CN101922502B

CN101922502B - Composite self-lubricating bearing

Info

Publication number: CN101922502B
Application number: CN200910146717A
Authority: CN
Inventors: 刘汉卿; 黄隆伟
Original assignee: XINCI TECHNOLOGY Co Ltd
Current assignee: XINCI TECHNOLOGY Co Ltd
Priority date: 2009-06-16
Filing date: 2009-06-16
Publication date: 2012-10-10
Anticipated expiration: 2029-06-16
Also published as: CN101922502A

Abstract

The invention relates to a composite self-lubricating bearing, which comprises a bearing group and a shell. The bearing group is formed by assembling at least two bearing units. Each bearing unit is provided with an axially-perforative axial hole in which an axial core passes through. The shell is a hollow tube body which is used for being sleeved on the outer edge of the bearing group along the axial core direction in a sealing way. At least one storage tank for storing a lubricating medium is defined by the bearing group and the shell. At least one micro gap runner communicated with the axial hole is arranged round the storage tank so as to continuously supply the lubricating medium. The lubricating medium exerts the efficacy of high-quality lubrication between the axial core and the axial hole.

Description

Composite self-lubricating bearing

Technical field

The present invention relates to a kind of composite self-lubricating bearing, the automatic supplemental lubrication medium of You Zhineng is to reach the composite self-lubricating bearing of strengthening the tribology effect.

Background technique

For making between bearing and the running shaft core running smooth and easy; And avoid that abnormal friction generates heat; Usually need often add supplemental lubrication medium (lubricant); The higher lubricant grease (gerase) of lubricant oil (oil) that for example toughness is lower and toughness and the oiling agent that contains the solid lubrication particle etc. are enough to the tribology interface (tribology interface) that the reach core is loaded so that between the axle outer core of shaft hole inner wall and rotation, continue to form; But, owing to often need add not only labor intensive and cause suitable inconvenience of supplemental lubrication medium, just in case timely supplemental lubrication medium, will cause bearing and axle core under unlubricated state quick initiation excessively friction generates heat and impaired.Existing self-lubricating bearing generally adopts lubricant oil to form the lubricated interface between axis hole and the axle core; But, make the bearing capacity of existing self-lubricating bearing be restricted, and because the viscosity meeting step-down of lubricant oil when high temperature because formed lubricant film is thinner; Cause lubricant film to become thinner; If at this moment bearing also must operate under high rotating speed or high load condition, then the axle core might be pushed the lubricant film of axis hole wall open, makes axle core wall direct and axis hole that high-revolving collision take place; Thereby cause existing excessive abrasion and the heating of self-lubricating bearing, cause said self-lubricating bearing noise to occur at last, scrape axle, reaming phenomenon and quicken damage.

Otherwise; Because lubricant grease and contain the usually lubricated innage of stickiness of the oiling agent of solid lubrication particle; So just can between axle core and axis hole, form thicker lubricated interface, cause to be difficult for when at high temperature operating producing excessively abrasion, also have preferable load bearing capacity; But because lubricant grease and contain the high viscosity characteristic of the oiling agent of solid lubrication particle; Usually only be applicable in the existing ball bearing, but ball bearing is made up of many elongate members, not only has on the high side, complex structure and structural disappearance such as more weak compared to self-lubricating bearing; And make it under high temperature, high capacity, high-revolving applied environment, no matter be a core load bearing capacity and high-temperature resistance and all receive severe challenge working life.Compared to existing self-lubricating bearing; Price is low, structure is simple and structural stronger speciality though have; Therefore but because self-lubricating bearing is made by the porous crack material than small holes usually, is difficult for the lubricant grease of impregnation viscosity higher and contains the oiling agent of solid lubrication particle, and in running, be difficult for smooth fuel feeding because of lubricant grease and the oiling agent tool high viscosity characteristic that contains the solid lubrication particle; More can't take the uniformity of lubricated interface into account; If lubricant grease and the oiling agent that contains the solid lubrication particle are changed directly being applied in the wall of axis hole, though can temporarily improve self-lubricating bearing bearing capacity to a certain degree, yet; In case lubricant grease or the oiling agent that contains the solid lubrication particle be approach exhaustion in rotary course gradually, can cause the excessively problem of abrasion and hurried intensification of self-lubricating bearing equally fast.

Therefore; To how to make self-lubricating bearing under high temperature, high capacity, high-revolving harsh running environment; Still can bring into play the function of timely supplemental lubrication medium for a long time; So that continue to form the lubricated interface that is enough to reach core load between the axle outer core of shaft hole inner wall and rotation, become the inventor and desired most ardently the problem of making great efforts to overcome with the relevant manufacturer and the dealer that are engaged in the industry.

Summary of the invention

The present invention is the disappearance that overcomes above-mentioned existing technology; Be to propose a kind of composite self-lubricating bearing; The design platform that oil storage through integrating lubricant medium (comprise lubricant oil, lubricant grease and contain the oiling agent of solid lubrication particle) and fuel feeding mechanism are set up self-lubricating bearing of new generation; To meet omnibearing application demand, no matter it is applied under high temperature, high capacity, the high-revolving harsh running environment, and under the industry demand in response to diversification; All can bring into play the function of timely supplemental lubrication medium for a long time, so that continue to form the even tribology interface that is enough to reach core load between the axle outer core of shaft hole inner wall and rotation.

Composite self-lubricating bearing of the present invention comprises a bearing pack and a housing, and wherein said bearing pack is to be formed by at least two bearing unit assembly, and said bearing unit is provided with the axis hole that axially runs through and wears for the axle core; Said housing is a hollow tube body; Be used for being located at the bearing pack outer rim along the shaft core direction stuffing box gland; And form at least one accumulator tank that stores lubricant medium by surrounding between bearing pack and the housing; Said accumulator tank is arranged with at least one microgap runner that is communicated with axis hole, to continue providing lubricant medium between axle core and axis hole, to bring into play the effect of high-quality tribology.Further improvement as said composite self-lubricating bearing; Said bearing pack can also be formed by the bearing unit assembly of two porous crack materials at least; And said bearing unit is contained be soaked with an amount of lubricant oil; Oil supply pipeline is except that at least one microgap runner that is communicated with axis hole through accumulator tank; And the capillary force through porous crack material itself continues the lubricant oil of lubricant medium and said impregnation is transported to the inwall of axis hole, to bring into play the multiple tribology effect that lubricant medium and lubricant oil are provided via different oil storages and oil supply pipeline simultaneously.

Further improvement as said composite self-lubricating bearing; Said bearing pack can also be processed by porous crack material; And form at least one oil storage tank that stores lubricant oil by surrounding between bearing pack and the housing; Oil supply pipeline is except that at least one microgap runner that is communicated with axis hole through accumulator tank; And the capillary force through porous crack material itself continues the lubricant oil in lubricant medium and the said oil storage tank is transported to the inwall of axis hole, to bring into play the another multiple tribology effect that lubricant medium and lubricant oil are provided via different oil storages and oil supply pipeline simultaneously.

Further improvement as said composite self-lubricating bearing; Said bearing pack can also be processed by containing the porous crack material that is soaked with moderate lubrication oil; And form at least one oil storage tank that stores lubricant oil by surrounding between bearing pack and the housing; Oil supply pipeline is except that at least one microgap runner that is communicated with axis hole through accumulator tank; And, a multiple tribology effect again of lubricant medium and lubricant oil is provided simultaneously via different oil storages and oil supply pipeline with performance through the lasting inwall that the lubricant oil and the lubricant oil in the oil storage tank of lubricant medium and said impregnation are transported to axis hole of the capillary force of porous crack material itself.When containing space and an axle core that is arranged in housing when bearing pack sealing runs on the axis hole of bearing; Through friction generates heat and centrifugal force is directed to the axis hole wall with the lubricant medium in the accumulator tank by the microgap runner of said self-lubricating bearing; Thereby can the smooth and easy lubricated interface that is uniformly distributed in suitable thickness between a core and the axis hole be provided through the microgap runner; And significantly reduce the chance that produces excessive abrasion, and manifest preferable load bearing capacity, prolong the working life of said self-lubricating bearing; For in response to different rotating speeds, different temperatures, unequally loaded application demand, can adopt the quantity and the size (effective diameter is between 0.02mm to 5mm) of different lubricant mediums and microgap runner, to guarantee the flowability in said microgap runner; In addition; Because bearing unit can use in advance the porous crack material of soaking by lubricating oil to process; Also can in bearing, set up the oil storage tank that stores the low lubricant medium of viscosity in advance simultaneously; When the axle core rotates in the axis hole; Cause the lubricant oil of impregnation in advance in the bearing and the lubricant medium expanded by heating in the oil storage tank through friction generates heat, thereby can the smooth and easy lubricated interface thin between a core and the axis hole that is uniformly distributed in be provided, reach the multiple lubricating effect that uses unitary composite formula self-lubricating bearing of the present invention can continue to replenish different lubricant mediums simultaneously through different oil storages and oil supply pipeline through capillary force.

Beneficial effect of the present invention is; A kind of composite self-lubricating bearing structure with multiple lubricating function is provided; Said composite self-lubricating bearing can be respectively through the accumulator tank of the lubricant medium that stores different viscosities, and continue lubricant medium is transported to the inwall of axis hole through the microgap runner that is communicated with axis hole; Again through the set oil storage tank that stores the lubricant medium of low viscosity of the bearing pack of porous crack material; And the said lubricant medium that passes through bearing pack impregnation in advance itself; Continue lubricant medium is transported to the inwall of axis hole through the capillary force of porous crack material; Providing polynary oil storage with oil supply pipeline and continue to provide the multiple lubricating function of different lubricant mediums simultaneously, thereby significantly extend and optimize the operating limit of composite self-lubricating bearing.

Another beneficial effect of the present invention is; A kind of composite self-lubricating bearing application platform through modular design is provided; Make in the housing of said self-lubricating bearing ccontaining a plurality of bearing units all can use identical die production, simplify the volume production processing procedure to reach, be easy to the purpose controlling and promote quality and reduce cost; Be in response to different axle core length and tribology condition simultaneously; Shape, number and the size of length that can be through the different arrangement modes between the adjacent shaft bearing unit, bearing unit and shape, microgap runner are adjusted the position and the deal of number with the capacity and the injection lubricant medium of accumulator tank; And then make composite self-lubricating bearing of the present invention be implemented in the low-cost elasticity that design flexible and application are provided down, to satisfy the application in industry demand of diversification.

Description of drawings

Fig. 1 is the stereo appearance figure of first embodiment of the invention;

Fig. 2 is the three-dimensional exploded view of first embodiment of the invention;

Fig. 3 is that the bearing unit of first embodiment of the invention combines schematic representation;

Fig. 4 is the assembling section of first embodiment of the invention;

Fig. 5 is a first embodiment of the invention and an assembling section of core assembling;

Fig. 6 is the assembling section of second embodiment of the invention;

Fig. 7 is the assembling section of third embodiment of the invention;

Fig. 8 is the assembling section of fourth embodiment of the invention and axle core.

Description of reference numerals: 1-housing; The 10-containing space; The 11-fin; The 2-bearing pack; 20,20a, 20b, 20c-accumulator tank; The 201-oil storage tank; The 21-bearing unit; The 210-axis hole; The 211-outer surface; The 2111-positioning groove; The 212-neck; The 213-joining portion; The 2131-slotted eye; 2130,2130a-microgap runner; 2130b, 2130c-microgap runner; 3-axle core.

Embodiment

Below in conjunction with accompanying drawing, do more detailed explanation with other technical characteristics and advantage to the present invention is above-mentioned.

Below referring to figs. 1 through Fig. 8, composite self-lubricating bearing of the present invention is further specified.

See also Fig. 1 to shown in Figure 5, the stereo appearance figure, three-dimensional exploded view, the bearing unit that are respectively first embodiment of the invention combine schematic representation, assembling section to reach and an assembling section of core assembling; Said composite self-lubricating bearing is made up of housing 1 and bearing pack 2, wherein:

Said housing 1 is one to run through vertically to form the hollow cylinder of a containing space 10, and it is to be processed by solid material of densification or porous crack material, and the internal face of said containing space 10 is provided with at least one fin 11 that extends vertically.

Said bearing pack 2 sealings are arranged in the containing space 10 of housing 1; It is that a pair of bearing unit 21 assembly vertically of being processed by solid material of densification or porous crack material is formed; One end of said bearing unit 21 is an outer surface 211; Said outer surface 211 extends into the neck 212 of an indent vertically; The end of said neck 212 is provided with a joining portion 213 with respect to outer surface 211, and said bearing unit 21 is provided with the axis hole 210 that axially runs through from the joining portion 213 of outer surface 211 to neck 212, wears for axle core 3; In addition, the periphery along outer surface 211 is provided with the corresponding positioning groove 2111 that engages each other with the fin 11 of housing 1; Again; The shape of the periphery wall of said outer surface 211 and size are that the internal face with containing space 10 is complementary; So that the salable internal face that fits in said containing space 10 of the periphery wall of outer surface 211; And bearing pack 2 firmly is maintained in the containing space 10 of housing 1, and by the internal face of the neck of adjacent two bearings unit 21 212 and containing space 10 form one can supply lubricant medium to store accumulator tank 20, and in accumulator tank 20, be provided with the microgap runner 2130 of at least one connection axis hole 210; Lubricant medium according to the invention is the medium that general reference has lubricating function, the oiling agent etc. that comprises the lubricant grease that the lower lubricant oil of toughness, toughness are higher and contain the solid lubrication particle.

The neck 212 of bearing unit in the present embodiment 21 is for being the hollow cone of gradually-reducing shape towards axially extended cross section from outer surface 211; And joining portion 213 is positioned at the contraction end of neck 212; The joining portion 213 of said bearing unit 21 is provided with radial at least one slotted eye 2131; Said slotted eye 2131 communicates with axis hole 210, at the joining portion of adjacent two bearings unit 21 213 joints form one group can be with lubricant medium seepage flow to axis hole 210 for the lubricated at least one microgap runner 2130 of axle core 3.

Through the combination of above-mentioned housing 1, make the accumulator tank 20 of formation one ring-type between the internal face of neck 212 and containing space 10, with the filling lubricant medium with bearing pack 2; The axial cross section of said accumulator tank 20 is possibly present different shapes according to the profile of neck 212, for example triangle, rectangle or circular arc etc.; Obviously, the shape of cited accumulator tank 20 is non-so promptly limit to claim of the present invention in the present embodiment, and any modification done according to specification of the present invention and graphic content such as or the equivalent structure of deriving all should be covered by claim of the present invention.

Said bearing pack 2 is to dock each other through the joining portion 213 of bearing unit 21, and makes a plurality of slotted eyes 2131 correspondences between the joining portion 213 surround a plurality of microgap runners 2130 that form between connection accumulator tank 20 and the axis hole 210; In use; When the axis hole 210 of bearing unit 21 is sheathed on a core 3 rotations; Lubricant medium in the accumulator tank 20 can be given birth to importing into of heat because of tribology and expanded; And the stickiness that makes lubricant medium wherein reduces and increases mobile; Impel lubricant medium in the accumulator tank 20 via these microgap runner 2130 seepage flow to axis hole 210; And is low towards the pressure ratio of axis hole 210 ends towards the pressure of accumulator tank 20 ends because the centrifugal force that is produced during the rotation of axle core 3 causes these microgap runners 2130, can further push lubricant medium to axis hole 210 through the pressure difference that these two ends form, and the lubricated interface of formation far is thicker than only uses the existing self-lubricating bearing of soaking by lubricating oil in advance; On the other hand; Because said bearing unit 21 is to be processed by the porous crack material of soaking by lubricating oil in advance; When tribology is living hot between axle core 3 that rotates and the axis hole 210; Make in the bearing unit 21 capillary holes lubricant oil because of the driving of expanded by heating and capillary force with between lubricant oil seepage flow to axis hole 210 and the axle core 3 to form the lubricant oil interface; Above-mentioned driving lubricant oil flows towards axis hole 210 directions can further strengthen the lubricated of a core 3; And then reach the effect that effectively prevents excessive intensification, make composite self-lubricating bearing of the present invention have the multiple lubrication mechanism of automatic make-up oil and lubricant medium, thereby can significantly prolong the working life and the load capacity that strengthens the axle core of self-lubricating bearing.

See also shown in Figure 6; It is the assembling section of second embodiment of the invention; Find out that by knowing shown in the figure bearing pack 2 is arranged in the containing space 10 of housing 1 for sealing, wherein said bearing pack 2 comprises three bearing units 21; Like the bearing unit 21 of employing with first embodiment's equal length; Then present embodiment can provide long axle core 3 loaded lengths, and for example will keep axle core 3 loaded lengths identical with first embodiment, and then present embodiment can adopt the bearing unit 21 relatively shorter than first embodiment; Can divide into butt joint and be connected in series two kinds of kenels according to the arrangement between adjacent two bearing units 21 of bearing pack 2 in containing space 10; Wherein, When being the butt joint arrangement between adjacent two bearing units 21; It is the joining portion 213 that butts up against another bearing unit 21 respectively with the joining portion 213 of a bearing unit 21; Surrounded by a plurality of slotted eyes 2131 at the joining portion 213 of said adjacent two bearing units 21 and to form one group of microgap runner 2130 with said slotted eye 2131 similar numbers, the sectional area of said group of microgap runner 2130 is the twice of said slotted eye 2131, and by the containing space 10 of

housing

1 and 212 of necks surround form one store lubricant medium accumulator tank 20; In addition; When being the serial connection arrangement between the adjacent two bearings unit 21; It is the outer surface 211 that is serially connected with another bearing unit 21 respectively with the joining portion 213 of a bearing unit 21; Make a plurality of slotted eyes 2131 at the joining portion 213 that is arranged at said bearing unit 21 and the outer surface 211 of another adjacent shaft bearing unit 21 surround another group microgap runner of formation 2130a; The sectional area of said group of microgap runner 2130a and number are identical with said slotted eye 2131, and are merely aforementioned the half the of said accumulator tank 20 when arranging that dock by capacity that the containing space 10 of

housing

1 and 212 of the necks of bearing pack 2 surround another group accumulator tank 20a that forms.

For the axle core 3 of same bearer length; Bearing pack 2 can shorten the length of bearing unit 21 relatively with the number that increases bearing unit 21; According to the various combination mode of arranging kenel between the above-mentioned adjacent two bearings unit 21; But can make the bearing pack 2 and the internal face of containing space 10 form accumulator tank 20, the 20a of more filling lubricant mediums; When 3 rotations of axle core, said fuel system not only can make through modular a plurality of being set in respectively than minor axis bearing unit 21 on short axle core 3 loaded lengths through accumulator tank 20a that increases newly and the microgap runner 2130a that increases newly; So that supply with lubricant medium more adequately and uniformly in axis hole 210 many places; And can make the thickness of axial distribution and tribology interface of formed lubricant medium between a core 3 and the bearing pack 2 more even, thereby can effectively suppress abnormal temperature rise, guarantee to increase the service life and strengthen bearing capacity.

See also shown in Figure 7; Assembling section for third embodiment of the invention; Find out by knowing shown in the figure; Bearing pack 2 is arranged in the containing space 10 of housing 1 for sealing, and said bearing pack 2 is made up of four bearing units 21, its be through with the 2 tandem settings of identical two bearing pack of first embodiment; For the axle core 3 of same loaded length; This kind fuel system not only can provide the identical accumulator tank 20b of another capacity and another identical microgap runner 2130b and make the capacity multiplication of fuel feeding compared to first embodiment; And because of respectively at two position fuel feeding of axis hole 210; Remove and further to make lubricant medium sufficient lubricant medium of supply on the axle core 3 of shorter length, also make the lubricant medium thickness of axial distribution and tribology interface of the lubricant medium of supplying more even.In addition; Compared to second embodiment's said fuel system, for the axle core 3 of same length, can provide identical with first accumulator tank, 20 capacity; But than the second accumulator tank 20a is big another accumulator tank 20b; So not only can further make lubricant medium more sufficient lubricant medium of supply on the axle core 3 of shorter length, and the second microgap runner 2130b bigger than the second microgap runner 2130a can be provided, and make the thickness of axial distribution and tribology interface of the lubricant medium of supplying more even.

Fig. 8 is the assembling section of composite self-lubricating bearing the 4th embodiment of the present invention and axle core; Said self-lubricating bearing surrounds the groove that forms three ring-type circular sections at the neck 212 of porous matter bearing pack 2 and the internal face of containing space 10; Be the accumulator tank 20c that stores lubricant medium wherein near central person; Be arranged with a plurality of microgap runner 2130c that are communicated with axis hole 210 through said accumulator tank 20c bottom; Continue to replenish that formed lubricant medium carries interface between axis hole 210 and the axle core 3, two grooves then are the oil storage tank 201 that stores lubricant oil in addition, through the capillary force of soaking by lubricating oil in porous matter bearing pack 2; Drive the further lasting lubricant oil that replenishes between axis hole 210 and the axle core 3 of lubricant oil and carry interface, thereby significantly extend and optimize the operating limit of composite self-lubricating bearing.

In sum; The present invention provides a kind of composite self-lubricating bearing of sustainable supply lubricant medium and lubricant oil between axle core 3 and axis hole 210 simultaneously; With design and application platform in response to different tribology interface demands; The quantity that institute can ccontaining bearing unit 21 in the containing space 10 of the said housing 1 of lifting, the shape that makes up kenel and bearing unit 21 are merely embodiment's explanation; Therefore do not limit to scope, the user can choose according to the length of length and the bearing unit 21 of axle core 3 bearing unit 21 quantity that will be provided with; And the face shaping of bearing unit 21 also is not limited to illustrated taper (first to the 3rd embodiment); Can produce the face shaping of disparate modules bearing unit 21 through the neck 212 of different curve generation; For example rhombogen, cylinder (the 4th embodiment), arc body etc.; All can form at least one annular recess formula accumulator tank 20c and oil storage tank 201 that centers on axis hole 210 and interconnect with above-mentioned axially-aligned of being lifted adjacent two bearings unit 21; In addition; Also can surround and form a plurality of mutual disconnected independent accumulator tank 20c and oil storage tanks 201 by the internal face of the neck of bearing pack 2 212 and containing space 10; As long as the length of housing 1 and the length of bearing pack 2 are complementary, and reach the effect of storing lubricant medium to provide by formed at least one accumulator tank 20c between housing 1 and the axis hole 210, and reach the effect of oil storage and fuel feeding by at least one group of microgap runner 2130c of the tribology interface that forms between axle core 3 and the axis hole 210; So just modular bearing unit 21 that can composite self-lubricating bearing of the present invention reaches the elasticity of design flexible and application in response to the application market of diversification; In addition, in the present invention shown in bearing pack 2 also can have said identical effect for integrally formed of a plurality of bearing units 21.

The present invention has following advantage:

(1) a kind of composite self-lubricating bearing structure with multiple lubricating function is provided; Said composite self-lubricating bearing can be respectively through the accumulator tank of the lubricant medium that stores different viscosities, and continue lubricant medium is transported to the inwall of axis hole through the microgap runner that is communicated with axis hole; Again through the set oil storage tank that stores the lubricant medium of low viscosity of the bearing pack of porous crack material; And the said lubricant medium that passes through bearing pack impregnation in advance itself; Continue lubricant medium is transported to the inwall of axis hole through the capillary force of porous crack material; Providing polynary oil storage with oil supply pipeline and continue to provide the multiple lubricating function of different lubricant mediums simultaneously, thereby significantly extend and optimize the operating limit of composite self-lubricating bearing.

(2) a kind of composite self-lubricating bearing application platform through modular design is provided; Make in the housing of said self-lubricating bearing ccontaining a plurality of bearing units all can use identical die production, simplify the volume production processing procedure to reach, be easy to the purpose controlling and promote quality and reduce cost; Be in response to different axle core length and tribology condition simultaneously; Shape, number and the size of length that can be through the different arrangement modes between the adjacent shaft bearing unit, bearing unit and shape, microgap runner are adjusted the position and the deal of number with the capacity and the injection lubricant medium of accumulator tank; And then make composite self-lubricating bearing of the present invention be implemented in the low-cost elasticity that design flexible and application are provided down, to satisfy the application in industry demand of diversification.

More than explanation is just illustrative for the purpose of the present invention, and nonrestrictive, those of ordinary skills understand; Under the situation of spirit that does not break away from following accompanying claims and limited and scope, can make many modifications, change; Or equivalence, but all will fall in protection scope of the present invention.

Claims

1. a composite self-lubricating bearing is characterized in that, it comprises a housing and a bearing pack, wherein:

Said housing is one to run through vertically to form the hollow cylinder of a containing space;

Said bearing pack is that the assembly vertically of at least two bearing units is formed; One end of said bearing unit is an outer surface; And extend to form a neck vertically from said outer surface; The end of said neck is provided with a joining portion with respect to said outer surface, and said bearing unit is provided with the axis hole that axially runs through and wears for the axle core from said outer surface to the joining portion of said neck; The neck of said bearing pack and the internal face of said containing space surround and form the accumulator tank that at least one confession lubricant medium stores, and are provided with the microgap runner of the said axis hole of at least one connection at said accumulator tank.

2. composite self-lubricating bearing according to claim 1; It is characterized in that; The internal face of said containing space is provided with at least one fin that extends vertically, and is provided with the corresponding positioning groove that engages each other with the fin of said housing along the periphery of said bearing unit outer surface.

3. composite self-lubricating bearing according to claim 1; It is characterized in that; The shape of the periphery wall of said outer surface and size are that the internal face with said containing space is complementary; So that the perimeter wall face seal of said outer surface fits in the internal face of said containing space, and said bearing pack firmly is maintained in the containing space of said housing.

4. composite self-lubricating bearing according to claim 1 is characterized in that the joining portion of said bearing unit is provided with at least one slotted eye, and said slotted eye communicates with said axis hole.

5. composite self-lubricating bearing according to claim 1 is characterized in that, said bearing unit is that porous crack material is processed, and contains in bearing and to be soaked with lubricant oil.

6. composite self-lubricating bearing according to claim 1 is characterized in that, two kinds of kenels of arrangement are arranged and be connected in series to the ranking and distinguishing that said bearing pack is arranged between the adjacent two bearings unit in the said containing space for docking.

7. composite self-lubricating bearing according to claim 6 is characterized in that, it is the joining portion that butts up against another bearing unit respectively with the joining portion of a bearing unit that said butt joint is arranged.

8. composite self-lubricating bearing according to claim 6 is characterized in that, it is the outer surface that is serially connected with another bearing unit respectively with the joining portion of a bearing unit that said serial connection is arranged.

9. composite self-lubricating bearing according to claim 7; It is characterized in that; The joining portion of said bearing unit is provided with at least one slotted eye; Said slotted eye communicates with said axis hole, is surrounded by the slotted eye at the joining portion of a slotted eye of said bearing unit and another adjacent shaft bearing unit to form a microgap runner.

10. composite self-lubricating bearing according to claim 8; It is characterized in that; The joining portion of said bearing unit is provided with at least one slotted eye, and said slotted eye communicates with said axis hole, is surrounded by the outer surface of a slotted eye of said bearing unit and another adjacent shaft bearing unit to form a microgap runner.

11. composite self-lubricating bearing according to claim 5 is characterized in that, the neck of said bearing pack and the internal face of said containing space surround and form the oil storage tank that at least one confession lubricant oil stores.

12., it is characterized in that said lubricant medium is higher lubricant grease of lower lubricant oil of toughness or toughness or the oiling agent that contains the solid lubrication particle according to claim 1 a described composite self-lubricating bearing.