DE10048708A1 - Bearing for the shaft of an open-end spinning rotor has a cylindrical bearing bush with spaced races and a row of roller bearings at each race with at least one bearing body of silicon nitride and the remainder of steel for a longer life - Google Patents

Abstract

The bearing for a component with high rotary speeds, and especially for the spinning rotor of an open-end spinner, has a cylindrical bearing bush (2) for the rotor shaft (1) with a pair of spaced steel races. Each race has a row of roller bodies (3) in a cage (4). In each row, at least one roller (3) is of silicon nitride (Si3Ni4), and the remaining roller bodies (3) are of steel. In each row of roller bodies (3), there are fewer rollers of Si3Ni4 than roller bodies (3) of steel.

Description

Field of application of the invention

The invention relates to a high-speed bearing, especially for Bearing of the spinning rotor of an open-end spinning machine containing a shaft and a cylindrical bushing, both with a pair of spaced apart steel orbits located from each other, in each of which a series of Rolling elements guided by a cage is arranged.

Characteristic of the known technical solutions

High-speed bearings are known, especially for mounting the spindle one Open-end spinning machine containing a steel shaft with a pair of im Spaced orbits and a steel cylindrical Bearing bush, also with a pair of equidistant from each other located orbits. There are steel cages in the orbits guided steel rolling elements.

The disadvantage of this arrangement is that at high speeds Orbits overused by relatively heavy steel rolling elements the life of the bearing is considerably reduced.

To remedy this defect, the solution was developed according to CZ patent no. 281 421 proposed. It refers to a high-speed warehouse, especially for a spinning machine containing a shaft with a pair of at a distance steel orbits located from each other and a cylindrical one Bearing bush, also with a pair of spaced apart steel orbits. There are metal cages in the orbits guided rolling elements made of technical ceramics.  

The relative advantage of this arrangement is the long life of the Storage at high speeds, but due to the high purchase price of one such stock is bought because a large number of very expensive dimensionally accurate ceramic rolling elements must be used.

The invention aims at a high-speed bearing, especially for storing the Spinning rotor of an open-end spinning machine with sufficient service life and to propose a lower purchase price.

Principle of the invention

The aim of the invention is achieved by a high-speed bearing, especially for mounting the spinning rotor of an open-end spinning machine, the principle of which is that in each row of the rolling elements at least one of the rolling elements made of silicon nitride Si ₃ N ₄ while the other rolling elements Steel are produced, the number of rolling elements made of silicon nitride Si ₃ N _{4 being} smaller than the number of rolling elements made of steel in each row of the rolling elements.

This arrangement of the high-speed bearing, especially for storage of the spinning rotor of an open-end spinning machine, a price reduction is achieved of the bearing while maintaining its sufficient lifespan at high Speeds.

Overview of the pictures

The invention is shown schematically in the drawing, the one Longitudinal section through the high-speed bearing for the storage of the spinning rotor Represents open-end spinning machine.

Embodiments

The high-speed bearing, especially for supporting the spinning rotor of an open-end spinning machine, contains a shaft 1 and a cylindrical bush 2 , both with a pair of steel orbits located at a distance from one another, in each of which a series of by a cage 4th guided rolling elements 3 is housed. The socket 2 carries a seal 5 on both ends and is provided on its outer surface with a clamping ring 6 .

In each row of the rollers 3 is a part of the rolling elements 3 is made of steel and the other part (the rolling elements 3 in each row of the rolling elements 3) of silicon nitride Si ₃ Ni _4, wherein in each row of the rolling elements 3, the number of the rolling elements 3 of Silicon nitride Si ₃ Ni _{4 is} smaller than the number of rolling elements made of steel, that is, the value of the ratio of the number of rolling elements 3 made of silicon nitride Si ₃ Ni ₄ to the number of rolling elements 3 made of steel is less than 1. In each row of the rolling elements 3 there is at least one rolling element 3 made of silicon nitride Si ₃ Ni ₄ and at least two rolling elements 3 made of steel.

From the point of view of the dynamic effects of the rotating masses, it is appropriate to regularly distribute the rolling elements 3 from the individual materials in each row of the rolling elements 3 on the circumference of the orbits.

Claims (1)

1. High-speed bearing, especially for supporting the spinning rotor of an open-end spinning machine, containing a shaft and a cylindrical bearing bush, both with a pair of spaced-apart steel orbits, in each of which a series of rolling elements guided by a cage are arranged is characterized in that in each row of the rolling elements ( 3 ) at least one of the rolling elements ( 3 ) is made of silicon nitride Si ₃ N ₄ and the other rolling elements ( 3 ) are made of steel, the number in each row of the rolling elements ( 3 ) the rolling element ( 3 ) made of silicon nitride Si ₃ N _{4 is} smaller than the number of rolling elements ( 3 ) made of steel.