CN203082218U - High-lower temperature general type sealing device for welded metal corrugated tube - Google Patents
High-lower temperature general type sealing device for welded metal corrugated tube Download PDFInfo
- Publication number
- CN203082218U CN203082218U CN 201220660317 CN201220660317U CN203082218U CN 203082218 U CN203082218 U CN 203082218U CN 201220660317 CN201220660317 CN 201220660317 CN 201220660317 U CN201220660317 U CN 201220660317U CN 203082218 U CN203082218 U CN 203082218U
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- Prior art keywords
- ring
- seal
- corrugated tube
- bellows
- rings
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- Expired - Fee Related
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- Mechanical Sealing (AREA)
- Diaphragms And Bellows (AREA)
Abstract
The utility model discloses a high-low temperature general type sealing device for a welded metal corrugated tube. The high-low temperature general type sealing device for the welded metal corrugated tube comprises sealing glands, shaft sleeves, stationary seal rings and rotating seal ring assemblies, wherein each rotating seal ring assembly comprises a rotating seal ring, a corrugated tube core, a basic ring and a transmission ring. The rotating seal ring, the corrugated tube core, the basic ring and the transmission ring are sequentially distributed along the axial direction. The transmission rings and the shaft sleeves are fixed, and each corrugated tube core comprises a corrugated tube, a ring base and a transition ring, wherein the ring base and the transition ring are connected at the two ends of the corrugated tube in a welding mode. The transition rings are connected on the basic rings in a welding mode, the rotating sealing rings and the ring bases are connected through axial hinge pins in a floating mode, a first seal ring is arranged between each rotating seal ring and each ring base, and the stationary seal rings are fixed on the sealing glands. Due to the fact that the rotating seal rings and the ring bases are assembled through the axial hinge pins in a flexible floating mode, the problem of transformation or ring disengaging of the seal end faces does not exist when using temperature change, and tight attaching of the seal faces is guaranteed.
Description
Technical field
The utility model relates to the universal welded metal bellow seal arrangement of a kind of high low temperature.
Background technique
Edge welded metal-bellows mechanical seal device is widely used in industries uses such as petrochemical industry, thermoelectricity, paper pulp, chemical industry to have in the fluid machinery of turning round equipment.Edge welded metal-bellows mechanical seal device, its sealing effect depend on the applying degree of seal face and the stretch compensation of welded metal bellow, and these two factors directly have influence on the condensate film stability of sealing surface.
At present about in the high low temperature mechanical sealing design, seal ring adopts inlays ring structure, inlaying ring adopts graphite or cemented carbide directly to be embedded in the stainless steel ring seat, because inlaying ring has a long way to go with ring seat line of material expansion coefficient, easy decylization when the temperature difference is big, and strengthen when inlaying magnitude of interference, then seal face is yielding, planeness does not reach 0.0009mm, causes the sealing effect leakage rate to strengthen or seal failure.
In addition, bellows elastic force is difficult for controlling, if the bellows stretch compensation is too small, can cause the flowing medium leakage rate to strengthen, if stretch compensation is excessive, then sealing surface is prone to dry friction, causes sealing premature failure; And when the sealing serviceability temperature surpassed 176 ℃, the easy high temperature of bellows material lost bullet, can cause the excessive or inefficacy of seal leakage amount.
The model utility content
The purpose of this utility model provides the universal welded metal bellow seal arrangement of a kind of high low temperature.
The universal welded metal bellow seal arrangement of a kind of high low temperature that provides according to the utility model, comprise sealing gland, axle sleeve, stationary ring and moving ring assembly, wherein, moving ring assembly comprises the rotating ring of axial distribution successively, the ripple tube core, basic ring and transmission ring, basic ring and transmission ring are fixed, and transmission ring and axle sleeve are fixed, the ripple tube core comprises bellows, and the ring seat and the transition ring that are welded in the bellows two ends, transition ring is welded on the basic ring, be connected and float by axial bearing pin between rotating ring and the ring seat, and be provided with first seal ring between rotating ring and the ring seat, stationary ring is fixed on the sealing gland.
Its beneficial effect is: realize flexible floating type assembling by axial bearing pin between rotating ring and the ring seat, compare and inlay fit, when serviceability temperature changes, do not have the problem of seal face distortion or decylization, guaranteed fitting tightly of sealing surface.But the standardization of ripple tube core is produced in batches.
A kind of optimal way, described bellows comprises the lug of continuously alternately welding and recessed, lug and recessed outside diameter all has straight section, and internal side diameter is bellows segment, lug and recessed straight section is vertical symmetrical distribution, the angle of two straight sections is 6 °, and bellows segment the inner of lug and recessed all has and is 44 ° inclination angle with substantially horizontal.Its beneficial effect is: produce with joint efforts in internal diameter edge when bellows is subjected to external force, can be decomposed into radial component and axial thrust load, axial thrust load is presented as elastic compensating power, radial component then can make interior external diameter of wave plate and waveform change, and the angle of two straight sections can produce a reaction force when minor variations takes place, this reaction force can be eliminated the irregular variation tendency of bellows segment, makes the linear variation of bellows elastic force.And bellows is in certain decrement scope, and straight section is overlapping, and 44 ° of inclination angles of bellows segment have 3 ° synchronous variation, and the operating angle of bellows segment the inner is maintained between 44 ° ~ 47 °.By a large amount of research test of inventor, bellows can keep bellows elastic force to be linear change in this inclination angle scope, simultaneously can overcome bellows produces fatigue ruption under the elastic force effect that works long hours trend, effectively improve the fatigue resistance of bellows weld seam, the final stability that keeps the seal face fluid film lubrication can prolong sealing working life.
A kind of optimal way, the inboard of described basic ring has heavy stand, is provided with second seal ring in the heavy stand, butt one gasket ring between second seal ring and the transmission ring.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described further.
Fig. 1 is the part-structure generalized section of the universal welded metal bellow seal arrangement of high low temperature that provides of embodiment.
Fig. 2 is bellows lug and a recessed chip architecture schematic representation among the embodiment.
Embodiment
With reference to figure 1, the universal welded metal bellow seal arrangement of a kind of high low temperature, comprise sealing gland (not shown), axle sleeve 300, stationary ring 100 and moving ring assembly, wherein, moving ring assembly comprises the rotating ring 210 of axial distribution successively, ripple tube core 200, basic ring 230 and transmission ring 240, basic ring 230 is fixing by axial screw and transmission ring 240, the inboard of basic ring 230 has heavy stand, be provided with second seal ring 410 in the heavy stand, butt one gasket ring 411 between second seal ring 410 and the transmission ring 240, and transmission ring 240 is fixing by radially screw and axle sleeve 300, ripple tube core 200 comprises bellows 221, and the ring seat 222 and the transition ring 223 that are welded in bellows 221 two ends, transition ring 223 is welded on the basic ring 230, ring seat 222 1 ends are provided with axial bearing pin 224, and an end of rotating ring 210 is provided with the pin-and-hole corresponding with bearing pin 224, fixing between rotating ring 210 and the ring seat 222 by bearing pin 224, but and axial float, be provided with first seal ring 420 between rotating ring 210 and the ring seat 222, stationary ring 100 is fixed on the sealing gland, is provided with the 3rd seal ring 430 between stationary ring 100 and sealing gland.Realize flexible floating type assembling by axial bearing pin 224 between rotating ring 210 and the ring seat 222, when serviceability temperature changes, do not have the problem of seal face distortion or decylization, guaranteed fitting tightly of sealing surface.But 200 standardization of ripple tube core are produced in batches.
With reference to figure 2, bellows 221 comprises the lug 225 of continuously alternately welding and recessed 226, lug 225 and recessed 226 outside diameter all has straight section, and internal side diameter is bellows segment, lug 225 is vertical symmetrical distribution with recessed 226 straight section, the angle of two straight sections is 6 °, and bellows segment the inner of lug 225 and recessed 226 all has and is 44 ° inclination angle with substantially horizontal.When being subjected to external force, bellows 221 produces the T that makes a concerted effort in internal diameter edge, can be decomposed into radial component Tv and axial thrust load Th, axial thrust load Th is presented as elastic compensating power, radial component Tv then can make interior external diameter of wave plate and waveform change, and the angle of two straight sections can produce a reaction force when minor variations takes place, this reaction force can be eliminated the irregular variation tendency of bellows segment, makes the linear variation of bellows elastic force.And bellows 221 is in certain decrement scope, and straight section is overlapping, and 44 ° of inclination angles of bellows segment have 3 ° synchronous variation, and the operating angle of bellows segment the inner is maintained between 44 ° ~ 47 °.By a large amount of research test of inventor, bellows can keep bellows elastic force to be linear change in this inclination angle scope, simultaneously can overcome bellows produces fatigue ruption under the elastic force effect that works long hours trend, effectively improve the fatigue resistance of bellows weld seam, the final stability that keeps the seal face fluid film lubrication can prolong sealing working life.
When temperature in the working condition was between-25 ℃～176 ℃, above-mentioned each seal ring was selected synthetic rubber elasticity O type circle for use, selected Expanded graphite when 176 ℃＜425 ℃ of temperature＜-25 ℃ or temperature for use.
Certainly, above embodiment just is explanation rather than restriction the utility model, the above only is preferred embodiment of the present utility model, so all equivalences of being done according to the described scheme of the utility model patent claim change or modify, is included in the utility model patent claim.
Claims (3)
1. the universal welded metal bellow seal arrangement of high low temperature comprises sealing gland, axle sleeve, stationary ring and moving ring assembly, it is characterized in that:
Described moving ring assembly comprises rotating ring, ripple tube core, basic ring and the transmission ring of axial distribution successively, and basic ring and transmission ring are fixed, and transmission ring and axle sleeve are fixed,
Ring seat and transition ring that the ripple tube core comprises bellows and is welded in the bellows two ends, transition ring is welded on the basic ring, is connected and float by axial bearing pin between rotating ring and the ring seat, and is provided with first seal ring between rotating ring and the ring seat,
Stationary ring is fixed on the sealing gland.
2. the universal welded metal bellow seal arrangement of a kind of high low temperature according to claim 1, it is characterized in that: described bellows comprises the lug of continuously alternately welding and recessed, lug and recessed outside diameter all has straight section, and internal side diameter is bellows segment, lug and recessed straight section is vertical symmetrical distribution, the angle of two straight sections is 6 °, and bellows segment the inner of lug and recessed all has and is 44 ° inclination angle with substantially horizontal.
3. the universal welded metal bellow seal arrangement of a kind of high low temperature according to claim 1, it is characterized in that: the inboard of described basic ring has heavy stand, is provided with second seal ring in the heavy stand, butt one gasket ring between second seal ring and the transmission ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220660317 CN203082218U (en) | 2012-12-05 | 2012-12-05 | High-lower temperature general type sealing device for welded metal corrugated tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220660317 CN203082218U (en) | 2012-12-05 | 2012-12-05 | High-lower temperature general type sealing device for welded metal corrugated tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203082218U true CN203082218U (en) | 2013-07-24 |
Family
ID=48828059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220660317 Expired - Fee Related CN203082218U (en) | 2012-12-05 | 2012-12-05 | High-lower temperature general type sealing device for welded metal corrugated tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203082218U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2544512A (en) * | 2015-11-19 | 2017-05-24 | Aes Eng Ltd | 2-part clamping ring method |
-
2012
- 2012-12-05 CN CN 201220660317 patent/CN203082218U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2544512A (en) * | 2015-11-19 | 2017-05-24 | Aes Eng Ltd | 2-part clamping ring method |
| GB2546375A (en) * | 2015-11-19 | 2017-07-19 | Aes Eng Ltd | 2-par clamp ring method |
| GB2546375B (en) * | 2015-11-19 | 2019-03-27 | Aes Eng Ltd | 2-part clamping ring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20211205 |