CN111946746A

CN111946746A - Lubricating oil self-circulation type sliding bearing device

Info

Publication number: CN111946746A
Application number: CN202010608215.7A
Authority: CN
Inventors: 不公告发明人
Original assignee: Yueqing Huazun Electric Co Ltd
Current assignee: Yueqing Huazun Electric Co Ltd
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2020-11-17
Also published as: CN110454508B; CN111946745A; CN110454508A

Abstract

The invention discloses a lubricating oil self-circulation type sliding bearing device which is used for radially supporting a main shaft and comprises a journal sleeve and a bearing seat, wherein the journal sleeve is sleeved on the main shaft and is wrapped by the bearing seat, the bearing seat is in a split form, the bearing seat comprises an upper bearing seat and a lower bearing seat, the upper bearing seat and the lower bearing seat are connected through a fastener, and the journal sleeve is tightly matched with or in transmission connection with the main shaft. The inner surface of one side of the upper bearing seat facing the lower bearing seat is provided with an upper bearing lining surface, one side of the lower bearing seat facing the upper bearing seat is provided with a lower bearing lining surface, the journal sleeve comprises flanges arranged at two ends of the sleeve, the upper bearing lining surface and the lower bearing lining surface are two parts of the same cylindrical surface and jointly wrap the parts between the flanges on the journal sleeve, the flanges respectively abut against two end surfaces of the bearing seat, oil grooves are respectively formed in the upper bearing lining surface and the lower bearing lining surface, the oil grooves are annular by taking the main shaft as the axis, oil holes are formed in the upper bearing seat and are connected with the bottom of the oil groove and the outer.

Description

Lubricating oil self-circulation type sliding bearing device

Technical Field

The invention relates to the field of sliding bearings, in particular to a lubricating oil self-circulation type sliding bearing device.

Background

The sliding bearing is a bearing which works under sliding friction, compared with a rolling bearing, the sliding bearing can bear larger load, when the bearing precision is higher, the bearing works stably, reliably and noiselessly, and the sliding bearing is generally applied to extreme occasions such as high-speed heavy load, light load and the like.

In the prior art, a sliding bearing generally adopts an integral structure, lubricating oil can be injected into a friction surface, but heat generated after friction cannot be well treated, cooling water can be directly used to cool the bearing seat sometimes, and heat on the friction surface is transferred to the outer surface of the bearing seat through heat conduction, so that a complex cooling water structure is required. Lubricating oil of a sliding bearing in the prior art is unevenly smeared on a friction surface, oil is injected to a contact surface through an oil groove and an oil filling hole, most of the oil can only be filled in an area near the oil groove, the friction surface can not be smeared in a full-coverage mode, and friction heating is large and abrasion is serious.

Disclosure of Invention

The invention aims to provide a sliding bearing device with a self-circulation type lubricating oil, which is used for solving the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a lubricating oil self-loopa formula's slide bearing device for radially supporting the main shaft, slide bearing device includes journal cover and bearing frame, and the journal cover is adorned on the main shaft, and the journal cover is wrapped up by the bearing frame, and the bearing frame is the split form, and the bearing frame includes bolster bearing frame and step, connects through the fastener between bolster bearing frame and the step, and journal cover and main shaft tight fit or transmission are connected.

The sliding bearing device provides radial support for the main shaft, a journal sleeve is sleeved on the main shaft and keeps a transmission relation with the main shaft, so that two friction contact surfaces do not contain the surface of the main shaft, the abrasion cannot occur on the main shaft, and even if the friction surface of the sliding bearing is abraded, only the part of the sliding bearing needs to be replaced, and the main shaft cannot be influenced. The journal sleeve is established to the main shaft cover, and journal sleeve structure as an organic whole, and the bearing frame is the components of a whole that can function independently form, and the bearing frame just also need not sheathe in the journal sleeve along the axial, only needs the partition back, radially wraps up the journal sleeve, and rethread fastener locks into a whole, and the dismouting slide bearing when the trouble appears or needs the maintenance is convenient, need not change main epaxial connection structure completely. The axial positioning of the journal sleeve on the main shaft can be realized by the forms of positioning pins, shaft sleeves and the like, and the proper axial positioning mode of the journal sleeve is specifically selected according to other structures on the main shaft. The upper and lower bearing seats are locked and fixed through the mounting lugs and the mounting seat which are respectively arranged.

Further, the inner surface of one side of the upper bearing seat facing the lower bearing seat is provided with an upper bearing lining surface, one side of the lower bearing seat facing the upper bearing seat is provided with a lower bearing lining surface, the journal sleeve comprises flanges arranged at two ends of the sleeve, the upper bearing lining surface and the lower bearing lining surface are two parts of the same cylindrical surface and jointly wrap the parts between the flanges on the journal sleeve, the flanges respectively abut against two end surfaces of the bearing seat, oil grooves are formed in the upper bearing lining surface and the lower bearing lining surface, the oil grooves are annular by taking the main shaft as the axis, oil holes are formed in the upper bearing seat, and the oil holes are connected with the bottom of the oil groove and the.

The upper bushing surface and the lower bushing surface form a complete cylindrical surface and are used for being matched and contacted with an outer cylindrical surface of a journal sleeve to form a friction pair or a friction surface, the friction pair or the friction surface is also a rotary supporting surface of the sliding bearing, a metal layer is poured or pressed on the bushing surface, the metal layer has the effect of reducing friction force and prolonging the service life, the specific bushing surface material is similar to the bushing material of the sliding bearing in the prior art, such as babbitt alloy, tin bronze or lead bronze, and the like, and the proper bushing surface material is selected according to the specific use working conditions (linear speed, load size, environmental dust amount and the like) of the sliding bearing, such as the lead bronze is selected as the bushing surface material in a high-speed heavy-load occasion, the aluminum bronze is selected as the bushing surface material in a low-speed heavy load occasion, and the babbitt alloy which is a.

If need not pull up the main shaft when maintaining this slide bearing for the later stage, the journal cover is not taken off from the main shaft as far as possible when maintaining promptly, then just should let the material of journal cover harder than the bushing face, let wearing and tearing take place on the bushing face, but after the wearing and tearing take place under this condition, whole bearing frame is changed in the maintenance, the cost can be higher, and if can change the main shaft connection structure during the maintenance, then just can let the material of journal cover softer than the bushing face, make wearing and tearing take place on the journal cover surface, only need change the journal cover during the maintenance, the cost can be lower relatively.

The flange is used for axial positioning, and according to the aforesaid, the journal sleeve has carried out axial positioning on the main shaft, also needs axial positioning between journal sleeve and the upper and lower bearing housing, and the flange plays this purpose, and simultaneously, the flange can also shelter from the vice tip of friction, plays certain dustproof effect.

The lubricating oil is added into the oil groove from the oil hole and then contacts with the outer surface of the journal sleeve, and then the journal sleeve brings out a part of the lubricating oil and coats the part of the lubricating oil on the surrounding contact surface to form a thin oil film so as to reduce the friction coefficient; grooves, side lines and the like adjacent to the friction pairs are required to be machined to form a 2-5 mm round angle, so that sharp edges are prevented from rubbing the friction surfaces or lubricating oil films on the friction surfaces.

The sliding bearing device further comprises an oil pipe and an oil cup, the oil grooves are divided into two parts which are respectively close to two axial ends of the bearing seat, each oil groove comprises a first oil groove and a second oil groove, each oil hole comprises a first oil hole and a second oil hole, the first oil hole is connected with the bottom of the first oil groove and the outer surface of the upper bearing seat, the second oil hole is connected with the bottom of the second oil groove and the outer surface of the upper bearing seat, the first oil hole and the second oil hole which are positioned on the outer surface of the upper bearing seat are connected through the oil pipe, and the oil outlet end of the;

the cylindrical surface between the flanges on the journal sleeve is provided with a spiral groove, and two ends of the spiral groove are respectively positioned in the first oil groove and the second oil groove in the axial direction.

First oil groove and second oil groove are the two places that add lubricating oil outside the bearing frame on the friction surface, lubricating oil in first oil groove and second oil groove also can flow and fill in the helicla flute, and the helicla flute can follow the main shaft and rotate together, thereby produce a pushing action to lubricating oil, and lie in apparent first oilhole and second oilhole and couple together through oil pipe again, thereby let lubricating oil form a circulation circuit, lubricating oil constantly flows, the lubricating oil that flows through the friction surface not only plays the lubrication action, also can take away partly friction heat, hot lubricating oil is outside the bearing frame after, by air natural cooling, then return and lubricate and cool off once more in the bearing frame, the mobile power of lubricating oil is got from the main shaft, need not additional circulation drive, make this sliding bearing simple structure but the lubricated radiating effect still better. When the sliding bearing works, some lubricating oil is scattered and lost, so the lubricating oil needs to be supplemented in time, the lubricating oil is added into the bearing seat through the oil cup from the outside until the bearing seat is filled, then some lubricating oil is added in the oil cup in a surplus manner and remains in the oil cup, when the sliding bearing works, the lubricating oil in the oil cup is filled and supplemented, and attention should be paid to the following steps: when lubricating oil is added, original air in an oil groove, an oil hole and an oil pipe needs to be exhausted, and particularly, an exhaust valve can be arranged at the highest point for exhausting.

And as optimization, the upper bearing seat is provided with a positioning tenon, the lower bearing seat is provided with a positioning groove, and the upper bearing seat and the lower bearing seat are positioned on the split plane through the mortise and in the direction vertical to the main shaft. Although the upper bearing seat and the lower bearing seat can play a role in radial positioning when being installed, and axial positioning is realized by a flange, the cylindricity and the concentricity of the upper bearing seat and the lower bearing seat cannot be ensured during processing, and if the bearing surfaces only play a role in radial positioning, the pretightening force directions of the upper bearing seat and the lower bearing seat relative to the journal sleeve during installation are possibly inconsistent, and even a rigid staggered edge is generated at a seam of the cylindrical surface, so that the bearing capacity is influenced very much. The upper and lower bearing seats need to additionally determine the positioning reference of the cylindrical surface, the mortise connection is a positioning mode which is convenient to install, the upper and lower shaft lining surfaces are finally processed when the upper and lower bearing seats are processed, the upper and lower bearing seats are positioned through the positioning tenon and the positioning groove mortise, and the upper and lower shaft lining surfaces are processed in one processing step to ensure the cylindricity. The subsequent disassembly and assembly process of the upper bearing seat and the lower bearing seat only needs to align the mortise with the mortise, so that the uniformity of the lining surfaces of the upper bearing seat and the lower bearing seat can be ensured.

Preferably, the tubing comprises a section of coiled tubing. The coil pipe increases the contact surface of oil pipe and air, reinforcing radiating effect, can also set up some fins etc. and strengthen radiating effect once on the oil pipe.

Preferably, the axes of the first oil hole and the second oil hole are inclined and form an inclination angle of 45 degrees with the vertical surface. The main shaft has various loads, the main shaft can be divided into a unidirectional load and an alternating load according to directions, for the alternating load, the oil inlet and outlet angles of the first oil hole and the second oil hole have no influence, the unidirectional load has slight influence, the unidirectional load of the general main shaft is in a vertical direction or a horizontal direction, the unidirectional load rarely has inclined unidirectional load, the first oil hole and the second oil hole of the main shaft are obliquely arranged, and the large probability of the unidirectional load is staggered with a bearing area of a friction surface, so that the oil can be better fed and discharged and can be filled into the friction surface.

Preferably, a sleeve is arranged outside the oil pipe, the oil pipe and the sleeve form a heat exchanger, the oil pipe becomes a pipe side of the heat exchanger, and cooling water is introduced into a shell side of the heat exchanger. If the air cooling is not enough for the heat dissipation requirement of the lubricating oil, a cylinder is sleeved on the oil pipe, and the heat dissipation power can be improved by one or two orders of magnitude by carrying out the water cooling heat dissipation.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the journal sleeve is added in the bearing seat, and the journal sleeve is in transmission connection with the main shaft, so that friction is transferred to a contact surface of the journal sleeve and the bearing seat, the main shaft cannot be damaged after abrasion occurs, and only the parts of the sliding bearing need to be smoother; the half-and-half split bearing seat needs no dismounting of the main shaft except for dismounting of the journal sleeve and the main shaft, and the main shaft does not need to be dismounted under other conditions, so that the maintenance is convenient; the lubricating oil passageway of helicla flute, oil groove, oil pipe for the rotation of journal cover can promote lubricating oil and flow the circulation, when lubricating better, can also undertake the heat dissipation function, and friction surface heat is taken away to lubricating oil, cools off through air cooling or water-cooled mode outside the bearing frame, lets this slide bearing keep high-efficient stable operating condition, and the circulating power of lubricating oil comes from the main shaft, need not the outside and provides, so this slide bearing structure can be compact redundancy-free, and it is convenient to set up, and it is convenient to maintain.

Drawings

In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

FIG. 1 is an exploded view of the structure of the present invention;

FIG. 2 is an exploded view of the structure from another perspective of the present invention;

FIG. 3 is view A of FIG. 2;

FIG. 4 is view B of FIG. 2;

FIG. 5 is an external view of the journal sleeve of the present invention;

FIG. 6 is a view of the outer shape of the upper bearing housing of the present invention;

FIG. 7 is an external view of the lower bearing housing of the present invention;

FIG. 8 is a schematic view of the flow of lubricating oil according to the present invention.

In the figure: 1-shaft, 2-journal sleeve, 21-spiral groove, 22-flange, 3-upper bearing seat, 31-upper shaft lining surface, 32-mounting lug, 33-positioning tenon, 4-lower bearing seat, 41-lower shaft lining surface, 42-mounting seat, 43-positioning groove, 51-first oil groove, 52-second oil groove, 61-first oil hole, 62-second oil hole, 63-oil pipe, 64-oil cup and 7-heat exchanger.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, the lubricating oil self-circulation type sliding bearing device is used for radially supporting a main shaft 1, the sliding bearing device comprises a journal sleeve 2 and a bearing seat, the journal sleeve 2 is sleeved on the main shaft 1, the journal sleeve 2 is wrapped by the bearing seat, the bearing seat is in a split form, the bearing seat comprises an upper bearing seat 3 and a lower bearing seat 4, the upper bearing seat 3 and the lower bearing seat 4 are connected through a fastener, and the journal sleeve 2 is tightly matched with or in transmission connection with the main shaft 1.

The sliding bearing device provides radial support for the main shaft 1, a journal sleeve 2 is sleeved on the main shaft 1 and keeps a transmission relation with the main shaft 1, so that two friction contact surfaces do not contain the surface of the main shaft 1, abrasion cannot occur on the main shaft 1, even if the friction surface of the sliding bearing is abraded, only the part of the sliding bearing needs to be replaced, and the main shaft 1 cannot be influenced. Journal cover 2 is established to 1 cover of main shaft, and journal cover 2 structure as an organic whole, and the bearing frame is the components of a whole that can function independently form, and the bearing frame just also need not sheathe in journal cover 2 along the axial, only needs the partition back, and journal cover 2 is gone up in radial parcel, and rethread fastener locking becomes a whole, and the dismouting slide bearing when conveniently breaking down or needing the maintenance need not change the connection structure on the main shaft 1 completely. The axial positioning of the journal sleeve 2 on the main shaft 1 can be realized by the form of a positioning pin, a shaft sleeve and the like, and the proper axial positioning mode of the journal sleeve 2 is specifically selected according to other structures on the main shaft 1. As shown in fig. 1, 6 and 7, the upper and lower bearing blocks are locked and fixed by the mounting ears 32 and the mounting blocks 42 respectively.

As shown in fig. 2 to 7, an upper bushing surface 31 is arranged on the inner surface of one side of the upper bearing seat 3 facing the lower bearing seat 4, a lower bushing surface 41 is arranged on one side of the lower bearing seat 4 facing the upper bearing seat 3, the journal sleeve 2 includes flanges 22 arranged at two ends of the sleeve, the upper bushing surface 31 and the lower bushing surface 41 are two parts of the same cylindrical surface and jointly wrap the parts between the flanges 22 on the journal sleeve 2, the flanges 22 respectively abut against two end surfaces of the bearing seat, oil grooves are respectively formed in the upper bushing surface 31 and the lower bushing surface 41, the oil grooves are annular by taking the main shaft 1 as an axis, oil holes are formed in the upper bearing seat 3 and are connected with the bottom of the oil groove and the outer surface of the upper bearing seat.

The upper bushing surface and the lower bushing surface form a complete cylindrical surface and are used for being matched and contacted with an outer cylindrical surface of the journal sleeve 2 to form a friction pair or a friction surface, the friction pair or the friction surface is also a rotary supporting surface of the sliding bearing, a metal layer is poured or pressed on the bushing surface, the metal layer has the effect of reducing friction force and prolonging the service life, the specific bushing surface material is similar to the bushing material of the sliding bearing in the prior art, such as babbitt alloy, tin bronze or lead bronze, and the like, and the proper bushing surface material is selected according to the specific use working conditions (linear speed, load size, environment dust amount and the like) of the sliding bearing, such as the lead bronze is selected as the bushing surface material in a high-speed heavy-load occasion, the aluminum bronze is selected as the bushing surface material in a low-speed heavy load occasion, and the babbitt alloy which is a.

If do not need to pull down main shaft 1 when maintaining this slide bearing for the later stage, journal sleeve 2 does not take off from main shaft 1 as far as possible when the maintenance promptly, then just should let the material of journal sleeve 2 harder than the bushing face, let the wearing and tearing take place on the bushing face, but after the wearing and tearing take place under this condition, the whole bearing frame is changed in the maintenance, the cost can be higher, and if can change main shaft 1 connection structure during the maintenance, then just can let the material of journal sleeve 2 be softer than the bushing face, make the wearing and tearing take place on journal sleeve 2 surface, only need change journal sleeve 2 during the maintenance, the cost can be lower relatively.

The flange 22 is used for axial positioning, and as mentioned above, the journal sleeve 2 is already axially positioned on the main shaft 1, axial positioning is also needed between the journal sleeve 2 and the upper and lower bearing seats, and the flange 22 serves the purpose, and meanwhile, the flange 22 can also shield the end part of the friction pair to play a certain dustproof role.

In order to add lubricating oil to the friction surface of the oil groove and the oil hole, so that the friction loss is reduced, the service life of the bearing is prolonged, the lubricating oil is added into the oil groove from the oil hole and then is in contact with the outer surface of the journal sleeve 2, and then the journal sleeve 2 brings out a part of the lubricating oil and coats the lubricating oil on the surrounding contact surface to form a thin oil film so as to reduce the friction coefficient; grooves, side lines and the like adjacent to the friction pairs are required to be machined to form a 2-5 mm round angle, so that sharp edges are prevented from rubbing the friction surfaces or lubricating oil films on the friction surfaces.

As shown in fig. 2 and 6, the sliding bearing device further includes an oil pipe 63 and an oil cup 64, the oil grooves are divided into two parts, which are respectively close to two ends of the bearing seat in the axial direction, the oil grooves include a first oil groove 51 and a second oil groove 52, the oil holes include a first oil hole 61 and a second oil hole 62, the first oil hole 61 connects the groove bottom of the first oil groove 51 and the outer surface of the upper bearing seat 3, the second oil hole 62 connects the groove bottom of the second oil groove 52 and the outer surface of the upper bearing seat 3, the first oil hole 61 and the second oil hole 62 on the outer surface of the upper bearing seat 3 are connected through the oil pipe 63, and the oil outlet end;

spiral grooves 21 are formed on the cylindrical surface between the flanges 22 on the journal sleeve 2, and both ends of the spiral grooves 21 are respectively located in the first oil groove 51 and the second oil groove 52 in the axial direction.

The first oil groove 51 and the second oil groove 52 are two places for adding lubricating oil to the friction surfaces outside the bearing seat, the lubricating oil in the first oil groove 51 and the second oil groove 52 also flows and fills the spiral groove 21, and the spiral groove 21 rotates together with the main shaft 1, thereby generating a pushing action on the lubricating oil, and the first oil hole 61 and the second oil hole 62 located at the outer sides are connected by the oil pipe 63, so that the lubricating oil forms a circulation loop, the lubricating oil continuously flows, as shown in fig. 8, the lubricating oil flowing through the friction surface not only plays a role of lubrication, but also takes away a part of friction heat, the hot lubricating oil is naturally cooled by air after reaching the outside of the bearing seat, then returning to the bearing seat for lubrication and cooling again, wherein the flowing power of the lubricating oil is taken from the main shaft 1, and additional circulating drive is not needed, so that the sliding bearing has a simple structure and still has good lubricating and heat-radiating effects. When the sliding bearing works, some lubricating oil is scattered and lost, so the lubricating oil needs to be supplemented in time, the lubricating oil is added into the bearing seat through the oil cup 64 from the outside until the bearing seat is filled, then some lubricating oil is added in the oil cup 64 in a surplus manner, when the sliding bearing works, the lubricating oil in the oil cup 64 is filled and supplemented after the lubricating oil is lost, and attention should be paid to the following steps: when adding lubricating oil, the original air in the oil groove, oil hole and oil pipe 63 should be discharged, and specifically, an exhaust valve may be arranged at the highest point for exhausting.

As shown in fig. 2 to 4, the upper bearing seat 3 is provided with a positioning tenon 33, the lower bearing seat 4 is provided with a positioning groove 43, and the upper bearing seat 3 and the lower bearing seat 4 are positioned on the split plane perpendicular to the direction of the main shaft 1 through the tenon groove. Although the upper and lower bearing seats can play a role in radial positioning on the bushing surface during installation, and axial positioning is realized by the flange 22, the cylindricity and concentricity of the upper and lower bushing surfaces cannot be guaranteed during processing, and if the bushing surfaces are only used for bearing the radial positioning effect, the pretightening force directions of the upper and lower bearing seats relative to the journal sleeve 2 during installation are possibly inconsistent, and even rigid misalignment is generated at the joint of the cylindrical surfaces, so that the bearing capacity is greatly influenced. Therefore, the upper and lower bearing seats need to additionally determine the positioning reference of the cylindrical surface, the mortise connection is a positioning mode which is convenient to install, the upper and lower shaft lining surfaces are finally processed when the upper and lower bearing seats are processed, the upper and lower bearing seats are positioned through the mortise of the positioning tenon 33 and the positioning groove 43, and then the upper and lower shaft lining surfaces are processed in one processing step to ensure the cylindricity. The subsequent disassembly and assembly process of the upper bearing seat and the lower bearing seat only needs to align the mortise with the mortise, so that the uniformity of the lining surfaces of the upper bearing seat and the lower bearing seat can be ensured.

As shown in fig. 2, oil pipe 63 comprises a length of coiled tubing. The coil pipe increases the contact surface of oil pipe 63 and air, strengthens the radiating effect, can also set up some fins etc. at one-time reinforcing radiating effect on oil pipe 63.

As shown in fig. 1 and 6, the first oil hole 61 and the second oil hole 62 are inclined at an axis line and an inclination angle of 45 ° from the vertical plane. The load of the main shaft 1 can be various, and can be divided into a unidirectional load and an alternating load according to the direction, for the alternating load, the oil inlet and outlet angles of the first oil hole 61 and the second oil hole 62 have no influence, but the unidirectional load has little influence, the unidirectional load of the general main shaft 1 is either in the vertical direction or in the horizontal direction, and has little inclined unidirectional load, and the first oil hole 61 and the second oil hole 62 of the device are obliquely arranged for oil inlet and outlet, and are staggered with the bearing area of the friction surface with high probability, so that the oil can be better fed and discharged and the friction surface can be filled with the oil.

As shown in fig. 8, a sleeve is arranged outside the oil pipe 63, the oil pipe 63 and the sleeve form the heat exchanger 7, the oil pipe 63 serves as a pipe side of the heat exchanger 7, and cooling water is introduced into a shell side of the heat exchanger 7. If the air cooling is not enough for the heat dissipation requirement of the lubricating oil, a cylinder is sleeved on the oil pipe 63, and the heat dissipation power can be improved by one or two orders of magnitude by carrying out the water cooling heat dissipation.

The use principle of the device is as follows: with journal sleeve 2 suit on main shaft 1, upper and lower bearing housing of half are mutually supported, hoop cover journal sleeve 2, it is fixed through the fastener between the upper and lower bearing housing, the oil groove, helical groove 21, be full of lubricating oil in the oil pipe 63, when the helical groove is rotatory along with main shaft 1, with lubricating oil propelling movement in the oil groove to another oil groove in one, then form the circulation from the palirrhea formation of oil pipe 63 outside the bearing housing, lubricating oil is cooled off by the outside when oil pipe 63 outside the bearing housing flows, then get back to and cool off again in good state, it is lubricated in the bearing housing.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A sliding bearing device of a lubricating oil self-circulation type for radially supporting a main shaft (1), characterized in that: the sliding bearing device comprises a journal sleeve (2) and a bearing seat, the journal sleeve (2) is sleeved on a main shaft (1), the journal sleeve (2) is wrapped by the bearing seat, the bearing seat is split, the bearing seat comprises an upper bearing seat (3) and a lower bearing seat (4), the upper bearing seat (3) and the lower bearing seat (4) are connected through a fastener, and the journal sleeve (2) is tightly matched with or in transmission connection with the main shaft (1);

the inner surface of one side, facing the lower bearing seat (4), of the upper bearing seat (3) is provided with an upper bushing surface (31), one side, facing the upper bearing seat (3), of the lower bearing seat (4) is provided with a lower bushing surface (41), the journal sleeve (2) comprises flanges (22) arranged at two ends of a sleeve, the upper bushing surface (31) and the lower bushing surface (41) are two parts of the same cylindrical surface and jointly wrap the part between the upper flanges (22) of the journal sleeve (2), the flanges (22) respectively abut against two end surfaces of the bearing seat, oil grooves are respectively formed in the upper bushing surface (31) and the lower bushing surface (41), the oil grooves are annular with the main shaft (1) as the axis, the upper bearing seat (3) is provided with oil holes, and the oil holes are connected with the bottom of the oil grooves and the outer surface of the upper bearing seat (3);

the sliding bearing device further comprises an oil pipe (63) and an oil cup (64), the oil grooves are divided into two parts and are respectively close to two ends of the bearing seat in the axial direction, each oil groove comprises a first oil groove (51) and a second oil groove (52), each oil hole comprises a first oil hole (61) and a second oil hole (62), the first oil hole (61) is connected with the bottom of the first oil groove (51) and the outer surface of the upper bearing seat (3), the second oil hole (62) is connected with the bottom of the second oil groove (52) and the outer surface of the upper bearing seat (3), the first oil hole (61) and the second oil hole (62) which are positioned on the outer surface of the upper bearing seat (3) are connected through the oil pipe (63), and the oil outlet end of the oil cup (64) is connected with;

a spiral groove (21) is formed in the cylindrical surface between the upper flanges (22) of the journal sleeve (2), and two ends of the spiral groove (21) are axially located in a first oil groove (51) and a second oil groove (52) respectively;

the upper bearing seat (3) and the lower bearing seat (4) are positioned on the split plane in a direction vertical to the main shaft (1) through the mortises; the axes of the first oil hole (61) and the second oil hole (62) are inclined and form an inclination angle of 45 degrees with the vertical surface.