阅读说明：本技术 一种带过滤功能的egr密封垫片及其应用 (EGR sealing gasket with filtering function and application thereof ) 是由 王书林 丁光辉 郭晓轩 刘路 赵金旋 冯玮玮 张增光 雷淋森 于 2020-12-04 设计创作，主要内容包括：本发明公开了一种带过滤功能的EGR密封垫片,包括：两个垫片,为板状结构,所述垫片上设置有第一内孔；垫板,所述垫板上设置有第二内孔；两个所述垫片分别贴设于所述垫板的两侧,且所述第一内孔与所述第二内孔同轴设置；滤网,夹设在所述垫片和所述垫板间,且所述滤网附设在所述第二内孔上。该带过滤功能的EGR密封垫片应用于EGR冷却系统中,可对EGR系统中焊接结构产生的焊渣或其他硬质堆积物进行过滤,净化EGR气道,进而保护发动机燃烧室,延长发动机使用寿命。(The invention discloses an EGR (exhaust gas Recirculation) sealing gasket with a filtering function, which comprises: the gasket is of a plate-shaped structure, and a first inner hole is formed in the gasket; the base plate is provided with a second inner hole; the two gaskets are respectively attached to two sides of the base plate, and the first inner hole and the second inner hole are coaxially arranged; the filter screen is clamped between the gasket and the gasket plate, and the filter screen is attached to the second inner hole. This take filtering capability's EGR seal gasket is applied to EGR cooling system in, can filter welding slag or other stereoplasm accumulations that welded structure produced among the EGR system, purifies the EGR air flue, and then protects the engine combustion chamber, extension engine life.)

1. An EGR seal gasket with a filtering function, comprising:

the gasket is of a plate-shaped structure, and a first inner hole is formed in the gasket;

the base plate is provided with a second inner hole; the two gaskets are respectively attached to two sides of the base plate, and the first inner hole and the second inner hole are coaxially arranged;

the filter screen is clamped between the gasket and is attached to the second inner hole; wherein the area of the meshes in the filter screen is not more than 0.5mm²。

2. The filter-enabled EGR gasket seal according to claim 1, wherein the screen is shaped as a planar plate-like structure.

3. The filter-enabled EGR seal gasket of claim 1, wherein the screen shape is a cambered surface structure.

4. The filter EGR gasket seal of claim 1 wherein the mesh openings are evenly distributed across the screen.

5. The filter EGR gasket seal of claim 2 wherein the screen is welded to the backing plate.

6. The filter-enabled EGR seal gasket of claim 1, wherein,

two ends of the gasket are provided with first flange plate structures, and the first flange plate structures are provided with first through holes;

the circumference department of first hole sets up a pressure ripples structure coaxially, pressure ripples structure is made through stamping process.

7. The filter EGR gasket seal of claim 1, wherein the gasket has a second flange structure at both ends, and the second flange structure has a second through hole.

8. The EGR seal gasket with filter function according to claim 1, wherein the gasket, the shim plate, and the screen are made of SUS304 stainless steel.

9. Use of a filter-enabled EGR gasket seal according to claims 1-8 in a connection between an engine aftertreatment device and an EGR cooler.

10. Use of a filter-enabled EGR gasket seal according to claims 1-8 in a connection between an engine EGR valve and an intake of an EGR system.

Technical Field

The utility model relates to an engine exhaust gas recirculation field especially relates to a take filtering capability's EGR seal gasket.

Background

Exhaust Gas Recirculation (EGR) systems, which return part of the exhaust gases from the engine to the inlet duct and re-enter the cylinder together with fresh mixture air, are increasingly used in engines. However, most of the existing EGR systems are arranged behind an after-treatment device such as a three-way catalyst, and most of the three-way catalyst or other after-treatment devices are welded structures, so that welding slag or other hard deposits inevitably exist in the production and manufacturing processes, and after exhaust gas passes through the structures, the hard substances are brought into an engine intake duct and a combustion chamber, so that adverse effects are easily caused to the combustion chamber, and engine knocking is seriously caused.

The existing EGR system is not provided with a filtering device for welding slag or other hard deposits of a welding structure, but directly introduces waste gas containing the welding slag or other hard deposits into a combustion chamber of the engine for secondary combustion, and the combustion chamber is easily damaged by the mode, so that the service life of the engine is reduced to a certain extent.

Disclosure of Invention

Technical problem to be solved

The invention discloses an EGR (exhaust gas recirculation) sealing gasket with a filtering function and application thereof, which solve the problem of filtering welding slag or other hard deposits in an EGR system.

(II) technical scheme

In order to achieve the above object, the present disclosure provides an EGR seal gasket with filtering capability, including: the gasket is of a plate-shaped structure, and a first inner hole is formed in the gasket; the base plate is provided with a second inner hole; the two gaskets are respectively attached to two sides of the base plate, and the first inner hole and the second inner hole are coaxially arranged; a filter screen sandwiched between the gasket and the backing plate and attached to the filter screenOn the second inner hole, wherein the mesh area in the filter screen is not more than 0.5mm²。

Optionally, the filter screen is shaped as a planar plate-like structure.

Optionally, the shape of the screen is a cambered surface structure.

Optionally, the mesh is evenly distributed over the screen.

Optionally, the screen is welded to the backing plate.

Optionally, two ends of the gasket are provided with a first flange structure, and the first flange structure is provided with a first through hole; the circumference department of first hole sets up a pressure ripples structure coaxially, and pressure ripples structure is made through stamping process.

Optionally, two ends of the pad plate are provided with a second flange structure, and the second flange structure is provided with a second through hole.

Optionally, the gasket, the backing plate and the screen are made of SUS304 stainless steel.

The disclosure also provides an application of the EGR sealing gasket with the filtering function, and the EGR sealing gasket with the filtering function is applied to a connecting device between an engine post-processing device and an EGR cooler.

Optionally, the EGR sealing gasket with the filtering function can also be applied to a connecting device between an engine EGR valve and an air inlet channel of an EGR system.

(III) advantageous effects

The invention provides an EGR (exhaust gas Recirculation) sealing gasket with a filtering function and application thereof, wherein the EGR sealing gasket has the beneficial effects that: welding slag or other hard deposits generated by a welding structure in the EGR system are filtered, an EGR air passage is purified, an engine combustion chamber is protected, and the service life of the engine is prolonged.

Drawings

FIG. 1 is an exploded view of an EGR gasket seal with filter function;

FIG. 2 is a top view of an EGR seal gasket with filter functionality;

FIG. 3 is an enlarged view of a cross-sectional view taken along A-A of FIG. 2;

fig. 4 is a schematic view of an application scenario of an EGR gasket with a filtering function.

[ notation ] to show

1-a gasket;

11-a first flange configuration;

12-a pressure wave structure;

13-a first inner bore;

14-a first via;

2-a backing plate;

21-a second inner bore;

22-a second via;

23-a second flange configuration;

and 3, filtering by using a filter screen.

Detailed Description

In order that the objects, technical solutions and advantages of the present invention will become more apparent, the present invention will be further described in detail with reference to the accompanying drawings in conjunction with the following specific embodiments. This invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity, and like reference numerals designate like elements throughout.

The invention provides an EGR (exhaust gas Recirculation) sealing gasket with a filtering function, which is sequentially provided with a gasket 1, a base plate 2, a filter screen 3 and the gasket 1 from top to bottom as shown in figures 1 to 3.

The gasket 1 is provided with a first inner hole 13, the backing plate 2 is provided with a second inner hole 21, and the gasket 1 and the backing plate 2 are both of a plate-shaped structure.

Wherein, the gasket 1 is provided with a first flange structure 11, and the first flange structure 11 is provided with a first through hole 14; the backing plate 2 is provided with a second flange structure 23, the second flange structure 23 is provided with a second through hole 22, and the first through hole 14 and the second through hole 22 have the same size. The outer shapes of the gasket 1 and the backing plate 2 are the same.

The external shapes of the gasket 1 and the backing plate 2 can also be different, and at the moment, the same aperture of the first through hole 14 and the second through hole 22 is ensured, and the two through holes are concentrically arranged; meanwhile, the first inner hole 13 on the gasket 1 and the second inner hole on the backing plate 2 have the same aperture and are concentrically arranged.

The circumference of the inner hole of the gasket 1 is provided with a circle of pressure wave structure 12, the pressure wave structure 12 is supported by a stamping process, and the circumference of the pressure wave structure 12 and the inner hole of the gasket 1 are concentric circles.

The filter screen 3 is a plane circular net structure, the meshes of which are uniformly distributed on the filter screen, and the area of the meshes is not more than 0.5mm²The mesh area is 0.3mm²The filter screen 3 is fixedly connected to the backing plate 2 in a spot welding mode, and the size of the filter screen can completely cover the inner hole of the backing plate 2.

The mesh size on the screen is not limited to the same size, for example, the mesh size may be gradually increased along the screen from inside to outside to adequately filter out the welding slag or other hard deposits of different specifications in the EGR cooling system.

The gasket 1, the backing plate 2 and the filter screen 3 are made of SUS304 stainless steel.

The two gaskets 1 and the base plate 2 fixedly connected with the filter screen 3 can be fixedly connected into a whole in a welding mode to form a middle layer of the whole EGR sealing gasket.

Fig. 4 is an application scenario of an EGR gasket with a filtering function. In a branch of the EGR cooling system as shown in fig. 4, in which one EGR sealing gasket is interposed between the aftertreatment device and the EGR cooler and the other EGR sealing gasket is interposed between the EGR valve and the intake port, the operating temperature of the EGR sealing gasket is-40 ℃ to 200 ℃. This EGR seal gasket is arranged in filtering welding slag or other stereoplasm accumulations among the EGR cooling system, avoids welding slag or other stereoplasm accumulations to get into the combustion chamber, avoids the combustion chamber to take place the phenomenon of knocking, extension engine life.

It should also be noted that directional terms, such as "upper", "lower", "front", "rear", "left", "right", and the like, used in the embodiments are only directions referring to the drawings, and are not intended to limit the scope of the present disclosure. Throughout the drawings, like elements are represented by like or similar reference numerals. In the event of possible confusion for understanding of the present disclosure, conventional structures or configurations will be omitted, and the shapes and sizes of the components in the drawings do not reflect actual sizes and proportions, but merely illustrate the contents of the embodiments of the present disclosure.

The embodiments described above may be mixed and matched with each other or with other embodiments based on design and reliability considerations, i.e. technical features in different embodiments may be freely combined to form further embodiments.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.