CN107143437A - Fuel gas injection valve is oriented to outside a kind of piezoelectric type of the through type with floating valve seat - Google Patents
Fuel gas injection valve is oriented to outside a kind of piezoelectric type of the through type with floating valve seat Download PDFInfo
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- CN107143437A CN107143437A CN201710504594.3A CN201710504594A CN107143437A CN 107143437 A CN107143437 A CN 107143437A CN 201710504594 A CN201710504594 A CN 201710504594A CN 107143437 A CN107143437 A CN 107143437A
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- valve
- valve seat
- gas
- valve element
- armature
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Classifications
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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
- 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
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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)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Fuel-Injection Apparatus (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 the through type with floating valve seat, pass through floating valve seat structure, realization is avoided due to the uneven caused reverse leakage function of fuel gas injection valve external and internal pressure, it is ensured that the reliability of fuel gas injection valve work；Air inlet and water conservancy diversion process are realized by bypass structure and water conservancy diversion cavity configuration；The control of valve element is realized by the control of piezo actuator, air injection function is realized in the control of gas circuit；It is engaged by outer guide frame with pressure compensation opening, relief groove, it is ensured that the perpendicularity of valve element, realizes the steady operation of air-flow, reliably working realizes 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, 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 the fuel gas injection of a kind of fuel gas injection valve, specifically natural gas engine gas system
Valve.
Background technology
Problem of environmental pollution is increasingly serious, and discharge index requires increasingly strict, demand of the in the market to high-power gas machine
Constantly increase.With the use of large-scale gas engine, manufacture, the maintenance and repair of key components and parts turn into restriction gas
The key factor of development of engine, fuel gas injection valve is exactly such a key components and parts.Fuel gas injection valve is gaseous fuel electricity
One of kernel component of multi-point injection gas machine machine containing double fuel is controlled, each cylinder can be achieved and supplies and enter qi leel by stages at regular time and quantity
Layer, its service behaviour has highly important influence to the dynamic property of gas machine or dual fuel engine, emission performance.Injection valve is needed
Will under the bad working environments such as HTHP cumulative activation thousands of hours, and dismantle etc. maintenance work error can be caused progressively to accumulate,
Finally injection valve is caused to be difficult to debug.
In the case where engine operating condition is severe, easily there is the situation of reverse leakage in injection valve.Meanwhile, in order to realize more
Flexible gas puff Z-pinch.Accordingly, it would be desirable to design a kind of injection valve with anti-reverse leakage function and variable lift.Meanwhile, need
Want that Development response speed is fast, control accuracy is high, good reliability big flow fuel gas injection valve, its negotiability is met naturally
Gas engine normal work demand at high load conditions.
The content of the invention
It is an object of the invention to provide fast response time, fuel gas injection it is stable, highly reliable, with anti-reverse leakage work(
Fuel gas injection valve is oriented to outside a kind of piezoelectric type of the through type with floating valve seat of energy.
The object of the present invention is achieved like this：
Fuel gas injection valve is oriented to outside a kind of piezoelectric type of the through type with floating valve seat of the present invention, it is characterized in that：Including valve body,
Floating valve seat, valve rod, piezo-electric crystal, fluid power amplifier, dividing plate, valve element assembly, the inner upper of valve body are fixed with fixed block,
Straight trough is provided with the middle part of fixed block, piezo-electric crystal is arranged in straight trough, is set in the middle part of valve body and set fluid power to amplify above dividing plate, dividing plate
Valve element assembly is set below device, dividing plate, and the fluid power amplifier includes big piston, valve piston, sleeve, and sleeve is arranged on dividing plate
On, the center of sleeve upper end is thick outlet, and the end of sleeve upper end is thin outlet, and big piston is arranged in thick outlet, valve piston
Be arranged in thin outlet, big piston support spring be set between the flange and sleeve of big piston, the flange and sleeve of valve piston it
Between valve piston support spring is set, filled with hydraulic oil in the sleeve below big piston, valve piston, big piston upper surface and piezo crystals
Body lower surface is fit together, and big piston exterior sets circle ring disk, and valve piston upper surface is fitted with circle ring disk lower surface, circle ring disk
With groove is respectively provided with fixed block, the two ends of back-moving spring are arranged in the groove of circle ring disk and fixed block；Described valve
Core assembly includes armature, spring base, bottom plate, valve element, and armature, bottom plate, valve element are arranged simultaneously by fastening bolt from top to bottom
Link together, spring base is located at outside armature and annular groove is formed between armature, and dividing plate lower surface sets annular groove, resets
The two ends of spring are arranged in the annular groove of the annular groove of dividing plate and spring base, and armature center sets pressure compensation opening,
Relief groove is set on bottom plate, and valve element is hollow structure, and pressure compensation opening, relief groove, the hollow space of valve element are communicated,
Seal band and fin are set on valve element, and valve element upper surface is opened up to be provided with axially main air drain, seal band formation ring cavity, fin
Through hole and passage are set respectively on circumferential tonifying Qi hole, dividing plate, and the middle part of valve rod passes through through hole, top and the circle ring disk phase of valve rod
Even, the lower section of valve rod is fixed together by jump ring with armature；The floating valve seat includes guide base, valve seat, guide base
The lower section of valve body is fixed on, valve seat is located at below valve element, guide base inner ring is provided with T-shaped structure, and valve seat outer ring is by setting
The T-shaped structure coordinated with it is arranged in guide base, and the two ends of valve seat back-moving spring are separately fixed on valve seat and valve element, valve
Outlet annulus is set on seat, and outlet annulus is located at below ring cavity, and gas outlet is set below outlet annulus.
The present invention can also include：
The 1st, double anti-gas-leak structure is set between valve seat and guide base, and the first heavy anti-gas-leak structure is in valve seat and led
Installed above to pedestal junction in deformable seal circle, deformable seal circle and install packing washer, the second leakproof again additional along top
Depressed structure is to set two layers of O-ring seal in the T-shaped structure junction of valve seat and guide base, between valve seat and guide base
T-shaped structure junction set elastic washer.
2nd, air inlet is formed between the top of fixed block and valve body, air inlet diversion cavity formed below, diversion cavity passes through logical
Stomata connects dividing plate underlying space；
Gas is vertically flowed into valve body by air inlet, is flowed into along diversion cavity and is full of valve inner, after piezo-electric crystal is powered,
The upward motion of valve element is separated with valve base surface, and gas circuit is opened, and gas valve is opened, and gas is by axially main air drain and circumferential tonifying Qi hole
Mixed admission mode is flowed into, and by ring cavity, is vertically flowed out by gas outlet；Piezo-electric crystal is powered off, between dividing plate and spring base
In the presence of back-moving spring, armature band movable valve plug is moved downward, until spool face is fitted with valve base surface, returns to initial bit
Put, gas circuit is closed, gas valve is closed.
Advantage of the invention is that：The present invention uses the structure with floating valve seat, and it can effectively prevent fuel gas injection valve
There is the situation of reverse leakage and the function with damping, it is ensured that the reliability and safety of fuel gas injection valve work；This hair
It is bright by opening pressure compensation opening at armature center and a number of relief groove being provided with bottom plate, it is to avoid armature is by axle
Xiang Li, makes airline pressure inside and outside at armature be more easy to reach balance, improves armature response speed；The present invention passes through at four of valve element
Circumferential tonifying Qi hole is opened on rib, increases circulation area, valve element quality is reduced, reliability is improved.Set at the circumferential tonifying Qi hole of valve element
The outlet annulus of certain angle, reduces flow losses, increases discharge coefficient.The present invention is using the axially main direct air inlet of air drain and week
To the mixed admission mode of tonifying Qi gas inlet hole, increase charge flow rate coefficient, increase air inflow, while air-flow can be avoided to interfere,
Gas circuit is set to reach balance.It is effectively improved the supply efficiency of engine.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is valve element composite unit structure enlarged drawing of the invention；
Fig. 3 moves towards schematic diagram for the gas circuit of the present invention；
Fig. 4 is valve core structure top view；
Fig. 5 is valve core structure tomograph；
Fig. 6 is floating valve seat schematic enlarged-scale view；
Fig. 7 is floating valve seat force diagram.
Embodiment
Illustrate below in conjunction with the accompanying drawings and the present invention is described in more detail：
It is the overall knot that fuel gas injection valve is oriented to outside piezoelectric type of the through type with floating valve seat of the present invention with reference to Fig. 1-7, Fig. 1
Structure schematic diagram, including valve body 1, piezo actuator 3, valve element assembly 18, floating valve seat 20 4 are most of.Piezo actuator 3 leads to
Square thread is crossed to link together with valve body 1.Be sequentially arranged from top to bottom below piezo actuator 3 valve element assembly 18,
Floating valve seat 20.
Piezo actuator 3 is made up of piezo-electric crystal 2, fluid power amplifier, piezo-electric crystal back-moving spring 4, disk 6, valve rod 9,
Wherein fluid power amplifier is by 8 groups of big piston 5, big piston support spring 13, valve piston 14, valve piston support spring 15 and sleeve
Into fluid power amplifier is arranged in the fuel oil for being covered with certain pressure in the top of dividing plate 17 on valve body 1, sleeve 8, big piston 5, small work
Mating surface between plug 14 and sleeve 8 is equipped with sealing ring 7 and realizes sealing；Piezo-electric crystal 2 and the big piston 5 in fluid power amplifier
Upper surface is in contact, and the two is brought into close contact using big piston support spring 13, and the two is arranged in the circular hole that the center of disk 6 is opened
Interior, the valve piston 14 in fluid power amplifier has been arranged symmetrically four, it is closely pasted with disk 6 using valve piston support spring 15
Close, the both sides of disk 6 are provided with screwed hole, realize and be threadedly coupled with valve rod 9, the lower section of valve rod 9 is fixed on by jump ring 11 with armature 21
Together.
Valve element assembly 18 shown in Fig. 2 it is main by armature 21, spring base 22, fastening bolt 29, pad 27, bottom plate 23,
Valve element 24 is constituted.It is characterized in that：Armature 21, pad 27, bottom plate 23 and valve element 24 are linked together by fastening bolt 29, spring
Seat 22 is arranged on bottom plate 23.It is provided with armature 21 on pressure compensation opening 26, bottom plate 23 and is provided with a number of relief groove
28, it is to avoid armature 21 is made airline pressure inside and outside at armature 21 be more easy to reach balance, improve armature 21 and respond speed by axial force
Degree；Back-moving spring 10 is located between dividing plate 17 and spring base 22.Piezo-electric crystal 2 be powered after, piezo-electric crystal 2 by current excitation from
And extend, big piston 5 is moved downward therewith, and the liquid in the sleeve 8 of fluid power amplifier is compressed, pressure rise, in liquid
In the presence of pressure, the valve piston 14 on fluid power amplifier is moved upwards, upward effect of the disk 6 by four valve pistons 14
Power, together smoothly motion upwards therewith, due to the connection function of screw thread, valve rod 9 is also moved upwards, finally consolidating in jump ring 11
It is set under using, the motion upwards of band movable valve plug assembly 18.In whole motion process, the axial movement of armature 21 with it is circumferentially positioned
The cooperation between 4 guide pads 26 and valve element 24 on valve seat 41 controls to realize, until spring base 22 upper surface with every
The lower surface of plate 17 is in contact, after armature 21 maintains a period of time in the position, and piezo-electric crystal 2 is powered off, and piezo-electric crystal 2 starts contracting
Short, in the presence of big piston support spring 13, big piston 5 begins to return to liquid in the sleeve 8 in initial position, fluid power amplifier
Body pressure declines, and in the presence of back-moving spring 10, disk 6, valve piston 14 start to move downward, valve rod 9, valve element assembly 18
Move downward therewith, until pressure returns to original state in fluid power amplifier, big valve piston returns to initial position, now valve element group
Zoarium 18 is also corresponding to return to initial position, and gas valve is closed.Open 2 circumferential tonifying Qi holes respectively on four ribs 16 of valve element 24
35, response speed is improved, increases circulation area, while can also reduce quality, reliability is improved.Set at circumferential tonifying Qi hole 35
The outlet annulus 19 of certain angle, reduces flow losses, increases discharge coefficient.Using the axially direct air inlet of main air drain 37 and circumference
The mixed admission mode of the air inlet of tonifying Qi hole 35, increases charge flow rate coefficient, increases air inflow, while air-flow can be avoided to interfere,
Gas circuit is set to reach balance.Outlet annulus 19, face sealing, voltage stabilizing balance, and wider annulus are used between valve element 24 and valve seat 41
Area can reduce impact, improve reliability.
As shown in figure 3, gas is vertically flowed into valve body 1 by air inlet 32, flowed into along diversion cavity 33 full of in valve body 1
Portion, after piezo-electric crystal 2 is powered, motion is separated valve element 24 with the surface of valve seat 41 upwards, and now, gas circuit is opened, and gas valve is opened, gas
Body is flowed into by the mixed admission mode in axially main air drain 37 and circumferential tonifying Qi hole 35, by ring cavity 34, is finally hung down by gas outlet 36
Direct current goes out；Piezo-electric crystal 2 is powered off, in the presence of the back-moving spring 10 between dividing plate 17 and spring base 22, and armature 21 is transported downwards
Dynamic, band movable valve plug 24 is moved downward, until the surface of valve element 24 is fitted with the surface of valve seat 41, returns to initial position, gas circuit is closed,
Gas valve is closed.
As shown in fig. 6, in order to prevent combustion gas reverse leakage, improving the reliability and security of fuel gas injection valve, the present invention
Employ the structure of floating valve seat 20.Floating valve seat 20 can lock gas valve when gas valve external pressure height is with air pressure inside
Extremely, it effectively prevent the reverse leakage of combustion gas.Floating valve seat 20 is made up of 7 parts：Guide base 39, valve seat 41 and valve seat
Back-moving spring 45, O-ring seal 40, packing washer 38, deformable seal circle 43, elastic washer 44.Guide base 39 passes through bolt
It is fixed on valve body 1, valve seat 41 is arranged on guide base 39.The inner ring of guide base 39 carries T-shaped structure, with the outer ring of valve seat 41
T-shaped structure be engaged.The two ends of valve seat back-moving spring 45 are separately fixed on valve seat 41 and valve element 24, and keep certain pretension
Power.
In order to prevent gas leakage between valve seat 41 and guide base 39, install double additional between valve seat 41 and guide base 39
Anti-gas-leak structure, the first weight anti-gas-leak structure is the installation deformable seal circle above valve seat 41 and the junction of guide base 39
43, the outer of deformable seal circle 43 is pressed in the mounting groove on guide base 39 and valve body 1, passes through guide base 39 and valve body
Bolt pretightening between 1 is fixed.Packing washer 38 is installed additional along top, valve seat is fixed on by screw 42 in deformable seal circle 43
On 41, packing washer 38 ensures uniform force, strengthens sealing.The material of deformable seal circle 43 uses deformable soft modeling
Material, it is ensured that it does not influence the motion of valve seat 41.Second resealing is installed additional in the T-shaped junction of valve seat 41 and guide base 39
Two layers of O-ring seal 40, further enhances sealing.T-shaped junction between valve seat 41 and guide base 39 has installed one layer additional
Elastic washer 44, reduces vibratory impulse power during contact, serves the effect of damping.Effectively increase the reliable of gas valve
Property.
Valve seat 41 is by combustion gas inside the elastic force F4 of valve seat back-moving spring 45, gas valve the external gas pressure F1 and F2, gas valve
Pressure F3 and the thrust of valve element 24 effect.Valve element 24 is acted on by the elastic force of back-moving spring 10.Air pressure is more than combustion below gas valve
Air valve air pressure inside, gas valve the external gas pressure F1, F2 are respectively acting at the lower section of valve seat 41 and outlet annulus 19, valve seat 41
Lower contact area be much larger than outlet annulus 19, therefore, F1 be much larger than F2, the external gas pressure be expanded to cause valve element 24 to
Before upper motion, the external gas pressure F1, F2 overcome the initial tension of spring of back-moving spring 10, valve seat 41 together with valve element 24 to
Upper motion.Valve seat 41 is moved upwardly until that spring base 14 is in contact with dividing plate 17.Even if now piezo-electric crystal 2 is powered, valve element 24
Also it can not move upwards, gas valve can not be opened.Gas valve is locked.
When gas valve inner and outer air pressure recovers normal, valve seat 41 is moved back down in the presence of valve seat back-moving spring 45
It is in situ.If now piezo-electric crystal 2 is powered, valve element 24 is still remained stationary as, and gas valve is normally-open.Want to press during closing gas valve
Electric crystal 2 is powered off, and valve element 24 is moved downward in the presence of back-moving spring 10, and gas valve is closed.If now piezo-electric crystal 2 is not
It is powered, valve seat 41 moves back down to original position together with valve element 24 in the presence of back-moving spring 10, and gas valve is remained turned-off.Think
When opening gas valve, piezo-electric crystal 2 is powered, and valve element 24 is moved upwards, and gas valve is normally-open.
From the above-mentioned course of work, outer guiding fuel gas injection valve of the through type of the present invention with floating valve seat 20 uses band floating
The structure of dynamic valve seat 20, it can effectively prevent fuel gas injection valve from occurring reversely letting out in the case of injection valve inner and outer air pressure exception
The situation of leakage and the function with damping, it is ensured that the reliability and safety of fuel gas injection valve work；Meanwhile, the present invention passes through
Open pressure compensation opening 26 at the center of armature 21 and a number of relief groove 28 be provided with bottom plate 23, it is to avoid armature 21 by
To axial force, make airline pressure inside and outside at armature 21 be more easy to reach balance, improve the response speed of armature 21；At four of valve element 24
The structure in circumferential tonifying Qi hole 35 is opened on rib 16, increases circulation area, the mass of valve element 24 is reduced, reliability is improved.In valve element 24 weeks
The outlet annulus 19 of certain angle is set to tonifying Qi hole 35, flow losses are reduced, increases discharge coefficient.The present invention is using axially
The direct air inlet of main air drain 37 and the mixed admission mode of the circumferential air inlet of tonifying Qi hole 35, increase charge flow rate coefficient, increase air inflow,
Air-flow can be avoided to interfere simultaneously, gas circuit is reached balance.It is effectively improved the supply efficiency of engine.
Technical scheme：Fuel gas injection valve is oriented to outside a kind of piezoelectric type of the through type with floating valve seat, it is by valve
Body, piezo actuator, valve element assembly, floating valve seat four are most of to be constituted.Piezo actuator passes through square thread thereon and valve body
Link together.Piezo actuator is made up of piezo-electric crystal, fluid power amplifier, piezo-electric crystal back-moving spring, disk, valve rod, its
Middle fluid power amplifier is made up of big piston, big piston support spring, valve piston, valve piston support spring and sleeve, fluid power amplification
Device is arranged in above the dividing plate on valve body, and the fuel oil of certain pressure, matching somebody with somebody between big piston, valve piston and sleeve are covered with sleeve
Conjunction face is equipped with sealing ring and realizes sealing；Piezo-electric crystal is in contact with the big piston upper surface in fluid power amplifier, is lived using big
Plug support spring is brought into close contact the two, and the two is arranged in the circular hole that disc centre is opened, the valve piston in fluid power amplifier
Four have been arranged symmetrically, it is brought into close contact with disk using valve piston support spring, disk both sides are provided with screwed hole, with valve rod
Realize and be fixed together below threaded connection, valve rod by jump ring with armature.The cloth successively from top to bottom below piezo actuator
It is equipped with valve element assembly, floating valve seat.Valve element assembly is main by armature, spring base, fastening bolt, pad, bottom plate, valve element group
Into.It is characterized in that：Armature, pad, bottom plate and valve element are linked together by fastening bolt, and spring base is arranged on bottom plate, bottom
It is provided with plate on a number of relief groove, armature and carries pressure compensation opening.Back-moving spring be located at dividing plate and spring base it
Between.Open a circumferential tonifying Qi hole respectively on four ribs of valve element.Valve element and valve base chamber say compression ring band using three, and face is sealed, surely
Weighing apparatus is flattened, and with wider annulus area.On circumferentially fixed 4 guide pads on valve seat of valve element, it is ensured that its perpendicularity,
Valve element moves up and down spacing by the progress of the distance between spring base and dividing plate.Floating valve seat is answered by guide base, valve seat and valve seat
Position spring, O-ring seal, packing washer, deformable seal circle, elastic washer composition.It is characterized in that：Guide base passes through bolt
It is fixed on valve body, valve seat is arranged on guide base.Guide base inner ring carries T-shaped structure, the T-shaped structure with valve seat outer ring
It is engaged.Valve seat back-moving spring two ends are separately fixed on valve seat and valve element, and keep certain pretightning force.In valve seat and guiding
Double anti-gas-leak structure is installed between pedestal additional, the first heavy anti-gas-leak structure is installed above valve seat and guide base junction
Deformable seal circle, deformable seal circle outer is pressed in the mounting groove on guide base and valve body, by guide base and
Bolt pretightening between valve body is fixed.Packing washer is installed additional along top, be screwed on valve seat in deformable seal circle.
The material of deformable seal circle uses deformable flexible plastic, it is ensured that it does not influence the motion of valve seat.Second resealing is in valve
The T-shaped junction of seat and guide base has installed two layers of O-ring seal additional.
Claims (3)
1. fuel gas injection valve is oriented to outside a kind of piezoelectric type of the through type with floating valve seat, it is characterized in that：Including valve body, float trap
Seat, valve rod, piezo-electric crystal, fluid power amplifier, dividing plate, valve element assembly, the inner upper of valve body are fixed with fixed block, fixed block
Middle part is provided with straight trough, and piezo-electric crystal is arranged in straight trough, is set in the middle part of valve body and fluid power amplifier is set above dividing plate, dividing plate, every
Valve element assembly is set below plate, and the fluid power amplifier includes big piston, valve piston, sleeve, and sleeve is arranged on dividing plate, covers
The center of cylinder upper end is thick outlet, and the end of sleeve upper end is thin outlet, and big piston is arranged in thick outlet, and valve piston is arranged on
In thin outlet, big piston support spring is set between the flange and sleeve of big piston, set between the flange and sleeve of valve piston
Filled with hydraulic oil in sleeve below valve piston support spring, big piston, valve piston, big piston upper surface and piezo-electric crystal following table
Face is fit together, and big piston exterior sets circle ring disk, and valve piston upper surface is fitted with circle ring disk lower surface, circle ring disk and fixation
Groove is respectively provided with block, the two ends of back-moving spring are arranged in the groove of circle ring disk and fixed block；Described valve element combination
Body includes armature, spring base, bottom plate, valve element, and armature, bottom plate, valve element are arranged while being connected to by fastening bolt from top to bottom
Together, spring base is located at outside armature and annular groove is formed between armature, and dividing plate lower surface sets annular groove, back-moving spring
Two ends are arranged in the annular groove of the annular groove of dividing plate and spring base, and armature center is set on pressure compensation opening, bottom plate
Relief groove is set, and valve element is hollow structure, and pressure compensation opening, relief groove, the hollow space of valve element are communicated, on valve element
Seal band and fin are set, and valve element upper surface opens up and is provided with circumferential benefit on axially main air drain, seal band formation ring cavity, fin
Through hole and passage are set respectively on stomata, 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, valve
The lower section of bar is fixed together by jump ring with armature；The floating valve seat includes guide base, valve seat, and guide base is fixed on
The lower section of valve body, valve seat is located at below valve element, and guide base inner ring is provided with T-shaped structure, and valve seat outer ring is matched somebody with somebody by setting with it
The T-shaped structure of conjunction is arranged in guide base, and the two ends of valve seat back-moving spring are separately fixed on valve seat and valve element, are set on valve seat
Outlet annulus is put, outlet annulus is located at below ring cavity, and gas outlet is set below outlet annulus.
2. fuel gas injection valve is oriented to outside a kind of piezoelectric type of the through type with floating valve seat according to claim 1, its feature
It is：Double anti-gas-leak structure is set between valve seat and guide base, and the first heavy anti-gas-leak structure is in valve seat and guide base
Installed above junction in deformable seal circle, deformable seal circle and install packing washer, the second heavy anti-gas-leak structure additional along top
It is that two layers of O-ring seal, the T-shaped knot between valve seat and guide base are set in the T-shaped structure junction of valve seat and guide base
Structure junction sets elastic washer.
3. being oriented to fuel gas injection valve outside a kind of piezoelectric type of the through type with floating valve seat according to claim 1 or 2, it is special
Levying is：Air inlet is formed between the top of fixed block and valve body, air inlet diversion cavity formed below, diversion cavity is connected by passage
Logical dividing plate underlying space；
Gas is vertically flowed into valve body by air inlet, is flowed into along diversion cavity and is full of valve inner, after piezo-electric crystal is powered, valve element
Upward motion is separated with valve base surface, and gas circuit is opened, and gas valve is opened, and gas is by axially main air drain and the mixing in circumferential tonifying Qi hole
Intake method is flowed into, and by ring cavity, is vertically flowed out by gas outlet；Piezo-electric crystal is powered off, the reset between dividing plate and spring base
In the presence of spring, armature band movable valve plug is moved downward, until spool face is fitted with valve base surface, returns to initial position,
Gas circuit is closed, and gas valve is closed.
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| CN201710504594.3A CN107143437B (en) | 2017-06-28 | 2017-06-28 | Straight-through piezoelectric type external guide gas injection valve with floating valve seat |
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| CN107143437B CN107143437B (en) | 2023-06-09 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1431244A (en) * | 1973-06-21 | 1976-04-07 | Atwood Morrill Co | Shut-off valve and pistons |
| CA2780864A1 (en) * | 2012-06-21 | 2012-09-03 | Westport Power Inc. | Fuel injection valve and method of actuating |
| DE102012205564A1 (en) * | 2011-04-05 | 2012-10-11 | Denso Corporation | Fuel injection valve for directly injecting e.g. compressed natural gas into combustion chamber of direct ignition engine, has seal element brought in contact with body-upstream side control structure portion while closing fuel flow chamber |
| SE1250500A1 (en) * | 2012-05-16 | 2013-11-17 | Scania Cv Ab | Valve for a fuel system for an internal combustion engine and a method for controlling a fuel system for an internal combustion engine |
| CN204738888U (en) * | 2015-07-10 | 2015-11-04 | 重庆红江机械有限责任公司 | Gas injection valve for engine |
| CN206816393U (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 with floating valve seat |
-
2017
- 2017-06-28 CN CN201710504594.3A patent/CN107143437B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1431244A (en) * | 1973-06-21 | 1976-04-07 | Atwood Morrill Co | Shut-off valve and pistons |
| DE102012205564A1 (en) * | 2011-04-05 | 2012-10-11 | Denso Corporation | Fuel injection valve for directly injecting e.g. compressed natural gas into combustion chamber of direct ignition engine, has seal element brought in contact with body-upstream side control structure portion while closing fuel flow chamber |
| SE1250500A1 (en) * | 2012-05-16 | 2013-11-17 | Scania Cv Ab | Valve for a fuel system for an internal combustion engine and a method for controlling a fuel system for an internal combustion engine |
| CA2780864A1 (en) * | 2012-06-21 | 2012-09-03 | Westport Power Inc. | Fuel injection valve and method of actuating |
| CN204738888U (en) * | 2015-07-10 | 2015-11-04 | 重庆红江机械有限责任公司 | Gas injection valve for engine |
| CN206816393U (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 with floating valve seat |
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| CN107143437B (en) | 2023-06-09 |
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