CN218467848U

CN218467848U - Spiral centrifugal impeller long shaft pump

Info

Publication number: CN218467848U
Application number: CN202221951247.8U
Authority: CN
Inventors: 周斐; 周寿云
Original assignee: Hunan Jinggong Special Pumps Co ltd
Current assignee: Hunan Jinggong Special Pumps Co ltd
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2023-02-10
Anticipated expiration: 2032-07-26

Abstract

The utility model discloses a spiral centrifugal impeller long axis pump, including the pump body, spiral centrifugal impeller, impeller shaft subassembly, supporting tube subassembly and mounting panel, pump body one side is equipped with the sunction inlet, and relative opposite side is equipped with the pump cover, spiral centrifugal impeller one end is located in the sunction inlet, the other end is located in the pump body, follow the sunction inlet extremely the pump body, the diameter of spiral centrifugal impeller's blade increases gradually, impeller shaft subassembly one end with spiral centrifugal impeller connects, and the other end is worn to locate in the mounting panel, supporting tube subassembly coaxial cover is located impeller shaft subassembly periphery, supporting tube subassembly one end with the pump cover is connected, the other end with the mounting panel is connected. The utility model has the advantages of simple and reliable structure, and can be suitable for mixed phase transportation of solid content, viscosity, fiber length and liquid, solid and gas.

Description

Spiral centrifugal impeller long shaft pump

Technical Field

The utility model relates to a pumping installations technical field especially relates to a spiral centrifugal impeller long axis pump.

Background

The impeller of the traditional long-shaft pump is in a conventional form, when the pump is used for conveying liquid-solid-gas mixed phase with high solid content, high viscosity and long fiber, the pump is blocked frequently to cause flow cutoff, and meanwhile, the rotor part of the pump vibrates greatly, so that pump parts are easy to damage. Therefore, the traditional long-shaft pump is not suitable for the occasions of high solid content, high viscosity, long fiber, liquid-solid-gas mixed phase conveying.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome prior art not enough, provide a simple structure, reliable, can be applicable to the spiral centrifugal impeller long axis pump that solid content is big, viscosity is big, the fibre is long, liquid solid gas miscible phase is carried.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides a spiral centrifugal impeller long axis pump, includes the pump body, spiral centrifugal impeller, impeller shaft subassembly, supporting tube subassembly and mounting panel, pump body one side is equipped with the sunction inlet, and relative opposite side is equipped with the pump cover, spiral centrifugal impeller one end is located in the sunction inlet, the other end is located in the pump body, from the sunction inlet extremely the pump body, the diameter of the blade of spiral centrifugal impeller increases gradually, impeller shaft subassembly one end with spiral centrifugal impeller connects, and the other end wears to locate in the mounting panel, supporting tube subassembly coaxial coupling is located impeller shaft subassembly periphery, supporting tube subassembly one end with the pump cover is connected, the other end with the mounting panel is connected.

As a further improvement of the above technical solution: the wrap angle of the spiral centrifugal impeller is 160-420 degrees, the inclination angle of the outlet edge is 0-23 degrees, and the outlet angle is 10-22 degrees.

As a further improvement of the above technical solution: the spiral centrifugal impeller is arranged on an impeller hub, the impeller shaft assembly is connected with the impeller hub, and the impeller hub is of a conical structure and has a cone angle of 30-70 degrees.

As a further improvement of the above technical solution: and an impeller cover plate is also arranged on the impeller hub.

As a further improvement of the above technical solution: the pumping chamber of the pump body is of a spiral structure, the suction inlet is arranged on the lower side of the pump body, the pump cover is arranged on the upper side of the pump body, and the side face of the pump body is connected with the discharge pipe.

As a further improvement of the above technical solution: the suction inlet is of a horn structure so that a flow channel is matched with the outer diameter molded line of the spiral centrifugal impeller.

As a further improvement of the technical scheme: still be equipped with the auxiliary impeller on the impeller shaft subassembly, the pump cover inboard is equipped with the seal chamber, the auxiliary impeller is located the seal chamber, the pump cover with still be equipped with the sealing member between the impeller shaft subassembly.

As a further improvement of the technical scheme: the outer side of the pump cover is provided with a balance cavity, the balance cavity is connected with a balance pipe, and the tail end of the balance pipe extends to the position above the liquid level of the medium.

As a further improvement of the technical scheme: the support pipe assembly comprises a plurality of branch pipes, guide bearing frames are arranged between the pump cover and the corresponding branch pipe and between the adjacent branch pipes, and guide bearings are arranged between the guide bearing frames and the impeller shaft assembly; the mounting plate is provided with a bearing body, a bearing cavity is arranged in the bearing body, a thrust bearing is arranged in the bearing cavity, and the impeller shaft assembly penetrates through the thrust bearing.

As a further improvement of the above technical solution: the spiral centrifugal impeller long-shaft pump also comprises a cooling pipe, a flushing channel is arranged on the guide bearing frame and is connected with the cooling pipe, and a backflow port is arranged on the branch pipe; the bearing body in bearing chamber periphery is equipped with the cooling cavity, be equipped with coolant liquid import and coolant liquid export on the cooling cavity, the coolant liquid import with the cooling tube is connected.

Compared with the prior art, the utility model has the advantages of: the utility model discloses a long shaft pump with a spiral centrifugal impeller, wherein a pump body and a pump cover are connected to a mounting plate through a supporting pipe assembly, and the weight of a unit is supported by the mounting plate; the spiral centrifugal impeller is driven by the impeller shaft assembly to rotate, one end of the spiral centrifugal impeller is located in the suction port, the other end of the spiral centrifugal impeller is located in the pump body, the self-suction port is connected with the pump body, the diameter of blades of the spiral centrifugal impeller is gradually increased, a spiral flow channel can be formed, no matter a single blade or double blades can form a large flow channel, the overflowing performance is good, the pump body is not easy to block, a medium is pushed into the pump body along the axis by utilizing the spiral characteristic, the spiral pushing effect is generated, the blades of the spiral centrifugal impeller are similar to an axial flow type booster wheel, the spiral centrifugal impeller is good in suction performance, the radius of the blades in the pump body is large, the centrifugal effect is achieved, the axial thrust work and the centrifugal work are achieved, the unit is enabled to have high extruding capacity, the whole structure is simple and reliable, and the spiral centrifugal impeller is suitable for large solid content, large viscosity, long fibers and liquid-solid-gas mixed phase conveying.

Drawings

Fig. 1 is a schematic structural view of the screw centrifugal impeller long shaft pump of the present invention.

Fig. 2 is an enlarged view of the bearing body according to the present invention.

Fig. 3 is an enlarged view of the guide bracket according to the present invention.

The reference numerals in the figures denote: 1. a pump body; 11. a suction inlet; 12. a pump cover; 13. a discharge pipe; 14. a seal member; 15. a balancing chamber; 16. a balance tube; 2. a helical centrifugal impeller; 21. an impeller hub; 22. an impeller cover plate; 3. an impeller shaft assembly; 4. a support tube assembly; 41. pipe distribution; 42. a guide bearing frame; 43. a guide bearing; 44. flushing the channel; 45. a return port; 5. mounting a plate; 6. a secondary impeller; 7. a bearing body; 71. a bearing cavity; 72. a thrust bearing; 73. a cooling chamber; 74. a coolant inlet; 75. a coolant outlet; 76. a bearing gland; 8. and (6) cooling the tube.

Detailed Description

The invention is described in further detail below with reference to the drawings and specific examples.

Fig. 1 to fig. 3 show the utility model discloses an embodiment of spiral centrifugal impeller long-axis pump, the spiral centrifugal impeller long-axis pump of this embodiment, including the pump body 1, spiral centrifugal impeller 2, impeller shaft subassembly 3, supporting tube subassembly 4 and

mounting panel

5, 1 one side of the pump body is equipped with sunction inlet 11, and relative opposite side is equipped with pump cover 12, and in 2 one end of spiral centrifugal impeller was located sunction inlet 11, the other end was located in the pump body 1, from sunction inlet 11 to the pump body 1, the diameter of spiral centrifugal impeller 2's blade increased gradually, and 3 one end of impeller shaft subassembly is connected with spiral centrifugal impeller 2, and during the mounting panel 5 was worn to locate by the other end, 3 peripheries of impeller shaft subassembly were located to the supporting tube subassembly 4 coaxial sleeve, and supporting tube subassembly 4 one end is connected with pump cover 12, and the other end is connected with mounting panel 5. Preferably, the pump body 1 is connected with the suction inlet 11 and the pump cover 12 by fasteners such as bolts, and the supporting pipe assembly 4 is connected with the mounting plate 5 by fasteners such as bolts, so that the assembly, disassembly and maintenance are convenient; the impeller shaft assembly 3 comprises a plurality of sections, and adjacent sections are connected through a sleeve coupler to transmit axial force and torque and effectively ensure the coaxiality of the sections; the impeller shaft component 3 is connected with the spiral centrifugal impeller 2 through a key to transmit power.

In the screw centrifugal impeller long-shaft pump, a pump body 1 and a pump cover 12 are connected to a mounting plate 5 through a supporting pipe assembly 4, and the weight of a unit is supported by the mounting plate 5; the spiral centrifugal impeller 2 is driven to rotate by the impeller shaft assembly 3, one end of the spiral centrifugal impeller 2 is positioned in the suction inlet 11, the other end of the spiral centrifugal impeller 2 is positioned in the pump body 1, the spiral centrifugal impeller 2 gradually increases in diameter of blades, a spiral flow channel can be formed, a large flow channel can be formed by a single blade or double blades, the overflowing performance is good, the blockage is not easy, a medium is pushed into the pump body 1 along the axis by utilizing the spiral characteristic, the spiral propelling effect is generated, the blades of the spiral centrifugal impeller 2 are similar to an axial flow type booster wheel, the good suction performance is achieved, the radius of the blades in the pump body 1 is large, the centrifugal effect is achieved, the axial thrust and centrifugal force are used for working, the unit has high extrusion capacity, the whole structure is simple and reliable, and the spiral centrifugal impeller can be suitable for mixed-phase conveying of solid content, high viscosity, long fibers and liquid-solid-gas.

Preferably, the spiral centrifugal impeller 2 is arranged on an impeller hub 21, the impeller shaft assembly 3 is connected with the impeller hub 21, the impeller hub 21 is of a conical structure, the cone angle is 30-70 degrees, and if a small value is selected for a pump with a higher rotation speed, a large value is selected on the contrary;

impeller inlet diameter D _j ，

Wherein,

K ₀ ＝4.8～6.0，D ₀ is the impeller inlet diameter, in units: mm; q is pump flow, unit: m is ³ H; n is the pump speed, unit: r/min; d _h Is the diameter of the impeller hub, unit: mm. If NPSHr pump K is required ₀ Selecting a large value, and otherwise, selecting a small value;

width b of outlet ₂ ＝(0.3～0.4)D _j ；

The wrap angle of the spiral centrifugal impeller 2 is 160-420 degrees, the large value is selected when a single-blade pump is used, and the small value is selected when a double-blade pump is used;

the outlet edge has an inclination angle D ₂ ，D ₂ ＝0°～23°；

The outlet angle is 10-22 degrees.

Further, in this embodiment, an impeller cover plate 22 is further disposed on the impeller hub 21. The impeller cover plate 22 can be matched with a blade with a larger diameter, which is positioned in the pump body 1, of the spiral centrifugal impeller 2, has a centrifugal effect, and further improves the centrifugal working capacity and the extrusion capacity of a unit.

Further, in the present embodiment, the pumping chamber of the pump body 1 has a spiral structure, the suction port 11 is disposed at the lower side of the pump body 1, the pump cover 12 is disposed at the upper side of the pump body 1, and the discharge pipe 13 is connected to the side surface of the pump body 1. The medium sucked into the pump body 1 can increase the pressure under the action of centrifugal force, so that the unit has higher output pressure.

Further, in this embodiment, the suction port 11 is of a trumpet structure so that the flow channel is matched with the outer diameter profile of the spiral centrifugal impeller 2, that is, the diameter of the suction port 11 is gradually increased along the flowing direction (from bottom to top) of the medium in the suction port 11, and the flow channel in the suction port 111 is matched with the spiral centrifugal impeller 2, thereby further improving the efficiency of the long-axis pump.

Further, in this embodiment, the impeller shaft assembly 3 is further provided with an auxiliary impeller 6, the inner side of the pump cover 12 is provided with a sealing cavity, the auxiliary impeller 6 is located in the sealing cavity, the auxiliary impeller 6 is located between the pump cover 12 and the spiral centrifugal impeller 2 along the axial direction, and a sealing member 14 (e.g., a sealing sleeve, etc.) is further arranged between the pump cover 12 and the impeller shaft assembly 3. The auxiliary impeller 6 is matched with the sealing element 14 to form a dynamic shaft sealing mode, and the sealing property between the impeller shaft assembly 3 and the pump cover 12 is ensured.

Further, in this embodiment, a balance cavity 15 is disposed outside the pump cover 12, the balance cavity 15 is connected to a balance pipe 16, and a distal end of the balance pipe 16 extends above a liquid level of the medium. This structure can make 2 imports of spiral centrifugal impeller and balance pump rotor axial force behind one's back under the atmospheric pressure effect, and balance tube 16 can also let the sealed a small amount of particle medium that leaks out after becoming invalid discharge simultaneously, avoids in particle medium upflow invades guide bearing 72, improves long-axis pump's reliability.

Further, in this embodiment, the supporting pipe assembly 4 includes a plurality of branch pipes 41, guide bearing frames 42 are respectively disposed between the pump cover 12 and the corresponding branch pipes 41 and between the adjacent branch pipes 41, and a guide bearing 43 is disposed between the guide bearing frame 42 and the impeller shaft assembly 3, so that the supporting pipe assembly 4 can form multi-point support for the impeller shaft assembly 3, which is beneficial to improving the rigidity of the impeller shaft assembly 3, reducing vibration, and ensuring coaxiality, and the guide bearing 43 may be made of polytetrafluoroethylene or silicon carbide; the mounting plate 5 is provided with a bearing body 7, the bearing body 7 is internally provided with a bearing cavity 71, the bearing cavity 71 is internally provided with a thrust bearing 72, the impeller shaft assembly 3 is arranged in the thrust bearing 72 in a penetrating way, and the axial force of the impeller shaft assembly 3 is borne through the thrust bearing 72, the bearing body 7 and the like, so that the long-shaft pump can stably and reliably run.

Furthermore, in this embodiment, the screw centrifugal impeller long-axis pump further includes a cooling pipe 8, the guide bearing frame 42 is provided with a flushing channel 44, the flushing channel 44 is connected with the cooling pipe 8, and the branch pipe 41 is provided with a return port 45; the bearing body 7 is provided with a cooling chamber 73 at the periphery of the bearing cavity 71, the cooling chamber 73 is provided with a cooling liquid inlet 74 and a cooling liquid outlet 75, and the cooling liquid inlet 74 is connected with the cooling pipe 8. On one hand, external washing liquid (such as water) can enter the washing channel 44 through the cooling pipe 8 to wash and lubricate the guide bearing 43, heat generated by friction between the guide bearing 43 and the impeller shaft assembly 3 is taken away, cooling of the guide bearing 43 is achieved, the service life is prolonged, the external washing liquid is timely discharged into a medium through the return port 45, the situation that the pressure in the branch pipe 41 is too high to invade the guide bearing 43 is avoided, and the structure is simple and reliable; outside flush fluid of on the other hand can get into cooling chamber 73 through coolant liquid import 74 in to cooling down bearing body 7, thrust bearing 72 etc. guarantees that bearing temperature rise and operating temperature are in reasonable scope, and the flush fluid after the heat absorption can be followed coolant liquid export 75 discharges, simple structure, rationally to guarantee that the long axis pump can reliably move for a long time.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a spiral centrifugal impeller long-axis pump which characterized in that: including the pump body (1), spiral centrifugal impeller (2), impeller shaft subassembly (3), supporting tube subassembly (4) and mounting panel (5), pump body (1) one side is equipped with sunction inlet (11), and relative opposite side is equipped with pump cover (12), spiral centrifugal impeller (2) one end is located in sunction inlet (11), the other end is located in the pump body (1), follow sunction inlet (11) extremely the pump body (1), the diameter of the blade of spiral centrifugal impeller (2) increases gradually, impeller shaft subassembly (3) one end with spiral centrifugal impeller (2) are connected, and the other end is worn to locate in mounting panel (5), supporting tube subassembly (4) coaxial cover is located impeller shaft subassembly (3) periphery, supporting tube subassembly (4) one end with pump cover (12) are connected, the other end with mounting panel (5) are connected.

2. The helical centrifugal impeller long shaft pump of claim 1, wherein: the wrap angle of the spiral centrifugal impeller (2) is 160-420 degrees, the inclination angle of the outlet edge is 0-23 degrees, and the outlet angle is 10-22 degrees.

3. The helical centrifugal impeller long axis pump of claim 1, wherein: the spiral centrifugal impeller (2) is arranged on an impeller hub (21), the impeller shaft assembly (3) is connected with the impeller hub (21), and the impeller hub (21) is of a conical structure and has a cone angle of 30-70 degrees.

4. The helical centrifugal impeller long axis pump of claim 3, wherein: and an impeller cover plate (22) is also arranged on the impeller hub (21).

5. The helical centrifugal impeller long axis pump of claim 1, wherein: the pumping chamber of the pump body (1) is of a spiral structure, the suction inlet (11) is arranged on the lower side of the pump body (1), the pump cover (12) is arranged on the upper side of the pump body (1), and the side surface of the pump body (1) is connected with the discharge pipe (13).

6. The helical centrifugal impeller long axis pump of claim 1, wherein: the suction inlet (11) is of a horn structure so that a flow channel is matched with the outer diameter profile of the spiral centrifugal impeller (2).

7. The helical centrifugal impeller long axis pump of any one of claims 1 to 6, wherein: still be equipped with auxiliary impeller (6) on impeller shaft subassembly (3), pump cover (12) inboard is equipped with the seal chamber, auxiliary impeller (6) are located the seal chamber, pump cover (12) with still be equipped with sealing member (14) between impeller shaft subassembly (3).

8. The helical centrifugal impeller long axis pump of any one of claims 1 to 6, wherein: the pump cover (12) outside is equipped with balanced chamber (15), balanced chamber (15) are connected with balanced pipe (16), balanced pipe (16) end extends to above the medium liquid level.

9. The helical centrifugal impeller long axis pump of any one of claims 1 to 6, wherein: the support pipe assembly (4) comprises a plurality of branch pipes (41), guide bearing frames (42) are arranged between the pump cover (12) and the corresponding branch pipes (41) and between the adjacent branch pipes (41), and guide bearings (43) are arranged between the guide bearing frames (42) and the impeller shaft assembly (3); be equipped with bearing body (7) on mounting panel (5), be equipped with bearing cavity (71) in bearing body (7), be equipped with thrust bearing (72) in bearing cavity (71), impeller shaft subassembly (3) are worn to locate in thrust bearing (72).

10. The helical centrifugal impeller long shaft pump of claim 9, wherein: the guide bearing frame (42) is provided with a flushing channel (44), the flushing channel (44) is connected with the cooling pipe (8), and the branch pipe (41) is provided with a return port (45); bearing body (7) in bearing chamber (71) periphery is equipped with cooling chamber (73), be equipped with coolant liquid import (74) and coolant liquid export (75) on cooling chamber (73), coolant liquid import (74) with cooling tube (8) are connected.