CN202251058U - Oil film double mechanical sealing device for compressors - Google Patents
Oil film double mechanical sealing device for compressors Download PDFInfo
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- CN202251058U CN202251058U CN2011203351514U CN201120335151U CN202251058U CN 202251058 U CN202251058 U CN 202251058U CN 2011203351514 U CN2011203351514 U CN 2011203351514U CN 201120335151 U CN201120335151 U CN 201120335151U CN 202251058 U CN202251058 U CN 202251058U
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Abstract
The utility model relates to an oil film double mechanical seal for compressors, which mainly comprises a pumping screw, a sealing box, a stationary ring, a compaction sleeve, a moving ring, a shaft sleeve, a gland, a transmission ring, an auxiliary seal and the like. The oil film double mechanical seal is characterized in that a surface-to-surface stationary double-end surface structure and non-contact running are adopted for sealing; a fluid moving pressure tank is arranged on the end surface of the sealing moving ring; the pumping screw at a medium side plays a role of throttling and decompressing; the auxiliary seal adopts a 0-shaped ring; and the seal adopts an assembled structure. The oil film double mechanical seal for the compressors has the advantages of being convenient for sealing installation, effectively preventing leakage of sealed oil, preventing process fluids from channeling back into a lubricating oil system to cause lubricating oil pollution, having strong capability of resisting the external disturbance on sealing, realizing zero leakage of sealed media and having a unique self-cleaning function. The oil film double mechanical seal for the compressors is widely suitable for helical-lobe compressors and centrifugal compressors for conveying process fluids in industries of petroleum, chemicals, oil refining and the like.
Description
Technical field
This patent belongs to the seal arrangement of fluid machinery axle head, particularly relates to a kind of compressor and uses the oil film double mechanical seal.
Background technique
At present, industries such as oil, chemical industry, coal oil refining are used for the helical-lobe compressor of delivery technology medium and the shaft end seal of centrifugal compressor often adopts floating-ring seal, contact-type mechanical seal or dry gas seals.Above-mentioned three types of sealings; Though can satisfy the general industry application demand; But narrow limitation is arranged respectively; Seal failure often occurs during particularly for conveying solid substance content height, strong, the easy autohemagglutination of corrosivity, easy coking class medium (like oven gas, torch gas, vinyl benzene dry gas, butadiene air kind medium), working life is short.
The described floating-ring seal of " chemical industry equipment and pipeline " the 42nd volume P48 is a kind of liquid section streaming non-contact sealing, and sealing oil is through very little gap between floating ring and the axle, and is mobile about vertically, limits internal leakage and external leakage respectively.Be applicable to high speed and various pressure rating, the operating mode scope is wide.But the floating-ring seal internal leakage is bigger, and oil gas pressure reduction is very little, and the equipment and the control system of recycling internal leakage oil are complicated, and the investment of auxiliary system is higher than the investment of sealing itself far away.
The contact-type mechanical seal of " mechanical sealing technology and application " (Sinopec publishing house 2010 April the 1st edition) said introduction of P223; Sealing can be born higher pressure; Sealing oil is few to the leakage of gas side; Can prevent that the sealing oil of heads sneaks into operation system, even there is minor amount of oil to bleed, gas-liquid separation is also easy.But for contact-type mechanical seal, the end face linear velocity is high more, and the end face temperature rise is just high more, and fretting wear is serious, and the possibility that oil sealing is leaked is just big more.Oil sealing is leaked and is not only caused sizable material damage, more can influence long period, safety, the smooth running of device.
" fluid machinery " 2003 the 31st volumes described dry gas seals of the 9th phase; Its working principle is through on sealing surface, opening the shallow slot of definite shape; Produce the hydrodynamic effect when making the sealing running, between seal face, form the very thin air film of one deck, thereby make seal operation at contactless state.Because of sealing surface does not contact, so the frictional heat that produces is very little, the seal ring life-span is long, does not need complicated sealing oil system, and cost and maintenance cost are low.But dry gas seals is easy between the solid particle suction seal end face in the separation gas and produce abrasive wear, particularly often occurs sealing early failue during dirtier or easy coking for medium.
Summary of the invention
The purpose of this patent aims to provide a kind of compressor and uses the oil film double end-face mechanical sealing device, mainly is made up of pumping spiral, sealed case, stationary ring, clamping sleeve, rotating ring, axle sleeve, gland, transmission ring and auxiliary seal etc.It is characterized in that: face-to-face state type Double End structure, contactless running are adopted in sealing; Sealing rotating ring end face is offered fluid dynamic pressure groove, and the fluid dynamic pressure groove molded lines can be the curve of helix, circular arc line, straight line and any other form; Side medium pumping spiral plays the throttling hypotensive effect, and spiral can be opened on axle sleeve, also can open on seal chamber, perhaps opens simultaneously on seal chamber and axle sleeve; Auxiliary seal adopts O shape circle; The unit loading type structure is adopted in sealing.
Its advantage is: the sealing integral installation is convenient; Good seal performance; What can solve effectively that existing technology exists is prone to take place abrasive wear, can not in time clears up problems such as plug for seal end face fluid dynamic pressure groove, sealing poor stability, working life be short because of autopolymer produces as pump into solid particle because of seal face, and effectively stops processing medium anti-channeling entering lubricating oil system to cause lubricant pollution.Side medium seal face contactless running during the sealing proper functioning owing to the spiral chute dynamic pressure effect; The outside diameter spiral chute is realized film lubrication with clean oil sealing suction seal end face; And in time clean out the autopolymer that forms under end face particle or the specific condition; Avoid it to accumulate in seal face and stop up the dynamic pressure groove, have unique " self-cleaning function "; The internal side diameter spiral chute returns the oil sealing reverse pumping to outside diameter, and the realization oil sealing does not have leakage.Atmospheric side sealing pumping spiral chute mainly stops the high pressure sealing oil leakage to bearing oil system, and sealing oil is carried out pressurize, can realize that the equipment long period does not have the running of leakage.Since the contactless running of seal face, no end face fretting wear, the end face temperature rise is low, and energy consumption is little, and sealing and good stability are so this sealing reliability is good and the maintenance and repair expense reduces relatively.
Description of drawings
Fig. 1 is this patent embodiment one a structural representation.
Fig. 2 is a dynamic and static ring structural representation in this patent embodiment one the structure.
Fig. 3 is a rotating ring side medium end face fluid dynamic pressure groove grooved schematic representation in this patent embodiment one the structure.
Fig. 4 is a rotating ring atmospheric side end face fluid dynamic pressure groove grooved schematic representation in this patent embodiment one the structure.
Fig. 5 is this patent embodiment one a structure medium side pumping spiral rectangle grooved schematic representation
Among the figure: 1 pumping spiral, 2. sealed case, 3 threadeds, 4 stationary rings, 5,12 screws, 6 limited rings, 7,8,11,14 auxiliary O shapes circles, 9 rotating rings, 10 stop pins, 13 axle sleeves, 15 glands, 16 collection loads, 17 transmission rings
Embodiment
This patent carries the double-screw compressor shaft end seal as shown in Figure 1 as the styrene device dry gas.It is as shown in Figure 3 that side medium stationary ring and rotating ring counterface are offered the fluid dynamic pressure groove grooved, and it is as shown in Figure 4 that atmospheric side stationary ring and rotating ring counterface are offered the fluid dynamic pressure groove grooved.Its working principle is following, and the side medium seal face is offered fluid dynamic pressure groove and realized contactless running, and wherein the external diameter side channel will have the oil sealing suction seal end face of certain pressure; Increase along with oil sealing flow in the groove; Pressure increases, and between seal face, forms the fluid film with certain rigidity and in time separates two sealing surfaces, avoids end face frictional wear; Realize film lubrication, seal chamber is returned in the oil sealing reverse pumping that will get into seal face simultaneously.Inside and outside footpath groove guarantees that totally oil sealing do not leak, and stops processing medium to get into seal chamber and scurry into lubricating oil tank, thereby pollutes sealing oil system.Realize under the leak free prerequisite at the pumping groove simultaneously; The downstream pumping groove pumps into seal face to the clean oil sealing of trace; Form micro circulation with oil film face; The autopolymer that in time forms end face particle or specific condition down cleans out, and avoids it to accumulate in seal face and stops up the dynamic pressure groove, has unique " self-cleaning function ".It mainly is to stop the high pressure sealing oil leakage to bearing oil system that the pumping spiral chute is offered in the atmospheric side sealing, and sealing oil is carried out pressurize, realizes that the equipment long period does not have the running of leakage.This novel contactless oil film seal is in industry extensive uses such as oil, chemical industry, metallurgy, oil refining, and working life was above 2 years.
Claims (3)
1. a compressor is used the oil film double end-face mechanical sealing device; Mainly form by pumping spiral, sealed case, stationary ring, clamping sleeve, rotating ring, axle sleeve, gland, transmission ring and auxiliary seal etc.; It is characterized in that: face-to-face state type Double End structure, contactless running are adopted in sealing; Sealing rotating ring end face is offered fluid dynamic pressure groove; Side medium pumping spiral plays the throttling hypotensive effect, and auxiliary seal adopts O shape circle; The unit loading type structure is adopted in sealing.
2. compressor according to claim 1 is used the oil film double end-face mechanical sealing device, it is characterized in that: described fluid dynamic pressure groove molded lines can be the curve of helix, circular arc line, straight line and any other form.
3. compressor according to claim 1 is used the oil film double end-face mechanical sealing device, it is characterized in that: described spiral can be opened on axle sleeve, also can open on seal chamber, perhaps opens simultaneously on seal chamber and axle sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203351514U CN202251058U (en) | 2011-09-08 | 2011-09-08 | Oil film double mechanical sealing device for compressors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203351514U CN202251058U (en) | 2011-09-08 | 2011-09-08 | Oil film double mechanical sealing device for compressors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202251058U true CN202251058U (en) | 2012-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203351514U Expired - Lifetime CN202251058U (en) | 2011-09-08 | 2011-09-08 | Oil film double mechanical sealing device for compressors |
Country Status (1)
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| CN (1) | CN202251058U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821942A (en) * | 2013-07-03 | 2014-05-28 | 东营海森密封技术有限责任公司 | Double mechanical sealing method and double mechanical sealing device for kettle gas films |
| CN103821943A (en) * | 2013-07-03 | 2014-05-28 | 东营海森密封技术有限责任公司 | Non-contact mechanical sealing method and non-contact mechanical sealing device for high-temperature and high-viscosity medium pump |
| CN104343468A (en) * | 2013-07-31 | 2015-02-11 | 三星泰科威株式会社 | A vane assembly and a vane apparatus comprising the vane assembly |
| CN104454628A (en) * | 2014-12-10 | 2015-03-25 | 襄阳五二五泵业有限公司 | Seal pressure-relief device for pump in coal chemical industry |
| CN112145472A (en) * | 2020-09-28 | 2020-12-29 | 荏原机械淄博有限公司 | Two-stage combined sealing device suitable for submersible axial-flow pump under severe working conditions |
-
2011
- 2011-09-08 CN CN2011203351514U patent/CN202251058U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821942A (en) * | 2013-07-03 | 2014-05-28 | 东营海森密封技术有限责任公司 | Double mechanical sealing method and double mechanical sealing device for kettle gas films |
| CN103821943A (en) * | 2013-07-03 | 2014-05-28 | 东营海森密封技术有限责任公司 | Non-contact mechanical sealing method and non-contact mechanical sealing device for high-temperature and high-viscosity medium pump |
| CN104343468A (en) * | 2013-07-31 | 2015-02-11 | 三星泰科威株式会社 | A vane assembly and a vane apparatus comprising the vane assembly |
| CN104343468B (en) * | 2013-07-31 | 2017-09-19 | 韩华泰科株式会社 | Blade assembly and the blade apparatus including the blade assembly |
| CN104454628A (en) * | 2014-12-10 | 2015-03-25 | 襄阳五二五泵业有限公司 | Seal pressure-relief device for pump in coal chemical industry |
| CN112145472A (en) * | 2020-09-28 | 2020-12-29 | 荏原机械淄博有限公司 | Two-stage combined sealing device suitable for submersible axial-flow pump under severe working conditions |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120530 |
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| CX01 | Expiry of patent term |