CN117277652A - Motor - Google Patents

Abstract

This application discloses a motor. The motor includes a casing assembly, a main shaft, a rotor assembly and a stator assembly. The casing assembly is provided with an installation cavity; the spindle is rotatably disposed in the installation cavity and extends from the installation cavity to the casing assembly; the rotor assembly is disposed in the installation cavity and Fixed on the main shaft; the stator assembly includes windings and at least two annular stator cores, at least two annular stator cores are nested, and the windings are arranged on the outermost annular stator core , and the winding extends from both sides of the outermost annular stator core along the axial direction of the main shaft. This application can solve the problems of low transmission efficiency of existing electric motors and high energy consumption during use.

Description

Motor

Technical field

The present application relates to the technical field of driving devices, and specifically to a motor.

Background technique

Today's industrial electricity is consumed heavily by electric motors. About 14% of the electricity consumption comes from high-power motors (1MW-50MW). They drive mechanical structures from 10,000RPM to 20,000RPM through large gearboxes, and the flow is through mechanical throttle valves instead of Controlled by VSD based on power electronics, the transmission efficiency is low and the energy consumption is large.

Today, there are only low-power, high-speed permanent magnet synchronous motors on the market, and the technology is not very mature and has not been mass produced. This application aims to develop a high-power and high-torque magnetically suspended three-phase permanent magnet synchronous motor to solve the problems of low transmission efficiency and high energy consumption of existing motors.

Contents of the invention

The main purpose of this application is to provide a motor to solve the problems of low transmission efficiency and high energy consumption during use of existing motors.

This application provides a motor, including:

A casing assembly, the casing assembly is provided with an installation cavity;

A main shaft, the main shaft is rotatably provided in the installation cavity and extends from the installation cavity to the casing assembly;

A rotor assembly, the rotor assembly is arranged in the installation cavity and fixed on the main shaft;

Stator assembly, the stator assembly includes windings and at least two annular stator cores, at least two annular stator cores are nested, the windings are arranged on the outermost annular stator core, and the The windings extend out from both sides of the outermost annular stator core along the axial direction of the main shaft.

Further, the annular stator core includes two annular stator cores, and the two annular stator cores include a first stator core and a second stator core that is sleeved on the outer periphery of the first stator core. The winding is arranged on the second stator core.

Furthermore, several magnetic isolation spaces are provided in the circumferential direction of the first stator core.

Further, the magnetic isolation space is filled with supporting magnet isolation bodies.

Further, a limiting groove is provided on one of the outer circumferential surface of the first stator core and the inner circumferential surface of the second stator core, and the other one is provided with a limit groove corresponding to the limiting recess. The limiting protrusion is adapted to the groove, and both the limiting groove and the limiting protrusion extend along the axis direction of the main shaft.

Further, at least one limiting bar is provided on both sides of the stator assembly, the limiting bar extends along the radial direction of the main shaft, and the limiting bar is locked to the first fixed position through a locking member. on at least one of the sub-iron core and/or the second stator iron core.

Further, the casing assembly includes:

An annular shell, a water cooling channel is provided in the annular shell, and the water cooling channel extends along the length direction of the annular shell;

A first end cover, the first end cover is detachably provided at the first end of the annular housing, and the first end cover is provided with a plurality of first air outlets;

A second end cover is detachably provided on the second end of the annular housing opposite to the first end, and a plurality of second air outlets are provided on the second end cover.

Further, the first air outlet and the second air outlet are arranged symmetrically with respect to the annular shell.

Further, the motor also includes:

A first magnetic suspension bearing and a second magnetic suspension bearing. The first magnetic suspension bearing and the second magnetic suspension bearing are sleeved on the main shaft at intervals. The first magnetic suspension bearing and the second magnetic suspension bearing are respectively located on the stator. Both sides of the assembly, and the first magnetic suspension bearing and the second magnetic suspension bearing are at least partially located in the space between the winding and the main shaft.

Further, the motor also includes:

A junction box, the junction box is arranged on the casing assembly;

A first impeller and a second impeller, the first impeller and the second impeller are respectively fixedly connected to both ends of the main shaft.

In this application, the stator assembly of the motor is configured as at least two nested annular stator cores, and the windings are arranged on the outermost annular stator core. Such an arrangement can make the internal structure of the motor more compact. , can reduce the axial length of the motor's main shaft, thereby increasing the motor's operating power, speed and torque to a certain extent. In actual use of this motor, the motor can be directly connected to the driven mechanical structure, without the need to use an intermediate transmission mechanism such as a gearbox to connect the motor and the driven mechanical structure, which can greatly reduce energy consumption during the use of the motor, and the transmission efficiency is higher .

Description of the drawings

The drawings described here are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the attached picture:

Figure 1 is a half-sectional view of the motor disclosed in this application;

Figure 2 is a left view of the motor disclosed in this application;

Figure 3 is a right view of the motor disclosed in this application;

Figure 4 is a half-sectional view of the stator assembly of the motor disclosed in the present application;

Figure 5 is a left view of Figure 4;

FIG. 6 is an enlarged view of the M area in FIG. 5 .

Among them, the above-mentioned drawings include the following reference signs:

10. Chassis assembly; 11. Ring-shaped shell; 111. Water-cooling channel; 12. First end cover; 13. Second end cover; 101. Installation cavity; 102. First air outlet; 103. Second air outlet; 20. Main shaft; 30. Rotor assembly; 40. Stator assembly; 41. Ring-shaped stator core; 411. First stator core; 4111. Magnetic isolation space; 4112. Limiting groove; 412. Second stator core; 4121 , Limiting protrusion; 42. Winding; 43. Limiting bar; 50. Supporting magnet isolator; 60. Locking piece; 70. First magnetic levitation bearing; 80. Second magnetic levitation bearing; 90. Junction box; 100. No. One impeller; 110. The second impeller.

Detailed ways

It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular forms are also intended to include the plural forms unless the context clearly indicates otherwise. Furthermore, it will be understood that when the terms "comprises" and/or "includes" are used in this specification, they indicate There are features, steps, operations, means, components and/or combinations thereof.

The relative arrangement of components and steps, numerical expressions, and numerical values set forth in these examples do not limit the scope of the application unless specifically stated otherwise. At the same time, it should be understood that, for convenience of description, the dimensions of various parts shown in the drawings are not drawn according to actual proportional relationships. Techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered part of the authorized specification. In all examples shown and discussed herein, any specific values are to be construed as illustrative only and not as limiting. Accordingly, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters refer to similar items in the following figures, so that once an item is defined in one figure, it does not need further discussion in subsequent figures.

Referring to FIGS. 1 to 6 , according to embodiments of the present application, a motor is provided. The motor includes a casing assembly 10 , a main shaft 20 , a rotor assembly 30 and a stator assembly 40 .

Among them, the casing assembly 10 is provided with an installation cavity 101; the main shaft 20 is rotatably provided in the installation cavity 101 and extends from the installation cavity 101 to the casing assembly 10; the rotor assembly 30 is provided in the installation cavity 101 and fixed to the main shaft 20 Above; the stator assembly 40 includes a winding 42 and at least two annular stator cores 41. The at least two annular stator cores 41 are nested. The winding 42 is provided on the outermost annular stator core 41 and along the axis direction of the main shaft 20. Extending from both sides of the outermost annular stator core 41 .

In this application, since the stator assembly 40 of the motor includes at least two nested annular stator cores 41, and the winding 42 is installed on the outermost annular stator core 41, after installation, the winding 42 moves along the main axis. The axis direction of 20 extends from both sides of the outermost annular stator core 41 . At this time, under the support of the inner annular stator core 41, there is a relatively large space between the winding 42 and the main shaft 20. In this way, other structures of the motor can be assembled in the space between the winding 42 and the main shaft 20. The casing The internal structure of the assembly 10 can be moved closer to the center of the installation cavity 101 , thereby shortening the length of the entire motor in the axial direction of the main shaft 20 . The shorter the length of the main shaft 20, the higher the stability of the main shaft 20 when rotating, and the more suitable the motor is for high-speed operation and high-power and high-torque operation.

That is to say, in this embodiment, the stator assembly 40 of the motor is configured as at least two nested annular stator cores 41, and the winding 42 is arranged on the outermost annular stator core 41. In this way, The internal structure of the motor can be made more compact, the axial length of the main shaft 20 of the motor can be reduced, and the operating power, rotation speed and torque of the motor can be increased to a certain extent. In actual use of this motor, the motor can be directly connected to the driven mechanical structure, without the need to use an intermediate transmission mechanism such as a gearbox to connect the motor and the driven mechanical structure, which can greatly reduce energy consumption during the use of the motor, and the transmission efficiency is higher .

Further, the casing assembly 10 in this embodiment includes an annular casing 11 , a first end cover 12 and a second end cover 13 . A water-cooling channel 111 is embedded in the annular housing 11, and the water-cooling channel 111 extends along the length direction of the annular housing 11; a first end cap 12 is detachably provided at the first end of the annular housing 11, and the first end cap 12 is provided with There are a plurality of first air outlets 102; the second end cover 13 is detachably provided at the second end of the annular housing 11 opposite to the first end, and the second end cover 13 is provided with a plurality of second air outlets 103. In this embodiment, the casing assembly 10 is configured as an annular casing 11 , a first end cover 12 and a second end cover 13 that are detachable from each other, thereby facilitating the assembly of the internal structure of the motor. During actual installation, the first end cover 12 and the second end cover 13 can be fixed on the annular housing 11 using bolts, screws and other structures, which are simple in structure and easy to install.

In addition, a water-cooling channel 111 is provided in the annular housing 11. When the motor is working, cooling water and other liquids can be transported to the water-cooling channel 111 to facilitate water cooling of the motor. The water-cooling channel 111 can be a straight channel arranged along the length direction of the annular housing 11, or a spiral channel arranged spirally along the length direction of the annular housing 11. As long as it is a deformation method based on the concept of the present application, it can be used. within the protection scope of this application. Correspondingly, through the action of the first air outlet 102 on the first end cover 12 and the second air outlet 103 on the second end cover 13, the motor can be air-cooled.

That is to say, the motor in this embodiment can be cooled by a combination of water cooling and air cooling, which has a good cooling effect and can improve the operating stability of the motor to a certain extent.

Furthermore, the first air outlet 102 and the second air outlet 103 in this embodiment are arranged symmetrically with respect to the annular housing 11 , that is to say, the first air outlet 102 on the first end cover 12 and the second air outlet 103 on the second end cover 13 are arranged symmetrically. The two air outlets 103 are arranged facing each other, so that they are more suitable for air convection and can improve the cooling effect of the motor in this embodiment to a certain extent. For example, the number of the first air outlet 102 and the second air outlet 103 in this embodiment may be one, two, three, or more than three. Figures 2 and 3 of this application show the situation when there are four first air vents 102 and four second air vents 103 . The first air outlet 102 and the second air outlet 103 are arranged in an arc shape around the outer periphery of the main shaft 20. In this way, the structural strength of the first end cover 12 and the second end cover 13 can be taken into consideration while ensuring the heat dissipation effect.

Furthermore, the motor in this embodiment also includes a first magnetic suspension bearing 70 and a second magnetic suspension bearing 80 . The first magnetic suspension bearing 70 and the second magnetic suspension bearing 80 are sleeved on the main shaft 20 at intervals. The first magnetic suspension bearing 70 and the second magnetic suspension bearing 80 are spaced apart from each other. The magnetic levitation bearings 80 are respectively located on both sides of the stator assembly 40 , and the first magnetic levitation bearing 70 and the second magnetic levitation bearing 80 are at least partially located in the space between the winding 42 and the main shaft 20 . Compared with the prior art, the first magnetic suspension bearing 70 and the second magnetic suspension bearing 80 in this embodiment are arranged closer to the stator assembly 40, and the structure of the motor in the axial direction of the main shaft 20 is more compact. In this way, the motor can be effectively shortened. The axial length of the main shaft 20 is convenient for improving the running stability of the main shaft 20 and is more suitable for increasing the power of the motor.

Further, the motor in this embodiment also includes a junction box 90 , a first impeller 100 and a second impeller 110 . The junction box 90 is provided on the casing assembly 10 to facilitate connection to external circuits, control circuit boards and other structures; the first impeller 100 and the second impeller 110 are respectively fixedly connected to both ends of the main shaft 20 to facilitate connection with the mechanical structure to be driven.

The rotor assembly 30 includes multiple pieces of magnetic steel, which can be fixed on the rotating shaft 20 after being hot-melted and solidified through a carbon fiber protective sheath. The structure has high strength and good heat dissipation effect.

In some embodiments of the present application, the annular stator core 41 includes two, and for ease of distinction, the two annular stator cores 41 are respectively identified as a first stator core 411 and a second stator core 412 . During actual installation, the second stator core 412 is sleeved on the outer periphery of the first stator core 411, the winding 42 is provided on the second stator core 412, and the winding 42 extends from the second stator along the axial direction of the main shaft 20. Both sides of iron core 412. At this time, under the support of the first stator core 411, the winding 42 can form a relatively large space with the main shaft 20. Bearings and other structures can be installed in this space, and the structures on the main shaft 20 can be closer to the stator assembly. 40. In this way, it is convenient to shorten the length of the spindle 20 in the axis direction, and is more suitable for the smooth operation of the motor.

Furthermore, in this embodiment, several magnetic isolation spaces 4111 are provided in the circumferential direction of the first stator core 411 . For example, the number of magnetic isolation spaces 4111 may be one, two or more. The setting of the magnetic isolation space 4111 can play a certain role in magnetic isolation and ensure the operating performance of the motor.

The magnetic isolation space 4111 in this embodiment is filled with a supporting magnet isolation body 50. In actual design, the supporting magnet isolation body 50 is filled and supported in the magnetic isolation space 4111, and the supporting magnet isolation body 50 will not protrude from the first certain position. both sides of the sub-core 411 to avoid occupying the space between the winding 42 and the main shaft 20 . Through the function of the supporting magnet isolator 50, the structural strength of the stator assembly 40 in this embodiment can be improved, and the second stator core 412 provided with the winding 42 can be easily installed and supported. At the same time, the arrangement of the supporting magnet isolation body 50 can further improve the magnetic isolation effect of the first stator core 411.

Optionally, the supporting magnet isolation body 50 in this embodiment includes a polyphenylene sulfide (PPS) support body. PPS is a thermoplastic special engineering plastic with excellent comprehensive properties. Its outstanding features are high temperature resistance, corrosion resistance and superior Mechanical behavior. When the motor generates heat, the supporting magnet isolation body 50 can maintain its original shape well, thereby ensuring the supporting effect and magnetic isolation effect of the first stator core 411 . Of course, in other embodiments of the present application, the supporting magnet isolation body 50 can also be made of other high-temperature resistant plastic materials. As long as there are other deformation methods under the concept of the present application, they are all within the protection scope of the present application.

As shown in FIGS. 3 to 6 , in order to facilitate assembly, a limiting groove 4112 is provided on one of the outer peripheral surface of the first stator core 411 and the inner peripheral surface of the second stator core 412 . There is a limiting protrusion 4121 matching the limiting groove 4112. That is to say, when the limiting groove 4112 is provided on the outer peripheral surface of the first stator core 411, the limiting protrusion 4121 is provided on the inner peripheral surface of the second stator core 412; When the groove 4112 is provided on the inner peripheral surface of the second stator core 412 , the limiting protrusion 4121 is provided on the outer surface of the second stator core 412 . Figure 6 of the present application shows that the limiting groove 4112 is provided on the outer peripheral surface of the first stator core 411, and the limiting protrusion 4121 is provided on the inner peripheral surface of the second stator core 412. Condition. Wherein, the limiting groove 4112 and the limiting protrusion 4121 both extend along the axial direction of the main shaft 20 . Optionally, the limiting groove 4112 is a dovetail groove, and the corresponding limiting protrusion 4121 is a limiting block that matches the dovetail groove. During actual installation, the limiting groove 4112 and the limiting protrusion 4121 are used. The limiting cooperation function can prevent the second stator core 412 from moving in the radial direction of the first stator core 411, and the structure is stable and reliable.

In this embodiment, at least one limiting bar 43 is provided on both sides of the stator assembly 40 . The limiting bar 43 extends along the radial direction of the stator assembly 40 , and the limiting bar 43 is locked to the first position through the locking member 60 . on at least one of the stator core 411 and/or the second stator core 412 . That is to say, the limiting bar 43 can be locked on the first stator core 411 through the locking piece 60 , or can be locked on the second stator core 412 through the locking piece 60 , or it can also be locked on the first stator core 412 through the locking piece 60 It is locked on the first stator core 411 and the second stator core 412 at the same time. Through the function of the limiting bar 43, not only the first stator core 411 and the second stator core 412 can be fixed together, but also the first stator core 411 and the second stator core 412 can be prevented from moving along the main axis 20 Relative displacement occurs in the axis direction. Optionally, a plurality of limiting bars 43 are provided on both sides of the stator assembly 40 in this embodiment. The plurality of limiting bars 43 extend along the radial direction of the main shaft 20 and are arranged in a radial manner. In this way, it is convenient to The first stator core 411 and the second stator core 412 are stably connected together.

Illustratively, the locking member 60 in this embodiment may be a locking screw, a locking pin, a locking buckle, or other structures, which are not specifically limited in this application.

Optionally, the winding 42 in this application adopts FCR film cladding wire, 10KV high-voltage mature insulation structure and H-class insulation system. The magnetic steel of the rotor assembly 30 is high-temperature resistant N42SH and other magnetic materials above. The rotating shaft 20 is made of 42CrMo forged and pressed shaft, which is heat treated after processing. The first impeller 100 and the second impeller 110 are made of aviation aluminum 7075.

For the convenience of description, spatially relative terms can be used here, such as "on...", "on...", "on the upper surface of...", "above", etc., to describe what is shown in the figure. The spatial relationship between one device or feature and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a feature in the figure is turned upside down, then one feature described as "above" or "on top of" other features or features would then be oriented "below" or "below" the other features or features. under other devices or structures". Thus, the exemplary term "over" may include both orientations "above" and "below." The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, it should be noted that the use of words such as "first" and "second" to define parts is only to facilitate the distinction between corresponding parts. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood. To limit the scope of protection of this application.

The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included in the protection scope of this application.

Claims (10)

1. A motor, characterized in that it includes: A casing assembly (10), the casing assembly (10) is provided with an installation cavity (101); Main shaft (20), the main shaft (20) is rotatably provided in the installation cavity (101) and extends from the installation cavity (101) to the casing assembly (10); Rotor assembly (30), the rotor assembly (30) is arranged in the installation cavity (101) and fixed on the main shaft (20); Stator assembly (40), the stator assembly (40) includes a winding (42) and at least two annular stator cores (41), at least two annular stator cores (41) are nested, and the winding (42) 42) is provided on the outermost annular stator core (41), and the winding (42) extends from the outermost annular stator core (41) along the axial direction of the main shaft (20) both sides. 2. The motor according to claim 1, wherein the annular stator core (41) includes two, and the two annular stator cores (41) include a first stator core (411) and a first stator core (411). The second stator core (412) is sleeved on the outer periphery of the first stator core (411), and the winding (42) is provided on the second stator core (412). 3. The motor according to claim 2, wherein a plurality of magnetic isolation spaces (4111) are provided in the circumferential direction of the first stator core (411). 4. The motor according to claim 3, characterized in that the magnetic isolation space (4111) is filled with a supporting magnet isolation body (50). 5. The motor according to claim 2, characterized in that, one of the outer peripheral surface of the first stator core (411) and the inner peripheral surface of the second stator core (412) is provided Limiting groove (4112), the other side of the two is provided with a limiting protrusion (4121) that matches the limiting groove (4112), the limiting groove (4112) and the limiting groove (4112) The protrusions (4121) all extend along the axial direction of the main shaft (20). 6. The motor according to claim 2, characterized in that at least one limiting bar (43) is provided on both sides of the stator assembly (40), and the limiting bar (43) is along the main axis (40). 20), and the limiting bar (43) is locked to both the first stator core (411) and/or the second stator core (412) through the locking piece (60). At least one of them. 7. The motor according to any one of claims 1 to 6, characterized in that the housing assembly (10) includes: An annular shell (11), a water cooling channel (111) is provided in the annular shell (11), and the water cooling channel (111) extends along the length direction of the annular shell (11); A first end cover (12), the first end cover (12) is detachably provided at the first end of the annular housing (11), the first end cover (12) is provided with several first tuyere(102); A second end cap (13), the second end cap (13) is detachably provided at the second end of the annular housing (11) opposite to the first end, the second end cap (13) Several second air outlets (103) are provided on it. 8. The motor according to claim 7, characterized in that the first air outlet (102) and the second air outlet (103) are arranged symmetrically with respect to the annular housing (11). 9. The motor according to any one of claims 1 to 6, characterized in that the motor further includes: A first magnetic suspension bearing (70) and a second magnetic suspension bearing (80). The first magnetic suspension bearing (70) and the second magnetic suspension bearing (80) are sleeved on the main shaft (20) at intervals. A magnetic suspension bearing (70) and the second magnetic suspension bearing (80) are respectively located on both sides of the stator assembly (40), and the first magnetic suspension bearing (70) and the second magnetic suspension bearing (80) are at least partially located on in the space between the winding (42) and the main shaft (20). 10. The motor according to any one of claims 1 to 6, characterized in that the motor further includes: A junction box (90), the junction box (90) is provided on the casing assembly (10); A first impeller (100) and a second impeller (110). The first impeller (100) and the second impeller (110) are respectively fixedly connected to both ends of the main shaft (20).