CN-116538120-B - Tunnel ventilator health degree assessment method and system

CN116538120BCN 116538120 BCN116538120 BCN 116538120BCN-116538120-B

Abstract

The invention discloses a method and a system for evaluating the health degree of a tunnel ventilator, wherein the method comprises the steps of S1, setting the health state grade of the ventilator, S2, counting the average value and the peak value of characteristic parameters of the ventilator under different running frequencies in multiple periods, S3, setting the allowable value phi max of the superposition degree phi of current envelopes among three phases, setting a sampling time interval T m , carrying out burning alarm when phi is larger than phi max, executing S4 when phi is smaller than phi max, S4, calculating the single-parameter health degree h x of the ventilator, S5, setting the weight of the characteristic parameter x, calculating the multi-parameter health degree h of the ventilator, and S6, defining the health state of the ventilator according to the health degree h calculated in S5 and combining the health state grade of the ventilator set in S1. The invention can prompt the manager to conduct abnormal treatment in time, greatly reduces the possibility of burning out the fan and is suitable for further popularization and application.

Inventors

CHEN DEWANG
ZHENG XIAOYU
GUO YONGHUI
KONG LINGKUN
SUN YANYAN

Assignees

福建工程学院

Dates

Publication Date: 20260505
Application Date: 20230509

Claims (7)

1. A method for evaluating the health of a tunnel ventilator, comprising: S1, setting the health state grade of a ventilator, wherein the multi-parameter health degree h of the ventilator is divided into five grades according to the running timeliness of the device, wherein the multi-parameter health degree h of the ventilator is shut down when h is more than or equal to 0.85, overhauled when h is more than or equal to 0.65 and less than or equal to 0.85, unhealthy when h is more than or equal to 0.35 and less than or equal to 0.35, sub-healthy when h is more than or equal to 0 and less than or equal to 0.20; adopting current I, voltage U, motor rotating speed V, sound level S, motor bearing temperature T and outlet wind speed W of the fan under different operating frequencies in multiple periods as training samples, calculating current average value Ip, voltage average value Up, motor rotating speed average value Vp, sound level average value Sp, motor bearing temperature average value Tp and outlet wind speed average value Wp under I frequency, and calculating current peak value Imax, voltage peak value Umax, motor rotating speed peak value Vmax, sound level peak value Smax, motor bearing temperature peak value Tmax and outlet wind speed peak value Wmax under I frequency; S3, setting an allowable value phi max of the current envelope overlap ratio phi between three phases, setting a sampling time interval T m , carrying out burning alarm when phi is larger than or equal to phi max, and executing S4 when phi is smaller than phi max, wherein the phi expression is as follows: wherein j and k represent different phase groups, and ω represents a phase angle; i represents different operating frequencies; S4, calculating single-parameter health degree h x of the fan; Wherein, f x,t is a measured value of a single characteristic parameter x based on the fan at a time t, and f p and f max are an average value and a peak value of the single characteristic parameter x based on the fan; s5, setting the weight of the characteristic parameter x, and calculating the multi-parameter health degree h of the fan; Wherein m is the number of characteristic parameters, rho x is the weight of the characteristic parameter x, rho x is more than or equal to 0 and less than or equal to 1 ; And S6, defining the health state of the ventilator according to the multi-parameter health degree h of the ventilator calculated in the S5 and the health state grade of the ventilator set in the S1.
2. The method of claim 1, further comprising displaying the fan multiparameter health h, the fan single parameter health h x and the health status of the fan in a graph form, and displaying the treatment advice of the single parameter influence hidden trouble in combination with the existing maintenance information.
3. The method for evaluating the health degree of a tunnel ventilator according to claim 1, wherein the burning alarm in S3 specifically comprises: and (5) carrying out power-off shutdown alarm and connecting and disconnecting a circuit of the related fan.
4. The method for evaluating the health of a tunnel ventilator according to claim 1, wherein ρ x is determined after statistics of the probability of maintenance of the ventilator failure in S5.
5. A tunnel ventilator health assessment system, comprising: The motor rotating speed sensor is arranged on a rotating shaft of the motor and used for acquiring rotating speed data of the motor; sound level sensors which are arranged at the front, the back, the left and the right of the motor and above the center of the motor and are used for acquiring decibel data when the motor runs; the temperature sensor is arranged on the motor bearing and used for acquiring temperature data of the motor bearing; The wind speed sensor is arranged at the air outlet of the fan and is used for acquiring wind speed data of the air outlet; the current sensor is arranged on a main inlet line of the control cabinet of the ventilator and is used for acquiring current data of the ventilator; the voltage sensor is arranged on a bus entry line of a control cabinet of the ventilator and is used for acquiring voltage data of the ventilator; the alarm unit comprises an alarm bell and an alarm module, wherein the alarm bell is arranged on the outer surface of the ventilator and used for giving an alarm, and the alarm module is used for displaying the fault position; An information processing unit loaded with the method for evaluating the health of the tunnel ventilator according to any one of claims 1 to 4, for performing storage analysis on the data acquired by the sensors and controlling the alarm unit and the ventilator to perform corresponding operations under the condition that the preset condition is satisfied; The display unit is electrically connected with the information processing unit and is used for displaying the relevant data result calculated and analyzed by the information processing unit and the processing suggestion of the single parameter influence hidden danger; the sensors are connected with the information processing unit through a 4G/5G interface or a local area network.
6. The system of claim 5, wherein the information processing unit calculates the analyzed related data results including a fan multi-parameter health h, a fan single-parameter health h x , and a health status of the ventilator.
7. The system according to claim 6, wherein the information processing unit calculates the analyzed data results related to the information, and displays the data results in a form of a graph on the display unit.

Description

Tunnel ventilator health degree assessment method and system Technical Field The invention relates to the technical field of tunnel ventilators, in particular to a method and a system for evaluating the health degree of a tunnel ventilator. Background Tunnels have become an integral part of urban highways as a rapid traverse of mountain bodies. With the rapid development of national economy, the number of underground tunnel construction in China and the tunnel length are continuously increased. The tunnels solve the problems that a large amount of oxygen is required to be consumed in the running process of automobiles, a large amount of waste gas such as CO 2, CO, oxynitride and the like is discharged at the same time, the tunnels are used as relatively sealed spaces, adverse effects on human bodies can be generated if the gas cannot be discharged immediately, the exhaust gas discharged by the automobiles often contains solid particles, visibility is reduced when the concentration of the solid particles in the tunnels is high, driving safety of drivers is further affected, meanwhile, the tunnels are used as relatively sealed spaces, oxygen supplementation is only carried out by relying on natural wind, the waste gas treatment is often not achieved to an expected effect, and in addition, the tunnels are characterized by long and narrow spaces, and once a fire disaster occurs in the tunnels, a large amount of generated smoke threatens personnel to escape, influences fire rescue routes, and hinders rescue personnel from reaching and salvation to wounded persons. It is therefore important to design fans in the tunnel to assist in ventilation of the tunnel. The ventilation system mainly completes ventilation in the tunnel, realizes air quality control and temperature control in the tunnel, and ensures traffic operation safety. Therefore, high requirements are put on the safety of the ventilation fan, and the working state of the fan must be ensured. In the prior art solutions, the following aspects are focused on the tunnel safety ventilation: 1) The safety monitoring system is installed in the tunnel to detect the whole condition in the tunnel to ensure the operation safety of the tunnel. For example, a smart city tunnel safety monitoring system is provided by the patent with the application number of CN202210033733.X, and a visual subway tunnel safety comprehensive monitoring and intelligent emergency system is provided by the patent with the application number of 202011369455.2. 2) And controlling the safe energy-saving ventilation system. For example, a control method of a highway tunnel safety energy-saving ventilation system is proposed in the patent application number CN202010196482.8, which is used for mediating and controlling a fan. The patent application No. CN202210717741.6 discloses a control method of a tunnel fire extinguishing system and a smoke discharging system, and relates to a control system for tunnel fire extinguishing and smoke discharging. The application number is CN202110747356.1, and the pressurized air supply system of the safe evacuation channel is provided. 3) And (5) tunnel safety pre-warning and monitoring. For example, an expressway tunnel safety pre-warning system is proposed in the patent application number CN 202220742244.7. A tunnel safety detection device for dust content in buildings is proposed by patent application number CN 202123035209.6. The researches are used for rapid, accurate positioning and effective diagnosis of various disasters of the tunnel, so that related operators such as scheduling and the like can timely treat the disasters, and guarantee is provided for tunnel operation safety. However, the above researches are based on the good condition of the tunnel ventilation system, that is to say, the ventilation system can be regulated, monitored and pre-warned on the basis that the ventilator (smoke exhaust fan) can be regulated in normal operation. And when the safety monitoring system generates dangerous situations, passive services such as alarm, positioning and the like are sent out. How to pointedly evaluate and early warn the health degree of the ventilator (smoke exhaust fan), and to realize the active reminding and arrangement of the maintenance and replacement of the ventilator (smoke exhaust fan), the method becomes an urgent engineering problem to be solved. Through engineering investigation, most problems of the tunnel fan are concentrated on the burning of the motor, and the main reasons for the burning are three points of fan bearing vibration, motor phase failure and fan locking, so that the motor is overheated. The bearing vibration relates to vibration caused by unbalance of dust accumulation of an impeller and vibration caused by loosening of a mounting bolt, and the motor phase failure comprises phase failure during starting, wherein the motor cannot start winding current of the motor to be 5-7 times of rated current. The heating value is 15