CN212225601U

CN212225601U - High-efficiency energy-saving centrifugal pump

Info

Publication number: CN212225601U
Application number: CN202020961615.1U
Authority: CN
Inventors: 王庆; 左玉花; 王中升; 闫晓旭; 史利山
Original assignee: SHANDONG CHANGZHI PUMP CO Ltd
Current assignee: SHANDONG CHANGZHI PUMP CO Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2020-12-25
Anticipated expiration: 2030-05-29

Abstract

The utility model belongs to the field of pumps, in particular to a high-efficiency energy-saving centrifugal pump, which comprises a pump shell, an impeller and a pump shaft; a water suction chamber and a water pressing chamber are arranged in the pump shell; the impeller is a double-suction impeller, is positioned in the water pumping chamber, is fastened on the pump shaft and is communicated with the water suction chamber and the water pumping chamber; both ends of the impeller are assembled with the inner wall of the pump body port ring through the impeller port ring, and the periphery of the pump body port ring is hermetically assembled with the inner wall of the pump shell; the water suction chamber adopts a semi-spiral water suction chamber, and two flow distribution plates are symmetrically arranged in the water suction chamber. The centrifugal pump adopts the semi-spiral water suction chamber and is provided with the two flow dividing plates in the water suction chamber, so that on one hand, the rotation of fluid in the water suction chamber can be weakened, namely, the turbulent flow phenomenon of the fluid in the water suction chamber is weakened, the vibration of a pump body is reduced, the working noise of the pump is reduced, on the other hand, the flow of the fluid entering the impeller can be kept stable, the energy loss generated when the impeller rotates is reduced, the effects of energy conservation and consumption reduction are achieved, the efficiency of the impeller is improved, and the normal work of the pump is ensured.

Description

High-efficiency energy-saving centrifugal pump

Technical Field

The utility model relates to a high-efficient energy-saving centrifugal pump belongs to pump technical field.

Background

In the traditional centrifugal pump, fluid gets into from the pump import of the pump body, get into the impeller behind the room runner that absorbs water of flowing through, but the room that absorbs water adopts annular or helix type structure usually, can produce the random flow phenomenon when the fluid flow passes through the room that absorbs water, this kind of random flow phenomenon can lead to the pump body to produce certain vibration, and increase the operating noise of pump, the fluid flow who gets into the impeller simultaneously is very unstable, can produce great energy loss when the impeller is rotatory, consequently, the work efficiency of impeller has been reduced, and then the normal work of influence pump.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the defects in the prior art are overcome, the high-efficiency energy-saving centrifugal pump which can keep the flow of fluid entering the impeller stable, save energy, reduce consumption and improve the efficiency of the impeller is provided, the whole pump body is small in vibration and low in noise, and the normal work of the pump is ensured.

The high-efficiency energy-saving centrifugal pump comprises a pump shell, an impeller and a pump shaft; a water suction chamber and a water pressing chamber are arranged in the pump shell; the impeller is a double-suction impeller, is positioned in the water pumping chamber, is fastened on the pump shaft and is communicated with the water suction chamber and the water pumping chamber; both ends of the impeller are assembled with the inner wall of the pump body port ring through the impeller port ring, and the periphery of the pump body port ring is hermetically assembled with the inner wall of the pump shell; the water suction chamber adopts a semi-spiral water suction chamber, and two flow distribution plates are symmetrically arranged in the water suction chamber.

The water suction chamber in the centrifugal pump is not a traditional ring or a spiral line, but a semi-spiral water suction chamber, and two flow distribution plates are arranged in the water suction chamber, so that on one hand, the rotation of fluid in the water suction chamber can be weakened, namely, the turbulent flow phenomenon of the fluid in the water suction chamber is weakened, the vibration of the pump body is reduced, the working noise of the pump is reduced, on the other hand, the flow of the fluid entering the impeller can be kept stable, thereby reducing the energy loss generated when the impeller rotates, namely, the energy-saving and consumption-reducing effects are achieved, the efficient and energy-saving centrifugal pump with the improved impeller efficiency is realized, and the normal work of the.

Preferably, the radial cross-section of runner of pumping chamber is oval, and the radial cross-section of runner of traditional pumping chamber is circular, the pumping chamber makes the radial cross-section of runner of pumping chamber be oval through shortening axial distance, and this structural style's pumping chamber has little axial distance, can guarantee the efficiency of pump and the stability of pump operation.

Preferably, the blades of the impeller are twisted blades. Further preferably, the twist angle of the twisted blade is 28 degrees, the wrap angle is smaller than 120 degrees, and the overlap angle is 46 degrees, so that the cavitation of the impeller can be reduced, the efficiency of the impeller can be improved, and the lift and the hydraulic performance of the pump can be improved.

Preferably, the back of the blade outlet of the impeller is provided with a V-shaped groove, so that the front and rear flow lines of the impeller cover plate can be ensured, the hydraulic performance is higher than that of the conventional impeller blade, and the performance curve is gentle.

Preferably, two sealing grooves are formed in the periphery of the mouth ring along the annular direction, and sealing rings are installed in the sealing grooves. The sealing between the mouth ring and the inner wall of the pump shell is of a double-sealing structure, a good sealing effect can be guaranteed through the double-sealing structure, meanwhile, the anti-deflection inclined effect is achieved, pressure scouring of fluid to the impeller and deflection friction caused by the pressure scouring are eliminated, and the service life of the mouth ring is prolonged.

Compared with the prior art, the utility model beneficial effect who has is:

this centrifugal pump adopts half-spiral type suction chamber and sets up two flow distribution plates at the indoor symmetry that absorbs water, can weaken the fluid rotation in the suction chamber on the one hand, weaken the turbulent flow phenomenon of fluid in the suction chamber promptly, reduced the vibration of the pump body, reduced the operating noise of pump, on the other hand can make the fluid flow who gets into the impeller remain stable to produced energy loss when reducing the impeller rotation plays energy saving and consumption reduction's effect promptly, improve the energy-efficient centrifugal pump of impeller efficiency, ensure the normal work of pump.

Drawings

Fig. 1 is a front view of the present invention;

FIG. 2 is a top view of FIG. 1;

fig. 3 is a cross-sectional view of the present invention;

FIG. 4 is a partial enlarged view of portion I of FIG. 3;

fig. 5 is a schematic structural diagram of the impeller of the present invention.

In the figure: 1. a pump inlet; 2. a water suction chamber; 3. a water pumping chamber; 4. an outlet of the pump; 5. a flow distribution plate; 6. a pump shaft; 7. a pump housing; 8. an impeller; 9. a pump body orifice ring; 10. a seal ring; 11. a V-shaped groove; 12. an impeller eye.

Detailed Description

Embodiments of the present invention are further described below with reference to the accompanying drawings:

example (b):

as shown in FIGS. 1-4, the high-efficiency energy-saving centrifugal pump comprises a pump shell 7, an impeller 8 and a pump shaft 6; a water suction chamber 2 and a water pressing chamber 3 are arranged in the pump shell 7; the impeller 8 is a double-suction impeller 8, is positioned in the pumping chamber 3 and fastened on the pump shaft 6, and is communicated with the water suction chamber 2 and the pumping chamber 3; both ends of the impeller 8 are assembled with the inner wall of the pump body port ring 9 through an impeller port ring 12, and the periphery of the pump body port ring 9 is hermetically assembled with the inner wall of the pump shell 7; the water suction chamber 2 adopts a semi-spiral water suction chamber 2; two flow dividing plates 5 are symmetrically arranged in the water suction chamber 2 and used for stabilizing the flow.

The working principle and process of the embodiment are as follows:

fluid enters from a pump inlet 1 of the pump body, flows through a flow passage of the water suction chamber 2 and then enters the impeller 8, the pressure of the fluid is increased rapidly after the impeller 8 works, the fluid flows into the water pressing chamber 3, and the fluid is output from a pump outlet 4 after passing through the water pressing chamber 3.

In this embodiment, the semi-spiral water suction chamber 2 is adopted and the two flow dividing plates 5 are arranged in the water suction chamber 2, so that on one hand, the rotation of fluid in the water suction chamber 2 can be weakened, namely, the turbulent flow phenomenon of the fluid in the water suction chamber 2 is weakened, the vibration of the pump body is reduced, the working noise of the pump is reduced, on the other hand, the flow of the fluid entering the impeller 8 can be kept stable, the energy loss generated when the impeller 8 rotates is reduced, namely, the effects of energy conservation and consumption reduction are achieved, the efficient energy-saving centrifugal pump with the efficiency of the impeller 8 is improved, and the normal operation of the.

In this embodiment:

the radial cross section of the flow channel of the pumping chamber 3 is oval, the radial cross section of the flow channel of the traditional pumping chamber is round, the pumping chamber 3 enables the radial cross section of the flow channel of the pumping chamber 3 to be oval by shortening the axial distance, the pumping chamber 3 in the structural form has a small axial distance, and the efficiency of the pump and the stability of the operation of the pump can be guaranteed.

The blades of the impeller 8 are twisted blades, the twisting angle is 28 degrees, the wrap angle is smaller than 120 degrees, the overlapping angle is 46 degrees, the cavitation of the impeller can be reduced through the design, the efficiency of the impeller is improved, and the lift and the hydraulic performance of the pump are further improved.

The back of the blade outlet of the impeller 8 is provided with a V-shaped groove 11 (as shown in figure 5), which can ensure the front and back streamline of the impeller cover plate, and the hydraulic performance is higher than that of the blade of the conventional impeller 8, and the performance curve is gentle.

Two sealing grooves are arranged on the periphery of the pump body opening ring 9 along the ring direction, and sealing rings 10 are arranged in the sealing grooves. The seal between the pump body mouth ring 9 and the inner wall of the pump shell 7 is of a double-seal structure, a good sealing effect can be guaranteed through the double-seal structure, meanwhile, the double-seal structure also has an anti-deflection inclination effect, the pressure scouring of fluid to the impeller 8 and the deflection friction caused by the pressure scouring are eliminated, and the service life of the pump body mouth ring 9 is prolonged.

Claims

1. An efficient energy-saving centrifugal pump comprises a pump shell (7), an impeller (8) and a pump shaft (6); a water suction chamber (2) and a water pressing chamber (3) are arranged in the pump shell (7); the impeller (8) adopts a double-suction impeller (8), is positioned in the pumping chamber (3) and fastened on the pump shaft (6), and is communicated with the water suction chamber (2) and the pumping chamber (3); both ends of the impeller (8) are assembled with the inner wall of the pump body opening ring (9) through the impeller opening ring (12), and the periphery of the pump body opening ring (9) is assembled with the inner wall of the pump shell (7) in a sealing way; the method is characterized in that: the water suction chamber (2) adopts a semi-spiral water suction chamber (2), and two flow distribution plates (5) are symmetrically arranged in the water suction chamber (2).

2. The high efficiency and energy saving centrifugal pump of claim 1, wherein: the radial section of the flow passage of the water pumping chamber (3) is elliptical.

3. The high efficiency and energy saving centrifugal pump of claim 1, wherein: the blades of the impeller (8) adopt twisted blades.

4. The high efficiency and energy saving centrifugal pump of claim 3, wherein: the twisted blades have a twist angle of 28 deg., a wrap angle of less than 120 deg., and an overlap angle of 46 deg..

5. The high efficiency and energy saving centrifugal pump of claim 1, 3 or 4, wherein: the back of the blade outlet of the impeller (8) is provided with a V-shaped groove (11).

6. The high efficiency and energy saving centrifugal pump of claim 1, wherein: two sealing grooves are arranged on the periphery of the pump body opening ring (9) along the ring direction, and sealing rings (10) are arranged in the sealing grooves.