Shaft voltage eliminating device of high-voltage speed regulating motor

Abstract

A shaft voltage eliminating device of a high-voltage speed regulating motor belongs to the field of thermal power generation and comprises an adjusting device and a voltage eliminating device, the adjusting device comprises a base, a first conical cylinder and a second conical cylinder which are symmetrically arranged are rotatably connected to the base and connected through a belt, and the belt is connected with a speed regulating device. The first conical cylinder is connected with a motor output shaft, the second conical cylinder is connected with a spline shaft, the spline shaft is connected with a cam, the cam is connected with a control device, the voltage eliminating device comprises a movable frame, the movable frame is connected with the cam, and the outer side of the movable frame is slidably connected with a pin; the speed adjusting device can adjust the rotating speed of the cam, the carbon brush makes contact with the output shaft of the motor once when the cam rotates by a circle, the contact time of the carbon brush and the output shaft of the motor can be adjusted by reducing the rotating speed of the second conical cylinder, the purpose of eliminating axial voltage is achieved, and the service life of the carbon brush can be prolonged. The control device can enable the cam block to be separated from or connected with the cam, when the axial voltage is small, the axial voltage can be naturally released through the motor, the movable frame and the cam can be disconnected, and abrasion of the carbon brush is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of thermal power generation, especially a high -voltage speed regulation motor shaft voltage elimination device. BACKGROUND

[0002] The high -voltage speed regulation motor is easy to axial voltage in the use process, and the main reason can be summarized as the following points:

[0003] Electromagnetic induction: when the motor rotates at high speed, the electromagnetic field generated thereby can make the surrounding metal parts charged, thereby inducing voltage on the motor shaft.

[0004] Magnetic circuit imbalance: during the manufacture or operation of the motor, due to the magnetic circuit asymmetry, the eccentric running of the rotor, the induced pulsating magnetic flux, etc., the magnetic circuit imbalance is caused, and then the induced voltage is generated on the shaft.

[0005] Electrostatic effect: in the field of motor operation, the strong electric field effect can also induce shaft voltage at both ends of the rotating shaft.

[0006] Insulation problem: when the motor insulation is poor, aging, etc., the shaft voltage can also be generated in the motor.

[0007] The existence of the axial voltage of the high -voltage speed regulation motor can cause harm to the motor and the power system: the existence of the shaft voltage and the shaft current can aggravate the wear of the bearing, cause the temperature of the bearing to rise rapidly, the lubricating grease is melted and overflowed from the bearing, forms vicious cycle, finally causes the rapid damage of the bearing. Meanwhile, the bearing wear can also cause the displacement of the motor rotor, causes the unstable operation of the motor. The shaft voltage and the shaft current can also influence the stability of the system where the motor is located, such as causing the vibration and noise of the motor, and even causing the motor to work normally.

[0008] Therefore, the axial voltage must be eliminated, and the carbon brush grounding device is a commonly used axial voltage release mode. The carbon brush grounding device is simple in structure and low in cost, but the existing carbon brush grounding device has the following problems: the carbon brush is always in contact with the shaft during the operation of the motor, the wear of the carbon brush is blocked, the service life is short, and the axial voltage cannot be eliminated due to the wear or damage of the carbon brush. In fact, when the motor starts or the load suddenly increases, due to electromagnetic induction and magnetic circuit imbalance, the axial voltage can be temporarily increased. But as the motor enters the stable running state, the magnetic circuit gradually tends to be balanced, and the axial voltage gradually decreases to a low level and remains stable. Therefore, it is unnecessary to keep the brush and the shaft in contact, and the clearance contact between the brush and the shaft can meet the release of the axial voltage. UTILITY MODEL CONTENTS

[0009] The utility model discloses to the above-mentioned shortage of prior art, provide a kind of high-voltage speed-regulating motor gap contact between carbon brush, both eliminate axial voltage and can improve the service life of carbon brush of a kind of high-voltage speed-regulating motor axial voltage elimination device.

[0010] The utility model discloses a kind of high-voltage speed-regulating motor axial voltage elimination devices, including adjusting device, voltage elimination device, the adjusting device includes base, base is rotationally connected with symmetrically arranged No.

[0011] The utility model discloses a kind of high-voltage speed-regulating motor axial voltage elimination devices, including adjusting device, voltage elimination device, the adjusting device includes base, base is rotationally connected with symmetrically arranged No.

[0012] The second cone and the first cone are rotationally connected with the second bearing seat and the third bearing seat in the middle of base respectively, the outer side of the second cone and the first cone is rotationally connected with belt, the middle shaft of the first cone is connected with motor output shaft by belt and pulley.

[0013] The control device includes No.

[0014] The fifth bearing seat is rotationally connected with the side of base in the spline shaft, the spline hole of cam is slidably connected with the spline shaft, and the spline shaft is connected with the middle shaft of the second cone by belt and pulley.

[0015] The control device includes No.

[0016] The cam surface is divided into high position stop surface and low position stop surface, when the moving frame and high position stop surface contact, high position stop surface pushes the moving frame to the outside.

[0017] The moving frame slider of the lower part of the moving frame is slidably connected with the third sliding slot outside the base, the guide rod inside the moving frame is slidably connected with the fourth bearing seat outside the base, a first spring is connected between the base and the moving frame, the first spring is sleeved outside the guide rod, the both sides of the first spring are respectively abutted with the end of the guide rod, and the cam block outside the moving frame is slidably connected with the cam.

[0018] The mobile frame front side sliding connection pin is provided with the second spring between the pin and the mobile frame, and the inside of the second spring is detachably connected with the carbon brush.

[0019] Beneficial effects: the speed regulating device can adjust the rotating speed of the cam, since the carbon brush and the motor output shaft contact once per one rotation of the cam, the contact time of the carbon brush and the motor output shaft can be adjusted by reducing the rotating speed of the second cone, which can not only eliminate the axial voltage but also prolong the service life of the carbon brush; the control device can make the cam block separate from or connect with the cam, when the axial voltage is small, the axial voltage can be naturally released by the motor, and the mobile frame and the cam can be disconnected, thereby avoiding the abrasion of the carbon brush. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The high-voltage speed-regulating motor axial voltage elimination device is shown in the structural schematic view.

[0021] Figure 2 The adjusting device and the voltage elimination device are connected in the structural schematic view.

[0022] Figure 3 The adjusting device and the voltage elimination device are connected in the right structural schematic view.

[0023] Figure 4 The base structure is shown in the structural schematic view.

[0024] Figure 5 The first adjusting seat structure is shown in the structural schematic view.

[0025] Figure 6 The second adjusting seat structure is shown in the structural schematic view.

[0026] Figure 7 The voltage elimination device structure is shown in the structural schematic view.

[0027] Figure 8 The mobile frame structure is shown in the structural schematic view.

[0028] Figure 9 The pin structure is shown in the structural schematic view. DETAILED DESCRIPTION

[0029] The utility model will be further explained in detail in the basis of the drawings and examples:

[0030] REFERENCE Figures 1 to 5The device comprises an adjusting device 100 and a voltage elimination device 200, the adjusting device 100 comprises a base 110, two second bearing seats 113 and three bearing seats 114 are symmetrically arranged in the middle of the base 110, the second bearing seats 113 on the two sides and the three bearing seats 114 on the two sides are respectively connected with the middle shafts of a second cone cylinder 155 and a first cone cylinder 150 through rotation, the second cone cylinder 155 and the first cone cylinder 150 are both conical structures with one end large and the other end small, the second cone cylinder 155 and the first cone cylinder 150 are symmetrically arranged, the outer sides of the second cone cylinder 155 and the first cone cylinder 150 are connected with a belt 160 through rotation, the position of the belt 160 is controlled by a speed adjusting device, because the rotation speed ratio of the second cone cylinder 155 and the first cone cylinder 150 is determined by the diameter of the contact position of the belt 160 and the second cone cylinder 155 and the first cone cylinder 150, the position of the belt 160 can be controlled to control the rotation speed ratio of the second cone cylinder 155 and the first cone cylinder 150, the speed adjusting device is composed of a first screw rod 140 and a first adjusting seat 120, the first screw rod 140 is connected with a first bearing seat 111 on one side of the base 110 through rotation, the first screw rod 140 is connected with a first adjusting seat screw hole 122 on the side of the first adjusting seat 120 through screwing, a first adjusting seat sliding block 121 on the lower part of the first adjusting seat 120 is connected with a first sliding groove 112 on the inner side of the first bearing seat 111 through sliding, the belt 160 is clamped in the middle of a first adjusting seat groove 123, the first screw rod 140 can drive the first adjusting seat 120 to move by being rotated, the first adjusting seat 120 drives the first screw rod 140 to move when the first adjusting seat 120 moves, so that the rotation speed ratio of the second cone cylinder 155 and the first cone cylinder 150 is changed.

[0031] Reference Figures 1 to 4 The inner sides of the three bearing seats 114 on the two sides are respectively provided with a fourth bearing seat 115 and a fifth bearing seat 116, a spline shaft 170 is connected with the middle shaft of the second cone cylinder 155 through a belt and a belt, the outer side of the spline shaft 170 is connected with a middle hole of a cam 190 through sliding, the surface of the cam 190 is divided into a high position stop surface and a low position stop surface, the outer side of the cam 190 is connected with a control device.

[0032] Reference Figure 1 , 2, 6, the control device comprises the second screw 180 and the second adjusting seat 130, the second screw 180 is rotatably connected with the fourth bearing seat 115, the fourth bearing seat 115 and the fifth bearing seat 116 are provided with the second sliding groove 117, the second adjusting seat sliding block 131 in the lower part of the second adjusting seat 130 is slidably connected with the second sliding groove 117, the second adjusting seat screw hole 132 in the side of the second adjusting seat 130 is threadedly connected with the second screw 180, the cam 190 is clamped in the second adjusting seat groove 133 in the upper part of the second adjusting seat 130, the second screw 180 can drive the second adjusting seat 130 and the cam 190 to move together by rotating, the control device can disconnect and connect the cam 190 and the moving frame 210, when the axial voltage is small or the time, the axial voltage can be naturally released through the motor 260, the moving frame 210 and the cam 190 can be disconnected, and the abrasion of the carbon brush 250 is avoided.

[0033] Reference Figures 7 to 9 , the voltage elimination device 200 is installed on the side of the base 110 close to the motor 260, the moving frame sliding block 212 in the lower part of the moving frame 210 is slidably connected with the third sliding groove 118 outside the second sliding groove 117, the guide rod 213 in the inner side of the moving frame 210 is slidably connected with the fourth bearing seat 119 outside the third sliding groove 118, the first spring 230 is arranged between the base 110 and the moving frame 210, the first spring 230 is sleeved outside the guide rod 213, the cam block 211 is arranged outside the moving frame 210, and the cam block 211 is slidably connected with the cam 190.

[0034] Reference Figures 7 to 9, the front side of the moving frame 210 is provided with a sleeve 214, the cylindrical surface of the sleeve 214 is provided with an axial sleeve groove 215, the sleeve 214 is provided with a pin 220, the pin 220 is slidingly connected with the sleeve 214, the cross pin 221 is slidingly connected with the sleeve groove 215, the pin 220 and the moving frame 210 are provided with a second spring 240, the second spring 240 is placed inside the sleeve 214, the front side of the recess 222 is provided with a recess 222, the carbon brush 250 is placed in the recess 222 and is fixed by a screw, the carbon brush 250 is connected with the ground through a wire, when the cam 190 rotates, the high position stop surface of the cam 190 contacts with the cam block 211, the cam 190 pushes the moving frame 210 out, the carbon brush 250 contacts with the output shaft of the motor 260, the first spring 230 is compressed, the carbon brush 250 releases the axial voltage of the motor 260 to the ground through the wire, when the low position stop surface of the cam 190 contacts with the moving frame 210, the moving frame 210 is pushed back by the first spring 230, the carbon brush 250 is disconnected with the output shaft of the motor 260, the speed regulating device can adjust the rotating speed of the second taper cylinder 155, when the rotating speed of the second taper cylinder 155 is adjusted to be low, the rotating speed of the cam 190 is reduced, the time of one rotation of the cam 190 is lengthened, because the carbon brush 250 contacts with the output shaft of the motor 260 once every rotation of the cam 190, the contact time of the carbon brush 250 and the output shaft of the motor 260 can be adjusted by reducing the rotating speed of the second taper cylinder 155, which not only eliminates the axial voltage but also prolongs the service life of the carbon brush, the rotating speed of the second taper cylinder 155 can be adjusted at any time according to the axial voltage, the control device can make the cam block 211 disengage or engage with the cam 190, when the axial voltage is small or zero, the axial voltage can be naturally released by the motor 260, the moving frame 210 and the cam 190 can be disconnected, which avoids the abrasion of the carbon brush 250.

[0035] When the motor 260 starts to work, the motor 260 output shaft drives the first cone drum 150 to rotate through the belt and pulley, the first cone drum 150 drives the second cone drum 155 to rotate through the belt 160, the second cone drum 155 drives the spline shaft 170 to rotate through the belt and pulley, the spline shaft 170 drives the cam 190 to rotate, when the high position stop surface of the cam 190 contacts the cam block 211, the cam 190 pushes the moving frame 210 out, the carbon brush 250 contacts the motor 260 output shaft, the first spring 230 is compressed, the carbon brush 250 releases the axial voltage of the motor 260 to the ground through the wire, when the low position stop surface of the cam 190 contacts the moving frame 210, the moving frame 210 is pushed back by the first spring 230, the carbon brush 250 is disconnected with the motor 260 output shaft, the speed regulating device can adjust the rotating speed of the second cone drum 155, when the rotating speed of the second cone drum 155 is adjusted to be low, the rotating speed of the cam 190 is reduced, the time of one rotation of the cam 190 is lengthened, since the carbon brush 250 contacts the motor 260 output shaft once per one rotation of the cam 190, the rotating speed of the second cone drum 155 is reduced to adjust the contact time of the carbon brush 250 and the motor 260 output shaft, which achieves the purpose of eliminating the axial voltage and improves the service life of the carbon brush, the rotating speed of the second cone drum 155 can be adjusted at any time according to the axial voltage, the control device can make the cam block 211 disengage or engage the cam 190, when the axial voltage is small or zero, the axial voltage can be naturally released through the motor 260, the moving frame 210 and the cam 190 can be disconnected, and the wear of the carbon brush 250 is avoided.

Claims

1. A high voltage speed-regulated motor shaft voltage elimination device, characterized in that : The application relates to a voltage elimination device (200) and an adjusting device (100), wherein the adjusting device (100) comprises a base (110), a symmetrical first cone cylinder (150) and a second cone cylinder (155) rotatably connected to the base (110), the first cone cylinder (150) and the second cone cylinder (155) are connected through a belt (160), the belt (160) is connected to a speed regulating device, the first cone cylinder (150) is connected to an output shaft of a motor (260), the second cone cylinder (155) is connected to a spline shaft (170), the spline shaft (170) is connected to a cam (190), the cam (190) is connected to a control device, the voltage elimination device (200) comprises a moving frame (210), the moving frame (210) is connected to the cam (190), the moving frame (210) is slidably connected to a pin (220) on the outside, the pin (220) is connected to a carbon brush (250), the speed regulating device and the control device control the position and speed of the cam (190), so as to control the contact time of the carbon brush (250) and the output shaft of the motor (260).

2. A high voltage shaft voltage eliminating device for a high voltage adjustable speed motor according to claim 1, characterized in that : The second cone cylinder (155) and the first cone cylinder (150) are rotatably connected to a second bearing seat (113) and a third bearing seat (114) in the middle of the base (110) respectively, the outer sides of the second cone cylinder (155) and the first cone cylinder (150) are rotatably connected to the belt (160), and the middle shaft of the first cone cylinder (150) is connected to the output shaft of the motor (260) through the belt and a pulley.

3. A high voltage shaft voltage eliminating device for a high voltage adjustable speed motor as defined in claim 1, characterized in that : The control device comprises a first adjusting seat (120) and a first screw rod (140), the first screw rod (140) is rotatably connected to a first bearing seat (111) on the outside of the base (110), the first adjusting seat (120) is slidably connected to a first sliding groove (112) on the inside of the first bearing seat (111), the first adjusting seat (120) is threadedly connected to the first screw rod (140), and the belt (160) is clamped in a first adjusting seat groove (123) on one side of the first adjusting seat (120).

4. A high voltage shaft voltage eliminating device for a high voltage adjustable speed motor as defined in claim 1, characterized in that : The spline shaft (170) is rotatably connected to a fifth bearing seat (116) on one side of the base (110), the cam (190) is slidably connected to a spline hole of the spline shaft (170), and the spline shaft (170) is connected to the middle shaft of the second cone cylinder (155) through the belt and the pulley.

5. A high voltage shaft voltage eliminating device for a high voltage adjustable speed motor as defined in claim 1, characterized in that : The control device comprises a second screw rod (180) and a second adjusting seat (130), the second screw rod (180) is rotatably connected to a fourth bearing seat (115) on one side of the base (110), the second adjusting seat (130) is slidably connected to a second sliding groove (117) between the fourth bearing seat (115) and the fifth bearing seat (116), the second adjusting seat (130) is threadedly connected to the second screw rod (180), and the cam (190) is clamped in a second adjusting seat groove (133) on the upper portion of the second adjusting seat (130).

6. A high voltage shaft voltage eliminating device for a high voltage adjustable speed motor as defined in claim 1, characterized in that : The surface of the cam (190) is divided into a high position stop surface and a low position stop surface, when the moving frame (210) is in contact with the high position stop surface, the high position stop surface pushes the moving frame (210) to the outside.

7. A high voltage speed-regulated motor shaft voltage elimination device according to claim 1, characterized in that The mobile frame (210) lower part mobile frame slider (212) sliding connection base (110) outside the three number sliding groove (118), mobile frame (210) inside the guide rod (213) sliding connection base (110) outside the four number bearing seat (119), base (110) and mobile frame (210) between the connection of the first spring (230), the first spring (230) set outside the guide rod (213), the first spring (230) both sides respectively against (219) and guide rod (213) end, mobile frame (210) outside the cam block (211) sliding connection cam (190).

8. A high voltage shaft voltage eliminating device for a high voltage adjustable speed motor as defined in claim 1, characterized in that The mobile frame (210) front side sliding connection pin (220), pin (220) and mobile frame (210) between the two number spring (240) is detachably connected inside the carbon brush (250), carbon brush (250) through the connection and the ground.

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