Metal sealing ring for turbocharger

Abstract

The utility model relates to the technical field of sealing rings, and provides a metal sealing ring for a turbocharger, which comprises an annular body, only one notch is arranged on the annular body, an inner concave part is formed on the end face of the notch opposite to the right side, and an outer convex part matched with the inner concave part is formed on the end face of the notch opposite to the left side. And the inner concave part and the outer concave part are spliced to form a sealing gap.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing rings, and particularly relates to a metal sealing ring for a turbocharger. Background Art

[0002] Turbochargers are currently widely used in automobile engines. Turbochargers can improve power and torque and reduce emissions.

[0003] The function of the metal sealing ring in the turbocharger is to prevent oil from entering other mechanical structures. The existing metal sealing ring structure is as Figure 1 shown. It has a notch. When in use, the ring body needs to be squeezed so that the end faces on both sides of the notch are in contact and form a sealing gap. Under the impact of high-temperature gas or high-temperature oil generated during the operation of the turbocharger, the metal sealing ring of this structure will undergo thermal expansion and contraction, resulting in changes in the size of the sealing gap and prone to axial oil leakage. After long-term use, the oil leakage phenomenon gradually appears;

[0004] Therefore, we propose a metal sealing ring for a turbocharger. Summary of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the utility model provides a metal sealing ring for a turbocharger. By providing an outer convex part and an inner concave part, the sealing gap formed after the two are joined together has at least one turn, that is, the fluidity of the oil is reduced when it moves to the turning point. Under the same working conditions, it can better prevent the flow of oil. By providing a rectangular outer convex part and a rectangular inner concave part, the sealing gap formed by their joining together includes two axials and two radials. The oil needs to make four turns in the sealing gap to leak. Chamfering the edges of the rectangular outer convex part and the rectangular inner concave part can further increase the number of turns of the oil in the sealing gap, and the oil needs to move a longer distance to reach the same height (compared with no inner chamfer).

[0007] (2) Technical Solutions

[0008] To achieve the above object, the utility model is realized through the following technical solutions:

[0009] A metal sealing ring for a turbocharger, characterized in that it includes: a ring-shaped body, and there is only one notch provided on the ring-shaped body. An inner concave part is formed on the end face on the right side relative to the notch, and an outer convex part that cooperates with the inner concave part is formed on the end face on the left side relative to the notch. The inner concave part and the outer concave part are joined together to form a sealing gap.

[0010] Preferably, the concave part and the convex part extend from the radial direction of the annular body to the outer and inner surfaces of the annular body respectively.

[0011] Preferably, the cross-sectional shape of the concave part is a rectangle concave inward, and the cross-sectional shape of the convex part is a rectangle convex outward.

[0012] Preferably, outer chamfers are provided on the upper and lower outer edges of the convex part in the shape of a rectangle, and inner chamfers matching the outer chamfers are provided on the upper and lower inner edges of the concave part in the shape of a rectangle.

[0013] Preferably, the cross-sectional shape of the convex part may also be a semicircle, a triangle, a trapezoid, etc.

[0014] (III) Beneficial effects

[0015] The embodiment of the present utility model provides a metal sealing ring for a turbocharger, which has the following beneficial effects:

[0016] 1. By providing a convex part and a concave part, the sealing gap after the two are combined includes at least one turn, that is, the fluidity of the oil will be reduced when the oil moves to the turning point. Under the same working conditions, it can better prevent the flow of the oil.

[0017] 2. By providing a convex part in the shape of a rectangle and a concave part in the shape of a rectangle, the sealing gap formed by their combination includes two axials and two radials. The oil needs to make four turns in the sealing gap before it can leak. Chamfering the edges of the convex part in the shape of a rectangle and the concave part in the shape of a rectangle can further increase the number of turns of the oil in the sealing gap, and the oil needs to move a longer distance to reach the same height (compared with no inner chamfer). Description of the drawings

[0018] Figure 1 It is a three-dimensional schematic diagram of the prior art structure;

[0019] Figure 2 It is a schematic diagram of the combination of the rectangular concave part and the rectangular convex part of the present utility model;

[0020] Figure 3 For Figure 2 The enlarged schematic diagram of structure A in

[0021] Figure 4 It is a schematic diagram of the combination of the rectangular concave part (with outer chamfer) and the rectangular convex part (with inner chamfer) of the present utility model;

[0022] Figure 5 For Figure 4 The enlarged schematic diagram of structure B in

[0023] Figure 6 It is a schematic diagram of point C;

[0024] Figure 7 This is a three-dimensional schematic diagram of a rectangular outer concave part (with an outer chamfer) and a rectangular inner concave part (with an inner chamfer) of the present utility model.

[0025] In the figure:

[0026] 1. Annular body;

[0027] 2. Notch;

[0028] 3. Outer convex part;

[0029] 4. Inner concave part;

[0030] 5. Outer chamfer;

[0031] 6. Inner chamfer. Specific embodiments

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the scope of protection of the present utility model.

[0033] The existing supercharger seal ring structure is as Figure 1 shown. Its main structure is an annular body 1, and there is only one notch 2 provided on the annular body 1. The end face opposite to the notch 2 on the left side and the end face opposite to the notch 2 on the right side can be mutually attached. After long-term use, some oil in the supercharger will seep into other mechanical structures of the supercharger through the gap formed by the attached surface.

[0034] Referring to the attached Figure 1-7 , a metal seal ring for a turbocharger includes an annular body 1, and there is only one notch 2 provided on the annular body 1. An inner concave part 4 is formed on the end face opposite to the notch 2 on the right side, and an outer convex part 3 that cooperates with the inner concave part 4 is formed on the end face opposite to the notch 2 on the left side. The annular body 1 is extruded to deform it, forcing the inner concave part 4 and the outer convex part 3 to approach and fit with each other. The fitting surface forms a sealing gap. The inner concave part 4 extends from the radial direction (with the annular body 1 as the main body) to the outer and inner surfaces of the annular body 1. It can be understood that the dimension of the inner concave part 4 along the axial direction of the annular body 1 is set not to exceed the dimension between the upper and lower end faces of the annular body 1. Similarly, the outer concave part adopts the same extension direction and dimension as the inner concave part 4.

[0035] The cross-sectional shape of the convex portion 3 can be semicircular, triangular, trapezoidal, etc. The concave portion 4 is designed to cooperate with it. The sealing gap includes at least one turn, which generates resistance to the oil flow and reduces the fluidity of the oil.

[0036] In some embodiments, the cross-sectional shape of the concave portion 4 is a rectangle recessed inward, and the cross-sectional shape of the convex portion 3 is a rectangle protruding outward. The sealing gap includes two axials and two radials. When the oil flows into the sealing gap, it will experience at most four turns, gradually reducing the fluidity of the oil.

[0037] Furthermore, as Figure 5 shown, the upper and lower outer edges of the rectangular convex portion 3 are provided with outer chamfers 5 along the radial direction. Similarly, inner chamfers 6 with the same parameters are provided on the upper and lower inner edges of the rectangular concave portion 4. Such a sealing gap includes two axials, two radials, and two obliques. When the oil flows into the sealing gap, it will experience at most six turns, better reducing the fluidity of the oil. It can be understood that the setting of the chamfers can make the convex portion 3 more easily enter the concave portion 4 for fitting;

[0038] Referring to Figure 6 , compared with the structure without chamfers, the setting of the chamfers enables the oil to move a longer distance at point C of the same height, further buffering the fluidity of the oil.

[0039] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A metal sealing ring for a turbocharger, characterized in that, Comprising: An annular body (1), and there is only one notch (2) provided on the annular body (1). An inner concave portion (4) is formed on the right end face relative to the notch (2), and an outer convex portion (3) that cooperates with the inner concave portion (4) is formed on the left end face relative to the notch (2). A sealing gap is formed by the fitting of the inner concave portion (4) and the outer concave portion; The inner concave portion (4) and the outer concave portion respectively extend from the radial direction of the annular body (1) to the outer and inner surfaces of the annular body (1); The cross-sectional shape of the inner concave portion (4) is a rectangle that is recessed inward, and the cross-sectional shape of the outer convex portion (3) is a rectangle that protrudes outward; Outer chamfers (5) are provided on the upper and lower outer edges of the rectangular outer convex portion (3), and inner chamfers (6) that cooperate with the outer chamfers (5) are provided on the upper and lower inner edges of the rectangular inner concave portion (4).

2. The metal sealing ring for a turbocharger according to claim 1, characterized in that: The cross-sectional shape of the outer convex portion (3) is one of a semicircle, a triangle, or a trapezoid.

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