High-pressure efficient centrifugal impeller
阅读说明：本技术 一种高压高效离心叶轮 (High-pressure efficient centrifugal impeller ) 是由 彭定泽 徐培坚 王胜 于 2020-07-06 设计创作，主要内容包括：本发明为一种高压高效离心叶轮,安装在离心泵内。离心泵还包括泵体、进水口和出水口。离心叶轮置于泵体中,离心叶轮的叶轮叶片夹于叶轮前盖与叶轮后盖之间。在叶轮前盖中心处设有口环,口环外部设有与之同心的叶轮环形壁；口环与进水口内壁之间留有一配合间隙,口环插入在进水口中。叶轮环形壁与进水口外壁之间也留有间隙；进水口被包裹于口环与叶轮环形壁之间。本发明大幅降低叶轮口环与泵体内壁配合处的间隙两侧流体的对冲,进而提高扬程与效率；其结构简单易行,无需过大更改,可直接应用在传统离心叶轮上。(The invention relates to a high-pressure high-efficiency centrifugal impeller which is arranged in a centrifugal pump. The centrifugal pump also comprises a pump body, a water inlet and a water outlet. The centrifugal impeller is arranged in the pump body, and the impeller blades of the centrifugal impeller are clamped between the impeller front cover and the impeller rear cover. The center of the front cover of the impeller is provided with a mouth ring, and the outer part of the mouth ring is provided with an annular wall of the impeller which is concentric with the mouth ring; a fit clearance is left between the mouth ring and the inner wall of the water inlet, and the mouth ring is inserted into the water inlet. A gap is also left between the annular wall of the impeller and the outer wall of the water inlet; the water inlet is wrapped between the mouth ring and the annular wall of the impeller. The invention greatly reduces the opposite impact of fluid on two sides of the clearance at the matching part of the impeller opening ring and the inner wall of the pump body, thereby improving the lift and the efficiency; the structure is simple and easy to implement, does not need to be changed greatly, and can be directly applied to the traditional centrifugal impeller.)
1. A high-pressure high-efficiency centrifugal impeller is arranged in a centrifugal pump, and the centrifugal pump also comprises a pump body (1), a water inlet (2) and a water outlet (7); the pump body (1) is of a hollow structure; the water inlet (2) is arranged in the center of the front wall of the pump body (1), and the centrifugal impeller is arranged in the pump body (1); the centrifugal impeller is formed by combining an impeller front cover (3), impeller blades (4) and an impeller rear cover (5); the impeller blades (4) are clamped between the impeller front cover (3) and the impeller rear cover (5); the method is characterized in that: an orifice ring (3.1) is arranged at the center of the impeller front cover (3), and the orifice ring (3.1) is inserted into the water inlet (2).
2. The high pressure high efficiency centrifugal impeller of claim 1, wherein: the outer part of the mouth ring (3.1) is provided with an impeller annular wall (3.2) which is concentric with the mouth ring; the diameter of the outer wall of the mouth ring (3.1) is smaller than the inner diameter of the water inlet (2), and a fit clearance (2.1) is reserved between the mouth ring and the inner wall of the water inlet (2); the inner diameter of the annular wall (3.2) of the impeller is larger than the diameter of the outer wall of the water inlet (2), and a gap is also reserved between the annular wall and the outer wall; the water inlet (2) is wrapped between the mouth ring (3.1) and the annular wall (3.2) of the impeller.
3. The high pressure high efficiency centrifugal impeller of claim 1, wherein: the water outlet (7) is arranged on the side surface of the pump body (1), and the water inlet (2), the water outlet (7) and the pump body (1) are of an integrated structure.
4. The high pressure high efficiency centrifugal impeller of claim 2, wherein: the mouth ring (3.1), the impeller annular wall (3.2) and the impeller front cover (3) are of an integrated structure.
5. The high pressure high efficiency centrifugal impeller of claim 2 or 4, wherein: the length of the impeller annular wall (3.2) exceeds the end face of the mouth ring (3.1).
6. The high pressure high efficiency centrifugal impeller of claim 1, wherein: the center of the impeller rear cover (5) is provided with a coupling column (5.1), and a rotating shaft (6) of the pump is arranged in the coupling column (5.1) in a tight fit manner to drive the centrifugal impeller to rotate.
7. The high pressure high efficiency centrifugal impeller of claim 1, 2 or 5, wherein: the impeller annular walls (3.2) are provided with a plurality of mutually separated and concentric with the mouth ring (3.1) and are arranged on the impeller front cover (3); the pump body annular wall (1.1) which is matched with the impeller annular wall (3.2) in quantity is correspondingly arranged in the front wall of the pump body (1), and the pump body annular wall (1.1) is arranged on the outer ring of the water inlet (2) and is concentric with the water inlet (2).
8. The high pressure high efficiency centrifugal impeller of claim 7, wherein: the pump body annular walls (1.1) are arranged alternately between the impeller annular walls (3.2).
Technical Field
The invention relates to the technical field of centrifugal pumps, in particular to a novel centrifugal pump impeller.
Background
The pump product is one of important general mechanical products in various fields of national economy, and the centrifugal pump occupies a large part of the market of the pump product by virtue of the advantages of large flow and high efficiency. Its main working method is that the fluid gets into from the pump body water inlet, and the rethread centrifugal impeller choma gets into the inside throw away after carrying out the pressure boost of centrifugal impeller, and then flows out from the pump body delivery port again, and wherein centrifugal impeller's choma links to each other with the pump body water inlet, and because during operation motion state's difference and fit tolerance, great clearance has to be left to both cooperations, again because the fluid pressure difference of clearance both sides is great, easily forms the offset through the clearance, finally leads to pressure, efficiency to descend by a wide margin.
Disclosure of Invention
The invention aims to provide a novel impeller for a centrifugal pump, which effectively improves the lift and efficiency of the centrifugal pump.
The purpose of the invention is realized by the following technical scheme:
a high-pressure high-efficiency centrifugal impeller is arranged in a centrifugal pump, and the centrifugal pump also comprises a pump body, a water inlet and a water outlet; the pump body is of a hollow structure; the water inlet is arranged in the center of the front wall of the pump body, the centrifugal impeller is arranged in the pump body, and the centrifugal impeller is formed by combining an impeller front cover, impeller blades and an impeller rear cover; the impeller blades are clamped between the impeller front cover and the impeller rear cover; an opening ring is arranged at the center of the front cover of the impeller and is inserted into the water inlet.
The outer part of the mouth ring is provided with an impeller annular wall concentric with the mouth ring; the diameter of the outer wall of the opening ring is smaller than the inner diameter of the water inlet, and a fit clearance is reserved between the outer wall of the opening ring and the inner wall of the water inlet; the inner diameter of the annular wall of the impeller is larger than the diameter of the outer wall of the water inlet, and a gap is also reserved between the annular wall of the impeller and the outer wall of the water inlet; the water inlet is wrapped between the mouth ring and the annular wall of the impeller.
The water outlet is arranged on the side surface of the pump body, and the water inlet, the water outlet and the pump body are of an integrated structure.
The mouth ring, the impeller annular wall and the impeller front cover are of an integrated structure.
The length of the annular wall of the impeller exceeds the end face of the orifice ring.
The center of the impeller rear cover is provided with a coupling column, and a rotating shaft of the pump is arranged in the coupling column in a tight fit manner to drive the centrifugal impeller to rotate.
The annular walls of the impellers are spaced from each other, are concentric with the opening ring and are arranged on the front cover of the impeller; the pump body annular wall which is matched with the impeller annular wall in quantity is correspondingly arranged in the front wall of the pump body, and the pump body annular wall is arranged on the outer ring of the water inlet and is concentric with the water inlet.
The pump body annular walls are staggered between the impeller annular walls.
The invention has the following excellent effects:
1. the opposite impact of fluid on two sides of a gap at the matching part of the impeller opening ring and the inner wall of the pump body is greatly reduced, and the lift and the efficiency are further improved;
2. the structure is simple and easy to implement, does not need to be changed greatly, and can be directly applied to the traditional centrifugal impeller.
Drawings
FIG. 1 is a cross-sectional view of the centrifugal impeller of the present invention in operation within a pump body;
FIG. 2 is a cross-sectional view of the multi-channel annular wall form of the centrifugal impeller of the present invention in a high lift pump application;
in the figure:
1. a pump body; 1.1, a pump body annular wall; 2. a water inlet; 2.1, matching gaps; 3. an impeller front cover; 3.1, a choma; 3.2, impeller annular wall; 4. an impeller blade; 5. a rear cover of the impeller; 5.1, a coupling column; 6. a rotating shaft; 7. and (7) a water outlet.
Detailed Description
Referring to fig. 1, the invention relates to a high-pressure high-efficiency centrifugal impeller which is arranged in a centrifugal pump. The centrifugal pump also comprises a
The center of the impeller
When the pump lift is high to a certain level, in order to further improve the efficiency and the lift, the high-pressure high-efficiency centrifugal impeller is designed into another structural form shown in fig. 2: the
The working principle of the invention is briefly described as follows:
when the pump works, because the impeller is in a dynamic state in rotation, the pump body is in a static state, in order to avoid the friction blockage of the impeller, a fit clearance 2.1 needs to be reserved between the mouth ring 3.1 and the water inlet 2, and the fluid on the two sides of the fit clearance 2.1 is larger in pressure difference distance, so that the fluid in the pump body can rush to the fluid in the water inlet 2 through the fit clearance 2.1 to form the opposite rush, and the pump lift and the efficiency are greatly reduced. After the annular wall 3.2 of the impeller is additionally arranged, the direct impact of the fluid in a high-pressure area on the fluid in the water inlet 2 is effectively weakened, and the efficiency and the lift of the pump are improved. On some relatively large pumps, because the pressure difference between the inside and the outside of the fluid is large, the effect of weakening the opposite impact can bring about great efficiency improvement when one more annular wall is added, so the actual number of the annular walls of the centrifugal impeller scheme can be determined according to the range of the pump head interval.
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