KR101400161B1 - A liner for sewage pump - Google Patents

A liner for sewage pump Download PDF

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Publication number
KR101400161B1
KR101400161B1 KR1020140017368A KR20140017368A KR101400161B1 KR 101400161 B1 KR101400161 B1 KR 101400161B1 KR 1020140017368 A KR1020140017368 A KR 1020140017368A KR 20140017368 A KR20140017368 A KR 20140017368A KR 101400161 B1 KR101400161 B1 KR 101400161B1
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KR
South Korea
Prior art keywords
impeller
main body
liner
fluid
flow path
Prior art date
Application number
KR1020140017368A
Other languages
Korean (ko)
Inventor
김윤성
조재천
Original Assignee
하지공업(주)
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Filing date
Publication date
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Priority to KR1020140017368A priority Critical patent/KR101400161B1/en
Application granted granted Critical
Publication of KR101400161B1 publication Critical patent/KR101400161B1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/406—Casings; Connections of working fluid especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2210/00—Working fluids
    • F05D2210/10—Kind or type
    • F05D2210/11—Kind or type liquid, i.e. incompressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/60—Fluid transfer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

Abstract

The present invention relates to a liner for a sewage pump which prevents foreign substances from getting jammed between a casing and an impeller by a recirculation phenomenon of recirculating a fluid discharged by the impeller. The liner according to an embodiment of the present invention is installed between the casing and the impeller is to prevent the foreign substances from getting jammed due to the recirculation phenomenon. The liner includes a disk-shaped body with a through-hole at a center portion through which a fluid fed through an inlet port of the casing passes; and a channel formed on the outer surface of the body in a diameter direction of the body to discharge the fluid fed through the inlet port to the outer circumference of the body through the body. Therefore, it is possible to prevent the recirculation phenomenon from happening, and minimize generation of maintenance costs by extending lifespan, as well as improving the efficiency of the sewage pump.

Description

A liner for sewage pump

The present invention relates to a liner for a wastewater pump that prevents foreign matter from being caught between an impeller and a casing due to a recirculation phenomenon in which a fluid discharged by an impeller is recirculated.

Generally, the wastewater pump is divided into a volute pump and a centrifugal pump. In the case of a volute pump, centrifugal pumps are used where high lifting is required, although the structure is such that slurry and other foreign substances are immediately discharged from the structure.

However, due to the structure of the centrifugal pump, when the fluid is discharged from the impeller, a recirculation phenomenon occurs in which the fluid flows into the casing and the impeller again, so that the slurry contained in the fluid is fixed between the casing and the impeller, There is a problem that the efficiency of the centrifugal pump is lowered.

In order to solve such a problem, conventionally, Korean Patent Registration No. 10-0192116 (published on June 15, 1999) discloses a "liner for a pump ".

Conventional pump liner rings include a housing provided in a casing body; A sliding member provided in the housing in such a manner as to provide a predetermined gap in the radial direction between the impeller and the impeller; And an elastic member provided between the slide member and the housing.

In the conventional liner ring for a pump having the above-described structure, a sliding member and an elastic member are inserted between the housing and the impeller to prevent a recirculation phenomenon in which fluid is re-introduced between the housing and the impeller, .

However, in the conventional pump liner ring, wear is easily caused by the rotating impeller, and the life span is short, and the maintenance cost due to frequent replacement is increased.

Further, since the impeller is coupled to rotate inside the slide member, the impeller and the casing can not be completely airtight, and thus the function of preventing the recirculation phenomenon is small.

SUMMARY OF THE INVENTION The present invention has been devised to solve the problems as described above, and it is an object of the present invention to prevent a recirculation phenomenon occurring between an impeller and a housing, And to provide a liner for a wastewater pump which can minimize wear and tear and prolong life and at the same time minimize maintenance costs.

According to an aspect of the present invention, there is provided a liner for a wastewater pump which is disposed between a casing and an impeller to prevent foreign matter from being trapped by a recirculation phenomenon, And a through hole through which the fluid flowing through the inlet port of the casing is formed is formed in a central portion of the main body, and a body is formed in the center of the main body in a radial direction of the main body so that fluid, And a flow path formed on an outer surface of the main body.

And an inflow guide portion extending from the through-hole so as to be exposed to the inflow port and guiding a part of the fluid flowing into the inflow port to the inflow port.

The inflow guide portion may include an inflow slope that is inclined from the end of the protruded portion of the inflow port toward the inflow port so that the inflow guide portion may protrude from the inflow port and flow into the inflow port.

The inflow slope may be formed as a concave curved surface inward.

And a discharge guide portion that extends further outward than the surface of the impeller facing the main body at the outer periphery of the main body to guide the fluid introduced into the gap between the impeller and the casing by the recirculation phenomenon, can do.

The discharge guide portion may include a discharge slope surface inclined in a direction in which the impeller is positioned at an outer end of a surface facing the casing.

The discharge inclined surface may be formed as a concave curved surface inward.

The flow path may be formed in a curved shape bent in a direction in which the impeller rotates so that the fluid flowing into the flow path can easily flow, and a plurality of the flow paths may be formed radially around the center of the body.

The flow path may be formed to have a smaller area from the through hole toward the outer end of the main body so as to increase the pressure when the fluid is discharged to the outer periphery of the main body.

According to the present invention, the flow path for discharging the fluid to the wick-air pump liner is formed to prevent the recirculation phenomenon, and the fluid passing through the flow path performs the lubrication action to minimize the wear, thereby extending the life of the liner for the wastewater pump As a result, the maintenance cost for replacement can be minimized.

Further, the fluid passing through the flow path lubricates, thereby improving the efficiency of the wastewater pump and minimizing the power during initial startup.

In addition, the inflow guide portion is provided to easily supply the fluid to the flow path, and even if the recirculation occurs, the fluid is again moved in the direction in which the fluid is discharged from the impeller by the discharge guide portion, It is possible to prevent sticking.

Further, the area of the flow path is formed so as to gradually decrease toward the outer periphery, and the fluid is discharged at a high pressure, thereby minimizing the occurrence of the recirculation phenomenon.

1 is a cross-sectional view schematically showing a state in which a liner for a wastewater pump according to an embodiment of the present invention is installed in an wastewater pump.
2 is a plan view showing a liner for a wastewater pump according to an embodiment of the present invention.
3 is a bottom view showing a liner for a wastewater pump according to an embodiment of the present invention.
4 is a schematic cross-sectional view taken along the line AA in Fig.
Fig. 5 is an enlarged view of the "A" portion of Fig. 1, showing the flow of the fluid.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1, the liner 100 for a wastewater pump according to the present invention is installed between a portion of a casing 210 having an inlet 211 through which a fluid flows in a centrifugal pump and an impeller 230, It is possible to prevent the slurry contained in the fluid from sticking between the impeller 230 and the casing 210 due to the recirculation phenomenon (the reference numeral 250 is a motor for rotating the impeller 230) .

Here, the phenomenon of recirculation refers to a phenomenon in which the fluid discharged by the impeller 230 rotates in the opposite direction when the impeller 230 rotates and flows into the space between the impeller 230 and the casing 210.

2 to 4, the liner 100 for an wastewater pump according to an embodiment of the present invention may include a main body 110.

The main body 110 may be formed in a disc shape, and a through hole 111 may be formed at the center of the disc shape to allow the fluid flowing into the inlet 211 to pass therethrough.

The through hole 111 formed in the main body 110 may be formed to have a diameter equal to or smaller than the diameter D2 of the inlet 211 and the outer diameter of the main body 110 may be smaller than the diameter D2 of the main body 110, And may be formed to have a diameter equal to or larger than the diameter D1 of the opposed impeller 230. [

The liner 100 for an wastewater pump according to an embodiment of the present invention may include a flow path 113.

The flow passage 113 can discharge a part of the fluid flowing into the inlet port 211 of the casing 210 to the outer circumference of the main body 110 through the main body 110 by the suction force of the impeller 230.

The flow path 113 may be formed in the radial direction of the main body 110 so as to be connected to the outer surface of the main body 110 from the through hole 111 to the outer surface of the main body 110.

At this time, the flow path 113 is formed on the outer surface of the main body 110, that is, the surface on which the main body 110 faces the impeller 230, or the surface on which the main body 110 faces the casing 210 or both .

The flow path 113 may be formed in a curved shape curved in the rotating direction of the impeller 230 so that the fluid passing through the flow path 113 can be easily discharged to the impeller 230 without being resisted by rotation, A plurality of the flow paths 113 may be radially formed around the through holes 111 of the main body 110.

2 to 4, the liner 100 for an wastewater pump according to an embodiment of the present invention may include an inlet guide unit 130.

The inflow guide portion 130 can supply a part of the fluid flowing into the inflow hole to the flow path 113.

The inlet guide 130 may protrude toward the center of the through hole 111 from the inner circumferential surface of the through hole 111 so as to be exposed to the inlet 211 when the inlet 211 is viewed.

The inlet guide part 130 protrudes from the through hole 111 so as to be exposed to the inlet 211 so that a part of the fluid flowing into the inlet 211 hits the inlet guide part 130, The movement of the fluid can be guided.

Here, when the through-hole 111 of the main body 110 is formed to have a diameter smaller than the diameter D2 of the inlet 211, the inlet guide portion 130 is formed so that a portion exposed to the inlet 211 is formed in the inlet guide portion 130).

The inlet guide 130 may include an inlet slope 131.

This inflow slope can guide the fluid that strikes the inflow guide portion 130 to the flow path 113.

The inflow slope 131 may be inclined so that the height of the inflow slope 131 increases from the bottom of the flow passage 113 toward the center of the through hole 111.

That is, the inflow slope 131 may be formed in an inclined shape so that fluid may be injected into the flow path 113 at a portion where the through hole 111 is formed.

At this time, the inflow slope 131 may be formed as a curved surface that is concave inward so that the fluid smoothly flows into the flow path 113.

2 to 4, the liner 100 for an wastewater pump according to an embodiment of the present invention may include a discharge guide portion 150. [

The discharge guide unit 150 discharges the fluid flowing between the impeller 230 and the casing 210 by the recirculation phenomenon generated by the discharged fluid of the impeller 230, In the direction of the arrow.

Meanwhile, the discharge guide portion 150 may be provided on the outer circumference of the main body 110. [ The diameter D1 of the impeller 230 is larger than the diameter D1 of the impeller 230 when the diameter of the main body 110 is larger than the diameter D1 of the impeller 230, The diameter of the surface of the impeller 230 facing the impeller 230.

In addition, the discharge guide portion 150 may include the discharge slope 151.

The discharge slope 151 is formed such that the end of the surface of the main body 110 facing the casing 210 protrudes more than the end of the surface of the portion facing the impeller 230, As shown in FIG.

That is, the discharge inclined surface 151 is guided by the discharge inclined surface 151 to the portion where the fluid flowing between the impeller 230 and the casing 210 is discharged by the recirculation phenomenon, The lower surface of the main body 110 may be longer than the upper surface of the main body 110, and the upper surface and the lower surface of the main body 110 may be connected to each other.

At this time, the discharge slope 151 may be formed as a concave curved surface inwardly so that the fluid can smoothly be guided to a portion where the fluid of the impeller 230 is discharged.

The operation and effect between the above-described respective constitutions will be described.

The liner 100 for a wastewater pump according to an embodiment of the present invention is characterized in that a plurality of flow paths 113 are radially provided in a main body 110 of a circular plate shape and an inlet 211 of the casing 210 is formed at the center of the main body 110 Through which the fluid flowing into the through hole 111 passes.

An inlet guide part 130 is provided at an inner periphery of the main body 110 so as to guide the fluid introduced into the inlet 211 into the flow path 113 by being protruded inward from the through hole 111, A discharge guide portion 150 for guiding the fluid flowing between the impeller 230 and the casing 210 to move to the portion where the fluid of the impeller 230 is discharged again due to the recirculation phenomenon, .

The liner 100 for the wastewater pump thus constructed is installed to be seated between the portion where the inlet 211 is formed in the casing 210 and the impeller 230. At this time, the main body 110 is positioned so that the discharge slope 151 of the discharge guide portion 150 is inclined from the casing 210 toward the impeller 230, and the casing 210 is seated between the casing 210 and the impeller 230 do.

When the wastewater pump 200 is started and the impeller 230 rotates, the fluid is introduced into the inlet 211 of the casing 210 by the impeller 230, Through the through hole 111 of the casing 210 by the impeller 230.

5, when the fluid flows into the inlet 211, the inlet guide portion 130 is exposed to the inlet 211, so that a part of the fluid passing through the inlet 211 flows into the inlet guide portion 130 and the fluid impinging on the inlet guide 130 is supplied to the flow passage 113 along the inflow slope 131.

The fluid supplied to the flow path 113 is discharged to the outer circumference of the main body 110 along the flow path 113. Since the area of the flow path 113 becomes smaller toward the outer periphery of the main body 110, So that the recirculation phenomenon can be prevented.

Since the discharge guide portion 150 is provided around the outer circumference of the main body 110, even if a recirculation phenomenon occurs, it is possible to prevent the recirculation phenomenon from being generated between the impeller 230 and the casing 210 due to the recirculation phenomenon The fluid is guided along the discharge slope 151 of the discharge guide portion 150 in the direction in which the fluid is discharged from the impeller 230.

The fluid is again moved in the direction in which the fluid is discharged from the impeller 230 by the discharge slope 151 so that the slurry can be prevented from flowing between the impeller 230 and the casing 210 to be fixed.

The fluid passing through the flow path 113 performs lubricating action between the surface of the casing 210 opposed to the surface of the main body 110 on which the flow path 113 is formed or the surface of the impeller 230, The life of the liner 100 can be prolonged.

Therefore, the liner 100 for wastewater pump according to the embodiment of the present invention forcibly discharges part of the fluid flowing into the inlet 211 of the casing 210 through the inlet 113 by way of the inlet guide 130 It is possible to prevent the adhesion of the sludge generated between the casing 210 and the impeller 230 due to the recirculation phenomenon to minimize the wear of the impeller 230 and to improve the efficiency of the wastewater pump 200 have.

In addition, since the fluid passing through the flow path 113 lubricates, the life span of the liner 100 for the wastewater pump and the maintenance cost due to the replacement of the liner 100 for the wastewater pump can be reduced, The efficiency of the wastewater pump 200 can be improved, and the power required at the time of initial startup of the wastewater pump 200 can be minimized.

While the present invention has been particularly shown and described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And all changes and modifications to the scope of the invention.

100: liner for wastewater pump 110: body
111: Through hole 113: Euro
130: inflow guide part 131: inflow slope
150: Discharge guide portion 151: Discharge slope surface
200: wastewater pump 210: casing
211: inlet 230: impeller
250: motor
D1: Diameter of the impeller D2: Diameter of the inlet

Claims (9)

A liner for a wastewater pump installed between a casing and an impeller to prevent foreign matter from being caught by a recirculation phenomenon,
A main body having a through hole through which fluid flowing through the inlet of the casing passes,
A flow path formed on an outer surface of the main body in a radial direction of the main body so that fluid introduced through the inlet port is discharged to the outside of the main body through the main body;
And an inflow guide portion extending from the through hole to be exposed to the inflow port and guiding a part of the fluid flowing into the inflow port to the flow path. delete The method according to claim 1,
The inlet guide
And an inflow slope inclined from an end of the portion protruding toward the inlet to the flow path so that the fluid protrudes from the inlet and flows into the flow path. The method of claim 3,
The inflow slope
Wherein the liner is formed as an inner concave curved surface. The method according to claim 1,
And a discharge guide portion that extends further outward than the surface of the impeller facing the main body at the outer periphery of the main body to guide the fluid introduced into the gap between the impeller and the casing by the recirculation phenomenon, And the liner for the wastewater pump. 6. The method of claim 5,
The discharge guide portion
And a discharge inclined surface inclined in a direction in which the impeller is positioned at an outer end of a surface facing the casing. The method according to claim 6,
The discharge inclined surface
Wherein the liner is formed as an inner concave curved surface. The method according to claim 1,
The flow path
Wherein the impeller is formed in a curved shape curved in a direction in which the impeller is rotated so that the fluid flowing into the flow path can be easily introduced, and a plurality of the liner are formed radially around the center of the body. The method according to claim 1,
The flow path
Wherein the liner is formed to have a smaller area from the through hole to an outer end of the main body so as to increase the pressure when the fluid is discharged to the outer periphery of the main body.
KR1020140017368A 2014-02-14 2014-02-14 A liner for sewage pump KR101400161B1 (en)

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KR1020140017368A KR101400161B1 (en) 2014-02-14 2014-02-14 A liner for sewage pump

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101537714B1 (en) * 2015-03-05 2015-07-20 성광수중펌프(주) A self-cleaning function having channel pump

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0680900U (en) * 1993-04-22 1994-11-15 株式会社クボタ Foreign matter intrusion suppression structure between the impeller sliding part and the liner ring
KR960031806A (en) * 1995-02-27 1996-09-17 도오다 고오이찌로 Dynamic Seal Structure of a Closed Centrifugal Pump
JP2001073993A (en) * 1999-09-03 2001-03-21 Mitsubishi Heavy Ind Ltd Centrifugal fluid machinery
JP2007092565A (en) 2005-09-27 2007-04-12 Ebara Corp Centrifugal pump, mixed flow pump, axial flow pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0680900U (en) * 1993-04-22 1994-11-15 株式会社クボタ Foreign matter intrusion suppression structure between the impeller sliding part and the liner ring
KR960031806A (en) * 1995-02-27 1996-09-17 도오다 고오이찌로 Dynamic Seal Structure of a Closed Centrifugal Pump
JP2001073993A (en) * 1999-09-03 2001-03-21 Mitsubishi Heavy Ind Ltd Centrifugal fluid machinery
JP2007092565A (en) 2005-09-27 2007-04-12 Ebara Corp Centrifugal pump, mixed flow pump, axial flow pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101537714B1 (en) * 2015-03-05 2015-07-20 성광수중펌프(주) A self-cleaning function having channel pump

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