SU1733752A1 - Method for assembling bearing seal - Google Patents

Abstract

The invention relates to the repair of movable joints and can be used to restore ball joints of tractor linkage mechanisms. The goal is to expand the range of parts to be repaired, to increase the performance of restoring moving parts by eliminating the disassembly of parts after surfacing, while at the same time increasing durability. Restoration of parts is carried out as an assembly by filling the developed gap with a weld. In order to avoid the mating of the mating surfaces, one of them is coated with a separator material based on graphite, which later in the process of operation plays the role of lubricant. The elimination of disassembly after restoration creates the possibility of repairing the surfaces of the ball joints, which after recovery become non-separable. 3 il.

Description

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The invention relates to methods for assembling roller bearings with a rubber-metallic seal.

A known assembly method involves installing a seal on the end of a bearing with the subsequent application of an axially directed force using a pressure element.

The method does not provide technological elimination of defects when assembling rolling bearings with rubber-metal seals of types 160000 and 180,000, since due to the significant axial force when a seal is inserted into the bearing groove, a part of rubber seals occur from the part (3-4%) metal reinforcement, and this defect remains hidden because insertion of the seal is the last assembly operation.

The purpose of the invention is to improve the reliability of the seal when assembling a bearing with a rubber-metal seal.

This goal is achieved by the fact that according to the method of installing a seal on the end of a bearing with subsequent application of an axially directed force using a pressure element, an additional radially directed force is simultaneously applied to the seal along with the axial force by moving the bearing with a seal and forcibly rotating the pressure roller towards one another at a given speed. FIG. 1 shows schematically an embodiment of the method; in fig. 2, 3 - assembly operations.

A device for carrying out the method is made (FIG. 1) in the form of a movable casing 1 having its own drive (not shown), the cage bears the bearing 2,

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placed in the opening of the yoke 1 together with the seal 3. Above the yoke 1 is installed with the possibility of forced rotation from its own drive (not shown) pressure roller 4 with an elastic coating 5. The distance between the bottom of the hole of the yoke 1 and the periphery of the elastic coating 5 of the pressure roller 4 and 10 - 15% less than the height of the bearing 2, which provides the tension of the elastic coating 5 of the pressure roller 4 when the bearing passes under the pressure roller 4.

The method is carried out as follows.

A seal 3 is placed on the bearing 2, then the sleeve 1, driven by its own drive bearing 2, is fed at a certain speed towards the pressure roller 4, the roller is forced to turn rotation from its own drive (not shown) with a peripheral speed, the linear value of which is Mg is in the following ratio with speed Vi

Vi 0.9 - 0.95V2.

Due to the tension of the elastic coating 5, when the bearing 2 enters the pressure roller 4, an axially directed force P is applied to the seal 3. Due to the forces of the friction of the pressure roller 4 about the seal 3, subject to different speeds Va Vi, a radially directed force is applied to the seal 3, and as a result, the reaction FI acting on the bearing from the yoke. Thus, under the action of both forces P and F, a seal is inserted into the grooves of the outer and inner rings of the bearing, while a radially directed force presses the seal deep into the grooves and accordingly facilitates insertion by axial force P.

An example implementation of the method of assembly. Bearing assemblies of the type 180201 were assembled in experimental order, with dimensions of D x d x H 32 x 12 x 10 mm.

A seal was placed concentrically on the bearings, then the yoke 1 was fed at a speed Vi of 0.47 m / s, the bearing with the imposed seal against the roller

4, which reported a peripheral speed of V2 0.55 m / min. The ratio of the speeds Vi and V2 was Vi 0.92 / 2, as a result of which when the bearing 2 fell under the roller 4, both axially directed and

radially directed force applied to the seal 3 (the first 2 kgf due to the tension of the elastic coating 5 of the roller 4, the second about 0.5 kgf due to the frictional forces of the roller 4 with the seal 3 subject to the speed difference Vi 0.92V2).

Due to both arising forces, the seal was inserted into the groove of the outer and inner rings at the lowest possible axially directed pressures on the seal edges by pressing the seal edge again with a provided radial force deep into the groove.

The proposed method makes it possible to increase the reliability of the seal by eliminating the occurrence of seal defects after assembly, since the application of additional radial force makes it possible to significantly

decrease (2-2.5 times) of the applied axial force.

Claims (1)

Claim method The method of installing a seal in a bearing, including placing a seal on the bearing face and then applying an axially directed force using a pressure element, is characterized by the fact that, in order to improve the quality of the installation of rubber metal seals, an additional radially applied to the latter force by moving the sealed bearing and forcibly rotating the pressure element towards one another. 2 fi.3