Rotary platform for measuring runout of aero-engine accessory shell

Abstract

The utility model discloses a revolving platform used for measuring runout of an aero-engine accessory housing, comprising a measuring table, a slide rail installed on the top surface of the measuring table, a slide plate installed on the outer side of the slide rail in a sliding manner, a plurality of jacks arranged on the top surface of the measuring table, and a spacing assembly installed on the outer side of the slide plate and passing through the jacks. A U-shaped mounting frame is mounted on the top surface of the sliding plate, a connecting disc is fixedly mounted on one side of the U-shaped mounting frame, a connecting hole is formed in the middle of the bottom surface of the connecting disc, a plurality of sliding grooves are formed in the outer side of the connecting hole, sliding blocks are slidably mounted in the sliding grooves, and laser displacement sensors are fixedly mounted on one sides of the sliding blocks. The sliding plate is used for bearing the aero-engine accessory shell, the jumping state of the shell under different centrifugal forces can be adjusted by moving the position of the sliding plate, and the laser displacement sensor can measure different positions by additionally arranging the sliding blocks at different positions in the sliding groove.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation engine testing, in particular to a rotary platform for measuring the vibration of an aviation engine accessory casing. Background Art

[0002] In the field of aircraft engine manufacturing and maintenance, the vibration measurement of engine accessory housings is an important part of ensuring engine performance and safety. When engine accessory housings, such as oil pumps and hydraulic motors, rotate at high speeds, their vibration state directly affects the stability and service life of the engine. Therefore, accurate measurement of their vibration state is extremely important for the design and manufacture of aircraft engines.

[0003] Traditional methods for measuring the runout of aircraft engine accessory housings usually use static measurement or a simple rotating measurement platform. For different positions of the engine accessory housing, the traditional measurement platform often requires complex adjustment and reinstallation, which not only increases the difficulty of the measurement work, but also affects the efficiency and accuracy of the measurement. To this end, we propose a rotary platform for measuring the runout of aircraft engine accessory housings. Utility Model Content

[0004] The utility model aims to provide a rotary platform for measuring the vibration of an aircraft engine accessory casing, so as to solve the problems raised by the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rotary platform for measuring the vibration of an aircraft engine accessory housing, comprising a measuring platform, a driving assembly for driving the measuring platform to move is arranged at the bottom of the measuring platform, a slide rail is installed on the top surface of the measuring platform, a sliding plate is slidably installed on the outer side of the slide rail, a plurality of plug holes are opened on the top surface of the measuring platform, and a limit assembly passing through the plug holes is installed on the outer side of the sliding plate;

[0006] A U-shaped mounting frame is installed on the top surface of the sliding plate, a connecting plate is fixedly installed on one side of the U-shaped mounting frame, a connecting hole is opened in the middle of the bottom surface of the connecting plate, a plurality of sliding grooves are opened on the outside of the connecting hole, a sliding block is slidably installed inside the sliding groove, and a laser displacement sensor is fixedly installed on one side of the sliding block.

[0007] Preferably, the driving assembly includes a base plate and a motor, the motor is fixedly mounted on the top surface of the base plate, and the output end of the motor is fixed to the bottom surface of the measuring platform.

[0008] Preferably, the jacks are distributed in a straight line at equal intervals on the top surface of the measuring platform.

[0009] Preferably, the limiting assembly includes a connecting plate, the connecting plate is welded to one side of the sliding plate, a first threaded rod is installed through the internal thread of the connecting plate, the lower end of the first threaded rod passes through the socket, and a knob is installed on the top surface of the first threaded rod.

[0010] Preferably, the major diameter of the first threaded rod matches the inner diameter of the socket.

[0011] Preferably, a second threaded rod is installed through the thread on the surface of the sliding block, and one end of the second threaded rod is in contact with the inner wall of the sliding groove.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The rotary platform for measuring the vibration of the aircraft engine accessory housing is configured to change the position of the laser displacement sensor by loosening the second threaded rod and moving the slider in the slide groove, and then tightening the second threaded rod so that one end of the second threaded rod contacts the inner wall of the slide groove to fix the position of the slider. A slider is placed in the connecting hole and slides into the slide groove, thereby facilitating the increase or decrease of the number of sliders and laser displacement sensors. The number and position of the laser displacement sensors are conveniently changed, so that they can be aligned with different positions of the aircraft engine accessory housing for measurement, thereby facilitating the acquisition of more data for evaluating the vibration of the housing.

[0014] 2. The rotary platform for measuring the vibration of the aircraft engine accessory housing is configured to rotate the knob to rotate the first threaded rod to disengage from the socket. At this time, the sliding plate can be slid on the outside of the slide rail to change the position of the sliding plate on the surface of the measuring platform, so that the aircraft engine accessory housing on the surface of the sliding plate can be subjected to different rotational centrifugal forces during subsequent rotation, thereby obtaining more aircraft engine accessory housing vibration data and ensuring the effectiveness of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the bottom structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the bottom plate of the utility model;

[0018] Figure 4 This is a schematic diagram of the bottom structure of the connecting plate of the utility model.

[0019] In the figure: 1, base plate; 2, motor; 3, measuring table; 4, slide rail; 5, sliding plate; 6, connecting plate; 7, first threaded rod; 8, knob; 9, jack; 10, U-shaped mounting bracket; 11, connecting plate; 12, connecting hole; 13, slide groove; 14, slider; 15, laser displacement sensor; 16, second threaded rod. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1

[0022] Please refer to Figure 1-4 As shown, the utility model provides a rotary platform for measuring the vibration of the casing of an aircraft engine accessory, including a measuring platform 3, a driving component for driving the measuring platform 3 to move is arranged at the bottom of the measuring platform 3, a slide rail 4 is installed on the top surface of the measuring platform 3, a sliding plate 5 is slidably installed on the outer side of the slide rail 4, a plurality of plug holes 9 are opened on the top surface of the measuring platform 3, the plug holes 9 are distributed in a straight line with equal intervals on the top surface of the measuring platform 3, and a limit component passing through the plug holes 9 is installed on the outer side of the sliding plate 5;

[0023] A U-shaped mounting frame 10 is installed on the top surface of the sliding plate 5, a connecting plate 11 is fixedly installed on one side of the U-shaped mounting frame 10, a connecting hole 12 is opened in the middle of the bottom surface of the connecting plate 11, a plurality of sliding grooves 13 are opened on the outside of the connecting hole 12, a sliding block 14 is slidably installed inside the sliding groove 13, and a laser displacement sensor 15 is fixedly installed on one side of the sliding block 14.

[0024] Specifically, the sliding plate 5 is used to support the aircraft engine accessory housing. By moving the position of the sliding plate 5, the housing can be in a jumping state under different centrifugal forces. By installing sliders 14 at different positions in the slide groove 13, the laser displacement sensor 15 can measure different positions.

[0025] Wherein: the driving assembly includes a base plate 1 and a motor 2, the motor 2 is fixedly mounted on the top surface of the base plate 1, and the output end of the motor 2 is fixed to the bottom surface of the measuring platform 3. Turning on the switch of the motor 2 can drive the measuring platform 3 to rotate.

[0026] Among them: the limiting assembly includes a connecting plate 6, the connecting plate 6 is welded to one side of the sliding plate 5, the internal thread of the connecting plate 6 is penetrated by a first threaded rod 7, the lower end of the first threaded rod 7 passes through the insertion hole 9, and a knob 8 is installed on the top surface of the first threaded rod 7. The major diameter of the first threaded rod 7 matches the inner diameter of the insertion hole 9. Turning the knob 8 allows the first threaded rod 7 to rotate out of the insertion hole 9. At this time, the sliding plate 5 can be slid outside the slide rail 4 to change the position of the sliding plate 5 on the surface of the measuring table 3.

[0027] Among them: a second threaded rod 16 is installed through the thread on the surface of the slider 14, and one end of the second threaded rod 16 is in conflict with the inner wall of the slide groove 13. Rotating the second threaded rod 16 can change the conflicting state between the second threaded rod 16 and the inner wall of the slide groove 13, so that the slider 14 can be moved or fixed in position.

[0028] Working principle: The utility model is a rotary platform for measuring the vibration of the accessory shell of an aircraft engine. When in use, the accessory shell of the aircraft engine to be measured is placed on the top surface of the sliding plate 5 and fixed with a specific clamp. The switch of the motor 2 is turned on to drive the measuring platform 3 to rotate, simulating the movement state of the accessory shell under the actual working state of the aircraft engine, and the vibration of the shell during the rotation process is captured and recorded in real time and accurately through the laser displacement sensor 15;

[0029] By loosening the second threaded rod 16 and moving the slider 14 in the slide groove 13, the position of the laser displacement sensor 15 is changed. Then, by tightening the second threaded rod 16, one end of the second threaded rod 16 is in contact with the inner wall of the slide groove 13, and the position of the slider 14 is fixed. By placing a slider 14 into the connecting hole 12 and sliding it into the slide groove 13, it is convenient to increase or decrease the number of sliders 14 and laser displacement sensors 15. The number and position of the laser displacement sensors 15 are convenient to change, so that they can be aligned with different positions of the aircraft engine accessory housing for measurement, thereby facilitating the acquisition of more data for evaluating the housing runout.

[0030] Turn the knob 8 to rotate the first threaded rod 7 to disengage from the socket 9. At this time, the sliding plate 5 can be slid outside the slide rail 4 to change the position of the sliding plate 5 on the surface of the measuring table 3, so that the aircraft engine accessory shell on the surface of the sliding plate 5 can be subjected to different rotational centrifugal forces during subsequent rotation, thereby obtaining more aircraft engine accessory shell vibration data. After moving the sliding plate 5 to the specified position, turn the knob 8 to drive the first threaded rod 7 to insert into the socket 9 at the corresponding position to fix the positions of the connecting plate 6 and the sliding plate 5.

[0031] The contents not described in detail in this specification belong to the prior art known to professionals in this field.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotary platform for measuring the vibration of an aircraft engine accessory housing, comprising a measuring table (3), characterized in that: A driving component for driving the measuring platform (3) to move is arranged at the bottom of the measuring platform (3); a slide rail (4) is installed on the top surface of the measuring platform (3); a sliding plate (5) is slidably installed on the outer side of the slide rail (4); a plurality of plug holes (9) are opened on the top surface of the measuring platform (3); and a limiter component passing through the plug holes (9) is installed on the outer side of the sliding plate (5); A U-shaped mounting frame (10) is mounted on the top surface of the sliding plate (5), a connecting plate (11) is fixedly mounted on one side of the U-shaped mounting frame (10), a connecting hole (12) is provided in the middle of the bottom surface of the connecting plate (11), a plurality of sliding grooves (13) are provided outside the connecting hole (12), a sliding block (14) is slidably mounted inside the sliding groove (13), and a laser displacement sensor (15) is fixedly mounted on one side of the sliding block (14).

2. A rotary platform for measuring the vibration of an aircraft engine accessory housing according to claim 1, characterized in that: The driving assembly comprises a base plate (1) and a motor (2), wherein the motor (2) is fixedly mounted on the top surface of the base plate (1), and an output end of the motor (2) is fixed to the bottom surface of a measuring platform (3).

3. A rotary platform for measuring the vibration of an aircraft engine accessory housing according to claim 1, characterized in that: The jacks (9) are distributed in a straight line at equal intervals on the top surface of the measuring platform (3).

4. A rotary platform for measuring the vibration of an aircraft engine accessory housing according to claim 1, characterized in that: The limit assembly comprises a connecting plate (6), the connecting plate (6) is welded to one side of the sliding plate (5), a first threaded rod (7) is installed through the internal thread of the connecting plate (6), the lower end of the first threaded rod (7) passes through the insertion hole (9), and a knob (8) is installed on the top surface of the first threaded rod (7).

5. A rotary platform for measuring the vibration of an aircraft engine accessory housing according to claim 4, characterized in that: The major diameter of the first threaded rod (7) matches the inner diameter of the insertion hole (9).

6. A rotary platform for measuring the vibration of an aircraft engine accessory housing according to claim 1, characterized in that: A second threaded rod (16) is installed through a thread on the surface of the slider (14). One end of the second threaded rod (16) contacts the inner wall of the sliding groove (13).

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