CN219888287U

CN219888287U - Pump split type multistage submersible pump

Info

Publication number: CN219888287U
Application number: CN202321385418.XU
Authority: CN
Inventors: 成崇才
Original assignee: Individual
Current assignee: Shanghai Hucheng Pump Industry Co ltd
Priority date: 2023-06-01
Filing date: 2023-06-01
Publication date: 2023-10-24
Anticipated expiration: 2033-06-01

Abstract

The utility model discloses a pump split type multi-stage submersible pump, which comprises a base, wherein the base is provided with a plurality of pump units; the pump body is arranged on the base, a hollow pump cavity is formed in the pump body, and a bottom groove is formed in the middle of the bottom end of the pump cavity; the pump shaft is arranged in the middle of the pump cavity, and the top end of the pump shaft is provided with a submersible motor; the upper end of the coupler is connected with a submersible motor, and the lower end of the coupler is connected with a pump shaft; the bearing module comprises an upper bearing and a lower bearing, wherein the upper bearing is arranged on the coupler, and the lower bearing is arranged at the bottom of the pump shaft. According to the utility model, the coupling is arranged, so that the motor and the pump body are assembled separately, the installation of the motor and the pump body is not interfered with each other, and the assembly of the water pump part is not delayed because the motor part is not assembled; the bottom end of the water pump is provided with an independent bearing, the axial force is not born by the bearing of the motor any more, and the service life of the motor can be prolonged.

Description

Pump split type multistage submersible pump

Technical Field

The utility model relates to the technical field of sewage conveying, in particular to a pump split type multi-stage submersible pump.

Background

The multi-stage submersible pump is widely applied to industries such as river water irrigation, coke oven cooling pouring engineering, boiler water supply, municipal sewage discharge, mineral separation conveying, industrial water, tunnel construction, process drainage, mine drainage and the like.

The motor and the water pump of the prior multi-stage submersible electric pump are coaxially connected (shown in the description 2 of the drawings), and the problems and disadvantages of the prior multi-stage submersible electric pump include: 1. the pump is coaxially connected, so that the length-diameter ratio of the shaft is larger, the motor is required to be installed firstly, then the water pump part is installed, and the assembly efficiency is low; 2. the axial force generated by the water pump in the running process can only be borne by the bearing of the motor, the bearing of the motor is easy to damage, and the later maintenance cost is increased; 3. the water pump part is in direct contact with the conveying medium, and is a rotary machine, so that once the shaft of the water pump part is damaged, the whole electric pump is returned to the field for maintenance, and the maintenance cost is high and the maintenance period is long.

Disclosure of Invention

The utility model mainly aims to provide a pump split type multi-stage submersible pump which can effectively solve the problems in the background technology.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a pump split type multi-stage submersible pump comprises a base; the pump body is arranged on the base, a hollow pump cavity is formed in the pump body, and a bottom groove is formed in the middle of the bottom end of the pump cavity; the pump shaft is arranged in the middle of the pump cavity, and the top end of the pump shaft is provided with a submersible motor; the upper end of the coupler is connected with a submersible motor, and the lower end of the coupler is connected with a pump shaft; the bearing module comprises an upper bearing and a lower bearing, wherein the upper bearing is arranged on the coupler, and the lower bearing is arranged at the bottom of the pump shaft.

As a preferable technical scheme, the pump shaft is provided with a plurality of impellers, and an interstage sleeve is arranged between the impellers.

As an optimized technical scheme, a connecting disc is fixed at the upper end of the pump body through bolts, a first balance return pipe and an installation groove are arranged in the connecting disc, a first bearing seat is arranged in the installation groove, and the first bearing seat is used for installing an upper bearing.

As a preferable technical scheme, a second bearing seat is arranged in the bottom groove, and the second bearing seat is used for installing a lower bearing.

As a preferred embodiment, the coupling and the pump shaft are connected by a pin.

As a preferable technical scheme, one side of the pump body is also provided with a second balance water return pipe, and the second balance water return pipe is communicated with the first balance water return pipe.

As a preferred solution, the submersible motor is bolted to the coupling disc.

As an optimized technical scheme, the upper end of the pump shaft is further provided with a balance drum, and a balance ring is sleeved on the outer side of the balance drum.

As a preferred technical solution, the pump shaft, the coupling and the submersible motor are coaxially arranged.

As a preferred technical scheme, the pump cavity is internally coated with a corrosion-resistant coating.

Compared with the prior art, the utility model has the following beneficial effects:

in the present utility model,

1. the motor and the pump are assembled separately through the coupler, so that the motor and the pump are not interfered with each other during the assembly, and the assembly of the water pump part is not delayed because the motor part is not assembled;

2. the bottom end of the water pump is provided with an independent bearing, the axial force is not born by the bearing of the motor any more, and the service life of the motor can be prolonged;

3. when the pump shaft of the water pump part is damaged in the operation process, the pump can be detached from the coupler for independent maintenance, so that the maintenance is more convenient, the maintenance cost is low, and the maintenance period is short.

Drawings

FIG. 1 is a cross-sectional view of the overall structure of a pump split multi-stage submersible pump of the present utility model;

fig. 2 is a cross-sectional view of a conventional multi-stage submersible pump.

In the figure: 1. a base; 2. a pump body; 3. a bottom groove; 4. a pump shaft; 5. a submersible motor; 6. a coupling; 7. an upper bearing; 8. a lower bearing; 9. an impeller; 10. an interstage sleeve; 11. a coupling plate; 12. a first balance return pipe; 13. a mounting groove; 14. a first bearing seat; 15. a second bearing seat; 16. a second balance return pipe; 17. a balancing drum; 18. a balance ring; 19. existing multi-stage submersible pumps.

Detailed Description

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

Referring to the description of the drawings 1, a pump split multi-stage submersible pump comprises a base 1; the pump body 2 is arranged on the base 1, a hollow pump cavity is formed in the pump body 2, and a bottom groove 3 is formed in the middle of the bottom end of the pump cavity; the pump shaft 4 is arranged in the middle of the pump cavity, and the top end of the pump shaft 4 is provided with a submersible motor 5; the upper end of the coupler 6 is connected with a submersible motor 5, and the lower end of the coupler 6 is connected with a pump shaft 4; the bearing module comprises an upper bearing 7 and a lower bearing 8, wherein the upper bearing 7 is arranged on the coupler 6, and the lower bearing 8 is arranged at the bottom of the pump shaft 4.

Further, the pump shaft 4 is provided with a plurality of impellers 9, an interstage sleeve 10 is arranged between the impellers 9, through the arrangement, the interstage sleeve 10 rotates fluid, a proper flow field is formed between different blades, the efficiency of the pump is improved, and the interstage sleeve 10 can adjust the speed and the pressure of the fluid to enable the fluid to reach an optimal state and enter the next impeller 9, so that the fluid is prevented from stalling or losing control; the vortex and turbulence generated by the inertia effect of the fluid are effectively reduced, and the vibration and noise of the pump are reduced; the reliability and the service life of the pump are improved, and dynamic load and abrasion are reduced.

Specifically, the upper end bolt of the pump body 2 is fixed with a connecting disc 11, a first balance return pipe 12 and a mounting groove 13 are arranged in the connecting disc 11, a first bearing seat 14 is arranged in the mounting groove 13, the first bearing seat 14 is used for mounting the upper bearing 7, the connecting disc 11 is an important part for connecting the pump body 2 and a motor, and the function of the connecting disc is to transmit the rotation of the motor to the pump body 2, so that the pump body 2 can generate flow and provide liquid conveying capacity. The structure of the submersible pump comprises two steel plates and bolts for connecting the plates, wherein holes aligned with an inlet and an outlet are formed in the connecting plates, the submersible pump and the motor are connected together, meanwhile, the connecting disc 11 can also play a role in increasing the durability and reliability of the submersible pump, and the submersible pump normally works in an underwater environment, and water can corrode the motor, so that the connecting disc 11 is designed into steel materials to improve corrosion resistance, and polishing treatment is arranged on the surface of the connecting disc to reduce friction loss between the connecting disc 11 and the motor and reduce vibration noise. Besides, the coupling disc 11 also contributes to adjusting the concentricity of the pump body 2 and the motor so that both are kept in a balanced state during operation, avoiding vibrations and noise due to unbalance.

In this embodiment, a second bearing 15 is disposed in the bottom groove 3, and the second bearing 15 is used for mounting the lower bearing 8. By this arrangement, the outer ring of the fixed lower bearing 8 supporting the bearing is rotated only by the inner ring, and the outer ring is kept stationary, always in conformity with the direction of transmission (motor running direction), and kept balanced at all times.

Further, through the pin connection, accurate location and connection can be realized through the pin connection between shaft coupling 6 and the pump shaft 4, simultaneously, the pin connection can also conveniently dismantle and install, can save maintenance time and cost.

Specifically, a second balance water return pipe 16 is further arranged on one side of the pump body 2, the second balance water return pipe 16 is communicated with the first balance water return pipe 12, and through the arrangement, the sectional area of the water return pipe is adjusted, so that the pressure drop on the water return pipe is equal to the pressure drop on the water inlet pipe, the water flow in each branch is equal, and the water flow balance in the whole water pump is maintained.

In this embodiment, the submersible motor 5 is bolted to the coupling plate 11, by which arrangement the equipment is facilitated to be overhauled.

Further, the upper end of the pump shaft is also provided with a balance drum 17, and a balance ring 18 is sleeved on the outer side of the balance drum 17. The balancing drum 17 is located at the rear end of the final stage impeller 9 and is secured on the shaft by means of a key or screw, the front of which is the rear pumping chamber of the final stage impeller 9 and the rear of which is the balancing chamber in communication with the suction inlet, acting to create a balancing force directed to the right which serves to balance the axial force acting on the rotor. Most of the axial force can be balanced by the choice of the diameter of the balancing drum 17.

Specifically, the balance ring 18 is installed on the outer side of the balance drum 17 and rotates together with the shaft, and the function of the balance ring is that during the operation process of the pump, the automatic adjusting mechanism enables as little axial force as possible to have negative influence on the system through the impeller 9 while detecting the deviation of the axial force, so that the influence of the axial force on the conveying system is reduced, and the effects of reducing vibration and abrasion are achieved.

In this embodiment, the pump shaft 4, the coupling 6 and the submersible motor 5 are coaxially arranged.

Specifically, the pump cavity is coated with an anti-corrosion coating, and as the multi-stage submersible pump is often used for conveying corrosive liquids such as strong acid, strong alkali, salts and the like containing chemical substances, the multi-stage submersible pump needs to be subjected to anti-corrosion coating treatment so as to ensure the service life and the safety of the pump. The choice of the anti-corrosion coating needs to be considered according to specific conveying media and operation environments, and polytetrafluoroethylene materials are adopted as the anti-corrosion coating in the embodiment so as to improve the anti-corrosion effect of the pump body 2.

In the multi-stage submersible pump, the total lift of the liquid is sequentially improved through the synergistic effect of the impellers 9, so that long-distance conveying is realized until the liquid is output from an outlet, the whole conveying process is finished, the motor and the pump are separately assembled through the coupler 6, the assembly of the water pump part is not delayed because the motor part is not assembled, the bottom end of the water pump is provided with a separate bearing, the axial force is not born by the bearing of the motor any more, the service life of the motor is prolonged, the pump can be detached from the coupler 6 for separate maintenance when the pump shaft 4 of the water pump part is damaged in the operation process, the maintenance is more convenient, the maintenance cost is low, and the maintenance period is greatly shortened.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A pump split multi-stage submersible pump, comprising:

a base (1);

the pump body (2) is arranged on the base (1), a hollow pump cavity is formed in the pump body (2), and a bottom groove (3) is formed in the middle of the bottom end of the pump cavity;

the pump shaft (4) is arranged in the middle of the pump cavity, and a submersible motor (5) is arranged at the top end of the pump shaft (4);

the motor is characterized by comprising a shaft coupling (6), wherein the upper end of the shaft coupling (6) is connected with a submersible motor (5), and the lower end of the shaft coupling (6) is connected with a pump shaft (4);

the bearing module comprises an upper bearing (7) and a lower bearing (8), wherein the upper bearing (7) is arranged on the coupler (6), and the lower bearing (8) is arranged at the bottom of the pump shaft (4).

2. The pump split multi-stage submersible pump of claim 1, wherein: the pump shaft (4) is provided with a plurality of impellers (9), and an interstage sleeve (10) is arranged between the impellers (9).

3. A pump split multi-stage submersible pump according to claim 2, wherein: the novel water pump is characterized in that a connecting disc (11) is fixed at the upper end of the pump body (2) through bolts, a first balance water return pipe (12) and an installation groove (13) are arranged in the connecting disc (11), a first bearing seat (14) is arranged in the installation groove (13), and the first bearing seat (14) is used for installing an upper bearing (7).

4. A pump split multi-stage submersible pump according to claim 3, wherein: a second bearing seat (15) is arranged in the bottom groove (3), and the second bearing seat (15) is used for installing a lower bearing (8).

5. The pump split multi-stage submersible pump of claim 4, wherein: the coupling (6) is connected with the pump shaft (4) through a pin.

6. The pump split multi-stage submersible pump of claim 5, wherein: and a second balance water return pipe (16) is further arranged on one side of the pump body (2), and the second balance water return pipe (16) is communicated with the first balance water return pipe (12).

7. The pump split multi-stage submersible pump of claim 6, wherein: the submersible motor (5) is fixed on the connecting disc (11) through bolts.

8. The pump split multi-stage submersible pump of claim 7, wherein: the pump shaft upper end is also provided with a balance drum (17), and a balance ring (18) is sleeved on the outer side of the balance drum (17).

9. The pump split multi-stage submersible pump of claim 8, wherein: the pump shaft (4), the coupler (6) and the submersible motor (5) are coaxially arranged.

10. The pump split multi-stage submersible pump of claim 9, wherein: the pump cavity is internally coated with an anti-corrosion coating.