Fully enclosed liquid resistance starter

Abstract

A fully enclosed liquid resistance starter, characterized in that: the bottom of the electrolyte tank is divided into three separate liquid tanks by an insulating partition; the fixed electrode, the moving electrode, and the lift are located in the electrolyte, and the move The lifting frame is fixed on the lower end of the insulating rod, and the insulating rod is assembled with the lower end of the screw rod with a connecting sleeve; the elevator and the motor are installed together, and the fixed electrode is installed at the bottom of the electrolyte tank and connected to the copper bar at the lower end of the contactor. Connection; the contactor installation box and the control box are installed on the outer wall on the right side of the box; there are three ball valves on the lower left side of the box, and the connecting pipes are respectively connected to the three separate liquid tanks; the circulating pump is installed on the pump seat on the rear side wall; Three liquid delivery pipes are respectively arranged on the inner circulation pipe, and the circulation pump, the outer circulation component and the liquid distribution delivery pipe of the inner circulation pipe form a self-circulation cooling system. Sealing rings are provided between the electrolyte tank and the tank cover, between the pressure relief valve and the electrolyte tank cover, where the insulating rod and the fixed pole plate pass through the electrolyte tank cover.

Description

technical field [0001] The invention relates to a large and medium-sized winding type asynchronous motor starter, in particular to a fully enclosed liquid resistance starter. Background technique [0002] At present, in order to improve the starting performance of large and medium-sized wound asynchronous motors, the more popular method is to use a liquid resistance starter; it uses a liquid resistance in series in the motor rotor circuit to automatically adjust the resistance value steplessly, so that it changes from large to small. The small value is zero at the end, which realizes the smooth start of the motor without impact. This product overcomes many disadvantages of traditional starters such as large starting current, inconvenient operation, frequent maintenance, non-continuous starting, large mechanical impact, etc., and completely solves the problem of difficult starting of large and medium-sized motors. However, the current liquid resistance starter still has the ...

AI Technical Summary

Problems solved by technology

This product overcomes many disadvantages of traditional starters such as large starting current, inconvenient operation, frequent maintenance, non-continuous starting, large mechanical impact, etc., and completely solves the problem of difficult starting of large and medium-sized motors.

However, the current liquid resistance starter still has the following deficiencies: 1. When starting, the electrolyte temperature rises greatly, and it is difficult to start repeatedly in a short period of time by relying on natural heat dissipation; 2. The electrolyte tank is not sealed enough, due to the The electrolyte in the medium is heated, and the water evaporates. In addition to the volatilization of water under normal conditions, the liquid resistance starter needs to be repeatedly added with water after a period of use, resulting in frequent equipment maintenance and a decline in effective use.

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