Turbocharger driving disc, supercharger and vehicle

Abstract

The turbocharger driving disc comprises a base disc and a driving structure, the base disc is made of SUH409 materials, the driving structure is made of stainless steel materials, the surface of the driving structure adopts a nitriding process, the whole driving structure is of an annular structure, and the surface of the driving structure is provided with a plurality of grooves. The center line of the driving structure coincides with the rotating axis of the base disc, the driving structure is fixedly connected with the outer edge of one side of the axis of the base disc, and the driving structure is assembled on the base disc in a low-temperature tool mode. The SUH409 material has good high temperature resistance, and the possibility of displacement of the driving structure relative to the base disc at high temperature can be reduced through close fit after low-temperature tooling assembly, so that compared with a turbocharger driving disc in the prior art, the turbocharger driving disc disclosed by the embodiment of the utility model can reduce the risk of high-temperature warping of the turbocharger driving disc.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle engineering field, especially a kind of turbocharger driving disc, supercharger and vehicle. BACKGROUND

[0002] In the current mainstream design idea of reducing fuel consumption, variable cross-section turbocharger gradually becomes mainstream in engine design.In prior art, during the use of variable cross-section turbocharger, the temperature of parts is relatively high, which can easily cause high-temperature warping of driving disc. UTILITY MODEL CONTENTS

[0003] The utility model embodiment is to provide a kind of turbocharger driving disc, to solve the problem that the temperature of parts is relatively high during the use of variable cross-section turbocharger, which can easily cause high-temperature warping of driving disc.

[0004] In order to achieve the above purpose, the utility model embodiment provides a kind of turbocharger driving disc, comprising: base disc and driving structure, wherein the base disc is made of SUH409 material, the driving structure is made of stainless steel material, the surface of the driving structure is treated by nitriding process, the driving structure is in the form of annular structure as a whole, the center line of the driving structure coincides with the rotation axis of base disc, the driving structure is fixedly connected with the outer edge of one side of the shaft center of the base disc, and the driving structure is assembled on the base disc by low-temperature tooling.

[0005] The utility model embodiment further provides a kind of supercharger, and the supercharger comprises the turbocharger driving disc provided by the utility model embodiment.

[0006] The utility model embodiment further provides a kind of vehicle, and the vehicle comprises the supercharger provided by the utility model embodiment.

[0007] One of the above technical solutions has the following advantages or beneficial effects:

[0008] The utility model discloses an embodiment of turbine supercharger drive disc, including base disc and drive structure, wherein, the base disc adopts SUH409 material, the drive structure adopts stainless steel material, the drive structure surface adopts nitriding process, the drive structure whole is annular structure, the center line of drive structure coincides with the rotation axis of base disc, the drive structure with base disc axle core one side's outer edge fixed connection, the drive structure is assembled to the base disc through the mode of cryogenic tooling. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is a structure schematic diagram of turbine supercharger drive disc provided by the utility model embodiment.

[0010] Figure 2 It is another structure schematic diagram of turbine supercharger drive disc provided by the utility model embodiment. DETAILED DESCRIPTION

[0011] In order to make the technical problem, technical scheme and advantage that the utility model wants to solve more clear, below will combine the drawing and specific embodiment and carry out the detailed description.

[0012] As Figure 1 The utility model embodiment provides a structure schematic diagram of turbine supercharger drive disc, as Figure 1 Shown, including: base disc 1 and drive structure 2, wherein, the base disc 1 adopts SUH409 material, the drive structure 2 adopts stainless steel material, the drive structure 2 surface adopts nitriding process, the drive structure 2 whole is annular structure, the center line of drive structure 2 coincides with the rotation axis of base disc 1, the drive structure 2 with base disc 1 axle core one side's outer edge fixed connection, the drive structure 2 is assembled to the base disc 1 through the mode of cryogenic tooling.

[0013] Wherein, base disc 1 is the basic part of turbine supercharger drive disc, provides support and installation base for drive structure 2 and other components, also participates in the torque bearing of power transmission process function, wherein, Figure 1 Take the circular flat plate base disc 1 as an example, of course, the base disc 1 can also be the asymmetric shape and other special-shaped disc of adapting special installation space or with the cooperation of specific other components, for the specific size and shape of base disc 1, the utility model embodiment is not limited.

[0014] The SUH409 material is a ferrite stainless steel, which mainly includes iron (Fe), chromium (Cr), titanium (Ti) and other elements. The presence of chromium elements makes it have certain oxidation resistance and corrosion resistance, and the titanium element helps to stabilize the microstructure and improve the high temperature resistance. The base disc 1 adopts the SUH409 material, which can be used at high temperature to ensure that the turbocharger driving disc is in good condition during use, and the driving structure 2 is in an ideal position, so that the turbocharger driving disc can be driven by the driving structure 2. Figure 2 The driving structure 2 in the middle is taken as an example of the yoke ring groove, which can reduce the driving force of the yoke 3 in the yoke ring groove.

[0015] The driving structure 2 is the part of the turbocharger driving disc that directly contacts and transmits power to external components (such as yokes and the like). It adopts stainless steel material, which has higher high-temperature resistance and corrosion resistance, and can adapt to the harsh working environment of the turbocharger, such as high-temperature exhaust gas and possibly existing corrosive gas. The stainless steel material can be 310S material, 310 material or austenitic stainless steel, as long as it is a stainless steel material with wear resistance. The specific type of stainless steel material used in the utility model is not limited.

[0016] The driving structure 2 is in the form of a ring structure, and the center line coincides with the rotation axis of the base disc 1, which ensures the balance and stable power transmission during rotation. Of course, the specific size, structure and arrangement of the driving structure 2 are not limited in the embodiments of the utility model, as long as they do not affect the realization of the basic function of the turbocharger driving disc. The driving structure 2 is fixedly connected to the outer edge of the base disc 1, which is beneficial to the cooperation with other components (such as swing arm mechanisms, yokes and the like). The actuator drives the driving yoke through the swing arm mechanism, and the driving yoke interacts with the driving structure 2 to drive the driving disc to rotate. This layout makes the power transmission path more direct and compact, reduces unnecessary space occupation, and makes the structure of the turbocharger more compact and reasonable.

[0017] The surface of the driving structure 2 adopts nitriding process, which is a kind of surface heat treatment process. Active nitrogen atoms are allowed to penetrate into the surface of the driving structure 2 at a certain temperature to form a nitriding layer. The nitriding layer has high hardness, good wear resistance and strong corrosion resistance, which can improve the surface performance and service life of the driving structure 2.

[0018] The low-temperature tooling, namely the cold assembly, can be understood as follows: the driving structure 2 or the base disc 1 (or both) is first cooled to a lower temperature, so that the size is reduced, and then the two are quickly assembled; when the temperature returns to normal temperature, a close fit is formed between the two due to thermal expansion and contraction of the materials, so that fixed connection is achieved. In addition, the specific assembly mode is not specifically limited in the embodiments of the present application, for example: interference fit, clearance fit or other types of fasteners can be used, as long as the cold assembly process can be applied to achieve fixed connection between the driving structure 2 and the base disc 1.

[0019] In the embodiments of the present application, the driving structure 2 uses stainless steel material and surface nitriding process to improve the wear resistance of the driving structure 2. Since the SUH409 material has good high-temperature resistance, and the close fit after the low-temperature tooling assembly can reduce the possibility of displacement of the driving structure 2 relative to the base disc 1 under high temperature, compared with the turbocharger driving disc in the prior art, the embodiments of the present application can reduce the risk of high-temperature warping of the turbocharger driving disc.

[0020] As an optional implementation, the stainless steel material is 310S material.

[0021] The above-mentioned 310S material is a kind of stainless steel material, which is a low-carbon version of 310 stainless steel. It has good high-temperature resistance and can maintain stable mechanical properties and corrosion resistance in high-temperature environment. Its maximum working temperature can reach 1150℃, and it has good thermal fatigue resistance and cyclic heating capacity. The application of 310S material to the driving structure 2 can improve the hardness and wear resistance of the driving structure 2, and even in the state of frequent relative motion caused by frequent driving, it can also better resist wear. At the same time, its high-temperature resistance can remain stable in high-temperature environment, reducing the occurrence of high-temperature warping.

[0022] In addition, other stainless steel materials can also be used to replace 310S material, for example: 310 material, which also has excellent high-temperature resistance and can maintain stable mechanical properties and corrosion resistance in high-temperature environment; 2520 stainless steel or other types of stainless steel can also be used according to specific use environment, performance requirements, cost and other factors. The specific type of stainless steel is not specifically limited in the embodiments of the present application, and the use of different types of stainless steel materials does not affect the realization of the basic function of the turbocharger.

[0023] As an optional implementation, the driving structure 2 is assembled on the base disc 1 in the form of interference fit.

[0024] The interference fit can form a tight connection between the driving structure 2 and the base plate 1 at room temperature, and the driving structure 2 can be installed on the base plate 1 by using the principle of thermal expansion and contraction under low-temperature working conditions. When the temperature returns to room temperature, the driving structure 2 expands to form a greater holding force with the base plate 1, and the possibility of loosening or displacement of the driving structure 2 during operation can be effectively reduced. During the operation of the turbocharger at high speed and frequent adjustment of the blade angle, the tight connection can ensure the stability of the overall structure of the driving plate, ensure the stable transmission of power, and enhance the ability of the turbocharger to accurately respond to various working conditions of the engine. In addition, due to the tightness of the interference fit, there is almost no gap or relative movement between the driving structure 2 and the base plate 1, so that more accurate angle control can be achieved when transmitting torque. It is helpful for the turbocharger to more accurately adjust the blade angle to control the turbine inlet airflow cross-sectional area, thereby improving the turbocharging performance of the turbocharger. At the same time, the interference fit can provide a certain degree of sealing effect to prevent dust, impurities or other corrosive media from entering the assembly part of the driving structure 2 and the base plate 1, which is beneficial to maintaining the performance and precision of the driving plate.

[0025] Of course, in other optional embodiments of the present application, other assembly methods can be used instead of interference fit, for example: transition fit, which is suitable for turbochargers that require high relative position accuracy of the driving structure 2 and the base plate 1 during operation, but the torque and vibration they bear are not particularly large. Compared with interference fit, transition fit is relatively easy to assemble, and the requirements for assembly process and equipment are not as strict as interference fit. Gap fit and auxiliary fastening measures can also be used. Gap fit is used for assembly under low-temperature working conditions, that is, there is a certain gap between the driving structure 2 and the base plate 1 during assembly to facilitate installation. After assembly is completed, auxiliary fastening measures are used to ensure the relative position and connection reliability between the two. Other types of assembly methods can also be used, such as adding different types of fasteners. Different assembly methods do not affect the realization of the basic function of the turbocharger driving plate, so the specific assembly method is not limited in the embodiments of the present application.

[0026] As an optional embodiment, the surface of the base plate 1 is cast with an oxidation-resistant coating.

[0027] In this embodiment, the surface of the base plate 1 is cast with an oxidation-resistant coating, which can form a protective film on the surface of the base plate 1 to prevent oxygen and other oxidizing substances from directly contacting the base plate 1 material, thereby reducing the occurrence of oxidation reactions. The above-mentioned oxidation-resistant coating includes various types of oxidation-resistant coatings, such as aluminum oxide coating, silicon carbide coating, zirconium oxide coating, etc. As long as it can be used in a turbocharger, the embodiments of the present application are not limited.

[0028] The above anti-oxidation coating can prevent the surface of the base disc 1 from being oxidized to some extent, reduce the material loss and surface roughening caused by oxidation, and prolong the service life of the base disc 1 to some extent. In addition, reducing oxidation reaction helps to maintain the dimensional accuracy and structural strength of the base disc 1. The possibility of deformation or strength reduction of the base disc 1 due to oxidation is reduced, and the anti-oxidation coating can improve the structural stability of the base disc 1 in a high temperature environment.

[0029] Of course, a thermal spraying process can also be used to heat ceramics, cermet, etc. to a molten or semi-molten state, and then atomize and spray it onto the surface of the base disc 1 through a high-speed gas flow; or use an electrolytic principle to use an electroplating process (such as chrome plating, nickel plating, etc.) to deposit a metal plating layer on the surface of the base disc 1. For example, when chrome plating, the base disc 1 is used as the cathode, the chromium plate is used as the anode, and electricity is passed through the electrolyte containing chromium ions to make the chromium ions reduce and deposit on the surface of the base disc 1 to form a chrome plating layer or other processes instead of the above-mentioned casting of an anti-oxidation coating on the surface of the base disc 1. Similarly, it can also protect the base disc 1 to some extent and maintain the stable structure of the base disc 1. The selection and use of different processes do not affect the realization of the basic function of the turbocharger.

[0030] As an optional embodiment, the anti-oxidation coating is an aluminum oxide coating.

[0031] In this embodiment, aluminum oxide (Al2O3) itself has strong chemical stability and can form a dense and stable aluminum oxide protective film in a high temperature environment; and the melting point of aluminum oxide is as high as 2054°C, which enables it to maintain stable physical and chemical properties in the high temperature working environment of the turbocharger driving disc. Even under long-term high temperature action, the aluminum oxide coating will not easily melt, decompose or evaporate, and can provide reliable anti-oxidation protection for the base disc 1 for a long time. In addition, the aluminum oxide coating has high hardness and can enhance the wear resistance of the surface of the base disc 1. During the operation of the turbocharger driving disc, the base disc 1 may move relative to other parts or be eroded by small particles. The aluminum oxide coating can help the base disc 1 resist these abrasions to some extent, thereby reducing the damage to the surface of the base disc 1, and the aluminum oxide is not easy to chemically react with other corrosive media. This enables the base disc 1 to be effectively protected even in the case of possible contact with other corrosive gases or liquids (such as acidic gases generated by engine combustion, etc.), further improving the corrosion resistance of the base disc 1 and being beneficial to prolonging the service life of the entire turbocharger.

[0032] Of course, in addition to the aluminum oxide coating, zirconium oxide (ZrO2) can also be used, which has a melting point as high as 2715℃, excellent high-temperature resistance, stable structure and performance in extremely high-temperature environments, and good heat insulation performance to reduce heat transfer to the inside of the base plate 1 and reduce the overall temperature of the base plate 1; silicon carbide (SiC) with a hardness second only to diamond can also be used to improve the wear resistance of the surface of the base plate 1; in addition, a silicon nitride (Si3N4) coating can also be used, which has high strength and good toughness, can withstand certain mechanical and thermal stresses, and is not prone to cracking or peeling, which helps to continuously protect the base plate 1. Other types of oxidation-resistant coatings can also be used in other optional embodiments of the present application, and the specific type of oxidation-resistant coating is not specifically limited in the embodiments of the present application.

[0033] As an optional implementation, as Figure 2 , the drive structure 2 includes at least one yoke ring groove.

[0034] In this embodiment, the yoke ring groove evenly distributes the driving force exerted by the yoke 3 on the drive plate. When the yoke 3 interacts with the yoke ring groove, the force is transmitted through the groove wall to the entire drive plate, avoiding local stress concentration. This uniform force transmission helps the drive plate rotate smoothly, reducing vibration and imbalance. During the high-speed rotation of the turbocharger during operation, smooth rotation helps to ensure the reliability and stability of the turbocharger, reduces the wear and fatigue damage of the components, and helps to prolong the service life of the turbocharger. In addition, the design of the yoke ring groove can be easily matched with different types and sizes of yokes 3. According to the specific engine design and performance requirements, appropriate specifications of yokes 3 can be selected to be used with the yoke ring groove, improving the versatility and adaptability of the drive structure 2. For example, in different models or series of engines, if it is necessary to adjust the performance parameters of the VGT supercharger, the yoke 3 can be replaced to achieve this without the need to redesign the entire drive structure 2, thereby saving research and development costs and time.

[0035] Of course, other driving structures 2 can also be used instead of the yoke ring groove. For example, a toothed structure can be designed on the edge of the driving disc, similar to the tooth shape of a gear, and the matched component has a corresponding toothed protrusion. The power is transmitted and the angle is controlled through the meshing of the teeth. When the actuator drives the component connected thereto to rotate, the driving disc is driven to rotate through the meshing of the teeth, so as to change the angle of the guide vane. In addition, a spline groove can be machined on the driving disc, and the matched component has a corresponding spline tooth. The spline tooth and the groove are gap-fitted or transition-fitted, and the torque is transmitted and the relative rotation is realized through the sliding and meshing of the spline tooth in the spline groove. In the optional embodiment of the utility model, the specific shape and specific components of the driving structure 2 are not limited, as long as it can realize the effect of power transmission, and it can be any structure and any component composed driving structure 2 between the actuator and the working component (such as the guide vane). The use of different types of driving structures 2 does not affect the realization of the basic function of the turbocharger driving disc in the utility model.

[0036] As an optional embodiment, the at least one yoke ring groove is uniformly distributed in the circumference, and the bottom profile of the yoke ring groove is in the shape of a circular arc.

[0037] In this embodiment, when the yoke 3 cooperates with the yoke ring groove uniformly distributed in the circumference, the force acting on the driving structure 2 can be uniformly distributed in the circumferential direction during the rotation of the driving structure 2. When the turbocharger is in the working state, the actuator drives the driving disc with the yoke ring groove to rotate through the yoke 3. Since the yoke ring groove is uniformly distributed, the driving force exerted by the yoke is balanced in all directions in the circumference, so that the driving disc will not be eccentric or vibrate during rotation due to uneven force. This is conducive to maintaining the dynamic balance of the turbocharger, especially in high-speed rotating working conditions, which can effectively reduce the vibration and noise caused by unbalanced force and improve the working stability and reliability of the supercharger.

[0038] Among them, the circular arc-shaped bottom profile can effectively alleviate the stress concentration phenomenon. When the yoke 3 exerts force in the yoke ring groove, the force will be transmitted along the groove wall. Compared with sharp corners, the circular arc-shaped profile can make the force more smoothly distributed on the groove wall during transmission, reducing local material fatigue or damage caused by stress concentration. During long-term use, this design is conducive to prolonging the service life of the yoke ring groove, reducing cracks or damage caused by stress concentration, and improving the reliability of the driving structure 2.

[0039] Of course, in other embodiments of the present application, according to different working environments, other arrangements and other shapes of the fork ring groove can also be selected, and the specific arrangement and shape are not specifically limited in the present application, and any fork ring groove with other arrangement or other shape is selected, which does not affect the realization of the basic function of the turbocharger driving disc in the present application.

[0040] In the present application, the turbocharger driving disc includes a base disc 1 and a driving structure 2, wherein the base disc 1 is made of SUH409 material, the driving structure 2 is made of stainless steel material, the surface of the driving structure 2 is treated by nitriding process, the driving structure 2 is in the form of a ring structure, the center line of the driving structure 2 coincides with the rotation axis of the base disc 1, the driving structure 2 is fixedly connected with the outer edge of the base disc 1 on one side of the shaft center, and the driving structure 2 is assembled on the base disc 1 by low-temperature tooling. The driving structure 2 is made of stainless steel material and treated by surface nitriding process, so that the wear resistance of the driving structure 2 is improved. Since the SUH409 material has good high-temperature resistance, and the close fit after low-temperature tooling assembly can reduce the possibility of displacement of the driving structure 2 relative to the base disc 1 under high temperature, compared with the turbocharger driving disc in the prior art, the present application can reduce the risk of high-temperature warping of the turbocharger driving disc.

[0041] In addition, the present application also provides a turbocharger including the turbocharger driving disc provided by any of the embodiments of the present application.

[0042] In addition, the present application also provides a vehicle including the turbocharger provided by any of the embodiments of the present application.

[0043] The above is the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A turbocharger drive disk characterized by, The utility model relates to a turbocharger driving disc, comprising: A base disc and a driving structure, wherein the base disc is made of SUH409 material, the driving structure is made of stainless steel material, the surface of the driving structure is treated by nitriding process, the driving structure is in the form of a whole annular structure, the center line of the driving structure coincides with the rotation axis of the base disc, the driving structure is fixedly connected with the outer edge on one side of the shaft center of the base disc, and the driving structure is assembled on the base disc by means of low-temperature tooling.

2. The turbocharger drive disk as recited in claim 1, wherein, The stainless steel material is 310S material.

3. The turbocharger drive disk of claim 2 wherein, The driving structure is assembled on the base disc by means of interference fit.

4. The turbocharger drive disk of any of claims 1 to 3, characterized in that The surface of the base disc is cast with an oxidation-resistant coating.

5. The turbocharger drive disk of claim 4 wherein, The oxidation-resistant coating is an aluminum oxide coating.

6. The turbocharger drive disk of any of claims 1 to 3, characterized in that The driving structure comprises at least one yoke ring groove.

7. The turbocharger drive disk of claim 6 wherein, The at least one yoke ring groove is uniformly distributed in a circle, and the bottom profile of the yoke ring groove is in the form of a circular arc.

8. A supercharger characterized by, The turbocharger comprises the turbocharger driving disc according to any one of claims 1 to 7.

9. A vehicle characterized by comprising: The vehicle comprises the turbocharger according to claim 8.

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