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Oil-gas double-cooling motor

A technology of oil and gas, motor shaft, applied in the direction of electrical components, electromechanical devices, electric components, etc., can solve the problems of poor cooling effect of cooling oil, large motor current, reducing the cruising range of electric vehicles and the performance of the whole machine, etc., which is conducive to maintenance. Installation, the effect of ensuring the strength

Pending Publication Date: 2021-12-14
李绵军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The liquid-cooled motor in the prior art has no cooling oil heat dissipation circulation system and oil-liquid separation system, so that the motor is prone to high temperature. If there is no oil-liquid separation system, the oil in the air gap of the stator and rotor cannot be discharged at all, and it will Rotating oil resistance is generated, a little more oil, or the higher the speed, the greater the resistance, which will undoubtedly reduce the mileage and overall performance of the electric vehicle
Therefore, the solution is to add less cooling oil to reduce oil resistance loss, but the cooling effect of less cooling oil is very poor, especially when encountering continuous steep slopes in hills and mountainous areas, the motor current is large and the winding generates heat. Rapid increase, the temperature inside the machine rises rapidly, not only the temperature of the cooling oil rises, but also the pressure in the inner cavity of the motor increases, the internal and external pressure of the motor becomes unbalanced, and the cooling oil in the machine immediately generates steam pressure. When the steam pressure is released, it is easier to pass through the cable outlet , oil seal and other sealing components leak oil to the outside of the motor. The above are the pain points and common problems of the oil-cooled motor in the prior art, which will speed up the consumption of cooling oil and make the motor lose the protective effect of cooling oil.
In the current liquid-cooled motor, the difficult problem of exhaust and oil discharge cannot be completely solved.

Method used

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  • Oil-gas double-cooling motor
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  • Oil-gas double-cooling motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] see Figure 1 to Figure 4 , Figure 9 , Figure 10 , Figure 18 ~ Figure 23 , an oil-air dual-cooled motor, including a motor shaft 14, a stator 12, a rotor 2 and a hub steel ring 1, the stator 12 is fixed on the motor shaft 14, the rotor 2 is sleeved on the stator 12, the outer ring of the rotor 2 and the hub steel ring 1 is welded and fixed, and the two ends of the rotor 2 are respectively fixed to the left end cover 4 of the motor and the right cover 15 of the motor; the key technology is that the rotor 2 is provided with a connecting ring 2.1, and the connecting ring 2.1 is provided with a support ring 2.2, and the support ring 2.2 is connected to the motor The left end cover 4 is connected, and the cooling liquid circulation cover 9 is fixedly installed on the right side of the left end cover 4 of the motor through the support column 4.6. A number of perfusion blocks 9.1 are arranged on the outer circumference of the cooling liquid circulation cover 9. An oil in...

Embodiment 2

[0052] see Figure 5 ~ Figure 9 , Figure 18 ~ Figure 23 , the motor cooling oil heat dissipation circulation system and cooling oil separation system described in this embodiment are the same as those in Embodiment 1, and will not be repeated here. The difference lies in the pressure difference balance system inside and outside the motor cavity. An oil vapor recovery chamber 5 is installed in the concave cavity 4.3 outside the left end cover 4 of the motor to form a pressure difference balance system inside and outside the motor cavity. One end of the oil vapor recovery chamber 5 is set on the motor shaft 14 through the central shaft hole 5.5 and fixed by the positioning sleeve 6 , the oil vapor recovery chamber 5 is in a static state after being fixed by the positioning shaft sleeve 6, and the other end of the oil vapor recovery chamber 5 is set on the central shaft sleeve 4.4 of the left end cover 4 of the motor through an oil seal 8, and is opened at the circumferential po...

Embodiment 3

[0054] see Figure 11 , Figure 12 , Figure 15 ~ Figure 23 , the motor cooling oil cooling circulation system and cooling oil separation system described in this embodiment are the same as those in Embodiment 1, and will not be repeated here. The difference lies in the pressure difference balance system inside and outside the motor cavity. The pressure difference balance system inside and outside the motor cavity uses the extended section of the shaft sleeve of the left end cover 4 of the motor as the rotating oil vapor recovery chamber 4.9, so that the rotating oil vapor recovery chamber 4.9 and the left end cover 4 of the motor form a built-in integrated structure, and the rotating oil vapor recovery In the chamber 4.9, the flange 18 is fixedly installed by the positioning sleeve 6, and one or more ventilation holes 5.2 are arranged on the circumference of the flange 18, and waterproof and breathable valves 5.4 are respectively installed in the one or more ventilation hole...

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Abstract

The invention discloses an oil-gas double-cooling motor, belongs to the technical field of wheel power transmission, and particularly relates to wheel power transmission of electric motorcycles and electric bicycles. The motor comprises a motor shaft, a stator, a rotor and a hub steel ring, and is characterized in that the motor is further provided with a motor working chamber, an oil storage and circulation cooling chamber, a cooling oil heat dissipation circulation system, a cooling oil separation system and a motor cavity internal and external pressure difference balance system, and the motor cavity internal and external pressure difference balance system comprises an oil vapor recovery chamber, a vent hole, a waterproof ventilation valve and the like. The motor has the advantages that the device can isolate and move residual oil, gasoline and liquid in the motor working chamber into the oil vapor recovery chamber through a ventilation isolation oil discharge duct for full vaporization and secondary recovery, so that the steam pressure in the motor cavity is kept balanced, smooth exhaust is realized, the cooling liquid is prevented from gushing out of the motor and leaking, and oil-free discharge is realized. And the problem that oil leaks and leaks from a power line and a sealing port due to thermal expansion of oil, which cannot be solved by an oil cooling motor in the prior art, is thoroughly solved.

Description

technical field [0001] An oil-gas dual-cooling motor belongs to the technical field of wheel power transmission, in particular to the wheel power transmission of electric motorcycles and electric bicycles. Background technique [0002] The existing electric wheel hub motors only rely on air to dissipate heat. The heat dissipation efficiency of this heat dissipation method is extremely low, especially when driving at high speed or in hilly and mountainous areas, the slope is large and the load is heavy. It is easy to burn out the motor and force the magnetic steel sheet to demagnetize at high temperature. This greatly reduces the service life of the motor, and the range of use of the electric vehicle is limited. The liquid-cooled motor in the prior art has no cooling oil heat dissipation circulation system and oil-liquid separation system, so that the motor is prone to high temperature. If there is no oil-liquid separation system, the oil in the air gap of the stator and rot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K9/193H02K9/20
CPCH02K9/193H02K9/20
Inventor 李绵军唐宏康辉谢明江刘军
Owner 李绵军
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