CN201118076Y - Dc motor electrical brush - Google Patents
Dc motor electrical brush Download PDFInfo
- Publication number
- CN201118076Y CN201118076Y CNU2007200751839U CN200720075183U CN201118076Y CN 201118076 Y CN201118076 Y CN 201118076Y CN U2007200751839 U CNU2007200751839 U CN U2007200751839U CN 200720075183 U CN200720075183 U CN 200720075183U CN 201118076 Y CN201118076 Y CN 201118076Y
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- Prior art keywords
- brush
- motor
- electrographite
- electrical brush
- graphite block
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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.)
- Expired - Fee Related
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Abstract
The utility model discloses an electrical brush of a direct current motor, comprising a body, a pressing board, wires and a wire terminal, which is characterized in that: the body is an electrochemical graphite block; the pressing board is arranged on the top of the body; wires are arranged on the pressing board; one end of the wires are fixedly connected with the top of the electrochemical graphite block, and the other end is connected fixedly with the wire terminal; the electrochemical graphite block is two symmetrical pieces, and the two pieces of electrochemical graphite block prop against each other; an arc groove is also arranged outside each piece of electrochemical graphite block; the arc groove is arranged vertically along the surface of the electrochemical graphite block. With the arc groove, the electrical brush can prevent brush blocking and abnormal abrasion under overloaded states, and ensures the stable turning of the motor, thus increasing the service life of the electrical brush and the motor and reducing maintenance cost; with the special adhesive of the binding layer, the electrical brush can reduce the lateral current between the electrochemical graphite blocks and increase the vertical current, and can clean abraded carbon powder and dust; with the color changing board, the electrical brush can change the colors based on the temperature of the electrical brush, which can remind the maintenance staff to maintain on time.
Description
Technical field
The utility model relates to industrial drive unit, more particularly, relates to a kind of DC motor brush, and this brush can guarantee that the commutation of DC motor is stable, and prevents that wear of brush is unusual.
Background technology
DC motor all trades and professions use extensively, in the particularly roughing of metallurgy industry, the cold rolling and course of hot rolling, DC motor is important drive unit.At present, DC motor commonly used in the metallurgy industry mostly is from external import, as German SIEMENS, AEG and Mitsubishi heavy industry etc.The brush that uses on the DC motor adopts the import brush equally, as serial model No.s such as EG367j, EG98B, RX90.The type selecting of brush and the quality of commutation ability will directly have influence on the normal operation and the useful life of DC motor.The DC motor brush that with the serial model No. is EG367j is an example, see also shown in Figure 1, this brush 10 comprises body 11, pressing plate 12, lead 13 and conductor terminal 14, please again in conjunction with Fig. 2-shown in Figure 4, body 11 is the electrographite piece 111 of a slice cuboid, the top of body 11 is provided with pressing plate 12, and be connected and fixed with pressing plate 12, pressing plate 12 is provided with lead 13, lead 13 is four, lead 13 1 ends pass pressing plate 12 surface and are connected and fixed with the top of electrographite piece 111, and the other end is connected to conductor terminal 14.The brush 10 of this serial model No. in use, if the load of DC motor is in the normal range (NR) of 80-100%, the commutation ability of this brush 10 is more stable, wearing and tearing are normal, it is less to wear and tear, when but in case the motor operating load is bigger than normal, the actual load of this brush 10 increases, because the thermal coefficient of expansion of this brush 10 is lower, causes brush card brush easily, be the activity variation of brush in brush carrier, cause the motor commutation instability, even worsen and the generation ring fire, burn commutator for electric motor surface, destroyed the oxide-film dynamic equilibrium of motor simultaneously, cause the motivation commutator face to produce streak, groove, squeeze copper etc., make motoring be difficult to hold, and make brush 10 wearing and tearing serious unusually, even burn brush and brush carrier, make the motor can't operate as normal, must repair by off-line, thereby shortened useful life of brush and motor, increase the maintenance cost of motor, reduced economic benefit.
The utility model content
The shortcoming of wearing and tearing easily and causing brush card brush easily at above-mentioned commutation instability, the brush that causes DC motor easily that exists in the prior art, the purpose of this utility model provides a kind of DC motor brush, simple in structure, the superior performance of this brush can guarantee that the commutation of DC motor is stable.
For achieving the above object, the utility model adopts following technical scheme:
This DC motor brush comprises body, pressing plate, lead and conductor terminal, body is the electrographite piece, the body top is provided with pressing plate, pressing plate is provided with lead, and lead one end and electrographite piece top are connected and fixed, and the other end and conductor terminal are connected and fixed, described electrographite piece is two of symmetry, two electrographite pieces offset, and the outside of every electrographite piece also is provided with arc groove, and arc groove is provided with along electrographite piece surface longitudinal.
Also be provided with adhesive layer between the described electrographite piece, two electrographite pieces are bonding mutually by adhesive layer, and are connected and fixed.
The material of described adhesive layer is the special glue with self-insurance cleaning and adhesive function.
Also be provided with the variable color plate on the described pressing plate, and be connected and fixed with the variable color plate.
All be with insulating sleeve on the described lead.
Also be provided with annular knurl on the described conductor terminal.
In technique scheme, DC motor brush of the present utility model comprises body, pressing plate, lead and conductor terminal, body is the electrographite piece, and the body top is provided with pressing plate, and pressing plate is provided with lead, lead one end and electrographite piece top are connected and fixed, the other end and conductor terminal are connected and fixed, and the electrographite piece is two of symmetry, and two electrographite pieces offset, the outside of every electrographite piece also is provided with arc groove, and arc groove is provided with along electrographite piece surface longitudinal.This brush is simple in structure, esy to use, safe and reliable, can under overload state, prevent that brush card brush and wearing and tearing are unusual by arc groove is set, guarantee that motor commutation is stable, thereby increased the useful life of brush and motor, reduced maintenance cost; By the special glue of adhesive layer is set, not only can reduces the transverse current between the electrographite piece and increase longitudinal current, but also can clean the carbon dust of wearing and tearing and the dust of DC motor commutator face; Can carry out variable color according to the brush temperature by the variable color plate is set, thereby play the effect that the prompting maintenance personal in time checks.
Description of drawings
Fig. 1 is that the serial model No. of prior art is the perspective view of the DC motor brush of EG367j;
Fig. 2 is the structural representation of electrographite piece of the brush of prior art;
Fig. 3 is the schematic top plan view of electrographite piece shown in Figure 2;
Fig. 4 is the elevational schematic view of electrographite piece shown in Figure 2;
Fig. 5 is the perspective view of DC motor brush of the present utility model;
Fig. 6 is the structural representation of the electrographite piece of brush of the present utility model;
Fig. 7 is the schematic top plan view of electrographite piece shown in Figure 6;
Fig. 8 is the elevational schematic view of electrographite piece shown in Figure 6.
Embodiment
Further specify the technical solution of the utility model below in conjunction with drawings and Examples.
See also shown in Figure 5, DC motor brush 20 of the present utility model comprises body 21, pressing plate 22, lead 23 and conductor terminal 24, body 21 is an electrographite piece 211, please in conjunction with Fig. 6-shown in Figure 8, electrographite piece 211 is two of symmetry, and two electrographite pieces 211 offset, and the outside of every electrographite piece 211 also is provided with two arc grooves 212, the arc groove 212 of two electrographite pieces 211 is symmetrical, and along the 211 surface longitudinal settings of electrographite piece.Can make this brush 20 under overload state by arc groove 212, effectively prevent brush 20 in brush carrier the activity variation and cause that card brush and wearing and tearing are unusual, guarantee that motor commutation is stable, thereby increased the useful life of brush 20 and motor, reduced maintenance cost.Also be provided with adhesive layer between two electrographite pieces 211, two electrographite pieces 211 are bonding mutually by adhesive layer 213, and are connected and fixed.The material of adhesive layer 213 is the special glue with self-insurance cleaning and adhesive function, not only can bonding two electrographite pieces 211 by adhesive layer 213, but also can reduce the transverse current between the electrographite piece 211 and increase longitudinal current, and can clean the carbon dust of wearing and tearing generation and the dust of DC motor commutator face, prevent the suction of carbon dust and dust on brush 20 surfaces, cause commutator face to scratch, produce streak.Please consult shown in Figure 5ly again, the top of electrographite piece 211 is provided with pressing plate 22, and pressing plate 22 bottoms and electrographite piece 211 are connected and fixed, and the upper end also is provided with variable color plate 25, and is connected and fixed with variable color plate 25.This variable color plate 25 is the heat-sensitive variable colour plate, makes variable color plate 25 carry out variable color according to brush 20 variations in temperature by setting, for example, the safe temperature upper limit of brush 20 is set to 50 degree, when brush 20 temperature below 50 degree, this moment, the variable color plate 25 be a pink, showed that brush 20 is safe operation; Spend when brush 20 temperature surpass 50, variable color plate 25 becomes colourless, thereby bad or these brush 20 temperature drifts of ventilation cooling effect of prompting DC motor need hard stop to carry out the inspection and maintenance maintenance.Pressing plate 22 is provided with four leads 23; every lead 23 1 end and electrographite piece 211 tops are connected and fixed; the other end and conductor terminal 24 are connected and fixed; also be provided with insulating sleeve 231 on the every lead 23; insulating sleeve 231 is enclosed within lead 23 outsides; when motor operation; brush 20 can have certain scope of activities in brush carrier; be easy to generate friction mutually between the lead 23; wearing and tearing even fracture easily; make brush 20 lose commutation capacity, and produce commutation such as ring fire and worsen phenomenon, insulating sleeve 231 can play a protective role.Also be provided with annular knurl 241 on the conductor terminal 24, handle and when changing brush 20, to prevent to skid really, protect the stability of changing by annular knurl 241.In addition, can also be according to the motor actual condition, material parameter (comprising material type, coefficient of friction, current density, rupture strength, the coefficient of expansion, peripheral speed etc.) to electrographite piece 211 is optimized configuration, improve the adaptive capacity of this brush 20, strengthen the stability of brush 20.Distributing rationally can be with reference to following material parameter comparison table:
| Brush | The material type | Coefficient of friction | Current density | Rupture strength | The coefficient of expansion | Peripheral speed |
| The brush of EG367J | Electrographite | 0.20 | 15 A/c m 2 | 35KPa | Low | 50m/s |
| Brush of the present utility model | Electrographite | 0.25 | 18 A/c m 2 | 25-35K Pa | In | 50-55m /s |
In the past; serial model No. is that the DC motor brush of EG367j is in induction-motor load is the scope of 110-130%; commutation spark occurs and become big, brush inordinate wear phenomenon; attrition value is in 3～6mm/ month; after adopting DC motor brush of the present utility model; in induction-motor load is the scope of 70-130%; this commutation ability of brush is stable, adaptability is strong; commutation spark is controlled at secondary following (secondary is with the normal spark of subordinate); attrition value is in 1～2mm/ month; prolong about 50% the actual life of brush, and effect is fairly obvious.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, the modification of the above embodiment.
Claims (6)
1. DC motor brush, this brush comprises body, pressing plate, lead and conductor terminal, body is the electrographite piece, the body top is provided with pressing plate, and pressing plate is provided with lead, and lead one end and electrographite piece top are connected and fixed, the other end and conductor terminal are connected and fixed, and it is characterized in that:
Described electrographite piece is two of symmetry, and two electrographite pieces offset, and the outside of every electrographite piece also is provided with arc groove, and arc groove is provided with along electrographite piece surface longitudinal.
2. DC motor brush as claimed in claim 1 is characterized in that:
Also be provided with adhesive layer between the described electrographite piece, two electrographite pieces are bonding mutually by adhesive layer, and are connected and fixed.
3. DC motor brush as claimed in claim 2 is characterized in that:
Described adhesive layer is the glue-line with self-insurance cleaning and adhesive function.
4. DC motor brush as claimed in claim 1 is characterized in that:
Also be provided with the variable color plate on the described pressing plate, and be connected and fixed with the variable color plate.
5. DC motor brush as claimed in claim 1 is characterized in that:
All be with insulating sleeve on the described lead.
6. DC motor brush as claimed in claim 1 is characterized in that:
Also be provided with annular knurl on the described conductor terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200751839U CN201118076Y (en) | 2007-09-29 | 2007-09-29 | Dc motor electrical brush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200751839U CN201118076Y (en) | 2007-09-29 | 2007-09-29 | Dc motor electrical brush |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201118076Y true CN201118076Y (en) | 2008-09-17 |
Family
ID=39992664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200751839U Expired - Fee Related CN201118076Y (en) | 2007-09-29 | 2007-09-29 | Dc motor electrical brush |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201118076Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427283A (en) * | 2012-05-14 | 2013-12-04 | 海门市海菱碳业有限公司 | Combined carbon brush for electric polisher |
| CN103427306A (en) * | 2012-05-18 | 2013-12-04 | 海门市海菱碳业有限公司 | Carbon brush for combined angle polishing machine |
| CN103427302A (en) * | 2012-05-18 | 2013-12-04 | 海门市华联电碳有限公司 | Carbon brush for combination electric hammer |
| CN103427270A (en) * | 2012-05-16 | 2013-12-04 | 海门市华联电碳有限公司 | Carbon brush for electric grinder |
| CN103427287A (en) * | 2012-05-15 | 2013-12-04 | 海门市华联电碳有限公司 | Composite carbon brush for electric pick |
| CN103427304A (en) * | 2012-05-18 | 2013-12-04 | 海门市海菱碳业有限公司 | Novel carbon brush for angle grinder |
| CN103427291A (en) * | 2012-05-16 | 2013-12-04 | 海门市华联电碳有限公司 | Sandwich carbon brush for electric grinder |
| 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 |
| CN103996951A (en) * | 2013-02-19 | 2014-08-20 | 宝山钢铁股份有限公司 | Direct-current motor brush |
| CN110679044A (en) * | 2017-06-01 | 2020-01-10 | 申克碳素技术有限责任公司 | Discharge device for discharging current |
-
2007
- 2007-09-29 CN CNU2007200751839U patent/CN201118076Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427283A (en) * | 2012-05-14 | 2013-12-04 | 海门市海菱碳业有限公司 | Combined carbon brush for electric polisher |
| 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 |
| CN103427287A (en) * | 2012-05-15 | 2013-12-04 | 海门市华联电碳有限公司 | Composite carbon brush for electric pick |
| CN103427270A (en) * | 2012-05-16 | 2013-12-04 | 海门市华联电碳有限公司 | Carbon brush for electric grinder |
| CN103427291A (en) * | 2012-05-16 | 2013-12-04 | 海门市华联电碳有限公司 | Sandwich carbon brush for electric grinder |
| CN103427306A (en) * | 2012-05-18 | 2013-12-04 | 海门市海菱碳业有限公司 | Carbon brush for combined angle polishing machine |
| CN103427302A (en) * | 2012-05-18 | 2013-12-04 | 海门市华联电碳有限公司 | Carbon brush for combination electric hammer |
| CN103427304A (en) * | 2012-05-18 | 2013-12-04 | 海门市海菱碳业有限公司 | Novel carbon brush for angle grinder |
| CN103996951A (en) * | 2013-02-19 | 2014-08-20 | 宝山钢铁股份有限公司 | Direct-current motor brush |
| CN110679044A (en) * | 2017-06-01 | 2020-01-10 | 申克碳素技术有限责任公司 | Discharge device for discharging current |
| US11139625B2 (en) | 2017-06-01 | 2021-10-05 | Schunk Carbon Technology Gmbh | Discharge device for discharging electric currents |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080917 Termination date: 20160929 |