Slurry pump impeller

Abstract

The utility model discloses a kind of slurry pump impellers, to solve the problem of existing impeller fin wear fast, maintenance cost is high, axial force imbalance. The impeller includes wave wheel and cover plate, several wave fin assemblies are equipped between the two, wave wheel center is connected with pump body transmission through mounting port, the liquid inlet hole in the center of cover plate is used to suck in slurry. The fin outer side of wave fin assembly is equipped with wear-resistant sheath, the dovetail inclined slot of elastic flange in the side of sheath and fin fixed groove are connected, easy to disassemble and maintain;Cover plate and sheath are integrally formed and adopt nodular cast iron material, give consideration to strength and cost. The flow splitting cone opposite liquid inlet hole can straighten slurry, the vice fin of wave wheel back side can balance axial force, reduce back side slurry pressure. The utility model effectively reduces fin wear, improves maintenance efficiency and equipment adaptability, prolongs impeller service life.

Description

Technical Field

[0001] This utility model relates to the field of slurry pump technology, and in particular to a slurry pump impeller. Background Technology

[0002] In industries such as mining, metallurgy, coal, and chemicals, slurry pumps are core equipment for conveying slurry containing solid particles. The performance of their impellers directly determines the overall operating efficiency and service life of the pump. Currently, most slurry pump impellers on the market adopt an integrated structure of a single disc and fins. This structure has many technical drawbacks in practical applications.

[0003] First, the hard particles in the slurry continuously impact and rub against the impeller fins, causing rapid fin wear. Typically, the entire impeller needs to be replaced every 3-6 months, increasing equipment maintenance costs and disrupting production schedules due to downtime. Second, traditional impeller inlet structures lack effective flow rectification, easily creating turbulence as slurry enters the impeller. This exacerbates the localized impact of particles on the fins and causes unstable pump head, reducing conveying efficiency. Furthermore, existing impellers have significant deficiencies in balancing axial forces. When the impeller rotates at high speed, the pressure difference between the slurry and the two sides of the impeller generates a large axial force. This force is transmitted to the pump body's main shaft and bearings, leading to accelerated bearing wear, shortening the main shaft's lifespan, and also causing impeller vibration, increasing equipment operating noise. While some improvement solutions attempt to add auxiliary structures to the back of the impeller, these either result in significantly increased manufacturing costs due to structural complexity or are prone to wear and cannot function effectively for long periods. Additionally, existing impellers lack suitable wear-resistant solutions for different slurry compositions. Impellers made of a single material cannot simultaneously achieve wear resistance and corrosion resistance under various operating conditions, resulting in poor equipment adaptability and further limiting the application range of slurry pumps. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model proposes a slurry pump impeller that effectively reduces fin wear, improves maintenance efficiency and equipment adaptability, and extends the impeller's service life.

[0005] To achieve the above objectives, this utility model provides the following solution: A slurry pump impeller includes a pulsator and a cover plate. A plurality of corrugated fin assemblies are disposed between the pulsator and the cover plate. The pulsator has a mounting hole at its center, and a mounting port is fixedly connected to the mounting hole. The mounting port is drivenly connected to the pump body of the slurry pump. The cover plate has a liquid inlet at its center for drawing in mixed slurry. The corrugated fin assembly includes fins, and a protective sleeve is fitted over the outer side of the fins. The protective sleeve is integrally formed with the cover plate.

[0006] Preferably, a fixing groove is formed on the periphery of the fin, and an elastic rubber flange is fixedly connected to the side of the sheath. The flange is adapted to and snapped into the fixing groove; the sheath is adapted to and fits snugly against the fin.

[0007] Preferably, the end face of the cover plate away from the impeller has a plurality of screw holes, and the cover plate passes through the screw holes and screws through the top surface of the sheath and is screwed to the fins.

[0008] Preferably, the opposite sidewalls of the fixing groove are respectively provided with dovetail-shaped inclined grooves, and the edge of the flange is adapted to the inclined groove and can be detachably connected.

[0009] Preferably, a flow divider cone is disposed opposite to the liquid inlet hole, the flow divider cone is fixedly connected to the center of the impeller, and the inner wall of the mounting port is threaded, the mounting port is connected to the pump body main shaft of the slurry pump through the thread.

[0010] Preferably, a number of auxiliary fins are fixedly connected to the periphery of the end face of the impeller away from the diverter cone.

[0011] Compared with the prior art, the present invention has the following advantages and technical effects: This invention utilizes a two-layer impeller design for the slurry pump, consisting of a pulsator and a cover plate. The slurry is drawn into the pulsator assembly through the inlet hole in the cover plate, reducing the direct impact of the slurry on the assembly. Simultaneously, the fins are covered with a sheath made of a hard, wear-resistant material, which not only reduces wear from the slurry but also improves maintenance efficiency through easy replacement. Furthermore, a flexible flange is fixedly connected to the bottom of the sheath, and the small gap between the sheath and the fins provides a degree of cushioning against impact forces. Attached Figure Description

[0012] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a side view of the three-dimensional structure of the present invention; Figure 2 This is a side view of the three-dimensional structure of the cover plate and fins; Figure 3 This is a side view of the three-dimensional structure of the impeller. Figure 4 This is a side view of the three-dimensional structure of the impeller.

[0013] Among them, 1. Impeller; 2. Cover plate; 3. Mounting hole; 4. Mounting port; 5. Liquid inlet hole; 6. Fin; 7. Sheath; 8. Fixing groove; 9. Flange; 10. Screw hole; 11. Inclined groove; 12. Diverter cone; 13. Secondary fin. Detailed Implementation

[0014] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0015] It should be noted that all components in the technical solution of this application require necessary additional facilities for water supply, oil supply, power supply, and gas supply for driving and / or control. Unless otherwise stated, they are assumed to be used and equipped with existing technology and no special explanation is required.

[0016] It should be noted that, in order to make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Depend on Figure 1-4 The impeller of a slurry pump shown includes a pulsator 1 and a cover plate 2. Several fin assemblies are arranged between the pulsator 1 and the cover plate 2. The pulsator 1 has a mounting hole 3 in its center, and a mounting port 4 is fixedly connected in the mounting hole 3. The mounting port 4 is connected to the pump body of the slurry pump. The cover plate 2 has a liquid inlet hole 5 in its center, which is used to draw in mixed slurry. The fin assembly includes fins 6, and a protective sleeve 7 is fitted on the outside of the fins 6. The protective sleeve 7 is integrally formed with the cover plate 2.

[0018] Furthermore, the sheath 7 is made of wear-resistant ceramic or hard alloy material, which can be adapted according to the specific composition of the mud, realizing the adaptability of the slurry pump to different environments and improving the service life of the impeller.

[0019] Further optimizing the design, a fixing groove 8 is formed on the periphery of the fin 6, and a flexible rubber flange 9 is fixedly connected to the side of the sheath 7. The flange 9 is adapted to and snapped into the fixing groove 8; the sheath 7 is adapted to and fits snugly against the fin 6. The flange 9 is made of flexible rubber, which can utilize the small gap between the sheath 7 and the fin 6 to achieve a certain degree of buffering against impact. At the same time, the flexible flange 9 can be squeezed into the fixing groove 8, which facilitates the installation of the sheath 7.

[0020] In a further optimized design, the end face of the cover plate 2 away from the impeller 1 has several screw holes 10. The cover plate 2 is screwed to the fins 6 through the screw holes 10 and screws passing through the top surface of the sleeve 7. Furthermore, the cover plate 2 and the sleeve 7 are integrally formed, and both the cover plate 2 and the impeller 1 are made of ductile iron, which has good hardness and toughness, and low manufacturing cost, making it easy to promote and popularize.

[0021] In a further optimized design, dovetail-shaped oblique grooves 11 are respectively provided on the opposite sidewalls of the fixing groove 8. The edge of the flange 9 is adapted to the oblique grooves 11 and can be detachably connected. The oblique grooves 11 on the sidewalls of the fixing groove 8 facilitate the flange 9 to engage the sheath 7 through the oblique grooves 11, thereby achieving initial self-locking of the sheath 7.

[0022] The scheme is further optimized. A diversion cone 12 is set directly opposite the liquid inlet hole 5. The diversion cone 12 is fixedly connected to the center of the impeller 1. The inner wall of the mounting port 4 is threaded. The mounting port 4 is connected to the pump body main shaft of the slurry pump through the thread.

[0023] In a further optimized design, several secondary fins 13 are fixedly connected to the circumference of the end face of the impeller 1 away from the diversion cone 12. The secondary fins 13 can balance the axial force during the impeller rotation process by weight as the impeller 1 rotates, and can also reduce the pressure of the mud on the back side by rotation, thereby reducing the axial force load on the impeller.

[0024] The working process of this embodiment is as follows: The implementation process of this utility model slurry pump impeller needs to be carried out in the order of component assembly, functional adaptation, and performance optimization. The specific steps are as follows: First, the impeller 1 and cover plate 2 are cast from ductile iron. Ductile iron combines good hardness and toughness, and has low manufacturing cost, meeting the needs of industrialization. A mounting hole 3 is machined in the center of the impeller 1. A threaded mounting port 4 is fixedly connected to the mounting hole 3 by welding or pinning. The mounting port 4 is used for subsequent transmission connection with the main shaft of the slurry pump body via threads, ensuring stable power transmission during impeller rotation. A liquid inlet hole 5 is opened in the center of the cover plate 2. Simultaneously, a flow divider cone 12 is fixedly connected to the center of the side of the impeller 1 facing the liquid inlet hole 5. The flow divider cone 12 is positioned directly opposite the liquid inlet hole 5, guiding and rectifying the sucked-in slurry to prevent it from directly impacting the impeller assembly. Secondly, several sets of corrugated fin assemblies are installed between the impeller 1 and the cover plate 2. Each set of corrugated fin assemblies includes fins 6 and a sleeve 7. The sleeve 7 is made of wear-resistant ceramic or hard alloy material (selected according to the specific composition of the mud; for example, hard alloy sleeves are used when conveying high-hardness particle mud, and ceramic sleeves are used when conveying corrosive mud). An elastic rubber flange 9 is fixedly connected to the side of the sleeve 7, and the edge of the flange 9 is adapted to the inclined groove 11. During assembly, the sleeve 7 is placed on the outside of the fins 6 and made to fit together. By squeezing the elastic flange 9, the flange 9 slides into the fixing groove 8 along the dovetail inclined groove 11, realizing the initial self-locking of the sleeve 7 and the fins 6. This structure not only ensures the connection stability between the sleeve 7 and the fins 6, but also facilitates the subsequent disassembly and replacement of the sleeve 7. Several screw holes 10 are machined on the end face of the cover plate 2 away from the impeller 1. The screw holes 10 penetrate the cover plate 2 and the sleeve 7 connected by the integral molding process (to ensure the structural integrity of the sleeve 7 and the cover plate 2 and to prevent mud from seeping in from the connection). Then, screws are used to penetrate the screw holes 10 on the top surface of the sleeve 7 and the cover plate 2, and finally screwed into the screw holes 10 on the top surface of the fin 6, which further strengthens the connection strength between the impeller 1, the cover plate 2 and the impeller assembly, and prevents the parts from loosening when the impeller rotates at high speed. Several auxiliary fins 13 are fixedly connected to the circumference of the end face of the impeller 1 away from the diversion cone 12. The number and distribution of the auxiliary fins 13 need to be adapted according to the impeller size and speed to ensure that the axial force can be balanced by the centrifugal force of the auxiliary fins 13 when the impeller rotates. After the overall assembly is completed, the impeller is connected to the main shaft of the slurry pump body through the mounting port 4, and the pump body is started for commissioning: the slurry is sucked in through the inlet hole 5, rectified by the diversion cone 12 and enters the impeller assembly. The sleeve 7 prevents the slurry from directly impacting the fins 6, and the elastic flange 9 uses the small gap between the sleeve 7 and the fins 6 to buffer the impact force of the slurry. At the same time, the auxiliary fins 13 rotate with the impeller 1, on the one hand balancing the axial force of the impeller by weight, and on the other hand reducing the slurry pressure on the back side of the impeller 1 and reducing the axial force load. The whole process realizes efficient slurry transportation and long-term protection of the impeller.

[0025] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A slurry pump impeller, characterized in that, The system includes a pulsator (1) and a cover plate (2). A plurality of wave fin assemblies are provided between the pulsator (1) and the cover plate (2). The pulsator (1) has a mounting hole (3) at its center. An mounting port (4) is fixedly connected inside the mounting hole (3). The mounting port (4) is connected to the pump body of the slurry pump. The cover plate (2) has a liquid inlet hole (5) at its center. The liquid inlet hole (5) is used to draw in mixed slurry. The wave fin assembly includes fins (6). A protective sleeve (7) is fitted on the outside of the fins (6). The protective sleeve (7) is integrally formed with the cover plate (2). The liquid inlet (5) is directly opposite a flow divider cone (12), which is fixedly connected to the center of the impeller (1). The inner wall of the mounting port (4) is threaded, and the mounting port (4) is connected to the pump body main shaft of the slurry pump through the thread.

2. The slurry pump impeller according to claim 1, characterized in that: The fin (6) has a fixing groove (8) on its periphery. The side of the sleeve (7) is fixedly connected to a flange (9) made of elastic rubber material. The flange (9) is adapted to and snapped into the fixing groove (8). The sleeve (7) is adapted to and fits together with the fin (6).

3. The slurry pump impeller according to claim 1, characterized in that: The cover plate (2) has several screw holes (10) on one end face away from the impeller (1). The cover plate (2) passes through the screw holes (10) and the screws penetrate the top surface of the sheath (7) and are screwed to the fin (6).

4. The slurry pump impeller according to claim 2, characterized in that: The opposite sidewalls of the fixed groove (8) are respectively provided with dovetail-shaped inclined grooves (11), and the edge of the flange (9) is adapted to the inclined grooves (11) and can be detachably connected.

5. The slurry pump impeller according to claim 1, characterized in that: Several auxiliary fins (13) are fixedly connected to the periphery of one end face of the impeller (1) away from the diverter cone (12).

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