High-speed oil cooling motor capable of cooling bearing
By designing cooling channels for the front and rear bearings in the aircraft motor, effective cooling of the bearings is achieved, coolant leakage is avoided, the system structure is simplified, reliability is improved, and costs are reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-03-24
AI Technical Summary
Existing bearing cooling systems for aircraft motors pose a risk of leakage, increasing system complexity and cost, and failing to meet the requirements of high-speed and high-temperature environments.
The design incorporates front and rear bearing cooling channels. The coolant flows sequentially through these channels via the casing to cool the bearings, avoiding direct contact with the coolant. Grease lubrication or lifetime lubrication sealing is used for the bearings, simplifying the system structure.
Effective cooling of the bearings reduces the risk of leakage, simplifies the system, improves reliability, and reduces costs.
Smart Images
Figure CN224037185U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor technical field especially relates to a high -speed oil cooling motor of bearing cooling. BACKGROUND
[0002] Motor is a kind of equipment to convert electric energy into mechanical energy.Motor is mainly composed of stator, rotor and bearing, bearing is installed between rotor and stator, supports the rotating shaft of rotor, so that rotor can rotate smoothly, guarantees the relative motion precision between rotor and stator, and bearing is the key component of motor stable operation.Motor is usually provided with front bearing and rear bearing, and is located at the front end and rear end of motor respectively.Bearing as the key component of motor, its working state directly influences the overall performance and reliability of equipment.Bearing generates heat in the process of running due to friction and other factors, if heat cannot be effectively dissipated, it will lead to bearing temperature rise, and then cause a series of problems.Therefore, reasonable bearing heat dissipation mode is crucial.In related technology, the performance requirement of motor in some fields is not high, and the heat dissipation structure of bearing is not designed, but in the field of aviation electrification, aviation motor is usually used circulating oil lubrication or oil-air lubrication system to meet the technical requirement of high speed.The circulating oil lubrication is directly sprayed to bearing by using high-speed oil jet to achieve the effect of cooling and lubricating bearing.The oil-air lubrication system uses compressed air jet containing oil droplets to spray to bearing, wherein oil droplets play a lubricating role, and compressed air plays a cooling role.In the two schemes, cooling medium needs to enter bearing cavity and directly contact with bearing, there is a risk of leakage, so the bearing cavity has higher sealing requirement, and high-speed oil seal needs to be arranged at both ends of bearing cavity, and auxiliary system is arranged outside motor to provide required function, which not only increases the overall quality of system, but also increases the complexity and cost of system.
[0003] In the prior art, in order to meet the technical requirement of high speed, aviation motor usually uses circulating oil lubrication or oil-air lubrication system.Circulating oil lubrication is directly sprayed to bearing by using high-speed oil jet to achieve the effect of cooling and lubricating bearing.The oil-air lubrication system uses compressed air jet containing oil droplets to spray to bearing, wherein oil droplets play a lubricating role, and compressed air plays a cooling role.In the two schemes, cooling medium needs to enter bearing cavity and directly contact with bearing, there is a risk of leakage, so the bearing cavity has higher sealing requirement, and high-speed oil seal needs to be arranged at both ends of bearing cavity, and auxiliary system is arranged outside motor to provide required function, which not only increases the overall quality of system, but also increases the complexity and cost of system.
[0004] Therefore, the utility model is provided. UTILITY MODEL CONTENT
[0005] To solve one of the above technical problems, the utility model provides a high-speed oil cooling motor capable of cooling bearing.
[0006] The utility model adopts the following technical scheme:
[0007] A high-speed oil cooling motor capable of cooling bearing, comprising:
[0008] Cylinder shell, cylinder shell passage is arranged on the cylinder shell;
[0009] A front end cover is arranged at one end of the cylinder shell along the length direction, and a front bearing cooling channel is arranged on the front end cover and is communicated with the cylinder shell channel;
[0010] A rear end cover is arranged at the other end of the cylinder shell along the length direction, and a rear bearing cooling channel is arranged on the rear end cover and is communicated with the cylinder shell channel.
[0011] Optionally, a front bearing cavity is arranged in the middle of the front end cover, and the front bearing cooling channel extends along the circumference of the front bearing cavity;
[0012] A rear bearing cavity is arranged in the middle of the rear end cover, and the rear bearing cooling channel extends along the circumference of the rear bearing cavity.
[0013] Optionally, the front bearing cooling channel comprises a plurality of first annular channels, each of which is arranged in the thickness direction of the front end cover in sequence, each of which is located outside the front bearing cavity, and each of which is connected to the cylinder shell channel in parallel or communicated in sequence.
[0014] Optionally, the cross section of the first annular channel is rectangular, and the width direction of the rectangle is in the same direction as the thickness direction of the front end cover.
[0015] Optionally, the rear bearing cooling channel comprises a plurality of second annular channels, each of which is arranged in the thickness direction of the rear end cover in sequence, each of which is located outside the rear bearing cavity, and each of which is connected to the cylinder shell channel in parallel or communicated in sequence.
[0016] Optionally, a front end liquid inlet channel is arranged on the front end cover, the front end liquid inlet channel extends in the radial direction of the front end cover, and the front end liquid inlet channel is communicated with the front bearing cooling channel;
[0017] A cooling oil inlet communicated with the front end liquid inlet channel is arranged on the front end cover or the cylinder shell.
[0018] Optionally, a rear end liquid inlet channel is arranged on the rear end cover, the rear end liquid inlet channel extends in the radial direction of the rear end cover, and the rear end liquid inlet channel is communicated with the cylinder shell channel and the rear bearing cooling channel at both ends respectively.
[0019] Optionally, the high-speed oil-cooled motor capable of cooling the bearing comprises a stator arranged inside the cylinder shell;
[0020] A stator cooling channel is arranged on the stator;
[0021] The stator cooling channel extends along the length direction of the cylinder shell.
[0022] The stator cooling channel communicates with the rear bearing cooling channel.
[0023] Optionally, front end cavities and rear end cavities are arranged at both ends of the stator in the cylinder shell respectively;
[0024] The rear end cavity communicates with the rear bearing cooling channel;
[0025] A cooling oil outlet communicating with the front end cavity is arranged on the cylinder shell;
[0026] The stator cooling channel communicates with the front end cavity and the rear end cavity respectively at both ends.
[0027] Optionally, the front end cavity and the rear end cavity are both annular cavities extending along the circumferential direction of the rotor of the high-speed oil-cooled motor.
[0028] By adopting the above technical solution, the application has the following beneficial effects:
[0029] The high-speed oil-cooled motor capable of cooling bearings of the application cools the bearings in sequence through the front bearing cooling channel, the cylinder shell channel and the rear bearing cooling channel after the cooling liquid enters the motor, the bearings do not need to be designed with additional cooling devices and are not in direct contact with the cooling liquid, thereby eliminating the risk of leakage of the cooling liquid from the bearing cavity, the bearings can use grease lubrication or lifelong lubrication sealed bearings, and do not need to be provided with a circulating oil lubrication or oil-air lubrication system, thereby reducing the sealing requirement of the bearing cavity, simplifying the system structure, improving the reliability of the system, and reducing the complexity and cost of the system.
[0030] The specific embodiments of the application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS
[0031] The accompanying drawings are part of the present application and serve to provide a further understanding of the present application, the illustrative embodiments of the present application and the description thereof serve to explain the present application, but do not constitute an improper limitation on the present application. Obviously, the drawings described below are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor. In the drawings:
[0032] Figure 1 A front view of one side of the front end cover of the high-speed oil-cooled motor capable of cooling bearings of the embodiments of the application is shown in the drawings;
[0033] Figure 2 The front end cavity and the rear end cavity are both annular cavities extending along the circumferential direction of the rotor of the high-speed oil-cooled motor. Figure 1 A cross-sectional view in the direction of A-A;
[0034] Figure 3 For Figure 1 B-B direction view in the middle;
[0035] Figure 4 For Figure 1 C-C direction view in the middle;
[0036] Figure 5 A partial sectional view of a high-speed oil-cooled motor capable of cooling bearings provided by an embodiment of the present application;
[0037] Figure 6 A flow direction diagram of a cooling liquid of a high-speed oil-cooled motor capable of cooling bearings provided by an embodiment of the present application.
[0038] In the figure: barrel shell 1, barrel shell passage 11, cooling oil outlet 12, front end cavity 13, rear end cavity 14, front end cover 2, front bearing cooling passage 21, first annular passage 211, front end liquid inlet passage 22, front end liquid outlet passage 23, rear end cover 3, rear bearing cooling passage 31, rear end liquid inlet passage 32, rear end liquid outlet passage 33, front bearing 4, rear bearing 5, cooling oil inlet a, stator 6, stator cooling passage 61, rotor 7, oil separation ring 8.
[0039] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION
[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.
[0041] In the description of the present application, it should be noted that the terms “upper”, “lower”, “inner”, “outer” and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0042] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms “mounting”, “connection” should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0043] Referring to Figures 1 to 6 As shown in the drawings, the embodiment of the present application provides a high-speed oil-cooled motor capable of cooling bearings, comprising a cylinder shell 1, a front end cover 2 and a rear end cover 3. The cylinder shell 1 is provided with a cylinder shell passage 11. The front end cover 2 is arranged at one end of the cylinder shell 1 along the length direction, and the front end cover 2 is provided with a front bearing cooling passage 21, which is communicated with the cylinder shell passage 11. The rear end cover 3 is arranged at the other end of the cylinder shell along the length direction, and the rear end cover 3 is provided with a rear bearing cooling passage 31, which is communicated with the cylinder shell passage 11. After the cooling liquid enters the motor, the high-speed oil-cooled motor capable of cooling bearings of the present application successively flows through the front bearing cooling passage 21, the cylinder shell passage 11 and the rear bearing cooling passage 31 to cool the bearings. The bearings do not need to be designed with additional cooling devices and are not in direct contact with the cooling liquid, thereby eliminating the risk of leakage of the cooling liquid from the bearing cavity. The bearings can use grease lubrication or lifelong lubrication sealed bearings, and do not need to be provided with a circulating oil lubrication or oil-air lubrication system, thereby reducing the sealing requirement of the bearing cavity, simplifying the system structure, improving the reliability of the system, and reducing the complexity and cost of the system.
[0044] The front end cover 2 is provided with a front bearing cavity in the middle, and the front bearing cooling passage 21 extends along the circumference of the front bearing cavity. The rear end cover 3 is provided with a rear bearing cavity in the middle, and the rear bearing cooling passage 31 extends along the circumference of the rear bearing cavity. The front bearing cooling passage 21 is annular and extends along the outside of the front bearing cavity. When the cooling liquid flows through the front bearing cooling passage 21, the front bearing 4 can be effectively cooled and cooled. The front bearing cooling passage 21 is not communicated with the front bearing cavity, and the cooling liquid flowing in the front bearing cooling passage 21 will not be in direct contact with the front bearing 4, thereby eliminating the risk of leakage of the cooling liquid from the bearing cavity. The rear bearing cooling passage 31 is annular and extends along the outside of the front bearing cavity. When the cooling liquid flows through the rear bearing cooling passage 31, the rear bearing 5 can be effectively cooled and cooled. The rear bearing cooling passage 31 is not communicated with the rear bearing cavity, and the cooling liquid flowing in the rear bearing cooling passage 31 will not be in direct contact with the rear bearing 5, thereby eliminating the risk of leakage of the cooling liquid from the bearing cavity.
[0045] In a possible implementation, the front bearing cooling channel 21 comprises a plurality of first annular channels 211, each of which is arranged along the thickness direction of the front end cover 2 in sequence, each of which is located outside the front bearing cavity, and each of which is connected to the barrel shell channel 11 in sequence or in parallel. The connection between each of the first annular channels 211 in sequence means that the adjacent two first annular channels 211 are connected in series, and the cooling liquid flows through each of the first annular channels 211 in sequence and finally flows into the barrel shell channel 11. The connection of each of the first annular channels 211 in parallel means that each of the first annular channels 211 is connected to the barrel shell channel 11 at the same time, and the cooling liquid flows through each of the first annular channels 211 in multiple ways at the same time and finally flows into the barrel shell channel 11. The arrangement of each of the first annular channels 211 ensures the structural strength and increases the heat exchange area of the bearing cooling channel. The front bearing cooling channel 21 can also only comprise one annular channel with a large cross section, but the material requirement for manufacturing the front bearing cooling channel 21 is higher, and a certain structural strength is required. However, compared with the design of a plurality of first annular channels 211, the processing difficulty of the larger annular channel is low, the heat exchange area in the front bearing cooling channel 21 is reduced, and the cooling effect of the front bearing 4 is reduced. However, since the front cooling channel is close to the front bearing 4, the cooling effect is still better than that in the prior art.
[0046] The cross section of the first annular channel 211 is rectangular, and the width direction of the rectangle is the same as the thickness direction of the front end cover 2. That is, the cross section of the first annular channel 211 is rectangular when it is cut by a plane where the rotation axis is located. More first annular channels 211 can be arranged along the thickness direction of the front end cover 2, which increases the heat exchange area and is more conducive to improving the heat exchange efficiency of the front bearing 4 and the cooling effect of the front bearing 4.
[0047] The rear bearing cooling channel 31 comprises a plurality of second annular channels, each of which is arranged along the thickness direction of the rear end cover 3 in sequence, each of which is located on the outside of the rear bearing cavity, and each of which is connected in sequence or in parallel to the barrel channel 11. The connection between each of the second annular channels in sequence means that the connection between each of the second annular channels is in series, and the adjacent two second annular channels are connected in communication, and the cooling liquid flows through each of the second annular channels in sequence from the barrel channel 11. The connection of each of the second annular channels in parallel means that each of the second annular channels simultaneously communicates with the barrel channel 11, and the cooling liquid simultaneously flows through each of the second annular channels in multiple paths from the barrel channel 11. The arrangement of each of the second annular channels ensures the structural strength while increasing the heat exchange area of the rear bearing cooling channel. The structure of the second annular channel is the same as that of the first annular channel 211.
[0048] In a possible implementation, the front end cover 2 is provided with a front end liquid inlet channel 22 extending along the radial direction of the front end cover 2, and the front end liquid inlet channel 22 communicates with the front bearing cooling channel 21. The front end cover 2 or the barrel 1 is provided with a cooling oil inlet a communicating with the front end liquid inlet channel 22. When each of the first annular channels 211 is connected in series, one of the first annular channels 211 located at the end communicates with the front end liquid inlet channel 22, and the other first annular channels 211 communicate in sequence. When each of the first annular channels 211 is connected in parallel, the cross-sectional area of the front end liquid inlet channel 22 is larger, and each of the first annular channels 211 can simultaneously communicate with the front end liquid inlet channel 22. The front end cover 2 is also provided with the front end liquid outlet channel 23 extending along the radial direction of the front end cover 2, and the front end liquid outlet channel 23 can be arranged at a position opposite to the front end liquid inlet channel 22 on the front end cover 2. The front end liquid outlet channel 23 communicates between the front bearing cooling channel 21 and the barrel channel 11. After the cooling liquid enters the motor from the cooling oil inlet a, it flows through the front end liquid inlet channel 22, the front bearing cooling channel 21, the front end liquid outlet channel 23 and the barrel channel 11 in sequence to cool the front bearing 4.
[0049] The rear end cover 3 is provided with a rear end liquid inlet channel 32 extending along the radial direction of the rear end cover 3, and the two ends of the rear end liquid inlet channel 32 are communicated with the barrel channel 11 and the rear bearing cooling channel 31 respectively. The rear end cover 3 is also provided with a rear end liquid outlet channel 33 extending along the radial direction of the rear end cover 3, and the rear end liquid outlet channel 33 can be arranged at a position opposite to the rear end liquid inlet channel 32 on the rear end cover 3. The rear end liquid inlet channel 32 is communicated with the rear bearing cooling channel 31.
[0050] In a possible implementation, the high-speed oil-cooled motor capable of cooling the bearing includes a stator 6 arranged inside the barrel 1, and the stator 6 is provided with a stator cooling channel 61 extending along the length direction of the barrel 1, and the stator cooling channel 61 is communicated with the rear bearing cooling channel 31. The stator cooling channel 61 can be a channel with a large cross section, or can be a plurality of channels with small cross sections connected in parallel.
[0051] The barrel 1 is provided with a front end cavity 13 and a rear end cavity 14 at the two ends of the stator 6 respectively, the rear end cavity 14 is communicated with the rear bearing cooling channel 31, the barrel 1 is provided with a cooling oil outlet 12 communicated with the front end cavity 13, and the two ends of the stator cooling channel 61 are communicated with the front end cavity 13 and the rear end cavity 14 respectively. The rear end cavity 14 is communicated with the rear end liquid outlet channel 33, the cooling liquid enters the rear end liquid inlet channel 32 from the barrel channel 11, and then enters the rear bearing cooling channel 31, the rear end liquid outlet channel 33, the rear end cavity 14, the stator cooling channel 61 and the front end cavity 13 in sequence, and finally flows out from the cooling oil outlet 12. The cooling liquid also has a heat dissipation effect on the inside of the motor when flowing through the rear end cavity 14 and the front end cavity 13.
[0052] The front end cavity 13 and the rear end cavity 14 are both annular cavities extending along the circumferential direction of the rotor of the high-speed oil-cooled motor. The annular cavities have a large flow area, which can effectively increase the contact area and has a good cooling effect.
[0053] The flow track of the cooling liquid of the high-speed oil-cooled motor capable of cooling the bearing of the application is: cooling oil inlet a→ front end liquid inlet channel 22→ front bearing cooling channel 21→ front end liquid outlet channel 23→ barrel shell channel 11→ rear end liquid inlet channel 32→ rear bearing cooling channel 31→ rear end liquid outlet channel 33→ rear end cavity 14→ stator cooling channel 61→ front end cavity 13→ cooling oil outlet 12. The front end liquid inlet channel 22, the front end liquid outlet channel 23 and the barrel shell channel 11 can be replaced by a hose or a hard tube outside the barrel shell channel 11 to simplify the machining difficulty of the barrel shell 1. In this case, the heat exchange between the cooling oil and the bearing mainly occurs in the bearing cooling channel, and the design does not affect the cooling effect of the bearing. The high-speed oil-cooled motor capable of cooling the bearing further comprises an oil separation ring 8 arranged between the stator 6 and the rotor 7.
[0054] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above-mentioned technical content without departing from the technical solution of the present application, and any simple modification, equivalent change and modification of the above-mentioned embodiment according to the technical essence of the present application still belong to the scope of the present application.
Claims
1. A high speed oil cooled electric machine capable of cooling a bearing, characterized by, include: A cylindrical shell, on which a cylindrical shell channel is provided; A front end cover is provided at one end of the cylindrical shell along its length, and a front bearing cooling channel is provided on the front end cover, which is connected to the cylindrical shell channel; A rear end cover is provided at the other end of the cylinder shell along its length. A rear bearing cooling channel is provided on the rear end cover, and the rear bearing cooling channel is connected to the cylinder shell channel.
2. A high speed oil-cooled electric machine with cooling of bearings according to claim 1, characterized in that, The front end cover has a front bearing cavity in the middle, and the front bearing cooling channel extends circumferentially along the front bearing cavity; The rear bearing cavity is provided in the middle of the rear end cover, and the rear bearing cooling channel extends circumferentially along the rear bearing cavity.
3. A high speed oil-cooled electric machine with cooling of bearings according to claim 2, characterized in that, The front bearing cooling channel includes a plurality of first annular channels, each of which is arranged sequentially along the thickness direction of the front end cover. Each of the first annular channels is located on the outside of the front bearing cavity, and the first annular channels are connected sequentially or connected in parallel to the shell channel.
4. A high speed oil-cooled electric machine with cooling of bearings according to claim 3, characterized in that, The first annular channel has a rectangular cross-section, and the width direction of the rectangle is in the same direction as the thickness direction of the front end cover.
5. The high speed oil-cooled electric machine with cooling of bearings according to claim 2, characterized in that, The rear bearing cooling channel includes multiple second annular channels, each of which is arranged sequentially along the thickness direction of the rear end cover. Each second annular channel is located outside the rear bearing cavity, and each second annular channel is connected sequentially or connected in parallel to the shell channel.
6. The high speed oil-cooled electric machine with cooling of bearings according to claim 1, characterized in that, The front end cover is provided with a front liquid inlet channel, which extends radially along the front end cover and is connected to the front bearing cooling channel. A cooling oil inlet that connects to the front liquid inlet channel is provided on the front end cover or the cylindrical shell.
7. The high speed oil-cooled electric machine with cooling of bearings according to claim 1, characterized in that, The rear end cover is provided with a rear end liquid inlet channel, which extends radially along the rear end cover, and the two ends of the rear end liquid inlet channel are respectively connected to the shell channel and the rear bearing cooling channel.
8. The high speed oil-cooled electric machine with cooling of bearings according to claim 1, characterized in that, Includes a stator, which is disposed inside the cylindrical shell; The stator is provided with a stator cooling channel; The stator cooling channel extends along the length of the cylindrical shell; The stator cooling channel is connected to the rear bearing cooling channel.
9. A high speed oil-cooled electric machine that can cool a bearing according to claim 8, characterized by, The cylindrical shell is provided with a front end cavity and a rear end cavity at both ends of the stator; The rear end cavity is connected to the rear bearing cooling channel; The cylindrical shell is provided with a cooling oil outlet that communicates with the front end cavity; The stator cooling channel is connected to the front end cavity and the rear end cavity at both ends, respectively.
10. A high speed oil-cooled electric machine that can cool a bearing according to claim 9, characterized by, Both the front end cavity and the rear end cavity are annular cavities extending circumferentially along the rotor of the high-speed oil-cooled motor.