Turbofan engine core hole exploring rack

Abstract

The utility model relates to a turbofan engine core engine hole detection rack which comprises a supporting frame, and the supporting frame comprises a main fulcrum structure and an auxiliary fulcrum structure. The main fulcrum structure is fixed to two main fulcrums at the end, away from the ground, of the supporting frame, and one ends of the main fulcrums are fixedly connected with a rotating shaft of a core engine of an engine. The auxiliary fulcrum structure comprises three auxiliary fulcrums which are sequentially distributed in the axial direction of the engine core engine. Compared with the prior art, the device has the advantages that the training time is easy to determine, the probability of damage to the probe of the borescope equipment is reduced, and the training effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of borescopes, in particular to a borescope stand for a turbofan engine core machine. Background Art

[0002] At present, with the development of the domestic civil aviation industry, the domestic civil aviation fleet is constantly expanding, and the workload of domestic civil aviation turbofan engine endoscopes (hereinafter referred to as "borescoping") has also increased. In addition, there are very few domestic borescope training institutions. Under this circumstance, the staff engaged in borescopes are becoming increasingly scarce, especially those with rich experience in borescope work. Therefore, the training of borescope staff is becoming more and more urgent.

[0003] Regarding borescope training, in addition to requiring specialized, expensive, and sophisticated borescope equipment, there are no dedicated engine teaching aids for use. Most training is conducted on in-service or disassembled engines, and the teaching time cannot be fixed. There are many types of engine damage, and the damage locations vary, making it impossible to comprehensively and objectively demonstrate them on the same engine. It takes time for trainees to understand and master this knowledge, and the time cost is invisibly increased in this situation. Furthermore, it is difficult for beginners to fully grasp the knowledge of engine damage types, and they are prone to incorrect use of borescope equipment in actual operations, which risks damaging the expensive, sophisticated borescope equipment, resulting in unnecessary increases in the economic costs of training or work.

[0004] How to achieve high efficiency in boresight training for civil aviation turbofan engine core machines has become a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of the present invention is to provide a turbofan engine core borehole probe stand in order to overcome the defects of the above-mentioned prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the present invention, a turbofan engine core machine borehole probe stand is provided, the stand comprising a support frame, the support frame comprising a main support structure and an auxiliary support structure;

[0008] The main support structure includes two main supports fixed to one end of the support frame away from the ground, and one end of the main support is fixedly connected to the engine core shaft;

[0009] The auxiliary support point structure includes three auxiliary support points distributed in sequence along the axial direction of the engine core.

[0010] Preferably, the main fulcrum is fixed to one end of the support frame away from the ground, and one end of the main fulcrum is fixedly connected to the engine core shaft for bearing the weight of the engine core.

[0011] Preferably, the platform further comprises an engine core machine shaft driving device, and the engine core machine shaft driving device is fixed on a horizontal platform at one end of the support frame away from the ground.

[0012] More preferably, the other end of one of the main fulcrums is connected to the engine core shaft drive device.

[0013] Preferably, the three auxiliary supporting points respectively bear the weight of the two ends and the middle of the turbofan engine core casing in the form of arcs.

[0014] More preferably, the arc shape of the auxiliary support point matches the contour of the engine core casing.

[0015] Preferably, the support frame includes an axial support arm of the engine core, and the support arm is fixed on the longitudinal frame of the support frame.

[0016] More preferably, the auxiliary supporting points on both sides are fixedly connected to the support arms.

[0017] Preferably, the middle auxiliary support point is height-adjustable and connected to a crossbeam of the support frame close to the ground along the axial direction of the engine core.

[0018] More preferably, the engine core shaft driving device is manually driven or motor driven.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The utility model designs multiple fulcrums to stabilize the engine core on the test bench, and training can be started at any time according to needs, which solves the problem of difficulty in determining the training time and improves the training effect.

[0021] The utility model controls the engine core machine shaft driving device to drive the engine to rotate, which can effectively reduce the possibility of damage to the borescope equipment probe due to rapid operation, and is also helpful for repeated inspection and confirmation of doubtful damage.

[0022] The utility model is designed with an adjustable auxiliary support point to firmly fix the engine core on the stand and avoid deformation caused by long-term suspension. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the engine core borehole probe stand of the utility model;

[0024] In the accompanying drawings, 1 is a support frame, 2 is a main fulcrum structure, 3 is an auxiliary fulcrum structure, 4 is an engine core shaft drive device, and 5 is a movable caster. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0026] This embodiment relates to a turbofan engine core machine borescope stand, which is used for borescope training and includes a support frame 1, an engine core machine shaft drive device 4 and movable casters 5.

[0027] The support frame 1 is the main structure, which adopts a combination of I-shaped and herringbone structures. The turbofan engine core is placed on the support frame 1. By designing the fulcrum, the engine core is prevented from being deformed due to being suspended in the air for a long time.

[0028] The support frame 1 includes an axial support arm 11 of the engine core, and the support arm 11 is fixed on the longitudinal frame of the support frame 1.

[0029] The upper end of the support frame 1 also includes a horizontal platform, and the engine core shaft driving device 4 is fixed on the horizontal platform.

[0030] The support frame 1 includes a main support structure 2 and an auxiliary support structure 3. The main support structure 2 is part of the main structure of the core engine borehole probe rig and includes two main supports. The two main supports are respectively fixed at the upper end of the support frame 1 and are connected to the engine core shaft. They are driven by the engine core shaft drive device 4 to achieve synchronous rotation with the engine shaft and are used to bear the weight of the engine core. The auxiliary support structure 3 is a derivative part of the main structure of the core engine borehole probe rig and includes three auxiliary supports distributed in sequence along the axial direction of the engine core, supporting the two ends and the middle of the engine core respectively. Each auxiliary support matches the contour of the engine core casing and bears the weight of the engine core casing in the form of a circular arc. The middle auxiliary support 31 is fixed to the crossbeam along the axial direction of the engine core at the bottom of the support frame 1. Its height is adjustable to adapt to the height of the engine core from the bottom of the support frame 1. The auxiliary supports on both sides are fixedly connected to the support arm 11.

[0031] The movable caster 5 is used for moving the core machine borehole probe stand when the site is transferred. The movable caster 5 adopts a fixable brake to facilitate the fixation of the stand.

[0032] The engine core shaft driving device 4 can be driven manually or by a motor to rotate the engine according to training needs.

[0033] According to the internal drive gear of the aviation turbofan engine, which rotates through the accessory gearbox and the shaft, the borescope equipment can be used to observe each blade of each stage of the engine core compressor and turbine, as well as the working conditions of the combustion chamber. By converting the accessory gearbox of the turbofan engine into an engine core shaft drive device, after scenario simulation, with a transmission ratio of 60:1 (the ratio of the engine core shaft drive device to the engine core rotation), the engine core can be effectively rotated forward and reversed, and the engine core can also be stopped at a desired position, so that the borescope personnel can conduct detailed and repeated inspections of questionable damage.

[0034] Since there are very few civil aviation turbofan engine borescope training institutions in China at present, there is no special teaching equipment bench designed for engine core borescope work. Borescope training is either conducted on replaced engines or when the aircraft is parked. The time and cycle of training cannot be determined. For this reason, we now assemble scrapped engine cores and design a set of special engine core borescope training benches for teaching use. Through the evaluation of the engine core shaft drive device, we choose the manual drive mode to reduce the possibility of damage to the borescope equipment. This equipment effectively solves the problem of training time and cycle. At the same time, the collected engine blades with various damage types can be easily installed on the core machine, so that trainees can more comprehensively understand and master the knowledge of engine damage types in a realistic scenario mode, thereby improving the training effect.

[0035] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A turbofan engine core borehole probe stand, characterized in that: The platform comprises a support frame (1), wherein the support frame (1) comprises a main support structure (2) and an auxiliary support structure (3); The main support structure (2) comprises two main supports fixed to an end of the support frame (1) away from the ground, one end of each main support being fixedly connected to the engine core shaft; The auxiliary support point structure (3) comprises three auxiliary support points distributed in sequence along the axial direction of the engine core.

2. A turbofan engine core borehole probe stand according to claim 1, characterized in that: The main fulcrum is fixed to one end of the support frame (1) away from the ground, and one end of the main fulcrum is fixedly connected to the engine core rotating shaft for bearing the weight of the engine core.

3. The turbofan engine core borehole probe stand according to claim 1, characterized in that: The platform further comprises an engine core machine shaft driving device (4), and the engine core machine shaft driving device (4) is fixed on a horizontal platform at one end of the support frame (1) away from the ground.

4. A turbofan engine core borehole probe stand according to claim 3, characterized in that: The other end of one of the main fulcrums is connected to the engine core shaft driving device (4).

5. The turbofan engine core borehole probe stand according to claim 1, characterized in that: The three auxiliary supporting points respectively bear the weight of the two ends and the middle of the turbofan engine core casing in the form of arcs.

6. The turbofan engine core borehole probe stand according to claim 5, characterized in that: The arc shape of the auxiliary support point matches the outline of the engine core casing.

7. The turbofan engine core borehole probe stand according to claim 1, characterized in that: The support frame (1) comprises an axial support arm (11) of the engine core, and the support arm (11) is fixed on a longitudinal frame of the support frame (1).

8. The turbofan engine core borehole probe stand according to claim 7, characterized in that: The auxiliary supporting points on both sides are fixedly connected to the support arms (11).

9. The turbofan engine core borehole probe stand according to claim 1, characterized in that: The middle auxiliary support point (31) is height-adjustable and connected to a crossbeam of the support frame (1) close to the ground along the axial direction of the engine core.

10. The turbofan engine core borehole probe stand according to claim 3, characterized in that: The engine core shaft driving device (4) is manually driven or motor driven.

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