Axial positioning device for steam turbine low-pressure end outer vapor seal

Abstract

The invention relates to a steam turbine vapor lock axial location device, in particular to the axial location device for the vapor lock outside the low-pressure side of a steam turbine and the vapor lock of a rotor. The vapor lock axial location device used outside of the low-pressure side of the steam turbine comprises a dummy bearing, a dummy shaft, a shaft sleeve, an anchor ear and a positioning arm; the dummy bearing comprises a left bearing and a right bearing which are arranged on a cylinder, the two ends of the dummy shaft are transversely placed on the dummy bearings, a left shaft sleeve and a right shaft sleeve and the anchor are sleeved on the dummy shaft, the left shaft sleeve and the right shaft sleeve are arranged at both sides of the anchor ear respectively, the anchor and the shaft sleeve can make axial movement along the dummy shaft; the positioning arm comprises a positioning arm and a locating plate, one end of the positioning arm is connected with the end face of the anchor ear, the other end is provided with a movable locating plate, the positioning arm is vertical to the axis lead of the dummy shaft. The invention can adjust the axial direction and the radial position to simulate the low-pressure rotors of different sets, precisely locate the axial position of the vapor lock outside the low-pressure end and the rotor vapor lock; also, the invention has simple structure and strong versatility.

Description

Technical field [0001] The invention relates to an axial positioning device for the steam seal of a steam turbine, in particular to an axial positioning device for the outer steam seal and the rotor steam seal of the low pressure end of the steam turbine. Background technique [0002] During the assembly process of the steam turbine unit, the axial position of the outer steam seal at the low-pressure end of the steam turbine and the rotor steam seal must not only conform to the "K" value dimension of the unit design, but also the axial size of the steam seal and the rotor steam seal. The K value refers to the axial dimensions of the inlet side of the first-stage left-handed rotor of the low-pressure rotor and the outlet side of the first-stage left-handed stator of the low-pressure rotor. [0003] When the low-pressure end outer steam seal body is processed, the axial margin must be left in the final assembly, according to the actual installation size of the low-pressure rotor ax...

AI Technical Summary

Problems solved by technology

If the processing of the low-pressure rotor cannot keep up with the assembly cycle, there is no low-pressure rotor in the assembly, and the axial position of the outer seal of the low-pressure end and the seal of the low-pressure rotor cannot be correctly determined

Therefore, the outer steam seal at the low-pressure end cannot be processed and installed, and the final assembly of the entire unit cannot be completed, which greatly affects the progress of the final assembly of the unit.

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