Detachable anti-icing stator ring

Abstract

The invention belongs to the field of machinery-engines, and relates to an anti-icing stator ring, in particular to a detachable anti-icing stator ring. The anti-icing stator comprises a front outer ring, a rear outer ring, a check ring, anti-icing stator blades, an inner ring and a connecting structure. According to the detachable anti-icing stator ring, the annular parts with simple shapes and the anti-icing stator blades matched with the annular parts are clamped together through the matching structures among the parts and finally locked through the threaded connection structures, and the detachable anti-icing stator ring is achieved. Through cooperation of the stop ring, the anti-icing stator blade cylinder, the semicircular section plug and other structures, high-precision cooperation of main parts is achieved, and the position precision of an air pipeline connector in the anti-icing stator blade is effectively controlled. And the anti-icing capability can be ensured more effectively.

Description

Technical Field

[0001] The present invention belongs to the field of machinery - engines, relates to an anti - ice stator ring, and specifically relates to a detachable anti - ice stator ring. Background Art

[0002] The stator ring is an important part in the compressor components of an aero - gas turbine engine. The stator ring with anti - ice function belongs to a relatively special type among them, and complex - shaped high - temperature air flow pipelines are arranged inside each anti - ice stator blade. To ensure the smooth flow of high - temperature air in the pipelines, generally, higher precision requirements are put forward for the interfaces at the inlets and outlets of the pipelines during design. And to ensure the anti - ice ability, air flow inspection needs to be carried out on each blade, and generally, the inspection method of water flow test is selected. Due to the complex internal structure of the anti - ice stator blade and the relatively harsh working environment, the probability of a single blade failing the flow inspection or being damaged is relatively high during use. At this time, it is necessary to replace the anti - ice stator blade separately.

[0003] The implementation scheme closest to the present invention is the welded anti - ice stator ring, which consists of three main parts: an inner ring, anti - ice stator blades, and an outer ring. Leaf - shaped holes (special - shaped holes with a blade cross - section shape) are arranged on the inner and outer rings, so that the blades can be welded to the inner and outer rings. Complex - shaped high - temperature air flow pipelines are also arranged inside the anti - ice stator blades.

[0004] For the existing anti - ice stator ring, its process route is complex. Welding causes deformation of the internal air pipeline interfaces, making it difficult to align with the interfaces on the mating parts. And the structure where the blades are welded to the inner and outer rings as a whole makes it impossible to repair by replacing the blades when a single blade fails or is damaged, and the entire stator ring can only be scrapped. Summary of the Invention

[0005] Object of the Invention

[0006] On the premise of only using simple process methods, design an anti - ice stator ring with high precision of the internal air pipeline interfaces of the stator blades, convenient disassembly and replacement of the blades, and simple structure. The present invention upgrades the welded integral anti - ice stator ring to a detachable anti - ice stator ring and improves the precision of the internal pipeline interface positions of the anti - ice stator blades.

[0007] Technical Solution

[0008] The present invention uses several ring - shaped parts with simple shapes and the mating anti - ice stator blades, which are clamped together through the mating structure between the parts, and finally locked with a threaded connection structure to realize a detachable anti - ice stator ring.

[0009] A detachable anti-icing stator ring, comprising a front outer ring, a rear outer ring, a stop ring, anti-icing stator blades, an inner ring, and a connection structure; on the side of the anti-icing stator blade away from the axis, there is a first plug with a semi-circular cross-section. Inside the anti-icing stator blade, there is an air pipeline, whose inlet is located at the first plug to communicate with the hot air supply pipe, and the outlet is located on the side of the anti-icing stator blade close to the axis; in front of the first plug, there is a front outer ring, and behind the first plug, there are a rear outer ring and a stop ring respectively. The rear outer ring has a clearance fit with the first plug, and the stop ring has a clearance fit with the rear outer ring. The front outer ring and the stop ring jointly form a profile surface adapted to the first plug and are fixed through a connection structure, thereby realizing the restraint of the anti-icing stator blade; the surfaces of the front outer ring and the rear outer ring close to the axis jointly form the outer flow path of the anti-icing stator ring; on the side of the anti-icing stator blade close to the axis, there is a cylindrical second plug, and on the inner ring, there is a circular groove adapted to the shape of the second plug. The surface of the inner ring away from the axis is the inner flow path of the anti-icing stator ring, and on the inner ring, there are mounting holes for connecting with the upstream components of the engine. A number of anti-icing stator blades form an annular anti-icing stationary ring through connection with the front outer ring, the rear outer ring, the stop ring, and the inner ring.

[0010] Further, the material of the front outer ring is ZL105A.

[0011] Further, the material of the rear outer ring is ZL105A.

[0012] Further, the material of the stop ring is ZL105A.

[0013] Further, both the rear outer ring and the stop ring are provided with weight-reducing grooves.

[0014] Further, a pin is used for circumferential position limitation between the front outer ring and the rear outer ring.

[0015] Further, the material of the anti-icing stator blade is ZGCr17Ni2. It uses a casting blank, and the main part of the internal hot air pipeline is processed by casting, and the inlet and outlet are processed by machining.

[0016] Further, the material of the inner ring is LY11.

[0017] Further, the connection form of the connection structure depends on different application scenarios, and specific different forms such as stud - nut - lock washer, stud, self-locking nut, locking wire thread insert - bolt, and locking wire thread insert - screw are adopted.

[0018] The beneficial effects of this application are as follows:

[0019] The main technological processes involved in the traditional anti-icing stator ring are: blank preparation - machining (involving blade profile machining, conventional cylindrical, round hole, and plane machining, and blade profile hole machining) - welding - shape correction - machining. It can only be processed by a processing factory with welding capabilities.

[0020] The main structures of the present invention are all conventional structures, and the main technological processes involved are: blank preparation - machining (involving blade profile machining, conventional cylindrical, round hole, and plane machining) - assembly. The technological process involved in the present invention is more streamlined, requires fewer equipment, and can be processed by all processing factories in the industry with the ability to process basic parts. The part processing cost is relatively low, and the part processing time cycle is relatively short.

[0021] Through the cooperation of structures such as the stop ring, the anti-icing stator blade cylinder, and the semi-circular cross-section plug, the present invention realizes the high-precision cooperation of the main parts and effectively controls the position accuracy of the air pipeline interface inside the anti-icing stator blade. It can more effectively ensure the anti-icing ability.

[0022] Although the present invention includes 6 main parts, as long as the connection structure 6 is disassembled, the disassembly of the entire anti-icing stator ring can be completed. When an anti-icing stator blade is damaged, it can be quickly repaired by replacing the anti-icing stator blade, improving the repair efficiency. When a certain blade on the traditional anti-icing stator ring is damaged, the entire part needs to be scrapped and replaced with a new one, while the present invention only needs to scrap and replace 1 anti-icing stator blade, and the maintenance cost is 1 / 20 of the original. The present invention has been applied to turboprop engines. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of an embodiment of the present invention

[0024] Figure 2 It is a schematic (A-A) structural diagram of an embodiment of the present invention;

[0025] Figure 3 It is a schematic (B-B) structural diagram of an embodiment of the present invention;

[0026] 1 - front outer ring, 2 - rear outer ring, 3 - stop ring, 4 - anti-icing stator blade, 5 - inner ring, 6 - connection structure. Detailed Embodiments

[0027] To make the objectives, technical solutions, and advantages of the implementation of the present invention clearer, the following will describe the technical solutions in the embodiments of the present invention in more detail in combination with the embodiments of the present invention. In the examples, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are some, but not all, of the embodiments of the present invention. The following exemplary embodiments described by reference are intended to explain the present invention and should not be construed as limiting the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention. The following will be described in detail in combination with the embodiments of the present invention.

[0028] In this application example, the connection structure 6 specifically adopts the form of a stud, a nut, and a lock washer. The nut is installed in a specially designed groove, which does not affect the cooperation of the entire stator ring with other parts. A high-temperature air pipeline is provided inside each anti-icing stator vane. The pipe orifice near the outer diameter of the stator ring is the high-temperature air inlet, and the position accuracy of this inlet is controlled relatively precisely, effectively ensuring the fluidity of the high-temperature air, that is, ensuring the anti-icing effect. An internal pipeline flow inspection test needs to be carried out on each new or repaired anti-icing stator vane. Unqualified vanes need to be scrapped and replaced with new ones. The detachable structure makes the repair of the stator ring extremely convenient.

[0029] The stator vane 4 is clamped together with the front outer ring 1, the rear outer ring 2, the stop ring 3, and the inner ring 5 through a mating structure. The entire anti-icing stator ring is locked into a whole by tightening the connection structure 6. Threaded holes for connecting with mating parts are provided inside the inner ring 5.

[0030] Core invention points: By adopting a specially designed structural form, the anti-icing stator ring vanes and the inner and outer rings can be assembled together simply and quickly, and the anti-icing stator vanes can also be disassembled and replaced simply and quickly. At the same time, it is ensured that the inner and outer rings are still the most stable integral ring structures. During the entire processing process, high-temperature processing procedures that may cause part deformation are not introduced, the position accuracy of the air pipeline interfaces inside the stator ring is ensured, and the overall structure is simple and has high processability.

[0031] Secondary invention points: The fixing of the installation angle of the anti-icing stator vane is achieved by inserting a first plug with a semicircular cross-section on the vane into a semicircular hole. The semicircular hole is formed by the cooperation of the front outer ring with a semicircular notch and the stop ring with a flat mating position. The entire fixing and positioning structure can be realized without using any special-shaped holes or structures, and the part processing processability is high.

[0032] 3 Minor inventive points: The anti-icing stator vane relies on the cylindrical second plug to cooperate with and be limited by the inner ring. The front outer ring and the rear outer ring rely on the rabbet and the pin to cooperate with and be limited by each other. The anti-icing stator vane relies on the first plug with a semi-circular cross-section to cooperate with and be limited by the front outer ring, the rear outer ring, and the stop ring. Finally, except for the stop ring and the front outer ring, all other parts are limited in position by the clamping form.

[0033] 4 Minor inventive points: The upper and lower sides of the anti-icing stator vane are provided with a first plug with a semi-circular cross-section and a cylindrical second plug, which provides an accurate reference for the machining process and improves the machining processability and measurement accuracy of the vane.

[0034] 5 Minor inventive points: Different from the common semi-circular stator ring, the inner ring, the front outer ring, the rear outer ring, and the stop ring in the entire assembly structure of the present invention are all integral rings, which can effectively maintain the stiffness of the parts and prevent deformation during the machining or assembly process of the parts.

[0035] 6 Minor inventive points: The machining methods of the anti-icing stator vane, the inner ring, the front outer ring, the rear outer ring, and the stop ring are all mechanical machining on the basis of the blank. Each part is assembled together at normal temperature. There is no high-temperature process that will cause uncontrollable deformation of the parts during the entire machining process of the anti-icing stator ring, such as welding.

[0036] 7 Minor inventive points: The main process involved in the traditional anti-icing stator ring is: blank preparation - machining (involving airfoil machining, conventional cylinder, round hole, plane machining, airfoil hole machining) - welding - shape correction - machining. It can only be processed by a processing factory with welding capabilities. The main structures of the present invention are all conventional structures, and the main process it involves is: blank preparation - machining (involving airfoil machining, conventional cylinder, round hole, plane machining) - assembly. The process involved in the present invention is more concise, requires fewer equipment, and can be processed by all processing factories with basic part processing capabilities in the industry. The processing cost of the parts is relatively low, and the processing time cycle of the parts is relatively short.

[0037] Embodiment

[0038] The structure of the high-processability detachable anti-icing stator ring is as Figure 1 、 Figure 2As shown in the figure, it includes a front outer ring 1, a rear outer ring 2, a stop ring 3, an anti-icing stator vane 4, an inner ring 5, and a connection structure 6. On the side of the anti-icing stator vane 4 away from the axis, there is a first plug with a semi-circular cross-section. Inside the anti-icing stator vane 4, there is an air pipeline, whose inlet is located at the first plug to achieve connection with the hot air supply pipe, and the outlet is located on the side of the anti-icing stator vane 4 close to the axis; in front of the first plug, there is a front outer ring 1, and behind the first plug, there are respectively a rear outer ring 2 and a stop ring 3. The rear outer ring 2 is in clearance fit with the first plug, the stop ring 3 is in clearance fit with the rear outer ring 2, and the front outer ring 1 and the stop ring 3 jointly form a profile surface adapted to the first plug and are fixed through the connection structure 6, thereby realizing the restraint of the anti-icing stator vane 4; the surfaces of the front outer ring 1 and the rear outer ring 2 close to the axis jointly form the outer flow path of the anti-icing stator ring; on the side of the anti-icing stator vane 4 close to the axis, there is a cylindrical second plug, and on the inner ring 5, there is a circular groove adapted to the shape of the second plug. The surface of the inner ring 5 away from the axis is the inner flow path of the anti-icing stator ring, and on the inner ring, there are mounting holes for connecting with the upstream components of the engine. A number of anti-icing stator vanes 4 form an annular anti-icing stationary ring through connection with the front outer ring 1, the rear outer ring 2, the stop ring 3, and the inner ring 5.

[0039] In a certain embodiment of the present invention, the material of the front outer ring 1 is ZL105A, with a low material density and the strength meeting the usage requirements.

[0040] In a certain embodiment of the present invention, the material of the rear outer ring 2 is ZL105A, with a low material density and the strength meeting the usage requirements.

[0041] In a certain embodiment of the present invention, the material of the stop ring 3 is ZL105A, with a low material density and the strength meeting the usage requirements.

[0042] In a certain embodiment of the present invention, both the rear outer ring 2 and the stop ring 3 are provided with weight-reducing grooves.

[0043] In a certain embodiment of the present invention, the material of the anti-icing stator vane 4 is ZGCr17Ni2 (added with Cu), which is suitable for machining of casting blanks, including that the main part of the internal hot air pipeline is suitable for machining by casting, and the inlet and outlet are machined by machining.

[0044] In a certain embodiment of the present invention, the material of the inner ring 5 is LY11, with a low material density and the strength meeting the usage requirements.

[0045] In a certain embodiment of the present invention, the connection form of the connection structure 6 depends on different application scenarios. A stud-nut-lock washer structure can be adopted, which has the advantage of low manufacturing cost and is suitable for situations with sufficient space. A stud and self-locking nut structure can be adopted, which is suitable for the situation where the front outer ring does not support the embedding of the lock washer. A locking wire thread insert-bolt structure can be adopted, which is suitable for situations with sufficient space. A locking wire thread insert-screw structure can be adopted, which is suitable for situations with narrow space.

[0046] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of this application should have the ordinary meaning understood by those of ordinary skill in the art to which this application belongs. The words indicating directions such as "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer", etc. used in the description of this application are only used to indicate relative directions or position relationships, rather than implying that the device or component must have a specific orientation, be constructed and operated in a specific orientation. When the absolute position of the object being described changes, its relative position relationship may also change accordingly. Therefore, it should not be construed as a limitation to this application. The terms "first", "second", "third", and similar terms used in the description of this application are only for descriptive purposes to distinguish different components and cannot be construed as indicating or implying relative importance. The words "a", "one", or "the" and similar terms used in the description of this application should not be construed as an absolute limitation on the quantity, but should be understood to mean at least one. The terms "including" or "comprising" and similar terms used in the description of this application are intended to mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects.

[0047] In addition, it should be noted that, unless otherwise clearly specified and limited, the similar terms such as "installed", "connected", and "joined" used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can also be the communication inside two components. Those skilled in the art can understand its specific meaning in this application according to specific circumstances.

[0048] The above are only specific embodiments of the present invention and are not used to limit the present invention. Any person skilled in the art may, within the spirit and principle of the present invention, use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention, any modification, equivalent replacement, improvement, etc., shall be included within the protection scope of the present invention.

Claims

1. A detachable anti-icing stator ring, characterized in that: It includes a front outer ring, a rear outer ring, a stop ring, anti-icing stator blades, an inner ring, and a connecting structure; A first plug with a semicircular cross-section is provided on the side of the anti-icing stator blade away from the axis, and an air pipeline is provided inside the anti-icing stator blade, the inlet of which is located at the first plug to achieve communication with the hot air supply pipe, and the outlet is located on the side of the anti-icing stator blade close to the axis; a front outer ring is provided on the front side of the first plug, and a rear outer ring and a stop ring are provided on the rear side of the first plug, respectively, the rear outer ring and the first plug are clearance fit, the stop ring and the rear outer ring are clearance fit, the front outer ring and the stop ring together form a profile adapted to the first plug, and are connected The structure is fixed, thereby realizing the constraint on the anti-icing stator blades; the front outer ring and the rear outer ring close to the axis surface together constitute the outer flow channel of the anti-icing stator ring; the anti-icing stator blade is provided with a cylindrical second plug on the side close to the axis, and the inner ring is provided with a circular groove matched with the shape of the second plug, the inner ring away from the axis surface is the inner flow channel of the anti-icing stator ring, the inner ring is provided with a mounting hole connected with the upstream components of the engine, and a number of anti-icing stator blades are connected with the front outer ring, the rear outer ring, the stop ring and the inner ring to form a circular anti-icing stationary ring.

2. The stator ring according to claim 1, characterized in that: The material of the front outer ring is ZL105A.

3. The stator ring according to claim 1, characterized in that: The material of the rear outer ring is ZL105A.

4. The stator ring according to claim 1, characterized in that: The material of the stop ring is ZL105A.

5. The stator ring according to claim 1, characterized in that: The rear outer ring and the stop ring are both provided with weight-reducing grooves.

6. The stator ring according to claim 1, characterized in that: Pins are used to limit the front outer ring and the rear outer ring in the circumferential direction.

7. The stator ring according to claim 1, characterized in that: The anti-icing stator blades are made of ZGCr17Ni2 and are cast blanks. The main part of the internal hot air pipeline is processed by casting, and the inlet and outlet are machined.

8. The stator ring according to claim 1, characterized in that: The inner ring material is LY11.

9. The stator ring according to claim 1, characterized in that: The connection form of the connection structure is determined according to different application scenarios, and adopts different specific forms such as screw pile-nut-locking plate, screw pile, self-locking nut, locking wire screw sleeve-bolt, and locking wire screw sleeve-screw.

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