Oil-submerged pump adopting centralizing alloy shaft sleeve oil groove structure

Abstract

The utility model discloses an oil-submerged pump adopting a centralizing alloy shaft sleeve oil groove structure, which comprises a shell and a pump shaft, a multi-stage impeller is arranged on the outer wall of the pump shaft, an oil inlet cap is fixed at the top end of the shell through a bolt, a filter box is arranged at the top of the oil inlet cap, and a filter screen is clamped in the filter box. The top of the filter box is rotationally connected with a rotating rod through a bearing, a plurality of rotational flow blades are arranged on the outer wall of the rotating rod, and a cleaning brush is arranged on the outer wall of one side of the rotating rod. During oil pumping, the rotational flow blades can be driven to rotate when oil flows, the rotational flow blades can drive the rotating rod to rotate, the rotating rod can drive the cleaning brush to rotate to clean the filter screen, and the problem that impurities filtered out on the outer wall of the filter screen are attached to the filter screen, and the oil pumping efficiency is affected can be solved. Meanwhile, the lubricating groove of the centering bearing assembly is formed in the outer diameter of the bearing shaft sleeve and is machined into a spiral structure, and the phenomenon that included angle protrusions are generated at the joint of the lubricating groove and the support or the inner hole of the guide wheel is eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of submersible pumps, in particular to a submersible pump adopting a structure of a centering alloy bushing oil groove. Background Art

[0002] Submersible pumps can be roughly divided into four types according to their main uses: submersible pumps for gas stations; submersible pumps for oil depots (fueling ships) and submersible pumps for unloading oil from the loading arm of tank trucks; submersible electric pumps for crude oil in oil wells; submersible centrifugal pumps are multi-stage centrifugal pumps, mainly composed of multi-stage centrifugal impellers, diffusers, pump shafts, pump casings, upper and lower joints, etc. Multiple sections of pumps can be connected in series through connecting flanges and spline sleeves to meet the requirements of lift.

[0003] A submersible pump centering alloy bearing is arranged inside the submersible pump. The centering bearing has the functions of centering and protecting the pump shaft, preventing the radial swing of the pump shaft. The submersible pump centering alloy bearing is divided into a bearing insert and a bushing. There are two structures in the bearing insert, with lubricating grooves and without lubricating grooves. Because the bearing insert with an oil groove has low processing efficiency and high cost, but has higher operating reliability than the centering alloy bearing without an oil groove. The existing lubricating groove of the bearing insert is a straight groove, and an included angle is easily generated at the connection between the straight groove and the hole. Although there is sufficient oil for lubrication, due to the interference fit during the installation process of the included angle, the part of the included angle is easy to bulge and rub against the bushing during high-speed operation, which is easy to cause sintering damage.

[0004] For example, a submersible pump with the publication number CN106357040A and the publication date January 25, 2017, includes a motor assembly and a pump assembly. The motor assembly drives the pump assembly to operate. Among them, it also includes a motor housing. The motor assembly is installed inside the motor housing. An oil inlet is provided on the motor housing. The oil inlet communicates with the oil suction port of the pump assembly through the internal space of the motor housing. The oil inlet is a long hole extending along the circumference of the motor housing.

[0005] In the above and in the prior art, a filter screen is generally provided at the oil inlet end of the outermost submersible centrifugal pump. Impurities in the oil are easily attached to the filter screen, resulting in a slow oil pumping rate when pumping oil. When the filter screen is completely blocked, the oil cannot be pumped out. And there are two forms of the components of the centering alloy bearing. One is that the bearing insert is installed in the inner hole of the bracket, and the other is that the bearing insert is installed in the inner hole of the guide wheel, both of which play a role in centering and wear resistance. However, both of these forms have a common problem that due to the design of the lubricating groove of the bearing insert during high-speed operation, it is easy to cause friction between the bearing insert and the bushing and easy to cause sintering damage. Therefore, it is urgent to design a submersible pump adopting a structure of a centering alloy bushing oil groove to solve the above problems. Content of the Utility Model

[0006] The purpose of the utility model is to provide a submersible pump adopting a structure of a centering alloy bushing oil groove to solve the above deficiencies in the prior art.

[0007] To achieve the above object, the present utility model provides the following technical solutions:

[0008] A submersible pump adopting a structure of a centering alloy bushing oil groove, comprising a housing and a pump shaft. A plurality of stages of impellers are arranged on the outer wall of the pump shaft. An oil inlet cap is fixed to the top end of the housing by bolts, and a filter box is arranged on the top of the oil inlet cap. A filter net is clamped and placed inside the filter box. A rotating rod is rotatably connected to the top of the filter box through a bearing, and a plurality of swirl vanes are arranged on the outer wall of the rotating rod. A cleaning brush is arranged on the outer wall of one side of the rotating rod, and the cleaning brush contacts the filter net. A centering bearing assembly is arranged on the outer wall of the pump shaft, and the centering bearing assembly includes a bearing insert and a bearing bushing. A lubricating groove is formed on the outer wall of the bearing bushing, and the lubricating groove spirals along the axis of the pump shaft. The bearing insert is sleeved outside the bearing bushing, and the bearing insert is embedded on the plurality of stages of impellers.

[0009] Further, a cavity is formed inside the filter box, and a moving block is slidably connected inside the cavity. A plug rod is integrally connected to the outer wall of the moving block.

[0010] Further, insertion holes are formed on the outer walls of the top and bottom of the filter net, and the plug rod is inserted into the insertion holes.

[0011] Further, guide rods are arranged on the inner wall of the cavity, and the moving block is slidably sleeved outside the guide rods. A push block is arranged on the outer wall of one side of the moving block, and the push block is slidably connected to the outer wall of the filter box.

[0012] Further, a spring connected to the moving block is arranged on the inner wall of the cavity, and the spring is sleeved outside the guide rod.

[0013] Further, a flow guiding block is arranged on the inner wall of the housing. The plurality of stages of impellers are respectively abutted against the bearing insert and the flow guiding block. A conveying flow channel is formed between the plurality of stages of impellers and the flow guiding block, and the conveying flow channel is distributed in a multi-stage curve structure.

[0014] Further, a support bearing is arranged on the inner wall of the housing, and the outer wall of the pump shaft is connected to the inner wall of the support bearing.

[0015] In the above technical solution, the submersible pump adopting the structure of the centering alloy bushing oil groove provided by the present utility model

[0016] 1. By providing a filter box, a filter screen, a rotating rod, a swirl vane, a cleaning brush, a pump shaft, a centering bearing assembly, a bearing insert sleeve, and a lubrication groove, when pumping oil, the flowing oil will drive the swirl vane to rotate, the swirl vane will drive the rotating rod to rotate, and the rotating rod will drive the cleaning brush to rotate to clean the filter screen, which can avoid the problem that the impurities filtered out on the outer wall of the filter screen adhere to the filter screen and affect the oil pumping efficiency. At the same time, the lubrication groove of the centering bearing assembly is arranged on the outer diameter of the bearing bushing and is processed into a spiral structure, eliminating the phenomenon of angular protrusions at the connection between the lubrication groove and the bracket or the inner hole of the guide wheel;

[0017] 2. By providing a cavity, a moving block, an insertion rod, a jack, a pushing block, a guide rod, and a spring, pushing the pushing block can drive the moving block and the insertion rod to move, enabling the insertion rod to move out of the inside of the jack, and thus the filter screen can be removed from the filter box, which is convenient for cleaning the impurities that cannot be brushed off by the cleaning brush stuck inside the mesh holes of the filter screen. When the filter screen is damaged, it can also be replaced;

[0018] 3. By providing a support bearing and a conveying flow channel, the support bearing can support the pump shaft at both ends of the pump shaft, and the design of the multi-stage curve-shaped conveying flow channel can greatly increase the conveying head of the liquid oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0020] Figure 1 FIG. is an internal structure schematic diagram provided for an embodiment of a submersible pump with a centering alloy bushing oil groove structure according to the present invention.

[0021] Figure 2 FIG. is a schematic diagram of the structure of a centering alloy bearing part provided for an embodiment of a submersible pump with a centering alloy bushing oil groove structure according to the present invention.

[0022] Figure 3 FIG. is a schematic diagram of the structure of a filter box provided for an embodiment of a submersible pump with a centering alloy bushing oil groove structure according to the present invention.

[0023] Figure 4 FIG. is a schematic diagram of the disassembly and assembly structure of a filter screen provided for an embodiment of a submersible pump with a centering alloy bushing oil groove structure according to the present invention.

[0024] DESCRIPTION OF THE REFERENCE NUMERALS:

[0025] 1. Housing; 2. Flow guiding block; 3. Pump shaft; 4. Centering bearing assembly; 5. Bearing insert sleeve; 6. Lubrication groove; 7. Oil inlet cap; 8. Filter box; 9. Filter net; 10. Rotating rod; 11. Vortex blade; 12. Cleaning brush; 13. Cavity; 14. Moving block; 15. Plug rod; 16. Jack; 17. Pushing block; 18. Guide rod; 19. Spring; 20. Multistage impeller; 21. Delivery flow channel; 22. Support bearing; 23. Bearing bushing. Detailed implementation manners

[0026] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further introduced in detail below in conjunction with the accompanying drawings.

[0027] As Figures 1-4 shown, the submersible pump adopting the centering alloy bushing oil groove structure provided by the embodiment of the present utility model includes a housing 1 and a pump shaft 3. A multistage impeller 20 is arranged on the outer wall of the pump shaft 3. An oil inlet cap 7 is fixed to the top of the housing 1 by bolts, and a filter box 8 is arranged on the top of the oil inlet cap 7. A filter net 9 is clamped and placed inside the filter box 8. The top of the filter box 8 is rotatably connected to a rotating rod 10 through a bearing, and a plurality of vortex blades 11 are arranged on the outer wall of the rotating rod 10. A cleaning brush 12 is arranged on the outer wall of one side of the rotating rod 10, and the cleaning brush 12 is in contact with the filter net 9. A centering bearing assembly 4 is arranged on the outer wall of the pump shaft 3, and the centering bearing assembly 4 includes a bearing insert sleeve 5 and a bearing bushing 23. A lubrication groove 6 is formed on the outer wall of the bearing bushing 23, and the lubrication groove 6 spirals along the axis of the pump shaft 3. The bearing insert sleeve 5 is sleeved outside the bearing bushing 23, and the bearing insert sleeve 5 is embedded on the multistage impeller 20.

[0028] The submersible pump with a structure of a centering alloy bushing oil groove provided by the utility model includes a housing 1 and a pump shaft 3. A multi-stage impeller 20 is arranged on the outer wall of the pump shaft 3. An oil inlet cap 7 is fixed to the top of the housing 1 by bolts, and a filter box 8 is arranged on the top of the oil inlet cap 7. A filter screen 9 is clamped and placed inside the filter box 8. A rotating rod 10 is rotatably connected to the top of the filter box 8 through a bearing, and a plurality of swirl vanes 11 are arranged on the outer wall of the rotating rod 10. A cleaning brush 12 is arranged on the outer wall of one side of the rotating rod 10, and the cleaning brush 12 contacts the filter screen 9. A centering bearing assembly 4 is arranged on the outer wall of the pump shaft 3, and the centering bearing assembly 4 includes a bearing insert 5 and a bearing bushing 23. A lubricating groove 6 is formed on the outer wall of the bearing bushing 23, and the lubricating groove 6 spirals along the axis of the pump shaft 3. The bearing insert 5 is sleeved outside the bearing bushing 23, and the bearing insert 5 is embedded on the multi-stage impeller 20. The lubricating groove 6 of the centering bearing assembly 4 is arranged on the outer diameter of the bearing bushing 23 and is processed into a spiral structure, eliminating the phenomenon of angular protrusions at the connection between the lubricating groove 6 and the inner hole of the bracket or the guide wheel. When the swirl vane 11 drives the rotating rod 10 to rotate, the rotating rod 10 will drive the cleaning brush 12 to rotate to clean the impurities attached to the filter screen 9, avoiding the influence of the attached impurities on oil pumping.

[0029] By setting: during oil pumping, the flowing oil will drive the swirl vane 11 to rotate, the swirl vane 11 will drive the rotating rod 10 to rotate, and the rotating rod 10 will drive the cleaning brush 12 to rotate to clean the filter screen 9, which can avoid the problem that the impurities filtered out on the outer wall of the filter screen 9 adhere to the filter screen 9 and affect the oil pumping efficiency. At the same time, the lubricating groove 6 of the centering bearing assembly 4 is arranged on the outer diameter of the bearing bushing 23 and is processed into a spiral structure, eliminating the phenomenon of angular protrusions at the connection between the lubricating groove 6 and the inner hole of the bracket or the guide wheel.

[0030] In an embodiment provided by the utility model, as Figure 4 shown, a cavity 13 is formed inside the filter box 8, and a moving block 14 is slidably connected inside the cavity 13. A plug rod 15 is integrally connected to the outer wall of the moving block 14, and the moving block 14 will drive the plug rod 15 to move when it moves.

[0031] In another embodiment provided by the utility model, as Figure 4 shown, insertion holes 16 are formed on the outer walls of the top and bottom of the filter screen 9, and the plug rod 15 is inserted into the insertion holes 16, so that the filter screen 9 can be fixed on the filter box 8.

[0032] In still another embodiment provided by the utility model, as Figure 1 and Figure 4As shown, guide rods 18 are provided on the inner wall of the cavity 13, and the moving block 14 is slidably sleeved outside the guide rods 18. A push block 17 is provided on the outer wall of one side of the moving block 14, and the push block 17 is slidably connected to the outer wall of the filter box 8. The moving block 14 can be pushed to move through the push block 17.

[0033] In an embodiment provided by the present utility model, as Figure 4 shown, a spring 19 connected to the moving block 14 is provided on the inner wall of the cavity 13, and the spring 19 is sleeved outside the guide rod 18. The elastic force of the spring 19 has a pushing force on the moving block 14.

[0034] In another embodiment provided by the present utility model, as Figure 1 shown, a flow guiding block 2 is provided on the inner wall of the housing 1. The multi-stage impellers 20 are respectively abutted against the bearing insert 5 and the flow guiding block 2. A conveying flow channel 21 is formed between the multi-stage impellers 20 and the flow guiding block 2, and the conveying flow channel 21 is distributed in a multi-stage curved structure. The multi-stage curved conveying flow channel 21 can improve the conveying head of the liquid oil.

[0035] In still another embodiment provided by the present utility model, as Figure 1 shown, a support bearing 22 is provided on the inner wall of the housing 1, and the outer wall of the pump shaft 3 is connected to the inner wall of the support bearing 22. The support bearing 22 can support the pump shaft 3 and improve the stability.

[0036] Working principle: The lubricating groove 6 of the centering bearing assembly 4 is provided on the outer diameter of the bearing sleeve 23 and is processed into a spiral structure, eliminating the phenomenon of angular protrusions at the connection between the lubricating groove 6 and the bracket or the inner hole of the guide wheel. The support bearing 22 can support the pump shaft 3 at both ends of the pump shaft 3, and the design of the multi-stage curved conveying flow channel 21 can greatly improve the conveying head of the liquid oil. When pumping oil, the transmission structure connected to the submersible pump will drive the pump shaft 3 to rotate. The pump shaft 3 will drive the multi-stage impellers 20 to rotate and pump oil. The filter net 9 can filter out impurities in the oil, and when the oil flows, it will drive the multi-stage impellers 20 to rotate. The multi-stage impellers 20 will drive the rotating rod 10 to rotate, and the rotating rod 10 will drive the cleaning brush 12 to rotate to clean the filter net 9, which can avoid the problem that the impurities filtered out on the outer wall of the filter net 9 adhere to the filter net 9 and affect the oil pumping efficiency, realizing the self-cleaning function. Then, when there are stuck impurities in the mesh holes of the filter net 9 that cannot be cleaned by the cleaning brush 12, or when the filter net 9 is damaged, pushing the push block 17 drives the moving block 14 and the insertion rod 15 to move, enabling the insertion rod 15 to move out of the insertion hole 16, and then pulling the filter net 9 to both sides of the filter box 8, the filter net 9 can be removed from the filter box 8 to clean the impurities stuck in the mesh holes of the filter net 9, or replace the filter net 9 when the filter net 9 is damaged.

[0037] Only some exemplary embodiments of the present utility model are described by way of illustration. Without doubt, for those of ordinary skill in the art, various different ways can be used to modify the described embodiments without departing from the spirit and scope of the present utility model. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. A submersible oil pump adopting a righting alloy sleeve oil groove structure comprises a housing (1) and a pump shaft (3), characterized in that: A multi-stage impeller (20) is arranged on the outer wall of the pump shaft (3); an oil inlet cap (7) is fixed to the top of the housing (1) by bolts, and a filter box (8) is arranged on the top of the oil inlet cap (7); a filter screen (9) is clamped inside the filter box (8); a rotating rod (10) is rotatably connected to the top of the filter box (8) by a bearing, and a plurality of swirl blades (11) are arranged on the outer wall of the rotating rod (10); a cleaning brush (11) is arranged on the outer wall of one side of the rotating rod (10) 12), and the cleaning brush (12) is in contact with the filter screen (9), a straightening bearing assembly (4) is arranged on the outer wall of the pump shaft (3), and the straightening bearing assembly (4) comprises a bearing sleeve (5) and a bearing sleeve (23), and a lubrication groove (6) is opened on the outer wall of the bearing sleeve (23), and the lubrication groove (6) is spirally arranged along the axis of the pump shaft (3), the bearing sleeve (5) is sleeved on the outside of the bearing sleeve (23), and the bearing sleeve (5) is embedded in the multi-stage impeller (20).

2. The submersible oil pump with a centralizing alloy sleeve oil groove structure according to claim 1 is characterized in that: A cavity (13) is provided inside the filter box (8), and a moving block (14) is slidably connected inside the cavity (13), and an insertion rod (15) is integrally connected to the outer wall of the moving block (14).

3. The submersible oil pump with a centralizing alloy sleeve oil groove structure according to claim 2 is characterized in that: The outer walls of the top and bottom of the filter screen (9) are both provided with insertion holes (16), and the insertion rod (15) is inserted into the inside of the insertion hole (16).

4. The submersible oil pump with a centralizing alloy sleeve oil groove structure according to claim 3 is characterized in that: A guide rod (18) is provided on the inner wall of the cavity (13), and the moving block (14) is slidably sleeved on the outside of the guide rod (18); a push block (17) is provided on the outer wall of one side of the moving block (14), and the push block (17) is slidably connected to the outer wall of the filter box (8).

5. The submersible oil pump with a centralizing alloy sleeve oil groove structure according to claim 4 is characterized in that: A spring (19) connected to the moving block (14) is arranged on the inner wall of the cavity (13), and the spring (19) is sleeved on the outside of the guide rod (18).

6. The submersible oil pump with a centralizing alloy sleeve oil groove structure according to claim 5, characterized in that: A guide block (2) is arranged on the inner wall of the housing (1); the multi-stage impeller (20) is respectively supported by the bearing sleeve (5) and the guide block (2); a conveying flow channel (21) is formed between the multi-stage impeller (20) and the guide block (2); and the conveying flow channel (21) is distributed in a multi-stage curved structure.

7. The submersible oil pump with a centralizing alloy sleeve oil groove structure according to claim 6 is characterized in that: A support bearing (22) is provided on the inner wall of the housing (1), and the outer wall of the pump shaft (3) is connected to the inner wall of the support bearing (22).

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