Aero-engine fan adjustable stator blade angle adjusting and fixing structure

Abstract

The application belongs to the technical field of aero-engine test, and particularly relates to an aero-engine fan adjustable stator blade angle adjusting and fixing structure, which comprises: a plurality of angle gauge block front sections connected to a fan casing by means of pins; a plurality of angle gauge block rear sections connected to each angle gauge block front section in a toothed meshing mode, and provided with notches; each notch is clamped on the flat head of the neck of each fan adjustable stator blade, so as to fix the angle of each fan adjustable stator blade; and a plurality of gaskets are fastened on the neck of each fan adjustable stator blade by means of nuts, and press the toothed meshing connection part between each angle gauge block front section and angle gauge block rear section.

Description

Technical Field

[0001] This application belongs to the field of aero-engine testing technology, specifically relating to an adjustable stator blade angle adjustment and fixing structure for an aero-engine fan. Background Technology

[0002] Aero-engine testing involves fixing the adjustable stator blade angles of the fan. Currently, the most common method is to use angle gauges to adjust the angles of each adjustable stator blade before fixing it.

[0003] The current angle gauge block has notches at both ends. The front notch is engaged with a locating pin connected to the fan casing, and the rear notch is engaged with the flat end of the journal on the adjustable stator blade of the fan. This technical solution has the following drawbacks:

[0004] Each type of angle gauge block can only fix the adjustable stator blades of the fan at a specific angle. In aero-engine experiments, it is necessary to adjust and fix the adjustable stator blades of the fan at multiple angles. Therefore, a wide variety of angle blocks need to be designed for fixing. In addition, there are a large number of adjustable stator blades of the fan. When fixing the angles with different types of angle gauge blocks, the disassembly and assembly process of a large number of different types of angle gauge blocks is time-consuming, inefficient, and the shapes and sizes of different types of angle gauge blocks are similar, which can easily lead to confusion and incorrect use during disassembly and assembly.

[0005] This application is made in view of the aforementioned technical deficiencies.

[0006] It should be noted that the above background information is only used to assist in understanding the inventive concept and technical solution of this invention, and it does not necessarily belong to the prior art of this application. In the absence of clear evidence that the above information was disclosed on the filing date of this application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0007] The purpose of this application is to provide an adjustable stator blade angle adjustment and fixing structure for an aero-engine fan, so as to overcome or mitigate at least one of the known technical defects.

[0008] The technical solution of this application is:

[0009] An adjustable stator blade angle adjustment and fixing structure for an aircraft engine fan includes:

[0010] The front sections of multiple corner gauge blocks are connected to the fan housing with pins;

[0011] The rear section of multiple angle gauge blocks is connected to the front section of each angle gauge block by toothed meshing, and has notches; each notch is locked onto the flat head of the journal on each adjustable stator blade of the fan, so as to fix the angle of each adjustable stator blade of the fan.

[0012] Multiple gaskets are fastened to the upper journal of each fan adjustable stator blade by nuts, pressing the toothed meshing connection between the front and rear sections of each angle gauge block.

[0013] According to at least one embodiment of this application, in the above-mentioned adjustable stator blade angle adjustment and fixing structure for aero-engine fans, each angle gauge block has a scale marked on its front section.

[0014] Angle indicator lines at the rear of each corner gauge block;

[0015] The graduations indicated by the various angle indicator lines are consistent with the angles of the adjustable stator blades of the fixed fan at the front and rear sections of each angle gauge block.

[0016] According to at least one embodiment of this application, in the above-mentioned adjustable stator blade angle adjustment and fixing structure of the aero-engine fan, the fixed adjustable stator blade angle deflects by 1° for each tooth stagger between the front section and the rear section of the angle gauge block.

[0017] This application has at least the following beneficial technical effects:

[0018] This invention provides a structure for adjusting and fixing the angle of adjustable stator blades in an aero-engine fan. The design divides an existing angle gauge block into two sections: the front section is connected to the fan housing with a pin, and the rear section is notched and engages with the flat head of the journal on the adjustable stator blade via a toothed mesh, thus fixing the angle of the adjustable stator blade. When adjustment is needed, the front and rear sections of the angle gauge block are simply offset by the corresponding angle and reassembled. This process is convenient and quick. In aero-engine testing, it enables accurate and efficient adjustment and fixing of the angles of each adjustable stator blade, minimizing errors. Furthermore, the design incorporates a shim secured to the journal on the adjustable stator blade with a nut, which presses against the toothed mesh of the front and rear sections of the angle gauge block, effectively preventing them from disengaging and ensuring reliable fixing of the adjustable stator blade angle. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the adjustable stator blade angle adjustment and fixing structure of the aero-engine fan provided in the embodiments of this application;

[0020] Figure 2 This is a schematic diagram of the adjustable stator blade angle adjustment and fixing structure of the aero-engine fan provided in the embodiments of this application, which fixes the adjustable stator blade angle of the fan at 0°;

[0021] Figure 3This is a schematic diagram of the adjustable stator blade angle adjustment and fixing structure of the aero-engine fan provided in the embodiment of this application, which fixes the adjustable stator blade angle of the fan at +2°;

[0022] in:

[0023] 1-Front section of angle gauge block; 2-Fan housing; 3-Rear section of angle gauge block; 4-Adjustable stator blade of fan; 5-Gasket.

[0024] To better illustrate this embodiment, some parts in the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the actual size of the product. Furthermore, the drawings are for illustrative purposes only and should not be construed as limiting this application. Detailed Implementation

[0025] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain this application, not to limit this application. It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings. Other related parts can be referred to the general design. In the absence of conflict, the embodiments and technical features in the embodiments of this application can be combined with each other to obtain new embodiments.

[0026] Furthermore, unless otherwise defined, the technical or scientific terms used in this application description shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," and "outer," etc., used in this application description to indicate relative direction or positional relationship are used only to indicate relative orientation or positional relationship, and do not imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly, and therefore should not be construed as a limitation on this application. The terms "first," "second," "third," and similar terms used in this application description are used only for descriptive purposes to distinguish different components, and should not be construed as indicating or implying relative importance. The terms "a," "one," or "the," etc., used in this application description should not be construed as an absolute limitation on quantity, but should be construed as indicating the existence of at least one. The terms "including," "comprising," etc., used in this application description mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects.

[0027] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, terms such as “installation,” “connection,” and “linkage” used in the description of this application should be interpreted broadly. For example, a 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 a direct connection or an indirect connection through an intermediate medium; or it can be a connection within two components. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances.

[0028] The following is in conjunction with the appendix Figures 1 to 3 This application will be described in further detail.

[0029] An adjustable stator blade angle adjustment and fixing structure for an aircraft engine fan, as shown in the figure. Figure 1 As shown, it includes:

[0030] Multiple corner gauge blocks 1 are connected to the fan housing 2 by pins;

[0031] The rear section 3 of multiple angle gauge blocks is connected to the front section 1 of each angle gauge block by toothed meshing, and has notches; each notch is locked on the flat head of the journal of each adjustable stator blade 4 of the fan, so as to fix the angle of each adjustable stator blade 4 of the fan.

[0032] Multiple gaskets 5 are fastened to the upper journal of each fan adjustable stator blade 4 by nuts, pressing the toothed meshing connection between the front section 1 and the rear section 3 of each angle gauge block.

[0033] Regarding the adjustable stator blade angle adjustment and fixing structure for an aero-engine fan disclosed in the above embodiments, those skilled in the art will understand that its design divides the existing angle gauge block into two sections. The front section 1 of the angle gauge block is connected to the fan housing 2 by a pin, and the rear section 3 of the angle gauge block is notched and engages with the flat head of the journal on the adjustable stator blade 4 of the fan through toothed meshing, thus fixing the angle of the adjustable stator blade 4. When it is necessary to adjust and fix the angle of the adjustable stator blade 4, it is only necessary to offset the front section 1 and the rear section 3 of the angle gauge block by the corresponding angle and reassemble them. Figures 2-3 As shown, the whole process is convenient and quick. In aero-engine testing, it can achieve accurate and efficient adjustment and fixation of the four angles of each fan adjustable stator blade, and is not prone to errors.

[0034] Regarding the adjustable stator blade angle adjustment and fixing structure of the aero-engine fan disclosed in the above embodiments, those skilled in the art will understand that its design uses a shim 5 fastened to the upper journal of the adjustable stator blade 4 by a nut to press the toothed meshing connection between the front section 1 and the rear section 3 of the angle gauge block, which can effectively prevent the front section 1 and the rear section 3 of the angle gauge block from disengaging, and ensure reliable fixing of the angle of the adjustable stator blade 4.

[0035] In some optional embodiments, in the above-described adjustable stator blade angle adjustment and fixing structure for aero-engine fans, each angle gauge block has a scale marked on its front section 1.

[0036] Three angle indicator lines at the rear of each corner gauge block;

[0037] The scale indicated by each angle indicator line is consistent with the angle of the adjustable stator blade 4 of the fan fixed in the front section 1 and rear section 3 of each angle gauge block, so as to facilitate reading the fixed angle of the adjustable stator blade 4 of the fan and make it easy to adjust.

[0038] In some optional embodiments, in the above-mentioned adjustable stator blade angle adjustment and fixing structure of the aero-engine fan, for each offset tooth between the front section 1 and the rear section 3 of the angle gauge block, the fixed adjustable stator blade 4 of the fan deflects by 1°.

[0039] The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0040] The technical solution of this application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A fixed structure for adjusting and fixing the angle of adjustable stator blades of an aircraft engine fan, characterized in that, include: The front sections (1) of multiple corner gauge blocks are connected to the fan housing (2) by pins; The rear section (3) of multiple angle gauge blocks is connected to the front section (1) of each angle gauge block by toothed meshing, and has notches; each notch is locked on the flat head of the journal of each fan adjustable stator blade (4) so ​​as to fix the angle of each fan adjustable stator blade (4). Multiple gaskets (5) are fastened to the upper journal of each fan adjustable stator blade (4) by nuts, pressing the toothed meshing connection between the front section (1) and rear section (3) of each angle gauge block.

2. The adjustable stator blade angle adjustment and fixing structure for an aero-engine fan according to claim 1, characterized in that, Each corner gauge block has a scale marked on the front section (1); Angle indicator lines at the rear section (3) of each corner gauge block; The scales pointed to by the various angle indicator lines are consistent with the angles of the adjustable stator blades (4) of the fan fixed in the front section (1) and rear section (3) of each angle gauge block.

3. The adjustable stator blade angle adjustment and fixing structure for an aero-engine fan according to claim 1, characterized in that, For each tooth pattern that is staggered between the front section (1) and rear section (3) of each corner gauge block, the angle of the fixed adjustable stator blade (4) of the fan deflects by 1°.

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