CN110131129A - A kind of new structure cryogenic pump - Google Patents
A kind of new structure cryogenic pump Download PDFInfo
- Publication number
- CN110131129A CN110131129A CN201910366443.5A CN201910366443A CN110131129A CN 110131129 A CN110131129 A CN 110131129A CN 201910366443 A CN201910366443 A CN 201910366443A CN 110131129 A CN110131129 A CN 110131129A
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- hot end
- piston
- pressure
- cold end
- pump housing
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- 238000001816 cooling Methods 0.000 claims abstract description 32
- 238000006073 displacement reaction Methods 0.000 claims abstract description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 48
- 238000007789 sealing Methods 0.000 claims description 42
- 239000007789 gas Substances 0.000 claims description 33
- 239000002826 coolant Substances 0.000 claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000003345 natural gas Substances 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 239000012530 fluid Substances 0.000 claims description 20
- 239000010720 hydraulic oil Substances 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 18
- 238000009413 insulation Methods 0.000 claims description 9
- 238000007689 inspection Methods 0.000 claims description 8
- 238000013461 design Methods 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000013022 venting Methods 0.000 claims description 4
- 230000003319 supportive effect Effects 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims 1
- 239000003949 liquefied natural gas Substances 0.000 abstract description 35
- 238000002485 combustion reaction Methods 0.000 abstract description 11
- 239000000446 fuel Substances 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 description 10
- 230000004048 modification Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 238000002309 gasification Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000002045 lasting effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 241000233855 Orchidaceae Species 0.000 description 1
- 241000486406 Trachea Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0221—Fuel storage reservoirs, e.g. cryogenic tanks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0245—High pressure fuel supply systems; Rails; Pumps; Arrangement of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/06—Apparatus for de-liquefying, e.g. by heating
-
- 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
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/06—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for evacuating by thermal means
- F04B37/08—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for evacuating by thermal means by condensing or freezing, e.g. cryogenic pumps
-
- 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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
-
- 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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention belongs to supplying fuel for internal combustion engine technical fields, and in particular to a kind of new structure cryogenic pump.The new structure cryogenic pump, including cold end area, gaseous state cooling zone and hot end area, gaseous state cooling zone is equipped between the cold end area and hot end area, cold end area includes the cold end pump housing and vacuum every cover, cold end piston is equipped in the cold end pump housing, cold end pistons end is designed as annular groove opening form, cold end connecting rod head is installed in piston gap annular groove, the hot end area includes hot end piston, hot end piston is installed in the pump housing of hot end, pressure relief device is set on the piston of hot end, and displacement sensor is arranged in the hot end pump housing, and the gaseous state cooling zone is equipped with high-pressure air pipe.The beneficial effect is that: the liquefied natural gas in cryogenic tank can all be pumped out, increase the course continuation mileage of vehicle；Structure is simple and effective；Promote reliability；Processing technology is good, is convenient for producing in batches.
Description
Technical field
The invention belongs to supplying fuel for internal combustion engine technical fields, and in particular to a kind of new structure cryogenic pump.
Background technique
On Vehicles Collected from Market, using natural gas as in the internal-combustion engine vehicle of fuel, carrying mode of the natural gas on vehicle
It is divided into two kinds of compressed natural gas (CNG) and liquefied natural gas (LNG).Compressed natural gas (CNG) is the natural gas of high-pressure gaseous, is led to
The compressed natural gas of a normal volume is converted into the natural gas of 200 normal volumes.Liquefied natural gas (LNG) is the natural of liquid
The liquefied natural gas of gas, a usual volume is converted into the natural gas of 600 normal volumes.The lasting driveability of CNG vehicle is not
Foot is suitble to the small vehicles such as taxi to use.Opposite CNG vehicle, the lasting driveability of LNG vehicle greatly increases, medium and heavy
Lorry also has enough spaces to store equipment.
In current most of LNG vehicle, the liquefied natural gas in cryogenic tank is the gravity by itself from low
It is flowed out in warm tank, internal combustion engine is led to after gasifier gasification and carries out work by combustion.Liquefied natural gas in cryogenic tank makes
After using certain degree, remaining less liquefied natural gas (about 25% or so) can not smoothly be flowed out low by self gravity
Warm tank, being only replenished in time after enough liquefied natural gas can just continue to use, this not only affects the lasting traveling energy of vehicle
Power also creates the waste of memory space, increases additional burden for vehicle.
A kind of in-cylinder direct-jet technology of achievable dual fuel injection can effectively improve burning by the way of compression ignition
Efficiency.The double fuel direct injection technology first sprays a small amount of diesel oil in the combustion chamber, after compression ignition, is promoted in combustion in IC engine room
Temperature, ignite the compressed natural gas then sprayed, carries out work by combustion.The technology, can by efficiency of combustion promoted to 42% with
On, and PM value and the discharge of NOx can be largely reduced, and more to clean, more economical fuel injection system for IC engine.The double fuel
Spraying system at work, needs the high-pressure natural gas stable using pressure.The liquid flowed out from cryogenic tank by self gravity
Change natural gas, the pressure of the compressed natural gas after gasifier gasification is smaller, can not be bi-fuel internal combustion engine timing, quantitative
High-pressure natural gas is provided.
Currently there are cryogenic pump structure in, mainly have centrifugal cryogenic pump and reciprocating-piston cryogenic pump.
The liquefied gas pressure of centrifugal cryogenic pump pumping is relatively low, and driving device and the distance of liquefied gas at low temp are close, meeting
There is more heat transfer into liquefied gas at low temp, cause the gasification of liquefied gas, in contrast, reciprocating piston pump can be with
Driving end and low temperature cold end are separated by the way that connecting rod is farther away, heat leak can be reduced to greatest extent.Existing reciprocating-piston
Formula cryogenic pump haves the defects that more: low temperature pump connecting link is longer, and cryogenic pump both ends are connect by helicitic texture with piston,
Easily cause clamping stagnation even stuck when movement；By the conical surface or flat seal inside cryogenic pump, sealing surface is easily leaked；Drive end
It is directly connected to cold end by common metal part, heat leak is serious；Gasifier needs to lead to engine coolant in heat exchange, makes
After a period of time, scale can be generated inside gasifier, it can not cleaning and maintenance；When piston motion, can not accurate measurements displacement,
Cause piston slap failure etc..
It, can timing, quantitative by low temperature in conclusion need to develop a kind of completely new, perfect new structure cryogenic pump
Liquefied natural gas in tank pumps out, and with timing, quantitative to internal combustion engine conveying high-pressure natural gas, and guarantees that cryopump safety is reliable
Work, meet the needs of market and social development.
Summary of the invention
In order to compensate for the shortcomings of the prior art, the present invention provides a kind of new structure cryogenic pumps.
The present invention is achieved through the following technical solutions:
A kind of new structure cryogenic pump, including cold end area, gaseous state cooling zone and hot end area, set between the cold end area and hot end area
There is gaseous state cooling zone.Cold end area includes the cold end pump housing, cold end piston, cold end connecting rod etc., is equipped with cold end piston in the cold end pump housing,
Cold end pistons end is designed as annular groove opening form, cold end connecting rod head is installed in piston gap annular groove, the cold end pump housing
Head setting bellows, filter, ball seat, logical liquid valve and the first steel ball, the first steel ball are installed on the ball seat conical surface and logical liquid valve cone
In channel between face, check valve body is set on the cold end pump housing and air outlet adapter, the second steel ball are fixed with check valve body, high pressure gas
Pipe is installed on air outlet adapter by fastening nut, and in cold end area, the cold end pump housing other end passes through fastening bolt and cooled end flange
Connection, is arranged counter balance pocket, counter balance pocket is communicated with the second cavity and LNG tank chamber respectively, cold end between cooled end flange and the cold end pump housing
Sealing element is set on flange and cold end bearing shell, cold end bearing shell play a supportive role to cold end connecting rod, cooled end flange outer end and vacuum
It is sealed every cover by sealing element, connect cover is connect with cooled end flange, and is fastened by fastening nut, and the vacuum is every on cover
Setting pressurization tracheae, pressurization tracheae both ends are communicated with gas cooling chamber and LNG tank chamber respectively.The hot end area includes that hot end is living
Plug, hot end piston is installed in the pump housing of hot end, and forms third cavity and the 4th cavity, and hot end pistons end is designed as annular groove and opens
Hot end connecting rod head is installed in piston gap annular groove by degree of lip-rounding formula, between hot end piston and the hot end pump housing be arranged support ring and
Sealing element, pressure relief device is arranged on the piston of hot end, and displacement sensor is arranged in the hot end pump housing.The gaseous state cooling zone is equipped with high pressure
Tracheae, high-pressure air pipe are wound in gaseous state cooling zone, form gas cooling chamber, and insulation connecting rod connects cold end connecting rod with hot end
Bar connects.
Further, the pressure relief device includes the first pressure releasing valve core, the second pressure releasing valve core and pressure release spring, pressure release spring
First pressure releasing valve core and the second pressure releasing valve core are pressed on sealing cone by spring force, and it is living that the end face of pressure releasing valve core is higher by hot end
The end face of plug, when hot end piston is moved to displacement sensor, when hot end piston end surface is close to hot end pump housing hole wall, the first pressure release
Spool is first contacted with hole wall, and the first pressure releasing valve core and sealing cone are detached from, and third cavity and the 4th cavity pass through the first relief hole
It communicates, the fluid pressure balance of third cavity and the 4th cavity, avoids hot end piston and hot end pump housing hole wall that fierce collision, heat occurs
When end piston is moved to hot end bearing shell direction, the second pressure releasing valve core presses identical working principle, and hot end piston and hole wall is avoided to occur
Fierceness collision.
Further, hydraulic oil first passage and hydraulic oil second channel are set in the hot end pump housing, and hydraulic oil first is logical
Road is communicated with third cavity, and hydraulic oil second channel is communicated with the 4th cavity, hydraulic oil first passage and hydraulic oil second channel
It is connected by pipeline with reversal valve.
Further, in the hot end area, the hot end pump housing is mutually fixedly connected with hot end flange by fastening bolt, hot end flange
Upper setting hot end bearing shell and sealing element, support ring and sealing element, are arranged inspection socket between hot end bearing shell and support ring, pass through inspection
Mouth can detecte whether sealing element fails, to carry out the maintenance of cryogenic pump.Engine coolant is set on the flange of hot end
Entrance, engine coolant outlet, temperature sensor, temperature sensor can transmit the temperature letter of engine coolant outlet
Number.Connector, high-pressure air pipe and pressure sensor are set on the flange of hot end, and connector and hot end flange form three cavities, pressure sensing
Device can transmit the pressure signal of compressed natural gas in three cavities.Intensifier component is set on the pump housing of hot end, and pressurization spool passes through
Pressurized spring is pressed on sealing cone, and when pressurization spool is bullied pressure opening, three cavities pass through the gentle hole of three venting cavities, with
Booster cavity communicates.
Further, gasifier hardware is set in the hot end area, is mutually fixed with hot end flange, the gasifier of gasifier hardware
Heat exchange chamber is formed between shell and gasifier inner casing, heat exchange chamber is communicated with engine coolant entrance, gasifier inner casing packet
It encloses to form back to the fluid chamber, back to the fluid chamber is communicated with engine coolant outlet, and heat exchange chamber is communicated with back to the fluid chamber by liquid-passing hole.Gasification
Drain plug is arranged in device one end, after gasifier is using the stipulated time, the scale in heat exchange chamber can be cleared up by drain plug, even
It connects to be located at waterproof plug in cover and is equipped with thermal insulation board, high-pressure air pipe is in heat exchange chamber with the arrangement of cross-helicity shape, after heat exchange, height
Natural gas in air pipe leads to three cavities.
Further, venthole is set in the connect cover, and booster cavity is communicated by venthole with gas cooling chamber.
The beneficial effects of the present invention are: the LNG tank without cryogenic pump structure, liquefied natural gas passes through self gravity from cryogenic tank
Middle outflow, when liquefied natural gas surplus is less, it is impossible to smoothly flow out, need to be replenished in time, the present invention relates to it is low
Temperature pump, the liquefied natural gas in cryogenic tank can all be pumped out, increase the course continuation mileage of vehicle；Pass through the control of system structure
System, can by cryogenic tank liquefied natural gas timing, quantitative pump to gasifier, provided for injector injection high-pressure natural gas
Gas source；It is integrated with the function of gasifier, structure is simple, compact, and designs by structure, connects high-pressure air pipe sufficiently with coolant liquid
Touching carries out heat exchange, promotes the efficiency of gasifying liquefied gas；By the local road design of compressed natural gas supercharger structure, put down
Pressure in the cryogenic tank that weighs designs pressure charging system without additional for cryogenic tank, and structure is simple and effective；When piston and connecting rod are installed
It is not in clamping stagnation or stuck there are biggish freedom degree；It is provided with pressure relief device on the piston of hot end, prevents piston and the pump housing from swashing
Strong shock promotes reliability；Supporting ring structure is devised on piston, is carried out the guiding and auxiliary seal of piston, is improved piston
The craftsmanship of processing；Hot end area, which is provided with displacement sensor, can effectively control hot end piston by control unit and reversal valve
Displacement and speed, it is ensured that cryogenic pump carry out precise operation；It is provided with drain plug on gasifier, the maintenance of gasifier is facilitated to protect
It supports；Connecting rod is subjected to segment design, insulation connecting rod it is possible to prevente effectively from excessive heat to cold end block transitive；Utilize high pressure gas
Pipe devises gas cooling chamber, cools down to pressurization gas, and pressurization air pressure is avoided to transmit excessive heat into LNG tank chamber；
It is simple and effective using the disengaging of single steel ball control liquefied gas；Inspection socket is set, it is convenient effectively to detect the leakage of fluid
The maintenance of system；It provided with counter balance pocket, communicates the second cavity directly with LNG tank chamber, is convenient for pressure when piston motion accurately
Control, and when liquefied gas partial gasification, gasifying gas can be led in LNG tank chamber, avoid being partially formed excess pressure；It is whole
The design of body structure is simple, compact, sealing is effective, good reliability, and processing technology is good, is convenient for producing in batches.
Detailed description of the invention
The present invention will be further described below with reference to the drawings.
Attached drawing 1 is cryogenic pump assembly structure schematic diagram of the present invention；
Attached drawing 2 is cryogenic pump cold end plot structure figure of the present invention；
Attached drawing 3 is cryogenic pump gaseous state of the present invention cooling zone structure chart；
Attached drawing 4 is cryogenic pump hot end plot structure figure of the present invention；
Attached drawing 5 is cryogenic pump piston relief valve modification structures schematic diagram of the present invention；
Attached drawing 6 is cryogenic pump gasifier modification structures schematic diagram of the present invention；
Attached drawing 7 is low temperature pump piston of the present invention and connecting rod connection type modification structures schematic diagram；
Attached drawing 8 is cryogenic pump sealing means modification structures schematic diagram of the present invention；
Attached drawing 9 is that the present invention uses universal joint connection type structural schematic diagram；
Attached drawing 10 is connecting rod modification structures schematic diagram of the present invention.
In figure, 001 cold end area, 002 gaseous state cooling zone, 003 hot end area, the 01 cold end pump housing, 02 cold end piston, 03 cold end method
Orchid, 04 bellows, 05 filter, 06 ball seat, 07 fastening nut, 08 first steel ball, 09 logical liquid valve, 10 support rings, 11 sealing elements,
12 air outlet adapters, 13 high-pressure air pipes, 14 second steel balls, 15 check valve bodies, 16 one-way valve springs, 17 fastening nuts, 18 cold ends connect
Extension bar, 20 cold end bearing shells, 21 pressurization tracheaes, 22 vacuum are every cover, and 23 connect covers, 24 fastening nuts, 25 fastening bolts, 27 first hold
Chamber, 28 second cavities, 29 counter balance pockets, 30 second fluid holes, 31 first fluid holes, 32 insulation connecting rods, 33 hot end connecting rods, 34
Gas cooling chamber, 35 thermal insulation boards, 36 drain plugs, 37 gasifier shells, 38 gasifier inner casings, 40 connectors, 41 ventholes, 42 logical liquid
Hole, 43 heat exchange chambers, 44 back to the fluid chambers, 47 engine coolant entrances, the outlet of 48 engine coolants, 49 temperature sensors, 50
Inspection socket, 52 hot end bearing shells, 53 3 cavities, 54 connectors, 55 high-pressure air pipes, 56 hot end flanges, 57 3 venting cavities, 58 stomatas, 59
Pressurization spool, 60 pressurized springs, 62 first relief holes, 63 second pressure releasing valve cores, 64 pressure release springs, 65 first pressure releasing valve cores, 66
Hot end piston, 67 second relief holes, the 68 hot end pump housings, 69 third cavities, 70 the 4th cavities, 71 hydraulic oil second channels, 72 liquid
Pressure oil first passage, 73 displacement sensors, 76 reversal valves, 77 booster cavities, 78 pressure sensors, 79 spring bases, 80 first spools,
81 second spools, 82 pressure release valve springs, 83 first arrows, 84 second arrows, 85 valve body inner headed faces, 86 valve body oral area discs, 87
Valve body auxiliary tank.
Specific embodiment
Attached drawing 1-4 is a kind of specific embodiment of the invention.A kind of new structure cryogenic pump of the invention, including cold end area
001, gaseous state cooling zone 002 and hot end area 003 are equipped with gaseous state cooling zone 002 between the cold end area 001 and hot end area 003, cold
Petiolarea 001 includes the cold end pump housing 01, cold end piston 02, cold end connecting rod 18 etc., and cold end piston 02 is equipped in the cold end pump housing 01, cold
End 02 end of piston is designed as annular groove opening form, and 18 head of cold end connecting rod is installed in piston gap annular groove, cold end pump
01 head of body setting bellows 04, filter 05, ball seat 06, logical liquid valve 09 and the first steel ball 08, the first steel ball 08 are installed on ball
In channel between 06 conical surface of seat and logical 09 conical surface of liquid valve, check valve body 15 and air outlet adapter 12 are set on the cold end pump housing 01, the
Two steel balls 14 are fixed with check valve body 15, and high-pressure air pipe 13 is installed on air outlet adapter 12 by fastening nut 17, cold end area 001
In, 01 other end of the cold end pump housing is connect by fastening bolt 25 with cooled end flange 03, between cooled end flange 03 and the cold end pump housing 01
Counter balance pocket 29 is set, and counter balance pocket 29 is communicated with the second cavity 28 and LNG tank chamber respectively, and 11 He of sealing element is arranged on cooled end flange 03
Cold end bearing shell 20, cold end bearing shell 20 play a supportive role to cold end connecting rod 18, and 03 outer end of cooled end flange and vacuum pass through every cover 22
Sealing element 11 is sealed, and connect cover 23 is connect with cooled end flange 03, and is fastened by fastening nut 07, and the vacuum is every cover 22
Upper setting is pressurized tracheae 21, and pressurization 21 both ends of tracheae are communicated with gas cooling chamber 34 and LNG tank chamber respectively, the hot end area 003
Including hot end piston 66, hot end piston 66 is installed in the hot end pump housing 68, and forms third cavity 69 and the 4th cavity 70, hot end
66 end of piston is designed as annular groove opening form, connecting rod 33 head in hot end is installed in piston gap annular groove, hot end piston
Support ring 10 and sealing element 11 are set between 66 and the hot end pump housing 68, pressure relief device is set on hot end piston 66, the hot end pump housing 68 is set
Displacement sensor 73, the gaseous state cooling zone 002 are equipped with high-pressure air pipe 13, and high-pressure air pipe 13 is twined in gaseous state cooling zone 002
Around formation gas cooling chamber 34, insulation connecting rod 32 connects cold end connecting rod 18 and hot end connecting rod 33.
Further, the pressure relief device includes the first pressure releasing valve core 65, the second pressure releasing valve core 63 and pressure release spring 64, pressure release
First pressure releasing valve core 65 and the second pressure releasing valve core 63 are pressed on sealing cone by the spring force of spring 64, the end face of pressure releasing valve core
It is higher by the end face of hot end piston 66, when hot end piston 66 is moved to displacement sensor 73, near-thermal is leaned in piston 66 end face in hot end
When holding 68 hole wall of the pump housing, the first pressure releasing valve core 65 is first contacted with hole wall, and the first pressure releasing valve core 65 is detached from sealing cone, and third is held
Chamber 69 is communicated with the 4th cavity 70 by the first relief hole 62, and the fluid pressure balance of third cavity 69 and the 4th cavity 70 avoids
Fierce collision, when hot end piston 66 is moved to 52 direction of hot end bearing shell, second occur for hot end piston 66 and 68 hole wall of the hot end pump housing
Pressure releasing valve core 63 presses identical working principle, avoids hot end piston 66 and hole wall that fierce collision occurs.
Further, hydraulic oil first passage 72 and hydraulic oil second channel 71, hydraulic oil are set in the hot end pump housing 68
First passage 72 is communicated with third cavity 69, and hydraulic oil second channel 71 is communicated with the 4th cavity 70, hydraulic oil first passage 72
It is connected by pipeline with reversal valve 76 with hydraulic oil second channel 71.
Further, in the hot end area 003, the hot end pump housing 68 connects with hot end flange 56 by the way that 25 phase of fastening bolt is fixed
It connects, hot end bearing shell 52 and sealing element 11, support ring 10 and sealing element 11, hot end bearing shell 52 and support ring is set on hot end flange 56
Inspection socket 50 is set between 10, can detecte whether sealing element 11 fails by inspection socket 50, to carry out the maintenance of cryogenic pump
It maintains, engine coolant entrance 47, engine coolant outlet 48, temperature sensor 49, temperature is set on hot end flange 56
Sensor 49 can transmit the temperature signal of engine coolant outlet 48, and connector 40, high-pressure air pipe is arranged on hot end flange 56
13 and pressure sensor 78, connector 40 and hot end flange 56 form three cavities 53, and pressure sensor 78 can transmit three cavities 53
The pressure signal of middle compressed natural gas, intensifier component is arranged on the hot end pump housing 68, and pressurization spool 59 is pressed by pressurized spring 60
Tightly on sealing cone, when pressurization spool 59 is opened by atmospheric pressure, three cavities 53 are by three venting cavities 57 and stomata 58, with increasing
Pressure chamber 77 communicates.
Further, gasifier hardware is set in the hot end area 003, is fixed with 56 phase of hot end flange, gasifier hardware
Heat exchange chamber 43, heat exchange chamber 43 and 47 phase of engine coolant entrance are formed between gasifier shell 37 and gasifier inner casing 38
Logical, the encirclement of gasifier inner casing 38 forms back to the fluid chamber 44, and back to the fluid chamber 44 is communicated with engine coolant outlet 48, heat exchange chamber 43 and
Back to the fluid chamber 44 is communicated by liquid-passing hole 42, and drain plug 36 is arranged in gasifier one end, after gasifier is using the stipulated time, Ke Yitong
The scale that drain plug 36 is cleared up in heat exchange chamber 43 is crossed, is located at waterproof plug in connect cover 23 and is equipped with thermal insulation board 35, high-pressure air pipe
13 are arranged in heat exchange chamber 43 with cross-helicity shape, and after heat exchange, the natural gas in high-pressure air pipe 13 leads to three cavities 53.
Further, venthole 41 is set in the connect cover 23, and booster cavity 77 passes through venthole 41 and gas cooling chamber 34
It communicates.
A kind of new structure cryogenic pump of the invention, the 4th cavity 70 lead to high pressure liquid pressure oil, and third cavity 69 leads to low-pressure hydraulic
Oil, under action of hydraulic force, hot end piston 66 is moved to 83 direction of the first arrow.Meanwhile hot end piston 66 drives hot end connection
Bar 33, is insulated connecting rod 32, and cold end connecting rod 18 is moved to 83 direction of the first arrow.Cold end connecting rod 18 drives cold end piston 02
It is moved to 83 direction of the first arrow, the volume of the first cavity 27 is gradually increased, and the pressure in the first cavity 27 gradually decreases.This
When, under the effect of one-way valve spring 16, check valve body 15 is in close state with the two the second 14 Press fittings of steel ball.First steel ball
08 under action of hydraulic force, is detached from 06 conical surface of ball seat in LNG tank chamber, and the liquefied gas in LNG tank chamber passes through on logical liquid valve 09
Hole enters in the first cavity 27.Second cavity 28 is communicated by counter balance pocket 29 with LNG tank chamber, therefore the second cavity 28 and LNG tank chamber
Middle pressure is equal.
When in hot end, piston 66 is close to 68 hole wall position of the hot end pump housing, displacement signal is passed to control by displacement sensor 73
Unit, control unit control reversal valve 76 and switch hydraulic oil direction, and third cavity 69 leads to high pressure liquid pressure oil, and the 4th cavity 70 leads to low
Hydraulic fluid pressure oil, under action of hydraulic force, hot end piston 66 is moved to 84 direction of the second arrow.Meanwhile hot end piston 66 drives heat
Connecting rod 33 is held, connecting rod 32 is insulated, cold end connecting rod 18 is moved to 84 direction of the second arrow.
At this point, cold end connecting rod 18 drives cold end piston 02 to move to 84 direction of the second arrow, the first of cold end piston 02
The volume of cavity 27 is compressed, and the pressure in the first cavity 27 gradually rises.In the first cavity 27 under action of hydraulic force, first
Steel ball 08 is moved to 06 direction of ball seat, and is finally pressed on the sealing cone of ball seat 06.Hydraulic coupling in first cavity 27
It is transferred at the two the second steel balls 14 by the first fluid hole 31, with 27 pressure rise of the first cavity, hydraulic coupling overcomes unidirectionally
The spring force of valve spring 16, the two the second steel balls 14 are opened, and liquefied gas flows to high-pressure air pipe 13 by the second fluid hole 30.?
When liquefied gas gas coming through cooling chamber 34 in high-pressure air pipe 13, cooling effect is played to gas cooling chamber 34.
In the present invention, high temperature coolant after cycle of engine enters heat exchange by engine coolant entrance 47
Chamber 43, high-pressure air pipe 13 are arranged in the form of cross-helicity in heat exchange chamber 43, make coolant liquid in heat exchange chamber 43 along curve
Flowing sufficiently carries out heat with high-pressure air pipe 13 and exchanges.Coolant liquid goes out through liquid-passing hole 42, back to the fluid chamber 44 from engine coolant
Mouth 48 flows out.After liquefied gas enters heat exchange chamber 43 in high-pressure air pipe 13, heat is gasificated into compressed natural gas, flows to threeway
Chamber 53, and flowed out by high-pressure air pipe 55.
With the factors such as consumption of liquefied gas in LNG tank chamber, the pressure in LNG tank chamber is gradually decreased, and needs to pass through increasing
Depressor is pressurized LNG tank.In the present invention, pressure is relatively low in LNG tank chamber, and pressure can be relatively low simultaneously in booster cavity 77, in gas
Under pressure effect, pressurization spool 59 overcomes the spring force of pressurized spring 60 to be detached from sealing cone, and booster is opened, compressed natural gas
Booster cavity 77 is flowed to by stomata 58, gas cooling chamber 34 is flowed to by venthole 41, then flows to LNG by being pressurized tracheae 21
In chamber, booster is completed to the function of increasing pressure of LNG tank chamber.
In the present invention, there are a kind of hot end piston relief valve modification structures, see attached drawing 5.In modification structures, spring base is set
79, the first spool 80, the second spool 81, pressure release valve spring 82 etc., piston and hole wall close to when, the first spool 80 or the second spool
81 first contact with hole wall, and spool is detached from sealing surface, and third cavity 69 is communicated with the 4th cavity 70, prevent piston and hole wall from occurring to swash
Strong collision.
In the present invention, there are a kind of gasifier modification structures, see attached drawing 6.Inside gasifier, spiral labyrinth knot is set
Structure makes high-pressure air pipe 13 come into full contact with carry out heat exchange with coolant liquid in heat exchange chamber 43, and the structure is also to high-pressure air pipe 13
Play fixed function.Spiral labyrinth structure, according to processing technology situation, can be designed as with gasifier inner casing 38 it is fixed and with
Gasifier shell 37 fixes two kinds.
In the present invention, when piston is connect with connecting rod, there are a variety of connection variants, see attached drawing 7, include steel ball
Universal joint installation, piston pin installation, screw thread installation, bolt, retaining ring installation etc..
In the present invention, it includes ball face sealing that each sealing surface, which is shown in attached drawing 8 there are a variety of sealing means modification structures, cone
Face sealing, the sealing of plane form, sealing element sealing, engineering plastics sealing, couple clearance seal etc..
In the present invention, there are a kind of universal joint connection types, see attached drawing 9.In the connection type, it is arranged in check valve body 15
Valve body auxiliary tank 88, valve body inner headed face 85 is greater than 14 diameter of the second steel ball in check valve body 15, and valve body oral area disc 86 is less than the
Second steel ball 14 is overcome the tension of 15 oral area of check valve body, is pressed into valve body inner headed face 85 by two steel balls, 14 diameter.It assembles
Afterwards, the second steel ball 14 can be move freely in check valve body 15, and be not easy.This universal joint connection type, can be applied to
Check valve body and steel ball assemble, and piston is assembled with steel ball and other suitable structures.
In the present invention, there are modification structures for low temperature pump connecting link, see attached drawing 10, according to circumstances, can be by cold end connecting rod
18, be insulated connecting rod 32,33 groups of hot end connecting rod are combined into a connecting rod, connecting rod directly with hot end piston 66 and cold end piston
02 connection.
The present invention is not limited to the above-described embodiments, anyone should learn make under the inspiration of the present invention with the present invention
With same or similar technical solution, fall within the scope of protection of the present invention.
Technology not described in detail in the present invention, shape, construction portion are well-known technique.
Claims (6)
1. a kind of new structure cryogenic pump, including cold end area, gaseous state cooling zone and hot end area, which is characterized in that the cold end area
Gaseous state cooling zone is equipped between the area of hot end, cold end area includes the cold end pump housing, cold end piston, cold end connecting rod etc., the cold end pump housing
Interior to be equipped with cold end piston, cold end pistons end is designed as annular groove opening form, cold end connecting rod head is installed on piston gap
In annular groove, cold end pump housing head setting bellows, filter, ball seat, logical liquid valve and the first steel ball, the first steel ball are installed on ball seat
In channel between the conical surface and logical liquid valve cone face, check valve body and air outlet adapter be set, the second steel ball and unidirectional on the cold end pump housing
Valve body is fixed, and high-pressure air pipe is installed on air outlet adapter by fastening nut, and in cold end area, the cold end pump housing other end passes through fastening
Bolt is connect with cooled end flange, is arranged counter balance pocket between cooled end flange and the cold end pump housing, counter balance pocket respectively with the second cavity and LNG
Chamber communicates, and sealing element is arranged on cooled end flange and cold end bearing shell, cold end bearing shell play a supportive role to cold end connecting rod, cold end method
Blue outer end and vacuum are sealed every cover by sealing element, and connect cover is connect with cooled end flange, and are fastened by fastening nut, institute
Vacuum is stated every setting pressurization tracheae on cover, pressurization tracheae end is communicated with gas cooling chamber and LNG tank chamber respectively, the hot end area packet
Hot end piston is included, hot end piston is installed in the pump housing of hot end, and forms third cavity and the 4th cavity, the design of hot end pistons end
For annular groove opening form, hot end connecting rod head is installed in piston gap annular groove, is arranged between hot end piston and the hot end pump housing
Support ring and sealing element, are arranged pressure relief device on the piston of hot end, and the hot end pump housing is arranged displacement sensor, on the gaseous state cooling zone
Equipped with high-pressure air pipe, high-pressure air pipe is wound in gaseous state cooling zone, forms gas cooling chamber, insulation connecting rod by cold end connecting rod and
Hot end connecting rod connects.
2. a kind of new structure cryogenic pump according to claim 1, it is characterised in that: the pressure relief device is let out including first
Pressure valve core, the second pressure releasing valve core and pressure release spring, the spring force of pressure release spring is by the first pressure releasing valve core and the second pressure releasing valve core pressure
Tightly on sealing cone, the end face of pressure releasing valve core is higher by the end face of hot end piston, when hot end piston is moved to displacement sensor
When, when hot end piston end surface is close to hot end pump housing hole wall, the first pressure releasing valve core is first contacted with hole wall, the first pressure releasing valve core and sealing
The conical surface is detached from, and third cavity is communicated with the 4th cavity by the first relief hole, the fluid pressure balance of third cavity and the 4th cavity,
Avoid hot end piston and hot end pump housing hole wall that fierce collision, when hot end piston is moved to hot end bearing shell direction, the second pressure release occurs
Spool presses identical working principle, avoids hot end piston and hole wall that fierce collision occurs.
3. a kind of new structure cryogenic pump according to claim 1, it is characterised in that: be arranged in the hot end pump housing hydraulic
Oily first passage and hydraulic oil second channel, hydraulic oil first passage are communicated with third cavity, hydraulic oil second channel and the 4th
Cavity communicates, and hydraulic oil first passage and hydraulic oil second channel are connected by pipeline with reversal valve.
4. a kind of new structure cryogenic pump according to claim 1, it is characterised in that: in the hot end area, the hot end pump housing
It is mutually fixedly connected with hot end flange by fastening bolt, hot end bearing shell and sealing element, support ring and sealing is set on the flange of hot end
Inspection socket is arranged between hot end bearing shell and support ring in part, can detecte whether sealing element fails by inspection socket, low to carry out
Engine coolant entrance, engine coolant outlet, temperature sensor, temperature are arranged on the flange of hot end for the maintenance of temperature pump
Degree sensor can transmit the temperature signal of engine coolant outlet, and connector, high-pressure air pipe and pressure is arranged on the flange of hot end
Sensor, connector and hot end flange form three cavities, and pressure sensor can transmit the pressure letter of compressed natural gas in three cavities
Number, intensifier component is set on the pump housing of hot end, pressurization spool is pressed on sealing cone by pressurized spring, be pressurized spool by
When atmospheric pressure is opened, three cavities are communicated by the gentle hole of three venting cavities with booster cavity.
5. a kind of new structure cryogenic pump according to claim 1, it is characterised in that: gasifier is arranged in the hot end area
Component is mutually fixed with hot end flange, and heat exchange chamber is formed between the gasifier shell and gasifier inner casing of gasifier hardware, and heat is handed over
It changes chamber to communicate with engine coolant entrance, gasifier inner casing surrounds to form back to the fluid chamber, and back to the fluid chamber and engine coolant export
It communicates, heat exchange chamber is communicated with back to the fluid chamber by liquid-passing hole, and drain plug is arranged in gasifier one end, uses the stipulated time in gasifier
Afterwards, the scale in heat exchange chamber can be cleared up by drain plug, be located at waterproof plug in connect cover and be equipped with thermal insulation board, high-pressure air pipe
With the arrangement of cross-helicity shape in heat exchange chamber, after heat exchange, the natural gas in high-pressure air pipe leads to three cavities.
6. a kind of new structure cryogenic pump according to claim 1, it is characterised in that: ventilation is arranged in the connect cover
Hole, booster cavity are communicated by venthole with gas cooling chamber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910366443.5A CN110131129A (en) | 2019-05-05 | 2019-05-05 | A kind of new structure cryogenic pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910366443.5A CN110131129A (en) | 2019-05-05 | 2019-05-05 | A kind of new structure cryogenic pump |
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| CN110131129A true CN110131129A (en) | 2019-08-16 |
Family
ID=67576089
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| CN201910366443.5A Pending CN110131129A (en) | 2019-05-05 | 2019-05-05 | A kind of new structure cryogenic pump |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111997862A (en) * | 2020-07-23 | 2020-11-27 | 合肥通用机械研究院有限公司 | Double-acting reciprocating submerged liquid type liquid hydrogen pump |
| CN114542427A (en) * | 2022-04-26 | 2022-05-27 | 杭州新亚低温科技有限公司 | Zero suction pressure head cryogenic liquid pump |
| KR20230077794A (en) * | 2021-11-25 | 2023-06-02 | 한국기계연구원 | Reciprocating pump for cryogenic liquid with insulating structure |
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