CN107120459A - Fuel gas injection valve is oriented to outside a kind of piezoelectric type of through type axial admission - Google Patents
Fuel gas injection valve is oriented to outside a kind of piezoelectric type of through type axial admission Download PDFInfo
- Publication number
- CN107120459A CN107120459A CN201710504617.0A CN201710504617A CN107120459A CN 107120459 A CN107120459 A CN 107120459A CN 201710504617 A CN201710504617 A CN 201710504617A CN 107120459 A CN107120459 A CN 107120459A
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- valve
- valve element
- piston
- sleeve
- fuel gas
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Links
- 238000002347 injection Methods 0.000 title claims abstract description 43
- 239000007924 injection Substances 0.000 title claims abstract description 43
- 239000002737 fuel gas Substances 0.000 title claims abstract description 42
- 239000013078 crystal Substances 0.000 claims abstract description 45
- 239000000567 combustion gas Substances 0.000 claims abstract description 33
- 239000007789 gas Substances 0.000 claims abstract description 25
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 24
- 239000012530 fluid Substances 0.000 claims abstract description 23
- 230000033001 locomotion Effects 0.000 claims abstract description 12
- 239000010720 hydraulic oil Substances 0.000 claims description 13
- 230000005284 excitation Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000011796 hollow space material Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 claims 2
- 241001676635 Lepidorhombus whiffiagonis Species 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/004—Actuating devices; Operating means; Releasing devices actuated by piezoelectric means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0686—Injectors
-
- 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
- F02M21/0248—Injectors
-
- 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
- F02M21/0248—Injectors
- F02M21/0251—Details of actuators therefor
- F02M21/0254—Electric actuators, e.g. solenoid or piezoelectric
-
- 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
- F02M21/0248—Injectors
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
-
- 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
- F02M21/0248—Injectors
- F02M21/0257—Details of the valve closing elements, e.g. valve seats, stems or arrangement of flow passages
- F02M21/026—Lift valves, i.e. stem operated valves
- F02M21/0269—Outwardly opening valves, e.g. poppet valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
-
- 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
Abstract
It is an object of the invention to provide be oriented to fuel gas injection valve outside a kind of piezoelectric type of through type axial admission, it is powered and is extended using piezo-electric crystal, after amplifying via fluid power amplifier, valve piston promotes circle ring disk to move upwards, valve rod band movable valve plug assembly is integrally lifted off a seat motion, realizes the function of gas valve jet；Valve element bottom is using seal band and then forms air inlet ring cavity, and combustion gas is entered axially into, and on the one hand avoids combustion gas interference, on the other hand alleviates valve seat quality；Using the valve seat construction with pressure stabilizing cavity, it can effectively inhibit the fluctuation of gaseous-pressure inside fuel gas injection valve, it is ensured that the stability of fuel gas injection valve whiff pressure；Pressure compensation opening is provided with armature, relief groove is provided with bottom plate, gas circuit inside and outside valve element assembly is promoted to reach balance, it is poor without gaseous-pressure above and below valve element assembly to ensure that, valve element assembly is avoided by extra axial force, the response speed of fuel gas injection valve is further increasing.
Description
Technical field
The present invention relates to a kind of fuel gas injection valve, the specifically gas injection on gas machine and bi-fuel internal combustion engine
Penetrate valve.
Background technology
Under the overall background of energy-saving and emission-reduction, in face of the increasingly deficient of fossil energy, the increasingly raising of emission regulation demands is sought
A kind of alternative fuel is looked for already to turn into the inexorable trend of internal combustion engine industry, natural gas, because its own wide material sources, heat
The advantages of value is high, exhaust emission is few, as the energy most with prospects.In internal combustion engine real work, make using natural gas
For the main fuel of internal combustion engine operation, the exhaust emission situation of internal combustion engine can be greatly reduced, to Optimization of Energy Structure, promotes economy can
Sustainable development has particularly important meaning, and internal combustion engine is already become in recent years as the internal combustion engine of main fuel using natural gas
Study hotspot in industry.Fuel gas injection valve is used as the important executive component in the air supply system of gas fuel engine, its property
The quality of energy directly affects the characteristic of internal combustion engine.At present, in the practical work process of fuel gas injection valve, according to internal combustion
The difference of machine rotating speed, the response time of fuel gas injection valve, that is, fuel gas injection valve needed tool typically at several milliseconds between a few tens of milliseconds
Standby high response speed is to meet the requirement that it is switched rapidly, and at the same time, fuel gas injection valve also needs possess as far as possible big outlet
Cross-sectional area, to ensure that internal combustion engine obtains sufficient fuel gas supply, in addition, supplying itself gas quantity during fuel gas injection valve work
How much, the characteristic such as the stability and control accuracy of spraying gaseous-pressure can impact to engine performance.
The content of the invention
It is an object of the invention to provide a kind of through type axial direction that lift is variable, response speed is high, whiff pressure is stable
Fuel gas injection valve is oriented to outside the piezoelectric type of air inlet.
The object of the present invention is achieved like this：
Fuel gas injection valve is oriented to outside a kind of piezoelectric type of through type axial admission of the present invention, it is characterized in that：Including valve body, valve
Seat, valve rod, piezo-electric crystal, fluid power amplifier, dividing plate, valve element assembly, valve seat are fixed on below valve body and the shape between valve body
Into valve space, the inner upper of valve body, which is fixed with the middle part of fixed block, fixed block, is provided with straight trough, and piezo-electric crystal is arranged in straight trough,
Set to set above dividing plate, dividing plate in the middle part of valve body and valve element assembly, the fluid power amplifier are set below fluid power amplifier, dividing plate
Including big piston, valve piston, sleeve, sleeve is arranged on dividing plate, and the center of sleeve upper end is thick outlet, the end of sleeve upper end
For thin outlet, big piston is arranged in thick outlet, and valve piston is arranged in thin outlet, is set between the flange and sleeve of big piston
Big piston support spring, sets the set below valve piston support spring, big piston, valve piston between the flange and sleeve of valve piston
Filled with hydraulic oil in cylinder, big piston upper surface fits together with piezo-electric crystal lower surface, and big piston exterior sets circle ring disk, small
Piston upper surface is fitted with circle ring disk lower surface, and groove, the two ends difference cloth of back-moving spring are respectively provided with circle ring disk and fixed block
Put in the groove of circle ring disk and fixed block, described valve element assembly includes armature, spring base, bottom plate, valve element, armature, bottom
Plate, valve element arrange that spring base is located at outside armature and between armature while being linked together by fastening bolt from top to bottom
Annular groove is formed, dividing plate lower surface sets annular groove, and the two ends of back-moving spring are arranged in the annular groove and spring base of dividing plate
Annular groove in, armature center sets pressure compensation opening, sets relief groove on bottom plate, valve element is hollow structure, valve element
Center pressure stabilizing cavity, pressure compensation opening, relief groove, the hollow space of valve element and center pressure stabilizing cavity are set on the valve seat of lower section
Communicate and constitute inner space, set on valve element and outlet annulus is set on seal band, seal band formation air inlet ring cavity, valve seat
And guide pad, guide pad is around valve element, and outlet annulus is located at below air inlet ring cavity, and gas outlet is set below outlet annulus,
Through hole and passage are set respectively on dividing plate, and the middle part of valve rod passes through through hole, and the top of valve rod is connected with circle ring disk, under valve rod
Side is fixed together by jump ring with armature.
The present invention can also include：
1st, the outer end of valve seat sets end pressure stabilizing cavity.
2nd, air inlet, the middle and lower part of fixed block and fluid power amplifier and and valve are formed between the top of fixed block and valve body
Inlet chamber is formed between body, diversion cavity, air inlet, inlet chamber, passage, diversion cavity phase are formed between valve element assembly and valve body
Lead to and constitute exterior space, exterior space is communicated with inner space, axial admission hole is set on valve element；
Combustion gas is vertically flowed into valve body via air inlet, along inlet chamber perpendicular flow, until passage is flowed through, a part
Combustion gas is flowed into valve element assembly inner space and valve seat center pressure stabilizing cavity, and remaining combustion gas continues to flow along diversion cavity, one
Divide and flowed into by axial admission hole, the air inlet ring cavity full of valve element, another part is full of the end pressure stabilizing cavity and valve element of seat outer end
Surrounding space；
When piezo-electric crystal is not powered on, the upper surface of seal band and valve seat on valve element is fitted close, and combustion gas is full of combustion gas
The exterior space of the valve inner of injection valve and inner space；Piezo-electric crystal be powered after, piezo-electric crystal by current excitation so as to
Elongation, promotes big piston to move downward, the hydraulic oil in sleeve is compressed, in the presence of hydraulic fluid pressure, valve piston to
Upper motion, valve rod is also moved upwards, under the fixation of jump ring, and band movable valve plug assembly is moved upwards, until in sleeve
Hydraulic fluid pressure returns to original state, and valve piston is no longer moved, and valve element assembly stops therewith, and axial direction of the combustion gas on valve element is entered
Stomata is flowed into, and by air inlet ring cavity, the space between valve element and valve seat is vertically flowed out after being finally oriented to via gas outlet；
After piezo-electric crystal power-off, piezo-electric crystal shortens, and in the presence of big piston support spring, big piston returns to initial position, sleeve
Interior hydraulic fluid pressure declines, and in the presence of back-moving spring, circle ring disk, valve piston are moved downward, and valve rod, valve element assembly are therewith
Move downward, until hydraulic fluid pressure returns to original state in sleeve, big piston, valve piston return to initial position, valve element combination
Body returns to initial position, and spool face is fitted with valve base surface, and fuel gas injection valve is closed, and gas circuit is closed.
Advantage of the invention is that：The utilization piezo-electric crystal of the present invention, which is powered, to be extended, via fluid power amplifier displacement enlargement
Afterwards, the valve piston being arranged symmetrically promotes circle ring disk smoothly to move upwards, and circle ring disk is overall by valve rod band movable valve plug assembly
Lifted off a seat under the outer guide effect of the guide pad in outside motion, realize the function of gas valve jet；The present invention uses piezoelectricity
The mode of crystal-driven, effectively increases the response speed of fuel gas injection valve, by the different current driver mode of piezo-electric crystal,
The lift for realizing fuel gas injection valve is variable；The present invention is using straight-through plenum system, it is ensured that the combustion gas entered in valve body
Abundance supply；Valve element bottom is using seal band and then forms air inlet ring cavity, and combustion gas is entered axially into, and on the one hand avoids combustion gas
Interference, it is ensured that gas circuit is balanced, and is on the other hand alleviated valve seat quality, is improved response speed；The present invention is using with voltage stabilizing
The valve seat construction of chamber, it can effectively inhibit the fluctuation of gaseous-pressure inside fuel gas injection valve, it is ensured that fuel gas injection valve sprays
The stability of atmospheric pressure；The present invention is provided with pressure compensation opening at armature, and relief groove is provided with bottom plate, promotes valve
Gas circuit reaches balance inside and outside core assembly, it is ensured that poor without gaseous-pressure above and below valve element assembly, it is to avoid valve element assembly by
To extra axial force, the response speed of fuel gas injection valve is further increasing, the control of fuel gas injection valve work is reduced
Difficulty.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is valve element composite unit structure enlarged drawing of the invention；
Fig. 3 moves towards figure for the gas circuit of the present invention；
Fig. 4 is valve element three-dimensional structure enlarged drawing；
Fig. 5 is valve seat three-dimensional structure enlarged drawing.
Embodiment
Illustrate below in conjunction with the accompanying drawings and the present invention is described in more detail：
It is the entirety that fuel gas injection valve is oriented to outside a kind of piezoelectric type of through type axial admission of the invention with reference to Fig. 1-5, Fig. 1
Structural representation, including 1 valve body, 2 piezo-electric crystals, 3 fixed blocks, 4 big pistons, 5 big piston support springs, 6 sealing rings, 7 sleeves,
9 back-moving springs, 10 circle ring disks, 11 valve rods, 12 valve piston support springs, 13 valve pistons, 15 jump rings, 16 dividing plates, the combination of 17 valve elements
Body, 19 O-ring seals and 20 valve seats, fixed block 3 are linked together using screw thread with valve body 1, its own is fixed on valve body 1
The center of side, fixed block 3 is provided with the straight trough of certain depth in center, and piezo-electric crystal 2 is arranged therein, on straight trough
The less through hole of the diameters of Fang Kaiyou mono-, for arranging connecting wires for piezo-electric crystal 2 and the outer control unit of valve body 1, under piezo-electric crystal 2
Surface is in contact with the big upper surface of piston 4, under the pretightning force effect of big piston support spring 5, the lower surface of piezo-electric crystal 2 with it is big
The upper surface of piston 4 is brought into close contact together, and the upper end of sleeve 7 is multiple exit form, and central outlet is thick outlet, and outlet around is thin
Outlet, is arranged symmetrically in the lower section of circle ring disk 10, and lower end is the closing chamber of a connection, and the lower end of big piston 4 is arranged in sleeve 8
In the thick outlet of the heart, big piston support spring 5 is located between the big flange of piston 4 and sleeve 7, it is ensured that big piston 4 will not integrally enter
Enter in sleeve 7, be filled with sleeve 7 above the thin outlet around the hydraulic oil 14 with certain pressure, sleeve 7 and be disposed with small work
Plug 13, the lower end of valve piston 13 is arranged therein, and valve piston support spring 12 is disposed between the flange of valve piston 13 and sleeve 7,
To ensure that valve piston 13 integrally will not enter in sleeve 7, it is disposed between big piston 4, the side surface of valve piston 13 and the inwall of sleeve 7
Sealing ring 6, to prevent the leakage of hydraulic oil 14 in sleeve 7, big piston 4, valve piston 13, big piston support spring 5, valve piston branch
Support spring 12 has together constituted with the fluid power amplifier of piezo-electric crystal with sleeve 7, and fluid power amplifier is as an integral arrangement in valve
The top of the median septum 16 of body 1, under the pretightning force effect of valve piston support spring 12, under the upper surface of valve piston 13 and circle ring disk 10
Surface is brought into close contact, and the two ends of back-moving spring 9 are arranged in the groove on fixed block 3 and circle ring disk 10, circle ring disk 10
Two ends are provided with circular hole, hole and are provided with screw thread, and circle ring disk 10 is linked together with valve rod 11 using screw thread, valve rod 11 be arranged in every
In through hole in plate 16, its lower end is fixed together using jump ring 15 with the upper end of valve element assembly 17, and the two ends of dividing plate 16 are also provided with
The passage being relatively large in diameter, has been sequentially arranged on valve element assembly 17, valve seat 20, valve seat 20 and has opened from top to bottom below dividing plate 16
Have bolt hole 39, be bolted to connection between valve seat 20 and valve body 1 together with, mating surface therebetween passes through fluid sealant
Enclose 19 to realize sealing, valve seat 20 is provided with pressure stabilizing cavity 8, valve seat 20 in center and close to two ends at seal band 26
The pressure stabilizing cavity 8 of heart position is connected with the combustion gas space inside valve element assembly 17, and the pressure stabilizing cavity 8 and valve body at the two ends of valve seat 20
Diversion cavity 35 in 1 is connected；
As shown in Fig. 2 outside a kind of piezoelectric type of through type axial admission be oriented to fuel gas injection valve valve element assembly 17 by
Armature 22, spring base 23, bottom plate 24, valve element 25, armature back-moving spring 28, pad 29 and fastening bolt 31 are constituted, and armature 22 leads to
Cross fastening bolt 31 to link together with bottom plate 24, valve element 25, one layer of pad 29, armature are disposed between armature 22 and bottom plate 24
Pressure compensation opening 27 is provided with 22, the top of bottom plate 24 is provided with four relief grooves 30, the pressure compensation opening of the center of armature 22
Relief groove 30 on 27 cooperation bottom plates 24 causes the inner space of valve element assembly 17 to be connected with exterior space, and inside and outside gas circuit reaches
To balance, the inside and outside combustion gas no pressure of valve element assembly 17 is poor, it is to avoid by extra axial force, spring base during from motion
23 are arranged on the top of bottom plate 24, and its internal side surface is in contact with the side surface of armature 22, and the two of armature back-moving spring 28
End is arranged in dividing plate 16 and on the annular groove of spring base 23, valve element 25 is made up of valve element main body, seal band 26, its circumference
It is fixed on four guide pads 18 on valve seat 20, it is ensured that itself perpendicularity, the integral arrangement of valve element assembly 17 is under dividing plate 16
Side；
As shown in figure 3, combustion gas is oriented in fuel gas injection valve outside a kind of piezoelectric type of through type axial admission, and first, combustion
Gas is vertically flowed into valve body 1 via air inlet 32, along the perpendicular flow of inlet chamber 33, until flowing through the two ends of 1 upper spacer of valve body 16
Passage 34, due to the presence of the relief groove 30 on the upper pressure balance hole 27 of armature 22 and bottom plate 24, valve element assembly
17 inner spaces are connected with space in valve body 1, and a part of combustion gas can be flowed into the inner space of valve element assembly 17, be filled with immediately
The inner space of valve element assembly 17 and the pressure stabilizing cavity 8 of the center of valve seat 20；Remaining combustion gas is flowed into along diversion cavity 35 is full of valve
Inside body 1, a part is flowed into by axial admission hole 36, full of there is certain depth to enter compression ring around multiple-sealed annulus 26
Chamber 37, another part is filled with the surrounding space of the pressure stabilizing cavity 8 and valve element 25 at the two ends of valve seat 20.Piezo-electric crystal 2 is not powered on
When, the surface of valve element 25 fits with the surface of valve seat 20, on the air inlet ring cavity 37 on valve element 25 and valve seat 20 near outlet annulus 21
Ring cavity do not connect；After piezo-electric crystal 2 is powered, piezo-electric crystal 2 extends, band movable valve plug assembly 17 after amplifying through fluid power amplifier
Motion upwards, the surface of valve element 25 departs from the surface of valve seat 20, and now air inlet ring cavity 37 is connected with the ring cavity near outlet annulus 21,
The lifting and take a seat of valve element 25 controls the break-make between the ring cavity near air inlet ring cavity 37 and outlet annulus 21.
In the fuel gas injection valve course of work, when piezo-electric crystal 2 is not powered on, in the presence of armature back-moving spring 28, valve element
Assembly 17 remains motionless in initial position, the upper table of the seal band 26 and valve seat 20 on valve element 25 in valve element assembly 17
Face is fitted close, and the air inlet ring cavity 37 on valve element 25 is not connected with the ring cavity on valve seat 20 near outlet annulus 21, and combustion gas is full of
Whole space inside the valve body 1 of fuel gas injection valve.After piezo-electric crystal 2 is powered, piezo-electric crystal 2 is by current excitation so as to stretch
It is long, promote big piston 4 to move downward, the hydraulic oil 14 in sleeve 7 is compressed, pressure rise, in the work of the pressure of hydraulic oil 14
Under, the valve piston 13 in sleeve 7 in thin outlet is moved upwards, and valve piston 13 is symmetrically distributed in the lower section of circle ring disk 10, steadily
Ground promotes circle ring disk 10 to move upwards, due to the connection function of screw thread, the also motion upwards of valve rod 11, finally in the fixation of jump ring 15
Under effect, the motion upwards of band movable valve plug assembly 17 in the motion process of valve element assembly 17, is realized outer by guide pad 18
It is oriented to, until the pressure of hydraulic oil 14 in sleeve 7 returns to original state, valve piston 13 is no longer moved, and valve element assembly 17 is therewith
Stop, valve element assembly 17 maintains a period of time in the position, and axial admission hole 36 of the combustion gas on valve element 25 is flowed into, by many
There is the air inlet ring cavity 37 of certain depth around road seal band 26, via the space between valve element 25 and valve seat 20, most pass through afterwards
By gas outlet 38 be oriented to after vertically flow out, between valve element 25 and valve seat 20 use multiple tracks annulus, face sealing, voltage stabilizing balance, and compared with
Wide annulus area can reduce impact, improve reliability, valve seat 20 is close to the two ends of air inlet ring cavity 37 and its center position
The pressure stabilizing cavity 8 that place is set causes the combustion gas of surrounding to be ventilated in flow process uniformly, air pressure balance；After combustion gas ejection is a certain amount of,
Piezo-electric crystal 2 starts power-off, and piezo-electric crystal 2 shortens, in the presence of big piston support spring 5, and big piston 4 is begun to return to initially
The pressure of hydraulic oil 14 declines in position, sleeve 7, in the presence of back-moving spring 9, and circle ring disk 10, valve piston 13 start downward fortune
Dynamic, valve rod 11, valve element assembly 17 are moved downward therewith, until the pressure of hydraulic oil 14 returns to original state, big piston in sleeve 7
4th, valve piston 13 returns to initial position, and now valve element assembly 17 is also corresponding returns to initial position, the surface of valve element 25 and valve seat
20 surfaces are fitted, and come back to initial position, and fuel gas injection valve is closed, and gas circuit is closed.
From the above-mentioned course of work：Fuel gas injection is oriented to outside a kind of piezoelectric type of through type axial admission of the present invention
Valve, in the course of the work, is powered using piezo-electric crystal 2 and extended, after fluid power amplifier displacement enlargement, the small work being arranged symmetrically
Plug 13 promotes the smoothly motion upwards of circle ring disk 10, and circle ring disk 10 is overall in outside with movable valve plug assembly 17 by valve rod 11
Lifted off a seat under the outer guide effect of guide pad 18 20 motions, realize the function of gas valve jet；The present invention uses piezo-electric crystal 2
The mode of driving, effectively increases the response speed of fuel gas injection valve, and the lift for realizing fuel gas injection valve is variable；The present invention is adopted
With straight-through plenum system, it is ensured that the sufficient supply of the combustion gas entered in valve body 1；The bottom of valve element 25 is entered using seal band 26
And air inlet ring cavity 37 is formed, combustion gas is entered axially into, and on the one hand avoids combustion gas interference, it is ensured that gas circuit is balanced, on the other hand
The mass of valve seat 20 is alleviated, response speed is improved；The present invention is using the structure of valve seat 20 with pressure stabilizing cavity 8, and it can be effective
Inhibit the fluctuation of gaseous-pressure inside fuel gas injection valve, it is ensured that the stability of fuel gas injection valve whiff pressure；The present invention in
Pressure compensation opening 27 is provided with armature 22, relief groove 30 is provided with bottom plate 24, is promoted inside and outside valve element assembly 17
Gas circuit reaches balance, it is ensured that valve element assembly is poor without gaseous-pressure about 17, it is to avoid valve element assembly 17 is by extra
Axial force, further increasing the response speed of fuel gas injection valve, reduce the control difficulty of fuel gas injection valve work.
It is oriented to fuel gas injection valve outside a kind of piezoelectric type of through type axial admission of the present invention, including it is valve body, piezo-electric crystal, solid
Determine block, it is big piston, big piston support spring, sealing ring, sleeve, back-moving spring, circle ring disk, valve rod, valve piston support spring, small
Piston, jump ring, valve element assembly, O-ring seal and valve seat, fixed block are linked together using screw thread with valve body, consolidate its own
The center above valve body is scheduled on, fixed block is provided with the straight trough of certain depth in center, and piezo-electric crystal is arranged therein,
The less through hole of a diameter is provided with above straight trough, for arranging connecting wires for piezo-electric crystal and valve body outer control unit, piezoelectricity
Crystal lower surface is in contact with big piston upper surface, under the pretightning force effect of big piston support spring, piezo-electric crystal lower surface
Together with being brought into close contact with big piston upper surface, sleeve upper end is multiple exit form, and central outlet is thick outlet, and outlet around is
Thin outlet, is arranged symmetrically in the lower section of circle ring disk, and lower end is the closing chamber of a connection, and the lower end of big piston is arranged in bushing core
Thick outlet in, big piston support spring is located between big plunger flange and sleeve, it is ensured that big piston will not integrally enter sleeve
It is interior, it is filled with above the hydraulic oil with certain pressure, the thin outlet of all around stems and is disposed with valve piston, valve piston in sleeve
End is arranged therein, and valve piston support spring is disposed between valve piston flange and sleeve, to ensure that valve piston will not be overall
Into in sleeve, sealing ring is disposed between big piston, valve piston side surface and sleeve lining, to prevent hydraulic oil in sleeve
Leakage, big piston, valve piston, big piston support spring, valve piston support spring and sleeve have together constituted with the liquid of piezo-electric crystal
Power amplifier, fluid power amplifier as an integral arrangement in the top of valve body median septum, in the pretension of valve piston support spring
Under power effect, valve piston upper surface is brought into close contact with circle ring disk lower surface, the two ends of back-moving spring be arranged in fixed block and
In groove on circle ring disk, the two ends of circle ring disk, which are provided with circular hole, hole, is provided with screw thread, is connected circle ring disk with valve rod using screw thread
Together, valve rod is arranged in the through hole in dividing plate, and its lower end is fixed together using jump ring with valve element assembly upper end, dividing plate
Two ends are also provided with the passage being relatively large in diameter, and have been sequentially arranged from top to bottom on valve element assembly, valve seat, valve seat below dividing plate
Be provided with bolt hole, be bolted to connection between valve seat and valve body together with, mating surface therebetween passes through O-ring seal
To realize sealing, valve seat is provided with pressure stabilizing cavity in center and close to two ends at seal band, valve seat center it is steady
Pressure chamber is connected with the combustion gas space inside valve element assembly, and the pressure stabilizing cavity at valve seat two ends is connected with the diversion cavity in valve body
It is logical；Foregoing valve element assembly is made up of armature, spring base, bottom plate, valve element, armature back-moving spring, pad and fastening bolt, rank
Tie Tong crosses fastening bolt and linked together with bottom plate, valve element, is disposed between armature and bottom plate on one layer of pad, armature and is provided with pressure
Four relief grooves are provided with above dynamic balance hole, bottom plate, the pressure compensation opening of armature center coordinates the pressure on bottom plate to put down
Weighing apparatus groove causes valve element assembly inner space to be connected with exterior space, and inside and outside gas circuit reaches balance, the interior external combustion of valve element assembly
Gas no pressure is poor, it is to avoid by extra axial force during from motion, and spring base is arranged on the top of bottom plate, its internal side
Surface is in contact with the side surface of armature, and the two ends of armature back-moving spring are arranged on the annular groove of dividing plate and spring base,
Valve element is made up of valve element main body, seal band, on its circumferentially fixed four guide pad on valve seat, it is ensured that itself perpendicularity,
Valve element assembly integral arrangement is below dividing plate；Combustion gas is vertically flowed into valve body via air inlet, along inlet chamber perpendicular flow,
Until the passage at valve body upper spacer two ends is flowed through, due to depositing for the relief groove on armature upper pressure balance hole and bottom plate
, valve element assembly inner space is connected with space in valve body, and a part of combustion gas can be flowed into valve element assembly inner space, with
It is filled with the pressure stabilizing cavity of valve element assembly inner space and valve seat center；Remaining combustion gas is flowed into along diversion cavity is full of valve
Internal portion a, part is flowed into by axial admission hole, full of the air inlet ring cavity with certain depth around multiple-sealed annulus, separately
A part is filled with the surrounding space of the pressure stabilizing cavity and valve element at valve seat two ends.When piezo-electric crystal is not powered on, spool face with
Valve base surface is fitted, and the air inlet ring cavity on valve element is not connected with the ring cavity of outlet adjacent annular bands on valve seat；Piezo-electric crystal is powered
Afterwards, piezo-electric crystal is extended, and band movable valve plug assembly is moved upwards after amplifying through fluid power amplifier, and spool face departs from valve seat table
Face, now air inlet ring cavity be connected with the ring cavity of outlet adjacent annular bands, lifting and taking a seat for valve element controls air inlet ring cavity with going out
Break-make between the ring cavity of gas adjacent annular bands.
Claims (3)
1. fuel gas injection valve is oriented to outside a kind of piezoelectric type of through type axial admission, it is characterized in that：Including valve body, valve seat, valve rod,
Piezo-electric crystal, fluid power amplifier, dividing plate, valve element assembly, valve seat are fixed on below valve body and valve space are formed between valve body,
The inner upper of valve body, which is fixed with the middle part of fixed block, fixed block, is provided with straight trough, and piezo-electric crystal is arranged in straight trough, is set in the middle part of valve body
Put to set above dividing plate, dividing plate and valve element assembly is set below fluid power amplifier, dividing plate, the fluid power amplifier includes big living
Plug, valve piston, sleeve, sleeve are arranged on dividing plate, and the center of sleeve upper end is thick outlet, and the end of sleeve upper end is carefully to go out
Mouthful, big piston is arranged in thick outlet, and valve piston is arranged in thin outlet, and big piston is set between the flange and sleeve of big piston
Support spring, sets between the flange and sleeve of valve piston and is filled in the sleeve below valve piston support spring, big piston, valve piston
There is hydraulic oil, big piston upper surface fits together with piezo-electric crystal lower surface, big piston exterior is set on circle ring disk, valve piston
Surface is fitted with circle ring disk lower surface, and groove is respectively provided with circle ring disk and fixed block, and the two ends of back-moving spring are arranged in circle
In the groove of the ring disk and fixed block, described valve element assembly includes armature, spring base, bottom plate, valve element, armature, bottom plate, valve element
Arrangement is linked together by fastening bolt simultaneously from top to bottom, and spring base is located at outside armature and annular is formed between armature
Groove, dividing plate lower surface sets annular groove, and the two ends of back-moving spring are arranged in the annular groove of dividing plate and the annular groove of spring base
Interior, armature center sets and sets relief groove on pressure compensation opening, bottom plate, and valve element is the valve below hollow structure, valve element
Center pressure stabilizing cavity is set on seat, and pressure compensation opening, relief groove, the hollow space of valve element and center pressure stabilizing cavity are communicated and structure
Into inner space, set on valve element and outlet annulus and guiding are set on seal band, seal band formation air inlet ring cavity, valve seat
Block, guide pad is located at around valve element, and outlet annulus is located at below air inlet ring cavity, is set below outlet annulus on gas outlet, dividing plate
Through hole and passage are set respectively, and the middle part of valve rod passes through through hole, and the top of valve rod is connected with circle ring disk, passed through below valve rod
Jump ring is fixed together with armature.
2. fuel gas injection valve is oriented to outside a kind of piezoelectric type of through type axial admission according to claim 1, it is characterized in that：
The outer end of valve seat sets end pressure stabilizing cavity.
3. fuel gas injection valve is oriented to outside a kind of piezoelectric type of through type axial admission according to claim 1 or 2, its feature
It is：Form air inlet between the top of fixed block and valve body, the middle and lower part of fixed block and fluid power amplifier and between valve body
Inlet chamber is formed, diversion cavity is formed between valve element assembly and valve body, air inlet, inlet chamber, passage, diversion cavity are communicated and structure
Into exterior space, exterior space is communicated with inner space, and axial admission hole is set on valve element；
Combustion gas is vertically flowed into valve body via air inlet, along inlet chamber perpendicular flow, until flowing through passage, a part of combustion gas
Be flowed into valve element assembly inner space and valve seat center pressure stabilizing cavity, remaining combustion gas continues to flow along diversion cavity, a part by
Axial admission hole is flowed into, the air inlet ring cavity full of valve element, the week of end pressure stabilizing cavity and valve element of the another part full of seat outer end
Confining space；
When piezo-electric crystal is not powered on, the upper surface of seal band and valve seat on valve element is fitted close, and combustion gas is full of fuel gas injection
The exterior space of the valve inner of valve and inner space；After piezo-electric crystal is powered, piezo-electric crystal by current excitation so as to extending,
Big piston is promoted to move downward, the hydraulic oil in sleeve is compressed, in the presence of hydraulic fluid pressure, and valve piston is transported upwards
Dynamic, valve rod is also moved upwards, under the fixation of jump ring, and band movable valve plug assembly is moved upwards, until the hydraulic pressure in sleeve
Oil pressure returns to original state, and valve piston is no longer moved, and valve element assembly stops therewith, axial admission hole of the combustion gas on valve element
Flow into, by air inlet ring cavity, the space between valve element and valve seat is vertically flowed out after being finally oriented to via gas outlet；Piezoelectricity
After crystal power-off, piezo-electric crystal shortens, and in the presence of big piston support spring, big piston returns to liquid in initial position, sleeve
Oil pressure declines, and in the presence of back-moving spring, circle ring disk, valve piston are moved downward, and valve rod, valve element assembly are downward therewith
Motion, until hydraulic fluid pressure returns to original state in sleeve, big piston, valve piston return to initial position, and valve element assembly is returned
To initial position, spool face is fitted with valve base surface, and fuel gas injection valve is closed, and gas circuit is closed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710504617.0A CN107120459B (en) | 2017-06-28 | 2017-06-28 | Piezoelectric type external guide gas injection valve with straight-through type axial air inlet |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710504617.0A CN107120459B (en) | 2017-06-28 | 2017-06-28 | Piezoelectric type external guide gas injection valve with straight-through type axial air inlet |
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| CN107120459B CN107120459B (en) | 2023-06-09 |
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| JPH02108849A (en) * | 1988-10-17 | 1990-04-20 | Yamaha Motor Co Ltd | Variable pressure device for high-pressure fuel injection device |
| JPH10331742A (en) * | 1997-06-03 | 1998-12-15 | Nissan Motor Co Ltd | Fuel injection valve of engine |
| CN105275672A (en) * | 2015-07-10 | 2016-01-27 | 重庆红江机械有限责任公司 | Electric control gas injection valve for engine |
| DE102014226367A1 (en) * | 2014-12-18 | 2016-06-23 | Robert Bosch Gmbh | Fuel injector |
| CN105756824A (en) * | 2016-04-21 | 2016-07-13 | 哈尔滨工程大学 | Combined piezoelectric fuel oil injection and pressurizing electromagnetic fuel gas injection mixed fuel injection device |
| CN106545449A (en) * | 2017-01-18 | 2017-03-29 | 哈尔滨工程大学 | A kind of On Fluctuations oil return electric-controlled fuel injector |
| CN106593726A (en) * | 2017-01-18 | 2017-04-26 | 哈尔滨工程大学 | Resonant electrically controlled oil injector with oil fed through double paths |
| CN206846040U (en) * | 2017-06-28 | 2018-01-05 | 哈尔滨工程大学 | Fuel gas injection valve is oriented to outside a kind of piezoelectric type of through type axial admission |
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2017
- 2017-06-28 CN CN201710504617.0A patent/CN107120459B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02108849A (en) * | 1988-10-17 | 1990-04-20 | Yamaha Motor Co Ltd | Variable pressure device for high-pressure fuel injection device |
| JPH10331742A (en) * | 1997-06-03 | 1998-12-15 | Nissan Motor Co Ltd | Fuel injection valve of engine |
| DE102014226367A1 (en) * | 2014-12-18 | 2016-06-23 | Robert Bosch Gmbh | Fuel injector |
| CN105275672A (en) * | 2015-07-10 | 2016-01-27 | 重庆红江机械有限责任公司 | Electric control gas injection valve for engine |
| CN105756824A (en) * | 2016-04-21 | 2016-07-13 | 哈尔滨工程大学 | Combined piezoelectric fuel oil injection and pressurizing electromagnetic fuel gas injection mixed fuel injection device |
| CN106545449A (en) * | 2017-01-18 | 2017-03-29 | 哈尔滨工程大学 | A kind of On Fluctuations oil return electric-controlled fuel injector |
| CN106593726A (en) * | 2017-01-18 | 2017-04-26 | 哈尔滨工程大学 | Resonant electrically controlled oil injector with oil fed through double paths |
| CN206846040U (en) * | 2017-06-28 | 2018-01-05 | 哈尔滨工程大学 | Fuel gas injection valve is oriented to outside a kind of piezoelectric type of through type axial admission |
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| CN107120459B (en) | 2023-06-09 |
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