Membrane disc coupling compensation amount monitoring device and method

Abstract

The invention belongs to the technical field of aero-engines, and particularly relates to a film disc coupler compensation amount monitoring device and method.The film disc coupler compensation amount monitoring device mainly comprises a fixing support, at least six laser triangular reflection displacement sensors distributed according to specific angles, reflective rings installed at the two ends of a coupler, a temperature sensor, a line concentration box and a data processing unit. The displacement change of the reflective ring is measured through the laser sensor, and a temperature compensation algorithm is combined, so that the axial compensation amount and the angular compensation amount of the coupler can be accurately calculated in real time, and the beneficial effects are that direct on-line monitoring of the operation condition of the membrane disc coupler is realized; the method provides key data for evaluating the health state and improving the system reliability, and has the advantages of high measurement precision, fast response, non-contact and the like.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of aero-engines, and particularly relates to a diaphragm coupling compensation amount monitoring device and method. BACKGROUND

[0002] The diaphragm coupling is a transmission accessory that relies on a very thin metal disc to realize compensation and torque transmission, is widely used in the fields of aviation and aerospace, and has the advantages of light weight, high efficiency, maintenance-free, and small vibration. The compensation working conditions of the diaphragm coupling include angular compensation and axial compensation. In the angular compensation, the diaphragm profile generates bending stress, and the stress changes periodically once per revolution, which is a high-cycle fatigue problem and one of the main damage modes of the diaphragm coupling. In the axial compensation, the diaphragm profile also generates bending stress, and the stress is superimposed with the angular compensation stress, thereby reducing the safety factor of the diaphragm coupling.

[0003] Therefore, in the high-reliability working condition, in order to understand the running condition of the coupling, the compensation condition of the coupling needs to be monitored.

[0004] No public document has proposed a diaphragm coupling compensation amount monitoring method and device. In the prior art, a laser alignment instrument is usually used to measure the initial compensation condition of the coupling during shaft assembly and centering, and then the working condition of the coupling in the running process is indirectly evaluated according to the thermal deformation calculation of the rotating equipment connected with the diaphragm coupling. SUMMARY

[0005] To solve the above problems, the application provides a diaphragm coupling compensation amount monitoring device, which comprises:

[0006] A support is fixedly installed on a support base on the ground or a rotor, spans the diaphragm coupling, and has a mounting seat of a laser sensor at both ends;

[0007] A first reflective ring and a second reflective ring are fixedly installed on the flanges at both ends of the diaphragm coupling, respectively, and are used for reflecting laser signals;

[0008] A plurality of laser sensors are installed on the support, are arranged in the circumferential direction of the diaphragm coupling, a part of which emits laser to the first reflective ring and receives the light signal reflected from the first reflective ring, and another part of which emits laser to the second reflective ring and receives the light signal reflected from the second reflective ring; the sensors in the first part and the second part are symmetrically arranged on both sides of the diaphragm coupling.

[0009] A temperature sensor is arranged on the support and is used for monitoring the change of the ambient temperature and calculating the thermal deformation data of the support by measuring the temperature;

[0010] A concentrator box or a transmitter is used for receiving the signals of the laser sensors and the temperature sensor;

[0011] A data processing and display unit is connected to the hub or transmitter for processing sensor data and calculating the axial and angular compensation amounts of the membrane disc coupling.

[0012] Preferably, the laser sensor spot can be projected onto the reflective ring when the membrane disc coupling is in any compensation working condition, and the reflective surface is within the range of the laser sensor.

[0013] Preferably, one end of the membrane disc coupling is connected to a reference shaft and the other end is connected to a spacer shaft, and the axial or angular deformation of the membrane disc coupling is measured by the spacer shaft to obtain the distance between the flanges at different angular positions.

[0014] The thermal deformation amount Δ of the support is calculated by the data of the temperature sensor;

[0015] The measured data is corrected for temperature deformation based on the thermal deformation amount Δ;

[0016] Based on the corrected measured data, the axial and angular compensation amounts of the coupling are calculated using a mathematical model.

[0017] Preferably, three laser sensors are arranged on each flange of the membrane disc coupling, the angular positions of the laser sensors on the two flanges are the same, the distance between the laser sensors and the flanges is the same, and the angle between adjacent laser sensors is between 60° and 120°.

[0018] Preferably, the distance d1 between the two flanges at the angular position θ1 is d1 a -d1 b -d1 c -Δ;

[0019] The distance d2 between the two flanges at the angular position θ2 is d2 a -d2 b -d2 c -Δ;

[0020] The distance d3 between the two flanges at the angular position θ3 is d3 a -d3 b -d3 c -Δ;

[0021] Wherein, d1 a is the initial reading of the laser sensor on the flange at the angular position θ1 when the membrane disc coupling is not working; d1 b and d1 c are the readings of the laser sensors on the flanges at the angular position θ1 when the membrane disc coupling is working.

[0022] d2 ais the initial reading of the laser sensor at the flanges of the membrane coupling at the angular position θ2 in the non-working state of the membrane coupling; b is the reading of the laser sensor at the flanges of the membrane coupling at the angular position θ2 in the working state of the membrane coupling; c is the initial reading of the laser sensor at the flanges of the membrane coupling at the angular position θ2 in the non-working state of the membrane coupling;

[0023] is the initial reading of the laser sensor at the flanges of the membrane coupling at the angular position θ3 in the non-working state of the membrane coupling; a is the reading of the laser sensor at the flanges of the membrane coupling at the angular position θ3 in the working state of the membrane coupling; b is the reading of the laser sensor at the flanges of the membrane coupling at the angular position θ3 in the working state of the membrane coupling; c is the reading of the laser sensor at the flanges of the membrane coupling at the angular position θ3 in the working state of the membrane coupling;

[0024] is the axial distance compensation between the two flanges of the membrane coupling; z and the angular compensation are calculated according to the following formula:

[0025] r is the radius of the laser spot on the reflecting ring, .

[0026] The real-time compensation measurement of the membrane coupling can be realized, including the axial compensation and the angular compensation. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic diagram of a compensation monitoring device for a membrane coupling;

[0028] Figure 2 is a schematic diagram of the membrane coupling in the compensation position;

[0029] Figure 3 is a schematic diagram of the membrane coupling in the compensation position A;

[0030] Figure 4 is a schematic diagram of the membrane coupling in the compensation position;

[0031] Figure 5 is a schematic diagram of the membrane coupling in the compensation position;

[0032] Figure 6 is a data size analysis diagram;

[0033] Figure 7 is a data processing principle diagram. DETAILED DESCRIPTION

[0034] For the purpose, technical solutions and advantages of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described in more detail below in combination with the drawings in the embodiments of the present application. In the drawings, the same or similar notations represent the same or similar elements or elements with the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, not all the embodiments. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below in combination with the drawings.

[0035] The present application is based on a laser triangulation displacement sensor (hereinafter referred to as a laser sensor) to realize measurement. The laser sensor uses a laser diode to work, which projects a visible spot on the surface of the measured object. The reflected (diffuse reflection) light from the spot is imaged on the photosensitive sheet in the sensor through the light receiving system. When the distance between the sensor and the measured object changes, the laser reflection angle also changes accordingly, causing the imaging position on the photosensitive element in the sensor to change.

[0036] The measurement range of the laser sensor can cover 2 to 1000 mm at most, and it has the characteristics of absolute position measurement, non-contact measurement, high resolution and high sampling rate.

[0037] Figures 1-2 For a typical use scenario of a membrane disc coupling, the reference shaft and the spacer shaft 3 are connected by the membrane disc coupling 1. During operation, the distal end (not shown) of the spacer shaft may have axial or radial displacement, thereby causing the coupling 1 to deform axially or angularly.

[0038] The coupling compensation measurement device described in the present application is composed of a bracket 6, 6 laser sensors 7, a plurality of temperature sensors 8, a reflective ring 4 and a reflective ring 5 installed on the flanges at both ends of the membrane disc coupling, a concentrator box / transmitter 9, a data processing and display unit 10.

[0039] The light reflecting ring 4 and the light reflecting ring 5 can be fixed with the flanges at the two ends of the membrane disc coupling by welding, bolt fixing, interference connection or integral machining, and the connection structure is expressed by the example of the stop port centering and bolt connection. The laser sensor 7 and the temperature sensor 8 are installed on the support 6, and the support 6 is fixed on the ground or the supporting base of the rotor. In the working process, the relative position between the support 6 and the membrane disc coupling 1 cannot have a large displacement. At the same time, the design of the support 6 should make the light spot emitted by the laser sensor 7 be able to project on the light reflecting ring 4 and 5 under any compensation working condition of the membrane disc coupling 1, and the positions of the reflecting surfaces of the light reflecting plates are within the range of the laser sensor.

[0040] Based on the measurement principle, the device needs at least 6 laser sensors, and the angle distribution between the sensors is suggested to be between 60° and 120° in order to achieve higher measurement accuracy. At the same time, in order to correct the influence of the environmental temperature on the length of the support 6 (i.e. the installation distance of the sensor), one or more temperature sensors are arranged at the sensitive position of the support 6, and the temperature sensor is suggested to be an RTD sensor.

[0041] Principle diagram of the measurement data acquisition and processing system Figures 3-7 :

[0042] 6 laser sensors 7 are connected to the junction box / transmitter 9, and a plurality of temperature sensors 8 are connected to the junction box / transmitter 9. The junction box / transmitter 9 transmits the signals to the data processing and display unit 10, and the data processing and display unit 10 processes the data and displays or uploads the measurement results to a higher level control system.

[0043] The data processing principle of the data processing and display unit 10 is as follows. The radius of the laser emitting light spot on the light reflecting ring is r, and a group (two opposite) of laser sensors distributed at the angular position θ1 have the initial reading d1 of the coupling in the non-working state. a In the working state, the thermal deformation amount Δ of the support can be calculated according to the data measured by the temperature sensor 8, and the change amounts measured by the two laser sensors are d1 b and d1 c . Therefore, in the working state, the spacing d1 between the flanges at the angular position θ1 is d1 a -d1 b -d1 c -Δ. Similarly, the spacing d2 and d3 between the flanges at the angular positions θ 2、 and θ3 can be obtained.

[0044] Therefore, the angle between the two flanges of the coupling is (θ x , θ y ), and the axial distance is d z .

[0045]

[0046] Accordingly, the axial and angular compensation amounts of the coupling can be known, r is the radius of the laser emitting spot on the reflecting ring, .

[0047] Through the application, real-time compensation measurement of the membrane disc coupling can be realized, including axial and angular compensation amounts.

[0048] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A film disc coupling compensation amount monitoring device characterized by, The application relates to a monitoring device for compensating the axial and angular displacement of a membrane disc coupling (1), comprising: a support (6) fixedly installed on the supporting base of the ground or a rotor and horizontally arranged on the membrane disc coupling (1) and provided with mounting seats for laser sensors (7) at two ends; first and second reflective rings (4 and 5) fixedly installed on the flanges at the two ends of the membrane disc coupling (1) and used for reflecting laser signals; a plurality of laser sensors (7) installed on the support (6) and arranged along the circumference of the membrane disc of the membrane disc coupling (1), a part of the laser sensors (7) emitting laser signals to the first reflective ring (4) and receiving reflected light signals from the first reflective ring (4), and the other part of the laser sensors (7) emitting laser signals to the second reflective ring (5) and receiving reflected light signals from the second reflective ring (5); a temperature sensor (8) arranged on the support (6) and used for monitoring the change of the ambient temperature and compensating the thermal deformation of the support; a concentrator box or a transmitter (9) used for receiving the signals of the laser sensors (7) and the temperature sensor (8); and a data processing and display unit (10) connected with the concentrator box or the transmitter (9) and used for processing the sensor data and calculating the axial and angular compensation amounts of the membrane disc coupling. The light spots of the laser sensors (7) can be projected onto the reflective rings under any compensation working condition of the membrane disc coupling, and the reflective surfaces are located within the measuring range of the laser sensors (7). One end of the membrane disc coupling is connected with a reference shaft, and the other end is connected with a spacer shaft (3), and the axial or angular deformation of the membrane disc coupling (1) is caused by the axial or radial displacement of the spacer shaft (3). The monitoring device for compensating the axial and angular displacement of the membrane disc coupling (1) is characterized in that: the measuring data of the distance change of the flanges at the two ends of the membrane disc coupling (1) at different angular positions are obtained through the laser sensors (7); the thermal deformation amount Delta of the support (6) is calculated through the data of the temperature sensor (8); the measuring data are corrected according to the thermal deformation amount Delta; and the axial and angular compensation amounts of the coupling are calculated through a mathematical model based on the corrected measuring data. Three laser sensors (7) are arranged on the flanges at the two ends of the membrane disc coupling (1), the angular positions of the laser sensors (7) on the flanges at the two ends are the same, the distances between the laser sensors (7) and the flanges are the same, and the angle between the adjacent laser sensors (7) is between 60 DEG and 120 DEG. ​ ​ 2. The disc coupling compensation amount monitoring device according to claim 1, characterized by ​ 3. The disc coupling compensation amount monitoring device of claim 1, wherein ​ 4. The method for monitoring the compensation amount of a diaphragm disc coupling as described in claim 1, characterized in that, ​ ​ ​ ​ ​ 5. The method of claim 4, wherein ​ 6. The method of claim 5, wherein d1 = d1 a - d1 b - d1 c - Δ; The distance d2 between the two flanges at the angular position θ2 d2 = d2 a - d2 b - d2 c - Δ; The distance d3 between the two flanges at the angular position θ3 d3 = d3 a - d3 b - d3 c - Δ; Wherein, d1 a is the initial reading of the laser sensor at the two ends of the flange at the angular position θ1 when the diaphragm coupling (1) is not in operation; d1 b and d1 c is the reading of the laser sensor at the two ends of the flange at the angular position θ1 when the diaphragm coupling (1) is in operation; d2 a d2 is the initial reading of the laser sensor at the angular position θ2 for the film disc coupling (1) in the non-operating state of the two flanges; d2 b d2 c d2 is the reading of the laser sensor at the angular position θ2 for the film disc coupling (1) in the operating state of the two flanges; d3 a d3 is the initial reading of the laser sensor at the two flanges of the membrane disc coupling (1) in the angular position θ3 in the non-working state of the membrane disc coupling (1); b d3 c d3 is the reading of the laser sensor at the two flanges of the membrane disc coupling (1) in the angular position θ3 in the working state of the membrane disc coupling (1).

7. The method of claim 6, wherein the step of determining the amount of compensation comprises the steps of: determining the amount of compensation by determining the difference between the first and second values of the parameter. The axial distance compensation amount d between the two flanges z and the angular compensation amount (θ x , θ y ) are calculated as follows: ; r is the radius at which the laser emission spot is located on the reflector ring, .

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