A hydrostatic bearing

Abstract

The application provides a kind of static pressure bearing, it is related to rotary machinery technical field, to solve the locking mode of existing static pressure bearing There is great limitation, when it cannot reach complete sealing, it is easy to cause static pressure bearing damage, and the installation and replacement of bearing are more complicated technical problems.The device comprises a first body, a second body and a connecting structure arranged between the first body and the second body, wherein the connecting structure comprises a first connecting structure and a second connecting structure arranged inside the first connecting structure, and an air passage is arranged between the first connecting structure and the second connecting structure; a sealing structure is arranged between the end of the second body and the first body, the application is used to improve the service life of static pressure bearing, and is convenient to install, can be repeatedly replaced without damage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rotating machinery, in particular to a static pressure bearing. BACKGROUND

[0002] The static pressure bearing is a sliding bearing that uses an externally supplied high-pressure gas source to suspend a rotor shaft by using the static pressure of a special structure of graphite.

[0003] Generally, the static pressure bearing uses high-pressure gas supplied by an external gas source as a working medium and lubricant, uses the space for gap cooperation between the rotor shaft and the bearing, and forms a gas film between the relatively rotating parts by the external high-pressure gas, so that a high-pressure gas film is generated between the relatively rotating parts (the rotor and the bearing) under the action of graphite, which can support the load.

[0004] However, the static pressure bearing has the defects of poor gas sealing and inability to pass through the graphite plane for mechanical cooperation. Once the sealing effect is poor and the bearing leaks, the rotor will lose the suspension state, and thus the suspension function of the static pressure bearing itself will be lost. Therefore, the sealing ability of the bearing is an important technical index for evaluating the static pressure bearing.

[0005] The existing static pressure bearing is mainly sealed by the guide angle adhesive of the cooperation between the graphite layer and the metal base or the adhesive of the cooperation surface between the graphite layer and the metal base. In particular, the radial static pressure bearing cannot be mechanically cooperated by an effective locking method, but can only be locked by precise cooperation and bottom adhesive.

[0006] The applicant finds that the existing technology at least has the following technical problems:

[0007] The current locking method has great limitations. For example, if the gas pressure is too high, or the environmental temperature is too high, or the adhesive is aged, or the sealing structure of the bearing cannot achieve complete sealing when working, the graphite layer will be easily broken or the adhesive surface between the graphite layer and the metal base will be separated, resulting in damage to the static pressure bearing. Moreover, due to the fragile nature of graphite, mechanical cooperation cannot be performed on the graphite layer structure, making the installation and replacement of the bearing more complicated, and even in some devices, the static pressure bearing cannot be replaced. SUMMARY

[0008] The present application aims to provide a kind of static pressure bearing, to solve the current locking mode in prior art exists There is great limitation, such as excessive air pressure, or high ambient temperature, or adhesive aging, or bearing works when the sealing structure cannot reach complete sealing, all easily cause the breakage of graphite layer or the separation of graphite layer and metal base mating surface adhesive surface, leading to static pressure bearing damage. And due to the fragile nature of graphite itself, mechanical cooperation cannot be carried out on the graphite layer structure, so that the installation and replacement of bearing are more complicated, and even there is no technical problem to replace static pressure bearing on some equipment 。 The preferred technical solutions in the many technical solutions provided by the present application can produce many technical effects, which are described below.

[0009] To achieve the above object, the present application provides the following technical solutions.

[0010] The present application provides a kind of static pressure bearing, comprising first body, second body and the connecting structure between the first body and the second body, wherein:

[0011] The connecting structure includes first connecting structure and second connecting structure arranged inside the first connecting structure, and a ventilation cavity is arranged between the first connecting structure and the second connecting structure.

[0012] The end of the second body and the first body are provided with sealing structure.

[0013] Preferably, the first body is provided with accommodating structure, and the second body is connected in the accommodating structure, wherein:

[0014] The ventilation cavity is arranged on the first surface of the second body, and a plurality of support structures are arranged in the ventilation cavity.

[0015] The end surface of the support structure and the accommodating structure, the first surface and the accommodating structure are respectively provided with the first connecting structure and the second connecting structure.

[0016] Preferably, the accommodating structure is further provided with a second groove structure corresponding to the support structure, for accommodating the support structure, and the first connecting structure is arranged between the top end surface of the support structure and the bottom surface of the second groove structure.

[0017] Preferably, the ventilation cavity is circumferentially arranged on the surface of the second body, and the support structure adopts boss, and a plurality of bosses are uniformly distributed in the ventilation cavity.

[0018] Preferably, the first connecting structure and the second connecting structure are both adhesive layer, and the sealing structure is glue filling layer, wherein:

[0019] An edge of the accommodating structure and an end of the second body form a glue pouring opening;

[0020] A glue pouring groove is arranged on the first body and communicates with the glue pouring opening, and a depth of the glue pouring groove is not less than a depth of the accommodating structure.

[0021] Preferably, the second surface of the second body protrudes from the first body.

[0022] Preferably, the first body is a metal structure, and the second body is a graphite structure.

[0023] Preferably, an air source inlet is further arranged on the first body and arranged in communication with the air cavity, wherein:

[0024] The air source inlet is a through hole arranged on the first body.

[0025] Preferably, the air source inlet comprises a first hole structure and a second hole structure arranged in communication, wherein:

[0026] The first hole structure is a threaded hole, and the second hole structure is a through hole.

[0027] Preferably, the first hole structure is an M3 threaded hole, and the second hole structure is a through hole with a diameter of 2 mm.

[0028] The static pressure bearing provided by the application, by arranging the air cavity at the fitting surface between the first body and the second body, under the action of the air cavity, the gas delivered by the external high-pressure gas source can be more uniformly distributed on the circumference of the second body made of graphite material, and then by the property of the porous material of graphite, the air floating effect is formed on the second surface of the second body, and by arranging the sealing structure between the end of the second body and the first body, the space between the inner and outer fitting ports of the first body and the second body is filled, so that the space is sealed and interlocking is formed, which is beneficial to improve the service life of the static pressure bearing, and facilitates installation and non-damageable repeated replacement. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0030] Figure 1 is a structural schematic diagram of the static pressure bearing in the first embodiment of the present application;

[0031] Figure 2 isFigure 1 A schematic diagram of the AA cross-sectional structure;

[0032] Figure 3 yes Figure 2 Enlarged structural diagram at point I;

[0033] Figure 4 yes Figure 2 Enlarged structural diagram at point II;

[0034] Figure 5 yes Figure 1 A schematic diagram of the structure of the first main body in the middle;

[0035] Figure 6 yes Figure 5 A schematic diagram of the AA cross-sectional structure.

[0036] Figure 7 yes Figure 5 Schematic diagram of the BB cross-section structure.

[0037] Figure 8 yes Figure 6 Enlarged structural diagram at point I

[0038] Figure 9 yes Figure 1 A schematic diagram of the structure of the second main body;

[0039] Figure 10 yes Figure 9 Schematic diagram of the AA section structure.

[0040] Figure 11 This is a schematic diagram of the hydrostatic bearing in Embodiment 2 of the present invention;

[0041] Figure 12 yes Figure 11 Schematic diagram of the sectional structure of the middle AA section;

[0042] Figure 13 yes Figure 12 Enlarged structural diagram at point I;

[0043] Figure 14 yes Figure 11 A schematic diagram of the structure of the first main body in the middle;

[0044] Figure 15 yes Figure 14 A schematic diagram of the AA cross-sectional structure;

[0045] Figure 16 yes Figure 15 Enlarged structural diagram at point I;

[0046] Figure 17 yes Figure 11 A schematic diagram of the structure of the second main body;

[0047] Figure 18 is Figure 17 A-A cross-sectional structure schematic diagram of

[0048] Figure 19 is Figure 18 enlarged structure schematic diagram of I in

[0049] In the figure: 1, first body; 10, containing structure; 100, second groove structure; 11, potting groove; 12, mechanical assembly hole; 13, air inlet; 131, first hole structure; 132, second hole structure; 2, second body; 20, air cavity; 21, first surface; 22, second surface; 23, support structure; 231, end face; 3, connecting structure; 31, first connecting structure; 32, second connecting structure; 4, sealing structure; 40, glue pouring port. DETAILED DESCRIPTION

[0050] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0051] In the description of the present application, it should be understood that the terms "center", "lateral", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0052] In the description of the present application, it should be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] Embodiment one:

[0054] The embodiment provides a static pressure bearing, in particular to a radial static pressure bearing, Figure 1is a structural schematic diagram of the embodiment, Figure 2 is Figure 1 is a structural schematic diagram of the A-A section of Figure 1 and Figure 2 , which comprises a first body 1, a second body 2, and a connecting structure 3 arranged between the first body 1 and the second body 2. Among them, the first body 1 is a metal structure, the second body 2 is a graphite structure, and the first body 1 is arranged on one side of the second body 2.

[0055] Figure 3 is Figure 2 is an enlarged structural schematic diagram of I in Figure 3 , the connecting structure 3 comprises a first connecting structure 31 and a second connecting structure 32 arranged inside the first connecting structure 31, and a ventilation cavity 20 is arranged between the first connecting structure 31 and the second connecting structure 32. Figure 4 is Figure 2 is an enlarged structural schematic diagram of II in Figure 4 , a sealing structure 4 is arranged between the end of the second body 2 and the first body 1.

[0056] This static pressure bearing, by arranging a ventilation cavity 20 at the matching surface between the first body 1 and the second body 2, under the action of the ventilation cavity 20, the gas delivered by the external high-pressure gas source can be more evenly distributed on the circumference of the second body 2 made of graphite material, and then through the nature of the porous material of graphite, a gas floating effect is formed on the second surface 22 of the second body 2, and by arranging a sealing structure between the end of the second body 2 and the first body 1, the space between the inner and outer matching diameters of the first body 1 and the second body 2 is sealed, which forms an interlocking effect while being sealed, which is beneficial to improve the service life of the static pressure bearing, and is convenient to install and can be repeatedly replaced without damage.

[0057] As an optional implementation, Figure 5 is a structural schematic diagram of the first body in the embodiment, Figure 6 is Figure 5 is a structural schematic diagram of the A-A section of Figure 7 is Figure 5 is a structural schematic diagram of the B-B section in Figure 8 is Figure 6 is an enlarged structural schematic diagram of I in Figures 5-8 , as shown in the figure, a containing structure 10 is arranged on the first body 1, and the second body 2 is connected in the containing structure 10. The containing structure 10 in the embodiment is a groove structure opened along the surface of the first body 1.

[0058] Among them, Figure 9 is a structural schematic diagram of the second body in the embodiment, Figure 10 is Figure 9Fig. 2 is a schematic view of the cross-sectional structure of A-A in Fig. 1, Fig. 3 is a schematic view of the cross-sectional structure of B-B in Fig. 1, and Figure 9 and Figure 10 As shown in the figures, the ventilation cavity 20 is arranged on the first surface 21 of the second body 2, and a plurality of support structures 23 are arranged in the ventilation cavity 20, and the support structures 23 protrude from the ventilation cavity 20. The end surface 231 of the support structure 23 and the accommodation structure 10, and the first surface 21 and the accommodation structure 10 are respectively provided with a first connecting structure 31 and a second connecting structure 32.

[0059] Specifically, the ventilation cavity 20 is arranged circumferentially on the surface of the second body 2, and the support structure 23 adopts a columnar boss, and a plurality of columnar bosses are uniformly distributed along the circumference of the ventilation cavity 20.

[0060] Due to the porous nature of graphite itself, excessive design of the ventilation cavity 20 is prone to cause graphite to break, that is, graphite to break under the impact of internal high-pressure gas or under the action of external pressure, so the support structure 23 is arranged in the ventilation cavity 20, and in this embodiment, four columnar bosses uniformly distributed along the circumference of the ventilation cavity 20 are designed. The top surface of the columnar boss is tightly matched between the first connecting structure 31, that is, the adhesive and the first body 1, and plays a locking role while positioning and supporting.

[0061] In this embodiment, the first connecting structure 31 and the second connecting structure 32 are both adhesive layers, and the contact surface of the first body 1 and the second body 2 is bonded to prevent air leakage of the bearing and fix the second body 2. It should be noted that when the first body 1 and the second body 2 are bonded, the first connecting structure 31 and the second connecting structure 32, that is, the adhesive surface, cannot interfere with the ventilation cavity 20 to avoid the problem of blocking the ventilation cavity 20 by the adhesive.

[0062] As an optional implementation, the accommodation structure 10 further comprises a second groove structure 100 corresponding to the support structure 23 for accommodating the support structure 23, and the first connecting structure 31 is arranged between the top end surface of the support structure 23 and the bottom surface of the second groove structure 100. Limit the first connecting structure 31 to the contact plane of the support structure 23 and the second groove structure 100, which plays a locking role while connecting, thereby improving the service life of the bearing.

[0063] As an optional implementation, the sealing structure 4 is a glue filling layer, that is, the first body 1 and the second body 2 are sealed by glue filling.

[0064] Among them, the edge of the accommodation structure 10 and the end of the second body 2 form a glue filling port 40; the first body 1 is provided with a glue filling groove 11 communicated with the glue filling port 40, and the depth of the glue filling groove 11 is not less than the depth of the accommodation structure 10.

[0065] By setting the potting groove 11 on the first body 1, and the depth of the potting groove 11 is not less than the depth of the containing structure 10, after the static pressure bearing is glued and shaped, the static pressure bearing forms an interlocking structure, which can be sealed and interlocked at the same time, and is more beneficial to improve the service life of the bearing.

[0066] As an optional embodiment, the second surface 22 of the second body 2 protrudes from the first body 1.

[0067] In this embodiment, a mechanical fitting hole is provided on the first body 1, that is, a mechanical assembly hole 12 of the static pressure bearing. By high and low misalignment of the second body 2 and the first body 1, a misalignment surface is formed. In this embodiment, the second surface 22 of the second body 2 is set to be higher than the first body 1 by 1mm, so that the static pressure bearing cannot contact the first body 1 when working, and thus no external interference will be generated when the static pressure bearing and the mechanism are mechanically matched. Therefore, by setting the second surface 22 of the second body 2 to protrude from the first body 1, the high and low misalignment surface can reasonably and effectively solve the problem of mechanical matching on the second body 2, and also has the functions of convenient installation and non-damageable and repeatable replacement.

[0068] As an optional embodiment, the first body 1 is also provided with a gas source inlet 13 for introducing an external high-pressure gas source into the second body 2 through the gas source inlet 13 on the first body 1, and then forming a gas floating effect through the uniform distribution of the gas in the graphite layer.

[0069] The gas source inlet 13 is a through hole formed in the first body 1, and the gas source inlet 13 is in communication with the air cavity 20.

[0070] Specifically, the gas source inlet 13 includes a first hole structure 131 and a second hole structure 132 in communication. The first hole structure 131 is a threaded hole, and in this embodiment, an M3 threaded hole is used. The second hole structure 132 is a through hole, and in this embodiment, a through hole with a diameter of 2mm is used. The external gas source is connected to the threaded hole through a gas joint, so as to transport high-pressure gas into the first body 1, thereby realizing external access of high-pressure gas.

[0071] Embodiment two

[0072] Different from embodiment one, the embodiment provides an axial static pressure bearing, Figure 11 is a structural schematic diagram of the embodiment, Figure 12 is Figure 11 is a structural schematic diagram of the A-A section in the embodiment, Figure 13 is Figure 12 is an enlarged structural schematic diagram of the I place in the embodiment, as Figures 11-13As shown, it comprises a first body 1, a second body 2 and a connecting structure 3 arranged between the first body 1 and the second body 2, wherein the first body 1 is a metal structure, the second body 2 is a graphite structure, and the first body 1 is arranged inside the second body 2.

[0073] The connecting structure 3 comprises a first connecting structure 31 and a second connecting structure 32 arranged inside the first connecting structure 31, and a ventilation cavity 20 is arranged between the first connecting structure 31 and the second connecting structure 32. The sealing structure 4 is arranged between the two end portions of the second body 2 and the first body 1.

[0074] This static pressure bearing, by arranging the ventilation cavity 20 at the matching surface between the first body 1 and the second body 2, under the action of the ventilation cavity 20, the gas delivered by the external high-pressure gas source can be more evenly distributed on the circumference of the graphite second body 2, and then through the property of the porous material of the graphite itself, the air floating effect is formed on the second surface 22 of the second body 2, and by arranging the sealing structure between the end portion of the second body 2 and the first body 1, the space between the inner and outer matching diameters of the first body 1 and the second body 2 is sealed, which forms the interlocking effect while sealing, which is beneficial to improve the service life of the static pressure bearing.

[0075] As an optional embodiment, Figure 14 The structural schematic diagram of the first body in this embodiment is, Figure 15 is Figure 14 The A-A cross-sectional structural schematic diagram of, Figure 16 is Figures 14-16 The enlarged structural schematic diagram of I in, Figure 17 As shown, the accommodation structure 10 is arranged on the first body 1, and the second body 2 is connected in the accommodation structure 10. In this embodiment, the first body 1 adopts a ring structure, and the accommodation structure 10 is arranged inside the first body.

[0076] Figure 18 The structural schematic diagram of the second body in this embodiment is, Figure 17 is Figure 19 The A-A cross-sectional structural schematic diagram of, Figures 17-19 is ​ The enlarged structural schematic diagram of I in, ​ As shown, the ventilation cavity 20 is arranged on the first surface 21 of the second body 2, and a plurality of support structures 23 are arranged in the ventilation cavity 20; the first connecting structure 31 and the second connecting structure 32 are arranged between the end face 231 of the support structure 23 and the accommodation structure 10, and between the first surface 21 and the accommodation structure 10, respectively.

[0077] Specifically, the ventilation cavity 20 is arranged along the circumference of the second body 2, the support structure 23 adopts a ring-shaped boss, and a plurality of bosses are uniformly distributed along the radial direction of the ventilation cavity 20.

[0078] Due to the porous nature of graphite itself, the design of the vent cavity 20 is too large to easily cause the graphite to break, that is, the graphite is broken under the impact of high pressure gas inside or under the action of external pressure, so the support structure 23 is arranged in the vent cavity 20. In this embodiment, four annular bosses uniformly distributed along the radial direction of the vent cavity 20 are designed. The top surface of the boss is tightly matched with the first body 1 through the first connecting structure 31, that is, the adhesive, and plays a locking role while positioning and supporting.

[0079] In this embodiment, the first connecting structure 31 and the second connecting structure 32 are both adhesive layers, and the contact surface between the first body 1 and the second body 2 is bonded to prevent the bearing from leaking and fix the second body 2. It should be noted that when the first body 1 and the second body 2 are bonded, the first connecting structure 31 and the second connecting structure 32, that is, the adhesive surface, cannot interfere with the vent cavity 20 to avoid the problem of blocking the vent cavity 20 by the adhesive.

[0080] As an optional implementation, the sealing structure 4 is a glue filling layer, that is, the first body 1 and the second body 2 are sealed by glue filling.

[0081] Among them, the two ends of the accommodation structure 10 and the two ends of the second body 2 form a glue filling port 40 respectively; the first body 1 is provided with a glue filling groove 11 communicated with the glue filling port 40. The glue filling groove 11 is arranged on the first body 1, and the depth of the glue filling groove 11 is not less than the depth of the accommodation structure 10. After the glue filling and shaping of the static pressure bearing, the static pressure bearing forms an interlocking structure, which can seal and interlock at the same time, and is more conducive to improving the service life of the bearing.

[0082] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A hydrostatic bearing, characterized by The application relates to a connecting structure of a first body and a second body, comprising a first connecting structure and a second connecting structure arranged inside the first connecting structure, and a ventilation cavity arranged between the first connecting structure and the second connecting structure. A sealing structure is arranged between the end of the second body and the first body. A containing structure is arranged on the first body, and the second body is connected to the containing structure. The ventilation cavity is arranged on the first surface of the second body, and a plurality of support structures are arranged in the ventilation cavity; the second surface of the second body is protruded from the first body. The first connecting structure and the second connecting structure are respectively arranged between the end surface of the support structure and the containing structure and between the first surface and the containing structure. The sealing structure is a glue filling layer, wherein a glue filling opening is formed between the edge of the containing structure and the end of the second body; a glue filling groove is arranged on the first body and communicates with the glue filling opening, and the depth of the glue filling groove is not less than the depth of the containing structure. A second groove structure corresponding to the support structure is arranged in the containing structure and used for containing the support structure; the first connecting structure is arranged between the top end surface of the support structure and the bottom surface of the second groove structure.

2. A hydrostatic bearing according to claim 1, characterized in that: The ventilation cavity is circumferentially arranged on the surface of the second body, the support structure adopts a boss, and a plurality of bosses are uniformly distributed in the ventilation cavity.

3. A hydrostatic bearing according to claim 1 or 2, characterised in that: The first connecting structure and the second connecting structure are both glue layers.

4. A hydrostatic bearing according to claim 1 or 2, characterized in that: The first body is a metal structure, and the second body is a graphite structure.

5. A hydrostatic bearing according to any one of claims 1-2, characterized in that: An air source inlet is further arranged on the first body and communicates with the ventilation cavity.

6. A hydrostatic bearing according to any one of claims 1-2, characterized in that: The air source inlet is a through hole arranged on the first body. The air source inlet comprises a first hole structure and a second hole structure arranged in communication.

7. A hydrostatic bearing according to claim 6, wherein: The first hole structure is a threaded hole, and the second hole structure is a through hole. The first hole structure adopts an M3 threaded hole, and the second hole structure adopts a through hole with a diameter of 2 mm.

8. A hydrostatic bearing according to claim 7, characterized in that: ​

Images