Novel single casing slurry pump
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-08-11
AI Technical Summary
[0005]本实用新型的目的是为了解决常规单壳渣浆泵的实用性比较低的问题，而提出的新型单壳渣浆泵
[0014]采用四片叶轮，叶轮进口前伸优化，减轻高浓度浆体对后盖板的冲击；背叶片外圆直径小于盖板直径，减少冲刷；搭配无水机械密封时，采用填平结构，减薄后盖板并拓宽流道；护套端面增设的导流块，高度稍低于盖板，减少回流及局部磨损，提升过渡稳定性；采用副叶轮与机械密封的组合方案，副叶轮叶片设计为弯曲形，优化液体动力特性；机械密封箱兼容福斯、约翰克兰等多品牌机封，适配无水密封场景；轴承组件沿用成熟润滑结构，优先合成脂，保障轴承稳定性；无水密封设计解决了传统密封泄漏问题，维护周期延长30％以上；四片叶轮及导流优化，使泵体效率提升5％-8％，抗汽蚀性能优于同类产品；背叶片与护套导流块减少局部磨损，过流部件寿命延长20％以上，提高整体实用性。
Smart Images
Figure CN224621732U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of slurry pump technology, and particularly relates to a novel single-casing slurry pump. Background Technology
[0002] Single-casing slurry pumps are widely used in the transportation of high-concentration slurries in mining, metallurgy and other fields. Their sealing performance, efficiency and cavitation resistance are the core indicators.
[0003] Traditional sealing methods (such as packing seals) are prone to leakage, require frequent maintenance, and cannot be adapted to "waterless sealing" scenarios; the impeller is subjected to great impact from high-concentration slurry, and the rear cover plate wears severely, affecting its service life; there is local backflow in flow-through components (such as the sheath), which leads to increased local wear and reduced operational stability; thus, conventional single-casing slurry pumps have relatively low practicality.
[0004] Therefore, we propose a new type of single-casing slurry pump to solve the above problems. Utility Model Content
[0005] The purpose of this invention is to solve the problem of low practicality of conventional single-casing slurry pumps, and to propose a new type of single-casing slurry pump.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A novel single-casing slurry pump includes a shaft frame, on which a rotating shaft is rotatably mounted. A flange is fixedly connected to one end of the shaft frame, and a sleeve is fitted onto the flange. Bolts are installed between the sleeve and the flange. An impeller is fixedly mounted at the head of the rotating shaft. There are four impellers, with the impeller inlet extending forward. The outer diameter of the back blade is smaller than the diameter of the cover plate. The impeller is located inside the sleeve. A guide block is provided on the end face of the sleeve, with a height slightly lower than the cover plate. The rotating shaft and the flange are sealed by a combination of a secondary impeller and a mechanical seal. The blades of the secondary impeller are curved. The pump employs a four-blade impeller with an optimized forward-extending impeller inlet to reduce the impact of high-concentration slurry on the rear cover plate. The outer diameter of the back blades is smaller than that of the cover plate, reducing erosion. When paired with a waterless mechanical seal, a filler structure is used to thin the rear cover plate and widen the flow channel. A guide block added to the end face of the sheath, slightly lower than the cover plate, reduces backflow and localized wear, improving transition stability. A combination of a secondary impeller and mechanical seal is used, with the secondary impeller blades designed in a curved shape to optimize hydrodynamic characteristics. The mechanical seal housing is compatible with multiple brands of mechanical seals, including Fuchs and John Crane, adapting to waterless sealing scenarios. The bearing assembly uses a mature lubrication structure, prioritizing synthetic grease to ensure bearing stability. The waterless seal design solves the leakage problem of traditional seals, extending the maintenance cycle by more than 30%. The four-blade impeller and optimized guide block improve pump efficiency by 5%-8%, and its anti-cavitation performance is superior to similar products. The back blades and sheath guide block reduce localized wear, extending the life of flow-through components by more than 20%, improving overall practicality.
[0008] Preferably, a lifting ring is fixedly connected to the upper end of the shaft frame. The lifting ring facilitates the passage of a hook or rope, making lifting operations easier.
[0009] Preferably, a connecting nozzle is fixedly connected to the middle of the sheath. The connecting nozzle is used to connect to a water pumping pipe.
[0010] Preferably, the shaft bracket is externally fixedly connected to a mounting base.
[0011] Preferably, a motor is fixedly mounted on the shaft bracket, and the output shaft of the motor is fixedly connected to the rotating shaft. An external power supply is used to drive the motor to rotate the rotating shaft.
[0012] Preferably, a drain nozzle is fixedly connected to the outside of the sheath. The drain nozzle is used to connect an external pipe.
[0013] In summary, the technical effects and advantages of this utility model are as follows:
[0014] The pump employs a four-blade impeller with an optimized forward-extending impeller inlet to reduce the impact of high-concentration slurry on the rear cover plate. The outer diameter of the back blades is smaller than that of the cover plate, reducing erosion. When paired with a waterless mechanical seal, a filler structure is used to thin the rear cover plate and widen the flow channel. A guide block added to the end face of the sheath, slightly lower than the cover plate, reduces backflow and localized wear, improving transition stability. A combination of a secondary impeller and mechanical seal is used, with the secondary impeller blades designed in a curved shape to optimize hydrodynamic characteristics. The mechanical seal housing is compatible with multiple brands of mechanical seals, including Fuchs and John Crane, adapting to waterless sealing scenarios. The bearing assembly uses a mature lubrication structure, prioritizing synthetic grease to ensure bearing stability. The waterless seal design solves the leakage problem of traditional seals, extending the maintenance cycle by more than 30%. The four-blade impeller and optimized guide block improve pump efficiency by 5%-8%, and its anti-cavitation performance is superior to similar products. The back blades and sheath guide block reduce localized wear, extending the life of flow-through components by more than 20%, improving overall practicality. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the segmentation structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the overall structure of this utility model.
[0017] In the diagram: 1. Shaft bracket; 2. Shaft; 3. Sheath; 4. Flange; 5. Bolt; 6. Impeller; 7. Mounting base; 8. Motor; 9. Connecting nozzle; 10. Drain nozzle; 11. Lifting ring. Detailed Implementation
[0018] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments.
[0019] like Figure 1 and 2 As shown, the new single-casing slurry pump includes a shaft frame 1, a rotating shaft 2 is rotatably mounted inside the shaft frame 1, a flange 4 is fixedly connected to one end of the shaft frame 1, a sleeve 3 is matched on the flange 4, bolts 5 are installed between the sleeve 3 and the flange 4, an impeller 6 is fixedly mounted on the head of the rotating shaft 2, there are four impellers 6, and the inlet of the impeller 6 extends forward, the outer diameter of the back blade is smaller than the diameter of the cover plate, the impeller 6 is located inside the sleeve 3, the end face of the sleeve 3 is provided with a guide block, the height of which is slightly lower than the cover plate, the rotating shaft 2 and the flange 4 are sealed by a combination of auxiliary impeller and mechanical seal, the blades of the auxiliary impeller are curved. The pump employs a four-blade impeller (6), with optimized inlet extension to reduce the impact of high-concentration slurry on the rear cover plate. The outer diameter of the back blades is smaller than that of the cover plate, reducing erosion. When paired with a waterless mechanical seal, a filler structure is used to thin the rear cover plate and widen the flow channel. A guide block added to the end face of the sheath (3), slightly lower than the cover plate, reduces backflow and local wear, improving transition stability. A combination of a secondary impeller and mechanical seal is used, with the secondary impeller blades designed in a curved shape to optimize hydrodynamic characteristics. The mechanical seal housing is compatible with multiple brands of mechanical seals, including Fuchs and John Crane, adapting to waterless sealing scenarios. The bearing assembly uses a mature lubrication structure, prioritizing synthetic grease to ensure bearing stability. The waterless seal design solves the leakage problem of traditional seals, extending the maintenance cycle by more than 30%. The four-blade impeller (6) and optimized guide flow improve pump efficiency by 5%-8%, and its anti-cavitation performance is superior to similar products. The back blades and sheath guide block reduce local wear, extending the life of flow-through components by more than 20%.
[0020] like Figure 1 and 2 As shown, a lifting ring 11 is fixedly connected to the upper end of the shaft bracket 1. The lifting ring 11 facilitates the passage of a hook or rope.
[0021] like Figure 1 and 2 As shown, a connecting nozzle 9 is fixedly connected to the middle of the sheath 3. The connecting nozzle 9 is used to connect to the water pumping pipe.
[0022] like Figure 1 and 2 As shown, the shaft bracket 1 is externally fixedly connected to a mounting base 7.
[0023] like Figure 1 and 2 As shown, a motor 8 is fixedly mounted on the shaft bracket 1, and the output shaft of the motor 8 is fixedly connected to the rotating shaft 2. An external power supply is used to drive the motor 8 to rotate the rotating shaft 2.
[0024] like Figure 1 and 2 As shown, a drain nozzle 10 is fixedly connected to the outside of the sheath 3. The drain nozzle 10 is used to connect to an external pipe.
[0025] Working Principle: The pump employs a four-blade impeller (6), with optimized inlet extension to reduce the impact of high-concentration slurry on the rear cover plate. The outer diameter of the back blades is smaller than the cover plate diameter, reducing erosion. When paired with a waterless mechanical seal, a filling structure is used to thin the rear cover plate and widen the flow channel. A guide block added to the end face of the sheath (3), slightly lower than the cover plate, reduces backflow and localized wear, improving transition stability. A combination of a secondary impeller and mechanical seal is used, with the secondary impeller blades designed in a curved shape to optimize hydrodynamic characteristics. The mechanical seal housing is compatible with multiple brands of mechanical seals, including Fuchs and John Crane, adapting to waterless sealing scenarios. The bearing assembly uses a mature lubrication structure, prioritizing synthetic grease to ensure bearing stability. The waterless seal design solves the leakage problem of traditional seals, extending maintenance cycles by more than 30%. The four-blade impeller (6) and optimized guide block increase pump efficiency by 5%-8%, with superior cavitation resistance compared to similar products. The back blades and sheath guide block reduce localized wear, extending the lifespan of flow components by more than 20%.
[0026] The above description is only a preferred embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed by the utility model, based on the technical solution and the utility model concept, should be included within the protection scope of the utility model.
[0027] The description briefly mentions the application direction of the utility model in relation to existing technologies known to those skilled in the art without modification, and combines them with the utility model to form a complete technology; it avoids excessive popularization of technologies known to those skilled in the art, in order to help those skilled in the art quickly understand the main content of the utility model.
Claims
1. A novel single-casing slurry pump, characterized in that: Includes a shaft bracket (1), inside which a rotating shaft (2) is rotatably mounted. One end of the shaft bracket (1) is fixedly connected to a flange (4), and a sleeve (3) is matched on the flange (4). Bolts (5) are installed between the sleeve (3) and the flange (4). An impeller (6) is fixedly mounted on the head of the rotating shaft (2). There are four impellers (6), and the inlet of the impeller (6) extends forward. The outer diameter of the back blade is smaller than the diameter of the cover plate. The impeller (6) is located inside the sleeve (3). The end face of the sleeve (3) is provided with a guide block, which is slightly lower than the height of the cover plate. The rotating shaft (2) and the flange (4) are sealed by a combination of a secondary impeller and a mechanical seal. The blades of the secondary impeller are curved.
2. The novel single-casing slurry pump according to claim 1, characterized in that: A lifting ring (11) is fixedly connected to the upper end of the shaft bracket (1).
3. The novel single-casing slurry pump according to claim 1, characterized in that: The sheath (3) is fixedly connected to a mating nozzle (9) in the middle.
4. The novel single-casing slurry pump according to claim 1, characterized in that: The shaft bracket (1) is externally fixedly connected to a mounting base (7).
5. The novel single-casing slurry pump according to claim 1, characterized in that: A motor (8) is fixedly installed on the shaft frame (1), and the output shaft of the motor (8) is fixedly connected to the rotating shaft (2).
6. The novel single-casing slurry pump according to claim 1, characterized in that: The outer side of the sheath (3) is fixedly connected to a drain nozzle (10).