CN217935269U

CN217935269U - Oil seal structure and motor device

Info

Publication number: CN217935269U
Application number: CN202221237715.5U
Authority: CN
Inventors: 李明辰; 王钦普; 高文进; 姜晓琴; 任伟
Original assignee: Weichai Power Co Ltd; Weichai New Energy Technology Co Ltd
Current assignee: Weichai New Energy Power Technology Co ltd; Weichai Power Co Ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-11-29
Anticipated expiration: 2032-05-20

Abstract

The utility model discloses an oil blanket structure and motor device, the utility model discloses be provided with conductive coating on the surface that oil blanket structure and end cover contact support leaned on, like this the motor operation in-process, the axle current of production is along the conductive coating on the oil blanket structure and the bottom line conduction on the end cover, avoids axle current flow direction bearing raceway and rolling element, causes the bearing pitting to lose efficacy.

Description

Oil seal structure and motor device

Technical Field

The utility model relates to a sealed technical field, in particular to oil blanket structure and motor device.

Background

In the actual use process of the vehicle-mounted motor, the integral sealing performance of the motor is strictly required, so that the rotating shaft and the oil seal of the motor are required to have extremely high wear resistance, and the service life of the rotating shaft and the oil seal of the motor is required to cover the whole service life cycle of the motor as far as possible.

Meanwhile, when the motor shaft rotates, magnetic flux linkage of a rotating system can be generated due to unbalance of a magnetic circuit or phase current between the stator and the rotor, and potential difference can be generated between the rotor and the stator by the magnetic flux linkage to form shaft voltage. When a shaft voltage passes through a closed circuit formed by a rotor, a stator, a bearing, and the like, a shaft current is generated. If the shaft voltage is high or the lubricating oil film in the bearing is unstable at the pneumatic moment of the motor, the shaft voltage can discharge to break down the lubricating oil film in the bearing to form a shaft current. The bearing can be corroded by high temperature generated by partial discharge of shaft current, and noise and vibration in the running process of the motor can be increased after the bearing is corroded, so that the motor breaks down.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can improve motor device operational reliability's oil blanket structure. Another object of the utility model is to provide an electric machine with this oil blanket structure.

The utility model provides an oil seal structure, including the somatic part that has the centre bore, form the perisporium of centre bore has the lip region, this somatic part still has and leans on the surface of contact with the end cover, the surface is provided with conductive coating.

Optionally, the surface includes a straight end face and an outer peripheral wall, at least one of the straight end face and the outer peripheral wall having a conductive coating.

Optionally, the straight end face and the outer peripheral wall portion are both provided with the conductive coating.

Optionally, the conductive coating comprises a DLC coating.

Optionally, the lip region has a first wear resistant coating of a wear resistant material.

Optionally, the first wear resistant coating comprises a DLC coating.

Additionally, the utility model also provides a motor device, including motor and end cover, its characterized in that, above-mentioned arbitrary one is installed to the end cover oil-sealed structure, conductive coating with the end cover contact, the pivot of motor includes that the periphery wall spraying has the first shaft section of second wear-resistant coating, oil-sealed structure's lip region with the cooperation of first shaft section is sealed.

Optionally, the surface comprises a straight end face, the straight end face and the peripheral wall portion both sealingly abutting the end cap.

Optionally, the second wear resistant coating comprises a DLC coating or a titanium nitride coating.

The utility model discloses be provided with conductive coating on the surface that supports to support at oil blanket structure and end cover contact, like this the motor operation in-process, the axle electric current of production avoids axle electric current to flow to bearing raceway and rolling element along the conductive coating on the oil blanket structure and the base line conduction on the end cover, causes the bearing pitting to lose efficacy, and then plays the effect of protection bearing, improves motor device's operational reliability.

Drawings

Fig. 1 is a schematic structural diagram of an oil seal structure according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a rotating shaft of a motor according to an embodiment of the present invention;

fig. 3 is a schematic partial sectional view of an electric machine device according to an embodiment of the present invention.

Wherein, the one-to-one correspondence between the reference numbers and the part names in fig. 1 to 3 is as follows:

100-oil seal structure; 1 straight end face; 2 a lip region; 3 an outer peripheral wall portion;

200 rotating shafts; 201 a first shaft section;

300 end cap

400 bearing.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of an oil seal structure according to an embodiment of the present invention; fig. 2 is a schematic structural view of a rotating shaft of a motor according to an embodiment of the present invention; fig. 3 is a schematic partial sectional view of an embodiment of the motor apparatus according to the present invention.

The utility model provides a motor device, including motor, end cover 300 and oil blanket structure 100.

The motor includes a rotor, a stator (not shown in the figure), and bearings 400, and the bearings may be disposed at both ends of the rotating shaft 200 of the rotor, and are rotatably supported by the bearings to form axial positioning. An end cap 300 is typically mounted to the outside of the bearing, and the end cap 300 is fixedly mounted to the stator. The end cover 300 is further provided with an oil seal structure 100, the oil seal structure 100 can be installed inside the end cover 300 in an interference fit manner, and the oil seal structure 100 and the rotating shaft 200 are in sliding friction.

The utility model discloses an oil seal structure 100 is including the body part that has the centre bore, and the perisporium that forms the centre bore has lip region 2, lip region 2 and pivot 200 sliding friction. The body portion also has a straight end face 1 and an outer peripheral wall portion 3, the straight end face 1 being abuttingly contactable with the end cap 300, the outer peripheral wall portion 3 being at least partially axially mounted inside the end cap 300.

At least one of the straight end surface 1 and the peripheral wall portion 3 in the present invention has a conductive coating. The conductive coating may include tin oxide, conductive polymer composite, or the like, and the specific thickness of the conductive coating may be determined according to the specific use environment, and is not limited herein.

The utility model discloses be provided with conductive coating on the surface that oil blanket structure 100 and end cover 300 contact support leaned on, like this the motor operation in-process, the axle electric current that produces is along the conductive coating on the oil blanket structure 100 and the bottom line conduction on the end cover 300, avoids axle electric current flow direction bearing raceway and rolling element, causes the bearing pitting to lose efficacy.

Of course, the straight end face 1 and the outer circumferential wall portion 3 may both be provided with a conductive coating. The straight end faces and the conductive coating on the outer peripheral wall portion 3 may be joined for electrical conduction; of course, they may not be connected, i.e. the conductive coatings of the straight end face and the peripheral wall portion 3 are independent and not electrically connected to each other. The straight end face 1 and the outer peripheral wall portion 3 are both in sealing abutment with the end cap 300.

The lip region 2 of the present invention has a first wear resistant coating formed of a wear resistant material; the wear-resistant material can be DLC (Diamond-Like Carbon film for Chinese short), which is a protective film with hardness, friction, electrochemistry and other characteristics similar to those of Diamond, has excellent wear resistance and corrosion resistance, and has conductivity and can transmit current.

The utility model discloses a motor device oil blanket structure 100's conductive coating and the contact of end cover 300, the pivot 200 of motor include that the periphery wall spraying has the first shaft section 201 of the wear-resisting coating of second, and oil blanket structure 100's lip region 2 is sealed with the cooperation of first shaft section 201. The second wear resistant coating comprises a DLC coating or a titanium nitride coating.

Thus, the second wear-resistant coating can further improve the wear resistance of the motor rotating shaft 200 and prolong the service life of the motor rotating shaft 200.

The above is a detailed description of the oil seal structure 100 and the motor device provided by the present invention. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the scope of the appended claims.

Claims

1. An oil seal arrangement comprising a body portion having a central bore, a peripheral wall defining the central bore having a lip region, the body portion further having a surface for abutting contact with an end cap, the surface being provided with an electrically conductive coating.

2. An oil seal structure as defined in claim 1, wherein said surfaces include a straight end face and an outer peripheral wall portion, at least one of which has a conductive coating.

3. An oil seal structure as defined in claim 2, wherein said straight end face and said outer peripheral wall portion are each provided with said conductive coating.

4. An oil seal structure as defined in any one of claims 1 to 3, wherein said conductive coating layer comprises a DLC coating layer.

5. An oil seal arrangement as defined in any one of claims 1 to 3, wherein said lip region has a first wear resistant coating of a wear resistant material.

6. An oil seal structure as defined in claim 5, wherein said first wear-resistant coating comprises a DLC coating.

7. An electric machine device, comprising an electric machine and an end cover, wherein the end cover is provided with the oil seal structure of any one of claims 1 to 6, the conductive coating is in contact with the end cover, a rotating shaft of the electric machine comprises a first shaft section of which the outer peripheral wall is sprayed with a second wear-resistant coating, and a lip part area of the oil seal structure is matched and sealed with the first shaft section.

8. The electromechanical device of claim 7 wherein the surface comprises a straight end face, the straight end face and the peripheral wall portion each sealingly abutting the end cap.

9. The electromechanical device of claim 8, wherein the second wear resistant coating comprises a DLC coating or a titanium nitride coating.