A new axial flow pump structure

Abstract

The utility model relates to the technical field of axial flow pump, and disclose a new type axial flow pump structure, solved the problem that the existing axial flow pump is easy to produce vortex, it includes the pump shell, the side of pump shell top fixedly installed with mounting seat, the inside of mounting seat is penetrated with the main shaft, the bottom of main shaft extends to the inside of pump shell, the bottom of main shaft is fixedly installed with the impeller, the bottom of pump shell inboard wall is welded with the guide vane body of the sleeve in main shaft and with main shaft rotation connection, the inside of pump shell is fixedly installed with the auxiliary support subassembly of the sleeve in main shaft and with main shaft rotation connection in the middle position, the bottom of pump shell inboard wall is welded with a plurality of preposition guide vane, the top of pump shell inboard wall is provided with the thickening layer, the inboard wall of thickening layer is welded with a plurality of postposition guide vane, through this axial flow pump can reduce the generation of vortex, improve the service life.

Description

Technical Field

[0001] This utility model belongs to the field of axial flow pump technology, specifically a novel axial flow pump structure. Background Technology

[0002] Axial flow pumps are pumps that use the force generated by the blades of a rotating impeller to transport liquid along the axial direction. They include vertical, horizontal, inclined, and through-flow types, and are characterized by high flow rates and low head. Existing axial flow pumps are prone to vortices due to uneven flow velocity and pressure fluctuations. The generation of vortices poses a risk of cavitation and also generates vibration and noise, affecting the stability and service life of the axial flow pump. Therefore, this application proposes a novel axial flow pump structure. Utility Model Content

[0003] In view of the above situation and to overcome the defects of the prior art, this utility model provides a novel axial flow pump structure, which effectively solves the problem that existing axial flow pumps are prone to generating eddies.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a novel axial flow pump structure, including a pump casing, a mounting base fixedly disposed on the side of the top of the pump casing, a main shaft penetrating through the interior of the mounting base, the bottom end of the main shaft extending into the interior of the pump casing, an impeller fixedly disposed at the bottom end of the main shaft, a guide vane body sleeved on and rotatably connected to the main shaft welded to the bottom end of the inner wall of the pump casing, an auxiliary support assembly sleeved on and rotatably connected to the main shaft fixedly disposed in the middle position inside the pump casing, a plurality of front guide vanes welded to the bottom end of the inner wall of the pump casing, a thickened layer disposed at the top of the inner wall of the pump casing, and a plurality of rear guide vanes welded to the inner wall of the thickened layer.

[0005] Preferably, the axial tilt angle of the front guide vane is 33 degrees, the front guide vane is a thin plate structure, and both ends of the front guide vane are tapered structures.

[0006] Preferably, the dimensions of the rear guide vane increase from the bottom to the top, the bottom of the rear guide vane is a conical structure, and the cross-section of the rear guide vane is a triangular structure.

[0007] Preferably, the pump casing is composed of an inlet horn section, a main casing, an intermediate section, and a bend section. The main casing is bolted to the top of the inlet horn section, the intermediate section is bolted to the top of the main casing, the bend section is bolted to the top of the intermediate section, a front guide vane is installed on the inner wall of the inlet horn section, and a thickened layer and a rear guide vane are installed on the inner wall of the bend section.

[0008] Preferably, the diameter of the inlet end of the inlet horn section is 1.3 times the diameter of the impeller.

[0009] Preferably, a coupling is provided at the top end of the main shaft.

[0010] Preferably, the auxiliary support assembly consists of a sleeve, a flow guide sleeve, two support arms, and two connecting plates. The sleeve is rotatably connected to the main shaft via bearings. The flow guide sleeve is welded to the bottom end of the sleeve. The support arms are welded to the side of the sleeve. The connecting plates are welded to the top end of the support arms away from the sleeve and connected to the inner wall of the pump casing via bolts.

[0011] Compared with the prior art, the beneficial effects of this utility model are: (1) During operation, by setting a front guide vane, the fluid can be forced to pre-swirl to counteract impeller disturbance. The axial tilt angle of the front guide vane is designed to be 33 degrees, which effectively reduces the generation of vortices. By setting a thickened layer, the impact resistance can be improved. By setting a rear guide vane, the rotational kinetic energy can be converted into pressure energy, reducing the wake vortex. (2) By setting the pump casing consisting of the inlet horn section, the main casing, the intermediate section and the bend section, a multi-section connection structure can be formed, which facilitates the assembly and maintenance of internal components. By setting the inlet diameter of the inlet horn section to be 1.3 times the impeller diameter, the flow velocity can be evenly distributed. By setting the auxiliary support assembly consisting of the sleeve, the guide sleeve, two support arms and two connecting plates, the main shaft can be auxiliaryly supported and positioned, thereby improving the stability of the main shaft. Attached Figure Description

[0012] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0013] In the attached diagram: Figure 1 This is a schematic diagram of the axial flow pump structure of this utility model; Figure 2 This is a cross-sectional view of the axial flow pump of this utility model; Figure 3 This is a schematic diagram of the connection structure between the front guide vane and the inlet horn section of this utility model; Figure 4 This is a schematic diagram of the rear-mounted air guide plate structure of this utility model; Figure 5 This is a schematic diagram of the auxiliary support component structure of this utility model; In the diagram: 1. Pump casing; 2. Mounting base; 3. Main shaft; 4. Impeller; 5. Guide vane; 6. Auxiliary support assembly; 7. Front guide vane; 8. Thickened layer; 9. Rear guide vane; 10. Inlet horn section; 11. Main casing; 12. Intermediate section; 13. Bend section; 14. Coupling; 15. Sleeve; 16. Guide sleeve; 17. Support arm; 18. Connecting plate. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0015] Depend on Figures 1 to 5 This invention discloses a novel axial flow pump structure, comprising a pump casing 1, a mounting base 2 fixedly disposed on the side of the top of the pump casing 1 for mounting a main shaft 3, the main shaft 3 being disposed through the interior of the mounting base 2, the bottom end of the main shaft 3 extending into the interior of the pump casing 1, an impeller 4 fixedly disposed at the bottom end of the main shaft 3, the impeller 4 being driven to rotate by the main shaft 3 to transport fluid, a guide vane 5 welded to the bottom end of the inner wall of the pump casing 1 and sleeved on and rotatably connected to the main shaft 3, the guide vane 5 eliminating the rotational component of the liquid, allowing the fluid to flow along the pump shaft direction and increasing the liquid pressure, an auxiliary support assembly 6 fixedly disposed in the middle position inside the pump casing 1 and sleeved on and rotatably connected to the main shaft 3, providing auxiliary support and positioning for the main shaft 3 and improving the stability of the main shaft 3; Several front guide vanes 7 are welded to the bottom of the inner wall of the pump casing 1. A thickened layer 8 is provided at the top of the inner wall of the pump casing 1. Several rear guide vanes 9 are welded to the inner wall of the thickened layer 8. A coupling 14 is provided at the top of the main shaft 3. The axial tilt angle of the front guide vanes 7 is 33 degrees. The front guide vanes 7 are thin plate-shaped structures. Both ends of the front guide vanes 7 are tapered structures. The dimensions of the rear guide vanes 9 increase from the bottom to the top. The bottom of the rear guide vanes 9 is tapered. The cross-section of the rear guide vanes 9 is triangular. The front guide vane with an axial tilt angle of 33 degrees can force the fluid to pre-swirl to counteract impeller disturbance and effectively reduce the generation of vortices. During the fluid rise, it will generate a large impact force on the bend of the pump casing 1. The thickened layer 8 can improve the impact resistance. The rear guide vane 9 can convert rotational kinetic energy into pressure energy and reduce tail vortex. The pump casing 1 is composed of an inlet horn section 10, a main casing 11, an intermediate section 12, and a bend section 13. The main casing 11 is bolted to the top of the inlet horn section 10, the intermediate section 12 is bolted to the top of the main casing 11, and the bend section 13 is bolted to the top of the intermediate section 12. A front guide vane 7 is installed on the inner wall of the inlet horn section 10, and a thickened layer 8 and a rear guide vane 9 are installed on the inner wall of the bend section 13. The diameter of the inlet end of the inlet horn section 10 is 1.3 times the diameter of the impeller 4. The separate design of the inlet horn section 10, main shell 11, intermediate section 12 and bend section 13 facilitates the assembly and maintenance of internal components. The flared design of the inlet horn section 10 enables uniform flow velocity distribution. The auxiliary support assembly 6 consists of a sleeve 15, a flow guide sleeve 16, two support arms 17 and two connecting plates 18. The sleeve 15 is rotatably connected to the main shaft 3 through a bearing. The flow guide sleeve 16 is welded to the bottom end of the sleeve 15. The support arms 17 are welded to the side of the sleeve 15. The connecting plates 18 are welded to the top end of the support arms 17 away from the sleeve 15 and are connected to the inner wall of the pump housing 1 by bolts. The sleeve 15 and the support arm 17 provide auxiliary support and positioning for the main shaft 3, improving the stability of the main shaft 3 and preventing vibration. The sleeve 15 is rotatably connected to the main shaft 3 through the bearing, which can improve the connection mobility. The guide sleeve 16 can guide the fluid and reduce the impact of the fluid on the bearing.

[0016] During operation, the pre-guided vanes force the fluid to pre-swirl to counteract impeller disturbances. The axial tilt angle of the pre-guided vanes is designed at 33 degrees, effectively reducing the generation of eddies. The thickened layer improves impact resistance. The rear guide vanes convert rotational kinetic energy into pressure energy, reducing wake vortices. The pump casing, consisting of an inlet horn section, main casing, intermediate section, and bend section, forms a multi-section connection structure, facilitating the assembly and maintenance of internal components. The inlet diameter of the inlet horn section is 1.3 times the impeller diameter, ensuring uniform flow velocity distribution. The auxiliary support assembly, consisting of a sleeve, guide sleeve, two support arms, and two connecting plates, provides auxiliary support and positioning for the main shaft, improving its stability.

Claims

1. A novel axial flow pump structure, comprising a pump casing (1), characterized in that: A mounting base (2) is fixedly provided on the side of the top of the pump casing (1). A main shaft (3) is provided through the inside of the mounting base (2). The bottom end of the main shaft (3) extends into the inside of the pump casing (1). An impeller (4) is fixedly provided at the bottom end of the main shaft (3). A guide vane (5) is sleeved on the main shaft (3) and rotatably connected to the main shaft (3) and welded to the bottom end of the inner wall of the pump casing (1). An auxiliary support assembly (6) is fixedly provided in the middle position inside the pump casing (1) and sleeved on the main shaft (3) and rotatably connected to the main shaft (3). Several front guide vanes (7) are welded to the bottom end of the inner wall of the pump casing (1). A thickened layer (8) is provided at the top of the inner wall of the pump casing (1). Several rear guide vanes (9) are welded to the inner wall of the thickened layer (8).

2. The novel axial flow pump structure according to claim 1, characterized in that: The axial tilt angle of the front guide vane (7) is 33 degrees. The front guide vane (7) is a thin plate structure, and both ends of the front guide vane (7) are tapered structures.

3. The novel axial flow pump structure according to claim 1, characterized in that: The rear guide vane (9) increases in size from bottom to top. The bottom of the rear guide vane (9) is tapered and the cross-section of the rear guide vane (9) is triangular.

4. The novel axial flow pump structure according to claim 1, characterized in that: The pump casing (1) is composed of an inlet horn section (10), a main casing (11), an intermediate section (12), and a bend section (13). The main casing (11) is bolted to the top of the inlet horn section (10), the intermediate section (12) is bolted to the top of the main casing (11), the bend section (13) is bolted to the top of the intermediate section (12), the front guide vane (7) is installed on the inner wall of the inlet horn section (10), and the thickened layer (8) and the rear guide vane (9) are installed on the inner wall of the bend section (13).

5. The novel axial flow pump structure according to claim 4, characterized in that: The diameter of the inlet end of the inlet horn section (10) is 1.3 times the diameter of the impeller (4).

6. The novel axial flow pump structure according to claim 1, characterized in that: A coupling (14) is provided at the top of the main shaft (3).

7. The novel axial flow pump structure according to claim 1, characterized in that: The auxiliary support assembly (6) consists of a sleeve (15), a flow guide sleeve (16), two support arms (17) and two connecting plates (18). The sleeve (15) is rotatably connected to the main shaft (3) through a bearing. The flow guide sleeve (16) is welded to the bottom end of the sleeve (15). The support arms (17) are welded to the side of the sleeve (15). The connecting plates (18) are welded to the top of the support arms (17) away from the sleeve (15) and connected to the inner wall of the pump housing (1) through bolts.

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