Semi-open double-suction impeller with strong anti-clogging capacity

Abstract

The utility model relates to a half -open type double -suction impeller with high anti -blocking capacity, include: impeller, the symmetrical or asymmetric formula blade is set up on the impeller, the impeller adopts the impeller nut and is fixed on the pump shaft, the blade import edge is close to the impeller import, the import edge shape is the small curvature arc close to straight line, the impeller is centrifugal type double -suction impeller or is mixed -flow type double -suction impeller. The blade import edge is close to the impeller import and is in the distance smaller between the front and rear streamline, can strengthen the guiding action to solid particle, make solid particle, fibre and so on impurity more smoothly pass through the impeller flow passage, reduce the risk of jamming due to local accumulation. Make the blade import edge leading edge large -angle sweep to improve the impurity passing capacity and anti -winding capacity of the impeller, the export edge does variable wrap angle, makes the export edge on the same angle. The utility model half -open type double -suction impeller can effectively transport the medium with high solid content and larger solid particle or fibre and so on impurity.

Description

Technical Field

[0001] This utility model relates to a semi-open double-suction impeller, specifically a semi-open double-suction impeller with a large flow channel and open structure, suitable for media with high solid content or viscous content, and capable of allowing the passage of larger solid particles with strong anti-clogging ability. Background Technology

[0002] Double-suction pumps are characterized by high flow rate, high head, and stable operation, and are widely used in applications such as farmland irrigation, mine drainage, and industrial wastewater treatment where the media contain solid impurities. Therefore, there is a strong engineering and market demand for a double-suction pump with high flow rate, high head, strong anti-clogging capabilities, and suitability for harsh working conditions.

[0003] A traditional double-suction pump is a centrifugal pump with a special structure. The impeller consists of two single-suction centrifugal pump impellers placed back to back. It can transport media with low solid content and small particle diameter, but has weak anti-clogging ability. Figure 1 This is a schematic diagram of a commonly used double-suction pump impeller, such as... Figure 1 As shown, the impeller body 100' consists of two back-to-back single-suction centrifugal pump impellers 101'. Figure 1 The impeller in the middle has weak anti-clogging ability. The blade inlet edge is close to the impeller inlet and the distance between the front and rear streamlines is large. It has little guiding effect on solid particles. Solid particles, fibers and other impurities cannot pass smoothly through the impeller flow channel, and there is a risk of blockage caused by local accumulation. Utility Model Content

[0004] To address the aforementioned problems, the main objective of this invention is to provide a semi-open double-suction impeller with a large flow channel and open structure, suitable for media with high solid content or high viscosity, allowing the passage of larger solid particles and possessing strong anti-clogging capabilities.

[0005] This utility model solves the above-mentioned technical problems through the following solution: a semi-open double-suction impeller with strong anti-clogging ability, the semi-open double-suction impeller with strong anti-clogging ability includes: an impeller, the impeller is provided with symmetrical blades, the impeller is fixed to the pump shaft by an impeller nut, the blade inlet side is close to the impeller inlet, the inlet side shape is a small curvature arc that is close to a straight line, and the impeller is a centrifugal double-suction impeller or a mixed-flow double-suction impeller.

[0006] In a specific embodiment of this utility model, the specific speed is between 10 and 300, the impeller is a centrifugal impeller, the impeller outlet is designed with a flat angle, the leading edge of the inlet edge is swept back by 90 to 130°, and the outlet edge is made with a variable wrap angle so that the outlet edges are at the same angle.

[0007] In a specific embodiment of this utility model, the specific speed is between 300 and 800, the impeller is a mixed-flow impeller, the impeller outlet is designed with an inclined angle, the leading edge of the inlet side is swept back by 90 to 130°, and the outlet side is made with a variable wrap angle so that the outlet side is at the same angle.

[0008] In a specific embodiment of this utility model, the blades provided on the impeller are symmetrical or asymmetrical.

[0009] In a specific embodiment of this utility model, the impeller is hollow.

[0010] The positive and progressive effects of this invention are as follows: The semi-open double-suction impeller with strong anti-clogging capability provided by this invention features blades with inlet edges close to the impeller inlet and a small distance between the front and rear streamlines, which enhances the guiding effect on solid particles, allowing solid particles, fibers, and other impurities to pass through the impeller channel more smoothly and reducing the risk of clogging caused by local accumulation. The large-angle sweepback of the blade inlet edge improves the impeller's impurity throughput and anti-winding ability, while the variable wrap angle at the outlet edge ensures that the outlet edges are at the same angle. The high flow rate and high head characteristics of the double-suction structure further improve the impeller's impurity throughput performance. Symmetrical blade designs and staggered blade designs can be used according to hydraulic and structural requirements. This semi-open double-suction impeller can effectively transport media with high solid content and large solid particles or fibers. This invention uses fewer blades to increase the impeller channel area, which is also one of the important methods to increase the maximum particle diameter. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a commonly used double-suction pump impeller.

[0012] Figure 2 This is one of the front views (line drawing) of the symmetrical blade of this utility model.

[0013] Figure 3 This is the second front view (rendering) of the symmetrical blade of this utility model.

[0014] Figure 4 This is one of the structural schematic diagrams (line drawing) of the symmetrical blades in this utility model.

[0015] Figure 5 This is the second schematic diagram of the symmetrical blades in this utility model (effect view).

[0016] Figure 6 This is one of the front views (line drawing) of the asymmetric blade in this utility model.

[0017] Figure 7 This is the second front view (rendering) of the asymmetric blade in this utility model.

[0018] Figure 8 This is one of the left views (line drawing) of the asymmetric blade in this utility model.

[0019] Figure 9 This is the second left view (rendering) of the asymmetric blade in this utility model.

[0020] Figure 10 This is one of the structural schematic diagrams (line drawing) of the mixed-flow double-suction impeller in this utility model.

[0021] Figure 11 This is the second schematic diagram (effect view) of the mixed-flow double-suction impeller in this utility model.

[0022] Figure 12-1 This is a schematic diagram of the centrifugal double-suction impeller in this utility model.

[0023] Figure 12-2 This is a schematic diagram of the mixed-flow double-suction impeller in this utility model.

[0024] Figure 13 This is a schematic diagram of the installation position of this utility model.

[0025] The following are the names corresponding to the reference numerals in this utility model:

[0026] Figure 1 In the middle: impeller body 100', single-suction centrifugal pump impeller 101'.

[0027] Figure 2-13 In the middle: impeller 1, blade 2, impeller nut 3, pump shaft 4, centrifugal double-suction impeller 101, mixed-flow double-suction impeller 102. Detailed Implementation

[0028] The preferred embodiments of this utility model are given below with reference to the accompanying drawings to illustrate the technical solution of this utility model in detail.

[0029] Figure 2 This is one of the front views (line drawing) of the symmetrical blade of this utility model. Figure 3 This is the second front view (rendering) of the symmetrical blade of this utility model. Figure 4 This is one of the structural schematic diagrams (line drawing) of the symmetrical blades in this utility model. Figure 5 This is the second schematic diagram (rendering) of the symmetrical blades in this utility model. Figure 6 This is one of the front views (line drawing) of the asymmetric blade in this utility model. Figure 7 This is the second front view (rendering) of the asymmetric blade in this utility model. Figure 13 This is a schematic diagram of the installation position of this utility model, as shown below. Figure 2-7As shown in Figure 13: The semi-open double-suction impeller with strong anti-clogging ability proposed in this utility model includes: an impeller 1, symmetrical blades 2 on the impeller, the impeller 1 is fixed to the pump shaft by an impeller nut 3, the blade inlet side is close to the impeller inlet, the inlet side shape is a small curvature arc that is close to a straight line, and the impeller is a centrifugal double-suction impeller or a mixed-flow double-suction impeller.

[0030] The impeller of this invention features symmetrical or asymmetrical blades. In specific implementations, the impeller is hollow inside. Figure 11 .

[0031] The impeller of this invention generally comes in two types. When the specific speed is between 10 and 300 (inclusive), the impeller is a centrifugal impeller with a flat-angle outlet, a 90-130° sweepback at the leading edge of the inlet, and a variable wrap angle at the outlet to ensure that the outlet edges are at the same angle. When the specific speed is between 300 and 800, the impeller is a mixed-flow impeller with an inclined outlet, a 90-130° sweepback at the leading edge of the inlet, and a variable wrap angle at the outlet to ensure that the outlet edges are at the same angle.

[0032] Figure 2 This is one of the front views of the symmetrical blades of this utility model. Figure 2 In this design, the outlet edge adopts the same angle difference as the inlet sweep (i.e., the outlet edge is at the same angle) in order to maintain the smoothness of the medium flow in the flow channel after the impeller rim inlet edge sweeps back at a large angle, reduce undesirable flow structures, reduce impact losses, improve impeller hydraulic efficiency, and enhance the structural reliability of the impeller under harsh operating conditions.

[0033] Figure 10 This is one of the structural schematic diagrams (line drawing) of the mixed-flow double-suction impeller in this utility model. Figure 11 This is the second schematic diagram (rendering) of the mixed-flow double-suction impeller in this utility model. Figure 10 and 11 As shown, Figure 10 Point E is the front streamline of the mixed-flow double-suction impeller, point F is the rear streamline of the mixed-flow double-suction impeller, point G is the position of the blade inlet edge in the traditional design, point H is the position of the blade inlet edge in the new design of this application, and point I is the impeller inlet. It can be seen that in this application, the blade inlet edge is close to the impeller inlet and the distance between the front and rear streamlines is small, and the shape of the inlet edge is a small curvature arc that is close to a straight line.

[0034] Figure 2 The image shows an example where the leading edge of the blade inlet is swept back by 90°. Figure 2 Combination Figure 10 , 11The blade inlet edge is close to the impeller inlet, and the distance between the front and rear streamlines is small, which enhances the guiding effect on solid particles, allowing solid particles, fibers, and other impurities to pass through the impeller channel more smoothly, reducing the risk of blockage caused by local accumulation. A large-angle sweepback of the blade inlet edge improves the impeller's impurity throughput and anti-winding ability, while a variable wrap angle at the outlet edge ensures that the outlet edges are at the same angle. The high flow rate and high head characteristics of the double-suction structure further improve the impeller's impurity throughput performance. Symmetrical blade designs and staggered blade designs can be used according to hydraulic and structural requirements. This semi-open double-suction impeller can effectively transport media with high solid content and large solid particles or fibers. This invention uses fewer blades to increase the impeller channel area, which is also one of the important methods to increase the maximum particle diameter.

[0035] Figure 6 This is one of the front views (line drawing) of the asymmetric blade in this utility model. Figure 7 This is the second front view (rendering) of the asymmetric blade in this utility model. Figure 8 This is one of the left views (line drawing) of the asymmetric blade in this utility model. Figure 9 This is the second left view (rendering) of the asymmetric blade in this utility model, as shown. Figure 6-9 As shown: In a symmetrical impeller, the blades at both ends are symmetrically distributed in the middle. On this basis, in an asymmetrical impeller, the blades at both ends are offset at an angle, thus forming an offset or staggered distribution of the blades at both ends.

[0036] Figure 12-1 This is a schematic diagram of the centrifugal double-suction impeller in this utility model. Figure 12-2 This is a schematic diagram of the mixed-flow double-suction impeller in this utility model, as shown below. Figure 12-1 and 12-2 As shown: In this utility model, the centrifugal impeller outlet is inclined at 0°. Figure 12-1 At point A, the mixed-flow impeller has an outlet tilt angle, participating in... Figure 12-2 Point B in the diagram. The impeller shape changes depending on the specific speed of this invention. For specific speeds of 10-300, it is a centrifugal impeller with an outlet inclination of 0°, while for 300-800, it is a mixed-flow impeller with an outlet inclination angle.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A semi-open double-suction impeller with strong anti-clogging ability, characterized in that: The semi-open double-suction impeller with strong anti-clogging capability includes: an impeller with blades, the impeller being fixed to the pump shaft by an impeller nut, the blade inlet side being close to the impeller inlet, the inlet side being a small curvature arc that is close to a straight line, and the impeller being a centrifugal double-suction impeller or a mixed-flow double-suction impeller.

2. The semi-open double-suction impeller with strong anti-clogging ability according to claim 1, characterized in that: The specific speed is between 10 and 300. The impeller is a centrifugal impeller with a flat angle design at the impeller outlet. The leading edge of the inlet side is swept back by 90 to 130°, and the outlet side has a variable wrap angle so that the outlet side is at the same angle.

3. The semi-open double-suction impeller with strong anti-clogging ability according to claim 1, characterized in that: The specific speed is between 300 and 800. The impeller is a mixed-flow impeller with an inclined design at the impeller outlet. The leading edge of the inlet side is swept back by 90 to 130°, and the outlet side has a variable wrap angle so that the outlet side is at the same angle.

4. The semi-open double-suction impeller with strong anti-clogging ability according to claim 1, characterized in that: The blades on the impeller can be symmetrical or asymmetrical.

5. The semi-open double-suction impeller with strong anti-clogging ability according to claim 1, characterized in that: The impeller is hollow inside.

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