CN101135377A - Combined mechanical sealing device - Google Patents
Combined mechanical sealing device Download PDFInfo
- Publication number
- CN101135377A CN101135377A CNA2006100374058A CN200610037405A CN101135377A CN 101135377 A CN101135377 A CN 101135377A CN A2006100374058 A CNA2006100374058 A CN A2006100374058A CN 200610037405 A CN200610037405 A CN 200610037405A CN 101135377 A CN101135377 A CN 101135377A
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- ring
- face
- rotating shaft
- stationary ring
- friction pair
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Abstract
This invention provides a combined machine sealing device. It includes moving ring, stationary ring, overlaying ring and sealing compartment. The sealing compartment includes end plate, internal and external sleeves at both sides. The end plate is fixed inside of casing body and is muff-coupled with rotating shaft. The external sleeve is muff-coupled with casing body. The internal sleeve thread connects to gland which is muff-coupled on rotating shaft. The overlaying ring is muff-coupled between internal sleeve and rotating shaft. Its both sides firmly attach to end plate and gland. The inner circumference of moving ring is fixed on rotating shaft. The outer circumference of moving ring external shoulder is muff-coupled to the inner circumference of external sleeve. The external end face of moving ring has compressing nut. The internal end face of moving ring firmly attaches to the step end face of rotating shaft. The internal end face of moving ring is embedded with 0 shaped ring. The stationary ring is movable muff-coupled between the inner circumference face external sleeve and outer circumference of moving ring. The internal end face of external sleeve has locating pin, which connects to the stationary ring. The outer circumference of stationary ring is embedded with 0 shaped ring. The ring groove of moving ring internal end face and stationary external end face are embedded with moving ring and stationary ring friction pairs. This invention is simple and low cost.
Description
Technical field
The present invention relates to the mechanical sealing technology of equipment running shaft, specifically be meant combined mechanical sealing device.
Background technique
At present, the physical dimension of existing traditional mechanical sealing is bigger, and complex structure uses, the maintenance requirement condition is higher, and reliability is lower, costs an arm and a leg, can't be under the mixed transportation of oil and gas operating mode proper functioning.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art, provide simple in structure, size is little, functional reliability is high, cost is low, applicable to the combined mechanical sealing device of oil and gas multiphase flow operating mode.
Purpose of the present invention is achieved through the following technical solutions: this combined mechanical sealing device, comprise rotating ring, stationary ring, folded ring, gas-tight silo, gas-tight silo comprises the inner and outer sleeves of end plate and both sides thereof, end plate be fixed on housing inboard and with the rotating shaft socket, outer sleeve and housing socket, inner sleeve periphery are threaded and are socketed in gland in the rotating shaft; Folded ring set is connected between inner sleeve and the rotating shaft, and its both sides are close to end plate and gland respectively; Rotating ring inner peripheral surface and rotating shaft are fixedly sleeved, the rotating ring outer end is provided with shoulder, the inner peripheral surface socket of shoulder outer circumferential face and outer sleeve, and the rotating ring exterior edge face is provided with gland nut, the step end face of rotating ring interior edge face and rotating shaft is close to, and the inner inner peripheral surface of rotating ring is embedded with zero shape circle and amplexiforms with rotating shaft sealing; Stationary ring is actively socketed between the outer circumferential face of the inner peripheral surface of outer sleeve and rotating ring, and the outer sleeve interior edge face is provided with locating stud and stationary ring interlocking, and the stationary ring outer circumferential face is embedded with zero shape circle and amplexiforms with the sealing of outer sleeve inner peripheral surface; Be embedded with rotating ring, the stationary ring friction pair that amplexiforms mutually in rotating ring interior edge face, both annular grooves of stationary ring exterior edge face respectively.
Must realize the present invention for better, the end plate of described gas-tight silo is provided with coolant duct, and its both ends open is respectively corresponding to the exterior edge face of stationary ring, the coolant duct outlet of housing.
Be provided with the less flexible integral ring-shaped spring of rigidity between described stationary ring exterior edge face and the outer sleeve interior edge face, described spring plays the pretension effect to stationary ring.
Have a plurality of lubrication grooves on described rotating ring, the stationary ring friction pair end face, described each lubrication groove evenly distributes along the circle both sides, middle footpath of friction pair end face, and each lubrication groove rear end starts from the cylindrical or the interior circle of friction pair end face, front end tilts to point to the middle footpath circle of friction pair end face but is no more than middle footpath circle, each lubrication groove rear end groove depth front end is shallow, and the angle of groove bottom and friction pair end face is an acute angle; The front end of each lubrication groove of described any friction pair end face points to consistent with pairing friction pair direction of relative movement.
Sealing principle of the present invention is: gas-tight silo of the present invention is divided into interior storehouse (inner sleeve), outer storehouse (outer sleeve), and interior storehouse is a self-tightening type mechanical sealing, and outer storehouse is provided with according to rated working pressure for folded ring sealing, outer storehouse folded ring number; In normal operation, whole seal operation are born in the folded ring sealing in outer storehouse, and the self-tightening type mechanical sealing in interior storehouse is load not, does not therefore also need cooling liquid; Work in the machine superpressure, under the situation of perhaps folded ring seal break-off, working medium enters Nei Cang, working medium pressure promotes stationary ring and presses to rotating ring, the coolant system that starts the machine simultaneously provides cooling liquid, self-tightening type mechanical sealing work, the self-tightening type mechanical sealing in storehouse played a part step-down in the folded ring in outer storehouse was sealed at this moment.The working principle of self-tightening type mechanical sealing is in the outer sleeve:
(1) behind machine startup, working medium pressure P promotes stationary ring and presses to rotating ring, make friction pair contact quiet, rotating ring, friction pair and stationary ring zero shape circle are isolated the high pressure and the normal pressure position of machine, under the situation of rotating shaft rotation, the lubrication groove of friction pair end face forms high-pressure membrane with circle position, footpath in the medium guiding friction pair on the inside and outside round both sides of friction pair, reaches the purpose of sealing;
(2) outer sleeve is interior without any the member to the rigid constraint of stationary ring, stationary ring floats between outer sleeve inner peripheral surface and rotating ring outer circumferential face, along with the height fluctuation of working medium pressure P or beating, tilting of rotating shaft, stationary ring is regulated automatically, and the stationary ring friction pair is adjacent to the rotating ring friction pair all the time;
(3) machine down, working medium pressure P disappears, and under the acting in conjunction of stationary ring zero shape circle and stationary ring spring, this self-tightening type mechanical sealing device still keeps sealing.In fact, this moment, stationary ring zero shape circle was compacted, did not have manpower not restore to the original state, thereby stationary ring was pressed on the rotating ring, and under the not high situation of seal request, even cancellation stationary ring spring, this self-tightening type mechanical sealing device still can proper functioning.
The present invention compared with prior art has following advantage and beneficial effect:
(1) change the structure of traditional mechanical sealing, the effect of reduction even cancellation spring utilizes the effect of working medium and working pressure thereof to reach the effect of sealing, simplify the structure, improve functional reliability, reduced cost, guaranteed the proper functioning under the oil and gas multiphase flow operating mode.
(2) can be used for the operating mode of the multiple liquid medium of big pressure, big flow, big range of viscosities, is a kind of simple, applied widely, and the seal element practical, that effect is good all can use in the conventional equipment of machinery, chemical industry.
Description of drawings
Fig. 1 is the structural representation of combined mechanical sealing device of the present invention;
Fig. 2 is the structural representation of friction pair shown in Figure 1;
Fig. 3 be lubrication groove A shown in Figure 2 to structural representation.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment one
As shown in Figure 1, this combined mechanical sealing device, comprise rotating ring 4, stationary ring 3, folded ring 12, gas-tight silo 2, gas-tight silo 2 comprises inner and outer sleeves 2-2, the 2-3 of end plate 2-1 and both sides thereof, end plate 2-1 be fixed on housing 1 inboard and with rotating shaft 10 sockets, outer sleeve 2-3 and housing 1 socket, inner sleeve 2-2 periphery are threaded and are socketed in gland 13 in the rotating shaft 10; Folded ring 12 is socketed between inner sleeve 2-2 and the rotating shaft 10, and its both sides are close to end plate 2-1 and gland 13 respectively; Rotating ring 4 inner peripheral surfaces and rotating shaft 10 are fixedly sleeved, rotating ring 4 outer ends are provided with shoulder 4-1, the inner peripheral surface socket of shoulder 4-1 outer circumferential face and outer sleeve 2-3, rotating ring 4 exterior edge faces are provided with gland nut 5, the step end face of rotating ring 4 interior edge faces and rotating shaft 10 is close to, and rotating ring 4 inner inner peripheral surfaces are embedded with zero shape circle 11 and amplexiform with rotating shaft 10 sealings; Stationary ring 3 is actively socketed between the outer circumferential face of the inner peripheral surface of outer sleeve 2-3 and rotating ring 4, and outer sleeve 2-3 interior edge face is provided with locating stud 2-4 and stationary ring 3 interlockings, and stationary ring 3 outer circumferential faces are embedded with zero shape circle 8 and amplexiform with the sealing of outer sleeve 2-3 inner peripheral surface; Be embedded with rotating ring, the stationary ring friction pair 6,7 that amplexiforms mutually in rotating ring 4 interior edge faces, stationary ring 3 exterior edge faces both annular groove 4-2, the 3-1 respectively.Be provided with spring 9 between stationary ring 3 exterior edge faces and the outer sleeve 2-3 interior edge face, it is the less flexible integral ring-shaped spring of rigidity, and 9 pairs of stationary rings 3 of spring play the pretension effect.
The end plate 2-1 of gas-tight silo is provided with coolant duct 2-5, and its both ends open is respectively corresponding to the exterior edge face of stationary ring 3, the coolant duct 1-1 outlet of housing 1.
As shown in Figure 2, have a plurality of lubrication grooves 14 on rotating ring, stationary ring friction pair 6,7 end faces, each lubrication groove 14 evenly distributes along circle 15 both sides, middle footpath of friction pair (6 or 7) end face, and each lubrication groove 14 rear ends start from the cylindrical or the interior circle of friction pair (6 or 7) end face, front end tilts to point to the middle footpath circle 15 of friction pair (6 or 7) end face but is no more than middle footpath circle 15, as shown in Figure 3, each lubrication groove 14 rear end groove depth front ends are shallow, and the angle of groove bottom and friction pair (6 or 7) end face is an acute angle; Shown in Fig. 2,3, the front end of each lubrication groove 14 of any friction pair (6 or 7) end face points to consistent with pairing friction pair (7 or 6) direction of relative movement.
This combined mechanical sealing device is work like this: gas-tight silo of the present invention is divided into interior storehouse (inner sleeve 2-2), outer storehouse (outer sleeve 2-3), interior storehouse is a self-tightening type mechanical sealing, outer storehouse is folded ring sealing, the folded ring 12 in outer storehouse () number is provided with according to rated working pressure; In normal operation, whole seal operation are born in the folded ring sealing in outer storehouse, and the self-tightening type mechanical sealing in interior storehouse is load not, does not therefore also need cooling liquid; Work in the machine superpressure, under the situation of perhaps folded ring seal break-off, working medium enters Nei Cang, working medium pressure P promotes stationary ring 3 and presses to rotating ring 4, the coolant system that starts the machine simultaneously provides cooling liquid, self-tightening type mechanical sealing work, the self-tightening type mechanical sealing in storehouse played a part step-down in the folded ring in outer storehouse was sealed at this moment.Self-tightening type mechanical sealing is work like this in the outer sleeve:
(1) behind machine startup, working medium pressure P promotes stationary ring 3 and presses to rotating ring 4, make friction pair 6,7 contacts of dynamic and static ring, friction pair 6,7 and stationary ring zero shape circle 8 are isolated the high pressure and the normal pressure position of machine, under the situation of rotating shaft 10 rotations, the lubrication groove 14 of friction pair 6,7 end faces forms high-pressure membrane with circle 15 positions, footpath in the medium guiding friction pair 6,7 on friction pair 6,7 inside and outside round both sides, reaches the purpose of sealing;
(2) outer sleeve 2-3 is interior without any the member to stationary ring 3 rigid constraints, stationary ring 3 floats between outer sleeve 2-3 inner peripheral surface and rotating ring 4 outer circumferential faces, along with the height fluctuation of working medium pressure P or beating, tilting of rotating shaft 10, stationary ring 3 is regulated automatically, and stationary ring friction pair 7 is adjacent to rotating ring friction pair 6 all the time;
(3) machine down, working medium pressure P disappears, and under the acting in conjunction of stationary ring zero shape circle 8 and stationary ring spring 9, this self-tightening type mechanical sealing device still keeps sealing.In fact, this moment, stationary ring zero shape circle 8 was compacted, did not have manpower not restore to the original state, thereby stationary ring 3 is pressed on the rotating ring 4, under the not high situation of seal request, even cancellation stationary ring spring 9, this self-tightening type mechanical sealing device still can proper functioning.
As mentioned above, just can realize the present invention preferably.
Claims (4)
1. combined mechanical sealing device, it is characterized in that: comprise rotating ring, stationary ring, folded ring, gas-tight silo, gas-tight silo comprises the inner and outer sleeves of end plate and both sides thereof, end plate be fixed on housing inboard and with the rotating shaft socket, outer sleeve and housing socket, inner sleeve periphery are threaded and are socketed in gland in the rotating shaft; Between the inner sleeve and rotating shaft that folded ring set is connected on, its both sides are close to end plate and gland respectively; Rotating ring inner peripheral surface and rotating shaft are fixedly sleeved, the rotating ring outer end is provided with shoulder, the inner peripheral surface socket of shoulder outer circumferential face and outer sleeve, and the rotating ring exterior edge face is provided with gland nut, the step end face of rotating ring interior edge face and rotating shaft is close to, and the inner inner peripheral surface of rotating ring is embedded with O shape circle and amplexiforms with rotating shaft sealing; Stationary ring is actively socketed between the outer circumferential face of the inner peripheral surface of outer sleeve and rotating ring, and the outer sleeve interior edge face is provided with locating stud and stationary ring interlocking, and the stationary ring outer circumferential face is embedded with O shape circle and amplexiforms with the sealing of outer sleeve inner peripheral surface; Be embedded with rotating ring, the stationary ring friction pair that amplexiforms mutually in rotating ring interior edge face, both annular grooves of stationary ring exterior edge face respectively.
2. by the described combined mechanical sealing device of claim 1, it is characterized in that: the end plate of described gas-tight silo is provided with coolant duct, and its both ends open is respectively corresponding to the exterior edge face of stationary ring, the coolant duct outlet of housing.
3. by the described combined mechanical sealing device of claim 1, it is characterized in that: be provided with flexible integral ring-shaped spring between described stationary ring exterior edge face and the outer sleeve interior edge face.
4. by the described combined mechanical sealing device of claim 1, it is characterized in that: have a plurality of lubrication grooves on described rotating ring, the stationary ring friction pair end face, described each lubrication groove evenly distributes along the circle both sides, middle footpath of friction pair end face, and each lubrication groove rear end starts from the cylindrical or the interior circle of friction pair end face, front end tilts to point to the middle footpath circle of friction pair end face but is no more than middle footpath circle, each lubrication groove rear end groove depth front end is shallow, and the angle of groove bottom and friction pair end face is an acute angle; The front end of each lubrication groove of described any friction pair end face points to consistent with pairing friction pair direction of relative movement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100374058A CN100547270C (en) | 2006-08-31 | 2006-08-31 | Combined mechanical sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100374058A CN100547270C (en) | 2006-08-31 | 2006-08-31 | Combined mechanical sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101135377A true CN101135377A (en) | 2008-03-05 |
| CN100547270C CN100547270C (en) | 2009-10-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100374058A Expired - Fee Related CN100547270C (en) | 2006-08-31 | 2006-08-31 | Combined mechanical sealing device |
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| Country | Link |
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| CN (1) | CN100547270C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101994681A (en) * | 2009-08-21 | 2011-03-30 | 笹仓机械工程有限公司 | A shaft sealing structure of a steam compressor in a vacuum concentration device |
-
2006
- 2006-08-31 CN CNB2006100374058A patent/CN100547270C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101994681A (en) * | 2009-08-21 | 2011-03-30 | 笹仓机械工程有限公司 | A shaft sealing structure of a steam compressor in a vacuum concentration device |
| CN101994681B (en) * | 2009-08-21 | 2013-05-01 | 笹仓机械工程有限公司 | A shaft sealing structure of a steam compressor in a vacuum concentration device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100547270C (en) | 2009-10-07 |
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Granted publication date: 20091007 Termination date: 20210831 |
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| CF01 | Termination of patent right due to non-payment of annual fee |