Exhaust gas kinetic energy conversion type turbocharger nozzle ring

Abstract

The utility model relates to the technical field of turbochargers, in particular to a waste gas kinetic energy conversion type turbocharger nozzle ring. According to the technical scheme, an upper base is installed on a base through a locking bolt, a guide plate is installed between the upper base and the base, the guide plate is fixed to a rotating shaft and drives the rotating shaft to deflect, a deflection block is installed at the end, located on the outer side of the upper base, of the rotating shaft, a lower gear ring is installed on the outer side of the upper base, and the lower gear ring is fixed to the upper gear ring. A driving gear is arranged on the deflection block, and the lower gear ring is meshed with the driving gear when rotating, so that the deflection block drives the guide plate to rotate. The electric push rod pushes the rack to drive the upper gear ring meshed with the rack to rotate, and then the upper gear ring drives the lower gear ring connected with the upper gear ring to rotate, so that the lower gear ring is meshed with the driving gear, the angle adjustment of the guide plate is accurately realized, the waste gas flow guide effect and the kinetic energy conversion efficiency are improved, and good stability and practicability are achieved.

Description

Technical Field

[0001] This utility model relates to the field of turbocharger technology, specifically to a nozzle ring for a turbocharger that converts exhaust gas kinetic energy. Background Technology

[0002] Currently, most automobiles are equipped with turbochargers that match their engines, especially exhaust gas turbochargers, which are commonly used in automobiles to increase engine output power, reduce harmful emissions, lower fuel consumption, save energy, better adapt to high-altitude environments, and compensate for power loss caused by the thin air at high altitudes. The nozzle ring assembly is a key component of today's advanced variable geometry turbochargers, and its quality directly affects the turbocharger's performance. The key to the nozzle ring assembly's performance lies in the multiple nozzle ring blades that rotate simultaneously around their own axes. These blades combine to form an intake channel, and changes in the blade position determine changes in the channel area, thereby controlling the turbine speed and intake volume, adjusting the turbocharger's operating range and boost pressure, and achieving optimal matching between the turbocharger and the engine.

[0003] A search revealed that patent application CN202411144483.2 discloses a variable geometry axial flow turbocharger and its application method. Although this device includes components such as a turbocharger housing, nozzle ring, and power assembly, and can solve the problem of inconvenience in using axial flow turbochargers, the solution is not perfect in terms of power transmission structure and guide plate protection. This results in inaccurate guide plate angle adjustment, affecting the performance and service life of the device. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a turbocharger nozzle ring for waste gas kinetic energy conversion, which solves the problems mentioned in the background art.

[0005] The solution to the above-mentioned technical problems provided by this utility model is as follows:

[0006] A nozzle ring for a turbocharger that converts exhaust gas kinetic energy into mechanical energy includes a base, an upper seat mounted on the base by locking bolts, and a guide plate installed between the upper seat and the base;

[0007] The guide plate is fixed on the rotating shaft, and the guide plate drives the rotating shaft to deflect. A deflection block is installed at one end of the rotating shaft located on the outer side of the upper seat. A lower gear ring is installed on the outer side of the upper seat. A drive gear is provided on the deflection block. When the lower gear ring rotates, it meshes with the drive gear, thereby causing the deflection block to drive the guide plate to rotate.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, an upper gear ring is connected to the lower gear ring, and an electric push rod is mounted on one side of the upper seat, with a rack connected to the output end of the electric push rod.

[0010] The beneficial effects of adopting the above-mentioned further solutions are:

[0011] By incorporating an upper gear ring, an electric actuator, and a rack, a basic structure capable of power transmission and conversion is constructed. The electric actuator, acting as a power source, converts electrical energy into mechanical energy. Its output linear motion is transmitted to the upper gear ring via the rack, providing a feasible power transmission path for subsequent adjustment of the guide plate angle. This allows the entire device to be flexibly adjusted according to actual working conditions. This structural design makes the adjustment operation of the device more convenient and controllable, and compared to traditional fixed structures, it can better adapt to different working environments and needs.

[0012] Furthermore, the upper gear ring meshes with the rack, and the rack is driven by an electric push rod to rotate the upper gear ring.

[0013] The beneficial effects of adopting the above-mentioned further solutions are:

[0014] Utilizing the meshing transmission principle of gears and racks, the linear motion of the electric actuator can be smoothly and efficiently converted into the rotational motion of the upper gear ring. Gear and rack transmission features high transmission precision and efficiency, accurately transmitting the power of the electric actuator to the upper gear ring, ensuring that the upper gear ring rotates according to design requirements. This transmission method allows for more precise control of the guide plate angle adjustment, enabling quick and accurate adjustment of the upper gear ring's rotation angle as needed. This lays the foundation for subsequent precise angle adjustment of the guide plate, improving the overall performance and stability of the device.

[0015] Furthermore, the upper gear ring and the lower gear ring form a compound gear, and the rotation of the upper gear ring drives the lower gear ring to rotate.

[0016] The beneficial effects of adopting the above-mentioned further solutions are:

[0017] Compound gear structures offer significant advantages in power transmission. Firstly, they enable force decomposition and transmission, allowing them to withstand greater loads compared to single gears, thus enhancing the overall strength and reliability of the device. During turbocharger operation, the impact force of exhaust gases is substantial; compound gear structures better handle this complex mechanical environment, ensuring the device is not damaged by overload during long-term operation. Secondly, compound gear drives offer accurate transmission ratios and reliable operation, ensuring synchronous rotation between the upper and lower gear rings. This results in more accurate and smooth guide plate angle adjustment, contributing to improved overall turbocharger stability and efficiency.

[0018] Furthermore, the surface of the guide plate is provided with a wear-resistant coating, which is a tungsten carbide coating with a thickness of 0.1-0.3 mm, and is applied to the surface of the guide plate by physical vapor deposition.

[0019] The beneficial effects of adopting the above-mentioned further solutions are:

[0020] Tungsten carbide coatings possess extremely high hardness (Vickers hardness reaches 1700-2400 HV) and excellent chemical stability and corrosion resistance. During the operation of a turbocharger, the guide plates are subjected to scouring and corrosion by high-speed exhaust gases. Applying a tungsten carbide wear-resistant coating effectively resists this wear and corrosion, reducing guide plate damage and performance degradation caused by wear. The coating thickness is controlled within the range of 0.1-0.3 mm, ensuring sufficient wear resistance without compromising the original structure and performance of the guide plate due to excessive thickness. Physical vapor deposition (PVD) technology enables the coating to adhere uniformly and firmly to the guide plate surface, further improving the protective effect and extending the guide plate's service life, thereby reducing equipment maintenance costs.

[0021] Furthermore, the lower gear ring and the upper gear ring are rotatably mounted on the outer side of the upper seat via bearings, and the rotating shaft is rotatably mounted on the base via bearings.

[0022] The beneficial effects of adopting the above-mentioned further solutions are:

[0023] The use of bearings significantly improves the rotational performance of the device. On one hand, bearings reduce frictional resistance in the lower gear ring, upper gear ring, and shaft during rotation, resulting in smoother rotation, reduced energy loss, and increased overall device efficiency. On the other hand, bearings can withstand certain radial and axial loads, ensuring the stability of the lower gear ring, upper gear ring, and shaft during rotation and preventing vibration or misalignment from affecting the accuracy of guide plate angle adjustment. This stable rotational structure helps improve the overall reliability and service life of the device, ensuring stable operation of the turbocharger under various complex working conditions.

[0024] This invention provides a nozzle ring for a turbocharger that converts exhaust gas kinetic energy. It offers the following advantages:

[0025] The guide plate surface is coated with tungsten carbide, which has extremely high hardness (Vickers hardness of 1700-2400 HV), effectively resisting wear caused by exhaust gas erosion, reducing component damage and performance degradation due to wear, thereby extending the service life of the guide plate and reducing maintenance costs. At the same time, the tungsten carbide coating also has good chemical stability and corrosion resistance, maintaining stable performance in various complex exhaust gas environments.

[0026] A transmission system consisting of an electric actuator, rack, upper and lower gear rings, and drive gears enables precise angle control of the guide plate. The electric actuator converts the rotary motion of the electric motor into the linear reciprocating motion of the actuator. Through its cooperation with the rack and gear rings, the linear motion is converted into the rotational motion of the gears, thereby driving the guide plate to deflect. The angle of the guide plate can be accurately adjusted according to different operating conditions and exhaust gas flow requirements to optimize the exhaust gas guidance effect and improve the turbocharger's efficiency in converting exhaust gas kinetic energy.

[0027] The upper and lower gear rings form a compound gear. This structure enables the decomposition and transmission of force during power transmission, allowing it to withstand greater loads and offering higher strength and stability compared to a single gear. Furthermore, gear transmissions offer advantages such as high transmission efficiency, accurate transmission ratios, and reliable operation, ensuring accurate and smooth adjustment of the guide plate angle, thus contributing to improved reliability and stability of the entire turbocharger.

[0028] The base and upper seat are securely connected by locking bolts, ensuring the stability of the entire nozzle ring structure. Simultaneously, the lower and upper gear rings are rotatably mounted on the outer side of the upper seat via bearings, and the rotating shaft is also rotatably mounted on the base via bearings. The use of bearings reduces frictional resistance during rotation, allowing for smoother deflection of the guide plate and enabling the device to withstand certain radial and axial loads. This ensures the rotational stability of the entire device during operation, contributing to improved service life and work efficiency.

[0029] Driven by an electric push rod, it can achieve remote, centralized, or automatic control. It can be easily integrated with the vehicle's electronic control system, adjusting the guide plate angle in real time according to parameters such as engine speed and load to achieve optimal boosting effect, improving engine performance and fuel economy. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0031] In the attached diagram:

[0032] Figure 1 This is a schematic diagram of the main appearance of this utility model;

[0033] Figure 2 This is a bottom view of the present invention.

[0034] Figure 3 This is a bottom view of the lower gear ring drive deflector block of this utility model.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1. Lower gear ring; 10. Locking bolt; 2. Upper gear ring; 3. Rack; 4. Electric push rod; 5. Upper seat; 6. Deflection block; 601. Drive gear; 7. Guide plate; 8. Base; 9. Rotating shaft. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Please see Figures 1 to 3 As shown, the embodiments provided by this utility model are as follows: Example 1:

[0039] A nozzle ring for an exhaust gas kinetic energy conversion turbocharger includes a base 8, an upper seat 5 mounted on the base 8 via locking bolts 10, and a guide plate 7 installed between the upper seat 5 and the base 8. The surface of the guide plate 7 is coated with a wear-resistant tungsten carbide coating with a thickness of 0.1-0.3 mm, applied via physical vapor deposition. The tungsten carbide coating possesses extremely high hardness (Vickers hardness up to 1700-2400 HV) and good chemical stability and corrosion resistance. During turbocharger operation, the guide plate 7 is subjected to scouring and corrosion by high-speed exhaust gas. The tungsten carbide wear-resistant coating effectively resists this wear and corrosion, reducing damage and performance degradation of the guide plate 7 caused by wear. The coating thickness is controlled within the range of 0.1-0.3 mm to ensure sufficient wear resistance without compromising the original structure and performance of the guide plate 7 due to excessive thickness. Physical vapor deposition (PVD) enables the coating to adhere uniformly and firmly to the surface of the guide plate 7, further improving the protective effect of the coating, thereby extending the service life of the guide plate 7 and reducing the maintenance cost of the device.

[0040] Implementation: 2:

[0041] To enable precise angle adjustment of the guide plate 7, thus improving the overall performance and stability of the device, for example, as shown below. Figure 1As shown in the figure, this utility model also includes: a guide plate 7 fixed on a rotating shaft 9, the guide plate 7 driving the rotating shaft 9 to deflect, a deflection block 6 installed at one end of the rotating shaft 9 located outside the upper seat 5, a lower gear ring 1 installed on the outer side of the upper seat 5, a drive gear 601 provided on the deflection block 6, the lower gear ring 1 meshing with the drive gear 601 when rotating, thereby causing the deflection block 6 to drive the guide plate 7 to deflect, an upper gear ring 2 connected to the lower gear ring 1, the upper gear ring 2 and the lower gear ring 1 forming a compound gear, the lower gear ring 1 and the upper gear ring 2 being rotatably mounted on the outer side of the upper seat 5 via bearings, and the rotating shaft 9 being rotatably mounted on the base 8 via bearings. The use of bearings greatly improves the rotational performance of the device. On the one hand, bearings can reduce the frictional resistance of the lower gear ring 1, the upper gear ring 2 and the rotating shaft 9 during rotation, making the rotation of these components smoother, reducing energy loss and improving the working efficiency of the entire device. On the other hand, the bearings can withstand certain radial and axial loads, ensuring the stability of the lower gear ring 1, upper gear ring 2, and rotating shaft 9 during rotation, and preventing vibration or offset from affecting the accuracy of the guide plate 7 angle adjustment. This stable rotational structure helps improve the overall reliability and service life of the device, ensuring that the turbocharger can operate stably under various complex working conditions. When the upper gear ring 2 rotates, it drives the lower gear ring 1 to rotate. The composite gear structure has significant advantages in power transmission. Firstly, it can achieve force decomposition and transmission, and compared to a single gear, it can withstand a larger load, enhancing the overall strength and reliability of the device. During the operation of the turbocharger, the impact force of the exhaust gas is relatively large. The composite gear structure can better cope with this complex mechanical environment, ensuring that the device will not be damaged by overload during long-term operation. On the other hand, the compound gear transmission has an accurate transmission ratio and reliable operation, ensuring synchronous rotation between the upper gear ring 2 and the lower gear ring 1. This makes the angle adjustment of the guide plate 7 more accurate and stable, contributing to improved stability and efficiency of the entire turbocharger. An electric push rod 4 is mounted on one side of the upper seat 5, with its output end connected to a rack 3. The rack 3 slides at its upper limit on the upper seat 5 via an external limiting block. By setting up the upper gear ring 2, electric push rod 4, and rack 3, a basic structure capable of power transmission and conversion is constructed. The electric push rod 4, as a power source, converts electrical energy into mechanical energy. Its output linear motion can be transmitted to the upper gear ring 2 via the rack 3, providing a feasible power transmission path for subsequent angle adjustment of the guide plate 7. This allows the entire device to be flexibly adjusted according to actual working conditions. This structural design makes the adjustment and operation of the device more convenient and controllable. Compared with the traditional fixed structure, it can better adapt to different working environments and needs. The upper gear ring 2 meshes with the rack 3 for transmission. The rack 3 is driven by the electric push rod 4 to rotate the upper gear ring 2. By utilizing the meshing transmission principle of the gear and rack 3, the linear motion of the electric push rod 4 can be smoothly and efficiently converted into the rotational motion of the upper gear ring 2.The gear and rack transmission 3 features high transmission precision and efficiency, accurately transmitting the power of the electric push rod 4 to the upper gear ring 2, ensuring that the upper gear ring 2 rotates according to design requirements. This transmission method makes the angle adjustment of the guide plate 7 more precise, allowing for quick and accurate adjustment of the rotation angle of the upper gear ring 2 as needed. This lays the foundation for subsequent precise angle adjustment of the guide plate 7, improving the overall performance and stability of the device.

[0042] Working principle:

[0043] When engine operating conditions change, such as changes in speed or load, the electronic control system sends a control signal to the electric push rod 4 based on a pre-set program and real-time monitored parameters. The electric push rod 4 operates on the principle of converting the rotational motion of the electric motor into linear reciprocating motion of the push rod through an internal transmission mechanism such as a lead screw and nut pair or gear and rack 3. Therefore, upon receiving a signal, the electric push rod 4 begins to move, outputting linear thrust.

[0044] The electric actuator 4 drives the rack 3 connected to it to move linearly. Since the rack 3 meshes with the upper gear ring 2, according to the transmission principle of the gear and rack 3, the linear motion of the rack 3 can be accurately and efficiently converted into the rotational motion of the upper gear ring 2. The rotation of the upper gear ring 2 drives the lower gear ring 1 connected to it to rotate synchronously. The upper gear ring 2 and the lower gear ring 1 form a compound gear structure. This structure can achieve force decomposition and transmission when transmitting power. Compared with a single gear, it can withstand a larger load and has higher strength and stability, ensuring the reliability and accuracy of the transmission process.

[0045] When the lower gear ring 1 rotates, its teeth mesh with the drive gear 601 on the deflector block 6, causing the deflector block 6 to rotate around the center of the rotating shaft 9. Because the guide plate 7 is fixedly mounted on the rotating shaft 9, the rotation of the deflector block 6 will drive the guide plate 7 to deflect synchronously through the rotating shaft 9. In this process, through a series of gear transmissions, the linear motion of the electric push rod 4 is ultimately converted into the angle adjustment action of the guide plate 7, realizing flexible and precise control of the angle of the guide plate 7.

[0046] The guide plate 7 is coated with a tungsten carbide wear-resistant coating. Tungsten carbide has extremely high hardness (Vickers hardness reaches 1700-2400 HV) and good chemical stability and corrosion resistance. After the guide plate 7 deflects, it can stably guide the exhaust gas entering the nozzle ring. By accurately adjusting the angle of the guide plate 7 according to different operating conditions and exhaust gas flow rates, the flow direction and velocity of the exhaust gas can be optimized, allowing the exhaust gas to impact the turbine blades in the best possible state. This improves the turbocharger's efficiency in converting exhaust gas kinetic energy, thereby providing a more suitable boost effect for the engine and improving the overall engine performance and fuel economy.

[0047] The electronic control system continuously monitors the engine's operating parameters, such as speed, load, and intake pressure. Once a new change in operating conditions is detected, it will adjust the movement of the electric push rod 4 in a timely manner according to the preset control strategy, repeating the above-mentioned processes of angle adjustment, power transmission, and guide plate 7 deflection. This achieves dynamic adjustment of the guide plate 7 angle, ensuring that the turbocharger is always in the best working condition to adapt to the engine's needs under different operating conditions.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A waste gas kinetic energy conversion type turbocharger nozzle ring, comprising a base (8), an upper seat (5) mounted on the base (8) by locking bolts (10), and a guide plate (7) mounted between the upper seat (5) and the base (8), characterized in that: the guide plate (7) is fixed on a rotating shaft (9), the guide plate (7) drives the rotating shaft (9) to deflect, a deflection block (6) is mounted on one end of the rotating shaft (9) outside the upper seat (5), a lower gear ring (1) is mounted on the outside of the upper seat (5), a drive gear (601) is arranged on the deflection block (6), the lower gear ring (1) meshes with the drive gear (601) when rotating, thereby making the deflection block (6) drive the guide plate (7) to deflect.

2. A waste-gate turbocharger nozzle ring according to claim 1, wherein: an upper gear ring (2) is connected to the lower gear ring (1), an electric push rod (4) is arranged on one side of the upper seat (5), and the output end of the electric push rod (4) is connected with a rack (3).

3. A waste-gate turbocharger nozzle ring according to claim 2, wherein: the upper gear ring (2) meshes with the rack (3) for transmission, the electric push rod (4) drives the rack (3) to drive the upper gear ring (2) to rotate.

4. A waste-gate turbocharger nozzle ring according to claim 2, wherein: the upper gear ring (2) and the lower gear ring (1) form a composite gear, and the upper gear ring (2) drives the lower gear ring (1) to rotate when rotating.

5. A waste-gate turbocharger nozzle ring of claim 1 wherein: a wear-resistant coating is arranged on the surface of the guide plate (7), the wear-resistant coating is a tungsten carbide coating, the coating thickness is 0.1-0.3mm, and the coating is coated on the surface of the guide plate (7) by a physical vapor deposition process.

6. A waste-gate turbocharger nozzle ring of claim 1 wherein: the lower gear ring (1) and the upper gear ring (2) are rotatably mounted on the outside of the upper seat (5) by bearings, and the rotating shaft (9) is rotatably mounted on the base (8) by a bearing.

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