阅读说明：本技术 一种船舶推进轴系弹性支撑对中在线监测系统及方法 (System and method for on-line monitoring of elastic support centering of ship propulsion shafting ) 是由 古成中 陈洪春 倪圆 任富山 苏高辉 周志才 罗日荣 于 2021-08-27 设计创作，主要内容包括：本发明涉及船舶推进轴系弹性支撑技术领域,具体的涉及一种船舶推进轴系弹性支撑对中在线监测系统及方法,包括四个位移传感器,分别位于弹性支撑上压板四角,测量上压板与下压板之间的位移变化；三个加速度传感器,位于弹性支撑的垂向、横向和轴向方向上,测量支撑轴承的横向、轴向和垂向振动加速度；转速传感器,位于高弹性联轴器转轴处,用于测量轴系转速；数据采集控制器将位移传感器、加速度传感器和转速传感器的测量值进行数据处理,获得弹性支撑相对主机高弹性联轴器的对中偏移值和曲折值以及弹性支撑的振动烈度值,并根据他们之间的动态关系设置不同转速工况下的对中姿态动态阈值,实现船舶推进轴系弹性支撑对中姿态在线监测及预警。(The invention relates to the technical field of elastic support of a ship propulsion shafting, in particular to a system and a method for monitoring the centering of the elastic support of the ship propulsion shafting on line, wherein the system comprises four displacement sensors which are respectively positioned at four corners of an upper pressure plate of an elastic support and used for measuring the displacement change between the upper pressure plate and a lower pressure plate; the three acceleration sensors are positioned in the vertical direction, the transverse direction and the axial direction of the elastic support and used for measuring the transverse vibration acceleration, the axial vibration acceleration and the vertical vibration acceleration of the support bearing; the rotating speed sensor is positioned at the rotating shaft of the high-elasticity coupling and used for measuring the rotating speed of the shaft system; the data acquisition controller carries out data processing on the measured values of the displacement sensor, the acceleration sensor and the rotating speed sensor to obtain a centering deviant and a bending value of the elastic support relative to the host high-elasticity coupler and a vibration intensity value of the elastic support, and centering attitude dynamic thresholds under different rotating speed working conditions are set according to dynamic relations among the centering deviant and the bending value, so that online monitoring and early warning of centering attitudes of the elastic support of the ship propulsion shafting are realized.)

1. An on-line monitoring system for elastic support centering of a ship propulsion shafting is characterized in that,

the device comprises displacement sensors arranged at four corners of a lower pressing plate of an elastic support of a propulsion shaft system, acceleration sensors arranged along the vertical direction, the transverse direction and the axial direction of the elastic support, a rotating speed sensor arranged at a rotating shaft of a high-elasticity coupling and a data acquisition controller arranged beside the elastic support, wherein the displacement sensors, the acceleration sensors and the rotating speed sensors are electrically connected with the data acquisition controller.

2. The system for on-line monitoring of the centering of the elastic support of the marine propulsion shaft system as claimed in claim 1, wherein 4 displacement sensors are fixed on the lower pressure plate of the elastic support through an L-shaped bracket and are spaced from the upper pressure plate by a preset air gap for measuring the displacement change between the upper pressure plate and the lower pressure plate of the elastic support.

3. The system for on-line monitoring of the centering of the elastic support of the marine propulsion shaft system as claimed in claim 1, wherein 3 acceleration sensors are fixedly installed in the vertical direction, the transverse direction and the axial direction of the elastic support through bolts or adhesives respectively, and are used for measuring the vertical vibration acceleration, the transverse vibration acceleration and the axial vibration acceleration of the elastic support, and further calculating the vibration intensity of the elastic support.

4. The system for on-line monitoring of the elastic support centering of the marine propulsion shaft system as claimed in claim 1, wherein 1 rotation speed sensor is installed at the rotating shaft of the high-elasticity coupling through a bracket, and receives rotation speed pulses through a reflector attached to the rotating shaft, thereby calculating the rotation speed of the shaft system.

5. The system for on-line monitoring of centering of elastic support of marine propulsion shafting according to claim 1, wherein said data acquisition controller is used for acquiring and analyzing signals of each sensor, calculating centering attitude of elastic support relative to the main machine and vibration intensity of elastic support by a preset calculation method, and displaying and early warning on the touch control screen.

6. The monitoring method for the ship propulsion shafting elastic support centering on-line monitoring system according to any one of claims 1 to 5, characterized by comprising the following specific steps:

step 1, uploading displacement variation between an upper pressure plate and a lower pressure plate of an elastic support acquired by a displacement sensor, shafting rotating speed pulses acquired by a rotating speed sensor, and vertical, transverse and axial vibration accelerations of the elastic support acquired by an acceleration sensor to a basic software module of a data acquisition unit for preprocessing;

step 2, the basic software module preprocesses data acquired by the displacement sensor and uploads the preprocessed data to the centering posture calculation module, the centering posture calculation module obtains the vertical translation, the transverse rotation and the axial rotation of the elastic support according to a certain calculation method, and analyzes and obtains the centering posture, namely an offset value and a bending value, of the elastic support relative to the host high-elasticity coupler;

step 3, the basic software module preprocesses the rotating speed pulse acquired by the rotating speed sensor and then uploads the rotating speed pulse to the monitoring and diagnosing module, and a rotating speed signal is obtained through the monitoring and diagnosing module;

step 4, the basic software module preprocesses data acquired by the acceleration sensor and then uploads the preprocessed data to the monitoring and diagnosing module, and the vibration intensity of the elastic support under different rotating speed working conditions is obtained through calculation of the monitoring and diagnosing module;

and 5, recording the centering attitude value of the elastic support relative to the host high-elasticity coupler and the vibration intensity data of the elastic support in real time by the monitoring and diagnosing module under different rotating speed working conditions, establishing mathematical relation between the centering attitude value and the vibration intensity data of the elastic support, and setting the dynamic centering attitude threshold of the elastic support relative to the host high-elasticity coupler under different rotating speed working conditions according to the vibration intensity threshold specified by relevant standards.

7. The monitoring method according to claim 6, further comprising a step 6, wherein the monitoring and diagnosing module judges a diagnosis result according to the centering gesture threshold value, outputs the diagnosis result to a touch display screen of the data acquisition controller, and when the centering gesture is abnormal, the touch control screen displays an alarm to prompt a worker to perform troubleshooting.

8. The line monitoring method according to claim 6, wherein in the step 2, the centering offset value δ and the meandering value ε are calculated by the following formula:

wherein d is the vertical translation amount of the elastic support upper pressure plate, alpha is the transverse disturbance amount of the elastic support upper pressure plate, gamma is the axial disturbance amount of the elastic support upper pressure plate, beta and theta are intermediate variables, L₃The horizontal distance L from the upper vertex of the end of the high-elastic flange to the center point of the upper pressure plate is close to the elastic support₄Is the flange end face diameter, L₅The vertical distance from the upper vertex of the elastic support close to the end of the high elastic flange to the plane of the upper pressure plate is adopted.

9. The method of claim 8, wherein each variable is associated with L₁、L₂、L₃、L₄、L₅And real-time values y acquired by four displacement sensors₁、y₂、y₃、y₄The relationship between them is:

α＝(y₁-y₃)/L₁＝(y₂-y₄)/L₁

γ＝(y₃-y₄)/L₂＝(y₁-y₂)/L₂

θ＝arctan(L₃/L₅)

β＝arctan(L₃/(L₅-L₄))

d＝(y₁+y₂+y₃+y₄)/4；

L₁is the horizontal distance between 1# and 2# displacement sensorsFrom, L₂Is the horizontal distance between the 2# and 4# displacement sensors.

Technical Field

The disclosure relates to the technical field of ship propulsion shafting centering monitoring, in particular to a ship propulsion shafting elastic support centering on-line monitoring system and method.

Background

The elastic support of the ship propulsion shafting is a support bearing with vibration reduction, is an important component of a power output transmission mechanism transmission part of the ship propulsion diesel engine, is arranged between a high-elasticity coupling and a universal coupling of the diesel engine, mainly plays a role in supporting the high-elasticity coupling and the universal coupling and simultaneously transmits the power of the diesel engine.

The elastic support of the ship propulsion shafting generally has the problem of severe vibration, and one of the important reasons for the severe vibration is misalignment between the main propulsion diesel engine and the middle short shaft of the elastic support. At present, a ship propulsion shaft system generally adopts a dial indicator to measure the offset and the tortuosity value of a short shaft and a propulsion diesel engine in an elastic support for static centering, and a static centering attitude threshold value is set. The test method is complex, a special tool is needed for multiple times of static measurement, and the method can only measure the centering attitude in a static state, cannot dynamically monitor the centering attitude of a short shaft and a main machine in the elastic support of a ship propulsion shafting on line, cannot set a dynamic centering attitude threshold value, and can perform dynamic centering attitude early warning.

Therefore, a real-time centering online monitoring system is urgently needed in engineering, the system can monitor the centering posture of the elastic support and the host and the vibration intensity of the elastic support in real time, and establish a dynamic relation between the centering posture and the vibration intensity, so that a reasonable dynamic centering posture threshold value is set according to the vibration intensity threshold value of the elastic support, online monitoring and early warning of the centering posture of the elastic support of the ship propulsion shafting are realized, early fault hidden dangers caused by abnormal centering can be found in time, and help is provided for equipment management and maintenance.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a system and a method for monitoring the centering of the elastic support of a ship propulsion shafting on line, so as to realize the purposes of monitoring and early warning the centering posture of the elastic support of the ship propulsion shafting on line.

In order to achieve the above object, one or more embodiments of the present invention provide the following technical solutions:

the invention discloses a centering on-line monitoring system for elastic supports of a ship propulsion shaft system, which comprises displacement sensors arranged at four corners of a lower pressing plate of the elastic supports of the propulsion shaft system, acceleration sensors arranged along the vertical, transverse and axial directions of the elastic supports, a rotating speed sensor arranged at a rotating shaft of a high-elasticity coupling and a data acquisition controller arranged beside the elastic supports, wherein the displacement sensors, the acceleration sensors and the rotating speed sensor are electrically connected with the data acquisition controller.

According to the further technical scheme, the 4 displacement sensors are fixed on the elastic support lower pressing plate through the L-shaped supports and are spaced from the upper pressing plate to preset air gaps for measuring displacement changes between the elastic support upper pressing plate and the lower pressing plate.

According to the further technical scheme, the 3 acceleration sensors are fixedly installed in the vertical direction, the transverse direction and the axial direction of the elastic support through bolts or adhesives respectively and used for measuring the vertical vibration acceleration, the transverse vibration acceleration and the axial vibration acceleration of the elastic support and further calculating the vibration intensity of the elastic support.

According to the further technical scheme, the 1 rotating speed sensor is installed at the rotating shaft of the high-elasticity coupling through a support, and the rotating speed pulse is received through a reflector adhered to the rotating shaft, so that the rotating speed of the shaft system is calculated.

According to a further technical scheme, the data acquisition controller comprises an external interface, data acquisition and analysis hardware, a touch control screen, a basic software module, a centering posture calculation module and a monitoring and diagnosis module, and is used for acquiring and analyzing sensor signals, calculating a centering posture of the elastic support relative to the host and vibration intensity of the elastic support through a certain calculation method, and displaying and early warning on the touch control screen.

In a second aspect, the disclosure further relates to an online monitoring method for centering of elastic support of a ship propulsion shafting, and the online monitoring system for centering of elastic support of a ship propulsion shafting based on the application comprises the following specific steps:

step 1, uploading displacement variation between an upper pressure plate and a lower pressure plate of an elastic support acquired by a displacement sensor, shafting rotating speed pulses acquired by a rotating speed sensor, and vertical, transverse and axial vibration accelerations of the elastic support acquired by an acceleration sensor to a basic software module of a data acquisition unit for preprocessing;

step 2, the basic software module preprocesses data acquired by the displacement sensor and uploads the preprocessed data to the centering posture calculation module, the centering posture calculation module calculates vertical translation, transverse rotation and axial rotation of the elastic support according to a certain calculation method, and the centering posture calculation module analyzes and obtains a centering deviation value and a bending value of the elastic support relative to the host high-elasticity coupler;

step 3, the basic software module preprocesses the rotating speed pulse acquired by the rotating speed sensor and then uploads the rotating speed pulse to the monitoring and diagnosing module, and a rotating speed signal is obtained through the monitoring and diagnosing module;

step 4, the basic software module preprocesses data acquired by the acceleration sensor and then uploads the preprocessed data to the monitoring and diagnosing module, and the vibration intensity of the elastic support under different rotating speed working conditions is obtained through calculation of the monitoring and diagnosing module;

and 5, recording the centering attitude value of the elastic support relative to the host high-elasticity coupler and the vibration intensity data of the elastic support in real time by the monitoring and diagnosing module under different rotating speed working conditions, establishing mathematical relation between the centering attitude value and the vibration intensity data of the elastic support, and setting the dynamic centering attitude threshold of the elastic support relative to the host high-elasticity coupler under different rotating speed working conditions according to the vibration intensity threshold specified by relevant standards.

The technical scheme further comprises a step 6, the monitoring and diagnosing module judges a diagnosis result according to the centering posture threshold value and outputs the diagnosis result to a touch display screen of the data acquisition controller, and when the centering posture is abnormal, the touch control screen can display an alarm to prompt a worker to carry out fault maintenance.

In the step 2, the calculation formula of the centering offset value δ and the meandering value epsilon is as follows:

wherein d is the vertical translation amount of the elastic support upper pressure plate, alpha is the transverse disturbance amount of the elastic support upper pressure plate, gamma is the axial disturbance amount of the elastic support upper pressure plate, and beta and theta are intermediate variables; l is₁Is the horizontal distance between 1# and 2# displacement sensors, L₂Is the horizontal distance between 2# and 4# displacement sensors, L₃The horizontal distance L from the upper vertex of the end of the high-elastic flange to the center point of the upper pressure plate is close to the elastic support₄Is the flange end face diameter, L₅The vertical distance from the upper vertex of the elastic support close to the end of the high elastic flange to the plane of the upper pressure plate is adopted.

Further technical solution, variables and size L of elastic support structure₁、L₂、L₃、L₄、L₅And real-time value y collected by displacement sensor₁、y₂、y₃、y₄The relationship between them is:

α＝(y₁-y₃)/L₁＝(y₂-y₄)/L₁

γ＝(y₃-y₄)/L₂＝(y₁-y₂)/L₂

θ＝arctan(L₃/L₅)

β＝arctan(L₃/(L₅-L₄))

d＝(y₁+y₂+y₃+y₄)/4。

the beneficial effects of one or more technical schemes are as follows:

the centering attitude of the elastic support of the ship propulsion shafting can be monitored on line only by 4 displacement sensors and a certain calculation method, and the centering state threshold of the elastic support under different rotating speed working conditions can be determined by combining 3 acceleration sensors and 1 rotating speed sensor, so that the online monitoring and early warning of the centering attitude of the elastic support of the ship propulsion shafting are realized.

The system has the advantages of simple structure, convenient sensor installation and high measurement precision, can perform long-time online measurement, overcomes the defects that a laser centering instrument, a dial indicator and the like cannot perform online monitoring and early warning, and fills the blank of the online monitoring technology of the centering posture of the elastic support of the ship propulsion shafting.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a top view of a sensor point layout of the present invention

FIG. 3 is a front view of a sensor site layout of the present invention;

FIG. 4 is a view showing the upper platen translating vertically;

FIG. 5 is a state diagram of the upper platen in lateral orbiting;

FIG. 6 is a view showing the upper platen in an axially orbiting state;

FIG. 7 is a schematic diagram of a front view of a data acquisition controller according to the present invention;

FIG. 8 is a schematic diagram of the left side of the data acquisition controller structure of the present invention;

FIG. 9 is a schematic diagram of the right side of the data acquisition controller structure of the present invention;

in the figure, 1, a displacement sensor, 1-1, a first vertical eddy current displacement sensor, 1-2, a second vertical eddy current displacement sensor, 1-3, a third vertical eddy current displacement sensor, 1-4 and a fourth vertical eddy current displacement sensor; 2. 2-1 of an acceleration sensor, 2-2 of a first acceleration sensor, 2-3 of a second acceleration sensor and a third acceleration sensor; 3. the device comprises a rotating speed sensor, 4, a data acquisition controller, 4-1, a first analog input channel slot, 4-2, a second analog input channel slot, 4-3, a first rotating speed/counter channel, 4-4, a second rotating speed/counter channel, 4-5, a USB interface, 4-6, a power switch, 4-7, a charging port/external power interface, 4-8, an Ethernet interface, 4-9, a touch control screen, 5, a software module, 5-1, a basic software module, 5-2, a centering posture calculation module, 5-3, a monitoring diagnosis module, 6, an L-shaped bracket, 7, an elastic shock absorber, 8, an upper pressure plate, 9, a lower pressure plate, 10, an elastic support, 11, a shaft, 12, a power supply, 13 and a high-elasticity coupling.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

Example 1

The invention discloses an on-line monitoring system for elastic support centering of a ship propulsion shafting, which comprises a monitoring device, a monitoring device and a control device, wherein the monitoring device is shown in figures 1-9, four corners of a lower pressing plate 9 elastically supported by a propulsion shafting are provided with a first vertical eddy current displacement sensor 1-1, a second vertical eddy current displacement sensor 1-2, a third vertical eddy current displacement sensor 1-3 and a fourth vertical eddy current displacement sensor 1-4, 3 acceleration sensors are arranged in the vertical direction, the transverse direction and the axial direction of the elastic support 10, and are respectively a first acceleration sensor 2-1, a second acceleration sensor 2-2 and a third acceleration sensor 2-3, the rotating shaft 11 of the high-elasticity coupling is provided with 1 rotating speed sensor 3, 1 set of data acquisition controller 4 is arranged beside the elastic support 10, and all the sensors are electrically connected with the data acquisition controller.

Referring to fig. 1-3, L-shaped brackets 6 are arranged at four corners of an elastic support lower pressing plate 9, a first vertical eddy current displacement sensor 1-1, a second vertical eddy current displacement sensor 1-2, a third vertical eddy current displacement sensor 1-3 and a fourth vertical eddy current displacement sensor 1-4 are respectively and fixedly installed at the top end of the L-shaped brackets 6, a certain initial air gap is kept between 4 vertical eddy current displacement sensor probes and an upper pressing plate 8, and the displacement change between the upper pressing plate and the lower pressing plate can cause the centering posture of the elastic support 10 and a host high-elasticity coupler 13 to change, so that the displacement change between the upper pressing plate and the lower pressing plate is measured through the 4 vertical eddy current displacement sensors.

Referring to fig. 1-3, a first acceleration sensor 2-1, a second acceleration sensor 2-2, and a third acceleration sensor 2-3 are respectively and fixedly installed in the vertical, transverse, and axial directions of the elastic support 10 by bolts or adhesives, and are used for measuring the vertical, transverse, and axial vibration accelerations of the elastic support 10, and calculating the vibration intensity by a data acquisition controller 4.

Referring to fig. 1 to 3, the rotation speed sensor 3 is a non-contact photoelectric rotation speed sensor, is installed near the high-elasticity coupling 13, measures rotation speed pulses through a reflector adhered to the rotating shaft 11, and calculates the rotation speed through the data acquisition controller 4.

Referring to fig. 7-9, the data acquisition controller 4 includes a first analog input channel slot 4-1, a second analog input channel slot 4-2, a first speed/counter channel 4-3, a second speed/counter channel 4-4, a USB interface 4-5, a power switch 4-6, a charging port/external power interface 4-7, an ethernet interface 4-8, and a touch control screen 4-9; the first analog input channel slot 4-1 and the second analog input channel slot 4-2 are analog input channel slots on the left side of the data acquisition controller, each slot is provided with 4 channels, 8 channels have ICP/IEPE, AC and DC access capabilities, and simultaneously are internally provided with power supply functions of eddy current sensors, the first vertical eddy current displacement sensor 1-1, the second vertical eddy current displacement sensor 1-2, the third vertical eddy current displacement sensor 1-3, the fourth vertical eddy current displacement sensor 1-4, the first acceleration sensor 2-1, the second acceleration sensor 2-2 and the third acceleration sensor 2-3 are respectively accessed into 7 channels, and the other 1 channel is a backup.

The rotating speed sensor 3 is connected to 1 channel of the first rotating speed/counter channel 4-3 or the second rotating speed/counter channel 4-4, and the other 1 channel is a backup. The USB interface 4-5 of the data acquisition controller 4 can be externally connected with a keyboard, a mouse and an external storage medium. And a charging port/external power interface 4-7 of the data acquisition controller 4 for supplying power to the data acquisition controller. And the Ethernet interface 4-8 at the right side of the data acquisition controller 4 is used for establishing communication with a computer to control acquisition. And a touch control screen 4-9 on the front surface of the data acquisition controller 4 is used for operating control software and displaying.

Referring to fig. 7, the data acquisition controller 4 comprises a software module 5, wherein the software module comprises a basic software module 5-1, a centering posture calculation module 5-2 and a monitoring diagnosis module 5-3; the basic software module 5-1 is connected with the centering posture calculation module 5-2 and the monitoring diagnosis module 5-3, and the centering posture calculation module 5-2 is connected with the monitoring diagnosis module 5-3. Wherein, the basic software module 5-1 has the functions of real-time/after-the-fact acquisition and analysis parameter setting, data preprocessing, acquisition control, graphic display, data management and the like; the basic software module 5-1 inputs the acquired measurement values of the first vertical eddy current displacement sensor 1-1, the second vertical eddy current displacement sensor 1-2, the third vertical eddy current displacement sensor 1-2 and the fourth vertical eddy current displacement sensor 1-4 into the centering attitude calculation module 5-2; the collected measured values of the acceleration sensor 2-1, the second acceleration sensor 2-2, the third acceleration sensor 2-3 and the rotating speed sensor 3 are processed and then input to the monitoring and diagnosing module 5-3. And the basic software module 5-1 carries out preprocessing on the data measured by the sensor, wherein the preprocessing comprises AD conversion, digital filtering and calculus processing.

The centering gesture calculation module 5-2 calculates the vertical translation, the transverse rotation and the axial rotation of the elastic support by combining the structure parameters of the elastic support through the input measured values of the first vertical eddy current displacement sensor 1-1, the second vertical eddy current displacement sensor 1-2, the third vertical eddy current displacement sensor 1-3 and the fourth vertical eddy current displacement sensor 1-4, further calculates the centering offset and the bending value of the elastic support relative to the host high-elasticity coupler 13, and the centering gesture is displayed on the touch control screen 4-9 in real time.

The data acquisition controller 4 is internally provided with a high-speed multi-core control processor, a large-capacity solid state disk is used for storing data, the data operation and reading speed is high, a power supply module is arranged in the data acquisition controller 4 and can work independently, and an additional power supply adapter can be connected with an external power supply 12. The data acquisition controller is provided with a portable handle which can be conveniently carried and can also be permanently arranged beside the machine.

Example 2

Referring to fig. 1-9, the invention discloses an on-line monitoring method for centering of elastic support of a ship propulsion shafting, and the on-line monitoring system for centering of elastic support of the ship propulsion shafting comprises the following specific steps:

step 1, uploading shafting rotating speed pulses acquired by a first vertical eddy current displacement sensor 1-1, a second vertical eddy current displacement sensor 1-2, a third vertical eddy current displacement sensor 1-3 and a fourth vertical eddy current displacement sensor 1-4 to a basic software module 5-1 of a data acquisition device 4 for preprocessing, wherein the preprocessing comprises AD conversion, digital filtering, calculus processing and the like, displacement variation between an upper pressing plate and a lower pressing plate of an elastic support acquired by the first vertical eddy current displacement sensor 2-1, the second acceleration sensor 2-2 and the third acceleration sensor 2-3 of the elastic support vertical vibration acceleration, transverse vibration acceleration and axial vibration acceleration, and the shafting rotating speed pulses are acquired by the rotating speed sensor 3.

Step 2, the basic software module 5-1 preprocesses data collected by the first vertical eddy current displacement sensor 1-1, the second vertical eddy current displacement sensor 1-2, the third vertical eddy current displacement sensor 1-3 and the fourth vertical eddy current displacement sensor 1-4 and uploads the preprocessed data to the centering attitude calculation module 5-2, the centering attitude calculation module 5-2 calculates vertical translation d, transverse rotation alpha (transverse rotation around a ship body) and axial rotation gamma (axial rotation around the ship body) of the elastic support according to a certain calculation method, and the centering offset value delta and the tortuosity value epsilon of the elastic support relative to the host high-elasticity coupler are obtained through analysis;

step 3, the basic software module 5-1 preprocesses the rotating speed pulse collected by the rotating speed sensor 3 and then uploads the rotating speed pulse to the monitoring and diagnosing module, and a rotating speed signal is obtained through the monitoring and diagnosing module;

and 4, preprocessing data acquired by the first acceleration sensor 2-1, the second acceleration sensor 2-2 and the third acceleration sensor 2-3 and uploading the preprocessed data to the monitoring and diagnosing module 5-3 by the basic software module 5-1, calculating by the monitoring and diagnosing module 5-3 to obtain the vibration intensity of the elastic support 10 under different rotating speed working conditions, and generally setting the root mean square value of the vibration speed in national standards as a measurement standard for representing the vibration intensity of the machine, such as:

wherein, V_rmsV (T) is the vibration intensity, and T is the measurement period, and is a function of the vibration speed along with the time.

And 5, recording the centering attitude value of the elastic support 10 relative to the host high-elasticity coupler 13 and the vibration intensity data of the elastic support 10 in real time by the monitoring and diagnosing module 5-3 under different rotating speed working conditions, establishing mathematical relation between the centering attitude value and the vibration intensity data, and setting the dynamic centering attitude threshold value of the elastic support 10 relative to the host high-elasticity coupler 13 under different rotating speed working conditions according to the vibration intensity threshold value specified by the relevant standard.

The technical scheme further comprises a step 6, the monitoring and diagnosing module 5-3 judges a diagnosis result according to the centering posture threshold value and outputs the diagnosis result to a touch display screen 4-9 of the data acquisition controller 4, and when the centering posture is abnormal, the touch display screen 4-9 displays an alarm to prompt a worker to carry out fault maintenance.

In step 2, the calculation formula of the centering offset value δ and the meandering value epsilon is as follows:

wherein d is the vertical translation amount of the elastic support upper pressure plate 8, α is the transverse disturbance amount of the elastic support upper pressure plate 8, γ is the axial disturbance amount of the elastic support upper pressure plate 8, and β and θ are intermediate variables; l is₁Is the horizontal distance L between the first vertical eddy current displacement sensor 1-1 and the second vertical eddy current displacement sensor 1-2₂Is the horizontal distance L between the second vertical eddy current displacement sensor 1-2 and the fourth vertical eddy current displacement sensor 1-4₃The horizontal distance L from the upper vertex of the end of the high-elastic flange to the center point of the upper pressure plate is close to the elastic support₄Is the diameter of the end face of the high-elastic flange, L₅The vertical distance from the upper vertex of the elastic support close to the end of the high elastic flange to the plane of the upper pressure plate is adopted.

Variable and structural dimension L of elastic support 10₁、L₂、L₃、L₄、L₅And real-time values y acquired by a first vertical eddy current displacement sensor 1-1, a second vertical eddy current displacement sensor 1-2, a third vertical eddy current displacement sensor 1-3 and a fourth vertical eddy current displacement sensor 1-4₁、y₂、y₃、y₄The relationship between them is:

α＝(y₁-y₃)/L₁＝(y₂-y₄)/L₁

γ＝(y₃-y₄)/L₂＝(y₁-y₂)/L₂

θ＝arctan(L₃/L₅)

β＝arctan(L₃/(L₅-L₄))

d＝(y₁+y₂+y₃+y₄)/4

and respectively substituting the variables and the parameters into a centering offset value delta and a tortuosity value epsilon formula to finally obtain:

therefore, the displacement change between the upper pressing plate and the lower pressing plate can be measured in real time through the first vertical eddy current displacement sensor 1-1, the second vertical eddy current displacement sensor 1-2, the third vertical eddy current displacement sensor 1-3 and the fourth vertical eddy current displacement sensor 1-4, and the centering posture of the elastic support relative to the host high-elasticity coupler can be calculated in real time by combining the size of the elastic support structure. And (5) according to the centering attitude dynamic threshold calculated in the step (5), real-time on-line monitoring and early warning of the centering attitude can be realized.

In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that numerous changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.