Water-turbine generator set air gap measuring device and use method thereof

Abstract

The invention discloses a water-turbine generator set air gap measuring device and a use method thereof, and belongs to the technical field of water-turbine generator set detection. Comprising a hollow measuring shell, a dial indicator, a sliding block, a movable rod, a first measuring rod, a second measuring rod and a measuring operation rod, the measuring shell serves as a main carrier, the dial indicator, the sliding block, the movable rod, the first measuring rod, the second measuring rod and other main parts are integrated, operation control is conducted through the measuring operation rod, the measuring shell can be perpendicularly inserted into an air gap of the water-turbine generator set, and the measuring shell can be suitable for measurement of all measuring point positions; the method is high in measurement precision, simple to operate and high in efficiency. Through the connection relation of all the parts, the air gap which cannot be directly read is directly and correspondingly read through the reading of the dial indicator, and errors are avoided.

Description

technical field [0001] The invention belongs to the technical field of hydraulic generator set detection, and in particular relates to an air gap measuring device for a hydraulic generator set and a method for using the same. Background technique [0002] With the continuous adjustment of the energy structure, hydropower energy has become an important part of building a modern, multi-functional and complementary smart energy system with coordinated supply and demand. A hydro-generator is a generator that converts water energy into electrical energy with a hydro-turbine as the prime mover, and is widely used in the field of hydropower generation. During installation or maintenance, the air gap between the rotor magnetic pole and the stator core should be measured to ensure that the air gap is distributed as evenly as possible. The accuracy of the air gap measurement results directly affects the stable operation of the hydro turbine generator set. . [0003] In the prior art...

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Problems solved by technology

[0003] In the prior art, the measurement of the air gap of the hydraulic turbine generating set is generally carried out by the wooden wedge pressing method. The principle is to apply chalk dust on the inclined surface of the wooden wedge, then insert it vertically into the air gap between the stator and the rotor, then pull it out, and use a vernier caliper The air gap value of the magnetic pole is obtained by measuring the thickness of the slant plate at the indentation on the wooden wedge, which mainly has the following problems: the wooden wedge indentation method only measures the gap between the magnetic extreme pressure plate and the iron core pressure plate, it does not The actual gap between the rotor and the stator and the air gap at different positions of the stator and rotor cannot be measured, and the measurement accuracy is low; on the other hand, after the wooden wedge is used repeatedly, the measurement error will become larger and larger

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