Circumferential pull rod stretching device

Abstract

The invention discloses a circumferential pull rod stretching device. The circumferential pull rod stretching device comprises a connecting ring, twelve connecting rods and a pressure pump, wherein the twelve connecting rods are evenly distributed on the end surface of the connecting ring in the circumferential direction and penetrate through the upper end surface and the lower end surface of the connecting ring, and an inner threaded hole identical to a circumferential pull rod in size is formed in the bottom of each connecting rod; the top of each connecting rod is connected with the bottom of a shell in a sealed manner, the top of each connecting rod is fixedly connected with a rotating part, an opening is formed in the top of each shell, a partition plate is arranged in each shell, is connected with the inner wall of the shell in a sealed manner, is fixedly connected to the top of the corresponding connecting rod and located below the corresponding rotating part, and an oil inlet is formed in the position, below the partition plate, of each shell; and the pressure pump is connected with the oil inlet of each shell. The pre-tightening force can be applied to all circumferential stay bolts at the same time, so that the number of workers needed in the traditional pre-tightening force applying process is effectively reduced, and the operation process is simplified.

Description

technical field [0001] The invention belongs to the field of mechanical fixing, and relates to a circumferential pull rod stretching device. Background technique [0002] Due to the advantages of light weight, fast start-up, good thermal expansion performance and easy assembly of tie-rod rotors, manufacturers of heavy-duty gas turbines generally adopt tie-rod rotor structures. Rod-type rotors are divided into center-rod and circumferential-rod rotors. Among them, the circumferential tie-rod rotor is favored by most gas turbine manufacturers because it does not require complex end teeth between the discs, which reduces the difficulty of processing and manufacturing. At the same time, multiple tie rods can improve the overall safety of the rotor and other advantages. [0003] The circumferential tie rod rotor tightly presses the multi-stage discs together through a plurality of circumferential tie rod bolts (generally 12), and the discs are in plane contact. During the assem...

AI Technical Summary

Problems solved by technology

[0004] Since the twelve tie-rod bolts of the gas turbine are distributed along the circumference, in order to ensure that the applied pre-tightening force is consistent, it is necessary to apply pre-tightening force to the twelve tie-rod bolts at the same time as much as possible. Many workers cooperate in operation, and how to ensure the uniform force of the twelve tie rod bolts depends entirely on the experience of the workers, which has high requirements for the operators and takes a long time

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