CN219197643U

CN219197643U - Pressure centrifugal pump of filter press

Info

Publication number: CN219197643U
Application number: CN202320041466.0U
Authority: CN
Inventors: 蒋凌超; 蒋龙福; 郭丹枫
Original assignee: Yixing Zeus Pump Manufacture Co ltd
Current assignee: Yixing Zeus Pump Manufacture Co ltd
Priority date: 2023-01-06
Filing date: 2023-01-06
Publication date: 2023-06-16
Anticipated expiration: 2033-01-06

Abstract

The utility model discloses a pressure filter pressurizing centrifugal pump which comprises a main shaft, a shaft seal, a suction inlet tee joint, a pump shell and a pump cover, wherein the shaft seal is arranged on the main shaft, the suction inlet tee joint is connected with the pump cover, the shaft seal is positioned at one end in the suction inlet tee joint, the pump cover is positioned at one end of the suction inlet tee joint far away from the shaft seal, the pump shell is arranged at the end part of the main shaft and is positioned at one side of the pump cover far away from the suction inlet tee joint, an impeller positioned in the pump shell is arranged at the end part of the main shaft, the impeller comprises a web, a plurality of blades and a plurality of pressurizing blades, the center of the web is provided with a center hole, the blades are arranged at the front surface of the web and are uniformly distributed at intervals along the circumferential direction of the web, and the pressurizing blades are arranged at the back surface of the web. In the utility model, the front and the back of the web are respectively provided with the blades and the supercharging blades, and the two sides of the impeller do work and supercharge, so that the fluid pressure at the two sides of the impeller are relatively balanced, the axial pressure of the main shaft is eliminated, and the bearing is protected.

Description

Pressure centrifugal pump of filter press

Technical Field

The utility model relates to the field of centrifugal pumps, in particular to a pressure filter pressurizing centrifugal pump.

Background

The side suction type centrifugal pump is a centrifugal pump for pressurized feeding of a common filter press, and has the advantages that a feed inlet of the pump is arranged at a shaft sealing part at the shaft side, and the shaft seal is arranged at a low-pressure part of fluid, so that the mechanical seal is not easy to damage. Therefore, when the pressure is applied to the filter press, the mechanical seal is not easy to damage, and the side suction centrifugal pump becomes a common matched pump of the filter press.

However, the pressure feed pump of the side-suction filter press still has the following defects:

firstly, the axial force is excessively changed in two poles, so that the bearing is damaged: in twenty minutes at the initial stage of feeding of the filter press, the pump operates at a stage of high flow and low pressure, the pump inlet part is in an extremely high negative pressure state, and the impeller working surface of the pump is in a high negative pressure area, so that the impeller drives the main shaft and generates axial tension along the direction of the motor, the main shaft of the pump generates axial force along the direction of the motor, and the bearing is damaged;

in the later stage of feeding and pressurizing the filter press by the pump, the working face of the impeller is in a high pressure state due to the high pressure of the liquid outlet of the pump, so that the impeller is pulled in the opposite direction of the motor as a whole, the main shaft of the pump moves back to the motor, and the forward movement force of the main shaft can damage the bearing. In the cycle flow of the pressurizing operation of the plate frame, each cycle from slurry filling (low-pressure operation) to forced-pressure operation can lead the axial direction of the pump to be changed into back-to-motor-end movement after the axial direction of the pump is moved from the motor-end movement, so that the bearings of the pump are easy to damage.

Secondly, the impeller does not work sufficiently, and the pump efficiency is low: the reason is that in order to balance the axial force, only the back blade is arranged on the back of the impeller to reduce the pressure of the back of the impeller, so that the purpose of balancing part of the axial force is achieved. However, the method for reducing the axial force by arranging the back vane can lead the pump to consume about 5-10% of power more, so that the operation efficiency of the pump is reduced. Therefore, the efficiency of the side suction type filter press feed centrifugal pump is lower than that of the front suction type centrifugal pump.

Disclosure of Invention

The utility model aims to provide a pressure centrifugal pump of a filter press.

The utility model has the innovation points that the front and the back of the web are respectively provided with the blades and the supercharging blades, and the two sides of the impeller do work and supercharge, so that the fluid pressure at the two sides of the impeller are relatively balanced, the axial pressure of the main shaft is eliminated, and the bearing is protected.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a pressure filter pressurization centrifugal pump, includes main shaft, shaft seal, suction inlet tee bend, pump case, pump cover, shaft seal sets up on the main shaft, suction inlet tee bend is connected with the pump cover, shaft seal is located the one end of suction inlet tee bend, the pump cover is located the one end that the suction inlet tee bend kept away from shaft seal, the pump case sets up at the main shaft tip and is located one side that the suction inlet tee bend was kept away from to the pump cover, be provided with the impeller that is located the pump case on the tip of main shaft, the impeller includes web, a plurality of blade and a plurality of booster blade, the center of web is provided with the centre bore, and a plurality of blades set up in the front of web, evenly distributed along the circumference of web, and a plurality of booster blade set up the back at the web. The front and back sides of the web are respectively provided with the blades and the supercharging blades, and the two sides of the impeller do work and supercharge, so that the fluid pressure at the two sides of the impeller are relatively balanced, the axial pressure of the main shaft is eliminated, and the bearing is protected.

Preferably, the supercharging blades are evenly spaced apart about the circumference of the web and are arranged radially of the web.

Preferably, the web is provided with at least one fluid passage hole near the hub, and the fluid passage holes communicate the front surface and the back surface of the web. The liquid through holes are arranged, so that fluid at the suction inlet of the pump enters the back of the impeller through the liquid through holes, and the liquid is sent into the pump volute cavity under the centrifugal force action of the impeller supercharging blades, so that the effect of acting and conveying the liquid is achieved.

Preferably, the liquid through hole is an inclined hole. The inclined holes are arranged along the water flow direction, so that the liquid can flow through the liquid through holes conveniently.

Preferably, the back surface of the web is provided with a liquid passage ring groove communicated with the liquid passage hole. The liquid through ring groove is arranged, so that the outlet of the liquid through hole is enlarged, liquid in the liquid through hole enters the back surface of the impeller, more liquid is sent into the pump volute cavity through the supercharging blade, work is done more fully by the supercharging blade, and the operation efficiency of the pump is improved.

Preferably, the impeller is made of ceramic.

Preferably, the impeller is made of a mixture of resin and mineral.

The beneficial effects of the utility model are as follows:

1. the front and back sides of the web are respectively provided with the blades and the supercharging blades, and the two sides of the impeller do work and supercharge, so that the fluid pressures at the two sides of the impeller are relatively balanced, the axial pressure of the main shaft is eliminated, and the bearing is protected; the arrangement of the liquid through holes can lead the fluid at the suction inlet to be two-way when the pump works: one path of the working fluid is output through the blade on the front surface of the impeller; the other path enters the back of the impeller through the liquid through hole and is output by the work done by the booster blade, so that the two sides of the impeller do work to convey liquid, the axial force can be balanced, the impeller can do work fully, and the efficiency of the pump is improved.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1.

Fig. 2 is a schematic structural view of the impeller.

Fig. 3 is a schematic structural view of the supercharging blade.

Fig. 4 is a schematic structural diagram of embodiment 2.

Fig. 5 is a schematic structural view of the liquid-passing ring groove.

Fig. 6 is a schematic diagram of the structure of the inclined hole of example 3.

Fig. 7 is a schematic structural diagram of a centrifugal pump in direct connection with embodiment 4.

Fig. 8 is a schematic structural view of a vertical centrifugal pump of embodiment 5.

In the figure:

1. a main shaft; 2. shaft sealing; 3. a suction inlet tee joint; 4. a pump housing; 5. a pump cover; 6. an impeller; 61. a web; 62. a blade; 63. a supercharging blade; 64. a central bore; 65. a metal embedded part; 7. a liquid through hole; 8. a liquid-passing ring groove; 9. and (3) a bearing.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

The described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

As shown in fig. 1, the pressure centrifugal pump of the filter press comprises a main shaft 1, a shaft seal 2 arranged on the main shaft 1, a suction inlet tee joint 3 arranged on the shaft seal 2, wherein the shaft seal 2 is positioned at one end of the suction inlet tee joint 3, a pump cover 5 connected with the suction inlet tee joint 3 through screws, an outer pump shell 4 arranged at the end part of the main shaft 1 and an impeller 6 arranged at the end part of the main shaft 1, the impeller 6 is positioned between the pump cover 5 and the pump shell 4, and the impeller 6 is an open impeller; the impeller 6 is made of ceramic or a mixture of resin and mineral.

As shown in fig. 2 and 3, the impeller 6 includes a web 61, a plurality of blades 62, and a plurality of supercharging blades 63, the center of the web 61 is provided with a center hole 64 adapted to mount the spindle 1, and the plurality of blades 62 are uniformly spaced apart along the circumferential direction of the web 61 and are located on the front surface of the web 61; a plurality of supercharging blades 63 are uniformly spaced apart in the circumferential direction of the web 61 and are located on the opposite side of the web 61, each supercharging blade 63 being arranged in the radial direction of the web 61; a metal embedment 65 is provided in the web 61 of the impeller 6 to increase the torsion resistance of the impeller 6.

As shown in fig. 2 and 3, at least one liquid through hole 7 near the center hole 64 is provided in the web 61, the liquid through holes 7 communicate the front and back surfaces of the

web

61, 5 liquid through holes 7 are provided, and the liquid through holes 7 are uniformly spaced apart in the circumferential direction of the web 61.

Example 2

As shown in fig. 4 and 5, the difference from embodiment 1 is that the back surface of the web 61 is provided with liquid passage ring grooves 8 communicating with the liquid passage holes 7.

Example 3

As shown in fig. 6, the difference from embodiment 1 is that the liquid passage hole 7 is an inclined hole.

Example 4

As shown in fig. 7, the difference from embodiment 1 is that the centrifugal pump is a direct-connection centrifugal pump using a bearingless bracket.

Example 5

As shown in fig. 8, the difference from embodiment 1 is that the centrifugal pump is a vertical centrifugal pump.

Claims

1. The utility model provides a pressure filter pressurization centrifugal pump, includes main shaft, shaft seal, suction inlet tee bend, pump case, pump cover, the shaft seal sets up on the main shaft, suction inlet tee bend is connected with the pump cover, the shaft seal is located the one end in the suction inlet tee bend, the pump cover is located the one end that the suction inlet tee bend kept away from the shaft seal, the pump case sets up outside the main shaft tip and is located the one side that the pump cover kept away from the suction inlet tee bend, its characterized in that,

the impeller comprises a web, a plurality of blades and a plurality of supercharging blades, wherein a center hole is formed in the center of the web, the blades are arranged on the front face of the web and uniformly distributed at intervals along the circumferential direction of the web, and the supercharging blades are arranged on the back face of the web.

2. A filter press pressurizing centrifugal pump according to claim 1, wherein,

the supercharging blades are evenly spaced about the circumference of the web and are arranged radially of the web.

3. A filter press pressurizing centrifugal pump according to claim 2, wherein,

the web is provided with at least one liquid through hole close to the central hole, and the liquid through hole is communicated with the front surface and the back surface of the web.

4. A filter press pressurizing centrifugal pump according to claim 3, wherein,

the liquid through holes are inclined holes.

5. A filter press pressurizing centrifugal pump according to claim 3, wherein,

the back of the web plate is provided with a liquid through ring groove communicated with the liquid through hole.

6. A filter press pressurizing centrifugal pump according to claim 1, wherein,

the impeller is made of ceramic.

7. A filter press pressurizing centrifugal pump according to claim 1, wherein,

the impeller is made of a mixture of resin and minerals.