CN2702117Y

CN2702117Y - Double layer floating bearing

Info

Publication number: CN2702117Y
Application number: CN 200420017610
Authority: CN
Inventors: 刘立想; 刘风
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-04-01
Filing date: 2004-04-01
Publication date: 2005-05-25
Anticipated expiration: 2014-04-01

Abstract

The utility model relates to a double layer floating bearing, belonging to the technical field of sliding bearings. The existing floating bearing is the single layer floating bearing, and mainly used for the sliding fitting of 10-150 thousands r/min mechanical products, and the service life is relative short. To prolong the service life of the floating bearing, the double layer floating bearing of the utility model comprises a first layer floating bearing (1) and an outer circle second layer floating bearing (2), and the double layer floating bearing is characterized in that the outer circle second layer floating bearing (2) and the first layer floating bearing (1) are composed to a double layer floating fitting assembly with a reasonable gap. The double layer floating bearing of the utility model has simple structure and easy processing and producing, under the same working condition, compared with the existing single layer floating bearing the abrasion is clearly reduced, and the service life of the high speed precision bearing is improved more than two times.

Description

A kind of double-deck floating bearing

Technical field

A kind of double-deck floating bearing belongs to the sliding bearing field, particularly the high speed and precision sliding bearing.

Background technique

Alleged in the industry floating bearing typically refers to the whole individual layer cylindrical bearing by bearing material processing, and it becomes to be slidingly matched with the axle of high speed rotating, floats in the bearing support.The lubricant medium of its slip interface or air film or lubricant film.

This type of individual layer floating bearing, being slidingly matched of engineering goods that is used for ten thousand rev/mins of 1-15 more, working life is short relatively, for example on turbosupercharger, one cover floating bearing is used 1 year at the most, that have even less than just wearing and tearing half a year, its main cause is that the linear velocity of inside and outside round relative movement of bearing is too high, causes the friction wear of bearing to accelerate and lost efficacy.

Summary of the invention

In order to improve the working life of floating bearing in the high speed and precision machinery, solve existing individual layer floating bearing quick abrasion, short problem of life-span, a kind of double-deck floating bearing design proposal of special proposition, promptly outside existing individual layer floating bearing, increase the second layer floating bearing that floats and cooperate again, this bilayer floating bearing floats in the bearing support.Because double-deck floating bearing has lowered the linear velocity of the high speed rotating of former individual layer floating bearing, so reduced the wearing and tearing of bearing effectively, and make wearing and tearing more even, avoid local inordinate wear, the early failue that causes.

A kind of double-deck floating bearing technological scheme of the utility model is as follows:

1, a kind of double-deck floating bearing is made up of first layer floating bearing (1) and cylindrical second layer floating bearing (2), it is characterized in that said cylindrical second layer floating bearing (2) and first layer floating bearing (1) constitute the unsteady fitted bearing assembly of bilayer of appropriate gap.

2, said a kind of double-deck floating bearing is characterized in that said first layer floating bearing (1) has radial direction oil hole (3), and outer round surface has annulus oil groove (4).

3, said a kind of double-deck floating bearing is characterized in that said cylindrical second layer floating bearing (2) has radial direction oil hole (5), and its outer round surface is driven oil groove (6) or do not driven oil groove.

4, said a kind of double-deck floating bearing is characterized in that the said cylindrical second layer floating bearing (2) and the matching gap of first layer floating bearing (1) are 10-100um.

5, said a kind of double-deck floating bearing is characterized in that said cylindrical second layer floating bearing (2) and first layer floating bearing (1), adopts by identical bearing material or the different bearing materials that are complementary and forms.

The double-deck floating bearing of the utility model innovative design, simple in structure, convenient processing and manufacture, under identical operating mode, existing individual layer floating bearing, wearing and tearing obviously reduce, obvious technical effects, the working life of having improved high-speed precision bearing, its economic effect was fairly obvious more than one times.

Description of drawings:

Fig. 1 the utility model structural representation

Specific embodiments

The turbosupercharger of example 1, certain medium-sized minibus, its rotating shaft diameter of axle 7mm, bearing support 14mm adopts the utility model floating bearing.First layer floating bearing (1) and second layer floating bearing (2) all adopt the tin bronze bearing material, and this first layer floating bearing (1) and second layer floating bearing (2) have 6 radial direction oil hole (3) and (5).

First layer floating bearing (1) outer round surface has annulus oil groove (4), brearing bore and rotating shaft are sliding fit, matching gap between the first layer (1) and the second layer (2) is 30um, bearing top circle and bearing support gap are 40um, be used for this automobile machine of having an effect after testing, this supercharger speed is about 180,000 rev/mins, uses to surpass a year and a half, functional, still continuing use.

Example 2, certain 6 Cylinder engine pressurized machine diameter of axle 9.8mm, bearing support 16mm, adopted the double-deck floating bearing of the utility model, its parameter is identical with example 1, after assembling detects, is used for above-mentioned motor, its rotating speed is 150,000 rev/mins, surpassed a year and a half working life, functional, still continuing use.

Example 3, except according to the bearing support condition, cylindrical second layer floating bearing (2) outer surface of the utility model floating bearing that is adopted also has oil groove (6) in addition, all the other conditions, parameter is all identical with example 2, surpassed a year and a half working life, functional, still continuing use.

Claims

2, according to the said a kind of double-deck floating bearing of claim 1, it is characterized in that said first layer floating bearing (1) has radial direction oil hole (3), outer round surface has annulus oil groove (4).

3, according to the said a kind of double-deck floating bearing of claim (1), it is characterized in that said cylindrical second layer floating bearing (2) has radial direction oil hole (5), its outer round surface is driven oil groove (6) or is not driven oil groove.

4, a kind of double-deck floating bearing according to claim 1 is characterized in that the said cylindrical second layer floating bearing (2) and the matching gap of first layer floating bearing (1) are 10-100um.

5, it is characterized in that said cylindrical second layer floating bearing (2) and first layer floating bearing (1) according to the said a kind of double-deck floating bearing of claim 1, adopt by identical bearing material or the different bearing materials that are complementary and form.