Install the radial support and axial preload structure of bearing motor rotor dynamic balance measurement

Abstract

The invention discloses a radial supporting and axial pre-tightening structure for dynamic balance measurement of a motor rotor provided with a bearing. The motor rotor is mounted on a rotor bearing radial support structure in a supported manner for radial support, a rotor bearing axial pre-tightening structure mounted on the rotor bearing radial support structure is used for axial pre-tightening, the rotor bearing radial support structure makes point contact with a cylindrical surface in the outer ring of the motor rotor bearing via tungsten steel bars in bar-shaped grooves of radial support frames at two sides, the rotor bearing axial pre-tightening structure comprises a baffle plate mounted at the outer side surfaces of the radial support frame at the bearing limiting side and an axial pre-tightening assembly mounted at the radial support frame at the bearing abutting side, the baffle plate limits the bearing at one end of the motor rotor in the axial direction, and the axial pre-tightening assembly pre-tightens the bearing at the other end of the motor rotor in the axial direction. The radial supporting and axial pre-tightening structure improves the consistency and stability of the pre-tightening state during dynamic balance measurement of the motor rotor provided with the bearing, the fluctuation degree of dynamic balance measurement of the motor rotor is reduced, and the repeatability and reproducibility of measurement are improved.

Description

technical field [0001] The invention relates to a radial support and axial pretightening structure, in particular to a radial support and axial pretightening structure for the dynamic balance measurement of a motor rotor with installed bearings. Preload. Background technique [0002] The motor is an important production and daily necessities, and the rotor is an important working part of the motor. In the production process of the rotor, due to reasons such as unreasonable design, uneven material, and processing and assembly errors, there is inevitably an initial imbalance. The rotor with excessive unbalance will generate vibration and noise during the operation of the motor, which will degrade the performance of the motor in light cases, and cause damage and accidents in severe cases. Therefore, the rotor must be dynamically balanced to maintain the unbalanced amount at within the qualified range. [0003] Rotor dynamic balance correction equipment can be divided into tw...

AI Technical Summary

Problems solved by technology

However, this structure has great disadvantages. First, the structure has high requirements on its own processing technology. When the cylinder is pressed, the two thrust pins must be supported on the end face of the bearing outer ring at the same time. Once there is a processing deviation or assembly deviation, It is easy to make the thrust pin on one side hang in the air, so that the preload force on one side cannot be transmitted, the force on both sides of the bearing is too different, and the measurement data is unreliable

Images