CN202178665U - Current eliminating device of motor shaft - Google Patents
Current eliminating device of motor shaft Download PDFInfo
- Publication number
- CN202178665U CN202178665U CN 201120325912 CN201120325912U CN202178665U CN 202178665 U CN202178665 U CN 202178665U CN 201120325912 CN201120325912 CN 201120325912 CN 201120325912 U CN201120325912 U CN 201120325912U CN 202178665 U CN202178665 U CN 202178665U
- Authority
- CN
- China
- Prior art keywords
- brush
- motor shaft
- support
- holder support
- brush holder
- 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 - Lifetime
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Abstract
The utility model provides a current eliminating device of a motor shaft. One end of a tubular support sleeved on the motor shaft is fixed to a bearing pressure plate or a motor end cover, an electric brush assembly is fixed to a radial hole on one side of the support, a carbon brush is arranged at the bottom of a conductive tube brush rod of the electric brush assembly, and a sleeve is sleeved on the upper portion of the brush rod to be fixed in adhesive mode. One end of a connecting sheet is inserted in an open slot arranged at the upper end of the brush rod in penetrating mode, a nut is screwed at the upper end of the brush rod to compact and fix the connecting sheet, and a pressure spring is arranged between the connecting sheet and the carbon brush. The sleeve is fixed to the radial hole of the support, the brush rod and the carbon brush are inserted in the radial hole, the pressure spring presses the lower end of the carbon brush to extend out of the brush rod to be contacted with a motor well, and wiring terminals at the outer end of the connecting sheet are connected with the ground through leads. The carbon brush enables shaft current of the motor shaft to be led to the connecting sheet through the brush rod, the connecting sheet is connected with the ground to eliminate the shaft current, and insulation bonding material layers are arranged between the brush rod and the sleeve and between the connecting sheet and the sleeve so as to guarantee insulation of the brush rod, the sleeve and the connecting sheet. The current eliminating device of the motor shaft can thoroughly eliminate the current of the motor shaft, prolongs service life of a motor bearing, is simple in structure and low in cost, and facilitates popularization.
Description
(1) technical field
The utility model relates to technical field of motors, is specially a kind of motor shaft electric current cancellation element.
(2) background technology
In motor operation course, if perhaps between motor shaft and bearing, shaft current is arranged at the diaxon socket end, will shorten greatly the useful life of motor bearings.Slight thousands of hours bearings of shaft current motor operation will damage, if shaft current is serious, motor can only move several hours.Directly influence safety in production, the direct and indirect economic loss of frequent change bearing also can not subtotal simultaneously.
The shaft voltage that is produced between motor diaxon socket end or motor rotary shaft and bearing causes the existence of shaft current.Shaft voltage produces reason and mainly contains following several kinds:
(1) the uneven shaft voltage that produces of magnetic
Segmental punching, the silicon steel sheet of closed assembly are added structures such as iron core slot, ventilation hole in the motor, cause to have unbalanced magnetic resistance in the motor magnetic circuit, and the alternating flux around the rotation cutting of motor shaft induces shaft voltage at the two ends of axle.
(2) the inversion power supply produces shaft voltage
When motor adopts the inversion powered operation; Because supply voltage contains the harmonic component than high order, under the effect of potential pulse component, produce electromagnetic induction between stator winding end winding, wiring part, the motor shaft; The current potential of motor shaft is changed, thereby produce shaft voltage.
(3) electrostatic induction produces shaft voltage
Around the scene of motor operation, more high-tension apparatus is arranged, under the effect of highfield, induce shaft voltage at the two ends of motor shaft.
(4) intervention of external power source produces shaft voltage
Because the operation field connection is more numerous and diverse, especially big electric motor protecting facility, measuring component wiring are more, as long as charged the end of a thread overlap joint is arranged on motor shaft, just can produce shaft voltage.
(5) other reasons
All might cause the generation of shaft voltage like factors such as the accumulation of electrostatic charge, temperature element damage in insulation.
Shaft voltage in case form path between motor shaft and support or housing, just produces shaft current after generating.The generation that this shows shaft current is difficult to avoid, and can only it be drawn elimination through the device of particular design, but does not occur being exclusively used in the device of eliminating the motor shaft electric current at present as yet.
(3) utility model content
The purpose of the utility model is a kind of motor shaft electric current cancellation element of design, comprises that the brush that directly contacts with motor shaft draws the ground connection elimination with shaft current.
The utility model designed motor shaft current cancellation element comprises brush assembly and support, and support is the cylindrical stent that is enclosed within on the motor shaft, and an end is fixed in bearing plate or electric motor end cap, and there is radial hole the side.Brush assembly is fixed in the radial hole of support one side.Brush assembly comprises carbon brush, brush holder support, sleeve pipe, stage clip, brace and nut.Brush holder support is a contact tube, and carbon brush is in brush holder support bottom, casing pipe sleeve on brush holder support top, the two bonding is fixing.Brush holder support upper end sidewall has the opening opposing groove, and an end of brace interts in the open slot of brush holder support.There are screw thread, nut to be spun on the brush holder support upper end on the brush holder support and are fixed brace.Stage clip is between brace and the carbon brush.Sleeve pipe is fixed on the radial hole of support, and brush holder support and carbon brush insert in this hole, and stage clip compressing carbon brush bottom is stretched out brush holder support and well contacted with motor shaft.
For the ease of drawing shaft current, the outer end of brace is furnished with binding post, and lead-in wire connects binding post and casing, support or other ground connection place.
Carbon brush is guided to brace with the shaft current of motor shaft through brush holder support, through lead-in wire shaft current ground connection is eliminated again.
In order to protect carbon brush not disturbed by external foreign matter and to influence its electrical property, the other end of support is equipped with protective cover.
Be back on the motor shaft through sleeve pipe for fear of shaft current, between brush holder support and the sleeve pipe, between brace and the sleeve pipe adhesive material layer is arranged all, guarantee the insulation of brush holder support and sleeve pipe, brace.
Be back on the motor shaft through nut for fear of shaft current, this nut is the ambroin nut.
The motor shaft electric current cancellation element advantage of the utility model is: 1, can thoroughly eliminate the motor shaft electric current, prolong the motor bearings working life; 2, stage clip scalable carbon brush guarantee that contact is good, and the electric efficiency influence can be ignored to the pressure of motor shaft; 3, cost simple in structure is low, and is easy to utilize.
(4) description of drawings
Fig. 1 is the overall structure sketch map of this motor shaft electric current cancellation element embodiment;
Fig. 2 is the enlarged diagram of Fig. 1 center brush assembly.
The figure internal label is: 1, brush assembly, 11, nut, 12, the insulation adhesive layer, 13, stage clip, 14, brush holder support, 15, carbon brush, 16, the brush pigtail, 17, sleeve pipe, 18, brace, 19, binding post, 2, protective cover, 3, motor shaft, 4, support.
(5) embodiment
Embodiment is as shown in Figure 1 for this motor shaft electric current cancellation element, comprises brush assembly 1 and support 4, and support 4 is for to be enclosed within the cylindrical stent on the motor shaft 3, and an end is fixed in bearing plate or electric motor end cap, and there is radial hole the side.Brush assembly 1 is fixed in the radial hole of support 4 one sides.Brush assembly 1 comprises carbon brush 15, brush holder support 14, sleeve pipe 17, stage clip 13, brace 18 and nut 11.Brush holder support 14 is a copper pipe, and carbon brush 15 is in brush holder support 14 bottoms, and sleeve pipe 17 is enclosed within brush holder support 14 tops, the two casting epoxy forms insulation adhesive layer 12.Brush holder support 14 upper end sidewalls have the opening opposing groove, and an end of brace 18 interts in the open slot of brush holder support 15.Nut 11 is spun on brush holder support 15 upper ends, is fixed brace 18.Stage clip 13 is between brace 18 and the carbon brush 15.Also be connected to brush pigtail 16 on the carbon brush 15, brush pigtail 16 passes stage clip 13,18 welding of brush pigtail 16 upper ends and brace, the length of brushing pigtail 16 less than brace 18 bottom surfaces to brush holder support 14 bottoms apart from 1mm～5mm.Brush pigtail 16 can be electric conducting material and makes, and also plays the effect of drawing shaft current, can also limit the length that stage clip 13 stretches out.Sleeve pipe 17 is fixed on the radial hole of support 4, and brush holder support 14 bottoms and carbon brush 15 insert in this hole, and stage clip 13 compressing carbon brush 15 bottoms are stretched out brush holder support 14 and well contacted with motor shaft 3.
The outer end of brace 18 is furnished with binding post 19, and lead-in wire connects binding post and casing, support or other ground connection place.
The other end of support 4 is equipped with protective cover 2.
The foregoing description is merely concrete example of purpose, technical scheme and beneficial effect further explain to the utility model, and the utility model is not to be defined in this.All any modifications of within the scope of disclosure of the utility model, being made, be equal to replacement, improvement etc., all be included within the protection range of the utility model.
Claims (5)
1. motor shaft electric current cancellation element is characterized in that:
Comprise brush assembly (1) and support (4), for to be enclosed within the cylindrical stent on the motor shaft (3), an end is fixed in bearing plate or electric motor end cap to support (4), and there is radial hole the side, and brush assembly (1) is fixed in the radial hole of support (4) one sides; Brush assembly (1) comprises carbon brush (15), brush holder support (14), sleeve pipe (17), stage clip (13), brace (18) and nut (11); Brush holder support (14) is a contact tube, and carbon brush (15) is in brush holder support (14) bottom, and sleeve pipe (17) is enclosed within brush holder support (14) top, the two bonding is fixing; Brush holder support (14) upper end sidewall has the opening opposing groove, and an end of brace (18) interts in the open slot of brush holder support (15), and brush holder support (14) upper end has screw thread, nut (11) to be spun on brush holder support (15) upper end, to be fixed brace (18); Stage clip (13) is between brace and the carbon brush (15), and sleeve pipe (17) is fixed on the radial hole of support (4), and brush holder support (14) bottom and carbon brush (15) insert in this hole, and stage clip (13) compressing carbon brush (15) bottom is stretched out brush holder support (14) and contacted with motor shaft (3).
2. motor shaft electric current cancellation element according to claim 1 is characterized in that:
The outer end of said brace (18) is furnished with binding post (19), and lead-in wire connects binding post (19) and casing, support or other ground connection place.
3. motor shaft electric current cancellation element according to claim 1 and 2 is characterized in that:
The other end of said support (4) is equipped with protective cover (2).
4. motor shaft electric current cancellation element according to claim 1 and 2 is characterized in that:
Between said brush holder support (14) and the sleeve pipe (17), between brace (18) and the sleeve pipe (17) the adhesive material layer is arranged all.
5. motor shaft electric current cancellation element according to claim 1 and 2 is characterized in that:
Also be connected to brush pigtail (16) on the said carbon brush (15), brush pigtail (16) passes stage clip (13), brush pigtail (16) upper end and brace (18) welding, the length of brush pigtail (16) less than brace (18) bottom surface to brush holder support (14) bottom apart from 1mm～5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120325912 CN202178665U (en) | 2011-09-01 | 2011-09-01 | Current eliminating device of motor shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120325912 CN202178665U (en) | 2011-09-01 | 2011-09-01 | Current eliminating device of motor shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202178665U true CN202178665U (en) | 2012-03-28 |
Family
ID=45868529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120325912 Expired - Lifetime CN202178665U (en) | 2011-09-01 | 2011-09-01 | Current eliminating device of motor shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202178665U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427267A (en) * | 2012-05-14 | 2013-12-04 | 海门市海菱碳业有限公司 | Composite carbon brush for electric polisher |
| CN103516143A (en) * | 2013-10-23 | 2014-01-15 | 中达电机股份有限公司 | Shaft current eliminating device |
| CN103683693A (en) * | 2013-12-03 | 2014-03-26 | 枣庄矿业集团新安煤业有限公司 | Motor rotary shaft discharger |
| CN103715812A (en) * | 2013-12-28 | 2014-04-09 | 王必生 | Motor end cover device capable of preventing shaft current |
| CN105703549A (en) * | 2014-12-09 | 2016-06-22 | 罗伯特·博世有限公司 | Motor provided with potential equilibrium device |
| CN110768440A (en) * | 2018-07-25 | 2020-02-07 | 湖南中车时代电动汽车股份有限公司 | Bearing protection device |
| CN112751443A (en) * | 2019-10-31 | 2021-05-04 | 中车株洲电力机车研究所有限公司 | Motor shaft voltage test structure |
-
2011
- 2011-09-01 CN CN 201120325912 patent/CN202178665U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427267A (en) * | 2012-05-14 | 2013-12-04 | 海门市海菱碳业有限公司 | Composite carbon brush for electric polisher |
| CN103516143A (en) * | 2013-10-23 | 2014-01-15 | 中达电机股份有限公司 | Shaft current eliminating device |
| CN103683693A (en) * | 2013-12-03 | 2014-03-26 | 枣庄矿业集团新安煤业有限公司 | Motor rotary shaft discharger |
| CN103715812A (en) * | 2013-12-28 | 2014-04-09 | 王必生 | Motor end cover device capable of preventing shaft current |
| CN105703549A (en) * | 2014-12-09 | 2016-06-22 | 罗伯特·博世有限公司 | Motor provided with potential equilibrium device |
| CN105703549B (en) * | 2014-12-09 | 2018-10-16 | 罗伯特·博世有限公司 | Motor with electric potential balancing device |
| CN110768440A (en) * | 2018-07-25 | 2020-02-07 | 湖南中车时代电动汽车股份有限公司 | Bearing protection device |
| CN112751443A (en) * | 2019-10-31 | 2021-05-04 | 中车株洲电力机车研究所有限公司 | Motor shaft voltage test structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUILIN ELECTRICAL EQUIPMENT SCIENTIFIC RESEARCH IN Free format text: FORMER NAME: GUILIN ELECTRICAL EQUIPMENT SCIENTIFIC RESEARCH INSTITUTE |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 541004 the Guangxi Zhuang Autonomous Region Guilin Qixing Road, No. 1 Patentee after: Guilin Electrical Equipment Scientific Research Institute Co., Ltd. Address before: 541004 the Guangxi Zhuang Autonomous Region Guilin Qixing Road, No. 1 Patentee before: Guilin Electrical Appliace Science Research Institute |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120328 |