CN201068983Y - Contact type dry running mechanical sealing - Google Patents

Contact type dry running mechanical sealing Download PDF

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Publication number
CN201068983Y
CN201068983Y CNU200720041244XU CN200720041244U CN201068983Y CN 201068983 Y CN201068983 Y CN 201068983Y CN U200720041244X U CNU200720041244X U CN U200720041244XU CN 200720041244 U CN200720041244 U CN 200720041244U CN 201068983 Y CN201068983 Y CN 201068983Y
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CN
China
Prior art keywords
seal
splayed shape
shape chute
faces
ring
Prior art date
Application number
CNU200720041244XU
Other languages
Chinese (zh)
Inventor
吴兆山
李鲲
姚黎明
杨博峰
班玉红
郑国运
丁思云
Original Assignee
合肥通用机械研究院
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 合肥通用机械研究院 filed Critical 合肥通用机械研究院
Priority to CNU200720041244XU priority Critical patent/CN201068983Y/en
Application granted granted Critical
Publication of CN201068983Y publication Critical patent/CN201068983Y/en

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Abstract

A contact dry run mechanical seal comprises a rotating ring and two geostationary rings. The rotating ring is provided with two seal end faces which are parallel with each other and respectively are mutually jointed with the end faces of the two geostationary rings and can relatively glide, thereby forming two moving sealing faces. The utility model is characterized in that the two seal end faces of the rotating ring are provided with a group of splayed launders which distribute along the circumference of the sea end faces. Each splayed launder comprises two symmetrical flumes, the angles Alpha formed by the two symmetrical flumes and the normal of the seal end faces are equal and are opposite in the direction. The modulus of the angle Alpha is larger than 0 degree and less than or equal to 60 degrees. The inner diameter of the splayed launder is provided with a ring groove which is communicated with the splayed launder. The inner side of the ring groove is provided with a seal dam. The utility model is suitable for the rotating mechanical axis end seal such as a pump with middle or low parameter and a draught fan, in particular, a bidirectional rotating gas seal.

Description

Contact-type is done running mechanical seal
Technical field:
The utility model relates to mechanical seal, the machineries such as the rotary pump class that is applied to carry all kinds of flowing mediums, stirrer, compressor of more specifically saying so are to stop the mechanical seal along the slot leakage between running shaft and the mechanical hull of flowing medium that rotary mechanism carries.
Background technique:
As shown in Figure 1, in machinery such as the rotary pump that is used for the conveyance fluid medium, stirrer, compressors, in order to stop the flowing medium of being carried by rotary mechanism 1 to produce leakage from media end to motor side along the slit 4 between running shaft 2 and the mechanical hull 3, usual manner is that mechanical seal is set.
As shown in Figure 2, rotating ring seal ring 8 is the leakage problems that solve between rotating ring 9 and the running shaft 2 in the mechanical seal, stationary ring seal ring 11 is the leakage problems that solve between stationary ring 10 and the housing 3, spring 7 is the compensating actions that play after pretension and the seal wears, guarantee the work of mechanical seal continuous and effective, Cock screw 5 and spring seat 6 play fixing spring 7 and transmitting torque effect, stationary ring 10 and rotating ring 9 are formed the mechanical seal friction pair, play dynamic rotary seal effect, be the core component of mechanical seal.
Continuous development along with the further deep process technology of petrochemicals, in a lot of production procedures, do not allow to use axle envelope oiling agent and the resistance sealing liquid of liquid medium (such as each class lubricating oil, water etc.) as rotating equipments such as pump, blower fan, reactors, because in a single day this liquid medium leaks in the working medium, or participate in reacting, or influence the major product quality, some even entail dangers to are to the safety of apparatus, and inflammable, explosive often gas or the lower boiling volatile liquid of the medium that is transferred do not allow it to leak in the atmosphere yet.Therefore, use pure inert gas (as nitrogen) as the gas film lubrication mechanical seal of isolating, gas is sealed in resistance, i.e. " dry gas seals " more and more.At present, be the chute (as spiral chute) of on seal face, leaving the micron order degree of depth for the enforcement of " dry gas seals ", mainly be to utilize the Hydrodynamic effect to set up hydrodynamic pressure balance closure power, realize the non-contact of sealing surface.But because the chute degree of depth is only at micron order, difficulty of processing is big, and not blocked in order to guarantee chute, must the baroque filter element of corresponding outfit etc. auxiliary system.Therefore, " dry gas seals " used in large-scale units such as turbocompressor, turbo-expander preferably at present.And not high in rotating speed, pressure and other parameters, and on the equipment such as the pump that has a large capacity and a wide range, blower fan, because of the cost height, the maintenance cost height can not be used widely.
The model utility content:
The utility model is for avoiding above-mentioned existing in prior technology deficiency, provide a kind of auxiliary facility simple, do not need configurating filtered unit, can realize that the contact-type of gas seal is done running mechanical seal, on equipment such as pump, blower fan so that gas seal is used widely.
The technological scheme that the utility model technical solution problem is adopted is:
The utility model comprises a rotating ring and two stationary rings, and rotating ring has two seal faces that are parallel to each other, but fits mutually and slide relative with the seal face of two stationary rings respectively, constitutes two motive sealing faces.
Structural feature of the present utility model is that one group of splayed shape chute is set on the seal face of rotating ring, the splayed shape chute evenly distributes along the circumferencial direction of seal face, each splayed shape chute is made up of the skewed slot of two symmetries, the angle α size of the skewed slot of described two symmetries and seal face normal is identical, direction is opposite, and the scope of angle α is 0<| α |≤60 °; Splayed shape chute inner radius has an annular groove and its perforation; There is a sealing dam annular groove inboard.
Structural feature of the present utility model also is:
One group of splayed shape chute is set on the seal face of stationary ring, this group splayed shape chute evenly distributes along the circumferencial direction of seal face, each splayed shape chute is made up of the skewed slot of two symmetries, the angle α size of the skewed slot of described two symmetries and seal face normal is identical, direction is opposite, and the scope of angle α is 0<| α |≤60 °; Splayed shape chute inner radius has an annular groove and its perforation; There is a sealing dam annular groove inboard.
The groove depth of splayed shape chute and annular groove is identical, is 1~2mm.
The salable collection dress axle sleeve that is solidly set on the turning axle is set, and described rotating ring and stationary ring collection are contained on the collection dress axle sleeve.
The utility model form can two-way rotation contact-type do running mechanical seal.
Compared with the prior art, the beneficial effects of the utility model are embodied in:
1, the utility model is contact seal, but under the effect of hydrodynamic, has strengthened the fluid film bearing capacity, has significantly reduced contact load than conventional machinery sealing, reduces wear, and has improved reliability and parts working life of sealability effectively.
2, the utility model is splayed shape chute is set, and irrotationality is installed to requiring, and can two-wayly rotate; The chute that connects forcibly makes resistance envelope gas by sealing surface, the effect that has cooling and remove detritus.
3, groove depth is set is millimetre-sized chute to the utility model seal face, because the degree of depth of groove is big, grooved is simple, workability is good, and this groove is difficult for being stopped up by impurity, do not need configurating filtered unit, is provided with also simpler at other of auxiliary system, make and operation expense thereby greatly reduce, for the assurance that provides favourable is used in gas seal in conventional equipments such as pump, blower fan.
4, the utility model is provided with circumferential groove, can realize the static pressure balance of fluid.
5, the utility model can adopt modular design, stationary ring, rotating ring, collection dress axle sleeve, seal chamber, end cover and auxiliary seal etc. are collected before installation be fitted together, can greatly simplify assembly process, help guaranteeing the reliability of sealability.
Description of drawings:
Fig. 1 produces along slit between turning axle and the mechanical hull to leak schematic representation.
Label among Fig. 1: 1 medium, 2 running shafts, 3 housings, 4 slits.
Fig. 2 is the mechanical seal principle schematic.
Label among Fig. 2: 2 running shafts, 3 housings, 5 Cock screws, 6 spring seats, 7 springs, 8 rotating ring seal rings, 9 rotating rings, 10 stationary rings, 11 stationary ring seal rings.
Fig. 3 does the mechanical sealed structural representation of running for the contact-type of slotting on the rotating ring seal face.
Fig. 4 does the mechanical sealed structural representation of running for the contact-type of slotting on the stationary ring seal face.
Label among Fig. 3,4: 2 running shafts, 5 Cock screws, 7 springs, 8 rotating ring seal rings, 9 rotating rings, 10 stationary rings, 11 stationary ring seal rings, 12 seal chambers, 13 driving pins, 14 end covers, 15 screws, 16 stop pins, 17 collection dress axle sleeves, 18 retaining rings, 19 limiting stoppers, 20 sleeve sealing circles, 21 back-up rings, 22 bolts.
Fig. 5 is the utility model seal face structural representation.
Label among Fig. 5: 23 circumferential groove, 24 chutes, 25 sealing dams, 26 sealing weirs.
Below pass through embodiment, and in conjunction with the accompanying drawings the utility model is further described.
Embodiment:
Referring to Fig. 3,4, the sealing configuration in the present embodiment is made up of seal chamber 12, stationary ring 10, rotating ring 9, driving pin 13, spring 7, end cover 14, screw 15, stop pin 16, collection dress axle sleeve 17, Cock screw 5, retaining ring 18, running shaft 2, limiting stopper 19, stationary ring seal ring 11, sleeve sealing circle 20, rotating ring seal ring 8, back-up ring 21, bolt 22 etc.Rotating ring 9 is fixed on the collection dress axle sleeve 17 through back-up ring 21, rotating ring seal ring 8, driving pin 13.Push stationary ring 10 to rotating ring 9 by spring 7, stationary ring seal ring 11, the stationary ring 10 and the seal face of rotating ring 9 are fitted.Because the effect of stop pin 16, stationary ring 10 can not rotate, and can only move vertically.Above-mentioned part is fitted together by seal chamber 12 and end cover 14, screw 15 collection,, is fixed on the running shaft 2 with Cock screw 5 tightly on the rotating machinery housing by bolt 22, removes limiting stopper 19 then and gets final product.
Referring to Fig. 5, in the present embodiment, the seal face of rotating ring 9 or stationary ring 10 is made up of circumferential groove 23, splayed shape chute 24, sealing dam 25, sealing weir 26.Wherein, splayed shape chute 24 evenly distributes along the circumferencial direction of seal face, each splayed shape chute is made up of the skewed slot of two symmetries, and the angle α size of the skewed slot of two symmetries and seal face normal is identical, direction is opposite, and the scope of angle α is 0<| α |≤60 °; Splayed shape chute 24 inner radius have annular groove 23 and its perforation; The inboard of annular groove 23 is sealing dam 25, and the groove depth of splayed shape chute 24 and annular groove 23 is identical, is 1~2mm.
The utility model as the running parameter of mechanical seal is: Seal cage pressure≤0.8MPa, rotating speed≤4000r/min.

Claims (4)

1. a contact-type is done running mechanical seal, comprises a rotating ring and two stationary rings, and described rotating ring has two seal faces that are parallel to each other, but fits mutually and slide relative with the seal face of two stationary rings respectively, constitutes two motive sealing faces; It is characterized in that on the seal face of described rotating ring, being provided with one group of splayed shape chute, the splayed shape chute evenly distributes along the circumferencial direction of seal face, each splayed shape chute is made up of the skewed slot of two symmetries, the angle α size of the skewed slot of described two symmetries and seal face normal is identical, direction is opposite, and the scope of angle α is 0<| α |≤60 °; Splayed shape chute inner radius has an annular groove and its perforation; There is a sealing dam annular groove inboard.
2. contact-type according to claim 1 is done running mechanical seal, it is characterized in that on the seal face of described stationary ring, being provided with one group of splayed shape chute, this group splayed shape chute evenly distributes along the circumferencial direction of seal face, each splayed shape chute is made up of the skewed slot of two symmetries, the angle α size of the skewed slot of described two symmetries and seal face normal is identical, direction is opposite, and the scope of angle α is 0<| α |≤60 °; Splayed shape chute inner radius has an annular groove and its perforation; There is a sealing dam annular groove inboard.
3. contact-type according to claim 1 and 2 is done running mechanical seal, it is characterized in that the groove depth of described splayed shape chute and annular groove is identical, is 1~2mm.
4. contact-type according to claim 1 is done running mechanical seal, it is characterized in that being provided with the salable collection dress axle sleeve that is solidly set on the turning axle, and described rotating ring and stationary ring collection are contained on the collection dress axle sleeve.
CNU200720041244XU 2007-08-01 2007-08-01 Contact type dry running mechanical sealing CN201068983Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU200720041244XU CN201068983Y (en) 2007-08-01 2007-08-01 Contact type dry running mechanical sealing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU200720041244XU CN201068983Y (en) 2007-08-01 2007-08-01 Contact type dry running mechanical sealing

Publications (1)

Publication Number Publication Date
CN201068983Y true CN201068983Y (en) 2008-06-04

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Country Link
CN (1) CN201068983Y (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102506177A (en) * 2011-10-28 2012-06-20 合肥通用机械研究院 Sealing device with double floating end faces
CN102606735A (en) * 2011-01-21 2012-07-25 昆山密友机械密封有限公司 Sealing device for high-pressure and high-speed reaction kettle
CN102913476A (en) * 2012-11-12 2013-02-06 黄显志 Bidirectional sealing device of centrifugal pump
CN102927287A (en) * 2012-11-12 2013-02-13 南京林业大学 Mechanical end face seal with combined fluid slot structure
CN105351244A (en) * 2015-11-24 2016-02-24 青海盐湖工业股份有限公司 Serial type dry gas sealing device, application of serial type dry gas sealing device to light dydrocarbon pump and application method of serial type dry gas sealing device on light dydrocarbon pump
CN105492516A (en) * 2013-03-22 2016-04-13 3M创新有限公司 Friction-reducing polymer material with dry-running capability and mechanical end-face seal with dry-running capability
CN106468287A (en) * 2015-08-20 2017-03-01 宇航航天装备有限公司 A kind of centrifugal pump specialized high-speed swivel joint
CN106545523A (en) * 2016-10-28 2017-03-29 沈阳透平机械股份有限公司 Prevent the end cover structure and processing method of vertical subdivision compressor operating gas leakage

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102606735A (en) * 2011-01-21 2012-07-25 昆山密友机械密封有限公司 Sealing device for high-pressure and high-speed reaction kettle
CN102506177A (en) * 2011-10-28 2012-06-20 合肥通用机械研究院 Sealing device with double floating end faces
CN102506177B (en) * 2011-10-28 2014-04-30 合肥通用机械研究院 Sealing device with double floating end faces
CN102913476A (en) * 2012-11-12 2013-02-06 黄显志 Bidirectional sealing device of centrifugal pump
CN102927287A (en) * 2012-11-12 2013-02-13 南京林业大学 Mechanical end face seal with combined fluid slot structure
CN105492516A (en) * 2013-03-22 2016-04-13 3M创新有限公司 Friction-reducing polymer material with dry-running capability and mechanical end-face seal with dry-running capability
CN106468287A (en) * 2015-08-20 2017-03-01 宇航航天装备有限公司 A kind of centrifugal pump specialized high-speed swivel joint
CN105351244A (en) * 2015-11-24 2016-02-24 青海盐湖工业股份有限公司 Serial type dry gas sealing device, application of serial type dry gas sealing device to light dydrocarbon pump and application method of serial type dry gas sealing device on light dydrocarbon pump
CN106545523A (en) * 2016-10-28 2017-03-29 沈阳透平机械股份有限公司 Prevent the end cover structure and processing method of vertical subdivision compressor operating gas leakage

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
EE01 Entry into force of recordation of patent licensing contract

Assignee: pressure vessel Testing Station of Hefei General Machinery Research Institute

Assignor: Hefei Universal Machinery Inst.

Contract record no.: 2011340000064

Denomination of utility model: Contact type dry running mechanical sealing

Granted publication date: 20080604

License type: Exclusive License

Record date: 20110628

C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20080604

Termination date: 20130801