Turbocharger vent valve

Abstract

The invention provides a turbocharger deflation valve which comprises an execution rod, the execution rod penetrates through a center hole of a valve body and then is fixedly connected with a valve cover, the valve cover is in compression connection with a deflation hole of a turbine box, the valve body is fixed to a deflation valve seat hole of the turbine box, a compression spring is installed in the valve body, and the compression spring is connected with the execution rod in a sleeved mode. A gap is formed between the thrust acting disc and the valve body in the axial direction, the valve bonnet is installed at the upper end of the valve body, the compression spring is compressed in the valve body through the valve bonnet, and when the turbine inlet pressure reaches a set value, the valve deck pushes the execution rod to move upwards to compress the compression spring so that the valve deck can be opened. According to the turbocharger deflation valve, air does not need to be guided from the air compressor end for control, the turbocharger deflation valve is directly installed on a turbine box, the structure is simple and compact, meanwhile, the deflation valve is not provided with a diaphragm, and the high temperature resistance and vibration resistance of the deflation valve are superior to those of a deflation valve of a traditional structure.

Description

Technical Field

[0001] The present invention belongs to the technical field of turbochargers, and particularly relates to a wastegate valve for a turbocharger. Background Art

[0002] The exhaust gas turbocharging system is a widely used supercharging method for vehicle engines at present. The supercharger in this system consists of two parts: an exhaust gas turbine and a compressor, which is called an exhaust gas turbocharger. The turbocharger uses the exhaust gas discharged from the engine to drive the turbine, and the turbine drives the coaxial compressor impeller to rotate. The impeller compresses the air sent from the air filter pipeline, increases its pressure and density, and then enters the cylinder. The increased air volume and more complete fuel combustion increase the calorific value, thereby improving the output power and torque of the engine. However, the working speed range of vehicle engines is large, and it is difficult to achieve full-condition matching between the supercharger and the engine. To obtain good low-speed torque characteristics, the supercharger needs to be matched with the engine at low speeds. However, when the engine is running at high speeds, the supercharger has an overspeed problem. Therefore, a wastegate valve is provided on the turbocharger to relieve pressure through the wastegate valve to solve the above problems.

[0003] The existing wastegate valve structure of turbochargers on the market consists of an actuator, a control air pipe, a bracket, a crank, an eccentric high-temperature valve assembly, etc. The control air pipe connects the compressor outlet with the actuator. When the pressure after the compressor reaches the set value, the compressed air at the compressor outlet drives the actuator to move. The actuator pushes the crank, and the crank drives the eccentric high-temperature valve to open, thereby discharging the high-temperature gas at the turbine inlet to the turbine outlet. However, this actuator structure is complex and large, making it difficult to arrange compactly. Summary of the Invention

[0004] In view of this, the present invention aims to provide a wastegate valve for a turbocharger to solve the problem of compact arrangement of turbochargers with wastegate valves.

[0005] To achieve the above object, the technical solution of the present invention is realized as follows: A wastegate valve for a turbocharger includes an actuating rod. The actuating rod passes through the central hole of the valve body and is fixedly connected to the valve cover. The valve cover is tightly connected to the exhaust hole of the turbine housing. The valve body is fixed on the wastegate valve seat hole of the turbine housing. A compression spring is installed inside the valve body. The compression spring is sleeved on the actuating rod, and the lower end presses on the thrust acting disc of the actuating rod. There is a gap between the thrust acting disc and the valve body along the axial direction. A valve cap is installed at the upper end of the valve body, and the valve cap presses the compression spring tightly inside the valve body. When the pressure at the turbine inlet reaches the set value, the valve cover pushes the actuating rod to move upward, compressing the compression spring to open the valve cover.

[0006] Further, an exhaust hole is provided at the air inlet of the turbine housing. An exhaust cavity communicating with the turbine housing outlet is provided above the exhaust hole. A wastegate valve seat hole for installing the valve body is provided above the exhaust hole.

[0007] Further, a valve disc positioning platform is provided at the lower end of the actuating rod, a thrust acting disc is provided in the middle of the actuating rod, and a plurality of pressure relief holes are provided on the thrust acting disc.

[0008] Further, the valve body is integrally cylindrical. An installation thread and a positioning step are provided at the lower end of the valve body. An actuating rod positioning hole is provided in the middle of the bottom of the valve body for installing the actuating rod. The upper end of the valve body is cylindrical for installing the thrust acting disc and the compression spring of the actuating rod. Heat dissipation holes are provided on the side of the valve body for dissipating heat from the compression spring. A valve cap installation thread is provided on the outer side of the upper end of the valve body for installing the valve cap.

[0009] Further, the valve cap is integrally cap-shaped. An installation thread is provided on the inner side of the lower end of the valve cap for connecting the valve body and fixing the compression spring. A hexagonal platform is provided at the center of the top of the valve cap for fastening the components of the air release valve. An actuating rod guiding hole is provided at the center of the valve cap for guiding the actuating rod to move in a straight line. An actuating rod limiting bolt hole is provided at the center of the top of the valve cap for installing the limiting bolt of the actuating rod.

[0010] Further, the limiting bolt is installed in the actuating rod limiting bolt hole at the top of the valve cap, and a locking nut is provided at the upper end of the limiting bolt.

[0011] Compared with the prior art, the air release valve of the turbocharger of the present invention has the following advantages: (1) For the air release valve of the turbocharger of the present invention, the compactness of the air release valve adjusting mechanism is improved, and the problem of compact layout of the turbocharger with an air release valve is solved.

[0012] (2) For the air release valve of the turbocharger of the present invention, there is no need to draw air from the compressor end for control. It is directly installed on the turbine housing, with a simple and compact structure. At the same time, this air release valve has no diaphragm, and its high temperature resistance and vibration resistance are superior to those of the traditional structure air release valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings: Figure 1 is a cross-sectional view of the air release valve of the turbocharger according to the embodiment of the present invention; Figure 2 is a schematic structural view of the turbine housing according to the embodiment of the present invention; Figure 3 is a schematic view of the actuating rod according to the embodiment of the present invention; Figure 4 is a top view of the actuating rod according to the embodiment of the present invention; Figure 5Schematic diagram of the valve body according to the embodiment of the present invention; Figure 6 Schematic diagram of the valve cap according to the embodiment of the present invention.

[0014] Explanation of reference numerals: 1. Turbine box; 1a. Air vent hole; 1b. Air vent cavity; 1c. Air vent valve seat hole; 2. Valve cover; 3. Actuating rod; 3a. Valve plate positioning platform; 3b. Thrust acting disk; 3c. Pressure relief hole; 4. Valve body; 4a. Mounting thread; 4b. Positioning step; 4c. Actuating rod positioning hole; 4d. Compression spring positioning hole; 4e. Heat dissipation hole; 4f. Valve cap mounting thread; 5. Compression spring; 6. Valve cap; 6a. Mounting thread; 6b. Hexagonal platform; 6c. Actuating rod guiding hole; 6d. Actuating rod limiting bolt hole; 7. Limiting bolt; 8. Locking nut. Detailed implementation manners

[0015] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0016] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "mount", "connect", "couple" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0018] The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0019] A turbine supercharger air vent valve, asFigures 1 to 6 As shown in the figure, it includes a turbine box 1, a valve cover 2, an actuator rod 3, a valve body 4, a compression spring 5, a valve cap 6, a limit bolt 7 and a locking nut 8. The actuator rod 3 passes through the central hole of the valve body 4 and is fixedly connected to the valve cover 2. The valve cover 2 is tightly connected to the air vent 1a of the turbine box 1. The valve body 4 is fixed on the air release valve seat hole 1c of the turbine box 1 through the installation thread 4a. A compression spring 5 is installed inside the valve body 4. The compression spring 5 is sleeved on the actuator rod 3, and the lower end presses on the thrust action disk 3b of the actuator rod 3. There is a gap between the thrust action disk 3b of the actuator 3 and the valve body 4 in the axial direction to ensure that the valve cover 2 is tightly pressed against the air vent 1a of the turbine box 1. The valve cap 6 is installed at the upper end of the valve body 4 (thread), and the valve cap 6 presses the compression spring 5 tightly inside the valve body 4. When the turbine inlet pressure reaches the set value, the valve cover 2 pushes the actuator rod 3 to move upward to compress the compression spring 5, so that the valve cover 2 is opened, thereby realizing the purpose that the turbine inlet gas directly flows to the turbine outlet.

[0020] The turbine box 1 is provided with an air vent 1a at the air inlet, an air release chamber 1b is arranged above the air vent 1a, the air release chamber 1b is communicated with the turbine box outlet, and an air release valve seat hole 1c for installing the valve body 4 is arranged above the air vent.

[0021] The lower end of the actuator rod 3 is provided with a valve piece positioning platform 3a, and a thrust action disk 3b is arranged in the middle of the actuator rod 3 for bearing the pressure of the compression spring 5. A number of pressure relief holes 3c are arranged on the thrust action disk.

[0022] The valve body 4 is integrally cylindrical. An installation thread 4a and a positioning step 4b are arranged at the lower end of the valve body 4. An actuator rod positioning hole 4c is arranged in the middle of the bottom of the valve body 4 for installing the actuator rod 3. The upper end of the valve body 4 is cylindrical for installing the thrust action disk 3b and the compression spring 5 of the actuator rod 3. A heat dissipation hole 4e is arranged on the side of the valve body 4 for dissipating heat from the compression spring 5. A valve cap installation thread 4f is arranged on the outer side of the upper end of the valve body 4 for installing the valve cap 6.

[0023] The valve cap 6 is integrally cap-shaped. An installation thread 6a is arranged on the inner side of the lower end of the valve cap 6 for connecting the valve body 4 and fixing the compression spring 5. A hexagonal platform 6b is arranged at the center position of the top end of the valve cap 6 for fastening each component of the air release valve. An actuator rod guiding hole 6c is arranged at the center position of the valve cap 6 for guiding the actuator rod 3 to move in a straight line. An actuator rod limit bolt hole 6d is arranged at the center position of the top end of the valve cap 6 for installing the limit bolt 7 of the actuator rod 3.

[0024] The limit bolt 7 is installed in the actuator rod limit bolt hole 6d at the top end of the valve cap 6, and a locking nut 8 is arranged at the upper end of the limit bolt 7 for fixing the limit bolt 7.

[0025] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A turbocharger bleed valve, characterized in that: The cam is pressed against the vent hole of the turbine box, and the valve cover is pressed against the vent hole of the turbine box. The valve body is fixed on the vent valve seat hole of the turbine box. A compression spring is installed inside the valve body. The compression spring is sleeved with the actuator rod, and the lower end is pressed against the thrust action disk of the actuator rod. A gap is provided axially between the thrust action disk and the valve body. A valve cap is installed on the upper end of the valve body, and the valve cap presses the compression spring against the valve body. When the turbine inlet pressure reaches the set value, the valve cover pushes the actuator rod to move upward to compress the compression spring and open the valve cover.

2. A turbocharger bleed valve according to claim 1, characterized in that: An air vent hole is arranged at the air inlet of the turbine box, an air vent cavity connected with the outlet of the turbine box is arranged above the air vent hole, and an air vent valve seat hole for installing the valve body is arranged above the air vent hole.

3. A turbocharger bleed valve according to claim 1, characterized in that: A valve plate positioning platform is arranged at the lower end of the actuator rod, a thrust acting disc is arranged in the middle of the actuator rod, and a plurality of pressure relief holes are arranged on the thrust acting disc.

4. A turbocharger bleed valve according to claim 1, characterized in that: The valve body is cylindrical as a whole, with mounting threads and positioning steps at the lower end of the valve body. An actuator rod positioning hole is provided in the middle of the bottom of the valve body for installing the actuator rod. The upper end of the valve body is cylindrical for installing the thrust action disk and compression spring of the actuator rod. Heat dissipation holes are provided on the side of the valve body for dissipating heat to the compression spring. A valve cap mounting thread is provided on the outer side of the upper end of the valve body for installing the valve cap.

5. The turbocharger bleed valve according to claim 1, characterized in that: The valve bonnet is in the shape of a hat as a whole, and an installation thread is provided on the inner side of the lower end of the valve bonnet, which is used to connect the valve body and fix the compression spring. A hexagonal platform is provided at the center of the top of the valve bonnet, which is used to fasten the various components of the air release valve. An actuator rod guide hole is provided at the center of the valve bonnet, which is used to guide the actuator rod to move in a straight line. An actuator rod limit bolt hole is provided at the center of the top of the valve bonnet, which is used to install the limit bolt of the actuator rod.

6. A turbocharger bleed valve according to claim 5, characterized in that: The limit bolt is installed in the limit bolt hole of the actuator rod at the top end of the valve cap, and a locking nut is arranged on the upper end of the limit bolt.

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