CN206816390U - Fuel gas injection valve is oriented to outside a kind of piezoelectric type of bypass type with floating valve seat - Google Patents
Fuel gas injection valve is oriented to outside a kind of piezoelectric type of bypass type with floating valve seat Download PDFInfo
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- CN206816390U CN206816390U CN201720760714.1U CN201720760714U CN206816390U CN 206816390 U CN206816390 U CN 206816390U CN 201720760714 U CN201720760714 U CN 201720760714U CN 206816390 U CN206816390 U CN 206816390U
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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
Abstract
The purpose of this utility model, which is to provide outside a kind of piezoelectric type of bypass type with floating valve seat, is oriented to fuel gas injection valve, pass through floating valve seat structure, avoid, due to reverse leakage caused by fuel gas injection valve external and internal pressure imbalance, ensure that the reliability of fuel gas injection valve work；Air inlet and water conservancy diversion process are realized by by-pass structure and water conservancy diversion cavity configuration；The control of valve element is realized by the control of piezo actuator, the control of gas circuit, realizes the function of gas valve jet；It is engaged by outer guide frame with pressure compensation opening, relief groove, ensures the perpendicularity of valve element, realize the steady operation of air-flow, reliably working, realize high response speed；By the axially mixed admission mode of the main direct air inlet of air drain and circumferential tonifying Qi gas inlet hole, big flow is realized, effectively improves the supply efficiency of engine, while air-flow can be avoided to interfere, realize the stabilization of gas circuit；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 utility model relates to a kind of fuel gas injection valve, specifically natural gas engine gas injection valve.
Background technology
In recent years, with the rapid growth that China's oil consumes, 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.Natural gas engine is especially made as ship power
There is good application prospect for the thrust power of riverboat.As the fuel supply system of natural gas engine, fuel gas injection
The performance of valve directly determines the economy and discharge performance of natural gas engine.At present, natural gas engine is in full working scope state
Lower work has the insufficient situation of gas quantity often, causes the rotary speed unstabilization phenomenon during operation of engine full working scope, in big work(
Can be more serious on rate engine, this drastically influence the normal use of engine and the performance of engine.In engine operating condition
In the case of severe, easily there is the situation of reverse leakage in injection valve.Meanwhile in order to realize more flexible gas puff Z-pinch.Therefore,
Need to design a kind of injection valve with anti-reverse leakage function and variable lift.Simultaneously, it is necessary to which Development response speed is fast, controls
Precision is high, the big flow fuel gas injection valve of good reliability, enables its negotiability to meet natural gas engine in higher load condition
Lower normal work demand.
The content of the invention
The purpose of this utility model is to provide fast response time, control accuracy height, reliability height, stable gas pressure, efficiently
Sealing, big flow, piezoelectric type of a kind of bypass type with floating valve seat with anti-reverse leakage function are oriented to fuel gas injection valve outside.
What the purpose of this utility model was realized in：
Fuel gas injection valve is oriented to outside a kind of piezoelectric type of the bypass type of the utility model with floating valve seat, it is characterized in that：Including
Valve body, floating valve seat, valve rod, piezo-electric crystal, fluid power amplifier, dividing plate, valve element assembly, fixed block is fixed with valve body, Gu
Determine to be provided with straight trough in the middle part of block, piezo-electric crystal is arranged in straight trough, and dividing plate is set in the middle part of valve body, sets fluid power to amplify above dividing plate
Device, dividing plate lower section set valve element assembly, 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, big piston upper surface and piezo crystals in the sleeve below big piston, valve piston
Body lower surface is fit together, and big piston exterior sets circle ring disk, and valve piston upper surface is bonded with circle ring disk lower surface, circle ring disk
With groove is respectively provided with fixed block, the both 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 while pass through 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 both ends of spring are arranged in the annular groove of dividing plate and the annular groove of spring base, and pressure compensation opening is set at armature center,
Relief groove is set on bottom plate, valve element is hollow structure, and pressure compensation opening, relief groove, the hollow space of valve element communicate,
Seal band and fin are set on valve element, and valve element upper surface opens up axially main air drain, and seal band forms ring cavity, is provided with fin
Circumferential tonifying Qi hole, through hole and passage are set respectively on dividing plate, 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 and armature；The floating valve seat includes guide base, valve seat, guide base
It is fixed in 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 passes through setting and its
The T-shaped structure of cooperation is arranged in guide base, and the both ends of valve seat back-moving spring are separately fixed on valve seat and valve element, on valve seat
Outlet annulus is set, and outlet annulus is located at below ring cavity, and gas outlet is set below outlet annulus.
The utility model can also include：
The 1st, double anti-gas-leak structure is set between valve seat and guide base, the first heavy anti-gas-leak structure is in valve seat and led
Installation deformable seal circle above to pedestal junction, deformable seal circle interior edge top install packing washer, the second leakproof again additional
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.
The 2nd, air inlet is set on valve body, air inlet is located at the outwardly directed part of valve body, air inlet diversion cavity formed below,
Air inlet, diversion cavity communicate；
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,
By current excitation so as to extend, big piston moves downward piezo-electric crystal therewith, hydraulic fluid pressure rise, on fluid power amplifier
Valve piston moves upwards, and circle ring disk band ovable valve stem also moves upwards, and under the fixation of jump ring, band movable valve plug assembly is upward
Motion, gas circuit are opened, and gas valve is opened, and gas is flowed into by the axially mixed admission mode in main air drain and circumferential tonifying Qi hole, is passed through
Ring cavity, vertically flowed out by gas outlet；After piezo-electric crystal power-off, piezo-electric crystal shortens, in the presence of big piston support spring, greatly
Piston returns to initial position, and hydraulic fluid pressure declines, and in the presence of master reset spring, circle ring disk, valve piston move downward, valve
Bar, valve element assembly move downward therewith, until pressure returns to original state in fluid power amplifier, big piston, valve piston return to
Initial position, valve element assembly return to initial position, and gas valve is closed.
Advantage of the present utility model is：The utility model uses the structure with floating valve seat, and it can effectively prevent from firing
There is the situation of reverse leakage and the function with damping in gas jet valve, ensure that the reliability and safety of fuel gas injection valve work
Property；Air inlet and water conservancy diversion process are realized by by-pass structure and water conservancy diversion cavity configuration；Valve element is realized by the control of piezo actuator
Control, the control of gas circuit, realize the function of gas valve jet；Pass through outer guide frame and pressure compensation opening, relief groove phase
Coordinate, ensure the perpendicularity of valve element, can effectively suppress the fluctuation of gaseous-pressure inside fuel gas injection valve, realize the stabilization of air-flow
Work, reliably working, realizes high response speed；Pass through the axially direct air inlet of main air drain and the mixed admission of circumferential tonifying Qi gas inlet hole
Mode, big flow is realized, effectively improve the supply efficiency of engine, while air-flow can be avoided to interfere, realize the steady of gas circuit
It is fixed；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.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is valve element composite unit structure schematic diagram of the present utility model；
Fig. 3 is that gas circuit of the present utility model moves towards schematic diagram；
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 utility model is described in more detail：
With reference to Fig. 1-7, Fig. 1 is that the whole of fuel gas injection valve is oriented to outside piezoelectric type of the utility model bypass type with floating valve seat
Body structural representation, mainly by piezo actuator 3, master reset spring 11, auxiliary back-moving spring 4, valve element assembly 18, the and of valve body 1
Floating valve seat 20 forms.Piezo actuator 3 is fixed on valve body 1 by fixing bolt 12, below piezo actuator 3 from upper and
Under be sequentially arranged valve element assembly 18, floating valve seat 20.
As shown in Fig. 2 the valve element assembly 18 of fuel gas injection valve is oriented to outside a kind of piezoelectric type of bypass type with floating valve seat
Mainly it is made up of armature 21, spring base 22, fastening bolt 29, pad 27, bottom plate 23 and valve element 24, armature 21 passes through fastening bolt
29 are linked together with bottom plate 23, valve element 24, and one layer of pad 27 is disposed between armature 21 and bottom plate 23, and spring base 22 is arranged on
The top of bottom plate 23, its internal side surface are in contact with the side surface of armature 21, and the both ends of master reset spring 11 are located at respectively
In the annular groove of dividing plate 17 and spring base 22, the center of armature 11 is provided with pressure compensation opening 26, is provided with bottom plate 23 a number of
Relief groove 28, armature 21 is avoided to be made airline pressure inside and outside at armature 21 be more easy to reach balance by axial force, improve armature
21 response speeds.Pressure compensation opening 26 at the center of armature 11 coordinates the relief groove 28 on bottom plate 23 to cause valve element assembly
18 inner spaces connect with exterior space, and inside and outside gas circuit reaches balance, and the inside and outside combustion gas no pressure of valve element assembly 18 is poor, avoids
It is made up of during from motion by extra axial force, valve element 24 valve element main body, fin 31 and seal band 25.Valve element combines
The integral arrangement of body 18 is below piezo actuator.
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 top of dividing plate 17 on valve body 1, and the fuel oil of certain pressure, big piston 5, small work are covered with sleeve 8
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 is brought into close contact the two using big piston support spring 13, 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 are threadedly coupled with valve rod 9, and the lower section of valve rod 9 is fixed on by jump ring 10 and armature 21
Together.
As shown in figure 3, first, combustion gas is vertically flowed into valve body 1 by air inlet 32, flowed into along air inlet 25 and be full of valve body
Inside 1.In the fuel gas injection valve course of work, when piezo-electric crystal 2 is not powered on, under the pretightning force effect of master reset spring 11,
Valve element assembly 18 maintains motionless, the lower surface of the seal band 25 of the valve element 24 in valve element assembly 18 and valve in initial position
The upper surface of the outlet annulus 19 of seat 41 is brought into close contact, and now outlet annulus 19 is not yet connected with the inner space of valve body 1, and combustion gas is filled
Whole space inside the valve body 1 of full fuel gas injection valve.After piezo-electric crystal 2 is powered, piezo-electric crystal 2 is by current excitation so as to stretching
Long, big piston 5 is moved downward therewith, and the liquid in the sleeve 8 of fluid power amplifier is compressed, pressure rise, in fluid pressure
In the presence of, the valve piston 14 on fluid power amplifier moves upwards, disk 6 by four valve pistons 14 upward active force, with
Together smoothly motion upwards, due to the connection function of screw thread, the also motion upwards of valve rod 9, finally make in the fixed of jump ring 10
Under, band movable valve plug assembly 4 moves upwards.In whole motion process, the axial movement of armature 8 with it is circumferentially positioned by valve seat
The cooperation between 4 guide pads 21 and valve element 24 on 41 is realized to control.Now, gas circuit is opened, and gas valve is opened, and gas is fast
Speed is flowed into by the axially mixed admission mode in main air drain 37 and circumferential tonifying Qi hole 35, by multiple tracks ring cavity 34, finally by gas outlet
36 vertical outflows；Piezo-electric crystal 2 powers off, and piezo-electric crystal 2 starts to shorten, in the presence of big piston support spring 13, big piston 5
Beginning to return to initial position, fluid pressure declines in the sleeve 8 in fluid power amplifier, in the presence of master reset spring 11, circle
Disk 6, valve piston 14 start to move downward, and valve rod 9, valve element assembly 4 move downward therewith, until pressure is returned in fluid power amplifier
To original state, big valve piston returns to initial position, and now valve element assembly 4 is also corresponding returns to initial position, and gas valve closes
Close.
As shown in fig. 6, in order to prevent combustion gas reverse leakage, the reliability and security of fuel gas injection valve, this practicality are improved
It is new to employ the structure of floating valve seat 20.Floating valve seat 20 can be when gas valve external pressure height be with air pressure inside by gas valve
It is locked, 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, valve seat
Back-moving spring 45, O-ring seal 40, packing washer 38, deformable seal circle 43, elastic washer 44.Guide base 39 and valve body 1
It is integral structure, 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 both 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, installed additional between valve seat 41 and guide base 39 double
Anti-gas-leak structure, the first weight anti-gas-leak structure are the installation deformable seal circles above valve seat 41 and the junction of guide base 39
43, install packing washer 38 in deformable seal circle 43 above outer additional, be fixed on by screw 42 on valve seat 41, packing washer
38 ensure uniform force, strengthen sealing.The material of deformable seal circle 43 uses deformable flexible plastic, ensures that it does not influence
The motion of valve seat 41.Second resealing is to have installed two layers of O-ring seal 40 additional in the T-shaped junction of valve seat 41 and guide base 39,
Further enhance sealing.T-shaped junction between valve seat 41 and guide base 39 has installed one layer of elastic washer 44 additional, reduces
Vibratory impulse power during contact, serves the effect of damping.Effectively increase the reliability of gas valve.
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 back-moving spring elastic force.Air pressure is more than combustion gas below gas valve
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, under valve seat 41
Square contact area is much larger than outlet annulus 19, and therefore, F1 is much larger than F2, and being expanded in the external gas pressure causes valve element 24 upward
Before motion, the external gas pressure F1, F2 overcome the initial tension of spring of back-moving spring 7, and valve seat 41 is upward together with valve element 24
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
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 moves 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 still remains 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 moves downward in the presence of back-moving spring 7, 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 7, and gas valve remains turned-off.Think
When opening gas valve, piezo-electric crystal 2 is powered, and valve element 24 moves upwards, and gas valve is normally-open.
From the above-mentioned course of work, fuel gas injection valve is oriented to outside piezoelectric type of the utility model bypass type with floating valve seat
Using the structure with floating valve seat 20, it effectively can prevent fuel gas injection valve from going out in the case of injection valve inner and outer air pressure exception
The situation of existing reverse leakage and the function with damping, ensure that the reliability and safety of fuel gas injection valve work；Pass through side
Logical structure and the structure of air inlet 25 realize air inlet and water conservancy diversion process；The control of valve element 24, gas circuit are realized by the control of actuator
Control, realize air injection function；Ensure the perpendicularity of valve element 24 by outer guide frame；Put down by opening pressure at the center of armature 21
Weighing apparatus hole 26 is simultaneously provided with a number of relief groove 28 on bottom plate 23, avoids armature 21 from being made by axial force at armature 21
Inside and outside airline pressure is more easy to reach balance, improves the response speed of armature 21；Multiple circumferential tonifying Qi holes 35 are opened on the rib of valve element 24
Structure, the lower surface of valve element 24 and the upper surface of valve seat 41 be provided with multiple tracks ring cavity 34, increase valid circulation area, reduces the He of valve element 24
The quality of valve seat 41, improve reliability；The diversion angle of cone 30 of certain angle is set at the circumferential tonifying Qi hole 35 of valve element 24, reduces stream
Dynamic loss, increases discharge coefficient；The utility model is mixed using axially main 37 direct air inlet of air drain and the circumferential air inlet of tonifying Qi hole 35
Intake method is closed, increases charge flow rate coefficient, realizes big flow, be effectively improved the supply efficiency of fuel gas injection valve, simultaneously
Air-flow can be avoided to interfere, realize balancing, stably for gas circuit；Multiple-sealed annulus 25 and outlet are used between valve element 24 and valve seat 41
The structure of annulus 19, the face sealing of fuel gas injection valve, voltage stabilizing balance are realized, and wider annulus area can reduce impact, improve
Reliability.
The technical solution of the utility model：Fuel gas injection valve is oriented to outside a kind of piezoelectric type of bypass type with floating valve seat, it
Mainly it is made up of piezo actuator, back-moving spring, valve element assembly, valve body and floating valve seat.Piezo actuator by piezo-electric crystal,
Fluid power amplifier, back-moving spring, disk, valve rod composition, wherein fluid power amplifier is by big piston, big piston support spring, small work
Plug, valve piston support spring and sleeve composition, fluid power amplifier are arranged in above the dividing plate on valve body, are covered with a level pressure in sleeve
The fuel oil of power, the mating surface between big piston, valve piston and sleeve are equipped with sealing ring 7 and realize sealing；Piezo-electric crystal and fluid power
Big piston upper surface in amplifier is in contact, and is brought into close contact the two using big piston support spring, the two is arranged in disk
In the circular hole that center is opened, the valve piston in fluid power amplifier has been arranged symmetrically four, using valve piston support spring make its with
Disk is brought into close contact, and disk both sides are provided with screwed hole, is realized and is threadedly coupled with valve rod, is fixed below valve rod by jump ring and armature
Together.Piezo actuator is fixed on valve body by fixing bolt, has been sequentially arranged from top to bottom below piezo actuator
Valve element assembly, floating valve seat.Valve element assembly is by armature, spring base, pad, bottom plate, jump ring, fastening bolt and valve element group
Into armature is linked together by fastening bolt and bottom plate, valve element, and one layer of pad, spring base are disposed between armature and bottom plate
Installed in the top of bottom plate, its internal side surface is in contact with the side surface of armature, the both ends of back-moving spring be located at respectively every
In the annular groove of plate and spring base, armature center is provided with pressure compensation opening, and a number of relief groove is provided with bottom plate.Valve
Core is made up of valve element main body, fin, seal band, and valve element assembly integral arrangement is below piezo actuator, in the rib of valve element
Circumferential tonifying Qi hole is opened on piece and diversion angle of cone is set at circumferential tonifying Qi hole, between valve element and floating valve seat using seal band and
Outlet annulus, face sealing, voltage stabilizing balance, and there is wider annulus area.Circumferentially fixed 4 guiding on valve seat of valve element
On block, ensure 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 by being oriented to
Pedestal, valve seat and valve seat back-moving spring, O-ring seal, packing washer, deformable seal circle, elastic washer composition.Guide base
It is integral with valve body, valve seat is arranged on guide base.Guide base inner ring carries T-shaped structure, the T-shaped knot with valve seat outer ring
Structure is engaged.Valve seat back-moving spring both ends are separately fixed on valve seat and valve element, and keep certain pretightning force.In valve seat and lead
To double anti-gas-leak structure has been installed between pedestal additional, the first heavy anti-gas-leak structure is pacified above valve seat and guide base junction
Deformable seal circle is filled, outer top installs packing washer additional in deformable seal circle, is screwed on valve seat.It is deformable
The material of sealing ring uses deformable flexible plastic, ensures that it does not influence the motion of valve seat.Second resealing is in valve seat and led
Two layers of O-ring seal has been installed additional to the T-shaped junction of pedestal.
Claims (3)
1. fuel gas injection valve is oriented to outside a kind of piezoelectric type of bypass 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, fixed block is fixed with valve body, is provided with the middle part of fixed block
Straight trough, piezo-electric crystal are arranged in straight trough, and dividing plate is set in the middle part of valve body, fluid power amplifier is set above dividing plate, is set below dividing plate
Valve element assembly is put, the fluid power amplifier includes big piston, valve piston, sleeve, and sleeve is arranged on dividing plate, sleeve upper end
Center 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 thin outlet
In, big piston support spring is set between the flange and sleeve of big piston, valve piston is set between the flange and sleeve of valve piston
Support spring, it is bonded filled with hydraulic oil, big piston upper surface with piezo-electric crystal lower surface in the sleeve below big piston, valve piston
Together, big piston exterior sets circle ring disk, and valve piston upper surface is bonded with circle ring disk lower surface, in circle ring disk and fixed block
Groove is set, and the both ends of back-moving spring are 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 arrange while linked together by fastening bolt from top to bottom, bullet
Spring abutment is located at outside armature and annular groove is formed between armature, and dividing plate lower surface sets annular groove, the both ends point of back-moving spring
It is not arranged in the annular groove of dividing plate and the annular groove of spring base, pressure compensation opening is set at armature center, pressure is set on bottom plate
Dynamic balance groove, valve element are hollow structure, and pressure compensation opening, relief groove, the hollow space of valve element are communicated, set on valve element close
Seal ring band and fin, valve element upper surface open up axially main air drain, and seal band forms ring cavity, circumferential tonifying Qi hole is provided with fin,
Through hole and passage are set respectively on dividing plate, and the middle part of valve rod passes through through hole, and the top of valve rod is connected with circle ring disk, under valve rod
Side is fixed together by jump ring and armature；The floating valve seat includes guide base, valve seat, and guide base is fixed on valve body
In, 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 by setting the T-shaped knot coordinated with it
Structure is arranged in guide base, and the both ends of valve seat back-moving spring are separately fixed on valve seat and valve element, and compression ring is set out on valve seat
Band, outlet annulus are located at below ring cavity, and gas outlet is set below outlet annulus.
2. fuel gas injection valve is oriented to outside piezoelectric type of a kind of bypass 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
Installation deformable seal circle above junction, deformable seal circle interior edge top install packing washer, the second heavy anti-gas-leak structure additional
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 piezoelectric type of a kind of bypass type with floating valve seat according to claim 1 or 2, it is special
Sign is：Air inlet is set on valve body, and air inlet is located at the outwardly directed part of valve body, air inlet diversion cavity formed below, air inlet
Mouth, diversion cavity communicate；
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, piezoelectricity
By current excitation so as to extend, big piston moves downward crystal therewith, hydraulic fluid pressure rise, the small work on fluid power amplifier
Plug motion upwards, circle ring disk band ovable valve stem is also moved upwards, and under the fixation of jump ring, band movable valve plug assembly is transported upwards
Dynamic, gas circuit is opened, and gas valve is opened, and gas is flowed into by the axially mixed admission mode in main air drain and circumferential tonifying Qi hole, passes through ring
Chamber, vertically flowed out by gas outlet；After piezo-electric crystal power-off, piezo-electric crystal shortens, big living in the presence of big piston support spring
Initial position is got back into, hydraulic fluid pressure declines, and in the presence of master reset spring, circle ring disk, valve piston move downward, valve
Bar, valve element assembly move downward therewith, until pressure returns to original state in fluid power amplifier, big piston, valve piston return to
Initial position, valve element assembly return to initial position, and gas valve is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720760714.1U CN206816390U (en) | 2017-06-28 | 2017-06-28 | Fuel gas injection valve is oriented to outside a kind of piezoelectric type of bypass type with floating valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720760714.1U CN206816390U (en) | 2017-06-28 | 2017-06-28 | Fuel gas injection valve is oriented to outside a kind of piezoelectric type of bypass type with floating valve seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206816390U true CN206816390U (en) | 2017-12-29 |
Family
ID=60762431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720760714.1U Withdrawn - After Issue CN206816390U (en) | 2017-06-28 | 2017-06-28 | Fuel gas injection valve is oriented to outside a kind of piezoelectric type of bypass type with floating valve seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206816390U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131077A (en) * | 2017-06-28 | 2017-09-05 | 哈尔滨工程大学 | Fuel gas injection valve is oriented to outside a kind of piezoelectric type of the bypass type with floating valve seat |
-
2017
- 2017-06-28 CN CN201720760714.1U patent/CN206816390U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131077A (en) * | 2017-06-28 | 2017-09-05 | 哈尔滨工程大学 | Fuel gas injection valve is oriented to outside a kind of piezoelectric type of the bypass type with floating valve seat |
| CN107131077B (en) * | 2017-06-28 | 2023-06-09 | 哈尔滨工程大学 | Bypass piezoelectric type external guide gas injection valve with floating valve seat |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20171229 Effective date of abandoning: 20230609 |