Novel shaft sleeve for textile machinery

Abstract

A novel shaft sleeve for textile machinery comprises a mandrel, a bearing shell, a conical inner ring, a stepped sleeve, a seal, a group of balls spaced and positioned by a retainer, another group of pin rollers axially positioned by a pin roller positioning ring, and the like. The group of balls and the group of pin rollers are used as a rolling part, an end of the mandrel close to the middle stress part of the mandrel is modified into a cylinder structure, the shaft end then extends to two ends to form cones, the conical inner ring is matched with the corresponding cone, the stepped sleeve outside the cylinder of the shaft end is in transition fit with the cylinder, and the stepped sleeve and the corresponding inner ring are in interference fit to form a fully closed structure. By means of the modification, the problem of axial endplay of the mandrel is solved, the problem of radial stress of the mandrel is also solved, tensile strength of the modified shaft end is improved, and bending formation is avoided. The balls and the pin rollers of the rolling part are constantly soaked into grease fully closed to rotate, and accordingly the problem of heat generated by the rolling part at high speed is solved, the novel shaft sleeve is applicable to drawing frames and combing machines for high-speed output, and thickness uniformity quality of cotton silvers is improved greatly.

Description

technical field [0001] The invention relates to a new shaft sleeve for textile machinery. Background technique [0002] The shaft sleeves widely used in the cake machine and combing machine in textile machinery are the key components that determine the draft and traction quality of the sliver when pulling the sliver. The thickness and uniformity of the sliver depend on its quality. Therefore, There are high requirements on the rationality of the shaft sleeve structure design, the precision of the manufacturing quality and the sealing performance. In view of the existing shaft sleeve technology, it is easy to heat and burn hands, easy to leak oil, and the internal grease overflows to pollute the rubber roller and sliver. , make the bearing lose oil and wear, and then wear the mandrel, affect the quality of the sliver and other defects. The Chinese patent application number 200420110563.8 is named "Special Bushing for Textile Machinery". The steel ball structure separated an...

AI Technical Summary

Problems solved by technology

However, it has been proved by practice that the improved shaft sleeve still cannot meet the requirements of continuous increase in the output speed of the biscuit machine and comber. For example, the output speed of the biscuit machine is increased from 200m / min to 600m / min, and the highest has reached 800-1000m / min min, the speed of the comber increased from 160 nips / min to 400 nippers / min, the high-speed textile machinery is the development trend, but the current shaft sleeve still stays at the 200m / min speed level of the cake bar output in the 1960s. Increase the speed, the shaft sleeve will still have defects such as heat leakage, shaft head wear, bending deformation, large axial movement of the mandrel, which is only barely suitable for low-speed cake and combing machines, otherwise it will be due to the axial movement of the mandrel 1. The poor radial force of the steel ball affects the quality of the sliver. The thickness uniformity and fiber value of the sliver are not ideal. The fiber value of the sliver produced by the existing shaft sleeve is shown in Table 1 by Uster statistics.

Images