Double-screw double-screw ball screw life comparison test bench

Abstract

The invention relates to a double-layer double-screw type lifetime contrasting testbed of ball screw assemblies. The double-layer double-screw type lifetime contrasting testbed comprises a bed body, a lead rail which is fixed on the bed body, a slide block which is mounted on the lead rail and is capable of sliding, a front support, a working table, a rear support, an upper left load ball screw assembly, an upper right load ball screw assembly, a lower left drive ball screw assembly, a lower right drive ball screw assembly, a radial acceleration sensor which is used for measuring vibration signals of the ball screw assembly and a temperature sensor which is used for measuring the temperature change of nuts of the ball screw assembly. The double-layer double-screw shaft structure enables the number of the screws to be tested to be increased, enables the device space to be shortened, enables the lifetime testing efficiency to be greatly improved, is convenient to precisely measure the temperature increase of the ball screw assembly after running in, and is convenient to judge whether a ball circulation reversing gear is firm, whether a sealing ring is firm, is deformed and is staggered, and whether the dynamic no-load pre-tightening torque of the ball screw assembly still conforms to the drawing requirements and so on.

Description

technical field [0001] The invention relates to a life test device of a lead screw pair, in particular to a double-lead screw type ball screw pair life comparison test bench. Background technique [0002] The lead screw pair refers to the screw transmission part composed of the lead screw and the nut. As the common transmission part of the mechanical system, the lead screw pair is widely used in various machinery and equipment. Therefore, real-time monitoring and evaluation of the performance degradation status and remaining life of the screw pair and guide rail pair is conducive to establishing a reasonable and effective maintenance plan, reducing unnecessary downtime and saving a lot of maintenance costs. There are several loading methods of the existing lead screw pair life test bench: [0003] The first method: use springs to achieve, but the spring is not a constant force in the process of elongation and compression, and at the same time, the elongation or shortening o...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a double-screw double-screw type ball screw pair life comparison test bench for the shortcomings of the existing technology, such as the small number of experimental screws, the difficulty in applying simulated loads, and the long test period.

Images