CN216306233U

CN216306233U - Horizontal permanent magnet end suction centrifugal pump

Info

Publication number: CN216306233U
Application number: CN202122902116.2U
Authority: CN
Inventors: 詹战友; 李恝
Original assignee: Hefei Shuanghe Intelligent Technology Co ltd
Current assignee: Hefei Shuanghe Intelligent Technology Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-04-15
Anticipated expiration: 2031-11-24

Abstract

The utility model discloses a horizontal permanent magnet end suction centrifugal pump which comprises a pump end assembly, a coupling assembly, a high-efficiency permanent magnet synchronous motor and a base, wherein the turbine assembly is provided with a turbine, the turbine is die-cast by copper alloy and provided with 7 blades and a wrap angle of 128 degrees, and a volute chamber flow passage of the turbine is subjected to a fluid polishing technology. The pump end assembly is in transmission connection with the permanent magnet synchronous motor through the coupling assembly; the pump end subassembly includes vortex chamber subassembly and the suspension subassembly of coaxial setting, the suspension subassembly includes bearing body subassembly, pump cover subassembly, turbine subassembly and turbine nut for it is smooth and smooth to overflow, through fluid calculation and structural analysis, makes the pump head structure streamlined, and whole rigidity and intensity are more economical reasonable. The efficiency is improved by 11 percent, and the noise influence is effectively reduced; meanwhile, the performance is enabled to obtain integral leap by matching with a high-efficiency permanent magnet synchronous motor.

Description

Horizontal permanent magnet end suction centrifugal pump

Technical Field

The utility model relates to the field of centrifugal pumps, in particular to a horizontal permanent magnet end-suction centrifugal pump.

Background

The end suction centrifugal pump is one of centrifugal pumps, a back suction structure is adopted, an impeller can be installed and replaced without dismantling a pump shell, and dislocation and deformation of a water pipe can be reduced to the maximum extent by a firm structure of a main shaft and a bearing.

The back-drawing structure convenient to maintain can conveniently take out the rotating part for maintenance without disassembling the inlet and outlet pipelines of the system. The top is a central line outlet, the pump shell is supported by a bottom foot, and the dislocation and deformation caused by pipeline load can be resisted to the maximum extent.

However, in the end suction centrifugal pump in the prior art, due to the fact that the pump blades and the bearing seat are unreasonable in design and poor in lubricating effect, the problems of high loss, low efficiency, high vibration and noise and the like exist, and the technical problem generally exists in the market at present.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide a horizontal permanent magnet end-suction centrifugal pump, so that the efficiency is improved, and the noise influence is effectively reduced.

Therefore, the utility model provides a horizontal permanent magnet end suction centrifugal pump which comprises a pump end assembly, a coupling assembly, a high-efficiency permanent magnet synchronous motor and a base, wherein the pump end assembly and the permanent magnet synchronous motor are in transmission connection through the coupling assembly; the pump end assembly comprises a volute chamber assembly and a suspension assembly which are coaxially arranged, the suspension assembly comprises a bearing body assembly, a pump cover assembly, a turbine assembly and a turbine nut, the bearing body assembly and the pump cover assembly are in sealing connection through bolts and sealing rings, the turbine assembly is arranged on the outer side of the pump cover assembly and is connected with a main shaft in the bearing body assembly through the turbine nut; the bearing body assembly further comprises a bearing body, an oil hole cover, a bearing cover, a water discharging pipe plug, an oil discharging pipe plug and an oil cup; the turbine assembly is provided with a turbine, the turbine is die-cast by copper alloy, has 7 blades and a wrap angle of 128 degrees, and a volute chamber flow passage of the turbine adopts a fluid grinding technology.

Further, the main shaft is arranged in the bearing body, the bearing body is rotatably connected with one end of the main shaft through a first framework oil seal, a check ring and a first bearing, and the other end of the main shaft is rotatably connected with the bearing body through a second bearing.

Further, the outer side of the second bearing is provided with a bearing cover, the bearing cover is connected to the bearing body through a bolt, and the bearing cover is rotatably connected with the main shaft through a second framework oil seal.

Furthermore, a water retaining ring is arranged on the outer side of the bearing cover.

Furthermore, the oil cup is arranged in the middle of the main shaft and is positioned in the lubricating oil cavity of the bearing body, so that the lubricating oil level in the bearing body is kept constant.

Further, the oil hole cover is arranged at the upper end of the bearing body and communicated with the lubricating oil cavity on the left side of the bearing body.

Furthermore, the oil unloading pipe plug is arranged at the lower end of the bearing body and communicated with the lubricating oil cavity on the left side of the bearing body.

Furthermore, the bearing body is provided with a square boss at the tail part.

The horizontal permanent magnet end suction centrifugal pump provided by the utility model adopts a brand-new design for the fluid part, the turbine of the horizontal permanent magnet end suction centrifugal pump is die-cast by copper alloy, the number of blades and wrap angles are changed, the number of the blades of the horizontal permanent magnet end suction centrifugal pump is 7, and the wrap angle is 128 degrees; and the volute chamber runner all adopts the fluid technique of polishing for flow through more smooth and smooth-going, through fluid calculation and structural analysis, make the pump head structure streamlined, and whole rigidity and intensity are more economical reasonable. The efficiency is improved by 11 percent, and the noise influence is effectively reduced; meanwhile, the performance is enabled to obtain integral leap by matching with a high-efficiency permanent magnet synchronous motor.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic structural diagram of a horizontal permanent magnet end-suction centrifugal pump according to the present invention;

FIG. 2 is a schematic structural diagram of a pump end assembly in the horizontal permanent magnet end-suction centrifugal pump of the present invention;

FIG. 3 is a schematic structural diagram of a suspension assembly of the horizontal permanent magnet end-suction centrifugal pump of the present invention;

FIG. 4 is a schematic structural diagram of a bearing body assembly in the horizontal permanent magnet end-suction centrifugal pump of the present invention;

FIG. 5 is a front view of a turbine assembly in the horizontal permanent magnet end-suction centrifugal pump of the present invention;

FIG. 6 is a cross-sectional view of a turbine assembly in the horizontal permanent magnet end-suction centrifugal pump of the present invention;

FIG. 7 is a graph showing the profile of a turbine nut in the horizontal permanent magnet end-suction centrifugal pump according to the present invention;

fig. 8 is a schematic structural diagram of a turbine nut in the horizontal permanent magnet end-suction centrifugal pump of the utility model.

Description of the reference numerals

1. A pump end assembly; 2. a coupling assembly; 3. a permanent magnet synchronous motor; 4. a base; 5. a suspension assembly; 6. a vortex chamber assembly; 7. a bearing body assembly; 8. a pump cover assembly; 9. a turbine assembly; 10. a turbine nut; 11. a main shaft; 12. framework oil seal I; 13. a retainer ring; 14. a first bearing; 15. a bearing body; 16. an oil hole cover; 17. a second bearing; 18. a bearing cap; 19. a framework oil seal II; 20. a water discharge pipe plug; 21. a water retaining ring; 22. a flat bond; 23. unloading the oil pipe plug; 24. an oil cup; 25. and (4) a square boss.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 8, the horizontal permanent magnet end suction centrifugal pump of the utility model is composed of a pump end assembly 1, a coupling assembly 2, a high-efficiency permanent magnet synchronous motor 3 and a base 4; pump end subassembly 1 and PMSM 3 are fixed respectively in base 4 upside, and both carry out the transmission through shaft coupling subassembly 2 and connect. The permanent magnet motor is adopted for driving, and meanwhile, the newly designed high-efficiency turbine is combined, so that the working efficiency of the whole machine is relatively optimized, and great help is brought to the energy-saving field and the new and old replacement.

As shown in fig. 2 and 3, the pump end assembly 1 includes a volute chamber assembly 6, a suspension assembly 5 and a bracket; vortex chamber subassembly 6 bottom is connected with base 4, and suspension subassembly 5 passes through the support to be connected with base 4, makes vortex chamber subassembly 6 coaxial with suspension subassembly 5 to be located outside 5 one ends of suspension subassembly, both carry out sealing connection through bolt, sealing washer, form the pump body.

As shown in fig. 3, the suspension assembly 5 includes a bearing body assembly 7, a pump cover assembly 8, a turbine assembly 9 and a turbine nut 10, the bearing body assembly 7 and the pump cover assembly 8 are in clearance fit with each other by H7/H6, and are connected in a sealing manner by bolts and sealing rings, the turbine assembly 9 is arranged on the outer side of the pump cover assembly 8, and is connected with a transmission main shaft 11 in the bearing body assembly 7 by the turbine nut 10.

As shown in fig. 5 and 6, the turbine assembly 9 has a turbine, the turbine adopts a brand-new design, the turbine is die-cast by using copper alloy, the number of blades and a wrap angle of the turbine are changed, the number of blades of the turbine is 7, and the wrap angle is 128 degrees; the vortex chamber flow passages are all polished by fluid, so that the overflowing is smoother and smoother; the efficiency is improved by 11%, and the noise influence is effectively reduced.

According to the potential flow law of hydrodynamics and the flow field superposition principle, the outer molded line of the turbine nut 10 is superposed by adopting horizontal uniform linear flow and source flow to obtain the equation of the outer molded line: u0 xrsin theta + Q/2 pi is Q/2, wherein, u0 vortex chamber inlet flow speed, r is set polar coordinate radius, theta is polar coordinate angular displacement, Q is set flow, and the size is set from y to Q/4u0 to inlet end width. The outer mold line coordinate of the turbine nut obtained by calculation is shown in fig. 7, and the cross-sectional shape of the turbine nut 10 is formed (shown in fig. 8).

Specifically, as shown in fig. 4, the bearing body assembly 7 includes a main shaft 11, a first skeleton oil seal 12, a retainer ring 13, a first bearing 14, a bearing body 15, an oil hole cover 16, a second bearing 17, a bearing cover 18, a second skeleton oil seal 19, a drain plug 20, a water retaining ring 21, a flat key 22, an oil drain plug 23, an oil cup 24, and a square boss 25.

The spindle 11 is arranged in the bearing body 15, one end of the spindle 11 is rotatably connected with the bearing body 15 through a first skeleton oil seal 12, a retainer ring 13 and a first bearing 14, the other end of the spindle 11 is rotatably connected with the bearing body 15 through a second bearing 17, a bearing cover 18 is arranged on the outer side of the second bearing 17, the bearing cover 18 is connected onto the bearing body 15 through a bolt, the bearing cover 18 is rotatably connected with the spindle through a second skeleton oil seal 19, and a water retaining ring 21 is arranged on the outer side of the bearing cover 18.

The bearing body 15 is provided with a left cavity and a right cavity, one side close to the input end of the main shaft 11 is a lubricating oil cavity, the other side is a vortex cavity, and the upper part of the lubricating oil cavity is provided with an oil hole cover 16 communicated with the outside for adding lubricating oil; the lower part of the lubricating oil chamber is provided with an oil drain plug 23 communicated with the outside for discharging debris and waste lubricating oil. The part of the main shaft 11 located in the lubricant chamber is provided with an oil cup 24, which functions to keep the level of lubricant in the bearing housing constant. The lower end of the cavity where the vortex chamber is located is provided with a water discharge pipe plug 20 for discharging debris and sewage.

Wherein, as shown in fig. 4, the bearing body 15 is provided with a square boss 25 at the tail, and when the pump end assembly 1 is connected with the coupling assembly 2, a novel coupling cover is conveniently installed on the square boss 25.

The working principle and the working process of the horizontal permanent magnet end-suction centrifugal pump are briefly described below with reference to the attached drawings.

The utility model of the technology is that the centrifugal turbine is replaced, the fluid part adopts a brand new design, the turbine adopts copper alloy die casting, the number of the blades and the wrap angle are changed, the number of the blades of the pump is 7, and the wrap angle is 128 degrees; and the vortex chamber flow channel adopts a fluid polishing technology, so that the overflowing is smoother and smoother. The latest computational fluid mechanics and finite element method are adopted, so that the efficiency of the water pump is improved to 78%; meanwhile, vibration and noise are effectively reduced, so that the pump is a perfect choice in occasions with high requirements on energy conservation and silence.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A horizontal permanent magnet end suction centrifugal pump is characterized by comprising a pump end assembly (1), a coupler assembly (2), a high-efficiency permanent magnet synchronous motor (3) and a base (4), wherein the pump end assembly (1) and the permanent magnet synchronous motor (3) are in transmission connection through the coupler assembly (2);

the pump end assembly (1) comprises a volute chamber assembly (6) and a suspension assembly (5) which are coaxially arranged, the suspension assembly (5) comprises a bearing body assembly (7), a pump cover assembly (8), a turbine assembly (9) and a turbine nut (10), the bearing body assembly (7) is in sealing connection with the pump cover assembly (8) through bolts and sealing rings, the turbine assembly (9) is arranged on the outer side of the pump cover assembly (8) and is connected with a main shaft (11) in the bearing body assembly (7) through the turbine nut (10); the bearing body assembly (7) further comprises a bearing body (15), an oil hole cover (16), a bearing cover (18), a water drain pipe plug (20), an oil drain pipe plug (23) and an oil cup (24);

the turbine assembly (9) is provided with a turbine, the turbine is die-cast by copper alloy, has 7 blades and a wrap angle of 128 degrees, and the volute flow passages of the turbine are all manufactured by adopting a fluid grinding technology.

2. The horizontal permanent-magnet end-suction centrifugal pump according to claim 1, wherein the main shaft (11) is arranged in the bearing body (15), the bearing body (15) is rotatably connected with one end of the main shaft (11) through a first skeleton oil seal (12), a retaining ring (13) and a first bearing (14), and the other end of the main shaft (11) is rotatably connected with the bearing body (15) through a second bearing (17).

3. The horizontal permanent-magnet end-suction centrifugal pump according to claim 2, wherein a bearing cover (18) is arranged on the outer side of the second bearing (17), the bearing cover (18) is connected to the bearing body (15) through a bolt, and the bearing cover (18) is rotatably connected with the main shaft (11) through a second framework oil seal (19).

4. The horizontal permanent magnetic end suction centrifugal pump according to claim 3, wherein a water retaining ring (21) is further arranged on the outer side of the bearing cover (18).

5. The horizontal permanent-magnet end-suction centrifugal pump according to claim 1, wherein the oil cup (24) is disposed in the middle of the main shaft (11) and is located in a lubricating oil chamber of the bearing body (15) to keep the lubricating oil level in the bearing body (15) constant.

6. The horizontal permanent-magnet end-suction centrifugal pump according to claim 1, wherein the oil hole cover (16) is disposed at the upper end of the bearing body (15), and the oil hole cover (16) is communicated with the lubricating oil chamber on the left side of the bearing body (15).

7. The horizontal permanent-magnet end-suction centrifugal pump according to claim 1, wherein the oil-discharging pipe plug (23) is arranged at the lower end of the bearing body (15), and the oil-discharging pipe plug (23) is communicated with a lubricating oil chamber on the left side of the bearing body (15).

8. The horizontal permanent-magnet end-suction centrifugal pump according to claim 1, wherein the bearing body (15) is provided with a square boss (25) at the tail.