CN107165747A - Fuel gas injection valve is oriented in a kind of piezoelectric type of bypass type axial admission - Google Patents
Fuel gas injection valve is oriented in a kind of piezoelectric type of bypass type axial admission Download PDFInfo
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- CN107165747A CN107165747A CN201710504624.0A CN201710504624A CN107165747A CN 107165747 A CN107165747 A CN 107165747A CN 201710504624 A CN201710504624 A CN 201710504624A CN 107165747 A CN107165747 A CN 107165747A
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- valve
- valve element
- piston
- sleeve
- guide finger
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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)
Abstract
It is an object of the invention to provide be oriented to fuel gas injection valve in a kind of piezoelectric type of bypass type axial admission, it is powered and is extended using piezo-electric crystal, moved via the guide finger of fluid power amplifier displacement enlargement pusher movable valve plug assembly, the overall motion of being lifted off a seat between guide finger and dividing plate under the interior guide effect of mating surface of valve element assembly, realizes the function of gas valve jet；Using the plenum system of bypass, flowing of the combustion gas in valve body is oriented to；Valve element bottom is using seal band and then forms air inlet ring cavity, and combustion gas is entered axially into, and on the one hand avoids combustion gas interference, it is ensured that gas circuit is balanced, and is on the other hand alleviated valve seat quality, is improved response speed；The present invention is using the valve seat construction with pressure stabilizing cavity, and it can effectively inhibit the fluctuation of gaseous-pressure inside fuel gas injection valve, it is ensured that the stability of fuel gas injection valve whiff pressure.
Description
Technical field
The present invention relates to a kind of fuel gas injection valve, the specifically gas injection on gas machine and bi-fuel internal combustion engine
Penetrate valve.
Background technology
With developing rapidly for society, the demand of the energy increasingly increases, and also increasingly sharpens the problem of environmental pollution, natural gas
Because of its own rich reserves, cheap and with good economy and emission performance, as the energy most with prospects,
Internal combustion engine industry, using natural gas as the main fuel of internal combustion engine operation, has significant effect for reduction emission problem, because
This, the study hotspot in internal combustion engine industry is already become using natural gas in recent years as the internal combustion engine of main fuel.Gas injection
Valve is penetrated as the important executive component in the air supply system of gas fuel engine, the quality of its performance directly affects internal combustion engine
Characteristic.At present, in the practical work process of fuel gas injection valve, according to the difference of internal-combustion engine rotational speed, fuel gas injection valve
Response time it is general at several milliseconds between a few tens of milliseconds, i.e., need to possess high response speed fast to meet its for fuel gas injection valve
The requirement of speed switch, at the same time, fuel gas injection valve also needs to possess as far as possible big outlet cross-section area, to ensure that internal combustion engine is obtained
Sufficient gas quantity, in addition, the flow regime of combustion gas itself, the stability for spraying gaseous-pressure and control during fuel gas injection valve work
The characteristics such as precision processed can be impacted to engine performance.
The content of the invention
It is an object of the invention to provide a kind of bypass type axial direction that lift is variable, response speed is high, whiff pressure is stable
Fuel gas injection valve is oriented in the piezoelectric type of air inlet.
The object of the present invention is achieved like this：
Fuel gas injection valve is oriented in a kind of piezoelectric type of bypass type axial admission of the present invention, it is characterized in that：Including valve body, valve
Seat, piezo-electric crystal, fluid power amplifier, dividing plate, valve element assembly, valve body are fixedly arranged above in the middle part of fixed block, fixed block and are provided with directly
Groove, piezo-electric crystal is arranged in straight trough, and valve body is fixed on valve seat, and dividing plate is set in valve body, and fluid power amplifier is set on dividing plate
Side, valve element assembly is arranged on below dividing plate, is set respectively on dividing plate and is formed valve between valve body and valve seat below through hole, dividing plate
Space, the fluid power amplifier includes big piston, valve piston, sleeve, and sleeve is arranged on dividing plate, and the end of sleeve upper end is set
Thick outlet, sleeve upper end tip inside sets thin outlet, and big piston is arranged in thick outlet, and valve piston is arranged in thin outlet,
Big piston support spring is set between the flange and sleeve of big piston, sets valve piston to support between the flange and sleeve of valve piston
Filled with hydraulic oil in sleeve below spring, big piston, valve piston, guide finger is passed through to be set above the through hole of dividing plate, guide finger
Control valve rod is put, guide finger back-moving spring is set between guide finger and control valve rod, upper surface and the piezo-electric crystal of valve rod is controlled
Fit together, the lower surface of control valve rod is fit together with big piston upper surface, and valve piston upper surface is fitted with guide finger
Together, described valve element assembly includes armature, spring base, bottom plate, valve element, and armature, bottom plate, valve element are arranged together from top to bottom
When linked together by fastening bolt, spring base is located at outside armature and forms annular groove, dividing plate lower surface between armature
Annular groove is set, and the two ends of armature back-moving spring are arranged in the annular groove of the annular groove of dividing plate and spring base, guide finger
Mutually fixed with armature, set in guide finger and relief groove is set on pressure compensation opening, 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, seal band formation air inlet ring cavity, valve seat
Band, outlet annulus is located at below air inlet ring cavity, and gas outlet is set below outlet annulus.
The present invention can also include：
1st, the outer end of valve seat sets end pressure stabilizing cavity.
The 2nd, extension is set on valve body, and extension sets and sets diversion cavity in the valve body below air inlet, air inlet,
Air inlet, diversion cavity are communicated and constitute exterior space, and exterior space is communicated with inner space, and axial admission hole is set on valve element；
Combustion gas vertically flows into diversion cavity through air inlet, and a part of combustion gas is flowed into the center voltage stabilizing of inner space and valve seat
Chamber, remaining combustion gas is flowed into above valve element, and a part of combustion gas stream is through axial air admission hole, full of the air inlet ring cavity on valve element, another portion
Combustion gas is divided to flow into the end pressure stabilizing cavity of valve seat outer end；
When piezo-electric crystal is not powered on, the upper surface of seal band and valve seat on valve element is fitted close, and combustion gas is full of combustion gas
The exterior space of the valve inner of injection valve and inner space；Piezo-electric crystal be powered after, piezo-electric crystal by current excitation so as to
Elongation, promotes big piston to move downward, the hydraulic oil in sleeve is compressed, in the presence of hydraulic fluid pressure, valve piston to
Upper motion, guide finger is also moved upwards, and band movable valve plug assembly is moved upwards, and fuel gas injection valve is opened, and gas circuit is opened, Zhi Daotao
Cylinder in hydraulic fluid pressure return to original state, big piston and valve piston are no longer moved, and valve element assembly stops therewith, combustion gas by
Axial admission hole on valve element is flowed into, and by air inlet ring cavity, the space between valve element and valve seat is finally led via gas outlet
Vertical outflow backward；After piezo-electric crystal power-off, piezo-electric crystal shortens, and in the presence of big piston support spring, big piston is returned to
Hydraulic fluid pressure declines in initial position, sleeve, and in the presence of guide finger back-moving spring, guide finger is moved downward, valve piston,
Valve element assembly is moved downward therewith, until hydraulic fluid pressure returns to original state in sleeve, big piston, valve piston are returned to initially
Position, valve element assembly returns to initial position, and spool face is fitted with valve base surface, and fuel gas injection valve is closed, and gas circuit is closed.
Advantage of the invention is that：The present invention is powered using piezo-electric crystal to be extended, after fluid power amplifier displacement enlargement
Promote the guide finger motion of valve element assembly, the interior guide effect of the overall mating surface between guide finger and dividing plate of valve element assembly
Under lift off a seat motion, realize the function of gas valve jet；The present invention effectively increases combustion by the way of piezo-electric crystal driving
The response speed of gas jet valve, by the different current driver mode of piezo-electric crystal, the lift for realizing fuel gas injection valve is variable；
The present invention is oriented to using the plenum system of bypass to flowing of the combustion gas in valve body；Apply seal band in valve element bottom
And then air inlet ring cavity is formed, combustion gas is entered axially into, and on the one hand avoids combustion gas interference, it is ensured that gas circuit is balanced, on the other hand
Valve seat quality is alleviated, response speed is improved；The present invention is using the valve seat construction with pressure stabilizing cavity, and it can effectively be inhibited
The fluctuation of gaseous-pressure inside fuel gas injection valve, it is ensured that the stability of fuel gas injection valve whiff pressure；The present invention is in guide finger
Place is provided with pressure compensation opening, and relief groove is provided with bottom plate, promotes gas circuit inside and outside valve element assembly to reach balance, protects
Demonstrate,prove poor without gaseous-pressure above and below valve element assembly, it is to avoid valve element assembly is further improved by extra axial force
The response speed of fuel gas injection valve, reduces the control difficulty of fuel gas injection valve work.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is valve element composite unit structure enlarged drawing of the invention；
Fig. 3 moves towards figure for the gas circuit of the present invention；
Fig. 4 is valve element three-dimensional structure enlarged drawing；
Fig. 5 is valve seat three-dimensional structure enlarged drawing.
Embodiment
Illustrate below in conjunction with the accompanying drawings and the present invention is described in more detail：
It is the entirety that fuel gas injection valve is oriented in a kind of piezoelectric type of bypass type axial admission of the invention with reference to Fig. 1-5, Fig. 1
Structural representation, including 1 fixed block, 2 piezo-electric crystals, 3 valve bodies, 4 control valve rods, 5 big pistons, 6 big piston support springs, 7 is close
Seal ring, 8 sleeves, 9 O-ring seals, 10 O-ring seals, 12 bolts, 13 O-ring seals, 14 guide finger back-moving springs, 15 small work
Plug, 16 valve piston support springs, 19 valve element assemblys and 21 valve seats.Valve body 3 is a cuboid, is provided with close to its center one end
The air inlet 33 and diversion cavity 34 of combustion gas, the hole of certain depth is provided with the other end close to the center of valve body 3 under vertically,
The dividing plate 18 of certain depth is separated with the middle of holes, the through hole of the lower section of dividing plate 18 is connected with diversion cavity 34, and fixed block 1 utilizes positioning
Bolt 12 links together it with valve body 3, the center for making its own be fixed on the top through hole top of dividing plate 18, in fixation
Sealing is kept in mating surface between block 1 and valve body 3 by O-ring seal 13, fixed block 1 is provided with a depthkeeping in center
The straight trough of degree, piezo-electric crystal 2 is arranged therein, and the less through hole of a diameter is provided with above straight trough, for arranging piezo-electric crystal 2
With connecting wires for the outer control unit of valve body 3, the lower section close arrangement of piezo-electric crystal 2 has control valve rod 4, controls the lower surface of valve rod 4
It is in contact with the big upper surface of piston 5, under the pretightning force effect of guide finger back-moving spring 14, big piston support spring 6, piezo crystals
Together with the lower surface of body 2 is brought into close contact with control valve rod 4 upper surface, the control lower surface of valve rod 4 with the big upper surface of piston 5, set
8 upper ends of cylinder are two outlets, are a thick outlet and a thin outlet respectively, and lower end is the closing chamber of a connection, the lower end cloth of big piston 5
Put in the thick outlet of sleeve 8, big piston support spring 6 is located between the big flange of piston 5 and sleeve 8, it is ensured that big piston 5 will not
It is overall to enter in sleeve 8, be filled with sleeve 8 above the hydraulic oil 17 with certain pressure, the thin outlet of sleeve 8 be disposed with it is small
Piston 15, the lower end of valve piston 15 is arranged therein, and valve piston support spring is disposed between the flange of valve piston 15 and sleeve 8
16, to ensure that valve piston 15 integrally will not enter in sleeve, arranged between big piston 5, the side surface of valve piston 15 and the inwall of sleeve 8
There is sealing ring 7, to prevent the leakage of hydraulic oil 17 in sleeve 8, big piston 5, valve piston 15, big piston support spring 6, valve piston
Support spring 16 has together constituted with the fluid power amplifier of piezo-electric crystal 2 with sleeve 8, and fluid power amplifier exists as an integral arrangement
The top of the median septum 18 of valve body 3, control valve rod 4 has been sequentially arranged valve element assembly 19, valve seat from top to bottom below center
21, under the pretightning force effect of valve piston support spring 16, the upper surface of valve piston 15 and the upper end of valve element assembly 19 are closely pasted
Close, be provided with bolt hole 38 on valve seat 21, be bolted to connection between valve seat 21 and valve body 3 together with, matching somebody with somebody therebetween
Sealing is realized in conjunction face by O-ring seal 10, and valve seat 21 is provided with surely in center and close to two ends at seal band 27
Chamber 11 is pressed, the pressure stabilizing cavity 11 of the center of valve seat 21 is connected with the combustion gas space inside valve element assembly 19, and 21 liang of valve seat
The pressure stabilizing cavity 11 at end is connected with the diversion cavity 33 in valve body 3；
As shown in Fig. 2 a kind of piezoelectric type of bypass type axial admission in be oriented to fuel gas injection valve valve element assembly 19 by
Guide finger 22, armature 23, spring base 24, bottom plate 25, valve element 26, armature back-moving spring 29, pad 30 and fastening bolt 32 are constituted,
To ensure that guide finger 22 is smoothly moved, multiple sleeves 8 are disposed with thereunder, corresponding multiple valve pistons 15 are arranged symmetrically in
The lower section of guide finger 22, number is even number, in the presence of valve piston support spring 16, the upper surface of valve piston 15 and valve element group
The lower surface of guide finger 22 in zoarium 19 is brought into close contact, and the center of guide finger 22 is provided with pressure compensation opening 28, is arranged in dividing plate 18
In the through hole of the heart, the lower end of guide finger 22 is connected through a screw thread to be fixed together with armature 23, armature 23 by fastening bolt 32 with
Bottom plate 25, valve element 26 are linked together, and one layer of pad 30 is disposed between armature 23 and bottom plate 25, and the top of bottom plate 25 is provided with four
Relief groove 31, spring base 24 is arranged on the top of bottom plate 25, and its internal side surface is in contact with the side surface of armature 23,
The two ends of armature back-moving spring 29 are located at dividing plate 18 respectively and in the annular groove of spring base 24, the valve element 26 of the lower section of bottom plate 25 is by valve
Core main body, seal band 27 are constituted, and the integral arrangement of valve element assembly 19 is below control valve rod 4.
As shown in figure 3, combustion gas is oriented in fuel gas injection valve in a kind of piezoelectric type of bypass type axial admission, and first, combustion
Gas is by the enterprising gas port 33 of valve body 3 vertically into after being oriented to through diversion cavity 34, fuel gas flow direction is changed to level side by vertical direction
To the surrounding space of valve element assembly 19 being flowed into, due to the presence of the relief groove 31 on bottom plate 25, inside valve element assembly 19
Space is connected with space in valve body 3, and a part of combustion gas can be flowed into the inner space of valve element assembly 19, and valve element group is filled with immediately
The pressure stabilizing cavity 11 of fit 19 inner spaces and the center of valve seat 21, due to the presence in the upper pressure balance hole 28 of guide finger 22, combustion
Gas can flow into the superjacent air space of valve element assembly 19, equally be full of the superjacent air space of valve element assembly 19；Remaining combustion gas flows into valve element 26
Top, axial admission hole 35 of a part of combustion gas on valve element 26 flow into, full of having one around multiple-sealed annulus 27
The air inlet ring cavity 36 of depthkeeping degree, another part combustion gas is filled with around the pressure stabilizing cavity 11 at the two ends of valve seat 21 and valve element 26 empty
Between.When piezo-electric crystal 2 is not powered on, the surface of valve element 26 fits with the surface of valve seat 21, air inlet ring cavity 36 and valve seat on valve element 26
Ring cavity on 21 near outlet annulus 20 is not connected；After piezo-electric crystal 2 is powered, piezo-electric crystal 2 extends, and amplifies through fluid power amplifier
The motion upwards of band movable valve plug assembly 19 afterwards, the surface of valve element 26 departs from the surface of valve seat 21, now air inlet ring cavity 36 and outlet annulus
Ring cavity near 20 is connected, the lifting and take a seat of valve element 26 control air inlet ring cavity 36 and the ring cavity near outlet annulus 20 it
Between break-make.
In the fuel gas injection valve course of work, when piezo-electric crystal 2 is not powered on, bullet is resetted in guide finger back-moving spring 14, armature
Under the pretightning force effect of spring 29, valve element assembly 19 remains motionless in initial position, on the valve element 26 in valve element assembly 19
The upper surface of seal band 27 and valve seat 21 is fitted close, and the air inlet ring cavity 36 on valve element 26 and outlet annulus 20 on valve seat 21 are attached
Near ring cavity is not connected, the whole space inside valve body 3 of the combustion gas full of fuel gas injection valve.After piezo-electric crystal 2 is powered, piezo crystals
Body 2 is by current excitation so as to extend so that control valve rod 4 is moved downward, and big piston 5 is moved downward therewith, the liquid in sleeve 8
17 pressure rises are pressed oil, in the presence of the pressure of hydraulic oil 17, valve piston 15 is moved upwards, and guide finger 22 is by multiple valve pistons
After 15 upward active forces, smoothly motion upwards, guide finger 22 is used as a part for valve element assembly 19, valve element assembly 19
Overall motion upwards therewith, now, fuel gas injection valve is opened, and gas circuit is opened, until the pressure of hydraulic oil 17 in sleeve 8 is returned to just
Beginning state, big piston 5, the stop motion of valve piston 15, the stop motion therewith of valve element assembly 19, valve element assembly 19 is in the position
A period of time is maintained, during this, axial admission hole 35 of the combustion gas on valve element 26 is flowed into, around multiple-sealed annulus 27
Air inlet ring cavity 36 with certain depth, via the space between valve element 26 and valve seat 21, after being finally oriented to via gas outlet 37
Vertical outflow, uses multiple tracks annulus, face sealing, voltage stabilizing balance, and wider annulus area to subtract between valve element 26 and valve seat 21
Shaochong is hit, and improves reliability, valve seat 21 is in the pressure stabilizing cavity 11 set at the two ends of air inlet ring cavity 36 and its center position
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 to break
Electricity, piezo-electric crystal 2 shortens, in the presence of big piston support spring 6, and big piston 5 starts hydraulic oil in upward motion, sleeve 8
17 pressure decline, and in the presence of guide finger back-moving spring 14, guide finger 22 starts to move downward, valve piston 15, valve element combination
Body 19 is overall together to be moved downward therewith, until the pressure of hydraulic oil 17 returns to original state, big piston 5, valve piston 15 in sleeve 8
Initial position is returned to, now valve element assembly 19 is also corresponding returns to initial position, and the surface of valve element 26 is fitted with the surface of valve seat 21,
Initial position is come back to, fuel gas injection valve is closed, and gas circuit is closed.
From the above-mentioned course of work：Fuel gas injection is oriented in a kind of piezoelectric type of bypass type axial admission of the present invention
Valve, in the course of the work, is powered using piezo-electric crystal 2 and extended, via fluid power amplifier displacement enlargement pusher movable valve plug assembly
19 guide finger 22 is moved, valve element assembly 19 it is overall between guide finger 22 and dividing plate 18 under the interior guide effect of mating surface from
Valve opening seat 21 is moved, and realizes the function of gas valve jet；The present invention effectively increases combustion by the way of the driving of piezo-electric crystal 2
The response speed of gas jet valve, by the different current driver mode of piezo-electric crystal 2, the lift for realizing fuel gas injection valve can
Become；The present invention is oriented to using the plenum system of bypass to flowing of the combustion gas in valve body 3；The bottom of valve element 26 is using close
Seal ring band 27 and then formation air inlet ring cavity 36, combustion gas is entered axially into, and on the one hand avoids combustion gas interference, it is ensured that gas circuit is put down
Weighing apparatus, on the other hand alleviates the mass of valve seat 21, improves response speed；The present invention is using the knot of valve seat 21 with pressure stabilizing cavity 11
Structure, it can effectively inhibit the fluctuation of gaseous-pressure inside fuel gas injection valve, it is ensured that fuel gas injection valve whiff pressure it is steady
It is qualitative；The present invention is provided with pressure compensation opening 28 at guide finger 22, and relief groove 31 is provided with bottom plate 25, promotes valve
Gas circuit reaches balance inside and outside core assembly 19, it is ensured that valve element assembly is poor without gaseous-pressure about 19, it is to avoid valve element combination
Body 19 further increasing the response speed of fuel gas injection valve by extra axial force, reduce fuel gas injection valve work
Control difficulty.
Be oriented to fuel gas injection valve in a kind of piezoelectric type of bypass type axial admission of the present invention, including fixed block, piezo-electric crystal,
Valve body, control valve rod, big piston, big piston support spring, sealing ring, sleeve, O-ring seal, bolt, guide finger reset
Spring, valve piston, valve piston support spring, valve element assembly and valve seat, valve body are a cuboid, are opened close to its center one end
There are the air inlet and diversion cavity of combustion gas, the hole of certain depth, two are provided with vertically in the other end close to valve body center
It is separated with the hole space below the dividing plate of certain depth, dividing plate in the middle of hole with diversion cavity to be connected, fixed block will using bolt
It links together with valve body, the center for making its own be fixed on dividing plate upper aperture top, between fixed block and valve body
Mating surface on sealing is kept by O-ring seal, fixed block is provided with the straight trough of certain depth, piezo-electric crystal in center
It is arranged therein, the less through hole of a diameter is provided with above straight trough, for arranges piezo-electric crystal and valve body outer control unit
Connect wires, close arrangement has control valve rod below piezo-electric crystal, the lower surface of control valve rod is in contact with big piston upper surface,
Under guide finger back-moving spring, the pretightning force effect of big piston support spring, piezo-electric crystal lower surface and control valve rod upper surface, control
Together with valve rod lower surface processed is brought into close contact with big piston upper surface, sleeve upper end is two outlets, be respectively a thick outlet and
One thin outlet, lower end is the closing chamber of a connection, and the lower end of big piston is arranged in the thick outlet of sleeve, big piston support spring
Between big plunger flange and sleeve, it is ensured that big piston integrally will not enter in sleeve, be filled with sleeve with a level pressure
Valve piston is disposed with above the hydraulic oil of power, the thin outlet of sleeve, valve piston lower end is arranged therein, in valve piston flange and set
Valve piston support spring is disposed between cylinder, to ensure that valve piston integrally will not enter in sleeve, big piston, valve piston side surface
Sealing ring is disposed between sleeve lining, to prevent the leakage of hydraulic oil in sleeve, big piston, valve piston, the support of big piston
Spring, valve piston support spring and sleeve have together constituted with the fluid power amplifier of piezo-electric crystal, and fluid power amplifier is whole as one
Body is arranged in the top of valve body median septum, and control valve rod has been sequentially arranged valve element assembly, valve from top to bottom below center
Seat, under the pretightning force effect of valve piston support spring, valve piston upper surface and the upper end of valve element assembly are brought into close contact, valve seat
On be provided with bolt hole, be bolted to connection between valve seat and valve body together with, mating surface therebetween passes through fluid sealant
Enclose to realize sealing, valve seat is provided with pressure stabilizing cavity in center and close to two ends at seal band, valve seat center
Pressure stabilizing cavity is connected with the combustion gas space inside valve element assembly, and the pressure stabilizing cavity at valve seat two ends is connected with the diversion cavity in valve body
It is logical；Foregoing valve element assembly is by guide finger, armature, armature back-moving spring, spring base, bottom plate, valve element, pad and fastening bolt
Composition, to ensure that guide finger is smoothly moved, is disposed with multiple sleeves, corresponding multiple valve pistons are arranged symmetrically in thereunder
Below guide finger, number is even number, in the presence of valve piston support spring, in valve piston upper surface and valve element assembly
Guide finger lower surface be brought into close contact, guide pin centre is provided with pressure compensation opening, in the through hole for being arranged in dividing plate center, guide finger
Lower end is fixed together by screw thread with armature, and armature is linked together by fastening bolt with bottom plate, valve element, armature with
It is disposed with one layer of pad between bottom plate, four relief grooves is provided with above bottom plate, spring base is arranged on the top of bottom plate, in it
The side surface in portion is in contact with the side surface of armature, and the two ends of armature back-moving spring are located at the annular groove of dividing plate and spring base respectively
Interior, the valve element below bottom plate is made up of valve element main body, seal band, and valve element assembly integral arrangement is below control valve rod；Combustion
Gas is by the enterprising gas port of valve body vertically into after being oriented to through diversion cavity, fuel gas flow direction is changed to horizontal direction by vertical direction, stream
Enter valve element assembly surrounding space, due to the presence of the relief groove on bottom plate, in valve element assembly inner space and valve body
Space is connected, and a part of combustion gas can be flowed into valve element assembly inner space, be filled with immediately valve element assembly inner space with
And the pressure stabilizing cavity of valve seat center, due to the presence in guide finger upper pressure balance hole, combustion gas can flow into empty above valve element assembly
Between, equally it is full of valve element assembly superjacent air space；Remaining combustion gas flows into the top of valve element, air inlet of a part of combustion gas on valve element
Hole is flowed into, and full of the air inlet ring cavity with certain depth around multiple-sealed annulus, another part combustion gas is filled with valve seat two
The surrounding space of pressure stabilizing cavity and valve element at end.When piezo-electric crystal is not powered on, spool face fits with valve base surface, valve element
On air inlet ring cavity do not connected with the ring cavity of outlet adjacent annular bands on valve seat；After piezo-electric crystal is powered, piezo-electric crystal elongation, through liquid
Band movable valve plug assembly is moved upwards after the amplification of power amplifier, and spool face departs from valve base surface, now air inlet ring cavity and outlet
The ring cavity of adjacent annular bands is connected, between the ring cavity for controlling air inlet ring cavity and outlet adjacent annular bands that lifts and take a seat of valve element
Break-make.
Claims (3)
1. fuel gas injection valve is oriented in a kind of piezoelectric type of bypass type axial admission, it is characterized in that：Including valve body, valve seat, piezoelectricity
Crystal, fluid power amplifier, dividing plate, valve element assembly, valve body are fixedly arranged above in the middle part of fixed block, fixed block and are provided with straight trough, piezoelectricity
Crystal is arranged in straight trough, and valve body is fixed on valve seat, and dividing plate is set in valve body, and fluid power amplifier is set above dividing plate, valve element
Assembly is arranged on below dividing plate, sets formation valve space, institute between the valve body and valve seat below through hole, dividing plate on dividing plate respectively
Stating fluid power amplifier includes big piston, valve piston, sleeve, and sleeve is arranged on dividing plate, and the end of sleeve upper end sets thick outlet,
Sleeve upper end tip inside sets thin outlet, and big piston is arranged in thick outlet, and valve piston is arranged in thin outlet, big piston
Big piston support spring is set between flange and sleeve, valve piston support spring is set between the flange and sleeve of valve piston, greatly
Filled with hydraulic oil in sleeve below piston, valve piston, guide finger passes through the through hole of dividing plate, and the top of guide finger sets control valve
Bar, guide finger back-moving spring is set between guide finger and control valve rod, and the upper surface and piezo-electric crystal for controlling valve rod are fitted in one
Rise, the lower surface of control valve rod fits together with big piston upper surface, and valve piston upper surface fits together with guide finger, institute
The valve element assembly stated includes armature, spring base, bottom plate, valve element, and armature, bottom plate, valve element are arranged simultaneously by tight from top to bottom
Fixing bolt links together, and spring base is located at outside armature and annular groove is formed between armature, and dividing plate lower surface sets annular
Groove, the two ends of armature back-moving spring are arranged in the annular groove of the annular groove of dividing plate and spring base, guide finger and armature phase
It is fixed, set in guide finger and relief groove is set on pressure compensation opening, bottom plate, 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 is set on seal band, seal band formation air inlet ring cavity, valve seat, go out compression ring
Band is located at below air inlet ring cavity, and gas outlet is set below outlet annulus.
2. fuel gas injection valve is oriented in a kind of piezoelectric type of bypass type axial admission according to claim 1, it is characterized in that：
The outer end of valve seat sets end pressure stabilizing cavity.
3. fuel gas injection valve, its feature are oriented in a kind of piezoelectric type of bypass type axial admission according to claim 1 or 2
It is：Extension is set on valve body, and extension sets and diversion cavity is set in the valve body below air inlet, air inlet, air inlet,
Diversion cavity is communicated and constitutes exterior space, and exterior space is communicated with inner space, and axial admission hole is set on valve element；
Combustion gas vertically flows into diversion cavity through air inlet, and a part of combustion gas is flowed into the center pressure stabilizing cavity of inner space and valve seat,
Remaining combustion gas is flowed into above valve element, and a part of combustion gas stream is through axial air admission hole, full of the air inlet ring cavity on valve element, another part combustion
Gas is flowed into the end pressure stabilizing cavity of valve seat outer end；
When piezo-electric crystal is not powered on, the upper surface of seal band and valve seat on valve element is fitted close, and combustion gas is full of fuel gas injection
The exterior space of the valve inner of valve and inner space；After piezo-electric crystal is powered, piezo-electric crystal by current excitation so as to extending,
Big piston is promoted to move downward, the hydraulic oil in sleeve is compressed, in the presence of hydraulic fluid pressure, and valve piston is transported upwards
Dynamic, guide finger is also moved upwards, and band movable valve plug assembly is moved upwards, and fuel gas injection valve is opened, and gas circuit is opened, until in sleeve
Hydraulic fluid pressure return to original state, big piston and valve piston are no longer moved, and valve element assembly stops therewith, and combustion gas is by valve element
On axial admission hole flow into, pass through air inlet ring cavity, the space between valve element and valve seat, after being finally oriented to via gas outlet
Vertical outflow；After piezo-electric crystal power-off, piezo-electric crystal shortens, and in the presence of big piston support spring, big piston is returned to initially
Hydraulic fluid pressure declines in position, sleeve, and in the presence of guide finger back-moving spring, guide finger is moved downward, valve piston, valve element
Assembly is moved downward therewith, until hydraulic fluid pressure returns to original state in sleeve, big piston, valve piston return to initial bit
Put, valve element assembly returns to initial position, spool face is 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 |
|---|---|---|---|
| CN201710504624.0A CN107165747B (en) | 2017-06-28 | 2017-06-28 | Piezoelectric type internal guide gas injection valve with bypass type axial air inlet |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710504624.0A CN107165747B (en) | 2017-06-28 | 2017-06-28 | Piezoelectric type internal guide gas injection valve with bypass type axial air inlet |
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| CN107165747B CN107165747B (en) | 2023-06-09 |
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| US20030052198A1 (en) * | 2001-07-03 | 2003-03-20 | Common Rail Technologies Ag | Fuel-injection valve for internal combustion engine |
| JP2003239809A (en) * | 2002-02-13 | 2003-08-27 | Fuji Seratekku Kk | Gas engine provided with fuel reforming device |
| DE102009053216A1 (en) * | 2009-11-06 | 2011-05-12 | Ipgate Ag | Electrically operated, hydraulic pressure-balanced two by two-path-fast-acting on-off valve has electromagnet, anchor, and valve seat, where piston slide is pivoted in housing part in axial direction |
| CN105508082A (en) * | 2015-11-27 | 2016-04-20 | 哈尔滨工程大学 | Pressurized leakage-free electromagnetically-controlled gas injection device |
| CN105781797A (en) * | 2016-02-29 | 2016-07-20 | 哈尔滨工程大学 | Electromagnetic and piezoelectric combined fuel gas injection device |
| CN205977465U (en) * | 2016-08-31 | 2017-02-22 | 重庆红江机械有限责任公司 | Gaseous fuel is gas electricity injection valve for engine |
| CN107091354A (en) * | 2017-06-28 | 2017-08-25 | 哈尔滨工程大学 | Fuel gas injection valve is oriented in a kind of piezoelectric type of through type axial admission |
| CN206816407U (en) * | 2017-06-28 | 2017-12-29 | 哈尔滨工程大学 | Fuel gas injection valve is oriented in a kind of piezoelectric type of bypass type axial admission |
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2017
- 2017-06-28 CN CN201710504624.0A patent/CN107165747B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030052198A1 (en) * | 2001-07-03 | 2003-03-20 | Common Rail Technologies Ag | Fuel-injection valve for internal combustion engine |
| JP2003239809A (en) * | 2002-02-13 | 2003-08-27 | Fuji Seratekku Kk | Gas engine provided with fuel reforming device |
| DE102009053216A1 (en) * | 2009-11-06 | 2011-05-12 | Ipgate Ag | Electrically operated, hydraulic pressure-balanced two by two-path-fast-acting on-off valve has electromagnet, anchor, and valve seat, where piston slide is pivoted in housing part in axial direction |
| CN105508082A (en) * | 2015-11-27 | 2016-04-20 | 哈尔滨工程大学 | Pressurized leakage-free electromagnetically-controlled gas injection device |
| CN105781797A (en) * | 2016-02-29 | 2016-07-20 | 哈尔滨工程大学 | Electromagnetic and piezoelectric combined fuel gas injection device |
| CN205977465U (en) * | 2016-08-31 | 2017-02-22 | 重庆红江机械有限责任公司 | Gaseous fuel is gas electricity injection valve for engine |
| CN107091354A (en) * | 2017-06-28 | 2017-08-25 | 哈尔滨工程大学 | Fuel gas injection valve is oriented in a kind of piezoelectric type of through type axial admission |
| CN206816407U (en) * | 2017-06-28 | 2017-12-29 | 哈尔滨工程大学 | Fuel gas injection valve is oriented in a kind of piezoelectric type of bypass type axial admission |
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| CN107165747B (en) | 2023-06-09 |
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