CN211701763U

CN211701763U - Motor shaft current eliminating device

Info

Publication number: CN211701763U
Application number: CN202020550757.9U
Authority: CN
Inventors: 林斌骞
Original assignee: Jiangsu Speed Elecytical Machinery Stock Co ltd
Current assignee: Jiangsu Speed Elecytical Machinery Stock Co ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-10-16
Anticipated expiration: 2030-04-15

Abstract

The utility model discloses a motor shaft electric current remove device, including motor shell, pivot and collecting ring, the motor shell internal rotation is connected with the pivot, the pivot with motor shell junction nestification has the bearing, pivot one end is pegged graft and is had the collecting ring, motor shell is just right collecting ring one side is connected with the carbon brush through the draw-in groove, the welding of carbon brush one side has earth conductor, the collecting ring both sides are provided with the insulation board. Has the advantages that: the utility model discloses a set up collecting ring, carbon brush, earth conductor and insulation board, can guide the electric charge to remove the gathering electric charge, then through carbon brush and earth conductor ground connection to eliminate the axle current, prolong the life of pivot, cut off the electric charge motion through the insulation board in addition, improve collecting ring's electrically conductive effect, increase the practicality of device.

Description

Motor shaft current eliminating device

Technical Field

The utility model relates to a motor technical field, concretely relates to motor shaft current remove device.

Background

When the motor is driven by the inverter, a voltage called a shaft voltage is generated between both ends of a rotor shaft of the motor and the shaft and the bearing, and when the motor is driven by the inverter, an influence thereof is increased due to the fact that an output waveform contains a higher harmonic component, and the output waveform is increased in proportion to an operating frequency, and if the shaft voltage exceeds a value allowed by the bearing, the shaft and the bearing are damaged by oil film discharge or conduction.

The current eliminating device of the existing motor shaft is simple, the current eliminating device is grounded through the installation of the carbon brush to achieve the effect of eliminating current, and current charges cannot be effectively gathered, so that the charges easily flow through the shell of the motor to influence the current eliminating efficiency.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

In order to overcome the defects of the prior art, the motor shaft current eliminating device is provided, and the problems that the existing motor shaft current eliminating device is simple, the current eliminating effect is achieved by grounding through an installation carbon brush, the current charge cannot be effectively gathered, the charge flows through a motor shell easily, and the current eliminating efficiency is influenced are solved.

(II) technical scheme

The utility model discloses a following technical scheme realizes: the utility model provides a motor shaft electric current remove device, including motor shell, pivot and collecting ring, the motor shell internal rotation is connected with the pivot, the pivot with motor shell junction nestification has the bearing, pivot one end is pegged graft and is had the collecting ring, motor shell is just right collecting ring one side is connected with the carbon brush through the draw-in groove, the welding of carbon brush one side has earth conductor, the collecting ring both sides are provided with the insulation board.

Furthermore, a current inductor is inserted at one end of the rotating shaft, which is close to the collecting ring.

Through adopting above-mentioned technical scheme, through motor shell provides the outrigger, through the bearing makes the pivot can rotate, through collecting ring guide charge removes, gathers the electric charge, then passes through the carbon brush with earth conductor ground connection to eliminate the axle current, the extension the life of pivot, through the insulation board can keep apart the electric charge motion, improves the electrically conductive effect of collecting ring strengthens the electric current elimination effect, through current inductor can real-time detection current between the pivot, can in time break circuit when the electric current is too high, protects the circuit, reduces the potential safety hazard, increases the safety in utilization of motor.

Furthermore, a junction box is formed on one side of the upper end of the motor shell, and the grounding lead and the current inductor are electrically connected with the junction box.

By adopting the technical scheme, the shaft grounding device can be connected with an external driver and a grounding device, and shaft current is eliminated.

Furthermore, the middle part of the rotating shaft is rotatably connected with a rotor winding, and a rotor core is nested in the middle part of the rotor winding.

By adopting the technical scheme, the magnetic circuit is provided, and potential and current are induced to form a part of the motor circuit.

Furthermore, a stator winding is nested in the position, right opposite to the rotor winding, of the motor shell, and a stator iron core is nested on the stator winding.

By adopting the technical scheme, the rotating magnetic field can be generated to form a part of the motor circuit.

Furthermore, the other end of the rotating shaft is connected with a fan through a bolt.

Through adopting above-mentioned technical scheme, dispel the heat to the motor, improve the safety in utilization of motor.

(III) advantageous effects

Compared with the prior art, the utility model, following beneficial effect has:

1. in order to solve the problems that the current eliminating device of the motor shaft is simple, the current eliminating device is grounded by installing the carbon brush to achieve the effect of eliminating the current, and the current charge cannot be effectively gathered, so that the charge can easily flow through the shell of the motor and the current eliminating efficiency is influenced, the utility model discloses a collecting ring, the carbon brush, the grounding wire and the insulating plate are arranged, the charge can be guided to move and gathered, then the grounding is carried out through the carbon brush and the grounding wire, so that the shaft current is eliminated, the service life of the rotating shaft is prolonged, in addition, the charge motion is cut off through the insulating plate, the conductive effect of the collecting ring is;

2. for solving current motor shaft can not effectively monitor the electric current size that flows when rotating, can not protect the circuit of motor, influence the life's of motor problem, the utility model discloses a set up the current inductor, can the real-time detection electric current between the pivot, can in time break circuit when the electric current is too high, protect the circuit, reduce the potential safety hazard, increase the safety in utilization of motor.

Drawings

Fig. 1 is a schematic structural view of a motor shaft current eliminating device according to the present invention;

fig. 2 is a right side view of the rotating shaft, the collecting ring, the carbon brush and the current sensor in the current eliminating device for the motor shaft according to the present invention;

fig. 3 is a schematic structural diagram of an insulating plate in the motor shaft current eliminating device according to the present invention.

The reference numerals are explained below:

1. a motor case; 2. a rotating shaft; 3. a fan; 4. a stator core; 5. a stator winding; 6. a rotor core; 7. a rotor winding; 8. a bearing; 9. a carbon brush; 10. a collector ring; 11. an insulating plate; 12. a ground lead; 13. a junction box; 14. a current sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1-3, a motor shaft current eliminating device in this embodiment includes a motor housing 1, a rotating shaft 2 and a current collecting ring 10, the rotating shaft 2 is rotatably connected in the motor housing 1, a bearing 8 is nested at a joint of the rotating shaft 2 and the motor housing 1, the current collecting ring 10 is inserted at one end of the rotating shaft 2, a carbon brush 9 is connected to one side of the motor housing 1, which faces the current collecting ring 10, through a clamping slot, one side of the carbon brush 9 is welded with a grounding wire 12, two sides of the current collecting ring 10 are provided with insulating plates 11, a current inductor 14 is inserted at one end of the rotating shaft 2, which is close to the current collecting ring 10, a stable support is provided by the motor housing 1, the rotating shaft 2 is rotated by the bearing 8, the current is guided by the current collecting ring 10 to move and collect charges, and then the shaft current is grounded by the carbon, the conductive effect of the collecting ring 10 is improved, the current eliminating effect is enhanced, the current between the rotating shafts 2 can be detected in real time through the current inductor 14, when the current is too high, a circuit can be timely disconnected, the circuit is protected, potential safety hazards are reduced, the use safety of the motor is improved, a junction box 13 is formed on one side of the upper end of the motor shell 1, the grounding lead 12 and the current inductor 14 are electrically connected with the junction box 13 and can be connected with an external driver and a grounding device, and the shaft current is eliminated.

As shown in fig. 1, in this embodiment, a rotor winding 7 is rotatably connected to the middle of the rotating shaft 2, a rotor core 6 is nested in the middle of the rotor winding 7 to provide a magnetic circuit, and induce an electric potential and an electric current to form a part of a motor circuit, a stator winding 5 is nested in a position facing the rotor winding 7 in the motor housing 1, and a stator core 4 is nested on the stator winding 5 to generate a rotating magnetic field to form a part of the motor circuit.

As shown in fig. 1, in this embodiment, a fan 3 is connected to the other end of the rotating shaft 2 through a bolt, so as to dissipate heat from the motor, thereby improving the safety of the motor.

The specific implementation process of this embodiment is as follows: when the motor works, the stator winding 5 is embedded in the stator core 4 to provide a magnetic circuit, a rotating magnetic field is generated by the stator winding 5, the rotor winding 7 is embedded in the rotor core 6 to provide a magnetic circuit, potential and current are induced by the rotor winding 7 to form a part of a motor circuit, the rotating shaft 2 is driven to rotate to provide mechanical force, when the rotating shaft 2 rotates, the electric charge is guided to move through the collecting ring 10 to gather the electric charge, then the shaft current is eliminated by grounding through the carbon brush 9 and the grounding lead 12, the service life of the rotating shaft 2 is prolonged, the electric charge movement is cut off through the insulating plate 11, the electric conduction effect of the collecting ring 10 is improved, the current elimination effect is enhanced, in addition, the current between the rotating shafts 2 can be detected in real time through the current inductor 14, and the circuit can be cut off in time when the current is too high, protect the circuit, reduce the potential safety hazard, increase the safety in utilization of motor, also can drive fan 3 when pivot 2 rotates and rotate, dispel the heat to the motor, improve the safety in utilization of motor.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the spirit and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by the technical solution of the present invention by those skilled in the art should fall into the protection scope of the present invention, and the technical contents claimed by the present invention have been fully recorded in the claims.

Claims

1. A motor shaft current cancellation device, characterized by: including motor case (1), pivot (2) and collecting ring (10), motor case (1) internal rotation is connected with pivot (2), pivot (2) with motor case (1) junction nestification has bearing (8), pivot (2) one end is pegged graft and is had collecting ring (10), motor case (1) is just right collecting ring (10) one side is connected with carbon brush (9) through the draw-in groove, the welding of carbon brush (9) one side has earth conductor (12), collecting ring (10) both sides are provided with insulation board (11).

2. A motor shaft current cancellation arrangement as claimed in claim 1, wherein: and a current inductor (14) is inserted at one end of the rotating shaft (2) close to the collecting ring (10).

3. A motor shaft current cancellation arrangement as claimed in claim 2, wherein: a junction box (13) is formed on one side of the upper end of the motor shell (1), and the grounding lead (12) and the current inductor (14) are electrically connected with the junction box (13).

4. A motor shaft current cancellation arrangement as claimed in claim 1, wherein: the middle of the rotating shaft (2) is rotatably connected with a rotor winding (7), and a rotor core (6) is nested in the middle of the rotor winding (7).

5. The motor shaft current cancellation device according to claim 4, wherein: the motor is characterized in that a stator winding (5) is embedded in the position, right opposite to the rotor winding (7), of the motor shell (1), and a stator iron core (4) is embedded on the stator winding (5).

6. A motor shaft current cancellation arrangement as claimed in claim 1, wherein: the other end of the rotating shaft (2) is connected with a fan (3) through a bolt.