CN102116309A - Mechanical sealing device for centrifugal pump - Google Patents

Mechanical sealing device for centrifugal pump Download PDF

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Publication number
CN102116309A
CN102116309A CN 201010613673 CN201010613673A CN102116309A CN 102116309 A CN102116309 A CN 102116309A CN 201010613673 CN201010613673 CN 201010613673 CN 201010613673 A CN201010613673 A CN 201010613673A CN 102116309 A CN102116309 A CN 102116309A
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CN
China
Prior art keywords
axle sleeve
pump
mechanical seal
cover
centrifugal pump
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Granted
Application number
CN 201010613673
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Chinese (zh)
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CN102116309B (en
Inventor
陆金琪
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Shanghai Apollo Machinery Co Ltd
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Shanghai Apollo Machinery Co Ltd
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Priority to CN 201010613673 priority Critical patent/CN102116309B/en
Publication of CN102116309A publication Critical patent/CN102116309A/en
Application granted granted Critical
Publication of CN102116309B publication Critical patent/CN102116309B/en
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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

A kind of mechanical seal device that is used on the centrifugal pump
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 deficiencies in the prior art, 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 described centrifugal pump and be arranged in the mechanical seal chamber of pump cover, described 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, described machine envelope axle sleeve is enclosed within on the described pump shaft regularly; Described machine sealed cover is enclosed within on the described machine envelope axle sleeve and is fixed on the front end of described pump cover; Described stationary ring is installed in the inner chamber of described machine sealed cover; Described rotating seat is enclosed within on the described 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 uniformly on step surface offer some blind holes; Described rotating ring is installed in the anterior inner chamber of described rotating seat and can be enclosed within on the described machine envelope axle sleeve with moving axially; Described some springs are placed in the blind hole of described rotating seat one by one, and the front end of these some springs is connected on the ear end face of described rotating ring, so that the ear end face of the front-end face of described rotating ring and described stationary ring is fitted; Described fixed seating is fixed together fixed base, machine envelope axle sleeve and pump shaft at the anterior of described machine envelope axle sleeve and by bolt.
The above-mentioned mechanical seal device that is used on the centrifugal pump wherein, radially extends a bulge loop on the rearward end outer surface of described machine envelope axle sleeve, and described rotating seat is resisted against on the front-end face of this bulge loop; The forward outer surface of described machine envelope axle sleeve is provided with an annular groove, clamps an assembled plate in this annular groove, and described machine sealed cover is resisted against on the ear end face of described assembled plate.
The above-mentioned mechanical seal device that is used on the centrifugal pump, wherein, between the internal surface of the outer surface of described stationary ring and described machine sealed cover, between the outer surface of the internal surface of described machine envelope axle sleeve and described pump shaft, be respectively equipped with an O-ring seals between the front-end face of the ear end face of described machine sealed cover and described pump cover.
The above-mentioned mechanical seal device that is used on the centrifugal pump, wherein, described machine sealed cover is provided with one and draws small opening.
The above-mentioned mechanical seal device that is used on the centrifugal pump wherein, is offered a flushing hole that is communicated to the mechanical seal chamber of described pump cover on the described pump cover.
The above-mentioned mechanical seal device that is used on the centrifugal pump, wherein, the rear portion of described pump shaft is suit one axle sleeve also, and the rear sleeve of described 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 to produce suitable impacting force on the surface of contact of rotating ring that rotates and stationary ring, 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 by embodiment particularly and be described in detail in conjunction with the accompanying drawings:
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, clamps an assembled plate 11 in this annular groove; 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 by 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 by four uniform bolts 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 by the clearance leakage between machine sealed cover 4 and the pump cover 2;
Stationary ring 5 is installed in the inner chamber of machine sealed cover 4; Be provided with O-ring seals 15 between the internal surface of the outer surface of stationary ring 5 and machine sealed cover 4, can prevent that the liquid in the pump from going out by the clearance leakage between stationary ring 5 and the machine sealed cover 4;
Rotating seat 6 is enclosed within on the machine envelope axle sleeve 3 regularly by positioning screwn 60, the inner chamber of this rotating seat 6 is little preceding big one-level stepped shaft cylndrical surface, back, and uniformly on step surface 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 by 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 by 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 impacting force towards stationary ring 5 directions, the surface of contact appropriateness that forms between the dynamic and static ring 7,5 is fitted, keep 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 by 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 a flushing hole 20 that is communicated to the mechanical seal chamber of pump cover 2 on the pump cover 2, can directly wash the surface of contact that forms between the dynamic and static ring 7,5.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 6 that assembles is sleeved on the machine envelope axle sleeve 3, and rotating seat 6 is fixed on the machine envelope axle sleeve 3 by 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, then assembled plate 11 is snapped in the annular groove of machine envelope axle sleeve 3, and assembled plate 11 is fixed on the machine sealed cover 4 by bolt, make rotating seat 6 like this, rotating ring 7, stationary ring 5 and machine sealed cover 4 are limited on the machine envelope axle sleeve 3, so that the maintenance of the spacing between rotating seat 6 and the stationary ring 5 is invariable, at last machine being sealed axle sleeve 3 is enclosed within on the pump shaft 1, with bolt 40 machine sealed cover 4 is fixed on the pump cover 2, the anterior suit fixed base 9 at machine envelope axle sleeve 3 also passes through screw 90 with fixed base 9 again, machine envelope axle sleeve 3 and pump shaft 1 are fixed together.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the 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 described centrifugal pump and be arranged in the mechanical seal chamber of pump cover, described 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 described machine envelope axle sleeve is enclosed within on the described pump shaft regularly; Described machine sealed cover is enclosed within on the described machine envelope axle sleeve and is fixed on the front end of described pump cover; Described stationary ring is installed in the inner chamber of described machine sealed cover; Described rotating seat is enclosed within on the described 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 uniformly on step surface offer some blind holes; Described rotating ring is installed in the anterior inner chamber of described rotating seat and can be enclosed within on the described machine envelope axle sleeve with moving axially; Described some springs are placed in the blind hole of described rotating seat one by one, and the front end of these some springs is connected on the ear end face of described rotating ring, so that the ear end face of the front-end face of described rotating ring and described stationary ring is fitted; Described fixed seating is fixed together fixed base, machine envelope axle sleeve and pump shaft at the anterior of described machine envelope axle sleeve and by 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 described machine envelope axle sleeve, and described rotating seat is resisted against on the front-end face of this bulge loop; The forward outer surface of described machine envelope axle sleeve is provided with an annular groove, clamps an assembled plate in this annular groove, and described machine sealed cover is resisted against on the ear end face of described 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 described stationary ring and described machine sealed cover, between the outer surface of the internal surface of described machine envelope axle sleeve and described pump shaft, be respectively equipped with an O-ring seals between the front-end face of the ear end face of described machine sealed cover and described pump cover.
4. the mechanical seal device that is used on the centrifugal pump according to claim 1 is characterized in that, described 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, offers a flushing hole that is communicated to the mechanical seal chamber of described pump cover on the described pump cover.
6. the mechanical seal device that is used on the centrifugal pump according to claim 1 is characterized in that, the rear portion of described pump shaft is suit one axle sleeve also, and described machine seals the rear sleeve of axle sleeve in the front portion of this axle sleeve, the front outer chamfering of this axle sleeve.
CN 201010613673 2010-12-30 2010-12-30 Mechanical sealing device for centrifugal pump Active CN102116309B (en)

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 true CN102116309A (en) 2011-07-06
CN102116309B CN102116309B (en) 2012-07-25

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Cited By (8)

* Cited by examiner, † Cited by third party
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
CN102606485A (en) * 2012-03-27 2012-07-25 上海阿波罗机械股份有限公司 Startup water feed pump for nuclear power station
CN102606540A (en) * 2012-03-27 2012-07-25 上海阿波罗机械股份有限公司 Water pump for factory for nuclear power station
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
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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
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

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986004655A1 (en) * 1985-02-01 1986-08-14 Pumps W.A. Ltd. Mechanical seal
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986004655A1 (en) * 1985-02-01 1986-08-14 Pumps W.A. Ltd. Mechanical seal
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 (9)

* Cited by examiner, † Cited by third party
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
CN102606485A (en) * 2012-03-27 2012-07-25 上海阿波罗机械股份有限公司 Startup water feed pump for nuclear power station
CN102606540A (en) * 2012-03-27 2012-07-25 上海阿波罗机械股份有限公司 Water pump for factory for nuclear power station
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
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

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