WO2016008386A1

WO2016008386A1 - Self-controlled brushless motor liquid resistance starter

Info

Publication number: WO2016008386A1
Application number: PCT/CN2015/083671
Authority: WO
Inventors: 尚勤贵
Original assignee: 尚勤贵; 尚金铎; 尚金鸽
Priority date: 2014-07-14
Filing date: 2015-07-09
Publication date: 2016-01-21
Also published as: CN104065308A

Abstract

Disclosed is a self-controlled brushless motor liquid resistance starter, comprising movable electrodes (6), stationary electrodes (5), and an elastic resistance apparatus that prevents the movable electrodes from moving toward the stationary electrodes. The six stationary electrodes are all arranged on the outer wall of the cavity of a liquid-storing cylinder (1). Provided at either side of each stationary electrode is an insulating support post (4). Two ends of a support panel (2) are fastened on the insulating support posts by means of screws. A guiding rod (7) is slidably arranged in a guiding hole of the support panel, the outer end of the guiding rod being provided with a movable electrode opposite a stationary electrode, and the inner end being provided with a large-diameter step-post; a compression spring (8) sleeves the guiding rod between the support panel and the large-diameter step-post at the inner end of the guiding rod; the two ends of a flexible electrically conductive cord (10) are connected respectively to the inner end of the guiding rod and a stud on the cover of the liquid-storing cylinder. The present invention has the substantial advantages of small volume, flexibly movable electrodes, fast and easy assembly and maintenance, and reliability and safety.

Description

Brushless automatic control motor liquid resistance starter

Technical field

The invention relates to a technology for applying a winding (slip ring) motor, in particular to a brushless self-control motor liquid resistance starter.

Background technique

Patent No. 03112809.2 is a soft starter for brushless automatic control motor. The following technical solution is disclosed. The annular electrolyte reservoir is fixedly sleeved on the motor shaft, and the static electrode and the moving electrode are relatively placed radially along the rotating shaft, and relative to The axial center and the static electrode are disposed on the outer side of the movable electrode, and the inner cavity of the electrolyte storage container is provided with a guiding rod disposed in the radial direction, the movable electrode is slidably mounted thereon, and the movable electrode is disposed between the movable electrode and the static electrode. An elastic resistance device that moves toward the stationary electrode, and an electrolyte valve and an safety valve are further disposed on the electrolyte reservoir.

This invention also provides a specific embodiment in which a pair of tension springs are symmetrically disposed between the movable electrode and the side wall of the inner ring of the cavity, and the two ends of the tension spring are respectively hung on the movable electrode and the cavity. On the insulating ring on the side wall of the inner ring. This technical solution is a technical solution of a soft starter that has been produced by the patentee. The technical solution has the following defects. Since the voltages of the moving electrode and the static electrode are generally 500 volts to 3000 volts, the tension spring and the moving electrode are metal conductors, although An insulating ring is arranged on the side wall of the inner ring and the moving electrode. The length of the insulating ring should meet the requirement of voltage non-breakdown. Therefore, the radial dimension of the annular liquid reservoir should be increased; the movement of the moving electrode on the guiding rod should be flexible. This requires high precision of the parameter error of the symmetrically set tension spring; at least two tension springs are required, and six spring electrodes require 12 tension springs, and the assembly workload is large; this technical solution still has defects that cannot be repaired, and the guide rod has The two ends are fixed on the annular inner side wall and the outer side wall of the cavity, and the moving electrode slides on the guide rod, and once damaged, it cannot be repaired.

Summary of the invention

The object of the present invention is to provide a brushless self-control motor liquid resistance starter with small volume, flexible movement of the moving electrode, convenient and quick assembly and maintenance, and high safety.

A technical solution for achieving the object of the present invention is a brushless self-control motor liquid resistance starter, comprising a moving electrode, a static electrode and an elastic resistance device for preventing the moving electrode from moving to the static electrode, wherein the six static electrodes are uniformly distributed On the outer side wall of the inner cavity of the liquid storage cylinder, the insulating pillars are arranged on both sides of the static electrode, and the two ends of the supporting plate are fixed on the insulating pillar by screws, and the guiding rod is slidably arranged in the guiding hole of the supporting plate. The outer end of the guiding rod is provided with a moving electrode opposite to the static electrode, and the inner end is provided with a large-diameter stepped cylinder, and the compression spring is sleeved between the supporting plate and the large-diameter stepped cylinder at the inner end of the guiding rod. On the rod, the two ends of the flexible conductive strip are respectively connected to the inner end of the guide rod and the terminal on the end cap of the liquid reservoir.

In order to ensure that the movable electrode and the static electrode can be contacted when the brushless self-controlled motor liquid resistance starter is in operation, the difference between the stroke of the guide rod and the compression spring when the compression spring is crushed is ≥ between the movable electrode and the static electrode in the static state. distance.

The brushless self-controlled motor liquid resistance starter can be applied to vertical motors or horizontal motors.

In order to discharge the exhaust pressure, the internal and external air pressures of the starter are balanced, and at the same time, the liquid in the liquid storage cylinder is facilitated to be injected and discharged, and the liquid storage cylinder is further provided with an exhaust valve. The exhaust valve can also be symmetrically placed on the reservoir to facilitate dynamic balancing. The exhaust valve is preferably a centrifugal exhaust valve.

In order to improve product versatility and interchangeability, the brushless self-controlled motor liquid resistance starter is suitable for a vertical motor or a horizontal motor.

Compared with the prior art, the invention has the advantages of small volume, flexible moving electrode movement, convenient and quick assembly and maintenance, and safety and reliability.

DRAWINGS

1 is a schematic structural view of a liquid-resistance starter of a brushless self-control motor according to the present invention;

Fig. 2 is a cross-sectional view taken along line A-A of Fig. 1;

detailed description

In order to solve the defects of the prior art, the present invention adopts the following technical solution. The annular liquid storage cylinder 1 is sleeved on the motor shaft 11, and the key is uniformly distributed in the inner cavity of the annular liquid storage tank by the key transmission torque. The movable electrodes 6 are respectively opposite to the static electrodes 5 on the outer side wall of the inner cavity of the annular liquid storage tank, and an insulating pillar 4 is disposed on each of the left and right sides of each of the static electrodes, and a screw hole is arranged at each end of the insulating pillar, wherein the upper end is provided with a threaded hole The threaded hole is matched with a screw fixed to the outer side wall of the inner cavity, the screw 3 is matched with the threaded hole of the other end of the insulating post, and two ends of the support plate 2 are provided with two threaded holes opposite to the other end of the insulating post. The threaded through hole is fixed on the insulating pillar by the above two screws, the support plate may be a metal support plate or a support plate made of an insulating material, the guide sleeve is a stepped cylinder body, and the small diameter column body is disposed In the hole of the support plate, the two screws pass through the two screw through holes of the support plate to match the threaded holes of the step body of the guide sleeve. In the embodiment shown in FIG. 2, the guide sleeve and the support plate are integrated. . A guide rod 7 made of a metal material is slidably fitted in a hole of the guide sleeve or the support plate, and the movable electrode 6 is welded to the outer end of the guide rod opposite to the static electrode, and the inner end of the guide rod is a large diameter step a compression spring 8 (elastic resistance device) is sleeved on the guide rod between the support plate and the large-diameter step body at the inner end of the guide rod, and the inner end of the guide rod and the wiring on the end cover of the liquid storage cylinder A flexible conductive strip 10 is provided between the columns 9. The above-mentioned insulating post, the support plate and the screws for fixing the support plate are all made of polytetrafluoroethylene having high insulation properties. The exhaust valve is a well-known exhaust valve. When the guide rod 7 is in a stationary state, the distance between the moving and stationary electrodes depends on the rotor voltage of the motor, because the motor capacity is 55KW. The voltage of the rotor of the motor is different from 120V to 4000V. At the same time, the distance between the water and the electrical breakdown is also directly related. Therefore, when the voltage is high, the distance between the moving and static electrodes is far. When the guide rod 7 is in the moving state, in order to ensure that the movable electrode 6 and the static electrode 5 can be contacted when the brushless self-controlled motor liquid resistance starter is in operation, the difference between the stroke of the guide rod 7 and the compression spring 8 is ≥ The distance between the movable electrode 6 and the stationary electrode 5 in a stationary state. That is to say, when the movable electrode 6 and the static electrode 5 are in contact with each other, the compression spring 8 does not reach the maximum compression stroke. If the outer side does not have any blocking, the movable electrode 6 can be further driven by the centrifugal force under the driving of the motor shaft 11. Moving to the outside, thereby ensuring that the moving electrode 6 and the stationary electrode 5 are always in a pressed state. Silver and tungsten contacts are soldered on the plates of the moving and stationary electrodes to increase their conductance.

The brushless self-control motor liquid resistance starter provided by the invention further comprises an exhaust valve (not shown), the structure of the exhaust valve can be seen in the known exhaust valve, the exhaust valve can be exhausted, and the balance starter Internal and external air pressure, and has the function of acting as a water outlet and a water inlet for injecting liquid or discharging liquid into the liquid reservoir. The venting valve is preferably a centrifugal venting valve. For the specific structure and working process, refer to the utility model patent document No. 200920092058.8, which is not described herein again. The arrangement of the exhaust valve on the liquid storage cylinder can be set on one side. For the specific structure, refer to FIG. 1 in the utility model patent document No. 200920091386.6. On this basis, the exhaust valve can also be symmetrically arranged to facilitate dynamic balancing. In addition, for safety performance, an explosion-proof valve can be added to the large-capacity starter.

As shown in FIG. 1 and in conjunction with FIG. 2, the working process of the present invention is as follows: when the brushless self-control motor liquid resistance starter is started, the motor shaft 11 drives the annular liquid storage cylinder 1 to rotate by the key transmission torque, and the movable electrode 6 Under the action of centrifugal force, the resistance of the compression spring 8 is overcome toward the static electrode 5. The greater the rotational speed, the larger the centrifugal force, the closer the distance between the movable electrode 6 and the static electrode 5 is, the smaller the resistance between the static and dynamic electrodes is, and the rotational speed reaches the rated speed. When the value is reached, the movable electrode 6 and the static electrode 5 are in contact, and the resistance between the moving and stationary electrodes is zero, and the starting process is completed.

It should be added that the brushless self-control motor liquid resistance starter of the invention has strong versatility and can be applied to a vertical motor or a horizontal motor, and the structural difference when applied to the above two types of motors is not large.

In summary, the guide rod and the moving electrode used in the invention are fixed on the outer side wall of the inner cavity of the liquid storage cylinder through the insulating pillar, and the installation and disassembly and maintenance are very convenient, and the compression spring does not have the problem of uneven force, the guide rod and The distance between the side walls of the inner ring of the inner cavity is large, and it is not necessary to increase the diameter of the reservoir. Therefore, the present invention has significant advantages in comparison with the prior art, such as small size, flexible movement of the moving electrode, convenient and quick assembly and maintenance, and safety and reliability.

Claims

A brushless self-control motor liquid resistance starter comprises a moving electrode (6), a static electrode (5) and an elastic resistance device for preventing the moving electrode from moving to the static electrode, wherein the six static electrodes (5) are uniformly distributed On the outer side wall of the inner cavity of the liquid storage cylinder (1), insulating pillars (4) are arranged on both sides of each static electrode (5), and both ends of the support plate (2) are fixed to the insulating pillars (4) by screws a guide rod (7) is slidably disposed in the guide hole of the support plate (2), and an outer end of the guide rod (7) is provided with a movable electrode (6) opposite to the static electrode (5), The end is provided with a large-diameter stepped cylinder, and the compression spring (8) is sleeved on the guide rod (7) between the support plate (2) and the large-diameter stepped cylinder at the inner end of the guide rod, and the two flexible conductive strips (10) The ends are respectively connected to the inner end of the guide rod (7) and the terminal (9) on the end cap of the reservoir (1).
The liquid-resistance starter for a brushless self-control motor according to claim 1, wherein a difference between a stroke of the guide rod (7) and a compression spring (8) is ≥ a static electrode at a stationary state ( 6) The distance from the static electrode (5).
The liquid-resistance starter for a brushless self-control motor according to claim 1, characterized in that the liquid storage cylinder (1) is further provided with an exhaust valve.
A brushless self-controlled motor liquid resistance actuator according to claim 3, wherein said exhaust valve is preferably a centrifugal exhaust valve.
A brushless self-controlled motor liquid resistance starter according to claim 3, wherein said exhaust valve is symmetrically disposed on said liquid reservoir (1).
The brushless self-control motor liquid resistance starter according to any one of claims 1 to 5, wherein the brushless self-control motor liquid resistance starter is suitable for a vertical motor or a horizontal motor.