RU190767U1 - RADIAL HYDRODYNAMIC BEARING OF SLIDING LIQUID FRICTION - Google Patents

Abstract

The utility model relates to the field of mechanical engineering, in particular, to designs of radial hydrodynamic bearings of fluid friction and can be widely used in various industries to ensure reliable and durable equipment operation. Radial hydrodynamic sliding bearing of fluid friction contains sleeve 2 with shaft 1 installed in it. the rotation of the shaft 1, installed in the sleeve 2, a lubricating fluid flows into the cavity between them. During operation, the shaft acts hydrodynamically The maximum force combined with the load P causes the axis and eccentricity of the shaft and sleeve to be “e” at point 0. As a result, the minimum thickness of the lubricant layer between shaft 1 and sleeve 2 in the direction of displacement “e” decreases. 1 parallel to its axis, grooves 3, like vane machines, allow you to capture a greater amount of lubricating fluid, thereby creating a hydrostatic force P. Generated hydrodynamic forces prevent the free flow of lubricating fluid along the edges of the sleeve 2 thereby increasing h, which allows the shaft 1 to float on the oil film and operate under liquid friction, which as a result increases the damping ability of the lubricant layer. As a result of the application of the utility model, the damping ability of the lubricant layer is increased.

Description

The utility model relates to the field of mechanical engineering, namely, to designs of radial hydrodynamic bearings of fluid friction and can be widely used in various industries to ensure reliable and durable equipment operation.

As a prototype of the selected radial hydrodynamic sliding bearing of friction, containing the shaft and covering its sleeve [Kondir D.S. "Contact hydrodynamics of machine parts", M .: Mashinostroenie, 1976, pp. 12-16].

The disadvantages of the known designs of a hydrodynamic friction-sliding bearing are the limited capabilities of the damping lubricant layer.

The purpose of the utility model is to increase the damping capacity of the lubricating layer.

This goal is achieved by the fact that in the radial hydrodynamic sliding bearing of liquid friction, containing the shaft and the sleeve surrounding it, according to the utility model, grooves are made on the rubbing surface of the shaft parallel to its axis grooves whose length is less than the sleeve length.

The utility model is illustrated by drawings, in which a radial hydrodynamic fluid-friction bearing is shown: FIG. 1 is a longitudinal section of the bearing; FIG. 2 is a section A-A in FIG. one.

The list of positions and designations in the drawings:

1 - shaft;

2 - sleeve;

3 - grooves;

ω is the angular velocity;

P - external force;

P _max - balancing hydrodynamic force;

h _min - the minimum thickness of the lubricant layer;

0 ₁ - the axis of the shaft at rest;

0 ₂ - the axis of the shaft at the time of work;

e - the displacement of the shaft.

Radial hydrodynamic friction sliding bearing includes a sleeve 2 with shaft 1 installed in it.

The work of the hydrodynamic friction sliding bearing is as follows.

In the static position, the radial hydrodynamic fluid-friction bearing experiences a load P under the action of gravity, and the shaft axis is located at the point 0 ₁ .

During the rotation of the shaft 1 installed in the sleeve 2, a lubricating fluid enters the cavity between them.

In the process of operation, a hydrodynamic force acts on the shaft, which, together with the load P, leads to the displacement of the axis and eccentricity of the shaft and sleeve by the distance “e” to the point 0 ₂ .

As a result, the minimum thickness of the lubricating layer h _min between the shaft 1 and the sleeve 2 in the direction of displacement "e" decreases.

The grooves 3, which are made on the shaft 1 parallel to its axis, make it possible, like a blade machine, to capture a larger amount of lubricating fluid, thereby creating a hydrodynamic force P _max .

The created hydrodynamic forces prevent free flowing of the lubricating fluid along the edges of the sleeve 2, thereby increasing h _min , which allows the shaft 1 to float on the oil film and work under fluid friction conditions, which as a result increases the damping capacity of the lubricating layer.

The result of applying the utility model is to increase the damping capacity of the lubricating layer.

Claims (1)

Radial hydrodynamic friction bearing bearing, containing the shaft and the sleeve surrounding it, characterized in that on the rubbing surface of the shaft parallel to its axis are grooves that are shorter than the sleeve.

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