Valve body and vehicle

Abstract

The embodiment of the utility model provides a valve body and a vehicle. The valve body comprises a valve sleeve and a valve rod, the valve sleeve is connected with the valve rod in a sleeved mode, and the valve rod can move relative to the valve sleeve in the axial direction of the valve sleeve so as to open or close the valve body. The valve sleeve comprises a cavity, the cavity penetrates through the valve sleeve in the axial direction of the valve sleeve, and at least part of the valve rod is located in the cavity. The groove is recessed in the direction away from the interior of the cavity and extends in the circumferential direction of the valve sleeve. The valve sleeve is provided with a first end and a second end in the axial direction of the valve sleeve, the first end is located above the second end, and a gap is formed between the groove and the first end, that is, the groove does not penetrate through the upper end of the valve sleeve. The groove is formed in the inner wall of the valve sleeve, the contact area between the valve sleeve and the valve rod can be reduced, impurities, condensate water containing corrosive ions and the like can enter the groove, and therefore the influence of the impurities on relative movement between the valve rod and the valve sleeve is reduced, the possibility of abrasion of the valve sleeve and the valve rod is reduced, and the movement stability of the whole system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, in particular to a valve body and a vehicle. BACKGROUND

[0002] With the development of technology, automobiles have become common transportation tools in people's daily life. An EGR system is usually provided in a vehicle to reduce the emission of nitrogen oxides, improve the combustion environment, and improve the working efficiency of an engine. An EGR valve (exhaust gas recirculation valve) is an important component in the EGR system. Corrosive Cl and F ions exist in the exhaust gas of the engine. After the engine is stopped, condensed water containing corrosive ions is generated. The condensed water and some other impurities are easily present on the cooperation surface of a valve rod and a valve sleeve of the EGR valve, which hinders the relative movement of the valve rod and the valve sleeve, and causes the valve sleeve to rust, thereby affecting the normal use of the EGR valve and causing the EGR function to fail. CONTENT OF THE UTILITY MODEL

[0003] The valve body and the vehicle provided by the embodiments of the present application are used to improve the stability of the valve body in operation.

[0004] The valve body provided by the embodiments of the present application comprises:

[0005] a valve rod;

[0006] a valve sleeve, which is sleeved with the valve rod;

[0007] The valve sleeve comprises a cavity, the cavity penetrates the valve sleeve along the axial direction of the valve sleeve, at least part of the valve rod is located in the cavity, a side wall of the cavity is provided with at least one groove, the groove is recessed in a direction away from the inside of the cavity and extends along the axial direction of the valve sleeve, along the axial direction of the valve sleeve, the valve sleeve has a first end and a second end, the first end is located above the second end, and the groove has a spacing with the first end.

[0008] In a possible implementation, along the axial direction of the valve sleeve, the distance between the groove and the first end is 5-8 mm.

[0009] In a possible implementation, along the axial direction of the valve sleeve, the groove penetrates the second end.

[0010] In a possible implementation, along the axial direction of the valve sleeve, the size of the valve sleeve is a, the size of the groove is b, and 1 / 2a≤b≤2 / 3a.

[0011] In a possible implementation, along the axial direction of the valve sleeve, the size of the groove is 5-14 mm.

[0012] In a possible implementation, the depth of the groove is 0.5 mm to 1.5 mm along the radial direction of the valve sleeve.

[0013] In a possible implementation, the width of the groove is 0.5 mm to 4 mm.

[0014] In a possible implementation, the opening of the groove is located at the side of the groove facing the inside of the cavity and communicates with the cavity, and the sum of the projection sizes of the opening is m, the projection of the cavity is n, and 0.2n≤m≤0.5n in the projection along the axial direction of the valve body.

[0015] In a possible implementation, the number of the grooves is 2 to 8.

[0016] The embodiments of the present application also provide a vehicle, which comprises the valve body described in any one of the above.

[0017] The embodiments of the present application provide a valve body and a vehicle. The valve body comprises a valve sleeve and a valve rod, the valve sleeve is sleeved with the valve rod, and the valve rod can move relative to the valve sleeve along the axial direction of the valve sleeve to open or close the valve body. The valve sleeve comprises a cavity, the cavity penetrates through the valve sleeve along the axial direction of the valve sleeve, and at least part of the valve rod is located in the cavity. A groove is recessed in the direction away from the inside of the cavity and extends along the circumferential direction of the valve sleeve. The valve sleeve has a first end and a second end along the axial direction of the valve sleeve, the first end is located above the second end, and the groove has a spacing from the first end, that is, the groove does not penetrate through the upper end of the valve sleeve. By arranging the groove on the inner wall of the valve sleeve, the contact area between the valve sleeve and the valve rod can be reduced, impurities, condensed water containing corrosive ions and the like can enter the groove, thereby reducing the influence of impurities on the relative movement between the valve rod and the valve sleeve and reducing the possibility of wear of the valve sleeve and the valve rod, which is conducive to improving the stability of the overall system movement. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 The structural schematic diagram of the valve body provided by the embodiments of the present application;

[0020] Figure 2 The sectional view of the valve sleeve provided by the embodiments of the present application;

[0021] Figure 3 The structural schematic diagram of the valve sleeve provided by the embodiments of the present application;

[0022] Figure 4 A bottom view of the valve sleeve provided by the embodiments of the present application.

[0023] Reference signs

[0024] 1 - valve stem;

[0025] 2 - valve sleeve;

[0026] 21 - cavity;

[0027] 22 - groove;

[0028] 221 - opening;

[0029] 23 - first end;

[0030] 24 - second end. DETAILED DESCRIPTION

[0031] In order to better understand the technical solutions of the present application, the embodiments of the present application are described in detail below in combination with the drawings.

[0032] It should be clear that the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0033] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0034] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0035] As Figure 1 , Figure 2 and Figure 3As shown, the embodiment of the present application provides a valve body, which is applied to a vehicle and can be an EGR valve. The valve body includes a valve sleeve 2 and a valve rod 1. The valve sleeve 2 is sleeved with the valve rod 1. The valve rod 1 can move relative to the valve sleeve 2 along the axial direction of the valve sleeve 2 to open or close the valve body. The valve sleeve 2 includes a cavity 21. The cavity 21 penetrates through the valve sleeve 2 along the axial direction of the valve sleeve 2. At least a part of the valve rod 1 is located in the cavity 21. The cavity 21 can guide the movement of the valve rod 1. The side wall of the cavity 21 is provided with at least one groove 22. The groove 22 is recessed away from the inside of the cavity 21 and extends along the circumferential direction of the valve sleeve 2. The valve sleeve 2 has a first end 23 and a second end 24 along the axial direction of the valve sleeve 2. The first end 23 is located above the second end 24. The groove 22 has a spacing from the first end 23, that is, the groove 22 does not penetrate through the upper end of the valve sleeve 2.

[0036] When the valve body is an EGR valve, the EGR valve is an important part for controlling the amount of exhaust gas entering the engine in the exhaust gas recirculation system. Corrosive Cl ions and F ions are generated in the exhaust gas of the engine. After the engine is stopped, the condensate containing corrosive ions is generated on the inner wall of the flow pipeline of the EGR system, for example, between the valve rod 1 and the valve sleeve 2. The material of the valve sleeve 2 is usually copper alloy. After being contacted with the condensate containing corrosive ions, copper rust, aluminum rust and other corrosive substances are easily generated. The accumulation of corrosive substances increases the movement resistance of the valve rod 1, which easily causes the valve rod 1 to be stuck, the EGR system cannot work normally, and the EGR function fails.

[0037] In the scheme provided by the embodiment of the present application, by providing the groove 22 on the inner wall of the valve sleeve 2, the contact area between the valve sleeve 2 and the valve rod 1 can be reduced, so that the movement resistance between the valve rod 1 and the valve sleeve 2 can be reduced, and the possibility of the valve rod 1 being stuck can be reduced. The impurities in the medium flowing in the valve body, the condensate containing corrosive ions and the like can enter the groove 22, so that the possibility of the impurities and the generated corrosive substances contacting the valve rod 1 can be reduced, thereby reducing the influence of the impurities on the relative movement between the valve rod 1 and the valve sleeve 2 and the possibility of the valve sleeve 2 and the valve rod 1 being worn, which is conducive to improving the stability of the overall system movement, prolonging the service life of the valve body and more meeting the actual use requirements. The groove 22 has a spacing from the first end 23, which can be conducive to improving the sealing performance of the side where the first end 23 is located, reducing the influence of the groove 22 on the sealing performance of the valve body and reducing the influence of the impurities, the condensate and the like entering the side where the first end 23 of the valve body is located. Usually, the driving member for controlling the movement of the valve rod 1 and other electronic components are arranged on the side where the first end 23 of the valve sleeve 2 is located. By improving the sealing performance of the first end 23, the impurities and the condensate and the like can be prevented from entering the end of the valve body where the electronic components are located, so that the influence of the impurities and the condensate and the like on the electronic components can be reduced.

[0038] As shown, Figure 2As shown, in one possible embodiment, the distance between the recess and the first end 23 along the circumference of the valve sleeve 2 is 5 mm to 8 mm. The distance between the groove 22 and the first end 23 can be 5.0 mm, 5.5 mm, 6.0 mm, 6.5 mm, 7.0 mm, 7.5 mm, 8.0 mm, etc.

[0039] When the distance between the groove 22 and the first end 23 is less than 5 mm, the distance between the groove 22 and the first end 23 of the valve sleeve 2 is too close, which will affect the sealing performance of the first end 23 of the valve sleeve 2, and impurities and condensate can easily enter the side where the first end 23 is located. When the distance between the groove 22 and the first end 23 is greater than 8 mm, the distance between the groove 22 and the first end 23 is too large, which will affect the overall size of the groove 22, causing the size of the groove 22 to be too small, thus affecting the effect of opening the groove 22. Therefore, the distance between the groove 22 and the first end 23 can usually be between 5 mm and 8 mm.

[0040] like Figure 2 As shown, in one possible implementation, the groove 22 extends through the second end 24.

[0041] This design allows the groove 22 to have a notch along the axial direction of the valve sleeve 2. When impurities and condensate enter the groove 22, they can flow out through the notch, thus reducing the possibility of impurities and condensate accumulating in the groove 22. This reduces the impact on the relative movement of the valve stem 1 and the valve sleeve 2, and also reduces the corrosion of the valve sleeve 2 by condensate, making it more in line with actual usage requirements.

[0042] like Figure 2 As shown, in one possible implementation, along the axial direction of the valve sleeve 2, the size of the valve sleeve 2 is a, and the size of the groove 22 is b, and a and b satisfy: 1 / 2a ≤ b ≤ 2 / 3a. The size of the groove 22 can be 0.50a, 0.52a, 0.54a, 0.56a, 0.58a, 0.60a, 0.62a, 0.64a, 0.66a, etc.

[0043] When the length of the groove 22 is less than 1 / 2a, the size of the groove 22 is too small, and after the groove 22 is arranged, the contact area between the valve sleeve 2 and the valve rod 1 is still large, and impurities and condensed water are easy to accumulate between the valve sleeve 2 and the valve rod 1, thereby affecting the relative movement between the valve sleeve 2 and the valve rod 1. When the length of the groove 22 is greater than 2 / 3a, the size of the groove 22 is too large, which leads to that the contact area between the valve sleeve 2 and the valve rod 1 is too small, the guiding effect of the valve sleeve 2 on the valve rod 1 is reduced, and the valve rod 1 is easy to shake during movement, which leads to unstable movement of the valve rod 1 and affects the normal work of the valve body. Therefore, the size of the groove 22 can be 1 / 2a to 2 / 3a, so that the groove 22 can reduce the contact area between the valve rod 1 and the valve sleeve 2 while maintaining the guiding effect of the valve sleeve 2 on the valve rod 1.

[0044] In a possible implementation, the size of the groove 22 can be 5mm to 14mm. The overall size of the valve sleeve 2 can be 10mm to 21mm. In combination with the size of the valve sleeve 2, when the groove 22 is arranged, the size of the groove 22 can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, etc.

[0045] The size of the groove 22 can be set according to the size of the valve sleeve 2 and actual use requirements. When the size of the groove 22 is too small, the contact area between the valve sleeve 2 and the valve rod 1 is large, and impurities and condensed water are easy to accumulate between the valve sleeve 2 and the valve rod 1, thereby affecting the relative movement between the valve rod 1 and the valve sleeve 2, and causing jamming and the like. At the same time, the condensed water and the ions with corrosive properties in the condensed water can cause the valve sleeve 2 to be corroded and rusted. When the size of the groove 22 is too large, the contact area between the valve sleeve 2 and the valve rod 1 is too small, which can lead to shaking of the valve rod 1 during movement and affect the stability of the valve body.

[0046] In a possible implementation, along the radial direction of the valve sleeve 2, the depth of the groove 22 is 0.5mm to 1.5mm, and the depth of the groove 22 can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, etc.

[0047] When the depth of the groove 22 is less than 0.5mm, the depth of the groove 22 is too small, and the space of the groove 22 for storing impurities and condensed water is too small, which can easily lead to accumulation of impurities and condensed water in the groove 22 and contact with the valve rod 1. When the depth of the groove 22 is greater than 1.5mm, the depth of the groove 22 is too deep, which can affect the processing efficiency during processing.

[0048] In one possible implementation, the width of the groove 22 is 0.5 mm to 4 mm, and the width of the groove 22 can be 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, etc.

[0049] When the width of the groove 22 is less than 0.5 mm, the groove 22 is too small. Therefore, in order to reduce the contact area between the valve sleeve 2 and the valve stem 1, more grooves 22 need to be set in the valve sleeve 2, which increases the number of machining steps for the valve sleeve 2 and affects the machining efficiency. When the width of the groove 22 is greater than 4 mm, the groove 22 is too large, which can easily lead to an insufficient contact area between the valve sleeve 2 and the valve stem 1, affecting the stability of the movement of the valve stem 1.

[0050] like Figure 4 As shown, in one possible implementation, the opening 221 of the groove 22 is located on the side of the groove 22 facing the interior of the cavity 21, for communication with the cavity 21. In the projection along the axial direction of the valve body, the sum of the projected dimensions of the openings 221 of each groove 22 is m, and the circumference of the projection of the cavity 21 is n, where 0.2n≤m≤0.5n. The cavity 21 can be a cylindrical cavity 21, and the projection along the axial direction of the valve body can be circular. The projection of the opening 221 is located on the circumference of the projection of the cavity 21, that is, the total width of the groove 22 can account for 20%, 25%, 30%, 35%, 40%, 45%, 50%, etc. of the total circumference of the cavity 21.

[0051] When the size of the opening 221 is too small, the size of the groove 22 is too small, resulting in poor performance in accommodating and discharging impurities and condensate. When the size of the opening 221 is too large, the contact area between the valve stem 1 and the valve sleeve 2 becomes too small, causing the valve stem 1 to wobble during operation and affecting the stability of the valve body.

[0052] In one possible implementation, the number of grooves 22 can be from 2 to 8. The number of grooves 22 can be 2, 3, 4, 5, 6, 7, or 8. The number of grooves 22 can be even, and they are arranged symmetrically.

[0053] When there are fewer than two grooves 22, the contact area between the valve stem 1 and the valve sleeve 2 is large, which may lead to uneven force distribution between the valve stem 1 and the valve sleeve 2. When there are more than eight grooves 22, the excessive number of grooves 22 increases the number of processing steps and affects production efficiency.

[0054] Based on the valve body involved in each of the above embodiments, the application further provides a vehicle, which can include the valve body involved in any of the above embodiments, and the valve body can be applied to an EGR system as an EGR valve. Since the valve body has the above technical effects, the vehicle including the valve body also has corresponding technical effects, which will not be repeated here.

[0055] The valve rod 1 can be a stainless steel cylindrical structure, and the valve sleeve 2 can be a copper alloy hollow cylindrical structure, and a plurality of grooves 22 are arranged inside the valve sleeve 2. The edge positions of the outer circle and the inner circle of the valve sleeve 2 can be chamfered. The grooves 22 have a certain spacing from the upper end of the valve sleeve 2, and the lower end can penetrate the valve sleeve 2. By reserving a part of the area at the upper end, the influence of opening the groove 22 on the sealing performance of the valve sleeve 2 can be reduced, and the exhaust gas can be prevented from entering the upper part of the valve body from the lower part of the valve sleeve 2. The length of the groove 22 is less than the length of the valve sleeve 2, which can reduce the fitting area between the valve rod 1 and the valve sleeve 2 while ensuring the guiding effect of the valve sleeve 2. The cross-sectional shape of the groove 22 can be processed according to the requirements, which can be trapezoidal, arc-shaped, semicircular, etc. Such a design can reduce the total amount of impurities on the fitting surface by reducing the fitting area between the valve sleeve 2 and the valve rod 1, and the groove 22 can also be used to store part of the impurities overflowing from the fitting surface of the valve rod 1 and the valve sleeve 2. Thus, the influence of impurities on the valve rod 1 and the valve sleeve 2 can be reduced, and the probability of the valve rod 1 being stuck can be reduced, thereby the probability of the EGR valve failing to function can be reduced. At the same time, the groove 22 can reduce the weight of the valve sleeve 2. It is more in line with the actual use requirements.

Claims

1. A valve body applied to a vehicle, the valve body comprising: a valve stem (1); a valve sleeve (2) sleeved with the valve stem (1); wherein the valve sleeve (2) comprises a cavity (21) penetrating through the valve sleeve (2) along an axial direction of the valve sleeve (2), at least a part of the valve stem (1) is located in the cavity (21), a side wall of the cavity (21) is provided with at least one groove (22) recessed away from an inside of the cavity (21) and extending along the axial direction of the valve sleeve (2), along the axial direction of the valve sleeve (2), the valve sleeve (2) has a first end (23) and a second end (24), the first end (23) is located above the second end (24), and the groove (22) has a spacing from the first end (23).

2. The valve body of claim 1, wherein The distance between the groove (22) and the first end (23) along the axial direction of the valve sleeve (2) is 5-8 mm.

3. The valve body of claim 1, wherein The groove (22) penetrates through the second end (24) along the axial direction of the valve sleeve (2).

4. The valve body of claim 1, wherein Along the axial direction of the valve sleeve (2), the size of the valve sleeve (2) is a, the size of the groove (22) is b, and 1 / 2a≤b≤2 / 3a.

5. The valve body of claim 4, wherein, The size of the groove (22) along the axial direction of the valve sleeve (2) is 5-14 mm.

6. The valve body of claim 1, wherein The depth of the groove (22) along the radial direction of the valve sleeve (2) is 0.5-1.5 mm.

7. The valve body of claim 1, wherein The width of the groove (22) is 0.5-4 mm.

8. The valve body of claim 1, wherein An opening (221) of the groove (22) is located on a side of the groove (22) facing the inside of the cavity (21) and communicates with the cavity (21), and in a projection along the axial direction of the valve body, the sum of the projection sizes of the opening (221) is m, the projection of the cavity (21) is n, and 0.2n≤m≤0.5n.

9. Valve body according to any of claims 1 to 8, characterized in that The number of the grooves (22) is 2-8.

10. A vehicle characterized by comprising: The vehicle comprises the valve body according to any one of claims 1-9.

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