CN103683632A - Insulating fixing structure for end cover and bearing sleeve of motor - Google Patents
Insulating fixing structure for end cover and bearing sleeve of motor Download PDFInfo
- Publication number
- CN103683632A CN103683632A CN201310675834.8A CN201310675834A CN103683632A CN 103683632 A CN103683632 A CN 103683632A CN 201310675834 A CN201310675834 A CN 201310675834A CN 103683632 A CN103683632 A CN 103683632A
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- insulating
- cover
- bearing sleeve
- end cover
- housing
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Abstract
The invention discloses an insulating fixing structure for an end cover and a bearing sleeve of a motor. The insulating fixing structure comprises the end cover and the bearing sleeve, wherein a hole is formed in the middle of the end cover, an overturned edge is outwards arranged at the front end of the bearing sleeve, threaded holes are evenly formed in the overturned edge of the bearing sleeve, through holes which correspond to the threaded holes formed in the bearing sleeve in a one-to-one mode are formed in the end cover, a bearing sleeve insulating portion is arranged on the outer wall of the lower end of the bearing sleeve, insulating sleeves are arranged in the through holes of the end cover respectively, insulating base plates are arranged at the two ends of each insulating sleeve respectively, a hole is formed in the middle of each insulating base plate, each pair of insulating base plates are arranged on the upper end face and the lower end face of the end cover respectively, the bearing sleeve and the end cover are tightly fixed through screws in a screwing mode, and the screws penetrate through the through holes with the insulating sleeves, and the threaded holes. The insulating fixing structure for the end cover and the bearing sleeve of the motor is simple in structure, reliable in insulation performance and low in cost, shaft currents can be effectively prevented from flowing, and thus a bearing of the motor is protected.
Description
Technical field
The present invention relates to End cover for motor field, the insulating fixing structure of especially a kind of End cover for motor and bearing holder (housing, cover).
Background technology
Motor reel electric current cannot be stopped, especially particularly evident in big-and-middle-sized adjustable frequency motor, badly influences the useful life of bearing of motor.Under normal circumstances, have the existence of lubricating oil film between rotating shaft and bearing, play the effect of insulation, for lower shaft voltage, this layer of lubricating oil film still can be protected its insulation property, can not produce shaft current.But when shaft voltage is increased to certain numerical value, especially when motor start-up or bearing oil starvation, lubricating oil film in bearing is stable formation not, shaft voltage will puncture oil film electric discharge and form loop, shaft current will be passed through from the metal contact of bearing and rotating shaft, because this metal contact is very little, so the current density of these points is very large, can reach hundreds of peace and even go up kilo-ampere, in moment, produce high temperature, make the local scorification of bearing, by the bearing metal of scorification, under the effect of grinding pressure, splashed, so burn many small ruts on bearing inner surface, destroyed the good fit of axle and bearing, thereby cause bearing normally to work.
Summary of the invention
The object of the invention is to make End cover for motor to have insulating effect, the insulating fixing structure of a kind of End cover for motor and bearing holder (housing, cover) is provided, blocking-up shaft current flows through the path of bearing, thereby protection bearing of motor extends motor useful life.
The technical solution used in the present invention is:
The insulating fixing structure of a kind of End cover for motor and bearing holder (housing, cover), include the end cap of middle part perforate, bearing holder (housing, cover), the front end of bearing holder (housing, cover) is outwards provided with flange, on the flange of bearing holder (housing, cover), be evenly provided with screwed hole, end cap be provided with bearing holder (housing, cover) on screwed hole through hole one to one, it is characterized in that: the lower end outer wall of described bearing holder (housing, cover) is provided with bearing holder (housing, cover) insulation, in each through hole of end cap, be respectively equipped with insulating sleeve, the insulating pad of perforate in the middle of the two ends of insulating sleeve are respectively equipped with, a pair of insulating pad is located at respectively the upper of end cap, on lower surface, bearing holder (housing, cover) and end cap are by running through the through hole with insulating sleeve, the screw of screwed hole screws to be marked closely.
Between end cap of the present invention and bearing holder (housing, cover), there is insulation, so motor reel electric current can not flow through bearing, bearing is not caused to damage, effectively protect bearing of motor, extend bearing useful life.
Advantage of the present invention:
The present invention is simple in structure, insulation is reliable, with low cost, can effectively block shaft current circulation, thus protection bearing of motor.
accompanying drawing explanation:
Fig. 1 is structural representation of the present invention.
embodiment:
By reference to the accompanying drawings specific embodiments of the present invention are described further.
As shown in Figure 1, the insulating fixing structure of a kind of End cover for motor and bearing holder (housing, cover), include the end cap 6 of middle part perforate, bearing holder (housing, cover) 1, the front end of bearing holder (housing, cover) 1 is outwards provided with flange, on the flange of bearing holder (housing, cover) 1, be evenly provided with screwed hole, end cap 6 be provided with bearing holder (housing, cover) 1 on screwed hole through hole one to one, the lower end outer wall of bearing holder (housing, cover) 1 is provided with bearing holder (housing, cover) insulation 2, in each through hole of end cap 6, be respectively equipped with insulating sleeve 3, the insulating pad 4 of perforate in the middle of the two ends of insulating sleeve 3 are respectively equipped with, 5, a pair of insulating pad 4, 5 are located at respectively the upper of end cap 6, on lower surface, bearing holder (housing, cover) 1 and end cap 6 are by running through the through hole with insulating sleeve 3, the screw of screwed hole screws to be marked closely.
Embodiment
First on bearing holder (housing, cover) 1, beat without latitude glass tape, outermost layer bag shrink belt, outside dimension stays 2-3mm allowance, then adopts VIP vacuum impregnation to cure, and solidify cooling rear axle bearing sleeve appearance and form stiff glass steel layer, then Vehicle Processing bearing holder (housing, cover) is to given size.End cap 6 processes on request, and 180 ℃ are cured two hours, adds the rear shrunk-in shaft bearing sleeve of insulating pad 4, adds after cooling insulating sleeve 3 and insulating pad 5, is finally assembled to shown in Fig. 1.
Claims (1)
1. the insulating fixing structure of an End cover for motor and bearing holder (housing, cover), include the end cap of middle part perforate, bearing holder (housing, cover), the front end of bearing holder (housing, cover) is outwards provided with flange, on the flange of bearing holder (housing, cover), be evenly provided with screwed hole, end cap be provided with bearing holder (housing, cover) on screwed hole through hole one to one, it is characterized in that: the lower end outer wall of described bearing holder (housing, cover) is provided with bearing holder (housing, cover) insulation, in each through hole of end cap, be respectively equipped with insulating sleeve, the insulating pad of perforate in the middle of the two ends of insulating sleeve are respectively equipped with, a pair of insulating pad is located at respectively the upper of end cap, on lower surface, bearing holder (housing, cover) and end cap are by running through the through hole with insulating sleeve, the screw of screwed hole screws to be marked closely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310675834.8A CN103683632A (en) | 2013-12-11 | 2013-12-11 | Insulating fixing structure for end cover and bearing sleeve of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310675834.8A CN103683632A (en) | 2013-12-11 | 2013-12-11 | Insulating fixing structure for end cover and bearing sleeve of motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103683632A true CN103683632A (en) | 2014-03-26 |
Family
ID=50320248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310675834.8A Pending CN103683632A (en) | 2013-12-11 | 2013-12-11 | Insulating fixing structure for end cover and bearing sleeve of motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103683632A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106487148A (en) * | 2015-08-24 | 2017-03-08 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of combination type electric motor end cap and motor |
-
2013
- 2013-12-11 CN CN201310675834.8A patent/CN103683632A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106487148A (en) * | 2015-08-24 | 2017-03-08 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of combination type electric motor end cap and motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140326 |