CN219065553U - Carbon brush assembly for dynamic test of brushless exciter generator rotor - Google Patents
Carbon brush assembly for dynamic test of brushless exciter generator rotor Download PDFInfo
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- CN219065553U CN219065553U CN202223363229.0U CN202223363229U CN219065553U CN 219065553 U CN219065553 U CN 219065553U CN 202223363229 U CN202223363229 U CN 202223363229U CN 219065553 U CN219065553 U CN 219065553U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model relates to a carbon brush assembly for a dynamic test of a brushless exciter generator rotor, which comprises a carbon brush bracket, a collecting ring, a carbon brush and a carbon brush outgoing line; the carbon brush support comprises a brush holder fixing support, an insulating plate and a brush holder, wherein the brush holder fixing support and the brush holder are fixedly connected with the insulating plate; the collecting ring comprises a body, the body, an anode slip ring, a cathode slip ring and an insulator, wherein the body is fixedly connected with the insulator, the anode slip ring and the cathode slip ring are fixedly connected with the insulator at intervals, and the anode slip ring and the cathode slip ring are provided with anode and cathode lead posts of a rotor; the carbon brush is connected with the brush frame and is also connected with an anode slip ring or a cathode slip ring; and the carbon brush outgoing line is electrically connected with the carbon brush. By using the carbon brush assembly, the problems that potential safety hazards exist in personnel operation and the ignition phenomenon continuously occurs on the contact surface are solved, the accuracy and success rate of test results are improved, and meanwhile, the fuel waste caused by restarting is reduced.
Description
Technical Field
The utility model relates to the field of brushless excitation engines, in particular to a carbon brush assembly for a dynamic test of a rotor of a brushless excitation generator.
Background
The carbon brush is also called an electric brush, is similar to a rubber strip, and is led out by a wire at the top, and has a large volume. Carbon brushes are widely used as a sliding contact in many electrical devices. The carbon brush is mainly made of electrochemical graphite, impregnated graphite and metal (copper and silver containing) graphite in the application of products. The carbon brush is a device for transmitting energy or signals between a fixed part and a rotating part of a motor, a generator or other rotary machinery, is generally made of pure carbon and a coagulant, is generally square in shape, is clamped on a metal bracket, is tightly pressed on a rotating shaft by a spring, and transmits electric energy to a coil through a phase changer when the motor rotates. The replacement should be maintained regularly and the carbon deposit should be cleaned. Carbon brushes have the following disadvantages: the wear is easy, the service life is short, and the replacement is needed frequently; the carbon brush is often ignited, so that the hydrogen-cooled generator is inflammable and explosive, and has great potential safety hazard; when the carbon brush is used, the carbon brush can be damaged due to high temperature generated by friction; the spring pressure of each carbon brush is inconsistent to adjust, so that the pressure is difficult to control synchronously, and the adjustment is difficult; the carbon brush is often required to be replaced in the operation of the generator, manual operation is required, the operation process is complicated, the steps are more, and electric shock accidents are easy to occur. In the operation of the generator, the generator cannot be stopped for processing only by replacing the carbon brush, and the manpower and material resources of random stopping have huge economic losses; therefore, the generator is frequently replaced by electrification in operation, the exciting direct current of the rotor of the large-sized generator can reach thousands of amperes, and the operation needs to be extremely careful so as to prevent electric shock accidents; carbon brush abrasion is more, carbon dust accumulation is often generated, ignition is easy, and frequent manual cleaning is needed; carbon brushes have different quality and are often damaged, so that equipment can safely and stably run, and hidden danger is buried.
In recent years, the brushless excitation technology is also advancing continuously, and the existing brushless excitation device is a brushless exciter, and the excitation mode is divided into controllable excitation and controllable compound excitation, which has the following disadvantages: the brushless exciter has a complex structure and strict process requirements; the length of a rotor shaft system of the generator is increased, so that the balance degree of the rotor of the generator is increased, and the adjustment is not easy; during the operation of the generator, the rotor rotates higher; the addition of the brushless exciter also increases parts such as the bearing bush, so that the volume of the generator is increased, the occupied area is increased, and the investment cost is increased; the damage of the rotary silicon rectifier, the rotary fuse, the exciting coil, the wiring and the like in the brushless exciter is not easy to be perceived, and the brushless exciter can only be stopped for maintenance, and has the advantages of complex maintenance, high difficulty coefficient and high maintenance cost; the brushless exciter has large electromagnetic inertia and poor dynamic adjustment characteristic; the exciting current and exciting voltage of the brushless exciter cannot be directly monitored, can only be estimated from the outlet current and outlet voltage of the generator, has larger deviation, brings difficulty to the adjustment of the current and voltage of the generator, and can only be adjusted by virtue of the experience of technicians; the coil of the brushless exciter and the rotary silicon rectifier are poor in heat dissipation, cannot monitor temperature, are in a high-temperature state for a long time, reduce the insulating property of equipment, and reduce the service life of the equipment. Two-point grounding protection of the generator rotor cannot be installed; when the generator trips or is normally stopped, the magnetic field of the rotor of the generator cannot be completely killed due to the irreversibility of the rotary silicon rectifying device, and accidents are easy to occur.
The power plant gas turbine generator belongs to brushless excitation generator, when the generator rotor is used for carrying out dynamic alternating current impedance test, current is required to be applied under the dynamic working condition of 0-3000rpm of the rotor, and the method used in the prior art is that the soft copper braid belt is wrapped on the top of the insulating rod to be propped against the self-made slip ring for test. In the method, because the rotating speed of the rotor is too high, potential safety hazards exist for personnel holding the insulating rod; the insulating rod is sprung out for many times, the contact failure leads to the contact surface to continuously appear striking sparks, experimental data have errors, and the result is not ideal after many times of experiments.
Therefore, when the brushless excitation generator rotor is subjected to a dynamic alternating current impedance test, potential safety hazards exist due to the fact that personnel are required to operate the rotor in a short distance, meanwhile, the problem that the ignition phenomenon continuously occurs on the contact surface due to poor contact is solved, the accuracy and success rate of test results are insufficient, the test is failed, reworking is restarted, and fuel waste is caused.
Disclosure of Invention
In order to solve the technical problems, the utility model discloses a carbon brush assembly for a dynamic test of a brushless exciter generator rotor.
The utility model provides a brushless exciter generator rotor dynamic test's carbon brush subassembly, includes carbon brush support, collecting ring, carbon brush and carbon brush lead-out wire, the carbon brush support includes interconnect's insulation board and brush yoke, the collecting ring includes anodal sliding ring, negative pole sliding ring and insulator, anodal sliding ring and negative pole sliding ring interval connection the insulator, the carbon brush is connected the brush yoke, the carbon brush is still connected anodal sliding ring or negative pole sliding ring, the carbon brush lead-out wire electricity is connected the carbon brush. When the dynamic alternating current impedance test of the generator is performed, the collecting ring is fixedly connected with the rotor end of the generator exciter, then the positive slip ring and the negative slip ring are connected with the rotor winding of the generator by using a lead, then the two carbon brush supports are respectively fixedly connected with the stator shell of the generator exciter, the carbon brushes connected with the two brush holders are respectively tightly attached to the positive slip ring and the negative slip ring, and the test wire is connected with the carbon brush outgoing line; the carbon brush assembly for the dynamic test of the brushless exciter generator rotor has the following advantages:
1. the safety of personnel during dynamic test of the generator rotor is improved;
2. the problem of poor contact in the test is solved, and the condition of ignition of a contact surface is eliminated;
3. the accuracy and success rate of test results are improved;
4. and the fuel waste caused by test failure and reworking restarting is avoided.
Preferably, the carbon brush support is further provided with a brush holder fixing support, the brush holder fixing support is fixedly connected with the insulating plate, and the brush holder fixing support can be fixedly connected with a screw hole on the stator shell of the generator exciter. The carbon brush support is fixed in engine exciter stator shell screw hole, compares traditional ground fixed bolster, has reduced the construction degree of difficulty when having reduced the consumptive material, can be on the basis of not destroying original structure quick assembly disassembly.
Preferably, the brush holder is fixedly connected with the insulating plate.
Preferably, the collecting ring further comprises a body, the body is fixedly connected with the insulator, and the body is further provided with a fixed screw hole which can be fixedly connected with the rotor end of the generator exciter.
Preferably, the insulator, the positive slip ring and the negative slip ring are all in tubular structures, and the positive slip ring and the negative slip ring are fixedly sleeved on the insulator.
Preferably, the positive slip ring and the negative slip ring are further provided with rotor positive and negative lead posts.
Preferably, the brush holder has a hollow structure, and the carbon brush is inserted into the hollow part of the brush holder.
Preferably, a wire hole is formed in the carbon brush, and the outgoing wire of the carbon brush is inserted into the wire hole and fixedly connected with the outgoing wire through a clamping screw. The carbon brush and the carbon brush outgoing line can be reliably and electrically connected.
Preferably, a pressure spring is arranged in the brush holder, one end of the pressure spring is fixedly connected with the brush holder, and the other end of the pressure spring is connected with the end face of the carbon brush. And the tail part of the carbon brush is pressed and fixed by using a pressure spring, and after the carbon brush is installed, the carbon brush is polished, and the radian of the contact surface of the carbon brush and the slip ring is closely attached.
Preferably, the insulating plate is made of a composite insulating material, the positive slip ring and the negative slip ring are made of stainless steel materials, the insulator is made of high-strength insulating resin, and the carbon brush is made of a Morgan graphite material. The insulating plate and the insulator can be guaranteed to have the characteristics of high pressure resistance, flame retardance, heat resistance, high temperature resistance and corrosion resistance, the positive slip ring and the negative slip ring have the characteristics of high temperature resistance and corrosion resistance, the carbon brush is convenient to maintain in the later period, has the characteristics of high temperature resistance, high melting point, easiness in conduction and self lubrication, and the service life of the slip ring can be prolonged to a certain extent.
Drawings
Fig. 1 is a schematic structural diagram of a carbon brush assembly for a dynamic test of a rotor of a brushless exciter generator.
The meaning of each reference numeral in the above figures is as follows: the device comprises a 1-carbon brush support, a 2-collecting ring, a 3-carbon brush, a 4-carbon brush outgoing line, an 11-insulating plate, a 12-brush holder fixing support, a 13-brush holder, a 21-body, a 22-positive slip ring, a 23-negative slip ring, a 24-insulator and a 25-rotor positive and negative lead wire column.
Detailed Description
A specific embodiment of a carbon brush assembly for a dynamic test of a rotor of a brushless exciter generator according to the present utility model will be described with reference to fig. 1.
The carbon brush assembly for the brushless exciter generator rotor dynamic test comprises a carbon brush support 1, a collecting ring 2, a carbon brush 3 and a carbon brush outgoing line 4, wherein the carbon brush support 1 comprises an insulating plate 11, a brush holder fixing support 12 and a brush holder 13, the brush holder fixing support 12 and the brush holder 13 are respectively and fixedly connected with the insulating plate 11, the insulating plate 11 is made of a composite insulating material, the brush holder fixing support 12 is made of a 5mm steel plate, and the brush holder fixing support 12 can be fixedly connected with screw holes on a generator exciter stator shell; the collecting ring 2 comprises a body 21, a positive electrode slip ring 22, a negative electrode slip ring 23, an insulator 24 and a rotor positive electrode lead wire column 25, wherein the body 21 is made of cast iron, the body 21 is provided with a fixed screw hole and can be fixedly connected with a rotor end of a generator exciter, the insulator 24 is made of high-strength insulating resin, the positive electrode slip ring 22 and the negative electrode slip ring 23 are made of stainless steel materials, the insulator 24, the positive electrode slip ring 22 and the negative electrode slip ring 23 are all in tubular structures, the positive electrode slip ring 22 and the negative electrode slip ring 23 are arranged at intervals and fixedly sleeved on the insulator 24, the insulator 24 is fixedly connected with the body 21, and the positive electrode slip ring 22 and the negative electrode slip ring 23 are respectively provided with the rotor positive electrode lead wire column 25 and can be connected with a rotor positive electrode winding lead wire and a rotor negative electrode winding lead wire; the brush holder 13 is hollow structure, the carbon brush 3 inserts the cavity of brush holder 13, carbon brush 3 selects the preparation of morgan graphite, still set up the pressure spring in the brush holder 13, the one end fixed connection of pressure spring brush holder 13, the other end of this pressure spring is connected the terminal surface of carbon brush 3, carbon brush 3 is connected anodal sliding ring 22 or negative pole sliding ring 23, set up the line hole on the carbon brush 3, carbon brush lead-out wire 4 inserts in the line hole and through chucking screw fixed connection.
When the brushless exciter generator dynamically performs alternating current impedance test, the carbon brush assembly for the brushless exciter generator rotor dynamic test is installed according to the following steps: 1. fixedly connecting a fixed screw hole on a collecting ring body 21 of the carbon brush assembly with a rotor end of a generator exciter, and then respectively connecting a rotor positive winding lead and a rotor negative winding lead to a rotor positive lead post 25 on the positive slip ring 22 and a rotor negative slip ring 23 to realize electric connection; 2. the two carbon brush supports 1 are fixedly connected with screw holes on the stator shell of the exciter of the generator through the brush holder fixing support 12, carbon brushes 3 on the two carbon brush supports 1 are tightly attached to the outer surfaces of the positive slip ring 22 and the negative slip ring 23 respectively, and the test wire is electrically connected with the carbon brush outgoing wire 4. The test operation can then be started.
The carbon brush assembly for the brushless exciter generator rotor dynamic test has the following advantages:
1. the safety of personnel during dynamic test of the generator rotor is improved;
2. the problem of poor contact in the test is solved, and the condition of ignition of a contact surface is eliminated;
3. the accuracy and success rate of test results are improved;
4. and the fuel waste caused by test failure and reworking restarting is avoided.
The insulating board is made of a composite insulating board and has the characteristics of high pressure resistance, flame retardance, heat resistance, high temperature resistance and corrosion resistance; the brush holder fixing bracket is made of a steel plate with the thickness of 5mm, and is firm and high in strength; the collector ring body is made of cast iron and has the characteristics of firmness and high strength; the positive slip ring and the negative slip ring are made of stainless steel, have the characteristics of high temperature resistance and corrosion resistance, and are convenient for later maintenance; the insulator adopts high-strength insulating resin and has the characteristics of high pressure resistance, flame retardance, heat resistance, high temperature resistance and corrosion resistance; the carbon brush is made of Morgan graphite, has the characteristics of high temperature resistance, high melting point, easiness in conduction and self lubrication, and can prolong the service life of the slip ring to a certain extent.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the technical scope of the present utility model, so that any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present utility model still fall within the scope of the technical solutions of the present utility model.
Claims (10)
1. The utility model provides a brushless exciter generator rotor dynamic test's carbon brush subassembly, includes carbon brush support, collecting ring, carbon brush and carbon brush lead-out wire, its characterized in that, the carbon brush support includes interconnect's brush yoke and insulation board, the collecting ring includes anodal sliding ring, negative pole sliding ring and insulator, anodal sliding ring and negative pole sliding ring interval connection the insulator, the carbon brush is connected the brush yoke, the carbon brush is still connected anodal sliding ring or negative pole sliding ring, the carbon brush lead-out wire electricity is connected the carbon brush.
2. The carbon brush assembly according to claim 1, wherein the carbon brush holder is further provided with a brush holder fixing holder fixedly connected to the insulating plate, and the brush holder fixing holder is further fixedly connected to a screw hole in the stator housing of the exciter of the generator.
3. The carbon brush assembly according to claim 1 or 2, wherein the brush holder is fixedly connected to the insulating plate.
4. The carbon brush assembly according to claim 1 or 2, wherein the slip ring further comprises a body fixedly connected to the insulator, the body further being provided with a fixing screw hole fixedly connected to a rotor end of the generator exciter.
5. The carbon brush assembly according to claim 1 or 2, wherein the insulator, the positive slip ring and the negative slip ring are each of a tubular structure, and the positive slip ring and the negative slip ring are fixedly sleeved on the insulator.
6. The carbon brush assembly according to claim 1 or 2, wherein the positive slip ring and the negative slip ring are further provided with rotor positive and negative lead posts.
7. The carbon brush assembly according to claim 1 or 2, wherein the brush holder is of a hollow structure, and the carbon brush is inserted into a hollow portion of the brush holder.
8. The carbon brush assembly according to claim 1 or 2, wherein a wire hole is provided in the carbon brush, and the carbon brush outgoing wire is inserted into the wire hole and fixedly connected by a clamping screw.
9. The carbon brush assembly according to claim 1 or 2, wherein a pressure spring is provided in the brush holder, one end of the pressure spring is fixedly connected to the brush holder, and the other end of the pressure spring is connected to an end face of the carbon brush.
10. The carbon brush assembly according to claim 1 or 2, wherein the brush holder insulating plate is made of a composite insulating material, the positive slip ring and the negative slip ring are made of stainless steel materials, the insulator is made of high-strength insulating resin, and the carbon brush is made of a morgan graphite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223363229.0U CN219065553U (en) | 2022-12-14 | 2022-12-14 | Carbon brush assembly for dynamic test of brushless exciter generator rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223363229.0U CN219065553U (en) | 2022-12-14 | 2022-12-14 | Carbon brush assembly for dynamic test of brushless exciter generator rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219065553U true CN219065553U (en) | 2023-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223363229.0U Active CN219065553U (en) | 2022-12-14 | 2022-12-14 | Carbon brush assembly for dynamic test of brushless exciter generator rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219065553U (en) |
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2022
- 2022-12-14 CN CN202223363229.0U patent/CN219065553U/en active Active
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