CN109404273A - A kind of high pressure low temperature reciprocating pump cold end - Google Patents
A kind of high pressure low temperature reciprocating pump cold end Download PDFInfo
- Publication number
- CN109404273A CN109404273A CN201811220954.8A CN201811220954A CN109404273A CN 109404273 A CN109404273 A CN 109404273A CN 201811220954 A CN201811220954 A CN 201811220954A CN 109404273 A CN109404273 A CN 109404273A
- Authority
- CN
- China
- Prior art keywords
- compression
- cavity
- liquid
- cold end
- stage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007788 liquid Substances 0.000 claims abstract description 72
- 230000006835 compression Effects 0.000 claims abstract description 62
- 238000007906 compression Methods 0.000 claims abstract description 62
- 230000000694 effects Effects 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 15
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 2
- 230000000712 assembly Effects 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 10
- 239000001257 hydrogen Substances 0.000 abstract description 10
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 10
- 239000007789 gas Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- F04B53/08—Cooling; Heating; Preventing freezing
-
- 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
- F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
-
- 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
-
- 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
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Compressor (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses a kind of high pressure low temperature reciprocating pump cold ends, are related to reciprocating pump cold end technical field.Including liquid feeding end component, outlet end component, compression chamber component, liquid storage chamber and the cold end pump housing for accommodating compression chamber component and liquid storage chamber, the compression chamber component includes piston rod and compression chamber cavity, the compression chamber cavity is provided with one stage of compression cavity and two-stage compression cavity, liquid enters liquid storage chamber by the liquid feeding end component, then enter one stage of compression cavity in the case where the promotion of piston rod is made, two-stage compression cavity is entered by level-one liquid valve in the case where the pulling of piston rod is made, piston rod push away effect under two-stage compression cavity liquid by outlet end component flow out.Applied to liquid hydrogen or low device net positive suction head NPSHa working environment, working service is convenient.
Description
Technical field
The present invention relates to a kind of industries such as reciprocal pump technical field more particularly to chemical industry, industrial and mining enterprises, national defence scientific research institutes
Need, high pressure, the cold end of low temperature reciprocating pump.
Technical background
General low temperature reciprocating pump cold end mainly uses single stage compress structure at present, when reciprocal pump work, only carries out to liquid
Primary pressurization, conveying, volumetric efficiency is low, is not suitable for low-density medium: such as liquid hydrogen or low device net positive suction head NPSHa environment；
Feed liquor, return-air adapter tube are on the pump housing, and inlet is arranged in one jiao of cold end side or lower part, and gas returning port is arranged in cold end side
Or one jiao of top, it is smaller with working portion distance, it is low by specific gravity of gas and realize gas-liquid separation；Friction pair has piston rod and fills out
Material sealing, piston ring and cylinder, cylinder have abrasion after being used for a long time, need to change, and maintenance is complicated.And it is situated between for low-density
Matter: under liquid hydrogen or low device net positive suction head NPSHa working environment, the use of traditional low temperature reciprocating pump also has problem, such as
Pump housing corrosion etc..
Summary of the invention
The present invention provides a kind of high pressure low temperature reciprocating pump cold ends, and using Two-stage Compression, reasonable Arrangement feed liquor, goes out return-air
Liquid takes over position, improves its cavitation resistive property, is applied to liquid hydrogen or low device net positive suction head NPSHa working environment, to solve
Above-mentioned root problem.
Technical proposal that the invention solves the above-mentioned problems is: providing a kind of high pressure low temperature reciprocating pump cold end, including liquid feeding end
Component, outlet end component, compression chamber component, liquid storage chamber and the cold end pump housing for accommodating compression chamber component and liquid storage chamber, the pressure
Contracting chamber component includes piston rod and compression chamber cavity, and the compression chamber cavity is provided with one stage of compression cavity and two-stage compression chamber
Body, liquid enter liquid storage chamber by the liquid feeding end component, then enter one stage of compression cavity in the case where the promotion of piston rod is made,
Two-stage compression cavity is entered by level-one liquid valve in the case where the pulling of piston rod is made, in the two-stage compression chamber under pushing away effect of piston rod
The liquid of body is flowed out by outlet end component.
Preferably, the liquid feeding end component includes feed liquor pipe fitting and inlet tube collar nut, further includes being arranged in feed liquor
The feed liquor sealing element of pipe fitting endface.
It preferably, further include the mistake to be connected to liquid storage chamber and one stage of compression cavity being arranged on the wall of liquid storage chamber inner cavity
Discharge orifice.
It preferably, further include the return-air interface being arranged in above liquid feeding end component.
It preferably, further include being arranged in compression chamber cavity and around the seal assembly of piston rod setting.
Preferably, the first seal assembly of pressure produced by the seal assembly includes to seal one stage of compression and to
Seal the second seal assembly of pressure caused by two-stage compression.
It preferably, further include being set on the piston rod to reinforce piston rod operation stability and sustainable first close
The pump housing flange of sealing assembly.
Preferably, it is connected to a fixed between the pump housing flange and the cold end pump housing with fixing bolt and with pump housing sealing element guarantor
Hold the leakproofness of its connection.
It preferably, further include the reducer unit that is arranged in one stage of compression cavity and can be connected to liquid storage chamber.
It preferably, further include the overflow ducts being arranged at the first seal assembly to be connected to liquid storage chamber.
Beneficial effects of the present invention: the present invention uses Two-stage Compression, and reasonable Arrangement feed liquor, return-air, outlet end take over position,
Its cavitation resistive property is improved, liquid hydrogen or low device net positive suction head NPSHa working environment are applied to.And feed liquor, return-air interface are equal
In liquid storage chamber top, and return-air interface top is at the highest notch, and is conducive to gas-liquid quick separating, improves the feed speed of pump.
Hermetic unit is high-pressure section and low-pressure section, seals pressure caused by second level and one stage of compression respectively, and all dynamic sealings are equal
It is generated between piston rod and sealing element, when maintenance only needs to change sealing element or piston rod, easy to maintain.
Detailed description of the invention
Fig. 1 is a kind of high pressure low temperature reciprocating pump cold end structure figure of the specific embodiment of the invention;
Fig. 2 is a kind of inlet tube joint structure of high pressure low temperature reciprocating pump cold end of the specific embodiment of the invention.1- liquid feeding end
Component, 11- feed liquor pipe fitting, 12- collar nut, 13- feed liquor sealing element, 2- outlet end component, 3- compression chamber component, 31- are living
Stopper rod, 32- compression chamber cavity, 321- one stage of compression cavity, 322- two-stage compression cavity, the first seal assembly of 331-, 332-
Two seal assemblies, 4- liquid storage chamber, 41- flowing hole, 42- reducer unit, the 5- cold end pump housing, 6- return-air interface, 7- pump housing flange,
71- fixing bolt, 72- pump housing sealing element.
Specific embodiment
In order to illustrate the embodiments of the present invention more clearly with technical solution in the prior art, Detailed description of the invention will be compareed below
A specific embodiment of the invention.It should be evident that drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, and obtain other embodiments, the present invention is not restricted to the embodiment.
Please refer to Fig. 1, Fig. 2, a kind of high pressure low temperature reciprocating pump cold end of the specific embodiment of the invention, including liquid feeding end component
1, outlet end component 2, compression chamber component 3, liquid storage chamber 4 and the cold end pump housing 5 for accommodating compression chamber component 3 and liquid storage chamber 3, it is described
Compression chamber component 3 includes piston rod 31 and compression chamber cavity 32, and the compression chamber cavity 32 is provided with 321 He of one stage of compression cavity
Two-stage compression cavity 322, liquid enter liquid storage chamber 4 by the liquid feeding end component 1, then in the case where the promotion of piston rod 31 is made
Into one stage of compression cavity 321, two-stage compression cavity 322 is entered by level-one liquid valve in the case where the pulling of piston rod 31 is made,
Piston rod 31 pushes away the liquid for acting on lower two-stage compression cavity 322 by the outflow of outlet end component 2.
The liquid feeding end component 1 includes feed liquor pipe fitting 11 and inlet tube collar nut 12, further includes being arranged in inlet tube
The feed liquor sealing element 13 of 11 endface of connector, the feed liquor sealing element 13 is to guarantee the specific embodiment of the invention at liquid feeding end
Sealing performance.It further include the return-air interface 6 that 1 top of liquid feeding end component is set, after liquid hydrogen enters cold end by liquid feeding end,
In the Gaseous Hydrogen that is mingled with flowed out by return-air interface, to guarantee the purity of liquid hydrogen.It further include being arranged on 4 inner cavity wall of liquid storage chamber
The flowing hole 41 to be connected to liquid storage chamber 4 and one stage of compression cavity 321, liquid hydrogen enters after liquid storage chamber 4 by passing through inner cavity
The flowing hole 41 of circumference enters one stage of compression cavity 321.
It further include the seal assembly for being arranged in compression chamber cavity 32 and being arranged around piston rod 31.The seal assembly packet
First seal assembly 331 of pressure produced by including to seal one stage of compression and to seal pressure caused by two-stage compression
Second seal assembly 332.It further include being set on the piston rod 31 to reinforce 31 operation stability of piston rod and can support
The pump housing flange 7 of first seal assembly 331 is connected to a fixed between the pump housing flange 7 and the cold end pump housing 5 with fixing bolt 71
And the leakproofness of its connection is kept with pump housing sealing element 72.
It further include the reducer unit 42 that is arranged in one stage of compression cavity 321 and can be connected to liquid storage chamber 4, when one stage of compression is super
When crossing setting pressure, pressure reducing valve is opened, and liquid stays back liquid storage chamber, pressure release.
It further include being arranged at the first seal assembly 331 to the overflow ducts for being connected to liquid storage chamber 4, the overflow ducts are used
To guide a small amount of hydrogen liquid stream at the first seal assembly 331 to return in liquid storage chamber 4.
It does not refer to place above, is suitable for the prior art.
Specific embodiments of the present invention are described in detail above.It should be appreciated that those skilled in the art are without wound
The property made labour, which according to the present invention can conceive, makes many modifications and variations.Therefore, all those skilled in the art
Present inventive concept passes through the available technical solution of logical analysis, reasoning, or a limited experiment in the prior art, all
It should be in protection scope determined by the claims.
Claims (10)
1. a kind of high pressure low temperature reciprocating pump cold end, it is characterised in that: including liquid feeding end component (1), outlet end component (2), compression
Chamber component (3), liquid storage chamber (4) and the cold end pump housing (5) for accommodating compression chamber component (3) and liquid storage chamber (4), the compression chamber group
Part (3) includes piston rod (31) and compression chamber cavity (32), and the compression chamber cavity (32) is provided with one stage of compression cavity (321)
With two-stage compression cavity (322), liquid enters liquid storage chamber (4) by the liquid feeding end component (1), then in piston rod (31)
Promotion make it is lower enter one stage of compression cavity (321), second level is entered by level-one liquid valve in the case where the pulling of piston rod (31) is made
Compression chamber (322), piston rod (31) push away effect under two-stage compression cavity (322) liquid by outlet end component (2)
Outflow.
2. a kind of high pressure low temperature reciprocating pump cold end according to claim 1, it is characterised in that: the liquid feeding end component (1)
It further include feed liquor of the setting in feed liquor pipe fitting (11) endface including feed liquor pipe fitting (11) and inlet tube collar nut (12)
Sealing element (13).
3. a kind of high pressure low temperature reciprocating pump cold end according to claim 1, it is characterised in that: further include being arranged in liquid storage chamber
(4) flowing hole (41) to be connected to liquid storage chamber (4) and one stage of compression cavity (321) on the wall of inner cavity.
4. a kind of high pressure low temperature reciprocating pump cold end according to claim 1, it is characterised in that: further include being arranged in liquid feeding end
Return-air interface (6) above component (1).
5. a kind of high pressure low temperature reciprocating pump cold end according to claim 1, it is characterised in that: further include being arranged in compression chamber
In cavity (32) and around the seal assembly of piston rod (31) setting.
6. a kind of high pressure low temperature reciprocating pump cold end according to claim 5, it is characterised in that: the seal assembly includes using
To seal the first seal assembly (331) and to seal pressure caused by two-stage compression of pressure produced by one stage of compression
Two seal assemblies (332).
7. a kind of high pressure low temperature reciprocating pump cold end according to claim 1, it is characterised in that: further include being set in the work
To reinforce the pump housing flange (7) of piston rod (31) operation stability and sustainable first seal assembly (331) on stopper rod (31).
8. a kind of high pressure low temperature reciprocating pump cold end according to claim 7, it is characterised in that: the pump housing flange (7) with
The leakproofness for being connected to a fixed between the cold end pump housing (5) with fixing bolt (71) and keeping it to connect with pump housing sealing element (72).
9. a kind of high pressure low temperature reciprocating pump cold end according to claim 1, it is characterised in that: further include being arranged in level-one pressure
Contracting cavity (321) is interior and can be connected to the reducer unit (42) of liquid storage chamber (4).
10. a kind of high pressure low temperature reciprocating pump cold end according to claim 1, it is characterised in that: further include being arranged first
To be connected to the overflow ducts of liquid storage chamber (4) at seal assembly (331).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811220954.8A CN109404273B (en) | 2018-10-19 | 2018-10-19 | Cold end of high-pressure low-temperature reciprocating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811220954.8A CN109404273B (en) | 2018-10-19 | 2018-10-19 | Cold end of high-pressure low-temperature reciprocating pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109404273A true CN109404273A (en) | 2019-03-01 |
| CN109404273B CN109404273B (en) | 2024-02-09 |
Family
ID=65468572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811220954.8A Active CN109404273B (en) | 2018-10-19 | 2018-10-19 | Cold end of high-pressure low-temperature reciprocating pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109404273B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131129A (en) * | 2019-05-05 | 2019-08-16 | 英嘉动力科技无锡有限公司 | A kind of new structure cryogenic pump |
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| DE102017202521A1 (en) * | 2017-02-16 | 2018-08-16 | Stasskol Gmbh | Compressor with motion compensation device |
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| CN2387377Y (en) * | 1999-08-20 | 2000-07-12 | 四川空分设备(集团)有限责任公司 | Two-stage boosting zero-pressure low temp liquid pump |
| EP1348864A1 (en) * | 2001-01-05 | 2003-10-01 | Hitachi, Ltd. | High-pressure fuel feed pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110131129A (en) * | 2019-05-05 | 2019-08-16 | 英嘉动力科技无锡有限公司 | A kind of new structure cryogenic pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109404273B (en) | 2024-02-09 |
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