CN102116309B - Mechanical sealing device for centrifugal pump - Google Patents
Mechanical sealing device for centrifugal pump Download PDFInfo
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- CN102116309B CN102116309B CN 201010613673 CN201010613673A CN102116309B CN 102116309 B CN102116309 B CN 102116309B CN 201010613673 CN201010613673 CN 201010613673 CN 201010613673 A CN201010613673 A CN 201010613673A CN 102116309 B CN102116309 B CN 102116309B
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- axle sleeve
- machine
- pump
- mechanical seal
- cover
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Abstract
The invention discloses a mechanical sealing device for a centrifugal pump, which is installed on a pump shaft of the centrifugal pump and arranged in a mechanical sealing chamber of a pump cover. The mechanical sealing device for the centrifugal pump comprises a mechanical sealing shaft sleeve, a mechanical sealing press cover, a stationary ring, a moving ring seat, a moving ring and a plurality of springs. The mechanical sealing shaft sleeve is fixedly sleeved on the pump shaft; the mechanical sealing press cover is sleeved on the mechanical sealing shaft sleeve and fixed at the front end of the pump cover; the stationary ring is installed in a cavity of the mechanical sealing press cover; the moving ring seat is fixedly sleeved on the mechanical sealing shaft sleeve, the cavity of the moving ring seat is of a single-stepped cylindrical surface with a small rear part and a large front part, and a plurality of blind holes are arranged on a step surface; the moving ring is axially and movably installed in the cavity at the front part of the moving ring seat; the plurality of springs are placed in the blind holes of the moving ring seat, front ends of the springs are connected to the rear end surface of the moving ring to enable the front end surface of the moving ring to be in appropriate contact with the rear end surface of the stationary ring in an attaching manner; and a fixed seat is sleeved at the front part of the mechanical sealing shaft sleeve, and the fixed seat, the mechanical sealing shaft sleeve and the pump shaft are fixed together through bolts.
Description
Technical field
The present invention relates to a kind of mechanical seal device that is used on the centrifugal pump.
Background technique
Packing seal or bulk type mechanical seal are adopted in the existing mechanical seal that is used on the centrifugal pump more.Wherein, the function admirable of mechanical seal it exist the dismounting maintenance inconvenient, also causes the defective that medium is revealed easily, though packing seal maintenance and replacing are convenient, its sealability does not have mechanical seal good, therefore needs to be resolved hurrily.
Summary of the invention
The objective of the invention is provides a kind of mechanical seal device that is used on the centrifugal pump in order to overcome the deficiency of existing technology, and it can prevent reliably that medium from leaking, and good sealing effect and easy accessibility have reduced maintenance load.
The technological scheme that realizes above-mentioned purpose is: a kind of mechanical seal device that is used on the centrifugal pump; Be installed on the pump shaft of said centrifugal pump and be arranged in the mechanical seal chamber of pump cover; Said seal arrangement comprises machine envelope axle sleeve, a machine sealed cover, a stationary ring, a rotating seat, a rotating ring, some springs, a fixed base and some O-ring seals; Wherein, said machine envelope axle sleeve is enclosed within on the said pump shaft regularly; Said machine sealed cover is enclosed within on the said machine envelope axle sleeve and is fixed on the front end of said pump cover; Said stationary ring is installed in the inner chamber of said machine sealed cover; Said rotating seat is enclosed within on the said machine envelope axle sleeve regularly, the inner chamber of this rotating seat be the back little before big one-level stepped shaft cylndrical surface, and on step surface, be uniformly distributed with and offer some blind holes; Said rotating ring is installed in the anterior inner chamber of said rotating seat and can be enclosed within on the said machine envelope axle sleeve with moving axially; Said some springs are placed in the blind hole of said rotating seat one by one, and the front end of these some springs is connected on the ear end face of said rotating ring, so that the ear end face of the front-end face of said rotating ring and said stationary ring is fitted; Said fixed seating is fixed together fixed base, machine envelope axle sleeve and pump shaft at the anterior of said machine envelope axle sleeve and through bolt.
Above-mentioned be used for the mechanical seal device on the centrifugal pump, wherein, radially extend a bulge loop on the rearward end outer surface of said machine envelope axle sleeve, said rotating seat is resisted against on the front-end face of this bulge loop; The forward outer surface of said machine envelope axle sleeve is provided with an annular groove, in this annular groove, clamps an assembled plate, and said machine sealed cover is resisted against on the ear end face of said assembled plate.
Above-mentioned be used for the mechanical seal device on the centrifugal pump; Wherein, between the internal surface of the outer surface of said stationary ring and said machine sealed cover, between the outer surface of the internal surface of said machine envelope axle sleeve and said pump shaft, be respectively equipped with an O-ring seals between the front-end face of the ear end face of said machine sealed cover and said pump cover.
Above-mentioned be used for the mechanical seal device on the centrifugal pump, wherein, said machine sealed cover is provided with one and draws small opening.
Above-mentioned be used for the mechanical seal device on the centrifugal pump, wherein, offer on the said pump cover one be communicated to the mechanical seal chamber of said pump cover flushing hole.
Above-mentioned be used for the mechanical seal device on the centrifugal pump, wherein, the rear portion of said pump shaft is suit one axle sleeve also, and the rear sleeve of said machine envelope axle sleeve is in the front portion of this axle sleeve, the front outer chamfering of this axle sleeve.
The technological scheme that is used for the mechanical seal device on the centrifugal pump of the present invention is assembled into each component of mechanical seal in advance, is installed on the pump shaft again, has made things convenient for the installation and removal of pump group.It relies on the pressure of sealing medium on the surface of contact of rotating ring that rotates and stationary ring, to produce suitable impacting force; The both ends of the surface appropriateness is fitted; Make keep all the time between the surface of contact of rotating ring and stationary ring one deck as thin as a wafer liquid film and reach the purpose of sealing; Therefore can prevent reliably that medium from leaking, good sealing effect.
Description of drawings
Fig. 1 is the structural representation that is used for the mechanical seal device on the centrifugal pump of the present invention;
Fig. 2 is that the K of Fig. 1 is to view.
Embodiment
In order to understand technological scheme of the present invention better, below through embodiment particularly and combine accompanying drawing at length to explain:
See also Fig. 1 and Fig. 2; The mechanical seal device that is used on the centrifugal pump of the present invention; Be installed on the pump shaft 1 of centrifugal pump and be arranged in the mechanical seal chamber of pump cover 2, the sealing device comprises machine envelope axle sleeve 3, a machine sealed cover 4, a stationary ring 5, a rotating seat 6, a rotating ring 7, some springs 8, a fixed base 9 and some O-ring seals.Wherein:
Rear portion suit one axle sleeve 10 of pump shaft 1, the front outer of this axle sleeve 10 has 15 ° angle;
Machine envelope axle sleeve 3 is enclosed within on the pump shaft 1 regularly, and the rear sleeve of this machine envelope axle sleeve 3 is provided with an O-ring seals 12 in the front portion of axle sleeve 10 between the rear inner surface of machine envelope axle sleeve 3 and the outer surface of axle sleeve 10; Radially extend a bulge loop 31 on the rearward end outer surface of machine envelope axle sleeve 3, the forward outer surface of machine envelope axle sleeve 3 is provided with an annular groove, in this annular groove, clamps an assembled plate 11; Be provided with O-ring seals 13 between the middle part internal surface of machine envelope axle sleeve 3 and the outer surface of pump shaft 1, can prevent that the liquid in the pump from going out through the clearance leakage between machine envelope axle sleeve 3 and the pump shaft 1;
Machine sealed cover 4 is enclosed within on the machine envelope axle sleeve 3 and is fixed on the front end of pump cover 2 through four bolts that are uniformly distributed with 41 and nut 42, and this machine sealed cover 4 is resisted against on the ear end face of assembled plate 11; Be provided with O-ring seals 14 between the front-end face of the ear end face of machine sealed cover 4 and pump cover 2, can prevent that the liquid in the pump from going out through the clearance leakage between machine sealed cover 4 and the pump cover 2;
Rotating seat 6 is enclosed within on the machine envelope axle sleeve 3 through positioning screwn 60 regularly; The inner chamber of this rotating seat 6 be the back little before big one-level stepped shaft cylndrical surface; And on step surface, be uniformly distributed with and offer some blind holes, this rotating seat 6 is resisted against on the front-end face of bulge loop 31 of machine envelope axle sleeve 3;
Rotating ring 7 is installed in the anterior inner chamber of rotating seat 6 and can be enclosed within on the machine envelope axle sleeve 3 with moving axially; Rotate along with the rotation of pump shaft 1 drives rotating ring 7 simultaneously through rotating seat 6.
Some springs 8 are placed in the blind hole of rotating seat 6 one by one, and the front end of these some springs 8 is connected on the ear end face of rotating ring 7, so that the ear end face of the front-end face of rotating ring 7 and stationary ring 5 appropriateness is fitted;
Fixed base 9 is enclosed within the anterior of machine envelope axle sleeve 3 and through bolt 90 fixed base 9, machine envelope axle sleeve 3 and pump shaft 1 is fixed together.
The working principle that is used for the mechanical seal device on the centrifugal pump of the present invention is: at the pump operation process; In the chamber that the mechanical seal chamber of pump cover 2 and machine sealed cover 4 constitute, can form to be full of and have the certain pressure fed sheet of a media; Because the both ends of the surface area that rotating ring 7 is stressed does not wait; Can form the impacting force towards stationary ring 5 directions, the surface of contact appropriateness that make dynamic and static ring 7, forms between 5 is fitted, and keeps the purpose that one deck liquid film as thin as a wafer reaches sealing between this surface of contact thereby so make.
Radially offer one on the machine sealed cover 4 and draw small opening 40 (D), reclaim, guarantee the Security and the reliability of unit operation if can draw small opening 40 through this when having micro-amounts of liquids in the pump to leak.Also radially offer washing solution inlet FI, quench liquid inlet QI and quench liquid outlet DO on the machine sealed cover 4.
Offer on the pump cover 2 one be communicated to the mechanical seal chamber of pump cover 2 flushing hole 20, can be directly dynamic and static ring 7, the surface of contact that forms between 5 be washed.Than using external flushing line, have advantages such as simple in structure, safe and reliable.
Before installation; Earlier some springs 8 are put into the blind hole of rotating seat 6, again rotating ring 7 is packed in the anterior inner chamber of rotating seat 6, then the rotating seat that assembles 6 is sleeved on the machine envelope axle sleeve 3; And rotating seat 6 is fixed on the machine envelope axle sleeve 3 through pressing closer screw 60; Then pack into successively stationary ring 5 and machine sealed cover 4, and the ear end face of stationary ring 5 and the front-end face of rotating ring 7 are fitted snap in assembled plate 11 in the annular groove that machine seals axle sleeve 3 then; And assembled plate 11 is fixed on the machine sealed cover 4 through bolt; Rotating seat 6, rotating ring 7, stationary ring 5 and machine sealed cover 4 are limited on the machine envelope axle sleeve 3,, at last machine are sealed axle sleeve 3 and be enclosed within on the pump shaft 1 so that the maintenance of the spacing between rotating seat 6 and the stationary ring 5 is invariable; With bolt 40 machine sealed cover 4 is fixed on the pump cover 2, at the anterior suit fixed base 9 of machine envelope axle sleeve 3 and through screw 90 fixed base 9, machine envelope axle sleeve 3 and pump shaft 1 is fixed together again.
Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the present invention; And be not to be used as qualification of the present invention; As long as in connotation scope of the present invention, all will drop in claims scope of the present invention the above embodiment's variation, modification.
Claims (6)
1. mechanical seal device that is used on the centrifugal pump; Be installed on the pump shaft of said centrifugal pump and be arranged in the mechanical seal chamber of pump cover; Said seal arrangement comprises machine envelope axle sleeve, a machine sealed cover, a stationary ring, a rotating seat, a rotating ring, some springs, a fixed base and some O-ring seals; It is characterized in that said machine envelope axle sleeve is enclosed within on the said pump shaft regularly; Said machine sealed cover is enclosed within on the said machine envelope axle sleeve and is fixed on the front end of said pump cover; Said stationary ring is installed in the inner chamber of said machine sealed cover; Said rotating seat is enclosed within on the said machine envelope axle sleeve regularly, the inner chamber of this rotating seat be the back little before big one-level stepped shaft cylndrical surface, and on step surface, be uniformly distributed with and offer some blind holes; Said rotating ring is installed in the anterior inner chamber of said rotating seat and can be enclosed within on the said machine envelope axle sleeve with moving axially; Said some springs are placed in the blind hole of said rotating seat one by one, and the front end of these some springs is connected on the ear end face of said rotating ring, so that the ear end face of the front-end face of said rotating ring and said stationary ring is fitted; Said fixed seating is fixed together fixed base, machine envelope axle sleeve and pump shaft at the anterior of said machine envelope axle sleeve and through bolt.
2. the mechanical seal device that is used on the centrifugal pump according to claim 1 is characterized in that, radially extends a bulge loop on the rearward end outer surface of said machine envelope axle sleeve, and said rotating seat is resisted against on the front-end face of this bulge loop; The forward outer surface of said machine envelope axle sleeve is provided with an annular groove, in this annular groove, clamps an assembled plate, and said machine sealed cover is resisted against on the ear end face of said assembled plate.
3. the mechanical seal device that is used on the centrifugal pump according to claim 1; It is characterized in that, between the internal surface of the outer surface of said stationary ring and said machine sealed cover, between the outer surface of the internal surface of said machine envelope axle sleeve and said pump shaft, be respectively equipped with an O-ring seals between the front-end face of the ear end face of said machine sealed cover and said pump cover.
4. the mechanical seal device that is used on the centrifugal pump according to claim 1 is characterized in that, said machine sealed cover is provided with one and draws small opening.
5. the mechanical seal device that is used on the centrifugal pump according to claim 1 is characterized in that, offer on the said pump cover one be communicated to the mechanical seal chamber of said pump cover flushing hole.
6. the mechanical seal device that is used on the centrifugal pump according to claim 1 is characterized in that, the rear portion of said pump shaft is suit one axle sleeve also, and said machine seals the rear sleeve of axle sleeve in the front portion of this axle sleeve, the front outer chamfering of this axle sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010613673 CN102116309B (en) | 2010-12-30 | 2010-12-30 | Mechanical sealing device for centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010613673 CN102116309B (en) | 2010-12-30 | 2010-12-30 | Mechanical sealing device for centrifugal pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102116309A CN102116309A (en) | 2011-07-06 |
| CN102116309B true CN102116309B (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010613673 Active CN102116309B (en) | 2010-12-30 | 2010-12-30 | Mechanical sealing device for centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102116309B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994222B (en) * | 2013-02-18 | 2016-06-08 | 祥景精机股份有限公司 | Shaft seal |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606518A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Mechanical seal device of plant water pump for nuclear power plant |
| CN102606520A (en) * | 2012-03-27 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Mechanical seal for starting water feeding pump |
| CN102606540B (en) * | 2012-03-27 | 2014-04-09 | 上海阿波罗机械股份有限公司 | Water pump for factory for nuclear power station |
| CN102606485B (en) * | 2012-03-27 | 2014-08-20 | 上海阿波罗机械股份有限公司 | Startup water feed pump for nuclear power station |
| CN105179300A (en) * | 2015-09-10 | 2015-12-23 | 临涣中利发电有限公司 | Condensate pump shaft seal device |
| CN105545796A (en) * | 2016-01-22 | 2016-05-04 | 河南神马尼龙化工有限责任公司 | Mechanical sealing structure for centrifugal pump |
| CN109404329A (en) * | 2018-12-25 | 2019-03-01 | 三联泵业股份有限公司 | For positioning the structure of non-equilibrium bulk type mechanical seal and axle sleeve in double entry pump |
| CN112096875A (en) * | 2020-09-02 | 2020-12-18 | 东台市光明机械密封有限公司 | Light mechanical sealing device for pump and machining process thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87207494U (en) * | 1987-09-15 | 1988-03-09 | 上海水泵厂 | Static-pressure balancer for a centrifugal pump |
| EP0744569A1 (en) * | 1995-05-24 | 1996-11-27 | APV Fluid Handling Horsens A/S | A centrifugal pump |
| CN2644724Y (en) * | 2003-09-27 | 2004-09-29 | 上海连成（集团）有限公司 | Integral packaging type mechanical seal for centrifugal pump |
| CN201031812Y (en) * | 2007-04-28 | 2008-03-05 | 胡滨 | Cone spring mechanical sealing member |
| CN201925221U (en) * | 2010-12-30 | 2011-08-10 | 上海阿波罗机械股份有限公司 | Mechanical sealing device for eccentric pump |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| HUT45307A (en) * | 1985-02-01 | 1988-06-28 | Pumps W A Ltd | Mechanic sealing |
-
2010
- 2010-12-30 CN CN 201010613673 patent/CN102116309B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87207494U (en) * | 1987-09-15 | 1988-03-09 | 上海水泵厂 | Static-pressure balancer for a centrifugal pump |
| EP0744569A1 (en) * | 1995-05-24 | 1996-11-27 | APV Fluid Handling Horsens A/S | A centrifugal pump |
| CN2644724Y (en) * | 2003-09-27 | 2004-09-29 | 上海连成（集团）有限公司 | Integral packaging type mechanical seal for centrifugal pump |
| CN201031812Y (en) * | 2007-04-28 | 2008-03-05 | 胡滨 | Cone spring mechanical sealing member |
| CN201925221U (en) * | 2010-12-30 | 2011-08-10 | 上海阿波罗机械股份有限公司 | Mechanical sealing device for eccentric pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994222B (en) * | 2013-02-18 | 2016-06-08 | 祥景精机股份有限公司 | Shaft seal |
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| Publication number | Publication date |
|---|---|
| CN102116309A (en) | 2011-07-06 |
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