CN103016742B - High-pressure-resistant mechanical sealing device - Google Patents
High-pressure-resistant mechanical sealing device Download PDFInfo
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- CN103016742B CN103016742B CN201310000620.0A CN201310000620A CN103016742B CN 103016742 B CN103016742 B CN 103016742B CN 201310000620 A CN201310000620 A CN 201310000620A CN 103016742 B CN103016742 B CN 103016742B
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- throw
- out collar
- ring
- axial
- seat
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Abstract
The invention provides a high-pressure-resistant mechanical sealing device. The high-pressure-resistant mechanical sealing device comprises a moving ring and a static ring, wherein the moving is axially fixed and can rotate with a shaft; the static ring is arranged opposite to the moving ring through a shaft end sealing surface and can axially float; and the static ring and a pushing ring seat form floating support through a pushing ring and an elastic structure which are in contact with the non-sealed axial end of the static ring. The pushing ring adopts a cylindrical structure in which a radial extending plate sheet is arranged on the peripheral part adjacent to an axial end; the extending end surface of the cylindrical structure adjacent to the plate sheet is in contact with the axial end surface of the static ring; and the pushing ring seat adopts a cylindrical structure with step holes including an axial central hole. The outer cylindrical surface of the cylindrical structure of the pushing ring is in clearance fit with the inner hole surface of a central hole of a radial annular plane structure of the pushing ring seat; and a sealing ring is arranged at the fitting part. Through the adoption of the high-pressure-resistant mechanical sealing device provided by the invention, the influences of the deformation of the pushing ring on the floating property and the conical deformation of the pushing ring seat guide cylinder surface are obviously reduced, the concentration states of stresses in various positions in the pushing ring seat with the traditional structure are greatly reduced, the pressure resistance and the sealing stability are obviously improved, the service life is obviously prolonged, and convenience in finishing parts is provided.
Description
Technical field
The present invention relates to a kind of mechanical seal device of rotating equipment axial end, a particularly high voltage bearing axial end mechanical seal device, can be used for the axial end sealing that the compressor of various types, decompressor, seperator, pump, reactor etc. rotate class machine.
Background technique
A kind of typical mechanical seal structure as shown in Figure 1, comprise axial restraint and the rotating ring (1) that can rotate with axle (20), and the irrotational stationary ring (2) also can making axial float is oppositely arranged through axle head sealing surface and rotating ring (1), throw-out collar and elastic structure (6) floating support that stationary ring (2) is then arranged through contacting with its non-tight axial end are between throw-out collar seat.Throw-out collar seat is wherein one " annular groove " formula structure formed with radial ring plane structure by inner side tubular perisporium (18) and outside tubular perisporium (29); The basic throw-out collar (4) in single radial plane structure directly contacted with the end face of stationary ring, then with its inner hole surface Spielpassung on the outer circumferential face of throw-out collar seat inside cylindrical structure (18).As the rotating ring axial restraint of sealing core component, stationary ring axial float, is directly contacted by its axial relative seal face or small―gap suture is separated the sealing realizing medium.Practice display, the stability of sealing and the pressure of sealed medium closely related.When the pressure of sealing medium is lower, the structural design, craft precision, matching requirements, material selection etc. of sealing have larger leeway, and can meet well by the field condition of sealing unit, guarantee the stable operation sealed; But along with the rising of sealed medium pressure, the series of parameters such as leakage rate, distortion, end face frictional wear of sealing is all in deterioration.In fact, when pressure medium is higher than 15MPa, sealing condition can sharply worsen, and has been difficult to the performance effectively improving sealing at present from the general treatment measures of the aspects such as structure, technique, assembling, material.
Find through theoretical calculation and test, the face deformation of stationary ring causes the one of the main reasons that seal leakage amount increases, end face frictional wear aggravates, and the throw-out collar be connected with stationary ring and throw-out collar seat are related to the constrained of stationary ring, force-bearing situation and floatability, these all can affect the face deformation of stationary ring to a certain extent.Due to when pressure medium is higher, it is large that throw-out collar and throw-out collar seat there will be amount of deformation, and localized stress is high, even occurs plastic deformation, localized cracks etc., causes seal failure.When pressure medium is higher, its Problems existing is mainly manifested in:
1) throw-out collar compressive strain radially and increasing perpendicular to the torsional deflection of circumference.Wherein radial excessive compressive strain may affect coordinating of the inner hole surface of throw-out collar and the circumferential outer surface of tubular perisporium inside throw-out collar seat, causes the floatability of throw-out collar to be deteriorated; Torsional deflection increases then may make its end face contacted with stationary ring change the constrained of stationary ring;
2) distortion of throw-out collar seat is large, stress raisers.The medial and lateral tubular perisporium be connected with radial ring plane is all in cantilever-shaped structure, under the effect of high-pressure medium pressure, distortion is large, particularly crucial inner side tubular peripheral wall structure can present the distortion of nearly taper, significantly can affect the floatability of throw-out collar and the sealability of seal ring; And the stress that two corner portion that radial ring plane is connected with medial and lateral tubular perisporium (16,17) also all exist highly significant is concentrated, and may occur plastic deformation or localized cracks;
3) due to the existence of outside tubular peripheral wall structure, make the external cylindrical surface of inner side tubular perisporium crucial in throw-out collar seat be not easy to fine finishing, finally can affect the floatability of throw-out collar.
Therefore, appropriate design throw-out collar and throw-out collar seat are important keys of elevating mechanism sealing stability.
Summary of the invention
Given this, the invention provides and a kind ofly adopt the throw-out collar of modified node method and the mechanical seal device of throw-out collar seat, particularly a kind of mechanical seal device with high pressure resistant property.
The basic structure of the high pressure resistant mechanical seal device of the present invention, include axial restraint equally and the rotating ring that can rotate with the axis and be oppositely arranged through axle head sealing surface and rotating ring and can make the irrotational stationary ring of axial float, stationary ring warp contacts with its non-tight axial end the throw-out collar and elastic structure and throw-out collar seat floating support that arrange.Wherein, the said throw-out collar by elastic structure and throw-out collar seat floating support, for being provided with the tubular structure of radial abduction disc at the peripheral part adjacent with an axial end, this tubular structure overhanging end face adjacent with disc contacts with the axial end of stationary ring; Throw-out collar seat is the tubular structure with the shoulder hole comprising axial center hole.The tubular structure of throw-out collar with the center hole inner hole surface Spielpassung of its external cylindrical surface and throw-out collar seat radial ring plane structure, and is provided with seal ring at its matching part.
Because the throw-out collar structure in the above-mentioned seal arrangement of the present invention have employed the tubular structure that a kind of peripheral part adjacent at one axial end is provided with radial abduction disc, and only with disc the overhanging end face of this tubular structure of neighbour contact with the non-tight axial end of stationary ring, disc portoin then axially retreat and only adjacent with stationary ring, even if therefore disc produces the floatability that distortion also significantly can not affect stationary ring, and being also more convenient for the fine finishing of tubular structure external cylindrical surface for coordinating with throw-out collar seat in throw-out collar, being conducive to the floatability ensureing throw-out collar.Meanwhile, the reduction of this tubular structure end face contacted with stationary ring axial end, is equally also more conducive to it and processes and obtain enough surface configuration precision, ensure and improve the sealability of its surface of contact.Due to the change of fit system between this throw-out collar of the present invention and throw-out collar seat, corresponding throw-out collar seat is then corresponding has changed the tubular structure only having outside tubular perisporium into, and be no longer in having as conventional construction simultaneously, " annular groove " formula structure of outside tubular perisporium, thus be conducive to reducing pressure medium to the action range of throw-out collar seat, the distortion of throw-out collar seat is also reduced to the radial expansion that only can produce the outside tubular peripheral wall structure that throw-out collar floatability does not make significant difference and is out of shape, and/or the torsional deflection of the radial ring plane structure of band axial center hole, and the position that a stress is concentrated only can be formed in throw-out collar seat, the stress raisers of throw-out collar seat are significantly reduced.
On said structure basis, high pressure resistant mechanical seal device of the present invention can also separately or combination in any mode select the optimal way taked to comprise further:
The tubular structure of the axial both sides of disc is arranged in said throw-out collar, the outer circumferential face diameter contacting the overhanging end of side with stationary ring is greater than the diameter with the outer circumferential face of the center hole inner hole of throw-out collar seat radial ring plane structure, the throw-out collar that makes that pressure medium (Pascal) is produced is greater than to the power in stationary ring direction the power making it be separated, and the direction making it make a concerted effort pushes throw-out collar to floating ring, thus be conducive to guaranteeing the tracing ability of floating ring to throw-out collar, improve and prevent pressure medium from making throw-out collar be separated the stable and reliable of the seal failure caused with floating ring;
The axial thickness of said throw-out collar discs internal side diameter is greater than the axial thickness of its outside diameter, is conducive to the non-deformability improving disc portoin; Further,
The axial thickness of said throw-out collar discs is that cascade increases progressively by outer radial periphery is centripetal;
The internal side diameter of the said overhanging end face of throw-out collar tubular structure contacted with stationary ring axial end, has the taper hole face structure of adduction.Generally, it is all allow that radius side width for the overhanging end face of this throw-out collar tubular structure contacted with the axial end of stationary ring remains 1 ~ 20 millimeter, put before this and its internal side diameter position is set to said adduction taper hole face, suitably reduce the radial width of itself and stationary ring counterface, can ensure, under the prerequisite that unlikely surface of contact leaks, make it be easier to process and obtain enough surface configuration precision;
Be positioned at the disc root of throw-out collar tubular structure overhanging end side, be provided with the seal ring that can contact with stationary ring end face;
On said throw-out collar tubular structure external cylindrical surface, be at least provided with wear-resistant material layer at the position can matched with throw-out collar seat center hole inner hole surface, be beneficial to improve working life.
By the corner portion to tubular perisporium and radial ring plane structure outside the throw-out collar seat in the above-mentioned seal arrangement of the present invention, the inner hole surface external angle of radial ring plane structure center hole, and the external angle of the external cylindrical surface of throw-out collar tubular structure, with the radial ring plane of " annular groove " type throw-out collar seat in traditional mechanical seal device and interior, two corner portion (16 between the tubular perisporium of outside, 17) and the stress in the overhanging end bight of inner side tubular perisporium external cylindrical surface and deformation gauge calculation and Analysis show, throw-out collar of the present invention has less amount of deformation and distortion cone angle when there is radial deformation, the cone angle produced after distortion is about 0.4 ~ 1 ", the diametrically amount of deformation at its axial two ends is about 2 ~ 5 microns, and the distortion of the inner side tubular peripheral wall structure external cylindrical surface play the guiding role in traditional mechanical seal is more uneven, the cone angle produced after distortion is about 6 ~ 25 ", axial two ends diametrically amount of deformation are about 30 ~ 130 microns, in throw-out collar seat of the present invention, this corner stress raiser has and less does one's utmost extreme value, outside more traditional mechanical seal, the corner (16) of tubular perisporium about reduces 5 ~ 15%, and the maximum stress of the inner hole surface external angle of throw-out collar seat center hole of the present invention, be only 3 ~ 11% of tubular perisporium corner (17) maximum stress inside traditional mechanical seal.Therefore, the taper that the mechanical seal device of said structure form of the present invention can reduce the cylindrical fit face play the guiding role between throw-out collar and throw-out collar seat is well out of shape, and significantly reduces the stress collected state in throw-out collar seat.And be more convenient for the manufacturing at each fitting surface position that precision machining needs.
Below in conjunction with the embodiment by accompanying drawing illustrated embodiment, foregoing of the present invention is described in further detail again.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following example.Without departing from the idea case in the present invention described above, the various replacement made according to ordinary skill knowledge and customary means or change, all should comprise within the scope of the invention.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of typical conventional construction mechanical seal device.
Fig. 2 is a kind of structural representation of the high pressure resistant mechanical seal device of the present invention.
Fig. 3 is the structure for amplifying schematic diagram of throw-out collar seat in Fig. 2.
Fig. 4 is that the K of the structure of throw-out collar shown in Fig. 3 is to local state schematic diagram.
Fig. 5 is the another kind of structural representation of the high pressure resistant mechanical seal device of the present invention.
Embodiment
Shown in Fig. 2 ~ Fig. 4 is a kind of basic structure form of the high pressure resistant mechanical seal device of the present invention, include axial restraint and the rotating ring 1 that can rotate with axle 20, with be oppositely arranged through axle head sealing surface and rotating ring 1 and the irrotational stationary ring 2 of axial float can be made, the elastic structure 6 that the throw-out collar that stationary ring 2 is arranged through contacting with its non-tight axial end and spring etc. are conventional and throw-out collar seat 5 floating support.Said by elastic structure 6 this throw-out collar with throw-out collar seat 5 floating support, for being provided with the tubular structure 10 of radial abduction disc 4 at the peripheral part adjacent with an axial end.Wherein, the axial thickness of the internal side diameter of disc 4 is greater than the axial thickness of its outside diameter, and is increased progressively to internal side diameter by outside diameter for ladder 7 formula.This tubular structure 10 overhanging end face 13 adjacent with disc 4 contacts with the axial end of stationary ring 2,3, this side end face of disc 4 is adjacent with the opposing end surface of stationary ring 2, and the root of this end face side at disc 4, the seal ring 81 that can contact with the opposing end surface of stationary ring 2 is provided with through corresponding groove.Meanwhile, be arranged in the tubular structure 10 of the axial both sides of disc 4, the diameter contacting the outer circumferential face 12 of the overhanging end of side with stationary ring 2 is greater than opposite side, namely with the diameter of the outer circumferential face 11 of the center hole inner hole of throw-out collar seat 5 radial ring plane structure.
Throw-out collar seat 5 is the tubular structure 19 with the shoulder hole comprising axial center hole.Throw-out collar is with the center hole inner hole surface Spielpassung of the external cylindrical surface 11 of its tubular structure 10 with throw-out collar seat 5 radial ring plane structure, and be at least provided with as the wear-resistant material layer such as diamond coatings or ceramic coating 9 at the external cylindrical surface position can matched with the center hole inner hole surface of throw-out collar seat 5, between its matching part, also corresponding groove structure is provided with seal ring 82.The internal side diameter of the overhanging end face of tubular structure 10 of the throw-out collar contacted with stationary ring 2 axial end, for having taper hole face 14 structure of adduction.On the inside radial face of the radial ring plane structure of throw-out collar seat 5, the position structure of the forms such as several grooves for arranging the elastic structures such as spring 6 can also be circumferentially evenly set in the usual way.
Fig. 5 is the another kind of structural type of the high pressure resistant mechanical seal device of the present invention.The axial thickness being embodied in throw-out collar discs 4 with the essential difference of Fig. 2 structure is increase progressively to internal side diameter the form that the axial thickness becoming its root is greater than its outer radial periphery thickness by outside diameter with cascade merely, is not provided with the seal ring 81 that can contact with the opposing end surface of stationary ring 2 again.
Various structures shown in figure only relate to the form of single-stage sealing.In actual use, can there be multiple pattern in the total arrangement of seal arrangement of the present invention as required, as labyrinth (more than two-stage) in the middle of mechanical single seal, double seals, tandem seal (more than two-stage), series connection band etc., and combined labyrinth and carbon gland can be formed with other seals style such as floating-ring seal, carbon ring seal, labyrinth seals further, those skilled in the art all can be achieved according to the content of the above-mentioned seal arrangement of the present invention.
Claims (7)
1. high pressure resistant mechanical seal device, comprise axial restraint and the rotating ring (1) that can rotate with axle (20), with be oppositely arranged through axle head sealing surface and rotating ring (1) and the irrotational stationary ring (2) of axial float can be made, throw-out collar and elastic structure (6) that stationary ring (2) is arranged through contacting with its non-tight axial end and throw-out collar seat (5) floating support, it is characterized in that said by the throw-out collar of elastic structure (6) with throw-out collar seat (5) floating support, for being provided with the tubular structure (10) of radial abduction disc (4) at the peripheral part adjacent with an axial end, this tubular structure (10) the overhanging end face (13) adjacent with disc (4) contacts with the axial end of stationary ring (2), throw-out collar seat (5) is the tubular structure (19) with the shoulder hole comprising axial center hole, the tubular structure (10) of throw-out collar is with the center hole inner hole surface Spielpassung of its external cylindrical surface (11) with throw-out collar seat (5) radial ring plane structure, and be provided with seal ring (82) at its matching part.
2. high pressure resistant mechanical seal device as claimed in claim 1, it is characterized in that the tubular structure (10) being arranged in disc (4) axial both sides in said throw-out collar, the diameter contacting the outer circumferential face (12) of the overhanging end of side with stationary ring (2) is greater than the diameter with the external cylindrical surface (11) of the center hole inner hole of throw-out collar seat (5) radial ring plane structure.
3. high pressure resistant mechanical seal device as claimed in claim 1, is characterized in that the axial thickness of the internal side diameter of said throw-out collar discs (4) is greater than the axial thickness of its outside diameter.
4. high pressure resistant mechanical seal device as claimed in claim 3, is characterized in that the axial thickness of said throw-out collar discs (4) is for be increased progressively to internal diameter side steps formula by outside diameter.
5. high pressure resistant mechanical seal device as claimed in claim 1, is characterized in that the internal side diameter of tubular structure (10) the overhanging end face of the throw-out collar contacted with stationary ring (2) axial end has taper hole face (14) structure of adduction.
6. high pressure resistant mechanical seal device as claimed in claim 1, is characterized in that disc (4) root in the tubular structure being positioned at throw-out collar (10) overhanging end side, is provided with the seal ring (81) that can contact with stationary ring (2) end face.
7. high pressure resistant mechanical seal device as claimed in claim 1, is characterized in that on throw-out collar tubular structure (10) external cylindrical surface, is at least provided with wear-resistant material layer (9) at the position can matched with throw-out collar seat (5) center hole inner hole surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310000620.0A CN103016742B (en) | 2013-01-04 | 2013-01-04 | High-pressure-resistant mechanical sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310000620.0A CN103016742B (en) | 2013-01-04 | 2013-01-04 | High-pressure-resistant mechanical sealing device |
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| Publication Number | Publication Date |
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| CN103016742A CN103016742A (en) | 2013-04-03 |
| CN103016742B true CN103016742B (en) | 2015-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310000620.0A Active CN103016742B (en) | 2013-01-04 | 2013-01-04 | High-pressure-resistant mechanical sealing device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107654653A (en) * | 2017-09-15 | 2018-02-02 | 浙江鲁溪密封件有限公司 | A kind of mechanically-sealing apparatus |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4933614B1 (en) * | 1968-06-05 | 1974-09-07 | ||
| US3921819A (en) * | 1974-07-26 | 1975-11-25 | Kidde & Co Walter | Boom latch mechanism |
| DE3722110A1 (en) * | 1987-07-03 | 1989-01-12 | Burgmann Dichtungswerk Feodor | THE ARRANGEMENT OF A GAS LUBRICATED MECHANICAL SEAL AND SEAL ARRANGEMENT FOR A SHAFT |
| EP0470409A1 (en) * | 1990-07-18 | 1992-02-12 | Ebara Corporation | Noncontacting face seal |
| CA2126779A1 (en) * | 1993-06-28 | 1994-12-29 | Glenn G. Pecht | Non-contacting, gap-type seal having a ring with a patterned microdam seal face |
| CN1828098A (en) * | 2006-01-27 | 2006-09-06 | 浙江工业大学 | Non-contact mechanical end face sealing structure |
| CN202992174U (en) * | 2013-01-04 | 2013-06-12 | 四川日机密封件股份有限公司 | High-pressure-resisting mechanical sealing device |
-
2013
- 2013-01-04 CN CN201310000620.0A patent/CN103016742B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4933614B1 (en) * | 1968-06-05 | 1974-09-07 | ||
| US3921819A (en) * | 1974-07-26 | 1975-11-25 | Kidde & Co Walter | Boom latch mechanism |
| DE3722110A1 (en) * | 1987-07-03 | 1989-01-12 | Burgmann Dichtungswerk Feodor | THE ARRANGEMENT OF A GAS LUBRICATED MECHANICAL SEAL AND SEAL ARRANGEMENT FOR A SHAFT |
| EP0470409A1 (en) * | 1990-07-18 | 1992-02-12 | Ebara Corporation | Noncontacting face seal |
| CA2126779A1 (en) * | 1993-06-28 | 1994-12-29 | Glenn G. Pecht | Non-contacting, gap-type seal having a ring with a patterned microdam seal face |
| CN1828098A (en) * | 2006-01-27 | 2006-09-06 | 浙江工业大学 | Non-contact mechanical end face sealing structure |
| CN202992174U (en) * | 2013-01-04 | 2013-06-12 | 四川日机密封件股份有限公司 | High-pressure-resisting mechanical sealing device |
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|---|---|
| CN103016742A (en) | 2013-04-03 |
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Address after: Vuko Xisi road Chengdu City, Sichuan province 610045 No. 8 Patentee after: Zhongmi Holding Co., Ltd Address before: Vuko Xisi road Chengdu City, Sichuan province 610045 No. 8 Patentee before: Sichuan Sunny Seal Co., Ltd. |
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