CN209244627U - Multistage draining exhaust valve - Google Patents
Multistage draining exhaust valve Download PDFInfo
- Publication number
- CN209244627U CN209244627U CN201821722478.5U CN201821722478U CN209244627U CN 209244627 U CN209244627 U CN 209244627U CN 201821722478 U CN201821722478 U CN 201821722478U CN 209244627 U CN209244627 U CN 209244627U
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- exhaust valve
- valve
- driving piston
- multistage
- drive shell
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Abstract
Technical solutions of the utility model disclose a kind of multistage draining exhaust valve, the drive shell that is detachably connected including valve casing, with the valve casing, the valve rod being telescopically installed in the valve casing, with the valve stem contacts and the air spring being fixed in the drive shell and the driving piston for being installed in the drive shell and being contacted with the valve stem end.The multistage draining exhaust valve of the utility model is realized multistage draining, is reduced other draining components, not only simplify structure by the two-way oil leak hole on driving piston, and realizes the function of flexible control driving oil mass；A driving piston is used only simultaneously, simplifies the structure of driving unit；The stroke of valve rod can be finely adjusted by changing the height of upper oil leak hole；Buffer structure is used in the multistage draining exhaust valve of the utility model between each components, hard collision is effectively prevented, improves the service life of system.
Description
Technical field
The utility model relates to high-power low-speed diesel technical fields peculiar to vessel, are vented more particularly, to a kind of multistage draining
Valve.
Background technique
The exhaust valve and its control drive system of marine low speed diesel engine are one of core components of diesel engine, and driving is special
Property will directly influence the economy and emission performance of engine.Widely used exhaust valve drive system majority exists currently on the market
One action circulating exhaust valve can only realize a draining when opening, it may be assumed that pass through throttle orifice or list in the form of high pressure or low pressure
To valve to the booster cavity of execution unit full of servo oil, when exhaust valve closure, oil leak hole is normally opened；When exhaust valve needs to open,
Compressed high pressure servo oil drives exhaust valve to drive piston by servo tubing transmission to exhaust valve top in booster body
It moves downward, at this moment piston is driven to block the oil leak hole on exhaust valve casing gradually, draining terminates.Minority utilizes piston and bushing phase
Complex mechanism with sum is able to achieve multistage draining, it may be assumed that is machined with oil leak hole on bushing, utilizes bushing, piston, exhaust valve casing three
Displacement relation realize multistage draining.Since the form of low pressure is oily full of servo to the booster cavity of execution unit by check valve
When, supplement oil mass is easy excessively, if it will cause exhaust valve operation exceptions for the extra servo oil of venting not in time, or even can not be just
It often closes, to seriously affect the normal work of diesel engine.And in such a way that piston bushing matches, processing and assembly difficulty
Greatly, and the accidental situation due to processing and assembling components in existing error or each action process, above system can drainings
Amount can deviate predetermined value, so that exhaust valve can not be normally-open or be closed, seriously affect the normal operation of diesel engine.
Utility model content
The utility model patent is designed to provide a kind of multistage draining exhaust valve, to solve to mention in above-mentioned background technique
Out the problem of.
In order to solve the above technical problems, technical solutions of the utility model provide a kind of multistage draining exhaust valve, wherein packet
Include valve casing, the drive shell being detachably connected with the valve casing, the valve rod being telescopically installed in the valve casing and the valve
Bar contact and the air spring that is fixed in the drive shell and be installed in the drive shell and with the valve rod end
The driving piston of portion's contact.
Optionally, it is described driving piston in be equipped with oil pocket and with the oil pocket perforation fuel feed hole, upper oil leak hole and under
The driving piston is run through in one end of oil leak hole, the oil pocket.
Optionally, the driving piston be in step axle construction, it is described driving piston step surface and the drive shell it
Between form pressure chamber, form cushion chamber between the end face and the drive shell of the driving piston, the cushion chamber with it is described
Pressure chamber connection.
Optionally, two relative position of side wall of the drive shell offers case drain hole and servo oil inlet respectively,
The servo oil inlet and the pressure chamber connection.
Optionally, the upper oil leak hole, the lower oil leak hole are respectively during the driving piston moves back and forth and institute
State case drain hole connection.
Optionally, it is also equipped with throttling plug screw in the driving piston, is offered and the oil pocket in the throttling plug screw
The through-hole of perforation.
Optionally, valve seat is installed between the valve casing and the valve rod.
In order to solve the above technical problems, technical solutions of the utility model also provide a kind of work of multistage draining exhaust valve
Method, wherein the working method is as follows:
When exhaust valve is in the open state, high pressure servo oil enters pressure chamber by servo oil inlet and driving is driven to live
Plug, valve rod move down, while servo oil enters cushion chamber, oil pocket, upper oil leak hole and lower oil leak hole from fuel feed hole, instantly draining
When hole and case drain hole connection, servo oil is discharged by case drain hole, when upper oil leak hole and case drain hole connection
When, servo oil is discharged by case drain hole；
When exhaust valve is in close state, the restoring force and cylinder pressure activated valve bar of air spring are moved up, and valve rod drives
Piston moves up, until pressure chamber and cushion chamber not connection, the servo oil stream back pressure chamber of oil pocket and cushion chamber, by servo oil into
Mouth discharge.
The beneficial effect of technical solutions of the utility model is:
The multistage draining exhaust valve of the utility model is realized multistage draining, is subtracted by the two-way oil leak hole on driving piston
Lack other draining components, not only simplified structure, and realizes the function of flexible control driving oil mass；It uses only simultaneously
One driving piston, simplifies the structure of driving unit；The stroke of valve rod can be micro- by changing the height progress of upper oil leak hole
It adjusts；Buffer structure is used in the multistage draining exhaust valve of the utility model between each components, hard collision is effectively prevented, mentions
The high service life of system.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of multistage draining exhaust valve in the utility model embodiment；
Fig. 2 is the enlarged drawing in Fig. 1 at A；
Fig. 3~Fig. 5 is the working state schematic representation of multistage draining exhaust valve in the utility model embodiment.
Specific embodiment:
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, but not as the utility model
It limits.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it
"lower" may include that the first and second features directly contact, and also may include that the first and second features are not direct contacts but lead to
Cross the other characterisation contact between them.Moreover, fisrt feature includes above the second feature " above ", " above " and " above "
One feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First is special
Sign includes fisrt feature right above second feature and oblique upper under the second feature " below ", " below " and " below ", or only
Indicate that first feature horizontal height is less than second feature.
Referring to Figure 1 and shown in Fig. 2, show a kind of multistage draining exhaust valve of embodiment, wherein including valve casing 2, with
Drive shell 9 that valve casing 2 is detachably connected, contacts with valve rod 1 and is fixed on drive the valve rod 1 being telescopically installed in valve casing 2
The driving piston 4 for moving the air spring 12 in shell 9 and being installed in drive shell 9 and being contacted with 1 end of valve rod.Pass through control
Valve rod 1 processed is moved up and down to open and close exhaust valve.
Optionally, drive piston 4 in be equipped with oil pocket 10 and with oil pocket 10 penetrate through fuel feed hole 11, upper oil leak hole 7 and under
Oil leak hole 6, one end of oil pocket 10 is through driving piston 4, by adjusting upper oil leak hole 7 and lower oil leak hole 6 on driving piston 4
The adjustable valve rod 1 in position stroke.
Optionally, driving piston 4 is in step axle construction, drives and forms pressure between the step surface and drive shell 9 of piston 4
Power chamber 14 drives and forms cushion chamber 13, cushion chamber 13 and 14 connection of pressure chamber between the end face and drive shell 9 of piston 4.
Optionally, two relative position of side wall of drive shell 9 offers case drain hole 5 and servo oil inlet 15 respectively,
Servo oil inlet 15 and 14 connection of pressure chamber, upper oil leak hole 7, lower oil leak hole 6 respectively during driving piston 4 to move back and forth with
5 connection of case drain hole.
Optionally, drive piston 4 in be also equipped with throttling plug screw 8 (as shown in Figure 5), throttling plug screw 8 from drive piston 4
Upper surface sink to driving piston 4 in, throttle plug screw 8 in offer with oil pocket 10 penetrate through through-hole, between valve casing 2 and valve rod 1
Valve seat 3 is installed.
In order to solve the above technical problems, technical solutions of the utility model also provide a kind of work of multistage draining exhaust valve
Method, wherein working method is as follows:
Exhaust valve opening state is as shown in Fig. 2, compressed high pressure servo oil passes through servo oil inlet in booster body
15 are transferred to pressure chamber 14, and the driving piston 4 of the servo oil driving exhaust valve in pressure chamber 14 moves downward, and acting surface is driving
10 floor space of area and oil pocket of the step surface of piston 4；The servo oil in pressure chamber 14 separately flows into cushion chamber 13 and oil simultaneously
Chamber 10, excessive servo oil release (as shown in Figure 2) after flowing successively through lower discharging hole 6, case drain hole 5 by oil pocket 10.Driving
When piston 4 is moved downward to lower draining oil circuit oilhole 6 and is not connected to case drain hole 5, stop draining (as shown in Figure 3)；Driving
Piston continues a distance that moves down, and when upper oil leak hole 7 is connected to case drain hole 5, servo oil is by oil pocket 10, successively
(as shown in Figure 4) is released after flowing through draining oil circuit oilhole 7, case drain hole 5, it can soft readjustment draining by draining twice
Amount, and displacement of valve rod can be controlled by control second level oil leak hole and the positional relationship of driving piston.
Exhaust valve close closed state is as shown in figure 5, servo oil stream back pressure chamber 14 in oil pocket 10 and cushion chamber 13, then by pressing
Power chamber 14, servo oil inlet 15 flow out exhaust valve.Pass through the restoring force and cylinder residual pressure driving stem 1 of air spring 12
It moves up, valve rod 1, which acts on driving piston 4, moves upwards it, until driving piston 4 when pressure chamber 14 is not connected to cushion chamber 13
Moving up reduces the volume in cushion chamber 13, and extra servo oil flows back to pressure chamber 14 by the plug screw 8 that throttles, so as to form throttling
Buffering, and play the role of buffering and inhibit system pressure fluctuation.
In conclusion the multistage draining exhaust valve of the utility model is realized more by the two-way oil leak hole on driving piston
Grade draining, reduces other draining components, not only simplifies structure, and realizes the function of flexible control driving oil mass；Together
When use only a driving piston, simplify the structure of driving unit；The stroke of valve rod can be by changing upper oil leak hole
Height is finely adjusted；Buffer structure is used in the multistage draining exhaust valve of the utility model between each components, is effectively avoided
Hard collision, improves the service life of system.The utility model effectively reduces assembly difficulty, and greatly reduces entire dress
The processing and manufacturing cost set.
The above is only the utility model preferred embodiments, are not intended to limit the embodiments of the present invention and protection
Range should can appreciate that all with the utility model specification and diagramatic content institute to those skilled in the art
The equivalent replacement made and obviously change obtained scheme, the protection scope of the utility model should all be included in
It is interior.
Claims (7)
1. a kind of multistage draining exhaust valve, which is characterized in that including valve casing, the drive shell being detachably connected with the valve casing,
The valve rod being telescopically installed in the valve casing and the valve stem contacts and the air spring being fixed in the drive shell
And the driving piston for being installed in the drive shell and being contacted with the valve stem end.
2. multistage draining exhaust valve according to claim 1, which is characterized in that in the driving piston equipped with oil pocket and
Run through the driving piston with one end of fuel feed hole, upper oil leak hole and the lower oil leak hole of oil pocket perforation, the oil pocket.
3. multistage draining exhaust valve according to claim 2, which is characterized in that the driving piston is in step axle construction,
Pressure chamber, the end face of the driving piston and the driving are formed between the step surface and the drive shell of the driving piston
Cushion chamber, the cushion chamber and the pressure chamber connection are formed between shell.
4. multistage draining exhaust valve according to claim 3, which is characterized in that the side wall two-phase of the drive shell aligns
It sets and offers case drain hole and servo oil inlet respectively, the servo oil inlet and the pressure chamber connection.
5. multistage draining exhaust valve according to claim 4, which is characterized in that the upper oil leak hole, the lower oil leak hole
Respectively during the driving piston moves back and forth with case drain hole connection.
6. multistage draining exhaust valve according to claim 2, which is characterized in that be also equipped with throttling in the driving piston
Plug screw, it is described throttling plug screw in offer with the oil pocket perforation through-hole.
7. multistage draining exhaust valve according to claim 1, which is characterized in that installed between the valve casing and the valve rod
There is valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821722478.5U CN209244627U (en) | 2018-10-23 | 2018-10-23 | Multistage draining exhaust valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821722478.5U CN209244627U (en) | 2018-10-23 | 2018-10-23 | Multistage draining exhaust valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209244627U true CN209244627U (en) | 2019-08-13 |
Family
ID=67525647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821722478.5U Active CN209244627U (en) | 2018-10-23 | 2018-10-23 | Multistage draining exhaust valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209244627U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110593983A (en) * | 2019-10-29 | 2019-12-20 | 中船动力研究院有限公司 | Integrated low-pressure oil supplementing exhaust valve driving device |
-
2018
- 2018-10-23 CN CN201821722478.5U patent/CN209244627U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110593983A (en) * | 2019-10-29 | 2019-12-20 | 中船动力研究院有限公司 | Integrated low-pressure oil supplementing exhaust valve driving device |
| CN110593983B (en) * | 2019-10-29 | 2024-05-14 | 中船动力研究院有限公司 | Integrated low-pressure oil supplementing exhaust valve driving device |
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