RU1784077C - Bearing assembly - Google Patents

Abstract

Usage: in mechanical engineering for the construction of sections of gear turbodrills in drilling. SUBSTANCE: bearing 8 2 7 6 assembly contains two axial rolling bearings 4 and adjusting means of their tension 5 located in the housing 1 with stops and on the shaft 2 by means of power stops 3. In the housing 1 there is a radial radial displacement between the thrust bearings 4 rolling bearing 6. In the housing 1, between the outer ring of the radial bearing 6 and the rings of each thrust bearing 4, intermediate sleeves 7 with stops are installed. Spacer sleeves 8 are placed on the shaft 2 between the inner ring of the bearing 6 and the power stops 3. The tension control means 5 is made in the form of a set of adjusting washers installed between the rings of the thrust bearings 4 and the power stops. 1 ill. 18 4 53 cl С VJ 00 О VI VI СО

Description

The invention relates to techniques for the use of gearboxes and gearboxes specifically for gearboxes designed to change the speed of the output shaft, and can be used in downhole motors to orient vertical and horizontal shafts when drilling oil and gas wells.

A known bearing assembly comprising a housing, a vertical shaft mounted therein, cooperating with a single thrust ball bearing with a lower torus and having a radial ball bearing fixed with a lock nut

A bearing assembly is known, comprising a housing, a horizontal shaft installed in it, having a radial ball bearing located between a locking nut and a power stop bearing a fixed ring of a thrust ball bearing, in which the movable ring is contacted by a tension regulating element located on the housing flange.

A bearing assembly is also known, comprising two axial rolling bearings, an intermediate thrust disk and an adjusting means for tensioning them, arranged in a housing with an abutment and on the shaft by means of bivalent abutments.

A disadvantage of the known device is its fragility. As a result of the axial load varying in the direction of the shaft, axial movements of the shaft support relative to the housing occur. Thus, due to the centrifugal force, a skew of the rings is created and premature wear of the bearing assembly occurs.

The purpose of the invention is to increase durability.

The goal is achieved in that the bearing assembly comprises two axial rolling bearings and axial displacement adjusting means for locating them in the housing between the axial bearings with axial displacement, and a radial rolling bearing; intermediate sleeves installed in the housing between the outer ring of the radial bearing and the rings of each thrust bearing with stops, as well as spacer sleeves placed on the shaft between the bearing inner ring and power stops, while the adjusting tension tool is made in the form of a set of shims installed between the rings thrust bearings and power stops.

The drawing shows a bearing assembly.

The bearing assembly contains placed E housing 1 with stops and on the shaft 2

by means of power stops 3 two thrust rolling bearings 4 and adjusting means of their tension 5, located in the housing 1 between the thrust bearings 4 with the possibility of significant axial movement, a radial rolling bearing 6 installed in the housing 1 between the outer ring of the radial bearing 6 and the rings of each thrust 4 intermediate bushings 7 with stops, as well as spacer bushings 8 located on the shaft 2 between the inner ring of the bearing b and the power stops 3, while the means of adjusting tension 5 is made a set of shims, ustanovlen0 GOVERNMENTAL between the rings of thrust bearings 4 and 3 stops power.

The bearing assembly operates as follows.

When the shaft 2 rotates, the power stops 3 and the associated thrust bearing rings 4, spacer sleeves 8, and the inner rings of the radial bearing 6 rotate together with it.

Fixed when rotating shaft 2

0 remain: intermediate sleeves 7 with stops, thrust bearing rings 4 in contact with them, and the outer ring of the radial bearing 6. Rotating parts on the shaft and parts stationary from rotation in the housing 5 are axially movable due to the movable radial connection to the housing of the outer ring of the radial bearing 6 and intermediate sleeves 7 with stops.

0 When changing the direction of the axial load acting on the shaft 2, the bearing assembly makes significant axial movements, the magnitude of which depends on the contact length of the outer ring

5 of the radial bearing 6 and the housing 1. With significant axial displacements of the bearing assembly together with the shaft relative to the housing 1, the gaps between the balls and rings of the thrust bearings 4 under

0 by the action of centrifugal forces do not change due to the creation of a preliminary tension between them by means of tightening the adjusting washers 5, creating tight contact between the rings of the thrust bearings 5 of the bearings 4, the power stops 3 and the intermediate sleeves 7 with the stops.

This creates a normal operation of the thrust bearings 4 and ensures their durability. A force feedback

rotating and non-rotating parts

through the power stops 3. mounted on the shaft 2, and the thrust bearings 4 gives the axial displacements of the shaft the relative orientation of the rings of the radial bearing 6, thereby ensuring normal operation and its durability.

Claims (1)

SUMMARY OF THE INVENTION A bearing assembly comprising two thrust rolling bearings and adjusting means for tensioning them, arranged in a housing with stops and on a shaft by means of power stops, characterized in that, in order to increase durability, 0 5 equipped with a radial rolling bearing located in the housing between the thrust bearings, axially movable, mounted in the housing between the outer ring of the radial bearing and the rings of each axial-intermediate bushings with stops, as well as spacer sleeves located on the shaft between the inner ring of the bearing and power stops, the tension control means is made in the form of a set of adjusting washers installed between the thrust bearing rings and the power stops.