaft 202 starts winding. At this time, the steel wire rope A20, steel wire rope B21, Wire rope C22, wire rope D23 and spring 28 start to tighten. During this tensioning process, the short side of the wrench A403 in the switch mechanism 4 is pulled by the steel wire rope C22, so that the wrench A403 starts to rotate, causing the long side of the wrench A403 to overlap with the short side of the wrench B, and the long side of the wrench B Overlapping with the limit block 406, the wrench A403 and the wrench B are relatively fixed through the limit block 406, so that the switch mechanism 4 and the traction mechanism 3 are relatively fixed. The spring 28 is constantly elongated and deformed during the drawing-in process. When the spring 28 reaches a predetermined deformation, the winding is stopped. Because the winding shaft 202 is subjected to a reverse pulling force, the pinion 204 will reverse, but due to the contact between the caliper 205 and the The effect of the limit pin 207 prevents the pinion 204 from reversing. The experimenter can estimate the size of the prestress according to the deformation of the spring 28, and can also measure the more accurate stress through strain gauges or sensors.

Pull the long side of the wrench B404 in the switch mechanism 4, so that the short side of the wrench B404 is staggered from the overlapping position of the side of the wrench A403, so that the wire rope C22 is separated from the short side of the wrench A403, so that the spring 28 is stored when it is tensioned. The potential energy of the traction mechanism 3 is quickly converted into the kinetic energy of the traction mechanism 3. The slider 304 in the traction mechanism 3 leaves the initial position and moves quickly between the long sides of the pedestal 8. The lateral pulling force simulates the pilot's release force during ejection. Because it is a live experiment, the displacement of the slider 304 in the traction mechanism 3 cannot be too large so as not to cause damage to the excessive abduction of the human arm, so stoppers 25 are respectively installed on the long sides of the pedestal 8. , it will decelerate and stop. Since the crossbeam B10 can be installed at different heights of the rear support rod 7, the wire rope D23 will have different directions when it walks around the pulley D306, so that the arm disengagement situation can be simulated when the pilot is subjected to different directions of force during the experiment.

The design of the traction mechanism 3 of the simulation device of the present invention is simple and easy to implement, and a hollow angle steel frame is used to build the overall frame 1 . Considering that the experimental space should not be too large, the simulation device of the present invention is short and small, with a length of 1m and a width of 0.4m. The front support rod 6 is 0.6m high and weighs about 28KG. Considering the requirement of simulating air blowing in different directions, the length of the rear support rod 7 of the experimental device is 1.2m. At the same time, based on various factors such as the size of the test bench, ease of use, experimental safety, design difficulty, and the need for emergency stops and quick starts, the device uses the spring 28 driving mechanism 3 drag force to simulate the impact of airflow blowing, and to study the impact of ejection lifesaving. Airflow relief.

Claims (7)

1. A simulation device for arm airflow release force experiment, characterized in that: it comprises an integral frame, a wire winding mechanism, a traction mechanism and a switch mechanism; The overall frame includes a base, two front support rods, two rear support rods, a pedestal, a crossbeam A and a crossbeam B; wherein, the base is two parallel horizontal crossbars, and the front support rods are vertically connected to the two crossbars respectively. and the rear support bar; the pedestal is a rectangular frame, and the four sides of the rectangular frame are respectively connected with the two front support bars and the two rear support bars, and a pulley C is installed at the center of the front between the two front support bars, and the two rear support bars A pulley B is installed at the center of the back between the rods, and the remaining two relative left and right sides are slidingly connected with a traction mechanism, and stoppers are respectively installed on the left and right sides to limit the movement of the traction mechanism. distance; a switch mechanism is also installed on the front edge of the pedestal between the two front support rods; a crossbeam A is connected between the two front support rods below the plane where the pedestal is located; through holes are symmetrically arranged on the two rear support rods above the plane where the pedestal is located , used to install the beam B; a pulley A is installed in the middle of the beam A, a pulley D is installed in the middle of the beam B, and the pulley A, the pulley B, the pulley C and the pulley D are located in the same vertical plane; Both ends of the base behind the two rear support rods are connected with a winding mechanism support seat, and a winding mechanism support is connected to the winding mechanism support seat; a winding mechanism is connected between the two rear support rods below the plane where the pedestal is located The supporting beam, the height of the winding mechanism support beam is the same as the top height of the winding mechanism support, and the winding mechanism installation platform is fixedly connected horizontally on the top of the winding mechanism support beam and the winding mechanism support, A winding mechanism is installed on the winding mechanism installation platform; The winding mechanism is mainly composed of a winding reel housing, a large gear, a pinion, a winding shaft, a caliper and a handle; wherein, the winding shaft is located inside the winding reel housing, and is positioned between the side wall of the winding reel housing. For rotational connection, the large gear is fixedly connected to the winding shaft, the pinion is fixedly connected to the connecting shaft inside the winding reel housing, and the pinion gear meshes with the large gear, and one end of the connecting shaft extends out of the winding reel housing The outside is connected to the handle; one end of the caliper is rotatably connected to the inner wall of the winding reel housing, and the other end is a free end, and the free end is located at the pinion gear teeth; The limit pin, the lower edge of the caliper is a convex arc surface, and the upper edge is a straight surface; a wire rope A is tied to the winding shaft in the winding mechanism, and the wire rope A is connected to one end of the spring, and the other end of the spring is connected to the wire rope B. After B bypasses pulley A and pulley B, it is connected to the traction mechanism; one end of steel wire rope C is connected to the traction mechanism, and the other end is connected to the switch mechanism; one end of steel wire rope D is connected to the traction mechanism, and the other end bypasses pulley C and pulley D and the guard arm The sets are connected. 2. A kind of simulation device that is used for arm airflow release force experiment as claimed in claim 1, is characterized in that: described traction mechanism comprises traction body, slide block; Wherein, traction body is connected by rear baffle plate, front baffle plate The rear baffle and the front baffle are rectangular plates with the same structure, and there is a connecting plate connected horizontally between the rear baffle and the front baffle on the central axis parallel to the long side, and the two ends of the rear baffle and the front baffle are respectively The slider is fixed; round holes A are respectively set at the symmetrical positions of the rear baffle and the middle of the front baffle, and the round holes A are located close to the upper edge of the rear baffle and the front baffle; the middle of the rear baffle is provided with a round hole near the lower edge b. 3. A simulation device for arm airflow release force experiment as claimed in claim 2, characterized in that: the slide block is a channel steel structure, and the upper and lower sides in the slide block are fixedly connected with rollers. 4. A kind of simulation device for arm airflow release force experiment as claimed in claim 1, is characterized in that: described switching mechanism comprises upper cover plate, lower cover plate, wrench A, wrench B; Wherein, upper cover plate and The middle part of the long side of one side of the lower cover plate is symmetrically opened with a "U"-shaped groove, and the middle part of the long side opposite to the long side is fixedly connected with a limit block; the wrench A and wrench B are "L" with the same structure Type wrench, the corners of wrench A and wrench B are axially connected between the upper cover and the lower cover, and the axial connection positions are respectively located on both sides of the line where the "U" groove and the limit block are located, and the openings of wrench A and wrench B Relative; wherein, the vertical distance from the corner of wrench A to the "U"-shaped groove is less than the length of the short side of wrench A, when the long side of wrench B overlaps with the limit block, the short side of wrench B and the long side of wrench A When lapping, the short side of wrench A is parallel to the long sides of the upper cover and the lower cover. 5. A simulation device for arm airflow release force experiment according to claim 1, characterized in that: the height of the rear support rod is twice the height of the front support rod. 6. A kind of simulation device that is used for arm airflow release force experiment as claimed in claim 1, is characterized in that: have at least two connecting holes on the described arm guard, each connecting hole is connected with a steel wire rope E, The other ends of the steel wire rope E are all connected with the steel wire rope D. 7. A kind of simulation device that is used for arm airflow release force experiment as claimed in claim 1, is characterized in that: described base, front support rod, rear support rod, pedestal, crossbeam A, crossbeam B, winding mechanism support seat . The supporting beam of the winding mechanism and the supporting frame of the winding mechanism are angle steel structures, and the plane where the pedestal is located is parallel to the plane where the base is located.

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