CN219492667U

CN219492667U - Energy-saving centrifugal sewage pump

Info

Publication number: CN219492667U
Application number: CN202320360620.0U
Authority: CN
Inventors: 沈振华; 方玉建
Original assignee: Wenling Institute Of Product Quality Inspection Wenling Institute Of Metrological Verification; Taizhou Vocational College of Science and Technology
Current assignee: Wenling Institute Of Product Quality Inspection Wenling Institute Of Metrological Verification; Taizhou Vocational College of Science and Technology
Priority date: 2023-03-02
Filing date: 2023-03-02
Publication date: 2023-08-08
Anticipated expiration: 2033-03-02

Abstract

The utility model discloses an energy-saving centrifugal sewage pump, which comprises a volute and an impeller, wherein the impeller is arranged in an impeller cavity formed by the volute, the impeller is a centrifugal impeller, the impeller comprises a front disc (1), a rear disc (2) and blades (3), a plurality of blades are distributed along the circumferential direction and are connected between the front disc and the rear disc, the blades comprise first blades (31) and second blades (32), the first blades and the second blades are alternately arranged at intervals along the circumferential direction, and the lengths of the first blades and the second blades are different; the method is characterized in that: the length of the first blade (31) is greater than the length of the second blade (32), and the thickness H2 of the first blade is greater than the thickness H1 of the second blade. The utility model can reduce turbulence in the impeller flow channel and hydraulic flow loss, thereby improving the energy efficiency of the centrifugal sewage pump, and having the effects of saving energy and improving efficiency.

Description

Energy-saving centrifugal sewage pump

Technical Field

The utility model relates to the technical field of liquid pumps, in particular to an energy-saving centrifugal sewage pump.

Background

As shown in fig. 1, the conventional centrifugal sewage pump comprises a volute and an impeller, wherein the impeller is arranged in an impeller cavity formed by the volute, the impeller is a centrifugal impeller, the impeller comprises a front disc 1, a rear disc 2 and blades 3, a plurality of blades are distributed along the circumferential direction and connected between the front disc and the rear disc, the blades 3 comprise first blades and second blades, the first blades and the second blades are alternately arranged at intervals along the circumferential direction, and the lengths of the first blades and the second blades are different. However, the existing centrifugal sewage pump still has the problems of larger turbulence and larger hydraulic flow loss in the impeller flow channel.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide an energy-saving centrifugal sewage pump, which can reduce turbulence in an impeller runner and hydraulic flow loss through the design of a first blade and a second blade, so that the energy efficiency of the centrifugal sewage pump can be improved, and the energy-saving centrifugal sewage pump has the effects of saving energy and improving efficiency.

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

the energy-saving centrifugal sewage pump comprises a volute and an impeller, wherein the impeller is arranged in an impeller cavity formed by the volute, the impeller is a centrifugal impeller, the impeller comprises a front disc (1), a rear disc (2) and blades (3), a plurality of blades are distributed along the circumferential direction and are connected between the front disc and the rear disc, the blades (3) comprise first blades (31) and second blades (32), the first blades and the second blades are alternately arranged at intervals along the circumferential direction, and the lengths of the first blades and the second blades are different; the method is characterized in that: the length of the first blade (31) is greater than the length of the second blade (32), and the thickness (H2) of the first blade is greater than the thickness (H1) of the second blade (32).

Further, the first blade (31) comprises a first blade body (33) and a second blade body (34), the first blade body has a thickness H2, and the second blade body has a thickness H1; thickness h1= (0.4-0.7) H2.

Further, one side blade surface of the first blade (31) is a smooth arc surface, and the other side blade surface adjacent to the second blade (32) is a stepped blade surface.

Further, the second blades (32) divide the impeller flow channel between two adjacent first blades (31) unevenly along the circumferential direction, and an included angle a=8-23 degrees between the chord line of each first blade and the chord line of the adjacent second blade, and an included angle b=62-80 degrees between the chord lines of the two adjacent first blades.

Further, the rear disc (2) or the front disc (1) has an outer radius R1, the second blades (32) have an inner radius R2, r2= (0.55-0.80) R1; the second blade body (34) has the same outer radius and inner radius as the second blade (32).

Further, the first blade (31) has an inner radius R3, r3= (0.20-0.45) R1.

Further, the first blade (31) is an arc-shaped blade, the front edge of the first blade is provided with an arc-shaped inlet end, and the rear edge of the first blade is provided with an arc-shaped outlet end; the second vane (32) is an arcuate vane having a leading edge with an arcuate inlet end and a trailing edge with an arcuate outlet end.

According to the energy-saving centrifugal sewage pump, through the design of the first blades and the second blades, turbulence in the impeller flow channel can be reduced, and hydraulic flow loss is reduced, so that the energy efficiency of the centrifugal sewage pump can be improved, and the energy-saving centrifugal sewage pump has the effects of saving energy and improving efficiency.

Drawings

FIG. 1 is a schematic view of an impeller structure of a centrifugal sewage pump of the prior art;

FIG. 2 is a schematic diagram of the front view of the impeller of the energy-saving centrifugal sewage pump of the utility model;

fig. 3 is a schematic side view of an impeller of the energy-saving centrifugal sewage pump of the utility model.

In the figure: front disk 1, rear disk 2, blades 3, first blades 31, second blades 32, first blades 33, second blades 34, and rotation direction R.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model is described in further detail below with reference to the accompanying drawings.

As shown in fig. 2-3, an energy-saving centrifugal sewage pump comprises a volute and an impeller, wherein the impeller is arranged in an impeller cavity formed by the volute, the impeller is a centrifugal impeller, the impeller comprises a front disc 1, a rear disc 2 and blades 3, the blades 3 are distributed along the circumferential direction and connected between the front disc 1 and the rear disc 2, the blades 3 comprise first blades 31 and second blades 32, the first blades 31 and the second blades 32 are alternately arranged at intervals along the circumferential direction, and the lengths of the first blades 31 and the second blades 32 are unequal; the method is characterized in that: the length of the first blade 31 is greater than the length of the second blade 32, and the thickness H2 of the first blade 31 is greater than the thickness H1 of the second blade 32.

Further, the first blade 31 includes a first blade body 33, and a second blade body 34, the first blade body 33 having a thickness H2, and the second blade body 34 having a thickness H1.

Thickness h1= (0.4-0.7) H2, preferably 0.55.

One side blade surface of the first blade 31 is a smooth arc surface, and the other side blade surface adjacent to the second blade 32 is a stepped blade surface.

The second blades 32 divide the impeller flow path between two adjacent first blades 31 unevenly in the circumferential direction, specifically, an included angle a=10 to 20 °, preferably 14 to 16 °, between the chord line of the first blade 31 and the chord line of the adjacent second blade 32; the angle between the chords of adjacent two first blades 31 is b=65-78 °, preferably 70-72 °.

Further, the rear disc 2 or the front disc 1 has an outer radius R1, and the second blades 32 have an inner radius R2, r2= (0.6-0.75) R1, preferably 0.68.

The first blade 31 has an inner radius R3, r3= (0.25-0.40) R1, preferably 0.32.

The second blade body 34 has the same outer and inner radii as the second blade body 32.

According to the energy-saving centrifugal sewage pump, through the design of the first blades 31 and the second blades 32, turbulence in the impeller flow channel can be reduced, and hydraulic flow loss is reduced, so that the energy efficiency of the centrifugal sewage pump can be improved, and the energy-saving centrifugal sewage pump has the effects of saving energy and improving efficiency.

The first vane 31 is an arc-shaped vane, the front edge (radially inner end) of which has an arc-shaped inlet end, and the rear edge (radially outer end) of which has an arc-shaped outlet end; the second vane 32 is an arcuate vane having an arcuate inlet end at its leading edge (radially inner end) and an arcuate outlet end at its trailing edge (radially outer end).

It should be noted that, in the embodiments of the present utility model, all directional indicators (such as up, down, left, right, front, back, horizontal, vertical, etc.) are only used to explain the relative positional relationship, movement situation, etc. between the components in a specific posture (as shown in the drawings), if the specific posture changes, the directional indicators correspondingly change, where the "connection" may be a direct connection or an indirect connection, and the "setting", "setting" may be a direct setting or an indirect setting.

The above-described embodiments are illustrative of the present utility model and are not intended to be limiting, and it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the spirit and scope of the present utility model as defined by the appended claims and their equivalents.

Claims

1. The energy-saving centrifugal sewage pump comprises a volute and an impeller, wherein the impeller is arranged in an impeller cavity formed by the volute, the impeller is a centrifugal impeller, the impeller comprises a front disc (1), a rear disc (2) and blades (3), a plurality of blades are distributed along the circumferential direction and are connected between the front disc and the rear disc, the blades (3) comprise first blades (31) and second blades (32), the first blades and the second blades are alternately arranged at intervals along the circumferential direction, and the lengths of the first blades and the second blades are different; the method is characterized in that: the length of the first blade (31) is greater than the length of the second blade (32), and the thickness (H2) of the first blade is greater than the thickness (H1) of the second blade (32).

2. An energy efficient centrifugal sewage pump according to claim 1, wherein the first blade (31) comprises a first blade body (33) having a thickness H2, a second blade body (34) having a thickness H1; thickness h1= (0.4-0.7) H2.

3. An energy efficient centrifugal sewage pump according to claim 2, wherein one side of the first vane (31) has a smooth arcuate surface and the other side adjacent to the second vane (32) has a stepped vane surface.

4. A centrifugal energy-efficient sewage pump as claimed in claim 3, wherein the second blades (32) divide the impeller flow path between two adjacent first blades (31) unevenly in the circumferential direction, and the angle a=8-23° between the chord line of the first blades and the chord line of the adjacent second blades, and the angle b=62-80 ° between the chord lines of the two adjacent first blades.

5. An energy efficient centrifugal sewage pump according to claim 4, wherein the rear disc (2) or the front disc (1) has an outer radius R1 and the second blades (32) have an inner radius R2, r2= (0.55-0.80) R1; the second blade body (34) has the same outer radius and inner radius as the second blade (32).

6. An energy efficient centrifugal sewage pump according to claim 5, wherein the first vane (31) has an inner radius R3, r3= (0.20-0.45) R1.

7. An energy efficient centrifugal sewage pump according to claim 1 or 6, wherein the first vane (31) is an arcuate vane having an arcuate inlet end at its leading edge and an arcuate outlet end at its trailing edge; the second vane (32) is an arcuate vane having a leading edge with an arcuate inlet end and a trailing edge with an arcuate outlet end.