CN210858983U

CN210858983U - Valve seat structure of EGR valve

Info

Publication number: CN210858983U
Application number: CN201921669701.9U
Authority: CN
Inventors: 陈华; 肖泫岑; 冯志文
Original assignee: Wuxi Tongyi Automobile Power Technology Co ltd
Current assignee: Wuxi Tongyi Automobile Power Technology Co ltd
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2020-06-26
Anticipated expiration: 2029-10-08

Abstract

The utility model provides a EGR valve disk seat structure, it includes: the valve seat is provided with a first valve seat end and a second valve seat end extending from the first valve seat end, wherein the second valve seat end is a pipeline penetrating along the axial direction, the outer wall of the second valve seat end is provided with a predetermined number of valve seat air outlet cavities, the valve seat air outlet cavities penetrate through the second valve seat end, the two ends of the valve seat air outlet cavities and the two ends of the second valve seat end are in fluid communication, and the valve seat air outlet cavities are in fluid communication with each other.

Description

Valve seat structure of EGR valve

Technical Field

The utility model relates to an engine exhaust gas recirculation system controlling means especially relates to an EGR valve disk seat structure.

Background

EGR is called Exhaust Gas Recirculation (EGR) system, which guides part of Exhaust Gas in engine Exhaust back to the air inlet pipe through a pipeline, joins with Gas in the air inlet pipe, and then enters a cylinder for Recirculation, thus effectively reducing the discharge amount of nitrogen oxide (NOx) in the Exhaust Gas. With the stricter and stricter automobile exhaust emission regulations, the function of the EGR valve on the engine is more and more obvious. The EGR valve is used as a key execution element in an engine exhaust gas recirculation system for adjusting the flow of recirculated exhaust gas, and particularly has the function of introducing a small amount of exhaust gas into a cylinder and reducing the temperature in the cylinder to reduce the emission of harmful gases. The EGR valve provided in the current market has the advantages of heavier mass, larger volume and more complex structure, and can not adapt to different positions of the air outlet of the engine to timely convert the position of the air outlet of the EGR valve.

Disclosure of Invention

In view of this, the utility model aims at providing a quality is lighter, and the volume is less, simple structure, changeable electronic EGR valve seat structure of gas outlet direction.

To achieve the above object, the utility model provides a valve seat structure of EGR valve, it includes: the valve seat is provided with a first valve seat end and a second valve seat end extending from the first valve seat end, wherein the second valve seat end is a pipeline penetrating along the axial direction, the outer wall of the second valve seat end is provided with a predetermined number of valve seat air outlet cavities, the valve seat air outlet cavities penetrate through the second valve seat end, the two ends of the valve seat air outlet cavities and the two ends of the second valve seat end are in fluid communication, and the valve seat air outlet cavities are in fluid communication with each other.

Further, the structural shape of the cavity at the air outlet of the valve seat is designed to be streamline to facilitate air flow.

Further, a plurality of weight reduction grooves are formed in the valve seat, so that the weight of the whole electric EGR valve is reduced.

Furthermore, a plurality of labyrinth grooves are formed between the dustproof cover of the EGR valve and the valve seat.

Further, the labyrinth groove is disposed on the valve seat first end of the valve seat.

Further, the valve seat first end has a valve seat first end exterior and a valve seat first end interior, wherein the labyrinth groove is disposed on the valve seat first end interior.

Further, the valve seat is integrally cast.

The utility model provides a pair of EGR valve seat structure has following advantage for prior art:

the EGR valve seat has a simple structure, and a cavity at an air outlet of the valve seat is designed in a streamline shape, so that the circulation of waste gas is smoother;

the valve seat of the EGR valve has two parts of structures, namely a first end of the valve seat and a second end of the valve seat, so that the requirement of different engines on the position of an air outlet of the EGR valve is met;

3, a plurality of weight reduction grooves are formed in the valve seat of the EGR valve, so that the valve seat is lighter in weight;

4 set up on the EGR valve disk seat labyrinth recess for the EGR valve also can normally work under adverse circumstances, has avoided polluting impurity to get into inside the EGR valve, has prolonged life.

Drawings

Fig. 1 shows a mounting diagram of an EGR valve.

Fig. 2 shows that the utility model provides a structural schematic diagram of an EGR valve seat structure.

Fig. 3 shows a schematic structural diagram of a valve seat structure of an EGR valve provided by the present invention.

Fig. 4 shows a cross-sectional view of a valve seat structure of an EGR valve provided by the present invention.

Fig. 5 shows a schematic structural diagram of a valve seat structure of an EGR valve provided by the present invention.

Detailed Description

The technical solution in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

It is to be understood that the described embodiments are merely some embodiments and not all embodiments of the present application, and that the following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application and its applications.

In the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly and include, for example, fixed connections, detachable connections, or all manner of connections; "coupled" may be direct or indirect through an intermediary. The terms "upper", "lower", and the like indicate orientations or positional relationships based on the manner or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or units must have a specific orientation, be constructed and operated in a specific orientation. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 1, a diagram of an electric EGR valve is shown. As can be seen from the figure, the EGR valve comprises a power speed reducer 1, a valve seat 2 and a dust cover 3, wherein one end of the dust cover 3 is fastened on the body of the EGR valve, and the other end is fixedly connected with the valve seat 2 through a screw 20.

As shown in fig. 2, the present invention provides a structural schematic diagram of a valve seat structure of an EGR valve. As can be seen from the figure, the valve seat 2 has a valve seat first end 21 and a valve seat second end 22 extending from the valve seat first end 21, wherein the valve seat second end 22 is a pipe penetrating along the axial direction, a predetermined number of valve seat air outlet cavities 4 are formed in the outer wall of the valve seat second end 22, the valve seat air outlet cavities 4 penetrate through the valve seat second end 22, two ends of the valve seat air outlet cavities 4 and the valve seat second end 22 are in fluid communication, and the valve seat air outlet cavities 4 are in fluid communication with each other.

It is noted that the valve seat outlet cavity 4 is contoured to facilitate air flow.

As shown in fig. 3, the present invention provides a structural schematic diagram of a valve seat structure of an EGR valve. As can be seen from the figure, a plurality of weight reduction grooves 5 are arranged on the valve seat 2 to reduce the mass of the whole electric EGR valve, so that the weight-reduced EGR valve becomes light, the volume is reduced, and the structure is simple.

As shown in fig. 4, it shows a structural schematic diagram of a valve seat structure of an EGR valve provided by the present invention. As can be seen, the valve seat 2 is designed with a first end 21 of the valve seat and a second end 22 extending from the first end of the valve seat, the valve seat outlet cavity 4 being located at the second end 22 of the valve seat. The aim at of design like this disk seat 2 will install in different engine outlet duct departments, so the position of gas outlet also can be different, the utility model provides an EGR valve disk seat structure can be according to the difference of engine gas outlet position and change the disk seat the position of disk seat gas outlet die cavity 4.

Specifically, because the valve seat 2 is provided with a plurality of valve seat air outlet cavities 4, when the EGR valve needs to be installed according to the position of a specific engine air outlet, the angle of the valve seat 2 can be adjusted timely, so that the valve seat air outlet cavity 4 which is most convenient to be closest to the engine is aligned with an engine air outlet pipe.

As shown in fig. 5, the present invention provides a structural schematic diagram of a valve seat structure of an EGR valve. In order to prevent dust, moisture, oil and the like in an engine compartment from contaminating the inside of the EGR valve, a plurality of labyrinth grooves 19 are formed between the dust cap 3 and the valve seat 2 of the EGR valve.

In particular, the labyrinth groove 19 is provided on the valve seat first end 211 of the valve seat 2. According to an object having an inner and an outer division, the valve seat first end 211 has a valve seat first end outer portion 212 and a valve seat first end inner portion 211, wherein the labyrinth groove 19 is provided on the valve seat first end inner portion 211.

The valve seat 2 is integrally cast.

the EGR valve seat 2 is simple in structure, and a cavity 4 at an air outlet of the valve seat is designed in a streamline shape, so that waste gas can flow more smoothly;

the EGR valve seat 2 has two parts, namely a valve seat first end 21 and a valve seat second end 22, so that the requirement of different engines on different positions of an EGR valve air outlet is met;

3, a plurality of lightening grooves are formed in the valve seat 2 of the EGR valve, so that the valve seat 2 is lighter in weight;

4 set up on EGR valve disk seat 2 labyrinth recess for the EGR valve also can normally work under adverse circumstances, has avoided polluting impurity to get into inside the EGR valve, has prolonged life.

The utility model provides a dual one-way flame proof valve of dust environment and flame proof system can real-time supervision valve body both sides pipeline ground pressure, and after pressure sensor will surpass threshold value ground pressure differential conveying and convey to the controller, compressed gas blowing mouth is opened and is blown compressed gas and make the valve plate rotate and then close, realizes initiative two-way flame proof function; compared with the prior product, the utility model has the advantages of do: 1. the valve plate is opened, so that the influence on the air flow in the air pipe is small; 2. the double limiting not only ensures the stability of the normally open state of the valve plate, but also can ensure the effective explosion suppression; 3. the explosion-proof valve has the advantages of simple structure, clear function and high cost performance.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An EGR valve seat structure, characterized in that: the valve seat is provided with a first valve seat end and a second valve seat end extending from the first valve seat end, wherein the second valve seat end is a pipeline penetrating along the axial direction, the outer wall of the second valve seat end is provided with a predetermined number of valve seat air outlet cavities, the valve seat air outlet cavities penetrate through the second valve seat end, the two ends of the valve seat air outlet cavities and the two ends of the second valve seat end are in fluid communication, and the valve seat air outlet cavities are in fluid communication with each other.

2. The EGR valve seat structure of claim 1, wherein said valve seat outlet cavity is contoured to facilitate air flow.

3. The EGR valve seat structure according to claim 1, wherein a plurality of weight-reducing grooves are provided in the valve seat for reducing the mass of the entire electrically powered EGR valve.

4. The EGR valve seat structure according to claim 1, wherein a plurality of labyrinth grooves are provided between a dust cap of the EGR valve and the valve seat.

5. The EGR valve seat structure according to claim 4, wherein said labyrinth groove is provided on said valve seat first end of said valve seat.

6. The EGR valve seat structure of claim 5, wherein said valve seat first end has a valve seat first end outer portion and a valve seat first end inner portion, wherein said labyrinth groove is provided on said valve seat first end inner portion.

7. The EGR valve seat structure according to any of claims 1-6, wherein the valve seat is integrally cast.