CN219299600U

CN219299600U - Improved water pump

Info

Publication number: CN219299600U
Application number: CN202320360622.XU
Authority: CN
Inventors: 王超; 童林丹
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: 2023-07-04
Anticipated expiration: 2033-03-02

Abstract

The utility model discloses an improved water pump, which comprises a volute and an impeller, wherein the impeller is a centrifugal impeller, the impeller comprises a front disc (1), a rear disc (2) and blades (3), the blades are distributed along the circumferential direction and 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 along the circumferential direction at intervals, and the lengths of the first blades and the second blades are unequal; the method is characterized in that: the rear edge of the first blade is provided with a first arc-shaped concave part (33), and the first arc-shaped concave part is arranged adjacent to the front disc side; the trailing edge of the second blade is provided with a second arcuate recess (34) disposed adjacent the aft disk side. The utility model can reduce the pressure fluctuation at the outlet end of the impeller, improve the uniformity of the pressure distribution at the outlet end of the impeller, reduce vibration, thereby improving the efficiency of the water pump and saving energy.

Description

Improved water pump

Technical Field

The utility model relates to the technical field of liquid pumps, in particular to an improved water pump.

Background

As shown in fig. 1, the conventional centrifugal water 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 unequal. However, the existing centrifugal water pump has the problems of pressure fluctuation at the outlet end of an impeller, uneven pressure distribution and larger vibration.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide an improved water pump, which can reduce pressure fluctuation at the outlet end of an impeller, improve the uniformity of pressure distribution at the outlet end of the impeller and reduce vibration by designing a first arc-shaped concave part and a second arc-shaped concave part, thereby improving the efficiency of the water pump and saving energy.

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

the improved water 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 along the circumferential direction at intervals, and the lengths of the first blades and the second blades are different; the method is characterized in that: the rear edge of the first blade (31) is provided with a first arcuate recess (33) provided adjacent to the front disc (1) side.

Further, the first arc-shaped concave part (33) has an axial width L and a radial depth H, and an impeller runner outlet axial width B is arranged between the front disc (1) and the rear disc (2), L= (0.18-0.38) B and H= (0.03-0.18) B.

Further, an axial clearance g, g= (0.08-0.19) L is provided between the first arc-shaped concave portion (33) and the front disc (1).

Further, the trailing edge of the second blade (32) is provided with a second arcuate recess (34) provided adjacent to the rear disc (2) side.

Further, the second arc-shaped concave part (34) also has an axial width L and a radial depth H, and an impeller runner outlet axial width B, L= (0.18-0.38) B and H= (0.03-0.18) B are arranged between the front disc (1) and the rear disc (2).

Further, an axial gap g, g= (0.08-0.19) L is also provided between the second arc-shaped concave portion (34) and the rear disc (2).

Further, in the circumferential direction, a plurality of first arc-shaped concave portions (33) and a plurality of second arc-shaped concave portions (34) are alternately arranged at intervals, and the first arc-shaped concave portions are arranged adjacent to the front plate (1) and the second arc-shaped concave portions are arranged adjacent to the rear plate (2).

Further, the first blade (31) has a thickness H2, the second blade (32) has a thickness H1, H1 < H2, and the second blade is disposed adjacent to the pressure face of the first blade.

Further, the thickness h1= (0.4-0.7) H2.

According to the improved water pump, through the design of the first arc-shaped concave part and the second arc-shaped concave part, pressure fluctuation at the outlet end of the impeller can be reduced, the uniformity of pressure distribution at the outlet end of the impeller is improved, vibration is reduced, and therefore the efficiency of the water pump can be improved, and energy sources are saved. Through the thickness design of the first blade and the second blade, the hydraulic flow loss can be reduced, so that the energy efficiency of the water pump can be improved, and the effects of improving the efficiency and saving the energy source are achieved.

Drawings

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

FIG. 2 is a schematic view of the front view of the impeller of the improved water pump of the present utility model;

FIG. 3 is a schematic side view of an impeller of the improved water pump of the present utility model;

fig. 4 is a schematic side view of an impeller of the improved water pump of the present utility model.

In the figure: the front disk 1, the rear disk 2, the blades 3, the first blades 31, the second blades 32, the first arc-shaped concave portions 33, the second arc-shaped concave portions 34, and the 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. 2-4, an improved water 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 along the circumferential direction at intervals, and the lengths of the first blades 31 and the second blades 32 are different; the method is characterized in that: the trailing edge (radially outer end) of the first blade 31 is provided with a first arc-shaped recess 33, and the first arc-shaped recess 33 is provided adjacent to the front disk 1 side.

Further, the first arcuate recess 33 has an axial width L, a radial depth H, and an impeller runner outlet axial width B between the front and rear disks 1, 2, l= (0.2-0.35) B, preferably 0.27; h= (0.05-0.15) B, preferably 0.1.

There is an axial gap g, g= (0.1-0.16) L, preferably 0.13, between the first arcuate recess 33 and the front disc 1.

Further, the trailing edge (radially outer end) of the second blade 32 is provided with a second arc-shaped recess 34, and the second arc-shaped recess 34 is provided adjacent to the rear disc 2 side.

The second arcuate recess 34 also has an axial width L, a radial depth H, and an impeller flowpath exit axial width B, l= (0.2-0.35) B, preferably 0.27, between the front and rear disks 1, 2; h= (0.05-0.15) B, preferably 0.1.

There is also an axial gap g, g= (0.1-0.16) L, preferably 0.13, between the second arcuate recess 34 and the rear disc 2.

In the circumferential direction, a plurality of first arc-shaped concave portions 33, a plurality of second arc-shaped concave portions 34 are alternately arranged at intervals, and the first arc-shaped concave portions 33 are arranged adjacent to the front disk 1, and the second arc-shaped concave portions 34 are arranged adjacent to the rear disk 2.

According to the improved water pump, through the design of the first arc-shaped concave part 33 and the second arc-shaped concave part 34, pressure fluctuation at the outlet end of the impeller can be reduced, the uniformity of pressure distribution at the outlet end of the impeller is improved, vibration is reduced, and therefore the efficiency of the water pump can be improved, and energy sources are saved.

Further, the first blade 31 has a thickness H2, the second blade 32 has a thickness H1, H1 < H2, and the second blade 32 is disposed adjacent to the pressure surface (convex arc surface) of the first blade 31.

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

The first vane 31 and the second vane 32 have the same outer diameter and different inner diameter.

According to the improved water pump, through the thickness design of the first blade 31 and the second blade 32, the hydraulic flow loss can be reduced, so that the energy efficiency of the water pump can be improved, and the effects of improving the efficiency and saving the energy source are achieved.

According to the improved water pump, through the design of the first arc-shaped concave part 33 and the second arc-shaped concave part 34, pressure fluctuation at the outlet end of the impeller can be reduced, the uniformity of pressure distribution at the outlet end of the impeller is improved, vibration is reduced, and therefore the efficiency of the water pump can be improved, and energy sources are saved. Through the thickness design of the first blade 31 and the second blade 32, the hydraulic flow loss can be reduced, so that the energy efficiency of the water pump can be improved, and the effects of improving the efficiency and saving the energy source are achieved.

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 improved water 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 along the circumferential direction at intervals, and the lengths of the first blades and the second blades are different; the method is characterized in that: the rear edge of the first blade (31) is provided with a first arcuate recess (33) provided adjacent to the front disc (1) side.

2. An improved water pump as claimed in claim 1, wherein said first arcuate recess (33) has an axial width L, a radial depth H, and an impeller flowpath outlet axial width B, l= (0.18-0.38) B, h= (0.03-0.18) B between the front and rear discs (1, 2).

3. An improved water pump as claimed in claim 2, characterized in that said first arcuate recess (33) has an axial clearance g, g= (0.08-0.19) L with the front plate (1).

4. An improved water pump as claimed in claim 1, characterised in that the trailing edge of the second vane (32) is provided with a second arcuate recess (34) provided adjacent the rear disc (2) side.

5. An improved water pump as claimed in claim 4, wherein said second arcuate recess (34) also has an axial width L, a radial depth H, and an impeller flowpath outlet axial width B, l= (0.18-0.38) B, h= (0.03-0.18) B between the front and rear discs (1, 2).

6. An improved water pump as claimed in claim 5, characterized in that said second arcuate recess (34) also has an axial clearance g, g= (0.08-0.19) L with the rear disc (2).

7. An improved water pump as claimed in claim 6, characterized in that in the circumferential direction a plurality of first arcuate recesses (33), a plurality of second arcuate recesses (34) are alternately arranged at intervals, the first arcuate recesses being arranged adjacent the front plate (1) and the second arcuate recesses being arranged adjacent the rear plate (2).

8. An improved water pump as claimed in claim 2 or 6, characterized in that the first vane (31) has a thickness H2, the second vane (32) has a thickness H1, H1 < H2, and the second vane is arranged adjacent to the pressure surface of the first vane.

9. An improved water pump as claimed in claim 8, wherein said thickness h1= (0.4-0.7) H2.