EGR lift valve embedded assembly structure

Abstract

The utility model discloses an EGR (exhaust gas recirculation) poppet valve embedded component structure which comprises a neck bush and a sealing seat, the neck bush comprises a first bush, a connecting sleeve and a second bush, and one end of the first bush is connected with the connecting sleeve; an exhaust channel is formed in the first bushing, and a first flange is arranged at one end, deviating from the connecting sleeve, of the first bushing; an air inlet channel is formed in the second bush edge, a second flange is arranged at the end, away from the connecting sleeve, of the second bush, and a valve clack containing cavity is formed in the end, close to the connecting sleeve, of the second bush. The EGR lift valve has the advantages that the neck bush and the sealing seat are integrated and embedded in the valve body, it is guaranteed that the aluminum valve body does not make contact with waste gas, the corrosion resistance of the EGR lift valve is improved, the flange design is adopted at the gas inlet and the gas outlet of the neck bush, it is guaranteed that the waste gas inlet and outlet do not make contact with the end face of the aluminum valve body, the end face sealing failure phenomenon caused by corrosion is avoided, and the service life of the EGR lift valve is prolonged. And the service life of the EGR lift valve can be effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of EGR poppet valves, in particular to an EGR poppet valve embedded component structure. Background Art

[0002] The EGR poppet valve is a unit used in automotive gasoline engine exhaust gas recycling (EGR) systems to precisely control exhaust gas flow. Exhaust gas flows through the internal flow path of the EGR poppet valve, with flow controlled by the valve opening and closing. Because gasoline engine exhaust contains large amounts of corrosive gases, these gases, when flowing through the EGR poppet valve body airway, corrode the inner wall of the EGR poppet valve airway, generating impurities. These impurities, along with the reciprocating motion of the valve stem, can easily enter the mating surface between the seal guide mechanism and the valve stem, increasing wear or causing the valve stem to lock. This can lead to the EGR poppet valve becoming stuck or the valve stem guide seal malfunctioning. Flange end face corrosion can also cause flange face seal failure, resulting in air leakage. This not only affects EGR poppet valve performance, but also increases valve noise and reduces its lifespan. Utility Model Content

[0003] To this end, the utility model provides an EGR poppet valve embedded component structure to solve the above-mentioned problems in the prior art.

[0004] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0005] According to a first aspect of the present invention, an EGR poppet valve embedded assembly structure includes an inner sleeve and a sealing seat, wherein the inner sleeve includes a first sleeve, a connecting sleeve, and a second sleeve, wherein one end of the first sleeve is connected to the connecting sleeve;

[0006] The sealing seat is arranged at one end of the connecting sleeve, and one end of the second bushing is connected to the end of the connecting sleeve away from the sealing seat;

[0007] The sealing seat is provided with a valve stem channel and a support frame accommodating cavity;

[0008] An exhaust passage is provided in the first bushing, and a first flange is provided at one end of the first bushing away from the connecting sleeve;

[0009] The second bushing is provided with an air inlet passage along its axis, the end of the second bushing away from the connecting sleeve is provided with a second flange, and the end of the second bushing close to the connecting sleeve is provided with a valve flap accommodating cavity.

[0010] Furthermore, the support frame accommodating cavity is coaxial with the valve stem channel, and the support frame accommodating cavity is located in the middle of the valve stem channel, and an air leakage hole is provided on the side wall of the support frame accommodating cavity.

[0011] Furthermore, the air leakage hole is a circular hole.

[0012] Furthermore, the sealing seat and the inner sleeve are an integral structure, the first sleeve is arranged in a direction perpendicular to the connecting sleeve, and the sealing seat, the connecting sleeve and the second sleeve are coaxial.

[0013] Furthermore, the sealing seat and the inner sleeve are both made of corrosion-resistant materials.

[0014] Furthermore, the sealing seat and the inner sleeve are both made of stainless steel.

[0015] Furthermore, the first bushing, the connecting sleeve and the second bushing are all cylindrical.

[0016] Furthermore, the support frame accommodating cavity is coaxial with the valve stem channel, and the support frame accommodating cavity is located in the middle of the valve stem channel.

[0017] The utility model has the following advantages: the inner sleeve and the sealing seat are an integral whole, embedded in the valve body, ensuring that the aluminum valve body has no contact with the exhaust gas, and improving the corrosion resistance of the EGR poppet valve, wherein the inner sleeve adopts a flange design at the inlet and outlet, ensuring that the exhaust gas inlet and outlet have no contact with the end face of the aluminum valve body, avoiding the end face sealing failure caused by corrosion, and effectively extending the service life of the EGR poppet valve; in terms of materials, the inner sleeve and the sealing seat constituting the air duct are made of stainless steel, which has stronger corrosion resistance than the valve body structure of the ordinary aluminum cast EGR poppet valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely illustrative, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons skilled in the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, provided they do not affect the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0020] Figure 1 A first perspective view of an EGR poppet valve embedded component structure provided in some embodiments of the present invention.

[0021] Figure 2 A second perspective view of an EGR poppet valve embedded component structure provided in some embodiments of the present invention.

[0022] Figure 3 This is a front view of an EGR poppet valve embedded component structure provided in some embodiments of the present invention.

[0023] Figure 4 A cross-sectional view of an EGR poppet valve embedded component structure provided in some embodiments of the present invention.

[0024] Figure 5 This is a schematic structural diagram of an EGR poppet valve embedded component structure after installation provided in some embodiments of the present invention.

[0025] In the figure: 1. first bushing, 2. sealing seat, 3. connecting sleeve, 4. second bushing, 5. first flange, 6. second flange, 7. vent hole, 8. support frame accommodating chamber, 9. valve disc accommodating chamber, 10. valve body, 11. valve stem sleeve, 12. grid ring, 13. support frame, 14. inner bushing. DETAILED DESCRIPTION

[0026] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can readily understand the other advantages and benefits of the present invention from the contents disclosed in this specification. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0027] Example 1

[0028] like Figures 1 to 5 As shown, an EGR poppet valve embedded assembly structure in an embodiment of the first aspect of the present invention includes an inner sleeve 14 and a sealing seat 2. The inner sleeve 14 includes a first sleeve 1, a connecting sleeve 3, and a second sleeve 4. The first sleeve 1 is arranged in a direction perpendicular to the connecting sleeve 3, and one end of the first sleeve 1 is connected to the connecting sleeve 3.

[0029] The sealing seat 2, the connecting sleeve 3 and the second bushing 4 are coaxial. The sealing seat 2 is arranged at one end of the connecting sleeve 3. One end of the second bushing 4 is connected to the end of the connecting sleeve 3 away from the sealing seat 2.

[0030] The sealing seat 2 is provided with a valve stem passage and a support frame accommodating cavity 8 along its axis. The support frame accommodating cavity 8 is coaxial with the valve stem passage and is located in the middle of the valve stem passage.

[0031] The first bushing 1 is provided with an exhaust passage along its axial direction. A first flange 5 is provided at one end of the first bushing 1 away from the connecting sleeve 3. The first flange 5 is annular and is provided along the radial direction of the first bushing 1.

[0032] The second bushing 4 is provided with an air inlet passage along its axis. A second flange 6 is provided at one end of the second bushing 4 facing away from the connecting sleeve 3. The second flange 6 is annular and arranged radially along the second bushing 4. A valve disc accommodating cavity 9 is provided at one end of the second bushing 4 close to the connecting sleeve 3. The air inlet passage, the valve disc accommodating cavity 9 and the exhaust passage are interconnected.

[0033] The first bushing 1 , the connecting sleeve 3 and the second bushing 4 are all cylindrical, and the first bushing 1 , the connecting sleeve 3 and the second bushing 4 are an integrated structure.

[0034] In this embodiment, it should be noted that the sealing seat 2 and the inner sleeve 14 are an integral structure, and both the sealing seat 2 and the inner sleeve 14 are made of corrosion-resistant materials. Specifically, the sealing seat 2 and the inner sleeve 14 are made of stainless steel. The inner sleeve 14 and the sealing seat 2 constituting the air passage are both made of stainless steel, which has a stronger corrosion resistance than the valve body structure of an ordinary aluminum cast EGR poppet valve.

[0035] In addition, the specific structure of the inner sleeve 14 is processed and manufactured according to the internal structure of the valve body of the EGR poppet valve, and the specific structure of the inner sleeve 14 is not limited to the structure described in this embodiment.

[0036] Furthermore, during processing, after the inner sleeve 14 and the sealing seat 2 are made, they are placed in a mold, and then the valve body 10 is made outside the inner sleeve 14 and the sealing seat 2 by using an insert casting process to ensure that the valve body structure is reliable. The assembled structure is as follows Figure 5 As shown, the valve stem is sealed in the form of a double grid ring. Specifically, a support skeleton 13 is provided on the outside of a section of the valve stem in the support frame accommodating cavity 8. A grid ring 12 is respectively provided at the top and bottom ends of the support skeleton 13, and a valve stem sleeve 11 is provided on the part of the valve stem above the support skeleton 13. The inner sleeve 14 and the sealing seat 2 are a whole and embedded in the valve body 10 to ensure that the aluminum valve body has no contact with the exhaust gas, thereby improving the corrosion resistance of the EGR lift valve. The inner sleeve 14 adopts a flange design at the inlet and outlet to ensure that the exhaust gas inlet and outlet have no contact with the end face of the aluminum valve body, thereby avoiding end face sealing failure caused by corrosion, and can effectively extend the service life of the EGR lift valve.

[0037] The technical effect achieved by this embodiment is as follows: by analyzing the causes of carbon deposit sticking and sealing failure of the EGR poppet valve stem, valve body corrosion, and flange end face corrosion, an integrated structure of the inner sleeve 14 and the sealing seat 2 is designed and manufactured, thereby isolating the valve body 10 from the exhaust gas, effectively improving the corrosion resistance of the EGR poppet valve, reducing the risk of failure of the EGR poppet valve due to corrosion, and greatly extending the service life of the EGR poppet valve.

[0038] Example 2

[0039] like Figures 1 to 5 As shown, this embodiment provides another EGR lift valve embedded component structure, whose structure includes all the contents of embodiment 1, and only the different parts are described below.

[0040] In this embodiment, an air leakage hole 7 is provided on the side wall of the support frame accommodating cavity 8 .

[0041] In this embodiment, it should be noted that the air leakage hole 7 is a circular hole. The air leakage hole 7 can be set to one or more according to usage requirements. The valve body 10 is provided with corresponding exhaust holes, and the exhaust holes and the air leakage holes 7 are set in a one-to-one correspondence.

[0042] The technical effect achieved by this embodiment is that by providing the vent hole 7, when a small amount of exhaust gas leaks into between the two grid rings 12, it can be discharged into the atmosphere in time, ensuring that the upper position is not corroded by the exhaust gas.

[0043] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, such modifications or improvements, without departing from the spirit of the present invention, are within the scope of protection claimed herein.

[0044] The terms "upper", "lower", "left", "right", "middle", etc. used in this specification are only for the convenience of description and are not intended to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be considered as the scope of implementation of the present invention without substantially changing the technical content.

Claims

1. An EGR poppet valve embedded component structure, characterized in that: It comprises an inner sleeve (14) and a sealing seat (2), wherein the inner sleeve (14) comprises a first sleeve (1), a connecting sleeve (3) and a second sleeve (4), and one end of the first sleeve (1) is connected to the connecting sleeve (3); The sealing seat (2) is arranged at one end of the connecting sleeve (3), and one end of the second bushing (4) is connected to an end of the connecting sleeve (3) facing away from the sealing seat (2); The sealing seat (2) is provided with a valve stem channel and a support frame accommodating cavity (8); An exhaust passage is provided in the first bushing (1), and a first flange (5) is provided at one end of the first bushing (1) facing away from the connecting sleeve (3); An air inlet passage is provided in the second bushing (4), a second flange (6) is provided at one end of the second bushing (4) facing away from the connecting sleeve (3), and a valve disc accommodating cavity (9) is provided at one end of the second bushing (4) close to the connecting sleeve (3).

2. The EGR poppet valve embedded component structure according to claim 1, characterized in that: The support frame accommodating chamber (8) is coaxial with the valve stem channel, and the support frame accommodating chamber (8) is located in the middle of the valve stem channel. An air leakage hole (7) is provided on the side wall of the support frame accommodating chamber (8).

3. The EGR poppet valve embedded component structure according to claim 2, characterized in that: The air leakage hole (7) is a circular hole.

4. The EGR poppet valve embedded component structure according to claim 1, characterized in that: The sealing seat (2) and the inner sleeve (14) are an integral structure, the first sleeve (1) is arranged in a direction perpendicular to the connecting sleeve (3), and the sealing seat (2), the connecting sleeve (3) and the second sleeve (4) are coaxial.

5. The EGR poppet valve embedded component structure according to claim 4, characterized in that: The sealing seat (2) and the inner sleeve (14) are both made of corrosion-resistant materials.

6. The EGR poppet valve embedded component structure according to claim 5, characterized in that: The sealing seat (2) and the inner sleeve (14) are both made of stainless steel.

7. The EGR poppet valve embedded component structure according to claim 1, characterized in that: The first bushing (1), the connecting sleeve (3) and the second bushing (4) are all cylindrical.

8. The EGR poppet valve embedded component structure according to claim 1, characterized in that: The support frame accommodating cavity (8) is coaxial with the valve stem channel, and the support frame accommodating cavity (8) is located in the middle of the valve stem channel.

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