Generator carbon brush wear detection device

Abstract

The utility model discloses a generator carbon brush abrasion detection device, including motor shell, commutator and carbon brush body, the inside symmetry of motor shell is provided with two sets of limit shell, and the other end of two sets of limit shell extends to the outside of motor shell, and the inside of two sets of limit shell is provided with the mounting piece, and the carbon brush body swing joint is in the inside of mounting piece, and the inside of mounting piece still swing joint has first spring spare. The utility model is through the connection belt linkage carbon brush displacement, and when the wear exceeds the limit, the connection belt drives the winding mechanism to automatically touch the travel switch alarm, avoids the manual inspection lag, guarantees the safe operation of equipment, and the connection belt scale provides visible quantitative wear data, and the torsional spring of winding mechanism self -adaptation tension ensures that the connection belt is always straight, avoids the false triggering, and the roller design reduces the friction, and the double protection monitoring accuracy has solved the problem that the generator carbon brush abrasion state is difficult to real -time, effective, non -stop detection in the prior art.

Description

Technical Field

[0001] This utility model relates to the technical field of generator testing devices, and in particular to a generator carbon brush wear testing device. Background Technology

[0002] Generators are the core equipment in power systems, responsible for converting mechanical energy into electrical energy. Among the many types of generators (especially synchronous generators and AC exciters), carbon brushes are a critical and easily worn component. Carbon brushes are usually made of graphite or graphite composite materials containing metal. They are tightly attached to the slip rings or commutator surface of the generator rotor by spring pressure, and undertake the important task of conducting large currents (excitation current or main current) to the rotating parts.

[0003] Carbon brushes inevitably wear down during long-term operation due to factors such as friction, current, and temperature rise. Currently, monitoring the wear condition of generator carbon brushes mainly relies on regular manual inspections and visual checks by maintenance personnel or measuring the remaining length after shutdown. This method has significant drawbacks: it is difficult to grasp the degree of carbon brush wear in real time and accurately; the interval between manual inspections is long, and the carbon brush may have worn to a dangerous critical point without being detected between two inspections; shutdown inspections affect power generation efficiency; visual judgment is easily affected by subjective factors and the environment (such as dust and confined space), resulting in low accuracy and the risk of missed detections.

[0004] Therefore, how to provide a generator carbon brush wear detection device is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] One objective of this invention is to provide a generator carbon brush wear detection device, which solves the problem in the prior art that it is difficult to detect the wear status of generator carbon brushes in real time, effectively, and without stopping the machine.

[0006] A generator carbon brush wear detection device according to an embodiment of the present invention includes a motor housing, a commutator, and a carbon brush body. Two sets of limiting shells are symmetrically arranged inside the motor housing, with the other ends of the two sets of limiting shells extending to the outside of the motor housing. Mounting components are arranged inside the two sets of limiting shells. The carbon brush body is movably connected to the inside of the mounting components. A first spring component is also movably connected inside the mounting components. One end of the first spring component is movably connected to one end of the carbon brush body, and the other end of the carbon brush body is movably connected to the surface of the commutator. A detection assembly is arranged at the end of the mounting components away from the commutator. The detection assembly includes a winding mechanism, a connecting belt, a limit switch, and an alarm. The winding mechanism is located at the end of the mounting components located outside the motor housing. The connecting belt is wound around the winding mechanism, with the other end of the connecting belt extending from the end face of the mounting components to the inside of the mounting components and fixedly connected to the surface of the carbon brush body. The limit switch is fixedly installed on the end face of the mounting components, and the alarm is fixedly connected to the limit switch via a wire.

[0007] The winding mechanism includes a mounting base, a winding roller, a torsion spring, a turntable, and a lever. The mounting base is fixedly mounted on the end face of the mounting component. The winding roller is rotatably connected to the mounting base. The torsion spring is movably sleeved on the surface of the winding roller and fixedly connected to the opposite surfaces of the winding roller and the mounting base. The turntable is fixedly connected to the end face of the winding roller, and the lever is fixedly connected to the outermost side of the turntable.

[0008] The surface of the connecting strip is provided with a scale.

[0009] The mounting component includes a movable shell, a positioning frame, a movable rod, a plug, a through hole, a slot, and a second spring. The movable shell is movably connected inside the limiting shell. The carbon brush body and the first spring are both movably connected inside the movable shell. The positioning frame is fixedly connected to both sides of the limiting shell. The through hole is opened on the side of the limiting shell corresponding to the position of the positioning frame. The slot is opened on the side of the movable shell corresponding to the position of the through hole. The movable rod is movably inserted into the through hole. The plug is fixedly connected to the end of the movable rod near the slot and movably inserted into the slot. The other end of the movable rod extends into the interior of the positioning frame. One end of the second spring is movably connected to the end of the movable rod away from the slot. The other end of the second spring is movably connected to the inner wall of the positioning frame. The end of the plug away from the movable rod has a chamfer.

[0010] The surface of the movable shell is rotatably connected to a roller at a position corresponding to the connecting belt, and the connecting belt is movably connected to the surface of the roller.

[0011] The mounting component also includes an extrusion groove, an extrusion head, a guide cylinder, and a driving rod. The guide cylinder is fixedly connected to the side of the limiting shell and communicates with the positioning frame. The extrusion head is movably connected inside the guide cylinder. The extrusion groove is opened on the side of the moving rod and located on the extension line of the extrusion head. An extrusion chamfer is provided at the end of the extrusion head near the extrusion groove. The driving rod is fixedly connected to the end of the extrusion head away from the extrusion groove.

[0012] The number of positioning frames, movable rods, plugs, through holes, slots, and second spring components are two sets. The two sets of positioning frames, movable rods, plugs, through holes, slots, and second spring components are symmetrically arranged on both sides of the limiting shell and the movable shell. The driving rod has a "U" shaped design.

[0013] The beneficial effects of this utility model are: By linking the carbon brush displacement with the connecting belt, when the wear exceeds the limit, the connecting belt drives the winding mechanism to automatically trigger the limit switch alarm, avoiding the lag of manual inspection and ensuring the safe operation of the equipment. The scale of the connecting belt provides visual and quantitative wear data, and the torsion spring of the winding mechanism adaptively tensions to ensure that the connecting belt is always taut and avoids false triggering. The roller design reduces friction, providing double protection for monitoring accuracy. This solves the problem of difficulty in real-time, effective, and non-stop detection of generator carbon brush wear status in existing technologies.

[0014] The spring-loaded pin structure (moving rod / plug / second spring component) of the mounting component, together with the U-shaped drive rod, allows for simultaneous release of the locks on both sides with a single press, enabling quick installation and removal of carbon brushes and improving maintenance efficiency.

[0015] The torsion spring driven take-up roller automatically retracts the slack connecting belt, preventing monitoring failure due to vibration; the plug chamfer and compression chamfer design eliminates mechanical jamming and extends the life of the device. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall three-dimensional structure of a generator carbon brush wear detection device proposed in this utility model.

[0017] Figure 2 This is a three-dimensional cross-sectional view of the extrusion head position in the mounting component of a generator carbon brush wear detection device proposed in this utility model.

[0018] Figure 3 This is a three-dimensional cross-sectional structural diagram of the carbon brush body and the limiting shell in a generator carbon brush wear detection device proposed in this utility model.

[0019] Figure 4 This is a three-dimensional cross-sectional view of the movable rod position in the mounting component of a generator carbon brush wear detection device proposed in this utility model.

[0020] Figure 5 This is a cross-sectional three-dimensional structural diagram of the winding mechanism position in the detection component of a generator carbon brush wear detection device proposed in this utility model.

[0021] The attached diagram shows: 1. Motor housing; 2. Commutator; 3. Carbon brush body; 4. Limiting shell; 5. Mounting component; 6. First spring component; 7. Detection assembly; 8. Connecting belt; 9. Limit switch; 10. Alarm; 11. Mounting base; 12. Take-up roller; 13. Torsion spring; 14. Turntable; 15. Lever; 16. Scale; 17. Movable shell; 18. Positioning frame; 19. Movable rod; 20. Plug; 21. Through hole; 22. Slot; 23. Second spring component; 24. Roller; 25. Extrusion groove; 26. Extrusion head; 27. Guide cylinder; 28. Drive rod. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0023] refer to Figure 1-5 In this embodiment, the device includes a motor housing 1, a commutator 2, and a carbon brush body 3. Two sets of limiting shells 4 are symmetrically arranged inside the motor housing 1. The other ends of the two sets of limiting shells 4 extend to the outside of the motor housing 1. Mounting members 5 are arranged inside the two sets of limiting shells 4. The carbon brush body 3 is movably connected inside the mounting members 5. A first spring member 6 is also movably connected inside the mounting members 5. One end of the first spring member 6 is movably connected to one end of the carbon brush body 3, and the other end of the carbon brush body 3 is movably connected to the surface of the commutator 2.

[0024] The end of the mounting component 5 away from the commutator 2 is provided with a detection component 7. The detection component 7 includes a winding mechanism, a connecting belt 8, a limit switch 9, and an alarm 10. The winding mechanism is located at the end of the mounting component 5 outside the motor housing 1. The connecting belt 8 is wound around the winding mechanism. The other end of the connecting belt 8 extends from the end face of the mounting component 5 into the interior of the mounting component 5 and is fixedly connected to the surface of the carbon brush body 3. The limit switch 9 is fixedly installed on the end face of the mounting component 5. The alarm 10 is fixedly connected to the limit switch 9 through a wire.

[0025] In practice, the alarm 10 may not necessarily be installed on the motor housing 1, but may also be installed at the corresponding equipment location to provide an alarm function and remind staff.

[0026] refer to Figure 1-5 In this embodiment, the winding mechanism includes a mounting base 11, a winding roller 12, a torsion spring 13, a turntable 14, and a lever 15. The mounting base 11 is fixedly mounted on the end face of the mounting component 5. The winding roller 12 is rotatably connected to the mounting base 11. The torsion spring 13 is movably sleeved on the surface of the winding roller 12 and fixedly connected to the opposite surfaces of the winding roller 12 and the mounting base 11. The turntable 14 is fixedly connected to the end face of the winding roller 12. The lever 15 is fixedly connected to the outermost side of the turntable 14. A scale 16 is provided on the surface of the connecting belt 8.

[0027] The surface of the movable shell 17 is rotatably connected to the roller 24 at the position corresponding to the connecting belt 8, and the connecting belt 8 is movably connected to the surface of the roller 24.

[0028] In practice, the roller 24 guides the connecting belt 8, reduces friction on the connecting belt 8, and improves the smoothness of the connecting belt 8's movement.

[0029] refer to Figure 1-5In this embodiment, the mounting component 5 includes a movable shell 17, a positioning frame 18, a movable rod 19, a plug 20, a through hole 21, a slot 22, and a second spring 23. The movable shell 17 is movably connected inside the limiting shell 4. The carbon brush body 3 and the first spring 6 are both movably connected inside the movable shell 17. The positioning frame 18 is fixedly connected to both sides of the limiting shell 4. The through hole 21 is opened on the side of the limiting shell 4 corresponding to the position of the positioning frame 18. The slot 22 is opened on the side of the movable shell 17 corresponding to the position of the through hole 21. The movable rod 19 is movably inserted into the through hole 21. The plug 20 is fixedly connected to one end of the movable rod 19 near the slot 22 and movably inserted into the slot 22. The other end of the movable rod 19 extends into the interior of the positioning frame 18. One end of the second spring 23 is movably connected to the end of the movable rod 19 away from the slot 22. The other end of the second spring 23 is movably connected to the inner wall of the positioning frame 18. The end of the plug 20 away from the movable rod 19 is chamfered.

[0030] In practice, the chamfering is intended to facilitate compression and movement. The movable shell 17 is positioned by snap-fit ​​to prevent it from separating on its own and affecting the use of the carbon brush body 3.

[0031] refer to Figure 1-5 In this embodiment, the mounting component 5 further includes an extrusion groove 25, an extrusion head 26, a guide cylinder 27, and a driving rod 28. The guide cylinder 27 is fixedly connected to the side of the limiting shell 4 and communicates with the positioning frame 18. The extrusion head 26 is movably connected inside the guide cylinder 27. The extrusion groove 25 is opened on the side of the movable rod 19 and located on the extension line of the extrusion head 26. The end of the extrusion head 26 near the extrusion groove 25 is provided with an extrusion chamfer. The driving rod 28 is fixedly connected to the end of the extrusion head 26 away from the extrusion groove 25. The number of the positioning frame 18, movable rod 19, plug 20, through hole 21, slot 22, and second spring component 23 are two sets. The two sets of positioning frames 18, movable rod 19, plug 20, through hole 21, slot 22, and second spring component 23 are symmetrically arranged on both sides of the limiting shell 4 and the movable shell 17. The driving rod 28 has a "U" shaped design.

[0032] The working principle of this utility model is as follows: When the carbon brush body 3 shortens due to wear, the first spring 6 pushes the carbon brush body 3 to press tightly against the surface of the commutator 2. The wear of the carbon brush body 3 towards the surface of the commutator 2 pulls the connecting belt 8, which is fixedly connected to it. This pulling of the connecting belt 8 causes the take-up roller 12 of the winding mechanism to rotate. As the take-up roller 12 rotates, the torsion spring 13 stores tension, keeping the connecting belt 8 taut. As wear intensifies, the turntable 14 on the end face of the take-up roller 12 rotates synchronously, causing the lever 15 to gradually approach the limit switch 9. When the wear reaches a threshold, the lever 15 triggers the limit switch 9. When the circuit is closed (9), the alarm (10) sounds. Maintenance personnel can press the U-shaped lever (28) to activate the compression heads (26) on both sides, which push the compression grooves (25) on the movable lever (19). The compression grooves (25) cause the movable lever (19) to be squeezed into the positioning frame (18), causing the plug (20) to disengage from the slot (22) of the movable housing (17). This allows for the quick removal of the carbon brush body (3) and the mounting piece (5), facilitating the replacement of the carbon brush body (3). The connecting strap (8) is then installed on the new carbon brush body (3). After resetting, the second spring (23) automatically pushes the plug (20) to lock the movable housing (17), completing the maintenance cycle.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A generator carbon brush wear detection apparatus, characterized by, The device includes a motor housing (1), a commutator (2), and a carbon brush body (3). Two sets of limiting shells (4) are symmetrically arranged inside the motor housing (1). The other end of the two sets of limiting shells (4) extends to the outside of the motor housing (1). Mounting parts (5) are arranged inside the two sets of limiting shells (4). The carbon brush body (3) is movably connected inside the mounting parts (5). A first spring (6) is also movably connected inside the mounting parts (5). One end of the first spring (6) is movably connected to one end of the carbon brush body (3), and the other end of the carbon brush body (3) is movably connected to the surface of the commutator (2). The mounting component (5) is provided with a detection component (7) at the end away from the commutator (2). The detection component (7) includes a winding mechanism, a connecting belt (8), a limit switch (9), and an alarm (10). The winding mechanism is located at the end of the mounting component (5) outside the motor housing (1). The connecting belt (8) is wound around the winding mechanism. The other end of the connecting belt (8) extends from the end face of the mounting component (5) into the interior of the mounting component (5) and is fixedly connected to the surface of the carbon brush body (3). The limit switch (9) is fixedly installed on the end face of the mounting component (5). The alarm (10) is fixedly connected to the limit switch (9) through a wire.

2. A generator carbon brush wear detection device according to claim 1, characterised in that, The winding mechanism includes a mounting base (11), a winding roller (12), a torsion spring (13), a turntable (14), and a lever (15). The mounting base (11) is fixedly mounted on the end face of the mounting component (5). The winding roller (12) is rotatably connected to the mounting base (11). The torsion spring (13) is movably sleeved on the surface of the winding roller (12) and fixedly connected to the opposite surfaces of the winding roller (12) and the mounting base (11). The turntable (14) is fixedly connected to the end face of the winding roller (12). The lever (15) is fixedly connected to the outermost side of the turntable (14).

3. The generator carbon brush wear detection device according to claim 2, characterized in that, The surface of the connecting strip (8) is provided with a scale (16).

4. A generator carbon brush wear detection device according to claim 3, characterised in that, The mounting component (5) includes a movable shell (17), a positioning frame (18), a movable rod (19), a plug (20), a through hole (21), a slot (22), and a second spring (23). The movable shell (17) is movably connected inside the limiting shell (4). The carbon brush body (3) and the first spring (6) are both movably connected inside the movable shell (17). The positioning frame (18) is fixedly connected to both sides of the limiting shell (4). The through hole (21) is opened on the side of the limiting shell (4) corresponding to the position of the positioning frame (18). The slot (22) is opened on the side of the movable shell (17). Corresponding to the position of the through hole (21), the movable rod (19) is movably inserted into the inside of the through hole (21), the plug (20) is fixedly connected to one end of the movable rod (19) near the slot (22) and movably inserted into the inside of the slot (22), the other end of the movable rod (19) extends into the inside of the positioning frame (18), one end of the second spring (23) is movably connected to the end of the movable rod (19) away from the slot (22), the other end of the second spring (23) is movably connected to the inner wall of the positioning frame (18), and the end of the plug (20) away from the movable rod (19) is provided with a chamfer.

5. A generator carbon brush wear detection device according to claim 4, characterised in that, The surface of the movable shell is rotatably connected to the position of the connecting belt (8), and the connecting belt (8) is movably connected to the surface of the roller (24).

6. A generator carbon brush wear detection device according to claim 5, wherein, The mounting component (5) also includes an extrusion groove (25), an extrusion head (26), a guide cylinder (27), and a driving rod (28). The guide cylinder (27) is fixedly connected to the side of the limiting shell (4) and communicates with the positioning frame (18). The extrusion head (26) is movably connected inside the guide cylinder (27). The extrusion groove (25) is opened on the side of the movable rod (19) and located on the extension line of the extrusion head (26). The end of the extrusion head (26) near the extrusion groove (25) is provided with an extrusion chamfer. The driving rod (28) is fixedly connected to the end of the extrusion head (26) away from the extrusion groove (25).

7. A generator carbon brush wear detection device according to claim 6, characterised in that, The number of the positioning frame (18), movable rod (19), plug (20), through hole (21), slot (22) and second spring (23) is two sets. The two sets of positioning frames (18), movable rod (19), plug (20), through hole (21), slot (22) and second spring (23) are symmetrically arranged on both sides of the limiting shell (4) and the movable shell (17). The driving rod (28) is a "U" shaped design.

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