Bearing contact angle measuring instrument

Abstract

The invention relates to a bearing contact angle measuring instrument which mainly comprises a loading mechanism, a positioning driving mechanism and a measuring control portion. Loads can be applied onto inner rings of a measured bearing by the loading mechanism, outer rings of the measured bearing can be directly driven by the positioning driving mechanism, the rotational speeds of the outer rings can be controlled by an industrial computer, the rotational speeds of cages can be measured by a laser displacement sensor, and contact angles of the bearing can be computed by the aid of relations among the rotational speeds of the outer rings of the measured bearing, the rotational speeds of the cages and the contact angles of the bearing. The bearing contact angle measuring instrument has the advantages that the contact angles of the bearing can be accurately measured, and the bearing contact angle measuring instrument is simple in structure, convenient to operate and high in reliability and repeat accuracy and is an automatic bearing contact angle measuring instrument.

Description

technical field [0001] The invention relates to a bearing contact angle measuring instrument, which belongs to the technical field of bearings. Background technique [0002] Bearing contact angle is an important structural parameter of angular contact ball bearings. Contact angle is an important parameter to measure the performance of angular contact bearings. Its value determines the axial and radial bearing capacity of the bearing. A large number of theoretical studies and experiments have proved that for precision spindle angular contact ball bearings, especially paired bearings, the size and consistency of the contact angle value will directly affect the stiffness, rotation accuracy and service life of the entire shaft system. [0003] From the bearing geometry, the ball bearing contact angle There are the following geometric relationships with the original radial clearance (design clearance): [0004] [0005] where: G r is the original radial clearance of the b...

AI Technical Summary

Problems solved by technology

[0017] 1. The transmission chain is too long, the transmission stability is not good, the bearing rotation stability is not good, the measurement repeatability is not good, and the bearing under test is easy to be damaged;

[0018] 2. The lever, cam and weight are jointly loaded, the loading force is offset from the center line of the bearing, and the inner and outer rings of the bearing are prone to yaw angle, which affects the measurement accuracy and is easy to damage the bearing under test;

[0019] 3. The light emitted by the photoelectric sensor hits the bearing cage under test too much. The photoelectric sensor can only measure about one rotation of the bearing cage under test, but it is not very accurate. The measurement error is large, and it cannot measure miniature bearings and bearings. Bearings with high precision requirements

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