Hybrid cooling device for new energy permanent magnet motor

Abstract

The utility model relates to a new energy permanent magnet motor mixed type cooling device relates to motor technical field, it is with the structure of oil water mixed cooling to satisfy the motor of greater power and greater torque. The new energy permanent magnet motor mixed type cooling device, including: the casing, and with the rear end cover of casing connection, and the upper portion of rear end cover installs waterproof breather valve, the casing and the rear end cover all are provided with oil channel and water channel, and the outside of casing is equipped with oil cooler for cooling oil liquid and cooling water temperature reduction, specifically, the oil filter core is assembled in the oil tank of casing, and the outside of oil tank of casing is fastened with oil pump through screw.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a hybrid cooling device for a new energy permanent magnet motor. Background Technology

[0002] Currently, new energy permanent magnet motors are mainly used in new energy vehicles. They are one of the core components and key parts of the new energy vehicle drive system, driving the drive wheels through mechanical transmission devices such as reducers, drive shafts, differentials, and half shafts.

[0003] When a vehicle decelerates, the motor acts as a brake to keep the vehicle moving forward. At this time, the motor is in generator mode, charging the energy storage power source. This is called regenerative braking.

[0004] However, most motors on the market are currently water-cooled motors, and the water-cooling structure cannot meet the heat dissipation requirements of high-power motors. Utility Model Content

[0005] The purpose of this utility model is to provide a hybrid cooling device for a new energy permanent magnet motor, which adopts an oil-water hybrid cooling structure to meet the needs of motors with greater power and greater torque.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A hybrid cooling device for a new energy permanent magnet motor includes: a housing and a rear end cover connected to the housing, wherein a waterproof and breathable valve is installed on the upper part of the rear end cover; both the housing and the rear end cover are provided with oil channels and water channels, and an oil cooler is installed on the outside of the housing to reduce the temperature of the cooling oil and cooling water.

[0008] Specifically, an oil filter element is installed in the oil trough of the housing, and an oil pump is fixed to the outside of the oil trough of the housing by screws.

[0009] In practical applications, the new energy permanent magnet motor hybrid cooling device further includes: a main shaft, the braking assembly of the main shaft is provided with an internal spline groove, and the center of the main shaft with rotor laminations is provided with a central oil passage, and oil holes are provided at both ends of the central oil passage;

[0010] The housing has water channels arranged radially around its circumference, allowing cooling water from the vehicle system to enter the water channels through a connector on the housing and exit through another connector; the housing also has oil channels arranged axially.

[0011] The rear end cover has two oil passages at its center. One oil passage is connected to the central oil passage of the main shaft, and the other oil passage is connected to the oil passage of the housing.

[0012] The rear end cover has a conductive ring installed in its conductive ring position, and the conductive ring is connected to the rotor.

[0013] The encoder is fastened to the rear end cover with screws, and the encoder's wiring harness is connected to the low-voltage connector through the wiring harness channel of the rear end cover.

[0014] The rear end cover, which contains a wave spring and is locked to the housing by a first bolt and a combination washer, is press-fitted between the rear end cover and the wound stator core with an oil injection ring.

[0015] Specifically, the winding stator core is press-fitted inside the housing, the rotor core is thermally fitted onto the main shaft, and the two ends of the main shaft are respectively press-fitted with a first deep groove ball bearing and a second deep groove ball bearing, and are equipped with shaft retaining rings.

[0016] The rotor with the bearings press-fitted is assembled into the bearing chamber of the front cover, and the front cover and bearing pressure plate are locked with screws.

[0017] Furthermore, a single-lip skeleton oil seal is fitted to the oil seal position of the front end cover, and the front end cover with the rotor installed is assembled to the housing, and the front end cover is locked to the housing by bolts.

[0018] Furthermore, the rear end cover is fastened to the first junction box cover and the second junction box cover by a second bolt and a combination washer, and the terminal block is fastened to the junction box position of the rear end cover by screws and is equipped with a waterproof connector.

[0019] The junction box of the rear cover is also secured with a third bolt and a combination washer.

[0020] Furthermore, the rear end cover is equipped with an explosion-proof valve, as well as an internal hexagonal plug and a round oil level indicator;

[0021] The housing is fitted with a right-angle connector by screws.

[0022] Compared with existing technologies, the hybrid cooling device for new energy permanent magnet motors described in this utility model has the following advantages:

[0023] The hybrid cooling device for new energy permanent magnet motors provided by this utility model achieves internal and external pressure balance by installing a waterproof and breathable valve on the upper part of the rear end cover. Oil and water channels are provided on both the housing and the rear end cover, and an oil cooler is installed on the outside of the housing to reduce the temperature of the cooling oil and water. Specifically, an oil filter element is installed in the oil tank of the housing, and an oil pump is secured to the outside of the oil tank with screws. Therefore, the rear end cover allows cooling oil to enter the motor, and the oil pump and oil cooler enable the cooling liquid to circulate inside and outside the motor, effectively increasing the contact area between the cooling liquid and the motor interior, achieving forced cooling, and reducing the likelihood of a significant decrease in motor temperature rise. This shortens the spindle length, reduces processing steps and difficulty, effectively solves the problem of high-probability motor overheating, ensures safer and more efficient motor operation, and effectively reduces shaft current, meeting the requirements of frequency conversion speed regulation for new energy permanent magnet motors. Attached Figure Description

[0024] Figure 1 A schematic diagram of the structure of the hybrid cooling device for a new energy permanent magnet motor provided in this embodiment of the utility model;

[0025] Figure 2 A schematic diagram of the structure of the hybrid cooling device for a new energy permanent magnet motor provided in this embodiment of the utility model.

[0026] Figure label:

[0027] 1- Rear end cover; 2- Second bolt and combined washer; 3- First junction box cover; 4- Encoder; 5- Conductive ring; 6- Wave spring; 7- First deep groove ball bearing; 8- Second junction box cover; 9- Terminal block; 10- Third junction box cover; 11- Third bolt and combined washer; 12- Housing; 13- Front end cover; 14- Bolt; 15- Stator core with windings; 16- Bearing pressure plate; 17- Rotor core; 18- Single lip skeleton oil seal; 19- Second deep groove ball bearing; 20- Main shaft; 21- Oil filter element; 22- Oil injection ring; 23- First bolt and combined washer; 24- Oil pump; 25- Round oil level indicator; 26- Hex socket screw plug; 27- Right angle connector; 28- Explosion-proof valve; 29- Oil cooler. Detailed Implementation

[0028] For ease of understanding, the hybrid cooling device for a new energy permanent magnet motor provided in this utility model embodiment will be described in detail below with reference to the accompanying drawings.

[0029] This utility model embodiment provides a hybrid cooling device for a new energy permanent magnet motor, such as... Figure 1 and Figure 2As shown, it includes: a housing 12, and a rear end cover 1 connected to the housing 12, and a waterproof and breathable valve is installed on the upper part of the rear end cover 1; both the housing 12 and the rear end cover 1 are provided with oil passages and water passages, and an oil cooler 29 is installed on the outside of the housing 12 to reduce the temperature of the cooling oil and cooling water.

[0030] Specifically, an oil filter element 21 is installed in the oil tank of the housing 12, and an oil pump 24 is fastened to the outside of the oil tank of the housing 12 by screws.

[0031] Compared with the prior art, the hybrid cooling device for new energy permanent magnet motors described in this embodiment of the invention has the following advantages:

[0032] In the hybrid cooling device for the new energy permanent magnet motor provided in this embodiment, a waterproof and breathable valve is installed on the upper part of the rear end cover 1, which enables the new energy permanent magnet motor to achieve internal and external pressure balance. Oil channels and water channels are provided on both the housing 12 and the rear end cover 1, and an oil cooler 29 is installed on the outside of the housing 12 to reduce the temperature of the cooling oil and water. Specifically, an oil filter element 21 is installed in the oil tank of the housing 12, and an oil pump 24 is fastened to the outside of the oil tank of the housing 12 by screws. Therefore, the cooling oil can enter the motor through the rear end cover 1, and the cooling liquid can circulate inside and outside the motor through the oil pump 24 and the oil cooler 29, thereby effectively increasing the contact area between the cooling liquid and the inside of the motor, achieving forced cooling, realizing the possibility of reducing the probability of motor temperature rise, thus shortening the length of the spindle, reducing processing steps and processing difficulty, effectively solving the problem of high probability motor overheating during operation, ensuring safer and more efficient motor operation, and effectively reducing shaft current to meet the requirements of frequency conversion speed regulation of the new energy permanent magnet motor.

[0033] In practical applications, such as Figure 1 and Figure 2 As shown, the new energy permanent magnet motor hybrid cooling device provided in this utility model embodiment may further include: a main shaft 20, the braking assembly of the main shaft 20 is provided with an internal spline groove, and the center of the main shaft 20 with rotor laminations is provided with a central oil passage, and oil holes are provided at both ends of the central oil passage.

[0034] The aforementioned housing 12 has water channels arranged around its radial circumference, allowing cooling water from the vehicle system to enter the water channels of the housing 12 through a connector on the housing 12 and exit through a connector on the other end; oil channels are arranged along the axial direction of the housing 12.

[0035] The rear end cover 1 has two oil passages in the center. One oil passage is connected to the central oil passage of the main shaft 20, and the other oil passage is connected to the oil passage of the housing 12.

[0036] Among them, such as Figure 1 and Figure 2As shown, a conductive ring 5 is installed in the conductive ring position of the rear end cover 1, and the conductive ring 5 is connected to the rotor.

[0037] The encoder 4 is fastened to the rear cover 1 with screws, and the wiring harness of the encoder 4 is connected to the low-voltage connector through the wiring harness channel of the rear cover 1.

[0038] The rear end cover 1, which contains the wave spring 6 and is locked to the housing 12 by the first bolt and the combined washer 23, is press-fitted between the rear end cover 1 and the wound stator core 15 with an oil injection ring 22.

[0039] Specifically, such as Figure 1 and Figure 2 As shown, the above-mentioned housing 12 is press-fitted with the above-mentioned winding stator core 15, the rotor core 17 is hot-fitted onto the main shaft 20, and the two ends of the main shaft 20 are respectively press-fitted with the first deep groove ball bearing 7 and the second deep groove ball bearing 19, and are equipped with shaft retaining rings.

[0040] The rotor with the bearings press-fitted is assembled into the bearing chamber of the front cover 13, and the front cover 13 and the bearing pressure plate 16 are locked with screws.

[0041] Furthermore, such as Figure 1 and Figure 2 As shown, the single-lip skeleton oil seal 18 is assembled at the oil seal position of the front cover 13, and the front cover 13 with the rotor installed is assembled at the housing 12. The front cover 13 and the housing 12 are locked together by bolts 14.

[0042] Furthermore, such as Figure 1 and Figure 2 As shown, the rear end cover 1 is fastened to the first junction box cover 3 and the second junction box cover 8 by the second bolt and the combination washer 2. The terminal block 9 is fastened to the junction box position of the rear end cover 1 by screws and is equipped with a waterproof connector.

[0043] The junction box of the rear cover 1 is also secured with a third bolt and a combination washer 11 to the third junction box cover 10.

[0044] Furthermore, such as Figure 1 and Figure 2 As shown, the aforementioned rear end cover 1 is equipped with an explosion-proof valve 28, as well as an internal hexagonal plug 26 and a round oil gauge 25.

[0045] The aforementioned housing 12 is fitted with right-angle connectors 27 by screws.

[0046] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A hybrid cooling device for a new energy permanent magnet motor, characterized in that, include: The housing and the rear end cover connected to the housing are provided with a waterproof and breathable valve installed on the upper part of the rear end cover. Both the housing and the rear end cover are provided with oil passages and water passages. An oil cooler is installed on the outside of the housing to reduce the temperature of the cooling oil and cooling water. Specifically, an oil filter element is installed in the oil trough of the housing, and an oil pump is fixed to the outside of the oil trough of the housing by screws.

2. The hybrid cooling device for new energy permanent magnet motors according to claim 1, characterized in that, Also includes: The spindle has an internal spline groove at its brake assembly and a central oil passage at the center of the spindle with rotor laminations, and oil holes at both ends of the central oil passage. The housing has water channels arranged radially around its circumference, allowing cooling water from the vehicle system to enter the water channels through a connector on the housing and exit through another connector; the housing also has oil channels arranged axially. The rear end cover has two oil passages at its center. One oil passage is connected to the central oil passage of the main shaft, and the other oil passage is connected to the oil passage of the housing.

3. The hybrid cooling device for new energy permanent magnet motors according to claim 2, characterized in that, A conductive ring is installed in the conductive ring position of the rear end cover, and the conductive ring is connected to the rotor; The encoder is fastened to the rear end cover with screws, and the encoder's wiring harness is connected to the low-voltage connector through the wiring harness channel of the rear end cover. The rear end cover, which contains a wave spring and is locked to the housing by a first bolt and a combination washer, is press-fitted between the rear end cover and the wound stator core with an oil injection ring.

4. The hybrid cooling device for new energy permanent magnet motors according to claim 3, characterized in that, The winding stator core is press-fitted inside the housing, the rotor core is heat-fitted onto the main shaft, and the two ends of the main shaft are respectively press-fitted with a first deep groove ball bearing and a second deep groove ball bearing, and are equipped with shaft retaining rings. The rotor with the bearings press-fitted is assembled into the bearing chamber of the front cover, and the front cover and bearing pressure plate are locked with screws.

5. The hybrid cooling device for new energy permanent magnet motors according to claim 4, characterized in that, A single-lip skeleton oil seal is fitted to the oil seal position of the front end cover, and the front end cover with the rotor installed is assembled to the housing. The front end cover is then locked to the housing with bolts.

6. The hybrid cooling device for new energy permanent magnet motors according to claim 5, characterized in that, The rear end cover is fastened to the first junction box cover and the second junction box cover by a second bolt and a combination washer. The terminal block is fastened to the junction box position of the rear end cover by screws and is equipped with a waterproof connector. The junction box of the rear cover is also secured with a third bolt and a combination washer.

7. The hybrid cooling device for new energy permanent magnet motors according to claim 6, characterized in that, An explosion-proof valve is installed at the rear end cover, along with an internal hexagonal plug and a round oil level indicator. The housing is fitted with a right-angle connector by screws.

Images