Multistage pump sliding bearing end cover structure with holes

Abstract

The present invention discloses a multi-stage pump sliding bearing perforated end cover structure, specifically relating to the technical field of sliding bearing structures, including a limit sleeve sleeved on the outside of a shaft, a support assembly provided on the limit sleeve, the support assembly including a washer provided in the limit sleeve, and a plurality of adjustment rods hinged on the washer. The present invention can dynamically compensate for shaft size deviations through the elastic deformation ability of the elastic resistance member, without the need to pre-customize bearing specifications, significantly improving the adaptability to shafts and bearings of different diameters, the design of the pressure ball embedded in the elastic resistance member, combined with the sliding connection fitting on the arc block, can automatically adjust the resistance angle when contacting the shaft, eliminate radial deviation during installation, achieve automatic centering without additional adjustment, simplify the installation process and improve the stability of the shaft system, and the threaded connection design of the extension ring and the sealing disk allows for quick adjustment of the clamping force or replacement of the lubrication component without disassembling the overall structure, thereby reducing maintenance costs while improving convenience during operation.

Description

Technical Field

[0001] The present invention relates to the technical field of sliding bearing structures, and more particularly to a perforated end cover structure of a sliding bearing of a multi-stage pump. Background Art

[0002] Sliding bearing structures are widely used in multi-stage pumps, especially in pumps with large operating loads such as sub-high pressure and high pressure boiler feed pumps, multi-stage centrifugal oil pumps, etc. As part of the bearing seat, they provide precise installation position for sliding bearings (bearings) to ensure the stability of the rotor axis.

[0003] Among them, patent publication number CN213332091U discloses a sliding bearing mounting structure, comprising a frame, a bearing shell, a cover plate, a rotating shaft, and a sliding bearing. The frame is provided with a mounting hole and an oil drain hole connected to the mounting hole; the bearing shell is mounted in the mounting hole, and the surface of the bearing shell abuts against the side wall of the mounting hole; the cover plate is detachably connected to the frame and blocks one end of the mounting hole.

[0004] During use, this structure rotates the shaft and bearing, while the sliding bearing is coaxially and removably connected to the end of the shaft, which is positioned within the mounting hole. The sliding bearing abuts the frame axially and the cover plate radially. However, the bearing is fixed within the frame mounting hole, with the axial direction blocked only by the cover plate, making it impossible to dynamically adjust the clamping force according to actual operating conditions. If there are tolerances on the shaft dimensions or if different bearing specifications are required, the end cap assembly must be customized, making the installation process cumbersome and costly. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a multi-stage pump sliding bearing end cover structure with holes, aiming to solve the problems raised in the above-mentioned background technology.

[0006] The present invention provides the following technical solution: a multi-stage pump sliding bearing perforated end cover structure, comprising a limiting sleeve sleeved on the outside of a shaft, wherein a support assembly is provided on the limiting sleeve;

[0007] The support assembly includes a washer arranged in a limiting sleeve, and a plurality of adjustment rods are hinged on the washer, and an elastic resistance member is fixedly provided at one end of each adjustment rod, and a pressure ball is embedded in one side of each of the plurality of elastic resistance members;

[0008] A center ring is provided on the top of the washer, and a plurality of traction rods are provided on the top of the center ring. An arc block is fixedly provided on one side of the adjustment rod, and a fitting is slidably connected to the arc block.

[0009] An oil reservoir is provided at the bottom of the center ring, a guide cavity is provided on the oil reservoir, and a plurality of limiting holes are distributed on the inner wall of the oil reservoir, each of which is connected to the guide cavity, and a lubricating ball is rotatably connected in each limiting hole;

[0010] A wire drum is fixedly provided at the bottom of the diversion cavity, an extension ring is fixedly provided on the side of the gasket away from the adjusting rod, an end of the extension ring away from the gasket is rotatably connected to the blocking disk, an inner wire ring is fixedly provided at the middle of the blocking disk, a sealing ring is provided on the outside of the inner wire ring, the sealing ring extends to one end of the extension ring and is rotatably connected to the extension ring, the inner wire ring is sleeved on the outside of the wire drum and is threadedly connected to the wire drum;

[0011] A plurality of hinge blocks are fixedly provided on one side of the center ring away from the oil storage seat, and each hinge block is respectively located at the bottom end of the corresponding traction rod, the top of the traction rod extends to the arc block and is rotatably connected to the arc block, the traction rod is covered with the top end of the hinge block and is rotatably connected to the hinge block, and a staggered arc groove is provided on one side of each hinge block, one end of the limit sleeve is threadedly connected to a docking sleeve, one end of the docking sleeve is fixedly provided with a constraint cylinder, and the constraint cylinder is sleeved on the outside of the shaft rod;

[0012] The technical effects and advantages of the present invention are as follows:

[0013] 1. The linkage design of the adjustment rod and the elastic resistance member in the support assembly of the present invention can drive the axial displacement of the wire drum by rotating the sealing disk, driving the synchronous movement of the center ring and the traction rod, realizing adaptive clamping of the shaft by multiple adjustment rods, and facilitating dynamic adjustment of the clamping force according to actual working conditions. The elastic deformation capacity of the elastic resistance member can dynamically compensate for shaft dimensional deviations, eliminating the need for pre-customized bearing specifications, significantly improving the adaptability of shafts and bearings of different diameters, and eliminating the need for end cap components when shaft dimensional tolerances exist, thereby reducing costs and improving adaptability.

[0014] 2. The design of the pressure ball embedded in the elastic resistance member of the present invention, combined with the sliding connection fitting on the arc block, can automatically adjust the resistance angle when contacting the shaft, eliminating radial deviation during installation, achieving automatic centering without additional adjustment, simplifying the installation process and improving the stability of the shaft system;

[0015] 3. This invention stores lubricating oil in the oil reservoir's diversion chamber. The lubricating ball in the retaining hole directly contacts the shaft, achieving rolling friction lubrication and reducing the energy consumption and wear associated with traditional sliding friction. The sealing structure between the restraining cylinder and the docking sleeve, combined with the sealing ring, effectively prevents oil from being ejected as the shaft rotates, improving the sealing performance of the lubrication system.

[0016] 4. The threaded connection design between the extension ring and the sealing disk allows for quick adjustment of the clamping force or replacement of the lubrication assembly without disassembling the entire structure, reducing maintenance costs. The offset arc groove design of the articulated block provides a rotation guide for the traction rod, ensuring synchronous movement of all components during adjustment and preventing jamming.

[0017] To summarize, the elastic deformation ability of the elastic resistance part can dynamically compensate for the shaft size deviation, without the need to pre-customize the bearing specifications, significantly improving the adaptability to shafts and bearings of different diameters. The design of the pressure ball embedded in the elastic resistance part, combined with the sliding connection fitting on the arc block, can automatically adjust the resistance angle when contacting the shaft, eliminating radial deviation during installation, achieving automatic centering without additional adjustment, simplifying the installation process and improving the stability of the shaft system. The threaded connection design of the extension ring and the sealing disk allows for quick adjustment of the clamping force or replacement of the lubrication component without disassembling the overall structure, reducing maintenance costs while improving convenience during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, and the like involved in the embodiments of the present disclosure.

[0019] Figure 1 It is the main view of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the support assembly of the present invention installed in the limiting sleeve.

[0021] Figure 3 Schematic diagram of the support assembly of the present invention.

[0022] Figure 4 It is a schematic diagram of the adjustment rod, elastic resistance member, pressure ball, center ring, oil storage seat and extension ring of the present invention installed together.

[0023] Figure 5 It is a schematic diagram of the washer, the adjusting rod, the elastic resisting member and the resisting ball of the present invention.

[0024] Figure 6 This is a schematic diagram of the installation of the extension ring, wire drum, traction rod, center ring and hinge block of the present invention.

[0025] Figure 7 It is a schematic diagram of the sealing disk, extension ring, wire drum, oil storage seat and inner wire ring of the present invention.

[0026] Figure 8 Schematic diagram of the center ring, traction rod, fitting and hinge block of the present invention.

[0027] The accompanying drawings are marked as follows: 1. shaft; 2. limiting sleeve; 3. gasket; 4. adjusting rod; 5. elastic resistance member; 6. pressure ball; 7. center ring; 8. traction rod; 9. arc block; 10. fitting member; 11. oil storage seat; 12. guide chamber; 13. limiting hole; 14. lubricating ball; 15. wire drum; 16. extension ring; 17. sealing disk; 18. inner wire ring; 19. sealing ring; 20. hinge block; 21. offset arc groove; 22. docking sleeve; 23. constraint cylinder. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] As attached Figures 1-8 The multi-stage pump sliding bearing shown has a perforated end cap structure, and the design of the pressure ball 6 embedded in the elastic resistance member 5, combined with the sliding connection fitting 10 on the arc block 9, can automatically adjust the resistance angle when contacting the shaft 1, eliminating radial deviation during installation, achieving automatic centering without additional adjustment, simplifying the installation process and improving the stability of the shaft system. The threaded connection design of the extension ring 16 and the sealing disk 17 allows for rapid adjustment of the clamping force or replacement of the lubrication component without disassembling the overall structure, reducing maintenance costs while improving convenience during operation. The specific structural configuration of the component is as follows;

[0030] The support assembly includes a washer 3 disposed in a limiting sleeve 2, and a plurality of adjustment rods 4 are hingedly connected to the washer 3. An elastic resistance member 5 is fixedly disposed at one end of each adjustment rod 4. A pressure ball 6 is embedded in one side of each of the elastic resistance members 5. The elastic resistance members 5 are subjected to force deformation when they contact the shaft 1, and their own elasticity drives the pressure ball 6 to pressurize the shaft 1.

[0031] A center ring 7 is provided on the top of the washer 3, and a plurality of traction rods 8 are provided on the top of the center ring 7. An arc block 9 is fixedly provided on one side of the adjustment rod 4. A fitting piece 10 is slidably connected to the arc block 9. The fitting piece 10 slides on the arc block 9 under force to automatically adjust the angle of the fitting piece 10;

[0032] An oil reservoir 11 is provided at the bottom of the center ring 7, and a guide cavity 12 is provided on the oil reservoir 11. The inner wall of the oil reservoir 11 is provided with a plurality of limiting holes 13 which are all connected to the guide cavity 12, so that the lubricating oil can be stored on the oil reservoir 11 through the guide cavity 12 and can be discharged through the limiting holes 13. A lubricating ball 14 is rotatably connected in each limiting hole 13. A wire drum 15 is fixedly provided at the bottom of the guide cavity 12, and an extension ring 16 is fixedly provided on the side of the washer 3 away from the adjusting rod 4. The extension ring 16 is away from the washer 3. One end of the closure ring 16 is rotatably connected to a blocking disk 17, and an inner wire ring 18 is fixedly provided in the middle of the blocking disk 17. The rotation of the inner wire ring 18 causes the wire drum 15 to axially displace along the extension ring 16 in the middle of the extension ring 16. A sealing ring 19 is provided on the outside of the inner wire ring 18. The sealing ring 19 extends to one end of the extension ring 16 and is rotatably connected to the extension ring 16. The inner wire ring 18 is sleeved on the outside of the wire drum 15 and is threadedly connected to the wire drum 15. The sealing ring 19 extends to one end of the extension ring 16 to seal the extension ring 16 to prevent oil leakage.

[0033] A plurality of hinge blocks 20 are fixedly provided on the side of the center ring 7 away from the oil storage seat 11, and each hinge block 20 is respectively located at the bottom end of the corresponding traction rod 8. The top of the traction rod 8 extends to the arc block 9 and is rotatably connected to the arc block 9. The traction rod 8 covers the top end of the hinge block 20 and is rotatably connected to the hinge block 20. When the hinge block 20 is displaced, it drives the traction rod 8 to displace, and then enables the adjusting rod 4 to rotate along the axis point of the connection between the adjusting rod 4 and the washer 3, so that each structure is linked, and an offset arc groove 21 is provided on one side of each hinge block 20, and one end of the limit sleeve 2 is threadedly connected to the docking sleeve 22, and one end of the docking sleeve 22 is fixedly provided with a constraint cylinder 23, which is sleeved on the outside of the shaft rod 1, and the constraint cylinder 23 and the oil storage seat 11 provide initial radial positioning, and can also prevent oil from leaking to the shaft end.

[0034] The specific working principle is as follows;

[0035] Installation and positioning phase, such as Figure 1 、 2 As shown in Figures 3 and 7, the pump shaft 1 sequentially passes through the restraining sleeve 23, the docking sleeve 22, the oil reservoir 11, and the threaded barrel 15. The restraining sleeve 23 and the oil reservoir 11 provide initial radial positioning. At this point, the lubricating balls 14 on the inner wall of the oil reservoir 11 initially contact the surface of the shaft 1, and the lubricating oil in the guide cavity 12 submerges the lubricating balls 14, forming an initial lubrication interface. The threaded connection between the docking sleeve 22 and the limiting sleeve 2 secures the axial position. The restraining sleeve 23 prevents oil from leaking toward the shaft end, preventing it from being thrown out during shaft 1 rotation.

[0036] Clamping adjustment stage, as attached Figure 3 、 4, 5, 6, 7 and 8, by rotating the blocking disk 17, the blocking disk 17 drives the inner wire ring 18 to rotate, and the inner wire ring 18 is threadedly connected to the wire drum 15, thereby causing the wire drum 15 to move axially along the extension ring 16 in the middle of the extension ring 16, and when the wire drum 15 moves, the oil storage seat 11 and the center ring 7 are driven to move;

[0037] When the center ring 7 is displaced, the hinge block 20 is driven to be displaced, and when the hinge block 20 is displaced, the traction rod 8 is driven to be displaced, thereby enabling the adjustment rod 4 to rotate along the axis point where the adjustment rod 4 and the washer 3 are connected, and then each adjustment rod 4 and the elastic resistance member 5 can be clamped to the shaft rod 1.

[0038] Further, when the adjusting rod 4 is clamped on the outside of the shaft 1, as shown in the attached Figure 3 、 4 As shown in , 5, 6 and 8, the pressing ball 6 contacts the shaft 1 and the elastic contact member 5 is deformed by force. The elastic contact member 5 continuously drives the pressing ball 6 to pressurize the shaft 1 through its own elasticity, thereby achieving the function of clamping and positioning the shaft 1;

[0039] Moreover, when the adjusting rods 4 converge axially toward the shaft 1, the fitting 10 first contacts the outside of the shaft 1. At the same time, the fitting 10 can also slide on the arc block 9 to automatically adjust the angle of the fitting 10, thereby making the fitting 10 fit the shaft 1 to ensure the installation stability of the shaft 1.

[0040] In addition, by adjusting the positions of each fitting 10 and the elastic resistance member 5, the function of clamping and positioning the shaft rods 1 and bearings of different sizes can be achieved, and the fitting 10 can also automatically adjust the corresponding angle when it contacts the shaft rod 1, and automatic centering control can be achieved without additional adjustment.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. The perforated end cover structure of the sliding bearing of a multi-stage pump includes a limit sleeve sleeved on the outside of the shaft, which is characterized by: The limiting sleeve is provided with a supporting assembly; The support assembly includes a washer arranged in a limiting sleeve, and a plurality of adjustment rods are hinged on the washer, and an elastic resistance member is fixedly provided at one end of each adjustment rod, and a pressure ball is embedded in one side of each of the plurality of elastic resistance members; A center ring is provided on the top of the washer, and a plurality of traction rods are provided on the top of the center ring. An arc block is fixedly provided on one side of the adjustment rod, and a fitting is slidably connected to the arc block. An oil storage seat is provided at the bottom of the center ring, and a guide cavity is opened on the oil storage seat; A wire drum is fixedly provided at the bottom of the diversion cavity, and an extension ring is fixedly provided on the side of the washer away from the adjustment rod; The end of the extension ring away from the gasket is rotatably connected to the blocking disk, the middle of the blocking disk is fixedly provided with an inner wire ring, and the outer side of the inner wire ring is provided with a sealing ring; The sealing ring extends to one end of the extension ring and is rotatably connected to the extension ring, and the inner wire ring is sleeved on the outside of the wire drum and is threadedly connected to the wire drum; A plurality of hinge blocks are fixedly provided on one side of the center ring away from the oil storage seat, and each hinge block is located at the bottom end of a corresponding traction rod, and the top of the traction rod extends to the arc block and is rotatably connected to the arc block; The traction rod covers the top end of the hinge block and is rotatably connected to the hinge block, and one side of each hinge block is provided with a staggered arc groove.

2. The multi-stage pump sliding bearing perforated end cover structure according to claim 1, characterized in that: The inner wall of the oil storage seat is provided with a plurality of limiting holes which are all communicated with the flow guide cavity, and a lubricating ball is rotatably connected in each of the limiting holes.

3. The multi-stage pump sliding bearing perforated end cover structure according to claim 1, characterized in that: One end of the limiting sleeve is threadedly connected to a docking sleeve, and one end of the docking sleeve is fixedly provided with a restraining cylinder, and the restraining cylinder is sleeved on the outside of the shaft.

Images