CN114457612B - Hydrostatic bearing, breast roll shake equipment and paper machine - Google Patents

Abstract

The invention discloses a hydrostatic bearing, comprising: the inner side wall of the shaft sleeve is provided with a plurality of oil inlet cavities and oil return cavities, and the plurality of oil inlet cavities are distributed at intervals around the circumference of the shaft sleeve; at least one oil inlet cavity is internally provided with a matching piece, one side of the matching piece, which is close to the axis of the shaft sleeve, is provided with an arc-shaped surface, and the distance between the matching piece and the axis of the shaft sleeve is R1; the inner diameter of the shaft sleeve is R2, R2-R1 is more than or equal to 0 and less than or equal to 0.02mm; the shell is arranged on the shaft sleeve, wherein the shell is provided with an oil inlet and an oil outlet, and the oil inlet is communicated with the oil inlet cavity; the oil outlet is communicated with the oil return cavity. After the shaft sleeve is arranged on the shaft head of the breast roll, after hydraulic oil is introduced through the oil inlet hole, the hydraulic oil enters the oil inlet cavity, and an oil film is formed between the shaft head and the shaft sleeve, so that when the shaking is started, the breast roll and the hydrostatic bearing are separated by a pressure oil film, the sliding resistance is only from fluid viscosity, the friction factor is small, and the service life is long.

Description

Hydrostatic bearing, breast roll shake equipment and paper machine

Technical Field

The invention relates to the technical field of papermaking equipment, in particular to a hydrostatic bearing, breast roll shaking equipment and a papermaking machine.

Background

The forming device, also called the wire section, is the most important part of the paper machine, on which the paper web is formed, and the quality of the formed paper and the normal production section of the paper machine are closely related to the operation of the forming device. Once the wet web is formed in the forming apparatus, the interwoven state of the fibers in the sheet is substantially set, and the subsequent pressing, drying, and calendering processes only provide limited improvement in the properties of the formed web.

The paper web forming device commonly used at present is a fourdrinier wire former, which comprises a forming wire, a breast roll connected with the forming wire, a forming plate, a grooved table roll, a dewatering plate, a wet suction box, a vacuum suction box and other dewatering element support. The breast roll is the first roll of the fourdrinier wire former and serves to hold the forming wire and dewater. The breast roll is the hollow tubular structure that the sheet metal is rolled up, installs antifriction bearing on the spindle nose of breast roll, antifriction bearing cooperates with the bearing frame.

In chinese patent application No.: CN201310701244.8 discloses a novel breast roll, which comprises a frame, a bearing seat and a cylinder, wherein both ends of the cylinder are provided with cast iron choke plugs, shaft heads are arranged in the cast iron choke plugs, the shaft heads are arranged on the bearing seat through rolling bearings, and an anti-corrosion coating layer is arranged on the surface of the cylinder; one end of the shaft head is connected with the frame through a spring, the other end of the shaft head is connected with a driving rod, the tail end of the driving rod is provided with a roller, and the roller is contacted with a flange of a cam structure.

In chinese patent application No.: the utility model discloses a device that transversely arranges of fibre for in paper sheet papermaking process, belong to papermaking technology production technical field, including the shaping net, be provided with the breast roll that promotes the fibre and transversely arrange in shaping net thick liquids injection position department, be provided with first slide bearing on the right side of breast roll, the left side is provided with second slide bearing, first slide bearing inlays in first bearing box, second slide bearing inlays in second bearing box, first bearing box and second bearing box are fixed respectively in the left and right sides of breast roll support, a biserial antifriction bearing is installed to breast roll's right side end department, the outer lane cover at biserial antifriction bearing has the connector, the right-hand member transverse connection of connector has the connecting rod, the right-hand member of connecting rod is connected with the reciprocating mechanism who is used for carrying out reciprocating motion.

In the prior art, the breast roller is supported by adopting the rolling bearing, and the breast roller has large size and high rotating speed, and needs to do reciprocating motion continuously in the axial direction, so that the structure of the rolling bearing is easy to damage, and the service life is short.

In chinese patent application No.: the utility model discloses a hydrostatic bearing in CN202111197727.X, including main shaft, axle sleeve, bearing shell body and two end caps, the axle sleeve inner wall equipartition has a plurality of oil pocket, and the main shaft wears to locate the middle part of axle sleeve, the bearing shell body cover is located the outside of axle sleeve, the bearing shell body with form the working chamber between the axle sleeve, the inside of working chamber is provided with the driving disk, one side of driving disk slidable is provided with a plurality of drive piece, and the one end that every drive piece passed the preformed hole on the axle sleeve all is provided with an regulating plate. According to the technical scheme, an oil film is formed on the inner side wall of the shaft sleeve, so that a main shaft arranged in the shaft sleeve is supported. However, the applicant found that, due to the formation of the oil chamber, the distance between the bottom wall of the oil chamber and the main shaft is large, and a tight fit cannot be formed between the bottom wall of the oil chamber and the main shaft, so that it is difficult to form a static pressure state, and the main shaft cannot be effectively supported.

In the prior art, breast rolls are supported by rolling bearings, and the applicant has not found that the breast rolls are supported by hydrostatic bearings after searching. Moreover, even if the above-described hydrostatic bearing is assumed to be applied to the support breast roll, it is known from the above analysis that it cannot effectively support the stub shaft. In view of this, the present application is proposed.

Disclosure of Invention

In order to solve at least one technical problem existing in the background technology, the invention provides a hydrostatic bearing, breast roll shaking equipment and a paper machine.

The invention provides a hydrostatic bearing, which comprises:

the inner side wall of the shaft sleeve is provided with a plurality of oil inlet cavities and oil return cavities, and the plurality of oil inlet cavities are distributed at intervals around the circumference of the shaft sleeve; at least one oil inlet cavity is internally provided with a matching piece, one side of the matching piece, which is close to the axis of the shaft sleeve, is provided with an arc surface, and the distance between the arc surface and the axis of the shaft sleeve is R1; the inner diameter of the shaft sleeve is R2, R2-R1 is more than or equal to 0 and less than or equal to 0.02mm;

the shell is arranged on the shaft sleeve, wherein the shell is provided with an oil inlet and an oil outlet, and the oil inlet is communicated with the oil inlet cavity; the oil outlet hole is communicated with the oil return cavity;

the outer side wall of the shaft sleeve is provided with a first groove which is communicated with the oil inlet; the shaft sleeve is provided with a first through hole which is communicated with the first groove and the oil inlet cavity, and the outer side wall of the shaft sleeve is provided with a second groove; the shaft sleeve is provided with a second through hole, the second through hole is communicated with the second groove and the oil inlet cavity, and the first through hole and the second through hole are both positioned at the matching piece.

Preferably, the oil return cavity is annularly arranged along the circumferential direction of the shaft sleeve.

Preferably, a plurality of oil inlet cavities are arranged on two sides of the oil return cavity.

Preferably, the matching piece is arranged in each oil inlet cavity.

Preferably, a first groove is formed in the outer side wall of the shaft sleeve, and the first groove is communicated with the oil inlet hole; the shaft sleeve is provided with a first through hole, and the first through hole is communicated with the first groove and the oil inlet cavity.

Preferably, a second groove is formed in the outer side wall of the shaft sleeve; the shaft sleeve is provided with a second through hole, and the second through hole is communicated with the second groove and the oil inlet cavity.

Preferably, the first through hole and the second through hole are both positioned at the matching piece.

Preferably, the axis of the arcuate surface is coaxial with the axis of the sleeve.

The invention also discloses breast roll shaking equipment, which comprises:

a bracket;

the two hydrostatic bearings are arranged on the bracket at intervals;

the shaft heads at the two ends of the breast roll are respectively connected with the two hydrostatic bearings;

the shaking device is in transmission connection with the breast roll;

the rotating part is used for driving the breast roll to rotate;

and the oil supply mechanism is communicated with the oil inlet and the oil outlet.

The invention also discloses a paper machine comprising the breast roll shaking equipment.

The beneficial effects brought by one aspect of the invention are as follows:

after the shaft sleeve is arranged on the shaft head of the breast roll, after hydraulic oil is introduced through the oil inlet hole, the hydraulic oil enters the oil inlet cavity, and an oil film is formed between the shaft head and the shaft sleeve, so that when the shaking is started, the breast roll and the hydrostatic bearing are separated by a pressure oil film, the pressure on the friction auxiliary surface layer is uniform, the sliding resistance is only from the viscosity of fluid, the friction factor is small, the service life is long, and the reliability is high.

Drawings

FIG. 1 is a front view of a breast roll and hydrostatic bearing fit of embodiment 1 of the present disclosure;

FIG. 2 is an axial view of the breast roll and hydrostatic bearing cooperation of embodiment 1 of the present disclosure;

FIG. 3 is a cross-sectional view of the breast roll and hydrostatic bearing cooperation of embodiment 1 of the present disclosure;

FIG. 4 is a partial cross-sectional view of the breast roll and hydrostatic bearing cooperation of embodiment 1 of the present disclosure;

FIG. 5 is an axial view of a hydrostatic bearing of embodiment 1 of the present disclosure;

FIG. 6 is a cross-sectional view of a hydrostatic bearing of embodiment 1 of the present disclosure;

FIG. 7 is a cross-sectional view of a sleeve of embodiment 1 of the present disclosure;

FIG. 8 is a partial schematic view of a sleeve according to embodiment 1 of the present disclosure;

FIG. 9 is a front view of a sleeve according to embodiment 1 of the present disclosure;

FIG. 10 is an axial view of a sleeve of embodiment 1 of the present disclosure;

FIG. 11 is a partial schematic view of a sleeve according to the present disclosure;

FIG. 12 is an axial view of a sleeve of the present disclosure;

FIG. 13 is a partial cross-sectional view of the present disclosure;

FIG. 14 is a partial cross-sectional view of the present disclosure;

FIG. 15 is an axial view of the inner housing of the present disclosure;

FIG. 16 is an axial view of the inner housing of the present disclosure;

FIG. 17 is a partial axial view of the inner housing of the present disclosure;

FIG. 18 is an axial view of the outer housing of the present disclosure;

FIG. 19 is an axial view of the outer housing of the present disclosure;

FIG. 20 is a cross-sectional view of a second hydrostatic bearing of the present disclosure;

FIG. 21 is an axial view of embodiment 2 of the present disclosure;

fig. 22 is a schematic view of production related products (schematic view of breast rolls, hydrostatic bearings, etc.);

FIG. 23 is a schematic representation of the relevant product produced (schematic representation of breast rolls, hydrostatic bearings, housing, etc.);

FIG. 24 is a schematic view of a related product produced (schematic view of a sleeve);

FIG. 25 is a schematic view of the related products produced (schematic view of the inner housing);

FIG. 26 is a schematic of the relevant product produced (schematic of tubing, outer housing);

FIG. 27 is a schematic illustration of the relevant product produced (schematic illustration of the outer housing);

fig. 28 is a schematic view of the relevant product produced (schematic view of the inner and outer shells).

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other; the following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left" and "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the positions or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Embodiment 1, referring to fig. 1-20, a hydrostatic bearing A, B according to the present invention comprises:

the oil inlet cavity 101 and the oil return cavity 102 are arranged on the inner side wall of the shaft sleeve 1, and the plurality of oil inlet cavities 101 are distributed at intervals around the circumference of the shaft sleeve 1; wherein, a mating piece 2 is arranged in at least one oil inlet cavity 101, one side of the mating piece 2 close to the axis of the shaft sleeve 1 is provided with an arc surface 201, and the distance between the arc surface 201 and the axis of the shaft sleeve 1 is R1; the inner diameter of the shaft sleeve 1 is R2, R2-R1 is more than or equal to 0 and less than or equal to 0.02mm, and the values of R2-R1 can be 0, 0.005, 0.01, 0.015 and 0.02mm; the arc surface 201 may be in the same plane as the inner side wall of the sleeve 1, or the arc surface 201 may protrude from the inner side wall of the sleeve 1.

The shell is arranged on the shaft sleeve 1, wherein an oil inlet 401 and an oil outlet 402 are formed in the shell, and the oil inlet 401 is communicated with the oil inlet cavity 101; the oil outlet hole 402 communicates with the oil return chamber 102.

After the shaft sleeve 1 is arranged on the shaft head Z of the breast roll X, after hydraulic oil is introduced through the oil inlet hole 401, the hydraulic oil enters the oil inlet cavity 101, and an oil film is formed between the shaft head Z and the shaft sleeve 1, so that when shaking is started, the breast roll X and the hydrostatic bearing are separated by a pressure oil film, the pressure on the friction auxiliary surface layer is relatively uniform, the sliding resistance is only from the viscosity of fluid, the friction factor is small, the service life is long, and the reliability is high.

The oil film has the function of homogenizing errors, and can reduce the influence caused by errors in manufacturing, so the requirement on processing precision is lower than that of a rolling bearing. The hydrostatic bearing A, B can also establish a bearing oil film under the state that the breast roll X is completely static, can ensure that the friction auxiliary surface layer is not directly contacted at the starting stage, and avoids damaging the hydrostatic bearing and the shaft head Z at the starting stage.

The matching piece 2 is arranged, the distance between the arc-shaped surface 201 and the shaft head Z is 0.03-0.05mm, and can be 0.03, 0.035, 0.04, 0.045 and 0.05mm; the space between the arc-shaped surface 201 and the shaft head Z is small, so that a tight fit is formed, a static pressure state can be effectively formed, and the shaft head Z is effectively supported.

Through a plurality of experiments, when the distance between the arc-shaped surface 201 and the shaft head Z is 0.03-0.05mm, enough static pressure supporting force can be ensured, and the formed multipoint supporting force can be balanced. And if the distance is too large, the static pressure load is insufficient, and the shaft heads cannot be effectively supported. The spacing is too small, and the formed multipoint supporting force is unbalanced. The thickness of the oil film is too small, external impact cannot be effectively resisted, the shaft head and the matching piece are in rigid contact, friction is formed, the oil film is damaged, and static pressure cannot be formed. And heat generated in operation cannot be effectively taken away, so that the service life is influenced.

The axis of the arc-shaped surface 201 and the axis of the shaft sleeve 1 are coaxial, so that a uniform oil film is formed between the arc-shaped surface 201 and the shaft head Z, and the shaft head Z is better supported.

The hydraulic oil in the oil inlet cavity 101 enters the oil return cavity 102 through the gap between the shaft head Z and the shaft sleeve 1 and the arc surface 201, and then is discharged through the oil outlet hole 402 to form a passage. The breast roll X reciprocates along the axis direction, can produce a large amount of heat, can utilize hydraulic oil to take away.

As a further improvement of the above example, in one embodiment, the oil return chamber 102 is annularly arranged along the circumferential direction of the sleeve 1. This can form a uniform oil film and provide uniform supporting force. A plurality of oil inlet cavities 101 are respectively arranged on two sides of the oil return cavity 102.

The oil inlet cavities 101 can be uniformly distributed along the circumferential direction of the shaft sleeve 1 at intervals, so that a uniform oil film can be formed, and uniform supporting force can be provided for the shaft head Z.

As a further development of the above-described embodiment, in one embodiment, the fitting 2 is provided in each of the oil feed chambers 101. Better closely match with the shaft head Z, and the formed oil film can effectively and uniformly support the shaft head Z.

As a further improvement of the above embodiment, in one embodiment, a first groove 103 is provided on the outer sidewall of the sleeve 1, and the first groove 103 communicates with the oil inlet 401; the shaft sleeve 1 is provided with a first through hole 105, and the first through hole 105 is communicated with the first groove 103 and the oil inlet cavity 101.

The sleeve 1 is provided with a first outlet 107, and the first outlet 107 is communicated with the oil return cavity 102.

In this embodiment, the housing includes an inner housing 3 and an outer housing 4. The outer shell 4 comprises two semi-rings, which is convenient for production and assembly.

The inner shell 3 is arranged on the shaft sleeve 1 and is tightly matched with the shaft sleeve 1.

The inner housing 3 is provided with a first inlet 301 and a second outlet 302, and the first inlet 301 is communicated with the first groove 103. The second outlet 302 communicates with the first outlet 107.

The outer side wall of the inner housing 3 is provided with first accommodation grooves 303 distributed along the circumferential direction thereof, and the first accommodation grooves 303 communicate with the second outlet 302.

The outer side wall of the inner shell 3 is also provided with a positioning column 304, the positioning column 304 is positioned in the first accommodating groove 303, and correspondingly, the inner side wall of the outer shell 4 is provided with a positioning block 401 matched with the positioning column 304. When the positioning device is assembled, the positioning column 304 is connected with the positioning block 401, so that the inner shell 3 and the outer shell 4 are positioned conveniently.

The outer casing 4 is mounted on the inner casing 3, and the oil inlet 401 and the oil outlet 402 are located on the outer casing 4. The outer side wall of the inner shell 3 and the inner side wall of the outer shell 4 can be provided with spherical surfaces, and spherical surface matching is formed between the inner shell 3 and the outer shell 4. The arrangement can lead the installation between the inner shell 3 and the outer shell 4 to be simple and convenient. The inner shell 3 and the outer shell 4 can be assembled and matched without more positioning adjustment. Meanwhile, when the breast roll X is assembled with the shaft heads Z of the breast roll X, even if two shaft heads Z at two ends of the breast roll X have certain errors in the radial direction, namely, the axis direction of the breast roll X has a certain angle with the horizontal plane, the shaft heads Z can be effectively supported by enabling the inner shell 3 and the outer shell 4 to form spherical surface fit, and the reciprocating movement of the breast roll X along the axis is not influenced.

Compared with the matching of a cylinder and the like, the spherical matching can be freely adjusted by 360 degrees, and can be more suitable for various complex installation environments on site.

In the prior art, for example, application number: in cn202111197727.X, only one outer casing is provided, and the outer casing is connected to the shaft sleeve, and the outer casing and the shaft sleeve are matched by an annular surface. If the prior art is installed on the breast roll, axial positioning and radial positioning are required, and the installation is complex. Meanwhile, when the breast roll X is matched with the shaft head Z, the mounting requirement on the breast roll X is high, the axis of the breast roll X is required to be horizontal, and an angle cannot be formed between the axis and the horizontal plane. Otherwise, the reciprocating movement of the breast roll X along the axis is affected. Moreover, the matching distance between the shaft sleeve and the shaft head is very small, and the matching distance is required to be 0.03-0.05mm. If the annular surface is used for matching, installation stress is very easy to generate in the running process, and the running stability is damaged.

The inner side wall of the outer case 4 is formed with second accommodation grooves 407 distributed in the circumferential direction thereof, and the second accommodation grooves 407 cooperate with the first accommodation grooves 303 to form the oil reservoir chamber C.

The hydrostatic bearing further includes an oil pipe 5, the oil pipe 5 being located in the oil reservoir C, a first end of the oil pipe 5 being in communication with the first inlet 301. The positioning column 304, the positioning block 401 and the oil pipe 5 are arranged in the oil storage chamber C, so that the positioning and wiring are convenient, the outer sides of the inner shell 3 and the outer shell 4 are not required, and the packaging and the transportation are convenient.

The outer shell 4 is provided with a second inlet 403 and a third outlet 404, and the second inlet 403 is communicated with the oil inlet 401 and the second end of the oil pipe 5. The third outlet 404 communicates with the oil reservoir chamber C and with the oil outlet 402.

The external hydraulic oil enters the second inlet 403 through the oil inlet hole 401, then enters the first inlet 301 through the oil pipe 5, then enters the first groove 103, and then enters the oil inlet cavity 101 through the first groove 103 and the first through hole 105.

The hydraulic oil in the oil inlet cavity 101 enters the oil return cavity 102 through a gap between the shaft head Z and the shaft sleeve 1, then enters the oil storage chamber C through the first outlet 107 and the second outlet 302, and then is discharged through the third outlet 404 and the oil outlet 402.

As a further improvement to the above example, in one embodiment, the first trench 103 includes:

a first groove 1031, which is annular, is disposed along the circumferential direction of the sleeve 1; a plurality of second grooves 1032 are arranged at intervals along the circumferential direction of the sleeve 1, the length direction of the second grooves 1032 is parallel to the axis of the sleeve 1, and the second grooves 1032 communicate with the first grooves 1031 and with the first through holes 105.

The hydraulic oil passes through the first groove 1031 to enter the second groove 1032, and then passes through the first through hole 105 to enter the oil intake chamber 101.

The annular first grooves 1031 and the second grooves 1032 which are arranged at intervals facilitate hydraulic oil to quickly enter different oil inlet cavities 101, quickly form an oil film and can uniformly support the shaft head Z. The first and second grooves 1031 and 1032 are also convenient to manufacture.

As a further development of the above example, in one embodiment, the outer side wall of the sleeve 1 is provided with a second groove 104; the shaft sleeve 1 is provided with a second through hole 106, and the second through hole 106 is communicated with the second groove 104 and the oil inlet cavity 101.

In the actual working process, the amount of hydraulic oil in each oil inlet cavity 101 may be different at the beginning, and redundant hydraulic oil may enter the second groove 104 through the second through hole 106 for temporary storage, so that when the oil film pressure generated by the shaft sleeve 1 and the shaft head Z is different, the gap is uneven, and at this time, the oil temporarily stored in the second groove 104 can be adjusted and compensated in real time, so as to achieve the pressure balance of each oil cavity finally. And realizing effective regulation and control of oil quantity.

If the hydraulic oil in one oil inlet cavity 101 is insufficient, the hydraulic oil in the second groove 104 can flow back, and the hydraulic oil in the other oil inlet cavities 101 can be supplemented through the gap between the shaft head Z and the shaft sleeve 1. In this way, the oil quantity in each oil inlet cavity 101 is ensured to be basically uniform, so that uniform static pressure supporting force can be provided for the spindle head Z, and the spindle head Z can well run.

As a further improvement to the above-described embodiment, in one embodiment, the second groove 104 extends in the circumferential direction of the sleeve 1. The hydraulic oil can be stored conveniently, so that the hydraulic oil can be stored as much as possible, and the oil cavities can form uniform supporting force to support the shaft sleeve 1.

In the embodiment, 8 matching pieces 2 are arranged to be tightly matched with the shaft head Z, so that the oil film effectively supports the shaft head Z. The 8 matching pieces 2 are stress balance points. The first through hole 105 and the second through hole 106 can be located at the fitting 2, and hydraulic oil can enter through the first through hole 105. The first through hole 105 is a force-out point and is arranged at the matching piece 2, so that the shaft head Z is better supported. The second through hole 106 is located at the matching piece 2, and oil mass adjustment is better performed, so that a uniform oil film is formed, and the shaft head Z is better supported.

Through setting up 8 fittings 2,8 fittings 2 distribute in each oil inlet chamber, closely cooperate with spindle nose Z, form oil film effective support spindle nose Z, fitting 2 and spindle nose Z cooperation area are little, produce too much heat when avoiding the operation, influence life.

Referring to fig. 21, also disclosed in embodiment 2 is a breast roll X shaking apparatus comprising:

a bracket 6; two hydrostatic bearings A, B spaced apart from each other on the frame 6; the shaft heads Z at two ends of the breast roll X are respectively connected with the two hydrostatic bearings A, B; the shaking device 7 is in transmission connection with the breast roll X and can drive the breast roll X to reciprocate along the axial direction; the rotating part 8 is used for driving the breast roll X to rotate, and the rotating part 8 can be a motor and a belt mechanism; and the oil supply mechanism is communicated with the oil inlet hole 401 and the oil outlet hole 402. The rotating part 8, the shaking device 7 and the oil supply mechanism can be the prior art, and the oil supply mechanism is not shown; the oil feed mechanism may be utilized to supply hydraulic oil into the oil feed hole 401. Hydraulic oil discharged from the oil outlet hole 402 may also enter the oil supply mechanism.

The hydrostatic bearing of example 1 was used to support breast roll X, and hydrostatic bearing A, B was long in service life. The resistance to the breast roller X is small and the service life is long.

The hydrostatic bearing arranged on the shaft head Z at the working side of the breast roll X is defined as a first hydrostatic bearing A, and is arranged close to the shaking device; the hydrostatic bearing on the stub shaft Z on the other side is defined as a second hydrostatic bearing B.

A sealing ring 9 may be provided on both sides of the first hydrostatic bearing a. A water stop ring 10 is provided on both sides of the two sealing rings 9. The sealing ring 9 and the water retaining ring 10 are arranged on the shaft head.

The sealing ring 9 may be connected with the inner housing 3; the sealing ring 9 encloses with the inner housing 3 and the shaft sleeve 1 to form a first chamber Q1.

The seal ring 9 is provided with a fourth outlet 901, and the fourth outlet 901 communicates with the first chamber Q1.

The sealing ring 9 is provided with two annular first protrusions 902 matched with the shaft head Z, so that the sealing ring can be effectively sealed, leakage is avoided, and the supporting strength can be effectively improved.

The water blocking ring 10 is connected with the outer housing 4 to prevent water from entering. A baffle 11 is arranged between the water blocking ring 10 and the sealing ring 9. The baffle 11 forms a second chamber Q2 with the sealing ring 9, the inner housing 3 and the outer housing 4. The second chamber Q2 communicates with the fourth outlet 901.

The outer casing 4 is provided with a fifth outlet 405, and the fifth outlet 405 communicates with the second chamber Q2 and the oil outlet 402.

During operation, the hydraulic oil will move in an axial direction. The hydraulic oil enters the first chamber Q1 through a gap between the shaft head Z and the shaft sleeve 1, then enters the second chamber Q2 through the fourth outlet 901, and then is discharged through the fifth outlet 405 and the oil outlet 402.

The hydraulic oil in the oil reservoir C also leaks through the gap between the inner and outer casings 3, 4, and the hydraulic oil enters the second chamber Q2 and is then discharged through the fifth outlet 405, 402.

The water retaining ring 10 is provided with two annular second bulges 1001 matched with the shaft head Z, so that the sealing can be effectively realized, and the supporting strength can be effectively improved.

A notch 1002 may be provided on the water deflector ring 10, the notch 1002 being located between the two second protrusions 1001. If hydraulic oil is discharged through the notch 1002, leakage is proved, and an maintainer can find the leakage in time, so that the parts can be replaced conveniently in time. Component inspections may also be performed through the notch 1002.

A sealing ring 9, a baffle plate 11 and a water retaining ring 10 can be arranged on one side of the second hydrostatic bearing B close to the breast roll X body. And the other side is provided with an outer cover 12 which is arranged on the outer side of the shaft head Z and is connected with the outer shell 4.

A first threaded hole 1201 may be provided in the housing 12.

The outer housing 4 is provided with a sixth outlet 406, which sixth outlet 406 communicates with the outer envelope 12. The hydraulic oil moves laterally into the housing 12 and can be discharged through the sixth outlet 406.

By arranging a connecting piece and a sealing plug, the connecting piece can be a bolt. The shaft head Z is provided with a second threaded hole matched with the bolt and the first threaded hole 1201. In the transportation, let the bolt be connected with first screw hole 1201, second screw hole, let breast roll X and dustcoat 12 fixed, avoid breast roll X axial displacement, avoid along axial rocking, avoid wearing and tearing. Bolts and sealing plugs are not shown in the drawings. The cover 12 and the connector form a fixing portion for fixing the breast roll X. Of course, those skilled in the art can also provide other detachable fixing parts, and the breast roll X and the hydrostatic bearing can be fixed during transportation and can be removed during use.

In preparation for the operation, the bolts are removed and the sealing plug is mounted in the first threaded hole 1201 to form a seal. Thus avoiding leakage.

Also disclosed in example 3 is a paper machine comprising said breast roll shaking apparatus. The breast roll shaking equipment of the paper machine has long service life and good effect.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims (7)

1. A hydrostatic bearing, comprising:

the inner side wall of the shaft sleeve is provided with a plurality of oil inlet cavities and oil return cavities, and the plurality of oil inlet cavities are distributed at intervals around the circumference of the shaft sleeve; wherein, at least one oil inlet cavity is internally provided with a matching piece, one side of the matching piece, which is close to the axis of the shaft sleeve, is provided with an arc surface, and the distance between the arc surface and the axis of the shaft sleeve is R1; the inner diameter of the shaft sleeve is R2, R2-R1 is more than or equal to 0 and less than or equal to 0.02mm;

the shell is arranged on the shaft sleeve, wherein the shell is provided with an oil inlet and an oil outlet, and the oil inlet is communicated with the oil inlet cavity; the oil outlet hole is communicated with the oil return cavity;

the outer side wall of the shaft sleeve is provided with a first groove which is communicated with the oil inlet; the shaft sleeve is provided with a first through hole which is communicated with the first groove and the oil inlet cavity, and the outer side wall of the shaft sleeve is provided with a second groove; the shaft sleeve is provided with a second through hole, the second through hole is communicated with the second groove and the oil inlet cavity, and the first through hole and the second through hole are both positioned at the matching piece.

2. The hydrostatic bearing of claim 1, wherein said scavenge chambers are annularly arranged along a circumferential direction of said sleeve.

3. The hydrostatic bearing of claim 2, wherein a plurality of said oil inlet chambers are provided on both sides of said oil return chamber.

4. The hydrostatic bearing of claim 1, wherein said mating members are disposed within each of said oil intake chambers.

5. The hydrostatic bearing of claim 1, wherein an axis of said arcuate surface is coaxial with an axis of said sleeve.

6. A breast roll shaking apparatus comprising:

a bracket;

two hydrostatic bearings according to any one of claims 1-5, spaced apart on said carrier;

the shaft heads at the two ends of the breast roll are respectively connected with the two hydrostatic bearings;

the shaking device is in transmission connection with the breast roll;

the rotating part is used for driving the breast roll to rotate;

and the oil supply mechanism is communicated with the oil inlet and the oil outlet.

7. A paper machine comprising the breast roll shaking apparatus of claim 6.