CN2547941Y

CN2547941Y - Long-life lubricating-oil self-circulating sleeve bearing structure

Info

Publication number: CN2547941Y
Application number: CN 02226707
Authority: CN
Inventors: 刘清平
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-04-09
Filing date: 2002-04-09
Publication date: 2003-04-30
Anticipated expiration: 2012-04-09

Abstract

The utility model provides a self-circulation cover type bearing structure of a lubricant with long service life, in particular to a cover type bearing used on a DC fan used for radiating a computer card, a CPU and various instruments and equipment, comprising a housing (1) which is provided with a plurality of oil grooves (2) which are provided with holes (3) and oil-sealing covers (5) for sealing axles and axle covers. The lubricant can circularly reflow in the bearing without the phenomenon that the lubricant is pumped totally by a rotating shaft with high speed; the oil stored in the clearance of the copper filings of the SLEEVE copper bush can be complemented timely, thereby guaranteeing the service life of the bearing and the reliability of operation with high speed. The arranged oil-sealing cover avoids the exposure of the end part of the oil cover and the spillage of the oil drip of the lubricant thrown out by centrifugal force. Therefore, the defects are overcome that the SLEEVE cover-type bearing is of short service life and can not used on a device with high requirement and long service life and the BALL bearing is of high production cost.

Description

Long-lived lubricant oil self-loopa shell type bearing structure

1. technical field

The utility model relates to a kind of shell type bearing structure, especially for the shell type bearing on the minisize dc radiation fan.

2. technical background

The direct current radiation fan (DCFAN) that is used for computer video card, CPU, POWER and the heat radiation of various instrument and equipment at present in the known technology is gone up the bearing that uses, and dividing by its rotational structure has four kinds of structures, and the one, ball bearing (BALL); The 2nd, oil-containing shell type bearing (SLEEVE); The 3rd, single BALL+SLEEVE shell type bearing; The 4th, SLEEVE+HYCON (just having reduced the end exposed area of SLEEVE oil-containing shell type shell type bearing).The all unlubricated oily loop structure of the basic structure of these shell type bearings circulates very poor in other words.The running life of oil-containing shell type bearing SLEEVE bearing structure and reliability are all not as good as BALL Miniature ball bearing, be because SLEEVE shell type bearing will be stored in the lubricant oil extraction that reaches the reservoir compartment, back in the axle sleeve in the rotating shaft meeting of operation process high speed rotation, the lubricant oil of extracting out can't in time return and recycle, cause lubricant oil to be drained gradually, cause shell type bearing oil starvation and dry up generation excessively heated axle stuck phenomenon.In theory, SLEEVE oil-containing shell type bearing is by tiny metal foam, and for example " copper " compacting sintering forms, and has the slight gap can store oil between the copper foam, can ooze out during running, and lubricant oil can reflux when lubricant oil shut down.But actual result is, because the axle that lubricant oil is run up during running pumps too fast too many, the gap between the copper foam is too little again, and lubricant oil can't in time reflux additional, be trapped in outer can't reflux the lubricant oil centrifugal action of being rotated by axle get rid of to aerial loss, lubricating oil is slowly exhausted.Rotating speed is fast more, and lubricant oil is also done soon more, and Yun Zhuan axle sleeve is because of oil starvation dry be scorched to death (stuck) at last.Thereby cause the SLEEVE oilite bushing to use.Thereby can not on the long-life equipment of high request, use.But it is one of about five parts consider to adopt the fan of SLEEVE oilite bushing bearing structure, its cost to be equivalent to the BALL ball bearing structure again from cost of production.

1. summary of the invention

The purpose of this utility model is at above-mentioned deficiency of the prior art, provides a kind of lubrication oil circulation that can make in the shell type bearing, can increase the structure of shell type bearing life.

The utility model structure is come by known that class shell type bearing development of SLEEVE bearing.

The purpose of this utility model can reach by following measure: the shell type bearing of this structure, the shell type bearing that uses on the DC fan especially for computer video card, CPU, POWER and the heat radiation of various instrument and equipment, comprise an oil seal cover 5 that has the housing 1 of some oil grooves 2 and be used for seal shaft and axle sleeve, its special way is to have hole 3 in the oil groove.

Oil seal cover of the present utility model can be to be shaped on two stage steps, on its small end step 7 seal ring 6 is housed.

The utility model compared with prior art has following beneficial effect:

The oilhole of leaving in the shell type bearing oil groove that lubrication oil circulation is refluxed, lubricant oil can be recycled in bearing, and can not produce the phenomenon that lubricant oil is drained by high-speed rotating shaft, make the oil of storing between copper foam gap obtain timely replenishing, guaranteed the reliability that long lifetime of bearing uses and runs up.The oil seal cover of band seal ring has not only been avoided the loss that sleeve end exposes and lubricant oil is thrown away by centrifugal force, and has improved the sealing of bearing.Thereby solved at preceding SLEEVE bearing housing structural life-time weak point, can not on the long-life equipment of high request, use the defective that BALL ball bearing cost of production is high.

4. description of drawings

Fig. 1 is the utility model structural representation

Fig. 2 is the utility model oil seal cover whole-cutaway view

5. mode of execution

Fig. 1 has described a most preferred embodiment of the present utility model.Wherein can make V-shaped groove or Baltimore groove, the size shape of groove and groove number and the prior art indifference left by the oil groove 2 of machining.Perforate 3 in the oil groove is a through hole, and any position at the shell type bearing can be opened in hole 3, and the position in hole is not limited only to shown in the figure.Number in the figure 4 is a bearing hole.Oil seal cover 5 is made for the two stage steps shape, on the step 7 packing ring 6 should be housed.Oil seal cover is general to adopt impermeable nonmetallic material to make.

Claims

1. shell type bearing structure, the shell type bearing that uses on the DC fan especially for computer video card, CPU, POWER and the heat radiation of various instrument and equipment, comprise that one has the housing (1) of some oil grooves (2) and is used for seal shaft and the oil seal cover of axle sleeve (5), its special way is to have hole (3) in the oil groove.

2. by the described shell type bearing structure of claim 1, its another feature is that described oil seal cover (5) is shaped on two stage steps, on its small end step (7) seal ring (6) is housed.