One-way valve and gas turbine

Abstract

The invention provides a one-way valve and a gas turbine, and relates to the technical field of gas turbine equipment. The one-way valve comprises a shell, a supporting rib, an outer guide ring, an inner guide ring, a valve element and a baffle ring. No support structure obstruction exists in the annular channel between the valve element and the inner guide ring, and a flow channel is smooth. The outer guide ring plays a good role in guiding airflow, air flows out towards the exhaust side along the outer guide ring, flow separation and backflow areas are effectively avoided, pressure loss is reduced, and air self-circulation efficiency is improved. The supporting ribs play a role in supporting the outer guide ring and the inner guide ring, on one hand, a smooth flow channel can reduce pressure loss, and on the other hand, dust and impurities in air can be prevented from being blocked by the supporting ribs and accumulated around the valve element. Dust particles in the air are prevented from being accumulated near the supporting ribs and the valve element, the problems of valve element clamping stagnation and abrasion caused by impurity accumulation are fundamentally prevented, and it is guaranteed that the valve can reliably operate for a long time in the severe environment of an industrial gas turbine.

Description

Technical Field

[0001] This application relates to the field of gas turbine equipment technology, and more specifically, to a one-way valve and a gas turbine. Background Technology

[0002] The combustion chamber of a gas turbine is one of its core thermodynamic components. Its function is to mix and burn fuel with compressed air, converting chemical energy into the internal energy of the high-temperature, high-pressure gas, thus providing power for the turbine. During the start-up and ignition phases of the gas turbine, external air is used to atomize the fuel within the combustion chamber. External air enters from the exhaust side of the one-way valve, causing the valve core to move and press against the mating structure, closing the one-way valve. When the gas turbine is under no-load or high-operation conditions, the internal circulating pressure differential within the combustion chamber increases. Air from the two channels of the combustion chamber enters from the intake side of the one-way valve, closing the external air supply. The valve core moves under the action of the internal air, opening the one-way valve.

[0003] Existing check valves have high opening pressure thresholds and large flow losses, which can lead to insufficient self-circulating air flow in gas turbines or even failure to start, affecting combustion efficiency and emission performance. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a one-way valve and a gas turbine, which eliminates the return spring in the one-way valve, reduces the weight of the valve core, and effectively improves air utilization efficiency while reducing flow losses, thereby enhancing the combustion efficiency and emission performance of the combustion chamber.

[0005] In a first aspect, this application provides a one-way valve applied to a gas turbine, comprising: The housing is used to connect the intake and exhaust pipes; Support ribs are used to provide structural support for the outer guide ring and the inner guide ring; the support ribs are fixedly connected to the inner wall of the housing; An outer guide ring is used to cooperate with the valve core and the housing to form an airflow guiding channel; the outer guide ring is sleeved on the support rib; An inner guide ring is used to guide and support the axial movement of the valve core; the inner guide ring is fixedly connected to the support rib and is disposed inside the outer guide ring; A valve core is used to move axially to achieve an open or closed state of the valve; at least a portion of the valve core is disposed inside the inner guide ring; A retaining ring is used to cooperate with the valve core to form a seal; the retaining ring is fixedly connected to the inner wall of the air inlet side of the housing.

[0006] In one alternative embodiment, the valve core includes: a guide valve stem and a valve head; The outer diameter of the guide valve handle matches the inner diameter of the inner guide ring, and the outer diameter of the valve head matches the outer diameter of the outer guide ring; the outer diameter of the valve head is larger than the outer diameter of the guide valve handle; the guide valve handle is supported by the inner guide ring in both the open and closed states of the valve.

[0007] In one optional embodiment, the guide valve handle has a groove at one end near the valve head; the inner guide ring has a flange extending toward the guide valve handle on one side near the valve head; the flange is in a tight fit with the groove, and the flange has an air hole for air circulation.

[0008] In one alternative embodiment, at least three of the said support ribs are included; the plurality of said support ribs are evenly arranged circumferentially on the inner wall of the housing.

[0009] In one optional embodiment, the end of the retaining ring near the exhaust side of the housing is provided as a conical surface; the end of the valve core near the intake side of the housing is provided as a conical surface. When the valve core is near the air intake side of the housing, the conical surface of the valve core is in close contact with the conical surface of the retaining ring.

[0010] In one alternative embodiment, the end of the support rib near the air intake side of the housing is provided as a conical surface; When the valve core is near the exhaust side of the housing, the conical surface of the valve core is in close contact with the conical surface of the support rib.

[0011] In one alternative embodiment, the valve core has an internal thread at one end near the exhaust side of the housing; the internal thread is used to thread the mounting screw of the valve core.

[0012] In one alternative embodiment, the housing, the support rib, the inner guide ring, and the outer guide ring are all manufactured using 3D printing.

[0013] In one optional embodiment, the air inlet side and the air outlet side of the housing are respectively provided with locking holes for installing threaded sleeves or screws.

[0014] Secondly, this application provides a gas turbine, including: any one-way valve as described in the first aspect above.

[0015] This application provides a one-way valve and a gas turbine. The one-way valve includes: a housing, support ribs, an outer guide ring, an inner guide ring, a valve core, and a retaining ring. There are no obstructing support structures within the annular channel between the valve core and the inner guide ring, ensuring unobstructed flow. The outer guide ring effectively guides the airflow, directing it towards the exhaust side, effectively preventing flow separation and backflow zones, reducing pressure loss, and improving air self-circulation efficiency. The support ribs support the outer and inner guide rings, reducing pressure loss through the unobstructed flow channel and preventing dust and impurities from accumulating around the valve core. This prevents dust particles from accumulating near the support ribs and valve core, fundamentally preventing valve core jamming and wear caused by impurity buildup, and ensuring long-term reliable operation of the valve in the harsh environment of industrial gas turbines. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the one-way valve in the closed state provided in an embodiment of this application.

[0017] Figure 2 This is a schematic diagram of the one-way valve in the open state provided in an embodiment of this application.

[0018] Figure 3 This is a structural schematic diagram of the cross-section of the one-way valve AA provided in an embodiment of this application.

[0019] Figure 4 This is a schematic diagram of the structure of the one-way valve core provided in the embodiments of this application.

[0020] Wherein, 1-shell; 1-1-shell locking hole; 2-support rib; 3-outer guide ring; 4-inner guide ring; 4-1-flange; 5-retaining ring; 6-valve core; 6-1-valve core internal thread; 6-2-valve head; 6-3-guide valve handle; 6-4-groove; 6-5-gap. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of this application more apparent and understandable, specific embodiments of this application are described in detail below with reference to the accompanying drawings. Although some embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this application. It should be understood that the accompanying drawings and embodiments of this application are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0022] It should be noted that in the description of this application, the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale; for example, the thickness or width of some layers may be exaggerated relative to other layers.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be discussed or described in detail in the description of the subsequent figures.

[0025] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0026] In related technologies, the fuels used in gas turbine combustion chambers are becoming increasingly diversified, but liquid fuels (such as diesel) remain one of the main fuels used in combustion chambers. When using liquid fuels, they need to be atomized. Atomized liquid fuel is broken into countless micron-sized droplets, greatly promoting evaporation and mixing with air, thereby achieving rapid, complete, and stable combustion. Current liquid fuel atomization schemes utilize external air for atomization during the gas turbine's start-up and ignition phases to ensure reliable ignition and stable combustion. During no-load and high-operation phases, the pressure difference between the two combustion chamber channels and the flame tube enables internal circulation of combustion chamber air. Air from these two channels is introduced into the nozzle's atomizing air channel through pipes and one-way valves for liquid fuel atomization.

[0027] To ensure efficient transmission of circulating air within the combustion chamber even under low operating conditions of the gas turbine or when the internal pressure differential of the combustion chamber is small, the following requirements are put forward for the one-way valve structure used for combustion chamber air self-circulation: minimize the flow loss of air inside the one-way valve.

[0028] Conventional check valves often use spring return, requiring airflow to overcome spring preload to open the valve, resulting in a high opening pressure threshold and significant flow losses. At low operating conditions and critical points where the internal circulation pressure differential is small in gas turbines, this can lead to insufficient self-circulating airflow or even the inability to establish self-circulation, affecting combustion efficiency and emissions performance in the combustion chamber.

[0029] Furthermore, common check valves employ a plane-to-plane or plane-to-spherical contact stop structure, which makes the valve core prone to tilting and high-frequency vibration (i.e., "flutter") in the airflow. This results in unstable line or point contact, exacerbating impact wear and fatigue damage to the contact surfaces, severely shortening the service life of the check valve, and posing a significant safety hazard. Simultaneously, gas turbines are often used in dusty environments such as industrial areas, where the air inside the combustion chamber carries dust particles. However, current conventional check valve structures lack dustproof measures, which may lead to wear, jamming, and failure of the check valve over long-term use. The complex internal flow channels and precision-fitting components within the check valve make traditional machining and welding processes difficult, time-consuming, and costly. Therefore, there is an urgent need for a check valve structure that is dustproof, vibration-proof, has low flow loss, is reliable in operation, and is easy to manufacture and assemble to meet the self-circulation requirements of gas turbine combustion chamber air.

[0030] This embodiment provides a one-way valve and a gas turbine, which solves the core technical pain points of current one-way valves, such as large flow loss, vibration fatigue, dust jamming, and manufacturing difficulties. It proposes a one-way valve for combustion chamber air self-circulation with small flow loss, reliable sealing, and less susceptibility to air impurities. It also proposes a practical processing and assembly scheme, which has extremely high market application value.

[0031] Firstly, the embodiments of this application provide a one-way valve applied to a gas turbine, such as... Figure 1 As shown, the one-way valve includes: a housing 1, a support rib 2, an outer guide ring 3, an inner guide ring 4, a valve core 6, and a retaining ring 5.

[0032] Housing 1 is used to connect the intake pipe and the exhaust pipe; housing 1 connects the intake pipe and the exhaust pipe, forming the valve body and the boundary of the external flow channel.

[0033] Support rib 2 provides structural support for the outer guide ring 3 and the inner guide ring 4; support rib 2 is fixedly connected to the inner wall of the housing 1.

[0034] The outer guide ring 3 is used to cooperate with the valve core 6 and the housing 1 to form an airflow guiding channel; the outer guide ring 3 is sleeved on the support rib 2.

[0035] The inner guide ring 4 is used to guide and support the axial movement of the valve core 6; the inner guide ring 4 is fixedly connected to the support rib 2, and the inner guide ring 4 is coaxially arranged inside the outer guide ring 3.

[0036] The valve core 6 is used to move axially to achieve the open and closed states of the valve; at least a portion of the core of the valve core 6 is disposed inside the inner guide ring 4.

[0037] The retaining ring 5 is used to cooperate with the valve core 6 to form a seal; the retaining ring 5 is fixedly connected to the inner wall of the air inlet side of the housing 1.

[0038] In one embodiment of this application, the intake side of the one-way valve housing 1 is connected to the combustion chamber casing via a pipe, and the exhaust side is connected to the nozzle atomizing air main via a pipe. For example... Figure 1 As shown, when the gas turbine starts and ignites, the compressor speed is low, and a sufficient pressure difference has not yet been formed between the two channels of the combustion chamber and the flame tube. Therefore, external air needs to be used. After entering the nozzle atomizing air main, part of the external air flows into the one-way valve. The external air enters from the exhaust side of the one-way valve and flows into the inner guide ring. The hydrodynamic force of the external air acts on the valve core 6. Under the action of the hydrodynamic force of the external air, the valve core 6 moves along the inner guide ring 4 towards the intake side of the one-way valve and moves to the retaining ring 5. The valve core 6 and the retaining ring 5 form a uniform annular contact zone, the fluid channel is closed, and the gas from the combustion chamber casing is prevented from entering the one-way valve, ensuring that the one-way valve is closed without leakage.

[0039] Understandably, in order to guide the external air entering from the exhaust side to the inner guide ring 4, thereby pushing the valve core 6 to move, in one embodiment of this application, the end of the support rib 2 near the exhaust side can be configured as a guide slope that can guide the external air into the inner guide ring 4. In other embodiments of this application, a guide channel can also be provided to guide the external air into the inner guide ring 4, one end of which is connected to the opening at the end of the inner guide ring 4 near the exhaust side, and the other end of which is connected to the external air inlet channel.

[0040] With the improvement of working conditions, such as Figure 2As shown, the pressure difference between the two channels in the combustion chamber and the flame tube increases. When the one-way valve is open, the external air supply stops, and the air in the combustion chamber is drawn into the one-way valve due to the pressure difference. The circulating air in the combustion chamber enters from the intake side of the one-way valve. The valve core 6, under the fluid pressure on the intake side, disengages from the retaining ring 5 and moves along the inner guide ring 4 towards the exhaust side of the one-way valve. When the valve core 6 is pushed to the end of the support rib 2 near the intake side, the inner guide ring 4 is closed by the valve core 6, preventing air from flowing through it. This ensures the cleanliness of the guide ring 4, preventing dust particles carried by the air in the combustion chamber from entering the guide ring 4, and ensuring that the valve core 6 does not experience wear, jamming, or failure. In this embodiment, during the process of the one-way valve opening from closed to open under fluid pressure, the support rib 2, in addition to providing support, also limits the movement of the valve core 6. In this embodiment, after the one-way valve is opened, the airflow flowing in from the intake side flows through the valve core 6 and the housing 1 to form an air circulation loop and flows towards the exhaust side along the outer guide ring 3. The outer guide ring 3 and the valve core 6 can have the same outer diameter, which together guide the fluid to ensure smooth airflow and avoid flow separation and vortex shedding.

[0041] In this embodiment, the valve core 6 is made of a lightweight material, such as silicon nitride ceramic, ceramic matrix composite, or carbon-based carbon fiber composite. Using a lightweight material reduces the friction between the valve core 6 and the inner guide ring 4. The structure connecting the support rib 2 and the outer guide ring is located inside the outer guide ring 3, ensuring unobstructed flow within the annular channel between the valve core 6 and the inner guide ring 4. Simultaneously, when the valve is open, the annular channel formed between the outer surface of the valve core 6 and the outer guide ring 3 and the inner surface of the housing 1 effectively carries the high-speed airflow. This channel provides excellent airflow guidance, allowing the airflow to flow smoothly within the annular channel and exit towards the exhaust side along the outer guide ring 3. The outer guide ring 3 effectively prevents flow separation and backflow zones, significantly reducing pressure loss and improving air self-circulation efficiency. The rear section of the support rib 2, connected to the housing 1, is far from the valve core 6, while the front section, which provides support, is located inside the outer guide ring 3. This unobstructed flow reduces pressure loss and prevents dust and impurities in the air from accumulating around the valve core 6 due to obstruction by the support rib 2. This prevents dust particles in the air from accumulating near the support rib 2 and valve core 6, fundamentally preventing the valve core 6 from getting stuck and worn due to the accumulation of impurities, and ensuring the valve operates reliably for a long time in the harsh environment of industrial gas turbines.

[0042] In one embodiment of this application, such as Figure 3As shown, the cross-section of the support rib 2 is generally L-shaped. One end of one side is fixedly connected to the inner wall of the housing 1, and the other side extends along the axial direction of the housing 1, forming support and fixation for the outer guide ring 3 and the inner guide ring 4. It can be understood that the side of the support rib 2 extending along the axial direction of the housing 1 is essentially positioned between the outer guide ring 3 and the inner guide ring 4, and is fixedly connected to the inner wall of the outer guide ring 3 and the outer wall of the inner guide ring 4, respectively. To further reduce the obstruction of the air entering from the intake side by the support rib 2, the side of the support rib 2 fixedly connected to the inner wall of the housing 1, near the intake side, can be set as a ridge with a guiding function. Thus, the side of the support rib 2 in the airflow guide channel that directly faces the air flowing from the intake side is no longer a plane, but a ridge with a smaller obstruction area. Additionally, the inclined surface that guides the air flowing from the exhaust side in the above embodiment can be set on the side of the support rib 2 fixedly connected to the inner wall of the housing 1, near the exhaust side. It is understandable that the check valve provided in this embodiment eliminates the spring structure inside a traditional check valve, thus avoiding air pressure loss and achieving air self-circulation with minimal pressure loss. Eliminating the spring structure also significantly reduces the overall weight of the check valve.

[0043] The support ribs are fixedly connected to the outer guide ring, creating a smooth and unobstructed airflow path between the housing and the outer guide ring. After air enters the intake side of the one-way valve, it flows through the air loop formed by the valve core and the housing, and then directly towards the exhaust side along the airflow path between the housing and the outer guide ring. This reduces the one-way valve's obstruction of airflow, allowing the gas turbine to open and establish effective air self-circulation even at low operating conditions. Because the air on the intake side does not flow through the internal channel of the inner guide ring, impurities contained in the intake air cannot accumulate in the internal channel of the inner guide ring. This isolates the airflow path from the valve core's movement path, effectively preventing the accumulation of dust and impurities in the air. This solves the problems of flow resistance and impurity accumulation in the valve core's movement path, avoiding valve core jamming, wear, and sealing failure.

[0044] In one embodiment of this application, the support ribs 2 include at least three. Multiple support ribs 2 are evenly arranged circumferentially on the inner wall of the housing 1, and at least three support ribs 2 can form a stable support frame, providing more stable support and positioning for the outer guide ring and the inner guide ring 4.

[0045] In one embodiment of this application, the end of the retaining ring 5 near the exhaust side of the housing 1 is provided with a conical surface; the end of the valve core 6 near the intake side of the housing 1 is provided with a conical surface; when the end of the valve core 6 near the intake side of the housing 1 is close to the intake side of the housing 1, the conical surface of the valve core 6 is in close contact with the conical surface of the retaining ring 5. When the one-way valve is closed, the valve core 6 is moved along the inner guide ring 4 to the retaining ring 5 by the aerodynamic force of the external air. At this time, the conical surface of the valve core 6 is in close contact with the conical surface of the retaining ring 5, the fluid passage is closed, and the one-way valve is closed without leakage. The end of the support rib 2 near the intake side of the housing 1 is provided with a conical surface; when the end of the valve core 6 near the exhaust side of the housing 1 is close to the exhaust side of the housing 1, the conical surface of the valve core 6 is in close contact with the conical surface of the support rib 2. When the one-way valve is open, under the combined action of fluid pressure and the conical geometry, the valve core 6 can automatically adjust to a position coaxial with the support rib 2 and remain stable.

[0046] In this embodiment, the contact surfaces of the valve core 6, the retaining ring 5, and the support rib 2 are all designed as conical surfaces. These conical surfaces have self-centering capabilities. Under the combined action of fluid pressure and the geometry of the conical surface, the valve core 6 automatically adjusts to a position coaxial with the structure to which the mating conical surface belongs (retaining ring 5 and support rib 2), forming a uniform annular contact band. The self-centering capability of the conical surface prevents vibration caused by the valve core 6 being misaligned, ensuring a tight and leak-free closure of the check valve. The check valve and the supporting portion of the housing 1 are located far from the valve core 6, preventing the accumulation of dust particles near the sealing conical surface of the valve core 6 over long-term use, which could lead to problems such as check valve jamming and wear.

[0047] In one embodiment of this application, see Figure 2 The valve core 6 has an internal thread 6-1 at one end near the exhaust side of the housing 1; the internal thread 6-1 is used to thread the mounting screw of the valve core 6.

[0048] When installing valve core 6, first screw a threaded rod into the internal thread 6-1 of valve core 6, and insert valve core 6 from the air inlet side of housing 1, so that valve core 6 fits into inner guide ring 4. At this time, the other end of the screw will protrude from the exhaust side of housing 1. By fixing the screw on the exhaust side, the position of valve core 6 is temporarily fixed. Valve core 6 is temporarily fixed in a predetermined position. In this embodiment, the predetermined position is the position of valve core 6 in inner guide ring 4 when valve core 6 is in contact with support rib 2. Insert retaining ring 5 into housing 1 from the air inlet side and weld retaining ring 5 to the inner wall of housing 1. Since the position of valve core 6 is fixed, the gap between retaining ring 5 and valve core 6 in the closed position can be precisely controlled. After the welding has cooled, unscrew the screw from the exhaust side and remove it. At this point, the one-way valve assembly is complete, and valve core 6 can move freely between retaining ring 5 and support rib 2.

[0049] The assembly process of valve core 6 is simple and precise. By pre-setting internal threads 6-1 on valve core 6 and using temporary screws for positioning, the welding process of retaining ring 5 is simple and reliable, ensuring assembly accuracy. After assembly, the screws can be removed. The operation is convenient and efficient, and it has extremely high engineering feasibility.

[0050] In one embodiment of this application, the housing 1, the support rib 2, the inner guide ring 4, and the outer guide ring 3 can all be manufactured by 3D printing.

[0051] In this embodiment, the housing 1, support rib 2, outer guide ring 3, and inner guide ring 4 in the one-way valve structure are integrally formed in one step using 3D printing (e.g., additive manufacturing technology in 3D printing), which can greatly reduce the processing cycle and process difficulty. It eliminates the need for complex machining and welding processes, significantly simplifying the process flow, shortening the manufacturing cycle, and reducing production costs. It should be noted that traditional processes can also be used, where the housing 1, support rib 2, outer guide ring 3, and inner guide ring 4 are machined separately and then assembled together through precision positioning and welding.

[0052] In one embodiment of this application, see Figure 3 The air inlet side and the air outlet side of the housing 1 are respectively provided with locking holes 1-1 for installing threaded sleeves or screws.

[0053] It should be noted that the locking hole 1-1 refers to a hole on the housing 1 used for installing threaded inserts or screws and other fasteners, which enhances the reliability and stability of the threaded connection. In this embodiment, the locking hole 1-1 on the housing 1 can reduce uneven stress on the internal thread teeth and resist impact vibration, improve the fatigue strength of the thread, reduce thread wear, enhance corrosion resistance, and extend the life of the screw hole. In addition, the screw hole can also be used to fix the housing 1 to other components, ensuring the structural stability of the equipment.

[0054] In one embodiment of this application, see Figure 4 The valve core 6 includes: a guide valve handle 6-3 and a valve head 6-2.

[0055] The outer diameter of the guide valve handle 6-3 matches the inner diameter of the inner guide ring, and the outer diameter of the valve head 6-2 matches the outer diameter of the outer guide ring 3. The outer diameter of the valve head 6-2 is larger than the outer diameter of the guide valve handle 6-3. In both the open and closed states of the valve, at least a portion of the core of the guide valve handle 6-3 is disposed within the inner guide ring 4, which provides support for the valve core 6. In this embodiment, the guide valve handle 6-3 is a hollow cylindrical structure with uniform wall thickness, and its outer diameter precisely matches the inner diameter of the inner guide ring 4. The hollow cavity of the guide valve handle 6-3 does not affect its guiding and supporting function, and can also reduce the amount of material used in the guide valve handle, directly reducing the overall weight of the valve core. The lightweight valve core reduces frictional resistance, allowing the valve to respond quickly under high and low temperature and high and low pressure conditions, avoiding jamming or delay. The guide valve handle 6-3 has a groove 6-4 at one end near the valve head 6-2; the inner guide ring 4 has a flange 4-1 extending toward the guide valve handle 6-3 on one side near the valve head 6-2; the flange 4-1 is in a tight fit with the groove 6-4, and the flange 4-1 is provided with an air hole for air circulation.

[0056] In one embodiment of this application, the valve core 6 is generally umbrella-shaped, the guide valve handle 6-3 is the umbrella handle, and the valve head 6-2 is the umbrella surface. The valve head 6-2 can be generally frustum-shaped, wherein the circular surface facing the intake side is smaller than the circular surface facing the exhaust side. Further, an annular groove can be formed at the end of the valve head 6-2 facing the exhaust side, which fits with the frustum portion (i.e., the conical portion) formed by the inner guide ring 4, the outer guide ring 3, and the support rib 2.

[0057] It is understandable that multiple grooves 6-4 can be provided on the end of the guide valve handle 6-3 near the valve head 6-2. These multiple grooves 6-4 can be evenly distributed along the circumference of the guide valve handle 6-3, or they can be set as grooves that are opened along the entire circumference of the guide valve handle 6-3. Correspondingly, the inner guide ring 4 needs to be provided with multiple fan-shaped annular flanges 4-1 or a whole annular flange 4-1 extending towards the guide valve handle 6-3 on the side near the valve head 6-2.

[0058] In this embodiment, during the movement of the valve core 6 toward the retaining ring 5, the flange 4-1 and the groove 6-4 will undergo relative movement. The air in the groove 6-4 will be discharged through the vent on the flange 4-1. Since the flow capacity of the vent is limited, the air discharge will generate a damping force, which will hinder the rapid relative movement between the flange and the groove, thereby slowing down the movement speed of the valve core and achieving buffering.

[0059] It should be noted that in this embodiment, the flange 4-1 and the groove 6-4 are in a tight fit. If a gap 6-5 is provided between the flange 4-1 and the groove 6-4, air can be expelled from the groove 6-4 through the gap 6-5, achieving the same purpose. Furthermore, when the fit between the flange 4-1 and the groove 6-4 reaches its limit, they will mechanically contact and limit the movement of the valve core, preventing excessive movement of the valve core due to inertia, thus serving a dual function of buffering and positioning.

[0060] In summary, the combination of air damping and mechanical limiting between the groove 6-4 and the flange 4-1 achieves a buffering effect during the movement of the valve core, which reduces the impact of movement and ensures the stability of valve operation.

[0061] Secondly, this application provides an embodiment of a gas turbine. The gas turbine includes: a one-way valve as described in any of the embodiments of the first aspect above.

[0062] This embodiment provides a gas turbine including the one-way valve described in any embodiment of the first aspect. This one-way valve can effectively improve air utilization efficiency and reduce flow losses, meaning that it can open and establish effective air self-circulation even under low operating conditions of the gas turbine, thus widening the operating range of the gas turbine's combustion chamber air self-circulation. This directly translates into higher fuel combustion efficiency, better emission standards, and a wider operational stability margin for the gas turbine, reducing gas turbine costs and improving overall gas turbine performance. The one-way valve adopts a conical sealing structure and a dustproof and vibration-resistant design, which greatly improves fatigue resistance and service life, meeting the requirements of long service life and high reliability of the gas turbine. It significantly reduces the risk of unplanned downtime caused by one-way valve failure, reduces maintenance and replacement costs, and brings direct and considerable economic benefits to users.

[0063] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A one-way valve applied to a gas turbine, characterized in that, include: The housing is used to connect the intake and exhaust pipes; Support ribs are used to provide structural support for the outer guide ring and the inner guide ring; the support ribs are fixedly connected to the inner wall of the housing; An outer guide ring is used to cooperate with the valve core and the housing to form an airflow guiding channel; the outer guide ring is sleeved on the support rib; An inner guide ring is used to guide and support the axial movement of the valve core; the inner guide ring is fixedly connected to the support rib and is disposed inside the outer guide ring; A valve core is used to move axially to achieve an open or closed state of the valve; at least a portion of the valve core is disposed inside the inner guide ring; A retaining ring is used to cooperate with the valve core to form a seal; the retaining ring is fixedly connected to the inner wall of the air inlet side of the housing.

2. The one-way valve according to claim 1, characterized in that, The valve core includes: a guide valve stem and a valve head; The outer diameter of the guide valve handle matches the inner diameter of the inner guide ring, and the outer diameter of the valve head matches the outer diameter of the outer guide ring; the outer diameter of the valve head is larger than the outer diameter of the guide valve handle; the guide valve handle is supported by the inner guide ring in both the open and closed states of the valve.

3. The one-way valve according to claim 2, characterized in that, The guide valve handle has a groove at one end near the valve head; the inner guide ring has a flange extending toward the guide valve handle on one side near the valve head; the flange is used to seal with the groove, and the flange has an air hole for air circulation.

4. The one-way valve according to claim 1, characterized in that, It includes at least three of the aforementioned support ribs; the plurality of the aforementioned support ribs are evenly arranged circumferentially on the inner wall of the housing.

5. The one-way valve according to claim 1, characterized in that, The end of the retaining ring near the exhaust side of the housing is provided with a conical surface; the end of the valve core near the intake side of the housing is provided with a conical surface. When the valve core is near the air intake side of the housing, the conical surface of the valve core is in close contact with the conical surface of the retaining ring.

6. The one-way valve according to claim 5, characterized in that, The end of the support rib near the air intake side of the housing is provided as a conical surface; When the valve core is near the exhaust side of the housing, the conical surface of the valve core is in close contact with the conical surface of the support rib.

7. The one-way valve according to claim 5, characterized in that, The valve core has an internal thread at one end near the exhaust side of the housing; the internal thread is used to thread the valve core's mounting screw.

8. The one-way valve according to claim 1, characterized in that, The shell, the support rib, the inner guide ring, and the outer guide ring are all manufactured using 3D printing.

9. The one-way valve according to claim 1, characterized in that, The air inlet and exhaust sides of the housing are respectively provided with locking holes for installing threaded sleeves or screws.

10. A gas turbine, comprising: The one-way valve as described in any one of claims 1-9.

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