A brush holder device for a generator based on hydraulic control

Abstract

The application provides a generator brush holder device based on hydraulic control, which comprises a brush holder execution part, the brush holder execution part comprises a brush box, a top rod and a working box body arranged from left to right, the two sides of the top rod are arranged in the brush box and the working box body respectively, one end of the top rod abuts against a right carbon brush, the top rod divides the inside of the working box body into a first working cavity and a second working cavity, a high-pressure oil cavity, a low-pressure oil cavity and an oil pump for driving work are arranged at the bottom of the working box body, and a plurality of oil pressure sensors for detecting oil pressure at different positions are arranged in the working box body. The application is ingenious in design, can greatly improve the sensitivity of the carbon brush, and thus reduces the probability of unstable work.

Description

Technical Field

[0001] This invention relates to the field of generator technology, and in particular to a generator brush holder based on hydraulic control. Background Technology

[0002] The generator slip ring assembly mainly consists of slip rings, brush holders, brush grips, and carbon brushes. As a crucial component of the generator excitation system, the slip ring assembly has consistently been a key focus and challenge in generator set maintenance, with a significantly higher frequency and number of defects compared to other equipment. Overheating and sparking of the generator slip rings are common faults during generator set operation. If not addressed promptly, these issues can lead to the burnout of the slip rings and carbon brushes, threatening the safe and stable operation of the unit. A significant cause of generator slip ring sparking is poor contact between the carbon brushes and slip rings, resulting in uneven current density distribution among the carbon brushes in contact with the slip rings, causing localized overheating and sparking.

[0003] Currently, generator slip ring devices use constant-pressure springs to make contact between the carbon brushes and the slip rings for current conduction. Existing technology has the following defects and shortcomings: 1) The constant-pressure spring has a small constant-force range, resulting in low carbon brush utilization. The constant-pressure spring used in generator brush holders typically has a constant-force range of 20mm-50mm. In actual use, the carbon brushes need to be replaced when the wear length reaches 1 / 2-2 / 3; 2) The constant-pressure spring has a slow dynamic response. For high-speed generator sets, when the slip ring swing is large (not greater than 0.5mm), some carbon brushes may not be able to contact the slip rings in time, leading to slip ring arcing; 3) The constant-pressure spring has a short service life. According to JB / T 2361-1992 constant-pressure brush holders, the spring force decay in the constant-force range should not exceed 2%. Due to the material properties of the constant-pressure spring, the rebound force decays quickly, generally requiring replacement in less than 2 years; 4) The constant-pressure spring generates significant operating noise. The friction and collision between the constant-pressure spring and the brush holder body produce noise. Summary of the Invention

[0004] This invention provides a generator brush holder based on hydraulic control, which solves the problems of low carbon brush length utilization, short service life, and high operating noise caused by the inability to dynamically adjust carbon brush pressure and response sensitivity.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a generator brush holder based on hydraulic control, including a brush holder actuator, the brush holder actuator including a brush box, a push rod and a working box arranged from left to right, the two sides of the push rod are respectively arranged in the brush box and the working box, one end of the push rod abuts against the right carbon brush, the push rod divides the inside of the working box to form a first working chamber and a second working chamber, the bottom of the working box is provided with a high-pressure oil chamber, a low-pressure oil chamber and an oil pump for driving the operation, and multiple oil pressure sensors for detecting oil pressure at different positions are provided in the working box.

[0006] In the preferred embodiment, an insulating pad is provided between the push rod and the carbon brush, and a right insulating handle is fixed to the outside of the working box.

[0007] In a preferred embodiment, one side of the first working chamber is connected to the high-pressure oil chamber via a first control valve, and the other side of the first working chamber is connected to the low-pressure oil chamber via a solenoid valve. An air filling chamber is provided on the outside of the first working chamber, and the second working chamber is connected to the low-pressure oil chamber via a second control valve.

[0008] In the preferred embodiment, a current sensor is provided on the brush box, and a displacement sensor is provided on the top rod.

[0009] In a preferred embodiment, the working box includes a shell and a sealing plate. A contact block and a push plate are respectively provided on both sides of the top rod. The contact block is located inside the brush box, and the push plate is located inside the shell. A limit assembly is connected to the outside of the shell by screws. The top rod passes through the limit assembly. Multiple adjusting pins are provided on the limit assembly along the circumference. The ends of the adjusting pins are provided with balls, which abut against the outside of the top rod.

[0010] In a preferred embodiment, the limiting component includes a sleeve and a mounting plate. The sleeve and the mounting plate are respectively provided with a plurality of first threaded holes and through holes along the circumference. The outer side of the housing is provided with a plurality of second threaded holes. Screws are inserted into the through holes and the second threaded holes, and adjusting pins are threadedly connected to the first threaded holes.

[0011] In a preferred embodiment, multiple adjusting pins are arranged axially on the sleeve, and a detection plate is detachably magnetically connected to the parallel adjusting pins; The adjustment pin has a protrusion on one side, and an annular conductive sheet is provided on the protrusion. An arc-shaped platform is provided in the middle of the annular conductive sheet. The detection plate includes multiple indicator lights set on the outside. Multiple countersunk holes are provided on one side of the detection plate. An arc groove is provided in the middle of the countersunk hole. The shape of the countersunk hole and the arc-shaped platform are matched. The arc groove and the arc-shaped platform are magnetically attracted. A first electrode and a second electrode are respectively provided on the outside of the arc groove. The annular conductive sheet is used to conduct electricity between the first electrode and the second electrode. Multiple battery compartments are provided on the other side of the detection plate. Button batteries are provided in the battery compartments. The corners of the detection plate are rounded.

[0012] In the preferred embodiment, the limiting component is provided with an adapter seat, and elastic plates are symmetrically provided on both sides of the adapter seat. Slide grooves are provided on both sides of the contact block, and the elastic plates are located in the slide grooves. The elastic plates are used to provide lateral support and limit the carbon brush.

[0013] In the preferred embodiment, the sleeve is provided with external threads, the adapter includes a first base plate and a cylinder, the cylinder and the external threads are threaded together, the first base plate is provided with symmetrical mounting platforms, the mounting platforms are provided with slots, the slots are provided with a third threaded hole, the elastic plate is inserted into the slots, the elastic plate is provided with a limiting hole, and the screw is inserted into the third threaded hole and the limiting hole.

[0014] In a preferred embodiment, the elastic plate includes a second base plate, with an inclined strip and a straight strip in the middle of the second base plate. The straight strip is located in the slot, and a limiting hole is provided on the straight strip. The sliding groove is inclined outward, and the inclined strip is inclined towards one side of the second base plate. The beneficial effects of this invention are as follows: By setting a hydraulic device at the rear of the push rod, timely and effective adjustments can be made based on the dynamic pressure of the slip ring on the front end of the carbon brush, ensuring stable and efficient contact between the carbon brush and the slip ring. Simultaneously, the setting of the limiting component ensures the overall accuracy of the push rod during high-load operation, alleviating the tangential force transmitted from the slip ring to the push rod through the carbon brush and brush holder, resulting in greater overall stability. Furthermore, the setting of the detection plate ensures accurate initial installation and good consistency, and allows for timely and efficient diagnosis during brush holder disassembly and maintenance. At the same time, the elastic plate can constrain the movement trajectory of the carbon brush. However, since the carbon brush increases in volume under current conduction, it is still necessary to adjust the length of the carbon brush. The elastic plate is squeezed along with the movement of the push rod, thus making way for the carbon brush and avoiding the problem of the carbon brush directly getting stuck in the brush holder. This invention is ingeniously designed and can effectively address the problem of generator power generation, offering good economic benefits. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the internal structure of the present invention; Figure 2 This is a schematic diagram of the application of the present invention in a slip ring; Figure 3 This is a schematic diagram of the overall structure of the present invention, state one; Figure 4 This is a schematic diagram of the overall structure of the present invention, state two; Figure 5 yes Figure 3 A top-down view; Figure 6 yes Figure 3 Front view diagram; Figure 7 yes Figure 3 A left-view diagram; Figure 8 yes Figure 3 Schematic diagram of the exploded structure, state one; Figure 9 yes Figure 3 Schematic diagram of the exploded structure, state two; Figure 10 yes Figure 3 A schematic diagram of the exploded structure of the limiting component; Figure 11 yes Figure 3 Schematic diagram of the detection plate structure, state one; Figure 12 yes Figure 3 Schematic diagram of the detection plate structure, state two; Figure 13 This is a schematic diagram of the adapter mounting structure of the present invention, state one; Figure 14 This is a schematic diagram of the adapter mounting structure of the present invention, state two; Figure 15 yes Figure 13 A schematic diagram of the adapter structure; Figure 16 yes Figure 13 A schematic diagram of the limiting component structure; Figure 17 This is a schematic diagram of the structure of the present invention without carbon brushes installed; Figure 18 yes Figure 17 A frontal view diagram; Figure 19 This is a schematic diagram of the push rod structure of the present invention; Figure 20 yes Figure 19 Rear view diagram; Figure 21 yes Figure 20 Sectional view along axis AA; Figure 22 This is a schematic diagram of the elastic plate structure of the present invention; Figure 23 This is a schematic diagram of the top rod mounting elastic plate structure of the present invention; Figure 24 yes Figure 23 A top-down view; Figure 25 yes Figure 23 A left-view diagram; Figure 26 yes Figure 25 BB-direction sectional view.

[0016] In the diagram: 1. Brush box; 2. Carbon brush; 3. Insulating pad; 4. Push rod; 401. Contact block; 402. Push plate; 403. Slide groove; 5. First working chamber; 6. Second working chamber; 7. First control valve; 8. Second control valve; 9. High-pressure oil chamber; 10. Air chamber; 11. Low-pressure oil chamber; 12. Oil pump; 13. Limiting assembly; 1301. Sleeve; 1302. Mounting plate; 1303. First threaded hole; 1304. Through hole; 1305. Adjusting pin; 1306. Protrusion; 1307. Arc stage; 1308. Annular conductive sheet; 1309. External thread; 1310. Ball bearing; 14. Oil pressure sensor; 15. Solenoid valve; 16. Current sensor; 17. Displacement sensor; 8. Brush 18. Grip actuator; 19. Slip ring; 20. Working box; 2001. Housing; 2002. Sealing plate; 2003. Second threaded hole; 21. Detection plate; 2101. Countersunk hole; 2102. Arc groove; 2103. First electrode; 2104. Second electrode; 2105. Indicator light; 2106. Battery compartment; 2107. Button battery; 2108. Rounded corner; 22. Adapter seat; 2201. First base plate; 2202. Cylinder; 2203. Mounting platform; 2204. Third threaded hole; 2205. Slot; 23. Elastic plate; 2301. Second base plate; 2302. Diagonal bar; 2303. Straight bar; 2304. Limiting hole; 24. Screw; 25. Insulated handle. Detailed Implementation

[0017] like Figure 1-7 In this invention, a generator brush holder based on hydraulic control includes a brush holder actuator 18. The brush holder actuator 18 includes a brush box 1, a push rod 4, and a working housing 20 arranged from left to right. The two sides of the push rod 4 are respectively disposed in the brush box 1 and the working housing 20. One end of the push rod 4 abuts against the right carbon brush 2. The push rod 4 divides the interior of the working housing 20 to form a first working chamber 5 and a second working chamber 6. The bottom of the working housing 20 is provided with a high-pressure oil chamber 9, a low-pressure oil chamber 11, and an oil pump 12 for driving the operation. The working housing 20 is provided with multiple oil pressure sensors 14 for detecting oil pressure at different positions. This structure allows hydraulic oil from the low-pressure oil chamber 11 to be pumped into the high-pressure oil chamber 9 via the oil pump 12, achieving oil circulation. Simultaneously, the first working chamber 5 and the second working chamber 6 adjust the position and direction of the push rod 4 through the oil, thereby changing the appropriate position of the carbon brush 2 in the brush box 1. The overall response is sensitive and efficient. The oil pressure sensor 14 can monitor the oil pressure in the working chamber and maintain the pressure in the oil chamber within the required and safe range by adjusting the first control valve 7 and the second control valve 8.

[0018] In the preferred embodiment, an insulating pad 3 is provided between the push rod 4 and the carbon brush 2, and a right insulating handle 25 is fixed to the outside of the working housing 20. The insulating pad 3 serves to insulate the carbon brush 2 from the hydraulic operating part of the brush holder during operation and to isolate some heat conduction. The insulating handle 25 serves to enable the energized insertion and removal of the carbon brush, facilitating the handling of defects during unit operation.

[0019] In the preferred embodiment, one side of the first working chamber 5 is connected to the high-pressure oil chamber 9 via the first control valve 7, and the other side of the first working chamber 5 is connected to the low-pressure oil chamber 11 via the solenoid valve 15. An inflation chamber 10 is provided on the outer side of the first working chamber 5, and the second working chamber 6 is connected to the low-pressure oil chamber 11 via the second control valve 8. This structure allows for adjustment of the position and direction of the push rod 4 as needed, providing convenient and efficient operation with precise control.

[0020] In the preferred embodiment, a current sensor 16 is provided on the brush box 1, and a displacement sensor 17 is provided on the push rod 4. The displacement sensor 14 can measure the wear length of the carbon brush, realizing the online monitoring function of the carbon brush length, and the current sensor 16 measures the brush braid current of the carbon brush, realizing the current of each carbon brush 2 during operation, and monitoring the carbon brush operating status in real time.

[0021] like Figure 8-10 In a preferred embodiment, the working housing 20 includes a shell 2001 and a sealing plate 2002. Contact blocks 401 and push plates 402 are respectively provided on both sides of the push rod 4. The contact blocks 401 are located inside the brush box 1, and the push plates 402 are located inside the shell 2001. A limiting assembly 13 is connected to the outside of the shell 2001 via screws 24. The push rod 4 passes through the limiting assembly 13. Multiple adjusting pins 1305 are provided circumferentially on the limiting assembly 13. The ends of the adjusting pins 1305 are provided with ball bearings 1310, which abut against the outside of the push rod 4. This structure allows the push plate 402 to be driven by the working housing 20, thereby changing its position and direction, and thus adjusting the position and direction of the contact blocks 401. The limiting assembly 13, through the adjusting pins 1305, can precisely adjust the position of the push rod 4, while also bearing and mitigating the tangential force transmitted from the slip ring 19 to the push rod 4 through the carbon brush 2 and brush box 1, resulting in greater overall stability.

[0022] In a preferred embodiment, the limiting assembly 13 includes a sleeve 1301 and a mounting plate 1302. The sleeve 1301 and mounting plate 1302 are respectively provided with multiple first threaded holes 1303 and through holes 1304 along the circumference. The outer surface of the housing 2001 is provided with multiple second threaded holes 2003. Screws 24 pass through the through holes 1304 and the second threaded holes 2003. Adjusting pins 1305 are threadedly connected to the first threaded holes 1303. This structure ensures that the limiting assembly 13 is stably and conveniently fixed, and can be adjusted flexibly and quickly to accommodate the use of push rods 4 of different diameters.

[0023] like Figure 11-12 In the preferred embodiment, multiple adjusting pins 1305 are arranged axially on the sleeve 1301, and a detection plate 21 is detachably magnetically connected to the parallel adjusting pins 1305. The adjusting pin 1305 has a protrusion 1306 on one side, and an annular conductive sheet 1308 on the protrusion 1306. The annular conductive sheet 1308 has an arc stage 1307 in the middle. The detection plate 21 includes multiple indicator lights 2105 disposed on the outside. The detection plate 21 has multiple countersunk holes 2101 on one side, and an arc groove 2102 in the middle of the countersunk hole 2101. The shape of the countersunk hole 2101 matches the arc stage 1307. The arc groove 2102 and the arc stage 1307 are magnetically attracted. The outer side of the arc groove 2102 is provided with a first electrode 2103 and a second electrode 2104 respectively. The annular conductive sheet 1308 is used to conduct the first electrode 2103 and the second electrode 2104. The other side of the detection plate 21 has multiple battery compartments 2106. The battery compartments 2106 are provided with button batteries 2107. The corners of the detection plate 21 are provided with rounded corners 2108. This structure ensures accurate initial installation and good consistency of the detection plate. It also allows for timely and efficient diagnosis during brush holder disassembly and maintenance. Only when the heights of the multiple axially set adjustment pins are consistent can the first electrode 2103 and the second electrode 2104 be connected respectively, and then the indicator lights 2105 at their respective positions will light up. The overall operation is intuitive, efficient, and highly accurate. The magnetic attraction between the arc groove 2102 and the arc platform 1307 ensures fast overall detection speed and good results.

[0024] like Figure 13-18 In the preferred embodiment, the limiting component 13 is provided with an adapter 22, and elastic plates 23 are symmetrically provided on both sides of the adapter 22. The contact block 401 is provided with a sliding groove 403 on both sides, and the elastic plate 23 is located in the sliding groove 403. The elastic plate 23 is used to provide lateral support and limit the carbon brush 2.

[0025] In a preferred embodiment, the sleeve 1301 is provided with an external thread 1309, the adapter 22 includes a first base plate 2201 and a cylinder 2202, the cylinder 2202 and the external thread 1309 are threadedly connected, the first base plate 2201 is symmetrically provided with a mounting platform 2203, the mounting platform 2203 is provided with a slot 2205, the slot 2205 is provided with a third threaded hole 2204, the elastic plate 23 is inserted into the slot 2205, the elastic plate 23 is provided with a limiting hole 2304, and the screw 24 is passed through the third threaded hole 2204 and the limiting hole 2304. This structure ensures that the adapter 22 remains relatively stable and does not move with the push rod. It also facilitates the installation of the elastic plate 23. The width of the elastic plate 23 is smaller than the width of the slide groove 403, thus maintaining a relatively vertical position initially. The elastic plate 23 and adapter 22 are easy to install and remove, facilitating future maintenance and adjustment. When the elasticity of the elastic plate 23 decreases, it can be quickly replaced. Ideally, the carbon brush 2 is directly aligned with the center of the slip ring 19. However, in real-world scenarios, there will always be a slight angle. Therefore, the accuracy of the carbon brush's position directly affects its lifespan and the stability of the brush holder.

[0026] like Figure 19-26 In the preferred embodiment, the elastic plate 23 includes a second base plate 2301. The second base plate 2301 has a diagonal strip 2302 and a straight strip 2303 in the middle. The straight strip 2303 is located in the slot 2205. The limiting hole 2304 is provided on the straight strip 2303. The sliding groove 403 is inclined to the outside, and the diagonal strip 2302 is inclined to one side of the second base plate 2301. This structure allows for an initial gap between the carbon brush 2 and the brush holder 1, providing some leeway for the carbon brush to increase in size and become stuck after current is applied. The elastic plate 23 initially limits the carbon brush 2 from the side, ensuring stable operation and preventing unrestricted positional changes due to the tangential force of the slip ring 19. Since the slide groove 403 is inclined, when the push rod 4 pushes the carbon brush 2 forward to change its position, the elastic plate 23 at the front is squeezed, gradually reducing the pressure on the surface of the carbon brush 2 and providing a channel and space for the carbon brush 2 to increase in size. The overall design is ingenious and ensures that the carbon brush 2 works stably and efficiently within the brush holder 1.

[0027] Working principle: Because the generator slip ring 19 rotates synchronously with the generator shaft, and its manufacturing process results in a certain degree of ellipticity, and it is not perfectly concentric with the shaft during installation, the slip ring 19 exhibits radial runout during rotation. During the excitation current conduction process, the generator carbon brush 2 experiences radial force and tangential friction from the slip ring 19, causing it to reciprocate radially within the brush holder 1, while simultaneously wearing down and shortening. To maintain good contact between the carbon brush 2 and the slip ring 19, and to keep it within a constant pressure range, this invention utilizes hydraulic control principles to maintain a relatively constant pressure difference between the second working chamber 6 and the first working chamber 5 acting on the push rod during the reciprocating motion of the carbon brush 2.

[0028] According to Pascal's theorem, P = F / S, Then F1 = P2 × S2 - P1 × S1 = (P2 - P1) × S1 + P2 × (S2 - S1) In the above formula: F1 is the pressure difference between the hydraulic oil in the second working chamber 6 and the first working chamber 5 acting on the brush gripping rod; S1 is the area of ​​the first working chamber 5 acting on the brush grip rod; S2 is the area of ​​the second working chamber 6 acting on the brush grip rod; P1 is the pressure inside the first working chamber 5; P2 is the pressure inside the second working chamber 6.

[0029] F0 is the rated radial thrust of the slip ring 19 facing the carbon brush. This force is generally within a reasonable range in the design and is approximately a constant. When the collector ring 19 is in the equilibrium position F0 = F1 Let P1 = P2, Then F0 = P2 × (S2 - S1) Then P2 = F0 / (S2 - S1) The pressure setting value of the second working chamber 6 can be calculated using this formula.

[0030] When the force exerted by the slip ring 19 on the carbon brush is greater than F0, that is, when the carbon brush 2 is compressed by the slip ring 19, the brush holder push rod 4 is pushed to move in the first working chamber 5 through the insulating pad 3. Since the first working chamber 5 and the second working chamber 6 are filled with hydraulic oil, the hydraulic oil in the second working chamber 6 enters the first working chamber 5 through the damping hole of the first control valve 7. By adjusting the first control valve 7 and the second control valve 8, P1 and P2 are adjusted so that the high-pressure oil enters the first working chamber 5 through the damping valve. At this time, P1>P2, so that the pressure difference between the hydraulic oil in the second working chamber 6 and the first working chamber 5 acting on the push rod is quickly kept relatively constant. The excess energy is stored by compressing the nitrogen in the air chamber 10. The air chamber 10 is provided with an oil storage chamber, and a damping valve is provided between the oil storage chamber and the working box 20.

[0031] When the pressure exerted on the carbon brush by the slip ring 19 is less than F0, or when the carbon brush 2 is worn and shortened, the presence of compressed air in the air chamber 10 causes the pressure in the oil reservoir to be greater than the oil pressure in the second working chamber 6. By adjusting the second control valve 8, the hydraulic oil in the oil reservoir enters the second working chamber 6 through the damping valve orifice. Opening the solenoid valve 15 allows the hydraulic oil in the first working chamber 5 to enter the low-pressure oil chamber through the solenoid valve 15 orifice. At this time, the oil pressure in the second working chamber 6 is greater than that in the first working chamber 5, which pushes the first control valve 7 and the brush gripper rod 4 to move in opposite directions. By adjusting the first control valve 7 and the second control valve 8, and adjusting P1 and P2, the pressure difference between the second working chamber 6 and the first working chamber 5 acting on the brush gripper rod 4 is kept relatively constant.

[0032] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A generator brush holder based on hydraulic control, characterized in that: The brush gripping actuator (18) includes a brush box (1), a push rod (4) and a working box (20) arranged from left to right. The two sides of the push rod (4) are respectively arranged in the brush box (1) and the working box (20). One end of the push rod (4) abuts against a carbon brush (2). The push rod (4) divides the interior of the working box (20) into a first working chamber (5) and a second working chamber (6). The bottom of the working box (20) is provided with a high-pressure oil chamber (9), a low-pressure oil chamber (11) and an oil pump (12) for driving the operation. The working box (20) is provided with multiple oil pressure sensors (14) for detecting oil pressure at different positions. The first working chamber (5) is connected to the high-pressure oil chamber (9) on one side through the first control valve (7), and to the low-pressure oil chamber (11) on the other side through the solenoid valve (15). The first working chamber (5) is provided with an air filling chamber (10) on the outside. The second working chamber (6) is connected to the low-pressure oil chamber (11) through the second control valve (8). The working box (20) includes a shell (2001) and a sealing plate (2002). The top rod (4) is provided with a contact block (401) and a push plate (402) on both sides. The contact block (401) is located inside the brush box (1), and the push plate (402) is located inside the shell (2001). The outside of the shell (2001) is connected to a limit assembly (13) by screws (24). The top rod (4) passes through the limit assembly (13). The limit assembly (13) is provided with multiple adjusting pins (1305) along the circumferential direction. The end of the adjusting pin (1305) is provided with a ball (1310). The ball (1310) abuts against the outside of the top rod (4).

2. The generator brush holder based on hydraulic control according to claim 1, characterized in that: An insulating pad (3) is provided between the top rod (4) and the carbon brush (2), and an insulating handle (25) is fixed on the outside of the working box (20).

3. The generator brush holder based on hydraulic control according to claim 1, characterized in that: A current sensor (16) is provided on the brush box (1), and a displacement sensor (17) is provided on the push rod (4).

4. The generator brush holder based on hydraulic control according to claim 1, characterized in that: The limiting component (13) includes a sleeve (1301) and a mounting plate (1302). The sleeve (1301) and the mounting plate (1302) are respectively provided with a plurality of first threaded holes (1303) and through holes (1304) along the circumferential direction. The outer side of the housing (2001) is provided with a plurality of second threaded holes (2003). Screws (24) are inserted into the through holes (1304) and the second threaded holes (2003). Adjusting pins (1305) are threadedly connected to the first threaded holes (1303).

5. The generator brush holder based on hydraulic control according to claim 4, characterized in that: Multiple adjusting pins (1305) are arranged axially on the sleeve (1301), and a detection plate (21) is detachably magnetically connected to the parallel adjusting pins (1305). The adjusting pin (1305) has a protrusion (1306) on one side, and an annular conductive sheet (1308) is provided on the protrusion (1306). An arc-shaped platform (1307) is provided in the middle of the annular conductive sheet (1308). The detection plate (21) includes multiple indicator lights (2105) set on the outside. The detection plate (21) has multiple countersunk holes (2101) on one side, and an arc-shaped groove (2102) is provided in the middle of the countersunk hole (2101). The shape of the countersunk hole (2101) matches the arc-shaped platform (1307). The arc groove (2102) and the circular arc platform (1307) are magnetically attracted. The outer side of the arc groove (2102) is provided with a first electrode (2103) and a second electrode (2104). The annular conductive sheet (1308) is used to conduct the first electrode (2103) and the second electrode (2104). The other side of the detection plate (21) is provided with multiple battery compartments (2106). The battery compartments (2106) are provided with button batteries (2107). The corners of the detection plate (21) are provided with rounded corners (2108).

6. The generator brush holder based on hydraulic control according to claim 1, characterized in that: The limiting component (13) is provided with an adapter (22), and elastic plates (23) are symmetrically provided on both sides of the adapter (22). The contact block (401) is provided with a sliding groove (403) on both sides. The elastic plate (23) is located in the sliding groove (403). The elastic plate (23) is used to provide lateral support and limit the carbon brush (2).

7. The generator brush holder based on hydraulic control according to claim 6, characterized in that: The sleeve (1301) is provided with an external thread (1309). The adapter (22) includes a first base plate (2201) and a cylinder (2202). The cylinder (2202) and the external thread (1309) are threaded together. The first base plate (2201) is symmetrically provided with a mounting platform (2203). The mounting platform (2203) is provided with a slot (2205). A third threaded hole (2204) is provided through the slot (2205). An elastic plate (23) is inserted into the slot (2205). A limiting hole (2304) is provided on the elastic plate (23). A screw (24) is inserted into the third threaded hole (2204) and the limiting hole (2304).

8. The generator brush holder based on hydraulic control according to claim 7, characterized in that: The elastic plate (23) includes a second base plate (2301). The second base plate (2301) has a diagonal strip (2302) and a straight strip (2303) in the middle. The straight strip (2303) is located in the slot (2205). The limiting hole (2304) is set on the straight strip (2303). The sliding groove (403) is inclined to the outside. The diagonal strip (2302) is inclined to one side of the second base plate (2301).

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