CN217632617U

CN217632617U - Waste gas valve

Info

Publication number: CN217632617U
Application number: CN202222102692.3U
Authority: CN
Inventors: 张林锋
Original assignee: Jiangsu Xinhuanzhong Automobile Technology Co ltd
Current assignee: Jiangsu Xinhuanzhong Automobile Technology Co ltd
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2022-10-21
Anticipated expiration: 2032-08-10

Abstract

The utility model discloses a waste gas valve, which adopts the technical scheme that the waste gas valve comprises a shell, wherein the shell is provided with an air inlet, an oil-gas separation cavity, a pressure control cavity, a manifold interface channel and a turbine end interface channel which are connected with an engine, the oil-gas separation cavity is communicated with the air inlet and the pressure control cavity, the bottom of the oil-gas separation cavity is provided with an oil return port connected with the engine, the oil-gas separation cavity is arranged in a conical shape, an air inlet pipeline is arranged between the oil-gas separation cavity and the air inlet, and the air inlet direction of the air inlet pipeline is tangent to the inner wall of the oil-gas separation cavity; a pressurizing cavity is arranged between the air inlet pipeline and the air inlet, and a pressurizing valve for pressurizing air entering from the air inlet is arranged in the pressurizing cavity; the oil-gas separation mode of the labyrinth is changed into a centrifugal mode through the oil-gas separation cavity, the path of oil-gas to travel in the waste gas valve is shortened, the structure of the waste gas valve is simpler, the circumferential rotation speed of the oil-gas is faster through the booster valve and the air inlet pipeline, the centrifugal force is increased, and the oil-gas separation effect is better.

Description

Waste gas valve

Technical Field

The utility model relates to an engine accessories technical field, concretely relates to waste gas valve.

Background

The waste gas valve is also called as an oil-gas separator and a pressure control valve. When the engine works, a small part of high-pressure combustible mixed gas and burnt gas in the combustion chamber leaks into a crankcase through a gap between the piston group and the cylinder, commonly called waste gas, and the components of the high-pressure combustible mixed gas and the burnt gas comprise unburned fuel gas, water vapor, the waste gas and the like, and the waste gas can dilute engine oil, reduce the service performance of the engine oil, accelerate the oxidation and deterioration of the engine oil, form oil sludge and block an oil way; acid gases in the exhaust gas are mixed into the lubrication system, which can cause corrosion and accelerated wear of engine parts, and the exhaust gas can cause the pressure of the crankcase to be too high to damage the sealing of the crankcase, so that the engine oil leaks and runs off.

In order to prevent the crankcase from being over-pressurized, prolong the service life of the engine oil, reduce the abrasion and corrosion of parts and prevent the oil leakage of the engine, in addition, in order to meet the increasingly strict emission requirements and improve the economy, an exhaust gas valve is arranged in the design process of the automobile engine, the exhaust gas valve has the function of introducing the exhaust gas into the engine for secondary combustion through the pressure difference between an air inlet pipe and the crankcase, and the exhaust gas can also bring the engine oil particles (oil mist) in the engine into the air inlet pipe when flowing to the air inlet pipe, so a forced ventilation system of the engine must be provided with a very important component, namely an oil-gas separator, the oil-gas separator in a ventilation device of the crankcase of the engine can solve the problems, the separated engine oil flows back to the crankcase, the filtered exhaust gas without the engine oil enters the engine for secondary combustion, and the carbon deposition caused by the engine oil entering the air inlet system and the combustion chamber and the unnecessary consumption of the engine oil are prevented. The publication number (CN 204851377U) discloses an oil-gas separation device, which realizes the blocking of oil through oil baffles and a plurality of baffles in a second oil-gas separation cavity and a third oil-gas separation cavity, so as to separate oil in waste gas;

in above-mentioned structure, baffle and fluid baffle's setting adopts a plurality of labyrinth structures to carry out oil-gas separation essentially, and is better to the oil mist separation effect of big granule, nevertheless is relatively poor to the tiny particle oil mist separation effect in the waste gas.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a waste gas valve can strengthen the separation effect of oil gas through centrifugal structure, has reduced the route that oil gas passed through simultaneously, has improved oil-gas separation's efficiency.

In order to achieve the above purpose, the utility model adopts the technical scheme that: an exhaust gas valve comprises a shell, wherein an air inlet, an oil-gas separation cavity, a pressure control cavity, a manifold interface channel and a turbine end interface channel which are connected with an engine are arranged on the shell, and the exhaust gas valve is characterized in that the oil-gas separation cavity is communicated with the air inlet and the pressure control cavity, an oil return port connected with the engine is arranged at the bottom of the oil-gas separation cavity, the oil-gas separation cavity is arranged in a conical shape, an air inlet pipeline is arranged between the oil-gas separation cavity and the air inlet, and the air inlet direction of the air inlet pipeline is tangential to the inner wall of the oil-gas separation cavity; still be provided with the pressure boost chamber between admission line and the air inlet, be provided with the pressure boost valve that is used for carrying out the pressure boost to the gas that the air inlet got into in the pressure boost intracavity, the pressure boost valve is used for making the velocity of flow that oil gas passed admission line become fast.

The utility model discloses still further set up to, the laminating is provided with the metal mesh on the oil-gas separation intracavity wall, be provided with a plurality of wires that set up to the oil return opening slope on the metal mesh.

The utility model discloses still further set up to, be provided with the communicating pipe that is used for the gas circulation between oil-gas separation chamber and the pressure control chamber, the gas pocket that is provided with a plurality of slants and sets up on the one end outer wall that is located the oil-gas separation intracavity communicating pipe.

The utility model discloses still further set up to, the pressure-increasing valve is including setting up in the valve pocket of pressure-increasing chamber, be provided with the through-hole between valve pocket and the pressure-increasing chamber, be provided with the diaphragm that is located the valve intracavity in the through-hole, be provided with the extrusion spring between diaphragm and the valve pocket.

The utility model discloses still further set up to, be provided with the pressure control valve in the pressure control intracavity, the pressure control valve is used for controlling the gaseous manifold interface passageway or the turbine end interface passageway outflow of following after filtering.

The utility model discloses still further set up to, the pressure control valve includes that elasticity sets up the valve film in the pressure control intracavity, the valve touches and divide into epicoele and cavity of resorption with the pressure control chamber, the epicoele links to each other with the external world, be provided with the spring that offsets with the valve film in the cavity of resorption, the cavity of resorption is linked together with manifold interface passageway and turbine end interface passageway, the department of linking to each other is provided with first check valve, be provided with the second check valve in the manifold interface passageway.

The utility model discloses still further set up to, communicating pipe is provided with the bell towards the one end of oil-gas separation chamber, be provided with the guide board that corresponds with the gas pocket on communicating pipe.

To sum up, the utility model has the advantages that:

1. compared with the prior art, the utility model changes the original labyrinth type separation mode into a centrifugal type separation mode, thereby shortening the traveling distance of the waste gas in the waste gas valve and simplifying the structure; thereby the direction of giving vent to anger through with admission line is tangent with oil-gas separation intracavity wall and is realized letting waste gas be circumferential rotary motion along oil-gas separation intracavity's inner wall, then makes fluid in the waste gas can be got rid of to the inner wall in oil-gas separation chamber under the effect of centrifugal force on, the realization is to the separation of oil gas.

2. The pressure intensity of gas entering the gas inlet pipeline can be enhanced through the booster valve, so that the flowing speed of the gas is accelerated, the gas flow speed in the oil-gas separation cavity is faster, and the oil-gas separation effect is better.

Drawings

Fig. 1 is a rear view of the present embodiment.

Fig. 2 is a schematic front structure diagram of the present embodiment.

Fig. 3 is a perspective partial sectional view of the present embodiment.

Fig. 4 is an enlarged view of the oil-gas separation chamber of fig. 3.

Reference numerals are as follows: 1-a shell; 2-an air inlet; 3-an oil-gas separation chamber; 301-oil return port; 302-an air intake duct; 303-a pressurizing cavity; 304-a pressure increasing valve; 313-valve cavity; 323-membrane; 333-extrusion spring; 4-a pressure control chamber; 401-valve membrane; 402-a spring; 5-manifold interface channel; 6-turbine end interface passage; 7-a metal mesh; 8-a metal wire; 9-communicating pipe; 10-air holes; 11-a guide plate; 12-cone orifice.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-4, the present embodiment discloses an exhaust gas valve, which includes a housing 1, where the housing 1 is provided with an air inlet 2 connected to an engine, an oil-gas separation chamber 3, a pressure control chamber 4, a manifold interface passage 5, and a turbine end interface passage 6, and is characterized in that the oil-gas separation chamber 3 is communicated with the air inlet 2 and the pressure control chamber 4, and the bottom of the oil-gas separation chamber 3 is provided with an oil return port 301 connected to the engine, the oil-gas separation chamber 3 is arranged in a conical shape, an air inlet pipeline 302 is arranged between the oil-gas separation chamber 3 and the air inlet 2, and an air inlet direction of the air inlet pipeline 302 is tangential to an inner wall of the oil-gas separation chamber 3; a pressurizing cavity 303 is further arranged between the air inlet pipeline 302 and the air inlet 2, a pressurizing valve 304 for pressurizing air entering from the air inlet 2 is arranged in the pressurizing cavity 303, and the pressurizing valve 304 is used for enabling the flow rate of oil gas passing through the air inlet pipeline 302 to be fast.

A metal mesh 7 is attached to the inner wall of the oil-gas separation cavity 3, and a plurality of metal wires 8 which are obliquely arranged towards the oil return opening 301 are arranged on the metal mesh 7;

a communicating pipe 9 for gas circulation is arranged between the oil-gas separation chamber 3 and the pressure control chamber 4, and a plurality of obliquely arranged air holes 10 are arranged on the outer wall of one end of the communicating pipe 9, which is positioned in the oil-gas separation chamber 3; the pressure control valve includes that elasticity sets up the valve membrane 401 in the pressure control chamber 4, valve membrane 401 divides pressure control chamber 4 into epicoele and cavity of resorption, the epicoele links to each other with the external world, be provided with the spring 402 that offsets with valve membrane 401 in the cavity of resorption, the cavity of resorption is linked together with manifold interface passageway 5 and turbine end interface passageway 6, the department of linking to each other is provided with first check valve, be provided with the second check valve in the manifold interface passageway 5.

In the use process, the air inlet 2 is connected with a valve chamber of an engine, waste gas in the engine can enter the interior of the waste gas valve from the air inlet 2, so that the waste gas can enter an oil-gas separation cavity 3 shown in fig. 3, oil-gas separation of the waste gas is realized, wherein oil is sent back to the engine through an oil return port, and the engine is prevented from burning the oil when the oil enters a combustion chamber; then, the separated waste gas in the oil-gas separation cavity enters a pressure control cavity 4 through a communicating pipe 9, an upper cavity of the pressure control cavity 4 is communicated with the outside air, so that the pressure of the waste gas in the pressure control cavity can be controlled through a valve membrane 401, the stability of gas output is ensured, then the gas can enter a manifold interface channel 5 or a turbine end interface channel 6 which is communicated with a lower cavity, the manifold interface channel 5 is communicated with a combustion chamber in an engine through an air inlet manifold, when the engine idles, the air inlet manifold is in a negative pressure state, at the moment, a second check valve is opened, a first check valve is closed, so that the gas in the pressure control cavity 4 can be sucked into the combustion chamber to perform secondary combustion, and the waste gas purification is realized; when the turbocharger is started, positive pressure is formed between the intake manifold and the manifold interface channel 5 at the moment, so that the second one-way valve is in a closed state, waste gas in the combustion chamber is prevented from entering the waste gas valve, and an isolation effect is achieved; at this time, the first check valve is in an open state, so that exhaust gas is discharged to the outside through the turbocharger, and the pipeline from the pressure control cavity 4 to the manifold interface channel 5 or the turbine end interface channel 6, the structural principle and the working principle of the pressure control valve are the same as those of the exhaust gas valve used by the type EA888 engine on the market.

Compared with the prior art, the oil-gas separation cavity is improved, the gas outlet direction of the gas inlet pipeline is tangent to the inner wall of the oil-gas separation cavity, so that the waste gas can do circumferential spiral motion along the inner wall after entering the oil-gas separation cavity, the oil in the waste gas is attached to the inner wall of the cavity due to the contact of the centrifugal force with the inner wall of the cavity in the rotating process, and then flows along the conical direction towards the oil return opening 301 and is sent to the engine again; centrifugal oil-gas separation mode can improve oil-gas separation's effect, can make under the effect of centrifugal force in the waste gas large granule oil mist and tiny particle oil mist can both be got rid of to the inner wall on, bin and compare with current labyrinth separation mode, the effectual stroke that has reduced waste gas and passed through in the waste gas valve for the structure is simpler.

As shown in fig. 3-4, the inner wall of the oil-gas separation chamber 3 is provided with a metal mesh, and the arrangement of the metal mesh can better separate oil from waste gas in oil gas, thereby improving the oil-gas separation effect; simultaneously be provided with a plurality of decurrent wires 8 of slope on the metal mesh 7, the wire 8 can assemble into relatively great oil drop to the tiny oil drop on metal mesh and the interior, then on drippage to the oil return opening, thereby can reduce too much fluid and stay and appear solidifying and cause the jam on inner wall and metal mesh like this.

In this embodiment, the booster valve 304 includes a valve cavity 313 arranged in the booster cavity 303, a through hole is arranged between the valve cavity 313 and the booster cavity 303, a diaphragm 323 arranged in the valve cavity 313 is arranged in the through hole, an extrusion spring 333 is arranged between the diaphragm 323 and the valve cavity 313, the booster valve is arranged between the air inlet 2 and the air inlet pipeline 302, and under the action of the diaphragm 323 and the extrusion spring, the space volume of the booster cavity 303 can be reduced, so that the gas flow rate of the waste gas passing through can be increased, the flow rate of the waste gas passing through the air inlet pipeline in the oil-gas separation cavity can be increased, the centrifugal force is increased, and the oil-gas separation effect is better; simultaneously, when the gas pressure that gets into inside in the air inlet was too big, can play the effect of buffering to pressure through the pressure-increasing valve to avoid gaseous too big pressure to make the too big inner wall that causes of oil-gas separation intracavity pressure to damage.

In this embodiment, a pressure control valve is disposed in the pressure control chamber 4, and the pressure control valve is used for controlling the flow of filtered gas from the manifold interface passage 5 or the turbine interface passage 6.

A conical opening 12 is formed in one end, facing the oil-gas separation chamber 3, of the communicating pipe 9, and a guide plate 11 corresponding to the air hole 10 is arranged on the communicating pipe 9;

as shown in fig. 4, the inner wall of the oil-gas separation chamber is conical, the inner diameter of the inner part of the oil-gas separation chamber gradually decreases from top to bottom, and oil gas continuously enters the air inlet, so that the oil gas moves downwards under the action of air pressure in addition to circumferential movement; in the process that the oil gas moves in the circumferential direction in the centrifugal channel and moves downwards, the circumferential movement speed of the oil gas is gradually reduced, so that the gas at the lower part can enter the communicating pipe through the gas holes; communicating pipe 9 is last gas pocket 10 and is the setting up in the slant, and the both sides of gas pocket are provided with the guide board simultaneously, and the collision through oil gas and guide board can improve oil-gas separation's effect to the further filtration of oil gas after the separation, and the guide board is the setting of falling V-arrangement to make attached to the fluid in the top can be by the guide drippage to the oil return opening in.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, any modification, equivalent replacement, or improvement made within the design concept of the present invention should be included within the protection scope of the present invention.

Claims

1. An exhaust gas valve comprises a shell (1), wherein an air inlet (2) connected with an engine, an oil-gas separation cavity (3), a pressure control cavity (4), a manifold interface channel (5) and a turbine end interface channel (6) are arranged on the shell (1), and the exhaust gas valve is characterized in that the oil-gas separation cavity (3) is communicated with the air inlet (2) and the pressure control cavity (4), an oil return port (301) connected with the engine is formed in the bottom of the oil-gas separation cavity, the oil-gas separation cavity (3) is arranged in a conical shape, an air inlet pipeline (302) is arranged between the oil-gas separation cavity and the air inlet (2), and the air inlet direction of the air inlet pipeline (302) is tangential to the inner wall of the oil-gas separation cavity (3); still be provided with booster chamber (303) between admission line (302) and air inlet (2), be provided with in booster chamber (303) and be used for carrying out the booster valve (304) that the pressure boost is carried out to the gas that air inlet (2) got into, booster valve (304) are used for making the velocity of flow that oil gas passed admission line (302) become fast.

2. An exhaust gas valve according to claim 1, characterized in that a metal mesh (7) is attached to the inner wall of the oil-gas separation chamber (3), and a plurality of metal wires (8) inclined towards the oil return opening (301) are arranged on the metal mesh (7).

3. An exhaust gas valve according to claim 1 or 2, characterized in that a communicating pipe (9) for gas circulation is arranged between the oil-gas separation chamber (3) and the pressure control chamber (4), and a plurality of obliquely arranged gas holes (10) are arranged on the outer wall of one end of the communicating pipe (9) located in the oil-gas separation chamber (3).

4. An exhaust gas valve according to claim 1, characterized in that the pressure charging valve (304) comprises a valve chamber (313) arranged in the pressure charging chamber (303), that a through hole is arranged between the valve chamber (313) and the pressure charging chamber (303), that a diaphragm (323) is arranged in the valve chamber (313) in the through hole, and that a pressing spring (333) is arranged between the diaphragm (323) and the valve chamber (313).

5. An exhaust valve according to claim 1, characterized in that a pressure control valve is arranged in the pressure control chamber (4) for controlling the flow of filtered gas out of the manifold port passage (5) or the turbine-end port passage (6).

6. An exhaust gas valve according to claim 5, characterized in that the pressure control valve comprises a valve membrane (401) elastically disposed in the pressure control chamber (4), the valve membrane (401) divides the pressure control chamber (4) into an upper chamber and a lower chamber, the upper chamber is connected to the outside, a spring (402) abutting against the valve membrane (401) is disposed in the lower chamber, the lower chamber is communicated with the manifold interface passage (5) and the turbine end interface passage (6), a first check valve is disposed at the connection, and a second check valve is disposed in the manifold interface passage (5).

7. An exhaust gas valve according to claim 3, characterized in that the end of the communicating pipe (9) facing the oil-gas separation chamber (3) is provided with a tapered mouth (12), and the communicating pipe (9) is provided with a guide plate (11) corresponding to the air hole (10).