An online detection device and detection method for aircraft engine bearing noise

Abstract

The present invention discloses an online detection device and method for aircraft engine bearing noise, including a limit fixing seat, the limit fixing seat is connected with a detection rod, a pull rope and a spring adjustment sheet, the spring adjustment sheet is installed with a noise inspection sensor, and the noise inspection sensor is connected to a vibration noise detector through a signal transmission wire. The present invention connects the limit fixing seat and the noise inspection sensor through a spring adjustment sheet, the limit fixing seat is fixed on the stationary blade through a polytetrafluoroethylene limit slot, the universal joint ball joint bearing can rotate with the noise inspection sensor and is in close contact with the fairing cap detection belt, the sensor probe silicone rubber protective cover and the limit fixing seat polytetrafluoroethylene limit slot are both in flexible contact, the sensor probe is in contact with the fairing cap and isolates vibration outside the measurement part, and ensures the accuracy of the measurement result. The present invention realizes online inspection of engine bearing noise, and has a simple structure, is easy to operate, is portable, and is maintenance-free.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft engine bearing noise detection, and in particular to an aircraft engine bearing noise online detection device and detection method. Background Art

[0002] After an aircraft engine has been running for a period of time, it is necessary to conduct regular inspections of the bearings between the engine rotors and bearings, and monitor in real time the changes in the bearing installation clearance, bearing deformation, surface peeling, scratches or impact signal changes caused by local corrosion. During the inspection, the bearing noise sensor needs to be installed within 10~30mm of the root of the engine fairing cover, and must be in full contact with the fairing cover. However, since the engine is installed on the aircraft, the detection distance from the aircraft air intake guide body to the engine fairing cover is greater than 1350mm, and the measurement distance is much larger than the operating range that the operator's arm can reach, so direct measurement cannot be achieved.

[0003] The existing detection tool is to install the engine bearing noise detection sensor on a support rod, which extends from the middle hole of the aircraft guide body to the engine air intake, and manually control the sensor on the support rod to make it contact with the detection part of the engine fairing cap, and then perform the detection. However, during the detection, the position of the support rod sensor is easy to change, and the detection part of the engine fairing cap is easy to move, resulting in inaccurate received signals.

[0004] CN106768294A discloses a device for detecting the vibration of an engine bearing without hair loss, and the device is composed of an operating rod 1, a vibration sensor 2, an upper support 3, a support rod 4, a lower support 5, a roller 6, a spring 7, a shaft 8, and an elastic expansion ring 9. The upper support seat 3 contacts the detection part of the engine fairing cap, the roller 6 of the lower support 5 contacts the inner wall of the engine, and the upper support seat 3 and the lower support 5 are connected by a support rod 4. During measurement, the measuring device is placed at the lowest point of the aircraft air inlet 14 through the gap of the aircraft guide body 13, the support rod 4 is tilted forward, and the operating rod 1 is held to push the measuring device into the engine. When the limit point I10 of the upper support 3 contacts the engine, the operating rod 1 is continued to be pushed forward, and the upper support 3 is blocked from moving forward and can only move upward, pushing the vibration sensor 2 toward the engine fairing 15. When the limit point II11 of the lower support 5 fits the engine, the support rod 4 is in a self-locking state, and the vibration sensor 2 is pressed on the engine fairing 15, and the bearing vibration measurement can be performed at this time. This device has the following disadvantages when measuring: the lower support seat 5 is in contact with and fixed to the engine wall through the roller 6, and the roller 6 is in line contact with the engine wall. At the same time, the inner wall of the engine has a certain curvature, seams, and scars, and there may be residual deposits after use, which directly affect the positioning accuracy. The upper support seat 3 can only contact the fairing cap upward during installation, and the tightness is adjusted by the spring 7. The fairing cap is an arc surface, and the upper support seat 3 can only be installed upward. There is a gap in the fit between the sensor 2 and the fairing cap, which affects the detection accuracy. At the same time, the upper support seat 3 and the lower support seat 5 are connected by the support rod 4. The distance between the support rod 4 is relatively long, and there may be deviation during use. In addition, the entire device can only be installed at the lowest point of the aircraft air inlet and cannot be randomly installed at any position. Summary of the invention

[0005] The purpose of the present invention is to provide an online detection device and method for aircraft engine bearing noise, so as to solve the technical problems in the prior art that the position of the support rod sensor is easy to change, the detection part of the engine fairing cover is easy to move, resulting in inaccurate received signals and the sensor cannot be randomly installed at any position.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The invention provides an online detection device for aircraft engine bearing noise, comprising a limit fixing seat, to which a detection rod, a pull rope and a spring adjustment plate are connected, to which a noise detection sensor is installed, and the noise detection sensor is connected to a bearing noise detection instrument via a transmission wire.

[0008] Furthermore, the limit fixing seat is provided with a draw rope hole, a movable bolt hole, a spring mounting seat, and a polytetrafluoroethylene limit slot. The draw rope hole is connected with a draw rope, and the spring mounting seat is connected to the spring adjustment plate through a bolt.

[0009] Furthermore, the movable bolt hole connects the detection rod to the limit fixing seat through the fixing seat connecting bolt.

[0010] Furthermore, the noise check sensor is provided with a universal joint ball joint bearing, a sensor fixing base, a rubber ring, a silicone protective cover, a sensor probe and a sensor support seat, and the noise check sensor is installed on the spring adjustment plate through the sensor support seat and the sensor fixing seat adjustment bolt.

[0011] Furthermore, the sensor probe is connected to a signal transmission wire.

[0012] Furthermore, a universal joint ball joint bearing and a sensor probe are provided on the sensor fixing base, the universal joint ball joint bearing is connected to a sensor support seat, and a silicone protective cover is provided outside the sensor probe.

[0013] Furthermore, the detection rod is a two-section foldable structure with a length greater than 1500 mm.

[0014] Furthermore, the spring adjustment piece is an arched structure and is provided with a plurality of identical adjustment slots.

[0015] The present invention also provides a detection method of an aircraft engine bearing noise online detection device, comprising the following steps:

[0016] (1) According to different engine parameters, move the spring adjustment plate position through the adjustment slot so that the sensor probe of the noise check sensor is in close contact with the fairing cap, and the limit fixing seat is fixed on the stationary blade;

[0017] (2) The detection rod is folded and opened, and the limit fixing seat is rotated through the fixing seat connecting bolt and made parallel to the detection rod. It enters the engine airflow channel through the narrow space of the aircraft air intake guide body. The pull rope is pulled to make the limit fixing seat and the detection rod at an angle of about 90°. The detection rod drives the limit fixing seat to contact the stationary blades, and moves the limit fixing seat along the stationary blades toward the fairing cap to ensure that the limit fixing seat can be closely contacted with the stationary blades and the limit fixing seat is tightly clamped on the stationary blades through the polytetrafluoroethylene limit slot. At the same time, the noise inspection sensor can contact the fairing cap and rotate through the universal joint ball joint bearing to ensure that the sensor probe can be closely combined with the effective detection area of ​​the fairing cap. The engine bearing noise signal is transmitted to the bearing noise inspection instrument through the transmission wire for online bearing inspection.

[0018] Based on the above technical solution, the embodiments of the present invention can at least produce the following technical effects:

[0019] (1) The present invention realizes online inspection of engine bearing noise, has a simple structure, is easy to operate, portable and maintenance-free.

[0020] (2) The limit fixing seat and the noise detection sensor of the present invention are connected by a spring adjustment plate. The distance between the two is short, about half the distance of the stationary blade. It is not easy to move and deviate during detection, ensuring accurate reception of the bearing noise signal.

[0021] (3) The limit fixing seat is fixed on the stationary blade through a polytetrafluoroethylene limit slot. The limit fixing seat and the blade are in surface contact, which ensures that the blade is fixed without displacement during use. At the same time, the polytetrafluoroethylene limit slot does not damage the stationary blade. The universal joint ball joint bearing in the noise check sensor can move with the noise check sensor and be in close contact with the fairing cap detection belt. The universal joint ball joint bearing can adjust the sensor probe to fit closely with the arc detection belt of the fairing cap. The silicone protective cover prevents the sensor probe from making hard contact with the fairing cap detection belt.

[0022] (4) The limit fixing seat can be fixed on any stationary blade and can randomly detect different directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or 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 some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0025] Figure 2 This is a diagram of a position limiting fixing seat according to an embodiment of the present invention;

[0026] Figure 3 It is the noise check sensor intention of the embodiment of the present invention;

[0027] Figure 4 is a structural diagram of a spring adjustment piece according to an embodiment of the present invention;

[0028] Figure 5 It is an installation and use diagram of an embodiment of the present invention;

[0029] In the figure: 1-detection rod; 2-pull rope; 3-spring leaf adjustment bolt; 4-limit fixing seat, 4a-pull rope hole, 4b-movable bolt hole, 4c-spring mounting seat, 4d-polytetrafluoroethylene limit slot; 5-fixing seat connecting bolt; 6-noise check sensor, 6a-universal joint ball joint bearing, 6b-sensor fixing base, 6c-rubber ring; 6d-silicone protective cover, 6e-sensor probe; 6f-sensor support seat; 7-sensor fixing seat adjustment bolt; 8-spring adjustment sheet, 8a-adjustment slot; 9-transmission wire; 10-bearing noise tester; 11-flow guide body; 12-straightening cap; 13-stationary blade. DETAILED DESCRIPTION

[0030] The following will combine 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 described embodiments are only part of the embodiments of the present invention, not all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0031] In the description of the present application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application; unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. Example

[0032] like Figure 1-5 As shown, the present invention provides an online detection device and detection method for aircraft engine bearing noise, including: a detection rod 1, a pull rope 2, a spring sheet adjustment bolt 3, a limit fixing seat 4, a fixing seat connecting bolt 5, a noise detection sensor 6, a sensor fixing seat adjustment bolt 7, a spring adjustment sheet 8, a transmission wire 9, and a bearing noise detector 10;

[0033] In this embodiment, the limit fixing seat 4 is a wedge structure, which is a two-layer symmetrical structure, connected to the fixing seat connecting bolt 5 through the movable bolt hole 4b, connected to the pull rope 2 through the pull rope hole 4a, and connected to the spring adjustment piece 8 through the spring mounting seat 4c. A polytetrafluoroethylene limit slot 4d is provided in the limit fixing seat 4;

[0034] In this embodiment, the noise inspection sensor 6 has a universal joint ball joint bearing 6a, a sensor probe 6e, a silicone protective cover 6d, a sensor fixing base 6b, a rubber ring 6c, and a sensor support seat 6f;

[0035] In this embodiment, the spring adjustment piece 8 is an arched structure and is provided with four identical adjustment slots 8a;

[0036] In this embodiment, the detection rod 1 is a two-section foldable structure with a length greater than 1500 mm.

[0037] In this embodiment, during detection, according to different engine parameters, the position of the spring adjustment piece 8 is moved by adjusting the groove 8a, so that the sensor probe 6e of the noise detection sensor 6 is in close contact with the fairing cap 12, and the limit fixing seat 4 is fixed on the stationary blade 13; the detection rod 1 is folded and opened, the limit fixing seat 4 is rotated through the fixing seat connecting bolt 5 and made parallel to the detection rod 1, and enters the engine air flow channel through the narrow space of the aircraft intake guide body 11, and the pull rope 2 is pulled to make the limit fixing seat 4 and the detection rod 1 at an angle of about 90°, and the detection rod 1 drives the limit fixing seat 4 and The stationary blades 13 are in contact, and the limit fixing seat 4 is moved along the stationary blades 13 toward the fairing cap 12 to ensure that the limit fixing seat 4 can be in close contact with the stationary blades 13 and the limit fixing seat 4 is tightly clamped on the stationary blades 13 through the polytetrafluoroethylene limit slot 4d. At the same time, the noise inspection sensor 6 can be in contact with the fairing cap 12 and rotated through the universal joint ball joint bearing 6a to ensure that the sensor probe 6e can be tightly combined with the effective detection area of ​​the fairing cap 12. The engine bearing noise signal is transmitted to the bearing noise inspector 10 through the transmission wire 9 for online bearing inspection.

[0038] The present invention uses a detection rod 1 to push the limit fixing seat 4 and the noise inspection sensor 6 to the measuring position, and the length of the detection rod 1 meets the measurement distance of 1350mm. The spring adjustment plate 8 connects the limit fixing seat 4 and the noise inspection sensor 6, and the distance between the two is short, which is about 1 / 2 of the length of the stationary blade 13, and it is not easy to deviate during use. The limit fixing seat 4 is fixed on the stationary blade 13 through a polytetrafluoroethylene limit card slot for surface contact. It is tightly fixed during use and is not easy to shake. The universal joint ball joint bearing 6a can move with the noise inspection sensor 6 and be in close contact with the detection belt of the fairing cap 12, so that the sensor probe 6e can be completely in contact with the detection belt. The silicone protective cover 6d of the sensor detection head and the polytetrafluoroethylene limit card slot 4d are both flexible contacts, so that the sensor contacts the fairing cap 12 and isolates the vibration outside the measurement position, ensuring the accuracy of the measurement result. At the same time, the limit fixing seat 4 can be fixed on any stationary blade 13, and different directions can be randomly detected.

[0039] The structures, functions and connection forms disclosed in this article can be implemented in other ways. For example, the embodiments described above are only exemplary, for example, multiple components can be combined or integrated into another component; in addition, each functional component in each embodiment of this article can be integrated into one functional component, or each functional component can exist physically separately, or two or more functional components can be integrated into one functional component.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An online detection device for aircraft engine bearing noise, characterized in that: It comprises a limit fixing seat (4), the limit fixing seat (4) is connected to a detection rod (1), a pull rope (2) and a spring adjustment plate (8), the spring adjustment plate (8) is installed with a noise inspection sensor (6), and the noise inspection sensor (6) is connected to a bearing noise inspection instrument (10) via a transmission wire (9); The limit fixing seat (4) is provided with a pull rope hole (4a), a movable bolt hole (4b), a spring mounting seat (4c), and a polytetrafluoroethylene limit slot (4d); the pull rope hole (4a) is connected to a pull rope (2); the spring mounting seat (4c) is connected to a spring adjustment plate (8) via a bolt; the movable bolt hole (4b) connects the detection rod (1) to the limit fixing seat (4) via a fixing seat connecting bolt (5); The noise inspection sensor (6) is provided with a universal joint ball bearing (6a), a sensor fixing base (6b), a rubber ring (6c), a silicone protective sleeve (6d), a sensor probe (6e) and a sensor support base (6f); the noise inspection sensor (6) is mounted on a spring adjustment plate (8) via the sensor support base (6f) and a sensor fixing base adjustment bolt (7); The sensor fixing base (6b) is provided with a universal joint ball joint bearing (6a) and a sensor probe (6e); the universal joint ball joint bearing (6a) is connected to a sensor support base (6f); and the sensor probe (6e) is provided with a silicone protective sleeve (6d) on the outside; the spring adjustment sheet (8) is an arched structure and is provided with a plurality of identical adjustment slots (8a); the pull rope (2) is pulled so that the limit fixing seat (4) and the detection rod (1) are at an angle of about 90 degrees, and the limit fixing seat (4) is tightly clamped on the stationary blade (13) through the polytetrafluoroethylene limit clamping slot (4d), and the universal joint ball joint bearing (6a) is rotated to ensure that the sensor probe (6e) can be tightly combined with the effective detection area of ​​the fairing cap (12).

2. The on-line detection device for aircraft engine bearing noise according to claim 1, characterized in that: The detection rod (1) is a two-section foldable structure with a length greater than 1500 mm.

3. The detection method of the aircraft engine bearing noise online detection device according to any one of claims 1-2, characterized in that: The following steps are involved: (1) According to different engine parameters, the position of the spring adjustment plate (8) is moved through the adjustment slot (8a); (2) The detection rod (1) is folded and opened, so that the limit fixing seat (4) is parallel to the detection rod (1), and enters the engine air flow channel through the narrow space of the aircraft air intake guide body (11). The pull rope (2) is pulled to make the limit fixing seat (4) and the detection rod (1) form an angle of about 90 degrees. The detection rod (1) drives the limit fixing seat (4) to contact the stationary blade (13), and the limit fixing seat (4) is tightly clamped on the stationary blade (13) through the polytetrafluoroethylene limit card groove (4d). At the same time, the noise inspection sensor (6) can contact the fairing cap (12), and the universal joint ball joint bearing (6a) is rotated to ensure that the sensor probe (6e) can be tightly combined with the effective detection area of ​​the fairing cap (12). The engine bearing noise signal is transmitted to the bearing noise inspection instrument (10) through the transmission wire (9) to perform online bearing inspection.

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