High-speed motor with negative pressure air cooling structure and air suspension fluid equipment

Abstract

The utility model relates to a high-speed motor with a negative pressure air cooling structure and air suspension fluid equipment, and belongs to the technical field of motor heat dissipation. The high-speed motor comprises a motor shell, a stator and a rotor, the stator and the rotor are arranged in the motor shell, a first heat dissipation air channel is formed between the rotor and the stator, a baffle ring is arranged between the stator and the motor shell, the motor shell is provided with a first air inlet and a second air inlet, and the first air inlet and the second air inlet are located on the two sides of the baffle ring. A second heat dissipation air channel and a third heat dissipation air channel are formed between the stator and the motor shell; a second cavity and a first cavity are formed among the stator, the motor shell and the rear end cover and among the stator, the motor shell and the front end cover, and the first cavity is communicated with the second cavity through a first heat dissipation air channel. According to the high-speed motor with the novel air cooling structure, through the multi-channel heat dissipation design and the optimized air inlet layout, the heat dissipation efficiency is remarkably improved, and the stable operation of the motor under a high load is ensured.

Description

Technical Field

[0001] The utility model relates to a high-speed motor with a negative pressure air cooling structure and air suspension fluid equipment, belonging to the technical field of motor heat dissipation. Background Art

[0002] High-speed permanent magnet synchronous motors have the advantages of high efficiency and high power density, and have been widely used in industries such as industry and transportation. However, as the speed of the motor increases, the heat dissipation of the motor becomes particularly important. At present, the main heat dissipation methods for motors are water cooling, air cooling or mixed cooling. Water cooling has the advantages of high heat dissipation efficiency, convenient and precise adjustment, and space saving, but it has the disadvantages of high maintenance cost, complex cooling system design, and poor heat dissipation effect of the rotor. Although air cooling has low cost and simple structure, it has relatively low heat dissipation efficiency and is difficult to meet the heat dissipation requirements of high-speed permanent magnet synchronous motors. Especially in air-suspended fluid equipment using high-speed permanent magnet synchronous motors, when air cooling is used, there is often a problem of insufficient heat dissipation of the stator and rotor, causing high-temperature breakdown of the stator winding, affecting the stable operation of the motor. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a high-speed motor with a negative pressure air cooling structure, which significantly improves the heat dissipation efficiency of the stator and rotor through a multi-channel heat dissipation design and an optimized air inlet layout, ensuring the stable operation of the motor under high load.

[0004] At the same time, the utility model also provides an air suspension fluid device using the high-speed motor.

[0005] The technical solution of the utility model is:

[0006] A high-speed motor with a negative pressure air cooling structure comprises a motor housing and a stator and a rotor arranged inside the motor housing, the stator comprising a stator core and a stator winding wound on the stator core, a first heat dissipation air duct is formed between the rotor and the stator, a retaining ring is arranged between the stator and the motor housing, a first air inlet and a second air inlet are arranged on the motor housing, and the first air inlet and the second air inlet are located on both sides of the retaining ring, so that a second heat dissipation air duct and a third heat dissipation air duct are formed between the stator and the motor housing;

[0007] A front cover and a rear cover are respectively provided at both ends of the motor housing, a second cavity is formed between the stator, the motor housing and the rear cover, a first cavity is formed between the stator, the motor housing and the front cover, the second heat dissipation duct is connected to the first cavity, the third heat dissipation duct is connected to the second cavity, and the first cavity is connected to the second cavity through the first heat dissipation duct;

[0008] A heat dissipation impeller is arranged on the outer side of the rear end cover, and the heat dissipation impeller is mounted on the end of the rotor. The rotation of the heat dissipation impeller generates a negative pressure environment, and draws external cooling air into the interior of the motor housing.

[0009] Preferably, according to the utility model, an impeller protection cover is arranged outside the heat dissipation impeller, an air cylinder is arranged around the outside of the impeller protection cover, and an air cylinder cover is arranged at the end of the air cylinder, so that a third cavity is formed between the rear end cover, the air cylinder and the air cylinder cover.

[0010] Preferably, according to the utility model, a first air vent is opened on the rear end cover to connect the second cavity with the third cavity, and the outer diameter of the impeller protection cover is smaller than the distance from the first air vent to the central axis of the rotor, so that the cooling air inside the motor casing enters the third cavity through the first air vent.

[0011] Preferably, according to the utility model, a fourth air inlet is provided at a position of the motor housing near the rear end cover, and / or a third air inlet is provided at a position of the motor housing near the front end cover; the third air inlet corresponds to the position of the stator winding at the front end, or the fourth air inlet corresponds to the position of the stator winding at the rear end.

[0012] Preferably, the area of ​​the first air inlet / the second air inlet is larger than the area of ​​the third air inlet / the fourth air inlet, which is beneficial to the effective flow and heat dissipation of cooling air.

[0013] According to the preferred embodiment of the present invention, the retaining ring is fixed between the stator and the motor housing, and the retaining ring is a closed annular structure. The retaining ring divides the air duct between the motor housing and the stator into two parts, namely, the second heat dissipation air duct and the third heat dissipation air duct.

[0014] Preferably, according to the utility model, a first connecting ring and a second connecting ring are provided at both ends of the stator core, and the first connecting ring is located close to the front end cover, and the second connecting ring is located close to the rear end cover, and a plurality of second air vents are provided on the first connecting ring, and a plurality of third air vents are provided on the second connecting ring.

[0015] Preferably, according to the present invention, a plurality of wiring holes are further provided on the motor housing, and the wiring holes are located between the second connecting ring and the rear end cover.

[0016] On the other hand, the utility model also provides an air suspension fluid device, including an impeller, a volute and the above-mentioned high-speed motor with negative pressure air cooling structure, the impeller is installed at the front end of the rotor, and the volute is sleeved on the outside of the impeller.

[0017] Preferably, according to the present utility model, the air suspension fluid equipment is an air suspension blower, an air suspension vacuum pump or an air suspension compressor.

[0018] The beneficial effects of the utility model are:

[0019] The utility model provides a high-speed motor with a negative pressure air cooling structure. Through a multi-channel heat dissipation design and an optimized air inlet layout, the heat dissipation efficiency of the motor is significantly improved, ensuring the stable operation of the motor under high load. By opening a first air inlet and a second air inlet on the motor housing and setting a baffle, a second heat dissipation air duct and a third heat dissipation air duct are formed between the motor housing and the stator, and the negative pressure generated by the heat dissipation impeller is used to efficiently dissipate heat from the inside of the high-speed motor. This design can enhance the heat dissipation effect on the stator winding and the rotor, especially the heat dissipation effect on the rear end stator end winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a blower using a high-speed motor with a negative pressure air cooling structure provided by the utility model.

[0021] Figure 2 This is a structural schematic diagram of the stator core provided by the utility model.

[0022] Figure 3 A schematic diagram of the path of cooling air in the air duct of the blower provided by the utility model.

[0023] 1. rotor, 2. stator, 3. motor housing, 4. stator core, 5. stator winding, 6. first cooling duct, 7. first air inlet, 8. second air inlet, 9. third air inlet, 10. fourth air inlet, 11. cooling impeller, 12. second air vent, 13. third air vent, 14. impeller protection cover, 15. air outlet, 16. front end cover, 17. rear end cover, 18. second cooling duct, 19. third cooling duct, 20. first air vent, 21. volute, 22. impeller, 23. first connecting ring, 24. second connecting ring, 25. air cylinder, 26. air cylinder cover, 27. retaining ring. DETAILED DESCRIPTION

[0024] Several embodiments of the present application will be disclosed below with diagrams to clearly and completely describe the technical solution of the present utility model, which constitute a part of the specification of the present application. The drawings are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions of the present utility model are used to explain the present utility model and do not constitute an improper limitation on the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present utility model.

[0025] It should be noted that unless a direction is defined separately, the directions such as up, down, left, and right mentioned in this document are based on the embodiments of this application. Figure 1The directions of up, down, left, right, etc. shown in the figure shall prevail. If the specific posture changes, the directional indication will also change accordingly. The words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. In addition, in various embodiments of the present disclosure, the same or similar reference numerals represent the same or similar components.

[0026] In the present invention, unless otherwise specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral body, unless otherwise specified. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] Example 1

[0029] This embodiment provides a high-speed motor with a negative pressure air cooling structure, such as Figure 1 As shown, the motor housing 3 includes a stator 2 and a rotor 1 arranged inside the motor housing 3, a first heat dissipation duct 6 is formed between the rotor 1 and the stator 2, and a baffle ring 27 is arranged between the stator 2 and the motor housing 3, a first air inlet 7 and a second air inlet 8 are arranged on the motor housing 3, and the first air inlet 7 and the second air inlet 8 are located on both sides of the baffle ring 27, so that a second heat dissipation duct 18 and a third heat dissipation duct 19 are formed between the stator 2 and the motor housing 3;

[0030] The two ends of the motor housing 3 are respectively provided with a front cover 16 and a rear cover 17, a second cavity is formed between the stator 2, the motor housing 3 and the rear cover 17, a first cavity is formed between the stator 2, the motor housing 3 and the front cover 16, a second heat dissipation duct 18 is connected to the first cavity, a third heat dissipation duct 19 is connected to the second cavity, and the first cavity is connected to the second cavity through the first heat dissipation duct 6;

[0031] A cooling impeller 11 is provided on the outer side of the rear end cover 17, and the cooling impeller 11 is mounted on the end of the rotor 1. The rotation of the cooling impeller 11 generates a negative pressure environment, which draws external cooling air into the interior of the motor housing 3, and then passes through the cooling air duct and is discharged through the cooling impeller 11.

[0032] The path of cooling air in the air duct can be referred to Figure 3As indicated by the arrow in the middle, the working process of the motor is as follows: when the rotor 1 rotates, the heat dissipation impeller 11 is driven to rotate. Under the negative pressure generated by the heat dissipation impeller 11, a portion of the cooling air passes through the first air inlet 7 on the motor housing 3, the second heat dissipation air duct 18 between the stator 2 and the motor housing 3, the first cavity, and the first heat dissipation air duct 6 between the stator 2 and the rotor 1, and reaches the second cavity;

[0033] Another part of the cooling air passes through the second air inlet 8 on the motor housing 3 and the third heat dissipation duct 19 between the stator 2 and the motor housing 3 to reach the second cavity;

[0034] After reaching the second cavity, the cooling air passes through the first vent hole 20 on the rear end cover 17 and enters the air inlet of the heat dissipation impeller 11 ; finally, the cooling air is discharged to the outside through the air outlet 15 .

[0035] Example 2

[0036] A high-speed motor with a negative pressure air cooling structure is different from Embodiment 1 in that:

[0037] An impeller protection cover 14 is arranged outside the heat dissipation impeller 11 , and a wind tube 25 is arranged around the outside of the impeller protection cover 14 . A wind tube cover 26 is arranged at the end of the wind tube 25 , so that a third cavity is formed between the rear end cover 17 , the wind tube 25 and the wind tube cover 26 .

[0038] Example 3

[0039] A high-speed motor with a negative pressure air cooling structure is different from Embodiment 1 in that:

[0040] A first air vent 20 is provided on the rear end cover 17 to connect the second cavity with the third cavity. The outer diameter of the impeller protection cover 14 is smaller than the distance from the first air vent 20 to the central axis of the rotor 1, so that the cooling air inside the motor housing 3 enters the third cavity through the first air vent 20.

[0041] Example 4

[0042] A high-speed motor with a negative pressure air cooling structure is different from Embodiment 1 in that:

[0043] The motor housing 3 is provided with a fourth air inlet 10 near the rear end cover 17 . The stator 2 includes a stator core 4 and a stator winding 5 . The fourth air inlet 10 corresponds to the position of the stator winding 5 at the rear end.

[0044] The specific process is: the cooling air enters the second cavity inside the motor housing 3 through the fourth air inlet 10, and merges with the cooling air passing through the first heat dissipation air duct 6 to achieve cooling of the rotor 1 and the stator 2; in particular, the heat dissipation effect on the stator winding 5 at the rear end is enhanced.

[0045] The cooling air in the second cavity enters the air inlet of the heat dissipation impeller 11 through the first vent hole 20 on the rear end cover 17, and then passes through the supercharger of the heat dissipation impeller 11, and finally the cooling air is discharged to the outside through the air outlet 15. The path of the cooling air in the air duct can be referred to Figure 3 The direction of the arrow.

[0046] Example 5

[0047] A high-speed motor with a negative pressure air cooling structure is different from Embodiment 1 in that:

[0048] The motor housing 3 is provided with a third air inlet 9 near the front cover 16 . The stator 2 includes a stator core 4 and a stator winding 5 . The third air inlet 9 corresponds to the position of the stator winding 5 at the front end.

[0049] The specific process is as follows: the cooling air enters the first cavity inside the motor housing 3 through the third air inlet 9, and first merges with the cooling air in the second heat dissipation duct 18 to cool the stator winding 5 at the front end; then passes through the first heat dissipation duct 6 and merges with the cooling air in the second cavity to cool the rotor 1 and the stator winding 5 at the rear end;

[0050] The cooling air in the second cavity enters the air inlet of the heat dissipation impeller 11 through the first vent hole 20 on the rear end cover 17, and then passes through the supercharger of the heat dissipation impeller 11, and finally the cooling air is discharged to the outside through the air outlet 15. The path of the cooling air in the air duct can be referred to Figure 3 The direction of the arrow.

[0051] Example 6

[0052] A high-speed motor with a negative pressure air cooling structure is different from Embodiment 1 in that:

[0053] A fourth air inlet 10 is provided at the rear end of the motor housing 3, and a third air inlet 9 is provided at the front end cover 16 of the motor; the stator 2 includes a stator core 4 and a stator winding 5, the third air inlet 9 corresponds to the position of the front end stator winding 5, and the fourth air inlet 10 corresponds to the position of the rear end stator winding 5.

[0054] The specific process is as follows: the cooling air enters the first cavity inside the motor housing 3 through the third air inlet 9, and first merges with the cooling air from the second heat dissipation duct 18 to cool the stator 2 and the stator winding 5 at the front end; then passes through the first heat dissipation duct 6 and enters the second cavity;

[0055] The cooling air enters the second cavity inside the motor housing 3 through the fourth air inlet 10 and merges with the cooling air passing through the first heat dissipation air duct 6 to cool the rotor 1 and the stator 2, especially enhancing the heat dissipation effect on the stator winding 5 at the rear end.

[0056] The cooling air in the second cavity then enters the air inlet of the heat dissipation impeller 11 through the first air vent 20 on the rear end cover 17 , is pressurized by the heat dissipation impeller 11 , and is finally discharged to the outside through the air outlet 15 .

[0057] The third air inlet 9 or the fourth air inlet 10 is directly facing the end of the stator winding 5, accelerating the cooling of the stator winding 5 coil, and ensuring sufficient cooling of the stator winding 5. For high-power high-speed motors, the heat at both ends of the stator winding 5 is more serious. According to the power, the fourth air inlet 10, the third air inlet 9, or the fourth air inlet 10 and the third air inlet 9 can be set. The path of the cooling air in the air duct can be referred to Figure 3 The direction of the arrow.

[0058] Example 7

[0059] A high-speed motor with a negative pressure air cooling structure is different from Embodiment 4, Embodiment 5, and Embodiment 6 in that:

[0060] The area of ​​the first air inlet 7 / the second air inlet 8 is larger than the area of ​​the third air inlet 9, and the area of ​​the first air inlet 7 / the second air inlet 8 is larger than the area of ​​the fourth air inlet 10. This is beneficial to ensure the heat dissipation effect on both ends of the rotor 1 and the stator winding 5. The size of each air inlet area is adaptively determined based on the heat generation of the stator 2 and the rotor 1.

[0061] Example 8

[0062] A high-speed motor with a negative pressure air cooling structure is different from Embodiment 1 in that:

[0063] The retaining ring 27 is fixed between the stator 2 and the motor housing 3, and the retaining ring 27 is a closed ring structure. The retaining ring 27 divides the air duct between the motor housing 3 and the stator 2 into two parts, namely, the second heat dissipation air duct 18 and the third heat dissipation air duct 19. Such a design can reduce the temperature of the cooling air gathered in the second cavity.

[0064] Example 9

[0065] A high-speed motor with a negative pressure air cooling structure is different from Embodiment 1 in that:

[0066] like Figure 2As shown, a first connecting ring 23 and a second connecting ring 24 are further provided at both ends of the stator core 4, and the first connecting ring 23 is located near the front end cover 16, and the second connecting ring 24 is located near the rear end cover 17. A plurality of second vents 12 are provided on the first connecting ring 23, and a plurality of third vents 13 are provided on the second connecting ring 24. The number of the second vents 12 and the third vents 13 can be set according to actual needs, and the shape of the second vents 12 and the third vents 13 can be an arched structure.

[0067] Example 10

[0068] A high-speed motor with a negative pressure air cooling structure is different from Embodiment 9 in that:

[0069] The motor housing 3 is also provided with a plurality of wiring holes, which are located between the second connecting ring 24 and the rear end cover 17 .

[0070] Embodiment 11

[0071] This embodiment provides an air suspension fluid device, such as Figure 1 As shown, it includes an impeller 22, a volute 21 and a high-speed motor with a negative pressure air cooling structure provided by any one of Examples 1-10, the motor is used to drive the air suspension fluid equipment, the impeller 22 is installed at the front end of the rotor 1, and the volute 21 is mounted on the outside of the impeller 22.

[0072] Example 12

[0073] An air suspension fluid device, which is different from Example 11 in that the air suspension fluid device is an air suspension blower, an air suspension vacuum pump or an air suspension compressor. Figure 1 The figure is a schematic diagram of the structure of the air suspension blower, and the drawings of other products are not shown in this patent. Among them, the two-stage air suspension compressor can choose to install a second impeller at the rear end of the rotor 1, and the second impeller is set at the rear end of the heat dissipation impeller 11.

[0074] The above description shows and describes the preferred implementation of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other implementations, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the object concept of this article through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

Claims

1. A high-speed motor with a negative pressure air cooling structure, characterized in that: The invention comprises a motor housing and a stator and a rotor arranged inside the motor housing, wherein the stator comprises a stator core and a stator winding wound on the stator core, a first heat dissipation duct is formed between the rotor and the stator, a retaining ring is arranged between the stator and the motor housing, a first air inlet and a second air inlet are arranged on the motor housing, and the first air inlet and the second air inlet are located on both sides of the retaining ring, so that a second heat dissipation duct and a third heat dissipation duct are formed between the stator and the motor housing; A front cover and a rear cover are respectively provided at both ends of the motor housing, a second cavity is formed between the stator, the motor housing and the rear cover, a first cavity is formed between the stator, the motor housing and the front cover, the second heat dissipation duct is connected to the first cavity, the third heat dissipation duct is connected to the second cavity, and the first cavity is connected to the second cavity through the first heat dissipation duct; A heat dissipation impeller is arranged on the outer side of the rear end cover, and the heat dissipation impeller is mounted on the end of the rotor. The rotation of the heat dissipation impeller generates a negative pressure environment, and draws external cooling air into the interior of the motor housing.

2. A high-speed motor with a negative pressure air cooling structure according to claim 1, characterized in that: An impeller protection cover is arranged outside the heat dissipation impeller, a wind tube is arranged around the outside of the impeller protection cover, and a wind tube cover is arranged at the end of the wind tube, so that a third cavity is formed between the rear end cover, the wind tube and the wind tube cover.

3. A high-speed motor with a negative pressure air cooling structure according to claim 2, characterized in that: A first air vent is provided on the rear end cover, connecting the second cavity with the third cavity. The outer diameter of the impeller protection cover is smaller than the distance from the first air vent to the central axis of the rotor, so that the cooling air inside the motor housing enters the third cavity through the first air vent.

4. The high-speed motor with negative pressure air cooling structure according to claim 1, characterized in that: A fourth air inlet is provided at a position of the motor housing near the rear end cover, and / or a third air inlet is provided at a position of the motor housing near the front end cover; the third air inlet corresponds to the position of the stator winding at the front end, or the fourth air inlet corresponds to the position of the stator winding at the rear end.

5. A high-speed motor with a negative pressure air cooling structure according to claim 4, characterized in that: The area of ​​the first air inlet / the second air inlet is greater than the area of ​​the third air inlet / the area of ​​the fourth air inlet.

6. The high-speed motor with negative pressure air cooling structure according to claim 1, characterized in that: The retaining ring is fixed between the stator and the motor housing, and the retaining ring is a closed annular structure.

7. The high-speed motor with negative pressure air cooling structure according to claim 1, characterized in that: A first connecting ring and a second connecting ring are also provided at both ends of the stator core, and the first connecting ring is located near the front end cover, and the second connecting ring is located near the rear end cover. The first connecting ring is provided with a plurality of second vents, and the second connecting ring is provided with a plurality of third vents.

8. The high-speed motor with negative pressure air cooling structure according to claim 7, characterized in that: The motor housing is also provided with a plurality of wiring holes, which are located between the second connecting ring and the rear end cover.

9. An air suspension fluid device, characterized in that: The invention comprises an impeller, a volute and a high-speed motor according to any one of claims 1 to 8, wherein the impeller is mounted at the front end of the rotor and the volute is sleeved on the outside of the impeller.

10. The air suspension fluid device according to claim 9, characterized in that: The air suspension fluid device is an air suspension blower, an air suspension vacuum pump or an air suspension compressor.

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