CN208267920U - A kind of cam overhead exhaust gas auxiliary selenoid fluid pressure type valve actuating mechanism applied to marine low-speed machine - Google Patents
A kind of cam overhead exhaust gas auxiliary selenoid fluid pressure type valve actuating mechanism applied to marine low-speed machine Download PDFInfo
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- CN208267920U CN208267920U CN201820915264.3U CN201820915264U CN208267920U CN 208267920 U CN208267920 U CN 208267920U CN 201820915264 U CN201820915264 U CN 201820915264U CN 208267920 U CN208267920 U CN 208267920U
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- exhaust gas
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- plunger
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Abstract
The purpose of this utility model is to provide a kind of cam overhead exhaust gas auxiliary selenoid fluid pressure type valve actuating mechanisms applied to marine low-speed machine, including cam, hydraulic system piston, plunger, air valve stem, armature, idler wheel is set below cam, idler wheel is mounted on top, top lower section connects mandril, mandril connects hydraulic system piston, plunger is connected below hydraulic system piston, hydraulic system piston and plunger form hydraulic oil space, air valve stem upper end connects plunger, air valve valve disc is arranged in air valve stem lower end, armature is fixed on air valve stem, spring for valve is cased on air valve stem, electromagnetic coil is set outside the air valve stem above armature.The utility model reduces Valve Gear of Diesel operating noise, reduces valve actuating mechanism size, accelerates air valve seating velocity, improves exhaust gas utilization rate, can be according to diesel engine difference Operating condition adjustment valve timing.
Description
Technical field
The utility model relates to a kind of diesel engines, specifically marine low-speed machine valve actuating mechanism.
Background technique
The task of valve actuating mechanism is to guarantee that diesel engine opens or closes each cylinder by the defined time during the work time
Intake valve or exhaust valve make fresh air as much as possible enter cylinder, and the exhaust gas for making expansion end is emptied from cylinder, guarantee
Working process of diesel engine is continuously and perfect.
According to the difference of valve actuation mechanism, the air distribution system driving mechanism of internal combustion engine have mechanical valve actuation mechanism and
Two kinds of forms of fluid pressure type valve actuation mechanism.For mechanical valve actuation mechanism, in diesel engine cold conditions, idler wheel falls in cam
On basic circle, there is valve clearance between rocker arm and air valve, operating noise is excessive, and air valve is easy to damage, hydraulic valve driving mechanism by
In the damping action for having hydraulic oil, the shock of air valve and valve seat is reduced, reduces operating noise, and improves the use of air valve
Service life.
Existing fluid pressure type valve actuation mechanism relies on air spring in air valve shutoff stroke, and air spring is in opening travel
Energy is consumed, air spring is slow in air valve shutoff stroke speed and can not adjust, and air valve close moment can not change, and make gas
The applying working condition range and response speed of valve reduce, and influence the ventilation characteristic of diesel engine.
Summary of the invention
The purpose of this utility model is to provide carried out by hydraulic system, electromagnetic system and exhaust gas auxiliary system to air valve
Air valve response speed is accelerated in control, reduces air valve operating noise and is suitable for one kind of various working applied to marine low-speed
The cam overhead exhaust gas auxiliary selenoid fluid pressure type valve actuating mechanism of machine.
Purpose of the utility model is realized as follows:
A kind of cam overhead exhaust gas auxiliary selenoid fluid pressure type valve actuating mechanism applied to marine low-speed machine of the utility model,
It is characterized in: including cam, hydraulic system piston, plunger, air valve stem, armature, idler wheel is set below cam, idler wheel is mounted on top
On, top lower section connects mandril, and mandril connects hydraulic system piston, plunger is connected below hydraulic system piston, and hydraulic system is living
Plug forms hydraulic oil space with plunger, and air valve stem upper end connects plunger, and air valve valve disc is arranged in air valve stem lower end, and armature is fixed
On air valve stem, it is cased with spring for valve on air valve stem, electromagnetic coil is set outside the air valve stem above armature.
The utility model can also include:
It 1, further include exhaust gas auxiliary system, the exhaust gas auxiliary system includes exhaust gas cylinder, exhaust gas cylinder and air valve stem phase
Fixed, exhaust gas cylinder both ends are respectively set exhaust gas and flow into valve and exhaust gas outflow valve, and exhaust gas flows into valve and connects diesel exhaust gas general pipeline.
2, exhaust gas flows into valve diameter greater than exhaust exit valve diameter.
3, in diesel engine cold conditions, cam base circle is contacted with idler wheel, and hydraulic system piston, plunger are located at initial position, electricity
Magnetic coil is in off-position, and exhaust gas auxiliary system enters without exhaust gas, and exhaust gas cylinder is in initial position, and air valve valve disc is in air valve
Spring effect is lower to be in half-open half closed state；When diesel engine work, electromagnetic coil is powered, and electromagnetic coil attracts armature, air valve
It is in close state, when diesel valve needs to open, cam rotation, the hydraulic oil of mandril downlink, hydraulic oil space is pressed
Contracting, plunger downlink opens air valve valve disc, and when air valve needs to close, electromagnetic coil is powered, and attracts armature, while in exhaust main
Exhaust gas enter exhaust gas flow into valve, exhaust gas flow out valve be normally open, push exhaust gas cylinder uplink, air valve valve disc close, close
Electromagnetic coil is in energized state afterwards, and exhaust gas flows out cylinder by exhaust gas outflow valve, and air valve valve disc is in close state.
The advantage of the utility model is: the utility model reduces Valve Gear of Diesel operating noise, reduces distribution
Mechanism size accelerates air valve seating velocity, improves exhaust gas utilization rate, can be according to diesel engine difference Operating condition adjustment valve timing.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
It illustrates with reference to the accompanying drawing and the utility model is described in more detail:
In conjunction with Fig. 1, the utility model mainly includes with lower component: cam 1, top 2, hydraulic system piston 3, hydraulic pressure system
System bottom surface 4, plunger 5, spring for valve 6, exhaust gas flow into valve 7, idler wheel 8, mandril 9, cylinder cover 10, hydraulic oil space 11, electromagnetism
Coil 12, armature 13, exhaust gas flow out valve 14, exhaust gas cylinder 15, air valve valve disc 16.In diesel engine cold conditions, 1 basic circle of cam with
Idler wheel 8 contacts, and hydraulic system piston 3 is located at initial position, and the plunger 5 contacted with hydraulic system bottom surface 4 is located at initial position,
Electromagnetic coil 12 is in off-position at this time, and electromagnetic coil 12 does not have electromagnetic force, does not attract armature 13, waste gas system without exhaust gas into
Enter, exhaust gas cylinder 15 is in initial position, and air valve valve disc 16 is in half-open half closed state under the effect of spring for valve 6, works as diesel oil
When machine works, electromagnetic coil 12 is powered first, and electromagnetic coil 12 attracts armature 13, and air valve is in close state, when diesel engine gas
When valve needs to open, cam 1 is rotated, and 9 downlink of mandril, hydraulic oil is compressed, and 5 downlink of plunger opens air valve valve disc 16, works as air valve
When needing to close, to electromagnetic coil energization 12, attract armature 13, while the exhaust gas in exhaust main enters exhaust gas and flows into valve 7, and
It is normally open that exhaust gas, which flows out valve 14, pushes 15 uplink of exhaust gas cylinder by pressure difference, and the two acts on simultaneously, and air valve valve disc 16 is fast
Speed is closed, and electromagnetic coil 12 be in energized state after closing, and exhaust gas is by the exhaust gas outflow outflow cylinder of valve 14, at air valve valve disc 16
In closed state.
When diesel engine does not work, by spring for valve elastic force, air valve is in half-open half closed state, when diesel engine works
When, HYDRAULIC CONTROL SYSTEM air valve opening travel, electromagnetic system controls air valve shutoff stroke, and exhaust gas auxiliary system auxiliary air vale is closed
Stroke, and then realize the opening and closing of air valve.
HYDRAULIC CONTROL SYSTEM air valve opening travel is；Camshaft makes hydraulic system piston downlink by idler wheel and mandril, builds
The oil pressure in hydraulic system is erected, plunger upper surface is acted on, pushes air valve downlink.
Electromagnetic system controls air valve shutoff stroke；Electromagnetic coil, which is powered, generates electromagnetic force, attracts armature uplink, armature band
It takes offence valve uplink, air valve is pushed to close, while coil can be changed as needed and be powered the moment, and then change valve timing.
Exhaust gas auxiliary system auxiliary air vale shutoff stroke is；The exhaust gas of exhaust main needs close moment by giving up in air valve
Gas flows into valve and enters exhaust gas cylinder, is greater than exhaust exit valve diameter since exhaust gas flows into valve diameter, leads to the gaseous mass entered
Greater than the gaseous mass of discharge, exhaust gas cylinder uplink is pushed by pressure difference, auxiliary air vale is closed, electromagnetic coil power consumption is reduced,
Accelerate air valve closing velocity simultaneously, additionally, due to there are spring for valve drag effects, can avoid the shock of air valve and valve seat.
Claims (4)
1. a kind of cam overhead exhaust gas auxiliary selenoid fluid pressure type valve actuating mechanism applied to marine low-speed machine, it is characterized in that: including
Idler wheel is arranged in cam, hydraulic system piston, plunger, air valve stem, armature, cam lower section, and idler wheel is mounted on top, top lower section
Mandril is connected, mandril connects hydraulic system piston, connects plunger below hydraulic system piston, hydraulic system piston is formed with plunger
Hydraulic oil space, air valve stem upper end connect plunger, and air valve valve disc is arranged in air valve stem lower end, and armature is fixed on air valve stem,
It is cased with spring for valve on air valve stem, electromagnetic coil is set outside the air valve stem above armature.
2. a kind of cam overhead exhaust gas auxiliary selenoid fluid pressure type distribution applied to marine low-speed machine according to claim 1
Mechanism, it is characterized in that: further including exhaust gas auxiliary system, the exhaust gas auxiliary system includes exhaust gas cylinder, exhaust gas cylinder and air valve
Bar is mutually fixed, and exhaust gas cylinder both ends are respectively set exhaust gas and flow into valve and exhaust gas outflow valve, and exhaust gas flows into valve and connects diesel exhaust gas
General pipeline.
3. a kind of cam overhead exhaust gas auxiliary selenoid fluid pressure type distribution applied to marine low-speed machine according to claim 2
Mechanism, it is characterized in that: exhaust gas, which flows into valve diameter, is greater than exhaust exit valve diameter.
4. a kind of cam overhead exhaust gas auxiliary selenoid applied to marine low-speed machine according to claim 1 to 3 is hydraulic
Formula valve actuating mechanism, it is characterized in that: cam base circle is contacted with idler wheel in diesel engine cold conditions, hydraulic system piston, plunger are located at just
Beginning position, electromagnetic coil are in off-position, and exhaust gas auxiliary system enters without exhaust gas, and exhaust gas cylinder is in initial position, air valve
Valve disc is in half-open half closed state under spring for valve effect；When diesel engine work, electromagnetic coil is powered, and electromagnetic coil attracts
Armature, air valve are in close state, when diesel valve needs to open, cam rotation, and mandril downlink, the liquid in hydraulic oil space
Pressure oil is compressed, and plunger downlink opens air valve valve disc, and when air valve needs to close, electromagnetic coil is powered, and is attracted armature, is arranged simultaneously
Exhaust gas in gas general pipeline enters exhaust gas and flows into valve, and it is normally open that exhaust gas, which flows out valve, pushes exhaust gas cylinder uplink, and air valve valve disc closes
It closes, electromagnetic coil is in energized state after closing, and exhaust gas flows out cylinder by exhaust gas outflow valve, and air valve valve disc is in close state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820915264.3U CN208267920U (en) | 2018-06-13 | 2018-06-13 | A kind of cam overhead exhaust gas auxiliary selenoid fluid pressure type valve actuating mechanism applied to marine low-speed machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820915264.3U CN208267920U (en) | 2018-06-13 | 2018-06-13 | A kind of cam overhead exhaust gas auxiliary selenoid fluid pressure type valve actuating mechanism applied to marine low-speed machine |
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| Publication Number | Publication Date |
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| CN208267920U true CN208267920U (en) | 2018-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820915264.3U Active CN208267920U (en) | 2018-06-13 | 2018-06-13 | A kind of cam overhead exhaust gas auxiliary selenoid fluid pressure type valve actuating mechanism applied to marine low-speed machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590796A (en) * | 2018-06-13 | 2018-09-28 | 哈尔滨工程大学 | A kind of cam overhead exhaust gas auxiliary selenoid fluid pressure type valve actuating mechanism applied to marine low-speed machine |
-
2018
- 2018-06-13 CN CN201820915264.3U patent/CN208267920U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108590796A (en) * | 2018-06-13 | 2018-09-28 | 哈尔滨工程大学 | A kind of cam overhead exhaust gas auxiliary selenoid fluid pressure type valve actuating mechanism applied to marine low-speed machine |
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