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

A static pressure bearing, breast roller shaking equipment and paper machine

Technical field

The present invention relates to the technical field of papermaking equipment, and in particular to a static pressure bearing, breast roller vibration equipment and a papermaking machine.

Background technique

The forming device, also known as the wire section, is the most important part of the paper machine. The paper page is formed on the paper stock suspension. The quality of the paper is closely related to the normal production part of the paper machine and the operation of the forming device. Once the wet paper web is formed in the forming device, the fiber interweaving state in the paper is basically finalized, and subsequent processes such as pressing, drying, and calendering can only improve the properties of the formed paper web to a limited extent.

The commonly used paper web forming device is the fourdrinier former, which includes a forming wire, and a breast roller connected to the forming wire, a forming plate, a grooved table roller, a table roller, a dewatering plate, a wet suction box, a vacuum suction box and other dewatering A network case composed of component racks. The breast roller is the first roller of the Fourdrinier wire former. Its function is to support the forming wire and dewater. The breast roller is a hollow cylindrical structure rolled from a thin plate. A rolling bearing is installed on the axle head of the breast roller, and the rolling bearing cooperates with the bearing seat.

A new type of breast roller is disclosed in Chinese patent application number: CN201310701244.8, which includes a frame, a bearing seat and a cylinder. The two ends of the cylinder are equipped with cast iron bulkheads. The cast iron bulkheads are equipped with a shaft head, and the shaft head passes through The rolling bearing is installed on the bearing seat, and the surface of the cylinder is provided with an anti-corrosion coating layer; one end of the shaft head is connected to the frame through a spring, and the other end of the shaft head is connected to a driving rod. The end of the driving rod is equipped with a roller. Contact with the flange of a cam structure.

The Chinese patent application number: CN201810883258.9 discloses a transverse fiber arrangement device used in the paper sheet making process. It belongs to the field of papermaking process production technology and includes a forming wire. A promoter is provided at the slurry injection position of the forming wire. The breast roller with fibers arranged laterally has a first sliding bearing on the right side of the breast roller and a second sliding bearing on the left side. The first sliding bearing is embedded in the first bearing box and the second sliding bearing is embedded in the second bearing box. In the bearing box, the first bearing box and the second bearing box are respectively fixed on the left and right sides of the breast roller bracket. A double-row rolling bearing is installed at the right end of the breast roller, and there is a connector on the outer ring of the double-row rolling bearing. The right end of the connecting body is laterally connected to a connecting rod, and the right end of the connecting rod is connected to a reciprocating mechanism for reciprocating motion.

In the prior art, rolling bearings are used to support the breast roller. Since the breast roller is large in size, has a high rotation speed, and needs to continuously move back and forth in the axial direction, the structure of the rolling bearing is easily damaged and has a short service life.

A hydrostatic bearing is disclosed in Chinese patent application number: CN202111197727. In the middle part of the shaft sleeve, the bearing outer shell is sleeved on the outside of the shaft sleeve. A working chamber is formed between the bearing outer shell and the shaft sleeve. A drive plate is provided inside the working chamber, and one side of the drive plate can slide. Several driving blocks are provided on the ground, and an adjusting plate is provided at one end of each driving block passing through the reserved hole on the shaft sleeve. This technical solution supports the main shaft installed in the shaft sleeve by forming an oil film on the inner wall of the shaft sleeve. 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 spindle was large, and the oil chamber could not form a close fit with the spindle, making it difficult to form a static pressure state and unable to effectively support the spindle.

In the prior art, rolling bearings are used to support breast rollers. After searching, the applicant has not found that hydrostatic bearings are used to support breast rollers. Moreover, even if it is assumed that the above-mentioned hydrostatic bearing is used to support the breast roller, it can be seen from the above analysis that it cannot effectively support the shaft head. In view of this, this application is filed.

Contents of the invention

In order to solve at least one technical problem existing in the background art, the present invention proposes a static pressure bearing, a breast roller shaking device and a paper machine.

A hydrostatic bearing proposed by the invention includes:

A shaft sleeve has a plurality of oil inlet chambers and oil return chambers on its inner wall. The plurality of oil inlet chambers are spaced around the circumference of the shaft sleeve; wherein, at least one of the oil inlet chambers is provided with an oil return chamber. Fitting piece, the side of the fitting piece close to the axis of the shaft sleeve has an arc surface, the distance between the arc surface and the axis of the shaft sleeve is R1; the inner diameter of the shaft sleeve is R2 ,0≤R2-R1≤0.02mm;

A housing is provided on the shaft sleeve, wherein the housing is provided with an oil inlet hole and an oil outlet hole, and the oil inlet hole is connected to the oil inlet chamber; the oil outlet hole is connected to the oil outlet hole. The oil return chamber is connected;

A first groove is provided on the outer wall of the shaft sleeve, and the first groove is connected to the oil inlet hole; a first through hole is provided on the shaft sleeve, and the first through hole is connected to the oil inlet hole. The first groove is connected to the oil inlet chamber, and a second groove is provided on the outer wall of the shaft sleeve; a second through hole is provided on the shaft sleeve, and the second through hole is connected to the oil inlet chamber. The second groove is connected to the oil inlet chamber, and the first through hole and the second through hole are both located at the matching piece.

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

Preferably, a plurality of the oil inlet chambers are provided on both sides of the oil return chamber.

Preferably, each of the oil inlet chambers is provided with the fitting piece.

Preferably, the outer wall of the shaft sleeve is provided with a first groove, and the first groove is connected with the oil inlet hole; the shaft sleeve is provided with a first through hole, and the first through hole is It is connected with the first groove and connected with the oil inlet chamber.

Preferably, a second groove is provided on the outer wall of the shaft sleeve; a second through hole is provided on the shaft sleeve, and the second through hole is connected with the second groove and with the inlet. The oil chamber is connected.

Preferably, the first through hole and the second through hole are both located at the fitting piece.

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

The invention also discloses a breast roller shaking device, which includes:

a bracket;

Two of the static pressure bearings are arranged on the bracket at intervals;

A breast roller, the shaft heads at both ends of which are respectively connected to the two static pressure bearings;

A shaking device, drivingly connected to the breast roller;

A rotating part used to drive the breast roller to rotate;

An oil supply mechanism is connected with the oil inlet hole and the oil outlet hole.

The invention also discloses a paper machine, including the breast roller shaking device.

The beneficial effects brought by one aspect disclosed by the present invention are:

After installing the shaft sleeve on the shaft head of the breast roller, after passing the hydraulic oil through the oil inlet hole, the hydraulic oil enters the oil inlet chamber, and an oil film is formed between the shaft head and the shaft sleeve, so that when the shaking is turned on, the breast roller It is separated from the static pressure bearing by a pressure oil film. The pressure on the surface of the friction pair is relatively uniform. The sliding resistance only comes from the viscosity of the fluid. The friction factor is small, the working life is long, and the reliability is high.

Description of drawings

Figure 1 is a front view of the cooperation between the breast roller and the static pressure bearing according to Embodiment 1 of the present invention;

Figure 2 is an axial view of the cooperation between the breast roller and the static pressure bearing according to Embodiment 1 of the present invention;

Figure 3 is a cross-sectional view of the cooperation between the breast roller and the static pressure bearing according to Embodiment 1 of the present invention;

Figure 4 is a partial cross-sectional view of the cooperation between the breast roller and the static pressure bearing according to Embodiment 1 of the present invention;

Figure 5 is an axial view of the hydrostatic bearing according to Embodiment 1 disclosed in the present invention;

Figure 6 is a cross-sectional view of the hydrostatic bearing according to Embodiment 1 disclosed in the present invention;

Figure 7 is a cross-sectional view of the bushing according to Embodiment 1 disclosed in the present invention;

Figure 8 is a partial schematic diagram of the shaft sleeve according to Embodiment 1 disclosed in the present invention;

Figure 9 is a front view of the shaft sleeve according to Embodiment 1 disclosed in the present invention;

Figure 10 is an axial view of the bushing according to Embodiment 1 disclosed in the present invention;

Figure 11 is a partial schematic view of the shaft sleeve disclosed in the present invention;

Figure 12 is an axial view of the bushing disclosed in the present invention;

Figure 13 is a partial cross-sectional view disclosed in the present invention;

Figure 14 is a partial cross-sectional view disclosed in the present invention;

Figure 15 is an axial view of the inner housing disclosed in the present invention;

Figure 16 is an axial view of the inner housing disclosed in the present invention;

Figure 17 is a partial axial view of the inner housing disclosed in the present invention;

Figure 18 is an axial view of the outer casing disclosed in the present invention;

Figure 19 is an axial view of the outer casing disclosed in the present invention;

Figure 20 is a cross-sectional view of the second hydrostatic bearing disclosed in the present invention;

Figure 21 is an axial view of Embodiment 2 disclosed in the present invention;

Figure 22 is a schematic diagram of the production of related products (schematic diagram of breast rollers, static pressure bearings, etc.);

Figure 23 is a schematic diagram of the related products produced (schematic diagram of breast roller, static pressure bearing, outer cover, etc.);

Figure 24 is a schematic diagram of the related products produced (schematic diagram of the bushing);

Figure 25 is a schematic diagram of the related products produced (schematic diagram of the inner shell);

Figure 26 is a schematic diagram of the related products produced (schematic diagram of oil pipe and outer shell);

Figure 27 is a schematic diagram of the related products produced (schematic diagram of the outer shell);

Figure 28 is a schematic diagram of the related products produced (schematic diagram of the inner casing and the outer casing).

Detailed ways

It should be noted that, without conflict, the embodiments and features in the embodiments of the present application can be combined with each other; below, the technical solutions in the embodiments of the present invention will be described in conjunction with the drawings in the embodiments of the present invention. Clearly and completely described, it is obvious that the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left" and "right" is based on that shown in the accompanying drawings. The orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

Embodiment 1, referring to Figures 1-20, a hydrostatic bearing A, B proposed by the present invention includes:

A shaft sleeve 1 is provided with a plurality of oil inlet chambers 101 and oil return chambers 102 on its inner wall. The plurality of oil inlet chambers 101 are distributed at intervals around the circumference of the shaft sleeve 1; wherein, at least one of the oil inlet chambers 101 is provided with a plurality of oil inlet chambers 101 and 102. There is a fitting piece 2 in the oil chamber 101. The fitting piece 2 has an arc surface 201 on one side close to the axis of the shaft sleeve 1. The distance between the arc surface 201 and the axis of the shaft sleeve 1 is The distance is R1; the inner diameter of the shaft sleeve 1 is R2, 0≤R2-R1≤0.02mm, the value of R2-R1 can be 0, 0.005, 0.01, 0.015, 0.02mm; the arc surface 201 can be connected with the shaft The inner wall of the sleeve 1 is on the same plane, and the arc surface 201 can also be made to protrude from the inner wall of the sleeve 1 .

A housing is provided on the shaft sleeve 1, wherein the housing is provided with an oil inlet hole 401 and an oil outlet hole 402, and the oil inlet hole 401 is connected with the oil inlet chamber 101; The oil hole 402 is connected with the oil return chamber 102 .

After the shaft sleeve 1 is installed on the shaft head Z of the breast roller When the shaking is turned on, the breast roller

Moreover, the oil film has the function of "homogenizing" errors and can reduce the impact of errors in manufacturing, so the requirements for machining accuracy are lower than that of rolling bearings. The static pressure bearings A and B can also establish a load-bearing oil film when the breast roller

Set the fitting 2, the distance between the arc surface 201 and the shaft head Z is 0.03-0.05mm, and can be 0.03, 0.035, 0.04, 0.045, 0.05mm; the distance between the arc surface 201 and the shaft head Z is small, forming a tight Cooperation can effectively form a static pressure state and effectively support the shaft head Z.

After many experiments, when the distance between the arc surface 201 and the shaft head Z is 0.03-0.05mm, sufficient static pressure support force can be guaranteed, and the multi-point support force formed can also be balanced. If the distance is too large, the static pressure load will not be enough to effectively support the shaft head. If the spacing is too small, the multi-point support force formed will be unbalanced. If the thickness of the oil film is too small, it cannot effectively resist external impact, which will cause the shaft head and the mating part to be in rigid contact, causing friction, destroying the oil film, and unable to form static pressure. Moreover, it cannot effectively take away the heat generated during operation, which affects the service life.

The axis of the arcuate surface 201 can be made coaxial with the axis of the shaft sleeve 1. In this way, a uniform oil film can be formed between the arcuate surface 201 and the shaft head Z to better support the shaft head Z.

The hydraulic oil in the oil inlet chamber 101 will enter the oil return chamber 102 through the gap between the shaft head Z, the shaft sleeve 1, and the arc surface 201, and then be discharged through the oil outlet hole 402 to form a passage. The breast roller X moves back and forth along the axis direction, which will generate a large amount of heat, which can be taken away by hydraulic oil.

As a further improvement of the above embodiment, in one embodiment, the oil return chamber 102 is arranged annularly along the circumferential direction of the shaft sleeve 1 . This can form a uniform oil film and provide uniform support. A plurality of oil inlet chambers 101 are provided on both sides of the oil return chamber 102 .

Four oil inlet chambers 101 can be provided on both sides of the oil return chamber 102. The oil inlet chambers 101 on each side are evenly spaced along the circumferential direction of the shaft sleeve 1. Such an arrangement can form a uniform oil film, which can effectively control the shaft head. Z provides even support.

As a further improvement of the above embodiment, in one embodiment, each of the oil inlet chambers 101 is provided with the fitting 2 . It better cooperates with the shaft head Z, and the oil film formed can effectively and evenly 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 wall of the shaft sleeve 1, and the first groove 103 is connected with the oil inlet hole 401; The sleeve 1 is provided with a first through hole 105 that communicates with the first groove 103 and the oil inlet chamber 101 .

The shaft sleeve 1 is provided with a first outlet 107 , and the first outlet 107 is connected with the oil return chamber 102 .

In this embodiment, the housing includes an inner housing 3 and an outer housing 4 . The outer shell 4 includes two half rings, which facilitates production and assembly.

The inner housing 3 is installed on the shaft sleeve 1 and fits closely 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 connected with the first groove 103. The second outlet 302 is connected with the first outlet 107 .

The outer side wall of the inner housing 3 is provided with first receiving grooves 303 distributed along its circumference, and the first receiving grooves 303 are connected with the second outlet 302 .

A positioning post 304 is also provided on the outer side wall of the inner housing 3. The positioning post 304 is located in the first receiving groove 303. Correspondingly, a positioning block 401 matching the positioning post 304 is provided on the inner side wall of the outer housing 4. During assembly, the positioning post 304 is connected to the positioning block 401 to facilitate the positioning of the inner housing 3 and the outer housing 4 .

The outer shell 4 is installed on the inner shell 3 , and the above-mentioned oil inlet 401 and oil outlet 402 are located on the outer shell 4 . The outer side wall of the inner housing 3 and the inner side wall of the outer housing 4 can both have spherical surfaces, so that a spherical fit is formed between the inner housing 3 and the outer housing 4 . Such an arrangement can make the installation between the inner housing 3 and the outer housing 4 simple and convenient. The inner housing 3 and the outer housing 4 can be installed and matched without much positioning adjustment. At the same time, when assembling with the shaft head Z of breast roller X, even if the two shaft heads Z at both ends of breast roller X have a certain error in the radial direction, that is, if the axis direction of breast roller The spherical fit formed by the shell 3 and the outer shell 4 can also effectively support the shaft head Z without affecting the reciprocating movement of the breast roller X along the axis.

Compared with cylindrical fittings, spherical fittings can be freely adjusted 360 degrees and can be more adaptable to various complex installation environments on site.

In the prior art, for example, application number: CN202111197727. If this prior art is installed on the breast roller, axial positioning and radial positioning are required, and the installation is complicated. At the same time, when cooperating with the shaft head Z, the installation requirements for the breast roller X are high. The axis of the breast roller X is required to be horizontal and cannot form an angle with the horizontal plane. Otherwise, the chest roller X will be affected to move back and forth along the axis. Moreover, the matching distance between the bushing and the shaft head is very small, requiring 0.03-0.05mm. If an annular surface fit is used, installation stress will easily occur during operation and the stability of operation will be destroyed.

Second receiving grooves 407 distributed along its circumferential direction are formed on the inner wall of the outer shell 4. The second receiving grooves 407 cooperate with the first receiving groove 303 to form an oil storage chamber C.

The hydrostatic bearing also includes an oil pipe 5. The oil pipe 5 is located in the oil storage chamber C. The first end of the oil pipe 5 is connected with the first inlet 301. Let the positioning post 304, the positioning block 401 and the oil pipe 5 be arranged in the oil storage chamber C to facilitate positioning and wiring. They do not need to be arranged outside the inner casing 3 and the outer casing 4, which facilitates packaging and transportation.

The outer shell 4 is provided with a second inlet 403 and a third outlet 404. The second inlet 403 is connected to the oil inlet 401 and the second end of the oil pipe 5. The third outlet 404 is connected with the oil storage chamber C and with the oil outlet hole 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 through the first groove 103 and the first through hole 105. inside the cavity 101.

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

As a further improvement of the above embodiment, in one implementation, the first trench 103 includes:

A first groove 1031 is annular and is arranged along the circumferential direction of the shaft sleeve 1; a plurality of second grooves 1032 is arranged at intervals along the circumferential direction of the shaft sleeve 1, and the length direction of the second grooves 1032 is in line with that of the shaft sleeve 1. The axis of the sleeve 1 is parallel, and the second groove 1032 is connected with the first groove 1031 and the first through hole 105 .

The hydraulic oil enters the second groove 1032 through the first groove 1031, and then enters the oil inlet chamber 101 through the first through hole 105.

The annular first groove 1031 and a plurality of second grooves 1032 arranged at intervals facilitate the hydraulic oil to quickly enter the different oil inlet chambers 101, quickly form an oil film, and evenly support the shaft head Z. The above-mentioned first groove 1031 and second groove 1032 also facilitate production and processing.

As a further improvement of the above embodiment, in one embodiment, a second groove 104 is provided on the outer wall of the shaft sleeve 1; a second through hole 106 is provided on the shaft sleeve 1, and the second through hole 106 is provided on the outer wall of the shaft sleeve 1. The hole 106 communicates with the second groove 104 and the oil inlet chamber 101 .

In the actual working process, at the beginning, the amount of hydraulic oil in each oil inlet chamber 101 may be different. The excess hydraulic oil can enter the second groove 104 through the second through hole 106 and be temporarily stored. When the shaft sleeve 1 and the shaft The different oil film pressures generated by head Z lead to uneven gaps. At this time, the oil temporarily stored in the second groove 104 can be adjusted and compensated in real time to achieve a final pressure balance in each oil chamber. Achieve effective adjustment and control of oil volume.

If the hydraulic oil in a certain oil inlet chamber 101 is insufficient, the hydraulic oil in the second groove 104 can flow back, or the hydraulic oil in other oil inlet chambers 101 can pass through the gap between the shaft head Z and the shaft sleeve 1. Replenish. In this way, it is ensured that the amount of oil in each oil inlet chamber 101 is basically uniform, which can provide uniform static pressure support for the shaft head Z and allow the shaft head Z to operate well.

As a further improvement of the above embodiment, in one embodiment, the second groove 104 extends along the circumferential direction of the sleeve 1 . It is convenient to store hydraulic oil, and can store as much hydraulic oil as possible to ensure that each oil chamber can form a uniform support force to support the shaft sleeve 1.

In this embodiment, eight fitting parts 2 are provided to closely cooperate with the shaft head Z to form an oil film to effectively support the shaft head Z. The eight matching parts 2 are the force balance points. The first through hole 105 and the second through hole 106 can both be located at the fitting 2, and the hydraulic oil can enter through the first through hole 105. The first through hole 105 is the output point, which is provided at the matching piece 2 to better support the shaft head Z. The second through hole 106 is located at the mating part 2 to better adjust the oil volume, form a uniform oil film, and better support the shaft head Z.

By arranging 8 fitting parts 2, the 8 fitting parts 2 are distributed in each oil inlet chamber and closely match with the shaft head Z to form an oil film to effectively support the shaft head Z. The matching area of the fitting parts 2 and the shaft head Z is small to avoid Excessive heat is generated during operation, which affects the service life.

Referring to Figure 21, a breast roller X shaking device is also disclosed in Embodiment 2, including:

A bracket 6; two static pressure bearings A and B, which are arranged at intervals on the bracket 6; a breast roller X, the shaft heads Z at both ends of which are connected to the two static pressure bearings A and B respectively; A shaking device 7 is connected to the breast roller X and can drive the breast roller X to reciprocate along the axial direction; a rotating part 8 is used to drive the breast roller X to rotate. The rotating part 8 can be a motor or a belt mechanism. ; An oil supply mechanism, connected 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 of existing technology, and the oil supply mechanism is not shown; the oil supply mechanism can be used to provide hydraulic oil into the oil inlet 401. The hydraulic oil discharged from the oil outlet 402 can also enter the oil supply mechanism.

The static pressure bearing of Embodiment 1 is used to support the breast roller X, and the static pressure bearings A and B have a long service life. The resistance to the chest roller is small and the working life is long.

The static pressure bearing installed on the shaft head Z on the working side of the breast roller Pressure bearing B.

A sealing ring 9 can be provided on both sides of the first hydrostatic bearing A. A water retaining 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 can be connected to the inner housing 3; the sealing ring 9, the inner housing 3 and the shaft sleeve 1 are enclosed to form a first chamber Q1.

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

The sealing ring 9 is provided with two annular first protrusions 902 that match the shaft head Z, which can effectively seal, avoid leakage, and also effectively improve the support strength.

The water retaining ring 10 is connected to the outer shell 4 to prevent water from entering. A baffle 11 is provided between the water retaining ring 10 and the sealing ring 9 . A second chamber Q2 is formed between the baffle 11, the sealing ring 9, the inner shell 3, and the outer shell 4. The second chamber Q2 communicates with the fourth outlet 901.

The outer shell 4 is provided with a fifth outlet 405, which is connected with the second chamber Q2 and the oil outlet 402.

During operation, hydraulic oil moves axially. The hydraulic oil enters the first chamber Q1 through the 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 storage chamber C will also leak through the gap between the inner casing 3 and the outer casing 4. The hydraulic oil will enter the second chamber Q2, and then be discharged through the fifth outlet 405 and the oil outlet 402.

The water retaining ring 10 is provided with two annular second protrusions 1001 that match the shaft head Z, which can effectively seal and effectively improve the support strength.

A notch 1002 may be provided on the water retaining ring 10 , and the notch 1002 is located between the two second protrusions 1001 . If there is hydraulic oil discharged through the gap 1002, it proves that there is a leak, and the maintenance personnel can find it in time to facilitate timely replacement of components. Components can also be inspected through the gap 1002.

A sealing ring 9, a baffle 11, and a water retaining ring 10 can be provided on the side of the second static pressure bearing B close to the body of the breast roller X. An outer cover 12 is provided on the other side, placed outside the shaft head Z and connected to the outer shell 4.

A first threaded hole 1201 may be provided on the outer cover 12 .

The outer shell 4 is provided with a sixth outlet 406 , and the sixth outlet 406 is connected with the outer cover 12 . The hydraulic oil moves laterally, enters the outer cover 12, and can be discharged through the sixth outlet 406.

By providing 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 that matches the bolt and the first threaded hole 1201. During transportation, the bolts are connected to the first threaded hole 1201 and the second threaded hole, and the breast roller X is fixed to the outer cover 12 to avoid axial movement of the breast roller X, axial shaking, and wear. Bolts and sealing plugs are not shown in the figure. The outer cover 12 and the connecting piece form a fixing part for fixing the breast roller X. Of course, those skilled in the art can also set up other detachable fixing parts to fix the chest roller X and the static pressure bearing during transportation, and then remove them during use.

During preparation, remove the bolts and install the sealing plug on the first threaded hole 1201 to form a seal. This avoids leakage.

In Embodiment 3, a paper machine is also disclosed, including the breast roller shaking device. The breast roller vibration equipment of this paper machine has a long service life and good effect.

The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can, within the technical scope disclosed in the present invention, implement the technical solutions of the present invention. Equivalent substitutions or changes of the inventive concept thereof shall be included in the protection scope of the present invention.

Claims (7)

1. A hydrostatic bearing, characterized in that it includes: A shaft sleeve has a plurality of oil inlet chambers and oil return chambers on its inner wall. The plurality of oil inlet chambers are spaced around the circumference of the shaft sleeve; at least one of the oil inlet chambers is provided with an oil return chamber. Fitting piece, the side of the fitting piece close to the axis of the shaft sleeve has an arc surface, the distance between the arc surface and the axis of the shaft sleeve is R1; the inner diameter of the shaft sleeve is R2 ,0≤R2-R1≤0.02mm; A housing is provided on the shaft sleeve, wherein the housing is provided with an oil inlet hole and an oil outlet hole, and the oil inlet hole is connected to the oil inlet chamber; the oil outlet hole is connected to the oil outlet hole. The oil return chamber is connected; A first groove is provided on the outer wall of the shaft sleeve, and the first groove is connected to the oil inlet hole; a first through hole is provided on the shaft sleeve, and the first through hole is connected to the oil inlet hole. The first groove is connected to the oil inlet chamber, and a second groove is provided on the outer wall of the shaft sleeve; a second through hole is provided on the shaft sleeve, and the second through hole is connected to the oil inlet chamber. The second groove is connected to the oil inlet chamber, and the first through hole and the second through hole are both located at the matching piece. 2. The hydrostatic bearing according to claim 1, wherein the oil return chamber is arranged annularly along the circumferential direction of the sleeve. 3. The hydrostatic bearing according to claim 2, wherein a plurality of the oil inlet chambers are provided on both sides of the oil return chamber. 4. The hydrostatic bearing according to claim 1, wherein the matching piece is provided in each of the oil inlet chambers. 5. The hydrostatic bearing according to claim 1, wherein the axis of the arcuate surface is coaxial with the axis of the sleeve. 6. A breast roller shaking device, characterized by including: a bracket; Two hydrostatic bearings according to any one of claims 1-5, spaced apart on the bracket; A breast roller, the shaft heads at both ends of which are respectively connected to the two static pressure bearings; A shaking device, drivingly connected to the breast roller; A rotating part used to drive the breast roller to rotate; An oil supply mechanism is connected with the oil inlet hole and the oil outlet hole. 7. A paper machine, characterized by comprising the breast roller shaking device as claimed in claim 6.