CN209930084U - Ventilation structure of drive motor and transmission - Google Patents
Ventilation structure of drive motor and transmission Download PDFInfo
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- CN209930084U CN209930084U CN201920758999.4U CN201920758999U CN209930084U CN 209930084 U CN209930084 U CN 209930084U CN 201920758999 U CN201920758999 U CN 201920758999U CN 209930084 U CN209930084 U CN 209930084U
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- 230000005540 biological transmission Effects 0.000 title claims description 22
- 238000009423 ventilation Methods 0.000 title description 16
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 238000001914 filtration Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 27
- 238000004891 communication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
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Abstract
The utility model relates to a new energy automobile technical field discloses the structure of ventilating of driving motor and derailleur, including the connection casing of electric motor rotor axle and motor front end, its characterized in that: a sealing chamber connecting hole B is formed in the connecting shell on the front side of the bearing on the outer side of the motor rotor shaft, the sealing chamber connecting hole B is communicated with a connecting hole D formed in the connecting shell, the upper side of the connecting hole D is communicated with a motor stator outer edge communicating hole A formed in the connecting shell, and a ventilating device C is arranged on the top of the connecting hole D. The utility model discloses have and to reduce sealed room pressure effectively and reduce oil blanket oil leak risk, reduce the inside air pressure of motor simultaneously, reduce effects such as motor pivoted friction loss.
Description
Technical Field
The invention relates to the technical field of transformer accessories, in particular to a ventilation structure of a driving motor and a transmission.
Background
In a new energy pure electric vehicle power assembly, the new energy pure electric vehicle power assembly generally comprises a driving motor, a transmission, a motor controller and the like, and the motor and the transmission are connected through a bolt on a front mounting surface of the motor in the current mainstream structure. It specifically includes: the oil seal is arranged at the input shaft of the speed changer to prevent lubricating oil in the speed changer from leaking, the front cover of the motor is provided with a spigot which is matched with the speed changer, and after the speed changer is combined with the motor, the oil seal of the input shaft of the speed changer, the front bearing of the motor and the inner cylindrical surface of the spigot of the motor form an annular space.
In order to prevent external mud and water vapor from entering the annular space to cause rusting of an internal shaft and a spline, the prior method is to add one O-shaped ring seal on a spigot end face or an excircle, or to coat a sealant on a joint surface of a motor and a transmission. The new energy automobile driving motor has a high-speed trend at present, and a few motors reach 18000 rpm, when a rotor in the motor rotates at a high speed, the rotor has a centrifugal effect on air on two sides of the rotor, so that the air pressure on the outer side (close to a stator side) in the motor is high, the density is high, the pressure on the inner side (close to a bearing) is low, and the density is low.
Under the condition, the right space and the left space of the front bearing of the motor form pressure difference, the outer ring of the bearing and the front end cover are in clearance fit, air on two sides can be communicated mutually under the action of the pressure difference, and the annular space between the speed changer and the motor forms negative pressure, so that oil leakage of an input shaft oil seal of the speed changer is easily caused.
This is particularly true when the oil seal is worn.
The above situation will become more serious with the integrated design of the motor and the transmission and the increase of the motor speed in future.
Further, when the motor rotates at a high speed, the linear velocity outside the rotor is higher, and the density of air in contact with the rotor is high, the friction loss increases.
Disclosure of Invention
The invention aims to solve the problem that the ventilation structure of a driving motor and a transmission in the prior art has friction loss.
In order to achieve the purpose, the invention adopts the following technical scheme:
the structure of ventilating of driving motor and derailleur, including the connection casing of electric motor rotor axle and motor front end, its characterized in that: a sealing chamber connecting hole B is formed in the connecting shell on the front side of the bearing on the outer side of the motor rotor shaft, the sealing chamber connecting hole B is communicated with a connecting hole D formed in the connecting shell, the upper side of the connecting hole D is communicated with a motor stator outer edge communicating hole A formed in the connecting shell, and a ventilating device C is arranged on the top of the connecting hole D.
The ventilating device C is a two-way ventilating valve, the head of the ventilating device C is provided with a filtering membrane, and the upper part of the ventilating device C is provided with a cover cap.
Taking a measurement of the problems of the prior art, one can obtain: when the motor rotates at high speed, the centrifugal action of the rotor forms a pressure difference between the inner side of the rotating shaft center of the rotor and the outer side of the stator in the motor.
Outside pressure Pox (1+ α), inside pressure Pox (1- α)
(where Po is atmospheric pressure and α is the coefficient of pressure difference due to centrifugation.)
Internal and external pressure difference Pox (1+ alpha) -Pox (1-alpha) ═ 2Po alpha
This value will increase as the motor speed and motor rotor diameter increase.
The negative pressure on the inner side causes the space between the motor front bearing and the oil seal of the input shaft of the transmission to form negative pressure.
The negative pressure in the space can cause the pressure difference between two sides of the oil seal of the input shaft to be increased, the difficulty of sealing the lip of the oil seal is increased, and oil leakage is easily caused.
A method of operating a breather arrangement for a drive motor and a transmission, comprising:
the first condition is as follows: the channels A and B are communicated, the inner annular space is connected with the stator side of the motor in the state, the pressure is changed into Pox (1+ alpha) pressure which is larger than the atmospheric pressure, the pressure on the outer side of the oil seal rises, the oil leakage of the speed changer cannot happen, the pressure on the outer side of the motor is also higher than the atmospheric pressure, and the air friction loss is increased.
Case two: a and C are communicated, in this state, the outer side of the motor is connected with the atmosphere, at this time, if the average air pressure in the motor is P1, P1 x (1+ alpha) is Po, and the inner side is P1 (1-alpha) is Po (1-alpha)/(1 + alpha), namely, the inner side negative pressure is increased, the oil leakage risk of the oil seal is increased, but the side pressure of the rotor is reduced, which is beneficial to reducing the air friction loss.
Case three: the pressure of the sealing chamber is Po which is the same as the atmospheric pressure, the internal and external pressures of the oil seal are normal, the pressure can not change during working, and the oil cannot leak.
Case four: a and B are communicated with C, the inner side of a motor in a sealing chamber is communicated with the atmosphere, the outer side of the motor is communicated with the atmosphere, the pressure is Po, the working pressure of an oil seal cannot be changed, and the air friction loss of a rotor cannot be increased.
Compared with the prior art, the invention provides the ventilation structure of the driving motor and the transmission, which has the following beneficial effects:
1. the invention relates to a ventilation structure of a driving motor and a transmission, which solves the problem that the annular space of the motor has pressure difference when the motor works, and the friction loss is caused to parts such as an oil seal and the like.
2. The invention relates to a ventilation structure of a driving motor and a transmission, which reduces the oil leakage of a sealing device, simultaneously reduces the internal pressure of the motor and reduces the friction loss of the motor.
3. The present invention relates to a ventilating structure of driving motor and speed changer, and is characterized by that it can continuously make dynamic regulation of pressure difference and abrasion so as to attain the goal of dynamic balance.
4. The invention relates to a ventilation structure of a driving motor and a transmission, wherein a ventilation valve of the ventilation structure only allows air to flow in two directions and can prevent water molecules from entering and exiting, and a cover cap is arranged at the upper part of the ventilation structure to prevent silt and the like from adhering to influence the ventilation function.
5. The invention can effectively reduce the pressure of the seal chamber and the oil leakage risk of the oil seal, and simultaneously reduce the air pressure in the motor and the friction loss of the rotation of the motor.
The parts of the device not involved are the same as or can be implemented using prior art.
Drawings
FIG. 1 is a schematic view of a drive motor and transmission breather configuration;
FIG. 2 is a schematic diagram of a drive motor and transmission vent configuration;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-2, the ventilating structure of the driving motor and the transmission comprises a motor rotor shaft 1 and a connecting shell 2 at the front end of the motor, and is characterized in that: a sealing chamber connecting hole B4 is arranged on the connecting shell 2 at the front side of the bearing 3 on the outer side 1 of the motor rotor shaft, a sealing chamber connecting hole B4 is communicated with a connecting hole D5 arranged in the connecting shell, the upper side of the connecting hole D5 is communicated with a motor stator outer edge communicating hole A6 arranged on the connecting shell 2, and a ventilation device C7 is arranged at the top of the connecting hole D5.
The ventilating device C7 is a two-way ventilating valve, the head part of the ventilating device is provided with a filtering membrane, and the upper part of the ventilating device is provided with a cover cap.
The working method of the ventilation structure of the driving motor and the transmission comprises the following conditions:
the first condition is as follows: the outer edge communication hole A of the motor stator is communicated with the channel of the sealing chamber connection hole B, the inner side annular space is connected with the side of the motor stator in the state, the pressure is changed into Pox (1+ alpha) and is larger than the atmospheric pressure, the pressure on the outer side of the oil seal rises, the oil leakage of a speed changer cannot happen, the pressure on the outer side of the motor is also higher than the atmospheric pressure, and the air friction loss is increased.
Case two: the motor stator outer edge communication hole A is communicated with the ventilation device C, in the state, the outer side of the motor is connected with the atmosphere, at the moment, if the average air pressure in the motor is P1, P1 x (1+ alpha) is Po, and the inner side is P1 (1-alpha) is Po (1-alpha)/(1 + alpha), namely, the inner side negative pressure is increased, the oil leakage risk of an oil seal is increased, but the rotor side pressure is reduced, and the air friction loss is favorably reduced.
Case three: the pressure of the sealing chamber is Po which is the same as the atmospheric pressure, the internal and external pressures of the oil seal are normal, the pressure can not change during working, and the oil cannot leak.
Case four: the outer edge communication hole of the motor stator A is communicated with the sealing chamber connection hole B and the ventilation device C, the inner side of the motor of the sealing chamber is communicated with the atmosphere, the pressure is Po, the working pressure change of an oil seal cannot be caused, and the air friction loss of a rotor cannot be increased.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. The structure of ventilating of driving motor and derailleur, including the connection casing of electric motor rotor axle and motor front end, its characterized in that: a sealing chamber connecting hole B is formed in the connecting shell on the front side of the bearing on the outer side of the motor rotor shaft, the sealing chamber connecting hole B is communicated with a connecting hole D formed in the connecting shell, the upper side of the connecting hole D is communicated with a motor stator outer edge communicating hole A formed in the connecting shell, and a ventilating device C is arranged on the top of the connecting hole D.
2. The drive motor and transmission vent configuration of claim 1, wherein: the ventilating device C is a two-way ventilating valve, the head of the ventilating device C is provided with a filtering membrane, and the upper part of the ventilating device C is provided with a cover cap.
3. The drive motor and transmission vent configuration of claim 1, wherein: the sealing connecting hole B is an annular connecting hole and is arranged around the motor rotor shaft.
4. The drive motor and transmission vent configuration of claim 1, wherein: the connecting hole D is a vertical strip-shaped connecting hole.
5. The drive motor and transmission vent configuration of claim 1, wherein: the motor stator outer edge connecting hole A is a connecting hole which is perpendicular to the connecting hole D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920758999.4U CN209930084U (en) | 2019-05-24 | 2019-05-24 | Ventilation structure of drive motor and transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920758999.4U CN209930084U (en) | 2019-05-24 | 2019-05-24 | Ventilation structure of drive motor and transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209930084U true CN209930084U (en) | 2020-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920758999.4U Active CN209930084U (en) | 2019-05-24 | 2019-05-24 | Ventilation structure of drive motor and transmission |
Country Status (1)
| Country | Link |
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| CN (1) | CN209930084U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110061588A (en) * | 2019-05-24 | 2019-07-26 | 浙江鑫可精密机械有限公司 | The ventilating structure of driving motor and speed changer |
-
2019
- 2019-05-24 CN CN201920758999.4U patent/CN209930084U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110061588A (en) * | 2019-05-24 | 2019-07-26 | 浙江鑫可精密机械有限公司 | The ventilating structure of driving motor and speed changer |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231121 Address after: No.176, Gaoxin East 1st Road, Tongxiang Economic Development Zone, Tongxiang City, Jiaxing City, Zhejiang Province, 314500 Patentee after: Zhejiang Xinke Transmission Technology Co.,Ltd. Address before: No. 150, xitaihe Road, Jiaojiang District, Taizhou City, Zhejiang Province Patentee before: ZHEJIANG SIEKON PRECISION MACHINERY Co.,Ltd. |
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| TR01 | Transfer of patent right |