CN103016736B - The mechanical seal device of liquid/gas pressure-controlled - Google Patents
The mechanical seal device of liquid/gas pressure-controlled Download PDFInfo
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- CN103016736B CN103016736B CN201210557677.6A CN201210557677A CN103016736B CN 103016736 B CN103016736 B CN 103016736B CN 201210557677 A CN201210557677 A CN 201210557677A CN 103016736 B CN103016736 B CN 103016736B
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Abstract
The mechanical seal device of liquid/gas pressure-controlled, include the uncompensated ring assembly and the compensated loop that also can make axial float relative to its axis that can rotate with the axis, its axial relative end face is the seal face that can cooperatively interact.Compensated loop is located mutually through rotation prevention structure and ring seat, between the matching part of its non-tight axial end and ring seat, maintain floating motion space.At the side face position, inside and outside footpath of the compensated loop matched with ring seat, make the floating motion space of its non-tight tail end become confined space through sealing configuration respectively, and the passage of this confined space through running through ring seat can the hydrodynamic pressure regulation unit of Bonding pressure fluid source be connected with outside device.Liquid/gas pressure-controlled mechanical seal device of the present invention to afford redress pressure to compensated loop by passing into gas and/or hydraulic coupling fluid to this confined space, cancel the elastic elements such as the spring in conventional construction, and by controlling and regulating the mode of pressure fluid of passing into, realize the guarantee of the adjustable and sealability in the outside of mechanical seal end surface specific pressure.
Description
Technical field
The present invention relates to a kind of face seals of rotating equipment, being applicable to the end face seal to comprising the fluid machinery running shafts such as various compressor, reactor, pump.
Background technique
Mechanical seal is a kind of gland seal device for rotary fluid machine, be made up of at least one pair of end face perpendicular to spin axis, under hydrodynamic pressure and compensation mechanism elastic force (or magnetic force) acting in conjunction, and under the cooperation of auxiliary seal ring, make this keep laminating and relative sliding to end face, form the device that anti-fluid is leaked.The basic principle of conventional springs stationary mechanical sealing device and structure are as shown in Figure 1, include the uncompensated ring assembly (1) being installed on and axle can rotate with axle (16), and also can make suitably floating compensated loop (2) vertically through the rotation prevention structure (5) of the appropriate formats such as lug with ring seat (8) location and installation, between uncompensated ring with compensated loop, axially relative end face is the seal face that it can cooperatively interact, between the non-tight axial end of compensated loop and the matching part of ring seat, maintain suitable floating motion space, and the cylindrical spring with suitable elastic force is combined with between ring seat (or gland) and compensated loop, taper spring, wave plate spring, the elastic elements such as bellows (19), for compensated loop provides elastic thrust, make compensated loop under spring force and pressure medium acting in conjunction, keep the laminating between seal face, and the O type be provided with between compensated loop and gland, V-type, under the common cooperation of the corresponding form such as wedge shape auxiliary seal ring, anti-fluid is leaked.
Above-mentioned traditional form mechanical seal device has many deficiencies needing to improve.First being when mounted, is the elastic force making spring can provide suitable, needs to guarantee that the elastic elements such as spring are subject to enough compressions.Decrement is excessive, and the wearing and tearing of seal face can be made to aggravate; Decrement is too small, then can seal face adhesive force under pressure medium be made less than normal because elastic force is not enough and sealing effect is deteriorated.Therefore, need the working depth of repeated measurement and calculating machine sealing during in-site installation, error can not exceed design load ± 0.5mm, installation requirement is high, and easily occur installing error, efficiency is low.And, also often need there is larger accommodation space for placing elastic element, making conventional mechanical seal shaft to longer dimension.Because its actual installing space is limited, thus often there is the situation of thinning size design, cause product strength to be deteriorated.
Next runs in using process at equipment, due to the less 3 ~ 5mm of spring Normal squeezing amount, and fixing elastic force (being generally designed to mean value) can only be provided, comparatively responsive to axial float, poor anti jamming capability, therefore in using process, its sealability and effect are subject to the impact of pressure surge.Particularly the occasion of pressure surge is often existed to such as reactor etc., and there is the use occasion of large axial float, because the spring pressure of traditional mechanical seal is fixed, likely cause seal face open failure and produce leakage.And elastic element material is subject to the effect of alternate load repeatedly of axial float easily to produce fatigue yield, affects the working life of whole mechanical seal.And when occurring carrying out situation about adjusting in running, conventional sealing apparatus, because cannot regulating from outside, after can only shutting down dismounting disintegration, changes its running state by the mode adjusting its mounting point.
Summary of the invention
Given this, the invention provides a kind of brand-new mechanical seal device, the problems referred to above solving conventional sealing apparatus can be satisfied with.
The mechanical seal device of liquid/gas pressure-controlled of the present invention, include the uncompensated ring assembly and the compensated loop that also can make axial float relative to its axis that can rotate with the axis in basic structure equally, its axial relative end face is the seal face that can cooperatively interact.Compensated loop is located mutually through suitable rotation prevention structure and ring seat, and maintains floating motion space between the matching part of its unsealed axial end and ring seat.Wherein, at the side face position, inside and outside footpath of the compensated loop matched with ring seat, make the floating motion space of its non-tight tail end become a confined space through sealing configuration (seal ring etc. as common type) respectively, and the passage of this confined space through running through ring seat can the hydrodynamic pressure regulation unit of Bonding pressure fluid source be connected with outside device.
In the structure of the above-mentioned mechanical seal device of the present invention, floating space between the matching part of compensated loop non-tight axial end and ring seat is set to a confined space, and eliminate the elastic element being conventionally used to and elastic thrust is provided to compensated loop, using instead can by device outward by fluid spring that the fluids such as the gas of pressure adjustable that passes in this confined space and/or liquid are formed, make the sealing bonded to each other of the seal face of compensated loop and uncompensated ring, thus achieve and can facilitate in operation process, regulate the Operational Limits of mechanical seal rapidly, ensure and improve sealability effect, expand its scope be suitable for and flexibility.
In the above-mentioned seal arrangement of the present invention, the concrete form of said hydrodynamic pressure regulation unit can have different selections.Such as, can for being directly connected with pressure fluid source and being provided with the pipeline structure of control valve, pressure indication structure and pressure fluid regulation structure.
Another kind can preferred mode, be this hydrodynamic pressure regulation unit is include the fluid container structure that can be connected with pressure fluid source through control valve, pressure indication structure and pressure fluid regulation structure.A remarkable effect of this fluid container vibrational power flow, when being seal failure in a device, in the structure of container caused by the inefficacy at different sealing position, the rising of liquid level or decline, can monitor sealing condition and judge.Meanwhile, this structure of container, to the buffering of the medium leaked out and collecting action, can also prevent the medium of system leak from entering air, thus safety and environmental protection more.
When adopting the hydrodynamic pressure regulation unit of above-mentioned optimal way, the control valve in said hydrodynamic pressure regulation unit, a kind of optimal way is, comprises the one-way valve and stop valve that are separately positioned on pressure indication structure front and back ends.
In addition, the form of above-mentioned fluid container structure can be the container of filling single liquid or pure gas.Preferred mode is adopted as bottom fill liquid, the hybrid structure of container of gas/liquid of top Bonding pressure source of the gas.
On said structure basis, state on the invention in the mechanical seal device of form, in the communicating passage between said hydrodynamic pressure regulation unit and confined space, a buffer cavity can also be set further.
Be appreciated that by foregoing, the pressure that seal arrangement of the present invention utilizes air pressure and/or the hydraulic pressure floating space Seal cage after stationary ring to produce, instead of in conventional construction the mode adopting elastic element to provide end face active force, not only can realize object compensated loop being applied to elastic thrust, and can realize from device the object that this elastic thrust adjusts, solve the defect of above-mentioned conventional mechanical sealing, the working life of prolonged mechanical sealing, and the application of large axial float can be applicable to, be specially adapted to as reactor mechanical seal, the occasion that the tail stalk seal of steamer etc. use pressure often to fluctuate, and test occasion, regulate the size of compensatory pressure easily, make the running state that sealing keeps best.
Below in conjunction with the embodiment by accompanying drawing illustrated embodiment, foregoing of the present invention is described in further detail again.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following example.Without departing from the idea case in the present invention described above, the various replacement made according to ordinary skill knowledge and customary means or change, all should comprise within the scope of the invention.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of conventional springs state type mechanical seal basic structure.
Fig. 2 is a kind of structural representation of liquid/gas pressure-controlled mechanical seal device of the present invention.
Fig. 3 is the another kind of structural representation of liquid/gas pressure-controlled mechanical seal device of the present invention.
Embodiment
In liquid/gas pressure-controlled mechanical seal device of the present invention shown in Fig. 2, include the uncompensated ring assembly 1 that can rotate with axle 16 equally, and the compensated loop 2 that also can make axial float relative to its axis, its relative axial end is the seal face that can cooperatively interact.Compensated loop 2 through the rotation prevention structures such as stop pin 5 and ring seat 8 location and installation mutually, and maintains floating motion space between the non-tight axial end of compensated loop 2 and the matching part of ring seat 8.At the side face position, inside and outside footpath of the compensated loop 2 matched with ring seat 8, respectively through sealing configurations such as corresponding inner seal circle 3 and outer side seal circles 4, the floating motion space of compensated loop 2 non-tight tail end is made to be formed as a confined space 6.Meanwhile, this confined space 6, through running through the passage 17 of ring seat 8 and gland 10, and to be arranged at outside device and can the hydrodynamic pressure regulation unit of Bonding pressure gas or liquid equal pressure fluid source to be connected.This hydrodynamic pressure regulation unit shown in figure, for a kind of indication structure 13 being provided with the form such as control valve 12, pressure gauge of stop valve form, and the fluid regulation structure 15 such as pressure regulator valve and the pipeline structure that is directly connected with pressure fluid source, and in the passage 17 between itself and the confined space 6 at gland 10 position, be also provided with a buffer cavity 18.Ring seat 8 is connected through bolt 9 with gland 10, therebetween and be provided with corresponding ring seat seal ring 7 in the usual way.
Shown in Fig. 3 is the another kind of structural type of liquid/gas pressure-controlled mechanical seal device of the present invention.With the difference of structure shown in Fig. 2 mainly: in said hydrodynamic pressure regulation unit, be provided with between the pipeline structure of the indication structure such as control valve, pressure gauge 13 and fluid regulation structure 15 and buffer cavity 18, being also provided with an its underpart can the fluid container structure 11 of the hybrid container tank form of gas/liquid that is connected with pressure gas source of fill liquid, top.Control valve in said pipeline, comprises the control valve 12 such as one-way valve 14 and stop valve being separately positioned on pressure indication structure 13 front and back ends, prevents the liquid in buffer cavity 18 from playing a reversed role into gas piping when seal leakage can occur this one-way valve 14.
Claims (6)
1. the mechanical seal device of liquid/gas pressure-controlled, include the uncompensated ring assembly (1) and the compensated loop (2) that also can make axial float relative to its axis that can rotate with axle (16), its axial relative end face is the seal face that can cooperatively interact, compensated loop (2) is located mutually through rotation prevention structure (5) and ring seat (8), floating motion space is maintained between the matching part of its non-tight axial end and ring seat (8), it is characterized in that in the compensated loop (2) matched with ring seat (8), external diameter side face position, respectively through sealing configuration (3, 4) the floating motion space of its non-tight tail end is made to become confined space (6), and the passage (17) of this confined space (6) through running through ring seat (8) can the hydrodynamic pressure regulation unit of Bonding pressure fluid source be connected with outside device.
2. mechanical seal device as claimed in claim 1, is characterized in that said hydrodynamic pressure regulation unit be directly connected with pressure fluid source and be provided with the pipeline structure of control valve (12), pressure indication structure (13) and pressure fluid regulation structure (15).
3. mechanical seal device as claimed in claim 1, is characterized in that said hydrodynamic pressure regulation unit includes the fluid container structure (11) that can be connected with pressure fluid source through control valve (12), pressure indication structure (13) and pressure fluid regulation structure (15).
4. mechanical seal device as claimed in claim 3, is characterized in that the control valve (12) in said hydrodynamic pressure regulation unit comprises the one-way valve (14) and stop valve that are separately positioned on pressure indication structure (13) front and back ends.
5. mechanical seal device as claimed in claim 3, is characterized in that the fluid container structure (11) in said hydrodynamic pressure regulation unit is bottom fill liquid, the hybrid structure of container of gas/liquid of top Bonding pressure source of the gas.
6. the mechanical seal device as described in one of claim 1 to 5, is characterized in that being provided with a buffer cavity (18) in the communicating passage (17) of said hydrodynamic pressure regulation unit and confined space (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210557677.6A CN103016736B (en) | 2012-12-20 | 2012-12-20 | The mechanical seal device of liquid/gas pressure-controlled |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210557677.6A CN103016736B (en) | 2012-12-20 | 2012-12-20 | The mechanical seal device of liquid/gas pressure-controlled |
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| CN103016736A CN103016736A (en) | 2013-04-03 |
| CN103016736B true CN103016736B (en) | 2015-09-09 |
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| CN201210557677.6A Active CN103016736B (en) | 2012-12-20 | 2012-12-20 | The mechanical seal device of liquid/gas pressure-controlled |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329459A (en) * | 2014-09-25 | 2015-02-04 | 天津西澳维密封技术发展有限公司 | Pressure tracking liquid sealing tank system and method for realizing constant pressure of mechanical sealing structure |
| WO2018014286A1 (en) * | 2016-07-21 | 2018-01-25 | 北京化工大学 | Regulation and control system and method for self-healing of rotary compressor in abnormal state |
| CN107401678B (en) * | 2017-08-15 | 2023-04-25 | 中铁工程装备集团有限公司 | Full pneumatic pressure compensation control system |
| CN111779837A (en) * | 2020-07-15 | 2020-10-16 | 北京建筑大学 | Dynamic regulation and control method and device suitable for magnetorheological fluid sealing |
| CN113714777A (en) * | 2021-08-20 | 2021-11-30 | 成都一通密封股份有限公司 | Floating seal assembly mounting device, mounting method, detection method and detection device |
| CN113813042B (en) * | 2021-10-22 | 2023-12-05 | 杭州维纳安可医疗科技有限责任公司 | Electrode needle and electrode device |
| CN116428364B (en) * | 2023-06-13 | 2023-08-18 | 仪征市恒泰无纺机械有限公司 | Spindle sealing mechanism for needling machine |
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| US5203575A (en) * | 1990-11-28 | 1993-04-20 | Awchesterton Company | Balanced mechanical seal assembly and flow ring therefor |
| US5490679A (en) * | 1993-12-20 | 1996-02-13 | John Crane Inc. | Seal ring design |
| CN201288822Y (en) * | 2008-11-13 | 2009-08-12 | 宁波方力密封件有限公司 | Mechanical seal |
| CN201772063U (en) * | 2010-08-12 | 2011-03-23 | 上海乐合流体机械有限公司 | Antiscour mechanical sealing device |
| CN202992171U (en) * | 2012-12-20 | 2013-06-12 | 四川日机密封件股份有限公司 | Hydraulic/pneumatic controlled mechanical sealing device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6454268B1 (en) * | 2001-02-09 | 2002-09-24 | Eagle Industry Co., Ltd. | Shaft seal device |
| JP5580532B2 (en) * | 2006-07-25 | 2014-08-27 | イーグル工業株式会社 | Mechanical seal device |
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- 2012-12-20 CN CN201210557677.6A patent/CN103016736B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5203575A (en) * | 1990-11-28 | 1993-04-20 | Awchesterton Company | Balanced mechanical seal assembly and flow ring therefor |
| US5490679A (en) * | 1993-12-20 | 1996-02-13 | John Crane Inc. | Seal ring design |
| CN201288822Y (en) * | 2008-11-13 | 2009-08-12 | 宁波方力密封件有限公司 | Mechanical seal |
| CN201772063U (en) * | 2010-08-12 | 2011-03-23 | 上海乐合流体机械有限公司 | Antiscour mechanical sealing device |
| CN202992171U (en) * | 2012-12-20 | 2013-06-12 | 四川日机密封件股份有限公司 | Hydraulic/pneumatic controlled mechanical sealing device |
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| CN103016736A (en) | 2013-04-03 |
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Address after: Vuko Xisi road Chengdu City, Sichuan province 610045 No. 8 Patentee after: Zhongmi Holding Co., Ltd Address before: Vuko Xisi road Chengdu City, Sichuan province 610045 No. 8 Patentee before: Sichuan Sunny Seal Co., Ltd. |