Generator carbon brush structure with limiting function
By designing a limiting shell, main spring, secondary spring, and strain gauge sensor in synergy, the problem of excessive displacement of the carbon brush due to alternating stress is solved, achieving stable contact between the carbon brush and the slip ring and stable current conduction, thus ensuring the reliable operation of the generator.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-19
- Publication Date
- 2026-04-10
AI Technical Summary
During generator operation, the alternating stress generated by the continuous expansion and contraction of the springs on the carbon brushes exceeds the fatigue limit, leading to excessive displacement. This affects the contact stability with the slip rings, which in turn affects current conduction and the normal operation of the generator.
A generator carbon brush structure with a limiting function was designed, including a limiting shell, a main spring, a secondary spring, a rubber block, and a strain gauge sensor. The limiting shell and the spring work together to prevent excessive displacement of the carbon brush, and the preload of the secondary spring is adjusted by a threaded rod. The strain gauge sensor enables fault monitoring and early warning.
Ensure good contact between the carbon brush and the slip ring to guarantee stable current conduction, monitor and adjust the elastic support force in a timely manner, and ensure reliable generator operation.
Smart Images
Figure CN224110641U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to generator carbon brush structure technical field, concretely is a kind of generator carbon brush structure with limiting function. BACKGROUND
[0002] Generator carbon brush structure with limiting function is mainly composed of carbon brush body and brush grip, carbon brush body is generally made of graphite and other conductive materials, its shape is usually cuboid or cylinder, its function is to contact with the slip ring on the rotating part of generator, and current is conducted from rotating part to stationary circuit;
[0003] In brush grip, there will be some limiting structure to limit the movement of carbon brush in axial direction, can prevent carbon brush from axial displacement due to vibration and other reasons during generator operation, leading to poor contact between carbon brush and slip ring or carbon brush damage;
[0004] During generator operation, when current passes through carbon brush and current collecting ring, electromagnetic force is generated, and electromagnetic torque can fluctuate due to load change, and the fluctuation of electromagnetic torque is transmitted to rotor and current collecting ring, causing slight displacement and vibration of current collecting ring, since carbon brush is in close contact with current collecting ring, it will inevitably be affected by the vibration and produce displacement, so that spring is constantly stretched and contracted, and alternating stress is generated in the inside of spring, if the stress exceeds the fatigue limit of spring material, carbon brush can appear excessive displacement due to loss of elastic support, so that generator cannot work normally;
[0005] Therefore, a kind of generator carbon brush structure with limiting function is proposed to solve the above problems. UTILITY MODEL CONTENTS
[0006] The utility model aims at providing a kind of generator carbon brush structure with limiting function to solve the problem that when spring is constantly stretched and contracted, alternating stress is generated in the inside of spring, if the stress exceeds the fatigue limit of spring material, carbon brush can appear excessive displacement due to loss of elastic support, so that generator cannot work normally.
[0007] To achieve the above object, the utility model provides the following technical scheme:
[0008] The utility model provides a generator carbon brush structure with limiting function, including brush holder, armature assembly and connecting wire, the inside of brush holder is closely installed with armature assembly, one end of armature assembly is fixedly connected with collecting ring, one end of armature assembly is fixedly connected with connecting wire through the mode of crimping, the outside of brush holder is fixedly connected with limiting structure, limiting structure includes limit shell, the inside of limit shell is connected with carbon brush, carbon brush bottom is fixedly connected with main spring, the inside bottom of limit shell is equipped with the sliding slot, the bottom screw groove of sliding slot is connected with threaded rod, the bottom of threaded rod is fixedly connected with rotating shaft through the mode of welding, the upper end of threaded rod is fixedly connected with rubber block, the upper end of rubber block is fixedly connected with auxiliary spring, the bottom of rubber block is installed in the inside of sliding slot, and the bottom of carbon brush is fixedly connected with auxiliary spring another end, main spring includes main spring main part, the outside of main spring main part is equipped with installation groove, and the inside of installation groove is fixedly connected with strain gauge sensor through the mode of sticking.
[0009] As the further optimization of the utility model, the limit shell is in the shape of a cuboid, the outside of the limit shell is fixedly connected with the inside of the brush holder, the inside of the limit shell is hollow, the inner wall of the limit shell is in close contact with the outside of the carbon brush, and the bottom of the limit shell is provided with a threaded hole.
[0010] As the further optimization of the utility model, the central axes of the main spring and the auxiliary spring are located on the same vertical line, the outer diameter of the auxiliary spring is 0.6 times that of the main spring, the main spring is arranged on the outside of the auxiliary spring, and the main spring and the auxiliary spring are both perpendicular to the bottom of the limit shell.
[0011] As the further optimization of the utility model, the projection of the sliding slot and the rubber block directly above is circular, the diameter of the sliding slot is the same as that of the rubber block, the height of the sliding slot is different from that of the rubber block, the inside of the sliding slot is in close contact with the outside of the rubber block, and the central points of the sliding slot and the rubber block are located on the same vertical line.
[0012] As the further optimization of the utility model, the threaded rod penetrates through the bottom of the limit shell, the diameter of the threaded rod is matched with the threaded hole provided on the limit shell, the central points of the threaded rod and the rotating shaft are located on the same vertical line, and the outside of the rotating shaft is provided with anti-skid lines.
[0013] As the further optimization of the utility model, the bottom end of the main spring main part is fixedly connected with the inside bottom of the limit shell, the diameter of the steel wire at the upper end of the main spring main part decreases gradually from the end connected with the installation groove, and the pitches of the main spring main part are uniformly distributed.
[0014] As the further optimization of the utility model, wherein: the strain gauge sensor and the mounting groove are all arranged in spiral shape, the strain gauge sensor is attached to the inner side of the mounting groove, and the strain gauge sensor and the mounting groove are located on the side of the main spring body away from the auxiliary spring.
[0015] Compared with the prior art, the utility model has the beneficial effects that:
[0016] In the utility model, the limiting structure can prevent excessive displacement of the carbon brush, the limiting shell and the spring work together to ensure good contact between the carbon brush and the current collector ring, guarantee stable conduction of the current, the adjusting structure composed of the threaded rod and other components can flexibly adjust the pre-tightening force of the auxiliary spring, the strain gauge sensor can also realize fault monitoring and early warning of the main spring, facilitate timely maintenance, and effectively guarantee reliable operation of the generator. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the overall structure schematic view of the utility model;
[0018] Figure 2 It is the overall structure schematic view of the utility model armature assembly;
[0019] Figure 3 It is the limiting shell cross-section structure schematic view of the utility model;
[0020] Figure 4 It is the auxiliary spring installation position structure schematic view of the utility model;
[0021] Figure 5 It is the strain gauge sensor dismounting structure schematic view of the utility model.
[0022] In the drawing: 1, brush holder; 2, armature assembly; 3, connecting wire; 4, current collector ring;
[0023] 5, limiting structure; 51, limiting shell; 52, carbon brush; 53, main spring; 531, main spring body; 532, mounting groove; 533, strain gauge sensor; 54, sliding slot; 55, rotating shaft; 56, threaded rod; 57, rubber block; 58, auxiliary spring. DETAILED DESCRIPTION
[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0025] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components, and / or combinations thereof.
[0026] Referring to Figures 1-5 The utility model provides a technical scheme:
[0027] A generator carbon brush structure with limiting function, including brush grip 1, armature assembly 2 and connecting wire 3, armature assembly 2 is tightly installed in brush grip 1, armature assembly 2 one end is fixedly connected with collecting ring 4, armature assembly 2 one end is fixedly connected with connecting wire 3 through the mode of crimping, brush grip 1 outside fixedly connected with limiting structure 5, limiting structure 5 includes limiting shell 51, carbon brush 52 is slidably connected in the inside of limiting shell 51, carbon brush 52 bottom fixedly connected with main spring 53, the inside bottom of limiting shell 51 is provided with sliding slot 54, the bottom screw thread connection of sliding slot 54 has screw rod 56, screw rod 56 bottom is fixedly connected with rotating shaft 55 through the mode of welding, screw rod 56 upper end is fixedly connected with rubber block 57, rubber block 57 upper end is fixedly connected with auxiliary spring 58, rubber block 57 bottom is installed in the inside of sliding slot 54, auxiliary spring 58 other end is fixedly connected with carbon brush 52 bottom, main spring 53 includes main spring main body 531, and the outside of main spring main body 531 is provided with installation slot 532, and installation slot 532 inside is fixedly connected with strain gauge sensor 533 through the mode of sticking.
[0028] As a further embodiment of the above technical solution: the threaded rod 56 penetrates the bottom of the limiting shell 51, the diameter of the threaded rod 56 is matched with the threaded hole in the limiting shell 51, the center point of the threaded rod 56 and the rotating shaft 55 is located on the same vertical line, the outside of the rotating shaft 55 is provided with anti-skid lines, the height of the rubber block 57 can be changed by rotating the threaded rod 56, so as to adjust the pre-tightening force of the auxiliary spring 58, realize flexible adjustment of the elastic support force of the carbon brush 52, and ensure that the carbon brush 52 can maintain good contact with the collecting ring 4 under different working conditions;
[0029] As a further embodiment of the above technical solution: the bottom end of the main spring main body 531 is fixedly connected with the inside bottom of the limiting shell 51, the diameter of the steel wire at the upper end of the main spring main body 531 decreases gradually from one end connected with the installation slot 532, the pitch of the main spring main body 531 is uniformly distributed, providing the main elastic support force for the carbon brush 52, making the main spring 53 more flexible and effective in response to the displacement of the carbon brush 52, and quickly adapting to the position change of the carbon brush 52;
[0030] As a further implementation of the above technical solution: the projection of the chute 54 and the rubber block 57 directly above is circular, the diameter of the chute 54 and the rubber block 57 is the same, the height of the chute 54 and the rubber block 57 is different, the inner side of the chute 54 and the outer side of the rubber block 57 are in close contact, the center points of the chute 54 and the rubber block 57 are located on the same vertical line, which provides guidance and limiting for the up and down movement of the rubber block 57, ensures that the rubber block 57 can move smoothly along the vertical direction when the threaded rod 56 rotates, thereby accurately adjusting the pre-tightening force of the auxiliary spring 58, and ensuring that the elastic support force of the carbon brush 52 can be effectively adjusted.
[0031] As a further implementation of the above technical solution: the limiting shell 51 is in the shape of a rectangular parallelepiped, the outer side of the limiting shell 51 is fixedly connected with the inside of the brush holder 1, the inside of the limiting shell 51 is hollow, the inner wall of the limiting shell 51 is in close contact with the outer side of the carbon brush 52, and the bottom of the limiting shell 51 is provided with a threaded hole, which can provide a stable installation space for the carbon brush 52, prevent excessive lateral displacement of the carbon brush 52 during work, ensure stable contact between the carbon brush 52 and the collector ring 4, and thus ensure stable conduction of current.
[0032] As a further implementation of the above technical solution: the strain gauge sensor 533 and the mounting groove 532 are both provided in a spiral shape, the strain gauge sensor 533 is attached to the inner side of the mounting groove 532, and the strain gauge sensor 533 and the mounting groove 532 are located on the side of the main spring body 531 away from the auxiliary spring 58. The mounting groove 532 can well fit the strain gauge sensor 533, so that it can accurately monitor the strain of the main spring body 531.
[0033] As a further implementation of the above technical solution: the center axes of the main spring 53 and the auxiliary spring 58 are located on the same vertical line, the outer diameter of the auxiliary spring 58 is 0.6 times the outer diameter of the main spring 53, the main spring 53 is arranged on the outer side of the auxiliary spring 58, and the main spring 53 and the auxiliary spring 58 are both perpendicular to the bottom of the limiting shell 51. When the elastic force of the main spring 53 is not enough to restore the carbon brush 52 to the appropriate position, the auxiliary spring 58 can provide supplemental elastic force to ensure stable contact between the carbon brush 52 and the collector ring 4.
[0034] Work flow: When the generator is running, the current flows from the armature assembly 2 to the collector ring 4, and the current is transmitted to the external circuit through the connecting wire 3 to realize the output of electric energy, the carbon brush 52 keeps good contact with the collector ring 4 under the action of the limiting structure 5, ensures that the current can be smoothly conducted from the collector ring 4 to the carbon brush 52, the bottom of the main spring 53 is fixedly connected with the bottom of the inner side of the limiting shell 51, provides initial elastic support for the carbon brush 52, when the carbon brush 52 is displaced in the working process due to the operation of the generator, the main spring 53 and the auxiliary spring 58 play a role, the main spring 53 first provides the main elastic force, can effectively respond to the displacement of the carbon brush 52, if the elastic force of the main spring 53 is insufficient to make the carbon brush 52 return to the appropriate position, the auxiliary spring 58 starts to work, when the main spring 53 fails or needs additional elastic force, when the strain gauge sensor 533 detects that the strain of the main spring 53 appears abnormal, it can feedback to the operator in time, the operator can drive the threaded rod 56 to rotate by rotating the rotating shaft 55, and then make the rubber block 57 move up and down in the sliding groove 54, can change the pre-tightening force of the auxiliary spring 58, so as to realize the adjustment of the elastic support force of the carbon brush 52, can supplement the elastic force, ensure that the carbon brush 52 can always keep good contact with the collector ring 4, so as to check and maintain the main spring 53 or the whole limiting structure 5, ensure the normal work of the limiting structure 5.
[0035] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A generator carbon brush structure with a limiting function, comprising a brush holder (1), an armature assembly (2) and a connecting wire (3), characterized in that: The inside of the brush holder (1) is tightly installed with an armature assembly (2), one end of the armature assembly (2) is fixedly connected with a current collector ring (4), one end of the armature assembly (2) is fixedly connected with a connecting wire (3) in a press connection mode, the outside of the brush holder (1) is fixedly connected with a limiting structure (5). The limiting structure (5) comprises a limiting shell (51), the inside of the limiting shell (51) is slidably connected with a carbon brush (52), the bottom of the carbon brush (52) is fixedly connected with a main spring (53), the inside bottom of the limiting shell (51) is provided with a sliding groove (54), the bottom of the sliding groove (54) is screwedly connected with a threaded rod (56), the bottom of the threaded rod (56) is fixedly connected with a rotating shaft (55) in a welding mode, the upper end of the threaded rod (56) is fixedly connected with a rubber block (57), the upper end of the rubber block (57) is fixedly connected with a secondary spring (58), the bottom of the rubber block (57) is installed on the inside of the sliding groove (54), the other end of the secondary spring (58) is fixedly connected with the bottom of the carbon brush (52). The main spring (53) comprises a main spring body (531), the outside of the main spring body (531) is provided with a mounting groove (532), the inside of the mounting groove (532) is fixedly connected with a strain gauge sensor (533) in a sticking mode.
2. The generator carbon brush structure with a limiting function according to claim 1, characterized in that: The limiting shell (51) is in the shape of a cuboid, the outside of the limiting shell (51) is fixedly connected with the inside of the brush holder (1), the inside of the limiting shell (51) is provided in a hollow mode, the inner wall of the limiting shell (51) is tightly attached to the outside of the carbon brush (52), the bottom of the limiting shell (51) is provided with a threaded hole.
3. The generator carbon brush structure with a limiting function according to claim 1, characterized in that: The central axes of the main spring (53) and the secondary spring (58) are located on the same vertical line, the outer diameter of the secondary spring (58) is 0.6 times that of the main spring (53), the main spring (53) is arranged on the outside of the secondary spring (58), and the main spring (53) and the secondary spring (58) are both perpendicular to the bottom of the limiting shell (51).
4. The generator carbon brush structure with a limiting function according to claim 1, characterized in that: The projection of the sliding groove (54) and the rubber block (57) directly above is circular, the diameter of the sliding groove (54) is the same as that of the rubber block (57), the heights of the sliding groove (54) and the rubber block (57) are different, the inside of the sliding groove (54) is tightly attached to the outside of the rubber block (57), and the central points of the sliding groove (54) and the rubber block (57) are located on the same vertical line.
5. The generator carbon brush structure with a limiting function according to claim 1, characterized in that: The threaded rod (56) penetrates through the bottom of the limiting shell (51), the diameter of the threaded rod (56) is matched with the threaded hole provided on the limiting shell (51), the central points of the threaded rod (56) and the rotating shaft (55) are located on the same vertical line, and the outside of the rotating shaft (55) is provided with anti-skid lines.
6. The generator carbon brush structure with a limiting function according to claim 1, characterized in that: The bottom end of the main spring body (531) is fixedly connected with the inside bottom of the limiting shell (51), the diameter of the steel wire at the upper end of the main spring body (531) decreases gradually from the end connected with the mounting groove (532), and the pitches of the main spring body (531) are uniformly distributed.
7. The generator carbon brush structure with a limiting function according to claim 1, characterized in that: The strain gauge sensor (533) and the mounting groove (532) are both provided in a spiral shape, the strain gauge sensor (533) is attached to the inner side of the mounting groove (532), and the strain gauge sensor (533) and the mounting groove (532) are located on the side of the main spring body (531) away from the auxiliary spring (58).