Ball cone flat valve cover structure for bypass valve

Abstract

The utility model discloses a ball cone flat valve cover structure for a bypass valve, and relates to the technical field of turbochargers, the ball cone flat valve cover structure comprises a bent shaft, a valve cover and a matching structure, and the matching structure comprises a first matching surface and a second matching surface; according to the bent shaft and the flat valve cover which are matched through the first matching surface and the second matching surface, the part structure is simplified, self-adaptive accurate matching of the valve cover and the volute mounting matching surface is achieved, the product stability is improved, and the service life of the product is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of turbochargers, and in particular to a spherical cone flat valve cover structure for a bypass valve. Background Art

[0002] As an important component of high-end automobile engines, the main function of a turbocharger is to increase the intake density of automobile engines, make the fuel combustion of gasoline engines more complete, and increase the driving force of the engine. The most common type of turbocharger is an exhaust gas bypass turbocharger, which uses the high-temperature combustion gas discharged by the engine to drive the turbine of the turbocharger, thereby driving the compressor of the turbocharger to work. Since the amount of exhaust gas discharged by automobile engines at different speeds is different, the required intake volume is also different. This type of turbocharger is generally equipped with an exhaust gas bypass valve in the volute flow channel, which can control the amount of exhaust gas entering the turbine.

[0003] like Figure 1-4 As shown in the figure, the common bypass valve structure is a flat valve cover structure, and a matching plane is processed on the corresponding volute. The flat valve cover bypass valve structure includes a rocker arm, a flat valve cover, a gasket and a spring. The flat valve cover passes through the mounting hole on the rocker arm, and after the spring and gasket are installed, they are welded into a whole. The flat valve cover bypass valve is assembled into the pin hole of the flat valve cover volute. When working, the flat valve cover bypass valve can rotate around the pin hole to realize the opening and closing angle of the matching surface between the flat valve cover and the volute.

[0004] This structure uses face sealing. Considering the processing and assembly errors, when the actual valve cover and volute are matched, there is a certain deviation between the valve cover axis and the volute exhaust hole axis. Therefore, it is necessary to reserve a certain matching clearance between the rocker arm and the gasket to compensate for the axis deviation. Due to the large matching clearance, the flat valve cover will generate noise during repeated rotation. Therefore, it is necessary to add a spring between the rocker arm and the gasket to turn the free clearance into a damping clearance to reduce impact and reduce noise. This structure has many combined parts, complex processing, and poor matching accuracy. When assembled into a volute subassembly for air tightness testing, the leakage control effect is not ideal. Utility Model Content

[0005] The purpose of the present invention is to design a ball cone flat valve cover structure for a bypass valve in order to solve the above problems.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] A spherical cone flat valve cover structure for a bypass valve comprises a bent shaft, a valve cover and a matching structure, wherein the matching structure is used for matching between the matching hole of the bent shaft and the valve cover, and the matching structure comprises a first matching surface and a second matching surface, wherein the first matching surface is arranged on the inner side wall of the matching hole, and the second matching surface is arranged at the connection between the valve cover and the rotating shaft, the distance between an end of the first matching surface close to the valve cover and the central axis of the matching hole is a first distance, the distance between an end of the first matching surface away from the valve cover and the central axis of the matching hole is a second distance, the first distance is greater than the second distance, the distance between an end of the second matching surface close to the matching hole of the bent shaft and the central axis of the rotating shaft is a third distance, the distance between an end of the second matching surface away from the matching hole of the bent shaft and the central axis of the rotating shaft is a fourth distance, the third distance is less than the fourth distance, and the first matching surface is in extrusion contact with the second matching surface.

[0008] The beneficial effects of the present invention are as follows: the bent shaft and the flat valve cover that are matched with the first matching surface and the second matching surface designed by the present invention simplify the component structure, achieve adaptive and precise matching of the valve cover and the volute mounting matching surface, improve product stability and service life, and reduce NVH noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of a flat valve cover structure commonly used in the background technology;

[0010] Figure 2 It is a schematic diagram of a flat valve cover assembly structure commonly used in the background technology;

[0011] Figure 3 It is a schematic diagram of the flat valve cover structure in the background technology under ideal conditions;

[0012] Figure 4 It is a schematic diagram of the actual matching of the flat valve cover structure in the background technology;

[0013] Figure 5 It is a structural schematic diagram of a spherical cone flat valve cover structure for a bypass valve of the present invention;

[0014] Figure 6 It is a schematic diagram of the assembly of the ball cone flat valve cover structure for the bypass valve of the present invention;

[0015] Figure 7 It is a structural schematic diagram of the first mating surface in the ball cone flat valve cover structure for a bypass valve of the present invention;

[0016] Figure 8 It is a structural schematic diagram of the second matching surface in the ball cone flat valve cover structure for a bypass valve of the present invention;

[0017] Fig. 9 It is a schematic diagram of the actual matching of the ball cone flat valve cover structure for the bypass valve of the present invention;

[0018] The corresponding figures are:

[0019] 1- rocker arm, 2- flat valve cover, 3- gasket, 4- spring sheet, 5- volute casing, 6- bypass valve assembly, 7- bent shaft, 8- valve cover, 9- first mating surface, 10- second mating surface. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms such as "setting" and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] like Figure 5-Figure 9 As shown, a spherical cone flat valve cover structure for a bypass valve includes a bent shaft 7, a valve cover 8 and a matching structure, wherein the matching structure is used for matching between the matching hole of the bent shaft 7 and the valve cover 8, and the matching structure includes a first matching surface 9 and a second matching surface 10, wherein the first matching surface 9 is arranged on the inner side wall of the matching hole, and the second matching surface 10 is arranged at the connection between the valve cover 8 and the rotating shaft, the distance between the end of the first matching surface 9 close to the valve cover 8 and the central axis of the matching hole is a first distance, the distance between the end of the first matching surface 9 away from the valve cover 8 and the central axis of the matching hole is a second distance, the first distance is greater than the second distance, the distance between the end of the second matching surface 10 close to the matching hole of the bent shaft 7 and the central axis of the rotating shaft is a third distance, the distance between the end of the second matching surface 10 away from the matching hole of the bent shaft 7 and the central axis of the rotating shaft is a fourth distance, the third distance is less than the fourth distance, and the first matching surface 9 is in extrusion contact with the second matching surface 10.

[0028] The matching hole of the bending shaft 7 is fixedly connected to the rotating shaft by welding.

[0029] The mounting mating surface between the valve cover 8 and the volute 5 of the turbocharger is a plane.

[0030] The first mating surface 9 is a conical structure, and the second mating surface 10 is a spherical structure.

[0031] The first mating surface 9 is a spherical structure, and the second mating surface 10 is a conical structure.

[0032] Through the ball-cone fit and the shaft-hole clearance fit, the plane and axis deviations generated during the processing of the volute 5 can be adaptively compensated to improve the fit accuracy. After adaptive compensation, the flat valve cover 8 and the valve hole of the volute 5 are sealed through the surface. Compared with the traditional line sealing method of the cone valve cover 8, the sealing effect is better; and the adaptive compensation replaces the compensation of the spring, which simplifies the number of components and reduces the production cost of the components.

[0033] Real-time positioning compensation is performed according to the specific vortex casing 5 samples to ensure that all samples are matched with better precision and reduce NVH noise.

[0034] The matching hole of the bent shaft 7 is connected to the rotating shaft by welding, which reduces friction and wear between components and improves the reliability and service life of the product.

[0035] In the present invention, the bent shaft 7 is cast into a blank by a mold, and then the conical plane is machined by machining. The valve cover 8 is forged and then the spherical surface is machined by machining. The conical valve cover 8 passes through the through hole on the bent shaft 7 and is initially movably connected with it, and is welded into a whole after being positioned at the actual position.

[0036] The bent shaft 7 and the flat valve cover 8 with ball-cone matching and the corresponding installation and processing methods are adopted to simplify the component structure, realize the adaptive and precise matching of the valve cover 8 and the valve hole surface of the volute 5, improve the product stability and service life; solve the problems of complex processing, poor matching accuracy and high production cost of the existing flat valve cover 8 bypass valve assembly.

[0037] The technical solution of the present invention is not limited to the above-mentioned specific embodiments. All technical variations made according to the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. The ball cone flat valve cover structure for bypass valve is characterized by: It includes a bending shaft, a valve cover and a matching structure, wherein the matching structure is used for matching between the matching hole of the bending shaft and the valve cover, and the matching structure includes a first matching surface and a second matching surface, the first matching surface is arranged on the inner wall of the matching hole, and the second matching surface is arranged at the connection between the valve cover and the rotating shaft, the distance between the end of the first matching surface close to the valve cover and the central axis of the matching hole is a first distance, the distance between the end of the first matching surface away from the valve cover and the central axis of the matching hole is a second distance, the first distance is greater than the second distance, the distance between the end of the second matching surface close to the matching hole of the bending shaft and the central axis of the rotating shaft is a third distance, the distance between the end of the second matching surface away from the matching hole of the bending shaft and the central axis of the rotating shaft is a fourth distance, the third distance is less than the fourth distance, and the first matching surface is in extrusion contact with the second matching surface.

2. The ball cone flat valve cover structure for a bypass valve according to claim 1, characterized in that: The matching hole of the bending shaft is fixedly connected with the rotating shaft by welding.

3. The ball cone flat valve cover structure for a bypass valve according to claim 1, characterized in that: The mounting mating surface between the valve cover and the volute of the turbocharger is a flat surface.

4. The ball cone flat valve cover structure for a bypass valve according to any one of claims 1 to 3, characterized in that: The first matching surface is a conical structure, and the second matching surface is a spherical structure.

5. The ball cone flat valve cover structure for a bypass valve according to any one of claims 1 to 3, characterized in that: The first matching surface is a spherical structure, and the second matching surface is a conical structure.

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