Loader applied to high-lift submersible pump

Abstract

The loader comprises a shell and a bearing shaft, and the shell comprises a steel pipe mechanism, an upper support and a lower support; a lower thrust assembly with a self-aligning function and at least one upper thrust assembly with a self-aligning function are sequentially inserted into the bearing shaft from bottom to top; a reserved water storage space for preventing water in the water pump loader from overflowing during use is formed between the bottom of the upper bracket and the top of the steel pipe mechanism; the steel pipe mechanism, the lower anti-thrust assembly and all the upper anti-thrust assemblies are matched with one another to form a water circulation space. The high-lift submersible pump is high in bearing capacity and good in heat dissipation performance, the lift of the high-lift submersible pump can be improved while the service life of the high-lift submersible pump is effectively prolonged, and then the application range and the use performance of the high-lift submersible pump can be expanded. In addition, by means of the center adjusting function of the lower anti-thrust assembly and the upper anti-thrust assembly, the running stability and precision of the anti-thrust device can be guaranteed, and the service life of the anti-thrust device can be further effectively prolonged.

Description

Technical Field

[0001] The invention relates to a load carrier, in particular to a load carrier used in a high-lift submersible pump. Background Art

[0002] With the increasing water consumption and more drought weather, the groundwater level in some areas has continued to decline, especially in mountainous areas where water is difficult to obtain, the demand for high-lift submersible pumps has increased significantly.

[0003] A high-lift submersible pump generally includes a water pump, a motor, and a load-bearing device arranged between the water pump and the motor, wherein the load-bearing device is an important component of the high-lift submersible pump, and its main function is to improve the head and load-bearing capacity of the high-lift submersible pump, and plays a key role in improving the comprehensive performance of the high-lift submersible pump. The existing load-bearing device generally includes a casting shell, a load-bearing shaft, a thrust bearing seat, and a thrust bearing. However, when the high-lift submersible pump is working, the motor power and the internal axial force are both large, which makes the thrust bearing bear a large axial force, and the thrust bearing has a large bearing pressure ratio, which makes the thrust bearing very easy to be damaged, seriously affecting the service life of the load-bearing device. In addition, since the load-bearing capacity of the existing load-bearing device is relatively small, in order to extend the service life of the load-bearing device as much as possible, it is necessary to limit the head of the high-lift submersible pump, which makes the head of the high-lift submersible pump relatively small, which will seriously affect the scope of application and performance of the high-lift submersible pump. Summary of the invention

[0004] In order to solve the above deficiencies in the prior art, the present invention aims to provide a load carrier for use in a high-lift submersible pump, so as to achieve the purpose of improving the application scope, performance and service life of the high-lift submersible pump.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a carrier used in a high-lift submersible pump, comprising a shell and a bearing shaft rotatably connected to the shell, the shell comprising a steel pipe mechanism, an upper bracket fixed to the top of the steel pipe mechanism and a lower bracket fixed to the bottom of the steel pipe mechanism; the part of the bearing shaft located in the steel pipe mechanism is sequentially inserted with a lower thrust assembly with a centering function and at least one upper thrust assembly with a centering function from bottom to top; a reserved water storage space is provided between the bottom of the upper bracket and the top of the steel pipe mechanism to prevent water in the water pump carrier from overflowing during use; the steel pipe mechanism, the lower thrust assembly and all the upper thrust assemblies cooperate with each other to form a water circulation space for water circulation and heat dissipation in the water pump carrier during use.

[0006] As a limitation of the present invention, the lower bracket includes a lower bracket body and a first annular protrusion fixed on the top of the lower bracket body and having a top surface that is an arc surface.

[0007] As a further definition of the present invention, the lower thrust assembly includes a lower thrust bearing seat inserted on the load-bearing shaft, a lower thrust bearing inserted on the load-bearing shaft and pressed against the lower thrust bearing seat, and a lower thrust plate inserted on the load-bearing shaft and pressed against the lower thrust bearing; the lower thrust bearing seat includes a lower thrust bearing seat body and a first annular groove formed at the bottom of the lower thrust bearing seat body; the first annular protrusion is matched with the first annular groove so that the lower thrust bearing seat can be movably adjusted in position on the lower bracket to realize the centering function of the lower thrust assembly.

[0008] As a further limitation of the present invention, the upper thrust assembly includes a mounting seat inserted on the load-bearing shaft, an upper thrust bearing seat inserted on the load-bearing shaft, an upper thrust bearing inserted on the load-bearing shaft and pressed against the upper thrust bearing seat, and an upper thrust plate inserted on the load-bearing shaft and pressed against the upper thrust bearing; the mounting seat includes a mounting seat body and a second annular protrusion fixed on the top of the mounting seat body and having a circular arc surface as the top surface; the upper thrust bearing seat includes an upper thrust bearing seat body and a second annular groove provided at the bottom of the upper thrust bearing seat body; the second annular protrusion is adapted to the second annular groove so that the upper thrust bearing seat can movably adjust its position on the mounting seat to realize the centering function of the lower thrust assembly.

[0009] As another limitation of the present invention, the steel pipe mechanism includes an upper steel pipe and at least one middle steel pipe arranged in sequence from top to bottom, wherein the middle steel pipe is inserted at a position between the lower bracket and the upper thrust assembly close to the lower bracket or inserted at a position between two adjacent upper thrust assemblies, and the upper steel pipe is inserted at a position between the upper bracket and the upper thrust assembly close to the upper bracket; the upper bracket and the lower bracket are fixed together by at least two fastening bolt members.

[0010] As a further limitation of the present invention, the bearing shaft and the upper bracket are sealed by a sealing mechanism, and the sealing mechanism includes a mechanical sealing component, an oil sealing component and a water sealing component arranged in sequence from top to bottom.

[0011] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art: (1) The present invention adopts a structural form combining a housing, a bearing shaft, a lower thrust assembly and at least one upper thrust assembly, wherein the lower thrust bearing in the lower thrust assembly and the upper thrust bearing in at least one upper thrust assembly can both bear axial force, the load borne by the lower thrust bearing and each upper thrust bearing is relatively small and the bearing specific pressure is also relatively small, and the lower thrust assembly and the upper thrust assembly both have a self-aligning function, which can ensure the smoothness and accuracy of the operation of the present invention, which makes the lower thrust bearing and the upper thrust bearing not easy to be damaged, and can effectively extend the service life of the load carrier. In addition, the present invention is provided with a reserved water storage space, and the water in the load carrier can further reserve the water storage space when the water in the load carrier expands due to heat, which can avoid the damage to the load carrier due to water overflowing from the load carrier. The steel pipe structure and the water circulation space in the present invention are both conducive to the heat dissipation of the load carrier, which can further effectively improve the service life of the present invention. The present invention has high bearing capacity and good heat dissipation, which can make the high-lift submersible pump have a higher head, and can expand the scope of application and performance of the high-lift submersible pump.

[0012] (2) The first annular protrusion in the present invention is matched with the first annular groove so that the lower thrust bearing seat can be movably adjusted on the lower bracket to achieve the centering function of the lower thrust assembly. The second annular protrusion is matched with the second annular groove so that the upper thrust bearing seat can be movably adjusted on the mounting seat to achieve the centering function of the lower thrust assembly. When in use, the present invention can adapt to the eccentricity, deflection or other errors of the load-bearing shaft, thereby ensuring the stability and accuracy of the operation of the present invention, thereby effectively improving the service life of the present invention.

[0013] (3) The steel pipe structure of the present invention adopts a structural form of an upper steel pipe and at least one middle steel pipe, which is easy to assemble. In addition, the middle steel pipe and the upper steel pipe have good heat dissipation properties, which can avoid damage to the components of the present invention due to excessive temperature, thereby effectively improving the service life of the present invention.

[0014] (4) The mechanical seal component, the oil seal component and the water seal component in the present invention can form a three-layer sealing structure, which can effectively improve the sealing performance of the present invention.

[0015] In summary, the lower thrust assembly and at least one upper thrust assembly in the present invention can form a multi-level bearing structure with strong bearing capacity, and the heat dissipation performance of the present invention is good. While effectively improving the service life of the present invention, the head of the high-lift submersible pump can also be improved, thereby expanding the scope of application and performance of the high-lift submersible pump. In addition, the centering function of the lower thrust assembly and the upper thrust assembly in the present invention can ensure the stability and accuracy of the operation of the present invention, and can further effectively improve the service life of the present invention. The present invention is suitable for use between the motor and the water pump installed in the high-lift submersible pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the lower bracket in an embodiment of the present invention; Figure 3 It is a structural schematic diagram of a mounting base in an embodiment of the present invention; Figure 4 A schematic diagram of the structure of an upper bracket in an embodiment of the present invention; In the figure: 1. Middle steel pipe; 2. Upper steel pipe; 3. upper bracket; 31. third annular groove; 4. Lower bracket; 41. Lower bracket body; 42. First annular protrusion; 43. First protrusion through hole; 44. First body vertical through hole; 5. Stud bolt; 6. Fastening nut; 7. Load-bearing shaft; 8. Lower thrust bearing seat; 9. First positioning screw; 10. First countersunk screw; 11. Lower thrust bearing; 12. Lower thrust plate; 13. Mounting seat; 131. Mounting seat body; 132. Second annular protrusion; 133. Second protrusion through hole; 134. Second body vertical through hole; 14. Second positioning screw; 15. Upper thrust bearing seat; 16. Second countersunk screw; 17. Upper thrust bearing; 18. Upper thrust plate; 19. Water seal component; 20. Oil seal component; 21. Mechanical seal component. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and understand the present invention, and are not used to limit the present invention.

[0019] Embodiment A load carrier used in a high-lift submersible pump like Figure 1 As shown, this embodiment includes a housing, a load-bearing shaft 7 rotatably connected in the housing, a lower thrust assembly with a centering function, and at least one upper thrust assembly with a centering function. In this embodiment, two upper thrust assemblies are provided.

[0020] The shell includes a steel pipe mechanism, an upper bracket 3 fixed on the top of the steel pipe mechanism, and a lower bracket 4 fixed on the bottom of the steel pipe mechanism. The steel pipe mechanism includes an upper steel pipe 2 and at least one middle steel pipe 1 arranged in sequence from top to bottom, wherein the middle steel pipe 1 is inserted at a position between the lower bracket 4 and the upper thrust assembly close to the lower bracket 4 or inserted at a position between two adjacent upper thrust assemblies, the upper steel pipe 2 is inserted at a position between the upper bracket 3 and the upper thrust assembly close to the upper bracket 3, and the upper bracket 3 and the lower bracket 4 are fixed together by at least two fastening bolt members. Specifically, in this embodiment, two middle steel pipes 1 and two fastening bolt members are provided, wherein the first middle steel pipe 1 is inserted at a position between the lower bracket 4 and the upper thrust assembly close to the lower bracket 4, the second middle steel pipe 1 is inserted at a position between two adjacent upper thrust assemblies, and the upper steel pipe 2 is inserted at a position between the upper bracket 3 and the upper thrust assembly close to the upper bracket 3. Two fastening bolt components are arranged relatively on the outside of the steel pipe mechanism. The fastening bolt components include a stud bolt 5 and two fastening nuts 6. The stud bolt 5 is vertically inserted between the upper bracket 3 and the lower bracket 4. The upper end of the stud bolt 5 is fixedly connected to the upper bracket 3 through a fastening nut 6, and the lower end of the stud bolt 5 is fixedly connected to the lower bracket 4 through a fastening nut 6. The two fastening bolt components can apply extrusion force to the upper bracket 3 and the lower bracket 4, thereby fastening the upper bracket 3, the steel pipe mechanism and the lower bracket 4 as a whole. The upper bracket 3 is an existing structure. The bearing shaft 7 and the upper bracket 3 are sealed by a sealing mechanism. The sealing mechanism includes a mechanical sealing component 21, an oil sealing component 20 and a water sealing component 19 arranged in sequence from top to bottom. Figure 2 As shown, the lower bracket 4 includes a lower bracket body 41 and a first annular protrusion 42 with a circular arc surface fixed on the top of the lower bracket body 41, a first positioning screw 9 is fixed on the lower bracket body 41, and four first body vertical through holes 44 are circumferentially spaced apart on the lower bracket body 41, and a first protrusion through hole 43 is respectively provided at a position corresponding to the four first body vertical through holes 44 on the first annular protrusion 42.

[0021] The part of the bearing shaft 7 located inside the steel pipe mechanism is sequentially inserted with a lower thrust assembly with a self-aligning function and two upper thrust assemblies with a self-aligning function from bottom to top. The lower thrust assembly includes a lower thrust bearing seat 8 inserted on the bearing shaft 7, a lower thrust bearing 11 inserted on the bearing shaft 7 and pressed against the lower thrust bearing seat 8, and a lower thrust plate 12 inserted on the bearing shaft 7 and pressed against the lower thrust bearing 11. The lower thrust bearing seat 8 is fixedly connected to the lower thrust bearing 11 by a first countersunk screw 10, and a space for water circulation is reserved between the outer side of the lower thrust bearing 11 and the outer side of the lower thrust plate 12 and the inner wall of the steel pipe mechanism. The lower thrust bearing seat 8 includes a main body of the lower thrust bearing seat 8 and a first annular groove provided at the bottom of the main body of the lower thrust bearing seat 8. The first annular protrusion 42 is adapted to the first annular groove so that the lower thrust bearing seat 8 can be movably adjusted on the lower bracket 4 to achieve the centering function of the lower thrust assembly. A first positioning groove is provided on the main body of the lower thrust bearing seat 8 at a position corresponding to the first positioning screw 9 on the main body 41 of the lower bracket, and the top of the first positioning screw 9 on the main body 41 of the lower bracket is inserted into the first positioning groove.

[0022] The upper thrust assembly includes a mounting seat 13 inserted on the bearing shaft 7, an upper thrust bearing seat 15 inserted on the bearing shaft 7, an upper thrust bearing 17 inserted on the bearing shaft 7 and pressed against the upper thrust bearing seat 15, and an upper thrust plate 18 inserted on the bearing shaft 7 and pressed against the upper thrust bearing 17. The upper thrust bearing seat 15 and the upper thrust bearing 17 are fixedly connected by a second countersunk screw 16. Space for water circulation is reserved between the outer side of the upper thrust bearing seat 15, the outer side of the upper thrust bearing 17, and the outer side of the upper thrust plate 18 and the inner wall of the steel pipe mechanism. Figure 3As shown, the mounting seat 13 includes a mounting seat body 131 and a second annular protrusion 132 fixed on the top of the mounting seat body 131 with a circular arc surface. The mounting seat body 131 is fixed with a second positioning screw 14. The mounting seat body 131 is provided with four second body vertical through holes 134 spaced along the circumferential direction. The second annular protrusion 132 is provided with a second protrusion through hole 133 at positions corresponding to the four second body vertical through holes 134. The upper thrust bearing seat 15 includes an upper thrust bearing seat body and a second annular groove provided at the bottom of the upper thrust bearing seat body. The second annular protrusion 132 is adapted to the second annular groove so that the upper thrust bearing seat 15 can be movably adjusted on the mounting seat 13 to achieve the centering function of the lower thrust assembly. A second positioning groove is provided on the upper thrust bearing seat body at a position corresponding to the second positioning screw 14 on the mounting seat body 131. The top of the second positioning screw 14 on the mounting seat body 131 is inserted into the second positioning groove. It should be noted that the steel pipe mechanism, the lower thrust assembly and all the upper thrust assemblies in the present invention cooperate with each other to form a water circulation space for water circulation and heat dissipation in the water pump carrier when in use. The water in the water pump carrier can circulate as a whole in the vertical space in the steel pipe mechanism, the water in the water pump carrier can circulate locally in the space between the steel pipe mechanism, the bearing shaft 7 and the lower thrust assembly, and the water in the water pump carrier can circulate locally in the space between the steel pipe mechanism, the bearing shaft 7 and the upper thrust assembly. The present invention can better dissipate heat by combining local circulation and overall circulation.

[0023] In order to improve the practicality of the present invention, this embodiment has a reserved water storage space between the bottom of the upper bracket 3 and the top of the steel pipe mechanism to prevent the water in the water pump carrier from overflowing during use. Figure 4 As shown, in this embodiment, a third annular groove 31 is opened around the bottom of the existing upper bracket 3, and the space formed between the third annular groove 31 and the top of the steel pipe mechanism is the reserved water storage space. When using this embodiment, the water in the water pump carrier will expand in volume after being heated. At this time, the expanded water can enter the reserved water storage space, which can effectively prevent water from overflowing from the top of the carrier.

[0024] It should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A load-bearing device used in a high-lift submersible pump, comprising a housing and a load-bearing shaft rotatably connected in the housing, characterized in that: The shell includes a steel pipe mechanism, an upper bracket fixed on the top of the steel pipe mechanism and a lower bracket fixed on the bottom of the steel pipe mechanism; a lower thrust assembly with a centering function and at least one upper thrust assembly with a centering function are inserted in sequence from bottom to top on the part of the load-bearing shaft located inside the steel pipe mechanism; a reserved water storage space is provided between the bottom of the upper bracket and the top of the steel pipe mechanism to prevent water in the water pump carrier from overflowing during use; the steel pipe mechanism, the lower thrust assembly and all the upper thrust assemblies cooperate with each other to form a water circulation space for water circulation and heat dissipation in the water pump carrier during use.

2. The carrier used in a high-lift submersible pump according to claim 1, characterized in that: The lower bracket comprises a lower bracket body and a first annular protrusion fixed on the top of the lower bracket body and having a top surface which is an arc surface.

3. The carrier used in a high-lift submersible pump according to claim 2, characterized in that: The lower thrust assembly includes a lower thrust bearing seat inserted on the load-bearing shaft, a lower thrust bearing inserted on the load-bearing shaft and pressed against the lower thrust bearing seat, and a lower thrust plate inserted on the load-bearing shaft and pressed against the lower thrust bearing; the lower thrust bearing seat includes a lower thrust bearing seat body and a first annular groove provided at the bottom of the lower thrust bearing seat body; the first annular protrusion is matched with the first annular groove so that the lower thrust bearing seat can be movably adjusted on the lower bracket to realize the centering function of the lower thrust assembly.

4. The carrier used in a high-lift submersible pump according to claim 3, characterized in that: The upper thrust assembly includes a mounting seat inserted on the load-bearing shaft, an upper thrust bearing seat inserted on the load-bearing shaft, an upper thrust bearing inserted on the load-bearing shaft and pressed against the upper thrust bearing seat, and an upper thrust plate inserted on the load-bearing shaft and pressed against the upper thrust bearing; the mounting seat includes a mounting seat body and a second annular protrusion fixed on the top of the mounting seat body and having a circular arc surface as the top surface; the upper thrust bearing seat includes an upper thrust bearing seat body and a second annular groove provided at the bottom of the upper thrust bearing seat body; the second annular protrusion is adapted to the second annular groove so that the upper thrust bearing seat can flexibly adjust its position on the mounting seat to realize the centering function of the lower thrust assembly.

5. A carrier used in a high-lift submersible pump according to any one of claims 1 to 4, characterized in that: The steel pipe mechanism includes an upper steel pipe and at least one middle steel pipe which are arranged in sequence from top to bottom, wherein the middle steel pipe is inserted at a position between the lower bracket and the upper thrust assembly close to the lower bracket or at a position between two adjacent upper thrust assemblies, and the upper steel pipe is inserted at a position between the upper bracket and the upper thrust assembly close to the upper bracket; the upper bracket and the lower bracket are fixed together by at least two fastening bolt components.

6. The carrier used in a high-lift submersible pump according to claim 5, characterized in that: The bearing shaft and the upper bracket are sealed by a sealing mechanism, which includes a mechanical sealing component, an oil sealing component and a water sealing component arranged in sequence from top to bottom.

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