CN108302204A - Adjustable type mechanically-sealing apparatus - Google Patents
Adjustable type mechanically-sealing apparatus Download PDFInfo
- Publication number
- CN108302204A CN108302204A CN201810164845.2A CN201810164845A CN108302204A CN 108302204 A CN108302204 A CN 108302204A CN 201810164845 A CN201810164845 A CN 201810164845A CN 108302204 A CN108302204 A CN 108302204A
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- China
- Prior art keywords
- sealing ring
- sealing
- runner
- valve
- adjustable type
- Prior art date
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- 238000007789 sealing Methods 0.000 title claims abstract description 143
- 230000001105 regulatory effect Effects 0.000 claims abstract description 38
- 239000012188 paraffin wax Substances 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 17
- 230000002035 prolonged effect Effects 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 16
- 230000008859 change Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000565 sealant Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 230000009102 absorption Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000010485 coping Effects 0.000 description 2
- 208000002925 dental caries Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000010339 dilation Effects 0.000 description 2
- 229940057995 liquid paraffin Drugs 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910000743 fusible alloy Inorganic materials 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3404—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal
- F16J15/3408—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface
- F16J15/3412—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface with cavities
- F16J15/342—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface with cavities with means for feeding fluid directly to the face
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
The present invention relates to fluid seals technology fields, and more particularly to a kind of adjustable type mechanically-sealing apparatus, including sealing ring, sealing ring is along multiple runners that are circumferentially with of sealing ring, seal face of each runner through the side wall and sealing ring of sealing ring；Runner is corresponded on sealing ring is equipped with regulating valve；Regulating valve includes valve chamber and spool, and spool is slidably disposed in valve chamber；Runner is equipped with the valve port coordinated with spool；Filled with working medium is adjusted in valve chamber, adjusts working medium volume when heated and change and push valve core movement, with opening or close port.The adjustable type mechanically-sealing apparatus can adjust the working condition of mechanical seal under the control of outer signals, and can be worked normally under larger seal pressure differential, while not interfered to the operation of mechanical seal itself.By the multiple combinations pattern of each runner break-make, in different forms, or the working condition of mechanical seal can be adjusted to varying degrees, to meet a variety of adjusting requirements.
Description
Technical field
The present invention relates to fluid seals technology fields, more particularly to a kind of adjustable type mechanically-sealing apparatus.
Background technology
Mechanical seal is a kind of common shaft end seal form in rotating machinery, the rotating ring (dynamic with shaft rotation) of pairing
End face between stationary ring (not dynamic with shaft rotation) forms a layer fluid film.By well-designed, mechanical seal is in certain work item
Under part, when suffered closing force and opening force reach mutual balance, fluid thin film thickness between end face and uniformly, to make fluid
Leakage be extremely limited, while so that the solid contact of rotating ring and stationary ring is weakened and even being eliminated.
However, one side mechanical seal works sometimes under variable working condition, for example, variable speed (contain sealing start,
The process of parking), pressure changeable etc., another aspect mechanical seal can be by such as rigging error, parts aging or damage, accident
The influence of the abnormal factors such as disturbance.These two aspects reason makes mechanical seal actually can't always be to be operated in its high property being designed
Under energy working condition, in some instances it may even be possible to lead to seal failure.If mechanical seal can be controlled according to the instruction of user or/and itself feedback
The instruction of system processed adjusts the working condition of itself, and mechanical seal can be in the operating mode variation range of bigger or more serious
Abnormal factors under keep preferably performance.
Have theory and specific method that some patents propose controllable type sealing：Patent CN101776152A proposes logical
The scheme for being passed through the external air source pressure of sealing air film mechanical seal to be adjusted is overregulated, however works as this scheme application
When being to compensate the sealing of ring with stationary ring, needing high pressure gas being connected to should have on the stationary ring of good floatability, can be right
The floatability of stationary ring causes larger sacrifice.Patent CN104179975A is proposed to be adjusted by applying electromagnetic force to sealing ring
The scheme of mechanical seal, main problem are that the active force that magnetic force may provide on unit area is limited to the magnetization of material
Saturated characteristic, thus put into practice and need huge electromagnet when pressure medium is higher to apply enough regulating forces.
Invention content
Based on this, it is necessary to which, for the active control how solved the problems, such as to mechanical seal, providing one kind can be to machine
The adjustable type mechanically-sealing apparatus that tool sealing is effectively adjusted rapidly.
Above-mentioned purpose is achieved through the following technical solutions：
A kind of adjustable type mechanically-sealing apparatus, including：Sealing ring, sealing ring are circumferentially with multiple runners along sealing ring,
The seal face of side wall and sealing ring of each runner through sealing ring；Runner is corresponded on sealing ring is equipped with regulating valve, regulating valve
Break-make for adjusting runner；
Regulating valve includes valve chamber and spool, and spool is slidably disposed in valve chamber；Runner is equipped with the valve coordinated with spool
Mouthful；Filled with working medium is adjusted in valve chamber, adjust working medium volume when heated and change and push valve core movement, with opening or
Close port.
Runner includes first flow and second flow channel, radial direction of the first flow along sealing ring in one of the embodiments,
Extend, second flow channel is along the axially extending of sealing ring；
Valve port is set to the one end of second flow channel being connect with first flow, and second flow channel is led by valve port and first flow
It is logical.
Regulating valve further includes heating structure in one of the embodiments, and heating structure connects with the adjusting working medium in valve chamber
It touches, working medium is adjusted for heating.
Heating structure is resistance wire in one of the embodiments, one end of resistance wire stretch into valve chamber and with adjust work
Matter contacts, and the other end is connect with heating power supply.
Valve chamber includes the first cavity and the second cavity in one of the embodiments, and the second cavity is close to valve port；Spool is in
Column, spool are slidedly arranged in the second cavity；Working medium filling is adjusted in the first cavity.
The cross-sectional area of the first cavity is more than the cross-sectional area of the second cavity in one of the embodiments,.
Regulating valve further includes end cap in one of the embodiments, and end cap is set to sealing ring, for sealing the first cavity
One end far from the second cavity.
Spool includes valve core and cartridge cover in one of the embodiments, and valve core and cartridge cover are integrally formed；
There is valve core interval, cartridge cover to be formed with interval and be adjusted for filling between the part and valve chamber of cartridge cover
The sealing space of working medium.
It is paraffin to adjust working medium in one of the embodiments,.
Multiple runners are uniformly distributed along the circumferential direction of the sealing ring in one of the embodiments,.
Above-mentioned adjustable type mechanically-sealing apparatus, sealing ring pass through regulating valve circumferentially arranged with multiple runners, each runner
Control break-make.In this way, the adjustable type mechanically-sealing apparatus can adjust the work shape of mechanical seal under the control of outer signals
State.Also, it can be worked normally under larger seal pressure differential, and not interfered to the operation of mechanical seal itself.It is logical
The multiple combinations pattern of each runner break-make is crossed, in different forms, or the work shape of mechanical seal can be adjusted to varying degrees
State, to meet a variety of adjusting requirements.
Description of the drawings
Fig. 1 is the front view for the adjustable type mechanically-sealing apparatus that one embodiment of the invention provides；
Fig. 2 is A-A sectional views in Fig. 1；
Fig. 3 is the structural schematic diagram that adjustable type mechanically-sealing apparatus shown in FIG. 1 is applied to shaft end seal；
Fig. 4 is the front view for the adjustable type mechanically-sealing apparatus that another embodiment of the present invention provides；
Fig. 5 is B-B sectional views in Fig. 4；
Fig. 6 is the structural schematic diagram that adjustable type mechanically-sealing apparatus shown in Fig. 4 adjusts working medium when assembling initial.
Wherein：
100- sealing rings (stationary ring)；101- rotating rings；
110- runners；111- valve ports；112- first flows；113- second flow channels；
200- regulating valves；
210- valve chambers；The first cavitys of 211-；The second cavitys of 212-；
220- spools；221- valve cores；222- cartridge covers；
230- end caps；240- adjusting screws；
300- adjusts working medium；
400- heating structures.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, by the following examples, it and combines attached
The adjustable type mechanically-sealing apparatus of the present invention is further elaborated in figure.It should be appreciated that specific reality described herein
Example is applied only to explain the present invention, is not intended to limit the present invention.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.On the contrary, when element is referred to as " directly existing " another element "upper",
There is no intermediary elements.Term as used herein " vertically ", " horizontal ", "left", "right" and similar statement are
For illustrative purposes.
The adjustable type mechanically-sealing apparatus of the present invention, for the shaft end seal in rotating machinery.Such as Fig. 1 and Fig. 2 institutes
Show, the adjustable type mechanically-sealing apparatus of one embodiment of the invention includes sealing ring 100；
Sealing ring 100 is circumferentially with multiple runners 110 along sealing ring 100, and runner 110 runs through the side wall of sealing ring 100
With the seal face of sealing ring 100；Runner 110 is corresponded on sealing ring 100 and is equipped with regulating valve 200, and regulating valve 200 is flowed for adjusting
The break-make in road 110；
Regulating valve 200 includes valve chamber 210 and spool 220, and spool 220 is slidably disposed in valve chamber 210；Runner 110
Equipped with the valve port 111 coordinated with spool 220；Filled with working medium 300 is adjusted in valve chamber 210, volume when heated of working medium 300 is adjusted
It changes and spool 220 is pushed to move, with opening or close port 111.
Wherein, sealing ring 100 can be the rotating ring moved with shaft rotation, can also be the stationary ring not rotated.Preferably, sealing ring
100 be stationary ring.Referring to Fig. 3, sealing ring 100 is stationary ring, and fluid film is formed between sealing ring 100 and its rotating ring matched 101.
The seal face of side wall and sealing ring 100 of each runner 110 through sealing ring 100.Multiple runners 110 can be
Circumferential direction along sealing ring 100 is uniformly distributed, and fluid is contributed to be uniformly filled in the gap between rotating ring 101 and sealing ring 100 in this way, with
Form uniform fluid film.In one embodiment, runner 110 includes first flow 112 and second flow channel 113,112 edge of first flow
Sealing ring 100 radially extends, and second flow channel 113 is axially extending along sealing ring 100；Valve port 111 is set to second flow channel 113
The one end being connect with first flow 112, second flow channel 113 passes through valve port 111 and first flow 112 and is connected.In this way, can be conducive to
The installation settings of regulating valve 200, and so that the seal face of spool 220 and valve port 111 is the anchor ring of rule so that regulating valve
200 control is more accurate.Certainly, in other embodiments, first flow 112 can also be to be in the radial direction of sealing ring 100
The setting of certain angle.Second flow channel 113 can also be the setting with the axial direction of sealing ring 100 at an angle.
Regulating valve 200 is used to adjust the break-make of runner 110, therefore can be in the control of outer signals by regulating valve 200
The lower working condition for adjusting mechanical seal.For example, the mechanical seal for dynamic pressure effect is utilized, is relatively less than design value in rotating speed
When (this sealing start-stop stage will necessarily occur), sealing dynamic pressure effect is insufficient, and the distribution of fluid film pressure is whole to be less than design value,
Cause two sealing interannulars that serious friction occurs.At this point, each runner 110 can be made to lead by regulating valve 200 when sealing will be started
It is logical, to increase sealing opening force, avoid the contact of rotating ring 101 and sealing ring 100 in starting process.Pass through again after rotating speed is normal
Regulating valve 200 controls the break-make of corresponding runner 110, and thickness is thin and uniform fluid film to be formed, and makes the leakage of fluid by pole
Big limitation, while the solid contact of rotating ring 101 and sealing ring 100 being made to be weakened or even substantially eliminate.
It adjusts working medium 300 and refers to that one kind volume when absorbing heat significantly changes, volume is accordingly restored when dissipated heat
Material.Make adjusting working medium 300 that there is corresponding volume change by so that adjusting working medium 300 is absorbed heat or heat dissipation, to move
Movable valve plug 220 changes the break-make of runner 110.Selectively, it is paraffin to adjust working medium 300.The characteristic of paraffin is melting dilation,
Solidification shrinkage.It is because prodigious volume change (melting dilation rate occurs in phase transformation for paraffin using paraffin as working medium is adjusted
About 11%~15%).And either solid paraffin or liquid paraffin all have Incoercibility, therefore paraffin volume change is to valve
The driving force of core 220 is very big, and driving process can be still normally carried out under very high sealed medium pressure.Certainly, work is adjusted
The stereomutation when heat absorptions such as matter 300 or other materials, such as low-melting alloy, volume is accordingly restored when dissipated heat
Material.
In one embodiment, regulating valve 200 further includes heating structure 400, heating structure 400 and the adjusting work in valve chamber 210
Matter 300 contacts, and working medium 300 is adjusted for heating.Selectively, heating structure 400 is resistance wire, and valve is stretched into one end of resistance wire
It is contacted in chamber 210 and with working medium 300 is adjusted, the other end is connect with heating power supply.When resistance wire heating power, working medium is adjusted
300 heat absorptions, stereomutation are moved so as to cause spool 220 in valve chamber 210.Heat loss after resistance wire power-off, is adjusted
300 volume of working medium is restored, and spool 220 returns.In this way, the movement of spool 220 is just controlled by the on/off of resistance wire electricity.As long as
It adjusts working medium 300 and selects proper, be adjusted prodigious adjusting force can be provided using the effect of heat, it is high so as to overcome
Pressure medium.Simultaneously as this adjusting method comes from sealing medium itself to the regulating power of mechanical seal working condition, because
This regulating power increases with the increase of sealed medium pressure itself.
Corresponding to the on/off electricity of resistance wire, two positions of spool 220 correspond to (the specific design of the on/off of runner 110
When can be：Runner 110 is connected when resistance wire is powered, and accordingly, runner 110 is cut off when resistance wire powers off.Alternatively, resistance wire is disconnected
Runner 110 is connected when electric, and runner 110 is cut off when resistance wire is powered).
The adjustable type mechanically-sealing apparatus of the present embodiment, sealing ring 100 is circumferentially arranged with multiple runners 110, each runner
110 control break-make by regulating valve 200.In this way, the adjustable type mechanically-sealing apparatus can be lowered in the control of outer signals
Save the working condition of mechanical seal.Also, it can be worked normally under larger seal pressure differential, and not to mechanical seal itself
Operation interfere.In addition, as previously mentioned, be provided with multiple runners 110 on sealing ring 100, and each runner 110 is respectively
It is correspondingly provided with regulating valve 200, therefore can be endless all synchro to the control of the break-make of each runner 110, it might even be possible to be complete
It is mutually independent.By the multiple combinations pattern of 110 break-make of each runner, can in different forms, or adjust to varying degrees
The working condition of mechanical seal, to meet a variety of adjusting requirements.
The structure of the adjustable type mechanically-sealing apparatus of the present invention is illustrated with reference to Fig. 1-Fig. 6, and with sealing ring 100
For stationary ring, the course of work that working medium 300 is the adjustable type mechanically-sealing apparatus that paraffin is specifically described the present invention is adjusted.
Implement one
Referring to Fig. 1, Fig. 2 and Fig. 3, sealing ring 100 (stationary ring) is equipped with 6 runners 110, and each runner 110 is both provided with
Regulating valve 200 (a~f).By taking the structure of sealing ring 100 at regulating valve 200a as an example, the right of sealing ring 100 in fig. 2 is it
With the 101 mutually matched seal face of rotating ring of pairing, top is except seal face outer diameter for sealing higher-pressure region, Fig. 2 in Fig. 2
It is sealing low pressure area within middle lower section, that is, seal face internal diameter.
Runner 110 is set on sealing ring 100, and when runner 110 is connected, which becomes sealing higher-pressure region and end face
Internal additional passageway.
In the present embodiment, valve chamber 210 includes the first cavity 211 and the second cavity 212, and the second cavity 212 is close to valve port
111；Spool 220 is in the form of a column, and spool 220 is slidedly arranged in the second cavity 212；Working medium 300 is adjusted to be filled in the first cavity 211.
Wherein, the cross-sectional area of the first cavity 211 is more than the cross-sectional area of the second cavity 212.In this way, adjusting working medium 300 can cover comprehensively
111 one end of separate valve port of lid spool 220, can increase the distance of the movement of spool 220.Further, regulating valve 200 is also wrapped
End cap 230 is included, end cap 230 is set to sealing ring 100, for sealing the one end of the first cavity 211 far from the second cavity 212.End
Lid 230 is connect with sealing ring 100 by the way of sealing.The through-hole for drawing resistance wire, resistance can be offered on end cap 230
Silk is drawn by through-hole from the first cavity 211, and fixation is sealed by fluid sealant between resistance wire and through-hole.In addition, end cap
The screw hole for installation and adjustment screw 240 is further opened on 230.
The adjustable type mechanically-sealing apparatus of the present embodiment is when mounted：First by the seal face of sealing ring 100 towards decentralization
It sets, then spool 220 is fitted into the second cavity 212 to and is shifted onto the position of close port 111, resistance is installed on end cap 230
Silk (and sealing) and adjusting screw 240.Later, the paraffin that fusing is injected into the first cavity 211, then starts to solidify in paraffin
The sealing of end cap 230 is adhesive on sealing ring 100 rapidly before.Should also have under adjusting screw 240 at this time a small amount of not by paraffin
The space filled up is full of air, tightens adjusting screw 240 to which these air threadingly be discharged.Further, end cap 230 is upper
The surrounding of adjusting screw 240 is provided with seal groove, fluid sealant is injected in seal groove, so far the first cavity 211 is by completely close
Envelope.
The adjustable type mechanically-sealing apparatus of the present embodiment is at work：Since 211 inner air of the first cavity was assembling
It is had been discharged in journey, liquid paraffin cooled and solidified when initial, under the action of fluid of the spool 220 in runner 110 (High Pressure Difference)
(orientation as shown in Figure 2, similarly hereinafter) is pushed away to the left, and spool 220 is disengaged with valve port 111, and runner 110 is connected.Lead in resistance wire
Enter electric current, then resistance wire generates heat and makes the melted paraffin wax in the first cavity 211, paraffin volume expansion after fusing, pushes spool 220
It moves right, makes 220 close port 111 of spool, then runner 110 is cut off.It, can be repeatedly above-mentioned if stopping being powered to resistance wire
The process that paraffin cooled and solidified, runner 110 are connected.So, it just realizes and changes runner whether energization by resistance wire
110 break-make.
By adjusting a~f totally 6 regulating valves 200, the break-make to coping with 6 runners 110 is configured, can will be mechanical
Sealing, which is adjusted, arrives a variety of different conditions：
(1) when not being related to slant correction, the break-make that each runner 110 is symmetrically set by way of following table (pays attention to table
The break-make of middle be classified as runner 110 rather than the break-make electricity condition of resistance wire) mechanical seal can be made to be operated in 5 grades of different films
Under thickness.
| a | b | c | d | e | f | Regulating effect |
| It is disconnected | It is disconnected | It is disconnected | It is disconnected | It is disconnected | It is disconnected | Minimum thickness |
| It is logical | It is disconnected | It is disconnected | It is logical | It is disconnected | It is disconnected | Secondary small film thickness |
| It is logical | It is disconnected | It is logical | It is disconnected | It is logical | It is disconnected | Medium film thickness |
| It is disconnected | It is logical | It is logical | It is disconnected | It is logical | It is logical | Secondary big film thickness |
| It is logical | It is logical | It is logical | It is logical | It is logical | It is logical | Maximum film thickness |
For example, by taking dry gas seals as an example, sealing ring 100 and rotating ring are separated using dynamic pressure effect when dry gas seals work normally
101, but start in stopped process, dynamic pressure effect is insufficient, can cause the serious friction between sealing ring 100 and rotating ring 101.For
It solves the problems, such as this, can will start season all runners 110 in sealing and be connected, so that sealing opening force is increased, avoid starting
The contact of sealing ring 100 and rotating ring 101 in journey.It is cut off again corresponding to regulating valve b, d and f after rotating speed reaches normal work rotating speed
Runner 110, avoid film thickness is excessive from leading to larger leakage.The stopped process of sealing is similar.
In another example when dry gas seals needs work under different rotating speeds and/or different medium pressure, film thickness will not phase
With (or even being in contact), adjusting its film thickness at this time, to be allowed to can be operated in leakage under various operating modes low as possible but will not seal
In the state that ring 100 and rotating ring 101 contact.
(2) further, by asymmetrically setting the break-make of each runner 110, can with different degree to sealing ring 100 by
Occur inclination that is abnormal and generating in installation or operational process to compensate.
For example, a place runners 110 are connected and cut off other runners 110, the membrane pressure part where a can be made near runner 110
It increases, sealing ring 100 is made to generate corresponding inclination, inclination caused by offset other certain abnormal factors.B and f institutes are connected
Other runners 110 are cut off in runner 110, then will produce inclination identical with above-mentioned regulative mode, but its amount can bigger.This
Sample can change the various working of mechanical seal or abnormal factors make benefit by reasonably setting the break-make of each runner 110
It repays, mechanical seal is adjusted to the working condition with superior performance.
For another example, it in several bearing springs of sealing ring 100, is sent out with spring performance of the runner 110 where b at same angle
Changing provides thrust increase, causes stationary ring to glance off, be in contact in the position with rotating ring 101.Assuming that machinery is close originally
It is enclosed in the state that the place a, c and e runner 110 is only connected and works, runner 110 where b can be connected at this time, or in conducting b
Runner 110 where cutting off e while place runner 110, to compensate the deflection of stationary ring.
Implement two
Referring to Fig. 4 and Fig. 5, sealing ring 100 (stationary ring) is equipped with 4 runners 110, and each runner 110 is both provided with adjusting
Valve 200 (a~d).By taking the structure of sealing ring 100 at regulating valve 200a as an example, the right of sealing ring 100 in Figure 5 be its with
To 101 mutually matched seal face of rotating ring, top is except seal face outer diameter for sealing higher-pressure region in Fig. 5, in Fig. 5 under
It is sealing low pressure area that side, which is within seal face internal diameter,.
Runner 110 is set on sealing ring 100, and when runner 110 is connected, which becomes sealing higher-pressure region and end face
Internal additional passageway.
In the present embodiment, spool 220 includes valve core 221 and cartridge cover 222, valve core 221 and the one of cartridge cover 222 at
Type；There is valve core 221 interval, cartridge cover 222 to be formed and are used for interval between the part of cartridge cover 222 and valve chamber 210
Filling adjusts the sealing space of working medium 300.It should be noted that spool 220 is only proximate to part and the valve chamber of cartridge cover 222
There is interval, the part of the separate cartridge cover 222 of spool 220 is bonded sliding, the cartridge cover of spool 220 with valve chamber 210 between 210
222 are also bonded sliding with valve chamber 210.
The through-hole for drawing resistance wire can be offered on sealing ring 100, resistance wire is by through-hole from filled with adjusting work
It is drawn in the sealing space of matter 300, fixation is sealed by fluid sealant between resistance wire and through-hole.In addition, on sealing ring 100 also
Offer the screw hole for installation and adjustment screw 240.
The adjustable type mechanically-sealing apparatus of the present embodiment is when mounted：First resistance wire is installed on sealing ring 100, then
Paraffin mass (shape is as shown in Figure 6) and spool 220 are sequentially loaded into valve chamber 210.Screw hole is placed to sealing ring 100 upward, to
Resistance wire energization is allowed to fever and melts paraffin mass.Spool 220 is shifted to the position of close port 111 onto, power-off makes paraffin cool down
Solidification, at the same in valve chamber 210 side far from adjusting screw 240 apply it is cold, to ensure that the paraffin far from adjusting screw 240 first coagulates
Gu.After paraffin, adjusting screw 240 is tightened so that air is threadingly discharged.Further, it is located on sealing ring 100 and adjusts spiral shell
The surrounding of nail 240 is provided with seal groove, and fluid sealant is injected in seal groove, and the space for being so far filled with adjusting working medium 300 is complete
It is hermetically sealed.
The adjustable type mechanically-sealing apparatus of the present embodiment is at work：Electric current is passed through in resistance wire, then resistance wire generates heat
And making melted paraffin wax, paraffin volume expansion after fusing pushes spool 220 to be moved to the left (orientation as shown in Figure 5, similarly hereinafter), makes valve
Core 220 is disengaged with valve port 111, and runner 110 is connected.Stop being powered to resistance wire, then paraffin cooled and solidified, due to being filled with
The space for adjusting working medium 300 is sealing space, and spool 220 moves right under the action of pressure medium, and spool 220 is made to close valve
Mouth 111, the then cut-out of runner 110.So, the break-make for changing runner 110 whether energization by resistance wire is just realized.
By adjusting a~d totally 4 regulating valves 200, the break-make to coping with 4 runners 110 is configured, and can will be sealed
It adjusts under a variety of different conditions：
(1) when not being related to slant correction, the break-make that each runner 110 is symmetrically set by way of following table (pays attention to table
The break-make of middle be classified as runner 110 rather than the break-make electricity condition of resistance wire) mechanical seal can be made to be operated in 3 grades of different films
Under thickness.
| a | b | c | d | Regulating effect |
| It is disconnected | It is disconnected | It is disconnected | It is disconnected | Minimum thickness |
| It is logical | It is disconnected | It is logical | It is disconnected | Medium film thickness |
| It is logical | It is logical | It is logical | It is logical | Maximum film thickness |
It (2) further, can be to sealing ring 100 due to installing or running by asymmetrically setting the break-make of each runner 110
Occur inclination that is abnormal and generating in the process to compensate.For example, a place runners 110 are connected and cut off other runners 110, meeting
Membrane pressure where making a near runner 110 locally increases, and sealing ring 100 is made to generate corresponding inclination.In this way, by reasonably setting
The break-make of fixed each runner 110 can change the various working of mechanical seal or abnormal factors make compensation, by mechanical seal tune
Save the working condition with superior performance.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of adjustable type mechanically-sealing apparatus, which is characterized in that including：Sealing ring, circumferential direction of the sealing ring along sealing ring
Equipped with multiple runners, the seal face of side wall and the sealing ring of each runner through the sealing ring；The sealing
The runner is corresponded on ring and is equipped with regulating valve, and the regulating valve is used to adjust the break-make of the runner；
The regulating valve includes valve chamber and spool, and the spool is slidably disposed in the valve chamber；The runner be equipped with
The valve port of the spool cooperation；Filled with working medium is adjusted in the valve chamber, adjusting working medium volume when heated changes
And the valve core movement is pushed, to open or close the valve port.
2. adjustable type mechanically-sealing apparatus according to claim 1, which is characterized in that the runner include first flow and
Second flow channel, the first flow are radially extended along the sealing ring, and the second flow channel is prolonged along the axial direction of the sealing ring
It stretches；
The valve port is set to the one end of the second flow channel being connect with the first flow, and the second flow channel passes through described
Valve port is connected with the first flow.
3. adjustable type mechanically-sealing apparatus according to claim 1, which is characterized in that the regulating valve further includes heating knot
Structure, the heating structure is contacted with the adjusting working medium in the valve chamber, for heating the adjusting working medium.
4. adjustable type mechanically-sealing apparatus according to claim 3, which is characterized in that the heating structure is resistance wire,
One end of the resistance wire is stretched into the valve chamber and is contacted with the adjusting working medium, and the other end is connect with heating power supply.
5. adjustable type mechanically-sealing apparatus according to claim 1, which is characterized in that the valve chamber include the first cavity and
Second cavity, second cavity is close to the valve port；
The spool is in the form of a column, and the spool is slidedly arranged in second cavity；The adjusting working medium filling is in first chamber
In body.
6. adjustable type mechanically-sealing apparatus according to claim 5, which is characterized in that the cross-sectional area of first cavity
More than the cross-sectional area of second cavity.
7. adjustable type mechanically-sealing apparatus according to claim 5, which is characterized in that the regulating valve further includes end cap,
The end cap is set to the sealing ring, for sealing the one end of first cavity far from second cavity.
8. adjustable type mechanically-sealing apparatus according to claim 1, which is characterized in that the spool includes valve core and valve
Core cap, the valve core and the cartridge cover are integrally formed；
The valve core has interval, the cartridge cover and the interval between the part of the cartridge cover and the valve chamber
It is formed for filling the sealing space for adjusting working medium.
9. adjustable type mechanically-sealing apparatus according to claim 1, which is characterized in that the adjusting working medium is paraffin.
10. according to claim 1-9 any one of them adjustable type mechanically-sealing apparatus, which is characterized in that the multiple runner
Circumferential direction along the sealing ring is uniformly distributed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810164845.2A CN108302204B (en) | 2018-02-27 | 2018-02-27 | Adjustable mechanical sealing device |
| PCT/CN2018/094646 WO2019165740A1 (en) | 2018-02-27 | 2018-07-05 | Adjustable mechanical sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810164845.2A CN108302204B (en) | 2018-02-27 | 2018-02-27 | Adjustable mechanical sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108302204A true CN108302204A (en) | 2018-07-20 |
| CN108302204B CN108302204B (en) | 2024-06-04 |
Family
ID=62848951
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810164845.2A Active CN108302204B (en) | 2018-02-27 | 2018-02-27 | Adjustable mechanical sealing device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108302204B (en) |
| WO (1) | WO2019165740A1 (en) |
Cited By (2)
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| CN110773687A (en) * | 2019-10-24 | 2020-02-11 | 江阴市恒润重工股份有限公司 | Forming method of low-temperature-resistant forging for petrochemical industry |
| CN113494610A (en) * | 2021-07-08 | 2021-10-12 | 西华大学 | Floating ring structure with damping support and mechanical sealing device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108302204B (en) | 2024-06-04 |
| WO2019165740A1 (en) | 2019-09-06 |
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