Bearing lubrication structure and motor
By designing the oil collection structure and oil outlet of the motor to form a closed-loop oil circuit, the problems of high cost and difficult manufacturing process of bearing lubrication structure in the existing technology are solved, and efficient bearing lubrication cooling and motor cooling effect are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2026-04-10
AI Technical Summary
Existing motor bearing lubrication structures rely on oil circulation inside the rotor shaft for lubrication and cooling, resulting in high manufacturing costs, complex processes, and poor cooling performance.
The design incorporates an oil collection structure, an oil outlet, and an oil passage groove. Cooling oil flows through the oil collection structure and the oil outlet to the bearing for lubrication and cooling, forming a closed-loop oil circuit and preventing oil from flowing inside the rotor shaft.
This technology enables effective lubrication and cooling of the bearings without oil flow inside the rotor shaft, reducing manufacturing costs and process complexity while improving the cooling effect and efficiency of the motor.
Smart Images
Figure CN224107566U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of motor cooling, in particular to a bearing lubricating structure and a motor. BACKGROUND
[0002] A reasonable cooling method is a very important factor for improving the efficiency of a motor. At present, the cooling methods of motors usually include water cooling and oil cooling. The motor using the water cooling method has been relatively common, and generally uses a casing with an embedded water channel. After the casing is in direct contact with the stator core, the cooling liquid flowing in the casing water channel exchanges and removes the heat in the motor, so that the cooling effect is achieved. However, the water cooling method cannot directly contact the internal parts of the motor (such as the bearing, a key part), the cooling effect is poor, and the efficiency of the motor is also low. Compared with the water-cooled motor, the oil-cooled motor is the research focus in the current motor industry. The oil cooling method can use cooling oil to directly contact the internal parts of the motor to directly remove the heat, the cooling effect is remarkable, and the efficiency of the motor is also high.
[0003] However, the current bearing lubricating structure is to lubricate and cool the end bearing of the rotor shaft by passing oil in the rotor shaft, which results in high part manufacturing cost and high process difficulty. Therefore, a new bearing lubricating structure is urgently needed to lubricate and cool the bearing, so as to cool the motor. CONTENT OF THE INVENTION
[0004] The application provides a bearing lubricating structure and a motor, which can lubricate and cool the end bearing of the rotor shaft without passing oil in the rotor shaft, so as to cool the motor.
[0005] The application provides a bearing lubricating structure, and the front end bearing of the casing of the motor is provided with a bearing pressing plate, which comprises:
[0006] An oil collecting structure arranged on the rear end cover of the motor and an oil outlet hole arranged on the oil collecting structure;
[0007] An oil passing groove arranged on the bearing pressing plate.
[0008] In the bearing lubricating structure, the oil collecting structure arranged on the rear end cover has a certain inclination angle.
[0009] In the bearing lubricating structure, the bearing pressing plate and the front bearing chamber of the casing cooperate to form the oil collecting and oil passing structure.
[0010] In the bearing lubricating structure, the number of the oil outlet holes is at least two.
[0011] The bearing lubrication structure provided in the embodiment of the present application comprises a stator core of the motor, and an oil groove is arranged on the stator core.
[0012] The bearing lubrication structure provided in the embodiment of the present application comprises a stator core of the motor, and an oil groove is arranged on the stator core.
[0013] The bearing lubrication structure provided in the embodiment of the present application comprises a stator core of the motor, and an oil groove is arranged on the stator core. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.
[0015] Figure 1 The schematic diagram of the cooling oil path structure of the motor as a whole is provided in the embodiment of the present application.
[0016] Figure 2 The schematic diagram of the cooling oil path structure of the motor as a whole is provided in the embodiment of the present application.
[0017] Figure 3 The schematic diagram of the cooling oil path structure of the motor as a whole is provided in the embodiment of the present application.
[0018] Figure 4 The schematic diagram of the cooling oil path structure of the motor as a whole is provided in the embodiment of the present application.
[0019] Figure 5 The schematic diagram of the cooling oil path structure of the motor as a whole is provided in the embodiment of the present application.
[0020] Figure 6 The schematic diagram of the cooling oil path structure of the motor as a whole is provided in the embodiment of the present application.
[0021] Figure 7 Part of the rear end cover and the structure schematic diagram of the oil outlet hole provided by the embodiment of the present application.
[0022] Explanation of reference signs:
[0023] 10 - casing 20 - bearing pressing plate 30 - rear end cover
[0024] 40 - oil collecting structure 50 - oil outlet hole 60 - oil cooler
[0025] 70 - rear bearing 80 - front bearing 90 - rotor shaft
[0026] 100 - oil collecting and passing structure 110 - oil ring DETAILED DESCRIPTION
[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on 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 do not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0029] In the description of the application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.
[0030] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0031] The following disclosure provides many different embodiments or examples for implementing different structures of the application. In order to simplify the disclosure of the application, the components and arrangements of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the application. In addition, the application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.
[0032] The embodiment of the application provides a bearing lubrication structure, wherein a bearing pressing plate 20 is mounted at the front end bearing of a motor shell 10. Referring to Figures 1-7 , the bearing lubrication structure comprises:
[0033] The oil collecting structure 40 is arranged on the motor rear end cover 30, and the oil outlet hole 50 is arranged on the oil collecting structure 40.
[0034] The oil passage groove is arranged on the bearing pressing plate 20.
[0035] The oil cooler 60 is arranged on the motor shell 10, and the oil inlet passage and the oil outlet passage are arranged on the motor shell 10 close to the oil cooler 60.
[0036] Working principle: the cooling oil at the bottom of the motor is first filtered by the filter, then flows into the oil pump, and then flows into the oil cooler 60 through the oil inlet channel. After heat exchange with the cooling liquid in the oil cooler 60, the cooling liquid flows into the oil collecting structure 40 on the rear end cover 30 and the oil passage groove on the bearing pressing plate 20. The cooling liquid flows to the rear bearing position through the oil outlet hole 50 on the oil collecting structure 40 to lubricate and cool the rear bearing 70. At the same time, the cooling liquid flows to the front bearing position through the oil passage groove on the bearing pressing plate 20 to lubricate and cool the front bearing 80. Thus, the end bearings (front bearing 80 and rear bearing 70) of the rotor shaft 90 can be lubricated and cooled without oil in the rotor shaft 90, thereby cooling the motor.
[0037] In some embodiments, the oil collecting structure 40 provided on the rear end cover 30 has a certain inclination angle.
[0038] In some embodiments, the oil collecting structure 40 provided on the rear end cover 30 has a certain inclination angle, so that the cooling liquid flows to the rear bearing position through the oil outlet hole 50 to lubricate and cool the rear bearing 70.
[0039] In some embodiments, the bearing pressing plate 20 and the front bearing chamber of the shell 10 form an oil collecting and oil passage structure 100.
[0040] In some embodiments, the front bearing chamber is the position where the front bearing 80 is placed.
[0041] In some embodiments, the number of oil outlet holes 50 is at least two.
[0042] In some embodiments, the number of oil outlet holes 50 will affect the lubrication and cooling efficiency of the cooling oil on the rear bearing 70, so the number of oil outlet holes 50 can be set by the person skilled in the art according to the actual situation, and is not limited here.
[0043] In some embodiments, the stator core of the motor is provided with an oil groove, and the oil groove includes a radial oil groove and an axial oil groove.
[0044] In some embodiments, the cooling oil in the oil cooler 20 exchanges heat with the cooling liquid, then flows into the oil groove on the stator core through the oil outlet channel, and then flows into the oil collecting structure 40 on the rear end cover 30 and the oil passage groove on the bearing pressing plate 20.
[0045] In some embodiments, the radial oil groove and the axial oil groove are provided on the stator core at the same time, mainly to allow the cooling oil to pass through the entire stator to cool the stator, and at the same time, the cooling oil flows into the oil ring at both ends through the oil groove to form an oil passage.
[0046] In some embodiments, the stator of the motor is provided with an oil ring 110 at both ends, and the oil ring 110 is provided with an axial oil outlet channel and a radial oil outlet channel.
[0047] The cooling oil, after heat exchange with the cooling liquid in the oil cooler 20, flows into the oil groove on the stator core through the oil outlet channel, and then flows into the oil ring 110. Part of the cooling oil flows to the oil collection structure 40 on the rear end cover 30 and the oil passage groove on the bearing pressing plate 20 through the axial oil outlet channel on the oil ring 110, and the other part of the cooling oil flows to the winding end through the radial oil outlet channel on the oil ring 110 to cool the winding end and further reduce the temperature of the motor.
[0048] As can be seen from the above, the bearing lubrication structure of the present application, compared with the existing structure for lubricating and cooling the end bearing of the rotor shaft by oil flowing in the rotor shaft, although the number of process holes on the shell, end cover and other parts is reduced, a closed loop oil circuit can still be formed to achieve the lubrication and cooling effect of the end bearing, and the manufacturing cost of the parts is reduced to a certain extent, and the process manufacturing difficulty is reduced. The present application verifies that even if the inside of the rotor shaft is not supplied with oil, as long as there is a reasonable oil circuit structure arrangement, the motor can be cooled and the motor efficiency can be improved.
[0049] In summary, the bearing lubrication structure provided by the embodiments of the present application is installed with the bearing pressing plate 20 at the front end bearing of the motor shell 10. The cooling oil circuit structure includes the oil collection structure 40 arranged on the rear end cover 30 of the motor, the oil outlet hole 50 arranged on the oil collection structure 40, and the oil passage groove arranged on the bearing pressing plate 20. The cooling oil at the bottom of the entire motor is first filtered by the filter, then flows into the oil pump, and then flows into the oil collection structure 40 on the rear end cover 30 and the oil passage groove on the bearing pressing plate 20 through the oil inlet channel. The cooling liquid flows to the rear bearing position through the oil outlet hole 50 on the oil collection structure 40 to lubricate and cool the rear bearing 70, and at the same time, the cooling liquid flows to the front bearing position through the oil passage groove on the bearing pressing plate 20 to lubricate and cool the front bearing 80. Thus, the end bearings (front bearing 80 and rear bearing 70) of the rotor shaft 90 can still be lubricated and cooled without oil flowing in the inside of the rotor shaft 90, so that the motor can be cooled.
[0050] The embodiments of the present application also provide a motor, which comprises the bearing lubrication structure of any one of the above embodiments.
[0051] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.
[0052] The above describes in detail the bearing lubricating structure and the motor provided by the embodiment of the application. The principle and implementation of the application are described by using specific examples. The above embodiment is only used to help understand the technical solution of the application and the core idea thereof. Those skilled in the art should understand that the technical solution recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently, and the modification or replacement does not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the application.
Claims
1. A bearing lubrication structure, wherein a bearing pressing plate is installed at a front end bearing of a housing of an electric machine, characterized in that, The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor.
2. The bearing lubrication structure of claim 1, wherein The application relates to a bearing lubricating structure of a motor.
3. The bearing lubrication structure of claim 1, wherein The application relates to a bearing lubricating structure of a motor.
4. The bearing lubrication structure of claim 1, wherein The application relates to a bearing lubricating structure of a motor.
5. The bearing lubrication structure of claim 1, wherein The application relates to a bearing lubricating structure of a motor.
6. The bearing lubrication structure of claim 1, wherein The application relates to a bearing lubricating structure of a motor.
7. An electric machine characterized by The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor. The application relates to a bearing lubricating structure of a motor.