CN203770201U - Mechanical sealing device capable of bearing high pressure - Google Patents
Mechanical sealing device capable of bearing high pressure Download PDFInfo
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- CN203770201U CN203770201U CN201320863327.2U CN201320863327U CN203770201U CN 203770201 U CN203770201 U CN 203770201U CN 201320863327 U CN201320863327 U CN 201320863327U CN 203770201 U CN203770201 U CN 203770201U
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- ring
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- seat
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- 238000007789 sealing Methods 0.000 title claims abstract description 138
- 210000004907 gland Anatomy 0.000 claims abstract description 50
- 239000007788 liquid Substances 0.000 claims abstract description 46
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 230000000694 effects Effects 0.000 claims abstract description 18
- 230000003068 static effect Effects 0.000 claims description 73
- 239000012530 fluid Substances 0.000 claims description 67
- 230000015572 biosynthetic process Effects 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 6
- 230000000670 limiting effect Effects 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000005461 lubrication Methods 0.000 abstract description 2
- 239000012528 membrane Substances 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 11
- 230000006837 decompression Effects 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 8
- 229910002804 graphite Inorganic materials 0.000 description 6
- 239000010439 graphite Substances 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000007701 flash-distillation Methods 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 230000036961 partial effect Effects 0.000 description 3
- 210000000515 tooth Anatomy 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000003276 anti-hypertensive effect Effects 0.000 description 1
- 238000004517 catalytic hydrocracking Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Abstract
The utility model discloses a mechanical sealing device capable of bearing high pressure. The mechanical sealing device is characterized by comprising an inner gland bush, an outer gland bush, a shaft sleeve, a first stationary ring component, a rotating ring component and a second stationary ring component, wherein a pump shaft is sleeved with the shaft sleeve, the inner gland bush and the outer gland bush are arranged outside the shaft sleeve in a sleeving manner, and a ring-shaped cavity is formed among the inner gland bush, the outer gland bush and the outer wall surface of the shaft sleeve; the first stationary ring component, the rotating ring component and the second stationary ring component are sequentially arranged inside the ring-shaped cavity from the inner side to the outer side, the rotating ring component is fixed on the shaft sleeve, and the first stationary ring component and the second stationary ring component are respectively and tightly adhered to the inner end surface and the outer end surface of the rotating ring component; the inner side of the first stationary ring component is fixed on the inner gland bush, and the outer side of the second stationary ring component is fixed on the outer gland bush. The mechanical sealing device provided by the utility model can bear a pressure higher than 12MPa, the problem of overlarge pressure difference in high pressure sealing can be solved, the specific pressure of a sealing end surface is optimized, the load of the end surface is lowered, the deformation-resistant capability of the end surface is enhanced, the cooling cycle effect of a sealing liquid is good, the rigidity of a liquid membrane at the sealing end surface is excellent, the lubrication state is good, the service life of a sealing piece is good, the maintenance is convenient, and the cost is low.
Description
Technical field
The utility model relates to mechanical seal device, refers in particular to a kind of mechanical seal device that bears high pressure of unit loading type Double End.
Background technique
In oil refining industry, because the requirement of production technology has a lot of high pressure centrifugal pumps, pumping high-pressure fluid medium.As the high-pressure service pump in hydrocracking unit, synthetic ammonia installation, pump discharge pressure is generally higher, (but inlet pressure is generally no more than 10Mpa, and its mechanical seal used is relatively easy); The a bit special special process requirement of some industry, such as the high pressure of marine petroleum exploitation water is produced water pump, (its preposition exit of pump pressure is 10 Mpa,) inlet pressure 10 Mpa, outlet pressure is 12 Mpa, according to production practices, the mechanical seal device using in this kind equipment must directly bear the pressure of 12 Mpa.In row, general way is to adopt plural serial stage mechanical seal to carry out progressively step-down at present, but its sealing axial dimension is very long.Particularly, for high pressure sealing, there is following problem: excessive, the irrational face pressure of pressure reduction, high PV value, friction pair are selected firmly to hard, sealing surface distortion, sealing cool cycles weak effect etc.The problems referred to above all can cause seal face liquid film to occur the phenomenons such as flash distillation, unstability, excessive wear, and the working life of Sealing is short.
Model utility content
The technical problems to be solved in the utility model is for above-mentioned the deficiencies in the prior art, provides a kind of radial dimension compact, and antihypertensive effect is good, and sealing surface working environment improves, the mechanical seal device of the born high pressure of strong adaptability and long service life.
The technological scheme that the utility model is taked is as follows, a kind of mechanical seal device that bears high pressure, it is characterized in that: comprise internal gland, outer press cover, axle sleeve, the first static components, moving ring assembly and the second static components, wherein: described axle sleeve is set on pump shaft, internal gland and outer press cover are set in the outside of axle sleeve, and form annular housing between the outer wall of axle sleeve; Described the first static components, moving ring assembly and the second static components are successively set in above-mentioned annular housing laterally by inner side, and moving ring assembly is fixed on axle sleeve, and its interior edge face and exterior edge face are adjacent to respectively the first static components and the second static components; The inner side of above-mentioned the first static components is fixed on internal gland, and the outside of the second static components is fixed on outer press cover.
Preferably, described the first static components comprises the first stationary ring and the first stationary seat, wherein: the inner of above-mentioned the first stationary seat is fixed on internal gland by the first stop pin and the first spring, the first stop pin prevents that the first stationary seat from rotating, the first spring, to the first stationary seat axial limiting, provides stretch compensation; Above-mentioned the first stationary ring is embedded in the outer end of the first stationary seat.
Preferably, the middle part of the exterior edge face of described the first stationary ring is provided with an annular flange, and this flange surface and moving ring assembly are adjacent to, and forms sealing surface, on the inner ring face of flange surface, have at least two first fluid dynamic pressure grooves, first fluid dynamic pressure groove arranges along the circumferencial direction interval of inner ring face.
Preferably, described the second static components comprises the second stationary ring, fastening ring and the second stationary seat, wherein: the outer end of above-mentioned the second stationary seat is fixed on outer press cover by the second stop pin and the second spring, the second stop pin prevents that the second stationary seat from rotating, the second spring, to the second stationary seat axial limiting, provides stretch compensation; Above-mentioned the second stationary ring is embedded in the inner of the second stationary seat, and stationary ring inner radius has fastening ring, and the middle part of the second stationary ring interior edge face is provided with an annular flange, and this flange surface and moving ring assembly are adjacent to, and forms sealing surface; Above-mentioned fastening ring is step ring bodies, and fastening ring embeds the inner ring of the second stationary ring, and pushing tow the second stationary ring, prevents the distortion that the sealing surface on the second stationary ring produces because of high pressure from inside to outside.
Preferably, described moving ring assembly comprises the first rotating ring, rotating seat and the second rotating ring, and wherein: the inner of above-mentioned rotating seat is provided with pressed seat, the exterior edge face of pressed seat is ladder surface, and on it, ladder surface is adjacent to the interior edge face of rotating seat, so that axial compression rotating seat; Above-mentioned the first rotating ring and the second rotating ring are fixed on respectively the inner and the outer end of rotating seat by driving pin, the flange surface laminating of the interior edge face of the first rotating ring and the first stationary ring, form sealing surface, the flange surface laminating of the exterior edge face of the second rotating ring and the second stationary ring, form sealing surface, on the exterior edge face of the second rotating ring, have second fluid dynamic pressure groove.
Preferably, on the outer diametric plane of described rotating seat, offer at least two spiral chutes, rotating seat outer cover has baffling cover, the aperture surface of baffling cover and the outer diametric plane of rotating seat are little Spielpassung, pump shaft drives rotating seat High Rotation Speed, make to produce pumping effect between above-mentioned swivelling chute and baffling cover, sealing fluid is delivered to outside cooling tank cooling.
Preferably, the inner of described internal gland is provided with pressure reducing sleeve, and the inner of pressure reducing sleeve is fixed on internal gland, the other end is cylindrical shell, extend out in the first static components, cylindrical shell is two-part by the spatial separation between the first static components and internal gland and pump shaft, forms the flow circuits of medium.
Preferably, the inner of described pressure reducing sleeve is provided with labyrinth part, and the exterior edge face of the interior edge face of pressure reducing sleeve and labyrinth part is equipped with the axial labyrinth teeth at least two roads, the mazy flow channel for liquids of both mutual chimeric formation; The inner ring the inside of pressure reducing sleeve is stretched in the outer end of above-mentioned labyrinth part, labyrinth part stretches on the outer diametric plane of pressure reducing sleeve inner round portion and has at least two road throttling grooves, during pump shaft High Rotation Speed, medium flows into throttling groove through mazy flow channel for liquids, through throttling groove, along the aperture surface of pressure reducing sleeve and the gap between pump shaft, flow to the sealing surface inner radius that the first static components and moving ring assembly form, after cooling sealing face, flow to the first static components and internal gland with the gap between the outer diametric plane of pressure reducing sleeve, by the inclined hole being opened on internal gland, export to one-level decompressing connection.
Preferably, on described outer press cover, have sealing liquid import and sealing liquid outlet, sealing fluid flow to the sealing surface outer radius of the first static components and moving ring assembly formation through sealing liquid import, after cooling sealing face, by the pumping effect between the spiral chute on rotating seat and baffling cover, sealing fluid is directed to the sealing surface outer radius of the second static components and moving ring assembly formation, after cooling sealing face, through sealing liquid outlet, derive.
Preferably, the outer end of described axle sleeve is fastened on pump shaft by drive unit; Above-mentioned drive unit comprises inner sleeve, left ring and right ring, high in the middle of the outer diametric plane of inner sleeve, two ends are low, form two inclined-planes, left ring and right ring are set in respectively on two inclined-planes, and when left ring and right ring are compressed by screw, left ring and right ring are all close to centre, both inner ring produce pressure-acting with in put, inner sleeve and then compress axle sleeve.
The beneficial effects of the utility model are:
The utility model can bear the pressure that is greater than 12MPa, solved the excessive problem of pressure reduction in high pressure sealing, optimized seal face specific pressure, reduced face loading, the ability that has strengthened seal face resistance to deformation, sealing fluid cool cycles is effective, seal face liquid film rigidity is good and lubricating status good, the long service life of Sealing, easy to maintenance, cost is low.Particularly: 1, the utility model adopts double sealing structure, two rotating rings are combined formation its both sides of moving ring assembly and are respectively equipped with stationary ring, dynamic and static ring surface of contact forms sealing surface, the inner of inner seal face is medium, and the outer end of outside sealing surface is atmosphere, and two sealing surfaces are filled with sealing fluid, sealing fluid circulates, with cooling and flushing sealing surface, specifically in sealing fluid, pass through external pressurized equipment, form a pressure to offset the pressure of medium to sealing surface; 2, the inner of internal gland is provided with pressure reducing sleeve 13 and labyrinth part 14, between both side end faces, form loop, labyrinth, on the outer diametric plane of labyrinth part 14, offer throttling groove, throttling groove forms first order step-down together with loop, labyrinth, medium, when said structure enters inner seal face, reduces partial pressure; 3, on the exterior edge face of the first stationary ring, have first fluid dynamic pressure groove, make the sealing fluid can abundant cooling inner seal face; 4, rotating seat external diameter has spiral chute, and spiral chute coordinates and produces pumping effect, automatic transport sealing fluid with baffling cover; 5, the inner ring of the second stationary ring is provided with fastening ring, to provide support power to the second stationary ring, offsets the partial pressure in sealing fluid, reduces outside seal face and is out of shape because the pressure reduction bearing produces seal face; 6, the second rotating ring exterior edge face is provided with second fluid dynamic pressure groove, when moving ring assembly 2 rotates with pump shaft, second fluid dynamic pressure groove produces a centrifugal action power to offset the pressure in part sealing fluid, sealing fluid is clamp-oned second fluid dynamic pressure groove simultaneously, can infiltrate in seal face, cooling effect is better, and the centrifugal force producing during rotation easily throws away foreign material in groove.
Accompanying drawing explanation
Fig. 1 is sectional view of the present utility model.
Fig. 2 is assembly structure schematic diagram of the present utility model.
Fig. 3 is the perspective view of Fig. 2.
Fig. 4 is the structural representation of the first static components in Fig. 2.
Fig. 5 is the side view of Fig. 4.
Fig. 6 is the assembly structure schematic diagram of Fig. 4.
Fig. 7 is the structural representation of moving ring assembly in Fig. 2.
The structural representation of the second rotating ring in Fig. 8 Fig. 7.
Fig. 9 is the side view of Fig. 8.
Figure 10 is the assembly structure schematic diagram of Fig. 7.
Figure 11 is the assembly structure schematic diagram of the second static components in Fig. 2.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described:
As shown in Figure 1 to 11, the technological scheme that the utility model is taked is as follows, a kind of mechanical seal device that bears high pressure, it is characterized in that: comprise internal gland 7, outer press cover 5, axle sleeve 4, the first static components 1, moving ring assembly 2 and the second static components 3, wherein: described axle sleeve 4 is set on pump shaft 01, internal gland 7 and outer press cover 5 are set in the outside of axle sleeve 4, and form annular housing between the outer wall of axle sleeve 4; Described the first static components 1, moving ring assembly 2 and the second static components 3 are successively set in above-mentioned annular housing laterally by inner side, and moving ring assembly 2 is fixed on axle sleeve 4, and its interior edge face and exterior edge face are adjacent to respectively the first static components 1 and the second static components 3; The inner side of above-mentioned the first static components 1 is fixed on internal gland 7, and the outside of the second static components 3 is fixed on outer press cover 5.
Preferably, described the first static components 1 comprises the first stationary ring A1 and the first stationary seat B1, wherein: the inner of above-mentioned the first stationary seat B1 is fixed on internal gland 7 by the first stop pin C1 and the first spring 1A, the first stop pin C1 prevents that the first stationary seat B1 from rotating, the first spring 1A, to the first stationary seat B1 axial limiting, provides stretch compensation; Above-mentioned the first stationary ring A1 is embedded in the outer end of the first stationary seat B1.
Preferably, the middle part of the exterior edge face of described the first stationary ring A1 is provided with an annular flange, and this flange surface and moving ring assembly 2 are adjacent to, and forms sealing surface, on the inner ring face of flange surface, have at least two first fluid dynamic pressure groove 1D, first fluid dynamic pressure groove 1D arranges along the circumferencial direction interval of inner ring face.
Preferably, described the second static components 3 comprises the second stationary ring B3, fastening ring C3 and the second stationary seat A3, wherein: the outer end of above-mentioned the second stationary seat A3 is fixed on outer press cover 5 by the second stop pin D1 and the second spring 3A, the second stop pin D1 prevents that the second stationary seat A3 from rotating, the second spring 3A, to the second stationary seat A3 axial limiting, provides stretch compensation; Above-mentioned the second stationary ring B3 inner radius has fastening ring C3, and stationary ring is embedded in the inner of the second stationary seat A3, and the middle part of the second stationary ring B3 interior edge face is provided with an annular flange, and this flange surface and moving ring assembly 2 are adjacent to, and forms sealing surface; Above-mentioned fastening ring C3 is step ring bodies, and fastening ring C3 embeds the inner ring of the second stationary ring B3, and pushing tow the second stationary ring B3, prevents the distortion that the sealing surface on the second stationary ring B3 produces because of high pressure from inside to outside.
Preferably, described moving ring assembly 2 comprises the first rotating ring 2A, rotating seat 2F and the second rotating ring 2D, and wherein: the inner of above-mentioned rotating seat 2F is provided with pressed seat 11, the exterior edge face of pressed seat 11 is ladder surface, on it, ladder surface is adjacent to the interior edge face of rotating seat 2F, so that axial compression rotating seat 2F; Above-mentioned the first rotating ring 2A and the second rotating ring 2D are fixed on respectively the inner and the outer end of rotating seat 2F by driving pin 2G, the flange surface laminating of the interior edge face of the first rotating ring 2A and the first stationary ring A1, form sealing surface, the flange surface laminating of the exterior edge face of the second rotating ring 2D and the second stationary ring B3, form sealing surface, on the exterior edge face of the second rotating ring 2D, have second fluid dynamic pressure groove 2H.
Preferably, on the outer diametric plane of described rotating seat 2F, offer at least two spiral chutes, rotating seat 2F outer cover has baffling cover 6, the aperture surface of baffling cover 6 and the outer diametric plane of rotating seat 2F are little Spielpassung, pump shaft 01 drives rotating seat 2F High Rotation Speed, make to produce pumping effect between above-mentioned swivelling chute and baffling cover 6, sealing fluid is delivered to outside cooling tank cooling.
Preferably, the inner of described internal gland 7 is provided with pressure reducing sleeve 13, the inner of pressure reducing sleeve 13 is fixed on internal gland 7, the other end is cylindrical shell, extend out in the first static components 1, cylindrical shell is two-part by the spatial separation between the first static components 1 and internal gland 7 and pump shaft 01, forms the flow circuits of medium.
Preferably, the inner of described pressure reducing sleeve 13 is provided with labyrinth part 14, and the exterior edge face of the interior edge face of pressure reducing sleeve 13 and labyrinth part 14 is equipped with the axial labyrinth teeth at least two roads, the mazy flow channel for liquids of both mutual chimeric formation, the inner ring the inside of pressure reducing sleeve 13 is stretched in the outer end of above-mentioned labyrinth part 14, labyrinth part 14 stretches on the outer diametric plane of pressure reducing sleeve 13 inner round portion and has at least two road throttling grooves, during pump shaft 01 High Rotation Speed, medium flows into throttling groove through mazy flow channel for liquids, through throttling groove, along the aperture surface of pressure reducing sleeve 13 and the gap between pump shaft 01, flow to the sealing surface inner radius that the first static components 1 and moving ring assembly 2 form, after cooling sealing face, flow to the first static components 1 and internal gland 7 with the gap between the outer diametric plane of pressure reducing sleeve 13, by the inclined hole 05 being opened on internal gland 7, export to one-level decompressing connection 06.
Preferably, on described outer press cover 5, have sealing liquid import 03 and sealing liquid outlet 04, sealing fluid flow to the sealing surface outer radius of the first static components 1 and moving ring assembly 2 formation through sealing liquid import 03, after cooling sealing face, by the pumping effect between the spiral chute on rotating seat 2F and baffling cover 6, sealing fluid is directed to the sealing surface outer radius of the second static components 3 and moving ring assembly 2 formation, after cooling sealing face, through sealing liquid outlet 04, derive.
Preferably, the outer end of described axle sleeve 4 is fastened on pump shaft 01 by drive unit 8; Above-mentioned drive unit 8 comprises inner sleeve, left ring and right ring, high in the middle of the outer diametric plane of inner sleeve, two ends are low, form two inclined-planes, left ring and right ring are set in respectively on two inclined-planes, and when left ring and right ring are compressed by screw, left ring and right ring are all close to centre, both inner ring produce pressure-acting with in put, inner sleeve and then compress axle sleeve 4.
An optimal way, described labyrinth part 14 coordinates with pressure reducing sleeve 13 at side medium, and pressure reducing sleeve 13 has a sponson, extend near sealing surface external diameter Shang Youji road throttling groove.Its beneficial effect is: during pump shaft High Rotation Speed, labyrinth part 14 works with pressure reducing sleeve 13 1, and forming labyrinth seal is mazy flow channel for liquids, when medium flows into this flow channel for liquids, just realizes first order decompression, can effectively side medium pressure be reduced to 1-2Mpa.Post-decompression fluid, through seal face inner radius, is taken away frictional heat, then the cavity between pressure reducing sleeve 13 external diameters and internal gland minimum diameter, by the inclined hole 05 that is positioned at internal gland 7 deliver to one-level decompressing connection be the external pipeline of the pump housing and, this interface is connected with pump intake.Preferably, one-level decompressing connection is furnished with orifice plate and modulating valve, for regulating one-level decompression pressure versus flow, little on pump efficiency impact, is equivalent to the backwash effect to sealing, can effectively improve seal lubrication.
A kind of optimal way, the utility model sealing system is outside seal liquid pump circulation or self-circulation system with pressure, by source nitrogen to sealing fluid liquid container pressurization 6MPa, above-mentioned pressure is generally half of pressure medium, sealing fluid provides an internal pressure in coolant seal face, so that the effect of the pressure in balance media to sealing system, sealing fluid is selected can be perhaps similar to the insensitive liquid of medium pollution mutually to medium.Its beneficial effect is: 1, can reduce step by step the pressure reduction that seal arrangement bears; 2, system maintenance easy.
A kind of optimal way, described the first static components 1 is assemblied on internal gland 7 heavy stands, the first spring 1A state type is installed, so that stretch compensation to be provided, the first static components 1 is provided with the first seal ring 1B with the joint of internal gland 7, and the inner side of the first seal ring 1B is lined with the first liner 1C, and the first static components 1 relatively internal gland 7 endwisely slips, be slipper seal between the two, the first liner 1C can prevent that the first seal ring 1B from being affected the floatability of Sealing to extruding by medium high-pressure shaft.
A kind of optimal way, the first static components 1 is designed to Bidirectional balance structure with the sealing surface that moving ring assembly 2 forms, the pressure reducing sleeve 13 that its inner side is provided with and labyrinth part 14 form one-level decompression, its outside is sealing fluid, in sealing fluid, also have a pressure, this pressure reversal effect and sealing surface reach decompression counterbalance effect.Its beneficial effect is: 1, seal face bearing capacity is high; 2, when pressure medium is unstable or during lower than sealed fluid pressure, pressure reducing sleeve 13 and labyrinth part 14 form one-level decompression and can oppositely reduce the pressure of sealing fluid and reduce pressure, form a kind of autobalance type pressure regulative mode, be not the stressed impact of direction of the use of Sealing.
A kind of optimal way, described the second static components 3 is the anti-high pressure design of in-built balance type, the second stationary ring B3 internal diameter is inlaid with step annular fastening ring C3, this fastening ring C3 is heavy wall near a side of sealing surface, can effectively support sealing surface, its anti-pressure ability is strengthened, the second stationary seat A3 and outer press cover 5 joints are provided with the second seal ring 3B, the outside of the second seal ring 3B is lined with the second liner 3C, the second static components 3 relatively outer press cover 5 endwisely slips, be slipper seal between the two, the second liner 3C can prevent that the second seal ring 3B is extruded and affects sealing when the second static components 3 is slided.Its beneficial effect is: 1, the second spring 3A is not subject to the impact of centrifugal force, and elastic compensating the second static components 3, makes sealing surface more stable; 2, the second stationary ring C3 internal diameter is inlaid with step annular fastening ring B3, the distortion producing because of high pressure to resist seal face; Described the second stationary ring C3 is high strength carbon graphite, and the linear expansion coeffcient of the second stationary seat A3 and fastening ring B3 approaches carbon graphite linear expansion coeffcient.
An optimal way, described moving ring assembly 2 seal arrangements are between two groups of static components, and the rotating seat 2F two ends in moving ring assembly 2 are concordant with rotating ring end face, and rotating seat 2F external diameter has multi-head spiral groove; The external diameter of driving pin 2G is furnished with cushion collar, between the outer diametric plane of the first rotating ring 2A and aperture surface and rotating seat 2F, be respectively equipped with the 3rd seal ring 2C and the 4th seal ring 2B, between the second rotating ring 2D and rotating seat 2F, be provided with the 5th seal ring 2E, between rotating seat 2F and axle sleeve 4 external diameters, be provided with the 6th seal ring 4A.Its beneficial effect is: can whole moving ring assembly 2 seal arrangements of simultaneous grinding while 1, producing Sealing; 2, again by rotating seat 2F left side and axle sleeve 4 step end face facing-ups, can guarantee the perpendicularity of rotating ring seal face and pump shaft 01; 3, by rotating seat 2F, bear mechanical interlocking power (rotating ring end face is without distortion).While 4, opening pump termination of pumping, rotating ring can the impact of anti-metalwork to rotating ring.
An optimal way, the end face of described the first stationary ring A1 is high strength carbon graphite, the radial thickness of the first stationary seat B1 is large; On the interior edge face of the first stationary ring A1, be processed with first fluid dynamic pressure type groove 1D, flute profile is interior parabola.Its beneficial effect is: the sealing surface that 1, the first stationary ring A1 and the first rotating ring 2A form adopts silicon carbide to graphite, is best pairing combination, 2, sealing compressive strength is high, further, although high-pressure medium is after first order decompression, also may have quite high pressure, the seal face load ratio that the first stationary ring A1 and the first rotating ring 2A are formed is larger, when being situated between the first rotating ring 2A High Rotation Speed, liquid medium is got into seal face, generation has the pure liquid film of certain rigidity, be accompanied with subsequently the banding pattern cooled region of a comet tail, to seal face liquid zone, force cooling, collect in the end face liquid Bei Houyicao district of residual heating, be thrown in the medium of sealing surface inner radius and take away, reduced the temperature of seal face, effectively suppressed the flash distillation of sealing surface liquid film, that is sealing surface lubricating status is good.
An optimal way, described the second rotating ring 2D end face is carved with second fluid dynamic pressure groove 2H, and flute profile sideline is oval-shaped long limit arcuate line segment, is positioned on the end face outside of the second rotating ring 2D.Its beneficial effect is: 1, second fluid dynamic pressure groove 2H is positioned on the end face outside of the second rotating ring 2D, can removal of contamination, when moving ring assembly 2 rotates with pump shaft, produce a centrifugal action power to offset the pressure in part sealing fluid, sealing fluid flows into second fluid dynamic pressure groove simultaneously, can clamp-on in seal face, cooling effect is better, and the centrifugal force producing during rotation easily throws away foreign material in groove.2, when moving ring assembly 2 in the running, the second rotating ring 2D and the second stationary ring B3 external diameter directly bear 6 MPa pressure in sealing fluid, inner radius is born barometric pressure, therefore that seal face bears pressure reduction is larger.During pump shaft 01 High Rotation Speed, sealing fluid, except getting into seal face because of pressure reduction, is also produced between the face of the squeezed inlet side of fluid wedge dynamic pressure effect by type groove, thereby lubricated and cooling to seal face.
From Fig. 1 to Fig. 3 and Fig. 6, Figure 10, Figure 11, between internal gland 7 and outer press cover 5, by screw 7C, be connected and fixed, be provided with the 7th seal ring 7A between the two with sealing, the outside of internal gland 7 connects pump seal cavity 07, and both joints seal by the 8th seal ring 7B and the 9th seal ring 7D; Pressure reducing sleeve 13 is fixed on by attachment screw 16 on the interior edge face of internal gland 7, and labyrinth part 14 is fixed on pump shaft 01 by set screw 15; Between outer press cover 5 and axle sleeve 4, be provided with restrictor ring 5A.Further, the first static components 1 is assemblied on the inner heavy stand of internal gland 7, the first stationary seat B1 has some counterbores to place the first spring 1A, the first spring 1A withstands on internal gland 7 interior edge faces, stretch compensation is provided, between the endoporus of first static components 1 the inner and internal gland 7 internal diameter the first boss external diameters, be provided with the first seal ring 1B and form slipper seal, isolating seal liquid and high-pressure medium.The first seal ring 1B is lined with the first liner 1C, prevents that the first seal ring 1B is extruded; The second static components 3 is contained in outer press cover 5 endoporus, its inner external diameter and outer press cover 5 endoporus are provided with seal ring 3B and form motive sealing, isolating seal liquid and atmospheric side, some the second spring 3A are distributed in the outer press cover 5 circumferential counterbores in sealing liquid side end face, second spring 3A ejection the second static components 3 left sides, large footpath, the second liner 3C is placed in the second seal ring 3B atmospheric side.The second static components 3 is by the second stop pin D1 anti-rotation that is assemblied in outer press cover 5; Preferably, the second static components 3 provides the stretch compensation of sealing, and the second spring is not subject to the impact of centrifugal force; The second static components 3 is the anti-high pressure design of in-built balance type, and the second stationary ring B3 internal diameter is inlaid with step annular fastening ring C3, the distortion producing because of high pressure with anti-seal face; Described the second stationary ring B3 is high strength carbon graphite, and the linear expansion coeffcient of the second stationary seat A3 and fastening ring C3 approaches the second stationary ring B3.Moving ring assembly 2 seal arrangements are between two groups of static components, the first rotating ring 2A and the second rotating ring 2D turn and are assigned in the counterbore of rotating seat 2F both sides, the 5th seal ring 2E forms static seal, separating atmospheric side and sealing fluid between rotating seat 2F looping pit second and rotating ring 2D external diameter.The 3rd seal ring 2C is loaded in rotating seat 2F outer ring hole and forms static seal with the first rotating ring 2A external diameter, and the 4th seal ring 2B is assemblied in the interior looping pit of rotating seat 2F, forms static seal with the first rotating ring 2A internal diameter.On rotating seat 2F, having compared with the driving pin 2G overcoat of loose fit has cushion collar to provide moment of torsion for moving ring assembly 2.Whole moving ring assembly 2 seal arrangements are enclosed within axle sleeve 4 end cylindricals, and left inside end face withstands on axle sleeve 4 step places, and rotating seat 2F is stepped up by some housing screws 12 by pressed seat 11.On rotating seat 2F external diameter, had multi-head spiral groove; Outer press cover 5 atmospheric side the second inner radius are inlaid with restrictor ring 5A, sealing fluid side the second internal diameter is inlaid with baffling cover 6, sealing fluid enters by sealing liquid entrance 03 seal chamber that aforementioned sealing component form, when pump shaft 01 runs up, sealing fluid overlaps the little Spielpassung of 6 internal diameter place through spiral chute and baffling, form pumping effect, sealing fluid is delivered to outside sealing liquid tank cooling.Internal gland 7 media ends are furnished with pressure reducing sleeve 13, and the pressure reducing sleeve 13 axial labyrinth teeths in side medium end face You Ji road coordinate formation labyrinth seal with the labyrinth part 14 being fixed on pump shaft 01.Preferably, the outer end of pressure reducing sleeve 13 extends near seal face.Preferably, labyrinth part 14 stretches into the external diameter Shang Youji road throttling groove of pressure reducing sleeve 13 inner radius, during pump shaft High Rotation Speed and above-mentioned labyrinth seal one work, realize first order decompression, can effectively side medium pressure be reduced to 1-2Mpa.Post-decompression fluid, through seal face inner radius, is taken away frictional heat, then the space between pressure reducing sleeve 13 external diameters and internal gland 5 minimum diameters, by an inclined hole 05 that is positioned at internal gland 5, delivers to the external pipeline of the pump housing.Preferably, exterior tubing is furnished with orifice plate modulating valve, for regulating one-level decompression pressure and outer vent flow, little on pump efficiency impact, be equivalent to the backwash effect to sealing, coolant seal reduces end face temperature, stable liquid film prevents dry friction, improves and seals working life.
From Fig. 4 to Fig. 6, the first static components 1 is inlayed and is connected with the first stationary seat A2 by the first stationary ring A1, and described the first stationary ring A1 is high strength carbon graphite.Preferably, the first stationary seat radial thickness is larger, is enough to resist high pressure; The first stationary ring end face inner radius is processed with first fluid dynamic pressure groove 1D, and flute profile is interior parabola, can storage compartment circulating liquid in groove, thus can effective cooling seal face; Preferably, the first static components is the design of pressure Bidirectional balance, and while selecting recycle seal system, preferably, system sealing tank 6MPa with pressure, can alleviate side medium primary seal pressure reduction; Although after first order decompression, also there is partial pressure in medium, the load of seal face may also exist, when moving ring assembly 2 High Rotation Speed, liquid medium is got into seal face, generation has the pure liquid film of certain rigidity, be accompanied with subsequently the banding pattern cooled region of a comet tail, to seal face liquid zone, force cooling, collect in the end face liquid Bei Houyicao district of residual heating, is thrown in the medium of sealing surface inner radius and takes away, and has reduced the temperature of seal face, effectively suppressed the flash distillation of sealing surface liquid film, that is sealing surface lubricating status is good.
End face by known the second rotating ring 2D of Fig. 8 to Figure 10 is carved with second fluid dynamic pressure groove 2H, and in figure, double dot dash line circle is the sealing surface external diameter of the second stationary ring B3.Preferably, the flute profile sideline of second fluid dynamic pressure groove 2H is oval-shaped long limit arcuate line segment.In Sealing when running,, the external diameter of the second rotating ring 2D and the second stationary ring B3 is directly in the face of the elevated pressures of sealing system 6 MPa, and the inner radius of the second stationary ring B3 is barometric pressure, therefore that seal face bears pressure reduction is larger, has certain seal load, although be the good medium of thermal diffusivity at the second rotating ring 2D outer radius sealing fluid, but larger seal load easily makes to seal liquid film unstability, for addressing the above problem, in the inner ring of the second stationary ring B3, be provided with fastening ring C3 to support the second stationary ring B3, bear pressure reduction, the second rotating ring 2D is when with pump shaft 01 rotation simultaneously, second fluid dynamic pressure groove 2H on it can oppositely throw away the liquid being stored in wherein, form the centrifugal force with seal fluid pressure in contrast, thereby offset the pressure of part seal fluid to seal face, and the second rotating ring 2D is stretched in the inner of second fluid dynamic pressure groove 2H and the second stationary ring B3 surface of contact is in sealing surface, the sealing fluid circulating enters second fluid dynamic pressure groove 2H makes the cooling effect of sealing surface better.In addition, it is upper that second fluid dynamic pressure groove 2H is positioned at rotating ring end face outside, under centrifugal action, easily foreign material in groove thrown away.Preferably, fluid dynamic pressure groove sideline is oval, and its oval heart is positioned at the outer 1.2mm of rotating ring external diameter.
Preferably, the first rotating ring 2A and the second rotating ring 2D material are silicon carbide.
Embodiment of the present utility model just introduces its embodiment, does not lie in and limits its protection domain.The technician of the industry can make some and revise under the inspiration of the present embodiment, and the equivalence of doing according to the utility model the scope of the claims therefore all changes or modifies, and all belongs within the scope of the utility model Patent right requirement.
Claims (10)
1. the mechanical seal device that can bear high pressure, it is characterized in that: comprise internal gland (7), outer press cover (5), axle sleeve (4), the first static components (1), moving ring assembly (2) and the second static components (3), wherein: described axle sleeve (4) is set on pump shaft (01), internal gland (7) and outer press cover (5) are set in the outside of axle sleeve (4), and form annular housing between the outer wall of axle sleeve (4); Described the first static components (1), moving ring assembly (2) and the second static components (3) are successively set in above-mentioned annular housing laterally by inner side, it is upper that moving ring assembly (2) is fixed on axle sleeve (4), and its interior edge face and exterior edge face are adjacent to respectively the first static components (1) and the second static components (3); It is upper that the inner side of above-mentioned the first static components (1) is fixed on internal gland (7), and the outside of the second static components (3) is fixed on outer press cover (5).
2. a kind of mechanical seal device that bears high pressure according to claim 1, it is characterized in that: described the first static components (1) comprises the first stationary ring (A1) and the first stationary seat (B1), wherein: the inner of above-mentioned the first stationary seat (B1) is fixed on internal gland (7) by the first stop pin (C1) and the first spring (1A), the first stop pin (C1) prevents that the first stationary seat (B1) from rotating, the first spring (1A), to the first stationary seat (B1) axial limiting, provides stretch compensation; Above-mentioned the first stationary ring (A1) is embedded in the outer end of the first stationary seat (B1).
3. a kind of mechanical seal device that bears high pressure according to claim 2, it is characterized in that: the middle part of the exterior edge face of described the first stationary ring (A1) is provided with an annular flange, this flange surface and moving ring assembly (2) are adjacent to, form sealing surface, on the inner ring face of flange surface, have at least two first fluid dynamic pressure grooves (1D), first fluid dynamic pressure groove (1D) arranges along the circumferencial direction interval of inner ring face.
4. according to a kind of mechanical seal device that bears high pressure described in any one in claim 1-3 item, it is characterized in that: described the second static components (3) comprises the second stationary ring (B3), fastening ring (C3) and the second stationary seat (A3), wherein: the outer end of above-mentioned the second stationary seat (A3) is fixed on outer press cover (5) by the second stop pin (D1) and the second spring (3A), the second stop pin (D1) prevents that the second stationary seat (A3) from rotating, the second spring (3A), to the second stationary seat (A3) axial limiting, provides stretch compensation; Above-mentioned the second stationary ring (B3) is embedded in the inner of the second stationary seat (A3) by fastening ring (C3), the middle part of the second stationary ring (B3) interior edge face is provided with an annular flange, and this flange surface and moving ring assembly (2) are adjacent to, and forms sealing surface; Above-mentioned fastening ring (C3) is step ring bodies, and fastening ring (C3) embeds the inner ring of the second stationary ring (B3), and pushing tow the second stationary ring (B3), prevents the distortion that the sealing surface on the second stationary ring (B3) produces because of high pressure from inside to outside.
5. a kind of mechanical seal device that bears high pressure according to claim 4, it is characterized in that: described moving ring assembly (2) comprises the first rotating ring (2A), rotating seat (2F) and the second rotating ring (2D), wherein: the inner of above-mentioned rotating seat (2F) is provided with pressed seat (11), the exterior edge face of pressed seat (11) is ladder surface, its going up or down stairway face is adjacent to respectively the interior edge face of rotating seat (2F) and the interior edge face of axle sleeve (4), so that axial compression rotating seat (2F); Above-mentioned the first rotating ring (2A) and the second rotating ring (2D) are fixed on respectively the inner and the outer end of rotating seat (2F) by driving pin (2G), the flange surface laminating of the interior edge face of the first rotating ring (2A) and the first stationary ring (A1), form sealing surface, the flange surface laminating of the exterior edge face of the second rotating ring (2D) and the second stationary ring (B3), form sealing surface, on the exterior edge face of the second rotating ring (2D), have second fluid dynamic pressure groove (2H).
6. a kind of mechanical seal device that bears high pressure according to claim 5, it is characterized in that: on the outer diametric plane of described rotating seat (2F), offer at least two spiral chutes, rotating seat (2F) outer cover has baffling cover (6), the outer diametric plane of the aperture surface of baffling cover (6) and rotating seat (2F) is little Spielpassung, pump shaft (01) drives rotating seat (2F) High Rotation Speed, make to produce pumping effect between above-mentioned swivelling chute and baffling cover (6), sealing fluid is delivered to outside cooling tank cooling.
7. a kind of mechanical seal device that bears high pressure according to claim 6, it is characterized in that: the inner of described internal gland (7) is provided with pressure reducing sleeve (13), the inner of pressure reducing sleeve (13) is fixed on internal gland (7), the other end is cylindrical shell, extend out in the first static components (1), cylindrical shell is two-part by the spatial separation between the first static components (1) and internal gland (7) and pump shaft (01), forms the flow circuits of medium.
8. a kind of mechanical seal device that bears high pressure according to claim 7, it is characterized in that: the inner of described pressure reducing sleeve (13) is provided with labyrinth part (14), the exterior edge face of the interior edge face of pressure reducing sleeve (13) and labyrinth part (14) is equipped with the axial labyrinth teeth at least two roads, the mazy flow channel for liquids of both mutual chimeric formation, the inner ring the inside of pressure reducing sleeve (13) is stretched in the outer end of above-mentioned labyrinth part (14), labyrinth part (14) stretches on the outer diametric plane of pressure reducing sleeve (13) inner round portion and has at least two road throttling grooves, during pump shaft (01) High Rotation Speed, medium flows into throttling groove through mazy flow channel for liquids, through throttling groove, along the aperture surface of pressure reducing sleeve (13) and the gap between pump shaft (01), flow to the sealing surface inner radius that the first static components (1) and moving ring assembly (2) form, after cooling sealing face, flow to the gap between the outer diametric plane of the first static components (1) and the same pressure reducing sleeve of internal gland (7) (13), by the inclined hole (05) being opened on internal gland (7), export to one-level decompressing connection (06).
9. a kind of mechanical seal device that bears high pressure according to claim 8, it is characterized in that: on described outer press cover (5), have sealing liquid import (03) and sealing liquid outlet (04), sealing fluid flow to the sealing surface outer radius of the first static components (1) and moving ring assembly (2) formation through sealing liquid import (03), after cooling sealing face, by the pumping effect between the spiral chute on rotating seat (2F) and baffling cover (6), sealing fluid is directed to the sealing surface outer radius of the second static components (3) and moving ring assembly (2) formation, after cooling sealing face, through sealing liquid outlet (04), derive.
10. a kind of mechanical seal device that bears high pressure according to claim 9, is characterized in that: the outer end of described axle sleeve (4) is fastened on pump shaft (01) by drive unit (8); Above-mentioned drive unit (8) comprises inner sleeve, left ring and right ring, high in the middle of the outer diametric plane of inner sleeve, two ends are low, form two inclined-planes, left ring and right ring are set in respectively on two inclined-planes, and when left ring and right ring are compressed by screw, left ring and right ring are all close to centre, both inner ring produce pressure-acting with in put, inner sleeve and then compress axle sleeve (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320863327.2U CN203770201U (en) | 2013-12-26 | 2013-12-26 | Mechanical sealing device capable of bearing high pressure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320863327.2U CN203770201U (en) | 2013-12-26 | 2013-12-26 | Mechanical sealing device capable of bearing high pressure |
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| CN203770201U true CN203770201U (en) | 2014-08-13 |
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| CN201320863327.2U Expired - Lifetime CN203770201U (en) | 2013-12-26 | 2013-12-26 | Mechanical sealing device capable of bearing high pressure |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696524A (en) * | 2015-02-13 | 2015-06-10 | 江苏科奥流体科技有限公司 | Mechanical sealing structure of hot water pump |
| CN105276195A (en) * | 2015-11-23 | 2016-01-27 | 浙江威隆机械科技有限公司 | Packaging sealing device for double-support pump |
| CN105757254A (en) * | 2016-05-09 | 2016-07-13 | 成都通密封股份有限公司 | Floating type static spring seat and mechanical sealing structure thereof |
| CN106352106A (en) * | 2016-09-20 | 2017-01-25 | 杭州电子科技大学 | Ball valve having high heat dissipation performance and adopting combined floating sealing |
| CN106609846A (en) * | 2015-10-22 | 2017-05-03 | 浙江海峰制鞋设备有限公司 | Behind-pump sealing device |
| CN110486475A (en) * | 2019-09-12 | 2019-11-22 | 中国石油大学胜利学院 | A kind of wave bullet formula mechanically-sealing apparatus |
| CN112963542A (en) * | 2021-02-01 | 2021-06-15 | 北京航空航天大学 | Mechanical seal structure suitable for fuel cooling turbine |
| CN117018915A (en) * | 2023-06-15 | 2023-11-10 | 深圳市尚水智能股份有限公司 | Mixing device and cladding machine |
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2013
- 2013-12-26 CN CN201320863327.2U patent/CN203770201U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696524A (en) * | 2015-02-13 | 2015-06-10 | 江苏科奥流体科技有限公司 | Mechanical sealing structure of hot water pump |
| CN106609846A (en) * | 2015-10-22 | 2017-05-03 | 浙江海峰制鞋设备有限公司 | Behind-pump sealing device |
| CN106609846B (en) * | 2015-10-22 | 2019-04-16 | 浙江海峰制鞋设备有限公司 | Sealing device after a kind of pump |
| CN105276195A (en) * | 2015-11-23 | 2016-01-27 | 浙江威隆机械科技有限公司 | Packaging sealing device for double-support pump |
| CN105757254A (en) * | 2016-05-09 | 2016-07-13 | 成都通密封股份有限公司 | Floating type static spring seat and mechanical sealing structure thereof |
| CN106352106A (en) * | 2016-09-20 | 2017-01-25 | 杭州电子科技大学 | Ball valve having high heat dissipation performance and adopting combined floating sealing |
| CN110486475A (en) * | 2019-09-12 | 2019-11-22 | 中国石油大学胜利学院 | A kind of wave bullet formula mechanically-sealing apparatus |
| CN112963542A (en) * | 2021-02-01 | 2021-06-15 | 北京航空航天大学 | Mechanical seal structure suitable for fuel cooling turbine |
| CN112963542B (en) * | 2021-02-01 | 2021-11-26 | 北京航空航天大学 | Mechanical seal structure suitable for fuel cooling turbine |
| CN117018915A (en) * | 2023-06-15 | 2023-11-10 | 深圳市尚水智能股份有限公司 | Mixing device and cladding machine |
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Address after: Room 1101, No. 11, 1st Road, Sanyong Industrial Park, Zhongtang Town, Dongguan City, Guangdong Province, 523507 Patentee after: Guangdong Huahui Intelligent Equipment Co.,Ltd. Address before: 523000 Chajiao Industrial Park, Zhongtang Town, Dongguan City, Guangdong Province Patentee before: DONGGUAN HUAHUI PRECISION MACHINERY CO.,LTD. |
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Granted publication date: 20140813 |
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| CX01 | Expiry of patent term |