CN113794331B - Oil-gas double-cooling motor - Google Patents
Oil-gas double-cooling motor Download PDFInfo
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- CN113794331B CN113794331B CN202111062064.0A CN202111062064A CN113794331B CN 113794331 B CN113794331 B CN 113794331B CN 202111062064 A CN202111062064 A CN 202111062064A CN 113794331 B CN113794331 B CN 113794331B
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- 238000001816 cooling Methods 0.000 title claims abstract description 113
- 238000011084 recovery Methods 0.000 claims abstract description 68
- 238000009423 ventilation Methods 0.000 claims abstract description 49
- 238000003860 storage Methods 0.000 claims abstract description 25
- 239000000110 cooling liquid Substances 0.000 claims abstract description 21
- 230000017525 heat dissipation Effects 0.000 claims abstract description 20
- 238000000926 separation method Methods 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- 238000002955 isolation Methods 0.000 claims description 26
- 230000010412 perfusion Effects 0.000 claims description 10
- 239000007788 liquid Substances 0.000 abstract description 26
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009834 vaporization Methods 0.000 abstract description 2
- 230000008016 vaporization Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000004804 winding Methods 0.000 description 5
- 230000003068 static effect Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/193—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/20—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
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- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
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 by further comprising a motor working chamber, an oil storage, a circulating cooling chamber, a cooling oil heat dissipation circulating system, a cooling oil separation system and a pressure difference balancing system inside and outside a motor cavity, wherein the pressure difference balancing system inside and outside the motor cavity comprises an oil vapor recovery chamber, an air vent, a waterproof ventilation valve and the like. The invention has the beneficial effects that: the device can separate and move the residual oil and gas in the motor working chamber into the oil and gas recovery chamber through the ventilation separation oil discharge duct to carry out full vaporization secondary recovery, so that the vapor pressure in the motor cavity is kept balanced, the ventilation is smooth, the leakage of cooling liquid from the outside of the motor is prevented, and the oil-free liquid discharge is realized. Thoroughly solves the problem that the oil thermal expansion of the oil cooling motor in the prior art can not be solved all the time, and oil is leaked from a power line and a sealing port.
Description
Technical Field
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.
Background
The existing electric vehicle hub motor only depends on an air heat dissipation mode, the heat dissipation efficiency of the heat dissipation mode is extremely low, particularly when the electric vehicle is driven at a high speed or in hilly and mountainous areas, the gradient is large, the load is heavy, the temperature is increased when the motor is in overload operation, the motor is easy to burn out, and the magnetic steel sheet is forced to demagnetize at a high temperature. The service life of the motor is greatly shortened, and the application range of the electric vehicle is limited. In the prior art, the liquid cooling motor has no cooling oil heat dissipation circulation system and oil liquid separation system, so that the motor is extremely easy to generate high temperature, such as an oilless liquid separation system, oil liquid in an air gap between a stator and a rotor of the motor cannot be discharged at all, rotary oil liquid resistance can be generated, the oil quantity is slightly more, or the resistance is larger as the rotating speed is higher, and the running mileage and the performance of the whole electric vehicle are definitely reduced. Therefore, the method is that less cooling oil can be added to reduce oil resistance loss, but the cooling effect of the less cooling oil is poor, especially when the motor current is large and winding heat productivity is rapidly increased in hills and mountain areas meeting continuous steep slopes, the temperature in the motor is rapidly increased, the temperature of the cooling oil is increased, meanwhile, the pressure in the inner cavity of the motor is increased, the pressure inside and outside the motor is unbalanced, the cooling oil in the motor immediately generates steam pressure, and the steam pressure is released, so that the cooling oil can leak to the outside of the motor more easily through a cable port, an oil seal and other sealing assemblies, which are all pain points and common diseases of the oil-cooled motor in the prior art, so that the cooling oil consumption is accelerated and the motor loses the protection effect of the cooling oil. In the existing liquid cooling motor, the difficult problem of exhausting the exhaust oil cannot be thoroughly solved.
Disclosure of Invention
The invention aims to solve the problems of providing the novel motor for the electric motor car and the electric bicycle, which can realize multi-oil-quantity circulation without oil resistance, thoroughly solve the problems of exhausting and discharging oil of the liquid cooling motor and has good cooling effect. The technical scheme is as follows:
an oil-gas double-cooling motor comprises a motor shaft, a stator, a rotor and a hub steel ring, wherein the stator is fixed on the motor shaft, the rotor is sleeved on the stator, the outer ring of the rotor is fixedly connected with the hub steel ring in a welding way, and the two ends of the rotor are respectively fixedly connected with a left end cover and a right end cover of the motor; the key technology is that a connecting ring is arranged on a rotor, a supporting ring is arranged on the connecting ring, the supporting ring is connected with a left end cover of a motor, a cooling liquid circulation cover is arranged in the left end cover of the motor, a perfusion block and an oil inlet hole are arranged on the cooling liquid circulation cover, an oil nozzle is arranged on the inner side of the cooling liquid circulation cover, and an oil outlet groove is formed in the circumferential position of the cooling liquid circulation cover; the space formed by the cooling liquid circulation cover, the motor right cover and the rotor forms a motor working chamber, the space formed by the cooling liquid circulation cover, the motor left end cover, the connecting ring and the supporting ring forms an oil storage and circulation cooling chamber, the motor working chamber, the oil storage and circulation cooling chamber form a cooling oil heat dissipation circulation system, and an air gap among the motor working chamber, the stator and the magnetic steel sheet is led into the oil storage and circulation cooling chamber through an oil outlet groove to form a cooling oil separation system; an oil vapor recovery chamber is arranged outside the left end cover of the motor to form a pressure difference balance system inside and outside a motor cavity, one end of the oil vapor recovery chamber is sleeved on a motor shaft and fixed through a positioning shaft sleeve, the other end of the oil vapor recovery chamber is sleeved on the left end cover of the motor, one or more vent holes are formed in the circumferential position of the oil vapor recovery chamber, and a gas flow pipe or a waterproof ventilation valve is respectively fixedly connected in one or more vent holes.
Compared with the prior art, the invention has the following beneficial effects:
1. The invention provides a pressure difference balancing system between the inside and the outside of a motor cavity, and the following structure of the balancing system has positive effects on the device: ① The oil vapor recovery chamber of the balance system is connected with more gas flow pipes or waterproof ventilation valves; ② All communication spaces are formed into an oil-gas labyrinth passage after all parts in the oil-gas recovery chamber are connected at the junction of a plurality of ventilation isolation oil discharge passages, oil seals and exhaust holes with different angles and directions; ③ A space is arranged between the exhaust hole and the connecting port of the air flow pipe or the waterproof air-permeable valve, and the space is just like a recovery chamber. The structure can separate and move the residual oil and gas in the motor working chamber into the oil and gas recovery chamber through the ventilation separation oil discharge duct to be fully vaporized and recovered, and particularly the main function of the oil and gas labyrinth duct is to discharge air pressure to recover the oil and gas, so that the temperature and the air flow in the motor can be fully exchanged, the steam pressure in the motor cavity can be kept balanced under the condition that the temperature difference between the inside and the outside of the motor cavity is large, the ventilation can be smooth, the recovered oil and gas can be converted well, the leakage caused by the emission of cooling liquid to the outside of the motor can be prevented, and the oil-free liquid discharge can be realized. The problems that the performance of an oil cooling motor in the prior art is poor and oil leaks from a power line and a sealing port due to thermal expansion of oil after being heated are thoroughly solved.
2. The pressure difference balancing system between the inside and the outside of the motor cavity provides a good low-temperature working condition for the motor of the electric vehicle. The actual test data of the road shows that under the same condition of continuous two kilometers of steep slopes, the comparison test between the technical scheme and the existing oil cooling electric vehicle shows that: when the oil cooling electric vehicle in the prior art runs for two times and a half (the accumulated distance is 5 km), the vehicle is burnt out and cannot run, and the temperature in the motor is 156 ℃; the temperature in the motor of the electric vehicle is 98 degrees under the same condition, and the design limit temperature of the motor is 120 degrees. The following table is comparative test data:
3. The other structure of the pressure difference balancing system inside and outside the motor cavity is that a waterproof ventilation valve is arranged in a ventilation hole of the oil vapor recovery chamber, so that the purposes of water resistance, dust resistance and ventilation can be achieved, and the structure is simple and the maintenance is convenient.
4. The pressure difference balance system between the inside and the outside of the motor cavity is arranged outside the motor shell, so that the motor has enough space to easily install the oil vapor recovery chamber, and can better exert the optimal performance because the motor is positioned outside the motor. Therefore, the strength of the motor shaft is ensured, the air flow pipe is prevented from being damaged in the carrying process, the air flow pipe is not required to be disassembled when the brake is replaced after the maintenance is performed, the maintenance and the installation are facilitated, the manufacturing process is simplified, the manufacturing cost is reduced, the safety performance is improved, and the like.
5. The invention has a cooling oil heat dissipation circulation system, the motor working chamber is communicated with the oil storage and circulation cooling chamber for circulation, and the oil quantity stored in the oil storage and circulation cooling chamber can be automatically adjusted and released according to the rotation speed of the motor. The cooling oil quantity is sufficient, the motor does not have oil resistance loss in the circulation process, meanwhile, the cooling oil liquid can more accurately aim at the motor winding and the stator for oil injection through the oil nozzle, and the heat of the heating source winding can be continuously absorbed and loaded into the circulation cooling chamber for circulation cooling so as to reduce the temperature of the motor, thereby reducing the failure rate of the motor, reducing the use cost, prolonging the service life and enabling the electric vehicle to exert the optimal efficiency and performance.
6. The motor is also provided with a cooling oil separation system, when the motor rotor rotates, cooling oil in the motor working chamber is rapidly and forcedly discharged to the oil storage and circulation cooling chamber under the action of centrifugal force, then oil in the motor stator and the rotor air gap is separated and discharged, and the cooling oil cannot stay in the air gap between the rotor and the stator, so that the purpose of circulation heat dissipation is achieved, the magnetic steel is protected from demagnetizing and the coil is not easy to burn, the problem of oil resistance loss of the motor air gap is solved, the motor cooling heat dissipation effect is excellent, the purpose of oil resistance free work of the motor is realized, the effect of no leakage of the existing oil is achieved, and the environmental protection purpose of zero pollution is achieved. The cooling oil heat dissipation circulation system and the cooling oil separation system form a double-cooling motor.
7. According to the invention, the motor rotor, the connecting ring and the supporting ring are of an integrated structure, so that the manufacturing process and the bolt fixing installation point are reduced, the supporting ring is not required to be fixed with the connecting ring through bolts, the connecting ring is also not required to be fixed with the motor rotor through bolts, the split type bolt connection is eliminated, the hub steel ring welding process is simplified, and the welding seam oil leakage risk is avoided.
8. In summary, the invention has three independent systems, namely a cooling oil heat dissipation circulation system, a cooling oil separation system and a pressure difference balancing system inside and outside the motor cavity. Through experimental tests, the three independent systems coordinate to make the motor have extremely high intelligent control function in the working process. When the electric vehicle is overloaded or runs on a steep slope at a low speed and a high current at a high temperature, the motor rotating speed is lower (below 300 revolutions per minute), at the moment, under the action of centrifugal force, the quantity of the cooling oil stored in the motor along with the oil storage and the rotating floating of the inner cavity of the circulating cooling chamber is smaller, and the quantity of the oil entering the cooling circulation of the oil inlet hole is more, so that the cooling effect is better, and therefore, the technical scheme can automatically adjust and automatically control the extremely-fast cooling spraying operation mode under the condition of large-flow oil circulation according to the motor rotating speed. When the electric vehicle runs at a flat road or at a normal high speed and a low temperature under a rated load, the cooling oil in the motor is more than the oil stored in the inner cavity of the oil storage and circulation cooling chamber in a rotating floating mode, so that the oil quantity entering the cooling circulation of the oil inlet hole is less (the oil is stored in the oil storage and circulation cooling chamber in a rotating floating mode because more oil quantity is stored in the oil storage and circulation cooling chamber in a surrounding mode), but the electric vehicle runs at a low temperature at the moment, and high-flow circulation cooling is not needed, so that the technical scheme can automatically adjust and automatically control a slow cooling splashing running mode under the condition of low-flow oil circulation according to the rotating speed of the motor, thereby ensuring that the motor works in an excellent environment condition and enabling the motor to continuously exert the highest performance.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the enlarged partial structure of FIG. 1;
FIG. 3 is a schematic diagram of the structure of the pressure difference balancing system inside and outside the motor cavity according to the invention;
FIG. 4 is a cross-sectional view of FIG. 3;
FIG. 5 is a schematic view of another embodiment of the present invention;
FIG. 6 is a schematic view of the partially enlarged structure of FIG. 5;
FIG. 7 is a schematic diagram of another embodiment of a differential pressure balancing system between the inside and outside of a motor cavity according to the present invention;
FIG. 8 is a cross-sectional view of FIG. 7;
FIG. 9 is a schematic perspective view of a positioning sleeve according to the present invention;
FIG. 10 is a schematic view of the three-dimensional assembly of FIG. 1;
FIG. 11 is a schematic view of still another embodiment of the present invention;
FIG. 12 is a schematic view of the partially enlarged structure of FIG. 11;
FIG. 13 is a schematic view of yet another embodiment of the present invention;
FIG. 14 is a schematic view of the partially enlarged structure of FIG. 13;
FIG. 15 is a schematic perspective view of a flange plate according to the present invention;
FIG. 16 is a cross-sectional view of FIG. 15;
FIG. 17 is a schematic view of a three-dimensional structure of a fan blade according to the present invention;
FIG. 18 is a schematic perspective view of a motor rotor according to the present invention;
FIG. 19 is a perspective view of a coolant circulation housing according to the present invention;
FIG. 20 is an enlarged schematic view of a perfusion block according to the present invention;
FIG. 21 is a schematic view showing another perspective view of the coolant circulation housing of the present invention;
FIG. 22 is a schematic perspective view of the left end cover of the motor of the present invention;
fig. 23 is a schematic view of another directional perspective structure of the left end cover of the motor of the present invention.
Detailed Description
Example 1:
Referring to fig. 1-4, 9, 10 and 18-23, an oil-gas double-cooling motor comprises a motor shaft 14, a stator 12, a rotor 2 and a hub steel ring 1, wherein 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 is fixedly connected with the hub steel ring 1 by welding, and the two ends of the rotor 2 are respectively fixedly connected with a motor left end cover 4 and a motor right cover 15; the key technology is that a connecting ring 2.1 is arranged on a rotor 2, a supporting ring 2.2 is arranged on the connecting ring 2.1, the supporting ring 2.2 is connected with a left end cover 4 of a motor, a cooling liquid circulation cover 9 is fixedly arranged on the right side in the left end cover 4 of the motor through a supporting column 4.6, a plurality of perfusion blocks 9.1 are arranged at the circumferential position outside the cooling liquid circulation cover 9, oil inlet holes 9.4 are formed in the semi-surrounding position in the arc of the perfusion blocks 9.1, a plurality of oil nozzles 9.2 are arranged at the circumferential position, corresponding to the oil inlet holes 9.4, inside the cooling liquid circulation cover 9, and a plurality of oil outlet grooves 9.3 are formed in the circumferential position of the cooling liquid circulation cover 9, close to the connecting ring 2.1; the space formed by the cooling liquid circulation cover 9, the motor right cover 15 and the rotor 2 forms a motor working chamber 13, the space formed by the cooling liquid circulation cover 9, the motor left end cover 4, the connecting ring 2.1 and the supporting ring 2.2 forms an oil storage and circulation cooling chamber 3, the motor working chamber 13 and the oil storage and circulation cooling chamber 3 form a cooling oil heat dissipation circulation system, the oil nozzle 9.2 is positioned in the motor working chamber 13, so that the motor working chamber 13 and the oil storage and circulation cooling chamber 3 are communicated with each other through the oil outlet groove 9.3, the oil inlet hole 9.4 and the oil nozzle 9.2, and an air gap between the motor working chamber 13, the stator 12 and the magnetic steel sheet 11 in the motor working chamber is led into the oil storage and circulation cooling chamber 3 through the oil outlet groove 9.3, and the channels form a cooling oil separation system; as shown in fig. 1 to 4, an oil vapor recovery chamber 5 is installed in a concave cavity 4.3 outside a left end cover 4 of a motor to form a pressure difference balance system inside and outside the motor cavity, one end of the oil vapor recovery chamber 5 is sleeved on a motor shaft 14 through a central shaft hole 5.5 and fixed through a positioning shaft sleeve 6, the oil vapor recovery chamber 5 is in a static state after being fixed by the positioning shaft sleeve 6, the other end of the oil vapor recovery chamber 5 is sleeved on a central shaft sleeve 4.4 of the left end cover 4 of the motor through an oil seal 8, one or more vent holes 5.2 are formed in the circumferential position of the oil vapor recovery chamber 5, an air flow pipe 16 is fixedly connected in the one or more vent holes 5.2 respectively, and a waterproof ventilation valve 5.4 is installed at the other end of the air flow pipe 16.
As shown in fig. 9, a positioning pin 6.1 is provided at the flange circumference of the positioning sleeve 6, and the positioning pin 6.1 is inserted into the positioning hole 5.3 of the oil vapor recovery chamber 5 to prevent the oil vapor recovery chamber 5 from rotating around the motor shaft 14, thereby being fixed in a stationary state.
The oil-gas recovery chamber 5 has the functions of moving the oil-gas liquid in the working chamber 13 first, isolating the oil-gas liquid and then recovering the oil-gas liquid for the second time in the working process.
As shown in fig. 2, a first ventilation isolation oil drain duct 4.7 is formed in the inner wall of a bearing hole of the motor left end cover 4, a second ventilation isolation oil drain duct 14.1 is formed on the motor shaft 14, a third ventilation isolation oil drain duct 4.8 is arranged between the motor shaft 14 and the central shaft sleeve 4.4 of the motor left end cover 4, and a fourth ventilation isolation oil drain duct 4.8.1 is formed by gaps between balls of a bearing in the bearing hole of the motor left end cover 4 and a retainer. The four ventilation isolation oil discharge channels are mutually communicated, can isolate and move the residual oil and gas in the motor working chamber into the oil and gas recovery chamber 5 for vaporization secondary recovery, and are communicated with a cooling oil heat dissipation circulation system.
An oil-gas labyrinth passage 5.1 is arranged in the oil-gas recovery chamber 5, and the main functions of the oil-gas labyrinth passage are heat dissipation, exhaust and secondary oil recovery.
The perfusion block 9.1 is of a semicircular arc structure, one end of the semicircular arc is provided with a flow pushing tail 9.1.1, the other end of the semicircular arc is provided with a flow guiding block 9.1.2, a plurality of auxiliary flow pushing blocks 4.2 are further arranged at the circumferential position of the inner side of the left end cover 4 of the motor, the auxiliary flow pushing blocks 4.2 and the perfusion block 9.1 are positioned in the oil storage and circulation cooling chamber 3, and the auxiliary flow pushing blocks 4.2 and the perfusion block 9.1 jointly act to push cooling oil to increase the oil injection quantity of the oil injection nozzle 9.2.
An oil seal 8 is also arranged between the positioning shaft sleeve 6 and the oil vapor recovery chamber 5 to prevent oil from leaking from the shaft hole of the positioning shaft sleeve 6; the left end and the right end of the central bearing hole 15.3 of the right motor cover 15 are also provided with oil seals 8, so that the tightness of the motor is enhanced, and cooling oil is prevented from leaking into the brake drum 15.2.
A plurality of first air guide radiating ribs 4.1 are arranged at the circumferential position of the outer side of the left end cover 4 of the motor; as shown in fig. 1, a plurality of second air guiding and cooling ribs 15.1 are further arranged at the circumferential position of the outer side of the right cover 15 of the motor so as to accelerate the cooling of the brake drum 15.2.
The left end cover 4 of the motor is also provided with a visual observation window 4.5 for cooling oil.
The working principle of the embodiment is as follows:
When the vehicle is stationary, the motor does not rotate, at the moment, the cooling oil in the motor is in a stationary state, the cooling oil surface submerges the oil inlet hole 9.4, the motor magnetic steel sheet 11, the stator 12 and the motor coil winding 10 at the lower end are soaked in the cooling oil, and the capacity of the cooling oil is added according to the capacity of the motor working chamber 13 and the oil storage and circulation cooling chamber 3 in a certain proportion. The motor shaft 14 is fixed on the frame and the rear bottom fork, as shown in fig. 1 and 2, the oil vapor recovery chamber 5 is externally hung and sleeved on the motor left end cover 4, one end of the oil vapor recovery chamber 5 is fixed by the positioning shaft sleeve 6, the other end of the oil vapor recovery chamber 5 is fixed by the outer diameter of the oil seal 8, and the oil vapor recovery chamber 5 does not rotate along with the motor left end cover 4 when working and is in a static state. When the vehicle is ridden, the motor rotor 2 starts to rotate, cooling oil in the motor is pushed by centrifugal force generated when the motor rotor 2 rotates, oil is rapidly discharged and filled from the motor working chamber 13 to the oil storage and circulating cooling chamber 3 through the oil outlet groove 9.3, meanwhile, the cooling oil in the motor working chamber 13 is instantaneously reduced, and because the flow of the discharged oil is larger than the oil quantity of the oil, the cooling oil in the motor air gap is forced to be thoroughly discharged by the oil outlet groove 9.3 at the circumferential position of the cooling liquid circulating cover 9, and then the recovery process of the first oil and the first gas is completed. At the moment, no oil liquid in the air gap of the motor prevents the rotor from rotating, so that the motor can not generate oil resistance. When the motor reaches a certain rotating speed, the cooling oil in the oil storage and circulation cooling chamber 3 is filled to a certain capacity, the cooling oil is pressed into the oil inlet hole 9.4 under the pushing of the auxiliary plug flow block 4.2 and the perfusion block 9.1, then is sprayed onto the motor coil winding 10 and heating parts in the motor working chamber 13 through the oil spray nozzle 9.2 to quickly cool, and the cooling oil after heat absorption is discharged and filled into the oil storage and circulation cooling chamber 3 through the oil outlet groove 9.3 under the action of centrifugal force, so that the cooling oil continuously enters the next circulation. When the vehicle runs on a continuous slope, the current of the motor is increased, the temperature in the motor is increased, the pressure in the inner cavity of the motor is increased, at the moment, the cooling oil in the motor is evaporated and expanded, and the oil vapor enters the oil vapor recovery chamber 5 through the first ventilation and isolation oil discharge duct 4.7, the second ventilation and isolation oil discharge duct 14.1, the third ventilation and isolation oil discharge duct 4.8 and the fourth ventilation and isolation oil discharge duct 4.8.1 (which are formed by the clearance between the bearing balls and the retainer) in a moving and isolating way, and then is recovered through the oil vapor labyrinth duct 5.1 for secondary oil vapor to oil liquid. Specifically, after the high-temperature oil vapor enters the oil vapor recovery chamber 5, the temperature of the oil vapor recovery chamber 5 is far lower than the temperature inside the motor because the oil vapor recovery chamber 5 is positioned outside the motor casing, so that the high-temperature oil vapor stays in the oil vapor labyrinth passage 5.1 to be converted into oil liquid after being cooled, and then the sucked oil liquid is shunted to the first ventilation isolation oil discharge passage 4.7, the second ventilation isolation oil discharge passage 14.1 and the fourth ventilation isolation oil discharge passage 4.8.1 through the third ventilation isolation oil discharge passage 4.8, and then flows back into the motor working chamber 13. Because the first ventilation isolating exhaust duct 4.7 and the fourth ventilation isolating exhaust duct 4.8.1 are both positioned in the bearing hole, the second ventilation isolating exhaust duct 14.1 is positioned on the motor shaft 14, and the third ventilation isolating exhaust duct 4.8 is positioned between the motor shaft 14 and the central shaft sleeve 4.4 of the motor left end cover 4, they are all rotary dynamic suction ventilation isolating exhaust ducts. The recovery efficiency of the oil drain duct is several times higher than that of the static ventilation isolation oil drain duct, and the recovered oil liquid is immediately returned into the motor working chamber 13 under the action of centrifugal force for the next circulation process. In the working cycle process, the high-temperature oil vapor and oil liquid level is not higher than the inlet of the rotary third air-separation exhaust duct 4.8 with suction force, and practical tests show that the oil liquid level cannot span the inlet below the third air-separation exhaust duct 4.8, so that oil liquid is not discharged from the vent hole 5.2 after being recovered by the oil vapor recovery chamber 5. The vent hole 5.2 is connected with the air flow pipe 16, the other end of the air flow pipe 16 is provided with a waterproof air-permeable valve 5.4, the dustproof air-permeable valve has a dustproof function, and air is finally discharged through the waterproof air-permeable valve 5.4.
In summary, the cooling oil in the working process of the oil-gas double-cooling motor cannot stay in the air gap between the rotor and the stator, so that the purpose of circulating heat dissipation is achieved, the magnetic steel is protected from demagnetization and the coil is not easy to burn, the defect of no oil resistance loss of the air gap of the motor is overcome, and meanwhile, the pressure difference between the inside and the outside of the motor at the high-temperature running time can be balanced through the oil-gas recovery chamber 5, so that oil leakage is prevented.
Example 2:
Referring to fig. 5 to 9 and fig. 18 to 23, the cooling oil heat dissipation and separation system of the motor in this embodiment is identical to that of embodiment 1, and is not described here again, except for the pressure difference balancing system between the inside and outside of the motor cavity. An oil vapor recovery chamber 5 is arranged in a concave cavity 4.3 outside the motor left end cover 4 to form a motor cavity internal and external pressure difference balance system, one end of the oil vapor recovery chamber 5 is sleeved on a motor shaft 14 through a central shaft hole 5.5 and is fixed through a positioning shaft sleeve 6, the oil vapor recovery chamber 5 is in a static state after being fixed through the positioning shaft sleeve 6, the other end of the oil vapor recovery chamber 5 is sleeved on the central shaft sleeve 4.4 of the motor left end cover 4 through an oil seal 8, one or more vent holes 5.2 are formed in the circumferential position of the oil vapor recovery chamber 5, and waterproof ventilation valves 5.4 are respectively arranged in the one or more vent holes 5.2, so that the purposes of ventilation, internal and external pressure difference balance of the motor, water resistance and oil liquid leakage resistance are achieved. The principle of operation is the same as in example 1.
Example 3:
Referring to fig. 11, 12 and 15-23, the cooling oil heat dissipation and separation system of the motor in this embodiment is identical to that of embodiment 1, and is not described herein again, but the difference is the pressure difference balancing system between the inside and outside of the motor cavity. The pressure difference balance system inside and outside the motor cavity takes a shaft sleeve extension section of a motor left end cover 4 as a rotary oil vapor recovery chamber 4.9, so that the rotary oil vapor recovery chamber 4.9 and the motor left end cover 4 form a built-in integrated structure, a flange plate 18 is fixedly arranged in the rotary oil vapor recovery chamber 4.9 through a positioning shaft sleeve 6, one or more vent holes 5.2 are formed in the circumferential position of the flange plate 18, and waterproof ventilation valves 5.4 are respectively arranged in the one or more vent holes 5.2. The center of the flange 18 is provided with a shaft hole 18.1, the circumferential position of the flange is provided with a positioning hole 5.3, and a positioning pin 6.1 on the positioning shaft sleeve 6 is embedded into the positioning hole 5.3 to prevent the flange 18 from rotating around the motor shaft 14; an oil seal 8 is arranged between the rotary oil vapor recovery chamber 4.9 and the flange 18, and an oil seal 8 is also arranged between the positioning shaft sleeve 6 and the flange 18 to prevent oil from leaking from the shaft hole of the positioning shaft sleeve 6; a plurality of fifth ventilation isolation oil drain channels 4.10 are arranged at the circumferential position of the left end cover 4 of the motor, which is close to the bearing hole.
The left side of the flange 18 is provided with a fan blade 17 in the concave cavity 4.3 at the left side outside the left end cover 4 of the motor, and the circumference of the fan blade 17 is provided with a plurality of blades 17.1.
The working principle of the embodiment is as follows:
The working principles of the cooling oil heat dissipation circulation system and the cooling oil separation system in this embodiment are the same as those of embodiment 1, and are not described here again, except for the pressure difference balancing system inside and outside the motor cavity. When the vehicle runs on a continuous slope, the current of the motor is increased, the temperature in the motor is increased, the pressure in the inner cavity of the motor is increased, and the cooling oil is evaporated and expanded in the moment to recover the secondary oil-gas-to-oil liquid through the rotary suction type fourth ventilation and isolation oil discharge duct 4.8.1 and the fifth ventilation and isolation oil discharge duct 4.10 to the oil-gas labyrinth duct 5.1. Specifically, after the high-temperature oil vapor enters the oil vapor labyrinth passage 5.1 through the fourth and fifth ventilation and isolation oil discharge passages, the temperature of the rotary oil vapor recovery chamber 4.9 is far lower than the temperature in the motor because the rotary oil vapor recovery chamber is positioned at the outer side of the left end cover 4 of the motor, so that the high-temperature oil vapor is cold, stays in the oil vapor labyrinth passage 5.1 and is converted into oil liquid, and is sucked into the motor working chamber 13 through the fifth ventilation and isolation oil discharge passage 4.10 to finish the recovery of the oil vapor of the second most part. The residual part of the oil and gas liquid is recycled for the next time with the oil and gas entering after the residual part of the oil and gas liquid; practical tests show that the cooling oil is sucked and recovered from the position just below the inlet corresponding to the fifth ventilation isolation oil drain duct 4.10. So that no oil is discharged from the vent hole 5.2 after being recovered through the oil-gas labyrinth passage 5.1. The fan blades 17 can continuously cool the left end cover 4 of the motor, the rotary oil recovery chamber 4.9, the oil storage and circulating cooling chamber 3 in an axial direction along with the rotation of the motor, cool the flange 18, accelerate the conversion of high-temperature oil and gas into oil in the oil storage and circulating cooling chamber 3 and the motor working chamber 13, and rapidly complete the recovery of oil and gas. The rotary oil recovery chamber 4.9 and the motor left end cover 4 are of an integrated structure, and the rotary oil recovery chamber 4.9 rotates along with the motor left end cover 4, so that the rotary oil vapor recovery chamber 4.9 is in a rotating state when working; the flange 18 is fixed on the motor shaft through the positioning shaft sleeve 6, and an oil seal 8 is arranged between the flange 18 and the rotary oil recovery chamber 4.9, so that the flange 18 is fixed during operation.
Example 4:
Referring to fig. 13 to 23, the cooling oil heat dissipation and separation system of the motor in this embodiment is identical to that of embodiment 3, and is not described herein again, but the difference is also the pressure difference balancing system between the inside and outside of the motor cavity. The pressure difference balancing system inside and outside the motor cavity takes a shaft sleeve extension section of a motor left end cover 4 as a rotary oil vapor recovery chamber 4.9, so that the rotary oil vapor recovery chamber 4.9 and the motor left end cover 4 form an integrated structure, a flange plate 18 is fixedly installed in the rotary oil vapor recovery chamber 4.9 through a positioning shaft sleeve 6, a plurality of vent holes 5.2 are formed in the circumferential position of the flange plate 18, an air flow pipe 16 is fixedly connected in one or a plurality of vent holes 5.2 respectively, and a waterproof ventilation valve 5.4 is installed at the other end of the air flow pipe 16. The principle of operation is the same as in example 3.
In the figure 7 is the motor wire.
While the embodiments of the present invention have been described above with reference to the accompanying drawings, and not as a result, the scope of the invention is defined by the claims, but it will be understood by those skilled in the art that various changes and modifications may be made, and the names of the parts may be modified, within the scope and intent of the present invention, and all equivalent processes and structural changes made by the content of the present invention, or direct or indirect application in other related technical fields, are equally included in the scope of the present invention.
Claims (9)
1. The utility model provides an oil gas double-cooling motor, includes motor shaft (14), stator (12), rotor (2) and wheel hub steel ring (1), and stator (12) are fixed on motor shaft (14), and rotor (2) suit is on stator (12), and the outer lane of rotor (2) is welded fixedly with wheel hub steel ring (1), and motor left end cover (4) and motor right cover (15) are linked fixedly respectively at rotor (2) both ends; the motor is characterized in that a connecting ring (2.1) is arranged on a rotor (2), a supporting ring (2.2) is arranged on the connecting ring (2.1), the supporting ring (2.2) is connected with a left end cover (4) of a motor, a cooling liquid circulation cover (9) is arranged in the left end cover (4) of the motor, a perfusion block (9.1) and an oil inlet hole (9.4) are arranged on the cooling liquid circulation cover (9), an oil nozzle (9.2) is arranged on the inner side of the cooling liquid circulation cover (9), and an oil outlet groove (9.3) is formed in the circumferential position of the cooling liquid circulation cover (9); the space formed by the cooling liquid circulation cover (9), the motor right cover (15) and the rotor (2) forms a motor working chamber (13), the space formed by the cooling liquid circulation cover (9), the motor left end cover (4), the connecting ring (2.1) and the supporting ring (2.2) forms an oil storage and circulation cooling chamber (3), the motor working chamber (13) and the oil storage and circulation cooling chamber (3) form a cooling oil heat dissipation circulation system, and an air gap between the motor working chamber (13), the stator (12) and the magnetic steel sheet (11) is led to the oil storage and circulation cooling chamber (3) through an oil outlet groove (9.3) to form a cooling oil separation system; an oil vapor recovery chamber (5) is arranged outside a motor left end cover (4) to form a motor cavity internal and external pressure difference balance system, one end of the oil vapor recovery chamber (5) is sleeved on a motor shaft (14), the other end of the oil vapor recovery chamber is sleeved on a central shaft sleeve 4.4 of the motor left end cover (4), one or more vent holes (5.2) are formed in the circumferential position of the oil vapor recovery chamber (5), and an air flow pipe (16) or a waterproof ventilation valve (5.4) are respectively fixedly connected in the one or more vent holes (5.2).
2. The oil-gas double-cooling motor according to claim 1, wherein an oil-gas labyrinth passage (5.1) is arranged in the oil-gas recovery chamber (5).
3. An oil and gas double-cooling motor according to claim 1, characterized in that a waterproof ventilation valve (5.4) is arranged at the other end of the airflow pipe (16).
4. The oil-gas double-cooling motor according to claim 1, characterized in that a positioning shaft sleeve (6) is arranged on a motor shaft (14), a positioning pin (6.1) is arranged on the positioning shaft sleeve (6), and the positioning pin (6.1) is embedded into the oil-gas recovery chamber (5).
5. The oil-gas double-cooling motor according to claim 1, characterized in that a first ventilation isolation exhaust duct (4.7) is formed in the inner wall of a bearing hole of a motor left end cover (4), a second ventilation isolation exhaust duct (14.1) is formed on a motor shaft (14), a third ventilation isolation exhaust duct (4.8) is arranged between the motor shaft (14) and a central shaft sleeve (4.4) of the motor left end cover (4), a fourth ventilation isolation exhaust duct (4.8.1) is formed between a ball of a bearing in the bearing hole of the motor left end cover (4) and a clearance of a retainer, and a plurality of fifth ventilation isolation exhaust ducts (4.10) are formed at the circumferential position of the motor left end cover (4) close to the bearing hole.
6. The oil-gas double-cooling motor according to claim 1, wherein the perfusion block (9.1) is of a semicircular arc structure, one end of the semicircular arc is provided with a plug tail (9.1.1), the other end of the semicircular arc is provided with a flow guide block (9.1.2), and the left end cover (4) of the motor is further provided with an auxiliary plug block (4.2).
7. The oil-gas double-cooling motor according to claim 1, characterized in that an oil seal (8) is arranged between the positioning shaft sleeve (6) and the oil-gas recovery chamber (5); oil seals (8) are arranged at the left end and the right end of a central bearing hole (15.3) of the right motor cover (15).
8. The oil-gas double-cooling motor according to claim 1, wherein the motor cavity internal-external pressure difference balance system takes a shaft sleeve extension section of a motor left end cover (4) as a rotary oil-gas recovery chamber (4.9), a flange plate (18) is fixedly arranged in the rotary oil-gas recovery chamber (4.9) through a positioning shaft sleeve (6), one or more vent holes (5.2) are formed in the circumferential position of the flange plate (18), and a waterproof ventilation valve (5.4) or an airflow pipe (16) are respectively arranged in the one or more vent holes (5.2).
9. The oil-gas double-cooling motor according to claim 8, wherein the center of the flange plate (18) is provided with a shaft hole (18.1), the circumferential position of the flange plate (18) is provided with a positioning hole (5.3), and the positioning pin (6.1) on the positioning shaft sleeve (6) is embedded into the positioning hole (5.3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111062064.0A CN113794331B (en) | 2021-09-10 | 2021-09-10 | Oil-gas double-cooling motor |
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| CN202111062064.0A CN113794331B (en) | 2021-09-10 | 2021-09-10 | Oil-gas double-cooling motor |
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| CN115664117B (en) * | 2022-12-26 | 2023-03-03 | 河北乾顺节能科技有限公司 | Liquid cooling device of double-stator permanent magnet direct drive motor |
| CN116073570B (en) * | 2023-03-22 | 2023-10-31 | 北京牧风科技有限公司 | Motor cooling structure and cooling method |
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|---|---|---|---|---|
| JP2016149900A (en) * | 2015-02-13 | 2016-08-18 | マツダ株式会社 | Cooling structure for rotary electric machine |
| CN107458201A (en) * | 2017-06-22 | 2017-12-12 | 江苏银基烯碳能源科技有限公司 | A kind of driving motor of electric vehicle cooling system |
| CN211508790U (en) * | 2020-03-16 | 2020-09-15 | 李绵军 | Hydraulic pump type hub motor |
| CN111756133A (en) * | 2020-07-06 | 2020-10-09 | 珠海格力电器股份有限公司 | Motor cooling structure, motor, car |
| CN216086405U (en) * | 2021-09-10 | 2022-03-18 | 李绵军 | Oil-gas double-cooling motor |
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2021
- 2021-09-10 CN CN202111062064.0A patent/CN113794331B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016149900A (en) * | 2015-02-13 | 2016-08-18 | マツダ株式会社 | Cooling structure for rotary electric machine |
| CN107458201A (en) * | 2017-06-22 | 2017-12-12 | 江苏银基烯碳能源科技有限公司 | A kind of driving motor of electric vehicle cooling system |
| CN211508790U (en) * | 2020-03-16 | 2020-09-15 | 李绵军 | Hydraulic pump type hub motor |
| CN111756133A (en) * | 2020-07-06 | 2020-10-09 | 珠海格力电器股份有限公司 | Motor cooling structure, motor, car |
| CN216086405U (en) * | 2021-09-10 | 2022-03-18 | 李绵军 | Oil-gas double-cooling motor |
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