CN201771834U - Sealing structure of turbopump assembly - Google Patents
Sealing structure of turbopump assembly Download PDFInfo
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- CN201771834U CN201771834U CN2010202522126U CN201020252212U CN201771834U CN 201771834 U CN201771834 U CN 201771834U CN 2010202522126 U CN2010202522126 U CN 2010202522126U CN 201020252212 U CN201020252212 U CN 201020252212U CN 201771834 U CN201771834 U CN 201771834U
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Abstract
The utility model relates to a sealing structure of a turbopump assembly, which comprises a first medium pump inlet sealing component arranged at a first medium pump inlet, a first medium pump outlet end disengaging sealing component arranged at a first medium pump outlet and a second medium pump inlet sealing component arranged at a second medium pump inlet. The sealing structure solves the technical problem that the conventional sealing structure of the turbopump assembly cannot resist the impact of a high-temperature gas, cannot resist low temperature and has short service life, betters a seal effect and ensures safety in use.
Description
Technical field
The utility model belongs to the mechanical sealing technology field, more particularly, the utility model belongs to turbine pump high-speed rotating machine field of sealing technology, the utility model also can be used for aviation rotation axis seal and chemical industry equipment device, and there is high-temperature fuel gas the centre, and media of both sides must be guaranteed in the discontiguous whirligig.
Background technique
A kind of pump drive assembly comprises three turbine pumps of three coaxial lines, middle is that high-temperature fuel gas pump, both sides are the inflammable liquid pump, i.e. first medium pump and second medium pump, this layout has proposed great difficulty to the sealing configuration of pump drive assembly, and three cover black box temperature difference are all greater than more than 600 ℃.But existing black box can not satisfy high temperature resistant combustion gas impact, low temperature resistant, to get well with media compatibility and can adapt to long lifetime, the needs of starting repeatedly.
Summary of the invention
The utility model purpose provides a kind of sealing configuration of pump drive assembly, its sealing configuration that has solved existing pump drive assembly can not satisfy high-temperature fuel gas impact, can not be low temperature resistant, technical problem that the life-span is short.
Technical solution of the present utility model is:
A kind of sealing configuration of pump drive assembly, comprise the first medium pump inlet seal assembly 1 that is arranged on first medium pump inlet, be arranged on first medium pump outlet end coming away type black box 3 of first medium pump outlet and the second medium pump inlet seal assembly 2 that is arranged on second medium pump inlet, its special way is:
The described first medium pump inlet seal assembly 1 comprises bellows-type end face seal and the two floating-ring seals of circumference; Described bellows-type end face seal comprises first axle sleeve 11 and first rotating ring 14 that are arranged on first 10, is arranged on first static components on first housing 12, described first static components comprises the corrugated metal pipe components 130 that is arranged on first housing 12, first stationary seat 131 that is connected with corrugated metal pipe components 130 and is arranged on first stationary ring 132 on first stationary seat 131, described first rotating ring 14 and first stationary ring, 132 rubbing contact, described first housing 12 are provided with the spacing snap ring 16 that can limit 131 motions of first stationary seat and position; Described spacing snap ring 16 comprises fixed plate 161 and is arranged on the projection 162 of sensing first stationary ring 15 on the fixed plate 161; The two floating-ring seals of described circumference comprise the unsteady ring seat 190 that is arranged on first housing 12, two first floating rings 191 that are arranged on both sides in the ring seat 190 of floating; Described first floating ring 191 contacts with first axle sleeve 11;
The described first medium pump outlet end coming away type black box 3 comprises coming away type end face seal and labyrinth seal; Described coming away type end face seal comprises the 3rd rotating ring 32 that is arranged on the 3rd 30, be arranged on the 3rd spring seat 331 on the 3rd housing 31, be arranged on a plurality of the 3rd springs 38 in the 3rd spring seat 331, by three stationary seat 33 and three stationary ring 36, described three stationary ring 36 and three rotating ring 32 rubbing contact of the 3rd spring 38 tops to the 3rd rotating ring 32; Described labyrinth seal is to be arranged on the labyrinth structure 35 on the circle in the 3rd stationary seat 33;
The described second medium pump inlet seal assembly 2 comprises the spring end face seal, obturage circle sealing and circumference floating-ring seal; The described circle sealing of obturaging comprises the circle housing 280 and be arranged on the circle 281 obturaged in the circle housing 280 of obturaging obturaged that is arranged on second housing 22.
The above-mentioned first medium pump inlet seal assembly 1 also comprises the inert gas intake line 192 that is opened between float ring seat 190 and two second floating ring 191 inner side surfaces, communicates with two floating ring 191 outer side surfaces and is opened on first housing 12 inert gas outfall 193 outward.
The above-mentioned first medium pump outlet end coming away type black box 3 also comprises apical ring 332 and the U type leather cup 39 that is arranged between the 3rd spring seat 331 and the 3rd stationary seat 33, and described apical ring 332 and the 3rd spring seat 331 are connected.
The above-mentioned first medium pump outlet end coming away type black box 3 also comprises the metal V-shaped ring 37 that is arranged between the 3rd rotating ring 32 and the 3rd 30.
Above-mentioned labyrinth structure 35 is flat profile of tooth labyrinth structure.
Above-mentioned spring end face seal comprises second axle sleeve 21 that is arranged on second 20, be arranged on second moving ring assembly 24 on second axle sleeve 21, be arranged on second spring seat 23 on second housing 22, be arranged on a plurality of second springs 27 in second spring seat 23, withstood on second static components 25 on second moving ring assembly 24, described second static components 25 and second moving ring assembly, 24 rubbing contact by second spring 27; Described circumference floating-ring seal comprises second floating ring 29 that is arranged on the other end in the circle housing 280 of obturaging; Described second floating ring 29 contacts with second axle sleeve 21.
The above-mentioned described second medium pump inlet seal assembly 2 also comprise be arranged on the spring end face seal and the circle sealing of obturaging between blow-by tube 222 and be arranged on the blow-by tube 221 of obturaging between circle sealing and the circumference floating-ring seal.
The above-mentioned circle 281 of obturaging is for being with the circle of obturaging of skeleton, and its quantity is two, described two circle 281 back-to-back settings of obturaging.
The advantage that the utility model had:
1, the second medium pump inlet seal assembly of the present utility model adopts the coil assembly sealing of obturaging, and the circle of obturaging can both guarantee that the high-temperature fuel gas and the inflammable liquid that leak do not meet in pre-cold-peace operation process, improve sealing effect.
2, the first medium pump inlet seal assembly of the present utility model is provided with spacing snap ring on housing, and the motion of restriction stationary seat also remains on stationary seat within the range of safety operation all the time, has guaranteed safe in utilization.
3, the first medium pump outlet end coming away type black box of the present utility model has increased the mode of labyrinth seal, and labyrinth seal directly designs on the stationary seat of coming away type sealing, has improved sealing effect.
Description of drawings
Fig. 1 is the total arrangement schematic representation of the utility model pump drive assembly sealing;
Fig. 2 is the second medium pump inlet seal modular construction schematic representation of the present utility model;
Fig. 3 is the first medium pump inlet seal modular construction schematic representation of the present utility model;
Fig. 4 is the first medium pump outlet end coming away type seal component architecture schematic representation of the present utility model.
Embodiment
As shown in Figure 1, a kind of sealing configuration of pump drive assembly, comprise the first medium pump inlet seal assembly 1 that is arranged on first medium pump inlet, the first medium pump outlet end coming away type black box 3 that is arranged on the outlet of first medium pump, and the second medium pump inlet seal assembly 2 that is arranged on second medium pump inlet.
Figure 2 shows that the second medium pump inlet seal assembly.The second medium pump inlet seal assembly 2 comprises the spring end face seal, obturage circle sealing and circumference floating-ring seal.
The spring end face seal comprises second axle sleeve 21 that is arranged on second 20, be arranged on second moving ring assembly 24 on second axle sleeve 21, be arranged on second spring seat 23 on second housing 22, be arranged on a plurality of second springs 27 in second spring seat 23, withstood on second static components, 25, the second static components 25 and second moving ring assembly, 24 rubbing contact on second moving ring assembly 24 by second spring 27; Second axle sleeve 21 withstands second moving ring assembly 24.
The circle sealing of obturaging comprises the circle housing 280 and be arranged on the circle 281 obturaged in the circle housing 280 of obturaging obturaged that is arranged on second housing 22; Obturage circle 281 for being with the circle of obturaging of skeleton, and its quantity is two, two circle 281 back-to-back settings of obturaging.
The circumference floating-ring seal comprises second floating ring 29 that is arranged on the other end in the circle housing 280 of obturaging; Second floating ring 29 contacts with second axle sleeve 21.In order to improve sealing effect, the second medium pump inlet seal assembly 2 also comprise be arranged on the spring end face seal and obturage between the circle sealing blow-by tube 222 and be arranged on the blow-by tube 221 of obturaging between circle sealing and the circumference floating-ring seal.
Figure 3 shows that the first medium pump inlet seal assembly.The first medium pump inlet seal assembly 1 comprises bellows-type end face seal and the two floating-ring seals of circumference.
The bellows-type end face seal comprises first axle sleeve 11 and first rotating ring 14 that are arranged on first 10, is arranged on first static components on first housing 12, and first axle sleeve 11 withstands first rotating ring 14; First static components comprises the corrugated metal pipe components 130 that is arranged on first housing 12, first stationary seat 131 that is connected with corrugated metal pipe components 130 and is arranged on first stationary ring 132 on first stationary seat 131, first rotating ring 14 and first stationary ring, 132 rubbing contact, first housing 12 are provided with the spacing snap ring 16 that can limit 131 motions of first stationary seat and position; Spacing snap ring 16 comprises fixed plate 161 and is arranged on the projection 162 of sensing first stationary ring 132 on the fixed plate 161.
The two floating-ring seals of circumference comprise the unsteady ring seat 190 that is arranged on first housing 12, two first floating rings 191 that are arranged on both sides in the ring seat 190 of floating; First floating ring 191 contacts with first axle sleeve 11.
In order to improve sealing effect, the first medium pump inlet seal assembly 1 also can comprise the inert gas intake line 192 that is opened between float ring seat 190 and two second floating ring 191 inner side surfaces, communicates with two floating ring 191 outer side surfaces and be opened on first housing 12 inert gas outfall 193 outward.
Figure 4 shows that the first medium pump outlet end coming away type black box.The first medium pump outlet end coming away type black box 3 comprises coming away type end face seal and labyrinth seal.
The coming away type end face seal comprises the 3rd rotating ring 32 that is arranged on the 3rd 30, be arranged on the 3rd spring seat 331 on the 3rd housing 31, be arranged on a plurality of the 3rd springs 38 in the 3rd spring seat 331, by three stationary seat 33 and three stationary ring 36, described three stationary ring 36 and three rotating ring 32 rubbing contact of the 3rd spring 38 tops to the 3rd rotating ring 32.
Labyrinth seal is to be arranged on the labyrinth structure 35 on the circle in the 3rd stationary seat 33; Labyrinth structure 35 specifically can adopt flat profile of tooth labyrinth structure.
In order to improve sealing effect, the first medium pump outlet end coming away type black box 3 also can comprise apical ring 332 and the U type leather cup 39 that is arranged between the 3rd spring seat 331 and the 3rd stationary seat 33, and is arranged on the metal V-shaped ring 37 between the 3rd rotating ring 32 and the 3rd 30.Apical ring 332 and the 3rd spring seat 331 are connected.
Working principle of the present utility model:
The second medium pump inlet seal assembly adopts two circles of obturaging to seal the medium and the rich, high temperature combustion combustion gas of leaking from end face seal respectively, and the circle of obturaging guarantees that in pre-cold-peace operation process the cryogenic media that leaks into the starting chamber does not meet with the second medium pump chamber, and this bad working environment circle that requires to obturage should take into full account the wearing and tearing of Sealing and reuse requirement in structural design.Therefore, the obturage structure of circle adopts the circle of obturaging of band skeleton.Through the test of many times checking, the circle of obturaging is not having that wear resistance is preferably arranged under the situation of pressure, dry friction 25min under the linear velocity of 55m/s, and the gas inspection is not still leaked.If turn round under the situation of pressurization 0.3MPa, leak greatly after 14 seconds, do not pressurize running repeatedly, accumulate after 35 minutes the inspection of 0.3MPa gas and do not leak, the side side of pressurizeing or not, then pressurization obturage that circle lost efficacy and not the circle of obturaging of pressure side still keep sealing, if the combustion gas major part is released from blow-by tube after this explanation process outer circumference floating-ring seal, the pressure that intermediate seal bears is very little, even lost efficacy because of pressure-bearing by the circle of obturaging of floating ring side, obturages to enclose with its back-to-back leather cup and also can not lose efficacy.
High-temperature fuel gas does not enter in a large number (if high-temperature fuel gas enters in a large number when not leaking with cartridge start when guaranteeing static filling medium, can cause sealing cavity temperature raises, rubber o-ring can very fast ageing failure like this), the circumference floating-ring seal is adopted in the outer side sealing of the second medium pump inlet seal assembly, it is to limit leakage rate by close clearance between radially active floating ring and the axle, it is noncontact seal, though leakage rate is many than mechanical seal, but simple in structure, sealing surface contacts hardly, therefore, life-span and reliability are than higher, select wear-resisting lubricated graphite material, allow during rotation and contacting to a certain degree spool arranged, reduce high-temperature fuel gas as far as possible and scurry into.
The first medium pump inlet seal assembly comprises one end face seal and twice floating-ring seal, and the first road end face seal is designed to the end face seal of fixing interior dress balanced type metal bellows, i.e. bellows-type end face seal.In the entire work process, end face is in sealing state, and sealing is reliable, can repeatedly start, and medium leaks few more well more, and end face should be in serviceable condition, and loading coefficient K must be greater than liquid film counter-force coefficient for this reason, and seal pressure total on the end face is less.The inertia of carrying out 0.5MPa (absolute pressure) in the middle of two circumference floating rings is blown down, and high-temperature fuel gas enters in first medium pump in the time of can effectively stoping cartridge start.Small leakage is released from separately outfall 193 and 194 respectively, plays the isolation to two media, and high-temperature fuel gas does not enter second medium pump when guaranteeing to start.
The first medium pump outlet end coming away type black box 3 comprises that the end face seal of spring coming away type combines with the perfect of labyrinth seal: labyrinth seal directly designs on the static components of spring end face seal, divide a plurality of flat teeth of processing and a plurality of groove and control gap at the stationary seat inner circular part, form flat profile of tooth labyrinth seal thus with axle.Such design need not increase axial length fully, has made full use of the stationary ring of spring end face seal and the space of between centers.
The end face seal of spring coming away type can belong to and is dress, static, balanced type end face seal in the spring.A plurality of the 3rd springs 38 produce big seal pressure under static state, the tightness after guaranteeing to assemble and the sealing of starting period, the hydraulic load COEFFICIENT K is less than liquid film counter-force coefficient lambda on the end face, thereby increase with fluid pressure that the liquid effects specific pressure reduces on the end face, end face separates when seal pressure total on the end face equals 0, in case end face begins to separate, then leakage rate will increase significantly, at this moment the pressure of pushing open that medium forms on sealing surface will be well beyond the increase of spring force, and therefore very fast end face just is in full-gear.
The first medium pump outlet end coming away type black box, 3 auxiliary seals adopt metalwork, because a side is a cryogenic media, a side is a high-temperature fuel gas, and both sides pressure reduction reaches 20MPa, and want and can be free to slide under the effect at spring force when work, general rubber parts or plastics can't meet the demands.This auxiliary seal adopts V-arrangement metal ring and U type metal leather cup.
Claims (8)
1. the sealing configuration of a pump drive assembly, comprise the first medium pump inlet seal assembly (1) that is arranged on first medium pump inlet, be arranged on first medium pump outlet end coming away type black box (3) of first medium pump outlet and the second medium pump inlet seal assembly (2) that is arranged on second medium pump inlet, it is characterized in that:
The described first medium pump inlet seal assembly (1) comprises bellows-type end face seal and the two floating-ring seals of circumference; Described bellows-type end face seal comprises first axle sleeve (11) and first rotating ring (14) that is arranged on first (10), be arranged on first static components on first housing (12), described first static components comprises the corrugated metal pipe components (130) that is arranged on first housing (12), first stationary seat (131) that is connected with corrugated metal pipe components (130) and be arranged on first stationary ring (132) on first stationary seat (131), described first rotating ring (14) and first stationary ring (132) rubbing contact, described first housing (12) are provided with the spacing snap ring (16) that can limit first stationary seat (131) motion and position; Described spacing snap ring (16) comprises fixed plate (161) and is arranged on the projection (162) of sensing first stationary ring (15) on the fixed plate (161); The two floating-ring seals of described circumference comprise the unsteady ring seat 190 that is arranged on first housing 12, two first floating rings (191) that are arranged on the interior both sides of unsteady ring seat (190); Described first floating ring (191) contacts with first axle sleeve (11);
The described first medium pump outlet end coming away type black box (3) comprises coming away type end face seal and labyrinth seal; Described coming away type end face seal comprises the 3rd rotating ring (32) that is arranged on the 3rd (30), be arranged on the 3rd spring seat (331) on the 3rd housing (31), be arranged on a plurality of the 3rd springs (38) in the 3rd spring seat (331), by the 3rd spring (38) top to the 3rd stationary seat (33) of the 3rd rotating ring (32) and the 3rd stationary ring (36), described the 3rd stationary ring (36) and the 3rd rotating ring (32) rubbing contact; Described labyrinth seal is to be arranged on the labyrinth structure (35) on the circle in the 3rd stationary seat 33;
The described second medium pump inlet seal assembly (2) comprises the spring end face seal, obturage circle sealing and circumference floating-ring seal; The described circle sealing of obturaging comprises that being arranged on obturaging on second housing (22) encloses housing (280) and be arranged on the interior circle 281 of obturaging of the circle housing (280) of obturaging.
2. the sealing configuration of pump drive assembly according to claim 1 is characterized in that: the described first medium pump inlet seal assembly (1) also comprises the inert gas intake line (192) that is opened between unsteady ring seat (190) and two second floating rings (191) inner side surface, communicates with two floating rings (191) outer side surface and is opened on the outer inert gas outfall (193) of first housing (12).
3. the sealing configuration of pump drive assembly according to claim 1 and 2, it is characterized in that: the described first medium pump outlet end coming away type black box (3) also comprises apical ring (332) and the U type leather cup (39) that is arranged between the 3rd spring seat (331) and the 3rd stationary seat (33), and described apical ring (332) is connected with the 3rd spring seat (331).
4. the sealing configuration of pump drive assembly according to claim 3, it is characterized in that: the described first medium pump outlet end coming away type black box (3) also comprises the metal V-shaped ring (37) that is arranged between the 3rd rotating ring (32) and the 3rd (30).
5. the sealing configuration of pump drive assembly according to claim 4, it is characterized in that: described labyrinth structure (35) is flat profile of tooth labyrinth structure.
6. the sealing configuration of pump drive assembly according to claim 3, it is characterized in that: described spring end face seal comprises second axle sleeve (21) that is arranged on second (20), be arranged on second moving ring assembly (24) on second axle sleeve (21), be arranged on second spring seat (23) on second housing (22), be arranged on a plurality of second springs (27) in second spring seat (23), withstood on second static components (25) on second moving ring assembly (24), described second static components (25) and second moving ring assembly (24) rubbing contact by second spring (27); Described circumference floating-ring seal comprises second floating ring (29) that is arranged on the interior the other end of circle housing (280) of obturaging; Described second floating ring (29) contacts with second axle sleeve (21).
7. the sealing configuration of pump drive assembly according to claim 6 is characterized in that: the described second medium pump inlet seal assembly (2) also comprise be arranged on the spring end face seal and obturage between the circle sealing blow-by tube (222) and be arranged on the blow-by tube (221) of obturaging between circle sealing and the circumference floating-ring seal.
8. the sealing configuration of pump drive assembly according to claim 7 is characterized in that: the described circle (281) of obturaging is the circle of obturaging of band skeleton, and its quantity is two, described two back-to-back settings of circle (281) of obturaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202522126U CN201771834U (en) | 2010-07-08 | 2010-07-08 | Sealing structure of turbopump assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202522126U CN201771834U (en) | 2010-07-08 | 2010-07-08 | Sealing structure of turbopump assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201771834U true CN201771834U (en) | 2011-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202522126U Expired - Fee Related CN201771834U (en) | 2010-07-08 | 2010-07-08 | Sealing structure of turbopump assembly |
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| Country | Link |
|---|---|
| CN (1) | CN201771834U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422863B (en) * | 2015-12-10 | 2017-09-08 | 西安航天动力研究所 | A kind of liquid oxygen pump sealer with assembled |
| CN107448611A (en) * | 2017-09-27 | 2017-12-08 | 孟金来 | The labyrinth gland in adjustable sealing gap |
| CN110762215A (en) * | 2019-11-10 | 2020-02-07 | 大连康维科技有限公司 | Shaft seal mechanism and method for preventing dew condensation of shaft seal part thereof |
| CN111140401A (en) * | 2019-12-18 | 2020-05-12 | 西安航天动力研究所 | Spherical turbine shell for liquid rocket engine and turbopump |
| CN112012954A (en) * | 2020-09-08 | 2020-12-01 | 北京星际荣耀空间科技有限公司 | Turbo pump sealing mechanism and turbo pump |
-
2010
- 2010-07-08 CN CN2010202522126U patent/CN201771834U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422863B (en) * | 2015-12-10 | 2017-09-08 | 西安航天动力研究所 | A kind of liquid oxygen pump sealer with assembled |
| CN107448611A (en) * | 2017-09-27 | 2017-12-08 | 孟金来 | The labyrinth gland in adjustable sealing gap |
| CN107448611B (en) * | 2017-09-27 | 2024-05-24 | 孟金来 | Labyrinth sealing device with adjustable sealing gap |
| CN110762215A (en) * | 2019-11-10 | 2020-02-07 | 大连康维科技有限公司 | Shaft seal mechanism and method for preventing dew condensation of shaft seal part thereof |
| CN110762215B (en) * | 2019-11-10 | 2021-08-10 | 大连康维科技有限公司 | Shaft seal mechanism and method for preventing dew condensation of shaft seal part thereof |
| CN111140401A (en) * | 2019-12-18 | 2020-05-12 | 西安航天动力研究所 | Spherical turbine shell for liquid rocket engine and turbopump |
| CN112012954A (en) * | 2020-09-08 | 2020-12-01 | 北京星际荣耀空间科技有限公司 | Turbo pump sealing mechanism and turbo pump |
| CN112012954B (en) * | 2020-09-08 | 2022-04-12 | 北京星际荣耀空间科技股份有限公司 | Turbo pump sealing mechanism and turbo pump |
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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: 20110323 Termination date: 20180708 |