CN-121976816-A - Control method, equipment and medium for monitoring working state of mechanical equipment

CN121976816ACN 121976816 ACN121976816 ACN 121976816ACN-121976816-A

Abstract

The invention belongs to the technical field of data acquisition and monitoring control, and in particular relates to a control method, equipment and medium for monitoring the working state of mechanical equipment, comprising the steps of synchronously acquiring cutter torque data, total thrust data, cutter rotating speed data, tunneling speed data and thrust cylinder array pressure data of the mechanical equipment; the method comprises the steps of obtaining thrust centroid offset based on thrust cylinder array pressure data, obtaining eccentric torsion resistance, extracting the eccentric torsion resistance in a sliding time window to obtain average resistance, obtaining working state fluctuation energy according to a time index distribution rule, obtaining a relative deviation mapping mechanism based on average tunneling speed and rated maximum tunneling speed, modulating the working state fluctuation energy to calculate equipment degradation index, comparing the equipment degradation index with a safety critical threshold value in a numerical mode, and feeding back and executing an intervention instruction. The invention realizes the distinction between natural geological resistance and abnormal eccentric clamping stagnation, and avoids mechanical false alarm and structural damage.

Inventors

ZHAO TIEZHOU
LU SHICHAO
SHI CHAOJIE
LI GUOFANG
WEI YANRUI
LI WENTAO
XUE QUNSHAN
SUN MANMAN
YANG ZHIQIANG
WANG JINGHUA
HUANG DONGDONG
LI JUNFEI
YANG LIN

Assignees

中铁十局集团有限公司

Dates

Publication Date: 20260505
Application Date: 20260407

Claims (10)

1. A control method for monitoring the operating state of a mechanical device, comprising: Synchronously acquiring cutter disc torque data, total thrust data, cutter disc rotating speed data, tunneling speed data and thrust cylinder array pressure data of mechanical equipment; Acquiring a thrust centroid offset based on the thrust cylinder array pressure data; Calculating the ratio of the rotary acting power to the linear propulsion acting power, combining the ratio of the thrust mass center offset to the physical radius of the cutterhead as a space eccentric compensation coefficient, modulating the ratio of the rotary acting power to the linear propulsion acting power, and obtaining eccentric torsion pushing impedance; based on the difference between the eccentric torsion pushing impedance and the average value of the eccentric torsion pushing impedance in a preset sliding time window, working state fluctuation energy is obtained by combining a time index distribution rule; acquiring a relative deviation mapping mechanism based on the deviation degree of the average tunneling speed in the sliding time window and the rated maximum tunneling speed of the mechanical equipment, and carrying out nonlinear modulation on the fluctuation energy of the working state based on the relative deviation mapping mechanism to calculate the degradation index of the equipment; And carrying out numerical comparison on the equipment degradation index and a safety critical threshold value, and executing matched shutdown or deviation rectification intervention instructions based on comparison result feedback.
2. The method of claim 1, wherein obtaining the thrust centroid offset based on the thrust cylinder array pressure data comprises: The method comprises the steps of converting thrust cylinder array pressure data into single-cylinder thrust data by combining the effective action area of a piston of a thrust cylinder, and accumulating the single-cylinder thrust data of all the thrust cylinders to obtain total thrust data; multiplying and accumulating single-cylinder thrust data of each thrust cylinder with the corresponding transverse coordinates thereof, and dividing the multiplied and accumulated single-cylinder thrust data by the total thrust data to obtain the actual transverse coordinates of the thrust mass center; multiplying and accumulating single-cylinder thrust data of each thrust cylinder with the corresponding longitudinal coordinates thereof, and dividing the multiplied and accumulated single-cylinder thrust data by the total thrust data to obtain the actual longitudinal coordinates of the thrust mass center; and calculating the sum of squares of the actual abscissa and the actual ordinate, and opening the root number to obtain the thrust mass center offset.
3. The control method for monitoring the operation state of a mechanical device according to claim 1, wherein the eccentric torsion resistance satisfies the following expression: ; In the formula, Is the first Eccentric torsion resistance corresponding to the sampling points; Is the first Cutter torque data corresponding to the sampling points; Is the first Cutter disc rotating speed data corresponding to the sampling points; Is the first Total thrust data corresponding to the sampling points; Is the first Tunneling speed data corresponding to the sampling points; Is the first Thrust centroid offset corresponding to each sampling point; The physical radius of the cutterhead is the physical radius of the cutterhead of the mechanical equipment; as a function of the maximum value.
4. The control method for monitoring the operation state of a mechanical device according to claim 1, wherein the operation state fluctuation energy satisfies the following expression: ; In the formula, The energy of the fluctuation of the working state; For the sliding time window the total number of the included sampling points; sampling point sequence number; Is the first Eccentric torsion resistance corresponding to the sampling points; is the average impedance; is a natural constant.
5. A control method for monitoring the operation state of a mechanical device according to claim 1, wherein the device degradation index satisfies the following expression: ; In the formula, Is the equipment degradation index; is a natural logarithmic function; Is a natural constant; the energy of the fluctuation of the working state; The rated maximum tunneling speed is set; the average tunneling speed.
6. The method according to claim 1, wherein the step of comparing the degradation index of the device with a safety threshold value, and executing a matched shutdown or deviation correction intervention command based on feedback of the comparison result, comprises: Comparing the currently calculated equipment degradation index with the safety critical threshold value pre-configured in a memory in a numerical value manner; And when the equipment degradation index is smaller than or equal to the safety critical threshold, judging that the mechanical equipment is in a normal running-in excavation state, maintaining the current driving parameters and continuing to advance.
7. The method according to claim 6, wherein the step of comparing the degradation index of the device with a safety threshold value, and executing a matched shutdown or deviation rectification intervention command based on feedback of the comparison result, further comprises: when the equipment degradation index is larger than the safety critical threshold, the mechanical equipment is judged to suffer serious clamping stagnation or is positioned at the edge of physical structure damage, and an integrated protection action instruction is immediately issued to the electric proportional valve and the frequency converter through an industrial field bus.
8. A control method for monitoring the operating state of a machine according to claim 7, the protection action is characterized by comprising the following steps: Synchronously reducing back pressure set values corresponding to pressure data of all the thrust cylinder arrays so as to relieve axial load; starting a high-pressure slurry pump in the central area of the cutter head to inject lubricating medium; and reversely adjusting the array eccentric deviation rectifying pressure of the opposite side propulsion cylinders according to the thrust centroid offset direction so as to restore the mechanical stress balance until the calculated equipment degradation index in the subsequent time window falls back below the safety critical threshold.
9. A computer electronic device comprising a memory and a processor, the memory storing a computer program, the processor implementing the steps of a control method of monitoring the operating state of a machine according to any one of claims 1-8 when the computer program is executed.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed by a processor, implements the steps of a control method of monitoring the operating state of a machine according to any one of claims 1-8.

Description

Control method, equipment and medium for monitoring working state of mechanical equipment Technical Field The invention relates to the technical field of data acquisition and monitoring control. More particularly, the present invention relates to a control method, apparatus, and medium for monitoring the operation state of a mechanical apparatus. Background In tunnel excavation engineering of loose stacked layers and complex sensitive geology, pipe pushing machines and shield machines are core mechanical equipment. The traditional control method for monitoring the working state of the mechanical equipment is mainly based on setting a fixed alarm limit on a single physical index, specifically, the traditional technology firstly sets a cutter torque threshold and a total thrust threshold before the equipment is started, in the normal operation process, a system acquires current cutter torque data and total thrust data in real time through a sensor and calculates arithmetic average values of the indexes in a set time segment, then, the instantaneous acquisition value at the current moment is directly compared with the preset alarm limit in numerical value, and if the cutter torque data exceeds the set cutter torque threshold or the total thrust data exceeds the total thrust threshold, the controller sends out an alarm signal and executes a shutdown instruction. However, the method has technical limitations when facing uneven composite geology such as loose stacked layers, wherein local collapse or alternation of softness and hardness of loose strata is easy to occur, so that the cutter head is subjected to abrupt physical mutation, resistance fluctuation caused by natural geology evolution belongs to normal construction performance, traditional control logic is used for monitoring absolute amplitude in an isolated manner, the capability of deep distinguishing between torsion pushing energy coupling and space eccentric stress state of a propulsion system is lacking, natural resistance sudden increase caused by geological change and abnormal mechanical clamping stagnation caused by eccentric wear of a mud cake or a main bearing which is partially wrapped by the cutter head cannot be distinguished, and the mechanism is used for frequently triggering false alarm to seriously drag the construction progress in complex strata, and is also used for missing report caused by the fact that initial instantaneous stress does not reach a rough alarm limit when mechanical equipment is subjected to hidden eccentric degradation, so that the cutter head structure is torn or the main bearing is finally scrapped. Disclosure of Invention In order to solve the technical problems that the prior art cannot distinguish normal geological resistance from abnormal eccentric clamping stagnation, and false alarm or equipment damage is caused, the invention provides a scheme in the following aspects. In a first aspect, the invention provides a control method for monitoring the working state of mechanical equipment, which comprises the steps of synchronously collecting cutter torque data, total thrust data, cutter rotational speed data, tunneling speed data and thrust cylinder array pressure data of the mechanical equipment, obtaining thrust centroid offset based on the thrust cylinder array pressure data, calculating the product of the cutter torque data and the cutter rotational speed data to obtain rotary working power, calculating the product of the total thrust data and the tunneling speed data to obtain linear propulsion working power, calculating the ratio of the rotary working power to the linear propulsion working power, combining the ratio of the thrust centroid offset to the cutter physical radius as a spatial eccentricity compensation coefficient, modulating the ratio of the rotary working power to the linear propulsion working power to obtain eccentric torsion resistance, obtaining the working state based on the difference of the average value of the eccentric torsion resistance in a preset sliding time window, obtaining the relative deviation degree based on the deviation degree of the average speed in the sliding time window and the maximum speed of the mechanical equipment, calculating the relative deviation degree of the maximum deviation of the average speed in the sliding time window from the sliding time window to the mapping mechanism, comparing the relative deviation degree of the maximum speed in the sliding time window to the maximum speed with the maximum speed of the mechanical equipment, and carrying out a threshold value of the threshold value degradation of the threshold of the performance degradation of the mechanical equipment, and the threshold value of the threshold value is calculated and the threshold value is calculated to be matched with the relative to be performed. The method comprises the steps of synchronously collecting multisource operation parameters of mechanical equipment, extracting thrust centr