Quantitative research and study method of inner and outer spacer rings of precision shafting unit

Abstract

The invention relates to a quantitative research and study method of inner and outer spacer rings of a precision shafting unit. A tested bearing and an inner spacer ring are installed at a centering mandrel of a shafting pre-tightening force measuring device; a rated pre-tightening force is applied to the tested bearing; a displacement sensor installed at the shafting pre-tightening force measuring device measures a relative displacement value of the centering mandrel under the rated pre-tightening force, wherein the relative displacement value is used as a reference value; an outer space ringreplaces the inner space ring, loading of rated pre-tightening forces with the same values is repeated, and the relative displacement value of the centering mandrel is measured as a comparison value;and then the comparison value and the reference value are compared to obtain a quantitative research and study amount of the inner space ring or outer spacer ring. According to the invention, preciseresearch and study amounts of the inner spacer ring and the outer spacer ring of the tested bearing under needed axial loads are measured quickly and quantitatively, so that the heights of the spacerrings are adjusted quickly and a qualified shafting product is installed.

Description

technical field [0001] The invention belongs to the technical field of positioning and pretightening of a shaft system, and relates to a method for quickly repairing inner and outer spacers of a precision shaft system. Background technique [0002] A certain axial load must be applied to the precision shafting under normal working conditions. The preload of the shafting assembly is a very critical parameter of the shafting quality, and its accuracy directly affects the performance of the matching bearing and even the main engine. Its main purpose is to improve the rotation accuracy of the entire shafting system, reduce the sliding of rolling elements at high speed, improve the support rigidity of the shafting system, reduce the axial and radial movement of the bearing, improve the running damping of the shafting system, and reduce the Shafting noise and improving the service life of bearings, etc. Generally, there are two ways of preloading in the shafting: constant pressur...

AI Technical Summary

Problems solved by technology

In this way, the number of times and time required for a batch of precision shafting to be measured and repaired is greatly lengthened, because it is not directly quantitatively measuring the repairing amount of this type of precision shafting. Taking back-to-back installation as an example, there are often inner spacers The phenomenon that the outer spacer needs to be repaired due to excessive size repairing

These two methods of detecting bearing protrusion are time-consuming and laborious, and the accuracy cannot meet the production needs of modern enterprises, let alone mass production

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