Adjustable blade swing mechanism, engine and application of adjustable blade swing mechanism
By designing an adjustable blade swing mechanism including outer receiver, middle receiver, inner receiver, driver, connecting shaft, static vane, synchronization ring and rocker arm assembly, the problem of many parts of variable geometric turbine adjustment mechanism and poor airflow circulation capacity is solved, and the engine volume reduction and airflow circulation capacity are achieved.
Patent Information
- Application Number
- CN202510025125.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2025-05-06
AI Technical Summary
In the prior art, variable geometric turbine adjustment mechanisms have problems with large numbers of parts and poor circulation capacity of external culvert airflow.
An adjustable blade swing mechanism is designed, including an outer receiver, a middle receiver, an inner receiver, a driver, a connecting shaft, a static vane, a synchronization ring and a rocker arm assembly. The power of the driver is transmitted directly to the static vane through the connecting shaft, or through the rocker arm assembly and the synchronization ring, the static vane rotates after being driven to adjust the engine operating state.
It effectively reduces the number of parts, reduces the engine volume, improves the airflow circulation capacity of the outer culvert, and solves the problem of many parts and poor airflow circulation capacity of the variable geometric turbine adjustment mechanism.
Smart Images
Figure CN119933810A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of aero-engines, and in particular relates to an adjustable blade swing mechanism, an engine and applications thereof. Background Art
[0002] With the rapid development of aviation engines, especially the continuous improvement of performance requirements for military fighters, advanced fighters are required to switch back and forth between various speeds to cope with changing environments. Among them, the variable geometry turbine is an important component of the variable cycle engine. The effective turbine flow regulation method is to change the stator installation angle, that is, to adjust the throat area by changing the installation angle, thereby changing the engine bypass ratio, so as to achieve the purpose of adjusting the engine working state, so that the engine can have a higher thermal efficiency in a wider flight range, and improve the transient response characteristics of the engine such as acceleration and deceleration and fuel consumption rate.
[0003] In the prior art, the research on variable geometry turbine adjustment mechanism mainly focuses on the traditional linkage ring drive scheme. This scheme has a large number of parts, which increases the difficulty of disassembly and assembly on the one hand, and increases the overall space occupancy of the mechanism on the other hand, reducing the external airflow flow capacity.
[0004] Therefore, developing an adjustable blade swing mechanism, an engine and its application to solve the technical defects of the variable geometry turbine adjustment mechanism in the prior art, such as the large number of parts and the poor external airflow flow capacity, has become an urgent problem to be solved by technical personnel in this field. Summary of the invention
[0005] Based on this, it is necessary to provide an adjustable blade swing mechanism, an engine and its application to address the technical defects of the variable geometry turbine adjustment mechanism in the existing technology, such as the large number of parts and the poor flow capacity of the external airflow.
[0006] The present application provides an adjustable blade swing mechanism, which comprises: an outer casing, a middle casing, an inner casing, a driver, a connecting shaft, a plurality of stator blades, a synchronizing ring and a rocker arm assembly;
[0007] The outer casing, the middle casing, and the inner casing are sequentially arranged from outside to inside to form an outer channel and an inner channel, the synchronizer ring and the rocker arm assembly are arranged in the outer channel, and the stator blades are arranged in the inner channel;
[0008] The driver is arranged outside the outer casing and connected to one end of the connecting shaft, and the other end of the connecting shaft passes through the middle casing and is connected to one of the stator blades to drive the stator blade to rotate;
[0009] The connecting shaft is connected to the rocker arm assembly, the rocker arm assembly is connected to a synchronizing ring, and the synchronizing ring is connected to the remaining stator blades.
[0010] In one of the embodiments, the adjustable blade swing mechanism further includes: a synchronizer ring support assembly, the synchronizer ring support assembly is mounted on the middle casing, and the synchronizer ring is mounted on the synchronizer ring support assembly.
[0011] In one of the embodiments, the synchronizer ring support assembly includes: a fixed slide groove and a sliding block, the sliding block is connected to the synchronizer ring, the fixed slide groove is installed on the middle casing, and the sliding block slides in the fixed slide groove.
[0012] In one embodiment, the number of the drivers is 3, the 3 drivers are evenly distributed along the circumference of the outer casing, and the connecting shafts are connected to the drivers one by one.
[0013] In one of the embodiments, the adjustable blade swing mechanism further includes: a torque sensor, and the torque sensor is installed on the connecting shaft.
[0014] In one embodiment, the rocker arm assembly includes: a rocker arm, a shaft pin and a roller;
[0015] One end of the rocker arm is connected to the stator blade, and the other end of the rocker arm is in contact with the synchronization ring through a roller, and the shaft pin connects the roller and the rocker arm.
[0016] In one of the embodiments, the number of the synchronizer ring support assemblies is 3 to 6 groups, and the synchronizer ring support assemblies are evenly distributed along the circumference of the middle casing.
[0017] In one embodiment, the stator blade comprises: a blade body, a first bushing and a second bushing;
[0018] The first bushing is fixed to the outer side surface of the inner casing, the second bushing is fixed to the inner side surface of the middle casing, and two ends of the blade body are respectively inserted into the first bushing and the second bushing.
[0019] The present application also provides an engine, which includes the adjustable blade swing mechanism described in any one of the above.
[0020] The present application also provides an application of the adjustable blade swing mechanism or the engine described above in the field of aviation aircraft.
[0021] In summary, the present application provides an adjustable blade swing mechanism, including: an outer casing, a middle casing, an inner casing, a driver, a connecting shaft, a plurality of stator blades, a synchronizing ring and a rocker assembly; the driver is connected to one end of the connecting shaft, and the other end of the connecting shaft passes through the middle casing and is connected to one of the stator blades to drive the stator blade to rotate; the connecting shaft is connected to the rocker assembly, the rocker assembly is connected to the synchronizing ring, and the synchronizing ring is connected to the remaining stator blades. The present application also provides an engine including the above-mentioned adjustable blade swing mechanism, and the present application also provides an application of the above-mentioned adjustable blade swing mechanism or the above-mentioned engine in the field of aviation aircraft. In the technical solution provided by the present application, the driver is directly transmitted to the stator blades through the connecting shaft, or is transmitted to the stator blades through the rocker assembly and the synchronizing ring, and the stator blades rotate after being driven, which has the effect of adjusting the working state of the engine; the adjustable blade swing mechanism provided by the present application has a simple structure, which solves the technical defects of the variable geometry turbine adjustment mechanism in the prior art, such as a large number of parts and poor flow capacity of the outer airflow. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.
[0023] Figure 1 A schematic diagram of the structure of an adjustable blade swing mechanism in the technical solution provided in the embodiment of the present application;
[0024] Figure 2 A partially enlarged schematic diagram of a connection structure between a stator blade and a connecting shaft in an adjustable blade swing mechanism provided in an embodiment of the present application;
[0025] Figure 3 A partially enlarged schematic diagram of a synchronizer ring support assembly in an adjustable blade swing mechanism provided in an embodiment of the present application;
[0026] Figure 4 A schematic structural diagram of a rocker arm assembly in an adjustable blade swing mechanism provided in an embodiment of the present application;
[0027] Figure 5 A schematic structural diagram of a synchronization ring in an adjustable blade swing mechanism provided in an embodiment of the present application;
[0028] Figure 6 A schematic structural diagram of a stator blade in an adjustable blade swing mechanism provided in an embodiment of the present application;
[0029] Figure 7 A schematic structural diagram of an inner casing in an adjustable blade swing mechanism provided in an embodiment of the present application;
[0030] Figure 8 A schematic structural diagram of a middle casing in an adjustable blade swing mechanism provided in an embodiment of the present application;
[0031] Among them, there are a driver 1, a connecting shaft 2, a rocker arm assembly 3, an outer casing 4, a synchronizer ring 5, a synchronizer ring support assembly 6, a middle casing 7, stator blades 8, an inner casing 9, a first bushing 10, a second bushing 11, a first gasket 12, a nut 13, a second gasket 14, a rocker arm 15, a shaft pin 16, a roller 17, a slider 18 and a fixed slide groove 19. DETAILED DESCRIPTION
[0032] The embodiments of the present application provide an adjustable blade swing mechanism, an engine and applications thereof, which are used to solve the technical defects of the variable geometry turbine adjustment mechanism in the prior art, such as a large number of parts and poor external airflow flow capacity.
[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0036] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0037] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.
[0039] See also Figures 1 to 8 The embodiment of the present application provides an adjustable blade swing mechanism, including: an outer casing 4, a middle casing 7, an inner casing 9, a driver 1, a connecting shaft 2, a plurality of stator blades 8, a synchronizer ring 5 and a rocker arm assembly 3; the outer casing 4, the middle casing 7 and the inner casing 9 are sequentially arranged from the outside to the inside to form an outer duct channel and an inner duct channel, the synchronizer ring 5 and the rocker arm assembly 3 are arranged in the outer duct channel, and the stator blade 8 is arranged in the inner duct channel; the driver 1 is arranged on the outside of the outer casing 4 and connected to one end of the connecting shaft 2, and the other end of the connecting shaft 2 passes through the middle casing 7 and is connected to one of the stator blades 8 to drive the stator blade 8 to rotate; the connecting shaft 2 is connected to the rocker arm assembly 3, the rocker arm assembly 3 is connected to the synchronizer ring 5, and the synchronizer ring 5 is connected to the remaining stator blades 8.
[0040] In the adjustable blade swing mechanism provided in the embodiment of the present application, the gap between the outer casing 4 and the middle casing 7 forms an outer channel, and the gap between the middle casing 7 and the inner casing forms an inner channel. The outer channel and the inner channel together constitute the main working environment of the various components of the adjustable blade swing mechanism. Among them, the stator blade 8 is arranged in the inner channel, and part (or one piece) of the stator blade 8 is connected to the driver 1 through the connecting shaft 2 that passes through the outer channel, and the remaining stator blades 8 are connected to the rocker assembly 3 through the synchronization ring 5. The rocker assembly 3 cannot receive power from the driver 1 through the connecting shaft 2.
[0041] In the adjustable blade swing mechanism provided in the embodiment of the present application, the driver 1 drives the stator blade 8 in two ways. Under the driving action of the driver 1, the stator blade 8 rotates. Through the rotation of the stator blade 8, the direction, speed and pressure of the airflow are guided and controlled to achieve the function of adjusting the speed. One of the driving modes is direct drive, and the two ends of the connecting shaft 2 are respectively connected to the driver 1 and the stator blade 8, and the power of the driver 1 directly drives the stator blade 8 to rotate through the connecting shaft 2. In order to reduce the volume of the adjustable blade swing mechanism and facilitate application, in the technical solution provided in the embodiment of the present application, another driving mode for the rotation of the stator blade 8 is: driving through the rocker arm assembly 3 and the synchronizer ring 5. One end of the rocker arm assembly 3 is connected to the connecting shaft 2, and the rocker arm assembly 3 and the synchronizer ring 5 are in friction contact. After the rocker arm assembly 3 transmits the power from the connecting shaft 2 to the synchronizer ring 5, the synchronizer ring 5 and the remaining stator blades 8 are connected through splines for power transmission, driving the remaining stator blades 8 to rotate.
[0042] The adjustable blade swing mechanism provided in the embodiment of the present application greatly reduces the use of the driver 1 through direct drive and indirect drive, and the number of parts is effectively reduced. Under the premise of achieving the angle adjustment of the stator blades 8, the volume of the adjustable blade swing mechanism is greatly reduced. At the same time, due to the reduction in the number of parts, the impact on the airflow is further effectively reduced; the technical defects of the variable geometry turbine adjustment mechanism in the prior art, such as the large number of parts and the poor external airflow circulation capacity, are solved.
[0043] The adjustable blade swing mechanism provided in the embodiment of the present application can be installed in the engine, effectively reducing the size of the engine; both can be widely used in aircraft, realizing small-volume multi-speed switching and improving the performance of aircraft.
[0044] In the process of actual application, in order to facilitate the installation and debugging of the adjustable blade swing mechanism, the inner casing 9 can be a two-section spliced structure, and the spliced structure is connected through the end face flange.
[0045] In order to effectively ensure that the gap between the blade root and the blade tip of the stator blade 8 does not change during the rotation of the stator blade 8, the flow path surface of the inner channel formed between the middle casing 7 and the inner casing 9 is a spherical end wall.
[0046] In the actual design of the adjustable blade swing mechanism, different numbers of stator blades 8 can be designed according to actual design requirements. Usually, the number of stator blades 8 can be between 18 and 24. This is only a simple description of one of the technical solutions and does not constitute a limitation on the number of stator blades 8.
[0047] On the basis of ensuring that the driver 1 can adjust the angle of the stator blades 8, the angle adjustment effect of the driver 1 is effectively optimized, and the number of drivers 1 is reduced to reduce the volume of the adjustable blade swing mechanism. In the technical solution provided in the embodiment of the present application, the number of drivers 1 is 3, and the 3 drivers 1 are evenly distributed along the circumference of the outer casing 4, and the connecting shaft 2 is connected to the driver 1 one by one.
[0048] To further optimize the technical solution, in order to achieve the centering of the synchronizer ring 5 and ensure that the synchronizer ring 5 can swing the adjustable blades, the mechanism also includes: a synchronizer ring support assembly 6, the synchronizer ring support assembly 6 is installed on the middle casing 7, and the synchronizer ring 5 is installed on the synchronizer ring support assembly 6.
[0049] To further optimize the technical solution, on the basis of ensuring the centering effect of the synchronizer ring support assembly 6 on the synchronizer ring 5, the number of synchronizer ring support assemblies 6 is reduced to simplify the blade swing mechanism and reduce the volume. In the technical solution provided in the embodiment of the present application, the number of synchronizer ring support assemblies 6 is 3 to 6 groups, and the synchronizer ring support assemblies 6 are evenly distributed along the circumference of the middle casing 7.
[0050] See further here Figure 3 The synchronizer ring support assembly 6 includes: a fixed slide 19 and a slider 18. The slider 18 is connected to the synchronizer ring 5. The fixed slide 19 is installed on the middle casing 7. The slider 18 slides in the fixed slide 19. The fixed slide 19 is fixed to the middle casing 7 by screws. The slider 18 is connected to the synchronizer ring 5 by two screws (a first screw and a second screw). The first screw is threadedly matched with the synchronizer ring 5, and the second screw is threadedly matched with the slider 18. The first screw supports the slider 18 to enlarge the gap between the slider 18 and the synchronizer ring 5. The second screw tightens the slider 18 to reduce the gap between the slider 18 and the synchronizer ring 5. The slider 18 slides in the fixed slide 19 to adjust the gap between the slider 18 and the synchronizer ring 5.
[0051] To further optimize the technical solution, in order to effectively improve the working stability of the adjustable blade swing mechanism and to be able to intervene immediately when a working abnormality occurs, the adjustable blade swing mechanism provided in the embodiment of the present application also includes: a torque sensor, which is installed on the connecting shaft 2. The torque sensor monitors the working condition of the connecting shaft 2, and sends a signal in real time when an abnormality occurs, which is convenient for the operator to handle, thereby improving the working stability of the adjustable blade swing mechanism.
[0052] In the technical solution provided in the embodiment of the present application, the rocker arm assembly 3 includes: a rocker arm 15, a shaft pin 16 and a roller 17; one end of the rocker arm 15 is connected to the stator blade 8, the other end of the rocker arm 15 is in contact with the synchronizer ring 5 through the roller 17, and the shaft pin 16 connects the roller 17 and the rocker arm 15. In the specific design, one end of the rocker arm 15 can be designed as a spline form, which effectively reduces the problem of reduced installation angle adjustment accuracy caused by wear of the matching surface of the crank and the blade shaft after a certain period of repeated movement. The other end of the rocker arm 15 and the pin shaft adopt an interference fit shaft hole to reduce the influence of the matching clearance on the accuracy. The roller 17 and the pin shaft are matched through a clearance shaft hole to ensure that the roller 17 can roll smoothly.
[0053] See further here Figure 2 In the technical solution provided in the embodiment of the present application, the stator blade 8 includes: a blade body, a first bushing 10 and a second bushing 11; the first bushing 10 is fixed to the outer side of the inner casing 9, the second bushing 11 is fixed to the inner side of the middle casing 7, and the two ends of the blade body are respectively inserted into the first bushing 10 and the second bushing 11. The stator blade 8 is a double-pivot structure, the upper fulcrum is the upper end of the blade body and the second bushing 11 cooperate, the lower fulcrum is the lower end of the blade body and the first bushing 10 cooperate, and the power transmitted by the connecting shaft 2 drives the upper fulcrum of the blade body to rotate through the second bushing 11.
[0054] exist Figure 2 In the partially enlarged schematic diagram, the connecting shaft 2 passes through the outer culvert channel, and the contact surfaces of the connecting shaft 2, the middle casing 7 and the outer casing 4 are respectively provided with a first gasket 12 and a second gasket 14. The first gasket 12 and the second gasket 14 can effectively prevent the connecting shaft 2 from slipping during the transmission process. The connecting shaft 2 passes through the nut 13, and the first gasket 12 and the second gasket 14 are clamped by the nut 13 with the middle casing 7 and the outer casing 4 respectively, thereby fixing the first gasket 12 and the second gasket 14.
[0055] In summary, the present application provides an adjustable blade swing mechanism, including: an outer casing, a middle casing, an inner casing, a driver, a connecting shaft, a plurality of stator blades, a synchronizing ring and a rocker assembly; the driver is connected to one end of the connecting shaft, and the other end of the connecting shaft passes through the middle casing and is connected to one of the stator blades to drive the stator blade to rotate; the connecting shaft is connected to the rocker assembly, the rocker assembly is connected to the synchronizing ring, and the synchronizing ring is connected to the remaining stator blades. The present application also provides an engine including the above-mentioned adjustable blade swing mechanism, and the present application also provides an application of the above-mentioned adjustable blade swing mechanism or the above-mentioned engine in the field of aviation aircraft. In the technical solution provided by the present application, the driver is directly transmitted to the stator blades through the connecting shaft, or is transmitted to the stator blades through the rocker assembly and the synchronizing ring, and the stator blades rotate after being driven, which has the effect of adjusting the working state of the engine; the adjustable blade swing mechanism provided by the present application has a simple structure, which solves the technical defects of the variable geometry turbine adjustment mechanism in the prior art, such as a large number of parts and poor flow capacity of the outer airflow.
[0056] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. At the same time, other implementation methods can be derived from the above-mentioned embodiments, so that structural and logical replacements and changes can be made without departing from the scope of this disclosure.
[0057] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.
Claims
1. An adjustable blade swing mechanism, characterized in that: The adjustable blade swing mechanism comprises: an outer casing, a middle casing, an inner casing, a driver, a connecting shaft, a plurality of stator blades, a synchronizing ring and a rocker arm assembly; The outer casing, the middle casing, and the inner casing are sequentially arranged from outside to inside to form an outer channel and an inner channel, the synchronizer ring and the rocker arm assembly are arranged in the outer channel, and the stator blades are arranged in the inner channel; The driver is arranged outside the outer casing and connected to one end of the connecting shaft, and the other end of the connecting shaft passes through the middle casing and is connected to one of the stator blades to drive the stator blade to rotate; The connecting shaft is connected to the rocker arm assembly, the rocker arm assembly is connected to a synchronizing ring, and the synchronizing ring is connected to the remaining stator blades.
2. The adjustable blade swing mechanism according to claim 1, characterized in that: The adjustable blade swing mechanism further includes: a synchronization ring support assembly, the synchronization ring support assembly is mounted on the middle casing, and the synchronization ring is mounted on the synchronization ring support assembly.
3. The adjustable blade swing mechanism according to claim 2, characterized in that: The synchronizer ring support assembly comprises: a fixed slide groove and a sliding block, the sliding block is connected to the synchronizer ring, the fixed slide groove is installed on the middle casing, and the sliding block slides in the fixed slide groove.
4. The adjustable blade swing mechanism according to any one of claims 1 to 3, characterized in that: The number of the drivers is 3, and the 3 drivers are evenly distributed along the circumference of the outer casing. The connecting shafts are connected to the drivers in a one-to-one correspondence.
5. The adjustable blade swing mechanism according to claim 1, characterized in that: The adjustable blade swing mechanism further includes: a torque sensor, which is mounted on the connecting shaft.
6. The adjustable blade swing mechanism according to any one of claims 1 to 3, characterized in that: The rocker arm assembly comprises: a rocker arm, a shaft pin and a roller; One end of the rocker arm is connected to the stator blade, and the other end of the rocker arm is in contact with the synchronization ring through a roller, and the shaft pin connects the roller and the rocker arm.
7. The adjustable blade swing mechanism according to claim 2 or 3, characterized in that: The number of the synchronizer ring support assemblies is 3 to 6 groups, and the synchronizer ring support assemblies are evenly distributed along the circumference of the middle casing.
8. The adjustable blade swing mechanism according to claim 1, characterized in that: The stator blade comprises: a blade body, a first bushing and a second bushing; The first bushing is fixed to the outer side surface of the inner casing, the second bushing is fixed to the inner side surface of the middle casing, and two ends of the blade body are respectively inserted into the first bushing and the second bushing.
9. An engine, characterized in that: The engine comprises the adjustable blade swing mechanism according to any one of claims 1 to 8.
10. Use of the adjustable blade swing mechanism according to any one of claims 1 to 8 or the engine according to claim 9 in the field of aviation vehicles.