CN201877957U - Carbon brush of direct-current brush motor - Google Patents
Carbon brush of direct-current brush motor Download PDFInfo
- Publication number
- CN201877957U CN201877957U CN2010205995719U CN201020599571U CN201877957U CN 201877957 U CN201877957 U CN 201877957U CN 2010205995719 U CN2010205995719 U CN 2010205995719U CN 201020599571 U CN201020599571 U CN 201020599571U CN 201877957 U CN201877957 U CN 201877957U
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- carbon brush
- brush
- commutator
- positive
- negative electrode
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Abstract
The utility model discloses a carbon brush of a direct-current brush motor. One end of the carbon brush is connected with the positive electrode and the negative electrode of a power source, and the other end of the carbon brush is contacted with a commutator; the contact parts between the parts of the carbon brush at the positive electrode and the negative electrode and the commutator are different from each other; and the running tracks at the positive electrode and the negative electrode are not coincident with each other. The running tracks at the positive electrode and the negative electrode are not completely coincident with each other, so that the interactive adsorption and reaction of positive ions and anions between the positive electrode and the negative electrode are greatly reduced, therefore, the opportunity for forming sediment on the surface of the carbon brush is reduced, and the phenomenon that the carbon brush is disconnected from the commutator or is in bad contact with the commutator caused by the deposit is avoided. The design of the carbon brush has obvious advantages in alcohol gasoline pumps.
Description
Technical field
The utility model relates to a kind of carbon brush for electric machine, is specifically related to a kind of brush direct current motor carbon brush.
Background technology
The effect of carbon brush for electric machine in motor is exactly to change the sense of current, is used for changing rotor magnetic pole in direct current machine.Thereby change the motion of motor.Carbon brush is commutator or the slip ring that is used for motor, as the sliding contact body of deriving the importing electric current, and its conduction, heat conduction and greasy property are good, and have the instinct of certain mechanical strength and commutation property spark.It is the important composition parts of motor.
The effect of carbon brush for electric machine in motor: foreign current (exciting current) is added to (input current) carbon brush for electric machine on the rotor of rotation by carbon brush; Electrostatic charge on the macro-axis is introduced the earth (ground connection carbon brush) (output current) through carbon brush; Change the sense of current (in commutator machine, brush also plays the commutation effect); With macro-axis () cause protective device for rotor earth fault protection and measure the positive and negative voltage to earth of rotor.
At present, as shown in Figure 1, the conventional same carbon brush of the many employings of Oil pump electrical machinery carbon brush design, promptly two carbon brush one ends are connected with positive and negative power supply by lead and terminal respectively, an other end contacts with commutator, electric current is delivered to commutator and motor-spin-coil through carbon brush, thereby drive motors rotates.The running track of two carbon brush of both positive and negative polarity overlaps.This design is no problem in the oil product of routine, if but be applied in high oil of ion concentration or the liquid (such as methyl alcohol, ethanol), because the carbon brush track overlaps, both positive and negative polarity ion-exchange is frequent, reacts to each other thereby produce, and forms a large amount of deposits on the carbon brush surface, finally cause carbon brush and commutator loose contact or open circuit, oil pump performance is declined to a great extent even lost efficacy.
The utility model content
Technical problem to be solved in the utility model provides a kind of brush direct current motor carbon brush, it can reduce the mutual absorption and the reaction of negative ions between the both positive and negative polarity, thereby reduced the carbon brush surface and formed sedimental chance, avoided carbon brush because sedimental former thereby and commutator disconnection or loose contact.
In order to solve above technical problem, the utility model provides a kind of brush direct current motor carbon brush; Carbon brush one end is connected with power positive cathode respectively, and an other end contacts with commutator; Described both positive and negative polarity carbon brush is different with the commutator contact portion, and its movement locus does not overlap.
The beneficial effects of the utility model are: because both positive and negative polarity running track does not overlap fully, the mutual absorption and the reaction of negative ions between the both positive and negative polarity have been reduced greatly, thereby reduced the carbon brush surface and formed sedimental chance, avoid carbon brush because sedimental former thereby and commutator disconnects or loose contact, the advantage of this design in the alcohol gasoline pump is especially obvious.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is existing brush direct current motor schematic diagram;
Fig. 2 is the described brush direct current motor schematic diagram of the utility model embodiment.
Embodiment
As shown in Figure 2, described carbon brush 1 one ends of the utility model embodiment are connected with power supply by lead 2 and terminal, and an other end contacts with commutator 3, and electric current is delivered to commutator 3 and motor-spin-coil through carbon brush 1, thereby drive motors rotates.Carbon brush 1 is an important ring of delivered current, carbon brush 1 and the commutator 3 common commutation function that realize.
Stairstepping carbon brush 1 is adopted in carbon brush design described in the utility model, and both positive and negative polarity carbon brush 1 and commutator 3 contact traces do not overlap fully.Its advantage is because both positive and negative polarity running track does not overlap fully, the mutual absorption and the reaction of negative ions between the both positive and negative polarity have been reduced greatly, thereby reduced carbon brush 1 surface and formed sedimental chance, avoid carbon brush 1 because sedimental former thereby and commutator 3 disconnect or loose contacts, the advantage of this design in the alcohol gasoline pump is especially obvious.
Show according to test, use the oil pump of stepped carbon brush 1 described in the utility model in M15 (15% methanol gasoline), to pass through the 2000hrs life test smoothly, and carbon brush surface deposit-free, and the oil pump that uses normal carbon brush only has minority to pass through test, and decreased performance is serious, and the carbon brush surface deposits is many.
The utility model is not limited to execution mode discussed above.More than the description of embodiment is intended in order to describe and illustrate the technical scheme that the utility model relates to.Based on the conspicuous conversion of the utility model enlightenment or substitute and also should be considered to fall into protection range of the present utility model.Above embodiment is used for disclosing best implementation method of the present utility model, so that those of ordinary skill in the art can use numerous embodiments of the present utility model and multiple alternative reaches the purpose of this utility model.
Claims (5)
1. brush direct current motor carbon brush; Carbon brush one end is connected with power positive cathode respectively, and an other end contacts with commutator;
It is characterized in that described both positive and negative polarity carbon brush is different with the commutator contact portion, its movement locus does not overlap.
2. brush direct current motor carbon brush as claimed in claim 1 is characterized in that, described carbon brush is two.
3. brush direct current motor carbon brush as claimed in claim 1 is characterized in that, described carbon brush one end is connected with power supply by lead and terminal.
4. brush direct current motor carbon brush as claimed in claim 1 is characterized in that described carbon brush is stairstepping.
5. brush direct current motor carbon brush as claimed in claim 1 is characterized in that, described carbon brush the two poles of the earth running track does not overlap fully.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205995719U CN201877957U (en) | 2010-11-10 | 2010-11-10 | Carbon brush of direct-current brush motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205995719U CN201877957U (en) | 2010-11-10 | 2010-11-10 | Carbon brush of direct-current brush motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201877957U true CN201877957U (en) | 2011-06-22 |
Family
ID=44165865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205995719U Expired - Lifetime CN201877957U (en) | 2010-11-10 | 2010-11-10 | Carbon brush of direct-current brush motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201877957U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102468716A (en) * | 2010-11-10 | 2012-05-23 | 联合汽车电子有限公司 | Direct-current brush motor carbon brush |
-
2010
- 2010-11-10 CN CN2010205995719U patent/CN201877957U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102468716A (en) * | 2010-11-10 | 2012-05-23 | 联合汽车电子有限公司 | Direct-current brush motor carbon brush |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110622 |