Air bearing components, motors, air compressors

Abstract

The present invention provides an air suspension bearing assembly, a motor, and an air compressor, wherein the air suspension bearing assembly includes a bearing seat and an air suspension bearing connected to the bearing seat, and a heat conductor is sandwiched between the bearing seat and the air suspension bearing, and the heat conductor can conduct the heat generated by wind grinding at the air suspension bearing to the bearing seat. According to the present invention, the heat conductor can conduct the heat generated by wind grinding at the air suspension bearing to the bearing seat in a timely manner, ensure the cooling of the bearing, enhance the heat dissipation capacity of the bearing seat, and improve the bearing performance and reliability.

Description

Technical Field

[0001] The invention belongs to the technical field of motor design, and in particular relates to an air suspension bearing assembly, a motor, and an air compressor. Background Art

[0002] At present, the motor in the structure of dynamic pressure air suspension air compressor (air compressor) is composed of rear cover assembly, motor housing, motor stator, front cover assembly, motor rotor, volute, radial air bearing, axial air bearing and axial bearing seat. Each component is fastened with fasteners such as screws. The motor housing contains a cooling water channel, and coolant is passed during operation to cool the entire air compressor.

[0003] The radial air bearing is usually fixed to the radial bearing base of the rear cover assembly and the front cover assembly by welding / snapping, etc. to form an integral bearing; the axial air bearing is usually fixed to the axial bearing seat by welding / snapping, etc. to form an integral axial bearing.

[0004] The main defects of the existing technical structure are as follows:

[0005] (1) The air bearing cannot dissipate heat, and long-term operation of the air compressor will cause heat accumulation inside the entire machine:

[0006] Due to the limitation of the volume of the air compressor, cooling water channels cannot be set at the rear cover assembly, front cover assembly, axial bearings and radial bearings in the axial bearing seat. The heat generated by the wind wear loss caused by the high-speed rotation of the rotor at the bearing can only be dissipated by the contact of each end cover to the lower temperature casing with water cooling channel, and the heat dissipation efficiency is low. If the air compressor runs for a long time, the bearing can only transfer heat to the lower temperature casing by the bearing seat. The heat transfer process is far away from the water cooling channel of the whole machine, and the heat exchange efficiency is low, which leads to heat accumulation at the bearing. When the accumulated heat is too high, it may cause the bearing to deform due to heat, affecting the performance and reliability of the whole machine.

[0007] (2) Abnormal heating of the bearing affects the motor stator:

[0008] In the whole machine structure, the rear cover assembly and the front cover assembly are usually directly connected to the water-cooled casing / water-cooled channel or are close to the water-cooled channel, and their temperature is relatively low, so the bearings and stator winding ends are generally cooled through the end covers. When the air compressor is running for a long time, the air bearings continue to generate heat. Due to insufficient heat dissipation at the air bearings and air circulation inside the air compressor, the motor stator windings (that is, the stator winding ends) will be continuously subjected to heat conduction from the bearings, causing the winding temperature to rise abnormally, greatly affecting the operating conditions of the bearings and stators, and increasing the instability of the work.

[0009] In summary, the cooling structure of the air compressor in the prior art has problems such as being unable to ensure the cooling and reliability of the bearing position, having a poor cooling effect, and having improper design that affects the bearing performance and the performance of the entire machine. Summary of the invention

[0010] Therefore, the present invention provides an air suspension bearing assembly, a motor, and an air compressor, which can overcome the shortcomings of the prior art that the air suspension bearing assembly lacks the necessary cooling structure, resulting in the heat generated by the wind grinding loss of the air suspension bearing cannot be cooled in time, resulting in poor cooling effect and reduced reliability of the motor or air compressor.

[0011] In order to solve the above problems, the present invention provides an air suspension bearing assembly, including a bearing seat and an air suspension bearing connected to the bearing seat, a heat conductor is sandwiched between the bearing seat and the air suspension bearing, and the heat conductor can conduct the heat generated by wind grinding at the air suspension bearing to the bearing seat.

[0012] In some embodiments, a space formed by the air suspension bearing and the bearing seat and a space outside the heat conductive member are filled with heat conductive glue.

[0013] In some embodiments, the thermally conductive adhesive is epoxy resin.

[0014] In some embodiments, there are a plurality of heat conducting members, and the plurality of heat conducting members are evenly spaced apart along the circumference of the air bearing.

[0015] In some embodiments, the air suspension bearing is a radial bearing, and the bearing seat is one of a front end cover and a rear end cover of the motor.

[0016] In some embodiments, the air suspension bearing is an axial bearing, and the bearing seat is one of a front axial bearing seat and a rear axial bearing seat.

[0017] In some embodiments, the heat conductor includes a first heat pipe, a first end of the first heat pipe is in contact with the inner ring of the axial bearing, and a second end of the first heat pipe is in contact with the outer ring of the front axial bearing seat or the rear axial bearing seat.

[0018] In some embodiments, a mounting groove is configured on the front axial bearing seat and / or the rear axial bearing seat, and the first heat pipe is installed in the mounting groove.

[0019] The present invention also provides a motor, comprising the above-mentioned air suspension bearing assembly.

[0020] In some embodiments, the motor further comprises a casing, a cooling channel is configured in the casing, and heat exchange is formed between one end of the heat conducting member and the cooling channel.

[0021] The present invention also provides an air compressor, comprising the above-mentioned motor.

[0022] The present invention provides an air suspension bearing assembly, a motor, and an air compressor, wherein the heat conducting member can conduct the heat generated by wind grinding at the air suspension bearing to the bearing seat in a timely manner, thereby ensuring the cooling of the bearing, enhancing the heat dissipation capacity of the bearing seat, and improving the bearing performance and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the exploded structure of the air suspension bearing assembly according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A cross-sectional view of the air suspension bearing assembly after assembly;

[0025] Figure 3 is a schematic diagram of a partial structure of an air suspension bearing assembly in an embodiment of the present invention;

[0026] Figure 4 The figure is a schematic structural diagram of an air compressor according to another embodiment of the present invention.

[0027] The reference numerals are:

[0028] 1. Radial bearing; 21. Front end cover; 22. Rear end cover; 3. Axial bearing; 41. Front axial bearing seat; 42. Rear axial bearing seat; 51. First heat pipe; 52. Second heat pipe; 6. Mounting groove; 101. Cooling channel; 102. Casing; 103. Stator winding end; 105. Rotating shaft; 106. Volute. DETAILED DESCRIPTION

[0029] See also Figures 1 to 4 As shown, according to an embodiment of the present invention, an air suspension bearing assembly is provided, comprising a bearing seat and an air suspension bearing connected to the bearing seat, a heat conductor is sandwiched between the bearing seat and the air suspension bearing, and the heat conductor can conduct the heat generated by wind grinding at the air suspension bearing to the bearing seat. In this technical solution, the heat conductor can conduct the heat generated by wind grinding at the air suspension bearing to the bearing seat in a timely manner, ensure the cooling of the bearing, enhance the heat dissipation capacity of the bearing seat, and improve the bearing performance and reliability.

[0030] In some embodiments, the space formed by the air suspension bearing and the bearing seat and the space outside the heat conductive member are filled with a heat conductive adhesive, such as epoxy resin. In this technical solution, the heat conductive adhesive can further ensure the heat exchange efficiency between the air suspension bearing and the heat conductive member, and ensure the position reliability of the heat conductive member. More importantly, the heat conductive adhesive can also have a certain elasticity, which can form displacement compensation for the foil (such as the bottom foil) in the air suspension bearing, thereby ensuring the reliability of the air suspension bearing.

[0031] There are multiple heat-conducting members, and the multiple heat-conducting members are evenly spaced along the circumference of the air suspension bearing to achieve balanced cooling of the air suspension bearing. In a preferred embodiment, the heat-conducting member is preferably a heat pipe, and the thermal conductivity of the heat pipe is generally 15 to 25 times that of the thermal conductivity of the bearing seat material to improve the thermal conductivity efficiency.

[0032] In one embodiment, the air suspension bearing is a radial bearing 1, and the bearing seat is one of the front cover 21 and the rear cover 22 of the motor. Specifically, the front cover 21 and the rear cover 22 are respectively configured with bearing chambers for accommodating the radial bearing 1, and the heat conductive member includes a second heat pipe 52, a part of which is located between the bottom foil of the radial bearing 1 and the front cover 21 or the rear cover 22, and the other part extends along the surface of the front cover 21 or the rear cover 22 to ensure that heat is conducted from the radial bearing 1 to the position of the front cover 21 or the rear cover 22.

[0033] In another embodiment, the air suspension bearing is an axial bearing 3, the bearing seat is one of the front axial bearing seat 41 and the rear axial bearing seat 42, and the heat-conducting member includes a first heat pipe 51, the first end of the first heat pipe 51 is in contact with the inner ring of the axial bearing 3, and the second end of the first heat pipe 51 is in contact with the outer ring of the front axial bearing seat 41 or the rear axial bearing seat 42. Such a configuration can quickly transfer the heat of the inner ring of the bearing to the low-temperature area of ​​the outer ring of the end cover through the heat pipe for cooling. At this time, the first heat pipe 51 is specifically, for example, a long strip type. In other cases, the first heat pipe 51 can also be set as a spider web structure, and the guide bars at the position corresponding to the inner ring of the axial bearing 3 are arranged more densely, and the guide bars at the position corresponding to the outer ring of the bearing seat can be arranged more sparsely.

[0034] The front axial bearing seat 41 and / or the rear axial bearing seat 42 are configured with a mounting groove 6, and the first heat pipe 51 is installed in the mounting groove 6 to ensure the position reliability and stability of the first heat pipe 51. It can be understood that the first heat pipe 51 should be able to form contact with the axial bearing 3.

[0035] According to an embodiment of the present invention, there is further provided a motor, comprising the above-mentioned air suspension bearing assembly, wherein the motor further comprises a housing 102, wherein a cooling channel 101 is constructed in the housing 102, and heat exchange is formed between one end of the heat pipe and the cooling channel 101. In this way, there is no need to construct corresponding cooling channels on the front end cover 21 and the rear end cover 22, and the heat exchange between the coolant in the cooling channel 101 on the housing 102 and the heat conductive member is utilized to take away the heat at the air suspension bearing, thereby improving the overall reliability of the equipment.

[0036] According to an embodiment of the present invention, there is also provided an air compressor, comprising the above-mentioned motor.

[0037] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. An air bearing assembly, characterized in that: The invention comprises a bearing seat and an air suspension bearing connected to the bearing seat, a heat conducting member is sandwiched between the bearing seat and the air suspension bearing, and the heat conducting member can conduct heat generated by wind grinding at the air suspension bearing to the bearing seat; the heat conducting member comprises a plurality of heat conducting members, and the plurality of heat conducting members are evenly spaced along the circumference of the air suspension bearing; the air suspension bearing is an axial bearing (3), and the bearing seat is one of a front axial bearing seat (41) and a rear axial bearing seat (42); the heat conducting member comprises a first heat pipe (51), a first end of the first heat pipe (51) is in contact with an inner ring of the axial bearing (3), and a second end of the first heat pipe (51) is in contact with an outer ring of the front axial bearing seat (41) or the rear axial bearing seat (42).

2. The air bearing assembly according to claim 1, characterized in that: The space formed by the air suspension bearing and the bearing seat and the space outside the heat conductive member are filled with heat conductive glue.

3. The air bearing assembly according to claim 2, characterized in that: The thermal conductive adhesive is epoxy resin.

4. The air bearing assembly according to claim 1, characterized in that: The air suspension bearing is a radial bearing (1), and the bearing seat is one of a front end cover (21) and a rear end cover (22) of the motor.

5. The air bearing assembly according to claim 1, characterized in that: The front axial bearing seat (41) and / or the rear axial bearing seat (42) are provided with a mounting groove (6), and the first heat pipe (51) is installed in the mounting groove (6).

6. A motor, characterized in that: An air suspension bearing assembly comprising any one of claims 1 to 5.

7. The motor according to claim 6, characterized in that It also comprises a casing (102), wherein a cooling channel (101) is configured in the casing (102), and heat exchange is formed between one end of the heat conducting element and the cooling channel (101).

8. An air compressor, characterized in that: Comprising the motor as claimed in claim 7.

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