High-pressure bearing structure

Abstract

The invention relates to the technical field of bearings, in particular to a high-pressure bearing structure which comprises a shell and a rotating shaft, and sealing assemblies are arranged between the two ends of the rotating shaft and the shell; the sealing assembly comprises a sealing end cover and a floating guide sleeve, the floating guide sleeve comprises a main body part, and a sealing convex edge is arranged on the main body part; a first dynamic sealing mechanism is arranged between the main body part and the rotating shaft, the first dynamic sealing mechanism comprises a movable sealing ring and a static sealing ring, the movable sealing ring is in sealing fit with the static sealing ring, a second dynamic sealing mechanism is arranged between the sealing convex edge and the sealing end cover, and the second dynamic sealing mechanism comprises a sealing groove and a plurality of flexible balls. The multiple flexible balls are arranged in the sealing groove in the circumferential direction at intervals. The high-pressure bearing structure provided by the invention can meet the sealing requirements under high-pressure environment, high-speed rotation of the rotating shaft and dynamic load, and is simple and compact in structure and easy to maintain.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and particularly to a high-pressure bearing structure. Background Art

[0002] High-pressure bearings are mainly used in equipment and systems that need to withstand high-pressure environments, such as deep-sea exploration, oil and gas extraction, aerospace, liquid and gas transportation, high-performance machinery, and nuclear energy equipment. Through special designs and materials, these bearings can provide stable and reliable operation under high pressure, high load, and extreme working conditions, ensuring precise movement and long-term normal operation of the equipment in complex environments.

[0003] In the extreme deep-sea environment, traditional high-pressure bearings face several challenges. First, during high pressure or high-speed rotation, axial and end-face leakage is likely to occur, resulting in leakage problems of liquids or gases. Second, it is difficult for the sealing components to adapt to the angular offset or vertical position change of the rotating shaft under dynamic loads, which may affect the sealing effect and lead to failures. In addition, the existing sealing structures lack stability and are prone to wear during long-term operation, ultimately resulting in sealing failure, thereby affecting the reliability and performance of the equipment. These problems pose high requirements for the long-term stable operation of deep-sea equipment. Summary of the Invention

[0004] The present invention provides a high-pressure bearing structure to solve the defects of existing high-pressure bearings, such as easy sealing leakage, difficulty in adapting to shaft offset caused by dynamic loads, and sealing failure due to wear in extreme deep-sea environments.

[0005] The present invention provides a high-pressure bearing structure, including: a housing and a rotating shaft. A high-pressure inner cavity is formed in the housing. The housing is provided with a water inlet and a water outlet, and both the water inlet and the water outlet are communicated with the high-pressure inner cavity. The rotating shaft passes through the housing, and sealing components are provided between both ends of the rotating shaft and the housing.

[0006] The sealing component includes a sealing end cover and a floating guide sleeve. The sealing end cover is connected to the housing. The floating guide sleeve includes a main body portion, and a sealing convex edge is provided on the main body portion.

[0007] A first dynamic sealing mechanism is provided between the main body portion and the rotating shaft. The first dynamic sealing mechanism includes a dynamic sealing ring and a static sealing ring. The dynamic sealing ring is sleeved on the rotating shaft, and the static sealing ring is provided on the main body portion. The dynamic sealing ring and the static sealing ring are in sealing cooperation. A second dynamic sealing mechanism is provided between the sealing convex edge and the sealing end cover. The second dynamic sealing mechanism includes a sealing groove and a plurality of flexible balls. The sealing groove is located between the sealing convex edge and the sealing end cover, and the plurality of flexible balls are arranged at intervals in the circumferential direction in the sealing groove.

[0008] According to the high-pressure bearing structure provided by the present invention, a groove is provided at the outer end of the main body portion, a part of the dynamic seal ring is located in the groove, and the static seal ring is provided on the bottom wall of the groove.

[0009] According to the high-pressure bearing structure provided by the present invention, a limiting ring is provided on the seal end cover, the limiting ring is located in the seal groove, and the limiting ring is used for radially limiting the flexible balls.

[0010] According to the high-pressure bearing structure provided by the present invention, it further includes a bushing, the bushing is sleeved on the rotating shaft, a limiting groove is provided on the bushing along the circumferential direction, and the dynamic seal ring is provided in the limiting groove.

[0011] According to the high-pressure bearing structure provided by the present invention, the dynamic seal ring is made of cemented carbide material, and the static seal ring is made of high-pressure-resistant composite flexible material; and / or, the elastic modulus of the flexible balls is 5 Mpa to 15 Mpa.

[0012] According to the high-pressure bearing structure provided by the present invention, the rotating shaft penetrates through the main body portion, a first gap is provided axially between the end face of the seal convex edge and the end cover, a second gap is provided radially between the outer circumference of the seal convex edge and the end cover, and a floating compensation mechanism is provided between the main body portion and the end cover, and the floating compensation mechanism is used for compensating the radial floating and axial floating of the floating guide sleeve.

[0013] According to the high-pressure bearing structure provided by the present invention, the floating compensation mechanism includes an annular fixed seat, a first flexible compensation ring and a second flexible compensation ring. The annular fixed seat is provided on the main body portion along the circumferential direction. First annular inclined surfaces and second annular inclined surfaces are symmetrically provided on both sides of the annular fixed seat along the axial direction. The diameters of the first annular inclined surface and the second annular inclined surface gradually decrease in the direction from the inside to the outside. The first flexible compensation ring is sleeved on the first annular inclined surface, the second flexible compensation ring is sleeved on the second annular inclined surface, and the first flexible compensation ring and the second flexible compensation ring both abut against the end cover.

[0014] According to the high-pressure bearing structure provided by the present invention, the floating compensation mechanism further includes an annular abutting groove, the annular abutting groove is provided on the side of the end cover facing the main body portion along the circumferential direction, and first annular abutting surfaces and second annular abutting surfaces are symmetrically provided on both sides of the annular abutting groove along the axial direction. The diameters of the first annular abutting surface and the second annular abutting surface gradually increase in the direction from the inside to the outside. The first flexible compensation ring abuts against the first annular abutting surface, and the second flexible compensation ring abuts against the second annular abutting surface.

[0015] According to the high-pressure bearing structure provided by the present invention, the thicknesses of the first flexible compensation ring and the second flexible compensation ring gradually increase from the inside to the outside.

[0016] The high-pressure bearing structure provided by the present invention further includes a bearing housing, a bushing, and a water-lubricated bearing shoe. The bearing housing is disposed inside the housing. The bushing is sleeved on the water-lubricated bearing shoe, and the bushing is embedded in the bearing housing. The rotating shaft passes through the water-lubricated bearing shoe to form a water film between the rotating shaft and the water-lubricated bearing shoe after water is supplied in the high-pressure inner cavity.

[0017] In the high-pressure bearing structure provided by the present invention, by providing sealing assemblies at both ends of the rotating shaft, when the rotating shaft works, the first dynamic sealing mechanism provided between the main body part and the rotating shaft can achieve dynamic sealing through the sealing cooperation between the dynamic sealing ring and the static sealing ring. At the same time, the second dynamic sealing mechanism provided between the sealing convex edge and the sealing end cover can achieve dynamic sealing through a plurality of flexible balls arranged at intervals along the circumferential direction in the sealing groove, so that the high-pressure bearing structure can meet the sealing requirements under high-pressure environment, high-speed rotation of the rotating shaft and dynamic load conditions, and has a simple and compact structure and is easy to maintain.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 is a schematic diagram of the high-pressure bearing structure provided by the embodiment of the present invention.

[0021] Figure 2 is Figure 1 a partial enlarged schematic diagram of A in

[0022] Figure 3 is Figure 2 a partial enlarged schematic diagram of B in

[0023] Figure 4 is Figure 2 a partial enlarged schematic diagram of C in

[0024] Figure 5 is Figure 2 a partial enlarged schematic diagram of D in

[0025] Reference numerals: 100, housing; 110, high-pressure inner cavity; 120, water inlet; 130, water outlet; 200, rotating shaft; 300, sealing assembly; 310, sealing end cover; 320, floating guide sleeve; 321, main body; 322, sealing flange; 330, first dynamic sealing mechanism; 331, dynamic sealing ring; 332, static sealing ring; 340, second dynamic sealing mechanism; 341, sealing groove; 342, flexible ball; 343, limiting ring; 350, first gap; 360, second gap; 400, bushing; 500, floating compensation mechanism; 510, annular fixed seat; 511, first annular inclined surface; 512, second annular inclined surface; 520, first flexible compensation ring; 530, second flexible compensation ring; 540, annular abutting groove; 541, first annular abutting surface; 542, second annular abutting surface; 600, bearing seat; 700, bushing; 800, water-lubricated bearing bush. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present invention belong to the scope of protection of the present invention.

[0027] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0029] In the embodiments of the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0030] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0031] The following is combined with Figures 1 to 5 to describe the high-pressure bearing structure provided by the present invention.

[0032] Refer to Figures 1 to 5 As shown, the high-pressure bearing structure provided by the embodiments of the present invention includes: a housing 100 and a rotating shaft 200. A high-pressure inner cavity 110 is formed in the housing 100. An inlet 120 and an outlet 130 are provided on the housing 100. Both the inlet 120 and the outlet 130 are communicated with the high-pressure inner cavity 110. The rotating shaft 200 passes through the housing 100, and sealing assemblies 300 are provided between both ends of the rotating shaft 200 and the housing 100.

[0033] The sealing assembly 300 includes a sealing end cover 310 and a floating guide sleeve 320. The sealing end cover 310 is connected to the housing 100. The floating guide sleeve 320 includes a main body portion 321. A sealing flange 322 is provided on the main body portion 321. The rotating shaft 200 passes through the main body portion 321.

[0034] A first dynamic sealing mechanism 330 is provided between the main body portion 321 and the rotating shaft 200. The first dynamic sealing mechanism 330 includes a dynamic sealing ring 331 and a static sealing ring 332. The dynamic sealing ring 331 is sleeved on the rotating shaft 200, and the static sealing ring 332 is provided on the main body portion 321. The dynamic sealing ring 331 and the static sealing ring 332 are in sealing cooperation. A second dynamic sealing mechanism 340 is provided between the sealing convex edge 322 and the sealing end cover 310. The second dynamic sealing mechanism 340 includes a sealing groove 341 and a plurality of flexible balls 342. The sealing groove 341 is located between the sealing convex edge 322 and the sealing end cover 310, and the plurality of flexible balls 342 are arranged at intervals in the circumferential direction in the sealing groove 341.

[0035] For the high-pressure bearing structure provided by the present invention, by arranging the sealing assembly 300 at both ends of the rotating shaft 200, when the rotating shaft 200 works, the first dynamic sealing mechanism 330 provided between the main body portion 321 and the rotating shaft 200 can achieve dynamic sealing through the sealing cooperation between the dynamic sealing ring 331 and the static sealing ring 332. At the same time, the second dynamic sealing mechanism 340 provided between the sealing convex edge 322 and the sealing end cover 310 can achieve dynamic sealing through the plurality of flexible balls 342 arranged at intervals in the circumferential direction in the sealing groove 341, so that the high-pressure bearing structure can meet the sealing requirements under high-pressure environment, high-speed rotation of the rotating shaft 200 and dynamic load conditions, and has a simple and compact structure and is easy to maintain.

[0036] Specifically, when the rotating shaft 200 works, the dynamic sealing ring 331 can rotate synchronously with it, while the static sealing ring 332 does not rotate. The dynamic sealing ring 331 and the static sealing ring 332 always maintain sealing cooperation, and can seal the gap between the floating guide sleeve 320 (main body portion 321) and the rotating shaft 200. Moreover, this mechanism is an adaptive structure design and can compensate for the minute deformation caused by temperature change or mechanical vibration. At the same time, the flexible balls 342 can roll radially along with the angular offset or vertical displacement of the rotating shaft 200 caused by loading, and can also compensate for axial deformation, dynamically fit the end faces of the sealing end cover 310 and the sealing convex edge 322, and offset the displacement difference through elastic deformation to seal the gap between the floating guide sleeve 320 (sealing convex edge 322) and the sealing end cover 310.

[0037] The sealing assembly 300 includes a sealing end cover 310 and a floating guide sleeve 320. The sealing end cover 310 is connected to the housing 100, and the connection position is sealed by a sealing ring. The floating guide sleeve 320 is used to provide stable guidance for the rotating shaft 200 to reduce the negative impact on the sealing of the high-pressure inner cavity 110 caused by the offset of the rotating shaft 200.

[0038] Preferably, the floating guide sleeve 320 can be made of silicon carbide or ceramic-based composite materials, which have excellent high-pressure resistance and wear resistance, can maintain a long service life in extreme working environments, reduce wear and delay maintenance frequency, and are suitable for applications under high load and high pressure conditions. The dynamic seal ring 331 can be made of cemented carbide material (such as 13Cr), which has excellent wear resistance, corrosion resistance, compressive strength and high-temperature stability, can effectively extend the service life of the seal ring, reduce friction and wear, and improve the sealing performance, and is particularly suitable for applications in high pressure, high temperature and harsh environments. The static seal ring 332 can be made of high-pressure resistant composite flexible material (such as aramid fiber reinforced polymer composite material), which has excellent high-pressure resistance, high-temperature resistance, chemical corrosion resistance, good elasticity and sealing performance, can maintain a stable sealing effect under high pressure environment, adapt to various temperature changes and corrosive media, ensure the sealing and long-term reliability of the equipment, reduce leakage risks and extend service life. The flexible ball 342 can be made of flexible non-metallic materials such as highly elastic rubber or polyurethane materials, which have excellent impact resistance, wear resistance, aging resistance and strong recovery force, so that it can maintain good performance under dynamic and static loads. The elastic modulus of the flexible ball 342 is 5Mpa to 15Mpa, which can not only roll but also compensate for axial deformation, and is suitable for sealing or supporting structures that bear higher loads. At the same time, it can adapt to larger deformations and provide efficient buffering and sealing effects.

[0039] See also Figures 1 to 3 As shown, according to some embodiments of the present invention, a groove is provided at the outer end of the main body 321, a portion of the dynamic sealing ring 331 is located in the groove, and the static sealing ring 332 is provided on the bottom wall of the groove.

[0040] By providing a groove at the outer end of the main body 321, it is possible to provide installation space for the dynamic seal ring 331 and the static seal ring 332, and reduce the space occupied by the dynamic seal ring 331 and the static seal ring 332, while satisfying the sealing cooperation of the dynamic seal ring 331 and the static seal ring 332, and facilitate assembly. At the same time, the static seal ring 332 is arranged on the bottom wall of the groove, and is made of a high-pressure resistant composite flexible material, which can compensate for the axial movement of the floating guide sleeve 320.

[0041] See also Figure 1 , Figure 2 and Figure 4 As shown, according to some embodiments of the present invention, a limiting ring 343 is provided on the sealing end cover 310 . The limiting ring 343 is located in the sealing groove 341 . The limiting ring 343 is used to radially limit the flexible ball 342 .

[0042] By arranging a limiting ring 343 on the sealing end cover 310 , the flexible ball 342 can be radially limited to prevent it from escaping from the sealing groove 341 , thereby ensuring the stability of the flexible ball 342 during operation.

[0043] Specifically, the limit ring 343 includes a connecting portion and a limiting portion that are vertically connected, and its cross-section is L-shaped. The connecting portion is connected to the sealing end cover 310, and the limiting portion is located radially outside the flexible ball 342 to perform radial limiting on it.

[0044] See Figures 1 to 3 As shown, according to some embodiments of the present invention, the high-pressure bearing structure further includes a bushing 400. The bushing 400 is sleeved on the rotating shaft 200, and a limiting groove is provided on the bushing 400 along the circumferential direction. The dynamic sealing ring 331 is arranged in the limiting groove.

[0045] By providing the bushing 400, the load of the rotating shaft 200 can be effectively shared, wear can be reduced, and better compressive resistance can be provided. The limiting groove provided on the bushing 400 along the circumferential direction can limit and fix the dynamic sealing ring 331 to ensure the stability of the dynamic sealing ring 331 when the rotating shaft 200 is working.

[0046] See Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, a first gap 350 is provided axially between the end face of the sealing convex edge 322 and the end cover, a second gap 360 is provided radially between the outer periphery of the sealing convex edge 322 and the end cover, and a floating compensation mechanism 500 is provided between the main body portion 321 and the end cover. The floating compensation mechanism 500 is used to compensate for the radial and axial floating of the floating guide sleeve 320.

[0047] By providing a first gap 350 axially between the end face of the sealing convex edge 322 and the end cover and a second gap 360 radially between the outer periphery of the sealing convex edge 322 and the end cover, the axial and radial floating of the rotating shaft 200 during operation under high pressure, high-speed rotation, and dynamic load conditions can be effectively compensated. At the same time, a floating compensation mechanism 500 is provided between the main body portion 321 and the end cover. This mechanism can compensate for the radial and axial floating of the floating guide sleeve 320. When the high-pressure bearing structure undergoes minor axial or radial changes during operation, the floating compensation mechanism 500 can automatically adjust its position to ensure that the first dynamic sealing mechanism 330 and the second dynamic sealing mechanism 340 are always in a stable sealing state, thereby improving the reliability of the seal.

[0048] See Figure 1 、 Figure 2 and Figure 5As shown, according to some embodiments of the present invention, the floating compensation mechanism 500 includes an annular fixed seat 510, a first flexible compensation ring 520, and a second flexible compensation ring 530. The annular fixed seat 510 is circumferentially arranged on the main body portion 321. On both sides of the annular fixed seat 510 along the axial direction, a first annular inclined surface 511 and a second annular inclined surface 512 are symmetrically provided. The diameters of the first annular inclined surface 511 and the second annular inclined surface 512 gradually decrease in the direction from the inside to the outside. The first flexible compensation ring 520 is sleeved on the first annular inclined surface 511, and the second flexible compensation ring 530 is sleeved on the second annular inclined surface 512. Both the first flexible compensation ring 520 and the second flexible compensation ring 530 are in contact with the end cover.

[0049] By configuring the floating compensation mechanism 500 in the above form, the flexible characteristics of the first flexible compensation ring 520 and the second flexible compensation ring 530 can be utilized, in conjunction with the first annular inclined surface 511 and the second annular inclined surface 512 on the annular fixed seat 510, to effectively compensate for the radial and axial floating of the floating guide sleeve 320 in the high-pressure bearing structure.

[0050] Specifically, due to the design of the gradually decreasing first annular inclined surface 511 and second annular inclined surface 512, the first flexible compensation ring 520 and the second flexible compensation ring 530 can be oriented towards the sealing end cover 310 in both the inward and outward directions. When the floating guide sleeve 320 undergoes radial and axial floating towards the outside of the housing 100, the first flexible compensation ring 520 sleeved on the first annular inclined surface 511 can effectively compensate for the radial and axial floating of the floating guide sleeve 320. Similarly, when the floating guide sleeve 320 undergoes radial and axial floating towards the inside of the housing 100, the first flexible compensation ring 520 sleeved on the first annular inclined surface 511 can effectively compensate for the radial and axial floating of the floating guide sleeve 320.

[0051] The first flexible compensation ring 520 and the second flexible compensation ring 530 can be made of a modified rubber material, which has high elasticity and a long service life. Among them, high elasticity specifically means that the first flexible compensation ring 520 and the second flexible compensation ring 530 have the ability to quickly return to their original state after the external force is removed.

[0052] It should be noted that the above-mentioned "direction from the inside to the outside" refers to Figure 5 the direction indicated by the arrow in

[0053] See Figure 1 、 Figure 2 and Figure 5As shown, according to some embodiments of the present invention, the floating compensation mechanism 500 further includes an annular abutting groove 540 which is provided on the side of the end cover facing the main body portion 321 along the circumferential direction. First annular abutting surfaces 541 and second annular abutting surfaces 542 are symmetrically provided on both sides of the annular abutting groove 540 along the axial direction. The diameters of the first annular abutting surfaces 541 and the second annular abutting surfaces 542 gradually increase in the direction from the inside to the outside. The first flexible compensation ring 520 abuts against the first annular abutting surface 541, and the second flexible compensation ring 530 abuts against the second annular abutting surface 542.

[0054] By adding the annular abutting groove 540 on the sealing end cover 310, the first annular abutting surface 541 and the second annular abutting surface 542 can be respectively and stably abutted and cooperated with the first flexible compensation ring 520 and the second flexible compensation ring 530. With the design that the diameters of the first annular abutting surface 541 and the second annular abutting surface 542 gradually increase from the inside to the outside, it can ensure that the floating guide sleeve 320 can better adapt to the floating changes during the working process, maintain a better contact pressure, and at the same time improve the response speed and accuracy of the compensation for the floating guide sleeve 320, ensuring that the floating guide sleeve 320 can be adjusted quickly and accurately during the floating compensation process to cope with the floating caused by external factors such as temperature, pressure and dynamic load of the rotating shaft 200.

[0055] See Figure 1 、 Figure 2 and Figure 5 As shown, according to some embodiments of the present invention, the thicknesses of the first flexible compensation ring 520 and the second flexible compensation ring 530 gradually increase in the direction from the inside to the outside.

[0056] By setting the thicknesses of the first flexible compensation ring 520 and the second flexible compensation ring 530 to gradually increase in the direction from the inside to the outside, the dynamic compensation performance of the first flexible compensation ring 520 and the second flexible compensation ring 530 for the floating guide sleeve 320 can be optimized.

[0057] Specifically, since the thicknesses of the first flexible compensation ring 520 and the second flexible compensation ring 530 gradually increase in the direction from the inside to the outside, with the gradual increase of the thickness, the outer part of the flexible compensation ring has greater deformation ability and elasticity, and can provide a greater compensation amount on the outside, so as to effectively cope with greater displacement or floating. At the same time, this structure can significantly improve the stability of the floating guide sleeve 320 when floating.

[0058] It should be noted that the above-mentioned "direction from the inside to the outside" refers to the direction of the arrow shown in Figure 5 the figure.

[0059] See Figure 1As shown, according to some embodiments of the present invention, the high-pressure bearing structure further includes a bearing housing 600, a bushing 700, and a water-lubricated bearing shoe 800. The bearing housing 600 is disposed within the housing 100. The bushing 700 is sleeved on the water-lubricated bearing shoe 800, and the bushing 700 is embedded within the bearing housing 600. The rotating shaft 200 passes through the water-lubricated bearing shoe 800 to form a water film between the rotating shaft 200 and the water-lubricated bearing shoe 800 after water is supplied in the high-pressure inner cavity 110.

[0060] By providing the bearing housing 600, the bushing 700, and the water-lubricated bearing shoe 800, the high-pressure bearing structure can effectively achieve bearing lubrication and stable operation under high-pressure environments.

[0061] Specifically, the bearing housing 600 is fixed within the housing 100 to provide stable support and positioning functions. The bushing 700 is sleeved within the water-lubricated bearing shoe 800, which can reduce the direct friction between the rotating shaft 200 and the water-lubricated bearing shoe 800, thereby extending the service life of the bearing. The water-lubricated bearing shoe 800, on the other hand, plays a lubricating role by forming a water film with the rotating shaft 200, reducing friction and heat accumulation.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-pressure bearing structure, characterized in that: include: A housing and a rotating shaft, wherein a high-pressure inner cavity is formed in the housing, a water inlet and a water outlet are provided on the housing, both of which are communicated with the high-pressure inner cavity, the rotating shaft passes through the housing, and sealing components are provided between both ends of the rotating shaft and the housing; The sealing assembly comprises a sealing end cover and a floating guide sleeve, wherein the sealing end cover is connected to the housing, and the floating guide sleeve comprises a main body, wherein a sealing convex edge is provided on the main body, and the rotating shaft passes through the main body; A first dynamic sealing mechanism is provided between the main body and the rotating shaft, the first dynamic sealing mechanism includes a dynamic sealing ring and a static sealing ring, the dynamic sealing ring is sleeved on the rotating shaft, the static sealing ring is provided on the main body, the dynamic sealing ring and the static sealing ring are sealingly matched, a second dynamic sealing mechanism is provided between the sealing ridge and the sealing end cover, the second dynamic sealing mechanism includes a sealing groove and a plurality of flexible balls, the sealing groove is located between the sealing ridge and the sealing end cover, and the plurality of flexible balls are circumferentially spaced in the sealing groove.

2. The high-pressure bearing structure according to claim 1, characterized in that: The outer end of the main body is provided with a groove, part of the dynamic sealing ring is located in the groove, and the static sealing ring is arranged on the bottom wall of the groove.

3. The high-pressure bearing structure according to claim 1, characterized in that: The sealing end cover is provided with a limiting ring, the limiting ring is located in the sealing groove, and the limiting ring is used to radially limit the flexible ball.

4. The high-pressure bearing structure according to claim 1, characterized in that: It also includes a shaft sleeve, which is sleeved on the rotating shaft. A limiting groove is circumferentially provided on the shaft sleeve, and the dynamic sealing ring is arranged in the limiting groove.

5. The high-pressure bearing structure according to claim 1, characterized in that: The dynamic sealing ring is made of hard alloy material, and the static sealing ring is made of high-pressure resistant composite flexible material; And / or, the elastic modulus of the flexible ball is 5 MPa to 15 MPa.

6. The high-pressure bearing structure according to any one of claims 1 to 5, characterized in that: A first gap is axially provided between the end surface of the sealing flange and the end cover, a second gap is radially provided between the outer periphery of the sealing flange and the end cover, and a floating compensation mechanism is provided between the main body and the end cover, and the floating compensation mechanism is used to compensate for radial floating and axial floating of the floating guide sleeve.

7. The high-pressure bearing structure according to claim 6, characterized in that: The floating compensation mechanism includes an annular fixing seat, a first flexible compensation ring and a second flexible compensation ring. The annular fixing seat is circumferentially arranged on the main body, and the annular fixing seat is symmetrically provided with a first annular slope and a second annular slope on both sides of the axial direction. The diameters of the first annular slope and the second annular slope gradually decrease from the inside to the outside. The first flexible compensation ring is sleeved on the first annular slope, and the second flexible compensation ring is sleeved on the second annular slope. The first flexible compensation ring and the second flexible compensation ring are both abutted against the end cover.

8. The high-pressure bearing structure according to claim 7, characterized in that: The floating compensation mechanism also includes an annular abutment groove, which is circumferentially arranged on the side of the end cover facing the main body, and the annular abutment groove is symmetrically provided with a first annular abutment surface and a second annular abutment surface on both sides along the axial direction. The diameters of the first annular abutment surface and the second annular abutment surface gradually increase from the inside to the outside, and the first flexible compensation ring abuts against the first annular abutment surface, and the second flexible compensation ring abuts against the second annular abutment surface.

9. The high-pressure bearing structure according to claim 8, characterized in that: The thickness of the first flexible compensation ring and the second flexible compensation ring gradually increases from the inside to the outside.

10. The high-pressure bearing structure according to any one of claims 1 to 5, characterized in that: It also includes a bearing seat, a bushing and a water-lubricated bearing bushing, wherein the bearing seat is arranged in the housing, the bushing is sleeved on the water-lubricated bearing bushing, the bushing is embedded in the bearing seat, and the rotating shaft passes through the water-lubricated bearing bushing, so that a water film is formed between the rotating shaft and the water-lubricated bearing bushing after water is supplied to the high-pressure inner cavity.

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