Bypass valve structure in diesel engine turbocharger

Abstract

A bypass valve structure in a diesel engine turbocharger comprises a driver arranged on the turbocharger, the driver is connected to a driving swing arm through a connecting rod, the driving swing arm is connected to a rotating shaft, a bypass valve is arranged at the end of the rotating shaft, and when the rotating shaft rotates, the bypass valve can be driven to move to achieve opening and closing. One end of the rotating shaft extends out of an integrally formed mounting plate, and a mounting hole for mounting the bypass valve is formed in the mounting plate; an integrally-formed installation protruding shaft extends out of the bypass valve and is assembled in the installation hole, and a clamping ring used for assembling and limiting is arranged at the end, away from the valve face, of the installation protruding shaft. And an elastic ring sheet is arranged between the clamping ring and the end face of the mounting hole. According to the bypass valve structure in the diesel engine turbocharger, the rotating shaft and the mounting plate on the rotating shaft are of an integrally-formed structure, the strength is high, meanwhile, the bypass valve and the mounting convex shaft on the bypass valve are of an integrally-formed structure, the strength is high, and assembling is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of the structure of diesel engine turbochargers, and particularly relates to a bypass valve structure in a diesel engine turbocharger. Background Art

[0002] Turbochargers on vehicles supply more air to the engine, thereby improving combustion efficiency and generating stronger power. Currently, both gasoline engines and diesel engines can use turbochargers to improve the combustion efficiency of the engines.

[0003] In the turbine component of a diesel engine turbocharger, the bypass valve is a key component, and its main function is to regulate the boost pressure and protect the turbocharger. For example: at low speeds, the pressure at the compressor outlet is low, the bypass valve is closed, and all the exhaust gas passes through the turbine end, increasing the turbine speed and intake boost pressure. When operating at high speeds, the bypass valve is opened, and part of the exhaust gas is directly discharged without passing through the turbine, reducing the turbine speed and boost pressure.

[0004] Therefore, the structure of the bypass valve needs to be stable, with high responsiveness and good sealing effect when closed. Based on this, this application further studies and improves the bypass valve structure in a diesel engine turbocharger. Content of the Utility Model

[0005] Aiming at the above deficiencies in the prior art, the utility model provides a bypass valve structure in a diesel engine turbocharger, with high structural strength, good sealing performance and convenient assembly of the valve body.

[0006] The utility model is solved by the following technical solutions.

[0007] A bypass valve structure in a diesel engine turbocharger includes a driver provided on the turbocharger. The driver is connected to a driving swing arm through a connecting rod. The driving swing arm is connected to a rotating shaft. A bypass valve is provided at the end of the rotating shaft. When the rotating shaft rotates, it can drive the movement of the bypass valve to achieve opening and closing. One end of the rotating shaft extends out an integrally formed mounting plate, and mounting holes for mounting the bypass valve are provided on the mounting plate. An integrally formed mounting convex shaft extends out from the bypass valve. The mounting convex shaft is assembled in the mounting hole, and a snap ring for assembly and limiting is provided at one end of the mounting convex shaft away from the valve surface. An elastic ring piece is provided between the snap ring and the end face of the mounting hole.

[0008] In the bypass valve structure of the diesel engine turbocharger in the present application, the rotating shaft and the mounting plate thereon are of an integrally formed structure, with high strength. At the same time, the bypass valve and the mounting convex shaft thereon are also of an integrally formed structure, with high strength, and other assembly processes are also reduced. The structure is simple and the assembly is convenient. After assembly, through the setting of the snap ring and the elastic ring piece, while ensuring that the bypass valve has an axial movement elastic force, a good elastic pre-tightening force can also be provided to avoid loosening of the bypass valve in the axial direction and ensure good sealing effect of the bypass valve.

[0009] In a preferred embodiment, the end face is in an annular sunken cavity, and part of the elastic ring piece is placed in the sunken cavity. The assembly structure is compact and not easily disengaged.

[0010] In a preferred embodiment, the side of the bypass valve facing away from the valve face is the valve back face, and a protruding stopper is provided on the valve back face. The two ends of the stopper can respectively abut against two abutting surfaces on the side surface of the mounting plate to define the amplitude of the axial rotation of the bypass valve. Specifically, when one end of the stopper abuts against one side of the abutting surface, the distance between the other end of the stopper and the abutting surface on the other side is less than 1 mm, so as to minimize the amplitude of the axial rotation of the bypass valve as much as possible, but some gaps are also reserved to allow necessary axial rotation and ensure high stability when the bypass valve is working.

[0011] In a preferred embodiment, the stopper is a protruding arc-shaped plate, which matches the arc-shaped side surface of the mounting plate.

[0012] In a preferred embodiment, a bushing is provided outside the rotating shaft for assembly.

[0013] Compared with the prior art, the present utility model has the following beneficial effects: A bypass valve structure in a diesel engine turbocharger is provided, and the structure of the valve body has high strength, good sealing performance, and convenient assembly. Description of the Drawings

[0014] Figure 1 It is a three-dimensional view of a turbocharger in the present utility model.

[0015] Figure 2 It is a schematic diagram of a bypass valve drive assembly in the turbocharger.

[0016] Figure 3 It is a three-dimensional view of the bypass valve and rotating shaft structure in the present utility model.

[0017] Figure 4 It is a cross-sectional view of the bypass valve and rotating shaft structure in the present utility model.

[0018] Figure 5 It is a cross-sectional view of the bypass valve assembly in the present utility model.

[0019] Figure 6 This is a three-dimensional view of the rotating shaft in the present utility model.

[0020] Figure 7 This is a three-dimensional Figure 1 .

[0021] Figure 8 This is a three-dimensional Figure 2 . Specific Embodiments

[0022] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] In the following embodiments, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0024] In the description of the present utility model, it should be understood that the terms: center, longitudinal, transverse, length, width, thickness, upper, lower, front, rear, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, counterclockwise, etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and thus should not be construed as a limitation of the present utility model. In addition, the terms: first, second, etc. are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present utility model, unless otherwise clearly defined and limited, the terms: installation, connection, etc. should be understood in a broad sense, and those of ordinary skill in the art can understand the specific meanings of the above terms in the present application according to specific circumstances.

[0025] Refer to Figures 1 to 8 , a bypass valve structure in a diesel engine turbocharger involved in the present utility model includes a driver 4 provided on the turbocharger 1. The driver 4 is connected to a driving swing arm 51 through a connecting rod 5. The driving swing arm 51 is connected to a rotating shaft 64. A bushing 6 is provided outside the rotating shaft 64 for assembly. A bypass valve 7 is provided at the end of the rotating shaft 64. When the rotating shaft 64 rotates, it can drive the movement of the bypass valve 7 to achieve opening and closing. One end of the rotating shaft 64 extends out an integrally formed mounting plate 65. Mounting holes 66 for mounting the bypass valve 7 are provided on the mounting plate 65. An integrally formed mounting convex shaft 72 extends out from the bypass valve 7. The mounting convex shaft 72 is assembled in the mounting hole 66, and a snap ring 74 for assembly and limit is provided at one end of the mounting convex shaft 72 away from the valve surface 79. An elastic ring piece 73 is provided between the snap ring 74 and the end face 661 of the mounting hole 66.

[0026] Specifically, in one embodiment of the present application, the end face 661 is located in an annular sunken cavity, and a part of the elastic ring piece 73 is placed in the sunken cavity. The assembly structure is compact and not easily disengaged.

[0027] In the present application, from the attached Figure 7 and the attached Figure 8 It can be seen that the side of the bypass valve 7 facing away from the valve face 79 is the valve back face. A protruding stopper 71 is provided on the valve back face. The two ends of the stopper 71 can respectively abut against two abutting faces 651 on the side surface of the mounting plate 65 to define the axial rotation amplitude of the bypass valve 7. Specifically, when one end of the stopper 71 abuts against one side of the abutting face 651, the distance between the other end of the stopper 71 and the abutting face 651 on the other side is less than 1 mm, so as to minimize the axial rotation amplitude of the bypass valve 7, but also leave some gaps to allow necessary axial rotation and ensure high stability when the bypass valve works. The stopper 71 is a protruding arc-shaped plate and matches the arc-shaped side surface of the mounting plate 65.

[0028] As can be seen from the above description, in the diesel engine turbocharger 1 of the present application, there is a bypass valve drive assembly, and the bypass valve 7 is arranged in the exhaust gas cavity 13 at the turbine end. In this bypass valve structure, the rotating shaft 64 and the mounting plate 65 thereon are integrally formed structures with high strength. At the same time, the bypass valve 7 and the mounting convex shaft 72 thereon are also integrally formed structures with high strength, which also reduces other assembly processes. The structure is simple and the assembly is convenient. After assembly, through the setting of the snap ring 74 and the elastic ring piece 73, while ensuring that the bypass valve 7 has an axial moving elastic force, it can also provide a good elastic preloading force to avoid loosening of the bypass valve 7 in the axial direction and ensure good sealing effect of the bypass valve 7.

[0029] As described above, the present utility model provides a bypass valve structure in a diesel engine turbocharger, with high structural strength of the valve body, good sealing performance, and convenient assembly.

[0030] The protection scope of the present utility model includes but is not limited to the above embodiments. The protection scope of the present utility model is subject to the claims. Any substitutions, deformations, and improvements that are easily conceivable by those skilled in the art to this technology fall within the protection scope of the present utility model.

Claims

1. A bypass valve structure in a diesel engine turbocharger, comprising a driver (4) provided on the turbocharger (1), the driver (4) is connected to a driving swing arm (51) through a connecting rod (5), the driving swing arm (51) is connected to a rotating shaft (64), and a bypass valve (7) is provided at the end of the rotating shaft (64). When the rotating shaft (64) rotates, it can drive the movement of the bypass valve (7) to achieve opening and closing; Characterized in that: One end of the rotating shaft (64) extends out an integrally formed mounting plate (65), and a mounting hole (66) for mounting the bypass valve (7) is provided on the mounting plate (65); An integrally formed mounting convex shaft (72) protrudes from the bypass valve (7), the mounting convex shaft (72) is assembled in the mounting hole (66), and a snap ring (74) for assembly and limit is provided at one end of the mounting convex shaft (72) away from the valve surface (79); An elastic ring piece (73) is provided between the snap ring (74) and the end face (661) of the mounting hole (66).

2. The bypass valve structure in a diesel engine turbocharger according to claim 1, characterized in that, The end face (661) is located in an annular sinking cavity, and a part of the elastic ring piece (73) is placed in the sinking cavity.

3. The bypass valve structure in a diesel engine turbocharger according to claim 1, characterized in that, One side of the bypass valve (7) facing away from the valve surface (79) is the valve back surface, and a protruding stopper (71) is provided on the valve back surface. The two ends of the stopper (71) can respectively abut against two abutting surfaces (651) on the side surface of the mounting plate (65) to define the axial rotation amplitude of the bypass valve (7).

4. The bypass valve structure in a diesel engine turbocharger according to claim 3, characterized in that, The stopper (71) is a protruding arc-shaped plate.

5. A bypass valve structure in a diesel engine turbocharger according to any one of claims 1 to 4, characterized in that, A bushing (6) is provided outside the rotating shaft (64).

Images