CN106703928A - Exhaust valve control execution system directly driven by servo oil - Google Patents
Exhaust valve control execution system directly driven by servo oil Download PDFInfo
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- CN106703928A CN106703928A CN201611230647.9A CN201611230647A CN106703928A CN 106703928 A CN106703928 A CN 106703928A CN 201611230647 A CN201611230647 A CN 201611230647A CN 106703928 A CN106703928 A CN 106703928A
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- Prior art keywords
- valve
- piston
- servo oil
- valve rod
- rail pipe
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Classifications
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention discloses an exhaust valve control execution system directly driven by servo oil. The exhaust valve control execution system directly driven by servo oil is mounted on an exhaust valve which comprises a valve rod and a valve housing. The exhaust valve control execution system directly driven by servo oil comprises a high-pressure common rail pipe, a drive execution unit and an air spring assembly, wherein the air spring assembly is fixed to the top of the valve housing and connected with the valve rod; the drive execution unit is fixed to the top of the air spring assembly and directly connected with the high-pressure common rail pipe, and comprises a solenoid valve, a drive unit housing, a large piston, a small piston, a mechanical spring assembly and a check valve; the solenoid valve is connected with the high-pressure common rail pipe; an upper flow restriction orifice and a lower flow restriction orifice are formed in the drive unit housing; the check valve is connected to the lower flow restriction orifice and connected with the high-pressure common rail pipe; the mechanical spring assembly, the large piston and the small piston are arranged in the drive unit housing; the small piston is butted against the upper end of the valve rod; and the drive execution unit directly controls and drives the valve rod to move up and down to open and close the exhaust valve by using the high-pressure servo oil in the high-pressure common rail pipe. The exhaust valve control execution system directly driven by servo oil, disclosed by the invention, adopts direct drive to realize control of the valve rod and is few in errors, simple in structure, low in cost, long in service life and small in impact.
Description
Technical field
The present invention relates to the electro-hydraulic driving control system of high-power low-speed diesel air bleeding valve peculiar to vessel, and in particular to Yi Zhongyou
The air bleeding valve control execution system of servo oil direct drive, belongs to Diesel Engine Technique Field.
Background technology
The air bleeding valve and its control drive system of marine low speed diesel engine are one of core components of diesel engine, and it drives special
Property will directly influence the economy and emission performance of engine.The electro-hydraulic drive control of widely used air bleeding valve in the market
System is all based on the principle of indirect driving, i.e.,：By throttle orifice or check valve to execution unit in the form of high pressure or low pressure
Booster cavity full of servo oil, when air bleeding valve need open when, control unit send instruction control magnetic valve on electricity, high pressure servo
Oil drives charged piston to move upwards, and the servo oil in compression booster cavity, the high pressure servo oil for being compressed passes through servo oil pipe again
Air bleeding valve top is transferred to, drives exhasut valve stem to move downward, exhaust valve opening；When air bleeding valve will be closed, control unit hair
Instruction control magnetic valve is sent to power off, high pressure servo oil cut-out, charged piston is moved downward, and the servo oil pressure in booster cavity is rapid
Reduce, exhasut valve stem is moved, exhaust valve closure upwards in the presence of air spring.Due to the different of operating mode, processing and assembling
The error of presence, cylinder repairing and leak case are inconsistent, or in each action process parts accidental situation, said system
Valve rod travel can be caused not reach predetermined value even fail, so as to have a strong impact on performance and the discharge of diesel engine.
The content of the invention
It is an object of the invention to overcome the shortcomings of that prior art is present, there is provided a kind of row by servo oil direct drive
Air Valve Control execution system, while system composition is simplified, realizes the keying control of air discharging valve bar, improves exhaust and takes a breath
Efficiency, and extend the service life that system respectively constitutes parts.
To achieve the above object, technical solution of the invention is as follows：
A kind of air bleeding valve by servo oil direct drive controls execution system, and on air bleeding valve, the air bleeding valve includes
There are valve rod and valve casing, it is characterised in that the air bleeding valve control execution system includes the high-pressure common-rail pipe of conveying servo oil, drives
Execution unit and air spring assembly；
The air spring assembly is fixed on the top of the valve casing and is connected with the valve rod；
The driving execution unit is fixed on the top of the air spring assembly and is directly connected to the high-pressure common-rail pipe,
Including magnetic valve, driver element housing, big piston, valve piston, mechanical spring packs and check valve, the magnetic valve is installed on institute
State on driver element housing, positioned at the driving execution unit topmost and be connected with the high-pressure common-rail pipe, the driving
Unit housings are fixed on the air spring assembly, and are provided with throttle orifice and lower throttle orifice from top to bottom, described unidirectional
Valve is connected on the lower throttle orifice and is connected with the high-pressure common-rail pipe, and the mechanical spring packs, big piston and valve piston are certainly
Above it is arranged within the driver element housing, the valve piston presses on the upper end of the valve rod lower sequential；
The high-pressure common-rail pipe is multi-path fuel feed pump, and high drive pressure is provided to the driving execution unit；
It is described to drive execution unit using the high pressure servo oil in the high-pressure common-rail pipe, directly control and drive the valve
Bar moves up and down to open and close the air bleeding valve.
Further, the stroke of described valve rod is determined and can be led to by the height of the upper throttle orifice and lower throttle orifice
Cross and change the height of throttle orifice and lower throttle orifice on this and be finely adjusted.
Further, described driver element housing includes two-stage cylindrical hole, is provided with the bottom surface of first order cylindrical hole
Hydraulic cushion groove, to reduce shock of the big piston to the driver element housing when the valve rod is opened.
Further, the bottom of described big piston is provided with groove, and the valve piston is reduced with when the valve rod is closed
For the shock of the big piston.
Further, the top of described valve piston is circular conical surface, is play the guiding role with when the valve rod is closed, and
In the valve rod maintenance stage throttle effect is collectively forming with the lower throttle orifice；The choke valve and the throttle effect collective effect energy
The self adaptation of the valve piston epicoele driving pressure under valve rod maintenance stage different loads is enough realized, and reduces servo oil damage
Lose.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, the high-pressure common-rail pipe for driving execution unit to be directly connected to servo oil of the invention, using the electro-hydraulic row of direct drive
Air valve control system, instead of by repairing, supercharging to realize traditional electrichydraulic control drive system that valve rod is opened and closed indirectly；Phase
Than in the indirect exhaust valve actuating mechanism for driving, The present invention reduces a set of repairing and pressurizing pack, not only simplify structure, and
And can effectively prevent because repairing, the leakage valve rod aperture that differs and cause are inconsistent, or even the phenomenon that air bleeding valve is not opened.
2nd, servo oil high-pressure common-rail pipe is directly connected to drive execution unit, effectively reduces the pressure drop for driving servo oil, carries
Air bleeding valve high controls the execution efficiency of execution system.
3rd, the valve rod travel of air bleeding valve control execution system can by change the height of upper and lower throttle orifice carry out it is micro-
Adjust.
4th, buffer structure is employed between each motion parts of the present invention, hard collision can be prevented effectively from, improve and be
The service life of system.
5th, the present invention effectively reduces processing and assembly difficulty, and greatly reduces the processing of whole device and be manufactured into
This.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 is the schematic diagram of valve rod opening process.
Fig. 3 is the schematic diagram of valve rod closing process.
Fig. 4 is the schematic diagram of expanded application of the present invention.
In figure：
1 valve rod, 2 valve seats, 3 valve casings, 4 individual event orifice valves, 5 air spring assemblies, 6 check valves, throttle orifice on 7,8 times throttlings
Hole, 9 driver element housings, 10 valve pistons, 11 big pistons, 12 mechanical spring packs, 13 magnetic valves, 14 high-pressure common-rail pipes.
Specific embodiment
The air bleeding valve control by servo oil direct drive of the present invention is held with specific embodiment below in conjunction with the accompanying drawings
Row system is further elaborated, but should not be limited the scope of the invention with this.
Refer to Fig. 1, it is illustrated that be arranged on air bleeding valve by the air bleeding valve control execution system of servo oil direct drive, the row
Air valve includes valve rod 1, valve seat 2 and valve casing 3；Air bleeding valve control execution system includes being used to the high-pressure common rail for conveying servo oil
Pipe 14, driving execution unit and air spring assembly 5.
The air spring assembly 5 is fixed on the top of the valve casing 3 of the air bleeding valve, and is connected with the valve rod 1, should
The bottom of air spring assembly 5 is provided with individual event orifice valve 4.
The driving execution unit is fixed on the top of the air spring assembly 5, and it is common to be directly connected to the high pressure
Rail pipe 14；The driving execution unit includes magnetic valve 13, driver element housing 9, big piston 11, valve piston 10, mechanical spring group
Part 12 and check valve 6.It is described to drive execution unit using the high pressure servo oil in the high-pressure common-rail pipe 14, directly control and drive
The dynamic valve rod 1 moves up and down, to open and close the air bleeding valve.
The magnetic valve 13 is the 2/2-way magnetic valve of big flow, is installed on the driver element housing 9, by
Electricity and dead electricity control the opening and closing of the valve rod 1 of the air bleeding valve.The magnetic valve 13 is located at the driving execution unit most
Top, and be connected with the high-pressure common-rail pipe 14.
The driver element housing 9 is fixed on the air spring assembly 5, and is provided with throttle orifice 7 from top to bottom
With lower throttle orifice 8；Described check valve 6 is installed at the lower throttle orifice 8 and is connected with the high-pressure common-rail pipe 14, for preventing
Servo oil in oil return circuit is blowed back into drive system.
The stroke of described valve rod 1 is determined by the height of the upper throttle orifice 7 and lower throttle orifice 8, and is somebody's turn to do by changing
The height of upper throttle orifice 7 and lower throttle orifice 8 can be finely adjusted to the stroke of the valve rod 1.Described upper throttle orifice 7 and lower throttling
The driving oil pressure of the upper end of valve piston 10 can be down to maintenance load institute by hole 8 when the valve piston 10 moves to end of travel
The pressure value for needing, and the servo oil consumption of the stroke maintenance stage of the valve rod 1 is reduced,
The mechanical spring packs 12, big piston 11 and valve piston 10 are arranged within the driver element housing 9, and
Arrange in order from top to bottom；The valve piston 10 presses on the upper end of the valve rod 1.
The face of cylinder top of described valve piston 10 is circular conical surface form, to ensure leading in the closing process of the valve rod 1
To effect, while the circular conical surface is collectively forming throttle effect in the maintenance stage of valve rod 1 with the lower throttle orifice 8 for installing check valve 6；Institute
Check valve 6 and the throttle effect collective effect are stated, the valve piston epicoele under valve rod maintenance stage different loads can be realized
The self adaptation of driving pressure, and reduce servo oil loss.
The driving execution unit employs various buffering methods, can there is the impulsive force reduced between each movement parts.
Described driver element housing 9 includes two-stage cylindrical hole, is driven in unlatching and maintenance process for the valve rod 1
The transformation of power；The bottom surface of first order cylindrical hole is provided with hydraulic cushion groove, for reducing the big work when valve rod 1 is opened
11 pairs of shocks of the driver element housing 9 of plug.
The bottom of the big piston 11 is provided with groove, during for reducing the closing of the valve rod 1 described in the valve piston 10 pairs
The impact of big piston 11.
Described mechanical spring packs 12 can play cushioning effect when the valve rod 1 is closed.
Described lower throttle orifice 8 and check valve 6 can play a part of buffering and surge suppressing.
The high-pressure common-rail pipe 14 is multi-path fuel feed pump, is directly connected to the driving execution unit and is performed to the driving
Unit provides the high drive pressure of stabilization, while collecting the oil return driven in oil circuit.
The present invention replaces realizing that valve rod 1 is opened and closed indirectly by repairing, supercharging using the electrohydraulic control system of direct drive
Electrichydraulic control drive system.Concrete operating principle of the invention is as follows：
Air bleeding valve exhaust process is as shown in Figure 2.Control system (not shown) sends control signal, and magnetic valve 13 leads to
Electricity, the servo of the high pressure all the way oil drawn by high-pressure common-rail pipe 14, directly enters the big piston for driving execution unit through magnetic valve 13
11 epicoeles (Fig. 2 positions a), and promote valve piston 10 and valve rod 1 to overcome the resistance of cylinder back pressure and air spring assembly 5 and will arrange
Air valve is opened, simultaneously because driving force is larger when valve rod 1 is opened, to prevent big piston 11 from directly impinging driver element housing 9,
Hydraulic cushion groove is provided with driver element housing 9；After big piston 11 reaches mechanical position limitation, on driver element housing 9
Oil circuit is opened, and high pressure servo-drive oil enters the epicoele of valve piston 10 (Fig. 2 positions b), and continuing through thus loop and upper throttle orifice 7
Valve rod 1 is promoted to continue to open until setting stroke, meanwhile, when valve piston 10 drives valve rod 1 to reach travel set point, valve piston
The driving servo oil of 10 epicoeles be connected with oil return circuit through lower throttle orifice 8 and check valve 6 (Fig. 2 positions c), due to upper throttle orifice 7,
The metering function formed between lower throttle orifice 8 and the conical surface and driver element housing 9 of valve piston 10 so that the epicoele of valve piston 10
Driving servo oil oil pressure can maintain a particular value, and this value can change with the change of load, with certain adaptive
Ying Xing.
Exhaust valve closure process is as shown in Figure 3.Control system (not shown) sends control signal, and magnetic valve 13 loses
Electricity, valve rod 1 promotes valve piston 10 to move upwards under the active force of cylinder residual pressure and air spring assembly 5, and operation one is small
After segment distance, the lower throttle orifice 8 for installing check valve 6 is blocked completely, and the servo of the epicoele of valve piston 10 oil is through upper throttle orifice 7 times
To the epicoele of big piston 11, and it is connected with the drainback passage in high-pressure common-rail pipe 14 (Fig. 3 positions a) through magnetic valve 13；Work as valve piston
When the servo oil of 10 epicoeles cannot be discharged from upper throttle orifice 7 in time, the part servo oil will produce certain pressure (by air bleeding valve
Cylinder and air spring pressure during closing are determined) and promote big piston 11 to move upwards, while by the epicoele of valve piston 10 and
The way to cycle oil cut-out of the big epicoele of piston 11, forms a pressure chamber for closing between valve piston 10 and big piston 11, until fortune
The position shown in the b of Fig. 3 positions is moved, this chamber communicates with the oil return circuit of the lower end of big piston 11, servo oil is directly returned through this oil circuit
To common rail pipe (Fig. 3 positions c).The top of the big piston 11 is furnished with mechanical spring packs 12, and bottom uses form of grooves, can avoid
Big shock between piston 11 and valve piston 10, the contiguous block of big piston 11 and magnetic valve 13, valve rod 1 and valve seat 2, and play slow
The effect of pressure oscillation in punching and suppression system.
Fig. 4 is one of expanded application of the invention.As shown in figure 4, the opening procedure of air bleeding valve and the complete phase of above-mentioned situation
Together, then in the absence of by the situation of way to cycle oil cut-out at upper throttle orifice 7 when valve rod 1 is closed, i.e., when servo oil cannot in time from upper
When throttle orifice 7 is discharged, under the promotion of air spring assembly 5 and cylinder back pressure, big piston 11 touches top and compressor mechanical bullet in advance
Spring component 12, until big servo oil between piston 11 and valve piston 10 is completely exhausted out by throttle orifice, to valve piston 10 with it is big
Shock between piston 11, valve rod 1 and valve seat 2 can play cushioning effect.
Above are only the preferred embodiments of the present invention, it must further be noted that, those skilled in the art is all according to the present invention
Various equivalent modifications, change and amendment that application content is made, should all turn into the protection domain of patent of the present invention.
Claims (5)
1. a kind of air bleeding valve by servo oil direct drive controls execution system, and on air bleeding valve, the air bleeding valve is included
Valve rod and valve casing, it is characterised in that the air bleeding valve control execution system includes that the high-pressure common-rail pipe of conveying servo oil, driving are held
Row unit and air spring assembly；
The air spring assembly is fixed on the top of the valve casing and is connected with the valve rod；
The driving execution unit is fixed on the top of the air spring assembly and is directly connected to the high-pressure common-rail pipe, including
Magnetic valve, driver element housing, big piston, valve piston, mechanical spring packs and check valve, the magnetic valve are installed on the drive
On moving cell housing, positioned at the driving execution unit topmost and be connected with the high-pressure common-rail pipe, the driver element
Housing is fixed on the air spring assembly, and is provided with throttle orifice and lower throttle orifice from top to bottom, and the check valve connects
Be connected on the lower throttle orifice and be connected with the high-pressure common-rail pipe, the mechanical spring packs, big piston and valve piston from upper and
It is arranged within the driver element housing, the valve piston presses on the upper end of the valve rod lower sequential；
The high-pressure common-rail pipe is multi-path fuel feed pump, and high drive pressure is provided to the driving execution unit；
It is described to drive execution unit using the high pressure servo oil in the high-pressure common-rail pipe, directly control and drive on the valve rod
It is lower to move to open and close the air bleeding valve.
2. the air bleeding valve by servo oil direct drive according to claim 1 controls execution system, it is characterised in that：It is described
Valve rod stroke by the height of the upper throttle orifice and lower throttle orifice determine and can by change on this throttle orifice and under
The height of throttle orifice is finely adjusted.
3. the air bleeding valve by servo oil direct drive according to claim 1 controls execution system, it is characterised in that：It is described
Driver element housing include two-stage cylindrical hole, the bottom surface of first order cylindrical hole is provided with hydraulic cushion groove, with the valve
Bar reduces shock of the big piston to the driver element housing when opening.
4. the air bleeding valve by servo oil direct drive according to claim 1 controls execution system, it is characterised in that：It is described
The bottom of big piston be provided with groove, to reduce shock of the valve piston for the big piston when the valve rod is closed.
5. the air bleeding valve by servo oil direct drive according to claim 1 controls execution system, it is characterised in that：It is described
Valve piston top be circular conical surface, play the guiding role with when the valve rod is closed, and the valve rod maintenance stage with it is described
Lower throttle orifice is collectively forming throttle effect；The check valve can be realized in the valve rod maintenance stage with the throttle effect collective effect
The self adaptation of the valve piston epicoele driving pressure under different loads, and reduce servo oil loss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611230647.9A CN106703928B (en) | 2016-12-28 | 2016-12-28 | Exhaust valve control execution system directly driven by servo oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611230647.9A CN106703928B (en) | 2016-12-28 | 2016-12-28 | Exhaust valve control execution system directly driven by servo oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106703928A true CN106703928A (en) | 2017-05-24 |
| CN106703928B CN106703928B (en) | 2022-07-15 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611230647.9A Active CN106703928B (en) | 2016-12-28 | 2016-12-28 | Exhaust valve control execution system directly driven by servo oil |
Country Status (1)
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| CN (1) | CN106703928B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107965605A (en) * | 2017-12-29 | 2018-04-27 | 中船动力研究院有限公司 | A kind of gerotor type air bleeding valve |
| CN109372607A (en) * | 2018-10-23 | 2019-02-22 | 中船动力研究院有限公司 | Multistage draining exhaust valve and its working method |
| CN109404363A (en) * | 2018-10-30 | 2019-03-01 | 中船动力研究院有限公司 | For driving the hydraulic cylinder and its working method of exhaust valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107965605A (en) * | 2017-12-29 | 2018-04-27 | 中船动力研究院有限公司 | A kind of gerotor type air bleeding valve |
| CN109372607A (en) * | 2018-10-23 | 2019-02-22 | 中船动力研究院有限公司 | Multistage draining exhaust valve and its working method |
| CN109404363A (en) * | 2018-10-30 | 2019-03-01 | 中船动力研究院有限公司 | For driving the hydraulic cylinder and its working method of exhaust valve |
| CN109404363B (en) * | 2018-10-30 | 2020-09-15 | 中船动力研究院有限公司 | Hydraulic cylinder for driving exhaust valve and working method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106703928B (en) | 2022-07-15 |
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