Oil cooling heat dissipation structure and oil cooling motor

Abstract

The utility model belongs to the technical field of oil cooling motors, and provides an oil cooling heat dissipation structure and an oil cooling motor, the oil cooling heat dissipation structure comprises a rotating shaft, the rotating shaft is provided with an inner cavity, and one end of the inner cavity is provided with an oil inlet; a front pressing plate, a rotor core, a rear pressing plate and a pressing ring are installed on the surface of the rotating shaft in the axial direction of the rotating shaft, and the front pressing plate and the rear pressing plate are installed at the two ends of the rotor core respectively. And a plurality of wind thorns are arranged on the end surfaces of the front pressing plate and the rear pressing plate. According to the utility model, an oil cooling heat dissipation mode and a wind thorn heat dissipation mode are combined, cooling oil enters the rotating shaft during oil cooling, then can flow to the front pressing plate and the rear pressing plate through a radial oil path, then flows to the rotor iron core through an axial oil path and finally is discharged, the cooling oil can absorb heat generated by the motor in the process, and the heat dissipation effect is improved; when the wind thorns dissipate heat, the rotor rotates anticlockwise, the wind thorns point clockwise, the wind thorns synchronously rotate along with the rotor, heat at the end of the rotor can be effectively taken away, and uniform heat dissipation of the rotor is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to oil cooling motor technical field, especially relate to an oil cooling heat dissipation structure and oil cooling motor. BACKGROUND

[0002] The oil cooling motor is a special motor, and its cooling system adopts an oil circulation mode. The oil cooling motor mainly comprises a stator, a rotor and a cooling system. The stator is a fixed part of the motor, and mainly functions to generate a rotating magnetic field; the rotor is a moving part of the motor, and mainly rotates under the magnetic force of the magnetic field; and the cooling system comprises an oil pump, a radiator and an oil pool and the like.

[0003] The existing rotor oil cooling scheme is to cool the oil passing through the inner cavity of the rotor, and the cooling oil is directly thrown out through the oil throwing hole. This heat dissipation mode has limited heat dissipation capacity for the rotor core, especially the surface of the rotor, and cannot effectively cool the same. UTILITY MODEL CONTENTS

[0004] In order to solve the problems in the background art, the utility model provides an oil cooling heat dissipation structure and an oil cooling motor.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] An oil cooling heat dissipation structure comprises:

[0007] A rotating shaft is provided with an inner cavity, and one end of the inner cavity is provided with an oil inlet;

[0008] A front pressing plate, a rotor core, a rear pressing plate and a pressing ring are mounted on the surface of the rotating shaft along the axial direction of the rotating shaft, and the front pressing plate and the rear pressing plate are respectively mounted at both ends of the rotor core; and the pressing ring is abutted at one end of the rear pressing plate away from the rotor core;

[0009] The front pressing plate and the rear pressing plate are both provided with an oil channel extending along the radial direction of the rotating shaft, and are used for being communicated with the inside of the rotating shaft;

[0010] The rotor core is provided with an oil channel extending along the axial direction of the rotating shaft, and is used for being communicated with the oil channels of the front pressing plate and the rear pressing plate;

[0011] The end surface of the front pressing plate and the rear pressing plate is provided with a plurality of wind thorns.

[0012] Preferably, one end of the rotating shaft is closed, and the other end is used for opening the oil inlet.

[0013] Preferably, the inner cavity surface of the rotating shaft is uniformly provided with n oil throwing holes corresponding to the positions of the front pressing plate and the rear pressing plate along the circumferential direction, and n is greater than or equal to 1; and the oil throwing holes are used for being communicated with the oil channels in the front pressing plate and the rear pressing plate.

[0014] Preferably, the front pressing plate is provided with n third oil paths extending in the radial direction, each of which is communicated with a corresponding oil throwing hole.

[0015] Preferably, the rear pressing plate is provided with n first oil paths extending in the radial direction, each of which is communicated with a corresponding oil throwing hole.

[0016] Preferably, the end of the rotor core is uniformly provided with 2n second oil paths extending in the axial direction.

[0017] In the 2n second oil paths:

[0018] The 1st, 3rd, …, 2n-1th second oil paths correspond to and communicate with the n first oil paths one by one.

[0019] The 2nd, 4th, …, 2nth second oil paths correspond to and communicate with the n third oil paths one by one.

[0020] Preferably, n oil outlets are provided on the end surface of the front pressing plate and the rear pressing plate, and the oil outlets are communicated with the corresponding third oil paths.

[0021] Preferably, in the rotor core, a magnetic steel is installed in the second oil path, and the end of the magnetic steel is flush with the end of the rotor core.

[0022] Preferably, the wind stab is arc-shaped, and the inner arc surface faces in the opposite direction of the rotation direction of the rotating shaft.

[0023] An oil-cooled motor adopts the oil-cooled heat dissipation structure.

[0024] The oil-cooled motor has the following beneficial effects:

[0025] The oil-cooled motor combines the oil-cooled heat dissipation and the wind stab heat dissipation, and when the oil-cooled heat dissipation is used, the cooling oil can flow to the front pressing plate and the rear pressing plate through the radial oil paths after entering the rotating shaft, then flow to the rotor core through the axial oil paths, and finally be discharged, so that the cooling oil can absorb the heat generated by the motor and improve the heat dissipation effect; when the wind stab heat dissipation is used, the rotor rotates counterclockwise, the wind stab points clockwise, the wind stab rotates synchronously with the rotor, thereby disturbing the rotor end and directionally transferring the heat of the rotor to the surroundings, so that the heat of the rotor end can be effectively taken away, and the rotor can be uniformly cooled.

[0026] Other features and advantages of the oil-cooled motor will be described in the following description, and some of them will become apparent from the description, or be understood by those skilled in the art through implementation of the oil-cooled motor. The purpose and other advantages of the oil-cooled motor can be achieved and obtained through the structures indicated in the description and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0028] Figure 1 A three-dimensional structure schematic diagram of the oil cooling heat dissipation structure is shown;

[0029] Figure 2 A cross-sectional view of the oil cooling heat dissipation structure on the first oil path is shown;

[0030] Figure 3 A cross-sectional view of the oil cooling heat dissipation structure on the third oil path is shown;

[0031] Figure 4 An end face view of the rotor core is shown;

[0032] Figure 5 A structure diagram of the wind stab on the front or rear pressing plate is shown.

[0033] In the figure: 1, rotating shaft; 2, front pressing plate; 3, rotor core; 4, rear pressing plate; 5, pressing ring; 6, oil throwing hole; 7, first oil path; 8, second oil path; 9, oil inlet; 10, oil outlet; 11, magnetic steel; 12, wind stab; 13, third oil path. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application. Obviously, the described embodiments are some 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 labor are within the protection scope of the present application.

[0035] An oil cooling heat dissipation structure, such as Figure 1As shown, including the rotating shaft 1, front pressing plate 2, rotor core 3, rear pressing plate 4 and pressure ring 5. Wherein the rotating shaft 1 is provided with a cavity, and the cavity one end is provided with oil inlet 9, the other end is closed. Along the rotating shaft 1 axial, on the surface of rotating shaft 1 install above-mentioned front pressing plate 2, rotor core 3 and rear pressing plate 4, and front pressing plate 2 and rear pressing plate 4 are fixedly installed at both ends of rotor core 3 respectively. At the same time front pressing plate 2 and rear pressing plate 4 are provided with oil channel along the radial extension of rotating shaft 1, for with rotating shaft 1 inside communication;Rotor core 3 is provided with oil channel along the axial extension of rotating shaft 1, the oil channel is used for with the oil channel of front pressing plate 2 and rear pressing plate 4 communication. When cooling oil enters rotating shaft 1 can flow to front pressing plate 2 and rear pressing plate 4 through the radial oil channel, then flow to rotor core 3 through the axial oil channel, finally discharge, the process cooling oil can absorb the heat generated by motor, improve the heat dissipation effect.

[0036] In addition, the end surface of front pressing plate 2 and rear pressing plate 4 is provided with several wind sticks 12. The wind sticks 12 can disturb the local air of front pressing plate 2 and rear pressing plate 4, and direct heat dissipation to the surrounding, which solves the problems of rotor heat dissipation difficulty and uneven temperature distribution in combination with the above-mentioned oil channel heat dissipation mode.

[0037] It should be noted that, in Figure 1 the end of rear pressing plate 4 away from rotor core 3 abuts against pressure ring 5, which can press front pressing plate 2 and rear pressing plate 4 and rotor core 3 tightly.

[0038] The oil cooling heat dissipation structure of the utility model is further described below. Figures 2-5

[0039] For example, the inner cavity surface of rotating shaft 1 is uniformly provided with n oil throwing holes 6 corresponding to the positions of front pressing plate 2 and rear pressing plate 4 along the circumference, n≥1, and the oil throwing holes 6 are used for communication with the oil channels in front pressing plate 2 and rear pressing plate 4. At the same time, front pressing plate 2 is provided with n third oil channels 13 extending along the radial direction, and each third oil channel 13 is in communication with the corresponding oil throwing hole 6. In addition, rear pressing plate 4 is provided with n first oil channels 7 extending along the radial direction, and each first oil channel 7 is in communication with the corresponding oil throwing hole 6. Moreover, the end of rotor core 3 is uniformly provided with 2n second oil channels 8 extending along the axial direction.

[0040] Further, in the 2n second oil channels 8, the 1st, 3rd,..., 2n-1st second oil channels 8 correspond to and communicate with the n first oil channels 7 one by one;The 2nd, 4th,..., 2n second oil channels 8 correspond to and communicate with the n third oil channels 13 one by one. At the same time, n oil outlets 10 are provided on the end surface of front pressing plate 2 and rear pressing plate 4, and the oil outlets 10 are in communication with the corresponding third oil channels 13.

[0041] ​It should be noted that there are two flow paths for the cooling oil in the above structure. The first path flows sequentially through the oil inlet 9, the inner cavity of the shaft 1, the oil slinger 6, the first oil passage 7, the (2n-1)th second oil passage 8, and the oil outlet 10. The second path flows sequentially through the oil inlet 9, the inner cavity of the shaft 1, the oil slinger 6, the third oil passage 13, the (2n)th second oil passage 8, and the oil outlet 10. As can be seen from the flow paths, after entering the shaft 1, the cooling oil enters the first oil passage 7 and the third oil passage 13 through the corresponding oil slinger 6, then enters the corresponding second oil passage 8, and finally exits through the corresponding oil outlet 10. At this point, the cooling oil fills the motor's oil passages, improving the oil cooling effect.

[0042] For example, such as Figure 2 As shown, where n = 4, and also combined with Figure 5 It can be seen that the front pressure plate 2 and the rear pressure plate 4 have a structure with air spikes 12. The height of the air spikes 12 is 4mm to 6mm, and they adopt an arc-shaped structure. The length can be adjusted according to the diameter of the pressure plate. The inner arc surface of the air spikes 12 points in the opposite direction to the rotation direction of the rotating shaft 1. After the rotating shaft 1 is manufactured, the front pressure plate 2 is installed on the rotating shaft 1, ensuring that the oil slinger hole 6 of the rotating shaft 1 is connected to the third oil passage 13.

[0043] Furthermore, combined Figure 2 and Figure 3 It can be seen that in the rotor core 3, a magnet 11 is installed inside the second oil passage 8, and the two end faces of the magnet 11 are flush with the two end faces of the rotor core 3. The second oil passage 8 is opened in a region 5mm away from the outer wall of the rotor core 3. The second oil passage 8 runs through the axial direction and is located outside the magnet 11. In addition, the height of the second oil passage 8 is 1mm to 2mm, and the distance from the outer wall of the rotor core 3 is 1mm to 2mm. At the same time, the width of the second oil passage 8 is determined according to the rotor electromagnetic scheme. Without affecting the electromagnetic performance of the rotor, the width is opened to the maximum extent and distributed along the circumference of the rotor core 3. The number is determined according to the rotor loss.

[0044] It should be noted that, in combination Figure 4 and Figure 5 It can be seen that the transverse cross-section of the second oil passage 8 is arc-shaped.

[0045] The following is an introduction Figures 1-5 Installation process of the heat dissipation structure in the middle:

[0046] The implementation steps of a novel oil-cooled heat dissipation method for motor rotors are as follows:

[0047] Step 1: Open oil slinger holes 6 on the inner surface of the rotating shaft 1. The number of oil slinger holes 6 is determined according to the rotor loss, that is, the higher the rotor loss, the more holes there are.

[0048] Step 2: Make the front pressure plate 2 and the rear pressure plate 4.

[0049] Step 3, install the magnetic steel 11 in the rotor core 3, the end face of the magnetic steel 11 is flush with the end face of the rotor core 3.

[0050] Step 4, install the rotor core 3 with the magnetic steel 11 on the rotating shaft 1, ensure that the third oil path 13 is communicated with the second oil path 8.

[0051] Step 5, install the rear pressing plate 4 on the rotating shaft 1, ensure that the second oil path 8 is communicated with the first oil path 7, and the oil throwing hole 6 is communicated with the first oil path 7.

[0052] Step 6, finally install the pressing ring 5 on the rotating shaft 1, press the front pressing plate 2 and the rear pressing plate 4 and the rotor core 3.

[0053] An oil-cooled motor adopts the oil-cooled heat dissipation structure. The oil-cooled motor combines the oil-cooled heat dissipation and the heat dissipation form of the wind fin 12, and greatly improves the heat dissipation effect. Therefore, the heat dissipation is divided into two parts, the first part is oil-cooled. First, the cooling oil enters the inner cavity of the rotating shaft 1 through the oil inlet 9 of the rotating shaft 1, and cools the inner cavity of the rotating shaft 1. Then, the rotating shaft 1 rotates at high speed, and the cooling oil in the inner cavity of the rotating shaft 1 enters the first oil path 7 and the third oil path 13 on both sides through the oil throwing hole 6 under the action of centrifugal force, and the cooling oil is introduced into the second oil path 8. The second oil path 8 is close to the outer edge wall of the rotor, and the loss of the rotor core 3 is mainly distributed in the outer edge wall area of the rotor. In the second oil path 8, the cooling oil is in convection heat exchange with the rotor core 3, so that the overall temperature of the rotor core 3 is lowered. The second oil path 8 is in a bidirectional cross mode, as shown by the arrows in the accompanying drawings, the cooling oil enters the pressing plate oil channel through the oil throwing hole 6 on both sides of the rotating shaft 1, and then enters the second oil path 8. This cooling method can make the overall temperature distribution of the rotor more uniform. Finally, the cooling oil is thrown out through the oil outlet 10. The oil path cools the rotor core 3 from the inside and outside of the rotor, and improves the cooling efficiency of the rotor. The second part is air-cooled, and the wind fin 12 on the rotor pressing plate cools the end part of the rotor. The rotor rotates counterclockwise, and the wind fin 12 points clockwise. The wind fin 12 rotates synchronously with the rotor, thereby disturbing the end part of the rotor and directing the heat of the rotor to the surrounding, which can effectively take away the heat of the end part of the rotor and realize uniform heat dissipation of the rotor. Figure 2 and 3 The cooling oil enters the second oil path 8 through the oil throwing hole 6 on both sides of the rotating shaft 1, and then enters the second oil path 8. This cooling method can make the overall temperature distribution of the rotor more uniform. Finally, the cooling oil is thrown out through the oil outlet 10. The oil path cools the rotor core 3 from the inside and outside of the rotor, and improves the cooling efficiency of the rotor. The second part is air-cooled, and the wind fin 12 on the rotor pressing plate cools the end part of the rotor. The rotor rotates counterclockwise, and the wind fin 12 points clockwise. The wind fin 12 rotates synchronously with the rotor, thereby disturbing the end part of the rotor and directing the heat of the rotor to the surrounding, which can effectively take away the heat of the end part of the rotor and realize uniform heat dissipation of the rotor.

[0054] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: It can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; And these modifications or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. An oil cooling heat dissipation structure characterized by comprising: include: A rotating shaft (1) is provided with an inner cavity, and an oil inlet (9) is provided at one end of the inner cavity; Along the axial direction of the rotating shaft (1), a front pressure plate (2), a rotor core (3), a rear pressure plate (4), and a pressure ring (5) are installed on the surface of the rotating shaft (1). The front pressure plate (2) and the rear pressure plate (4) are respectively installed at both ends of the rotor core (3); the pressure ring (5) abuts against the end of the rear pressure plate (4) away from the rotor core (3). Both the front pressure plate (2) and the rear pressure plate (4) are provided with oil passages extending radially along the rotating shaft (1) for communicating with the interior of the rotating shaft (1); The rotor core (3) has an oil passage extending axially along the shaft (1) for connecting with the oil passages of the front pressure plate (2) and the rear pressure plate (4); The end faces of the front pressure plate (2) and the rear pressure plate (4) are provided with a number of air spikes (12).

2. The oil cooling structure according to claim 1, wherein One end of the rotating shaft (1) is closed, and the other end is used to open the oil inlet (9).

3. The oil cooling structure according to claim 1, wherein The inner surface of the rotating shaft (1) is provided with n oil-throwing holes (6) evenly distributed in the circumferential direction at the positions corresponding to the front pressure plate (2) and the rear pressure plate (4), where n≥1. The oil-throwing holes (6) are used to communicate with the oil passages in the front pressure plate (2) and the rear pressure plate (4).

4. The oil cooling structure according to claim 3, wherein The front pressure plate (2) has n third oil passages (13) extending radially, and each of the third oil passages (13) is connected to the corresponding oil slinger (6).

5. The oil cooling structure according to claim 4, wherein The rear pressure plate (4) has n first oil passages (7) extending radially, and each first oil passage (7) is connected to the corresponding oil throwing hole (6).

6. The oil cooling structure according to claim 5, wherein The rotor core (3) has 2n axially continuous second oil passages (8) evenly distributed at its end; In the 2n second oil lines (8): The first, third, ..., 2n-1 second oil lines (8) correspond one-to-one with the n first oil lines (7) and are connected; The second, fourth, ..., 2n second oil lines (8) correspond one-to-one with the n third oil lines (13) and are connected.

7. The oil cooling structure according to claim 5, wherein n oil outlets (10) are provided on the end faces of the front pressure plate (2) and the rear pressure plate (4), and the oil outlets (10) are connected to the corresponding third oil passages (13).

8. The oil cooling structure according to claim 6, wherein In the rotor core (3), a magnet (11) is installed inside the second oil passage (8), and the end of the magnet (11) is flush with the end of the rotor core (3).

9. An oil cooling structure according to any one of claims 1 to 8, wherein The wind spike (12) is arc-shaped, and the orientation of the inner arc surface is opposite to the rotation direction of the rotating shaft (1).

10. An oil-cooled electric machine characterized by, The oil-cooled heat dissipation structure described in any one of claims 1-9 is adopted.

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