Aeroengine lock wire deflection inspection device

Abstract

This invention discloses a device for inspecting the deflection of aero-engine locking wires, comprising a reference plate, an inspection ruler, and a connecting steel plate with a pin. The ruler has an inspection limitation area at its upper end and a handheld limitation area at its lower end. A semi-circular scale is mounted on the ruler and fixed by welding. The base of the reference plate is riveted to the connecting steel plate with the pin. The opening angle of the reference plate is adjusted according to the span of the locking wire to be overlapped, and the reference plate can be rotated around the riveting axis. The hook of the connecting steel plate is hooked onto the pin in the mounting groove of the inspection ruler. This invention's inspection device can limit the magnitude of the inspection force, effectively avoiding problems such as locking wire breakage caused by improper inspection. Simultaneously, it can quickly read the inspection results to determine the locking wire deflection, enabling rapid, safe, and accurate inspection of locking wire deflection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of deflection inspection device of locking wire, in particular to an aero-engine locking wire deflection inspection device. BACKGROUND

[0002] The locking wire of aero-engine is also called locking wire, which is used for locking fastener. Usually, two locking wires are twisted together, or a locking wire is used to tighten and limit the locking hole of fastener to prevent the fastener from loosening. The application diagram of locking wire is shown in Figure 1 、 Figure 2 ;

[0003] At present, the tightness of locking wire is judged by checking the deflection of locking wire. For example, Figure 3 , a certain force is applied to the middle part of locking wire, and the deflection value B corresponding to different span A is measured by using ruler or vernier caliper, and the deflection within the specified range is considered qualified. However, it is very inconvenient to check and measure the deflection of locking wire by using ruler and other tools at the same time, and the measurement accuracy is also poor. At the same time, the size of the checking force is not easy to control during multiple checks of locking wire, which may cause damage to locking wire, even breakage, and further cause locking failure of fastener. SUMMARY

[0004] To solve the above technical problems, an aero-engine locking wire deflection inspection device is provided, and the specific technical scheme is as follows:

[0005] An aero-engine locking wire deflection inspection device, comprising a reference plate, an inspection ruler and a switching steel sheet with a pin shaft;

[0006] The reference plate is composed of two rigid steel plates, and the root of the reference plate is provided with a mounting hole;

[0007] The inspection ruler comprises a hand holding limiting area, an inspection limiting area, a semi-ring scale disc and a ruler body;

[0008] The inspection limiting area is arranged on the upper end of the ruler body, the hand holding limiting area is arranged on the lower end of the ruler body, and the semi-ring scale disc is arranged on the ruler body and fixed by welding;

[0009] The ruler body on the upper end of the hand holding limiting area is provided with a mounting groove, and the pin shaft a is arranged in the mounting groove;

[0010] The switching steel sheet with a pin shaft comprises a switching steel sheet and a pin shaft b;

[0011] The upper end of the switching steel sheet is provided with a mounting round hole, and the lower end is inwardly inclined and provided with a hook;

[0012] The root of the reference plate is connected with the switching steel sheet with a pin shaft by riveting;

[0013] The opening angle of the reference plate is adjusted to correspond to the span size of the interlocking locking wire, and the reference plate can be rotated and adjusted around the riveting axis.

[0014] The hook of the adapter steel sheet is hooked onto pin a in the mounting groove of the inspection ruler.

[0015] In a preferred embodiment of the aircraft engine locking wire deflection inspection device, both the handheld restricted area and the inspection restricted area are wrapped with an extremely thin layer of composite material for contact protection with the locking wire and for handheld operation.

[0016] In a preferred embodiment of the aircraft engine locking wire deflection inspection device, the length dimensions of the handheld limiting area and the inspection limiting area are both set by simulation calculation and actual calibration.

[0017] The marking positions of the semi-circular dial scale are determined by simulation calculations and actual calibration settings.

[0018] The preferred embodiment of the aircraft engine locking wire deflection inspection device is that the ruler body is made of spring steel and its thickness is 0.2 mm - 0.8 mm. This dimension is set according to the inspection force limit value, taking into account the ruler body length and rigidity.

[0019] Operating procedures for an aircraft engine locking wire deflection inspection device:

[0020] Step 1: Adjust the opening angle of the reference plate according to the lock wire span A, and adjust the inspection ruler to the middle position of the opening angle of the reference plate;

[0021] Step 2: Hold the restricted area with your hand and overlap the restricted area with the middle part of the lock wire;

[0022] Step 3: Press the hand-held area and read the scale readings shown on the semi-circular dial and the reference plate. When the scale-converted deflection meets the standard requirements, the inspection is qualified.

[0023] Inspection complete.

[0024] This invention primarily involves designing a device for inspecting the deflection of aircraft engine locking wires. This device can limit the magnitude of the inspection force, effectively avoiding problems such as wire breakage caused by improper inspection. Simultaneously, it can quickly read the inspection results to determine the wire deflection. The device structure described in this invention enables rapid, safe, and accurate inspection of locking wire deflection. Compared to existing technologies, conventional locking wire deflection inspection methods take 2 minutes and 10 seconds to inspect a single wire, and have extremely poor repeatability. They cannot inspect the deflection of most locking wires. Using the device described in this invention, inspecting a single wire takes approximately 10 seconds, saving 2 minutes compared to conventional methods. Based on 500 inspection locations on a single engine, this translates to an average saving of 1000 minutes per engine. Assuming an annual production of 1000 engines, this amounts to a saving of 1 million minutes of locking wire inspection time, approximately 16,000 hours. Furthermore, the inspection has excellent repeatability and does not damage the locking wires during inspection. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a double-strand lock wire application;

[0026] Figure 2 This is a schematic diagram of a single-strand lock wire application;

[0027] Figure 3 This is a schematic diagram for checking the deflection of the locking wire;

[0028] Figure 4 A schematic diagram of a device for checking the deflection of aero-engine locking wires;

[0029] Figure 5 for Figure 4 Side view;

[0030] Figure 6 Schematic diagram a shows the application of an aircraft engine locking wire deflection inspection device;

[0031] Figure 7 Schematic diagram b shows the application of an aircraft engine locking wire deflection inspection device.

[0032] In the diagram: 1-reference plate, 2-inspection ruler, 2.1-handheld limit area, 2.2-inspection limit area, 2.3-semi-circular dial, 2.4-ruler body, 2.5-pin a, 3-adapter steel plate with pin, 3.1-adapter steel plate, 3.2-pin b, 3.3-hook, 4-locking screw. Detailed Implementation

[0033] The following is in conjunction with the appendix Figures 4-7 The invention will be further described in detail with reference to the embodiments.

[0034] An aircraft engine locking wire deflection inspection device includes a reference plate 1, an inspection ruler 2, and a connecting steel plate 3 with a pin.

[0035] The reference plate 1 is composed of two rigid steel plates, and the base plate 1 is provided with mounting holes at its root.

[0036] The inspection ruler 2 includes a handheld limiting area 2.1, an inspection limiting area 2.1, a semi-circular dial 2.3, and a ruler body 2.4;

[0037] The ruler body 2.4 has an inspection limiting area 2.2 at the upper end and a handheld limiting area 2.1 at the lower end. A semi-circular scale 2.3 is mounted on the ruler body 2.4 and fixed by welding.

[0038] The ruler body 2.4 at the upper end of the handheld limiting area 2.1 is provided with a mounting groove, and the pin a2.5 is set in the mounting groove;

[0039] The adapter steel sheet 3 with pin includes an adapter steel sheet 3.1 and a pin b 3.2;

[0040] The adapter steel sheet 3.1 has an installation hole at its upper end and a hook 3.3 that is inclined inward at its lower end;

[0041] The base plate 1 is connected to the adapter steel plate 3 with a pin by riveting at its root.

[0042] The opening angle of the reference plate 1 corresponds to the span size adjustment of the interlocking locking wire 4, and the reference plate 1 can be rotated and adjusted around the riveting axis.

[0043] The hook 3.3 of the adapter steel sheet 3.1 is hooked onto the pin a2.5 in the mounting groove of the inspection ruler 2.

[0044] Both the handheld limiting area 2.1 and the inspection limiting area 2.2 are wrapped with an extremely thin layer of composite material for contact protection with the locking wire 4 and for handheld use.

[0045] The length dimensions of the handheld restricted area 2.1 and the inspection restricted area 2.2 are both determined by simulation calculations and actual calibration.

[0046] The marking position of the 2.3 scale on the semi-circular dial is set by simulation calculation and actual calibration.

[0047] The ruler body 2.4 is made of spring steel, and its thickness is 0.2 mm - 0.8 mm. This dimension is set according to the inspection force limit value, taking into account the ruler body length and rigidity.

[0048] Operating procedures for an aircraft engine locking wire deflection inspection device:

[0049] Step 1: Adjust the opening angle of the reference plate 1 according to the lock wire span A, and adjust the inspection ruler 2 to the middle position of the opening angle of the reference plate 2;

[0050] Step 2: Hold the hand-held restricted area 2.1 with your hand and overlap the inspection restricted area 2.2 with the middle part of the lock wire;

[0051] Step 3: Press the hand-held limited area 2.1, read the scale shown on the semi-circular dial 2.3 and the plane of the reference plate 1. When the scale conversion deflection meets the standard requirements, the inspection is qualified.

[0052] Inspection complete.

Claims

1. A device for checking the deflection of aero-engine locking wires, characterized in that: Includes a reference plate, a gauge, and a connecting steel plate with a pin; The reference plate is composed of two rigid steel plates, and mounting holes are provided at the base of the reference plate. The inspection ruler includes a hand-held limiting area, an inspection limiting area, a semi-circular scale, and a ruler body; The upper part of the ruler body is provided with an inspection limiting area, the lower part is provided with a hand-held limiting area, and a semi-circular scale is provided on the ruler body and fixed by welding. The ruler at the upper end of the handheld limiting area is provided with a mounting groove, and the pin a is set in the mounting groove; The adapter steel sheet with pin includes an adapter steel sheet and a pin b; The adapter steel sheet has a mounting hole at the upper end and a hook that is inclined inward at the lower end. The base plate is connected to the base plate at its root by riveting to a connecting steel plate with a pin. The opening angle of the reference plate is adjusted to correspond to the span size of the interlocking locking wire, and the reference plate can be rotated and adjusted around the riveting axis. The hook of the adapter steel sheet is hooked onto pin a in the mounting groove of the inspection ruler.

2. The aero-engine locking wire deflection inspection device according to claim 1, characterized in that: Both the handheld and inspection restricted areas are wrapped with an extremely thin layer of composite material for contact protection with the locking wire and for handheld operation.

3. The aero-engine locking wire deflection inspection device according to claim 1, characterized in that, The length dimensions of the handheld restricted area and the inspection restricted area are both calculated by simulation and set by actual calibration. The marking positions of the semi-circular dial scale are determined by simulation calculations and actual calibration settings.

4. The aero-engine locking wire deflection inspection device according to claim 1, characterized in that: The ruler body is made of spring steel, and its thickness is 0.2 mm - 0.8 mm. This size is set according to the inspection force limit value, taking into account the ruler body length and rigidity.

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