CN209930091U - Oil-cooled motor structure - Google Patents
Oil-cooled motor structure Download PDFInfo
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- CN209930091U CN209930091U CN201921026397.6U CN201921026397U CN209930091U CN 209930091 U CN209930091 U CN 209930091U CN 201921026397 U CN201921026397 U CN 201921026397U CN 209930091 U CN209930091 U CN 209930091U
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Abstract
The utility model relates to an oil-cooled motor structure, wherein, a front end cover and a rear end cover are respectively arranged at two ends of a rotating shaft, a front end cover oil storage chamber is arranged between the front end cover and the rotating shaft, and the front end cover oil storage chamber forms a closed oil storage chamber; the rotating shaft is of a hollow structure, a plugging piece is arranged at the front end of the rotating shaft, an oil inlet and an oil outlet are formed in the rotating shaft, a front rotor end plate and a rear rotor end plate are arranged on the rotating shaft, and a front rotor end plate oil storage chamber and a rear rotor end plate oil storage chamber are arranged between the front rotor end plate and the rotating shaft as well as between the rear rotor end plate and the stator core. Through the rotation of the rotor and the increase of the cooling oil in the rotating shaft, the cooling oil flows to the tail end of the shaft along the inside of the rotor, and the rotor is effectively cooled; along with cooling oil flows in the rotor, finally flow into and get into preceding, back rotor end plate oil storage chamber, when having certain cooling oil in the oil storage chamber, under the effect of centrifugal force, cooling oil can be even spray on stator winding, cools off motor stator, and is high-efficient convenient.
Description
Technical Field
The utility model belongs to the technical field of the motor, specifically speaking is an oil cooling motor structure, especially relates to an oil cooling motor structure for new energy automobile.
Background
At present, the market competition of new energy motors is fierce, and the industry gradually develops towards high efficiency and high power density. The losses of the motor are mainly wasted in the form of heat generation. The internal temperature rise of the motor can influence the copper consumption of the stator, and the performance of the Ru iron boron material can be influenced by the overhigh internal temperature of the rotor. In severe cases, irreversible demagnetization of the Ru FeB material can be caused, so that heat dissipation of the motor is necessary. The motor water cooling system has higher heat dissipation efficiency and lower technical difficulty, and can meet most requirements, but has two defects: one of them is the drawback of the cooling of the cabinet. The cooling method needs the heat source in the motor to be transferred to the shell water channel through the stator core and the motor shell and then taken away by the water channel. Because of the thermal resistance of the material, a temperature gradient exists from the windings to the housing water channel. The windings cannot be directly cooled, so that the cooling efficiency is not ideal, and therefore, a direct cooling heat source is required to improve the cooling efficiency. Another disadvantage is that the power density of the new energy automobile to the motor is more and more strict, and the power density can be obviously increased by increasing the cooling efficiency, so that the oil cooling with the cooling efficiency higher than the water cooling is selected for direct cooling. And because the oil does not have magnetic and electric conduction characteristics, the oil does not influence the magnetic circuit of the motor, and therefore the oil is selected as a medium for directly cooling the inside.
Some oil-cooled motor oil feed modes pass through hollow shaft and built-in water pipe constitution, can have the friction between convenient condenser tube and the rotation axis, lead to the pipeline easy damage. The water pipe is not completely attached to the rotating shaft, so that the rotor can be further cooled after cooling oil enters the water pipe, and the cooling effect is not ideal; other oil-cooled motors use a composite hollow shaft sleeve to cool the rotor, although this approach may provide cooling. But the structure of the shaft is complex, the processing is not easy, and the production cost is greatly improved. And the oil inlet of the shell of the oil-cooled motor directly cools the stator winding, the cooling oil drops on the rotor under the action of gravity, and the rotor rotates at high speed to splash the cooling oil inside the motor to cool the rotor and the bearing. However, the cooling oil dropping from the stator is not uniform, resulting in non-uniform cooling of the rotor, and the cooling oil cannot directly act on the rotor, which is not preferable.
Disclosure of Invention
An object of the utility model is to provide a modified oil-cooled motor structure, through setting up the pivot of oil storage chamber and hollow structure for the coolant oil transmits and sprays stator winding along the pivot, can cool off stator and rotor simultaneously, and cooling efficiency is high.
In order to realize the purpose, the technical scheme of the utility model is that: the utility model provides an oil-cooled motor structure, includes the casing, its characterized in that: a rotating shaft and a stator core are arranged in the shell, a front end cover and a rear end cover are respectively arranged at two ends of the rotating shaft, a front end cover oil storage chamber is arranged between the front end cover and the rotating shaft, and a front oil seal and a rear oil seal are respectively arranged at two ends of the front end cover oil storage chamber, so that the front end cover oil storage chamber forms a closed oil storage chamber; the rotating shaft is of a hollow structure, a plugging piece is arranged at the front end of the rotating shaft, an oil inlet and an oil outlet are formed in the rotating shaft, a front rotor end plate and a rear rotor end plate are arranged on the rotating shaft, and a front rotor end plate oil storage chamber and a rear rotor end plate oil storage chamber are arranged between the front rotor end plate and the rotating shaft as well as between the rear rotor end plate and the stator core.
Preferably, a front end cover oil storage chamber, a front rotor end plate oil storage chamber and a rear rotor end plate oil storage chamber are sequentially arranged around the rotating shaft; the rotating shaft is sequentially provided with a rotating shaft oil inlet, a first rotating shaft oil outlet and a second rotating shaft oil outlet, the position of the rotating shaft oil inlet corresponds to the position of the front end cover oil storage chamber, the rotating shaft oil inlet is communicated with the front end cover oil storage chamber, and the positions of the first rotating shaft oil outlet and the second rotating shaft oil outlet correspond to the positions of the front rotor end plate oil storage chamber and the rear rotor end plate oil storage chamber and are communicated with the positions of.
Furthermore, a plurality of partition plates are respectively arranged on the front rotor end plate and the rear rotor end plate to respectively partition the oil storage chambers of the front rotor end plate and the rear rotor end plate into a plurality of branch oil storage chambers, the front rotor end plate is provided with front end cover oil outlet holes corresponding to the number of the partition plates, and each oil outlet hole is respectively communicated with one branch oil storage chamber; the rear rotor end plate is provided with a plurality of rear end cover oil outlet holes corresponding to the number of the partition plates, and each oil outlet hole is respectively communicated with one branch oil storage chamber.
Compared with the prior art, the technical scheme of the utility model except whole technical scheme's improvement, still include the improvement in the aspect of many details, particularly, have following beneficial effect:
1. the improved scheme of the utility model is provided with a rotating shaft with a hollow structure, the rotating shaft is provided with an oil inlet and an oil outlet, and the cooling oil flows to the end of the shaft along the inside of the rotor through the rotation of the rotor and the increase of the cooling oil in the rotating shaft, so as to effectively cool the rotor;
2. in the technical scheme of the utility model, as the cooling oil flows in the rotor and finally flows into the front and rear rotor end plate oil storage chambers, when a certain amount of cooling oil is in the oil storage chamber, the cooling oil can be uniformly sprayed on the stator winding under the action of centrifugal force to cool the motor stator, which is efficient and convenient;
3. the utility model has simple structure and reasonable layout, and can cool the stator and the rotor simultaneously, thereby improving the cooling efficiency;
4. the utility model discloses convenient assembling, manufacturing cost is lower, easily promotes and utilizes.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the rotor end cover of the present invention.
Fig. 3 is a sectional view taken along the line a-a in fig. 2.
Reference numerals:
1. the oil pump comprises a motor oil inlet 2, a front end cover oil storage chamber 3, a rotating shaft oil inlet 4, a rotating shaft oil storage chamber 5, a first rotating shaft oil outlet 6, a front rotor end plate oil storage chamber 7, a front rotor end plate oil outlet 8, a second rotating shaft oil outlet 9, a rear rotor end plate oil storage chamber 10, a rear rotor end plate oil outlet 11, a rear end cover oil outlet 12, a front end cover oil outlet 21, a front oil seal 31, a rear oil seal 41 and a plugging piece.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides an oil-cooling motor structure, specifically refer to FIG. 1, including the casing, its difference with prior art lies in: a rotating shaft and a stator core are arranged in the shell, a front end cover and a rear end cover are respectively arranged at two ends of the rotating shaft, a front end cover oil storage chamber is arranged between the front end cover and the rotating shaft, and a front oil seal and a rear oil seal are respectively arranged at two ends of the front end cover oil storage chamber, so that the front end cover oil storage chamber forms a closed oil storage chamber; the rotating shaft is of a hollow structure, a plugging piece is arranged at the front end of the rotating shaft, an oil inlet and an oil outlet are formed in the rotating shaft, a front rotor end plate and a rear rotor end plate are arranged on the rotating shaft, and a front rotor end plate oil storage chamber and a rear rotor end plate oil storage chamber are arranged between the front rotor end plate and the rotating shaft as well as between the rear rotor end plate and the stator core.
Specifically, the front end cover comprises an inner oil seal and an outer oil seal to form a closed oil storage chamber, an oil inlet is formed in the front end cover, and cooling oil flows into the inside of the oil storage chamber through the oil inlet. The cooling oil flows into the hollow shaft core from the oil storage chamber by a certain pressure, and the rotor is cooled. The front and rear end plates of the rotor, the rotating shaft and the rotor core form 16 small oil storage chambers, and cooling oil in the oil storage chambers is sprayed to the stator winding along 16 small holes in the side faces of the front and rear end plates of the rotor under the action of centrifugal force. Thereby cool off the stator winding, the cooling oil sprays on the stator, relies on self action of gravity deposit in the motor bottom, discharges through front and back end cover oil outlet. The motor is simple in structure, can cool the stator and the rotor simultaneously, and improves cooling efficiency.
In one embodiment, the rotating shaft is of a hollow structure, a blocking piece is arranged at the front end of the rotating shaft, an oil inlet and an oil outlet are formed in the rotating shaft, a front end cover oil storage chamber is arranged between a front end cover and the rotating shaft, a front oil seal and a rear oil seal are respectively arranged at two ends of the front end cover oil storage chamber, so that the front end cover oil storage chamber is changed into a closed structure, a front end cover oil inlet is formed in the front end cover, cooling oil flows into the front end cover oil storage chamber through the oil inlet, the front end cover oil storage chamber is communicated with the rotating shaft oil inlet, and the cooling oil can flow into the hollow rotating shaft through the rotating.
Specifically, a front end cover oil storage chamber, a front rotor end plate oil storage chamber and a rear rotor end plate oil storage chamber are sequentially arranged around the rotating shaft; the rotating shaft is sequentially provided with a rotating shaft oil inlet, a first rotating shaft oil outlet and a second rotating shaft oil outlet, the position of the rotating shaft oil inlet corresponds to the position of the front end cover oil storage chamber, the rotating shaft oil inlet is communicated with the front end cover oil storage chamber, and the positions of the first rotating shaft oil outlet and the second rotating shaft oil outlet correspond to the positions of the front rotor end plate oil storage chamber and the rear rotor end plate oil storage chamber and are communicated with the positions of. The rotating shaft oil inlet and the first rotating shaft oil outlet and the second rotating shaft oil outlet are both oil discharging ports, and along with the rotation of the rotor, the oil discharging ports can conduct oil inlet and oil outlet in an all-round mode. The front rotor end plate is provided with front end cover oil outlet holes corresponding to the number of the partition plates, and each oil outlet hole is communicated with one branch oil storage chamber; the rear rotor end plate is provided with a plurality of rear end cover oil outlet holes corresponding to the number of the partition plates, and each oil outlet hole is respectively communicated with one branch oil storage chamber.
Furthermore, the oil inlet of the rotating shaft is large inside and small outside, and the oil outlets of the first rotating shaft and the second rotating shaft are small inside and large outside, so that the cooling oil is convenient to transfer and transport. The length of the obstruction is 1/10-1/4, preferably 1/6, of the length of the rotating shaft. 6-16 partition plates are respectively arranged on the front rotor end plate and the rear rotor end plate, and 6-16 oil outlets are correspondingly arranged on the front rotor end cover and the rear rotor end cover.
In another specific embodiment, cooling oil enters the front end cover oil storage chamber 2 through the front end cover oil inlet 1, and the front oil seal 21 and the rear oil seal 31 are respectively arranged at two ends of the front end cover oil storage chamber to form a closed oil storage chamber. Certain pressure (being greater than the centrifugal force of oil storage chamber position) is exerted through outside oil pump, and inside the cooling oil got into semi-hollow pivot through pivot oil inlet 3, the pivot front end passed through blocking member 41 and formed a hollow pivot, and along with the inside cooling oil increase of pivot, the cooling oil gradually goes to the terminal flow of axle, can take away the heat that the rotor produced this moment. Along with the increase of cooling oil in the shaft, under the action of centrifugal force, the cooling oil can respectively enter the front rotor end plate oil storage chamber 6 and the rear rotor end plate oil storage chamber 9 through the first rotating shaft oil outlet 5 and the second rotating shaft oil outlet 8. The front and rear rotor end plates, the rotating shaft and the rotor iron core respectively form 8 oil storage chambers. As shown in fig. 2 and 3, the circumferences of the front rotor end plate and the rear rotor end plate are respectively provided with 8 small holes, when certain cooling oil is in the oil storage chamber, the cooling oil can be uniformly sprayed on the stator winding under the action of centrifugal force to cool the motor stator. And finally, the cooling oil on the stator winding is deposited at the bottom of the motor under the action of gravity. Under the action of the internal pressure of the motor, cooling oil is discharged out of the motor from the front end cover oil outlet hole 12 and the rear end cover oil outlet hole 11 respectively.
The foregoing is a more detailed description of the invention, taken in conjunction with the accompanying preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described above. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (5)
1. The utility model provides an oil-cooled motor structure, includes the casing, its characterized in that: a rotating shaft and a stator core are arranged in the shell, a front end cover and a rear end cover are respectively arranged at two ends of the rotating shaft, a front end cover oil storage chamber is arranged between the front end cover and the rotating shaft, and a front oil seal and a rear oil seal are respectively arranged at two ends of the front end cover oil storage chamber, so that the front end cover oil storage chamber forms a closed oil storage chamber; the rotating shaft is of a hollow structure, a plugging piece is arranged at the front end of the rotating shaft, an oil inlet and an oil outlet are formed in the rotating shaft, a front rotor end plate and a rear rotor end plate are arranged on the rotating shaft, and a front rotor end plate oil storage chamber and a rear rotor end plate oil storage chamber are arranged between the front rotor end plate and the rotating shaft as well as between the rear rotor end plate and the stator core.
2. The oil-cooled motor structure according to claim 1, characterized in that: a front end cover oil storage chamber, a front rotor end plate oil storage chamber and a rear rotor end plate oil storage chamber are sequentially arranged around the rotating shaft; the rotating shaft is sequentially provided with a rotating shaft oil inlet, a first rotating shaft oil outlet and a second rotating shaft oil outlet, the position of the rotating shaft oil inlet corresponds to the position of the front end cover oil storage chamber, the rotating shaft oil inlet is communicated with the front end cover oil storage chamber, and the positions of the first rotating shaft oil outlet and the second rotating shaft oil outlet correspond to the positions of the front rotor end plate oil storage chamber and the rear rotor end plate oil storage chamber and are communicated with the positions of.
3. An oil-cooled electric machine structure according to claim 2, characterized in that: the front rotor end plate is provided with front end cover oil outlet holes corresponding to the number of the partition plates, and each oil outlet hole is communicated with one branch oil storage chamber; the rear rotor end plate is provided with a plurality of rear end cover oil outlet holes corresponding to the number of the partition plates, and each oil outlet hole is respectively communicated with one branch oil storage chamber.
4. The oil-cooled motor structure according to claim 1, characterized in that: the length of the obstruction is 1/10-1/4 of the length of the rotating shaft.
5. An oil-cooled electric machine structure according to claim 3, characterized in that: 6-16 partition plates are respectively arranged on the front rotor end plate and the rear rotor end plate, and 6-16 oil outlets are correspondingly arranged on the front rotor end cover and the rear rotor end cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921026397.6U CN209930091U (en) | 2019-07-03 | 2019-07-03 | Oil-cooled motor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921026397.6U CN209930091U (en) | 2019-07-03 | 2019-07-03 | Oil-cooled motor structure |
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| Publication Number | Publication Date |
|---|---|
| CN209930091U true CN209930091U (en) | 2020-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921026397.6U Active CN209930091U (en) | 2019-07-03 | 2019-07-03 | Oil-cooled motor structure |
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| Country | Link |
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| CN (1) | CN209930091U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111564927A (en) * | 2020-05-18 | 2020-08-21 | 珠海格力电器股份有限公司 | Hollow shaft sealing ring, hollow shaft, rotor structure, motor and electric automobile |
| CN113595312A (en) * | 2021-07-21 | 2021-11-02 | 苏州英磁新能源科技有限公司 | Internal circulation cooling motor |
-
2019
- 2019-07-03 CN CN201921026397.6U patent/CN209930091U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111564927A (en) * | 2020-05-18 | 2020-08-21 | 珠海格力电器股份有限公司 | Hollow shaft sealing ring, hollow shaft, rotor structure, motor and electric automobile |
| CN113595312A (en) * | 2021-07-21 | 2021-11-02 | 苏州英磁新能源科技有限公司 | Internal circulation cooling motor |
| CN113595312B (en) * | 2021-07-21 | 2024-02-02 | 苏州英磁新能源科技有限公司 | Internal circulation cooling motor |
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