CN105485407A - Gas exhaust valve drive system with stroke capable of being compensated and regulated - Google Patents
Gas exhaust valve drive system with stroke capable of being compensated and regulated Download PDFInfo
- Publication number
- CN105485407A CN105485407A CN201511007592.0A CN201511007592A CN105485407A CN 105485407 A CN105485407 A CN 105485407A CN 201511007592 A CN201511007592 A CN 201511007592A CN 105485407 A CN105485407 A CN 105485407A
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- Prior art keywords
- valve
- stroke
- outlet valve
- valve rod
- compensation regulation
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Classifications
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention discloses a gas exhaust valve drive system with stroke capable of being compensated and regulated. The gas exhaust valve drive system comprises a low-voltage servo drive oil supply device, a stroke compensating and regulating module, a high-voltage common rail unit, a control implementation unit, a gas exhaust valve and a drive device thereof, wherein the stroke of a valve rod of the gas exhaust valve is adjustable; oil supply pressure of the low-voltage servo drive oil supply device can be flexibly regulated according to needs by virtue of a pressure compensating valve; the stroke compensating and regulating module is used for flexibly regulating the valve rod stoke and keeping the valve rod stroke at a required position according to a valve rod displacement or air cylinder pressure feedback signal; meanwhile, valve rod closing buffer time is flexibly regulated by virtue of a variable throttle at an outlet of a proportional flow valve, so that impact force when the valve rod is dropped is reduced; and opening and closing of the valve rod are controlled by the high-voltage common rail unit and the control implementation unit. According to the gas exhaust valve drive system, flexible adjustment of valve rod stroke, opening, buffering and closing time is realized, impact force when the valve rod is dropped is effectively reduced, control freedom of a diesel engine gas exhaust system is improved, gas exhaust consistency of each cylinder is improved, and the service life of the system is prolonged, and therefore, the gas exhaust valve drive system is suitable for internal combustion engines with different cylinder diameters, different performances and different exhaust needs.
Description
Technical field
The present invention relates to a kind of electrichydraulic control formula outlet valve stroke Compensation Regulation drive system, be specifically related to a kind of high-power low-speed diesel outlet valve regulating and controlling drive system peculiar to vessel, belong to Diesel Engine Technique Field.
Background technique
Marine low speed diesel engine outlet valve and control-driven system thereof are one of core components of diesel engine, its drive performance directly determines the gas organizational process in cylinder, and then affect in-cylinder combustion process, finally can bring direct impact to the Economy of motor, emission performance.The unlatching, closing velocity etc. of the exhaust advance angle in exhaust process, exhaust duration and outlet valve all can be exchanged makings amount and be produced vital impact.The exhaust gear that control freedom degree is large, reliability is high for ensure the good service behaviour of diesel engine and working life significant.
Now widely used electrichydraulic control formula outlet valve drive system, its working principle is: when outlet valve needs to open, control unit sends instruction Controlling solenoid valve and powers on, high pressure servo oil drives charged piston to move upward, servo oil in compression booster cavity, passed to outlet valve top by the high pressure servo oil compressed by servo oil pipe, drive exhasut valve stem to move downward, exhaust valve opening; When outlet valve will be closed, control unit sends the power-off of instruction Controlling solenoid valve, and high pressure servo oil cuts off, and charged piston moves downward, and in booster cavity, servo oil pressure reduces rapidly, and exhasut valve stem, under the effect of pneumatic spring, moves upward.Booster cavity volume in this type systematic is fixed, valve rod travel cannot regulate according to different duty requirements, gas exhaust inspecting degrees of freedom is little, and due to the processing of system, assembling and system cloud gray model time the difference that exists and cannot ensure outlet valve reach design runlength or make each cylinder, each circulation has consistent stroke, thus cause the ventilation quality of each cylinder of diesel engine under each operating mode to differ, thus affect diesel engine performance.
Summary of the invention
The object of the invention is to the deficiency overcoming prior art existence, there is provided a kind of stroke can the outlet valve drive system of Compensation Regulation, by setting up servo oil low voltage control oil circuit and Compensation Regulation module, realize flexible, the Flexible Control of air discharging valve bar stroke, thus significantly improve cylinder exhaust effect, improve ventilation quality, improve diesel combustion characteristic and effectively control toxic emission.
For achieving the above object, technical solution of the present invention is as follows:
Stroke can the outlet valve drive system of Compensation Regulation, comprises low pressure servo and drives fluid supply apparatus, stroke Compensation Regulation module, high-pressure common rail unit, controls performance element and outlet valve and drive unit thereof;
Described low pressure servo drives fluid supply apparatus to connect described stroke Compensation Regulation module and provides pressure stability and the adjustable low pressure servo of load-sensitive drives oil to the trip Compensation Regulation module;
Performance element and outlet valve and drive unit thereof is controlled described in described stroke Compensation Regulation model calling, according to the stroke of the displacement of valve rod of described outlet valve or this valve rod of feedback signal Compensation Regulation of cylinder pressure, flexible adjustable flexibly with the stroke realizing this valve rod, regulate the closedown buffer time of described valve rod to reduce impact force when this valve rod is taken a seat simultaneously;
Described high-pressure common rail unit is multi-path fuel supply line, connects described control performance element and provides stable high drive pressure to this control performance element, and the drive unit simultaneously to described outlet valve supplements required high pressure servo oil;
Described control performance element connects described outlet valve and drive unit thereof, for controlling the opening and closing of described outlet valve;
The high pressure servo oil that described outlet valve and drive unit thereof are provided by described control performance element drives described valve rod and performs exhaust event.
Further, described low pressure servo drives fluid supply apparatus to comprise fuel tank, one-way valve, filter, variable displacement pump, variable-frequency motor, pressure-compensated valve, relief valve and position control valve.
Further, described stroke Compensation Regulation module comprises proportional flow control valve, compensates oil pocket, Compensation Regulation piston and variable throttler.
Further, described proportional flow control valve adopts three two logical proportional flow solenoid valves or three two logical position control valves.
Further, described variable throttler is installed on the outlet port of described proportional flow control valve.
Further, described control performance element adopts size piston supercharged structure, the driving mechanism comprising flow controller, control valve and be made up of small piston and large piston, after described large piston movement one segment distance is spacing, described small piston still continues operation one section and moves.
Further, described control valve is two-position four-way solenoid valve.
Further, described outlet valve and drive unit thereof comprise driven plunger, valve rod and throttle orifice.
Further, the valve rod of described outlet valve is provided with displacement transducer, in cylinder, pressure transducer is installed.
Compared with prior art, the invention has the beneficial effects as follows:
1, while not changing original outlet valve system, driving fluid supply apparatus and stroke Compensation Regulation module to achieve the adjustable flexibly of valve rod travel by increasing a set of low pressure servo, improve the control freedom degree of diesel engine exhaust system.
2, adopt variable throttler, the impact force when valve rod that can effectively reduce outlet valve is taken a seat, and buffer time of taking a seat can be adjusted according to demand.
3, the difference of each operating mode exhaust of each cylinder that diesel engine causes because of processing, assembling and operation difference is compensated, efficiently solve the consistency problem in exhaust process.
4, described system can realize modular applications, can meet the internal-combustion engine of different cylinder diameter, different performance and different emissions requirements simultaneously, greatly reduce cost.
Accompanying drawing explanation
Fig. 1 is system schematic of the present invention.
In figure:
1 fuel tank, 2 one-way valves, 3 filters, 4 variable displacement pumps, 5 variable-frequency motors, 6 pressure-compensated valves, 7 relief valves, 8 position control valves, 9 one-way valves, 10 proportional flow control valves, 11 variable throttlers, 12 Compensation Regulation pistons, 13 compensate oil pocket, 14 driven plunger, 15 valve rods, 16 throttle orifices, 17 small pistons, 18 large pistons, 19 control valves, 20 high-pressure common rail unit, 21 pressure transducers, 22 displacement transducers, 23 flow controllers.
Embodiment
Below in conjunction with the drawings and specific embodiments, stroke of the present invention the outlet valve drive system of Compensation Regulation can be done and further elaborate, but should not limit the scope of the invention with this.
Refer to Fig. 1, stroke of the present invention the outlet valve drive system of Compensation Regulation can comprise low pressure servo and drives fluid supply apparatus, stroke Compensation Regulation module, high-pressure common rail unit 20, controls performance element and outlet valve and drive unit thereof.
Described low pressure servo drives fluid supply apparatus to connect described stroke Compensation Regulation module and provides pressure stability and the adjustable low pressure servo of load-sensitive drives oil to the trip Compensation Regulation module.Described low pressure servo drives fluid supply apparatus to comprise fuel tank 1, one-way valve 2, filter 3, variable displacement pump 4, variable-frequency motor 5, pressure-compensated valve 6, relief valve 7, position control valve 8, one-way valve 9 and corresponding connecting pipeline; Described variable-frequency motor 5 and variable displacement pump 4 make outlet pressure and flow can free adjusting, and described pressure-compensated valve 6 makes the outlet pressure of oil pump with load variations, effectively can save the energy.Low pressure servo drives oil from fuel tank 1 after filter 3, entering variable pump 4, then the filler opening place being delivered to stroke Compensation Regulation module through one-way valve 9.
Performance element and outlet valve and drive unit thereof is controlled described in described stroke Compensation Regulation model calling, can according to the stroke of this valve rod 15 of feedback signal Compensation Regulation of the displacement of valve rod of described outlet valve or cylinder pressure, flexible adjustable flexibly with the stroke realizing this valve rod 15, regulate the closedown buffer time of described valve rod 15 to reduce impact force when this valve rod 15 is taken a seat simultaneously.Described stroke Compensation Regulation module comprises proportional flow control valve 10, compensates oil pocket 13, Compensation Regulation piston 12 and variable throttler 11; Described variable throttler 11 is installed on the outlet port of described proportional flow control valve 10, and this variable throttler 11 can select automatically controlled or Manual adjustable flow controller according to demand; Described proportional flow control valve 1 adopts three two logical proportional flow solenoid valves or three two logical position control valves.Described valve rod 15 is provided with displacement transducer 22, for detecting the displacement of valve rod 15 in real time, and feed back to control system (not shown), control system according to actual needs, control ratio Flow valve 10, and then drive Compensation Regulation piston 12, realize the Compensation Regulation of valve rod 15 stroke.Pressure transducer 21 is installed in described cylinder.Described compensation oil pocket 13 and Compensation Regulation piston 12 can according to the demand flexible processings of stroke adjustment scope.
Described high-pressure common rail unit 20 is multi-path fuel supply line, connect described control performance element, this high-pressure common rail unit 20 is responsible for providing stable high drive pressure to described control performance element, and the drive unit simultaneously to described outlet valve supplements required high pressure servo oil.
Described outlet valve and drive unit thereof comprise driven plunger 14, valve rod 15 and throttle orifice 16 etc., and the high pressure servo oil provided by described control performance element drives described driven plunger 14, opens described valve rod 15 and performs exhaust event.
Described control performance element connects described outlet valve and drive unit thereof, for controlling the opening and closing of described outlet valve.This control performance element adopts size piston supercharged structure, the driving mechanism comprising flow controller 23, control valve 19 and be made up of small piston 17 and large piston 18, described large piston 18 move a segment distance spacing after, described small piston 17 still continues operation one section and moves.Described control valve 19 can be two-position four-way solenoid valve.
Specific works principle of the present invention is as follows: when outlet valve is failure to actuate, and each component locations as shown in Figure 1.The one road high pressure oil of being drawn by high-pressure common rail unit 20, enters small piston 17 epicoele and compensation oil pocket 13 that control performance element through flow controller 23.When diesel engine needs exhaust, control system (not shown) sends control signal, and control valve 19 is energized, and the high pressure oil that high-pressure common rail unit 20 provides enters the lower end of the large piston 18 controlling performance element through control valve 19, and promotes small piston 17, the servo oil entered by flow controller 23 is pressurized, and is delivered to driven plunger 14 epicoele through pressure duct, and promotes driven plunger 14 to overcome cylinder back pressure and opened by outlet valve to be exhausted, the displacement signal detected is fed back to control system by the displacement transducer 22 be now arranged on valve rod 15, when valve rod 15 displacement is less than desirable stroke, control system sends control signal, proportional flow control valve 10 is made to be placed in right position, position control valve 8 is placed in left position, due to the effect of pressure-compensated valve 6, low pressure servo drives oil by the Output pressure (depending on the setting of pressure-compensated valve 6) being greater than load certain value, and through one-way valve 2, variable displacement pump 4, one-way valve 9 and proportional flow control valve 10 and enter the upper end of Compensation Regulation piston 12, because on Compensation Regulation piston 12, end pressure is greater than lower end pressure, therefore Compensation Regulation piston 12 can promote the servo oil in compensation oil pocket 13, and make driven plunger 14 continue feedback signal that is descending so that displacement transducer 22 to reach desirable stroke, control system control ratio Flow valve 10 and position control valve 8 switch to meta respectively and right position keeps exhaust, at the end of diesel exhaust gas, control system sends control signal, control valve 19 power-off, the oil pocket of small piston 17 and large piston 18 lower end connects oil circuit, small piston 17 upper cavity pressure reduces, valve rod 15 is because the effect closedown of pneumatic spring is until small piston 17 is taken a seat, now valve rod 15 is closed not yet completely, proportional flow control valve 10 can be switched to right position according to the feedback signal of displacement transducer 22 by control system, and the shut-in time of valve rod 15 can be controlled according to demand by the openings of sizes and variable throttler 11 regulating proportional flow control valve 10, simultaneously, because low pressure servo drives the left and right of oil, impact force when valve rod 15 is taken a seat will reduce greatly.
Described stroke Compensation Regulation module is that stroke of the present invention can the critical component of outlet valve drive system of Compensation Regulation, can buffer time when taking a seat of free adjusting valve rod travel compensating length, time and valve rod and cushion effect.Wherein, described proportional flow control valve 10 directly controls stroke compensation and valve rod cushions process of taking a seat, and makes system have higher control accuracy and control freedom degree; The low pressure servo of system drives fluid supply apparatus to be provided with described pressure-compensated valve 6, automatically can regulate the outlet pressure of described variable displacement pump 4 according to the load variations of described compensation oil pocket 13, saves the energy, reduces consumption.In addition, pressure surge when described compensation oil pocket 13 also stabilizes described valve rod 15 action to a certain extent.
Above are only the preferred embodiments of the present invention, it must be noted that, the various equivalent modifications that those skilled in the art is all to be done according to the present patent application content, change and correction, all should become the protection domain of patent of the present invention.
Claims (9)
1. stroke can the outlet valve drive system of Compensation Regulation, it is characterized in that, comprises low pressure servo and drives fluid supply apparatus, stroke Compensation Regulation module, high-pressure common rail unit, controls performance element and outlet valve and drive unit thereof;
Described low pressure servo drives fluid supply apparatus to connect described stroke Compensation Regulation module and provides pressure stability and the adjustable low pressure servo of load-sensitive drives oil to the trip Compensation Regulation module;
Performance element and outlet valve and drive unit thereof is controlled described in described stroke Compensation Regulation model calling, according to the stroke of the displacement of valve rod of described outlet valve or this valve rod of feedback signal Compensation Regulation of cylinder pressure, flexible adjustable flexibly with the stroke realizing this valve rod, regulate the closedown buffer time of described valve rod to reduce impact force when this valve rod is taken a seat simultaneously;
Described high-pressure common rail unit is multi-path fuel supply line, connects described control performance element and provides stable high drive pressure to this control performance element, and the drive unit simultaneously to described outlet valve supplements required high pressure servo oil;
Described control performance element connects described outlet valve and drive unit thereof, for controlling the opening and closing of described outlet valve;
The high pressure servo oil that described outlet valve and drive unit thereof are provided by described control performance element drives described valve rod and performs exhaust event.
2. stroke according to claim 1 can the outlet valve drive system of Compensation Regulation, it is characterized in that: described low pressure servo drives fluid supply apparatus to comprise fuel tank, one-way valve, filter, variable displacement pump, variable-frequency motor, pressure-compensated valve, relief valve and position control valve.
3. stroke according to claim 1 can the outlet valve drive system of Compensation Regulation, it is characterized in that: described stroke Compensation Regulation module comprises proportional flow control valve, compensates oil pocket, Compensation Regulation piston and variable throttler.
4. stroke according to claim 3 can the outlet valve drive system of Compensation Regulation, it is characterized in that: described proportional flow control valve adopts three two logical proportional flow solenoid valves or three two logical position control valves.
5. stroke according to claim 3 can the outlet valve drive system of Compensation Regulation, it is characterized in that: described variable throttler is installed on the outlet port of described proportional flow control valve.
6. stroke according to claim 1 can the outlet valve drive system of Compensation Regulation, it is characterized in that: described control performance element adopts size piston supercharged structure, the driving mechanism comprising flow controller, control valve and be made up of small piston and large piston, after described large piston movement one segment distance is spacing, described small piston still continues operation one section and moves.
7. stroke according to claim 6 can the outlet valve drive system of Compensation Regulation, it is characterized in that: described control valve is two-position four-way solenoid valve.
8. stroke according to claim 1 can the outlet valve drive system of Compensation Regulation, it is characterized in that: described outlet valve and drive unit thereof comprise driven plunger, valve rod and throttle orifice.
9. stroke according to claim 1 can the outlet valve drive system of Compensation Regulation, it is characterized in that: the valve rod of described outlet valve is provided with displacement transducer, is provided with pressure transducer in cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511007592.0A CN105485407A (en) | 2015-12-29 | 2015-12-29 | Gas exhaust valve drive system with stroke capable of being compensated and regulated |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511007592.0A CN105485407A (en) | 2015-12-29 | 2015-12-29 | Gas exhaust valve drive system with stroke capable of being compensated and regulated |
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| Publication Number | Publication Date |
|---|---|
| CN105485407A true CN105485407A (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511007592.0A Pending CN105485407A (en) | 2015-12-29 | 2015-12-29 | Gas exhaust valve drive system with stroke capable of being compensated and regulated |
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| CN (1) | CN105485407A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641074A (en) * | 2017-03-01 | 2017-05-10 | 山东科技大学 | Intelligent feedback type variable throttling buffering system and method |
| CN106703928A (en) * | 2016-12-28 | 2017-05-24 | 沪东重机有限公司 | Exhaust valve control execution system directly driven by servo oil |
| CN107420602A (en) * | 2016-05-24 | 2017-12-01 | Vag阀门有限公司 | Ventilation and/or air bleeding valve |
| CN111810500A (en) * | 2019-04-11 | 2020-10-23 | 活塞动力有限责任公司 | Hydraulic amplifier arrangement |
| CN114035489A (en) * | 2021-09-28 | 2022-02-11 | 广州极飞科技股份有限公司 | Gate valve control method and system, gate valve and computer readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107420602A (en) * | 2016-05-24 | 2017-12-01 | Vag阀门有限公司 | Ventilation and/or air bleeding valve |
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| CN111810500A (en) * | 2019-04-11 | 2020-10-23 | 活塞动力有限责任公司 | Hydraulic amplifier arrangement |
| CN114035489A (en) * | 2021-09-28 | 2022-02-11 | 广州极飞科技股份有限公司 | Gate valve control method and system, gate valve and computer readable storage medium |
| CN114035489B (en) * | 2021-09-28 | 2023-12-05 | 广州极飞科技股份有限公司 | Gate valve control method and system thereof, gate valve and computer readable storage medium |
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Application publication date: 20160413 |
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