Vortex pump impeller with unequal pitches

Abstract

The utility model provides a vortex pump impeller with unequal pitches, a plurality of blade combinations (2) are uniformly distributed on an end face (5) of an impeller (1), the distance between every two adjacent blade combinations is equal, each blade combination (2) comprises four blades (3) or eight blades (3), and when each blade combination (2) comprises four blades (3), the blades (3) are uniformly distributed on the end face (5) of the impeller (1). After the four blades (3) of each blade combination (2) are sequentially arranged from head to tail, the blade pitch (4) between every two adjacent blades (3) is regularly changed from small to large, and when each blade combination (2) comprises eight blades (3), after the eight blades (3) of each blade combination (2) are sequentially arranged from head to tail, the blade pitch (4) between every two adjacent blades (3) is regularly changed from small to large. And the blade pitch (4) between every two adjacent blades (3) is regularly changed from small to large. The cavitation performance of the vortex pump can be effectively improved, and the pulsatility of the vortex pump is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid machinery, especially involve a kind of vortex pump impeller with unequal pitch. BACKGROUND

[0002] Vortex pump is a kind of vane pump, commonly used for the supporting of boiler feed water, and is widely used in shipbuilding, light textile, chemical industry, metallurgy, machinery manufacturing, aquaculture, fixed fire-fighting pressure stabilization, heat exchange unit, agricultural remote sprinkling irrigation and other departments. Vortex pump is mainly composed of impeller, pump body and pump cover, the impeller is a disc, and the blades on the circumference are uniformly arranged in a radial manner. The annular flow passage is formed between the pump body and the impeller. The suction inlet and the discharge outlet are both located at the outer circumference of the impeller. There is a partition plate between the suction inlet and the discharge outlet, which separates the suction inlet and the discharge outlet. The vortex pump has poor cavitation performance, and the pump outlet pulsation is large. The pumped medium is limited to pure liquid. When the liquid contains solid particles, the performance of the pump will be reduced or the vortex pump will not work due to the increase of axial and radial clearances caused by wear. SUMMARY

[0003] The vortex pump impeller with unequal pitch can effectively improve the cavitation performance of the vortex pump and reduce the pulsation of the vortex pump.

[0004] The utility model adopts the following technical scheme: a vortex pump impeller with unequal pitch, the impeller end face is uniformly distributed with several blade combinations, the distance between every adjacent two blade combinations is equal, every blade combination includes four blades or eight blades, when every blade combination includes four blades, the four blades of every blade combination are arranged in order from head to tail, and the blade pitch between adjacent two blades changes regularly from small to large, when every blade combination includes eight blades, the eight blades of every blade combination are arranged in order from head to tail, and the blade pitch between adjacent two blades changes regularly from small to large.

[0005] Further, each blade of the utility model is arranged in a radial direction.

[0006] Further, the blade pitch between adjacent two blades of every blade combination is arranged in an arithmetic progression after the blades are arranged in order from head to tail.

[0007] Further, the blade pitch between adjacent two blades of every blade combination is arranged in a geometric progression after the blades are arranged in order from head to tail.

[0008] The utility model has the advantages of simple structure and the following beneficial effects: the blade distribution relationship of the impeller of the vortex pump is optimized, so that spiral airflow is formed when the blades rotate, thereby increasing the force of vortex motion of liquid when the impeller rotates; when solid particles are contained in the conveyed liquid, the liquid flow containing the solid particles enters the vortex pump from the outer edge of the impeller, the force of vortex motion is increased, the gas gathered at the root of the blade is easily discharged, the cavitation performance is improved, the force of vortex motion of liquid is increased when the liquid flows out of the outlet of the vortex pump, the liquid is easily discharged from the vortex pump, the pressure of the liquid with particles on the outlet of the vortex pump is reduced, and the influence of pressure pulsation on the outlet of the vortex pump is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the present utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0010] Figure 1 It is a structural schematic diagram of the embodiment one of the present utility model. DETAILED DESCRIPTION

[0011] The preferred embodiments of the present utility model will be described in detail below with reference to the drawings, so that the advantages and characteristics of the present utility model can be more easily understood by those skilled in the art, and the protection scope of the present utility model can be more clearly and definitely defined.

[0012] In Figure 1The utility model provides a kind of vortex pump impeller with unequal pitch, the impeller 1 end surface 5 evenly distribute several blade combinations 2, several blade combinations 2 distribute in the outer edge of impeller 1 end surface 5, the even distribution of the present embodiment impeller 1 end surface 5 has six blade combinations 2, six blade combinations 2 distribute in the outer edge of impeller 1 end surface 5, the distance between every adjacent two blade combinations is equal, every blade combination 2 includes four blades 3 or eight blades 3, when every blade combination 2 includes four blades 3, four blades 3 of every blade combination 2 are sequentially arranged from head to tail, blade pitch 4 between adjacent two blades 3 changes regularly from small to big, when every blade combination 2 includes eight blades 3, eight blades 3 of every blade combination 2 are sequentially arranged from head to tail, blade pitch 4 between adjacent two blades 3 changes regularly from small to big, the regular change can be arranged in arithmetic progression or geometric progression, every blade 3 of the present embodiment is arranged in radial direction, every blade combination 2 in the present embodiment includes four blades 3, four blades 3 are sequentially arranged from head to tail, blade pitch 4 between adjacent two blades 3 changes regularly from small to big in geometric progression, for example, four blades 3 in every blade combination 2 are sequentially arranged from head to tail as No. 1 blade, No. 2 blade, No. 3 blade and No. 4 blade, the pitch a 1 of No. 1 blade and No. 2 blade is 5cm, common ratio q is 1.5, the pitch a 2 of No. 3 blade to No. 2 blade is 5*1.5 1 =7.5 cm, the pitch a 3 of No. 4 blade to No. 3 blade is 5*1.5 2 =11.25 cm.

[0013] The use process of the utility model is as follows: in every blade combination 2 of the utility model, blade pitch 4 between adjacent two blades 3 changes regularly from small to big, which can form spiral airflow when blade 3 rotates, thereby increasing the force of vortex motion of liquid when impeller 3 rotates, especially when in geometric progression, the force of vortex motion is maximum, therefore, when conveying liquid contains solid particles, liquid flow containing solid particles enters into vortex pump from the outer edge of impeller 1, because the force of vortex motion is increased, gas gathered at the root of blade 3 is easily discharged, the cavitation performance is improved, meanwhile, the force of vortex motion of liquid is increased when liquid flows out from the outlet of vortex pump, liquid is easily discharged from vortex pump, so that the pressure of liquid with particles on the outlet of vortex pump is small, the influence of pressure pulsation on the outlet of vortex pump is reduced.

[0014] Not limited to this, any change or replacement not thought through creative labor should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be limited by the protection scope defined in the claims.

Claims

1. A vortex pump impeller with unequal pitch, characterized in that... The impeller (1) end face (5) is evenly distributed with several blade combinations (2). The distance between each pair of adjacent blade combinations is equal. Each blade combination (2) includes four blades (3) or eight blades (3). When each blade combination (2) includes four blades (3), after the four blades (3) of each blade combination (2) are arranged in order from beginning to end, the blade pitch (4) between adjacent blades (3) changes regularly from small to large. When each blade combination (2) includes eight blades (3), after the eight blades (3) of each blade combination (2) are arranged in order from beginning to end, the blade pitch (4) between adjacent blades (3) changes regularly from small to large.

2. The vortex pump impeller with unequal pitch according to claim 1, characterized in that... Each leaf (3) is arranged radially.

3. The vortex pump impeller with unequal pitch according to claim 1, characterized in that... After the blades of each blade combination (2) are arranged in order from head to tail, the blade pitch (4) between adjacent blades (3) is arranged in an arithmetic sequence from small to large.

4. The vortex pump impeller with unequal pitch according to claim 1, characterized in that... After the leaves of each leaf combination (2) are arranged in order from head to tail, the leaf pitch (4) between adjacent leaves (3) is arranged in a geometric sequence from small to large.

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