CN201430563Y - Liquid resistance starter of brushless autocontrol motor - Google Patents

Abstract

The utility model discloses a liquid resistance starter of a brushless autocontrol motor, and aims to provide the liquid resistance starter of the brushless autocontrol motor with convenient maintenance and non-rising temperature of electrical resistance liquid during normal operation of the motor. The utility model adopts the key points of the technical solution that the liquid resistance starterof the brushless autocontrol motor comprises a liquid storing cylinder, electrical resistance liquid, a moving contact, a fixed contact and an exhaust valve, wherein six starting pole plates uniformly distributed are fixedly connected onto the wall of the liquid storing cylinder through an insulator so as to opposite to the inner wall of the cylinder; six guide bars are uniformly distributed on the inner wall of the cylinder outside of the end cover of one side of the liquid storing cylinder; the center hole on the end-plate of the cylinder-shaped moving contact is combined with the guide barin a step body in a sliding way; the end of the moving contact is opposite to the fixed contact on the inner wall of the cylinder body; a moving contact is sleeved on each guide bar; the two ends ofsix flexible conductive belts are connected with the binding posts uniformly distributed on the end surface of the liquid storing cylinder and the cylinder-shaped moving contact respectively, and thesix starting pole plates are electrically connected with the six binding posts respectively. The utility model is used for starting the slip ring motor.

Description

The brushless automatic control electric machine liquid resistance starter

Technical field:

The utility model relates to a kind of liquid starter, particularly a kind of brushless automatic control electric machine liquid resistance starter.

Background technology:

031128092 patent of invention has the brushless function of permanent reposefully torque soft start continuously of Wound-rotor type threephase asynchronous machine.Because the time behind the electric motor starting more than 90% is normal operation, the heat that closed sound pole plate produces raises the resistor fluid temperature in the fluid storage tank, and in addition, movable plate electrode and movable plate electrode travel mechanism are in the case and in the resistor fluid, be not easy to maintenance, useful life is short.

Summary of the invention:

The brushless automatic control electric machine liquid resistance starter that the resistor fluid temperature did not raise when the purpose of this utility model provided a kind of easy to maintenance and motor and runs well.Technical solution of the present utility model is, the brushless automatic control electric machine liquid resistance starter, comprise surge drum, resistor fluid, moving contact, fixed contact and vent valve, it is characterized in that: six uniform movable plate electrodes that rise are connected on the surge drum wall relative with cylinder inboard wall by insulator, be evenly equipped with six guide rods on the cylinder inboard wall outside surge drum one side end cap, guide rod is connected with the cylindrical shell insulation, the centre bore cunning of the moving contact end plate of tubular fits on the interior guide rod of step body, the ring surface contact of moving contact termination is relative with ring surface fixed contact on the cylinder inboard wall, be with spring on the guide rod, the two ends of this spring respectively with the moving contact end plate inner surface of tubular on insulator surface and the insulator surface on the tubular inwall contact, the two ends of six compliant conductive bands are connected with uniform binding post and the moving contact of tubular on the surge drum end face respectively, and six are played movable plate electrodes and are electrically connected with six binding posts respectively.The valve body of described vent valve is movably connected on the barrel of surge drum, to be diameter place in the surge drum less than the pipe of valve body in the bottom of this valve body, the port of export of pipe is relative with the axle of surge drum, the bottom cylinder of spool places in the pore of valve body lower portion, the diameter of this cylinder is less than the diameter of pore, the top of spool is step body, place the cavity on valve body top, the step body lower surface of this spool is relative with sealing ring on the lower surface of valve cavity, the upper end of valve cavity is provided with the cover plate that removably connects with valve body, the center of cover plate is provided with the hole that is connected with valve cavity, is provided with spring between the step body upper surface of spool and cover plate.The advantage that the utility model has compared with the prior art is easy to maintenance, the life-span long and the resistor fluid temperature does not raise during the motor operate as normal.

Description of drawings:

Fig. 1 is the structural representation of the utility model brushless automatic control electric machine starter.Fig. 2 is centrifugal exhaust structure schematic diagram.

Embodiment:

In conjunction with above accompanying drawing the utility model is elaborated, the utility model has utilized the principle of thermistor, six movable plate electrodes 9 that have been uniformly distributed along the circumference in surge drum 1 are supported on the inwall of surge drum respectively by insulator, six binding posts 7 are distributed on the end plate of surge drum one end, on the inwall of the tube outside this end plate, be evenly equipped with six guide rods 2, centre bore cunning on the end face of the moving contact 5 of tubular fits on the guide rod, the inner face of this tubular moving contact is supported on the step body of guide rod 2 terminations, annular end face fixed contact 4 uniform on the inner tube wall of the annular end face of this tubular moving contact and surge drum outer end is relative, on the guide rod between the insulator on inner tube wall and the tubular moving contact inner face, be provided with spring 3, be connected with compliant conductive band 6 between binding post and the tubular moving contact, rise between movable plate electrode and the binding post and be connected with conductive plate 8.

The used vent valve 10 of the utility model can adopt lever exhaust (water) valve in 872157399 or 88216486 patents, during with this vent valve fluid injection (tap hole) need be set on the cylinder of surge drum.The utility model adopts the vent valve 10 of design voluntarily, its structure is, the step threaded body on valve body 13 tops and the nut on the surge drum body match, its underpart is that the pipe 17 of minor diameter places in the surge drum, the mouth of pipe is close with storage liquid axle sleeve, but do not contact, the two ends of spool 14 are the minor diameter cylinder, the minor diameter cylinder 15 of bottom places the pore of valve body lower portion, cylinder and pore are matched in clearance, the size in gap is advisable ventilating, have the major diameter cylinder to place the cavity of valve body between two paxillas of spool, the lower surface of this major diameter cylinder is relative with sealing ring 16 on the valve cavity lower surface, and valve gap 11 is spirally connected with valve body, the center has axial venthole, and spring 12 is located between valve gap and the big cylinder of spool.

Operation principle of the present utility model is, during electric motor starting, movable plate electrode in the surge drum and the resistor fluid between the barrel (static plate electrode) are along with temperature progressively raises, its resistance constantly descends, motor speed increases, when motor speed near rated speed the time, moving of six centrifugal switches that surge drum is outer, the fixed contact closure, motor is worked under rated speed, because the outer dynamic/static contact of surge drum is in closure state, no current between movable plate electrode in the surge drum and housing, thereby, in the motor normal work period, the temperature of the resistor fluid in the surge drum can not raise, and resistor fluid is in temperature constant state, the stable working state of vent valve, moving contact, fixed contact and travel mechanism be not in resistor fluid, be not subjected to the corrosion of resistor fluid, the life-span is long, and is convenient to safeguard, the port of the cylindrical shell that dynamic/static contact is installed can be provided with cover plate, and dustproof and safety effect are arranged.

The operation principle of centrifugal vent valve is that during electric motor starting, when rotating speed reached certain speed, spool was thrown away on the elastic force that overcomes spring by centrifugal force and moves away sealing ring, and the gas of the center of surge drum is communicated with atmosphere.During shutdown, spring moves down with the valve body tube bore closure spool; Resistance liquid level in needs are measured surge drum when liquid feeding or tapping, is taken out valve body integral body from the screwed hole of surge drum body, inserts scale, can measuring resistance liquid level, tapping and liquid feeding.Consider that dynamic balancing can be provided with balanced body at surge drum and the symmetrical place of vent valve.This centrifugal vent valve can replace liquid injection port, tap hole and the liquid observation window in the existing brushless automatic control electric machine soft starter.

Claims (2)

1, the brushless automatic control electric machine liquid resistance starter, comprise surge drum, resistor fluid, moving contact, fixed contact and vent valve, it is characterized in that: six uniform movable plate electrodes that rise are connected on the surge drum wall relative with cylinder inboard wall by insulator, be evenly equipped with six guide rods on the cylinder inboard wall outside surge drum one side end cap, guide rod is connected with the cylindrical shell insulation, the centre bore cunning of the moving contact end plate of tubular fits on the interior guide rod of step body, the ring surface contact of moving contact termination is relative with ring surface fixed contact on the cylinder inboard wall, be with spring on the guide rod, the two ends of this spring respectively with the moving contact end plate inner surface of tubular on insulator surface and the insulator surface on the tubular inwall contact, the two ends of six compliant conductive bands are connected with uniform binding post and the moving contact of tubular on the surge drum end face respectively, and six are played movable plate electrodes and are electrically connected with six binding posts respectively.

2, brushless automatic control electric machine liquid resistance starter as claimed in claim 1, it is characterized in that: the valve body of described vent valve is movably connected on the barrel of surge drum, to be diameter place in the surge drum less than the pipe of valve body in the bottom of this valve body, the port of export of pipe is relative with the axle of surge drum, the bottom cylinder of spool places in the pore of valve body lower portion, the diameter of this cylinder is less than the diameter of pore, the top of spool is step body, place the cavity on valve body top, the step body lower surface of this spool is relative with sealing ring on the lower surface of valve cavity, the upper end of valve cavity is provided with the cover plate that removably connects with valve body, the center of cover plate is provided with the hole that is connected with valve cavity, is provided with spring between the step body upper surface of spool and cover plate.

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