CN103016736A - Hydraulic/air pressure controlled mechanical seal device - Google Patents
Hydraulic/air pressure controlled mechanical seal device Download PDFInfo
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- CN103016736A CN103016736A CN2012105576776A CN201210557677A CN103016736A CN 103016736 A CN103016736 A CN 103016736A CN 2012105576776 A CN2012105576776 A CN 2012105576776A CN 201210557677 A CN201210557677 A CN 201210557677A CN 103016736 A CN103016736 A CN 103016736A
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Abstract
The invention relates to a hydraulic/air pressure controlled mechanical seal device which comprises an uncompensated ring assembly and a compensated ring, wherein the uncompensated ring assembly can be rotated along with a shaft, the compensated ring is axially opposite to the uncompensated ring assembly and can be axially floated, and the axially opposite end surfaces can be sealed end surfaces which can be mutually matched; the compensated ring is mutually positioned with a ring seat through an anti-rotating structure, and a floating movement space is kept between the non-sealed axial end of the compensated ring and the matching position with the ring seat; and in positions of the inner and outer circumferential surfaces of the compensated ring which is matched with the ring seat, the floating movement space in the non-sealed tail end part of the compensated ring is respectively formed into a sealed space through a sealed structure, and the sealed space is connected with a fluid pressure adjusting and controlling unit which is arranged outside the device and can be connected with a pressure fluid source through a passage which penetrates through the ring seat. According to the hydraulic/air pressure controlled mechanical seal device, air and/or hydraulic fluid is led into the sealed space, so as to provide compensatory pressure for the compensated ring, elastic elements such as a spring in a traditional structure are cancelled, and a mode that the led pressure fluid is controlled and adjusted can be adopted, so as to realize external adjustment of specific pressure of the mechanical sealed end surface and guarantee the sealing performance.
Description
Technical field
The present invention relates to a kind of face seals of rotating equipment, be applicable to comprising the end face seal of 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, formed by 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 fitting and relative sliding to end face, consist of the device that prevents fluid leakage.The basic principle of conventional springs stationary mechanical sealing device and structure are as shown in Figure 1, include that be installed on the axle can be with the uncompensated ring assembly (1) of axle (16) rotation, and through the rotation prevention structure (5) of the appropriate formats such as lug with ring seat (8) location and installation and can make vertically the compensated loop (2) that suitably floats, between uncompensated ring and compensated loop axially relative end face be its seal face that can cooperatively interact, between the matching part of the non-tight axial end of compensated loop and ring seat, maintain suitable unsteady space, and between ring seat (or gland) and compensated loop, be combined with the cylindrical spring with suitable elastic force, taper spring, the 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 applying between seal face, and the O type that between compensated loop and gland, is provided with, V-type, under the common cooperation of the corresponding form auxiliary seal ring such as wedge shape, prevent fluid leakage.
Above-mentioned traditional form mechanical seal device has the improved deficiency of many needs.At first be when mounted, can provide suitable elastic force for making spring, need 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 aggravated; Decrement is too small, then can make because elastic force is not enough seal face adhesive force under pressure medium sealing effect variation that makes less than normal.Therefore, need the working depth of repeated measurement and calculating machine sealing during on-the-spot the installation, error can not exceed design load ± 0.5mm, installation requirement is high, is prone to error is installed, efficient is low.And, also often larger accommodation space need be arranged for placing elastic element, make the conventional mechanical seal shaft to longer dimension.Because its actual installing space is limited, thereby often has the situation of attenuate size design, cause the product strength variation.
Next is in equipment operation using process, because the less 3 ~ 5mm of spring Normal squeezing amount, and can only provide fixing elastic force (generally being designed to mean value), comparatively responsive to axial float, poor anti jamming capability, so its sealability and effect are subject to the impact of pressure surge in the using process.Particularly to often having the occasion of pressure surge such as reactor etc., and have the large axially use occasion of play, because the spring pressure of traditional mechanical seal fixes, might cause seal face to be opened losing efficacy and produced leaking.And the elastic element material is subjected to the repeatedly alternate load effect of axial float easily to produce tired surrender, affects the working life of whole mechanical seal.And during the situation that occurs adjusting in running, the conventional seals device is because of regulating from the outside, can only shut down the dismounting disintegration after, change its running state by the mode of adjusting its mounting point.
Summary of the invention
Given this, the invention provides a kind of brand-new mechanical seal device, can be satisfied with solves the problems referred to above of conventional seals device.
The mechanical seal device of liquid/gas pressure-controlled of the present invention includes the uncompensated ring assembly that can rotate with the axis equally with axially relative and can make the compensated loop of axial float with it in the basic structure, its axially relative end face be the seal face that can cooperatively interact.Compensated loop is located mutually through suitable rotation prevention structure and ring seat, and maintains unsteady space between the matching part of its unsealed axial end and ring seat.Wherein, side face position, inside and outside footpath at the compensated loop that matches with ring seat, make the unsteady space of its non-tight tail end become a confined space through sealing configuration (such as the seal ring of form commonly used etc.) respectively, but and outside making the passage of this confined space through running through ring seat and installing the hydrodynamic pressure regulation unit of Bonding pressure fluid source be connected.
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 cancelled tradition for the elastic element that elastic thrust is provided to compensated loop, using instead can be by the outer fluid spring that forms by fluids such as the adjustable gas of the pressure that passes in this confined space and/or liquid of device, make the seal face sealing bonded to each other of compensated loop and uncompensated ring, thereby realized and in operation process, to have made things convenient for, regulate rapidly the Operational Limits of mechanical seal, guarantee and improved the sealability effect, enlarged its applicable scope 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.For example, can be for directly be connected and be provided with the pipeline structure of control valve, pressure indication structure and pressure fluid regulation structure with pressure fluid source.
Another kind is mode preferably, is that this hydrodynamic pressure regulation unit is to include the fluid container structure that can be connected with pressure fluid source through control valve, pressure indication structure and pressure fluid regulation structure.The remarkable effect that this fluid container structure arranges, when being the seal failure in equipment, rising or the decline of liquid level in the structure of container that the inefficacy by the different sealing position causes can be monitored and judge sealing condition.Simultaneously, this structure of container can also prevent that to buffering and the collecting action of the medium that leaks out the medium of system leak from entering atmosphere, thus more safety and environmental protection.
When adopting the hydrodynamic pressure regulation unit of above-mentioned optimal way, the control valve in the said hydrodynamic pressure regulation unit, a kind of optimal way are to comprise the one-way valve and the 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 to be adopted as the bottom fill liquid, the hybrid structure of container of gas/liquid of top Bonding pressure source of the gas.
On the said structure basis, in the mechanical seal device of the above-mentioned form of the present invention, can also in the communicating passage between said hydrodynamic pressure regulation unit and confined space a buffer cavity 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 behind stationary ring to produce, replaced and adopted elastic element that the mode of end-acted power is provided in the conventional construction, not only can realize compensated loop is applied the purpose of elastic thrust, and can realize the purpose outside installing, this elastic thrust adjusted, solved the defective of above-mentioned conventional mechanical sealing, the working life of prolonged mechanical sealing, and can be applicable to the application of large axial float, be specially adapted to such as reactor mechanical seal, the working pressures such as the tail stalk seal of steamer are the occasion of fluctuation often, and test occasion, regulate easily the size of compensatory pressure, make sealing keep best running state.
Below in conjunction with the embodiment by the 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 only limits to following example.Do not breaking away from the above-mentioned technological thought situation of the present invention, various replacements or change according to ordinary skill knowledge and customary means are made all should comprise within the scope of the invention.
Description of drawings
Fig. 1 is the schematic representation 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 the liquid/gas pressure-controlled mechanical seal device of the present invention shown in Figure 2, including equally can be with the uncompensated ring assembly 1 of axle 16 rotation, and axially relative and can make the compensated loop 2 of axial float with it, and its relative axial end is the seal face that can cooperatively interact.Compensated loop 2 is through rotation prevention structures such as stop pin 5 and ring seat 8 mutual location and installation, and maintains unsteady space between the matching part of the non-tight axial end of compensated loop 2 and ring seat 8.At the side face position, inside and outside footpath of the compensated loop 2 that matches with ring seat 8, through sealing configurations such as corresponding inner seal circle 3 and outside seal rings 4, make the unsteady space of compensated loop 2 non-tight tail ends form a confined space 6 respectively.Simultaneously, this confined space 6 is through running through the passage 17 of ring seat 8 and gland 10, but is connected with the hydrodynamic pressure regulation unit that is arranged at the outer Bonding pressure gas of device or liquid equal pressure fluid source.This hydrodynamic pressure regulation unit shown in the figure, be a kind of indication structure 13 that is provided with the forms such as stop valve 12, pressure gauge, and the fluid regulation structure 15 such as pressure regulator valve and the pipeline structure that directly is connected with pressure fluid source, and in the passage 17 between itself and the confined space 6 at gland 10 positions, also be provided with a buffer cavity 18.Ring seat 8 is connected with gland through bolt 9 connections, is provided with corresponding ring seat seal ring 7 therebetween and in the usual way.
Shown in Figure 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 Figure 2 mainly be: in the said hydrodynamic pressure regulation unit, between the pipeline structure and buffer cavity 18 that are provided with the indication structures 13 such as control valve, pressure gauge and fluid regulation structure 15, but also be provided with the fluid container structure 11 of the hybrid container tank form of gas/liquid that its underpart fill liquid, top be connected with pressure gas source.Control valve in the said pipeline comprises the one-way valve 14 and the stop valve 12 that are separately positioned on pressure indication structure 13 front and back ends, and this one-way valve 14 prevents in the time of can seal leakage occuring that the liquid in the buffer cavity 18 from playing a reversed role into gas piping.
Claims (6)
1. the mechanical seal device of liquid/gas pressure-controlled, include can with the uncompensated ring assembly (1) of axle (16) rotation with its axial relative compensated loop (2) that also can make axial float, its axial relative end face seal face for cooperatively interacting, compensated loop (2) is located mutually through rotation prevention structure (5) and ring seat (8), between the matching part of its non-tight axial end and ring seat (8), maintain unsteady space, it is characterized in that in the compensated loop (2) that matches with ring seat (8), external diameter side face position, respectively through sealing configuration (3,4) make the unsteady space of its non-tight tail end become confined space (6), and make this confined space (6) through running through ring seat (8) passage (17) but be connected with the hydrodynamic pressure regulation unit of Bonding pressure fluid source outside the device.
2. mechanical seal device as claimed in claim 1 is characterized in that said hydrodynamic pressure regulation unit is for directly being connected and being provided with the pipeline structure of control valve (12), pressure indication structure (13) and pressure fluid regulation structure (15) with pressure fluid source.
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, 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 in the said hydrodynamic pressure regulation unit comprises one-way valve (14) and the stop valve (12) that is 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 the 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. such as the described mechanical seal device of one of claim 1 to 5, it is characterized in that in the communicating passage (17) of said hydrodynamic pressure regulation unit and confined space (6), being provided with a buffer cavity (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
|---|---|---|---|
| CN201210557677.6A CN103016736B (en) | 2012-12-20 | 2012-12-20 | The mechanical seal device of liquid/gas pressure-controlled |
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| CN103016736A true CN103016736A (en) | 2013-04-03 |
| CN103016736B 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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Cited By (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 |
| CN107401678A (en) * | 2017-08-15 | 2017-11-28 | 中铁工程装备集团有限公司 | Full Pneumatic pressure compensation control system |
| 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 |
| 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 |
| CN113813042A (en) * | 2021-10-22 | 2021-12-21 | 杭州维纳安可医疗科技有限责任公司 | Electrode needle and electrode device |
| CN116428364A (en) * | 2023-06-13 | 2023-07-14 | 仪征市恒泰无纺机械有限公司 | Spindle sealing mechanism for needling machine |
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| 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 |
| CN107401678A (en) * | 2017-08-15 | 2017-11-28 | 中铁工程装备集团有限公司 | Full Pneumatic pressure compensation control system |
| 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 |
| CN113813042A (en) * | 2021-10-22 | 2021-12-21 | 杭州维纳安可医疗科技有限责任公司 | Electrode needle and electrode 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 |
| CN116428364A (en) * | 2023-06-13 | 2023-07-14 | 仪征市恒泰无纺机械有限公司 | Spindle sealing mechanism for needling machine |
| 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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| CN103016736B (en) | 2015-09-09 |
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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. |