CN106089692A - A kind of cryogenic liquid pump self-lubricating contact device and method - Google Patents
A kind of cryogenic liquid pump self-lubricating contact device and method Download PDFInfo
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- CN106089692A CN106089692A CN201610507895.7A CN201610507895A CN106089692A CN 106089692 A CN106089692 A CN 106089692A CN 201610507895 A CN201610507895 A CN 201610507895A CN 106089692 A CN106089692 A CN 106089692A
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- China
- Prior art keywords
- dynamic pressure
- groove
- pressure groove
- pressure dynamic
- low pressure
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/18—Lubricating
Abstract
The present invention relates to a kind of cryogenic liquid pump self-lubricating contact device and method.Its technical scheme is: gland is connected with stationary ring by push pedal, the right side of described stationary ring contacts cooperation with rotating ring, and the end face that described rotating ring coordinates with stationary ring is provided with annular cell body, in annular groove body, portion is provided with multiple drainage channel, it is respectively provided on two sides with recessed high pressure dynamic pressure groove and low pressure dynamic pressure groove at annular cell body, and annular cell body connects with recessed high pressure dynamic pressure groove, low pressure dynamic pressure groove；Provide the benefit that: the present invention is by offering drainage channel at rotating ring, directly sealed medium is introduced contact end face, for from drainage way, under hydrostatic pressure effect with the guide functions of annular cell body, make to contact end face be in full liquid-film lubrication state, greatly reduce the frictional heat that end face produces；Additionally use v-shaped structure or the high pressure dynamic pressure groove of spiral structure and low pressure dynamic pressure groove, further ensure that No leakage, improve the stability of power set.
Description
Technical field
The present invention relates to a kind of self-lubricating contact device and method, particularly to a kind of cryogenic liquid pump self-lubricating contact dress
Put and method.
Background technology
Mechanical seal is a kind of for solving the device of movable sealing between rotary shaft and body, in some special dimension,
Such as liquid-propellant rocket engine, uses cryogenic liquid pump, and typically requirement is: seal simple and reliable for structure, and it is auxiliary to need not peripheral hardware
Auxiliary system.For the cryopump in liquid-propellant rocket engine, when pre-cold filling, it is desirable to sealing leak amount is zero；Sending out
During motivation work, seal rear end and only allow to leak a small amount of gas oxygen；Require that sealing has and repeatedly start ability to work.Cryopump machine
Tool seal be cryopump can long-term safety run key.But for common mechanical seal, due to sealing ring end
In contact condition, the fricative frictional heat of sealing ring can make the temperature of seal face rise above facing of low temperature liquid medium
Boundary's temperature, makes the medium generation vaporization phenomenon on seal face, damages sealing ring, so that seal failure.And when close
During envelope leakage, the medium rapid vaporization that spills also absorbs heat, and causes the temperature at sealing to reduce, and can cause because of non-uniform temperature
Sealing ring deformation, so that sealing a large amount of leakage.Peripheral hardware cools down the above-mentioned sealing problem that can solve of aid system, but auxiliary is
That unites arranges the reliability that can reduce dynamic power machine, does not meets the general of the mechanical seal design of cryopump in special industry and wants
Ask.
Summary of the invention
The purpose of the present invention is aiming at the drawbacks described above that prior art exists, it is provided that a kind of cryogenic liquid pump self-lubricating connects
Touching device and method, the temperature rise that can solve aforesaid liquid contact end face is too high, and liquid medium vaporization causes asking of seal failure
Topic.
A kind of cryogenic liquid pump self-lubricating that the present invention mentions contact device, including gland (1), spring (2), push pedal (3),
Stationary ring (6), rotating ring (8), axle sleeve (13), the side of gland (1) is provided with groove, by spring (2) and push pedal (3) with static
Ring (6) connects, and the right side of described stationary ring (6) contacts cooperation with rotating ring (8), and described rotating ring (8) is joined with stationary ring (6)
The end face closed is provided with annular cell body (7), is provided with multiple drainage channel (9), at annular cell body in annular cell body (7) inside
(7) be respectively provided on two sides with recessed high pressure dynamic pressure groove (16) and low pressure dynamic pressure groove (17), and annular cell body (7) is with recessed
High pressure dynamic pressure groove (16), low pressure dynamic pressure groove (17) connect, and liquid medium can pass through drainage channel (9) and be filled into annular cell body
(7), the lubrication channel that high pressure dynamic pressure groove (16) is formed with low pressure dynamic pressure groove (17) realizes self-lubricating and contact cooperation；Described high pressure
The outside of dynamic pressure groove (16) and low pressure dynamic pressure groove (17) is seal convexity (15), at the opposite side end face of described rotating ring (8)
Being connected to axle sleeve (13) by external drainage groove (12), axle sleeve (13) is provided with external drainage passage (12), and liquid medium is by drawing outward
Circulation road (12) enters the drainage channel (9) of rotating ring (8).
Above-mentioned high pressure dynamic pressure groove (16) and low pressure dynamic pressure groove (17) use v-shaped structure or spiral structure.
The quantity ratio of above-mentioned high pressure dynamic pressure groove (16) and low pressure dynamic pressure groove (17) is for N: 1, wherein N >=1, low pressure dynamic pressure groove
Quantity is between 12 ~ 24.
The quantity of above-mentioned drainage channel (9) is between 12 ~ 24.
First spring energy-storage sealing ring (4), described rotating ring (8) and axle are installed between above-mentioned stationary ring (6) and gland (1)
The second spring energy-storage sealing ring (14) is installed between set (13).
The using method of the cryogenic liquid pump self-lubricating contact device that the present invention mentions, is characterized in that comprising the following steps:
First, when normally working, by offering drainage channel at rotating ring, it is achieved sealing device from drain, eliminate auxiliary
Rinse-system, directly introduces the contact end face of rotating ring, at hydrostatic pressure effect and circle by drainage channel by sealed medium
Make seal face be in full liquid-film lubrication state under the guide functions of annular trough body, reduce the frictional heat that contact end face produces；
Secondly, sealing medium is under viscous shear effect, when will be leaked by high side to low side, due at rotating ring end face
Offer high pressure dynamic pressure groove and low pressure dynamic pressure groove, and annular cell body, high pressure dynamic pressure groove form, with low pressure dynamic pressure groove, the groove connected,
It is easy to the flowing of reverse pumping medium；It addition, be provided with seal convexity outside high pressure dynamic pressure groove and low pressure dynamic pressure groove, improve dynamic pressure effect
Should；Sealing medium, in dropping process, flows to low pressure dynamic pressure groove by high pressure dynamic pressure groove, then reinfuses to high pressure dynamic pressure groove, eliminates
Leakage under differential pressure action, thus realize the No leakage sealed.
Above-mentioned high pressure dynamic pressure groove and low pressure dynamic pressure groove are respectively adopted v-shaped structure or spiral structure.
The invention has the beneficial effects as follows: sealed medium, by offering drainage channel at rotating ring, is directly drawn by the present invention
Enter to contact end face, for from drainage way, making to contact end face under hydrostatic pressure effect with the guide functions of annular cell body and be in
Full liquid-film lubrication state, greatly reduces the frictional heat that end face produces, it is ensured that temperature rise, in the range of technological requirement, eliminates end
The vaporization phenomenon of face cryogen, meets the cryopump requirement to sealing property；By offering hydrodynamic at rotating ring end face
Groove, under viscous shear effect, goes back to by the liquid reversing leaked by high side to low side to high-pressure side, thus realizes without letting out
Leakage.Compared with prior art, static pressure bearing capacity that Hydrostatic die mould seals and Hydrodynamic pressure type has fully been used to seal
Fluid conveying effect, it is achieved that seal noncontact and run and from drainage wash, reduce End Face Temperature Rise, simple in construction, eliminate auxiliary
The rinse-system helped, it is ensured that the reliability of sealing；Additionally use v-shaped structure or the high pressure dynamic pressure groove of spiral structure and low
Press indent, further ensure that No leakage, improve the stability of power set.
Accompanying drawing explanation
Accompanying drawing 1 is the sectional view of the present invention；
Accompanying drawing 2 is the sectional view of rotating ring；
Accompanying drawing 3 is the sectional view of axle sleeve；
Accompanying drawing 4 is the side view of the first embodiment of rotating ring；
Accompanying drawing 5 is the side view of the second embodiment of rotating ring；
Accompanying drawing 6 is the side view of the third embodiment of rotating ring；
In upper figure: gland 1, spring 2, push pedal the 3, first spring energy-storage sealing ring the 4, the 3rd spring energy-storage sealing ring 5, stationary ring 6,
Annular cell body 7, rotating ring 8, drainage channel the 9, the 4th spring energy-storage sealing ring 10, cylindrical annular trough body 11, external drainage groove 12,
Axle sleeve the 13, second spring energy-storage sealing ring 14, seal convexity 15, high pressure dynamic pressure groove 16 and low pressure dynamic pressure groove 17.
Detailed description of the invention
Embodiment 1, referring to the drawings 1-4, the invention will be further described:
A kind of cryogenic liquid pump self-lubricating contact device that the present invention mentions, including gland 1, spring 2, push pedal 3, stationary ring 6, rotation
Change 8, axle sleeve 13, the side of gland 1 is provided with groove, is connected with stationary ring 6 by spring 2 and push pedal 3, by push pedal 3, makes quiet
Stop ring 6 has nose balance ability, and the right side of described stationary ring 6 contacts cooperation with rotating ring 8, and described rotating ring 8 is with static
The end face that ring 6 coordinates is provided with annular cell body 7, is provided with multiple drainage channel 9, at annular cell body 7 inside annular cell body 7
Be respectively provided on two sides with recessed high pressure dynamic pressure groove 16 and low pressure dynamic pressure groove 17, and annular cell body 7 and recessed high pressure dynamic pressure
Groove 16, low pressure dynamic pressure groove 17 connect, and liquid medium can be filled into annular cell body 7, high pressure dynamic pressure groove 16 by drainage channel 9
The lubrication channel formed with low pressure dynamic pressure groove 17 realizes self-lubricating and contacts cooperation；Described high pressure dynamic pressure groove 16 and low pressure dynamic pressure groove
The outside of 17 is seal convexity 15, and the opposite side end face at described rotating ring 8 is connected to axle sleeve 13, axle by external drainage groove 12
Set 13 is provided with external drainage passage 12, and liquid medium enters the drainage channel 9 of rotating ring 8 by external drainage passage 12.
Wherein, high pressure dynamic pressure groove 16 and low pressure dynamic pressure groove 17 all use v-shaped structure, referring in particular to accompanying drawing 4, at sticky shearing
Reinfusing to the liquid medium leaked to sealing low pressure side from drainage channel under the effect of power seal cavity, v-shaped structure can make
Liquid flow-disturbing reverse pumping, and low pressure dynamic pressure groove assume responsibility for main liquid reverse pumping function, it is achieved sealed the No leakage of liquid medium.
The quantity ratio of above-mentioned high pressure dynamic pressure groove 16 and low pressure dynamic pressure groove 17 is for N: 1, wherein N >=1, low pressure dynamic pressure groove quantity
At 12；The quantity of above-mentioned drainage channel 9 is 12；First spring energy-storage is installed between above-mentioned stationary ring 6 and gland 1 seal
Circle 4, installs the second spring energy-storage sealing ring 14, it is achieved the static sealing under worst cold case between described rotating ring 8 and axle sleeve 13.
The using method of the cryogenic liquid pump self-lubricating contact device that the present invention mentions, is characterized in that comprising the following steps:
First, when normally working, by offering drainage channel at rotating ring, it is achieved sealing device from drain, eliminate auxiliary
Rinse-system, directly introduces the contact end face of rotating ring, at hydrostatic pressure effect and circle by drainage channel by sealed medium
Make seal face be in full liquid-film lubrication state under the guide functions of annular trough body, reduce the frictional heat that contact end face produces；
Secondly, sealing medium is under viscous shear effect, when will be leaked by high side to low side, due at rotating ring end face
Offer high pressure dynamic pressure groove and low pressure dynamic pressure groove, and annular cell body, high pressure dynamic pressure groove form, with low pressure dynamic pressure groove, the groove connected,
It is easy to the flowing of reverse pumping medium；It addition, be provided with seal convexity outside high pressure dynamic pressure groove and low pressure dynamic pressure groove, improve dynamic pressure effect
Should；Sealing medium, in dropping process, flows to low pressure dynamic pressure groove by high pressure dynamic pressure groove, then reinfuses to high pressure dynamic pressure groove, eliminates
Leakage under differential pressure action, thus realize the No leakage sealed.
Embodiment 2, difference from Example 1 is, low pressure dynamic pressure groove quantity is at 24；The number of above-mentioned drainage channel 9
Amount is 24；It addition, referring to the drawings 5, described high pressure dynamic pressure groove 16 and low pressure dynamic pressure groove 17 all use spiral structure, specifically join
According to accompanying drawing 5, reinfuse to the liquid medium leaked to sealing low pressure side from drainage channel seal under the effect of viscous shear
Cavity, spiral structure can make liquid flowing more smooth and easy, and low pressure dynamic pressure groove assume responsibility for main liquid reverse pumping function, real
Now sealed the No leakage of liquid medium.
Embodiment 3, difference from Example 1 is, low pressure dynamic pressure groove quantity is at 16；The number of above-mentioned drainage channel 9
Amount is 20；It addition, referring to the drawings 5, described high pressure dynamic pressure groove 16 uses spiral structure, low pressure dynamic pressure groove 17 to use V-arrangement to tie
Structure, centre is annular cell body, referring in particular to accompanying drawing 6, will be from drainage channel to sealing low pressure under the effect of viscous shear
The liquid medium of side leakage reinfuses to seal cavity, and on high-tension side spiral structure can make liquid flowing more smooth and easy, and low
Press indent and then make its flow-disturbing reverse pumping by v-shaped structure, it is also possible to preferably eliminate the leakage under differential pressure action, it is achieved sealed
The No leakage of liquid medium.
The above, be only the part preferred embodiment of the present invention, and any those of ordinary skill in the art all may profit
Revised or be revised as the technical scheme of equivalent by the technical scheme of above-mentioned elaboration.Therefore, according to the technology of the present invention
Any simple modification that scheme is carried out or substitute equivalents, belong to the greatest extent the scope of protection of present invention.
Claims (9)
1. a cryogenic liquid pump self-lubricating contact device, is characterized in that: include gland (1), spring (2), push pedal (3), static
Ring (6), rotating ring (8), axle sleeve (13), the side of gland (1) is provided with groove, by spring (2) and push pedal (3) and stationary ring
(6) connecting, the right side of described stationary ring (6) contacts cooperation with rotating ring (8), and described rotating ring (8) coordinates with stationary ring (6)
End face be provided with annular cell body (7), be provided with multiple drainage channel (9), at annular cell body annular cell body (7) is internal
(7) be respectively provided on two sides with recessed high pressure dynamic pressure groove (16) and low pressure dynamic pressure groove (17), and annular cell body (7) is with recessed
High pressure dynamic pressure groove (16), low pressure dynamic pressure groove (17) connect, and liquid medium can pass through drainage channel (9) and be filled into annular cell body
(7), the lubrication channel that high pressure dynamic pressure groove (16) is formed with low pressure dynamic pressure groove (17) realizes self-lubricating and contact cooperation；Described high pressure
The outside of dynamic pressure groove (16) and low pressure dynamic pressure groove (17) is seal convexity (15), at the opposite side end face of described rotating ring (8)
Being connected to axle sleeve (13) by external drainage groove (12), axle sleeve (13) is provided with external drainage passage (12), and liquid medium is by drawing outward
Circulation road (12) enters the drainage channel (9) of rotating ring (8).
Cryogenic liquid pump self-lubricating the most according to claim 1 contact device, is characterized in that: described high pressure dynamic pressure groove
(16) and low pressure dynamic pressure groove (17) use v-shaped structure.
Cryogenic liquid pump self-lubricating the most according to claim 1 contact device, is characterized in that: described high pressure dynamic pressure groove
(16) and low pressure dynamic pressure groove (17) use spiral structure.
Cryogenic liquid pump self-lubricating the most according to claim 1 contact device, is characterized in that: described high pressure dynamic pressure groove
(16) using spiral structure, low pressure dynamic pressure groove (17) uses v-shaped structure.
Cryogenic liquid pump self-lubricating the most according to claim 1 contact device, is characterized in that: described high pressure dynamic pressure groove
(16) with the quantity ratio of low pressure dynamic pressure groove (17) for N: 1, wherein N >=1, low pressure dynamic pressure groove quantity is between 12 ~ 24.
Cryogenic liquid pump self-lubricating the most according to claim 1 contact device, is characterized in that: described drainage channel (9)
Quantity be between 12 ~ 24.
Cryogenic liquid pump self-lubricating the most according to claim 1 contact device, it is characterized in that: described stationary ring (6) and
First spring energy-storage sealing ring (4) is installed between gland (1), installs the second spring between described rotating ring (8) and axle sleeve (13) and store
Can sealing ring (14).
8. a using method for the cryogenic liquid pump self-lubricating contact device as according to any one of claim 1-7, it is special
Levy is to comprise the following steps:
First, when normally working, by offering drainage channel at rotating ring, it is achieved sealing device from drain, eliminate auxiliary
Rinse-system, directly introduces the contact end face of rotating ring, at hydrostatic pressure effect and circle by drainage channel by sealed medium
Make seal face be in full liquid-film lubrication state under the guide functions of annular trough body, reduce the frictional heat that contact end face produces；
Secondly, sealing medium is under viscous shear effect, when will be leaked by high side to low side, due at rotating ring end face
Offer high pressure dynamic pressure groove and low pressure dynamic pressure groove, and annular cell body, high pressure dynamic pressure groove form, with low pressure dynamic pressure groove, the groove connected,
It is easy to the flowing of reverse pumping medium；It addition, be provided with seal convexity outside high pressure dynamic pressure groove and low pressure dynamic pressure groove, improve dynamic pressure effect
Should；Sealing medium, in dropping process, flows to low pressure dynamic pressure groove by high pressure dynamic pressure groove, then reinfuses to high pressure dynamic pressure groove, eliminates
Leakage under differential pressure action, thus realize the No leakage sealed.
The using method of cryogenic liquid pump self-lubricating the most according to claim 8 contact device, is characterized in that: described height
Press indent and low pressure dynamic pressure groove is respectively adopted v-shaped structure or spiral structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610507895.7A CN106089692A (en) | 2016-07-01 | 2016-07-01 | A kind of cryogenic liquid pump self-lubricating contact device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610507895.7A CN106089692A (en) | 2016-07-01 | 2016-07-01 | A kind of cryogenic liquid pump self-lubricating contact device and method |
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|---|---|
| CN106089692A true CN106089692A (en) | 2016-11-09 |
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|---|---|---|---|
| CN201610507895.7A Pending CN106089692A (en) | 2016-07-01 | 2016-07-01 | A kind of cryogenic liquid pump self-lubricating contact device and method |
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Citations (9)
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|---|---|---|---|---|
| CN2432391Y (en) * | 2000-06-13 | 2001-05-30 | 石油大学(华东) | Linear fluid dynamic channel upstream pumping machine seal |
| JP2002257132A (en) * | 2001-02-28 | 2002-09-11 | Hitachi Powdered Metals Co Ltd | Dynamic pressure bearing |
| CN1666276A (en) * | 2002-07-01 | 2005-09-07 | 西加特技术有限责任公司 | Non-recirculating conical fluid dynamic bearing for an electric motor |
| CN1767325A (en) * | 2004-10-30 | 2006-05-03 | 鸿富锦精密工业（深圳）有限公司 | Hydrodynamic pressure bearing motor and adopt the fan of this motor |
| CN101776152A (en) * | 2010-03-05 | 2010-07-14 | 北京化工大学 | Outside pressurized type dynamic and static pressure gas lubricating and sealing device |
| CN201992064U (en) * | 2010-11-22 | 2011-09-28 | 西安永华集团有限公司 | Hydrostatic mechanical sealing device |
| JP2013242023A (en) * | 2012-05-22 | 2013-12-05 | Nippon Pillar Packing Co Ltd | Split mechanical seal |
| CN105114631A (en) * | 2015-08-11 | 2015-12-02 | 青岛海森流体机械工程研究院有限公司 | Shaft end sealing device and fluid conveying equipment |
| CN205350360U (en) * | 2016-01-20 | 2016-06-29 | 中国石油大学(华东) | Liquid film seal end face slot type structure that can two -way rotation |
-
2016
- 2016-07-01 CN CN201610507895.7A patent/CN106089692A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2432391Y (en) * | 2000-06-13 | 2001-05-30 | 石油大学(华东) | Linear fluid dynamic channel upstream pumping machine seal |
| JP2002257132A (en) * | 2001-02-28 | 2002-09-11 | Hitachi Powdered Metals Co Ltd | Dynamic pressure bearing |
| CN1666276A (en) * | 2002-07-01 | 2005-09-07 | 西加特技术有限责任公司 | Non-recirculating conical fluid dynamic bearing for an electric motor |
| CN1767325A (en) * | 2004-10-30 | 2006-05-03 | 鸿富锦精密工业（深圳）有限公司 | Hydrodynamic pressure bearing motor and adopt the fan of this motor |
| CN101776152A (en) * | 2010-03-05 | 2010-07-14 | 北京化工大学 | Outside pressurized type dynamic and static pressure gas lubricating and sealing device |
| CN201992064U (en) * | 2010-11-22 | 2011-09-28 | 西安永华集团有限公司 | Hydrostatic mechanical sealing device |
| JP2013242023A (en) * | 2012-05-22 | 2013-12-05 | Nippon Pillar Packing Co Ltd | Split mechanical seal |
| CN105114631A (en) * | 2015-08-11 | 2015-12-02 | 青岛海森流体机械工程研究院有限公司 | Shaft end sealing device and fluid conveying equipment |
| CN205350360U (en) * | 2016-01-20 | 2016-06-29 | 中国石油大学(华东) | Liquid film seal end face slot type structure that can two -way rotation |
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Application publication date: 20161109 |
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