Low-pressure turbine guider with high sealing performance

Abstract

The utility model provides a low-pressure turbine guider with high sealing performance, which belongs to the technical field of turbines, and comprises a turbine casing and a high sealing component, the high sealing component comprises a shape memory alloy ring arranged in the turbine casing, a sealing ring is arranged in the shape memory alloy ring, a guide blade is rotatably connected in the sealing ring, and the shape memory alloy ring is connected with the guide blade. The beneficial effects of the utility model are that whether the sealing ring and the guide vane are displaced, whether the temperature exceeds a preset value, and whether the internal pressure is high are detected; once it is detected that the expansion of the guide vane exceeds a preset range, the control system acts, and the thermal expansion is dynamically compensated by adjusting system parameters through the controller, such as reducing the conveying speed of high-temperature gas and the like, so that a high-sealing state is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of guide device technology, specifically relating to a low-pressure turbine guide device with high sealing performance. Background Technology

[0002] An aero-engine is a highly complex and precise thermodynamic machine. As the heart of an aircraft, it not only powers flight but also drives the development of the aviation industry. Every major revolution in human aviation history is inextricably linked to technological advancements in aero-engines. The core of an aero-engine is the turbine guide vane. Application number "CN202022632899.2" discloses "A Low-Pressure Turbine Guide Vane for an Aero-Engine," which describes how "during use, the high temperature inside the guide vanes causes them to expand, leading to compression and deformation of the turbine casing, affecting the device's performance and reducing its practicality." This invention addresses this issue by incorporating a telescopic column and a spring; the combination of the telescopic column and spring prevents deformation during use. To prevent the turbine casing from being squeezed due to the thermal expansion of the guide vanes, and to ensure the performance of the device by automatically restoring the guide vanes to their original shape after cooling, thus improving the device's usability, this invention addresses the problem that the high temperature inside the guide vanes during use can cause them to expand and compress the turbine casing, leading to deformation and affecting the device's performance. This invention does indeed prevent the turbine casing from being squeezed due to the thermal expansion of the guide vanes during use, and the spring automatically restores the guide vanes to their original shape after cooling, thus ensuring the performance of the device and improving its usability. However, the above-mentioned prior art still has the following problems in actual use:

[0003] In actual use, the preload of the spring is prone to loosening after prolonged use, resulting in inaccurate rebound and instability during use.

[0004] Therefore, providing a more stable guide is of great practical value. Utility Model Content

[0005] The purpose of this invention is to provide a low-pressure turbine guide with high sealing performance, in order to solve the above-mentioned technical problems.

[0006] This utility model provides a low-pressure turbine guide with high sealing performance, including a turbine casing and a high-sealing assembly.

[0007] The turbine casing is made of a nickel-based high-temperature alloy;

[0008] The high-sealing assembly includes a shape memory alloy ring disposed inside the turbine casing, a sealing ring disposed inside the shape memory alloy ring, a guide vane rotatably connected inside the sealing ring, a rotor shaft disposed inside the guide vane, a stabilizer disposed on the outer wall of the rotor shaft, and the outer wall of the stabilizer fixedly connected to the guide vane. The inner wall of the turbine casing is respectively provided with a displacement sensor, a temperature sensor, a pressure sensor and a controller.

[0009] In one embodiment of this utility model, the shape memory alloy ring is made of nickel-titanium alloy.

[0010] In one embodiment of this utility model, the rotor shaft is made of chromium metal.

[0011] In one embodiment of this utility model, the guide vane is cast from titanium alloy.

[0012] In one embodiment of this utility model, the displacement sensor, temperature sensor, pressure sensor and controller are all coated with a high-temperature resistant coating.

[0013] In one embodiment of this utility model, the displacement sensor, temperature sensor, and pressure sensor are all electrically connected to the controller, and the controller is electrically connected to an external power supply.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1) By incorporating a shape memory alloy ring, high-temperature gas can easily enter the guide vane during use, causing the guide vane to change the airflow direction of the high-temperature gas, which in turn drives the rotor shaft to rotate, thus forming an output point. When the rotor shaft rotates, it generates a large amount of heat, which causes the guide vane to expand significantly. The guide vane and the sealing ring expand, continuously compressing the shape guide vane and the shape memory alloy ring, causing the shape memory alloy ring to expand. Through its own memory effect, the shape memory alloy ring can recover its original shape under certain conditions. This characteristic allows the ring-shaped shape memory alloy ring to maintain high stability under external force or temperature changes, and continuously reset itself, increasing its own stability. This slows down the expansion efficiency of the sealing ring and the guide vane, and the shape memory alloy ring can continuously reset itself, thus avoiding the problem of gaps between the sealing ring and the guide vane caused by the expansion of the sealing ring, which would lead to poor sealing performance.

[0016] 2) With the included displacement sensor, temperature sensor and pressure sensor, it is convenient to use these sensors to detect whether the sealing ring and guide vane are displaced, whether their temperature exceeds the preset value, and whether their internal pressure is too high. Once the expansion of the guide vane is detected to exceed the preset range, the control system will take immediate action to dynamically compensate for this thermal expansion by adjusting the system parameters through the controller, such as reducing the delivery speed of high-temperature gas, thereby achieving a more stable high-sealing state. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of one end of the structure of this utility model.

[0020] In the diagram: 100, turbine casing;

[0021] 200. High sealing component; 210. Shape memory alloy ring; 220. Sealing ring; 230. Guide vane; 240. Rotor shaft; 250. Displacement sensor; 260. Temperature sensor; 270. Pressure sensor; 280. Controller. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] Example

[0024] Please see Figure 1 - Figure 2 A high-sealing low-pressure turbine guide includes a turbine casing and a high-sealing assembly.

[0025] Please refer to the details. Figure 1 The turbine casing 100 is made of a nickel-based high-temperature alloy.

[0026] Please see Figure 1 - Figure 2The high-sealing assembly 200 includes a shape memory alloy ring 210 disposed inside the turbine casing 210, a sealing ring 220 disposed inside the shape memory alloy ring 210, a guide vane 230 rotatably connected inside the sealing ring 220, a rotor shaft 240 disposed inside the guide vane 230, the outer wall of the rotor shaft 240 being disposed on a stabilizer, and the outer wall of the stabilizer being fixedly connected to the guide vane 230. The inner wall of the turbine casing 100 is respectively provided with a displacement sensor 250, a temperature sensor 260, a pressure sensor 270 and a controller 280.

[0027] In one specific embodiment, a shape memory alloy ring 210 is provided to facilitate the entry of high-temperature gas into the guide vane 230 during use. This guide vane 230 alters the airflow direction of the high-temperature gas, causing it to drive the rotor shaft 240 to rotate, thus forming an output point. The rotation of the rotor shaft 240 generates a large amount of heat, which causes the sealing ring 220 to expand significantly. This expansion continuously compresses the shape guide vane 230 and the shape memory alloy ring 210, causing the shape memory alloy ring 210 to expand as well. Through its own memory effect, the shape memory alloy ring 210 can recover its original shape under specific conditions. This characteristic allows the ring-shaped shape memory alloy ring 210 to maintain high stability when subjected to external forces or temperature changes, continuously restoring its original shape and increasing its stability. This slows down the expansion efficiency of the sealing ring 220 and guide vane 230, and the shape memory alloy ring 210 continuously resets them, preventing the sealing ring 220 from expanding and creating gaps in the guide vane 230, thus reducing the sealing performance. Furthermore, the included displacement sensor 250, temperature sensor 260, and pressure sensor 270 allow for easy detection of displacement, temperature exceeding preset values, and internal pressure of the sealing ring 220 and guide vane 230 during operation. If the expansion of the guide vane 230 exceeds the preset range, the control system immediately takes action, adjusting system parameters via the controller 280 to dynamically compensate for this thermal expansion, thereby achieving a high sealing performance.

[0028] Please see Figure 1 The shape memory alloy ring 210 is made of nickel-titanium alloy.

[0029] In one specific embodiment, the nickel-titanium alloy allows the nickel-titanium alloy to automatically restore its original shape at a specific temperature during use, so as to pull the guide vane 230 and the sealing ring 220 to reset.

[0030] Please see Figure 1 - Figure 2 The rotor shaft 240 is made of chromium metal.

[0031] In one specific embodiment, the presence of chromium metal allows the rotor shaft 240 to be made more robust and durable during use, thus further enhancing its practicality.

[0032] Please see Figure 1 The guide vane 230 is made of titanium alloy.

[0033] In one specific embodiment, the titanium alloy provides a convenient way to utilize its robust, durable, and lightweight properties, making it easier for the guide vane 230 to rotate during use and reducing the risk of damage.

[0034] Please see Figure 1 The displacement sensor 250, temperature sensor 260, pressure sensor 270 and controller 280 are all coated with high-temperature resistant paint.

[0035] In one specific embodiment, the high-temperature resistant coating allows the displacement sensor 250, temperature sensor 260, pressure sensor 270, and controller 280 to be protected from damage due to high temperatures during use, taking advantage of the coating's high-temperature resistance.

[0036] Please see Figure 1-2 The displacement sensor 250, temperature sensor 260 and pressure sensor 270 are all electrically connected to the controller 280, which is electrically connected to an external power supply.

[0037] In one specific embodiment, the provided controller 280 facilitates the power supply to the electrical equipment during use, avoiding the situation where the electrical equipment cannot be powered when it needs power.

[0038] In use, a shape memory alloy ring 210 is first provided to facilitate the entry of high-temperature gas into the guide vane 230. The guide vane 230 changes the airflow direction of the high-temperature gas, causing it to drive the rotor shaft 240 to rotate, thus forming an output point. The rotation of the rotor shaft 240 generates a large amount of heat, which causes the guide vane 230 to expand significantly. This expansion, along with the expansion of the sealing ring 220, continuously compresses and expands the shape memory alloy ring 210. Through its own memory effect, the shape memory alloy ring 210 can recover its original shape under specific conditions. This characteristic allows the ring-shaped shape memory alloy ring 210 to maintain high stability when subjected to external forces or temperature changes, continuously restoring its shape and increasing its stability, thus ensuring the sealing ring... The expansion efficiency of the sealing ring 220 and guide vane 230 is slowed down, and the shape memory alloy ring 210 can continuously reset them to avoid the sealing ring 220 expanding and causing gaps in the guide vane 230, which would lead to poor sealing performance. Then, the displacement sensor 250, temperature sensor 260 and pressure sensor 270 are used to detect whether the sealing ring 220 and guide vane 230 are displaced, whether their temperature exceeds the preset value, and whether their internal pressure is too high. Once the expansion of the guide vane 230 is detected to exceed the preset range, the control system will take immediate action and adjust the system parameters through the controller 280 to dynamically compensate for this thermal expansion, thereby achieving a high sealing state.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A low-pressure turbine guide with high sealing performance, characterized in that, include: The turbine casing (100) is made of a nickel-based high-temperature alloy; A high-sealing assembly (200) includes a shape memory alloy ring (210) disposed inside a turbine casing (100), a sealing ring (220) disposed inside the shape memory alloy ring (210), a guide vane (230) rotatably connected inside the sealing ring (220), a rotor shaft (240) disposed inside the guide vane (230), the outer wall of the rotor shaft (240) being disposed on a stabilizer, the outer wall of the stabilizer being fixedly connected to the guide vane (230), and a displacement sensor (250), a temperature sensor (260), a pressure sensor (270), and a controller (280) respectively disposed on the inner wall of the turbine casing (100).

2. The high-sealing low-pressure turbine guide vane according to claim 1, characterized in that: The shape memory alloy ring (210) is made of nickel-titanium alloy.

3. A high-sealing low-pressure turbine guide vane according to claim 1, characterized in that: The rotor shaft (240) is made of chromium metal.

4. A high-sealing low-pressure turbine guide vane according to claim 1, characterized in that: The guide vane (230) is cast from titanium alloy.

5. A high-sealing low-pressure turbine guide vane according to claim 1, characterized in that: The displacement sensor (250), temperature sensor (260), pressure sensor (270), and controller (280) are all coated with high-temperature resistant paint.

6. A high-sealing low-pressure turbine guide according to claim 5, characterized in that: The displacement sensor (250), temperature sensor (260) and pressure sensor (270) are all electrically connected to the controller (280), which is electrically connected to an external power supply.

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