KR101818075B1 - Structure of double sealing for vertical multi-stage pump - Google Patents
Structure of double sealing for vertical multi-stage pump Download PDFInfo
- Publication number
- KR101818075B1 KR101818075B1 KR1020160013941A KR20160013941A KR101818075B1 KR 101818075 B1 KR101818075 B1 KR 101818075B1 KR 1020160013941 A KR1020160013941 A KR 1020160013941A KR 20160013941 A KR20160013941 A KR 20160013941A KR 101818075 B1 KR101818075 B1 KR 101818075B1
- Authority
- KR
- South Korea
- Prior art keywords
- sealing member
- seal
- fluid
- space
- impeller
- Prior art date
Links
Images
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
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/106—Shaft sealings 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
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/344—Pressing means the pressing force being applied by means of an elastic ring supporting the slip-ring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/3452—Pressing means the pressing force resulting from the action of a spring
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a double sealing structure of a multi-stage multi-stage pump. More particularly, the present invention relates to an impeller installation space (120) connected to an inlet (110) for the purpose of preventing the risk of leakage of a first fluid, And a discharge space 140 formed in the periphery of the impeller mounting space is connected to the outlet 150 so that the impeller 121 installed in the impeller mounting space 120 Lt; RTI ID = 0.0 > 1 < / RTI > A seal sleeve 170 coupled to an outer surface of the shaft between the impeller 121 and the motor; An actual housing having a second hollow fluid space 183 formed on an outer circumferential surface of the seal sleeve and having an inlet port 181 and an outlet port 182 and having a first hollow portion 184 formed on the upper side and a lower end opened; A seal cover coupled to a lower end of the seal housing and having a second hollow portion at a center thereof; An upper first sealing member 210 'in contact with the outer surface of the seal sleeve, an upper second sealing member 220' in contact with the inner surface of the first hollow portion, and an upper side second sealing member 220 'in contact with the upper side first and second sealing members, An upper mechanical seal 200 'including a rotating ring 230'; A lower first sealing member 210 "contacting the outer surface of the seal sleeve, a lower second sealing member 220" contacting the inner surface of the second hollow portion, and a lower rotatable member contacting the lower first and second sealing members, A lower mechanical chamber 200 "comprising a tingling ring 230 "; Through which it is discharged to the circulation path of the second fluid at the time of leakage of the first fluid, thereby preventing the danger due to the leakage of the first fluid.
Description
The present invention relates to an improved structure of a mechanical seal of a three-stage multi-stage pump used to prevent fluid leakage in a multi-stage pump for pumping various fluids.
In general, a vertical multi-stage pump is also called a vertical pump or a high-pressure pump. It is installed in the middle of a water pipe (water pipe) to send water to a high place in a water tank, And a sealing structure called a mechanical seal is installed inside the pump to prevent leakage of the fluid.
FIG. 1 is a cross-sectional view showing a sealing structure of a conventional multi-stage pump, and FIG. 2 is an enlarged view of a portion 'A' of FIG.
1 and 2, an
Accordingly, when the
At this time, a
The
Here, the
The inner diameter of the
However, as shown in the patent document 1, the
Therefore, there is a demand for an improved sealing structure that can prevent the leakage of the first fluid to the motor side at the source even if the first fluid leaks due to the mechanical seal being unexpectedly obsolete.
The present invention for solving the above-mentioned problems of the prior art can prevent fluid from flowing to the motor side owing to the leakage of the multi-stage multi-stage pump. In addition, when a toxic, acidic or explosive fluid is used, So that a risk factor can be removed without causing a contamination of the pump.
In order to achieve the above object, the present invention provides a double-
And an impeller connected to the shaft of the motor is provided in the impeller mounting space formed between the inlet and the outlet, and a discharge space formed around the impeller mounting space with the partition wall therebetween Stage pump connected to the outlet for discharging the first fluid sucked into the impeller installing space by the impeller rotation to the outlet via the passage and the discharge space of the partition wall;
A cylindrical seal sleeve coupled to an outer surface of the shaft between the impeller and the motor;
A space is formed in the outer circumferential surface of the seal sleeve so as to form a second fluid diesel oil space, an inlet and an outlet connected to the second fluid diesel oil space, a first hollow portion through which the seal sleeve passes, An open threaded housing;
A seal cover coupled to a lower end of the seal housing and having a second hollow portion through which the seal sleeve passes;
An upper second sealing member which is in close contact with an inner surface of the first hollow portion and an upper rotating member which is in close contact with the upper first sealing member and the upper second sealing member, An upper mechanical chamber including a ring;
A lower first sealing member disposed at a lower portion of the upper mechanical chamber and closely contacting an outer surface of the seal sleeve; a lower second sealing member closely contacting an inner surface of the second hollow portion; A lower mechanical seal including a lower rotatable ring closely contacting the two sealing members; And a control unit.
According to the double-sealing structure of the multi-stage pump of the present invention, by applying the double mechanical seal between the motor and the impeller, it is possible to prevent the first fluid discharged through the multi-stage pump from leaking to the motor side, The first fluid is circulated in a mixed state with the second fluid even when the first fluid leaks, so that the first fluid can be prevented from leaking to the motor side have.
Therefore, safety can be improved even in the case of transferring dangerous fluids such as toxic, acidic, volatile or explosive.
1 is a cross-sectional view showing a sealing structure of a conventional multi-stage pump.
2 is an enlarged view of a portion 'A' in Fig.
3 is a cross-sectional view showing a double-sealing structure of a three-stage multi-stage pump according to a first embodiment of the present invention.
4 is a cross-sectional view of a mechanical seal portion as a main portion of Fig. 3;
5 is a cross-sectional view showing a double-sealing structure of a three-stage multi-stage pump according to a second embodiment of the present invention.
6 is a cross-sectional view of a mechanical seal portion as a main portion of Fig. 5;
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. 3 to 6. FIG. It should be understood, however, that there is no intention to limit the invention to the particular form disclosed herein, and that the appended claims are not to be construed as limiting the present invention, The detailed description of the contents overlapping with those described in Document 1 will be omitted.
3 is a cross-sectional view showing a double-sealing structure of a multi-stage multi-stage pump according to a first embodiment of the present invention, and FIG. 4 is a cross-sectional view of a mechanical seal portion as a recess in FIG.
3 and 4, the double sealing structure of the multi-stage multi-stage pump according to the first embodiment of the present invention is such that the double mechanical seals 200 'and 200' 'are provided in the multi- .
An
The present invention for applying the double mechanical seals 200 'and 200' 'to the three-stage
The
The
The
The
The upper mechanical seal 200 'includes an upper first sealing member 210' closely contacting the outer surface of the
Here, the term 'closely coupled' means that two elements are in contact with each other to prevent leakage at least. For example, the upper first sealing member 210 'is made of elastic material such as rubber or silicone , The inner diameter of the upper first sealing member 210 'and the outer diameter of the
The lower mechanical seal 200 '' is for sealing the second hollow 191 of the
Here, the term 'close' means that the two elements are in contact with each other to prevent at least leakage, and the same structure as the close mechanical structure of the upper mechanical chamber 200 'can be applied.
The upper first sealing member 210 'is disposed in the second
The lower
At this time, when the pressure in the second fluid
With this configuration, the first fluid in the
FIG. 5 is a cross-sectional view showing a double-sealing structure of a multi-stage multi-stage pump according to a second embodiment of the present invention, and FIG. 6 is a cross-sectional view of a mechanical seal portion as a recess in FIG.
The double-sealing structure of the multi-stage multi-stage pump according to the second embodiment of the present invention with reference to Figs. 5 and 6 is different from that of the first embodiment only in the arrangement of the lower
6, the lower mechanical seal 200 '' is for sealing the second
At this time, when the pressure in the second fluid
With this configuration, when the leakage occurs due to the deterioration of the lower mechanical chamber 200 '', the pressure of the second fluid
The upper first sealing member 210 'and the lower first sealing member 210' are made of elastic material such as rubber or silicone. Each of the upper first sealing member 210 'and the lower first sealing member 210' has a cylindrical shape, (Not shown) protruding outwardly from the flange, and a coil spring is interposed between the upper and lower flanges to maintain a repulsive force with respect to each flange. In this case, each of the first sealing members 210 ' 210 "push the respective
Although the present invention has been described in connection with the preferred embodiments described above, it will be appreciated by those skilled in the art that various other modifications and variations can be made without departing from the spirit and scope of the invention, All such changes and modifications are intended to be within the scope of the appended claims.
100: stage type multi-stage pump 110: inlet
120: impeller installation space 121: impeller
130: passage 140: discharge space
150: outlet 160: shaft
170: seal sleeve
171: Supporting protrusion 172: Supporting ring
180: seal housing
181: Inlet port 182: Outlet port
183: second fluid diesel oil space 184: first hollow portion
190: seal cover 191: second hollow portion
200: Mechanical seal
210: first sealing member 211: spring
220: second sealing member 221: O-ring
230: rotating ring
Claims (7)
A cylindrical seal sleeve coupled to an outer surface of the shaft between the impeller and the motor;
A space is formed in the outer circumferential surface of the seal sleeve so as to form a second fluid diesel oil space, an inlet and an outlet connected to the second fluid diesel oil space, a first hollow portion through which the seal sleeve passes, An open threaded housing;
A seal cover coupled to a lower end of the seal housing and having a second hollow portion through which the seal sleeve passes;
An upper second sealing member which is in close contact with an inner surface of the first hollow portion and an upper rotating member which is in close contact with the upper first sealing member and the upper second sealing member, An upper mechanical chamber including a ring;
A lower first sealing member disposed at a lower portion of the upper mechanical chamber and closely contacting an outer surface of the seal sleeve; a lower second sealing member closely contacting an inner surface of the second hollow portion; A lower mechanical seal including a lower rotatable ring closely contacting the two sealing members; / RTI >
The upper mechanical seal chamber is formed such that the upper first sealing member is held in contact with the upper end of the support ring fixed to the outer peripheral surface of the seal sleeve at the lower end of the upper first seal member in the second fluid diesel oil space, Is brought into contact with the upper rotating ring,
The lower-
The lower first sealing member is disposed in the impeller mounting space at the lower end of the seal cover so that the lower end of the lower first sealing member is held in contact with the upper end of the support protrusion protruded from the lower end of the seal sleeve, The rotating ring is brought into contact with the rotating ring,
The lower first sealing member is disposed in the second fluid diesel oil space and the upper end of the lower first sealing member is held in contact with the lower end of the supporting ring fixed to the outer peripheral surface of the sealing sleeve and the lower end of the lower first sealing member is held in the lower rotary The ring is brought into contact with the ring,
And the pressure in the second fluid diesel oil space is smaller than the pressure in the impeller installing space.
The upper first sealing member and the lower first sealing member are made of a stretchable material and have a cylindrical tubular shape and have a flange protruding outwardly from the upper and lower outer circumferential surfaces respectively. So that a repulsive force acts on the double-layered pump.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160013941A KR101818075B1 (en) | 2016-02-04 | 2016-02-04 | Structure of double sealing for vertical multi-stage pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160013941A KR101818075B1 (en) | 2016-02-04 | 2016-02-04 | Structure of double sealing for vertical multi-stage pump |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20170092808A KR20170092808A (en) | 2017-08-14 |
KR101818075B1 true KR101818075B1 (en) | 2018-01-12 |
Family
ID=60142247
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020160013941A KR101818075B1 (en) | 2016-02-04 | 2016-02-04 | Structure of double sealing for vertical multi-stage pump |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR101818075B1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI696763B (en) * | 2019-04-11 | 2020-06-21 | 大井泵浦工業股份有限公司 | Upright pump structure |
CN112628146A (en) * | 2020-12-31 | 2021-04-09 | 上海凯泉泵业(集团)有限公司 | Multistage double suction pump with vertical structure |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006029241A (en) * | 2004-07-16 | 2006-02-02 | Ebara Corp | Centrifugal pump |
JP2012207550A (en) * | 2011-03-29 | 2012-10-25 | Terada Pump Seisakusho:Kk | Oil lifter device for lubricating sliding surface in shaft sealing device in oil chamber of submerged pump |
KR101370556B1 (en) * | 2013-10-18 | 2014-03-06 | 대웅기업주식회사 | Dual sealing structure for underwater pump |
-
2016
- 2016-02-04 KR KR1020160013941A patent/KR101818075B1/en active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006029241A (en) * | 2004-07-16 | 2006-02-02 | Ebara Corp | Centrifugal pump |
JP2012207550A (en) * | 2011-03-29 | 2012-10-25 | Terada Pump Seisakusho:Kk | Oil lifter device for lubricating sliding surface in shaft sealing device in oil chamber of submerged pump |
KR101370556B1 (en) * | 2013-10-18 | 2014-03-06 | 대웅기업주식회사 | Dual sealing structure for underwater pump |
Also Published As
Publication number | Publication date |
---|---|
KR20170092808A (en) | 2017-08-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11441424B2 (en) | Modular gland arrangements for a fluid end assembly | |
CN103459903B (en) | shaft seal insert | |
US5727792A (en) | Triple cartridge seal having one inboard and two concentric seals for chemical processing pump | |
KR101818075B1 (en) | Structure of double sealing for vertical multi-stage pump | |
KR101370773B1 (en) | The mechanical seal | |
CN105673549B (en) | Axial split pump | |
US6461115B1 (en) | Suction chamber for a horizontal pumping system | |
RU2681727C1 (en) | Centrifugal pump airtight sealing module | |
AU2018204215A1 (en) | Pump casing for a centrifugal pump and centrifugal pump | |
US10260517B2 (en) | Fixed suction chamber with rear and front seal removal | |
KR102308037B1 (en) | Pump | |
CA2522657C (en) | Pressure relief arrangement for a pump | |
US10260631B2 (en) | Leak resistant pump | |
KR102492784B1 (en) | Process units for hazardous materials | |
US8888105B1 (en) | Mechanical seal system | |
KR100950847B1 (en) | A rear containment shell device of magenet pump | |
RU2701492C1 (en) | Pump unit with cartridge type end seal | |
CN108626162B (en) | Oil seal structure and compression apparatus including the same | |
RU2282085C1 (en) | Multiple-stepped end sealing device for shaft | |
EP3837456B1 (en) | Shut-off device for sealing a shaft of a rotary machine and rotary machine | |
GB2061413A (en) | A seal assembly | |
US12000489B2 (en) | Elastomer spring type mechanical seal | |
US10995763B1 (en) | Dynamic seal | |
JP2019039417A (en) | Seal system | |
US11703063B2 (en) | Pump gland with rotary dynamic seal |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant |