CN106949246B - A kind of pneumatic pilot-operated type variable gas distribution structure of high-speed large-flow - Google Patents
A kind of pneumatic pilot-operated type variable gas distribution structure of high-speed large-flow Download PDFInfo
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- CN106949246B CN106949246B CN201710116881.7A CN201710116881A CN106949246B CN 106949246 B CN106949246 B CN 106949246B CN 201710116881 A CN201710116881 A CN 201710116881A CN 106949246 B CN106949246 B CN 106949246B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
- F01L9/16—Pneumatic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/363—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a piston
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention discloses a kind of pneumatic pilot-operated type variable gas distribution structures of high-speed large-flow.Including valve body, spool, spacing collar, spring and valve deck, valve body structure on two sides is symmetrical, and identical two inner cavities of structure are provided with inside two sides, and two inner cavities are respectively used to import/exhaust, spool, spacing collar and spring are respectively arranged in two inner cavities, top end of the valve body installs valve deck；Top, bottom end and the side wall of one side structure of valve body are provided with blind hole, and top is coaxially arranged with the blind hole of bottom end and is connected, and are connected between bottom end and sidewall end blind hole, and spool includes the power piston, dummy piston and valve being sequentially coaxially fixedly connected from top to bottom.The present invention can overcome traditional valve actuating mechanism that can not maintain the defect of work under high pressure gas environment, it is ensured that the reliability of air distribution system work；The line style constraint for eliminating actuated by cams, realizes the flexible continuous variable of port timing, so that air motor is reduced high pressure gas loss, improves energy conversion efficiency, and structure is simple, easily controllable.
Description
Technical field
The present invention relates to variable gas distribution structures, more particularly, to a kind of pneumatic pilot-operated type variable gas distribution of high-speed large-flow
Structure can be used as the valve actuating mechanism of air motor, or suitable for other pairs of intake process there is high-pressure high-flow accurately to control
It is required that working environment.
Background technique
Automobile work with China's expanding economy and the raising of living standards of the people, as one of China's pillar industry
Industry is just rapidly developed at an unprecedented rate.China's car ownership rapid development, the Pressure on Energy of automobile industry
Also increasingly increase with environmental protection pressure.Vehicle fuel is the blood of auto industry.Currently, motor vehicle fuel is still mainly with oil product
In gasoline, based on diesel oil.Internal-combustion engines vehicle consumes the valuable non-renewable fossil resource such as bulk petroleum, natural gas, is big
The generally acknowledged big power consumer of family.Especially with sharply increasing for car ownership, fossil fuel is largely consumed, this results in stone
Oil product imbalance between supply and demand is increasingly serious.Automobile production manufacturer of various countries and relevant scientific research institution are being dedicated to improving internal combustion engine
While can be to meet increasingly strict environmental protection standard requirement, more energy be also put into a new generation and does not use or less makes
With the minerals such as petroleum fuel, minimum discharge, clean energy-saving new automobile research and development in, automobile engine is to energy conservation and environmental protection
Alternative energy source demand it is increasingly urgent.Wherein valve actuating mechanism is the core component of air motor, is directly affected pneumatic
Output torque revolving speed, energy conversion efficiency and the air consumption of engine.Different from traditional combustion engine, air motor is in practical work
In-cylinder pressure is lower than inlet pressure when making, and under the action of cylinder inside and outside differential pressure, valve surfaces bear very big back pressure always, when
When pressure is more than the pretightning force of valve spring, valve will be opened under the action of inlet pressure, cause seal failure, air inlet
Leakage, to influence the working efficiency of complete machine.Another aspect port timing is the key parameter for influencing air motor performance, and
In conventional cam formula valve actuating mechanism, the adjusting of port timing is limited by cam line style, many times has no idea to adjust and arrive
Optimum value, so being badly in need of this variable phase valve actuating mechanism of the present invention.
Summary of the invention
Distribution work is normally completed under hyperbaric environment in order to overcome existing traditional valve actuating mechanism to be unable to satisfy, and can not
Optimal port timing is provided for air motor, the present invention provides a kind of pneumatic pilot-operated type variable gas distribution knots of high-speed large-flow
Structure can be used as the valve actuating mechanism of air motor, or applied to other pairs of intake process there is high-pressure high-flow accurately to control
Desired working environment is made, to solve many deficiencies of traditional valve actuating mechanism.
The technical solution adopted by the present invention is that:
The present invention includes valve body, spool, spacing collar, spring and valve deck, and valve body structure on two sides is symmetrical, and opens inside two sides
There are identical two inner cavities of structure, two inner cavities are respectively used to air inlet and outlet, are respectively arranged with spool, spacing collar in two inner cavities
And spring, top end of the valve body install valve deck, valve deck top is connect with high-speed switch valve, and valve body bottom end connects cylinder.
Top, bottom end and the side wall of one side structure of valve body are provided with blind hole, and the blind hole of top and bottom end is coaxially arranged
And be connected by first step through-hole, it is connected between bottom end and the blind hole of sidewall end by second step through-hole, bottom end is blind
The hole end surface edge in hole is provided with import/exhaust doormat ring recess, and import/exhaust doormat ring recess is equipped with washer；Top blind hole top side
Body wall be provided with location hole；
The spool includes the power piston, dummy piston and valve being sequentially coaxially fixedly connected from top to bottom；Power
It is fixedly connected respectively by upper axis with lower axle between piston and dummy piston, between power piston and valve, power piston passes through
Gasket and clamp nut are connected to axis top, and the lateral circle surface of power piston and dummy piston has power piston sealing
Ring recess, equalizing piston packing ring slot；Power piston and dummy piston are respectively placed in top end of the valve body and the blind hole of bottom end, valve position
Near at the hole end surface of bottom end blind hole；
Upper axis wears first step through-hole and is tightly connected by piston rod seals, installation in power piston seal groove
Dynamic piston seal, power piston between power piston sealing ring and the side wall of top blind hole by being tightly connected；Balance
Equalizing piston packing ring is installed, dummy piston passes through the side wall of equalizing piston packing ring and bottom end blind hole in piston seal ring recess
Between be tightly connected；Top blind hole below power piston is provided with spacing collar, upper between spacing collar and power piston
Axle sleeve has spring, and both ends of the spring is connected respectively to power piston bottom surface and spacing collar inner bottom surface.
The inner cavity of the valve body includes superposed control chamber and the main chamber positioned at lower part, and top blind hole is as control
Chamber, bottom end blind hole connect gas source as main import/exhaust mouth, main import/exhaust mouth as main chamber, sidewall end blind hole；Dummy piston will
Control chamber is divided into the first guide cavity above dummy piston and the spring cavity below dummy piston, and power piston divides main chamber
For the connection air cavity above power piston and the main entry/exit air cavity below power piston, so that dummy piston
Lower surface and valve upper surface are equal by high-pressure gas pressure.
First guide cavity is located at power piston top, between power piston and high-speed switch valve outlet side.Spring cavity is located at
Power piston lower part between power piston and main chamber, and is equipped with spring and spacing collar.Main chamber be located at spring cavity be connected to
Below air flue, main porting and cylinder are connected.
Valve body two sides are divided into air inlet side and exhaust side, fill high pressure gas to the first guide cavity of import/exhaust side by high-speed switch valve
Body, high pressure gas pushes the spool of import/exhaust side to move down, between the valve of import/exhaust side and the port of main import/exhaust chamber
Separation makes winner's import/exhaust mouth and gas connection in cylinder and realizes import/exhaust.
The side on the valve body bottom end blind hole top is equipped with connection air flue, and main chamber top is communicated to valve body bottom through being connected to air flue
End face center is held, keeps high-pressure gas pressure suffered by dummy piston upper surface and valve lower surface equal by being connected to air flue.
The spacing collar is located in spring cavity, covers outside spring, spacing collar diameter and power piston diameter phase
Together, so that limit power piston and valve moves down stroke.
The through-hole for top blind hole to be connected with high-speed switch valve is provided on the valve deck, through-hole diameter is less than valve
The top diameter of blind hole of body, so that limiting power piston moves up stroke.
The valve deck bottom end end face is provided with valve bonnet seal ring recess, and valve bonnet seal circle, valve were equipped in valve bonnet seal ring recess
Base end between valve bonnet seal circle and top end of the valve body end face by being tightly connected.
The beneficial effects of the present invention are:
1, the valve actuating mechanism in the present invention eliminates the camshaft extremely driven member in system engine air valve device, and with electricity
The mode of gas directly drives valve.Using high-speed switch valve as pilot valve, control guide's high pressure gas flows into guide's chamber, with high pressure
The pressure control bound of gas, realizes the opening and closing of valve.High-speed switch electromagnetic valve realizes control as electronic signals, breaks through
The driving mandril mechanical structure control of conventional cam formula, with the variable valve actuating mechanism based on cam structure currently on the market not
Together.
2, variable valve actuating mechanism in the prior art mainly passes through switching cam, change cam eccentric away from or other methods come
Change valve timing, but such method is fundamentally all being limited by cam line style, can only realize small range or discontinuous valve
Timing is adjusted.And controlled using electric signal control instead of traditional mechanical structure in the present invention, may be implemented it is more flexible from
By a wide range of continuous valve timing adjust.
3, the prior art is using single solenoid valve as valve actuating mechanism, and it is big can not to meet high frequency sound requirement, high-lift simultaneously
Traffic requirement.The present invention is with electromagnetic pilot driving force, pneumatically as main driving force, can make up for it valve actuating mechanism with single electromagnetism
The deficiency of driving meets the requirement such as frequency response, lift, flow while realizing that valve timing is continuously adjustable.
4, the present invention is provided with dummy piston and the design that is connected to air flue, by dummy piston and the setting for being connected to air flue,
Make the big reversed airway pressure such as dummy piston lower surface and valve upper surface receiving, balances the air intake duct gas in valve-closing
Body acts on the pressure of valve upper surface, so that the adverse effect that inlet pressure generates valve sealing is eliminated, Balance Air
Door opens the active force of back valve core entirety, reduces the requirement to guide's admission pressure.
Detailed description of the invention
Fig. 1 is the main sectional view of structure of the invention, and half view of a left side is the B-B that right half view is Fig. 4 at the A-A section of Fig. 4
At section,；
Fig. 2 is the structural main section view of valve body of the present invention,；
Fig. 3 is the structural schematic diagram of spool of the present invention；
Fig. 4 is the side view of valve body of the present invention.
In figure: valve body 1, washer 2, spool 3, equalizing piston packing ring 4, piston rod seals 5, spacing collar 6, spring 7,
Power piston sealing ring 9, gasket 10, clamp nut 11, valve deck 12, valve bonnet seal circle 13；Inlet valve gasket groove 101, air inlet
Main chamber 102, primary air inlet 103, connection air flue 104, inlet end spring cavity 105, location hole 106, inlet end elder generation guide cavity 107, valve
Lid seal groove 108, inlet end guide air inlet 109, exhaust end guide air inlet 110, exhaust end elder generation guide cavity 111, exhaust end
Spring cavity 112, main vent 113, exhaust main chamber 114, exhaust valve gasket groove 115, first step through-hole 116, second step are logical
Hole 117；Valve 301, dummy piston 302, power piston 303, power piston seal groove 304, equalizing piston packing ring slot
305, upper axis 306, lower axle 307.
Specific embodiment
The present invention that the following is further explained with reference to the attached drawings.
As shown in Figure 1, the present invention includes valve body 1, spool 3, spacing collar 6, spring 7 and valve deck 12,1 structure on two sides of valve body
Symmetrically, and inside two sides identical two inner cavities of structure are provided with, two inner cavities are respectively used to air inlet and outlet, in two inner cavities
Equipped with spool 3, spacing collar 6 and spring 7, valve deck 12 is installed on 1 top of valve body, and 12 top of valve deck is connect with high-speed switch valve, valve
1 bottom end of body connects cylinder.
As shown in Fig. 2, top, bottom end and the side wall of 1 one side structure of valve body are provided with blind hole, the blind hole of top and bottom end is same
Axis is arranged and is connected by the vertical first step through-hole 116 that diameter is less than blind hole, between bottom end and the blind hole of sidewall end
It is connected by the horizontal second step through-hole 117 that diameter is less than blind hole, the hole end surface edge of bottom end blind hole is provided with import/exhaust
Doormat ring recess 101,115, import/exhaust doormat ring recess 101,115 are equipped with washer 2；1 side wall of valve body of top blind hole top side
It is provided with the location hole 6 for location and installation bolt, bolt is for clamping spacing collar 6 so that spacing collar 6 is in top blind hole
Interior axial restraint.
Left side is air inlet side in Fig. 2, and left side structure is air intake structure, including the superposed control formed by top blind hole
Chamber processed and the main chamber formed by top blind hole positioned at lower part and the primary air inlet 103 formed by sidewall end blind hole, balance are lived
Control chamber is divided into inlet end elder generation guide cavity 107 positioned at dummy piston 302 above and below the dummy piston 302 by plug 302
Main chamber is divided into the connection air cavity of the air inlet above power piston 303 and is located at by inlet end spring cavity 105, power piston 303
The air inlet main chamber 102 of 303 lower section of power piston；107 upper end of inlet end elder generation guide cavity is inlet end guide's air inlet for air inlet
109, inlet end guide air inlet 109 is connected to high-speed switch valve outlet side.
Air inlet side fills high pressure gas to the first guide cavity of air inlet side by high-speed switch valve, and high pressure gas pushes the valve of air inlet side
Core moves down, and separates between the valve of import/exhaust side and the port of main inlet chamber, so that the gas in primary air inlet and cylinder
It is connected to and realizes air inlet.
Right side is exhaust side in Fig. 2, and right side structure is air intake structure, including the superposed control formed by top blind hole
Chamber processed and the main chamber formed by top blind hole positioned at lower part and the main vent 113 formed by sidewall end blind hole, balance are lived
Control chamber is divided into exhaust end elder generation guide cavity 111 positioned at dummy piston 302 above and below the dummy piston 302 by plug 302
Main chamber is divided into the communicating exhaust gas air cavity above power piston 303 and is located at by exhaust end spring cavity 112, power piston 303
The exhaust main chamber 114 of 303 lower section of power piston；111 upper end of exhaust end elder generation guide cavity is exhaust end guide's air inlet for exhaust
110, exhaust end guide air inlet 110 is connected to high-speed switch valve inlet end.
Exhaust side fills high pressure gas to the first guide cavity of exhaust side by high-speed switch valve, and high pressure gas pushes the valve of exhaust side
Core moves down, and separates between the valve of exhaust side and the port of main exhaust chamber, so that the gas in main vent and cylinder connects
Lead to and realizes exhaust.
The side on 1 bottom end blind hole top of valve body is equipped with connection air flue 104, as shown in figure 4, connection air flue 104 is in bias
Position, bottom end blind hole top are communicated to 1 bottom end of valve body through being connected to air flue 104, are connected to even if obtaining main chamber top through connection air flue 104
To 1 bottom end end face of valve body center, make high pressure suffered by 301 lower surface of 302 upper surface of dummy piston and valve by being connected to air flue 104
Gas pressure is equal.Spacing collar 6 is located in spring cavity, covers outside spring 7, and 6 diameter of spacing collar and power piston 303 are straight
Diameter is identical, so that limit power piston 303 and valve 301 moves down stroke.
Air inlet main chamber 102 and exhaust 114 lower end of main chamber connect with cylinder and communicate, and air inlet is connected to air cavity and communicating exhaust gas gas
Chamber is also connect with cylinder by the hole in 1 bottom end of valve body center after connection air flue 104 is communicated to together and is communicated.
As shown in figure 3, spool 3 includes power piston 303, the dummy piston 302 being sequentially coaxially fixedly connected from top to bottom
With valve 301；Pass through upper axis respectively between power piston 303 and dummy piston 302, between power piston 303 and valve 301
306 are fixedly connected with lower axle 306, and power piston 303 is connected to 306 top of axis by gasket 10 and clamp nut 11, move
The lateral circle surface of power piston 303 and dummy piston 302 has power piston seal groove 304, equalizing piston packing ring slot
305；Power piston 303 and dummy piston 302 are respectively placed in the blind hole of 1 top of valve body and bottom end, and it is blind that valve 301 is located at bottom end
Near at the hole end surface in hole.
Upper axis 306 wears first step through-hole 116 and is tightly connected by piston rod seals 5, power piston sealing ring
Power piston sealing ring 9 is installed in slot 304, power piston 303 by power piston sealing ring 9 and the side wall of top blind hole it
Between be tightly connected；Equalizing piston packing ring 4 is installed, dummy piston 302 passes through dummy piston in equalizing piston packing ring slot 305
It is tightly connected between sealing ring 4 and the side wall of bottom end blind hole；The top blind hole of 303 lower section of power piston is provided with spacing collar 6,
Upper axis 306 between spacing collar 6 and power piston 303 is cased with spring 7, and 7 both ends of spring are connected respectively to 303 bottom of power piston
6 inner bottom surface of face and spacing collar.
The through-hole for top blind hole to be connected with high-speed switch valve is provided on valve deck 12, through-hole diameter is less than valve body
Top diameter of blind hole, so that limiting power piston 303 moves up stroke.Through-hole of the high-speed switch valve outlet side through valve deck 12
It is connected with the top blind hole of valve body.12 bottom end end face of valve deck is provided with valve bonnet seal ring recess 108, sets in valve bonnet seal ring recess 108
There is valve bonnet seal circle 13,12 bottom end of valve deck between 1 top end face of valve bonnet seal circle 13 and valve body by being tightly connected.
The course of work of the invention are as follows:
Charging stage, when valve is not opened, valve is pressed on the bottom end of valve body under spring force, installs gas on valve deck
Dynamic quick connector, connection high-speed switch valve are opened as pilot valve, inlet end pilot valve, and high pressure gas enters valve actuating mechanism air inlet
The first guide cavity at end, piston moves downward for high pressure gas propulsion power, and inlet end valve is opened, and high pressure gas is flowed through by primary air inlet
Main inlet chamber, into cylinder.
After valve opening, valve upper and lower surface pressure difference declines rapidly, acts on the influence of dummy piston following table surface pressure
Increase and valve is made to generate the movement tendency closed upwards, but the air pressure balance duct by being arranged at valve body center, will pneumatically start
Machine gas in the jar is connected to dummy piston epicoele, and dummy piston upper surface and valve lower surface is made to reach pressure balance again, from
And the active force of valve opening back valve core entirety can be balanced, reduce the requirement to guide's admission pressure.
After IO Intake Valve Opens continue for some time, according to valve timing control, inlet end pilot valve is closed, first guide cavity row
Gas, the reset spring propulsion power piston upwards in spring cavity, IC Intake Valve Closes, charging stage complete.
High pressure gas completes working cycles in cylinder, and into exhaust phase, exhaust end pilot valve is opened, and high pressure gas enters
The first guide cavity of exhaust end, piston moves downward for high pressure gas propulsion power, and exhaust end valve is opened, the high pressure gas warp in cylinder
By main exhaust chamber, flowed out from main vent.
After exhaust valve persistently opens a period of time, according to valve timing control, exhaust end pilot valve is closed, exhaust end guide
Chamber exhaust, reset spring propulsion power piston upwards, exhaust valve closing, exhaust phase are completed.
Valve completes the shortest time once opened and closed less than 10ms in the present embodiment, and maximum lift has higher up to 8mm
Frequency Response and lift, while valve actuating mechanism also meets the gas supply demand of big flow, has also filled up the city of such valve actuating mechanism
Field blank.
It can be seen that structure structure of the invention is simply easily controllable, influence of the high pressure gas to piston motion is reduced,
It can overcome traditional valve actuating mechanism that can not maintain the defect of work under high pressure gas environment；It is controlled using high-speed switch electromagnetic valve
Valve actuating mechanism elder generation guide cavity drives inlet and exhaust valve, eliminates the line style constraint of actuated by cams, realizes the flexible continuous variable of port timing；
And it so that air motor is reduced high pressure gas loss, improve energy conversion efficiency, there is it to protrude significant technology
Effect.
Claims (6)
1. a kind of pneumatic pilot-operated type variable gas distribution structure of high-speed large-flow, it is characterized in that: including valve body (1), spool (3), limit
Sleeve (6), spring (7) and valve deck (12), valve body (1) structure on two sides is symmetrical, and be provided with inside two sides structure it is two identical in
Chamber, two inner cavities are respectively used to air inlet and outlet, and spool (3), spacing collar (6) and spring (7), valve are respectively arranged in two inner cavities
Body (1) top is installed by valve deck (12)；
Top, bottom end and the side wall of (1) one side structure of valve body are provided with blind hole, the blind hole of top and bottom end it is coaxially arranged and
It is connected by first step through-hole (116), is connected between bottom end and the blind hole of sidewall end by second step through-hole (117)
Logical, the hole end surface edge of bottom end blind hole is provided with import/exhaust doormat ring recess (101,115), import/exhaust doormat ring recess (101,115)
Washer (2) are installed；Valve body (1) side wall of top blind hole top side is provided with location hole (106)；
The spool (3) include the power piston (303) being sequentially coaxially fixedly connected from top to bottom, dummy piston (302) and
Valve (301)；Lead to respectively between power piston (303) and dummy piston (302), between power piston (303) and valve (301)
It crosses axis (306) to be fixedly connected with lower axle (306), power piston (303) is connected by gasket (10) and clamp nut (11)
On upper axis (306) top, the lateral circle surface of power piston (303) and dummy piston (302) has power piston seal groove
(304), equalizing piston packing ring slot (305)；Power piston (303) and dummy piston (302) be respectively placed in valve body (1) top and
In the blind hole of bottom end, near valve (301) is located at the hole end surface of bottom end blind hole；
Upper axis (306) wears first step through-hole (116) and is tightly connected by piston rod seals (5), power piston sealing
It is equipped with power piston sealing ring (9) in ring recess (304), power piston (303) is blind by power piston sealing ring (9) and top
It is tightly connected between the side wall in hole；Equalizing piston packing ring (4), dummy piston are installed in equalizing piston packing ring slot (305)
(302) by being tightly connected between equalizing piston packing ring (4) and the side wall of bottom end blind hole；Top below power piston (303)
End blind hole is provided with spacing collar (6), and the upper axis (306) between spacing collar (6) and power piston (303) is cased with spring (7),
Spring (7) both ends are connected respectively to power piston (303) bottom surface and spacing collar (6) inner bottom surface.
2. the pneumatic pilot-operated type variable gas distribution structure of a kind of high-speed large-flow according to claim 1, it is characterized in that: the valve
The inner cavity of body (1) includes superposed control chamber and the main chamber positioned at lower part, and top blind hole is made as control chamber, bottom end blind hole
For main chamber, sidewall end blind hole is as main import/exhaust mouth；Control chamber is divided on power piston (303) by power piston (303)
Main chamber is divided into positioned at dummy piston by the first guide cavity of side and the spring cavity being located at below power piston (303), dummy piston (302)
(302) the connection air cavity above and the main entry/exit air cavity below dummy piston (302), so that dummy piston (302)
Lower surface and valve (301) upper surface are equal by high-pressure gas pressure.
3. the pneumatic pilot-operated type variable gas distribution structure of a kind of high-speed large-flow according to claim 1, it is characterized in that: the valve
The side on body (1) bottom end blind hole top is equipped with connection air flue (104), and main chamber top is communicated to valve body (1) through being connected to air flue (104)
Bottom end end face center makes high pressure suffered by dummy piston (302) upper surface and valve (301) lower surface by being connected to air flue (104)
Gas pressure is equal.
4. the pneumatic pilot-operated type variable gas distribution structure of a kind of high-speed large-flow according to claim 1, it is characterized in that: described
Spacing collar (6) is located in spring cavity, covers, spacing collar (6) diameter and power piston (303) diameter phase external in spring (7)
Together, so that limit power piston (303) and valve (301) moves down stroke.
5. the pneumatic pilot-operated type variable gas distribution structure of a kind of high-speed large-flow according to claim 1, it is characterized in that: described
The through-hole for top blind hole to be connected with high-speed switch valve is provided on valve deck (12), the top that through-hole diameter is less than valve body is blind
The diameter in hole, so that limiting power piston (303) moves up stroke.
6. the pneumatic pilot-operated type variable gas distribution structure of a kind of high-speed large-flow according to claim 1, it is characterized in that: described
Valve deck (12) bottom end end face is provided with valve bonnet seal ring recess (108), is equipped with valve bonnet seal circle in valve bonnet seal ring recess (108)
(13), valve deck (12) bottom end between valve bonnet seal circle (13) and valve body (1) top end face by being tightly connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710116881.7A CN106949246B (en) | 2017-03-01 | 2017-03-01 | A kind of pneumatic pilot-operated type variable gas distribution structure of high-speed large-flow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710116881.7A CN106949246B (en) | 2017-03-01 | 2017-03-01 | A kind of pneumatic pilot-operated type variable gas distribution structure of high-speed large-flow |
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| CN106949246B true CN106949246B (en) | 2019-01-01 |
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|---|---|---|---|---|
| CN109424382B (en) * | 2017-09-04 | 2023-08-22 | 北京汽车动力总成有限公司 | Power valve control device and automobile |
| CN115986219B (en) * | 2023-01-18 | 2023-11-10 | 上海君屹工业自动化股份有限公司 | CCD guiding buffer mechanism |
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| US6315265B1 (en) * | 1999-04-14 | 2001-11-13 | Wisconsin Alumni Research Foundation | Variable valve timing actuator |
| US20040094104A1 (en) * | 2001-03-21 | 2004-05-20 | Cuadro Diogenes Perez | Hydraulic actuator for actuating a gas exchange valve of an internal combusition engine |
| CN1961138A (en) * | 2003-12-12 | 2007-05-09 | 雅各布斯车辆系统公司 | Multiple slave piston valve actuation system |
| CN101223341A (en) * | 2005-07-15 | 2008-07-16 | 汉斯-阿明·奥尔曼 | Two-stroke internal combustion engine with enhanced scavenging |
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|---|---|---|---|---|
| US6315265B1 (en) * | 1999-04-14 | 2001-11-13 | Wisconsin Alumni Research Foundation | Variable valve timing actuator |
| US20040094104A1 (en) * | 2001-03-21 | 2004-05-20 | Cuadro Diogenes Perez | Hydraulic actuator for actuating a gas exchange valve of an internal combusition engine |
| CN1961138A (en) * | 2003-12-12 | 2007-05-09 | 雅各布斯车辆系统公司 | Multiple slave piston valve actuation system |
| CN101223341A (en) * | 2005-07-15 | 2008-07-16 | 汉斯-阿明·奥尔曼 | Two-stroke internal combustion engine with enhanced scavenging |
Also Published As
| Publication number | Publication date |
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| CN106949246A (en) | 2017-07-14 |
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