CN112260445A - Motor end sealing structure and motor - Google Patents
Motor end sealing structure and motor Download PDFInfo
- Publication number
- CN112260445A CN112260445A CN202010949177.1A CN202010949177A CN112260445A CN 112260445 A CN112260445 A CN 112260445A CN 202010949177 A CN202010949177 A CN 202010949177A CN 112260445 A CN112260445 A CN 112260445A
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- CN
- China
- Prior art keywords
- motor
- cover plate
- sealing cover
- seal
- sealing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/163—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at only one end of the rotor
Abstract
The invention relates to the technical field of motors, in particular to a motor end sealing structure and a motor. The invention relates to a motor end sealing structure which comprises a motor shell and a motor shaft, wherein a bearing matched with the motor shaft is arranged in the motor shell, and one end surface of the motor shell is provided with a mounting hole facing the bearing; a detachable sealing cover plate is arranged in the mounting opening of the motor shell; the sealing cover plate is provided with a fixing hole for the motor shaft to extend out; and a dynamic sealing element in contact with a motor shaft is arranged in the fixing hole of the sealing cover plate. The invention has the beneficial effects that: this motor tip seal structure is through increasing the sealed apron to install to sealed apron on with dynamic seal spare, sealed apron adopts and motor casing detachable design, has both reached the sealed of motor like this, not only conveniently changes or maintains impaired dynamic seal spare, also is convenient for add bearing lubricating grease to the bearing in the motor casing, makes follow-up maintenance process simpler and easier.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a motor end sealing structure and a motor.
Background
The motor is an electromagnetic device for realizing electric energy conversion or transmission according to an electromagnetic induction law. The motor is represented by letter M in the circuit, and its main function is to generate driving torque as the power source of electrical appliances or various machines, and the generator is represented by letter G in the circuit, and its main function is to convert mechanical energy into electric energy.
In order to meet the environmental requirements, the motor needs to reach a certain protection level. The motor tip seal structure who adopts at present is with dynamic seal part direct mount between motor casing and motor shaft, because generally adopt interference fit between dynamic seal part and the motor casing, the dynamic seal part is difficult for dismantling, and motor end cover bearing room has designed the axial bearing step, can't add bearing grease from the outside complete terminal surface of seeing the bearing of motor, and it is extremely inconvenient to maintain.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a motor end sealing structure and a motor to solve the problem that the follow-up maintenance is inconvenient because the movable sealing element is not easy to disassemble.
The technical scheme for solving the technical problems is as follows: a motor end sealing structure comprises a motor shell and a motor shaft, wherein a bearing matched with the motor shaft is arranged in the motor shell, and one end face of the motor shell is provided with a mounting hole facing the bearing; a detachable sealing cover plate is arranged in the mounting opening of the motor shell; the sealing cover plate is provided with a fixing hole for the motor shaft to extend out; and a dynamic sealing element in contact with a motor shaft is arranged in the fixing hole of the sealing cover plate.
Further, the dynamic sealing element is used for a rotary shaft, and the dynamic sealing element for the rotary shaft is in interference fit with the fixing hole of the sealing cover plate.
Furthermore, a concave spigot is reserved at the mounting opening of the motor shell, and a convex spigot in clearance fit with the concave spigot is reserved on the outer edge of the sealing cover plate; and a plurality of fastening screws connected with the female spigot of the motor shell are arranged at the male spigot of the sealing cover plate.
Furthermore, the sealing cover plate is a circular plate, and the fastening screws are uniformly distributed on the sealing cover plate.
Furthermore, a static sealing element is arranged between the convex spigot of the sealing cover plate and the concave spigot of the motor shell.
Further, the static sealing element is an O-shaped sealing ring.
The invention has the beneficial effects that: this motor tip seal structure is through increasing the sealed apron to install to sealed apron on, sealed apron adopts and motor casing detachable design, has so both reached the sealed of motor, through disassembling sealed apron, not only conveniently changes or maintains impaired dynamic seal spare, also is convenient for add bearing lubricating grease to the bearing in the motor casing, makes follow-up maintenance process simpler and easier.
The motor comprises a motor end sealing structure, a rotor assembly is arranged outside a motor shaft, and a stator assembly is arranged on the inner wall of a motor cavity.
The invention has the beneficial effects that: the motor with the motor end sealing structure has excellent sealing performance, and meanwhile, the internal parts of the motor shell are convenient to maintain subsequently, and the service life of the motor is greatly prolonged.
Drawings
FIG. 1 is a front view of the motor end seal structure of the present invention;
FIG. 2 is a sectional view showing the internal structure of the present invention;
FIG. 3 is an enlarged view taken at A of FIG. 2 in accordance with the present invention;
FIG. 4 is a front view of an improved front motor end seal arrangement;
fig. 5 is a sectional view of the internal structure of the improved front motor end sealing structure;
fig. 6 is a sectional view of the internal structure of the second embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the motor comprises a motor shell 101, a mounting hole 2, a motor shaft 3, a bearing 4, a sealing cover plate 401, a fixing hole 5, a dynamic sealing piece 6, a fastening screw 7, a static sealing piece 8, a rotor component 9 and a stator component.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1 and 2, a motor end sealing structure includes a motor housing 1 and a motor shaft 2, a bearing 3 matched with the motor shaft 2 is arranged in the motor housing 1, and an installation opening 101 facing the bearing 3 is formed in one end surface of the motor housing 1; a detachable sealing cover plate 4 is arranged in the mounting opening 101 of the motor shell 1; a fixing hole 401 for the motor shaft 2 to extend out is formed in the sealing cover plate 4; and a dynamic sealing element 5 contacted with the motor shaft 2 is arranged in the fixing hole 401 of the sealing cover plate 3. According to the invention, the detachable sealing cover plate 4 is additionally arranged on the motor shell 1, so that not only is the damaged dynamic sealing element 5 convenient to replace or maintain, but also bearing lubricating grease is convenient to add to the bearing 3 in the motor shell 1, and the subsequent maintenance process is simpler.
At present, in order to meet the environmental requirements, a motor needs to reach a certain protection level, most of new energy driving motors need to reach the IP67 protection level, and therefore a motor sealing structure needs to be considered during design, so that dust and water in the external environment of the motor cannot enter the motor. Because the motor shaft needs to stretch out of the motor shell for torque transmission, the dynamic and static connection parts are generally sealed by dynamic sealing parts, but the dynamic sealing parts are easily damaged parts and need to be replaced after a certain period of use, and meanwhile, the bearing close to the dynamic sealing parts also has the problem of poor lubrication of lubricating grease after the certain period of use, and the lubricating grease of the bearing needs to be added periodically.
The motor tip seal structure who adopts at present is with sealing part direct mount between motor casing and motor shaft, because generally adopt interference fit between dynamic seal and the motor casing, the dynamic seal is difficult for dismantling, and motor end cover bearing room has designed the axial bearing step, can't add bearing grease from the outside complete terminal surface of seeing the bearing of motor, and it is extremely inconvenient to maintain.
As shown in fig. 4 and 5, the motor end sealing structure is a sealing structure before improvement, the sealing structure before improvement is a sealing structure before improvement, a dynamic sealing part 5 is arranged between a motor shell 1 and a motor shaft 2 to form the protection grade of the motor, so that dust, water and the like can not enter the motor, and a bearing 3 is arranged between the motor shell 1 and the motor shaft 2, and the sealing structure needs to disassemble the dynamic sealing part 5 of a wearing part and add lubricating grease to the bearing 3 when the motor is maintained. Because dynamic seal 5 installs in motor casing 1 downthehole, and dynamic seal 5 outer lane and the cooperation of motor casing 1 be interference fit, dynamic seal 5 is difficult for dismantling. Meanwhile, after the movable sealing element 5 is disassembled, because the complete end surface of the bearing 3 cannot be seen, the lubricating grease is difficult to be added into the bearing 3.
According to the motor end sealing structure, the sealing cover plate 4 is additionally arranged, the dynamic sealing piece 5 is installed on the sealing cover plate 4, the sealing cover plate 4 is detachably designed with the motor shell 1, so that the sealing of the motor is achieved, the damaged dynamic sealing piece 5 is convenient to replace or maintain through disassembling the sealing cover plate 4, bearing lubricating grease is convenient to add to the bearing 3 in the motor shell 1, and the subsequent maintenance process is simpler.
The invention also provides the following preferred embodiments
Example one
As shown in fig. 1 and 2, a motor end sealing structure includes a motor housing 1 and a motor shaft 2, a bearing 3 matched with the motor shaft 2 is arranged in the motor housing 1, and an installation opening 101 facing the bearing 3 is formed in one end surface of the motor housing 1; a detachable sealing cover plate 4 is arranged in the mounting opening 101 of the motor shell 1; a fixing hole 401 for the motor shaft 2 to extend out is formed in the sealing cover plate 4; and a dynamic sealing element 5 contacted with the motor shaft 2 is arranged in the fixing hole 401 of the sealing cover plate 3.
It should be noted that dynamic seals are used to seal between relatively moving parts in a machine or apparatus. The dynamic seal is divided into a reciprocating dynamic seal and a rotary dynamic seal. The reciprocating dynamic seal comprises a forming packing seal, a packing box seal and an expansion ring seal. The rotary dynamic seal comprises: the movable part and the static part are directly contacted with each other; the two are not directly contacted with each other; the sealed semi-fluid dynamic seal is achieved by the special properties of the fluid added in the seal gap. The semi-fluid dynamic seal is provided with a magnetic fluid seal. Some machines and equipment must be absolutely sealed, some allow a small amount of leakage, so the structural style of the seal should be selected or designed according to the operating conditions such as the nature, temperature, pressure and relative speed of the working medium, the requirement of the sealing performance and the like.
In this embodiment, the dynamic seal 5 is a dynamic seal for a rotary shaft, and the dynamic seal for the rotary shaft is in interference fit with the fixing hole 401 of the sealing cover plate 3, so that a certain sealing property is provided between the dynamic seal and the sealing cover plate 4 while the motor shaft 2 can normally output torque.
In the present embodiment, as shown in fig. 3, a concave spigot is reserved at the mounting opening 101 of the motor housing 1, and a convex spigot in clearance fit with the concave spigot is reserved at the outer edge of the sealing cover plate 4; a plurality of fastening screws 6 connected with a concave spigot of the motor shell 1 are arranged at the convex spigot of the sealing cover plate 4; through the mode that protruding tang and concave tang mutually supported, guarantee the stability and the leakproofness that sealed apron 4 and motor casing 1 are connected, guaranteed the higher protection grade of motor tip seal structure.
Further, as shown in fig. 1, the sealing cover plate 4 is a circular plate, the fastening screws 6 are uniformly distributed on the sealing cover plate 4, and the disassembly and assembly of the sealing cover plate 4 are completed by disassembling and assembling the fastening screws 6.
In order to further improve the sealing performance between the sealing cover plate 4 and the motor housing 1, a static sealing element 7 is arranged between the male spigot of the sealing cover plate 4 and the female spigot of the motor housing 1.
It should be noted that a static seal is generally referred to as a seal between two stationary surfaces. By static seal is meant a seal which is stationary during operation of the bearing and has no relative movement. The seal without relative motion between the seal coupling parts is called static seal, and the seal without relative motion between the two coupling parts at the sealed part of the static seal is called static seal.
In this embodiment, the static seal 7 is an O-ring, and the O-ring is made of rubber.
Example two
As shown in fig. 6, an electric motor includes the motor end sealing structure, a rotor assembly 8 is disposed outside the motor shaft 2, and a stator assembly 9 is disposed on the inner wall of the cavity of the motor housing 1. The motor with the motor end sealing structure has excellent sealing performance, and is convenient for subsequent maintenance of internal parts of the motor shell 1, so that the service life of the motor is greatly prolonged
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A motor end sealing structure comprises a motor shell (1) and a motor shaft (2), wherein a bearing (3) matched with the motor shaft (2) is arranged in the motor shell (1), and the motor end sealing structure is characterized in that one end face of the motor shell (1) is provided with a mounting hole (101) which is opposite to the bearing (3); a detachable sealing cover plate (4) is arranged in the mounting opening (101) of the motor shell (1); a fixing hole (401) for the motor shaft (2) to extend out is formed in the sealing cover plate (4); and a movable sealing element (5) contacted with the motor shaft (2) is arranged in a fixing hole (401) of the sealing cover plate (3).
2. The motor end sealing structure according to claim 1, wherein the dynamic seal (5) is a dynamic seal for a rotary shaft which is in interference fit with a fixing hole (401) of the sealing cover plate (3).
3. The motor end sealing structure according to claim 1, wherein a concave spigot is reserved at the mounting opening (101) of the motor shell (1), and a convex spigot which is in clearance fit with the concave spigot is reserved at the outer edge of the sealing cover plate (4); the convex spigot of the sealing cover plate (4) is provided with a plurality of fastening screws (6) connected with the concave spigot of the motor shell (1).
4. The motor end sealing structure according to claim 3, wherein the sealing cover plate (4) is a circular plate, and a plurality of fastening screws (6) are uniformly distributed on the sealing cover plate (4).
5. The motor end seal according to claim 3, wherein a static seal (7) is provided between the male spigot of the seal cover plate (4) and the female spigot of the motor housing (1).
6. Motor end seal according to claim 5, characterized in that the static seal (7) is an O-ring seal.
7. An electric machine, characterized in that it comprises a machine end sealing structure according to any one of claims 1-6, the exterior of the machine shaft (2) is provided with a rotor assembly (8), and the inner wall of the cavity of the machine housing (1) is provided with a stator assembly (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010949177.1A CN112260445A (en) | 2020-09-10 | 2020-09-10 | Motor end sealing structure and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010949177.1A CN112260445A (en) | 2020-09-10 | 2020-09-10 | Motor end sealing structure and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112260445A true CN112260445A (en) | 2021-01-22 |
Family
ID=74231225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010949177.1A Pending CN112260445A (en) | 2020-09-10 | 2020-09-10 | Motor end sealing structure and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112260445A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216622A (en) * | 2013-04-25 | 2013-07-24 | 河北工业大学 | Rotating dynamic sealing structure |
| CN206323240U (en) * | 2016-12-29 | 2017-07-11 | 佳木斯电机股份有限公司 | IP56 degree of protection electric machines for roller axle insertion sealing structures |
| CN108429384A (en) * | 2018-03-26 | 2018-08-21 | 精进电动科技股份有限公司 | The sealing structure at motor-shaft extending end |
| CN208890518U (en) * | 2018-11-11 | 2019-05-21 | 横店集团英洛华电气有限公司 | High speed clockwise and anticlockwise motor end cap |
-
2020
- 2020-09-10 CN CN202010949177.1A patent/CN112260445A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103216622A (en) * | 2013-04-25 | 2013-07-24 | 河北工业大学 | Rotating dynamic sealing structure |
| CN206323240U (en) * | 2016-12-29 | 2017-07-11 | 佳木斯电机股份有限公司 | IP56 degree of protection electric machines for roller axle insertion sealing structures |
| CN108429384A (en) * | 2018-03-26 | 2018-08-21 | 精进电动科技股份有限公司 | The sealing structure at motor-shaft extending end |
| CN208890518U (en) * | 2018-11-11 | 2019-05-21 | 横店集团英洛华电气有限公司 | High speed clockwise and anticlockwise motor end cap |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210122 |
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| RJ01 | Rejection of invention patent application after publication |