CN208723721U - It is a kind of for eliminating the device of electric driving machinery of subway shaft voltage - Google Patents
It is a kind of for eliminating the device of electric driving machinery of subway shaft voltage Download PDFInfo
- Publication number
- CN208723721U CN208723721U CN201820686329.1U CN201820686329U CN208723721U CN 208723721 U CN208723721 U CN 208723721U CN 201820686329 U CN201820686329 U CN 201820686329U CN 208723721 U CN208723721 U CN 208723721U
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- CN
- China
- Prior art keywords
- cylinder
- screwed
- copper brush
- spring
- copper
- Prior art date
- 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.)
- Expired - Fee Related
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- Dc Machiner (AREA)
Abstract
The utility model discloses a kind of for eliminating the device of electric driving machinery of subway shaft voltage, including copper brush, leading-out copper wire, spring, connect cover, be screwed cylinder, connect cover is fixedly mounted on the non-traction end of motor, threaded hole is opened up in connect cover, copper brush is equipped in connect cover, spring, be screwed cylinder, the setting of copper brush face motor output shaft, spring one end is fixed on copper brush, spring other end, which is fixed on, to be screwed on cylinder, the drum outer wall that is screwed is equipped with external screw thread, the cylinder that is screwed is threadably mounted in threaded hole, one end of leading-out copper wire is connect with copper brush, the other end of leading-out copper wire is connect with the extraction jack being arranged in connect cover.The utility model is equipped with copper brush in the non-traction end of motor output shaft, and copper brush is extend out to outside motor by leading-out copper wire, shaft current can be introduced ground by copper brush and leading-out copper wire, to avoid shaft current by bearing, eliminate the possibility of bearing galvanic corrosion.
Description
Technical field
It is the utility model relates to motor field, in particular to a kind of for eliminating the device of electric driving machinery of subway shaft voltage.
Background technique
When using high-frequency power electronic devices transducer drive motor, high-frequency harmonic and common-mode voltage can be brought, in motor
There are capacitive coupling, armature spindles can generate shaft voltage in portion.If shaft voltage is greater than bearing lubricant insulation critical voltage, oil film will
It can puncture, to discharge between axis, bearing.When electric current is larger, the friction increasing that raceway generates groove, bearing will lead to
Greatly, while its service life will also substantially reduce.Especially when motor just starts, oil film is formed completely not yet, it is easier to be sent out
Raw breakdown generates groove.Current electric driving machinery of subway, for power generally in 100KW or so, the shaft voltage of measurement can reach 50-
100V, taking main measure is using insulation bearing or insulating sleeve, and armature spindle and casing cannot form access, avoid
The generation of shaft current.The major defect of the measure be it is with high costs, rely on import, shock resistance and heat dissipation performance are substantially not so good as
Conventional bearings.In addition it is widely used that shaft voltage is introduced the measure on ground by access brush on generating set.It is used when the method
In Generator Set, major defect is that installation is inconvenient, need to often replace carbon brush, and asking there are the bad control of ground resistance
Topic, in the occasion of some space requirements, the method is also not suitable for.
Summary of the invention
In order to solve the above-mentioned technical problem, the utility model provides the use that a kind of structure is simple, easy for installation, performance is stable
In the device for eliminating electric driving machinery of subway shaft voltage.
The technical solution that the utility model solves the above problems is: a kind of for eliminating the dress of electric driving machinery of subway shaft voltage
It sets, including copper brush, leading-out copper wire, spring, connect cover, be screwed cylinder, the connect cover is fixedly mounted on the non-traction end of motor,
It opens up threaded hole in the connect cover at face motor output shaft, is equipped with that copper brush, spring, be screwed cylinder and copper in connect cover
Brush, spring, the cylinder that is screwed linearly are arranged successively, and the copper brush face motor output shaft setting, spring one end is fixed on copper
It paints, spring other end, which is fixed on, to be screwed on an inner wall, and the drum outer wall that is screwed is equipped with the internal screw thread with threaded hole
The external screw thread to match, the cylinder that is screwed are threadably mounted in threaded hole by external screw thread, one end of the leading-out copper wire
It is connect with copper brush, the other end of leading-out copper wire is connect with the extraction jack being arranged in connect cover.
It is above-mentioned for eliminating the device of electric driving machinery of subway shaft voltage, the connect cover includes cylinder and capping, described
Cylinder is equipped with capping far from one end of motor, and the threaded hole is located at the center of capping, is provided with fixation hole on cylinder outer wall,
It passes through fixation hole with bolt cylinder is fixed on motor housing.
The internal diameter of the above-mentioned device for being used to eliminate electric driving machinery of subway shaft voltage, the cylinder that is screwed is exported greater than motor
The outer diameter of axis.
The above-mentioned device for being used to eliminate electric driving machinery of subway shaft voltage, the cylinder that is screwed are equipped with far from one end of copper brush
Cover.
The above-mentioned device for being used to eliminate electric driving machinery of subway shaft voltage, the copper brush are in the form of a column.
The above-mentioned device for being used to eliminate electric driving machinery of subway shaft voltage, the extraction jack size and measuring instrument interface are big
Small matching.
The utility model has the beneficial effects that:
1, the utility model is equipped with copper brush in the non-traction end of motor output shaft, and copper brush extend out to motor by leading-out copper wire
Outside, shaft current can be introduced by ground by copper brush and leading-out copper wire, to avoid shaft current by bearing, eliminates bearing galvanic corrosion
Possibility.
2, the utility model is equipped in connect cover and draws jack, can connect with externally measured instrument, the later period is facilitated to set
Standby inspection.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and examples.
As shown in Figure 1, the utility model include column copper brush 3, leading-out copper wire 4, spring 6, connect cover 7, draw jack 8,
Be screwed cylinder 9.
The connect cover 7 is fixedly mounted on the non-traction end of motor 1, as the support construction of whole device, the non-traction of motor 1
Hold no end cap；The connect cover 7 includes cylinder and capping, and the cylinder is equipped with capping far from one end of motor 1, described
The center of capping is equipped with threaded hole, is provided with fixation hole 5 on 1 shell of cylinder outer wall and motor, will across fixation hole 5 with bolt
Cylinder is fixed on 1 shell of motor.
Copper brush 3, spring 6 are equipped in connect cover 7, be screwed cylinder 9 and copper brush 3, spring 6, be screwed cylinder 9 linearly according to
Secondary arrangement, the end face setting of 3 face motor of copper brush, 1 output shaft 2,6 one end of spring are fixed on copper brush 3, spring 6 other one
End, which is fixed on, to be screwed on 9 inner wall of cylinder, and the decrement appropriate of spring 6 can be such that copper brush 3 comes into full contact with 1 output shaft 2 of motor,
Reduce contact resistance.9 outer wall of cylinder that is screwed is equipped with the external screw thread to match with the internal screw thread of threaded hole, described to be screwed
Cylinder 9 is threadably mounted in threaded hole by external screw thread, thus be screwed cylinder 9 can precession or back-out, with adjust copper brush 3 and
The distance of the non-traction end end face of 1 output shaft of motor 2, the cylinder 9 that is screwed are equipped with cover 10 far from one end of copper brush 3.
One end of the leading-out copper wire 4 is connect with copper brush 3, the other end of leading-out copper wire 4 with drawing in connect cover 7 is set
Jack 8 connects out, and external thread directly can pick out introducing ground from extraction jack 8.In addition 8 size of jack and measuring instrument are drawn
Apparatus measures when needing apparatus measures shaft voltage, can be popped one's head in be directly connected to and draw jack 8, Ke Yifang by the matching of interface size
Just rapid survey is realized.
The internal diameter of the cylinder 9 that is screwed is greater than the outer diameter of 1 output shaft 2 of motor, is screwed cylinder 9 by precession, can be with
In 1 output shaft 2 of motor is enclosed in, copper brush 3 as the compression of spring 6 and stay in and be screwed in cylinder 9, be screwed cylinder 9
Barrel can provide support for copper brush 3.
Claims (5)
1. a kind of for eliminating the device of electric driving machinery of subway shaft voltage, it is characterised in that: including copper brush, leading-out copper wire, spring,
Connect cover, be screwed cylinder, and the connect cover is fixedly mounted on the non-traction end of motor, face motor output shaft in the connect cover
Place opens up threaded hole, and copper brush, spring are equipped in connect cover, be screwed cylinder and copper brush, spring, is screwed cylinder linearly successively
Arrangement, the copper brush face motor output shaft setting, spring one end are fixed on copper brush, and it is solid that spring other end is fixed on screw thread
On safety barrel inner wall, the drum outer wall that is screwed is equipped with the external screw thread to match with the internal screw thread of threaded hole, the cylinder that is screwed
Be threadably mounted in threaded hole by external screw thread, one end of the leading-out copper wire is connect with copper brush, the other end of leading-out copper wire with
Extraction jack connection in connect cover is set；The internal diameter of the cylinder that is screwed is greater than the outer diameter of motor output shaft.
2. according to claim 1 for eliminating the device of electric driving machinery of subway shaft voltage, it is characterised in that: the connection
Cover includes cylinder and capping, and the cylinder is equipped with capping far from one end of motor, and the threaded hole is located at the center of capping,
It is provided with fixation hole on cylinder outer wall, fixation hole is passed through with bolt and cylinder is fixed on motor housing.
3. according to claim 1 for eliminating the device of electric driving machinery of subway shaft voltage, it is characterised in that: the screw thread
Fixed cylinder is equipped with cover far from one end of copper brush.
4. according to claim 1 for eliminating the device of electric driving machinery of subway shaft voltage, it is characterised in that: the copper brush
It is in the form of a column.
5. according to claim 1 for eliminating the device of electric driving machinery of subway shaft voltage, it is characterised in that: the extraction
Jack size is matched with measuring instrument interface size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820686329.1U CN208723721U (en) | 2018-05-09 | 2018-05-09 | It is a kind of for eliminating the device of electric driving machinery of subway shaft voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820686329.1U CN208723721U (en) | 2018-05-09 | 2018-05-09 | It is a kind of for eliminating the device of electric driving machinery of subway shaft voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208723721U true CN208723721U (en) | 2019-04-09 |
Family
ID=65970330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820686329.1U Expired - Fee Related CN208723721U (en) | 2018-05-09 | 2018-05-09 | It is a kind of for eliminating the device of electric driving machinery of subway shaft voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208723721U (en) |
-
2018
- 2018-05-09 CN CN201820686329.1U patent/CN208723721U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190409 Termination date: 20200509 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |