CN202220727U - Pump gas-film double-surface mechanical seal device - Google Patents
Pump gas-film double-surface mechanical seal device Download PDFInfo
- Publication number
- CN202220727U CN202220727U CN2011203728614U CN201120372861U CN202220727U CN 202220727 U CN202220727 U CN 202220727U CN 2011203728614 U CN2011203728614 U CN 2011203728614U CN 201120372861 U CN201120372861 U CN 201120372861U CN 202220727 U CN202220727 U CN 202220727U
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- film double
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- pump gas
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Abstract
The utility model relates to a novel pump gas-film double-surface mechanical seal which mainly comprises a main seal and an auxiliary seal. The novel pump gas-film double-surface mechanical seal is characterized in that the main seal and the auxiliary seal are arranged back to back, and two seal friction pairs operate in a non-contacted way; the surfaces of a rotating seal ring 2 and a rotating seal ring 14 adopt inside diameter slotting; isolation gas with relative high pressure is filled between the main seal and the auxiliary seal; a spring 8 is positioned at the side of a stationary ring so as not to be impacted by centrifugal force and process fluid; after the main seal becomes invalid, the auxiliary seal plays a main seal role in a short period so as to prevent the fluid from leaking to atmosphere; and the mechanical seal is of a container type structure. The novel pump gas-film double-surface mechanical seal has the advantages of low power consumption, long service life and good ability to prevent solid particles, the auxiliary system has a simple structure and can ensure that the process fluid is not polluted, and the whole installation is correct and convenient. The device is suitable for occasions which do not allow harmful pumping materials to leak.
Description
Technical field
The invention belongs to the seal arrangement of fluid machinery axle head, particularly relate to a kind of pump and use the air film double end-face mechanical sealing device.
Background technique
Oil, chemical industry are used to carry rotor pump sealing poisonous, harmful, inflammable, explosive, high type of medium of corrosivity generally to adopt contact-type mechanical seal; In use sealing life is short; Seal failure often occurs and cause dielectric leakage, cause material damage, environmental pollution.
Fig. 9-18 is depicted as the double mechanical seal of band thermal siphon system among the P198 of " mechanical seal practical technique and application " (Sinopec publishing house 2010 April the 1st edition), between two groups of sealings, forms Seal cage, and the injection white oil is as sealing liquid in the chamber in.Often occur medium in actual use and leak, pollution lubricating oil, the secondary sealing operation of influence through primary seal; Cause secondary seal failure; Sealing liquid leaks, fluid infusion is frequent, then cause when serious medium through secondary seal leakage to atmospheric side, reliability, Security property are poor.
The present invention is intended to solve the problems referred to above that existing pump exists, and improves sealing reliability and Security, reduces enterprise's maintenance maintenance cost.
Summary of the invention
The object of the invention aims to provide a kind of new pump and uses double mechanical seal, mainly comprises primary seal and secondary sealing two-part.It is characterized in that: major and minor sealing is arranged back-to-back, all contactless running of two cover sealing friction pair; Sealing rotating ring 2,14 end faces adopt the internal diameter fluting; Feed the separation gas of relatively high pressure between major and minor sealing; Spring 8 is positioned at the influence that the stationary ring side is avoided centrifugal force and processing medium; After primary seal lost efficacy, play the primary seal effect in the secondary sealing short time, prevent that medium from leaking to atmospheric side.
The grooved line of said sealing rotating ring 2,14 end face internal diameters fluting is helix, circular arc line or straight line; Described seal arrangement adopts the unit loading type structure.
Major advantage of the present invention is: low in energy consumption, the long service life of seal friction, have good anti-solid particle ability, and auxiliary system is simple in structure and can guarantee that processing medium is not contaminated, and integral installation is accurate, convenient.
Description of drawings
Fig. 1 is the structure and the system schematic of known technology seal arrangement;
Fig. 2 is the structural representation of the embodiment of the invention one;
Fig. 3 is the structure medium side rotating ring end face flute profile schematic representation of the embodiment of the invention one;
Fig. 4 is an atmospheric side rotating ring end face flute profile schematic representation in the structure of the embodiment of the invention one;
1, the O of axle sleeve place shape circle 2, side medium rotating ring 3, snap ring 4, axle sleeve 5, side medium stationary ring 6, the O of stationary ring place shape circle 7, throw-out collar 8, spring 9, sealing gasket 10, throw-out collar 11, atmospheric side stationary ring 12, gland 13, the O of rotating ring place shape circle 14, side medium rotating ring 15, sealed case.
Embodiment
Embodiment one: the present invention is as shown in Figure 2 as chemical plant tetrachloromethane tower circulating pump sealing device; It is as shown in Figure 3 that side medium rotating ring and stationary ring counterface are offered the fluid dynamic pressure groove grooved; It is as shown in Figure 4 that atmospheric side rotating ring and stationary ring counterface are offered the fluid dynamic pressure groove grooved, charges into clean barrier gas in the middle cavity, generally adopts industrial nitrogen; Its pressure is higher than about Seal cage pressure medium 0.2-0.3MPa, and filter precision is 1 μ m.Barrier gas makes seal inner diameter place pressurized; Gas gets into the hydrodynamic spiral chute that both sides sealing rotating ring end face internal diameter place is offered; The dynamic and static pressure effect of the liquid that under rotation status, is produced makes both ends of the surface separated by a stable thin air film and is in the non-contact running state, has guaranteed that the zero leakage of processing medium is overflowed with zero; Under design of hydrodynamic spiral flute type and action of centrifugal force, can prevent effectively that the solid particle in the processing medium from getting into sealing surface.The nitrogen amount that control simultaneously gets into pump chamber is very little, and through the micro-nitrogen entering environment of atmospheric side seal leakage, this part gas is pure nitrogen gas, does not contain any sealed medium, meets requirement on environmental protection fully.Auxiliary system adopts Plan74 among the API 682, need not to add storage tank, and simple to operation, easy care can effectively be controlled cost.
Claims (3)
1. a pump is used the air film double end-face mechanical sealing device, mainly comprises primary seal and secondary sealing two-part, it is characterized in that: major and minor sealing is arranged back-to-back, all contactless running of two cover sealing friction pair; Sealing rotating ring (2), (14) end face adopt the internal diameter fluting; Feed the separation gas of relatively high pressure between major and minor sealing; Spring (8) is positioned at the influence that the stationary ring side is avoided centrifugal force and processing medium.
2. pump according to claim 1 is used the air film double end-face mechanical sealing device, it is characterized in that: the grooved line of said sealing rotating ring (2), (14) end face internal diameter fluting is helix, circular arc line or straight line.
3. pump according to claim 1 is used the air film double end-face mechanical sealing device, it is characterized in that: described seal arrangement adopts the unit loading type structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203728614U CN202220727U (en) | 2011-09-29 | 2011-09-29 | Pump gas-film double-surface mechanical seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203728614U CN202220727U (en) | 2011-09-29 | 2011-09-29 | Pump gas-film double-surface mechanical seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202220727U true CN202220727U (en) | 2012-05-16 |
Family
ID=46042754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203728614U Expired - Lifetime CN202220727U (en) | 2011-09-29 | 2011-09-29 | Pump gas-film double-surface mechanical seal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202220727U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN110005817A (en) * | 2019-03-15 | 2019-07-12 | 中广核工程有限公司 | A kind of containment heat derives mechanical seal for pump and auxiliary system devices |
| CN112145427A (en) * | 2020-09-08 | 2020-12-29 | 洛普兰机械设备(宁波)有限公司 | Integrated mechanical seal for process screw compressor |
-
2011
- 2011-09-29 CN CN2011203728614U patent/CN202220727U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN110005817A (en) * | 2019-03-15 | 2019-07-12 | 中广核工程有限公司 | A kind of containment heat derives mechanical seal for pump and auxiliary system devices |
| CN112145427A (en) * | 2020-09-08 | 2020-12-29 | 洛普兰机械设备(宁波)有限公司 | Integrated mechanical seal for process screw compressor |
| CN112145427B (en) * | 2020-09-08 | 2022-07-19 | 洛普兰机械设备(宁波)有限公司 | Packaging type mechanical seal for process screw compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120516 |
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| CX01 | Expiry of patent term |