CN218124458U - Motor and compressor - Google Patents
Motor and compressor Download PDFInfo
- Publication number
- CN218124458U CN218124458U CN202222262550.3U CN202222262550U CN218124458U CN 218124458 U CN218124458 U CN 218124458U CN 202222262550 U CN202222262550 U CN 202222262550U CN 218124458 U CN218124458 U CN 218124458U
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- Prior art keywords
- bearing
- gas
- outer ring
- rotating shaft
- electric machine
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- 230000008093 supporting effect Effects 0.000 claims abstract description 5
- 230000002706 hydrostatic effect Effects 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000001687 destabilization Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The utility model provides a motor and compressor. The motor includes a housing; the rotating shaft is rotatably arranged in the shell; the gas bearing is arranged on the shell and used for supporting the rotating shaft; the gas bearing comprises an outer ring and at least two pads, wherein all the pads are distributed in the outer ring in an annular mode, and the pads are movably connected to the outer ring. The utility model provides a motor and compressor can remove for the outer lane through making the tile for the tile can remove along with the offset that the pivot produced, thereby changes the change of changeing epaxial gas film pressure distribution, keeps the axis of pivot in the position of settlement, and then avoids the rotor unstability of motor, improves the stability of motor.
Description
Technical Field
The utility model relates to a drive arrangement technical field, especially a motor and compressor.
Background
The gas lubrication hydrostatic bearing is mainly used in low-speed heavy-load working conditions, when the gas lubrication hydrostatic bearing is applied to a motor in a steam compressor, the gas lubrication hydrostatic bearing can meet the load and rigidity requirements of the steam compressor, but when a rotating shaft runs at a high speed, air film vortex motion can be generated, and the hydrostatic bearing can generate stronger subsynchronous vibration at the moment, so that a rotor of the motor generates a destabilization phenomenon, and the stability of the motor is influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem that the stability of a rotating shaft is influenced by the synchronous vibration of a bearing in the prior art, the motor and the compressor which are capable of adjusting the pressure distribution of an air film by the aid of the movable pads and increase the stability of the motor are provided.
An electric machine comprising:
a housing;
the rotating shaft is rotatably arranged in the shell;
the gas bearing is arranged on the shell and used for supporting the rotating shaft;
the gas bearing comprises an outer ring and at least two pads, wherein all the pads are annularly distributed in the outer ring, and the pads are movably connected to the outer ring.
The tile is characterized in that a deformation structure is arranged between the tile and the outer ring, and the deformation structure can deform to drive the tile to move.
The deformation structure comprises a spring, one end of the spring is connected to the tile, and the other end of the spring is connected to the outer ring.
The deformation structure comprises at least two springs, and all the springs are uniformly distributed between the tile and the outer ring.
The spring is one or more of a cylindrical spiral spring, a truncated cone spiral spring or an annular spring.
The rotating shaft is provided with a rotor section and a bearing section, the gas bearing is positioned at the bearing section, and the relationship between the diameter d1 of the bearing section and the diameter d2 of the rotor section is that d2 is more than or equal to 20mm and d1 is more than or equal to 50mm.
The rotating shaft is provided with a rotor section and a bearing section, the gas bearing is positioned at the bearing section, and the relation between the length L of the bearing section and the diameter d1 of the bearing section is that L/d1 is more than or equal to 1 and less than or equal to 1.5.
And an air inlet is arranged on the outer ring, and an air film is formed between the tile and the rotating shaft by airflow entering from the air inlet.
The shell is provided with an air inlet flow channel, one end of the air inlet flow channel is communicated with the air inlet, and the other end of the air inlet flow channel is communicated with the air supply structure.
The motor further comprises a bearing seat, the bearing seat is arranged on the shell, the outer ring is arranged on the bearing seat, and the air inlet flow channel is formed in the bearing seat.
A compressor comprises the motor.
The utility model provides a motor and compressor can remove for the outer lane through making the tile for the tile can remove along with the offset that the pivot produced, thereby changes the change of changeing epaxial gas film pressure distribution, keeps the axis of pivot in the position of settlement, and then avoids the rotor unstability of motor, improves the stability of motor.
Drawings
Fig. 1 is a schematic structural diagram of a gas bearing according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a motor according to an embodiment of the present invention;
FIG. 3 is a schematic view of a portion of FIG. 2 at A;
in the figure:
1. a housing; 2. a rotating shaft; 3. a gas bearing; 31. an outer ring; 32. a tile; 33. deformation structure; 21. a rotor section; 22. a bearing section; 4. and a bearing seat.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The motor shown in fig. 1 to 3 includes: a housing 1; the rotating shaft 2 is rotatably arranged in the shell 1; the gas bearing 3 is arranged on the shell 1, and the gas bearing 3 is used for supporting the rotating shaft 2; the gas bearing 3 comprises an outer ring 31 and at least two pads 32, wherein all the pads 32 are annularly distributed in the outer ring 31, and the pads 32 are movably connected to the outer ring 31. The pad 32 can move for outer lane 31 for the pad 32 can move along with the offset that pivot 2 produced, thereby changes the change of the air film pressure distribution on pivot 2, keeps the axis of pivot 2 in the position of settlement, and then avoids the rotor unstability of motor, improves the stability of motor.
When the motor works, an air film is formed between the tile 32 and the rotating shaft 2, the rotating shaft 2 is supported by the air film, when the axis of the rotating shaft 2 is located at a set position, the rotating shaft 2 can normally rotate at the moment, and the pressure of the air film around the rotating shaft 2 is uniformly distributed. When the rotating shaft 2 vibrates, the pressure distribution of the air film between the pad 32 and the rotating shaft 2 changes, the air film with high pressure moves the rotating shaft 2 to the air film with low pressure, and finally the axis of the rotating shaft 2 is restored to the set position, so that the instability of the rotating shaft 2 and the structure connected to the rotating shaft 2 is avoided, and the reliability of the motor is ensured.
Wherein, be provided with deformation structure 33 between the tile 32 with the outer lane 31, deformation structure 33 can produce deformation in order to drive tile 32 removes. When the pressure distribution of the air film changes, different extrusion forces are generated on the tile 32, and under the action of the extrusion forces, the deformation structure 33 deforms correspondingly, so that the purpose of moving the tile 32 is achieved.
Preferably, the deformation structure 33 comprises a spring, one end of which is connected to the pad 32 and the other end of which is connected to the outer ring 31. Since the spring has a tendency to return to its original shape when it is compressed or stretched, the spring can be compressed or stretched when the pad 32 is displaced, and gradually returns to its original shape when the pressure distribution of the air film is gradually uniform, eventually keeping the pressure distribution of the air film uniform.
The deformation structure 33 comprises at least two springs, and all the springs are uniformly distributed between the pad 32 and the outer ring 31. The pads 32 are supported in multiple points by the springs, so that the moving precision of the pads 32 is ensured, and the adjusting precision of air film pressure distribution is ensured.
Optionally, the spring is one or more of a cylindrical coil spring, a truncated cone coil spring or an annular spring.
The rotating shaft 2 is provided with a rotor section 21 and a bearing section 22, the gas bearing 3 is located at the bearing section 22, and the rotor of the motor is arranged at the rotor section 21. In order to increase the critical rotational speed of the rotor shaft 2 as much as possible, it is possible to choose to reduce the axial length of the rotor shaft 2 as much as possible, for which purpose the diameter d1 of the bearing section 22 has a relationship of 20mm < d2-d1 < 50mm with the diameter d2 of the rotor section 21. At this moment, the bearing can be close to the space between the stator of the motor and the rotating shaft 2 as much as possible, even part of the bearing can be positioned in the space between the stator of the motor and the rotating shaft 2, so that the space between the stator and the rotating shaft 2 can be reasonably utilized, the axial length of the rotating shaft 2 is further shortened, the critical rotating speed is reliably improved, and the working efficiency of the motor is increased.
In another embodiment, the rotating shaft 2 is provided with a rotor section 21 and a bearing section 22, the gas bearing 3 is located at the bearing section 22, and the relationship between the length L of the bearing section 22 and the diameter d1 of the bearing section 22 is 1 ≦ L/d1 ≦ 1.5.L/d1 is the length-diameter ratio of the bearing section 22, and when the length-diameter ratio is between 1 and 1.5, the bearing section 22 can ensure the bearing and rigidity requirements of the gas bearing 3. When the numerical value of draw ratio was too little, the axial dimensions undersize of the gas bearing 3 that can set up in bearing section 22 department can't guarantee the reliable support to pivot 2, and when the numerical value of draw ratio was too big, the axial dimensions of pivot 2 can't reliably be shortened, influences the critical speed of pivot 2.
Gas bearing 3 needs the air feed structure to supply gas in order to form the gas film and support, consequently, be provided with the air inlet on the outer lane 31, the air current that the air inlet got into is in tile 32 with form the gas film between the pivot 2, guarantee gas bearing 3's supporting effect.
Specifically, the casing 1 is provided with an air inlet flow channel, one end of the air inlet flow channel is communicated with the air inlet, and the other end of the air inlet flow channel is communicated with the air supply structure. High-pressure gas supplied from a gas supply structure is introduced between the pad 32 and the shaft 2 by means of the gas inlet flow passage to form a gas film.
The air supply structure can be a stable air source on site or a stable air source formed by an air compressor and a cooler.
The motor further comprises a bearing seat 4, the bearing seat 4 is arranged on the shell 1, the outer ring 31 is arranged on the bearing seat 4, and the inlet air flow channel is formed in the bearing seat 4. Utilize bearing frame 4 to support gas bearing 3, simultaneously through processing the air inlet channel on bearing frame 4, make things convenient for the gas that the air feed structure provided to get into and support in gas bearing 3.
A compressor comprises the motor.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (11)
1. An electric machine characterized by: the method comprises the following steps:
a rotating shaft (2);
a gas bearing (3), the gas bearing (3) being for supporting the rotating shaft (2);
the gas bearing (3) comprises an outer ring (31) and at least two pads (32), wherein all the pads (32) are annularly distributed in the outer ring (31), and the pads (32) are movably connected to the outer ring (31).
2. The electric machine of claim 1, wherein: the tile piece (32) and be provided with deformation structure (33) between outer lane (31), deformation structure (33) can produce deformation in order to drive tile piece (32) remove.
3. The electric machine of claim 2, wherein: the deformation structure (33) comprises a spring, one end of the spring is connected to the pad (32), and the other end of the spring is connected to the outer ring (31).
4. The electric machine of claim 3, wherein: the deformation structure (33) comprises at least two springs, and all the springs are uniformly distributed between the pad (32) and the outer ring (31).
5. The electric machine of claim 3, wherein: the spring is one or more of a cylindrical spiral spring, a truncated cone spiral spring or an annular spring.
6. The electric machine of claim 1, wherein: the gas bearing is characterized in that a rotor section (21) and a bearing section (22) are arranged on the rotating shaft (2), the gas bearing (3) is located at the bearing section (22), and the relation between the diameter d1 of the bearing section (22) and the diameter d2 of the rotor section (21) is that d2-d1 is more than or equal to 20mm and less than or equal to 50mm.
7. The electric machine of claim 1, wherein: the gas bearing is characterized in that a rotor section (21) and a bearing section (22) are arranged on the rotating shaft (2), the gas bearing (3) is positioned at the bearing section (22), and the relation between the length L of the bearing section (22) and the diameter d1 of the bearing section (22) is that L/d1 is more than or equal to 1 and less than or equal to 1.5.
8. The electric machine of claim 1, wherein: an air inlet is formed in the outer ring (31), and an air film is formed between the tile (32) and the rotating shaft (2) by airflow entering from the air inlet.
9. The electric machine of claim 8, wherein: the motor further comprises a shell (1), the gas bearing (3) is arranged in the shell (1), a gas inlet flow channel is arranged on the shell (1), one end of the gas inlet flow channel is communicated with the gas inlet, and the other end of the gas inlet flow channel is communicated with the gas supply structure.
10. The electric machine of claim 9, wherein: the motor further comprises a bearing seat (4), the bearing seat (4) is arranged on the shell (1), the outer ring (31) is arranged on the bearing seat (4), and the bearing seat (4) is provided with the air inlet flow channel.
11. A compressor, characterized by: comprising an electrical machine according to any of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222262550.3U CN218124458U (en) | 2022-08-26 | 2022-08-26 | Motor and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222262550.3U CN218124458U (en) | 2022-08-26 | 2022-08-26 | Motor and compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218124458U true CN218124458U (en) | 2022-12-23 |
Family
ID=84529027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222262550.3U Active CN218124458U (en) | 2022-08-26 | 2022-08-26 | Motor and compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218124458U (en) |
-
2022
- 2022-08-26 CN CN202222262550.3U patent/CN218124458U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231122 Address after: 519070, 1st Floor, Building 7, No. 789 Jinji Road, Qianshan, Zhuhai, Guangdong Province Patentee after: Zhuhai Gree Green Control Technology Co.,Ltd. Address before: 519070 No. six Jinji Road West, Zhuhai, Guangdong Patentee before: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI |
|
| TR01 | Transfer of patent right |