CN110848271A

CN110848271A - Adjustable sliding bearing and adjusting method

Info

Publication number: CN110848271A
Application number: CN201911130944.XA
Authority: CN
Inventors: 徐鹏飞; 钱益来; 庞良; 居文龙
Original assignee: Zhangjiagang AAA Precision Manufacturing Ltd By Share Ltd
Current assignee: Zhangjiagang AAA Precision Manufacturing Ltd By Share Ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-02-28
Anticipated expiration: 2039-11-19
Also published as: CN110848271B

Abstract

The invention discloses an adjustable sliding bearing, which relates to the technical field of sliding bearings and comprises a bearing seat, a bearing assembly and a rotating shaft, wherein the bearing seat is provided with a through hole, the bearing assembly is arranged in the through hole, a shaft neck of the rotating shaft is arranged in the bearing assembly, and a lubricating film is arranged between the bearing assembly and the shaft neck of the rotating shaft, wherein the bearing assembly comprises: the sliding bearing I, the sliding bearing II and the connecting part. The adjustable sliding bearing also comprises at least two expansion sleeves. This application sets up the slide bearing one and the slide bearing two of disconnect-type respectively on the bearing frame, be favorable to receiving the pressure of axle journal left side bottom when slide bearing the bottom once, can not use the bearing frame as the fulcrum, the lower bottom impact pivot of prizing slide bearing two, the gradient that increases the pivot, the disconnect-type slide bearing one of this application promptly and slide bearing two for the slide bearing of integral type, can reduce the impact to the pivot, reduce the evenly distributed who destroys lubricated membrane (oil film, gas film etc.) thickness.

Description

Adjustable sliding bearing and adjusting method

Technical Field

The invention relates to the technical field of sliding bearings, in particular to an adjustable sliding bearing.

Background

Plain bearings, i.e. bearings that work under sliding friction. Under the condition of lubrication, two opposite sliding surfaces of the bearing are separated by the lubricating medium without direct contact, and the friction loss and the surface wear are greatly reduced. The formation of a lubricating film (oil film, gas film, etc.) between the journal and the bearing of the sliding bearing is a basic condition for the normal operation of the sliding bearing, and factors influencing the formation of the lubricating film include a lubricating mode, a relative movement speed of a kinematic pair, physical properties of a lubricant, roughness of the surface of the kinematic pair, and the like. The sliding bearing has stable and reliable work, no noise, large bearing capacity and high rotation precision, and the lubricating film has the functions of vibration absorption and impact resistance, so the sliding bearing is widely applied to engineering and is particularly good for use under the working condition of high speed and light load.

In a rotor system using a sliding bearing, even a rigid rotor inevitably has a certain degree of flexible deformation under the conditions of a large load and a high rotation speed, and in addition, factors such as installation errors, machining errors and deformation generated in heat treatment machining cause the rotating shaft and the bearing to be unable to keep a state of being always parallel when the rotor system is in operation. The deformation changes the shape and thickness of the lubricating film of the sliding bearing, further changes the pressure distribution of the lubricating film, and weakens the bearing capacity and the working stability of the sliding bearing. During operation, once the lubrication film of the sliding bearing is broken due to excessive tilting of the journal, direct contact between the journal and the bearing is immediately caused, causing edge friction, structural damage and even failure.

Chinese patent publication No. CN206190742U discloses a shaft deflection conjugate compensation sliding bearing mechanism, which comprises five parts, namely a shaft sleeve inner ring, a conjugate bearing sleeve, a sliding bearing i, a sliding bearing ii and an outer ring, wherein the conjugate bearing sleeve is of a middle-open type and comprises an upper bearing sleeve and a lower bearing sleeve, the conjugate bearing sleeve is in transition fit with a bearing body, the outer surface of the conjugate bearing sleeve is an arc-shaped convex turning curved surface, and the inner surface of the bearing body has a section of curved surface which is an arc-shaped concave turning curved surface. Because the friction between the arc-shaped revolution curved surface and the contact surface of the bearing body is small, and the bearing mechanism is not subjected to radial moment, when the rotating shaft is subjected to flexible deformation, the abrasion of the bearing body can be reduced, the reliability of the bearing mechanism is improved, however, the structure still causes the abrasion of the mechanism after long-time operation, and only can be integrally replaced after being damaged, so that the maintenance is not convenient.

Disclosure of Invention

The invention aims to solve the problem that the sliding bearing in the prior art is abraded due to direct contact between a journal and a bearing because a lubricating film is broken due to excessive inclination of the journal in operation.

Another object of the present invention is to provide a method of regulation.

In order to achieve one of the purposes, the invention adopts the following technical scheme: a regulatable sliding bearing comprising a bearing housing, a bearing assembly and a shaft, the bearing housing having a through-hole therein, the bearing assembly being mounted in the through-hole, a journal of the shaft being disposed in the bearing assembly, a lubrication film being provided between the bearing assembly and the journal of the shaft, wherein the bearing assembly comprises: the sliding bearing I is arranged in the through hole and is positioned on the left side of the through hole, and the sliding bearing I is provided with: the diameter of the first convex ring is larger than that of the through hole, and the first convex ring is positioned on the left side of the through hole; the first soft part is arranged on the right side of the first convex ring and is attached to the bearing seat; the sliding bearing II is arranged in the through hole and is positioned on the right side of the through hole, a gap is formed between the sliding bearing II and the sliding bearing I, and the sliding bearing II is provided with: the diameter of the second convex ring is larger than that of the through hole, and the second convex ring is positioned on the right side of the through hole; the second flexible part is arranged on the left side of the second convex ring and is attached to the bearing seat; the connecting part is made of soft and hard combined materials, relative movement of the first sliding bearing and the second sliding bearing is reduced to the greatest extent under the condition of limiting the size of a gap, the connecting part is of an annular structure, and the left end and the right end of the connecting part are connected with the first sliding bearing and the second sliding bearing; the adjustable plain bearing further comprises: at least two expansion sleeve, expansion sleeve are for having elastic loop configuration, and it is located between bearing assembly and the bearing frame, and the expansion sleeve suit is on slide bearing one with slide bearing two, the wall of its external diameter face laminating through-hole, and expansion sleeve inside has: the expansion space, the left and right side walls of the expansion sleeve are concave towards the direction of the expansion space.

In the technical scheme, in the working process of the rotating shaft, the first convex ring, the first soft part, the second convex ring and the second soft part respectively abut against the left side and the right side of the bearing seat to limit the transverse movement of the first sliding bearing and the second sliding bearing. In the process, the rotating shaft can be flexibly deformed due to the action of factors such as large external load, high rotating speed, machining and installation errors and the like which can occur to the rotating shaft. When the rotating shaft generates flexible deformation, the pressure applied by the rotating shaft is borne by the first sliding bearing and the second sliding bearing, the left lower part of the first sliding bearing and the right upper part of the second sliding bearing move and push the expansion sleeve to deform and unload force, and meanwhile, the first sliding bearing drives the upper end of the first sliding bearing and the second sliding bearing to drive the lower end of the first sliding bearing to synchronously move. Finally, in the process that one side of the expansion sleeve is stressed, deformed and tightened, the other side, opposite to the expansion sleeve, of the expansion sleeve is pulled by the sliding bearings I and II to form a stretching trend, and during stretching, the concave parts of the left side wall and the right side wall of the expansion sleeve are gradually straightened to adapt to the deformation of the sliding bearings I and II.

Further, in the embodiment of the invention, the expansion sleeve is fixed on the wall surface of the through hole.

Further, in the embodiment of the present invention, the expansion sleeve has a convex structure extending toward the central axis of the rotating shaft, and the outer surface of the first sliding bearing has: the first annular groove is internally provided with a convex structure, the convex structure can slide in the first annular groove, and the first annular groove limits the radial movement of the convex structure; the outer surface of the sliding bearing II is provided with: and the second annular groove is internally provided with a convex structure which can slide in the second annular groove, and the second annular groove limits the radial movement of the convex structure.

When the first sliding bearing and the second sliding bearing are deformed under pressure, the stress in the rotating direction of the rotating shaft is applied to a certain degree, the expansion sleeve slides on the first sliding bearing and the second sliding bearing, the bearing seat keeps static relative to the first sliding bearing and the second sliding bearing, the first sliding bearing and the second sliding bearing rotate automatically to drive the lubricating film to flow, and the thickness of the lubricating film is adjusted to be uniform.

Further, in embodiments of the present invention, the convex structures are triangular or trapezoidal.

Furthermore, in the embodiment of the invention, the convex structures are respectively in sealing fit with the first annular groove and the second annular groove.

Further, in the embodiment of the present invention, the connecting portion seals the gap between the first sliding bearing and the second sliding bearing. The lubricating oil of the lubricating film is prevented from flowing into the gap, and the strength of the lubricating film is reduced.

Furthermore, in the embodiment of the invention, the bearing seat, the expansion sleeve, the first sliding bearing, the second sliding bearing and the connecting part form a closed independent space.

Furthermore, in the embodiment of the present invention, the bearing seat further includes: the oil receiving port is communicated with the independent space. When the sliding bearing I and the sliding bearing II are inclined by applying pressure to the rotating shaft, a part of air in the independent space can be discharged, so that a certain negative pressure value is generated in the independent space, and when the air is sucked into the independent space to flow, the rotation of the sliding bearing I and the sliding bearing II is assisted, and the thickness uniformity of a lubricating film is adjusted.

Further, in the embodiment of the present invention, the connecting portion has: the oil filling port is communicated with the independent space and the space where the lubricating film is located; the oil filling device comprises a blocking part, wherein the blocking part is made of soft materials and arranged in the oil filling port, and the number of the blocking parts is at least two, and the blocking parts are arranged on the left side and the right side of the oil filling port and seal the oil filling port.

The oil filling system is connected into the oil receiving port of the bearing seat, the oil filling system injects lubricating oil into the oil filling port of the connecting portion, the blocking portion is opened by the pressure of the lubricating oil injected into the oil filling system to inject the lubricating oil into the space of the lubricating film, the thickness of the lubricating film is increased, the broken lubricating film is repaired, and the fluidity of the lubricating film is adjusted, so that the lubricating film tends to be complete and balanced.

Further, in the embodiment of the present invention, the blocking portion is inclined toward the central axis direction of the rotating shaft. The blocking part which inclines downwards is impacted by the lubricating film and deforms upwards, so that the blocking part is more and more compact, the oil filling opening is difficult to open, and the thickness of the lubricating film is uniform and stable.

Further, in the embodiment of the present invention, the bearing seat further includes: the air receiving port is communicated with the expansion space of the expansion sleeve.

The air pressure device is connected into an air receiving opening of the bearing seat, air is injected into or exhausted out of an expansion space of the expansion sleeve, and the pre-tightening pressure of the expansion sleeve on the sliding bearing I and the sliding bearing II is adjusted to control the influence of different stress of the rotating shaft on the deformation degree of the sliding bearing I and the sliding bearing II, namely when the kinetic energy of the rotating shaft is large, the pre-tightening pressure of the expansion sleeve is reduced, so that the distance between the sliding bearing I and the sliding bearing II and the bearing seat is large, and the direct contact between the sliding bearing I and the sliding bearing II and the bearing seat is favorably prevented from being; or when the kinetic energy of the rotating shaft is smaller, the shaft system is small in deformation, and the pre-tightening pressure of the expansion sleeve is increased, so that the distance between the first sliding bearing and the second sliding bearing and the bearing seat is slightly smaller, the working stability of the rotating shaft is facilitated, and the influence on the uniformity of the thickness of the lubricating film is further reduced.

The invention has the beneficial effects that:

first, this application sets up the slide bearing of disconnect-type and slide bearing two on the bearing frame respectively, is favorable to receiving the pressure of axle journal left side bottom when slide bearing bottom, can not use the bearing frame as the fulcrum, prizes the lower bottom impact pivot of slide bearing two, increases the gradient of pivot, and the disconnect-type slide bearing of this application promptly and slide bearing are two for the slide bearing of integral type, can reduce the impact to the pivot, reduce the evenly distributed who destroys lubricating film (oil film, gas film etc.) thickness.

Second, this application is through the elasticity that the inflation cover has, when the stress of pivot changes, through elastic relapse quick push extrusion lubricating film for the lubricating film produces the flow power, further makes the lubricating film of each face tend to evenly, avoids the uneven distribution of lubricating film (oil film, gas film etc.) thickness.

Third, lateral wall indent structure when the pivot slope about the expansion sleeve is passed through in this application, can be by slide bearing one, two stimulations of slide bearing, the part of lateral wall indent is straightened gradually about the expansion sleeve this moment, follows slide bearing one, the direction of slide bearing two removes, tightly laminate live slide bearing one, slide bearing two, avoid slide bearing one, the second and the expansion sleeve between appear the space, increase the stability of pivot work, be favorable to the evenly distributed of lubricated membrane (oil film, gas film etc.) thickness.

In order to achieve the second purpose, the invention adopts the following technical scheme: a method of regulation comprising the steps of:

when the sliding bearing I and the sliding bearing II are influenced by kinetic energy of the rotating shaft to move transversely, the convex ring I and the soft part I of the sliding bearing I and the convex ring II and the soft part II of the sliding bearing II respectively abut against the left side and the right side of the bearing seat to limit transverse movement of the sliding bearing I and the sliding bearing II;

the sliding bearing I and the sliding bearing II bear the pressure exerted by the shaft necks when the rotating shaft is stressed unevenly and inclines;

when the lower bottom of the sliding bearing is stressed, the sliding bearing moves and pushes the expansion sleeve at the bottom position of the left side to deform and unload force, and meanwhile, the lower bottom of the sliding bearing drives the upper end of the sliding bearing to synchronously move;

during stretching, in the process that one side of the expansion sleeve is stressed, deformed and tightened, the other side, opposite to the expansion sleeve, of the expansion sleeve is pulled by the first sliding bearing and the second sliding bearing to form a stretching trend, and during stretching, the concave parts of the left side wall and the right side wall of the expansion sleeve are gradually straightened to adapt to the deformation of the first sliding bearing and the second sliding bearing.

Further, in the embodiment of the present invention, in the deforming step, there is further provided a step of:

the self-rotation of the first sliding bearing and the second sliding bearing is carried out under the stress of the rotating direction of the rotating shaft to a certain extent when the first sliding bearing and the second sliding bearing are deformed under pressure, the expansion sleeve slides on the first sliding bearing and the second sliding bearing at the moment, the bearing seat keeps static relative to the first sliding bearing and the second sliding bearing, the first sliding bearing and the second sliding bearing rotate self to drive the lubricating film to flow, and the uniformity of the lubricating film is adjusted.

Further, in the embodiment of the present invention, in the regulation method, the method further includes the steps of:

and pressure regulation, namely, connecting an air pressure device into an air receiving port of the bearing seat, injecting air into an expansion space of the expansion sleeve or exhausting air out of the expansion space, and regulating the pre-tightening pressure of the expansion sleeve on the first sliding bearing and the second sliding bearing so as to control the influence of different stresses of the rotating shaft on the deformation degree of the first sliding bearing and the second sliding bearing.

Further, in the embodiment of the present invention, in the deforming step, the method further includes the steps of:

the oiling is lubricated, inserts oiling system in the oil receiving port of bearing frame, and oiling system pours into lubricating oil into to the oiling mouth of connecting portion into, opens the barrier portion through the pressure that oiling system pours into lubricating oil into and pours into lubricating oil into the space of lubricated membrane into, increases the thickness of lubricated membrane, restores cracked lubricated membrane and mobilizes the mobility of lubricated membrane, makes it tend to complete equilibrium.

Drawings

Fig. 1 is a perspective view of a controllable sliding bearing according to an embodiment of the present invention.

Fig. 2 is a schematic partial perspective view of a controllable sliding bearing according to an embodiment of the present invention.

Fig. 3 is a schematic side view of a controllable sliding bearing according to an embodiment of the present invention.

Fig. 4 is a schematic view of the operation effect of the adjustable sliding bearing according to the embodiment of the present invention.

Fig. 5 is an enlarged view of part a of bitmap 3.

FIG. 6 is a schematic diagram illustrating the gas injection effect of the adjustable sliding bearing according to the embodiment of the present invention.

Fig. 7 is a schematic view of the oiling effect of the adjustable sliding bearing according to the embodiment of the invention.

In the attached drawings

1. Bearing seat 11, oil receiving port 12 and air receiving port

2. A sliding bearing I21, a convex ring I22 and a soft part I

23. Annular groove one

3. A sliding bearing II 31, a convex ring II 32 and a soft part II

33. Annular groove II

4. Lubricating film 5, expansion sleeve 6 and connecting part

61. Oil filling port 62, blocking part 7 and rotating shaft

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clear and fully described, embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of some embodiments of the invention and are not limiting of the invention, and that all other embodiments obtained by those of ordinary skill in the art without the exercise of inventive faculty are within the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. But it is obvious. To one of ordinary skill in the art, the embodiments may be practiced without limitation to these specific details. In some instances, well-known regulation methods and structures have not been described in detail so as not to unnecessarily obscure the embodiments. In addition, all embodiments may be used in combination with each other.

The first embodiment is as follows:

a controllable plain bearing, as shown in fig. 1-3, comprising a housing 1, a bearing assembly and a shaft 7, the housing 1 having a through hole therein, the bearing assembly being mounted in the through hole, the shaft 7 being journalled in the bearing assembly, and a lubricating film 4 between the bearing assembly and the shaft 7, wherein the bearing assembly comprises: a sliding bearing I2, a sliding bearing II 3 and a connecting part 6.

As shown in fig. 2 and 3, a sliding bearing one 2 is disposed in the through hole, which is located on the left side of the through hole. The sliding bearing I2 is provided with a convex ring I21 and a soft part I22, the diameter of the convex ring I21 is larger than that of the through hole, and the convex ring I21 is positioned on the left side of the through hole. The first flexible part 22 is arranged on the right side of the first convex ring 21, and the first flexible part 22 is attached to the left side of the bearing seat 1.

As shown in fig. 2 and 3, the sliding bearing two 3 is disposed in the through hole, and the sliding bearing two 3 is located at the right side of the through hole, and a gap is formed between the sliding bearing two 3 and the sliding bearing one 2. The sliding bearing II 3 is provided with a convex ring II 31 and a soft part II 32, the diameter of the convex ring II 31 is larger than that of the through hole, and the convex ring II 31 is positioned on the right side of the through hole. The second flexible part 32 is arranged on the left side of the second convex ring 31, and the second flexible part 32 is attached to the right side of the bearing seat 1.

As shown in fig. 3, the connecting portion 6 is made of soft and hard combined materials, so that relative movement between the first sliding bearing 2 and the second sliding bearing 3 is reduced to the greatest extent and the influence on the lubricating film 4 is reduced under the condition of limiting the size of the gap, the connecting portion 6 is of an annular structure, and the left end and the right end of the connecting portion 6 are connected with the first sliding bearing 2 and the second sliding bearing 3.

As shown in fig. 3, the adjustable sliding bearing further includes at least two expansion sleeves 5, the expansion sleeves 5 are of an elastic annular structure and are located between the bearing assembly and the bearing seat 1, the expansion sleeves 5 are sleeved on the first sliding bearing 2 and the second sliding bearing 3, the outer diameter surfaces of the expansion sleeves are attached to the wall surface of the through hole, expansion spaces are arranged inside the expansion sleeves 5, and the left side wall and the right side wall of the expansion sleeves 5 are recessed towards the direction of the expansion spaces.

The implementation steps are as follows: as shown in fig. 3 and 4, during the operation of the rotating shaft 7, the first protruding ring 21, the first soft part 22, the second protruding ring 31 and the second soft part 32 respectively abut against the left side and the right side of the bearing seat 1, and the transverse movement of the first sliding bearing 2 and the second sliding bearing 3 is limited. In the process, the rotating shaft 7 may be flexibly deformed due to a large external load, a high rotation speed, or a machining and installation error, which may occur to the rotating shaft 7. When the rotating shaft 7 is subjected to flexible deformation, the pressure applied by the rotating shaft 7 is borne by the first sliding bearing 2 and the second sliding bearing 3, the left lower part of the first sliding bearing 2 and the right upper part of the second sliding bearing 3 move and push the expansion sleeve 5 to deform and unload force, and meanwhile, the first sliding bearing 2 drives the upper end of the first sliding bearing and the second sliding bearing to drive the lower end of the first sliding bearing to synchronously move. Finally, in the process that one side of the expansion sleeve 5 is stressed, deformed and tightened, the other side, opposite to the expansion sleeve 5, of the expansion sleeve 5 is also subjected to the pulling force of the first sliding bearing 2 and the second sliding bearing 3 to form a stretching trend, and during stretching, the concave parts of the left side wall and the right side wall of the expansion sleeve 5 are gradually straightened to adapt to the deformation of the first sliding bearing 2 and the second sliding bearing 3.

First, this application sets up disconnect-type slide bearing 2 and slide bearing two 3 on bearing frame 1 respectively, be favorable to when the pressure that the bottom received axle journal left side bottom under slide bearing 2, can not use bearing frame 1 as the fulcrum, the lower bottom impact pivot 7 of prying slide bearing two 3, increase the gradient of pivot 7, disconnect-type slide bearing 2 and slide bearing two 3 of this application are for the slide bearing of integral type promptly, can reduce the impact to pivot 7, reduce the evenly distributed who destroys lubricating film 4 (oil film, gas film etc.) thickness.

Secondly, this application passes through the elasticity that inflation cover 5 has, when the stress of pivot 7 changes, through elastic relapse quick promotion extrusion lubricating film 4 for lubricating film 4 produces the flow power, further makes lubricating film 4 of each face tend to evenly, avoids the inhomogeneous distribution of lubricating film 4 (oil film, gas film etc.) thickness.

Third, lateral wall indent structure when pivot 7 slopes about this application through inflation cover 5, can be by slide bearing one 2, slide bearing two 3 stimulations, the part of lateral wall indent is straightened gradually about inflation cover 5 this moment, follow slide bearing one 2, slide bearing two 3's direction removes, tightly laminate and live slide bearing one 2, slide bearing two 3, avoid slide bearing one 2, appear the space between slide bearing two 3 and the inflation cover 5, increase the stability of 7 works of pivot, be favorable to the evenly distributed of lubricated membrane 4 (oil film, gas film etc.) thickness.

Preferably, the expansion sleeve 5 is fixed to the wall surface of the through hole.

Preferably, as shown in fig. 3, the expansion sleeve 5 has a convex structure extending toward the central axis of the rotating shaft 7, the sliding bearing 2 has a circular groove 23 on the outer surface, the convex structure is installed in the circular groove 23, the convex structure can slide in the circular groove 23, and the circular groove 23 limits the radial movement of the convex structure. The sliding bearing II 3 is provided with a second annular groove 33 on the outer surface, the convex structure is installed in the second annular groove 33, the convex structure can slide in the second annular groove 33, and the second annular groove 33 limits the radial movement of the convex structure.

When the first sliding bearing 2 and the second sliding bearing 3 are deformed under pressure, the stress in the rotating direction of the rotating shaft 7 is applied to a certain degree, the expansion sleeve 5 slides on the first sliding bearing 2 and the second sliding bearing 3, the bearing seat 1 keeps static relative to the first sliding bearing 2 and the second sliding bearing 3, the first sliding bearing 2 and the second sliding bearing 3 rotate automatically to drive the lubricating film 4 to flow, and the thickness of the lubricating film 4 is adjusted to be uniform.

More preferably, the convex structure is triangular or trapezoidal.

More preferably, the male formations are in sealing engagement with the first and second

annular grooves

23 and 33, respectively.

Preferably, the connection 6 seals the gap between the first plain bearing 2 and the second plain bearing 3. The lubricating oil of the lubricating film 4 is prevented from flowing into the gap, and the strength of the lubricating film 4 is reduced.

More preferably, the bearing seat 1, the expansion sleeve 5, the first sliding bearing 2, the second sliding bearing 3 and the connecting portion 6 constitute a closed independent space.

More preferably, the bearing seat 1 is further provided with an oil receiving port 11, and the oil receiving port 11 is communicated with the independent space. When the sliding bearing I2 and the sliding bearing II 3 are inclined by applying pressure to the rotating shaft 7, a part of air in the independent space can be discharged, so that a certain negative pressure value is generated in the independent space, and when the air sucked into the independent space flows, the sliding bearing I2 and the sliding bearing II 3 are assisted to rotate, and the thickness of the lubricating film 4 is adjusted to be uniform.

More preferably, as shown in fig. 5, the connecting portion 6 has a grease inlet 61 and a stopper portion 62, and the grease inlet 61 communicates the independent space with the space where the lubricating film 4 is located. The stopper 62 is made of a soft material, the stopper 62 is provided in the oil filler port 61, and the number of the stoppers 62 is at least two, and the stoppers are provided on both left and right sides of the oil filler port 61 and seal the oil filler port 61.

The oil injection system is connected into the oil receiving port 11 of the bearing seat 1, the oil injection system injects lubricating oil into the oil injection port 61 of the connecting part 6, the blocking part 62 is opened by the pressure of the lubricating oil injected by the oil injection system to inject the lubricating oil into the space of the lubricating film 4, the thickness of the lubricating film 4 is increased, the broken lubricating film 4 is repaired, and the fluidity of the lubricating film 4 is adjusted, so that the lubricating film tends to be complete and balanced.

More preferably, as shown in fig. 7, the stopper 62 is inclined toward the central axis direction of the rotating shaft 7. The blocking part 62 which inclines downwards is more and more compact when being impacted by the lubricating film 4 to deform upwards, and the oil filling port 61 is difficult to open, thereby being beneficial to ensuring the uniformity and stability of the thickness of the lubricating film 4.

Preferably, as shown in fig. 6, the bearing seat 1 further has an air inlet 12, and the air inlet 12 communicates with the expansion space of the expansion sleeve 5.

Adopt the air pressure device to insert the gas mouth 12 that connects of bearing frame 1, the inflation space to inflation cover 5 injects the air or takes out the air, adjustment inflation cover 5 is to slide bearing one 2, slide bearing two 3 pretightening pressure, in order to control pivot 7 different stress to slide bearing one 2, the influence of slide bearing two 3's deformation degree, when pivot 7 kinetic energy is great promptly, reduce the pretightening pressure of inflation cover 5, make slide bearing one 2, the distance between slide bearing two 3 and the bearing frame 1 is great, be favorable to avoiding slide bearing one 2, slide bearing two 3 takes place wearing and tearing with the direct contact of bearing frame 1. Or when the kinetic energy of the rotating shaft 7 is smaller, the shafting deformation is small, and the pre-tightening pressure of the expansion sleeve 5 is increased, so that the distances between the sliding bearing I2, the sliding bearing II 3 and the bearing seat 1 are slightly smaller, the working stability of the rotating shaft 7 is facilitated, and the influence on the uniformity of the thickness of the lubricating film 4 is further reduced.

A method of regulation comprising the steps of:

when the sliding bearing I2 and the sliding bearing II 3 are influenced by the kinetic energy of the rotating shaft 7 to move transversely, the convex ring I and the soft part I22 of the sliding bearing I2 and the convex ring II 31 and the soft part II 32 of the sliding bearing II 3 respectively abut against the left side and the right side of the bearing seat 1 to limit the transverse movement of the sliding bearing I2 and the sliding bearing II 3;

and bearing pressure is applied, and the sliding bearing I2 and the sliding bearing II 3 bear pressure applied by the shaft journal when the rotating shaft 7 is unevenly stressed and inclines.

And when the lower bottom of the sliding bearing I2 is stressed by the bottom of the left side of the shaft neck, the sliding bearing I moves and pushes the expansion sleeve 5 at the bottom of the left side to deform and unload force, and meanwhile, the lower bottom of the sliding bearing I2 drives the upper end of the sliding bearing I to synchronously move when stressed, similarly, the right side of the shaft neck also gives top pressure to the sliding bearing II 3, the sliding bearing II 3 moves and pushes the expansion sleeve 5 at the top of the right side to deform and unload force when stressed, and meanwhile, the top of the sliding bearing II 3 drives the lower end of the sliding bearing II to synchronously.

During stretching, in the process that one side of the expansion sleeve 5 is stressed, deformed and tightened, the other side, opposite to the expansion sleeve 5, of the expansion sleeve 5 is also subjected to the pulling force of the first sliding bearing 2 and the second sliding bearing 3 to form a stretching trend, and during stretching, the concave parts of the left side wall and the right side wall of the expansion sleeve 5 are gradually straightened to adapt to the deformation of the first sliding bearing 2 and the second sliding bearing 3.

Preferably, in the deforming step, there is further a step of:

and self-rotation, when the first sliding bearing 2 and the second sliding bearing 3 are deformed under pressure, the stress in the rotating direction of the rotating shaft 7 is applied to a certain degree, at the moment, the expansion sleeve 5 slides on the first sliding bearing 2 and the second sliding bearing 3, the bearing seat 1 keeps static relative to the first sliding bearing 2 and the second sliding bearing 3, the first sliding bearing 2 and the second sliding bearing 3 perform self-rotation to drive the lubricating film 4 to flow, and the uniformity of the lubricating film 4 is adjusted.

Preferably, in the regulation method, the method further comprises the steps of:

and (3) pressure regulation, namely, an air pressure device is connected into an air connecting port 12 of the bearing seat 1, air is injected into or exhausted out of an expansion space of the expansion sleeve 5, and the pre-tightening pressure of the expansion sleeve 5 on the sliding bearing I2 and the sliding bearing II 3 is regulated to control the influence of different stresses of the rotating shaft 7 on the deformation degree of the sliding bearing I2 and the sliding bearing II 3.

Preferably, in the deforming step, the method further comprises the steps of:

the oiling lubrication, insert the oiling system in the oil receiving port 11 of bearing frame 1, the oiling system pours into lubricating oil into to the oiling mouth 61 of connecting portion 6, opens blocking portion 62 and pours into lubricating oil into the space of lubricating film 4 through the pressure that the oiling system pours into lubricating oil into, increases the thickness of lubricating film 4, restores cracked lubricating film 4 and mobilizes the mobility of lubricating film 4, makes it tend to complete equilibrium.

Although the illustrative embodiments of the present invention have been described above to enable those skilled in the art to understand the present invention, the present invention is not limited to the scope of the embodiments, and it is apparent to those skilled in the art that all the inventive concepts using the present invention are protected as long as they can be changed within the spirit and scope of the present invention as defined and defined by the appended claims.

Claims

1. A regulatable plain bearing comprising a bearing housing having a through-hole therein, a bearing assembly mounted in the through-hole, and a shaft journalled in the bearing assembly with a lubrication film therebetween, wherein the bearing assembly comprises:

the sliding bearing I is arranged in the through hole and is positioned on the left side of the through hole, and the sliding bearing I is provided with:

the diameter of the first convex ring is larger than that of the through hole, and the first convex ring is positioned on the left side of the through hole;

the first soft part is arranged on the right side of the first convex ring and is attached to the bearing seat; the second sliding bearing is arranged in the through hole and positioned on the right side of the through hole, a gap is formed between the second sliding bearing and the first sliding bearing, and the second sliding bearing is provided with:

the diameter of the second convex ring is larger than that of the through hole, and the second convex ring is positioned on the right side of the through hole;

the second flexible part is arranged on the left side of the second convex ring and is attached to the bearing seat; the connecting part is of an annular structure, and the left end and the right end of the connecting part are connected with the first sliding bearing and the second sliding bearing;

the adjustable plain bearing further comprises:

at least two expansion sleeves, expansion sleeve is for having elastic loop configuration, and it is located between bearing assembly and the bearing frame, expansion sleeve suit is in slide bearing one with slide bearing two is last, its external diameter face laminating the wall of through-hole, expansion sleeve inside has:

and the left side wall and the right side wall of the expansion sleeve are inwards concave towards the expansion space.

2. The adjustable plain bearing according to claim 1, wherein the expansion sleeve is fixed to the wall surface of the through hole.

3. The adjustable sliding bearing according to claim 1, wherein the expansion sleeve has a convex structure extending toward the central axis of the rotating shaft, and the sliding bearing has:

the annular groove I is used for mounting the convex structure in the annular groove I, the convex structure can slide in the annular groove I, and the annular groove I limits the radial movement of the convex structure;

the outer surface of the second sliding bearing is provided with:

a second annular groove, the male structure being mounted in the second annular groove, the male structure being slidable in the second annular groove, the second annular groove limiting radial movement of the male structure.

4. A regulatable slide bearing according to claim 3, wherein the convex formation is triangular or trapezoidal.

5. A regulatable slide bearing according to claim 3, wherein the convex formations are in sealing engagement with the first and second annular grooves respectively.

6. The adjustable plain bearing of claim 1, wherein the connection seals the gap between the first plain bearing and the second plain bearing.

7. The adjustable sliding bearing according to claim 6, wherein the bearing seat, the expansion sleeve, the first sliding bearing, the second sliding bearing and the connecting portion constitute a closed independent space.

8. The adjustable plain bearing of claim 7, wherein the bearing housing further comprises:

and the oil receiving port is communicated with the independent space.

9. The adjustable plain bearing of claim 7, wherein the connecting portion has thereon:

the oil filling port is communicated with the independent space and the space where the lubricating film is located;

the stop part, the stop part is soft material, the stop part sets up in the oiling mouth, the stop part is two at least, and its setting is in the left and right sides of oiling mouth, it seals the oiling mouth.

10. The regulable plain bearing according to claim 9, wherein the blocking portion is inclined towards the direction of the centre axis of the spindle.