A new type of well submersible pump impeller structure

Abstract

This utility model discloses a novel impeller structure for a submersible pump used in wells, including an upper cover plate, a lower cover plate, and blades. The upper and lower cover plates are arranged vertically at intervals. Multiple blades are arranged at intervals between the upper and lower cover plates. An inlet is opened on the lower cover plate, and an outlet is formed between the edges of the upper and lower cover plates. The cross-section of the leading edge of the blades is formed by multiple curves with different radii. This utility model changes the traditional straight blade leading edge to a curved shape, and the sharp leading edge to a smooth leading edge. When the pump is working, the impeller rotates at high speed. Due to centrifugal force, the liquid between the impellers is thrown from the impeller inlet to the impeller outlet. When the liquid passes through the curved blade leading edge, it balances the direction of the separated water flow, preventing cavitation risk. The smooth leading edge effectively reduces the stress between the upper cover plate and the blades, increasing the pump's efficiency and service life.

Description

Technical Field

[0001] This utility model relates to the field of water pump impeller technology, and in particular to a novel impeller structure for well submersible pumps. Background Technology

[0002] like Figure 1 As shown, the existing submersible pump impeller structure includes an upper cover plate, a lower cover plate, and blades, with the upper and lower cover plates arranged alternately. Multiple blades are spaced between the upper and lower cover plates. An inlet is located on the lower cover plate, and an outlet is formed between the edges of the upper and lower cover plates. The leading edge of the existing blades is designed as a straight downward-facing section, with its cross-section being a straight downward-facing line, such as... Figure 2 As shown.

[0003] When the impeller is running at high speed, the blade will experience secondary flow and vortex losses. These non-mainstream flows will consume energy and reduce efficiency, thus reducing the pump's head and flow rate. At the same time, there is significant stress concentration at the blade leading edge and at the connection between the blade and the cover plate. Over a long period of operation, cracks may appear. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model designs a novel impeller structure for well submersible pumps.

[0005] The present invention adopts the following technical solution: A novel submersible pump impeller structure for wells includes an upper cover plate, a lower cover plate, and blades. The upper and lower cover plates are arranged at intervals. Multiple blades are arranged at intervals between the upper and lower cover plates. An inlet is opened on the lower cover plate, and an outlet is formed between the edges of the upper and lower cover plates. The cross-section of the leading edge of the blade is formed by multiple curves with different radii.

[0006] Preferably, the cross-section of the leading edge of the blade is formed by two curves with different radii, including a first curve and a second curve.

[0007] Preferably, the first curve has an arc of 26°-27° and a radius of 60-63mm.

[0008] Preferably, the arc of the first curve segment is 39°-41° and the radius is 4-6mm.

[0009] The beneficial effects of this utility model are: (1) This utility model changes the traditional blade leading edge from a straight line to a curved shape, and from a sharp leading edge to a smooth leading edge. When the water pump is working, the impeller rotates at high speed. Due to the centrifugal force, the liquid between the impellers is thrown from the impeller inlet to the impeller outlet. When the liquid passes through the curved blade leading edge, it will balance the direction of the separated water flow and prevent the risk of cavitation. (2) The smooth leading edge will effectively reduce the stress between the cover plate and the blade, and increase the efficiency and service life of the water pump. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of an existing submersible pump impeller structure for wells. Figure 2 This is a cross-sectional view of an existing submersible pump impeller structure for wells; Figure 3 This is a schematic diagram of the structure of this utility model; Figure 4 This is a cross-sectional view of the present invention; In the diagram: 1. Upper cover plate, 2. Lower cover plate, 3. Blade, 4. Inlet, 5. Leading edge of blade, 51. First curve segment, 52. Second curve segment. Detailed Implementation

[0011] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings: Example: Figures 3-4 As shown, a novel submersible pump impeller structure for wells includes an upper cover plate 1, a lower cover plate 2, and blades 3. The upper and lower cover plates are arranged at intervals. Multiple blades are arranged at intervals between the upper and lower cover plates. An inlet 4 is opened on the lower cover plate, and an outlet is formed between the edges of the upper and lower cover plates. The cross-section of the leading edge 5 of the blades is formed by two curves with different radii and arcs, including a first curve 51 and a second curve 52.

[0012] The first curve has an arc of 26° and a radius of 63mm. The second curve has an arc of 40° and a radius of 5mm.

[0013] This invention changes the traditional blade leading edge from a straight line to a curved shape, and from a sharp leading edge to a smooth leading edge. When the water pump is working, the impeller rotates at high speed, and the liquid between the impellers is thrown from the impeller inlet to the impeller outlet due to centrifugal force. When the liquid passes through the curved blade leading edge, it balances the direction of the separated water flow and prevents the risk of cavitation. The smooth leading edge effectively reduces the stress between the cover plate and the blade, thus increasing the efficiency and service life of the water pump.

[0014] The above-described embodiments are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A novel impeller structure for a submersible well pump, comprising an upper cover plate, a lower cover plate, and blades, wherein the upper and lower cover plates are arranged at intervals, and multiple blades are arranged at intervals between the upper and lower cover plates. An inlet is provided on the lower cover plate, and an outlet is formed between the edges of the upper and lower cover plates. The characteristic feature is that… The cross-section of the leading edge of the blade is formed by multiple curves with different radii.

2. The novel submersible pump impeller structure for wells according to claim 1, characterized in that, The cross-section of the leading edge of the blade is formed by two curves with different radii and arcs, including a first curve and a second curve.

3. The novel submersible pump impeller structure for wells according to claim 2, characterized in that, The first segment of the curve has an arc of 26°-27° and a radius of 60-63mm.

4. The novel submersible pump impeller structure for wells according to claim 2, characterized in that, The first segment of the curve has an arc of 39°-41° and a radius of 4-6mm.

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