CN108223462B

CN108223462B - Pump for pumping impurities

Info

Publication number: CN108223462B
Application number: CN201611139265.5A
Authority: CN
Inventors: 周华东
Original assignee: Jiangsu Feiyue Pump Group Co ltd
Current assignee: JIANGSU FEIYUE PUMP GROUP Co.,Ltd.
Priority date: 2016-12-12
Filing date: 2016-12-12
Publication date: 2020-11-10
Anticipated expiration: 2036-12-12
Also published as: CN108223462A

Abstract

The invention discloses a pump for pumping impurity media, which comprises a pump body, a pump cover, an impeller and a pump shaft, wherein the pump cover, the impeller and the pump shaft are installed on the pump body, the pump body and the pump cover form a pump cavity, the pump shaft penetrates through the pump cover and extends into the pump cavity to be provided with the impeller, the pump is characterized in that a sealing cavity is arranged between the pump shaft and the pump cover, a mechanical seal is installed in the sealing cavity, a power impeller is arranged on the end surface, close to the impeller, of the mechanical seal, an annular groove is arranged on the inner wall of a through hole, in which the pump shaft is installed on the pump cover, the annular groove is arranged between the impeller and the mechanical seal. The technical purpose of the invention is to provide a pump for pumping impurity media, which has more reliable sealing and longer service life.

Description

Pump for pumping impurities

Technical Field

The invention relates to the field of fluid conveying devices, in particular to a pump for pumping impurity media.

Background

In petrochemical plants, fluid transfer devices for the transfer of media containing impurities, such as the transfer of water from depressions, and the transfer of sewage, are required. However, the equipment applied to the petroleum equipment must work reliably in places with severe environment and large temperature difference. The existing impurity pumping pump is easy to damage in sealing, if the sealing is replaced after being damaged, the pump stops running, and the replacement cost of mechanical sealing is high, so that the production cost is increased.

Disclosure of Invention

In view of the above-mentioned problems, it is an object of the present invention to provide a pump for pumping a foreign substance medium, which has a more reliable seal and a longer service life.

The invention is realized by the following technical scheme:

the invention discloses a pump for pumping impurity media, which comprises a pump body, a pump cover, an impeller and a pump shaft, wherein the pump cover, the impeller and the pump shaft are installed on the pump body, the pump body and the pump cover form a pump cavity, the pump shaft penetrates through the pump cover and extends into the pump cavity to be provided with the impeller, the pump is characterized in that a sealing cavity is arranged between the pump shaft and the pump cover, a mechanical seal is installed in the sealing cavity, the end surface of the mechanical seal, which is close to the impeller, is provided with a power impeller, the inner wall of a through hole for installing the pump shaft on the pump cover is provided with an annular groove, the annular groove is arranged between the impeller and the mechanical.

According to the pump for pumping the impurity medium, the end face, close to the impeller, of the filtering component is attached with the quality removing impeller capable of scraping impurities of the filtering component, and the quality removing impeller is an open impeller.

The pump for pumping the impurity medium is characterized in that the guide pipe is provided with a one-way valve for limiting the medium to flow from the inlet of the pump to the sealed cavity.

The pump for pumping the impurity medium is characterized in that at least two flow guide holes are symmetrically arranged on the impeller hub in the center, and the flow guide holes enable a cavity formed by the impeller and the pump cover to be communicated with a liquid inlet of the pump body.

According to the pump for pumping the impurity medium, the cylindrical surface in the sealing cavity is provided with the vortex groove, and the bottom of the vortex groove is communicated with the flow guide pipe.

The pump for pumping the impurity medium comprises a filter layer, a support ring and a sealing ring, wherein the medium can axially flow through the support ring, the filter layer is arranged on the end face, close to the impeller, of the support ring, at least one sealing groove is formed in the cylindrical surface of the inner ring of the support ring, and the sealing ring is arranged in the sealing groove.

According to the pump for pumping the impurity medium, the part of the sealing ring, which is in contact with the pump shaft, is of a lip-shaped structure.

The pump for pumping the impurity medium is characterized in that the filter layer is a stainless steel filter screen.

The pump for pumping the impurity medium is characterized in that the vortex groove is arranged behind an impeller outlet of the power impeller, and comprises a conical part gradually enlarged from the outlet end of the power impeller and a rotary groove arranged at the tail end of the conical part.

The invention has the beneficial effects that:

through be equipped with filter element between pump cover and pump shaft, and install with the filter element cooperation and remove matter impeller, thereby can reduce impurity and flow to mechanical seal's seal chamber, and can be when there is impurity at filter element's surface area through removing matter impeller's rotation, through the effect of removing matter impeller, avoid impurity to pile up on filter element all the time, and through locating the water conservancy diversion hole on wheel hub, arrange impurity in the import department of impeller, through locating the power impeller in the seal chamber, can make the import of medium flow direction pump body in from the seal chamber, and can take away the granule that contains impurity, reduce impurity to mechanical seal's influence greatly, thereby improve mechanical seal's live time, improve the reliability of pump.

Drawings

FIG. 1 is a schematic diagram of a pump;

fig. 2 is a structural view of the filter element.

The labels in the figure are: 1 is mechanical seal, 2 is filter component, 201 is filter layer, 202 is support ring, 203 is seal ring, 3 is mass-removing impeller, 4 is power impeller, 5 is flow guide hole, 6 is pump body, 7 is pump cover, 8 is flow guide pipe, 9 is impeller, 10 is pump shaft, 11 is vortex groove, 1101 is conical part, 1102 is convolution groove.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

The pump for pumping impurity media, as shown in fig. 1 and fig. 2, comprises a pump body 6, a pump cover 7 mounted on the pump body 6, an impeller 9 and a pump shaft 10, wherein the pump body 6 and the pump cover 7 form a pump cavity, and the pump shaft penetrates through the pump cover 7 and extends into the pump cavity to be mounted with the impeller 9, and is characterized in that a seal cavity is arranged between the pump shaft 10 and the pump cover 7, a mechanical seal 1 is mounted in the seal cavity, a power impeller 4 is arranged on the end surface of the mechanical seal 1, which is close to the impeller, an annular groove is arranged on the inner wall of a through hole for mounting the pump shaft 10 on the pump cover 7, the annular groove is arranged between the impeller 9 and the mechanical seal 1, a filter part 2 is arranged in the annular groove, a guide.

The end face of the filtering component 2 close to the impeller 9 is attached with a quality removing impeller 3 which can scrape impurities of the filtering component 2, and the quality removing impeller 3 is an open impeller. The quality removing impeller 3 is an open impeller, the impeller rotates to generate fluid power, impurities on the surface of the filtering component 2 can be sent out of a cavity between the pump shaft and the pump cover, and therefore the medium flows to the diversion hole 5 and flows to the inlet of the impeller from the diversion hole 5 along with the fluid.

Be equipped with the check valve that restricts the medium and flow to the seal chamber from the pump import on the honeycomb duct 8, through the check valve that is equipped with, can avoid the medium water conservancy diversion, avoid containing the medium direct inflow of impurity in the seal chamber, and damage mechanical seal.

The impeller 9 is characterized in that at least two flow guide holes 5 are symmetrically arranged on the hub of the impeller 9 in the center, the flow guide holes 5 enable the impeller and the pump cover to form a cavity to be communicated with a liquid inlet of the pump body, the two flow guide holes 5 which are symmetrically arranged in the center can be arranged on the hub of the impeller, the situation that in the prior art, due to holes in a rear cover plate of the impeller, fluid is uneven and vibration is caused can be avoided, the impeller 9 can run more reliably due to the arrangement of the flow guide holes, and vibration and noise can be reduced.

The inner cylindrical surface of the sealing cavity is provided with a vortex groove 11, and the bottom of the vortex groove 11 is communicated with the flow guide pipe 8. The fluid containing impurities can form rotary fluid through the power impeller 4 through the arranged vortex groove 11, the fluid rotates at the position where the impurities basically cannot flow to the mechanical seal in the vortex groove 11, and the impurities flow out through the flow guide pipe 8 arranged at the bottom of the vortex groove 11, so that the damage of the impurities to the mechanical seal is further avoided, and the mechanical seal is protected.

The filter element 2 comprises a filter layer 201, a support ring 202 and a seal ring 203, wherein media can axially flow through the support ring 202, the filter layer 201 is arranged on the end face, close to the impeller 9, of the support ring 202, at least one seal groove is formed in the cylindrical surface of the inner ring of the support ring 202, and the seal ring 203 is arranged in the seal groove. The part of sealing washer 203 and pump shaft contact is established to lip structure, and lip structure can make the contact of sealing washer and pump shaft inseparabler, and the reliability is higher. The filter layer 201 is a stainless steel filter screen.

The vortex groove 11 is arranged behind an impeller outlet of the power impeller 4, the rotation of the power impeller 4 can generate a centrifugal vortex fluid, and the vortex groove 11 comprises a conical part 1101 gradually enlarged from an impeller outlet end of the power impeller 4 and a rotary groove 1102 arranged at the tail end of the conical part 1101. Impurities in the vortex-shaped fluid formed by the power impeller 4 can be better collected through the provided conical part 1101 and discharged through the draft tube 8 connected with the provided spiral groove 1102, so that the contact of the impurities with the sealing device is greatly reduced, and the mechanical seal is better protected.

Claims

1. A pump for pumping impurity medium comprises a pump body (6), a pump cover (7) arranged on the pump body (6), an impeller (9) and a pump shaft (10), the pump body (6) and the pump cover (7) form a pump cavity, the pump shaft penetrates through the pump cover (7) and extends into the pump cavity to be provided with an impeller (9), it is characterized in that a sealing cavity is arranged between the pump shaft (10) and the pump cover (7), a mechanical seal (1) is arranged in the seal cavity, a power impeller (4) is arranged on the end surface of the mechanical seal (1) close to the impeller, an annular groove is arranged on the inner wall of a through hole of a pump cover (7) for installing a pump shaft (10), the annular groove is arranged between an impeller (9) and a mechanical seal (1), a filtering component (2) is arranged in the annular groove, a diversion pipe (8) with one end communicated with the sealing cavity and the other end communicated with the liquid inlet cavity of the pump body (6) is arranged on the pump cover (7); the end face, close to the impeller (9), of the filtering component (2) is attached with a quality-removing impeller (3) which can scrape impurities of the filtering component (2), and the quality-removing impeller (3) is an open impeller; an eddy current groove (11) is arranged on the inner cylindrical surface of the sealing cavity, and the bottom of the eddy current groove (11) is communicated with the flow guide pipe (8); the vortex groove (11) is arranged behind an impeller outlet of the power impeller (4), and the vortex groove (11) comprises a conical part (1101) gradually enlarged from the impeller outlet end of the power impeller (4) and a convolution groove (1102) arranged at the tail end of the conical part (1101).

2. Pump for pumping impurity media according to claim 1, characterized in that the flow guide (8) is provided with a one-way valve limiting the flow of the media from the pump inlet to the sealed chamber.

3. The pump for pumping impurity medium according to claim 1, wherein the impeller (9) has at least two flow guide holes (5) in the hub, and the flow guide holes (5) connect the cavity formed by the impeller and the pump cover with the liquid inlet of the pump body.

4. The pump for pumping impurity media according to claim 1, wherein the filter element (2) comprises a filter layer (201), a support ring (202) through which the media can flow axially, and a sealing ring (203), the filter layer (201) is disposed on an end surface of the support ring (202) close to the impeller (9), at least one sealing groove is disposed on a cylindrical surface of an inner ring of the support ring (202), and the sealing ring (203) is disposed in the sealing groove.

5. Pump for pumping impurity medium according to claim 4, characterized in that the portion of the sealing ring (203) in contact with the pump shaft is provided with a lip-shaped structure.

6. Pump for pumping impurity medium according to claim 4, characterized in that the filter layer (201) is a stainless steel screen.