Automatic cylinder opening device and method for steam turbine cylinder

Abstract

The invention relates to an automatic cylinder opening device and method for a steam turbine cylinder. The automatic cylinder opening device comprises a hydraulic jack, a control unit, a driving loop, a detection unit and a power source; the power source provides ascending or descending power for the hydraulic jack according to driving control of the driving loop; the driving loop controls and drives the power source according to a control signal or an adjusting signal output by the control unit, and controls the load and the speed of the hydraulic jack when the hydraulic jack ascends or descends; the detection unit monitors the running state of the hydraulic jack in the ascending or descending process and outputs a feedback detection signal in the ascending or descending process of the hydraulic jack; and the control unit receives the feedback detection signal output by the detection unit, and outputs the adjusting signal to the driving loop according to the feedback detection signal, or outputs the control signal to the driving loop according to a received operation signal. According to the device and method, power is provided for the hydraulic jack, the precision is high, the cylinder opening time is short, and the efficiency is high.

Description

technical field [0001] The invention relates to the field of steam turbine maintenance, and more specifically relates to a steam turbine cylinder automatic cylinder opening device and method. Background technique [0002] The dynamic and static fit clearance inside the high (middle) cylinder of the steam turbine is small. During the operation of the cylinder, in order to avoid the collision of the dynamic and static parts in the cylinder as much as possible, it is necessary to set up a group of hydraulic jacks at the four corners of the cylinder to raise the upper half of the cylinder. Separate a certain distance from the middle facet of the lower half of the cylinder, and then hoist the cylinder away with a crane. The current cylinder jacking process is to arrange two people at each of the four corners of the cylinder. One person is responsible for monitoring the jack and using a steel ruler to measure the jacking height of the upper half of the cylinder; the other person i...

AI Technical Summary

Problems solved by technology

However, due to many reasons such as noisy working environment, low measurement accuracy of the steel ruler, and different loads at the four corners of the cylinder block, there is often a deviation in the jacking height of the four corners of the cylinder block. Stuck in some places

In addition, the current cylinder jacking process usually takes 6-8 hours for each operation due to the large number of operators, the invisible separation of personnel by the cylinder, and the high coordination requirements of each post.

Long time and low efficiency

Images