Motor heat dissipation assembly of speed reducer for electric aircraft
By designing the motor heat dissipation assembly for electric aircraft reducers and using the circulating heat dissipation system of coolant and lubricant, the problem that the motor heat dissipation system in the prior art cannot effectively heat the reducer, and stable heat dissipation of the motor and reducers is achieved, and the service life of the reducer is extended.
Patent Information
- Application Number
- CN202421225924.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The existing motor cooling system cannot effectively heat the reducer, resulting in an increase in gear oil temperature, affecting the lubrication effect and shortening the service life of the reducer.
A motor heat dissipation assembly for a reducer for electric aircraft is designed, including a motor heat dissipation mechanism and a reducer heat dissipation mechanism. The motor heat dissipation mechanism uses coolant to circulate heat dissipation, while the reducer heat dissipation mechanism cooperates with oil cooler, thermostat and other components to achieve heat dissipation and cooling of the reducer.
While dissipating heat to the motor, the reducer effectively cools down the service life of the reducer and makes the operation of the motor and reducer more stable.
Smart Images
Figure CN222950383U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat dissipation systems, in particular to a motor heat dissipation assembly of a reducer for an electric aircraft. Background Art
[0002] An electric aircraft is an aircraft that uses electricity to drive it. Compared with traditional fuel aircraft, electric aircraft are environmentally friendly, low-noise, low-vibration, and do not require a thermal engine system. They have low maintenance costs and are suitable for personal flight and training purposes. The types of motors used in electric aircraft are mainly divided into three categories: brushless DC motors, brushed DC motors, and propeller generators. The motors used in electric aircraft are generally high-speed motors. In order to increase the torque of the motor, the motor is often used with a reducer to reduce the speed of the motor to increase the output torque of the motor.
[0003] The cooling system of conventional motors cannot dissipate the heat of the reducer. After long-term operation, the gear oil temperature will rise, affecting the lubrication effect of the gear oil on the internal gears of the reducer, thereby affecting the service life of the reducer.
[0004] Therefore, it is necessary to provide a motor heat dissipation assembly for a reducer for an electric aircraft to solve the above technical problems. Utility Model Content
[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a motor heat dissipation assembly of a reducer for an electric aircraft, which can dissipate heat for the motor and cool the reducer at the same time.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0007] The motor heat dissipation assembly of the reducer for electric aircraft includes: a motor heat dissipation mechanism and a reducer heat dissipation mechanism; the circulating medium of the motor heat dissipation mechanism is coolant, and the circulating medium of the reducer heat dissipation mechanism is lubricating oil. The reducer heat dissipation mechanism includes a main oil pump, a thermostat and an oil cooler connected to the reducer body in sequence, and the bypass line of the thermostat is directly connected to the reducer body. The lubricating oil is transported to the oil cooler through the main oil pump. After heat exchange, the lubricating oil flows back to the reducer body, absorbs the heat of the reducer body, and is transported again by the main oil pump to form a reducer heat dissipation cycle. It is worth mentioning that the lubricating oil not only has a heat dissipation function, but also can lubricate the gears in the reducer body; the motor heat dissipation mechanism includes a heat absorption component installed on the motor, and the heat absorption component is used to absorb the heat of the motor. The main water pump is installed at one end of the heat absorption component, and one end of the main water pump is connected to the radiator. The radiator is a water-cooled heat dissipation type The coolant in the radiator is connected to the oil cooler, one end of which is connected to the heat absorption component. The coolant in the radiator is transported to the heat absorption component on the motor through the main water pump, exchanges heat with the motor to form medium-temperature coolant, and then enters the oil cooler. After heat exchange with the high-temperature lubricating oil, it becomes high-temperature coolant. It is transported to the radiator through the pipeline. The high-temperature coolant exchanges heat with the air to become low-temperature coolant, which is transported to the heat absorption component by the main water pump again, forming a motor heat dissipation cycle. A first temperature sensor is installed on the heat absorption component to detect the temperature of the heat absorption component. A second temperature sensor is installed on the reducer body to detect the temperature of the lubricating oil in the reducer body.
[0008] Preferably, a backup water pump is installed in parallel on one side of the main water pump, so that when the main water pump is damaged, the backup water pump can be activated.
[0009] Preferably, a backup oil pump is installed in parallel on one side of the main oil pump. The backup oil pump is activated when the main oil pump fails to work and can replace the main oil pump to operate.
[0010] Preferably, an expansion water tank is installed in parallel on one side of the radiator, and the expansion water tank can stabilize the internal pressure of the circulating coolant in the heat dissipation mechanism of the reducer.
[0011] Preferably, the heat absorption component includes an outer shell, which is the shell of the motor. A water channel for the circulation of coolant is provided in the outer shell. Inlet and outlet pipes are installed at both ends of the water channel, and the coolant enters and exits from the inlet and outlet pipes at both ends of the water channel.
[0012] Preferably, the water channel comprises a spiral channel, the spiral channel is opened on the side wall of the shell, and both ends of the spiral channel are connected to the inlet and outlet liquid pipes.
[0013] Preferably, the water channel includes two annular channels and a plurality of straight channels distributed in an annular array, both ends of the straight channel are connected to the two annular channels, and the two annular channels are respectively connected to two inlet and outlet liquid pipes.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] (1) The utility model provides a motor heat dissipation mechanism and a reducer heat dissipation mechanism, and uses the circulating coolant of the motor heat dissipation mechanism to cool the circulating lubricating oil in the reducer heat dissipation mechanism. While dissipating the heat of the motor, the reducer can also be cooled, which is beneficial to prolonging the service life of the reducer and making the motor and reducer work more stably.
[0016] (2) The utility model provides a backup water pump to back up the main water pump, thereby improving the working stability of the motor heat dissipation mechanism;
[0017] (3) The utility model provides a backup oil pump to back up the main oil pump, making the reducer heat dissipation mechanism work more stably;
[0018] (4) The utility model can conveniently dissipate heat from the motor by providing a heat absorption component including a housing, a water channel, and an inlet and outlet liquid pipe;
[0019] (5) The utility model provides a spiral channel so that the coolant can move along the outer shell in a spiral manner to dissipate heat from the outer shell;
[0020] (6) The utility model provides a water channel including an annular hole and a straight channel, so that the coolant flows along the water channel formed by the annular hole and the straight channel to dissipate heat from the shell. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 A schematic diagram of the structure of the motor heat dissipation assembly of the reducer for an electric aircraft provided by the utility model;
[0022] Figure 2 for Figure 1 A schematic structural diagram of an embodiment of a housing in a motor heat dissipation assembly of a speed reducer for an electric aircraft is shown;
[0023] Figure 3 for Figure 1 A schematic structural diagram of an embodiment of a housing in a motor heat dissipation assembly of a speed reducer for an electric aircraft is shown;
[0024] Figure 4 for Figure 3 A schematic front cross-sectional structural diagram of the housing is shown.
[0025] Among them, the names corresponding to the figure marks are: 1-heat absorption component, 2-radiator, 3-main water pump, 4-oil cooler, 5-first temperature sensor, 6-reducer body, 7-main oil pump, 8-thermostat, 9-second temperature sensor, 10-backup water pump, 11-backup oil pump, 12-expansion water tank, 13-housing, 14-spiral channel, 15-inlet and outlet liquid pipes, 16-straight channel, 17-annular channel. DETAILED DESCRIPTION
[0026] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The present invention includes but is not limited to the following embodiments.
[0027] Embodiment 1:
[0028] like Figure 1-4As shown, the motor heat dissipation assembly of the reducer for electric aircraft provided by the utility model includes: a motor heat dissipation mechanism and a reducer heat dissipation mechanism; the circulating medium of the motor heat dissipation mechanism is coolant, and the circulating medium of the reducer heat dissipation mechanism is lubricating oil. The reducer heat dissipation mechanism includes a main oil pump 7, a thermostat 8 and an oil cooler 4 which are connected to the reducer body 6 in sequence, and the bypass line of the thermostat 8 is directly connected to the reducer body 6. The lubricating oil is transported to the oil cooler 4 through the main oil pump 7. After heat exchange, the lubricating oil flows back to the reducer body 6, and after absorbing the heat of the reducer body 6, it is transported again by the main oil pump 7 to form a reducer heat dissipation cycle. It is worth mentioning that the lubricating oil not only has a heat dissipation function, but also can lubricate the gears in the reducer body 6; the motor heat dissipation mechanism includes a main oil pump 7 installed in the motor. The heat absorbing component 1 on the machine is used to absorb the heat of the motor. A main water pump 3 is installed at one end of the heat absorbing component 1. One end of the main water pump 3 is connected to the radiator 2. The radiator 2 is a water-cooled radiator. One end of the radiator 2 is connected to the oil cooler 4. One end of the oil cooler 4 is connected to the heat absorbing component 1. The coolant in the radiator 2 is transported to the heat absorbing component 1 on the motor through the main water pump 3, and heat exchanges with the motor to form a medium-temperature coolant, and then enters the oil cooler 4, and after heat exchange with the high-temperature lubricating oil, it becomes a high-temperature coolant, and then passes through the pipeline to the radiator. 4. The high-temperature coolant exchanges heat with the air to become low-temperature coolant, which is then transported to the heat absorbing component 1 by the main water pump 3 to form a motor heat dissipation cycle. A first temperature sensor 5 is installed on the heat absorbing component 1 to detect the temperature of the heat absorbing component 1. A second temperature sensor 9 is installed on the reducer body 6 to detect the temperature of the lubricating oil in the reducer body 1. When in use, when it is detected that the temperature of the lubricating oil in the reducer body 6 is lower than the normal lubrication setting temperature, the bypass pipeline of the thermostat 8 is opened, and the lubricating oil does not pass through the oil cooler 4 for heat exchange, so that the lubricating oil is quickly heated up; when the temperature of the lubricating oil reaches the required cooling temperature, the bypass pipeline of the thermostat 8 is closed, and the high-temperature lubricating oil is normally heat exchanged through the oil cooler 4; when the motor is started, the main oil pump 7 is started synchronously to transport the lubricating oil to the reducer body 6 for gear lubrication; when the temperature of the lubricating oil reaches the required cooling temperature or the temperature of the motor reaches the required cooling temperature, the main water pump 3 is started to cool the motor while cooling the lubricating oil in the heat dissipation cycle of the reducer.
[0029] By setting up a motor heat dissipation mechanism and a reducer heat dissipation mechanism, the circulating coolant of the motor heat dissipation mechanism is used to cool the circulating lubricating oil in the reducer heat dissipation mechanism. While dissipating the heat of the motor, the reducer can also be cooled, which is beneficial to increasing the service life of the reducer and making the motor and reducer work more stably.
[0030] Embodiment 2:
[0031] like Figure 1As shown, a backup water pump 10 is installed in parallel on one side of the main water pump 3. When the main water pump 3 is damaged, the backup water pump 10 can be activated to continue to dissipate heat for the motor, so that the motor can work normally.
[0032] By providing a backup water pump 10, it can back up the main water pump 3 and improve the working stability of the motor heat dissipation mechanism.
[0033] Embodiment 3:
[0034] like Figure 1 As shown, a backup oil pump 11 is installed in parallel on one side of the main oil pump 7. The backup oil pump 11 has the same function as the backup water pump 10. The backup oil pump 11 is activated when the main oil pump 7 fails to work and can replace the main oil pump 7 to operate, so that the lubricating oil can circulate normally, thereby making the reducer heat dissipation mechanism work more stably.
[0035] By providing a backup oil pump 11, it can back up the main oil pump 7, so that the heat dissipation mechanism of the reducer can work more stably.
[0036] Embodiment 4:
[0037] like Figure 1 As shown, an expansion water tank 12 is installed in parallel on one side of the radiator 2. The expansion water tank 12 can stabilize the internal pressure of the circulating coolant in the reducer heat dissipation mechanism. Specifically, after the coolant increases in volume due to heat, the expansion water tank 1 absorbs the increased expansion of the coolant. After the temperature drops, the expansion water tank 1 releases the corresponding coolant to stabilize the pressure in the coolant circulation pipeline.
[0038] By providing the expansion water tank 12, the pressure in the coolant circulation pipeline can be stabilized by utilizing the expansion water tank 12, so that the operation of the reducer heat dissipation mechanism is more stable.
[0039] Embodiment 5:
[0040] like Figure 2-4 As shown, the heat absorption component 1 includes an outer shell 13, which is the shell of the motor, and a rotor, a coil, a magnetic steel, etc. are installed inside. A water channel for the circulation of coolant is provided in the outer shell 13, and inlet and outlet pipes 15 are installed at both ends of the water channel. The coolant enters and exits the inlet and outlet pipes 15 at both ends of the water channel to dissipate heat and cool the outer shell 13, and then cool the motor.
[0041] By providing a heat absorption component including a housing 13, a water channel and a liquid inlet and outlet pipe 15, the heat dissipation of the motor can be conveniently performed.
[0042] Embodiment 6:
[0043] like Figure 2As shown, the water channel includes a spiral channel 14, which is opened on the side wall of the shell 13. Both ends of the spiral channel 14 are connected to the inlet and outlet pipes 15. The coolant enters the spiral channel 14 from the inlet and outlet pipes 15, goes around the shell 13 for several circles, and is discharged from another inlet and outlet pipe 15, thereby dissipating heat and cooling the shell 13.
[0044] By providing the spiral channel 14 , the coolant can be allowed to spirally move along the outer shell 13 to dissipate heat from the outer shell 13 .
[0045] Embodiment 7:
[0046] like Figure 3-4 As shown, the water channel includes two annular channels 17 and a plurality of straight channels 16 distributed in an annular array. Both ends of the straight channel 16 are connected to the two annular channels 17. The two annular channels 17 are respectively connected to two inlet and outlet liquid pipes 15. When in use, the coolant enters the annular channel 17 through the inlet and outlet liquid pipes 15, then enters the straight channel 16 through the annular channel 17, and finally enters another annular channel 17 and is discharged from another inlet and outlet liquid pipe 15.
[0047] By providing a water channel including the annular hole 17 and the straight channel 16 , the coolant is allowed to flow along the water channel formed by the annular hole 17 and the straight channel 16 to dissipate heat from the housing 13 .
[0048] Working principle: When in use, the lubricating oil is transported to the oil cooler 4 through the main oil pump 7. After heat exchange, the lubricating oil flows back to the reducer body 6. After absorbing the heat of the reducer body 6, it is transported again by the main oil pump 7 to form a reducer heat dissipation cycle. It is worth noting that the lubricating oil not only has the heat dissipation function, but also can lubricate the gears in the reducer body 6;
[0049] The coolant in the radiator 2 is transported to the heat absorbing component 1 on the motor through the main water pump 3, and forms a medium-temperature coolant after exchanging heat with the motor, and then enters the oil cooler 4, and becomes a high-temperature coolant after exchanging heat with the high-temperature lubricating oil, and then passes through the pipeline to the radiator 4, and the high-temperature coolant exchanges heat with the air to become a low-temperature coolant, and then is transported to the heat absorbing component 1 by the main water pump 3 again, forming a motor heat dissipation cycle;
[0050] When it is detected that the temperature of the lubricating oil in the reducer body 6 is lower than the normal lubrication setting temperature, the bypass line of the thermostat 8 is opened, and the lubricating oil does not pass through the oil cooler 4 for heat exchange, thereby achieving rapid heating of the lubricating oil; when the temperature of the lubricating oil reaches the required cooling temperature, the bypass line of the thermostat 8 is closed, and the high-temperature lubricating oil undergoes normal heat exchange through the oil cooler 4; when the motor is started, the main oil pump 7 is started synchronously to transport the lubricating oil to the reducer body 6 for gear lubrication; when the lubricating oil temperature reaches the required cooling temperature or the motor temperature reaches the required cooling temperature, the main water pump is started to cool the motor while cooling the lubricating oil in the reducer heat dissipation cycle.
Claims
1. A motor heat dissipation assembly for a reducer for an electric aircraft, characterized in that: include: Motor heat dissipation mechanism and reducer heat dissipation mechanism; The reducer heat dissipation mechanism comprises a reducer body (6), a main oil pump (7), a thermostat (8) and an oil cooler (4); The motor heat dissipation mechanism comprises a heat absorption component (1), a main water pump (3) is installed at one end of the heat absorption component (1), a radiator (2) is installed at one end of the main water pump (3), the radiator (2) is connected to the oil cooler (4) at one end of the radiator (2), and the oil cooler (4) is connected to the heat absorption component (1); A first temperature sensor (5) is installed on the heat absorption component (1); A second temperature sensor (9) is installed on the reducer body (6).
2. The motor heat dissipation assembly of a reducer for an electric aircraft according to claim 1, characterized in that: A backup water pump (10) is installed in parallel on one side of the main water pump (3).
3. The motor heat dissipation assembly of a reducer for an electric aircraft according to claim 1, characterized in that: A backup oil pump (11) is installed in parallel on one side of the main oil pump (7).
4. The motor heat dissipation assembly of a reducer for an electric aircraft according to claim 1, characterized in that: An expansion water tank (12) is installed in parallel on one side of the radiator (2).
5. The motor heat dissipation assembly of a reducer for an electric aircraft according to claim 1, characterized in that: The heat absorption component (1) comprises an outer shell (13), a water channel is provided in the outer shell (13), and liquid inlet and outlet pipes (15) are installed at both ends of the water channel.
6. The motor heat dissipation assembly of a reducer for an electric aircraft according to claim 5, characterized in that: The water channel comprises a spiral channel (14).
7. The motor heat dissipation assembly of a reducer for an electric aircraft according to claim 5, characterized in that: The water channel comprises two annular holes (17) and a plurality of straight channels (16) distributed in an annular array.