Motor rotor cooling system for electrically driven assembly
A technology of motor rotor and cooling system, which is applied to the arrangement of cooling combination of power units, motors, electric vehicles, etc., can solve the problems of unfavorable integrated design of electric drive assembly, small cooling liquid heat exchange area, insufficient cooling effect, etc. , to achieve the effect of reducing the structural quality, ensuring the cooling effect, and reducing the quality
Active Publication Date: 2020-01-31
NINGBO PHASE MOTION CONTROL
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Problems solved by technology
This solution adopts the form of an external coolant circuit, which needs to be installed and fixed, which takes up a large space, which is not conducive to the integrated design of the electric drive assembly; The liquid heat exchange area is small and the cooling effect is insufficient
Method used
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Embodiment Construction
[0023] The following is based on Figure 2 to Figure 5 The specific embodiment of the present invention is further described:
[0024] This embodiment provides a motor rotor cooling system for an electric drive assembly, such as figure 2 As shown, it includes pump 1, oil pan 3, motor rotor, reducer hollow input shaft 2, motor casing 9, bearing 10 at the front end of reducer hollow input shaft 2, bearing 10 at the rear end of reducer hollow input shaft 2, and reducer Housing 11 , motor rear housing 12 , reducer differential assembly 13 , reducer intermediate shaft assembly 14 .
[0025] Such as figure 2 As shown, the motor rotor in this embodiment includes a motor rotor laminated iron core and a motor hollow shaft 8 fixed inside the motor rotor laminated iron core. The oil suction port of the pump 1 is immersed in the oil pan 3, and the pump 1 The oil outlet is sealingly connected with one end of the hollow input shaft 2 of the reducer, and the other end of the hollow inpu...
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The invention discloses a motor rotor cooling system for an electrically driven assembly. The motor rotor cooling system comprises a pump, an oil bottom shell, a motor rotor and a speed reducer hollowinput shaft, wherein the motor rotor comprises a motor rotor lamination iron core and a motor hollow rotary shaft; the oil suction hole of the pump is dipped in the oil bottom shell, and the oil outlet of the pump is in sealing connection with the speed reducer hollow input shaft; the speed reducer hollow input shaft is inserted into the inner hole of the motor hollow rotary shaft and is connected with the motor hollow rotary shaft through a spline structure; an oil channel is arranged in the motor rotor lamination iron core; the motor hollow rotary shaft is independently provided with a front-row oil outlet and a back-row oil outlet, which communicate with the oil channel; the front-row oil outlet communicates with the one end of the speed reducer hollow input shaft; and the back-row oiloutlet communicates with the oil bottom shell through a gap between the motor hollow rotary shaft and the speed reducer hollow input shaft and the spline structure in sequence. By use of a built-in cooling liquid circuit, a heat exchange area between a cooling liquid and the motor rotor can be improved, cooling efficiency is drastically improved, and cooling liquid circulation is efficiently realized.
Description
technical field [0001] The invention relates to a cooling system for an electric drive assembly of a new energy vehicle, in particular to a cooling system for a motor rotor of an electric drive assembly. Background technique [0002] Under the development theme of energy saving and environmental protection, the state has issued many support policies for new energy vehicles, and the technology of new energy vehicles continues to be iteratively updated, especially the integration of pure electric drive vehicle powertrain is getting higher and higher, requiring electric drive assembly Provide power more efficiently, and bring higher challenges to the cooling performance of the powertrain. At present, the motor cooling system of the electric drive assembly is mainly aimed at the motor stator, and the thermal management of the motor rotor will become an important topic of motor cooling. The motor will generate a lot of heat under extreme working conditions such as holding on a s...
Claims
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IPC IPC(8): B60K11/02
CPCB60K11/02Y02T10/64
Inventor 杨先时牛波牛正蕊应迎策
Owner NINGBO PHASE MOTION CONTROL