CN107165748A - Fuel gas injection valve is oriented to outside a kind of piezoelectric type of through type mixed admission - Google Patents
Fuel gas injection valve is oriented to outside a kind of piezoelectric type of through type mixed admission Download PDFInfo
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- CN107165748A CN107165748A CN201710504645.2A CN201710504645A CN107165748A CN 107165748 A CN107165748 A CN 107165748A CN 201710504645 A CN201710504645 A CN 201710504645A CN 107165748 A CN107165748 A CN 107165748A
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- sleeve
- piezo
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- 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
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- 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
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrically Driven Valve-Operating Means (AREA)
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 mixed 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；By the way of piezo-electric crystal drives, the response speed of fuel gas injection valve is effectively increased, the lift for realizing fuel gas injection valve is variable；By the axially main direct air inlet of air drain and the mixed admission mode of circumferential tonifying Qi gas inlet hole, big flow is realized, the supply efficiency of engine is effectively improved, while air-flow can be avoided to interfere, the stabilization of gas circuit is realized；By valve element and the multiple tracks zonary structure of valve base chamber, the face sealing of fuel gas injection valve, high reliability are realized.
Description
Technical field
The present invention relates to a kind of fuel gas injection valve, specifically natural gas engine gas injection valve.
Background technology
In recent years, the rapid growth consumed with China's oil, oil heavy dependence import.Combustion of natural gas clean and
In China's rich reserves, the fuel of most possible diesel oil substitute is become.In internal combustion engine industry, energy-saving and emission-reduction are used as internal combustion
Machine development inexorable trend, using natural gas as main fuel internal combustion engine ensure dynamic property on the premise of, can significantly drop
Low emission pollution condition, the study hotspot in industry is already turned into using natural gas in recent years for the internal combustion engine of fuel.It is used as day
The fuel supply system of right gas engine, the performance of fuel gas injection valve directly determines the characteristic of natural gas engine.At present,
In the practical work process of fuel gas injection valve, the flexibility of fuel gas injection valve gas puff Z-pinch, the stability for spraying gaseous-pressure
And the characteristic such as control accuracy can be impacted to engine performance, according to the difference of internal-combustion engine rotational speed, the sound of fuel gas injection valve
Typically at several milliseconds between a few tens of milliseconds between seasonable, i.e., fuel gas injection valve need to possess high response speed and be opened rapidly with meeting it
The requirement of pass, at the same time, fuel gas injection valve also need to possess as far as possible big outlet cross-section area, to ensure that it is sufficient that internal combustion engine is obtained
Gas quantity.Therefore, the high big flow combustion of variable lift, stable gas pressure, control accuracy height, fast response time, reliability is developed
Gas jet valve, is the trend of current natural gas engine gas injection valve development.
The content of the invention
It is an object of the invention to provide lift is variable, fast response time, control accuracy are high, reliability is high, whiff pressure
Fuel gas injection valve is oriented to outside a kind of piezoelectric type of stable, efficient sealed, big flow through type mixed admission.
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 mixed 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 compression ring is set out on seal band and fin, seal band formation ring cavity, valve seat
Band and guide pad, guide pad are located at around valve element, and outlet annulus is located at below ring cavity, and gas outlet is set below outlet annulus, every
Through hole and passage are set respectively on plate, and the middle part of valve rod passes through through hole, and the top of valve rod is connected with circle ring disk, the lower section of valve rod
It is fixed together by jump ring with armature, valve element upper surface opens up and circumferential tonifying Qi hole is provided with axially main air drain, fin, and is mending
Diversion angle of cone is set at stomata.
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 valve body are formed between the top of fixed block and valve body
Between form inlet chamber, diversion cavity is formed between valve element assembly and valve body, air inlet, inlet chamber, passage, diversion cavity are communicated
And exterior space is constituted, exterior space is communicated with inner space；
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, is full of
The end pressure stabilizing cavity and the surrounding space of valve element of 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 combustion gas is by axially main air drain and week
Flow into, by ring cavity, finally vertically flowed out by gas outlet to the mixed admission mode in tonifying Qi hole；After piezo-electric crystal power-off, piezoelectricity
Crystal shortens, in the presence of big piston support spring, and big piston returns to hydraulic fluid pressure in initial position, sleeve and declined,
In the presence of back-moving spring, circle ring disk, valve piston are moved downward, and valve rod, valve element assembly are moved downward therewith, until in sleeve
Hydraulic fluid pressure returns to original state, and big piston, valve piston return to initial position, and valve element assembly returns to initial position, valve element
Surface 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, 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；Pass through pressure compensation opening, relief groove and steady
Pressure chamber is engaged, and can effectively be suppressed the fluctuation of gaseous-pressure inside fuel gas injection valve, be realized the steady operation of air-flow, reliable work
Make, realize high response speed；By the axially main direct air inlet of air drain and the mixed admission mode of circumferential tonifying Qi gas inlet hole, realize big
Flow, effectively improves the supply efficiency of engine, while air-flow can be avoided to interfere, realizes the stabilization of gas circuit；Pass through valve element
With the multiple tracks zonary structure of valve base chamber, the face sealing of fuel gas injection valve, high reliability are realized.
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 schematic diagram for the gas circuit of the present invention；
Fig. 4 is valve element three dimensional structure diagram；
Fig. 5 is valve seat construction 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 through type mixed 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,
8 back-moving springs, 9 circle ring disks, 10 valve rods, 11 valve piston support springs, 12 valve pistons, 14 jump rings, 15 dividing plates, the combination of 16 valve elements
Body, 18 O-ring seals and 19 valve seats, fixed block 3 are linked together using threaded connection with valve body 1, its own is fixed on valve body
The center of 1 top, fixed block 3 is provided with the straight trough of certain depth in center, and piezo-electric crystal 2 is arranged therein, straight
The less through hole of a diameter is provided with above groove, for arranging connecting wires for piezo-electric crystal 2 and the outer control unit of valve body 1, piezo crystals
The lower surface of body 2 is in contact with the big upper surface of piston 4, under the pretightning force effect of big piston support spring 5, the following table of piezo-electric crystal 2
Together with face is brought into close contact with the big upper surface of piston 4, the upper end of sleeve 7 is multiple exit, and central outlet is thick outlet, and outlet around is
Thin outlet, is arranged symmetrically in the lower section of circle ring disk 9, and lower end is the closing chamber of a connection, and the lower end of big piston 4 is arranged in sleeve 7
In the thick outlet at center, 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 be overall
Into in sleeve 7, the hydraulic oil 13 with certain pressure is filled with sleeve 7, be disposed with above the thin outlet at the two ends of sleeve 7 small
Piston 12, the lower end of valve piston 12 is arranged therein, and valve piston support spring is disposed between the flange of valve piston 12 and sleeve 7
11, to ensure that valve piston 12 integrally will not enter in sleeve 7, cloth between big piston 4, the side surface of valve piston 12 and the inwall of sleeve 7
Sealing ring 6 is equipped with, to prevent the leakage of hydraulic oil 13 in sleeve 7, big piston 4, valve piston 12, big piston support spring 5, small work
Plug support spring 11 has together constituted with the fluid power amplifier of piezo-electric crystal with sleeve 7, and fluid power amplifier is used as an integral arrangement
In the top of the median septum 15 of valve body 1, under the pretightning force effect of valve piston support spring 11, the upper surface of valve piston 12 and circle ring disk
9 lower surfaces are brought into close contact, and the two ends of back-moving spring 8 are arranged in the groove on fixed block 3 and circle ring disk 9, circle ring disk 9
Two ends are provided with circular hole, hole and are provided with screw thread, and circle ring disk 9 is linked together with valve rod 10 using screw thread, valve rod 10 be arranged in every
In through hole in plate 15, its lower end is fixed together using jump ring 15 with the upper end of valve element assembly 16, and the two ends of dividing plate 15 are also provided with
The passage 35 being relatively large in diameter, has been sequentially arranged valve element assembly 16, valve seat 19 from top to bottom below dividing plate 15, valve seat 19 with
It is bolted to connection between valve body 1 together, mating surface therebetween realizes sealing by O-ring seal 18.
As shown in Fig. 2 outside a kind of piezoelectric type of through type mixed admission be oriented to fuel gas injection valve valve element assembly 16 by
Armature 21, spring base 22, bottom plate 23, valve element 24, armature back-moving spring 28, pad 29 and fastening bolt 31 are constituted, and armature 21 leads to
Cross fastening bolt 31 to link together with bottom plate 23, valve element 24, one layer of pad 29, armature are disposed between armature 21 and bottom plate 23
Pressure compensation opening 27 is provided with 21, the top of bottom plate 23 is provided with four relief grooves 30, the pressure compensation opening of the center of armature 21
27 coordinate the relief groove on bottom plates 23 to make 30 to obtain the inner space of valve element assembly 16 connects with exterior space, and inside and outside gas circuit reaches
To balance, the inside and outside combustion gas no pressure of valve element assembly 16 is poor, it is to avoid by extra axial force, spring base during from motion
22 are arranged on the top of bottom plate 23, and its internal side surface is in contact with the side surface of armature 21, and the two of armature back-moving spring 28
End is arranged in dividing plate 15 and on the annular groove of spring base 22, valve element 24 is by 26 groups of valve element main body, fin 25 and seal band
Into on its circumferentially fixed four guide pad 17 on valve seat 19, it is ensured that itself perpendicularity, the motion of valve element 24 lift passes through spring
Seat 22 and the progress of the distance between dividing plate 15 are spacing, and the integral arrangement of valve element assembly 16 is below dividing plate 15；
As shown in figure 3, first, combustion gas is vertically flowed into valve body 1 via air inlet 33, along the perpendicular flow of inlet chamber 34,
Until the passage 35 at the two ends of 1 upper spacer of valve body 15 is flowed through, due to the pressure on the upper pressure balance hole 27 of armature 21 and bottom plate 23
The presence of compensating groove 30, the inner space of valve element assembly 16 is connected with space in valve body 1, and a part of combustion gas can be flowed into valve element group
Fit 16 inner spaces, are filled with the pressure stabilizing cavity 38 of the inner space of valve element assembly 16 and the center of valve seat 19 immediately, it is ensured that
Gas circuit balance no pressure is poor inside and outside valve element assembly 16, it is to avoid it is by extra axial force；Remaining combustion gas is along diversion cavity 36
Flow into full of the pressure stabilizing cavity 38 inside valve body 1, being filled with the periphery of valve seat 19 and the surrounding space of valve element 24.Piezo-electric crystal 2
When being not powered on, the lower surface of valve element 24 is fitted with the upper surface of valve seat 19, and the ring cavity between valve element 24 and valve seat 19 is not connected；Piezo crystals
After body 2 is powered, piezo-electric crystal 2 extends, the motion, the following table of valve element 24 upwards of band movable valve plug assembly 16 after amplifying through fluid power amplifier
Emaciated face is from the upper surface of valve seat 19, now, and gas circuit is opened, combustion gas being mixed into by axially main air drain 41 and circumferential tonifying Qi hole 37 rapidly
Gas mode is flowed into, by multiple tracks ring cavity 39 between valve element 24 and valve seat 19, finally vertically flowed out by gas outlet 40, and valve element 24 is lifted
Break-make between ring cavity 39 is controlled with taking a seat.
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 16 remains motionless in initial position, and the seal band 26 on valve element 24 in valve element assembly 16 is upper with valve seat 19
Outlet annulus 20 is fitted close, and the ring cavity 39 between valve element 24 and valve seat 19 is not connected, in valve body 1 of the combustion gas full of fuel gas injection valve
The whole space in portion.After piezo-electric crystal 2 is powered, piezo-electric crystal 2, so as to extend, is promoted big piston 4 to transport downwards by current excitation
Dynamic, the hydraulic oil 13 in sleeve 7 is compressed, pressure rise, in the presence of the pressure of hydraulic oil 13, in sleeve 7 in thin outlet
Valve piston 12 move upwards, valve piston 12 is symmetrically distributed in the lower section of circle ring disk 9, smoothly promotes circle ring disk 9 to move upwards,
Due to the connection function of screw thread, the also motion upwards of valve rod 10, finally under the fixation of jump ring 15, band movable valve plug assembly 16
Motion, in the motion process of valve element assembly 16, outer guiding is realized by guide pad 17, the hydraulic pressure in sleeve 7 upwards
Oily 13 pressure return to original state, and valve piston 12 is no longer moved, and valve element assembly 16 stops therewith, and valve element assembly 16 is in the position
Maintenance a period of time is put, during this, combustion gas is rapidly by the mixed admission mode stream in axially main air drain 41 and circumferential tonifying Qi hole 37
Enter, by the multiple tracks ring cavity 39 between valve element 24 and valve seat 19, vertically flowed out after being finally oriented to via gas outlet 40, valve element 24 and valve
Multiple tracks annulus between seat 19, face sealing, voltage stabilizing balance, and wider annulus area can reduce impact, improve reliability, valve seat
Pressure stabilizing cavity 38 is provided with 19 centers and periphery so that the combustion gas of surrounding is ventilated uniformly in flow process, 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, greatly
Piston 4 begins to return in initial position, sleeve 7 pressure of hydraulic oil 13 and declined, in the presence of back-moving spring 8, circle ring disk 9, small
Piston 12 starts to move downward, and valve rod 10, valve element assembly 16 are moved downward therewith, until the pressure of hydraulic oil 13 is returned in sleeve 7
To original state, big piston 4, valve piston 12 return to initial position, and now valve element assembly 16 is also corresponding returns to initial position,
The lower surface of valve element 24 is fitted with the upper surface of valve seat 19, comes 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 valve is oriented to outside a kind of piezoelectric type of through type mixed admission of the invention,
In the course of the work, it is powered and is extended using piezo-electric crystal 2, after fluid power amplifier displacement enlargement, the valve piston being arranged symmetrically
12 promote the smoothly motion upwards of circle ring disk 9, and circle ring disk 9 is by valve rod 10 with the overall guiding in outside of movable valve plug assembly 16
Lifted off a seat under the outer guide effect of block 17 19 motions, realize the function of gas valve jet；The present invention is driven using piezo-electric crystal 2
Mode, effectively increase the response speed of fuel gas injection valve, the lift for realizing fuel gas injection valve is variable；The present invention is using straight
Logical plenum system, it is ensured that the sufficient supply of the combustion gas entered in valve body 1；The vertical of valve element 24 is ensured by outer guide frame
Degree；By opening pressure compensation opening 27 at the center of armature 21 and a number of relief groove 30 being provided with bottom plate 23, make valve
Airline pressure is more easy to reach balance inside and outside at core assembly 16, it is to avoid valve element assembly 16 is improved its response speed by axial force
Degree, reduction control difficulty；The structure in multiple circumferential tonifying Qi holes 37, the lower surface of valve element 24 and valve seat are opened on the fin 25 of valve element 24
19 upper surfaces are provided with multiple tracks ring cavity 39, increase valid circulation area, reduce the mass of valve element 24, improve reliability；In valve element 24 weeks
The diversion angle of cone 32 of certain angle is set to tonifying Qi hole 37, flow losses are reduced, increases discharge coefficient；The present invention is using axially
The direct air inlet of main air drain 41 and the mixed admission mode of the circumferential air inlet of tonifying Qi hole 37, increase charge flow rate coefficient, realize big flow,
The supply efficiency of fuel gas injection valve is effectively improved, while air-flow can be avoided to interfere, balancing, stably for gas circuit is realized；Valve
Multiple-sealed annulus 26 and the structure of outlet annulus 20 are used between core 24 and valve seat 19, the face sealing of fuel gas injection valve, voltage stabilizing is realized
Balance, and wider annulus area can reduce impact, improve reliability；Pressure stabilizing cavity is respectively provided with the center of valve seat 19 and periphery
38, it can effectively suppress the fluctuation of gaseous-pressure inside fuel gas injection valve, realize the steady operation of air-flow, reliably working is realized
High response speed.
Technical scheme：Be oriented to fuel gas injection valve outside a kind of piezoelectric type of through type mixed admission, it mainly by
Valve body, piezo-electric crystal, fixed block, big piston, big piston support spring, sealing ring, sleeve, back-moving spring, circle ring disk, valve rod,
Valve piston support spring, valve piston, jump ring, dividing plate, valve element assembly, O-ring seal and valve seat composition.Fixed block utilizes screw thread
Connection links together with valve body, its own is fixed on the center above valve body, fixed block is provided with one in center
The straight trough of depthkeeping degree, piezo-electric crystal is arranged therein, and the less through hole of a diameter is provided with above straight trough, for arranging piezo crystals
Body is connected wires with valve body outer control unit, and piezo-electric crystal lower surface is in contact with big piston upper surface, and bullet is supported in big piston
Under the pretightning force effect of spring, together with piezo-electric crystal lower surface is brought into close contact with big piston upper surface, sleeve upper end is multiple exit,
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 of a connection
Chamber, the lower end of big piston is arranged in the thick outlet of bushing core, big piston support spring be located at big plunger flange and sleeve it
Between, it is ensured that big piston integrally will not enter in sleeve, be filled with the hydraulic oil with certain pressure in sleeve, sleeve two ends it is thin
Outlet top is disposed with valve piston, and valve piston lower end is arranged therein, and valve piston is disposed between valve piston flange and sleeve
Support spring, to ensure that valve piston integrally will not enter in sleeve, is arranged between big piston, valve piston side surface and sleeve lining
There is sealing ring, to prevent the leakage of hydraulic oil in sleeve, big piston, valve piston, big piston support spring, valve piston support spring
The fluid power amplifier of piezo-electric crystal is together constituted with sleeve, fluid power amplifier is as an integral arrangement in valve body median septum
Top, under the pretightning force effect of valve piston support spring, valve piston upper surface is brought into close contact with circle ring disk lower surface, resets bullet
The two ends of spring are arranged in fixed block and in the groove on circle ring disk, the two ends of circle ring disk, which are provided with circular hole, hole, is provided with screw thread,
Circle ring disk is linked together with valve rod using screw thread, valve rod is arranged in the through hole in dividing plate, its lower end utilizes jump ring and valve
Core assembly upper end is fixed together, and dividing plate two ends are also provided with the passage being relatively large in diameter, below dividing plate from top to bottom successively
Be disposed with valve element assembly, valve seat, be bolted to connection between valve seat and valve body together with, mating surface therebetween is led to
Cross O-ring seal to realize sealing, foregoing valve element assembly is by armature, spring base, bottom plate, valve element, armature back-moving spring, pad
Piece and fastening bolt composition, armature are linked together by fastening bolt with bottom plate, valve element, and one is disposed between armature and bottom plate
It is provided with layer pad, armature above pressure compensation opening, bottom plate and is provided with four relief grooves, the pressure compensation opening of armature center
Coordinate the relief groove on bottom plate that valve element assembly inner space is connected with exterior space, inside and outside gas circuit reaches balance,
The inside and outside combustion gas no pressure of valve element assembly is poor, it is to avoid by extra axial force during from motion, spring base is arranged on bottom
The top of 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 in dividing plate
With on the annular groove of spring base, valve element is made up of valve element main body, fin, seal band, its circumferentially fixed four on valve seat
On guide pad, it is ensured that itself perpendicularity, valve core movement lift carries out spacing, valve element group by the distance between spring base and dividing plate
Fit integral arrangement is below dividing plate；Circumferential tonifying Qi hole is opened on the fin of valve element and diversion angle of cone, valve are set at tonifying Qi hole
Seal band and outlet annulus, face sealing, voltage stabilizing balance are used between core and valve seat, and there is wider annulus area,
Pressure stabilizing cavity is provided with valve seat center and periphery, the pressure stabilizing cavity of valve seat center and the combustion gas inside valve element assembly are empty
Between be connected, and valve seat periphery at pressure stabilizing cavity be connected with the diversion cavity in valve body.When piezo-electric crystal is not powered on, valve element following table
Face is fitted with valve seat upper surface, and valve element is not connected with the ring cavity of valve base chamber；After piezo-electric crystal is powered, piezo-electric crystal elongation, warp
Band movable valve plug assembly is moved upwards after the amplification of fluid power amplifier, and valve element lower surface departs from valve seat upper surface, now valve element and valve
Ring cavity between seat is connected, the break-make controlled between ring cavity of lifting and take a seat of valve element.
Claims (3)
1. fuel gas injection valve is oriented to outside a kind of piezoelectric type of through type mixed 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 and fin, seal band formation ring cavity, valve seat
Block, guide pad is located at around valve element, and outlet annulus is located at below ring cavity, is set below outlet annulus on gas outlet, dividing plate respectively
Through hole and passage are set, 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 jump ring
It is fixed together with armature, valve element upper surface opens up and is provided with circumferential tonifying Qi hole on axially main air drain, fin, and is set at tonifying Qi hole
Put diversion angle of cone.
2. fuel gas injection valve is oriented to outside a kind of piezoelectric type of through type mixed 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 mixed admission according to claim 1 or 2, its feature
It is：Air inlet, shape between the middle and lower part of fixed block and fluid power amplifier and valve body are formed between the top of fixed block and valve body
Into inlet chamber, diversion cavity is formed between valve element assembly and valve body, air inlet, inlet chamber, passage, diversion cavity are communicated and constituted
Exterior space, exterior space is communicated with inner space；
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
Valve element assembly inner space and valve seat center pressure stabilizing cavity are flowed into, remaining combustion gas continues to flow along diversion cavity, full of valve seat
The end pressure stabilizing cavity and the surrounding space of valve element of 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, and combustion gas is by axially main air drain and circumferential benefit
The mixed admission mode of stomata is flowed into, and by ring cavity, is finally vertically flowed out by gas outlet；After piezo-electric crystal power-off, piezo-electric crystal
Shorten, in the presence of big piston support spring, big piston returns to hydraulic fluid pressure in initial position, sleeve and declined, and is resetting
In the presence of spring, circle ring disk, valve piston are moved downward, and valve rod, valve element assembly are moved downward therewith, until hydraulic pressure in sleeve
Oil pressure returns to original state, and big piston, valve piston return to initial position, and valve element assembly returns to initial position, spool face
Fitted with valve base surface, fuel gas injection valve is closed, gas circuit is closed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710504645.2A CN107165748B (en) | 2017-06-28 | 2017-06-28 | Piezoelectric type external guiding gas injection valve for straight-through type mixed air inlet |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710504645.2A CN107165748B (en) | 2017-06-28 | 2017-06-28 | Piezoelectric type external guiding gas injection valve for straight-through type mixed air inlet |
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| CN107165748B CN107165748B (en) | 2023-06-09 |
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Citations (4)
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|---|---|---|---|---|
| CN1818370A (en) * | 2006-01-26 | 2006-08-16 | 侯德洋 | Composite microdisplacement oil jetter of IC engine with piezoelectric control |
| EP1884655A1 (en) * | 1999-10-15 | 2008-02-06 | Westport Power Inc. | Directly actuated injection valve |
| CN106121867A (en) * | 2016-08-31 | 2016-11-16 | 重庆红江机械有限责任公司 | A kind of gaseous propellant engine fuel gas electric spray valve |
| CN206816401U (en) * | 2017-06-28 | 2017-12-29 | 哈尔滨工程大学 | Fuel gas injection valve is oriented to outside a kind of piezoelectric type of through type mixed admission |
-
2017
- 2017-06-28 CN CN201710504645.2A patent/CN107165748B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1884655A1 (en) * | 1999-10-15 | 2008-02-06 | Westport Power Inc. | Directly actuated injection valve |
| CN1818370A (en) * | 2006-01-26 | 2006-08-16 | 侯德洋 | Composite microdisplacement oil jetter of IC engine with piezoelectric control |
| CN106121867A (en) * | 2016-08-31 | 2016-11-16 | 重庆红江机械有限责任公司 | A kind of gaseous propellant engine fuel gas electric spray valve |
| CN206816401U (en) * | 2017-06-28 | 2017-12-29 | 哈尔滨工程大学 | Fuel gas injection valve is oriented to outside a kind of piezoelectric type of through type mixed admission |
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