KR20190077854A - EGR Valve Having Valve Shaft With Groove - Google Patents

Abstract

Disclosed is an EGR valve including a valve shaft with a groove formed therein. According to an embodiment of the present invention, an EGR valve for opening and closing an inlet passage or an outlet passage of exhaust gas by rotating a valve mounted on an end portion of a valve shaft by rotating the valve shaft by a predetermined angle around a central axis comprises: a base having a rotation through hole formed in a direction corresponding to a vertical extension direction of the valve shaft; at least one groove formed in a vertical direction at a position corresponding to the rotation through hole of the outer circumferential surface of the valve shaft; and a vent hole communicating with the outside of the EGR valve, formed in the base, and communicating with a portion of the groove. According to the present invention, the valve shaft can be prevented from being stuck by foreign matter penetrating the valve shaft, the durability can be increased by enhancing the function of removing foreign matters from between the valve shaft and housing, and the quality can be ensured by increasing the durability.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an EGR valve,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an easy valve, and more particularly, to an easy valve including a structure capable of preventing a valve shaft from being stuck by foreign matter penetrating into the valve shaft.

Generally, nitrogen oxides (NOx) are generated by the combination of oxygen and nitrogen at high pressure and high temperature. In order to suppress this, a part of the exhaust gas discharged into the atmosphere is supplied again to the intake system side to lower the maximum combustion temperature, An exhaust gas recirculation (EGR) system is used to reduce the supply and reduce the production of nitrogen oxides.

Since the combustion state of the fuel depends on the amount of the exhaust gas that is supplied to the intake system side again in the exhaust gas recirculation (EGR) system, a part of the exhaust gas discharged from the exhaust gas recirculation system ) And particulate matter (PM).

As described above, in the exhaust gas recirculation (EGR) system, the amount of the exhaust gas to be returned is important, and the EGR valve controls the returned exhaust gas. Therefore, the EGR valve is the most important in the exhaust gas recirculation (EGR) system, and therefore, various EGR valve technologies have been proposed.

FIG. 1 is a cross-sectional view showing an easy-to-operate valve driven by a motor according to the prior art.

Referring to FIG. 1, a rotary through-hole 15 having a structure corresponding to the outer circumferential surface of the valve shaft 12 is formed in the base 11 of the easy- . At this time, a valve 13 for opening / closing the inlet passage and the outlet passage of the exhaust gas may be mounted at one end of the valve shaft 12.

At this time, the foreign matter contained in the exhaust gas flowing through the inlet passage and the outlet passage of the exhaust gas can penetrate into the inside of the rotary through hole 15 in which the valve shaft 12 is mounted. The impregnated foreign matter becomes solid as time passes and acts as a factor for hindering the rotational drive of the valve shaft 12. [

In order to solve such a problem, as shown in FIG. 1, a vent hole 14 is formed to communicate with a part of the valve shaft 12 to discharge foreign matter penetrating into the rotary through hole 15 to the outside have.

However, the structure according to the related art is not a structure that can effectively discharge foreign substances to the outside, and has a problem in that there is a limit in discharging foreign matter.

Therefore, there is a need for a technique capable of solving the problems of the above-mentioned conventional arts.

Korean Patent Publication No. 10-2017-0090251 (published on August 07, 2017)

It is an object of the present invention to provide a valve seat which can prevent the valve shaft from sticking due to foreign matter penetrating into the valve shaft, enhance the durability by enhancing the foreign matter removing function between the valve shaft and the housing, To provide an easily accessible valve.

According to an aspect of the present invention, there is provided an easy-to-open valve, wherein a valve mounted on an end of a valve shaft is rotated by rotating a valve shaft by a predetermined angle about a central axis, An easy valve for opening and closing a valve, comprising: a base having a through-hole formed in a direction corresponding to a vertical direction of a valve shaft; A groove formed at one or more positions in a vertical direction at a position corresponding to a rotary through hole on the outer circumferential surface of the valve shaft; And a vent hole communicating with the outside of the easy valve and formed inside the base and communicating with a part of the groove.

In one embodiment of the present invention, the vent hole formed in the base may be formed in a direction forming a predetermined angle with the forming direction of the rotary through-hole on the side surface.

In this case, the vent hole formed in the base may be formed in a direction perpendicular to the forming direction of the rotary through-hole on the side surface.

In one embodiment of the present invention, the groove may be formed in an inclined structure on the outer circumferential surface of the valve shaft.

In this case, the grooves may have a structure inclined at an acute angle with the extending direction of the valve shaft.

In an embodiment of the present invention, two or more grooves may be formed on the outer circumferential surface of the valve shaft so as to surround the valve shaft by a predetermined distance.

In this case, the groove may be formed in an inclined structure on the outer peripheral surface of the valve shaft. At this time, the groove may be inclined in an acute angle with the extending direction of the valve shaft.

In one embodiment of the present invention, the uppermost position of the groove may be a structure located within the inner diameter of the vent hole.

In this case, the uppermost position of the groove may be located at a height of 80 to 99% of the inner diameter of the vent hole from the bottom surface of the vent hole.

In an embodiment of the present invention, the grooved portion of the valve shaft may be a structure that can be disassembled and assembled from the valve shaft.

In one embodiment of the present invention, the side cross-sectional shape of the vent hole may be a venturi structure in which an inner diameter is changed in an outward direction.

As described above, according to the easy valve of the present invention, it is possible to prevent the valve shaft from being stuck due to the foreign matter penetrating into the valve shaft by providing the base, the groove and the vent hole having a specific structure, It is possible to provide an easy-to-operate valve that can enhance the durability by enhancing the function of removing foreign substances between the housings and can ensure the quality due to the increase in durability.

In addition, according to the easy valve of the present invention, two or more grooves having a structure inclined at a specific range of angles are formed at the outer circumferential surface of the valve shaft at a predetermined distance, so that the valve shaft is rotated between the valve shaft and the rotary through- It is possible to easily move the foreign matter infiltrated into the space or the vent hole where the valve is located, as a result, the valve shaft fixing phenomenon due to the deposition of foreign matter can be fundamentally blocked.

According to the easy valve of the present invention, grooves having a structure inclined at a specific range of angles are formed at the outer circumferential surface of the valve shaft at two or more intervals, At this time, the groove between the valve shaft and the housing is tilted by the groove of the specific structure, and the flow velocity is increased to increase the deviation of the foreign matter.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an easy valve according to the prior art; FIG.
2 is a cross-sectional view illustrating an easy valve according to one embodiment of the present invention.
3 is a sectional view showing a forming position of the groove shown in Fig.
4 is a front view of a valve shaft of an easy valve according to an embodiment of the present invention.
5 is a front view showing a valve shaft of an easy valve according to another embodiment of the present invention.
6 is a front view showing a valve shaft of an easy valve according to another embodiment of the present invention.
7 is a front view showing a valve shaft of an easy valve according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. Prior to the description, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and should be construed in accordance with the technical concept of the present invention.

Throughout this specification, when a member is "on " another member, this includes not only when the member is in contact with another member, but also when there is another member between the two members. Throughout this specification, when an element is referred to as "including" an element, it is understood that it may include other elements as well, without departing from the other elements unless specifically stated otherwise.

FIG. 2 is a cross-sectional view showing an easy valve according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view showing a forming position of the groove shown in FIG.

Referring to these drawings, the easy valve 100 according to the present embodiment is configured such that the valve 130 mounted on the end of the valve shaft 120 by the valve shaft 120 is rotated by a predetermined angle about the central axis, And may be a structure having a base 110, a groove 121, and a vent hole 140 of a specific structure, which open and close the inlet passage and the outlet passage of the exhaust gas.

The easy valve 100 according to the present embodiment including this configuration can prevent the valve shaft from sticking due to foreign matter penetrating into the valve shaft and enhance the durability by enhancing foreign matter removal function between the valve shaft and the housing. It is possible to provide an easy-to-operate valve capable of ensuring quality due to an increase in durability.

Hereinafter, each configuration of the easy valve 100 according to the present embodiment will be described in detail with reference to the drawings.

In the base 110 according to the present embodiment, the through-hole 111 may be formed in a direction corresponding to the up-and-down direction of the valve shaft 120.

One or more grooves 121 may be formed on the outer circumferential surface of the valve shaft 120 according to the present embodiment in a vertical direction at a position corresponding to the rotary through hole 111. [ At this time, the groove 121 may be formed in an inclined structure on the outer peripheral surface of the valve shaft 120.

4 and 5, the grooves 121 may be inclined in a direction at an acute angle with the direction in which the valve shaft 120 extends.

More specifically, on the outer circumferential surface of the valve shaft 120 according to the present embodiment, two or more grooves 121 may be formed to surround the valve shaft 120 by a predetermined distance. At this time, the groove 121 is preferably formed in an inclined structure on the outer circumferential surface of the valve shaft 120, and may be inclined in a direction forming an acute angle with the extending direction of the valve shaft 120.

Thus, according to the present embodiment, two or more grooves 121 having an inclined structure with a specific range of angles are formed at the outer circumferential surface of the valve shaft 120 at a predetermined distance, It is possible to easily move the foreign matter infiltrated between the shaft 120 and the rotary through hole 111 to the space where the valve 130 is located or the vent hole 140. As a result, .

The vent hole 140 according to the present embodiment may be structured to communicate with the outside of the easy valve 100, to be formed inside the base 110, and to communicate with a part of the groove 121 .

Concretely, the vent hole 140 formed in the base 100 may be formed in a direction forming a predetermined angle with the forming direction of the rotary through-hole 111 on the side surface. The vent hole 140 formed in the base 110 may be formed in a direction perpendicular to the forming direction of the rotary through hole 111 on the side surface.

3, it is preferable that the uppermost position of the groove 121 according to the present embodiment is located within the inner diameter of the vent hole 140. As shown in FIG.

Specifically, the uppermost position H1 of the groove 121 may be located at a height of 80 to 99% of the vent hole inner diameter (ID) from the bottom surface of the vent hole 140.

6 is a front view showing a valve shaft of an easy valve according to another embodiment of the present invention.

6, the portion of the valve shaft 120 in which the groove 121 is formed according to the present embodiment may be a structure 122 that can be disassembled and assembled from the valve shaft 120.

In this case, the separation structure 122 in which the groove 121 is formed may be connected to the seating structure 123 formed on the outer circumferential surface of the valve shaft 120 by a bolting method or an interference fit method.

In this case, the separation structure 122 formed with the grooves 121 is formed separately and bound to the valve shaft 120, so that the valve shaft 120 can be formed with a simpler manufacturing process. In accordance with the operating environment, The valve shaft 120 can be manufactured in accordance with various operating environments by forming and separating the separating structure 122 in which the shape of the valve shaft 120 is changed.

7 is a front view showing a valve shaft of an easy valve according to another embodiment of the present invention.

Referring to FIG. 7, the vent hole 140 of the easy valve 100 according to the present embodiment may be a ventury structure in which the inner diameter is changed in the direction toward the outside on the side surface.

In this case, the pressure difference according to the intention of the designer can be applied to the gas guided through the vent hole 140, so that the venturi structure appropriately applied according to the operating environment can be configured to induce effective removal of foreign matter.

In the foregoing detailed description of the present invention, only specific embodiments thereof have been described. It is to be understood, however, that the invention is not to be limited to the specific forms thereof, which are to be considered as being limited to the specific embodiments, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. .

That is, the present invention is not limited to the above-described specific embodiment and description, and various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. And such variations are within the scope of protection of the present invention.

10: Easy valve according to the prior art
11: Base
12: Valve shaft
13: Valve
14: Vent hole
15:
100: Easy Valve
110: Base
111:
120: valve shaft
121: Groove
122: Separated structure
123: seat structure
130: Valve
140: vent hole
141: Venturi structure

Claims (12)

The valve shaft 120 rotates about the central axis by a predetermined angle and the valve 130 mounted on the end of the valve shaft 120 rotates to open and close the inlet passage and the outlet passage of the exhaust gas As a result,
A base 110 having a rotation through-hole 111 formed in a direction corresponding to a vertical direction of the valve shaft 120;
A groove 121 formed at one or more positions in the vertical direction at a position corresponding to the rotary through hole 111 of the outer peripheral surface of the valve shaft 120; And
A vent hole 140 communicating with the outside of the easy valve 100 and formed inside the base 110 and communicating with a part of the groove 121;
Wherein the valve comprises a valve body.
The method according to claim 1,
Wherein the vent hole (140) formed in the base (100) is formed in a direction forming a predetermined angle with the forming direction of the rotary through hole (111) on the side surface.
3. The method of claim 2,
Wherein the vent hole (140) formed in the base (110) is formed in a direction perpendicular to the forming direction of the rotary through hole (111) on the side surface.
The method according to claim 1,
Wherein the grooves (121) are formed in an inclined structure on an outer circumferential surface of the valve shaft (120).
5. The method of claim 4,
Wherein the groove (121) is inclined in a direction that forms an acute angle with an extending direction of the valve shaft (120).
The method according to claim 1,
Wherein two or more grooves (121) are formed on the outer circumferential surface of the valve shaft (121) so as to surround the valve shaft (120) by a predetermined distance.
The method according to claim 6,
Wherein the grooves (121) are formed in an inclined structure on an outer circumferential surface of the valve shaft (120).
8. The method of claim 7,
Wherein the groove (121) is inclined in a direction that forms an acute angle with an extending direction of the valve shaft (120).
The method according to claim 1,
Wherein an uppermost position of the groove (121) is located within an inner diameter of the vent hole (140).
10. The method of claim 9,
Wherein an uppermost position (H1) of the groove (121) is located at a height of 80 to 99% from a bottom surface of the vent hole (140) with respect to the vent hole inner diameter (ID).
The method according to claim 1,
Wherein the portion of the valve shaft (120) where the groove (121) is formed is a structure (122) that can be disassembled and assembled from the valve shaft (120).
The method according to claim 1,
Wherein the side cross-sectional shape of the vent hole (140) is a venturi structure (141) whose inner diameter changes in a direction toward the outside.

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