CN107091355A - Fuel gas injection valve is oriented to outside a kind of piezoelectric type of bypass type axial admission - Google Patents
Fuel gas injection valve is oriented to outside a kind of piezoelectric type of bypass type axial admission Download PDFInfo
- Publication number
- CN107091355A CN107091355A CN201710504654.1A CN201710504654A CN107091355A CN 107091355 A CN107091355 A CN 107091355A CN 201710504654 A CN201710504654 A CN 201710504654A CN 107091355 A CN107091355 A CN 107091355A
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- valve
- valve element
- piston
- sleeve
- piezo
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- 238000002347 injection Methods 0.000 title claims abstract description 44
- 239000007924 injection Substances 0.000 title claims abstract description 44
- 239000002737 fuel gas Substances 0.000 title claims abstract description 43
- 239000000567 combustion gas Substances 0.000 claims abstract description 47
- 239000013078 crystal Substances 0.000 claims abstract description 46
- 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 21
- 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
- 239000003921 oil Substances 0.000 claims 2
- 239000007788 liquid Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 241001676635 Lepidorhombus whiffiagonis Species 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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 bypass type axial admission, it is powered and is extended using piezo-electric crystal, after fluid power amplifier displacement enlargement, the valve piston being arranged symmetrically promotes circle ring disk smoothly to move upwards, circle ring disk, with the overall motion of being lifted off a seat under the outer guide effect of the guide pad in outside of movable valve plug assembly, realizes the function of gas valve jet by valve rod；Using the plenum system of bypass, flowing of the combustion gas in valve body is oriented to；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 the valve seat construction with pressure stabilizing cavity, and 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.
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
With developing rapidly for society, the demand of the energy increasingly increases, and also increasingly sharpens the problem of environmental pollution, natural gas
Because of its own rich reserves, cheap and with good economy and emission performance, as the energy most with prospects,
Internal combustion engine industry, using natural gas as the main fuel of internal combustion engine operation, has significant effect for reduction emission problem, because
This, the study hotspot in internal combustion engine industry is already become using natural gas in recent years as the internal combustion engine of fuel.Fuel gas injection
Valve directly affects internal combustion engine as the important executive component in the air supply system of gas fuel engine, the quality of its performance
Characteristic.At present, in the practical work process of fuel gas injection valve, according to the difference of internal-combustion engine rotational speed, fuel gas injection valve
Response time, the characteristics of that is, fuel gas injection valve need to possess quick response was fast to meet its typically at several milliseconds between a few tens of milliseconds
The requirement of speed switch, at the same time, for meet internal combustion engine it is high-power when needed for fuel gas injection amount, fuel gas injection valve also needs to possess
Big fuel gas injection circulation area as far as possible, in addition, the flow regime of combustion gas itself during fuel gas injection valve work, whiff pressure is steady
The characteristics such as qualitative and control accuracy can be impacted to engine performance.
The content of the invention
Axially enter it is an object of the invention to provide a kind of bypass type that lift is variable, response quickly, whiff pressure are stable
Fuel gas injection valve is oriented to outside the piezoelectric type of gas.
The object of the present invention is achieved like this：
Fuel gas injection valve is oriented to outside a kind of piezoelectric type of bypass 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 body are fixedly arranged above in the middle part of fixed block, fixed block and opened
Have a straight trough, piezo-electric crystal is arranged in straight trough, and valve body is fixed on valve seat, dividing plate be set in valve body, fluid power amplifier set every
Above plate, valve element assembly is arranged on below dividing plate, forms valve space between the valve body and valve seat below dividing plate, the fluid power is put
Big device includes big piston, valve piston, sleeve, and sleeve is arranged on dividing plate, and the center of sleeve upper end is thick outlet, sleeve upper end
End is thin outlet, and big piston is arranged in thick outlet, and valve piston is arranged in thin outlet, between the flange and sleeve of big piston
Big piston support spring is set, set between the flange and sleeve of valve piston below valve piston support spring, big piston, valve piston
Sleeve in filled with hydraulic oil, big piston upper surface fits together with piezo-electric crystal lower surface, and big piston exterior sets annulus
Disk, valve piston upper surface is fitted with circle ring disk lower surface, and groove, the two ends point of back-moving spring are respectively provided with circle ring disk and fixed block
In the groove for not being arranged in circle ring disk and fixed block, described valve element assembly includes armature, spring base, bottom plate, valve element, rank
Iron, bottom plate, valve element arrange that spring base is located at outside armature and and armature while being linked together by fastening bolt from top to bottom
Between form annular groove, dividing plate lower surface sets annular groove, and the two ends of back-moving spring are arranged in the annular groove and bullet of dividing plate
In the annular groove of spring abutment, armature center sets and sets relief groove on pressure compensation opening, bottom plate, and valve element is hollow structure,
Center pressure stabilizing cavity is set on the valve seat below valve element, and pressure compensation opening, relief groove, the hollow space of valve element and center are steady
Pressure chamber communicates and constitutes inner space, is set on valve element and sets outlet on seal band, seal band formation air inlet ring cavity, valve seat
Annulus and guide pad, guide pad are located at around valve element, and outlet annulus is located at below air inlet ring cavity, and outlet is set below outlet annulus
Mouthful, through hole is set 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, and the lower section of valve rod passes through card
Spring is fixed together with armature.
The present invention can also include：
1st, the outer end of valve seat sets end pressure stabilizing cavity.
The 2nd, extension is set on valve body, and extension sets and sets diversion cavity in the valve body below air inlet, air inlet,
Air inlet, diversion cavity are communicated and constitute exterior space, and exterior space is communicated with inner space, and axial admission hole is set on valve element；
Combustion gas vertically flows into diversion cavity through air inlet, and a part of combustion gas is flowed into the center voltage stabilizing of inner space and valve seat
Chamber, remaining combustion gas is flowed into above valve element, and a part of combustion gas stream is through axial air admission hole, full of the air inlet ring cavity on valve element, another portion
Combustion gas is divided to flow into the end pressure stabilizing cavity of valve seat outer end；
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 present invention is powered using piezo-electric crystal to be extended, after fluid power amplifier displacement enlargement,
The valve piston being arranged symmetrically promotes circle ring disk smoothly to move upwards, and circle ring disk is overall outside by valve rod band movable valve plug assembly
Lifted off a seat under the outer guide effect of the guide pad of side motion, realize the function of gas valve jet；The present invention uses piezo-electric crystal
The mode of driving, effectively increases the response speed of fuel gas injection valve, by the different current driver mode of piezo-electric crystal, realizes
The lift of fuel gas injection valve is variable；The present invention is led using the plenum system of bypass to flowing of the combustion gas in valve body
To；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 ensure that gas circuit is balanced, on the other hand alleviate valve seat quality, improve response speed；The present invention is using the valve with pressure stabilizing cavity
Holder structure, it can effectively inhibit the fluctuation of gaseous-pressure inside fuel gas injection valve, it is ensured that fuel gas injection valve whiff pressure
Stability；The present invention is provided with pressure compensation opening at armature, and relief groove is provided with bottom plate, promotes valve element to combine
Inside and outside gas circuit reaches balance, it is ensured that poor without gaseous-pressure above and below valve element assembly, it is to avoid valve element assembly is by extra
Axial force, further increasing the response speed of fuel gas injection valve, reduce fuel gas injection valve work control difficulty.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is valve element composite unit structure schematic diagram of the invention；
Fig. 3 moves towards figure for the gas circuit of the present invention；
Fig. 4 is valve element tomograph；
Fig. 5 is valve seat top view.
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 bypass type axial admission of the invention with reference to Fig. 1-5, Fig. 1
Structural representation, including fixed block 1, piezo-electric crystal 2, valve body 3, back-moving spring 4, big piston 5, big piston support spring 6, sealing
Ring 7, sleeve 8, O-ring seal 9, O-ring seal 10, bolt 12, O-ring seal 13, circle ring disk 14, valve rod 15, valve piston branch
Spring 16, valve piston 17, dividing plate 19, jump ring 20, valve element assembly 21, outlet annulus 23 and valve seat 24 are supportted, valve body 3 is one rectangular
Body, the air inlet 35 and diversion cavity 36 of combustion gas is being provided with close to its center one end, in the other end close to the center of valve body 3 vertically
The dividing plate 19 that certain depth is separated with the middle of the hole of certain depth, holes, the hole space of the lower section of dividing plate 19 and water conservancy diversion are provided with up and down
Chamber 36 is connected, and fixed block 1 is linked together it with valve body 3 using bolt 12, its own is fixed on dividing plate 19
Sealing is kept in the center on square hole top, the mating surface between fixed block 1 and valve body 3 by O-ring seal 13, Gu
Determine the straight trough that block 1 is provided with certain depth in center, piezo-electric crystal 2 is arranged therein, be provided with above straight trough a diameter compared with
Small through hole, for arranging connecting wires for piezo-electric crystal 2 and the outer control unit of valve body 3, the lower surface of piezo-electric crystal 2 and big piston 5
Upper surface is in contact, and under the pretightning force effect of big piston support spring 6, the lower surface of piezo-electric crystal 2 and the big upper surface of piston 5 are tight
Closely connected to be combined, the upper end of sleeve 8 is multiple exit, and central outlet is thick outlet, and outlet around is thin outlet, is arranged symmetrically in circle
The lower section of the ring disk 14, lower end is the closing chamber of a connection, and the lower end of big piston 5 is arranged in the thick outlet at the center of sleeve 8, big living
Fill in support spring 6 to be located between the big flange of piston 5 and sleeve 8, it is ensured that big piston 5 integrally will not enter in sleeve 8, in sleeve 8
It is filled with above the hydraulic oil 18 with certain pressure, the thin outlet at the two ends of sleeve 8 and is disposed with valve piston 17, the lower end of valve piston 17
It is arranged therein, valve piston support spring 16 is disposed between the flange of valve piston 17 and sleeve 8, ensures that valve piston 17 will not
It is overall to enter in sleeve 8, sealing ring 7 is disposed between big piston 5, the side surface of valve piston 17 and the inwall of sleeve 8, to prevent sleeve
The leakage of hydraulic oil 18 in 8, big piston 5, valve piston 17, big piston support spring 6, valve piston support spring 16 and sleeve 8 one
With constituting the fluid power amplifier of piezo-electric crystal, fluid power amplifier as an integral arrangement in the top of the median septum 19 of valve body 3,
Under the pretightning force effect of valve piston support spring 16, the upper surface of valve piston 17 is brought into close contact with the lower surface of circle ring disk 14, is resetted
The two ends of spring 4 are arranged in fixed block 1 and in the groove on circle ring disk 14, the two ends of circle ring disk 14 are provided with circular hole, hole
Screw thread is provided with, circle ring disk 14 is linked together with valve rod 15 using screw thread, valve rod 15 is arranged in the through hole in dividing plate 19, its
Lower end is fixed together using jump ring 20 with the upper end of valve element assembly 21, and valve element has been sequentially arranged from top to bottom below dividing plate 19
Assembly 21, valve seat 24, be bolted to connection between valve seat 24 and valve body 3 together with, mating surface therebetween passes through
O-ring seal 10 realizes sealing, and valve seat 24 is provided with pressure stabilizing cavity 11 in center and close to two ends at seal band 29,
The pressure stabilizing cavity 11 of the center of valve seat 24 is connected with the combustion gas space inside valve element assembly 21, and the voltage stabilizing at the two ends of valve seat 24
Chamber 11 is connected with the inner space of valve body 3.
As shown in Fig. 2 outside a kind of piezoelectric type of bypass type axial admission be oriented to fuel gas injection valve valve element assembly 21 by
Armature 25, spring base 26, bottom plate 27, valve element 28, armature back-moving spring 31, pad 32 and fastening bolt 34 are constituted, and armature 25 leads to
Cross fastening bolt 34 to link together with bottom plate 27, valve element 28, one layer of pad 32, armature are disposed between armature 25 and bottom plate 27
Pressure compensation opening 30 is provided with 25, the top of bottom plate 27 is provided with four relief grooves 33, the pressure compensation opening of the center of armature 25
Relief groove 33 on 30 cooperation bottom plates 27 causes the inner space of valve element assembly 21 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 21 is poor, it is to avoid by extra axial force, spring base during from motion
26 are arranged on the top of bottom plate 27, and its internal side surface is in contact with the side surface of armature 25, and the two of armature back-moving spring 31
End is arranged in dividing plate 19 and on the annular groove of spring base 26, valve element 28 is made up of valve element main body, seal band 29, its circumference
It is fixed on four guide pads on valve seat 24, it is ensured that itself perpendicularity, the integral arrangement of valve element assembly 21 is below dividing plate 19.
As shown in figure 3, combustion gas is oriented in fuel gas injection valve outside a kind of piezoelectric type of bypass type axial admission, and first, combustion
Gas is by the enterprising gas port 35 of valve body 3 vertically into after being oriented to through diversion cavity 36, fuel gas flow direction is changed to level side by vertical direction
To the surrounding space of inflow valve element assembly 21, due to the relief groove 33 on the upper pressure balance hole 30 of armature 25 and bottom plate 27
Presence, the inner space of valve element assembly 21 connected with space in valve body 3, and a part of combustion gas can be flowed into valve element assembly 21
Portion space, is filled with the pressure stabilizing cavity 11 of the inner space of valve element assembly 21 and the center of valve seat 24 immediately；Remaining combustion gas is flowed into
The top of valve element 28, axial admission hole 37 of a part of combustion gas on valve element 28 is flowed into, around multiple-sealed annulus 29
Air inlet ring cavity 38 with certain depth, another part combustion gas is filled with pressure stabilizing cavity 11 at the two ends of valve seat 24 and valve element 28
Surrounding space.When piezo-electric crystal 2 is not powered on, the surface of valve element 28 fits with the surface of valve seat 24, the air inlet ring cavity 38 on valve element 28
Do not connected with the ring cavity on valve seat 24 near outlet annulus 23；After piezo-electric crystal 2 is powered, piezo-electric crystal 2 extends, and amplifies through fluid power
The motion upwards of band movable valve plug assembly 21 after device amplification, the surface of valve element 28 departs from the surface of valve seat 24, and now air inlet ring cavity 38 is with going out
Ring cavity near compression ring band 23 is connected, and lifting and taking a seat for valve element 28 is controlled near air inlet ring cavity 38 and outlet annulus 23
Break-make between ring cavity.
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 31, valve element
Assembly 21 remains motionless in initial position, the upper table of the seal band 29 and valve seat 24 on valve element 28 in valve element assembly 21
Face is fitted close, and the air inlet ring cavity 38 on valve element 28 is not connected with the ring cavity on valve seat 24 near outlet annulus 23, and combustion gas is full of
Whole space inside the valve body 3 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 5 to move downward, the hydraulic oil 18 in sleeve 8 is compressed, pressure rise, in the work of the pressure of hydraulic oil 18
Under, the valve piston 17 in sleeve 8 in thin outlet is moved upwards, and valve piston 17 is symmetrically distributed in the lower section of circle ring disk 14, steadily
Ground promotes circle ring disk 14 to move upwards, due to the connection function of screw thread, the also motion upwards of valve rod 15, finally in the fixation of jump ring 20
Under effect, the motion upwards of band movable valve plug assembly 21 in the motion process of valve element assembly 21, is realized outer by guide pad 22
It is oriented to, until the pressure of hydraulic oil 18 in sleeve 8 returns to original state, valve piston 17 is no longer moved, and valve element assembly 21 is therewith
Stop, valve element assembly 21 maintains a period of time in the position, and axial admission hole 37 of the combustion gas on valve element 28 is flowed into, by many
There is the air inlet ring cavity 38 of certain depth around road seal band 29, via the space between valve element 28 and valve seat 24, most pass through afterwards
By gas outlet 39 be oriented to after vertically flow out, between valve element 28 and valve seat 24 use multiple tracks annulus, face sealing, voltage stabilizing balance, and compared with
Wide annulus area can reduce impact, improve reliability, valve seat 24 is close to the two ends of air inlet ring cavity 38 and its center position
The pressure stabilizing cavity 11 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 6, and big piston 5 is begun to return to initially
The pressure of hydraulic oil 18 declines in position, sleeve 8, in the presence of back-moving spring 4, and circle ring disk 14, valve piston 17 start downward fortune
Dynamic, valve rod 15, valve element assembly 21 are moved downward therewith, until the pressure of hydraulic oil 18 returns to original state, big piston in sleeve 8
5th, valve piston 17 returns to initial position, and now valve element assembly 21 is also corresponding returns to initial position, the surface of valve element 28 and valve seat
24 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 bypass 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 17 promotes the smoothly motion upwards of circle ring disk 14, and circle ring disk 14 is overall in outside with movable valve plug assembly 21 by valve rod 15
Lifted off a seat under the outer guide effect of guide pad 22 24 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, by the different current driver mode of piezo-electric crystal 2, real
The lift for having showed fuel gas injection valve is variable；The present invention is carried out using the plenum system of bypass to flowing of the combustion gas in valve body 3
It is oriented to；The bottom of valve element 28 is using seal band 29 and then forms air inlet ring cavity 38, and combustion gas is entered axially into, and on the one hand avoids combustion
Gas is interfered, it is ensured that gas circuit is balanced, and is on the other hand alleviated the mass of valve seat 24, is improved response speed；The present invention is used and carried
The structure of valve seat 24 of pressure stabilizing cavity 11, it can effectively inhibit the fluctuation of gaseous-pressure inside fuel gas injection valve, it is ensured that combustion gas
The stability of injection valve whiff pressure；The present invention is provided with pressure compensation opening 30 at armature 25, and pressure is provided with bottom plate 27
Dynamic balance groove 33, promotes gas circuit inside and outside valve element assembly 21 to reach balance, it is ensured that valve element assembly is about 21 without gaseous-pressure
Difference, it is to avoid valve element assembly 21 further increasing the response speed of fuel gas injection valve by extra axial force, is reduced
The control difficulty of fuel gas injection valve work.
Be oriented to fuel gas injection valve outside a kind of piezoelectric type of bypass type axial admission of the present invention, including fixed block, piezo-electric crystal,
Valve body, back-moving spring, big piston, big piston support spring, sealing ring, sleeve, O-ring seal, bolt, circle ring disk, valve
Bar, valve piston support spring, valve piston, jump ring, valve element assembly and valve seat, valve body are a cuboid, close to its center one
End is provided with the air inlet and diversion cavity of combustion gas, and certain depth is provided with vertically in the other end close to valve body center
It is separated with the hole space below the dividing plate of certain depth, dividing plate in the middle of hole, holes with diversion cavity to be connected, fixed block utilizes and positions spiral shell
Bolt links together it with valve body, the center for making its own be fixed on dividing plate upper aperture top, in fixed block and valve body
Between mating surface on sealing is kept by O-ring seal, fixed block is provided with the straight trough of certain depth, piezoelectricity in center
Crystal is arranged therein, and the less through hole of a diameter is provided with above straight trough, for arranging piezo-electric crystal and valve body outer control list
First connects wires, and piezo-electric crystal lower surface is in contact with big piston upper surface, under the pretightning force effect of big piston support spring,
Together with piezo-electric crystal lower surface is brought into close contact with big piston upper surface, sleeve upper end is multiple exit, and central outlet is thick outlet,
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, the lower end arrangement of big piston
In the thick outlet of bushing core, big piston support spring is located between big plunger flange and sleeve, it is ensured that big piston will not be whole
Body enters in sleeve, is filled with sleeve above the hydraulic oil with certain pressure, the thin outlet at sleeve two ends and is disposed with small work
Plug, valve piston lower end is arranged therein, and valve piston support spring is disposed between valve piston flange and sleeve, to ensure small work
Plug integrally will not enter in sleeve, sealing ring is disposed between big piston, valve piston side surface and sleeve lining, to prevent sleeve
The leakage of interior hydraulic oil, big piston, valve piston, big piston support spring, valve piston support spring and sleeve have together constituted with pressure
The fluid power amplifier of electric crystal, fluid power amplifier, in the top of valve body median septum, is supported as an integral arrangement in valve piston
Under the pretightning force effect of spring, valve piston upper surface is brought into close contact with circle ring disk lower surface, and the two ends of back-moving spring are respectively arranged
In the groove on fixed block and circle ring disk, the two ends of circle ring disk, which are provided with circular hole, hole, is provided with screw thread, using screw thread by circle ring disk
Linked together with valve rod, valve rod is arranged in the through hole in dividing plate, its lower end is fixed using jump ring with valve element assembly upper end
Together, it has been sequentially arranged from top to bottom on valve element assembly, valve seat, valve seat below dividing plate and has been provided with bolt hole, valve seat and valve
It is bolted to connection between body together, mating surface therebetween realizes sealing by O-ring seal, and valve seat is in
Two ends are provided with inside pressure stabilizing cavity, the pressure stabilizing cavity and valve element assembly of valve seat center at heart position and close seal band
Combustion gas space be connected, and the pressure stabilizing cavity at valve seat two ends is connected with valve inner space；Foregoing valve element assembly is by holding in the mouth
Iron, spring base, bottom plate, valve element, armature back-moving spring, pad and fastening bolt composition, armature pass through fastening bolt and bottom plate, valve
Core is linked together, and is disposed between armature and bottom plate on one layer of pad, armature and is provided with pressure compensation opening, and four are provided with above bottom plate
Individual relief groove, the pressure compensation opening of armature center coordinates the relief groove on bottom plate to cause sky inside valve element assembly
Between connected with exterior space, inside and outside gas circuit reaches balance, and the inside and outside combustion gas no pressure of valve element assembly is poor, it is to avoid from motion
When by extra axial force, spring base is arranged on the top of bottom plate, and its internal side surface is in contact with the side surface of armature,
The two ends of armature back-moving spring are arranged on the annular groove of dividing plate and spring base, and valve element is by valve element main body, seal band group
Into on its circumferentially fixed four guide pad on valve seat, it is ensured that itself perpendicularity, valve element assembly integral arrangement is under dividing plate
Side；Combustion gas is by the enterprising gas port of valve body vertically into after being oriented to through diversion cavity, fuel gas flow direction is changed to level side by vertical direction
To inflow valve element assembly surrounding space, due to the presence of 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, be full of immediately
The pressure stabilizing cavity of valve element assembly inner space and valve seat center；Remaining combustion gas flows into the top of valve element, a part of combustion gas
Axial admission hole on valve element is flowed into, full of the air inlet ring cavity with certain depth around multiple-sealed annulus, another portion
Point combustion gas 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 bypass 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 body are fixedly arranged above in the middle part of fixed block, fixed block and are provided with straight trough,
Piezo-electric crystal is arranged in straight trough, and valve body is fixed on valve seat, and dividing plate is set in valve body, and fluid power amplifier is set above dividing plate,
Valve element assembly is arranged on below dividing plate, and valve space, the fluid power amplifier bag are formed between the valve body and valve seat below dividing plate
Big piston, valve piston, sleeve are included, sleeve is arranged on dividing plate, the center of sleeve upper end is thick outlet, and the end of sleeve upper end is
Thin outlet, big piston is arranged in thick outlet, and valve piston is arranged in thin outlet, sets big between the flange and sleeve of big piston
Piston support spring, sets the sleeve below valve piston support spring, big piston, valve piston between the flange and sleeve of valve piston
In filled with hydraulic oil, big piston upper surface fits together with piezo-electric crystal lower surface, and big piston exterior sets circle ring disk, small work
Surface is fitted with circle ring disk lower surface beyond the Great Wall, and groove is respectively provided with circle ring disk and fixed block, and the two ends of back-moving spring are respectively arranged
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 arranges that spring base is located at outside armature and formed between armature while being linked together by fastening bolt from top to bottom
Annular 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 ring of spring base
In shape groove, armature center sets and relief groove is set on pressure compensation opening, bottom plate, and valve element is below hollow structure, valve element
Valve seat on set center pressure stabilizing cavity, pressure compensation opening, relief groove, the hollow space of valve element and center pressure stabilizing cavity are communicated
And constitute seal band is set on inner space, valve element, seal band formation air inlet ring cavity sets outlet annulus on valve seat and led
To block, guide pad is located at around valve element, and outlet annulus is located at below air inlet ring cavity, and gas outlet, dividing plate are set below outlet annulus
Upper setting through hole, the middle part of valve rod passes through through hole, and the top of valve rod is connected with circle ring disk, and the lower section of valve rod passes through jump ring and armature
It is fixed together.
2. fuel gas injection valve is oriented to outside a kind of piezoelectric type of bypass 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 bypass type axial admission according to claim 1 or 2, its feature
It is：Extension is set on valve body, and extension sets and diversion cavity is set in the valve body below air inlet, air inlet, air inlet,
Diversion cavity is communicated and constitutes exterior space, and exterior space is communicated with inner space, and axial admission hole is set on valve element；
Combustion gas vertically flows into diversion cavity through air inlet, and a part of combustion gas is flowed into the center pressure stabilizing cavity of inner space and valve seat,
Remaining combustion gas is flowed into above valve element, and a part of combustion gas stream is through axial air admission hole, full of the air inlet ring cavity on valve element, another part combustion
Gas is flowed into the end pressure stabilizing cavity of valve seat outer end；
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710504654.1A CN107091355B (en) | 2017-06-28 | 2017-06-28 | Bypass type piezoelectric type external guide gas injection valve with axial air inlet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710504654.1A CN107091355B (en) | 2017-06-28 | 2017-06-28 | Bypass type piezoelectric type external guide gas injection valve with axial air inlet |
Publications (2)
| Publication Number | Publication Date |
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| CN107091355A true CN107091355A (en) | 2017-08-25 |
| CN107091355B CN107091355B (en) | 2023-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710504654.1A Active CN107091355B (en) | 2017-06-28 | 2017-06-28 | Bypass type piezoelectric type external guide gas injection valve with axial air inlet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623012A (en) * | 2020-05-28 | 2020-09-04 | 东方红卫星移动通信有限公司 | Novel connector and valve capable of being applied to connector |
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| JP2012072685A (en) * | 2010-09-28 | 2012-04-12 | Diesel United:Kk | Gas injection valve |
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| CN105756811A (en) * | 2016-02-29 | 2016-07-13 | 哈尔滨工程大学 | Combined piezoelectric and pressurizing electromagnetic fuel gas injection device |
| CN206846038U (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 bypass type axial admission |
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| EP1457662A1 (en) * | 2003-03-10 | 2004-09-15 | Robert Bosch Gmbh | Fuel injector |
| JP2012072685A (en) * | 2010-09-28 | 2012-04-12 | Diesel United:Kk | Gas injection valve |
| CN105508082A (en) * | 2015-11-27 | 2016-04-20 | 哈尔滨工程大学 | Pressurized leakage-free electromagnetically-controlled gas injection device |
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| CN111623012A (en) * | 2020-05-28 | 2020-09-04 | 东方红卫星移动通信有限公司 | Novel connector and valve capable of being applied to connector |
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| CN107091355B (en) | 2023-05-30 |
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