Experiment table for studying friction mechanism of precision ball screw pair

Abstract

An experiment table for studying the friction mechanism of a precision ball screw pair comprises a ball screw pair, and a torque sensor connected with the screw for acquiring the friction torque of the ball screw pair, wherein the ball screw pair includes a flange-type nut, a screw support and an axial sliding support respectively arranged on both ends of the screw, one end of an axial force sensor is connected with one end of the screw on the same side of the axial sliding support; the other end of the axial force sensor is connected with the piston rod of an oil cylinder; an angular contact bearing is sheathed on the flange-type nut; a connection block is arranged on the outer side of the angular contact bearing; an axial sliding support is connected with the connection block; a motor is placed on the axial sliding support; the power output of the motor is transmitted to the flange-type nut through a belt drive device; and the flange-type nut, the inner ring of the angular contact bearing and the driven wheel of the belt drive device are fixedly connected with one another.

Description

technical field [0001] The invention relates to an experimental platform for researching the friction mechanism of a precision ball screw pair. Background technique [0002] The friction torque of the ball screw refers to the resistance torque formed by various friction factors on the movement of the ball screw. It reflects the system response of the ball screw friction and is an important performance parameter of the ball screw. With the continuous improvement of the performance of the ball screw, the friction torque has become the main obstacle to the development of its high precision and high speed. Excessive friction torque reduces the transmission efficiency, and its extremely unstable performance affects the positioning accuracy of the ball screw. It directly causes energy loss and temperature rise. Excessive temperature rise produces thermal deformation that affects positioning accuracy, and aggravates wear and reduces lubrication. As a result, the service life of th...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problems existing in the existing ball screw pair friction torque testing technology, and provides an experimental platform with high measurement accuracy that can be used for research on the friction mechanism of ball screw pairs under high-speed and high-load conditions.

Images