SU1716210A1 - Slipping-contact bearing - Google Patents

Abstract

The invention relates to mechanical engineering and can be used in the supports of internal combustion engines, in particular in connecting rod bearings for internal combustion engines. The purpose of the invention is to increase durability. The support contains an insert of two half-sleeves with annular grooves 2 located on their inner surfaces. In the grooves, sealing elements 3 are installed, which are made with a circle of different thickness. Large thickness is located in areas in the direction of the load. The proposed sliding support provides sealing of the load zones, increases the bearing capacity of the support. 2 h. the item f 4, 4 silt:

Description

FIG. 2

The invention relates to mechanical engineering can be used in the crankshaft bearings of internal combustion engines.

A slide bearing is known, comprising a shaft journal and an insert enclosing it of two half-sleeves with annular grooves located on their inner surfaces near the ends and sealing elements installed in them protruding above the inner surface of the liner,

The disadvantage of this design is the almost complete sealing of the bearing unit, which, when intensifying the load on the bearing, leads to loss of bearing capacity of the bearing due to disturbance of the flow of lubricant cooling flows, creating an increased temperature mode of the bearing and thermal destruction of the lubricating film.

The purpose of the invention is to increase the durability of the structure by optimizing the temperature and distribution of hydrodynamic pressures.

This goal is achieved by the fact that in the slide bearing; including a shaft axle, an insert enclosing it from two half-sleeves with annular grooves located on their inner surfaces near the ends and sealing elements installed in them protruding above the inner surface of the liner, the sealing elements are made with a different radial thickness along the circumference, most of which are in the areas in the direction of the load, the annular grooves can be made intermittent and located in the areas in the direction of the load, and protrude and over the inner surface of the insert portion of the sealing element equal to the radial clearance.

FIG. 1 shows the crankshaft support of an internal combustion engine, section B-B in FIG. one; FIG. 2 is a view A of FIG. one; in fig. 3 - engine crankshaft bearing; FIG. 4 is a view B of FIG. 3

The support contains an insert of two half-sleeves 1 with annular grooves 2 located on their inner surfaces near the ends, with sealing elements 3 installed in them, made with a circle of different length

thick, greater than t, from which it is located in zones a in the direction of the load; V.2 - smaller radial thickness of the sealing element; d - pin diameter; D is the diameter of the liner; 3 - radial clearance. .

In this case, the liner can be either monometallic or bimetallic with a working surface coated with a soft

by alloy.

Sealing elements installed in the grooves limit the outflow of lubricant from the bearing in areas in the direction of the load and

increase its carrying capacity in the field of the smallest approaching of the shaft journal to the liner. In the unloaded support areas, which have a smaller radial thickness of the sealing element, there is an intensive face outflow of lubricant from the support, thereby removing wear products from the working area of the bearing, changing the lubricant and cooling the friction surface.

Use of the proposed support

slip provides sealing of the load areas, increases the bearing capacity of the support, which in turn leads to an increase in the service life of the shaft and

liner and engine as a whole.

Claims (3)

1. Slide bearing including shaft journal and two of its insert half-sleeves with annular grooves located on their inner surfaces near the ends and sealing elements installed in them protruding above the inner surface of the liner, characterized in that, in order to increase durability, the sealing elements are made with different circumferential radial thickness, most of which located in areas in the direction of the load. 2. Sliding support according to claim 1, characterized in that the annular grooves are made intermittent and are located in zones in the direction of the load. 3. Sliding bearing on PP. 1 and 2. characterized in that the part of the sealing element protruding above the inner surface of the liner is equal to the radial clearance. . Usch § INNXNX i TO/ 4NSNN