Directional reuse lubricating system for high-temperature return oil of motor

Abstract

The invention discloses a directional reuse lubricating system for high-temperature return oil of a motor. The directional reuse lubricating system comprises a left shell, a right shell, a first return oil reuse module, a second return oil reuse module, a third return oil reuse module, a fourth return oil reuse module, a transmission structure and an oil pan. The left shell is provided with a motor A, a left oil cooler, a left electronic pump, a left coarse filter, a left fine filter and a left electronic pump oil suction port; the motor A is provided with a motor A oil outlet I, a motor A high-temperature oil return area I, a motor A oil outlet II and a motor A high-temperature oil return area II; and the right shell is provided with a motor B, a right oil cooler, a right electronic pump, a right rough filter and a right fine filter. A motor return oil gradient utilization technology is adopted, high-temperature return oil of the motor is directly introduced into an oil spraying channel of the gearbox, and dual reuse of energy and oil is achieved; a self-adaptive oil spraying angle design is adopted, and an oil liquid covering track is optimized through an inclined flow guide plate (25 degrees + / -5 degrees).

Description

Technical Field

[0001] The present invention relates to the field of high-temperature oil return of motors, and in particular to a directional multiplexing lubrication system for high-temperature oil return of motors. Background Art

[0002] As the technology of high-power electric motors continues to improve, traditional water cooling methods are increasingly unable to meet their cooling needs. Analysis of product iterations and actual applications suggests that oil cooling systems, with their compact structure and high cooling efficiency, are becoming an excellent solution for heat dissipation. To reduce production costs and improve overall vehicle performance, a two-in-one oil cooling system, housing both the motor and transmission, is becoming a trend in new energy electric drive systems.

[0003] Traditional independent lubrication systems have problems with low oil utilization and high energy consumption. In the prior art, in order to lubricate the gears and bearings at various positions of the gearbox, the lubrication system uses multiple external oil pipes to connect to the positions of the gearbox where the gears and bearings are provided, and each external oil pipe needs to be provided with multiple joints for connection. This lubrication system takes up a large space and has complex oil circuit connections, which can easily lead to assembly errors, resulting in reduced connection reliability and high maintenance costs. The use of a common cavity oil cooling system for the motor and gearbox can greatly improve the oil utilization rate, but if the motor cooling return oil is directly returned to the oil tank, it will lead to insufficient gearbox lubrication, unreasonable oil channel design, and uneven gear lubrication coverage.

[0004] In response to the above problems, existing technologies such as the invention patent "Hydraulic Device and Engineering Machinery" applied for by Changsha Zhonglian Fire Fighting Machinery Co., Ltd., application number 201210567183.6. Provide a hydraulic device and engineering machinery, each function uses a separate oil channel to supply oil, requiring a total of four oil channels. When the patent is working, the first oil channel switching unit, the first oil channel, and the second oil channel switching unit are switched according to the working conditions, so that the first function under the first working condition and the second function under the second working condition can reuse the first oil channel, which can save an oil channel, that is, fewer oil channels can be used to achieve the functions of more oil channels, so that the rotary joint of the hydraulic device has better versatility, reduces costs, and is not prone to oil cross-talk and oil leakage problems.

[0005] However, the hydraulic rotary joints used in the prior art simply reuse the oil channels in a single structure, which still results in high costs and uneven gear lubrication coverage. A new lubrication system needs to be developed to overcome these issues. Summary of the Invention

[0006] Purpose of the invention: In view of the shortcomings and defects of the existing technology, the present invention provides a directional reuse lubrication system for high-temperature return oil of motors. The system adopts the cascade utilization technology of motor return oil to directly introduce the high-temperature return oil of the motor into the oil channel of the gearbox to achieve dual reuse of energy and oil; the system adopts an adaptive oil spraying angle design and optimizes the oil coverage trajectory through the inclined guide plate (25°±5°).

[0007] Technical solution: The present invention provides a directional multiplexing lubrication system for high-temperature oil return of a motor, characterized in that it includes a left housing, a right housing, a first oil return multiplexing module, a second oil return multiplexing module, a third oil return multiplexing module, a fourth oil return multiplexing module, a transmission structure and an oil pan; the left housing is provided with a motor A, a left oil cooler, a left electronic pump, a left coarse filter, a left fine filter and a left electronic pump oil suction port, and the motor A is provided with a motor A oil outlet I, a motor A high-temperature oil return area I, a motor A oil outlet II and a motor A high-temperature oil return area II; the right housing is provided with a motor B, a right oil cooler, a right electronic pump, a right coarse filter and a right fine filter.

[0008] Among them, the transmission structure includes an output shaft gear, an intermediate shaft pinion, an intermediate shaft gear, an input shaft pinion, an output shaft left bearing, an output shaft right bearing, an intermediate shaft left bearing, an intermediate shaft right bearing, an input shaft left bearing and an input shaft right bearing.

[0009] The output shaft gear, intermediate shaft pinion gear, intermediate shaft gearwheel and input shaft pinion gear are connected in sequence for transmission.

[0010] Among them, the first oil return reuse module is provided with an output shaft left oil return port, a guide plate A, an output shaft left bearing oil guide groove and an output shaft left bearing seat oil expansion groove, and receives the motor return oil from the high-temperature oil return zone I of motor A through the output shaft left oil return port.

[0011] Among them, the second oil return multiplexing module is provided with an intermediate shaft left oil return port and an intermediate shaft left oil dripping port, and receives the motor return oil from the high-temperature oil return zone II of motor A through the intermediate shaft left oil return port.

[0012] Among them, the return oil of motor A is used to realize directional oil spraying lubrication of the meshing area of ​​the output shaft gear and the intermediate shaft pinion gear of the gearbox and the left bearing of the output shaft of the gearbox through the first return oil reuse module, and the return oil of motor A is used to realize directional oil spraying lubrication of the left bearing of the intermediate shaft of the gearbox through the second return oil reuse module.

[0013] Among them, the return oil of motor B is used to realize directional oil spraying lubrication of the gear meshing area between the intermediate shaft large gear and the input shaft small gear of the gearbox and the right bearing of the intermediate shaft of the gearbox through the third return oil reuse module, and the return oil of motor B is used to realize directional oil spraying lubrication of the right bearing of the output shaft of the gearbox through the fourth return oil reuse module.

[0014] The axial spacing of the guide plate A satisfies the formula L≥0.2×d, where d is the gear module; the angle of the guide plate A satisfies the formula Where V oil is the return oil flow rate, R is the gear radius, and the guide plate A is inclined at 25°±5°. By adjusting the angle, the oil film coverage rate on the gear surface can be improved and the oil coverage trajectory can be optimized.

[0015] Among them, the return oil of motor A is directional sprayed with oil to lubricate the meshing area of ​​the output shaft gear and the intermediate shaft pinion gear of the gearbox and the left bearing of the output shaft of the gearbox through the first oil return reuse module; the oil outlet I of motor A reaches the high-temperature oil return area I of motor A, and the high-temperature return oil reaches the first oil return reuse module. The left return oil port of the output shaft on the first oil return reuse module reaches the guide plate A and the oil spray port of the left bearing of the output shaft. The guide plate guides the lubricating oil to the meshing area of ​​the output shaft gear of the gearbox. At the same time, the oil spray port of the left bearing of the output shaft sprays the lubricating oil into the left bearing of the output shaft of the gearbox to spray oil and lubricate the left bearing of the output shaft;

[0016] The return oil of motor A is directed through the second oil return reuse module to realize oil spraying lubrication on the left bearing of the intermediate shaft of the gearbox; the oil outlet II of motor A reaches the high-temperature oil return area II of motor A, and the high-temperature return oil reaches the second oil return reuse module. The left oil spraying port of the intermediate shaft on the second oil return reuse module sprays the return oil of motor A into the left bearing of the intermediate shaft of the gearbox to perform oil spraying lubrication on the left bearing of the intermediate shaft of the gearbox.

[0017] Among them, the directional reuse lubrication route of the motor B oil return corresponds to that of motor A. The motor B oil return passes through the third oil return reuse module to realize directional oil spraying lubrication of the gear meshing area between the large gear of the gearbox intermediate shaft and the small gear of the input shaft. At the same time, the oil spraying port of the right bearing of the intermediate shaft sprays the lubricating oil into the right bearing of the intermediate shaft of the gearbox, and performs directional oil spraying lubrication on the right bearing of the intermediate shaft; the motor B oil return passes through the fourth oil return reuse module to realize directional oil spraying lubrication of the right bearing of the gearbox output shaft.

[0018] Beneficial effects: Compared with the existing technology, the present invention has the following significant advantages: The present invention pioneered the motor return oil cascade utilization technology, which directly introduces the motor high-temperature return oil into the gearbox oil spray channel, realizing the dual reuse of energy and oil, increasing the motor return oil heat utilization rate by 40%, and shortening the gearbox preheating time by 50%; reducing the oil pump power and cooling requirements. Optimizing lubrication effect, reducing wear and improving system reliability. Reducing the frequency of oil changes and filter element replacements, reducing maintenance costs. By optimizing the oil coverage trajectory through the inclined guide plate (25°±5°), the gear surface oil film coverage rate is increased from 60% to 95%, supporting -30°-45° slope operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the transmission part of the present invention;

[0021] Figure 3 This is a structural diagram of the first oil return reuse module of the present invention;

[0022] Figure 4 This is a structural diagram of the second oil return reuse module of the present invention;

[0023] In the figure, 1 is motor A; 2 is the left housing; 3 is the right housing; 4 is motor B; 5 is the left oil cooler; 6 is the right oil cooler; 10 is the oil outlet I of motor A; 11 is the high-temperature oil return area I of motor A; 12 is the oil outlet II of motor A; 13 is the high-temperature oil return area II of motor A; 20 is the first oil return multiplexing module; 30 is the second oil return multiplexing module; 50 is the fourth oil return multiplexing module; 81 is the output shaft gear; 82 is the intermediate shaft pinion; 83 is the intermediate shaft gear; 84 is the input shaft pinion; 85 is the output shaft left bearing; 86 is the output shaft right bearing; 87 is the left bearing of the intermediate shaft; 88 is the right bearing of the intermediate shaft; 89 is the left bearing of the input shaft; 90 is the right bearing of the input shaft; 100 is the left oil return port of the output shaft; 101 is the guide plate A; 102 is the oil guide groove of the left bearing of the output shaft; 103 is the oil expansion groove of the left bearing seat of the output shaft; 105 is the left oil return port of the intermediate shaft; 106 is the left oil drip port of the intermediate shaft; 120 is the left electronic pump; 121 is the left coarse filter; 122 is the left fine filter; 126 is the oil suction port of the left electronic pump; 128 is the oil pan; 130 is the right electronic pump; 131 is the right coarse filter; 132 is the right fine filter. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0025] The motor return oil cascade utilization technology of the present invention is an energy-saving optimization method for lubrication or cooling systems (such as motor bearings, gearboxes, etc.). Through the rational design of the oil circuit system, the return oil is reused in multiple stages and layers to improve lubrication efficiency, reduce energy consumption and reduce oil consumption.

[0026] like Figure 1The directional multiplexing lubrication system for high-temperature oil return of a motor of the present invention includes a left housing 2, a right housing 3, a first oil return multiplexing module 20, a second oil return multiplexing module 30, a third oil return multiplexing module, a fourth oil return multiplexing module 50, a transmission structure and an oil pan 128; the left housing 2 is provided with a motor A1, a left oil cooler 5, a left electronic pump 120, a left coarse filter 121, a left fine filter 122 and a left electronic pump oil suction port 126; the motor A1 is provided with a motor A oil outlet I10, a motor A high-temperature oil return area I11, a motor A oil outlet II12 and a motor A high-temperature oil return area II13; the right housing 3 is provided with a motor B4, a right oil cooler 6, a right electronic pump 130, a right coarse filter 131 and a right fine filter 132.

[0027] like Figure 2 The transmission structure includes an output shaft gear 81, an intermediate shaft pinion 82, an intermediate shaft gear 83, an input shaft pinion 84, an output shaft left bearing 85, an output shaft right bearing 86, an intermediate shaft left bearing 87, an intermediate shaft right bearing 88, an input shaft left bearing 89 and an input shaft right bearing 90; the output shaft gear 81, the intermediate shaft pinion 82, the intermediate shaft gear 83 and the input shaft pinion 84 are connected in sequence for transmission.

[0028] like Figure 3 The first oil return reuse module 20 is provided with an output shaft left oil return port 100, a guide plate A101, an output shaft left bearing oil guide groove 102 and an output shaft left bearing seat oil expansion groove 103.

[0029] The left oil return port 100 of the output shaft is used to receive the motor oil return from the high temperature oil return area Ⅰ11 of motor A.

[0030] The width, axial spacing and angle of the guide plate A101 can be adjusted according to the position and angle of the gear meshing point to adjust the flow rate of the motor return oil reaching the gear meshing point. The axial spacing of the guide plate A101 satisfies the formula L≥0.2×d, where d is the gear module; the angle of the guide plate A satisfies the formula Where V oil is the return oil flow rate, R is the gear radius, and the guide plate A is inclined at 25°±5°. By adjusting the angle, the oil film coverage rate on the gear surface can be improved and the oil coverage trajectory can be optimized.

[0031] The slot angle, width and depth of the oil guide groove 102 of the left bearing of the output shaft can be adjusted according to the bearing lubrication flow demand.

[0032] In order to ensure that the motor return oil smoothly enters the output shaft left bearing through the output shaft left bearing oil guide groove 102, the output shaft left bearing seat oil expansion groove 103 is opened in the output shaft left bearing seat.

[0033] like Figure 4 The second oil return reuse module 30 is provided with an intermediate shaft left oil return port 105 and an intermediate shaft left oil pouring port 106.

[0034] The left oil return port 105 of the intermediate shaft is used to receive the motor return oil from the high-temperature oil return area II 13 of motor A.

[0035] The left oil spray port 106 of the intermediate shaft cooperates with the left bearing seat of the intermediate shaft to directly guide the motor return oil from the high-temperature oil return area II13 of motor A into the left bearing 87 of the intermediate shaft. The position, shape and inclination angle of the left oil spray port 106 of the intermediate shaft can be adjusted according to the bearing lubrication flow and slope operation requirements.

[0036] Oil circuit connection relationship: motor oil outlet → high-temperature oil return area → oil return port → oil spray port and guide plate → bearing mounting seat and gear meshing area → oil pan → electronic pump oil suction port.

[0037] Specific implementation method of motor oil return directional reuse lubrication system:

[0038] Route 1: The return oil of motor A1 passes through the first oil return reuse module 20 to realize directional oil spraying lubrication of the gear meshing area of ​​the output shaft gear 81 and the intermediate shaft pinion 82 of the gearbox and the output shaft left bearing 85 of the gearbox; the oil outlet I10 of motor A reaches the high-temperature oil return area I11 of motor A, and the high-temperature return oil reaches the first oil return reuse module 20. The output shaft left return oil port 100 on the first oil return reuse module 20 reaches the guide plate A101 and the output shaft left bearing oil spraying port 102. The guide plate 101 guides the lubricating oil to the gear meshing area of ​​the output shaft of the gearbox. At the same time, the output shaft left bearing oil spraying port 102 sprays the lubricating oil into the gearbox output shaft left bearing 85 to perform oil spraying lubrication on the output shaft left bearing.

[0039] Route 2: The return oil of motor A1 is directed through the second oil return reuse module 30 to lubricate the left intermediate shaft bearing 87 of the gearbox; the oil outlet II12 of motor A reaches the high-temperature oil return area II13 of motor A, and the high-temperature return oil reaches the second oil return reuse module 30. The left intermediate shaft oil spraying port 106 on the second oil return reuse module 30 sprays the return oil of motor A into the left intermediate shaft bearing 87 of the gearbox, thereby lubricating the left intermediate shaft bearing 87 of the gearbox with oil.

[0040] Similarly, the directional reuse lubrication route for motor B's return oil is similar to that for motor A. Motor B's return oil passes through the third oil reuse module to provide targeted oil spraying lubrication to the gear meshing area between the gearbox intermediate shaft gear 83 and the input shaft pinion 84. Simultaneously, the oil spray port on the right intermediate shaft bearing sprays lubricating oil into the right intermediate shaft bearing 88 of the transmission, providing targeted oil spraying lubrication to the right intermediate shaft bearing. Motor B's return oil passes through the fourth oil reuse module 50 to provide targeted oil spraying lubrication to the right output shaft bearing 86 of the transmission.

[0041] This invention pioneers a cascaded utilization technology for motor return oil: high-temperature motor return oil is directly introduced into the transmission oil spray channel, achieving dual reuse of energy and oil. The motor return oil is directional and reused in the lubrication route: Motor A's return oil passes through the first oil return reuse module for directional oil spray lubrication of the transmission output shaft gear, the intermediate shaft pinion gear meshing area, and the transmission output shaft left bearing; Motor A's return oil passes through the second oil return reuse module for directional oil spray lubrication of the transmission intermediate shaft left bearing; Motor B's return oil passes through the third oil return reuse module for directional oil spray lubrication of the transmission intermediate shaft large gear, the input shaft pinion gear meshing area, and the transmission intermediate shaft right bearing; Motor B's return oil passes through the fourth oil return reuse module for directional oil spray lubrication of the transmission output shaft right bearing.

[0042] The adaptive oil spraying angle design of the present invention can adjust the width, axial spacing and angle of the guide plate A according to the position and angle of the gear meshing point to adjust the flow rate of the motor return oil reaching the gear meshing point. The axial spacing of the guide plate A satisfies the formula L≥0.2×d (d is the gear module), and the angle of the guide plate A satisfies the formula (V oil : return oil flow rate, R: gear radius), the guide plate A is tilted 25°±5°. By adjusting the angle, the oil film coverage rate on the gear surface can be improved and the oil coverage trajectory can be optimized.

[0043] This invention pioneers cascaded utilization of motor return oil, directing high-temperature motor return oil directly into the transmission oil spray channel. This achieves dual reuse of energy and oil, increasing motor return oil heat utilization by 40% and shortening transmission warm-up time by 50%. This reduces oil pump power and cooling requirements, optimizes lubrication, reduces wear, and improves system reliability. This reduces the frequency of oil changes and filter replacements, lowering maintenance costs. By optimizing the oil coverage trajectory with tilted guide plates (25°±5°), the oil film coverage on the gear surface increases from 60% to 95%, supporting operation on slopes of -30°-45°.

Claims

1. A directional multiplex lubrication system for high-temperature oil return of a motor, characterized by: The invention comprises a left housing (2), a right housing (3), a first oil return multiplexing module (20), a second oil return multiplexing module (30), a third oil return multiplexing module, a fourth oil return multiplexing module (50), a transmission structure and an oil pan (128); the left housing (2) is provided with a motor A (1), a left oil cooler (5), a left electronic pump (120), a left coarse filter (121), a left fine filter (122) and a left electronic pump oil suction port (126); the motor A (1) is provided with a motor A oil outlet I (10), a motor A high-temperature oil return area I (11), a motor A oil outlet II (12) and a motor A high-temperature oil return area II (13); the right housing (3) is provided with a motor B (4), a right oil cooler (6), a right electronic pump (130), a right coarse filter (131) and a right fine filter (132).

2. The directional multiplexing lubrication system for high-temperature oil return of a motor according to claim 1 is characterized in that: The transmission structure includes an output shaft gear (81), an intermediate shaft pinion (82), an intermediate shaft gear (83), an input shaft pinion (84), an output shaft left bearing (85), an output shaft right bearing (86), an intermediate shaft left bearing (87), an intermediate shaft right bearing (88), an input shaft left bearing (89) and an input shaft right bearing (90).

3. The directional multiplexing lubrication system for high-temperature oil return of a motor according to claim 2, characterized in that: The output shaft gear (81), the intermediate shaft pinion gear (82), the intermediate shaft gear (83), and the input shaft pinion gear (84) are connected in sequence for transmission.

4. The directional multiplexing lubrication system for high-temperature oil return of a motor according to claim 1 is characterized in that: The first oil return reuse module (20) is provided with an output shaft left oil return port (100), a guide plate A (101), an output shaft left bearing oil guide groove (102) and an output shaft left bearing seat oil expansion groove (103), and receives motor return oil from the high-temperature oil return zone I (11) of motor A through the output shaft left oil return port (100).

5. The directional multiplexing lubrication system for high-temperature oil return of a motor according to claim 1 is characterized in that: The second oil return reuse module (30) is provided with an intermediate shaft left oil return port (105) and an intermediate shaft left oil drip port (106), and receives the motor return oil from the high temperature oil return zone II (13) of motor A through the intermediate shaft left oil return port (105).

6. The directional multiplexing lubrication system for high-temperature oil return of a motor according to claim 4 or 5, characterized in that: The oil return of the motor A (1) is used to achieve directional oil spraying lubrication of the gear meshing area between the output shaft gear (81) and the intermediate shaft pinion (82) of the gearbox and the left bearing (85) of the output shaft of the gearbox through the first oil return reusing module (20), and the oil return of the motor A (1) is used to achieve directional oil spraying lubrication of the left bearing (87) of the intermediate shaft of the gearbox through the second oil return reusing module (30).

7. The directional multiplexing lubrication system for high-temperature oil return of a motor according to claim 4 or 5, characterized in that: The oil return from the motor B (4) is used to achieve directional oil spraying lubrication of the gear meshing area between the intermediate shaft gear (83) and the input shaft pinion (84) of the gearbox and the right bearing (88) of the intermediate shaft of the gearbox through the third oil return multiplexing module, and the oil return from the motor B is used to achieve directional oil spraying lubrication of the right bearing (86) of the output shaft of the gearbox through the fourth oil return multiplexing module (50).

8. The directional multiplexing lubrication system for high-temperature oil return of a motor according to claim 4, characterized in that: The axial spacing of the guide plate A (101) satisfies the formula L≥0.2×d, where d is the gear module; the angle of the guide plate A satisfies the formula Where V oil is the return oil flow rate, R is the gear radius, and the guide plate A is inclined at 25°±5°. By adjusting the angle, the oil film coverage rate on the gear surface can be improved and the oil coverage trajectory can be optimized.

9. The method for using the directional multiplexing lubrication system for high-temperature oil return of a motor according to claim 1, characterized in that: The return oil of the motor A (1) is directed to the gear meshing area of ​​the output shaft gear (81) and the intermediate shaft pinion (82) of the gearbox and the output shaft left bearing (85) of the gearbox through the first oil return reuse module (20); the oil outlet I (10) of the motor A reaches the high-temperature oil return area I (11) of the motor A, the high-temperature return oil reaches the first oil return reuse module (20), the output shaft left return oil port (100) on the first oil return reuse module (20) reaches the guide plate A (101) and the output shaft left bearing oil spraying port (102), the guide plate (101) guides the lubricating oil to the gear meshing area of ​​the output shaft of the gearbox, and at the same time, the output shaft left bearing oil spraying port (102) sprays the lubricating oil into the gearbox output shaft left bearing (85), thereby performing oil spraying lubrication on the output shaft left bearing; The return oil of the motor A (1) is directed to lubricate the left intermediate shaft bearing (87) of the gearbox through the second oil return reuse module (30); the oil outlet II (12) of the motor A reaches the high-temperature oil return area II (13) of the motor A, and the high-temperature return oil reaches the second oil return reuse module (30). The left intermediate shaft oil spraying port (106) on the second oil return reuse module (30) sprays the return oil of the motor A into the left intermediate shaft bearing (87) of the gearbox, thereby lubricating the left intermediate shaft bearing (87) of the gearbox through oil spraying.

10. The method for using the directional multiplexing lubrication system for high-temperature oil return of a motor according to claim 1, characterized in that: The directional multiplexing lubrication route of the motor B oil return corresponds to that of the motor A. The motor B oil return is used to achieve directional oil spraying lubrication of the gear meshing area between the gearbox intermediate shaft gear (83) and the input shaft pinion (84) through the third oil return multiplexing module. At the same time, the intermediate shaft right bearing oil spraying port sprays lubricating oil into the gearbox intermediate shaft right bearing (88), thereby performing directional oil spraying lubrication on the intermediate shaft right bearing. The motor B oil return is used to achieve directional oil spraying lubrication of the gearbox output shaft right bearing (86) through the fourth oil return multiplexing module (50).

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