Journal roundness tester

Abstract

The invention discloses a shaft neck roundness tester. The shaft neck roundness tester comprises a testing circular ring, three dial indicator supports arranged into trisection around an axis of testing circular ring, dial indicators arranged in the dial indicator supports and a raised handle arranged on the external surface of the testing circular ring, wherein the dial indicator supports are in shaft sleeve shapes, a connection part at the bottom of the tester is connected with a through hole which is formed in the external surface of the testing circular ring, and the external surface of the testing circular ring is exposed at the upper end of the tester and a threaded hole which is connected with an inner hole is formed in a side wall of the tester; a bolt is internally screwed in the threaded hole, sleeves at the bottom of the dial indicators are stretched into the inner holes of the dial indicator supports, measuring heads which are located at the ends of measuring rods in the sleeves are in flush with the internal surface of the testing circular ring, and the sleeves are fixed by bolt spinning. The shaft neck roundness tester is simple in structure, easy to operate, low in cost and easy to carry; and the accurate, qualitative and quantitative measurement of roundness and cylindricity of excircle of the shaft neck can be realized when the operation is carried out in a high altitude environment condition.

Description

Technical field [0001] The invention relates to a detector for the roundness of the outer journal of a rotor shaft of a wind generator. Background technique [0002] For the detection of large shaft journal shape and position tolerances, three-coordinate instruments, laser trackers, etc. are generally used, but such instruments are large in size and high in price. It is inconvenient to use cranes to lift workpieces during measurement, especially at high altitudes. Wind turbines above 80 meters cannot be detected at all when they are rotating. [0003] Since the cylindricity of the bearing gear is too poor when processing the rotating shaft, abnormal noise or vibration of the motor will occur during operation, and long-term operation will affect the life of the bearing. Summary of the invention [0004] Aiming at the deficiencies of the prior art, the present invention provides a journal roundness detector which is convenient to detect the high and low point data of the shaft surfac...

AI Technical Summary

Problems solved by technology

[0002] For the detection of the shape and position tolerance of large-scale shaft journals, three-coordinate instruments, laser trackers, etc. are generally used, but such instruments are large in size and expensive, and it is very inconvenient to use a crane to lift the workpiece during measurement, especially at high altitudes for maintenance. It is impossible to detect the shaft of the wind turbine above 80 meters

[0003] Because the cylindricity of the bearing gear is out of tolerance when processing the rotating shaft, it will cause abnormal noise or vibration of the motor during operation, and long-term operation will affect the life of the bearing.

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