CN212649248U - Novel generator brush yoke and brush holder device - Google Patents
Novel generator brush yoke and brush holder device Download PDFInfo
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- CN212649248U CN212649248U CN202021417372.1U CN202021417372U CN212649248U CN 212649248 U CN212649248 U CN 212649248U CN 202021417372 U CN202021417372 U CN 202021417372U CN 212649248 U CN212649248 U CN 212649248U
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Abstract
The utility model belongs to the technical field of generator structural design, concretely relates to novel generator brush yoke and brush holder device, brush box upper end has a brush holder to be used for taking the brush box, and the brush holder lower extreme has a baffle, respectively has a nut to be connected fixedly with the brush holder about the baffle, by a pressure spring stone roller, has fixed plate and round pin piece nut to let rolling bearing be connected with the brush in the middle of pressure spring stone roller and the brush holder, the drive part effect of pressure spring stone roller drive the brush holder and rotate. The brush box is characterized in that four cuboid clamping grooves are formed in the bottom of the brush box, a retaining spring is arranged in each clamping groove, a brush pressing plate is connected with the retaining springs below the retaining springs and used for pressing the brush pressing plate to extrude the retaining springs to fix the electric brush when the brush holder is taken out of the brush holder. The device reduces the probability of abnormal contact between the brush holder or the carbon brush and the slip ring, ensures the stability of safe operation of the generator, has great promotion effect, and simultaneously ensures the economic benefit of a company.
Description
Technical Field
The utility model belongs to the technical field of generator structural design, concretely relates to novel generator brush yoke and brush holder device.
Background
With the continuous increase of the capacity of the generator, the requirement on an excitation system is higher and higher. The traditional direct current exciter excitation cannot be used due to the spark problem under the large current, and a three-machine excitation system is increasingly limited due to the problems of complex system, unit shafting stability and the like; the self-shunt excitation static excitation system is widely applied due to the characteristics of simple wiring, high reliability, low engineering cost, high regulation response speed and good de-excitation effect. The brush holder also plays an irreplaceable role as an integral part in the self-shunt excitation static excitation system.
The brush holder of the turbonator generally comprises an underframe, an insulating support, an electrical connector, a brush holder, a sound-proof cover and the like. The chassis is a base of the brush holder, and the insulating support, the electric connecting piece, the brush holder and the like are directly or indirectly fixed on the chassis. The underframe is formed by welding high-quality steel plates, is placed on the base seat plate and is fixed on the base through the base screw. The insulating support is composed of a plurality of insulating plates or an insulating brush rod and a bracket, is used as a support for the brush holder and the electric connecting piece, and insulates the components from the underframe. The electrical connector is generally composed of parts such as a conductive concave block, an arc-shaped conductive plate, a conductive block, a lead wire and the like, which are all made of copper materials and are connected with each other to form a path of exciting current. The brush holder plays a role of holding the electric brush and can be divided into a holding multi-hole combined structure and a holding single-hole unit structure. The multi-hole combined brush holder consists of a brush box, an electric brush, a constant-pressure spring (namely a rolled spring, the electric brush is kept in contact with a collecting ring under the action of radial constant pressure), a conductive wedge block, an insulating handle and the like, and is assembled on the conductive concave block in a clamping mode, so that the brush holder and the conductive concave block can be separated to replace the electric brush in operation, safety and reliability are realized, and the maintenance and operation are convenient.
The existing brush holder and brush holder have the following defects:
(1) the original brush holder elastic steel plate can not effectively buckle the carbon brush, if the brush holder is installed in the running process of the generator, sparks can be generated, the carbon brush is damaged, and the equipment safety and the personal safety are seriously threatened. If the spark is too large, the risk of a short circuit between the positive and negative electrodes is not excluded.
(2) The steel plate at the bottom of the original brush holder is too thin and is easy to deform. If such a situation occurs during the operation of the generator, the brush holder cannot be smoothly installed. In order to prevent other brush holder currents from being too large, the machine is stopped except for load reduction, and accordingly, the machine is not paid.
(3) The original brush holder spring is too high in pressure, so that the current is too high, the carbon brush is abraded too fast, and the spring is fixed in a rivet mode, so that the spring is inconvenient to replace when damaged, and only a new brush holder can be replaced. According to the current running wear rate, the wear-resistant steel pipe needs to be replaced once in 3 or 4 months on average.
(4) The original brush holder device frequently generates brush holder defects in the debugging stage of a machine set, and the phenomena of difficult equipment installation and overheating are generated. Wherein the mounting difficulty is manifested as difficulty in mounting the brush box to the brush holder, due to: firstly, the position of a locking shaft on a middle shaft of the brush box is not proper, secondly, a baffle plate on a mounting part of the brush box is too thin, and thirdly, the pressure of a constant pressure spring in the brush box is overlarge;
(5) the holding pressure plate can not realize the original function, namely the end face of the electric brush can not be blocked when the brush box is not installed, so that the electric brush can be popped out of the brush box under the action of the constant-pressure spring;
(6) the shaft in the brush box is made of carbon steel and is not electroplated, and the shaft is easy to rust after being used for a certain time;
(7) the braid fixing screw is a half-round head screw, and a groove on the half-round head of the screw is opened after the braid fixing screw is used for a period of time, so that the half-round head screw cannot be screwed down or loosened;
(8) the whole brush holder is not plated with silver, and the reverse electricity performance is poor.
Although the brush yoke of the generator has a simple structure and low manufacturing cost, due to the special positions and functions of the brush yoke, faults such as sparking, carbon brush ring fire and the like are easily caused once the faults occur, and the machine tripping can be caused when the conditions are serious, so that the transmission of electric energy of a power station is influenced, the economic benefit is reduced, and the safe and stable operation of the power station is threatened.
SUMMERY OF THE UTILITY MODEL
Not enough more than, the utility model discloses a main objective provides a novel generator brush yoke and brush holder device, reduces brush holder or carbon brush and the unusual probability of sliding ring contact, guarantees that generator safe operation's stability has very big promotion effect, has also guaranteed the economic benefits of company simultaneously.
The technical scheme of the utility model as follows:
a novel generator brush carrier and brush holder device comprises a brush box, a constant pressure spring, a brush holder, a deflector rod, a brush pressing plate, a retaining spring, a pressure spring, a guide frame, a fixed plate and a pressure spring;
the brush box is fixed with the guide frame through four bolts in the middle, the bottom of the brush box is divided into four parts on average, four cuboid clamping grooves are formed for installing electric brushes, and a constant-pressure spring is arranged in the middle of each cuboid clamping groove;
the brush box is characterized in that a brush holder is arranged at the upper end of the brush box and used for taking and placing the brush box, a baffle is arranged at the lower end of the brush holder, a nut is arranged on each of the left and the right of the baffle and connected and fixed with the brush holder, a pressure spring weight is arranged at the upper end of the back of the brush box, a fixing plate and a pin nut are arranged between the pressure spring weight and the brush holder to enable a rotating bearing to be connected with a brush, and a driving part of the pressure spring weight is used for driving the brush holder to.
The brush box is characterized in that four cuboid clamping grooves are formed in the bottom of the brush box, a retaining spring is arranged in each clamping groove, a brush pressing plate is connected with the retaining springs below the retaining springs and used for pressing the brush pressing plate to extrude the retaining springs to fix the electric brush when the brush holder is taken out of the brush holder.
A constant-voltage spring is arranged in the middle of each cuboid clamping groove of the brush box and used for pressing the electric brush and enabling one end of the electric brush to be in full contact with a collecting ring connected with a generator rotor so as to guarantee normal transmission of exciting current, and a lead-out wire is arranged at the other end of the electric brush and fixed by a nut and connected with the brush box.
A small shaft is connected below the pressure spring weight, the lower end of the small shaft is connected with a shifting lever in a cross shape, and the shifting lever rotates along with the brush holder through the small shaft.
The brush holder drives the driving lever to rotate along with the small shaft when rotating anticlockwise, and the I part of the driving lever compresses the brush pressing plate to extrude the retaining spring so as to fix the electric brush and keep the electric brush in the brush box.
When the brush holder rotates clockwise, the shifting lever is driven to rotate along with the small shaft, and the part of the shifting lever in the 'crossing' is fastened with the buckle in the brush holder to fix the brush box.
The cuboid clamping groove has the following dimensions: 25.4 x 38.1 x 60 mm.
The brush box is of a cuboid structure.
The beneficial effects of the utility model reside in that:
(1) the original brush holder base plate is too thin, has weak strength and is easy to deform after being pressed; the novel brush holder thickens the bottom plate of the brush holder, improves the structure, improves the strength, prevents the bottom plate from deforming under stress, and ensures the smooth operation of the brush holder;
(2) the original coil steel constant-pressure spring of the brush holder is replaced by a Japanese imported spring with better quality, the spring has better flexibility and lasting elasticity, the fixing mode of the spring is changed (the riveting is changed into the buckling connection), the whole brush holder is prevented from being replaced due to the breakage of the spring, the disassembly and the assembly are convenient, and the production cost is saved;
(3) the retaining pressure plate for blocking the electric brush is replaced by a retaining spring, and the original retaining pressure plate can deform under the action of stress and cannot well fix the carbon brush; after the retaining spring is replaced, the carbon brush can be compressed, so that the carbon brush is locked more stably, the phenomenon that the carbon brush is clamped and not tightly brushed and held during installation is avoided, and the safety during installation is ensured.
(4) Because the novel reinforced carbon brush with increased hardness is used, the replacement period of the original carbon brush is prolonged from 3 months to one year, the material is saved, and the production cost is reduced;
(5) the compression spring structure is used for replacing the original buckle plate structure, the stability of the equipment is improved, meanwhile, the safety of personnel during operation is guaranteed, and the stable operation of the unit is guaranteed.
Drawings
FIG. 1 is a schematic view of the general structure of a brush holder according to the present invention;
FIG. 2 is a left side view of the brush holder;
fig. 3 is a schematic structural view of a brush holder in front view.
In the figure: 1. a brush box; 2. a constant pressure spring; 3. a baffle plate; 4. a brush holder; 5. a deflector rod; 6. pressing a brushing plate; 7. a pressure spring; 8. a small shaft; 9. a retention spring; 10. a guide frame; 11. a pin piece; 12. and (7) fixing the plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-3, a novel generator brush holder and brush holder device, brush box 1 is fixed with guide frame 10 through four middle bolts, brush box 1 is a cuboid structure, the bottom of brush box 1 is divided into four parts on average, there are four cuboid slots of 25.4 38.1 60mm for installing brushes, there is a constant pressure spring 2 in the middle of each cuboid slot for compressing the brushes and making the one end of the brushes fully contact with the collector ring connected with the generator rotor to ensure the normal transmission of exciting current, there is a lead-out wire at the other end of the brushes, and the lead-out wire is fixed with brush box 1 by nuts.
The brush box comprises a brush holder and is characterized in that four cuboid clamping grooves are formed in the bottom of the brush box 1, a retaining spring 9 is arranged in each clamping groove, a brush pressing plate 6 is connected with the retaining springs 9 below the retaining springs 9, and the brush pressing plate 6 extrudes the retaining springs 9 to fix a brush when the brush holder is taken out of the brush holder, so that the brush is prevented from falling off and damaging equipment.
The brush box comprises a brush holder 4 arranged at the upper end of the brush box 1 and used for taking and placing the brush box 1, a baffle plate 3 arranged at the lower end of the brush holder, a nut arranged on each of the left and right sides of the baffle plate 3 and fixedly connected with the brush holder 4, a pressure spring weight 7 arranged at the upper end of the back of the brush box, a fixing plate 12 and a pin piece 11 nut arranged between the pressure spring weight 7 and the brush holder and used for connecting a rotating bearing with a brush, and a driving part of the pressure spring weight 7 is used for driving the brush holder 4 to rotate.
A small shaft 8 is connected below the pressure spring weight 7, the lower end of the small shaft is connected with a shift lever 5 in a cross shape, the shift lever 5 rotates along with the brush holder 4 through the small shaft 8, the shift lever 5 is driven to rotate along with the small shaft 8 when the brush holder 4 rotates anticlockwise, the cross part in the cross shape of the shift lever 5 compresses the brush pressing plate 6 to extrude the retaining spring 9 so as to fix the electric brush, and the electric brush is retained in the brush box; when the brush holder 4 rotates clockwise, the shift lever 5 is driven to rotate along with the small shaft 8, and the part of the shift lever 5 ' in the ' notch ' is fastened with the buckle in the brush holder to fix the brush box.
During operation, install the brush in the brush draw-in groove on brush box 1 earlier, connect the brush on brush box 1 with brush box 1, portable brush holder 4 is installed brush box 1 on the brush yoke, clockwise rotation brush holder 4 drives pressure spring stone roller 7 and connects and drive staff 8 clockwise rotation, staff 8 tip driving lever 5 clockwise rotation release pressure brush board 6 keeps spring 9 to withdraw, thereby the brush impels forward under constant voltage spring 2's pressure effect and makes abundant contact between brush and the collecting ring, constantly rub between brush and the collecting ring, the brush can shorten gradually, observe brush length through daily patrolling and examining, and regularly change the brush.
Claims (8)
1. A novel generator brush carrier and brush holder device comprises a brush box, a constant pressure spring, a brush holder, a deflector rod, a brush pressing plate, a retaining spring, a pressure spring, a guide frame, a fixed plate and a pressure spring; the method is characterized in that:
the brush box is fixed with the guide frame through four bolts in the middle, the bottom of the brush box is divided into four parts on average, four cuboid clamping grooves are formed for installing electric brushes, and a constant-pressure spring is arranged in the middle of each cuboid clamping groove;
the brush box is characterized in that a brush holder is arranged at the upper end of the brush box and used for taking and placing the brush box (1), a baffle is arranged at the lower end of the brush holder, a nut is arranged on each of the left and the right of each baffle and connected and fixed with the brush holder, a pressure spring weight is arranged at the upper end of the back of the brush box, a fixing plate and a pin nut are arranged between the pressure spring weight and the brush holder to enable a rotating bearing to be connected with a brush, and a driving part of the pressure spring weight is used for driving the brush holder to.
2. The novel generator brush carrier and brush holder device as claimed in claim 1, characterized in that: the brush box is characterized in that four cuboid clamping grooves are formed in the bottom of the brush box, a retaining spring is arranged in each clamping groove, a brush pressing plate is connected with the retaining springs below the retaining springs and used for pressing the brush pressing plate to extrude the retaining springs to fix the electric brush when the brush holder is taken out of the brush holder.
3. The novel generator brush carrier and brush holder device as claimed in claim 1, characterized in that: a constant-voltage spring is arranged in the middle of each cuboid clamping groove of the brush box and used for pressing the electric brush and enabling one end of the electric brush to be in full contact with a collecting ring connected with a generator rotor so as to guarantee normal transmission of exciting current, and a lead-out wire is arranged at the other end of the electric brush and fixed by a nut and connected with the brush box.
4. The novel generator brush carrier and brush holder device as claimed in claim 1, characterized in that: a small shaft is connected below the pressure spring weight, the lower end of the small shaft is connected with a shifting lever in a cross shape, and the shifting lever rotates along with the brush holder through the small shaft.
5. The novel generator brush carrier and brush holder device as claimed in claim 4, characterized in that: the brush holder drives the driving lever to rotate along with the small shaft when rotating anticlockwise, and the I part of the driving lever compresses the brush pressing plate to extrude the retaining spring so as to fix the electric brush and keep the electric brush in the brush box.
6. The novel generator brush carrier and brush holder device as claimed in claim 1, characterized in that: when the brush holder rotates clockwise, the shifting lever is driven to rotate along with the small shaft, and the part of the shifting lever in the 'crossing' is fastened with the buckle in the brush holder to fix the brush box.
7. A novel generator brush holder and brush holder device as claimed in any one of claims 1-6, wherein: the cuboid clamping groove has the following dimensions: 25.4 x 38.1 x 60 mm.
8. A novel generator brush holder and brush holder device as claimed in any one of claims 1-6, wherein: the brush box is of a cuboid structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021417372.1U CN212649248U (en) | 2020-07-17 | 2020-07-17 | Novel generator brush yoke and brush holder device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021417372.1U CN212649248U (en) | 2020-07-17 | 2020-07-17 | Novel generator brush yoke and brush holder device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212649248U true CN212649248U (en) | 2021-03-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021417372.1U Active CN212649248U (en) | 2020-07-17 | 2020-07-17 | Novel generator brush yoke and brush holder device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212649248U (en) |
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2020
- 2020-07-17 CN CN202021417372.1U patent/CN212649248U/en active Active
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