CN2934725Y - Split type bearing bush of lubricant hydrodynamic journal bearing - Google Patents

Abstract

The utility model relates to a split bearing bush for a fluid-lubricating hydrodynamic bearing. The split bearing bush comprises an outer convex tightly clinging to bearing cover and the bearing seat, an inner concave provided with a lubricating liquid membrane clearance between journals, a lubricant through hole running through the outer convex and inner concave and connected to the lubricant hole on the bearing seat, and as well as a lubricant storage groove arranged at the inner concave. The utility model is characterized in that the cross-section area of the lubricant through hole is 65 percents-75 percents of the cross-section area of the lubricant hole; the width of the abutted face of the journal is 110 percents -130 percents of the width of the abutted face of the bearing bush; the width of the bearing cover and the abutted face of the bearing seat is 110 percents -130 percents of the width of the abutted face of the bearing bush. The split bearing bush does not adopt locating tap in the utility model, and only visual aligning is required during installation. By increasing the friction between the bearing bush, the bearing cover and the bearing seat, relative displacement of the bearing bush can be effectively prevented, and the processing difficulty and production cost can be reduced, and the production efficiency can be improved.

Description

A kind of split bushing of liquid lubrication hydraulic bearing

Technical field

The utility model relates to the part of sliding contact bearing, especially relates to the split bushing of the liquid lubrication hydraulic bearing that a kind of engine crankshaft neck and rod journal use.

Background technique

Topmost moving element is exactly bent axle, piston and connecting rod in the motor.Crankshaft-and-connecting-rod generally is to adopt to comprise bearing cap, bearing support, the split-type shaft bearing structure of subdivision bearing shell and bolt, the subdivision bearing shell directly and axle journal contact, be to comprise the Lubricants through hole, Lubricants is deposited watt shape semi-cylindrical body of groove, its outer convex surface is close to bearing cap, bearing support, improve bearing cap, the carrying of bearing support and heat dissipation potential, be provided with the lubricating liquid film gap between its inner concave and the axle journal, connect the Lubricants through hole and the bearing cap of outer convex surface and inner concave, Lubricants hole on the bearing support links to each other, the Lubricants that is arranged on inner concave is deposited groove and is used to store Lubricants, convex surface also is provided with retention Hp mostly outside, embed bearing cap, respective slot on the bearing support is used for auxiliary installation and fixing.This structure has increased difficulty of processing, makes manufacturing process complicated, has both reduced manufacturing efficient, has improved manufacture cost again.

Summary of the invention

Technical problem to be solved in the utility model is, overcomes above-mentioned the deficiencies in the prior art, and the split bushing of the liquid lubrication hydraulic bearing that a kind of engine crankshaft neck and rod journal use is provided, and retention Hp needn't be set, to reduce difficulty of processing and manufacture cost.

Technical problem of the present utility model is solved by the following technical programs:

The split bushing of this liquid lubrication hydraulic bearing, it is a watt shape semi-cylindrical body, comprise the outer convex surface of being close to bearing cap, bearing support, with axle journal between be provided with the inner concave in lubricating liquid film gap, the Lubricants through hole that connects outer convex surface and inner concave and link to each other with Lubricants hole on bearing cap, the bearing support, and the Lubricants that is arranged on inner concave is deposited groove.

The characteristics of the split bushing of this liquid lubrication hydraulic bearing are:

The area of described Lubricants through hole cross section be the Lubricants hole cross section on the bearing support area 65%～75%, align and forbidden the error that causes to eliminate range estimation.

The faying surface width of described axle journal be described bearing shell the faying surface width 110%～130%, align with further elimination range estimation and to be forbidden the error that causes.

The faying surface width of described bearing cap, bearing support be described bearing shell the faying surface width 110%～130%, align with further elimination range estimation and to be forbidden the error that causes.

Because the suffered pressure of lower bearing comprises the pressure that the long difference of semi-circumference causes, the pressure that the free elasticity tensor of semicircular opening causes, and bent axle, the pressure that the connecting rod deadweight produces, and bent axle, there is lubricating liquid film lubricated between connecting rod and bearing shell, friction factor is less, under the effect of the suffered pressure of lower bearing, frictional force between lower bearing and the bearing cap is much larger than bent axle, frictional force between connecting rod and lower bearing, bearing shell can't produce mobile, top bearing shell also is subjected to the pressure that semicircle girth difference causes, the corresponding frictional force that also has prevention to move produces, thereby the embedding bearing cap needn't be set, the retention Hp of the respective slot on the bearing support can be assisted and be installed and fixing bearing shell.

Technical problem of the present utility model is solved by following further technological scheme:

Preferably, the area of described Lubricants through hole cross section be the Lubricants hole cross section on the bearing support area 70%.

Preferably, the faying surface width of described axle journal be described bearing shell the faying surface width 120%.

Preferably, the faying surface width of described bearing cap, bearing support be described bearing shell the faying surface width 120%.

Described axle journal comprises crankshaft journal, rod journal.

Described bearing support is an engine cylinder-body.

Described engine cylinder-body comprises three cylinder engine cylinder body in upright arrangement, in-line four cylinder engine cylinder-body, V-arrangement six cylinder engine cylinder body.

The beneficial effect that the utility model is compared with the prior art is:

Split bushing of the present utility model has been cancelled retention Hp, only needs visual aligning to get final product during installation.When in fact if the frictional force between bearing shell and bearing cap, the bearing support is not enough to stop the bearing shell relative displacement, retention Hp can't stop bearing shell to move axially or rotate when bent axle rotates.The pressure that split bushing of the present utility model mainly produces by control semicircle girth difference, increase the frictional force between bearing shell and bearing cap, the bearing support, make it be enough to stop the bearing shell relative displacement, thereby reduced difficulty of processing and manufacture cost, improved manufacturing efficient.

Description of drawings

Below in conjunction with embodiment and contrast accompanying drawing the utility model is further specified.

Accompanying drawing is the assembling schematic representation of the split bushing of the utility model embodiment

Embodiment

As shown in drawings, a kind of split bushing 1 of three cylinder engine in upright arrangement comprises top bearing shell 1a and lower bearing 1b.

Top bearing shell 1a comprise the outer convex surface of being close to bearing support 3, with axle journal 4 between be provided with the lubricating liquid film gap inner concave, connect outer convex surface and inner concave and with bearing cap, the outer convex surface of perforation and inner concave and the Lubricants through hole 12 that links to each other with Lubricants hole on the bearing support, the Lubricants that is arranged on inner concave is deposited groove 14.The area of Lubricants through hole 12 cross sections is littler than the area of the Lubricants hole cross section on the bearing support 3, aligns and is forbidden the error that causes to eliminate range estimation.The area of Lubricants through hole 12 cross sections be the Lubricants hole cross section on the bearing support 3 area 65%～75%.

Lower bearing 1b comprises the outer convex surface of being close to bearing cap 2, and is provided with the inner concave in lubricating liquid film gap between the axle journal 4.

The faying surface width of described axle journal 4 be described top bearing shell 1a, lower bearing 1b the faying surface width 110%～130%, align with further elimination range estimation and to be forbidden the error that causes.

The faying surface width of described bearing cap 2, bearing support 3 be described top bearing shell 1a, lower bearing 1b watt the faying surface width 110%～130%, align with further elimination range estimation and to be forbidden the error that causes.

Place mould fixing on bearing shell, at one end load under the situation of 2500 newton's load, semicircle girth difference is 0.02～0.06, and the frictional force between bearing shell and bearing cap, the bearing support is enough to stop the bearing shell relative displacement.

The discharge capacity of described three cylinder engine in upright arrangement is 0.998L, power 50kW, Maximum Torque 93N.m.

Described axle journal 4 comprises crankshaft journal, rod journal.

Described bearing support 3 is engine cylinder-bodies.

Obviously, above-mentioned bearing shell 1 also can be used for in-line four cylinder engine cylinder-body, V-arrangement six cylinder engine cylinder body.

Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field; under the prerequisite that does not break away from the utility model design; can also make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that the utility model is determined by claims of being submitted to.

Claims (8)

1. the split bushing of a liquid lubrication hydraulic bearing, comprise the outer convex surface of being close to bearing cap, bearing support, with axle journal between be provided with the inner concave in lubricating liquid film gap, the Lubricants through hole that connects outer convex surface and inner concave and link to each other with Lubricants hole on bearing cap, the bearing support, and the Lubricants that is arranged on inner concave deposits groove, it is characterized in that:

The area of described Lubricants through hole cross section be the Lubricants hole cross section on the bearing support area 65%～75%;

The faying surface width of described axle journal be described bearing shell the faying surface width 110%～130%;

The faying surface width of described bearing cap, bearing support be described bearing shell the faying surface width 110%～130%.

2. the split bushing of liquid lubrication hydraulic bearing as claimed in claim 1 is characterized in that:

The area of described Lubricants through hole cross section be the Lubricants hole cross section on the bearing support area 70%.

3. the split bushing of liquid lubrication hydraulic bearing as claimed in claim 1 or 2 is characterized in that:

The faying surface width of described axle journal be described bearing shell the faying surface width 120%.

4. the split bushing of liquid lubrication hydraulic bearing as claimed in claim 3 is characterized in that:

The faying surface width of described bearing cap be described bearing shell the faying surface width 120%.

5. the split bushing of liquid lubrication hydraulic bearing as claimed in claim 4 is characterized in that:

The faying surface width of described bearing support be described bearing shell the faying surface width 120%.

6. the split bushing of liquid lubrication hydraulic bearing as claimed in claim 5 is characterized in that:

Described axle journal comprises crankshaft journal, rod journal.

7. the split bushing of liquid lubrication hydraulic bearing as claimed in claim 6 is characterized in that:

Described bearing support is an engine cylinder-body.

8. the split bushing of liquid lubrication hydraulic bearing as claimed in claim 7 is characterized in that:

Described engine cylinder-body comprises three cylinder engine cylinder body in upright arrangement, in-line four cylinder engine cylinder-body, V-arrangement six cylinder engine cylinder body.