CN201771838U - Sealing structure of turbine pump - Google Patents

Sealing structure of turbine pump Download PDF

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Publication number
CN201771838U
CN201771838U CN2010202522450U CN201020252245U CN201771838U CN 201771838 U CN201771838 U CN 201771838U CN 2010202522450 U CN2010202522450 U CN 2010202522450U CN 201020252245 U CN201020252245 U CN 201020252245U CN 201771838 U CN201771838 U CN 201771838U
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CN
China
Prior art keywords
ring
floating
sealing
gas
seal
Prior art date
Application number
CN2010202522450U
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Chinese (zh)
Inventor
赵伟刚
郝飞
王少鹏
Original Assignee
中国航天科技集团公司第六研究院第十一研究所
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Priority to CN2010202522450U priority Critical patent/CN201771838U/en
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Publication of CN201771838U publication Critical patent/CN201771838U/en

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Abstract

The utility model relates to a sealing structure of a turbine pump, comprising a liquid lubricating machine sealing structure, a carbon and graphite floating ring sealing structure and a spiral groove dry gas sealing structure, wherein the liquid lubricating machine sealing structure is arranged at a turbine pump outlet and is used for sealing inflammable liquid medium; the carbon and graphite floating ring sealing structure is arranged at a high-temperature gas side; and the spiral groove dry gas sealing structure is arranged between the liquid lubricating machine sealing structure and the carbon and graphite floating ring sealing structure. The sealing structure provides a sealing structure which can isolate mutual leakage between inflammable liquid and high-temperature gas and can adapt to high-temperature and high-pressure working environment.

Description

A kind of turbine pump sealing configuration
Technical field
The utility model relates to a kind of turbine pump sealing configuration.
Background technique
Development along with machinery, the environment of the High Temperature High Pressure that sealing faces is more and more, at present, in motor and assembly parts thereof, adopt following seal style: labyrinth seal, brush seal, cup packing, contact-type end face seal, floating-ring seal, radially contact seal, contactless end face seal, but every kind of seal style has its shortcoming, can solve and relevant problems such as engine reliability growth, economic performance raising as contactless end face seal.But noncontact seal also has its imperfection, the for example calculating of face pressure, the balanced design of opening force and closing force, the Design and Machining of end face grooved etc., also there are certain shortcoming and error, so that can not fine application and extensive use, this sealing configuration pattern complexity, the professional knowledge that needs research and grasp design, make and use.
In the turbine pump of carrying inflammable liquid, input end adopts high-temperature fuel gas, mutual leakage when inflammable liquid and high-temperature fuel gas, easily cause danger such as combustion explosion, therefore need provide a kind of sealing configuration, the mutual leakage between inflammable liquid and the high-temperature fuel gas can be isolated, and the working environment of High Temperature High Pressure can be adapted to.
The model utility content
The utility model purpose provides a kind of turbine pump sealing configuration, and it can isolate the mutual leakage between inflammable liquid and the high-temperature fuel gas, to be applicable to high temperature and high pressure environment.
Technical solution of the present utility model is:
A kind of turbine pump sealing configuration, its special way is: comprise the liquid lubrication mechanical seal structure that is arranged on the turbine pump outlet port and is used to seal the inflammable liquid medium, be arranged on the carbon graphite floating-ring seal structure of high-temperature fuel gas side and be arranged on the liquid lubrication mechanical seal structure and carbon graphite floating-ring seal structure between the spiral chute dry gas sealing structure;
Described liquid lubrication mechanical seal structure comprises static components 10, be fastened on moving ring assembly 11 on the axle 13, be arranged on the spring housing 9 on the pump case 14 and be arranged on spring 8 in the spring housing 9, described static components 10 is connected with spring housing 9 by spring 8, described static components 10 and moving ring assembly 11 rubbing contact;
Described carbon graphite floating-ring seal structure comprise the floating ring seat 2 that is arranged on the pump case 14 and floating ring lid 3 and be arranged on floating ring seat 2 and floating ring lid 3 between floating ring 1; When moving, described floating ring 1 contacts with floating ring seat 2;
Described spiral chute dry gas sealing structure comprises dry gas seals rotating ring 5, the stationary ring 6 that is fastened on the axle 13, be arranged on the stationary ring spring housing 19 on the pump case 14 and be arranged on stationary ring spring 7 in the stationary ring spring housing 19, described stationary ring 6 is connected with stationary ring spring housing 19 by stationary ring spring 7, and described stationary ring 6 contacts with dry gas seals rotating ring 5;
The working surface of described dry gas seals rotating ring 5 is processed with a plurality of spiral linear grooves 18 with the rotation direction circumference uniform distribution; Be provided with between described spring housing 9 and the stationary ring spring housing 19 be used to drain gas release hole 12, described hole 12 1 end openings that release are in atmosphere, the other end is opened on and releases chamber 16 between liquid lubrication mechanical seal structure and the spiral chute dry gas sealing structure;
Described turbine pump sealing configuration also comprises a gas barrier device, described gas barrier device comprises the separation gas source and is arranged on separation gas passage 15 on the pump case 14, described separation gas passage 15 1 ends connect the separation gas source, and the other end connects the grooved ring cavity 17 between spiral chute dry gas sealing structure and carbon graphite floating-ring seal structure.
The quantity of above-mentioned spiral linear groove is 6-20.
Floating ring seat 2 in the above-mentioned carbon graphite floating-ring seal structure and floating ring lid 3 are by locking nut 4 compression fit.
Above-mentioned spring housing 9 and stationary ring spring housing 19 are integral structure.
Above-mentioned separation gas source is an inert gas.
Above-mentioned separation gas source is nitrogen or helium.
Technique effect of the present utility model is:
1, the utility model turbine pump sealing configuration is taked the setting of the combination arrangement of three kinds of sealings, the setting of releasing the hole and gas barrier device, prevent that effectively high-temperature fuel gas from scurrying into Seal cage, and in the middle of dry gas seals and carbon graphite floating ring, introduced a kind of separation gas source that is higher than high-temperature fuel gas pressure, select inert gas for use, exempted the inconsistent possibility of gas medium and surrounding medium,, high temperature and high pressure environment seals good seal performance thereby being converted into normal temperature high voltage.
2, the utility model spiral chute dry gas seals can guarantee not leak under the static conditions, and gas is effectively isolated, and has controlled air consumption.Friction has been avoided in the end face non-contact at work of spiral chute dry gas seals, and reusable, the life-span is long.
3, the related friction pair of the utility model adopts firmly hard friction is made up, thereby avoids starting the friction of stopping, and overcomes the sealing distortion under the high temperature condition, raising performance, life-saving.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is a spiral chute dry gas seals rotating ring schematic surface of the present utility model.
Fig. 3 is a spiral chute dry gas seals rotating ring working condition schematic representation of the present utility model.
Wherein: 1-floating ring, 2-floating ring seat, 3-floating ring lid, 4-locking nut, 5-dry gas seals rotating ring, 6-stationary ring, 7-stationary ring spring, 8-spring, 9-spring housing, 19-stationary ring spring housing, 10-static components, 11-moving ring assembly, 12-releases the hole, 13-axle, 14-pump case, 15-separation gas passage, 16-releases the chamber, 17-grooved ring cavity, 18-spiral linear groove, 20-seals the weir, and 21-seals the dam.
Embodiment
As shown in Figure 1, a kind of turbine pump sealing configuration, comprise the liquid lubrication mechanical seal structure that is arranged on the turbine pump outlet port and is used to seal normal temperature inflammable liquid medium, be arranged on the carbon graphite floating-ring seal structure of high-temperature fuel gas side and be arranged on the liquid lubrication mechanical seal structure and carbon graphite floating-ring seal structure between the spiral chute dry gas sealing structure; Wherein the liquid lubrication mechanical seal structure comprises and is fastened on moving ring assembly 11, the static components 10 of axle on 13, is arranged on pump case 14 upper spring housings 9 and is arranged on spring 8 in the spring housing 9, static components 10 is connected with spring housing 9 by spring 8, static components 10 and moving ring assembly 11 rubbing contact; Carbon graphite floating-ring seal structure comprise the floating ring seat 2 that is arranged on the pump case 14 and floating ring lid 3 and be arranged at floating ring seat 2 and floating ring lid 3 between floating ring 1, floating ring 1 adopts the carbon graphite floating ring, guarantees before and after the sealing under the pressure reduction prerequisite, and gas is isolated and sealed.Contact with floating ring seat 2 during floating ring 1 action, form the interstitial fluid film between floating ring 1 and the axle; Floating ring seat 2 and floating ring lid 3 are by locking nut 4 compression fit.
The spiral chute dry gas sealing structure comprises the dry gas seals rotating ring 5, the stationary ring 6 that are fastened on the axle, be arranged on the stationary ring spring housing 19 on the pump case and be arranged on stationary ring spring 7 in the stationary ring spring housing 19, stationary ring 6 is connected with stationary ring spring housing 19 by stationary ring spring 7, and stationary ring 6 contacts with dry gas seals rotating ring 5; The working surface of dry gas seals rotating ring 5 is processed with 6-20 spiral linear groove with the rotation direction circumference uniform distribution, and the working surface of dry gas seals rotating ring 5 is the surface of contact of dry gas seals rotating ring 5 and stationary ring 6.
Spring housing 9 and stationary ring spring housing 19 are one, be provided with between spring housing 9 and the stationary ring spring housing be used to drain gas release hole 12, release hole 12 1 end openings in atmosphere, the other end is opened on and releases chamber 16 between liquid lubrication mechanical seal structure and the spiral chute dry gas sealing structure;
The turbine pump sealing configuration also comprises a gas barrier device, the gas barrier device comprises the separation gas source and is arranged on separation gas passage 15 on the pump case 14, separation gas passage one end is connected in the separation gas source, and the other end is connected in the grooved ring cavity 17 between spiral chute dry gas sealing structure and the carbon graphite floating-ring seal structure; The separation gas source is an inert gas, is generally nitrogen or helium etc.
Sealing configuration takes carbon graphite floating ring and spiral chute dry gas seals and liquid lubrication mechanical seal to scurry into Seal cage in order to prevent high-temperature fuel gas, introduced a kind of separation gas that is higher than high-temperature fuel gas pressure in the grooved ring cavity in the middle of dry gas seals and carbon graphite floating ring, also be called barrier gas, select nitrogen or helium inert gas for use, exempted the inconsistent possibility of gas medium and surrounding medium.Seal thereby high temperature and high pressure environment is converted into normal temperature high voltage,, so only need to solve the high pressure sealing problem so dry gas seals mainly faces high pressure.
But separation gas provides the environment of good operation on the one hand the spiral chute dry gas seals, form relatively low pressure reduction with gas pressure on the other hand, direction is towards gas side, form effective seal and propagation of pressure by carbon graphite floating ring assembly in the middle of separation gas and the gas, and stoped gas to scurry spiral chute dry gas seals side and common liq lubricating mechanical sealing side.In the middle of spiral chute dry gas seals and common liq lubricating mechanical sealing Design and Machining release the chamber and release the hole, have a spot of isolation gas and dielectric leakage to discharge atmosphere by releasing the hole.Sealing effective separation that gas is formed like this, the isolation gas that the spiral chute dry gas seals can sealed high pressure on the other hand, the effective sealing medium of common liq lubricating mechanical sealing simultaneously.The combination of three kinds of sealings can be finished the sealing of high pressure-temperature.
As shown in Figure 2, the working surface of dry gas seals rotating ring 5 is processed with 6-20 spiral linear groove with the rotation direction circumference uniform distribution, this spiral linear groove is under the effect by the pressure of isolating gas, running simultaneously, end face forms non-contact, and form stable hydrodynamic film, this thickness is about 0.002mm, and there is certain rigidity, in the working procedure, the fluid film of on the one hand certain rigidity makes the end face non-contact, and another side stops gas to external leakage, can have good sealing runnability under the pressurized gas state.Because hydrodynamic effect seal face reaches non-contact running, leak for a short time after the engine operation, avoided being in contact with one another of two media, satisfy highly reliable, reusable requirement
Be illustrated in figure 3 as the residing environment schematic representation of spiral chute dry gas seals rotating ring, the rotating ring outside is a separation gas, and internal side diameter is a sealing gas, this environment is an atmosphere, and spiral linear groove 18 is carved with on the rotating ring surface, also the start indent, the groove district also is called sealing weir 20, and non-groove district is sealing dam 21.The sealing dam belongs to normally off when black box is static, seal leakage when preventing static pre-filling.When seal operation, separation gas is circumferentially sucked, and increases gradually along spiral chute district gas pressure, reaches maximum to tip location pressure, and sealing surface by certain rigidity fluid film separately forms and stablizes steady running behind the air film.
The stationary ring of dry gas seals adopts whole processing pattern, and once-through has compactness, reduces the trouble that in the past sealed two kinds of material combinations.And carry out friction pair with the rotating ring scored surface and match, be exactly under this sealing, guarantee that the spiral chute dry gas seals has formed stable running.

Claims (6)

1. turbine pump sealing configuration is characterized in that: comprise the liquid lubrication mechanical seal structure that is arranged on the turbine pump outlet port and is used to seal the inflammable liquid medium, be arranged on the carbon graphite floating-ring seal structure of high-temperature fuel gas side and be arranged on the liquid lubrication mechanical seal structure and carbon graphite floating-ring seal structure between the spiral chute dry gas sealing structure;
Described liquid lubrication mechanical seal structure comprises static components (10), be fastened on moving ring assembly (11) on the axle (13), be arranged on the spring housing (9) on the pump case (14) and be arranged on spring (8) in the spring housing (9), described static components (10) is connected with spring housing (9) by spring (8), described static components (10) and moving ring assembly (11) rubbing contact;
Described carbon graphite floating-ring seal structure comprises the floating ring seat (2) that is arranged on the pump case (14) and floating ring lid (3) and is arranged on floating ring seat (2) and floating ring covers floating ring (1) between (3); Contact with floating ring seat (2) during described floating ring (1) action;
Described spiral chute dry gas sealing structure comprises dry gas seals rotating ring (5), the stationary ring (6) that is fastened on the axle (13), be arranged on the stationary ring spring housing (19) on the pump case (14) and be arranged on the interior stationary ring spring (7) of stationary ring spring housing (19), described stationary ring (6) is connected with stationary ring spring housing (19) by stationary ring spring (7), and described stationary ring (6) contacts with dry gas seals rotating ring (5);
The working surface of described dry gas seals rotating ring (5) is processed with a plurality of spiral linear grooves (18) with the rotation direction circumference uniform distribution; Be provided with between described spring housing (9) and the stationary ring spring housing (19) be used to drain gas release hole (12), described hole (12) one end openings that release are in atmosphere, and the other end is opened on and releases chamber (16) between liquid lubrication mechanical seal structure and the spiral chute dry gas sealing structure;
Described turbine pump sealing configuration also comprises a gas barrier device, described gas barrier device comprises the separation gas source and is arranged on separation gas passage (15) on the pump case (14), described separation gas passage (15) one ends connect the separation gas source, and the other end connects the grooved ring cavity (17) between spiral chute dry gas sealing structure and carbon graphite floating-ring seal structure.
2. turbine pump sealing configuration according to claim 1 is characterized in that: the quantity of described spiral linear groove is 6-20.
3. turbine pump sealing configuration according to claim 1 and 2 is characterized in that: floating ring seat (2) in the described carbon graphite floating-ring seal structure and floating ring lid (3) are by locking nut (4) compression fit.
4. turbine pump sealing configuration according to claim 3 is characterized in that: described spring housing (9) and stationary ring spring housing (19) are integral structure.
5. turbine pump sealing configuration according to claim 4 is characterized in that: described separation gas source is an inert gas.
6. turbine pump sealing configuration according to claim 5 is characterized in that: described separation gas source is nitrogen or helium.
CN2010202522450U 2010-07-08 2010-07-08 Sealing structure of turbine pump CN201771838U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010202522450U CN201771838U (en) 2010-07-08 2010-07-08 Sealing structure of turbine pump

Publications (1)

Publication Number Publication Date
CN201771838U true CN201771838U (en) 2011-03-23

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103758581A (en) * 2014-02-19 2014-04-30 山东青能动力股份有限公司 High speed turbine gland seal system for power circulation of organic working medium
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
CN105114353A (en) * 2015-08-21 2015-12-02 北京航天动力研究所 Rayleigh groove type floating ring sealing device for hydrogen oxygen engine turbopump
CN105351244A (en) * 2015-11-24 2016-02-24 青海盐湖工业股份有限公司 Serial type dry gas sealing device, application of serial type dry gas sealing device to light dydrocarbon pump and application method of serial type dry gas sealing device on light dydrocarbon pump
CN109737094A (en) * 2018-11-13 2019-05-10 陕西蓝箭航天技术有限公司 Dynamic sealing device and gas-turbine-pump combination for turbine pump
CN110821879A (en) * 2019-09-30 2020-02-21 北京航天动力研究所 Helium flame-retardant sealing structure of turbopump of liquid rocket engine

Cited By (8)

* Cited by examiner, † Cited by third party
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
CN103758581A (en) * 2014-02-19 2014-04-30 山东青能动力股份有限公司 High speed turbine gland seal system for power circulation of organic working medium
CN103758581B (en) * 2014-02-19 2015-03-25 山东青能动力股份有限公司 High speed turbine gland seal system for power circulation of organic working medium
CN105114353A (en) * 2015-08-21 2015-12-02 北京航天动力研究所 Rayleigh groove type floating ring sealing device for hydrogen oxygen engine turbopump
CN105351244A (en) * 2015-11-24 2016-02-24 青海盐湖工业股份有限公司 Serial type dry gas sealing device, application of serial type dry gas sealing device to light dydrocarbon pump and application method of serial type dry gas sealing device on light dydrocarbon pump
CN109737094A (en) * 2018-11-13 2019-05-10 陕西蓝箭航天技术有限公司 Dynamic sealing device and gas-turbine-pump combination for turbine pump
CN109737094B (en) * 2018-11-13 2020-05-12 陕西蓝箭航天技术有限公司 Dynamic sealing device for turbine pump and turbine pump set
CN110821879A (en) * 2019-09-30 2020-02-21 北京航天动力研究所 Helium flame-retardant sealing structure of turbopump of liquid rocket engine

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CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20110323

Termination date: 20180708