CN114189093A - Air suspension motor cooling structure and air suspension motor - Google Patents
Air suspension motor cooling structure and air suspension motor Download PDFInfo
- Publication number
- CN114189093A CN114189093A CN202111502327.5A CN202111502327A CN114189093A CN 114189093 A CN114189093 A CN 114189093A CN 202111502327 A CN202111502327 A CN 202111502327A CN 114189093 A CN114189093 A CN 114189093A
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- Prior art keywords
- bearing
- air flow
- air
- end cover
- flow passage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/163—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at only one end of the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention provides a cooling structure of an air suspension motor and the air suspension motor, wherein the cooling structure of the air suspension motor comprises a front end cover assembly, a bearing chamber is constructed in the front end cover assembly, an axial air suspension bearing is arranged in the bearing chamber, the axial air suspension bearing comprises a front axial bearing and a rear axial bearing which are oppositely arranged, a thrust disc is clamped between the front axial bearing and the rear axial bearing, and a plurality of sawteeth are arranged on the outer circumferential wall of the thrust disc. According to the invention, the thrust disc can greatly accelerate the air flow in the bearing chamber through the sawteeth, the wind friction loss heat of the bearing chamber is transferred out for heat dissipation, and the rotating structure of the thrust disc can extrude the gas at the edge of the bearing to generate pressure gas in the high-speed operation process, so that the leakage of the gas along the edge of the thrust disc is reduced, and the stable operation of the axial gas suspension bearing is facilitated.
Description
Technical Field
The invention belongs to the technical field of motor design, and particularly relates to a cooling structure of an air suspension motor and the air suspension motor.
Background
The air suspension high-speed permanent magnet synchronous motor has the advantages of small volume, high rotating speed and high power density, and is widely applied to actual industry. The gas suspension high-speed permanent magnet synchronous motor structurally comprises: the air bearing comprises a front axial bearing stator, a rear axial bearing stator, a front radial bearing stator and a rear radial bearing stator, and the rotor comprises a rotating shaft and a thrust plate. In the high-speed rotation process of the motor, the rotor-thrust plate rubs with air to generate wind friction loss, a large amount of heat is accumulated in the bearing chamber, the cooling speed of the bearing chamber is slow, the axial bearing is likely to expand and deform due to overhigh temperature, the actual working clearance is reduced, the operation is unstable or the phenomenon of direct locking is caused, and the aging life of key parts such as a stator winding, a radial bearing and the like is reduced, even the key parts are invalid and scrapped due to overhigh temperature. Therefore, the realization of the efficient cooling of the bearing chamber and the whole machine of the high-speed motor is very important.
At present, the common cooling modes for the bearing chamber comprise a water cooling mode and an air cooling mode.
The water cooling mode is that a water cooling channel structure is added outside the bearing chamber, the cooling water channel is connected with a water cooling machine shell flow channel in series, and cooling is continuously carried out on the bearing chamber through cooling circulating water. The cooling water has high mass heat capacity and heat conductivity coefficient, and can effectively take away a large amount of heat through forced convection heat dissipation, but the bearing chamber has an air gap space, the air heat conductivity coefficient is very low, the air flow is slow, the heat generated by the high-speed motion of the rotor-thrust plate can not be quickly and effectively conducted to the motor shell, the temperature cooling speed of the bearing chamber is slow, and the final cooling effect is poor.
The forced air cooling mode is to introduce outside air supply device, forces high-pressure cooling gas to the bearing room, drives the circulation of air of bearing room and then takes away the heat, can be taking away the heat of bearing room by a wide margin, but this kind of forced air cooling mode introduces outside air supply and can lead to motor structure more complicated, and the design increases with the manufacturing difficulty, and the cost also can increase. After an external air source is introduced, a part of impurities may be brought into a cavity of the motor, and the precision parts in the motor can be damaged or even destroyed.
Disclosure of Invention
Therefore, the invention provides a cooling structure of a gas suspension motor and the gas suspension motor, which can overcome the defects that in the prior art, the pure water cooling heat conduction efficiency is low, the motor structure is complicated due to forced air cooling, and external impurities are introduced.
In order to solve the above problems, the present invention provides an air suspension motor cooling structure, which includes a front end cover assembly, a bearing chamber is configured in the front end cover assembly, an axial air suspension bearing is disposed in the bearing chamber, the axial air suspension bearing includes a front axial bearing and a rear axial bearing which are oppositely disposed, a thrust plate is interposed between the front axial bearing and the rear axial bearing, and an outer circumferential wall of the thrust plate has a plurality of serrations.
In some embodiments, the plurality of saw teeth are uniformly spaced along the circumferential direction of the thrust disk, and an included angle formed between two adjacent saw teeth is between 30 ° and 60 °.
In some embodiments, a first air flow passage is further configured in the front end cover assembly, and the air flow driven by the thrust disk can enter an inner cavity of the motor through the first air flow passage.
In some embodiments, a first cooling water flow passage is also configured within the front end cover assembly, the first cooling water flow passage being disposed adjacent to the first air flow passage.
In some embodiments, a first air flow passage is further configured in the front end cover assembly, and air flow driven by the thrust disk can enter a second air flow passage in a casing of the motor through the first air flow passage.
In some embodiments, a second cooling water flow passage is provided in the housing, the second air flow passage is disposed adjacent to the second cooling water flow passage at a distance, and the second air flow passage has an air outlet facing the axial end of the winding.
In some embodiments, when a first cooling water flow passage is included, the first cooling water flow passage communicates with the second cooling water flow passage.
In some embodiments, the front end cover assembly includes a front end cover and a bearing chamber housing disposed opposite thereto, the bearing chamber housing being sandwiched with the front end cover to form the bearing chamber.
In some embodiments, the front end cap is further configured with a third air flow passage in communication with the first air flow passage, an outlet of the third air flow passage being opposite the front radial bearing; and/or the motor is provided with a rear end cover which is provided with a fourth air flow channel communicated with the second air flow channel, and the outlet of the fourth air flow channel is opposite to the rear radial bearing.
The invention also provides an air suspension motor which comprises the air suspension motor cooling structure.
According to the air suspension motor cooling structure and the air suspension motor, when the rotor rotates, the thrust disc can greatly accelerate air flow in the bearing chamber through the sawteeth, wind friction loss heat of the bearing chamber is transferred out for heat dissipation, the rotating structure of the thrust disc can extrude gas at the edge of the bearing to generate pressure gas in the high-speed operation process, leakage of the gas along the edge of the thrust disc is reduced, and stable operation of the axial air suspension bearing is facilitated.
Drawings
Fig. 1 is a schematic view of an internal structure of a cooling structure of an air suspension motor according to an embodiment of the present invention, in which a second cooling water flow passage is not shown and is provided in a housing, and the second cooling water flow passage extends in a serpentine shape;
FIG. 2 is a schematic structural view (axial projection) of the thrust plate of FIG. 1;
FIG. 3 is another schematic structural view (axial projection) of the thrust plate of FIG. 1;
fig. 4 is a partial structural schematic view of a cooling structure of an air-levitation motor according to another embodiment of the present invention, in which a second cooling water channel extending spirally is disposed in a casing.
The reference numerals are represented as:
101. a front axial bearing; 102. a thrust plate; 103. a rear axial bearing; 104. a seal ring; 105. a rotor; 106. a bearing chamber housing; 107. a front end cover; 108. a winding axial end portion; 109. a stator core; 110. a housing; 111. a rear end cap; 112. a first air flow passage; 113. a second airflow channel; 114. a first cooling water flow passage; 115. a second cooling water flow passage; 116. a third airflow channel; 117. a fourth airflow path; 200. and (4) saw teeth.
Detailed Description
Referring to fig. 1 to 4 in combination, according to an embodiment of the present invention, there is provided an air-levitation motor cooling structure, including a front end cover assembly, a bearing chamber is configured in the front end cover assembly, an axial air-levitation bearing is disposed in the bearing chamber, the axial air-levitation bearing includes a front axial bearing 101 and a rear axial bearing 103 which are disposed oppositely, a thrust disk 102 is interposed between the front axial bearing 101 and the rear axial bearing 103, an outer circumferential wall of the thrust disk 102 has a plurality of serrations 200, and the thrust disk 102 is sleeved on a rotor 105. In this technical scheme, when the rotor 105 rotates, the thrust disk 102 can greatly accelerate the air flow in the bearing chamber through the saw teeth 200, and the wind friction heat of the bearing chamber is transferred out for heat dissipation, and the rotating structure of the thrust disk 102 can extrude the gas at the edge of the bearing to generate pressure gas in the high-speed operation process, so that the leakage of the gas along the edge of the thrust disk is reduced, and the stable operation of the axial gas suspension bearing is facilitated.
The structure of the saw teeth 200 may be various, and in theory, the saw teeth may be a tooth shape capable of driving the air flow in the bearing chamber where the saw teeth 200 are located when rotating, in some specific embodiments, as shown in fig. 2 and fig. 3, the plurality of saw teeth 200 are uniformly spaced along the circumferential direction of the thrust plate 102, and an included angle (α or β) formed between two adjacent saw teeth 200 is between 30 ° and 60 °, and when the included angle is within the angle range, the saw teeth 200 can more easily drive the ambient air to move, and as the thrust plate 102 rotates, the ambient air is driven to rotate, so that the air flow in the bearing chamber is greatly accelerated to dissipate heat.
In one embodiment, a first air flow passage 112 is further configured in the front end cover assembly, and air flow driven by the thrust disk 102 can enter an inner cavity of the motor through the first air flow passage 112 so as to form air flow heat dissipation for a stator core 109, windings and the like in the motor. Preferably, a first cooling water channel 114 is further configured in the front end cover assembly, and the first cooling water channel 114 is disposed adjacent to the first air flow channel 112, so that the cooling water in the first cooling water channel 114 can be used to cool and dissipate the air flow in the first air flow channel 112, thereby facilitating the heat dissipation of the internal components of the casing 110 by the air flow. As shown in fig. 4, the gas outlet of the first gas flow channel 112 is preferably aligned with the winding axial end 108, specifically the outlet end of the winding, and it is worth mentioning that the coil temperature of the outlet end is 1.5-2 times of the temperature of the non-outlet end.
In another embodiment, a first air flow channel 112 is further configured in the front end cover assembly, and the air flow driven by the thrust plate 102 can enter a second air flow channel 113 provided in a casing 110 of the electric machine through the first air flow channel 112, that is, a second air flow channel 113 communicated with the first air flow channel 112 is configured in the casing 110, in this case, preferably, a second cooling water flow channel 115 is provided in the casing 110, the second air flow channel 113 is disposed in a spaced and adjacent manner with respect to the second cooling water flow channel 115, and the second air flow channel 113 has an air outlet facing the winding axial end 108 (including an outlet end and a non-outlet end), so that the second cooling water flow channel 115 can be utilized to exchange heat with the air flow in the second air flow channel 113, and thus the cooling efficiency of the air flow to the winding axial end 108 can be improved.
Furthermore, when the first cooling water channel 114 is included, and the first cooling water channel 114 is communicated with the second cooling water channel 115, a uniform cooling water source can be used to cool the motor.
The front end cover assembly comprises a front end cover 107 and a bearing chamber shell 106 arranged opposite to the front end cover 107, the bearing chamber shell 106 and the front end cover 107 are clamped to form the bearing chamber, the corresponding bearing chamber is formed in an assembling mode, and the forming difficulty of the bearing chamber is reduced. In some embodiments, the front end cover 107 is further configured with a third air flow channel 116 communicated with the first air flow channel 112, and an outlet of the third air flow channel 116 is opposite to the front radial bearing; and/or, a fourth air flow channel 117 communicated with the second air flow channel 113 is formed on the rear end cover 111 of the motor, an outlet of the fourth air flow channel 117 is opposite to a rear radial bearing, and efficient cooling can be formed on the radial bearings (not shown in the figure) at the front end cover 107 and the rear end cover 111 respectively.
The specific type of the second cooling water flow channel 114 may be various, for example, it may be a serpentine structure extending along the axial direction of the motor or a spiral structure extending around the rotating shaft of the motor, and the extending direction of the second air flow channel 113 may be consistent with the extending direction of the second cooling water flow channel 114, so that the two channels can be as close as possible to ensure the heat exchange cooling efficiency.
The motor in the technical scheme of the invention has simple structure, can greatly reduce the temperature of the bearing chamber, synchronously cools the temperature of the stator winding coil, solves the problem that the bearing chamber and the stator coil of the air suspension high-speed motor are difficult to cool, realizes higher power density and prolongs the service life of the motor.
According to an embodiment of the present invention, there is also provided an air levitation motor including the above air levitation motor cooling structure.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a gas suspension motor cooling structure, its characterized in that, includes the front end housing assembly, be constructed with the bearing room in the front end housing assembly, be provided with axial gas suspension bearing in the bearing room, axial gas suspension bearing is including relative preceding axial bearing (101) and back axial bearing (103) that set up, preceding axial bearing (101) with it is equipped with thrust disc (102) to press from both sides between back axial bearing (103), have a plurality of sawtooth (200) on the outer circumferential wall of thrust disc (102).
2. The air suspension motor cooling structure as claimed in claim 1, wherein the plurality of saw teeth (200) are uniformly spaced along the circumferential direction of the thrust disk (102), and an included angle formed between two adjacent saw teeth (200) is between 30 ° and 60 °.
3. The aero-levitation motor cooling structure as claimed in claim 1, wherein a first air flow passage (112) is further configured in the front end cover assembly, and air flow driven by the thrust disk (102) can enter an inner cavity of the motor through the first air flow passage (112).
4. The aero-levitation motor cooling structure as claimed in claim 3, wherein a first cooling water flow passage (114) is further configured in the front end cover assembly, the first cooling water flow passage (114) being disposed adjacent to the first air flow passage (112).
5. The aero-levitation motor cooling structure as claimed in claim 1, wherein a first air flow passage (112) is further configured in the front end cover assembly, and air flow driven by the thrust disk (102) can enter a second air flow passage (113) provided in a casing (110) of a motor through the first air flow passage (112).
6. The air-suspension motor cooling structure as claimed in claim 5, wherein a second cooling water flow channel (115) is provided in the housing (110), the second air flow channel (113) is disposed adjacent to the second cooling water flow channel (115) at a distance, and the second air flow channel (113) has an air outlet facing the winding axial end (108).
7. The aero-levitation motor cooling structure as claimed in any one of claims 3 to 6, wherein when comprising a first cooling water flow passage (114), the first cooling water flow passage (114) communicates with the second cooling water flow passage (115).
8. The air-suspension motor cooling structure according to claim 5, characterized in that the front end cover assembly comprises a front end cover (107) and a bearing chamber housing (106) arranged opposite to the front end cover, and the bearing chamber housing (106) and the front end cover (107) are clamped to form the bearing chamber.
9. The aero-levitation motor cooling structure according to claim 8, wherein the front end cover (107) is further configured with a third air flow channel (116) communicated with the first air flow channel (112), an outlet of the third air flow channel (116) is opposite to a front radial bearing; and/or the motor is provided with a rear end cover (111) which is provided with a fourth air flow channel (117) communicated with the second air flow channel (113), and the outlet of the fourth air flow channel (117) is opposite to the rear radial bearing.
10. An air levitation motor comprising the air levitation motor cooling structure as recited in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111502327.5A CN114189093B (en) | 2021-12-09 | 2021-12-09 | Air suspension motor cooling structure and air suspension motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111502327.5A CN114189093B (en) | 2021-12-09 | 2021-12-09 | Air suspension motor cooling structure and air suspension motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114189093A true CN114189093A (en) | 2022-03-15 |
| CN114189093B CN114189093B (en) | 2023-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111502327.5A Active CN114189093B (en) | 2021-12-09 | 2021-12-09 | Air suspension motor cooling structure and air suspension motor |
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| Country | Link |
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| CN (1) | CN114189093B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07123636A (en) * | 1993-10-29 | 1995-05-12 | Meidensha Corp | Retarder in vehicle |
| EP1496602A2 (en) * | 2003-07-07 | 2005-01-12 | Robert Bosch Gmbh | Thrust washer for an electric machine with sliding-contact bearing |
| CN201319537Y (en) * | 2008-12-10 | 2009-09-30 | 抚顺煤矿电机制造有限责任公司 | Water-cooling structure of motor |
| CN209781245U (en) * | 2019-08-29 | 2019-12-13 | 势加透博洁净动力如皋有限公司 | Shell assembly of two-stage air suspension centrifugal electric direct-drive air compressor |
| CN110868002A (en) * | 2019-12-25 | 2020-03-06 | 苏州保邦电气有限公司 | Novel integrated water cooling system of high-speed permanent magnet motor |
| CN113027819A (en) * | 2021-04-26 | 2021-06-25 | 山东明天机械集团股份有限公司 | Active air cooling system and air cooling method of magnetic suspension centrifugal blower |
| CN113323908A (en) * | 2021-07-20 | 2021-08-31 | 珠海格力电器股份有限公司 | Air compressor machine, air conditioner and car |
-
2021
- 2021-12-09 CN CN202111502327.5A patent/CN114189093B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07123636A (en) * | 1993-10-29 | 1995-05-12 | Meidensha Corp | Retarder in vehicle |
| EP1496602A2 (en) * | 2003-07-07 | 2005-01-12 | Robert Bosch Gmbh | Thrust washer for an electric machine with sliding-contact bearing |
| CN201319537Y (en) * | 2008-12-10 | 2009-09-30 | 抚顺煤矿电机制造有限责任公司 | Water-cooling structure of motor |
| CN209781245U (en) * | 2019-08-29 | 2019-12-13 | 势加透博洁净动力如皋有限公司 | Shell assembly of two-stage air suspension centrifugal electric direct-drive air compressor |
| CN110868002A (en) * | 2019-12-25 | 2020-03-06 | 苏州保邦电气有限公司 | Novel integrated water cooling system of high-speed permanent magnet motor |
| CN113027819A (en) * | 2021-04-26 | 2021-06-25 | 山东明天机械集团股份有限公司 | Active air cooling system and air cooling method of magnetic suspension centrifugal blower |
| CN113323908A (en) * | 2021-07-20 | 2021-08-31 | 珠海格力电器股份有限公司 | Air compressor machine, air conditioner and car |
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| Publication number | Publication date |
|---|---|
| CN114189093B (en) | 2023-08-01 |
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