Generator stator slot wedge tightness test bench

By using a generator stator slot wedge tightness test bench, the tightness of the generator stator slot wedges can be simulated, solving the difficulties of on-site testing of steam turbine generators and realizing slot wedge tightness testing in the laboratory, thus improving research efficiency.

CN116539338BActive Publication Date: 2026-06-09NUCLEAR POWER OPERATIONS RES INST (NPRI)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NUCLEAR POWER OPERATIONS RES INST (NPRI)
Filing Date
2023-04-13
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Fault diagnosis research on steam turbine generators is difficult, and on-site testing is constrained by the unit's operating status and high costs, making it difficult to conduct effective experiments without affecting the normal operation of the power plant.

Method used

A generator stator slot wedge tightness test bench is designed. By simulating the test bench structure and data acquisition, the tightness of the generator stator slot wedge is simulated. The tightness of the slot wedge is adjusted by a manual hydraulic pump and jack, and the deformation of the slot wedge is measured by a dial indicator, so as to realize the slot wedge tightness test in the laboratory.

Benefits of technology

By simulating the stator slot wedge characteristics under different tightness conditions in the laboratory, the tightness of the slot wedge was tested, avoiding the uncertainty and high cost of on-site testing and improving research efficiency.

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Abstract

This invention belongs to the technical field of simulated generator testing environment, specifically relating to a generator stator slot wedge tightness test bench. It includes a base frame, which is connected and fixed to the test bench via a slot structure. The advantages of this invention are: it enables the simulation of the stator slots within a generator in a laboratory setting, allowing for slot wedge tightness testing without on-site visits. This invention uses a test bench that includes slots for four different generator models. The slot wedge dimensions within the slots are consistent with the actual dimensions and structure of the generator. The slots contain slot wedges, corrugated plates, under-wedge pads, side pads, upper rods, and lifting components. This invention can simulate the looseness of the generator slot wedges through the deformation of the corrugated plates. This invention can determine whether the slot wedge tightness meets requirements by measuring the displacement of the slot wedge after it is pressed radially downwards.
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