Lubricating and cooling system suitable for motor and speed reducer integrated device

Abstract

The invention belongs to the technical field of lubrication and heat dissipation of integrated electric drive systems, and particularly relates to a lubrication and heat dissipation system suitable for a motor reducer integrated device. Comprising a casing (1), an oil circuit board (2) and a heat dissipation mechanism (3), the heat dissipation mechanism (3) comprises an integrated oil circuit on the upper side, a main radiator (8) and an auxiliary radiator (10), the main radiator (8) and the auxiliary radiator (10) are arranged on the lower side, and high-temperature lubricating oil passes through a lubricating oil pipeline of the oil circuit board (2) and then enters the main radiator (8) of the heat dissipation mechanism (3) through an oil inlet (7) of the main radiator; high-temperature lubricating oil passes through a lubricating oil pipeline of the oil way plate (2) and then enters an auxiliary radiator (10) of the heat dissipation mechanism (3) through an auxiliary radiator oil inlet (9), and low-temperature lubricating oil coming out of the auxiliary radiator (10) is directly injected into the bottom of an oil pool through an auxiliary radiator oil outlet (11); and low-temperature lubricating oil flowing out of the main radiator (8) enters the speed reducer through a pipeline and an oil port on the oil way plate (2) to radiate heat of the speed reducer, and is finally injected into the bottom of an oil pool.

Description

Technical Field

[0001] The present invention belongs to the technical field of lubrication and heat dissipation of integrated electric drive systems, and in particular relates to a lubrication and heat dissipation system suitable for an integrated motor reducer device. Background Art

[0002] China has made significant achievements in the new energy industry. With the development of electrification, helicopters will also usher in new opportunities. Unlike traditional helicopters, which are powered by fuel, new energy helicopters are powered by electricity. New energy helicopters are also called electric vertical take-off and landing aircraft. The motor-reducer integrated device is a drive device with a large power-to-weight ratio and high integration.

[0003] The reduction system in the motor reducer integrated device includes gears and bearings, which need to be lubricated and cooled during operation. The stator, rotor and controller of the motor will also generate excess heat during operation. If each system is lubricated separately, the volume and weight cost will be very high, so integrated lubrication and cooling technology should be considered. The integrated design of the motor reducer integrated device reduces the contact area between each component and the air, and increases the degree of thermal coupling between components. In order to ensure that each component of the motor reducer integrated device is in the normal operating temperature range under all working conditions, it is necessary to focus on the design of the entire lubrication and heat dissipation system. Summary of the invention

[0004] Purpose of the invention: To provide a lubrication and heat dissipation system suitable for a motor-reducer integrated device, ensuring that it is within a normal operating temperature range under all operating conditions.

[0005] Technical solution:

[0006] A lubrication and heat dissipation system suitable for an integrated motor reducer device comprises: a casing 1, an oil circuit board 2 and a heat dissipation mechanism 3, wherein the heat dissipation mechanism 3 comprises an integrated oil circuit on the upper side and a main radiator 8 and an auxiliary radiator 10 on the lower side.

[0007] The heat dissipation mechanism 3, the oil circuit board 2 and the casing 1 are connected in sequence; the casing 1 is provided with a lubricating oil pump 4, the upper side of the oil circuit board 2 is provided with an oil injection port 6 for installing an oil injection nozzle for splash lubrication, the oil circuit board 2 is provided with a lubricating oil pump oil outlet 5, a main radiator oil inlet 7, and a first auxiliary radiator oil outlet 11; the heat dissipation mechanism 3 is provided with an auxiliary radiator oil inlet 9 and a second auxiliary radiator oil outlet 31,

[0008] The lubricating oil pump 4 is responsible for pumping out the high-temperature lubricating oil in the reducer from the lubricating oil pump outlet 5; the lubricating oil pump outlet 5 and the main radiator oil inlet 7 are connected through the lubricating oil pipeline on the lower side of the oil circuit board 2, and the high-temperature lubricating oil passes through the lubricating oil pipeline of the oil circuit board 2 and then enters the main radiator 8 of the heat dissipation mechanism 3 through the main radiator oil inlet 7; the high-temperature lubricating oil passes through the lubricating oil pipeline of the oil circuit board 2 and then enters the auxiliary radiator 10 of the heat dissipation mechanism 3 through the auxiliary radiator oil inlet 9, and the low-temperature lubricating oil coming out of the auxiliary radiator 10 is directly injected into the bottom of the oil pool through the auxiliary radiator oil outlet 11; the low-temperature lubricating oil flowing out of the main radiator 8 enters the reducer through the pipelines and oil ports on the oil circuit board 2 to dissipate the heat of the reducer, and is finally injected into the bottom of the oil pool.

[0009] Furthermore, there are three auxiliary radiators 10 .

[0010] Furthermore, there are two fuel injection ports 6 .

[0011] Furthermore, a portion of the low-temperature lubricating oil flowing out of the main radiator 8 is injected into the motor oil jacket 13 from the motor heat dissipation oil inlet 12 to take away the heat generated by the motor stator 14. After the low-temperature lubricating oil comes out of the motor oil jacket 13, it is directly injected into the bottom of the oil pool through the main engine box lubricating oil pipeline.

[0012] Furthermore, another part of the low-temperature lubricating oil flowing out of the main radiator 8 flows into the casing lubricating oil pipeline from the gear lubrication oil inlet 28, and is simultaneously sprayed to the internal meshing and external meshing gear pairs of the planetary gear system through the first oil spray nozzle 15 on the casing oil spray port 6, lubricating the gear pairs and taking away the heat generated by the gears, and finally injected into the bottom of the oil pool.

[0013] Furthermore, another part of the low-temperature lubricating oil flowing out of the main radiator 8 flows into the casing lubricating oil pipeline from the bearing lubrication oil inlet 16, and is sprayed onto the oil collecting ring 18 through the second oil nozzle 17 on the lubricating oil pipeline. The low-temperature lubricating oil is thrown into the first planetary gear bearing 19 and the planetary gear shaft hole 20 respectively under the action of the centrifugal force of the oil collecting ring 18. The low-temperature lubricating oil flows in the planetary gear shaft hole 20, and under the action of the centrifugal force of the planetary gear, the low-temperature lubricating oil is thrown into the second planetary gear bearing 22. The low-temperature lubricating oil lubricates the bearings and takes away the heat generated by the bearings, and is finally injected into the bottom of the oil pool.

[0014] Furthermore, another part of the low-temperature lubricating oil flowing out of the main radiator 8 flows into the main casing lubricating oil pipeline from the bearing lubrication oil inlet 16, and is sprayed to the rotor shaft bearing 24 and the motor rotor bearing 25 through the third oil nozzle 23 on the lubricating oil pipeline, so as to lubricate the bearings and take away the heat generated by the bearings. At the same time, the low-temperature lubricating oil is thrown toward the motor stator 14 under the action of the centrifugal force of the rotor shaft and the planetary gear train sun gear 26, so as to take away the heat generated by the motor stator, and finally be injected into the bottom of the oil pool.

[0015] Furthermore, the oil inlet of the lubricating oil pump is located at the bottom of the oil pool.

[0016] Beneficial effects:

[0017] The lubrication and heat dissipation system suitable for a motor reducer integrated device of the present invention is a lubrication and heat dissipation system suitable for a motor reducer integrated device with a large power-to-weight ratio and high integration, which ensures that all components of the product are in a normal operating temperature range under all working conditions and realizes the functions and performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural appearance diagram of a lubrication and heat dissipation system suitable for a motor-reducer integrated device according to an embodiment of the present invention;

[0019] Figure 2 A structural stereogram of a lubrication and heat dissipation system suitable for a motor-reducer integrated device according to an embodiment of the present invention;

[0020] Figure 3 This is the upper structural diagram of the oil circuit board;

[0021] Figure 4 This is the structural diagram of the lower side of the oil circuit board;

[0022] Figure 5 The upper structural diagram of the heat dissipation mechanism

[0023] Figure 6 It is a top view of the motor reducer integrated device;

[0024] Figure 7 For along Figure 6 A cross-sectional view of line AA;

[0025] Figure 8 For along Figure 6 A cross-sectional view of the CC line;

[0026] Fig. 9 For along Figure 6 The cross-sectional view of line BB shows the oil flow direction at the oil collecting ring;

[0027] Fig.10 For along Figure 6 The cross-sectional view along line BB shows the oil flow direction at the planetary gear bearing;

[0028] Fig.11 For along Figure 6 The cross-sectional view of line BB shows the flow direction of lubricating oil at the bearings of the rotor shaft and the motor rotor;

[0029] Among them, the casing 1, the oil circuit board 2, the heat dissipation mechanism 3, the lubricating oil pump 4, the lubricating oil pump oil outlet 5, the oil injection port 6, the main radiator oil inlet 7, the main radiator 8, the auxiliary radiator oil inlet 9, the auxiliary radiator 10, the first auxiliary radiator oil outlet 11, the motor heat dissipation oil inlet 12, the motor oil sleeve 13, the motor stator 14, the first oil injection nozzle 15, the bearing lubrication oil inlet 16, the second oil injection nozzle 17, the oil collecting ring 18, the first planetary gear bearing 19, the planetary gear shaft hole 20, the third oil injection nozzle 23, the rotor shaft bearing 24, the motor rotor bearing 25, the planetary gear train sun gear 26, the gear lubrication oil inlet 28, and the second auxiliary radiator oil outlet 31. DETAILED DESCRIPTION

[0030] like Figure 1-11 The integrated lubrication and heat dissipation system is mainly composed of a casing 1, an oil circuit board 2 and a heat dissipation mechanism 3. In order to improve the product integration, the casing 1, the oil circuit board 2 and the heat dissipation mechanism 3 are directly connected by fasteners.

[0031] An oil pump 4 and a lubricating oil circuit are installed in the casing 1 . The oil pump 4 is responsible for pumping the high-temperature oil in the reducer out from the oil pump outlet 5 .

[0032] There are two oil injection ports 6 on the upper side of the oil circuit board 2, and oil injection nozzles can be installed for splash lubrication. The lower side of the oil circuit board 2 is an integrated oil circuit, and a part of the high-temperature lubricating oil can pass through the oil circuit board 2 lubricating oil pipeline and then enter the main radiator 8 of the heat dissipation mechanism 3 through the main radiator oil inlet 7; another part of the high-temperature lubricating oil passes through the oil circuit board 2 lubricating oil pipeline and then enters the auxiliary radiator 10 of the heat dissipation mechanism 3 through the auxiliary radiator oil inlet 9.

[0033] The heat dissipation mechanism 3 includes an integrated oil circuit on the upper side and a main radiator 8 and three auxiliary radiators 10 on the lower side. The high-temperature lubricating oil is converted into low-temperature lubricating oil after being radiated by the main radiator 8 and the auxiliary radiator 10. The low-temperature lubricating oil is radiated for the reducer through the integrated oil circuit on the lower side of the oil circuit plate 2, the integrated oil circuit on the upper side of the heat dissipation mechanism 3, and the oil circuit of the casing 1.

[0034] The airflow generated by the rotation of the rotor can provide cold air to the main radiator 8 and take away the heat of the main radiator 8.

[0035] The three auxiliary radiators 10 can dissipate heat for the controller power devices installed on the auxiliary radiators 10. After the low-temperature lubricating oil comes out of the auxiliary radiator, it is directly injected into the bottom of the oil pool through the auxiliary radiator oil outlet 11.

[0036] A portion of the low-temperature lubricating oil flowing out of the main radiator 8 is injected into the motor oil jacket 13 from the motor heat dissipation oil inlet 12 to take away the heat generated by the motor stator 14. After the low-temperature lubricating oil comes out of the motor oil jacket 13, it is directly injected into the bottom of the oil pool through the main engine box lubricating oil pipeline.

[0037] The other part of the low-temperature lubricating oil flowing out of the main radiator 8 flows into the casing lubricating oil pipeline from the gear lubrication oil inlet 28, and is simultaneously sprayed to the inner meshing and outer meshing gear pairs of the planetary gear train through the first oil spray nozzle 15 on the casing oil spray port 6, lubricating the gear pairs and taking away the heat generated by the gears, and finally injected into the bottom of the oil pool.

[0038] Another part of the low-temperature lubricating oil flowing out of the main radiator 8 flows into the casing lubricating oil pipeline from the bearing lubricating oil inlet 16, and is sprayed onto the oil collecting ring 18 through the second oil spray nozzle 17 on the lubricating oil pipeline. The low-temperature lubricating oil is thrown into the first planetary gear bearing 19 and the planetary gear shaft hole 20 respectively under the action of the centrifugal force of the oil collecting ring 18. The low-temperature lubricating oil flows in the planetary gear shaft hole 20. Under the action of the centrifugal force of the planetary gear, the low-temperature lubricating oil is thrown into the second planetary gear bearing 22. The low-temperature lubricating oil lubricates the bearing and takes away the heat generated by the bearing, and finally flows into the bottom of the oil pool.

[0039] Another part of the low-temperature lubricating oil flowing out of the main radiator 8 flows into the main casing lubricating oil pipeline from the bearing lubrication oil inlet 16, and is sprayed to the rotor shaft bearing 24 and the motor rotor bearing 25 through the third oil nozzle 23 on the lubricating oil pipeline, so as to lubricate the bearings and take away the heat generated by the bearings. At the same time, the low-temperature lubricating oil is thrown toward the motor stator 14 under the action of the centrifugal force of the rotor shaft and the planetary gear train sun gear 26, so as to take away the heat generated by the motor stator and finally be injected into the bottom of the oil pool.

[0040] The lubrication and cooling system adopts an integrated design, and the lubricating oil and coolant use the same medium.

[0041] The oil inlet of the lubricating oil pump is located at the bottom of the oil pool to ensure that the product can absorb the lubricating cooling medium under all working conditions.

[0042] The innovative features of the present invention are as follows:

[0043] 1) Applicable to the motor reducer integrated device working in any posture;

[0044] 2) The lubrication and cooling system adopts an integrated design, and the lubricating oil and coolant use the same medium;

[0045] 3) The cooling system includes 1 main radiator and 3 auxiliary radiators. The airflow generated by the rotation of the rotor passes through the main radiator to dissipate heat for the entire product, and the auxiliary radiators dissipate heat for the power devices of the controller;

[0046] 4) To improve product integration, the main radiator and auxiliary radiator are integrated into one base plate;

[0047] 5) The cooled lubricating and cooling medium flows into the parts that need lubrication and cooling through multiple pipelines;

[0048] 6) The cooling methods of the motor include oil jacket cooling and oil throwing cooling;

[0049] 7) In order to improve the lubrication efficiency of the planetary gear bearings, a special oil collecting ring is designed.

Claims

1. A lubrication and heat dissipation system suitable for a motor reducer integrated device, characterized in that: include: A casing (1), an oil circuit board (2) and a heat dissipation mechanism (3), wherein the heat dissipation mechanism (3) comprises an integrated oil circuit on the upper side and a main radiator (8) and an auxiliary radiator (10) on the lower side. The heat dissipation mechanism (3), the oil circuit board (2) and the casing (1) are connected in sequence; a lubricating oil pump (4) is installed in the casing (1); an oil injection port (6) is provided on the upper side of the oil circuit board (2) for installing an oil injection nozzle for splash lubrication; an oil pump oil outlet (5), a main radiator oil inlet (7) and a first auxiliary radiator oil outlet (11) are provided on the oil circuit board (2); an auxiliary radiator oil inlet (9) and a second auxiliary radiator oil outlet (31) are provided on the heat dissipation mechanism (3); The lubricating oil pump (4) is responsible for pumping out the high-temperature lubricating oil in the reducer from the lubricating oil pump outlet (5); the lubricating oil pump outlet (5) and the main radiator oil inlet (7) are connected through the lubricating oil pipeline on the lower side of the oil circuit board (2); the high-temperature lubricating oil passes through the lubricating oil pipeline of the oil circuit board (2) and then enters the main radiator (8) of the heat dissipation mechanism (3) through the main radiator oil inlet (7); the high-temperature lubricating oil passes through the lubricating oil pipeline of the oil circuit board (2) and then enters the auxiliary radiator (10) of the heat dissipation mechanism (3) through the auxiliary radiator oil inlet (9); the low-temperature lubricating oil coming out of the auxiliary radiator (10) is directly injected into the bottom of the oil pool through the auxiliary radiator oil outlet (11); the low-temperature lubricating oil flowing out of the main radiator (8) respectively enters the reducer through the pipeline and the oil port on the oil circuit board (2) to dissipate heat in the reducer, and finally is injected into the bottom of the oil pool.

2. The lubrication and heat dissipation system according to claim 1, characterized in that: There are three auxiliary radiators (10).

3. The lubrication and heat dissipation system according to claim 1, characterized in that: There are two oil injection ports (6).

4. The lubrication and heat dissipation system according to claim 1, characterized in that: A portion of the low-temperature lubricating oil flowing out of the main radiator (8) is injected into the motor oil jacket (13) from the motor heat dissipation oil inlet (12) to take away the heat generated by the motor stator (14). After the low-temperature lubricating oil flows out of the motor oil jacket (13), it is directly injected into the bottom of the oil pool through the main engine box lubricating oil pipeline.

5. The lubrication and heat dissipation system according to claim 1, characterized in that: Another part of the low-temperature lubricating oil flowing out of the main radiator (8) flows into the casing lubricating oil pipeline from the gear lubrication oil inlet (28), and is simultaneously sprayed to the inner meshing and outer meshing gear pairs of the planetary gear train through the first oil spray nozzle (15) on the casing oil spray port (6), lubricating the gear pairs and taking away the heat generated by the gears, and finally injected into the bottom of the oil pool.

6. The lubrication and heat dissipation system according to claim 1, characterized in that: Another part of the low-temperature lubricating oil flowing out of the main radiator (8) flows into the casing lubricating oil pipeline from the bearing lubricating oil inlet (16), and is sprayed onto the oil collecting ring (18) through the second oil spray nozzle (17) on the lubricating oil pipeline. Under the action of the centrifugal force of the oil collecting ring (18), the low-temperature lubricating oil is respectively thrown into the first planetary gear bearing (19) and the planetary gear shaft hole (20). The low-temperature lubricating oil flows in the planetary gear shaft hole (20), and under the action of the centrifugal force of the planetary gear, the low-temperature lubricating oil is thrown into the second planetary gear bearing (22). The low-temperature lubricating oil lubricates the bearing and takes away the heat generated by the bearing, and finally flows into the bottom of the oil pool.

7. The lubrication and heat dissipation system according to claim 1, characterized in that: Another part of the low-temperature lubricating oil flowing out of the main radiator (8) flows into the main engine case lubricating oil pipeline from the bearing lubricating oil inlet (16), and is respectively sprayed to the rotor shaft bearing (24) and the motor rotor bearing (25) through the third oil injection nozzle (23) on the lubricating oil pipeline to lubricate the bearings and take away the heat generated by the bearings. At the same time, the low-temperature lubricating oil is thrown toward the motor stator (14) under the action of the centrifugal force of the rotor shaft and the planetary gear train sun gear (26), taking away the heat generated by the motor stator, and finally injected into the bottom of the oil pool.

8. The lubrication and heat dissipation system according to claim 1, characterized in that: The oil inlet of the lubricating oil pump is located at the bottom of the oil pool.

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