CN202992171U - Hydraulic/pneumatic controlled mechanical sealing device - Google Patents
Hydraulic/pneumatic controlled mechanical sealing device Download PDFInfo
- Publication number
- CN202992171U CN202992171U CN 201220709506 CN201220709506U CN202992171U CN 202992171 U CN202992171 U CN 202992171U CN 201220709506 CN201220709506 CN 201220709506 CN 201220709506 U CN201220709506 U CN 201220709506U CN 202992171 U CN202992171 U CN 202992171U
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- pressure
- ring
- mechanical seal
- compensating
- ring seat
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Abstract
A hydraulic/pneumatic controlled mechanical sealing device comprises a non-compensating ring component capable of rotating along a shaft, and a compensating ring opposite to the axial direction of the non-compensating ring and capable of axially floating. Axially-opposite end faces of the non-compensating ring component and the compensating ring are sealing end faces capable of matching with each other, the compensating ring is mutually positioned with a ring seat through an anti-rotating structure, a floating motion space is maintained between a non-sealed axial end of the compensating ring and a matched position of the ring seat, on inner and outer peripheries of the compensating ring which is matched with the ring seat, floating motion spaces at non-sealed tail ends of the compensating ring are enabled to be hermetic spaces respectively through sealing structures, and the hermetic spaces are enabled to be connected with a fluid pressure adjusting control unit positioned outside the device and capable of being connected with a pressure fluid source through a passage penetrating through the ring seat. By feeding gas and/or liquid pressure fluid into the hermetic spaces to provide compensating pressure for the compensating ring, elastic elements such as springs in conventional structures are omitted, and guarantee of external adjustablility and sealability of specific pressure of mechanical sealing end faces can be realized by controlling and adjusting modes of pressure fluid feeding.
Description
Technical field
The utility model relates to a kind of face seals of rotating equipment, is 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 axle can be with the uncompensated ring assembly (1) of axle (16) rotation, and also can make vertically suitably unsteady compensated loop (2) through the rotation prevention structure (5) of the appropriate formats such as lug with ring seat (8) location and installation, 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 be combined with the cylindrical spring with suitable elastic force between ring seat (or gland) and compensated loop, 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 is provided with between compensated loop and gland, 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, 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 the situation of attenuate size design is often arranged, cause the product strength variation.
Next is in equipment operation using process, due to 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 in using process, its sealability and effect are subject to the impact of pressure surge.Particularly to often having the occasion of pressure surge as reactor etc., and have the large axially use occasion of play, because the spring pressure of traditional mechanical seal is fixed, might cause seal face to be opened losing efficacy and produced leaking.And the elastic element material is subjected to the effect of alternate load repeatedly of axial float easily to produce tired surrender, the working life of the whole mechanical seal of impact.And during the situation that occurs adjusting in running, the conventional seals device after can only shutting down the dismounting disintegration, changes its running state by the mode of adjusting its mounting point because of regulating from the outside.
The model utility content
Given this, the utility model provides a kind of brand-new mechanical seal device, can be satisfied with to solve the problems referred to above of conventional seals device.
The mechanical seal device of liquid/gas pressure-controlled of the present utility model 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 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 (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 utility model, 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 of 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 to have facilitated in operation process, 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 utility model, 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, in the structure of container that the inefficacy by the different sealing position causes, rising or the decline of liquid level, can monitor and judge sealing condition.Simultaneously, buffering and the collecting action of this structure of container to the medium that leaks out can also prevent that the medium of system leak from entering atmosphere, 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 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 utility model, 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 utility model utilizes air pressure and/or the hydraulic pressure floating space Seal cage after 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 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 utility model is described in further detail again.But this should be interpreted as that the scope of the above-mentioned theme of the utility model only limits to following example.Do not breaking away from the above-mentioned technological thought situation of the utility model, various replacements or change according to ordinary skill knowledge and customary means are made all should be included in scope of the present utility model.
Description of drawings
Fig. 1 is the schematic diagram of conventional springs state type mechanical seal basic structure.
Fig. 2 is a kind of structural representation of the utility model liquid/gas pressure-controlled mechanical seal device.
Fig. 3 is the another kind of structural representation of the utility model liquid/gas pressure-controlled mechanical seal device.
Embodiment
In the utility model liquid/gas pressure-controlled mechanical seal device shown in Figure 2, including equally can be with the uncompensated ring assembly 1 of axle 16 rotations, and axially relative and can make the compensated loop 2 of axial float with it, 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 the mutual location and installation of ring seat 8, 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 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 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 the utility model liquid/gas pressure-controlled mechanical seal device.With the difference of structure shown in Figure 2 be mainly: in 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 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 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), maintain unsteady space between the matching part of its non-tight axial end and ring seat (8), 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 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 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 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. 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 |
|---|---|---|---|
| CN 201220709506 CN202992171U (en) | 2012-12-20 | 2012-12-20 | Hydraulic/pneumatic controlled mechanical sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220709506 CN202992171U (en) | 2012-12-20 | 2012-12-20 | Hydraulic/pneumatic controlled mechanical sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202992171U true CN202992171U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220709506 Withdrawn - After Issue CN202992171U (en) | 2012-12-20 | 2012-12-20 | Hydraulic/pneumatic controlled mechanical sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202992171U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016736A (en) * | 2012-12-20 | 2013-04-03 | 四川日机密封件股份有限公司 | Hydraulic/air pressure controlled mechanical seal device |
| CN106015579A (en) * | 2016-07-15 | 2016-10-12 | 清华大学 | Mechanical sealing device based on active control of throttling structure |
| CN112178219A (en) * | 2020-09-08 | 2021-01-05 | 苏州仁甬得物联科技有限公司 | Floating precision flow valve control mechanism |
-
2012
- 2012-12-20 CN CN 201220709506 patent/CN202992171U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016736A (en) * | 2012-12-20 | 2013-04-03 | 四川日机密封件股份有限公司 | Hydraulic/air pressure controlled mechanical seal device |
| CN103016736B (en) * | 2012-12-20 | 2015-09-09 | 四川日机密封件股份有限公司 | The mechanical seal device of liquid/gas pressure-controlled |
| CN106015579A (en) * | 2016-07-15 | 2016-10-12 | 清华大学 | Mechanical sealing device based on active control of throttling structure |
| CN106015579B (en) * | 2016-07-15 | 2018-08-28 | 清华大学 | A kind of mechanically-sealing apparatus based on throttle structure active control |
| CN112178219A (en) * | 2020-09-08 | 2021-01-05 | 苏州仁甬得物联科技有限公司 | Floating precision flow valve control mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130612 Effective date of abandoning: 20150909 |
|
| RGAV | Abandon patent right to avoid regrant |