Impeller structure of centrifugal pump applied to lifting irrigation along yellow watershed
By designing concave sand-clearing grooves and secondary blades in the centrifugal pump impeller structure, combined with wear-resistant materials, the problem of severe impeller sealing ring erosion was solved, the service life of the impeller was extended, and stable pump operation was achieved.
Patent Information
- Application Number
- CN202520139888.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-21
AI Technical Summary
When centrifugal pumps used for irrigation along the Yellow River transport silt containing solid particles, the impeller blades and sealing rings suffer severe wear, resulting in short service life and inability to operate stably for extended periods.
Design a centrifugal pump impeller structure for irrigation along the Yellow River basin, including an impeller sealing ring, auxiliary blades, front cover plate, blades, rear cover plate and hub, all cast as one piece. It is equipped with concave sand cleaning grooves and auxiliary blades to reduce the flow rate of solid particles and prevent them from entering the sealing ring. Wear-resistant materials are used and coated with hard alloy or wear-resistant coating.
This effectively improves the wear resistance of the impeller sealing ring, extends the service life of the impeller, and ensures the stable operation of the pump.
Smart Images
Figure CN223839395U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a centrifugal pump impeller structure, specifically to an impeller structure for a centrifugal pump used for irrigation along the Yellow River basin that can reduce the flow rate of solid particles during normal pump operation, prevent solid particles from directly entering the impeller sealing ring, and effectively improve the wear resistance of the impeller sealing ring. Background Technology
[0002] Centrifugal pumps used for irrigation along the Yellow River basin primarily transport silt and water containing solid particles. When pumping this abrasive two-phase flow, the impeller blades and sealing rings of vane-type centrifugal pumps experience severe erosion, becoming a key factor affecting long-term stable operation. To address the problems of severe impeller blade erosion and short impeller life, various wear-resistant impellers have been developed. Currently, most methods involve welding hard alloys, applying wear-resistant coatings, or replacing materials with wear-resistant materials at the impeller blades and sealing rings. While these improvements have increased impeller life to some extent, they still do not meet the requirements of users on-site, and the problem of short impeller life and inability to operate stably for extended periods remains prevalent. Utility Model Content
[0003] To address the aforementioned problems, the main objective of this invention is to provide an impeller structure for centrifugal pumps used for irrigation along the Yellow River basin that can reduce the flow rate of solid particles during normal pump operation, prevent solid particles from directly entering the impeller sealing ring, and effectively improve the wear resistance of the impeller sealing ring.
[0004] This utility model solves the above-mentioned technical problems through the following technical solution: a centrifugal pump impeller structure for irrigation along the Yellow River Basin, the centrifugal pump impeller structure for irrigation along the Yellow River Basin includes: an impeller sealing ring, auxiliary blades, a front cover plate, blades, a rear cover plate, and a hub. The impeller front cover plate and the impeller sealing ring are provided with concave sand-clearing grooves. The impeller front cover plate and the impeller sealing ring are provided with auxiliary blades, which are evenly distributed in the circumferential direction. The impeller sealing ring, the front cover plate, the blades, the rear cover plate, and the hub are integrally cast as one piece.
[0005] In a specific embodiment of this utility model, the size range of the sand cleaning trough is R3-R10.
[0006] In a specific embodiment of this utility model, the impeller sealing ring and the auxiliary blades are integrally cast or welded together.
[0007] In a specific embodiment of this utility model, the number of secondary blades ranges from 4 to 8.
[0008] In a specific embodiment of this utility model, the thickness of the impeller sealing ring ranges from 20 to 30 mm.
[0009] In a specific embodiment of this utility model, a positioning stop is provided on the wheel hub.
[0010] In a specific embodiment of this utility model, the impeller structure is made of wear-resistant and corrosion-resistant material.
[0011] In a specific embodiment of this utility model, the impeller sealing ring and impeller blades are integrally coated with hard alloy or other wear-resistant coatings.
[0012] The positive and progressive effects of this utility model are as follows: Compared with common technologies, the impeller structure of the centrifugal pump used for irrigation along the Yellow River basin provided by this utility model has the following advantages: This utility model has a simple structure, which can be integrally cast or welded from steel plates. By designing concave sand-clearing grooves and auxiliary blade structures at the impeller front cover plate and impeller sealing ring, the flow rate of solid particles can be reduced during normal pump operation, preventing solid particles from directly entering the impeller sealing ring, effectively improving the wear resistance of the impeller sealing ring, and solving the problems of severe sealing ring erosion and short impeller life. Addressing the harsh working conditions of the media along the Yellow River basin, this utility model significantly improves the wear resistance of the impeller sealing ring by effectively designing and improving the structure of the impeller sealing ring and front cover plate, thereby increasing impeller life and ensuring stable pump operation. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0014] Figure 2 for Figure 1 A magnified view of a portion of the image.
[0015] Figure 3 This is a rendering of the present invention.
[0016] The following are the names corresponding to the reference numerals in this utility model:
[0017] 1. Impeller sealing ring, 2. Secondary blade, 3. Front cover plate, 4. Blade, 5. Rear cover plate, 6. Hub. Detailed Implementation
[0018] 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.
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model. Figure 2 for Figure 1 A magnified view of a portion of the image. Figure 3 This is a rendering of the present invention, such as... Figure 1-3As shown: This utility model proposes a centrifugal pump impeller structure for irrigation along the Yellow River basin. The impeller structure includes: an impeller sealing ring 1, auxiliary blades 2, a front cover plate 3, blades 4, a rear cover plate 5, and a hub 6. The front cover plate 3 and the impeller sealing ring 1 are provided with concave sand-clearing grooves. The front cover plate 3 and the impeller sealing ring 1 are provided with auxiliary blades 2, which are evenly distributed in the circumferential direction. The impeller sealing ring 1, the front cover plate 3, the blades 4, the rear cover plate 5, and the hub 6 are integrally cast as one piece.
[0020] In this utility model, the impeller sealing ring 1 and the auxiliary blade 2 are integrally cast or welded together.
[0021] In specific implementation examples, the size range of the sand-cleaning trough in this invention is R3-R10. The number of auxiliary blades in this invention ranges from 4 to 8. The thickness range of the impeller sealing ring 1 is 20-30 mm. Other parameters or values can be selected according to the specific application.
[0022] To facilitate installation, the hub portion 6 of this utility model may be provided with a stop or a bayonet.
[0023] The impeller components of this utility model can be made of wear-resistant and corrosion-resistant materials; the impeller sealing ring 1 and blades 2 can also be overlaid with hard alloy or sprayed with wear-resistant coating, depending on the sand content of the water and the user's special requirements.
[0024] This utility model can be integrally cast or welded from steel plates. By designing concave sand-clearing grooves and auxiliary blade structures at the impeller front cover plate and impeller sealing ring, the flow rate of solid particles can be reduced during normal pump operation, preventing solid particles from directly entering the impeller sealing ring, effectively improving the wear resistance of the impeller sealing ring, and solving the problems of severe sealing ring erosion and short impeller life.
[0025] In response to the harsh working conditions of the media along the Yellow River basin, this utility model improves the structure of the impeller sealing ring and the front cover plate through effective design, significantly improving the wear resistance of the impeller sealing ring, thereby increasing the impeller life and ensuring the stable operation of the pump.
[0026] A concave sand-clearing groove and auxiliary blade structure are designed at the impeller front cover plate and impeller sealing ring. The location, shape and size of the sand-clearing groove, and the size and number of auxiliary blades are continuously optimized through CFD fluid simulation analysis to ensure that the design requirements can be met in real media flow.
[0027] When a medium containing solid particles enters the concave sand-cleaning trough of the impeller, the velocity of the solid particles decreases, the centrifugal force decreases, and the solid particles are eventually thrown out by the action of the secondary blades, thus achieving the purpose of sand removal. This effectively prevents solid particles from entering the impeller sealing ring and fundamentally solves the problem of impeller sealing ring wear.
[0028] 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 centrifugal pump impeller structure for irrigation along the Yellow River basin, characterized in that: The impeller structure of the centrifugal pump used for irrigation along the Yellow River Basin includes: an impeller sealing ring (1), auxiliary blades (2), a front cover plate (3), blades (4), a rear cover plate (5), and a hub (6). The front cover plate (3) and the impeller sealing ring (1) are provided with concave sand-clearing grooves. The front cover plate (3) and the impeller sealing ring (1) are provided with auxiliary blades (2). The auxiliary blades (2) are evenly distributed in the circumferential direction. The impeller sealing ring (1), the front cover plate (3), the blades (4), the rear cover plate (5), and the hub (6) are integrally cast into one piece.
2. The impeller structure of a centrifugal pump used for irrigation along the Yellow River basin according to claim 1, characterized in that: The size range of the concave sand-clearing grooves at the impeller sealing ring (1) and the front cover plate (3) is R3-R10.
3. The impeller structure of a centrifugal pump used for irrigation along the Yellow River basin according to claim 1, characterized in that: The impeller sealing ring (1) and the auxiliary blade (2) are fixed together by integral casting or welding.
4. The impeller structure of a centrifugal pump used for irrigation along the Yellow River basin according to claim 1, characterized in that: The number of secondary blades ranges from 4 to 8.
5. The impeller structure for centrifugal pumps used for irrigation along the Yellow River basin according to claim 1, characterized in that: The thickness range of the impeller sealing ring (1) is 20-30mm.
6. The impeller structure of a centrifugal pump used for irrigation along the Yellow River basin according to claim 1, characterized in that: A positioning stop is provided on the hub part (6).
7. The impeller structure for a centrifugal pump used for irrigation along the Yellow River basin according to claim 1, characterized in that: The impeller structure is made of wear-resistant and corrosion-resistant materials.
8. The impeller structure of a centrifugal pump used for irrigation along the Yellow River basin according to claim 1, characterized in that: The impeller sealing ring (1) and blades (4) are coated with hard alloy.