A Self-adjusting Device for Bearing Pretightening Force Based on Piezoelectric Ceramic Actuator

A technology of bearing preload and piezoelectric ceramics, applied in transmission parts, manufacturing tools, mechanical equipment, etc., can solve problems such as difficulty in processing intermediate rings, reducing bearing life and rigidity, etc.

Inactive Publication Date: 2016-08-31
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Uneven preload will reduce bearing life and rigidity, and it is difficult to process large diameter intermediate rings

Method used

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  • A Self-adjusting Device for Bearing Pretightening Force Based on Piezoelectric Ceramic Actuator
  • A Self-adjusting Device for Bearing Pretightening Force Based on Piezoelectric Ceramic Actuator
  • A Self-adjusting Device for Bearing Pretightening Force Based on Piezoelectric Ceramic Actuator

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Experimental program
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Embodiment Construction

[0026] The specific implementation method of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] Such as figure 1 As shown, the main shaft 1 adopts a hollow design, and the parts and clamps are installed in the cavity of the main shaft. An angular contact ball bearing 9 with a relatively large diameter is used as a support. The sealing of the main shaft 1 adopts a labyrinth seal. The outer ring 3 of the labyrinth seal is fixed on the main shaft 1 by the hexagon socket head cap screw 2, and the outer ring of the labyrinth seal rotates together with the main shaft. The outer ring 3 of the labyrinth seal and the shoulder of the main shaft 1 fix the inner ring of the bearing. The inner ring 4 of the labyrinth seal is fixed on the installation base 6 through the hexagon socket head cap screw 5, which together with the piezoelectric ceramic actuator 7 fixes the outer ring of the bearing, and during the installation process, ...

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Abstract

The invention relates to an automatic bearing pre-tightening force adjustment device based on piezoelectric ceramic actuators. The device comprises a bearing sealing part, a mounting base(6), adjusting rings (8) and piezoelectric ceramic actuators (7), wherein each piezoelectric ceramic actuator comprises a mounting base (702), a piezoelectric ceramic pile positioning ring (701), a piezoelectric ceramic pile (708), an output shaft (707) and an elastic deformation body (706). Each bearing is circumferentially and uniformly provided with a plurality of actuators for respectively controlling pre-tightening forces of a plurality of positions of the bearing; during a working process, the pre-tightening forces of the plurality of positions of the bearing in the circumferential direction are measured, the piezoelectric ceramic actuators in the corresponding positions are controlled respectively according to measurement values, and proper displacements and forces are output to pre-tighten the bearing. The device realizes real-time bearing pre-tightening force adjustment and meets the requirements of a rotary mechanism on the rotary precision, the rigid and the life of the bearing in different working conditions.

Description

technical field [0001] The invention relates to a self-regulating device for bearing pretightening force in a rotating mechanism, belonging to the field of machinery and control. Background technique [0002] Rolling bearings are generally used in rotating mechanisms as the support for the rotating shaft. For the use of angular contact ball bearings, they must be preloaded to work properly. The pre-tightening force can not only eliminate the axial clearance of the bearing, reduce noise and vibration, but also improve the rigidity of the bearing, so that the rotating mechanism has better rotation accuracy, rigidity, thermal characteristics, etc., thereby improving its service life. [0003] Generally, the greater the preload, the better the effect of improving the rigidity and rotation accuracy of the rotating mechanism; however, the larger the preload, the greater the friction of the steel balls on the raceway, and the higher the temperature rise, it may cause bearing damag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H57/022
CPCB23Q1/70B23Q11/00B23Q17/00
Inventor 孙容磊汪正国
Owner HUAZHONG UNIV OF SCI & TECH
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