Motor carbon brush on-line monitoring device

Abstract

The utility model discloses a motor carbon brush on-line monitoring device, which relates to the technical field of motor carbon brushes and comprises a motor rear shell and a carbon brush assembly. The front end in the motor rear shell is rotationally connected with a rotating shaft, and a conducting ring is fixed at the rear end of the circumferential surface of the rotating shaft; the carbon brush assembly comprises supporting strips, brush boxes, carbon brushes, conducting rods and first springs, two corresponding mounting holes are formed in the left end and the right end of the surface of the motor rear shell, the brush boxes are fixed into the mounting holes, the supporting strips are fixed to the lower sides of the brush boxes, and the two supporting strips are fixed into the motor rear shell; a carbon brush is slidably connected into the brush box, a conductive rod is fixed to the side face of the carbon brush, a sliding hole is formed in the side face of the brush box, the conductive rod is slidably connected into the sliding hole, and the circumferential face of the conductive rod is sleeved with a first spring. And meanwhile, a user can be timely reminded to replace the device after the device is abraded.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor carbon brush technical field, concretely is motor carbon brush on -line monitoring device. BACKGROUND

[0002] The device of dynamic and static contact and energy exchange. When the unit is running, the generator carbon brush needs to be in close contact with the surface of the collector ring and continuously rub to realize the energy transmission between the dynamic and static parts of the generator. Because of such long-time and continuous mechanical friction, the generator carbon brush needs to be replaced frequently. The carbon brush that is worn to a certain extent needs to be replaced in time, otherwise there is a risk that the brush holder top touches and scratches the surface of the collector ring, and even the parts heat, break or loosen due to the spark at this position, resulting in unit shutdown. Therefore, it is necessary to monitor and alarm the wear of the carbon brush in real time. At present, the monitoring of the wear of the generator carbon brush is mainly realized by periodic inspection of the operation and maintenance personnel. The carbon brush of the generator is fixed on the brush holder evenly distributed around the main shaft of the generator through the brush holder, and the installation space is extremely compact. Because of the requirement of noise reduction, the generator carbon brush chamber is usually operated in a soundproof volume;

[0003] Because of the above installation and arrangement characteristics, the operation and maintenance personnel must pass through the soundproof cover and approach the carbon brush holder to observe the operation and wear of the carbon brush by naked eye during each inspection. This method of periodic manual inspection requires the inspection personnel to approach the rotating generator to observe the wear of the carbon brush by naked eye, and to determine which carbon brush needs to be replaced by the mark line on the carbon brush. This detection mode not only has the disadvantages of large workload and low efficiency of the maintenance personnel, but also requires the operation and maintenance personnel to approach the high-speed rotating unit, which has great safety hidden danger. Therefore, we propose the motor carbon brush on-line monitoring device. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide the motor carbon brush on-line monitoring device, which can automatically detect the wear degree of the carbon brush and timely remind the user to replace it after wear, and can effectively solve the problems in the background art.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: the motor carbon brush on-line monitoring device comprises a motor rear shell and a carbon brush assembly.

[0006] The motor rear shell: the front end of the inside is rotationally connected with a rotating shaft, and the rear end of the circumferential surface of the rotating shaft is fixed with a conductive ring.

[0007] The carbon brush assembly comprises a support strip, a brush box, a carbon brush, a conductive rod and a first spring, two corresponding mounting holes are formed in the left and right ends of the surface of the motor rear shell, the brush box is fixed in the mounting holes, the support strips are fixed on the inside of the motor rear shell, the carbon brush is slidably connected in the brush box, the conductive rod is fixed on the side surface of the carbon brush, the slide hole is formed in the side surface of the brush box, the conductive rod is slidably connected in the slide hole, the first spring is sleeved on the circumferential surface of the conductive rod, one end of the first spring is fixed on the side surface of the carbon brush, the other end of the first spring is fixed in the brush box, the power supply assembly is mounted on the rear side of the brush box, the induction assembly and the wiring assembly are mounted on the front side of the brush box, the connecting assembly is mounted on one side of the wiring assembly, the connecting assembly is matched with the induction assembly, and the carbon brush assembly is arranged to supply power to the conductive ring.

[0008] Further, the induction assembly comprises an installation plate and an infrared receiver, the installation plate is fixed on the front side of the brush box, the infrared receiver is mounted on the side surface of the installation plate, and the infrared receiver is bidirectionally connected with the external PLC controller, and the induction assembly is arranged to induct the signal emitted by the infrared emitter.

[0009] Further, the wiring assembly comprises a fixed plate, a sliding rod, a connecting plate and a second spring, the fixed plate is fixed on the front side of the brush box, the slide hole is formed in the side surface of the fixed plate, the sliding rod is slidably connected in the slide hole, the connecting plate is fixed on one end of the sliding rod, the connecting plate is fixed on the side surface of the carbon brush adjacent to the connecting plate, the second spring is sleeved on the circumferential surface of the sliding rod, one end of the second spring is fixed on the side surface of the connecting plate, and the other end of the second spring is fixed on the side surface of the fixed plate, and the wiring assembly is arranged to drive the fixed tube to move.

[0010] Further, the connecting assembly comprises a fixed tube, two L-shaped metal conductive wires and an infrared emitter, the fixed tube is fixed on the end of the sliding rod away from the connecting plate, the two L-shaped metal conductive wires are fixed in the fixed tube, the two L-shaped metal conductive wires are connected with the input end and the output end of the infrared emitter respectively, the infrared emitter is matched with the infrared receiver, and the connecting assembly is arranged to be connected with the two conductive heads.

[0011] Further, the power supply assembly comprises a connecting frame, an insulating tube, a conductive head, a wiring head and a connecting cable, two corresponding connecting frames are fixed on the upper and lower sides of the brush box, the front side of the connecting frame is fixed with the insulating tube, the inside of the insulating tube is fixed with the conductive head, the rear side of the brush box is provided with the wiring head, two corresponding connecting cables are fixed in the positive and negative electrode connection ports of the wiring head, the other ends of the two connecting cables are connected with the two conductive heads respectively, and the input end of the wiring head is electrically connected with the output end of the external PLC controller, so that the infrared emitter is powered by the power supply assembly.

[0012] Further, the upper side of the surface of the motor rear shell is fixed with a mounting seat, and the upper side of the mounting seat is installed with a warning light, and the input end of the warning light is electrically connected with the output end of the external PLC controller, so that the user is reminded by the warning light.

[0013] Compared with the prior art, the motor carbon brush online monitoring device has the following advantages:

[0014] The two carbon brushes are connected with the connecting plates, and the connecting plates are moved to drive the sliding rods to move, so that the fixed tubes are moved, and the two L-shaped metal conductive wires in the fixed tubes are moved, when the two L-shaped metal conductive wires contact with the two conductive heads, the infrared emitter is powered, the infrared emitter emits a signal which is received by the corresponding infrared receiver, and the PLC controller controls the warning light to work to remind the user to replace the carbon brush, which is very convenient. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front side structure schematic view of the utility model;

[0016] Figure 2 It is a carbon brush assembly structure schematic view of the utility model;

[0017] Figure 3 It is a wiring assembly structure schematic view of the utility model;

[0018] Figure 4 It is a power supply assembly structure schematic view of the utility model.

[0019] In the figure: 1 motor rear shell, 2 rotating shaft, 3 conductive ring, 4 carbon brush assembly, 41 support strip, 42 brush box, 43 carbon brush, 44 conductive rod, 45 first spring, 5 induction assembly, 51 mounting plate, 52 infrared receiver, 6 wiring assembly, 61 fixed plate, 62 slide rod, 63 connecting plate, 64 second spring, 7 connecting assembly, 71 fixed tube, 72 L-shaped metal conductive wire, 73 infrared emitter, 8 power supply assembly, 81 connecting frame, 82 insulating tube, 83 conductive head, 84 wiring head, 85 connecting cable, 9 mounting seat, 10 warning light. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] Please refer to Figures 1-4 The technical solution provided by the present embodiment is: a motor carbon brush online monitoring device, comprising a motor rear shell 1 and a carbon brush assembly 4.

[0022] The motor rear shell 1: the front end inside is rotatably connected with a rotating shaft 2, and the rear end of the circumferential surface of the rotating shaft 2 is fixed with a conductive ring 3.

[0023] The carbon brush assembly 4: support strip 41, brush box 42, carbon brush 43, conductive rod 44 and first spring 45, the left and right ends of the surface of the motor rear shell 1 are provided with two corresponding mounting holes, the inside of the mounting hole is fixed with the brush box 42, the lower side of the brush box 42 is fixed with the support strip 41, the two support strips 41 are fixed in the inside of the motor rear shell 1, the inside of the brush box 42 is slidably connected with the carbon brush 43, the side of the carbon brush 43 is fixed with the conductive rod 44, the side of the brush box 42 is provided with a sliding hole, the conductive rod 44 is slidably connected in the inside of the sliding hole, the circumference of the conductive rod 44 is sleeved with the first spring 45, one end of the first spring 45 is fixed on the side of the carbon brush 43, the other end of the first spring 45 is fixed in the inside of the brush box 42, the rear side of the brush box 42 is provided with the power supply assembly 8, the front side of the brush box 42 is provided with the sensing assembly 5 and the wiring assembly 6, one side of the wiring assembly 6 is provided with the connecting assembly 7, the connecting assembly 7 is matched with the sensing assembly 5, the sensing assembly 5 comprises an installation plate 51 and an infrared receiver 52, the front side of the brush box 42 is fixed with the installation plate 51, the side of the installation plate 51 is provided with the infrared receiver 52, the infrared receiver 52 is bidirectionally electrically connected with the external PLC controller, the wiring assembly 6 comprises a fixed plate 61, a sliding rod 62, a connecting plate 63 and a second spring 64, the front side of the brush box 42 is fixed with the fixed plate 61, the side of the fixed plate 61 is provided with a sliding hole, the inside of the sliding hole is slidably connected with the sliding rod 62, one end of the sliding rod 62 is fixed with the connecting plate 63, the connecting plate 63 is fixed on the side of the carbon brush 43 adjacent to it, the circumference of the sliding rod 62 is sleeved with the second spring 64, one end of the second spring 64 is fixed on the side of the connecting plate 63, the other end of the second spring 64 is fixed on the side of the fixed plate 61, the connecting assembly 7 comprises a fixed tube 71, an L-shaped metal conductive wire 72 and an infrared emitter 73, one end of the sliding rod 62 away from the connecting plate 63 is fixed with the fixed tube 71, the inside of the fixed tube 71 is fixed with two L-shaped metal conductive wires 72, the two L-shaped metal conductive wires 72 are connected with the input end and the output end of the infrared emitter 73 respectively, the infrared emitter 73 corresponds to the infrared receiver 52, the power supply assembly 8 comprises a connecting frame 81, an insulating tube 82, a conductive head 83, a wiring head 84 and a connecting cable 85, the upper and lower sides of the brush box 42 are fixed with two corresponding connecting frames 81, the front side of the connecting frame 81 is fixed with the insulating tube 82, the inside of the insulating tube 82 is fixed with the conductive head 83, the rear side of the brush box 42 is provided with the wiring head 84, the positive and negative electrode connection ports of the wiring head 84 are fixed with two corresponding connecting cables 85, the other ends of the two connecting cables 85 are connected with the two conductive heads 83 respectively, the input end of the wiring head 84 is electrically connected with the output end of the external PLC controller, the power supply assembly 8 is arranged to supply power to the infrared emitter 73, the connecting assembly 7 is arranged to be connected with the two conductive heads 83, the wiring assembly 6 is arranged to drive the fixed tube 71 to move, the sensing assembly 5 is arranged to sense the signal emitted by the infrared emitter 73 through the infrared receiver 52,The carbon brush assembly 4 is arranged to supply power to the conductive ring 3.

[0024] The upper side of the motor rear shell 1 is fixed with a mounting seat 9, the upper side of the mounting seat 9 is installed with a warning light 10, the input end of the warning light 10 is electrically connected with the output end of an external PLC controller, and the warning light 10 is arranged to remind the user.

[0025] The working principle of the motor carbon brush on-line monitoring device is as follows: two wiring assemblies are arranged, so that the two carbon brushes 43 are moved and attached to the conductive ring 3 under the action of the first spring 45 connected thereto after being worn, in this process, the carbon brush 43 also drives the connecting plate 63 connected thereto to move, the connecting plate 63 moves to drive the sliding rod 62 to move, so that the fixed tube 71 moves, the fixed tube 71 moves to drive the two L-shaped metal conductive wires 72 in it to move, when the two L-shaped metal conductive wires contact with the two conductive heads 83, the infrared emitter 73 can be powered, after power supply, the infrared emitter 73 emits a signal which is received by the corresponding infrared receiver 52, after receiving, the external PLC controller controls the warning light 10 to work to remind the user to replace the carbon brush 43.

[0026] It is worth noting that the external PLC controller disclosed in the above embodiment is a specific model of Siemens S7-200, the infrared receiver 52 can be selected as CHQ0038F infrared receiver, the infrared emitter 73 can be selected as a 5mm infrared emitter, and the warning light 10 can be selected as a red LED warning light, and the external PLC controller controls the infrared emitter 73 and the warning light 10 to work by using a method commonly used in the prior art.

[0027] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process conversion, or direct or indirect application in other related technical fields, is also included in the patent protection range of the present application.

Claims

1. An on-line monitoring device for carbon brushes of an electric machine, characterized in that: It includes motor rear shell (1) and carbon brush assembly (4); Motor rear shell (1): the front end of the inside is rotatably connected with a rotating shaft (2), and the rear end of the circumferential surface of the rotating shaft (2) is fixedly connected with a conductive ring (3); Carbon brush assembly (4): support strip (41), brush box (42), carbon brush (43), conductive rod (44) and first spring (45), two corresponding installation holes are formed in the left and right ends of the surface of the motor rear shell (1), the brush box (42) is fixedly arranged in the installation hole, the lower side of the brush box (42) is fixedly connected with the support strip (41), the two support strips (41) are fixedly arranged in the inside of the motor rear shell (1), the inside of the brush box (42) is slidably connected with the carbon brush (43), the side of the carbon brush (43) is fixedly connected with the conductive rod (44), the side of the brush box (42) is provided with a sliding hole, the conductive rod (44) is slidably connected in the inside of the sliding hole, the circumferential surface of the conductive rod (44) is sleeved with the first spring (45), one end of the first spring (45) is fixedly arranged on the side of the carbon brush (43), the other end of the first spring (45) is fixedly arranged in the inside of the brush box (42), the rear side of the brush box (42) is provided with a power supply assembly (8), the front side of the brush box (42) is provided with an induction assembly (5) and a wiring assembly (6), one side of the wiring assembly (6) is provided with a connecting assembly (7), the connecting assembly (7) is matched with the induction assembly (5).

2. The on-line monitoring device for carbon brushes of electric machines according to claim 1, characterized in that: The induction assembly (5) comprises an installation plate (51) and an infrared receiver (52), the front side of the brush box (42) is fixedly connected with the installation plate (51), the side of the installation plate (51) is provided with the infrared receiver (52), and the infrared receiver (52) is bidirectionally electrically connected with the external PLC controller.

3. The on-line monitoring device for carbon brushes of electric machines according to claim 2, characterized in that: The wiring assembly (6) comprises a fixed plate (61), a sliding rod (62), a connecting plate (63) and a second spring (64), the front side of the brush box (42) is fixedly connected with the fixed plate (61), the side of the fixed plate (61) is provided with a sliding hole, the inside of the sliding hole is slidably connected with the sliding rod (62), one end of the sliding rod (62) is fixedly connected with the connecting plate (63), the connecting plate (63) is fixedly arranged on the side of the carbon brush (43) adjacent to the connecting plate (63), the circumferential surface of the sliding rod (62) is sleeved with the second spring (64), one end of the second spring (64) is fixedly arranged on the side of the connecting plate (63), and the other end of the second spring (64) is fixedly arranged on the side of the fixed plate (61).

4. The on-line monitoring device for carbon brushes of electric machines according to claim 3, characterized in that: The connecting assembly (7) comprises a fixed tube (71), an L-shaped metal conductive wire (72) and an infrared emitter (73), one end of the sliding rod (62) away from the connecting plate (63) is fixedly connected with the fixed tube (71), the inside of the fixed tube (71) is fixedly connected with two L-shaped metal conductive wires (72), the two L-shaped metal conductive wires (72) are connected with the input end and the output end of the infrared emitter (73) respectively, and the infrared emitter (73) corresponds to the infrared receiver (52).

5. The on-line monitoring device for carbon brushes of electric machines according to claim 1, characterized in that: The power supply assembly (8) includes a connecting frame (81), an insulating tube (82), a conductive head (83), a wiring head (84) and a connecting cable (85), both upper and lower sides of the brush box (42) are fixed with two corresponding connecting frames (81), the front side of the connecting frame (81) is fixed with an insulating tube (82), the inside of the insulating tube (82) is fixed with a conductive head (83), the rear side of the brush box (42) is provided with a wiring head (84), two corresponding connecting cables (85) are fixed in the positive and negative electrode connecting ports of the wiring head (84), the other ends of the two connecting cables (85) are connected with the two conductive heads (83) respectively, and the input end of the wiring head (84) is electrically connected with the output end of the external PLC controller.

6. The on-line monitoring device for carbon brushes of electric machines according to claim 1, characterized in that: The upper side of the surface of the motor rear shell (1) is fixed with a mounting seat (9), the upper side of the mounting seat (9) is provided with a warning light (10), and the input end of the warning light (10) is electrically connected with the output end of the external PLC controller.

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