Monitoring scheme for train axle box status

1、 Industry background of train axle box status monitoring

In recent years, China's high-speed train industry has developed rapidly, and the speed of high-speed trains has continued to increase. As a key component of high-speed trains, the performance and occurrence of faults in the axle box directly affect the operation safety of high-speed trains, and even lead to serious traffic accidents, endangering the safety of passengers' lives and property, and causing significant social property losses. Therefore, it is of great significance to develop condition monitoring for the axle box bearings of high-speed trains, and accurately analyze and predict possible faults.

2、 The purpose of monitoring the status of train axle box

As a key component of high-speed trains, the performance and occurrence of faults in the axle box directly affect the safety of train operation. Therefore, monitoring the operating status of the axle box bearings in high-speed trains and accurately analyzing and predicting their faults is of great significance. This article aims to meet the requirements of vibration monitoring and fault analysis of axle box bearings in high-speed trains. A bearing vibration monitoring system is designed and built, and bearing vibration testing experiments are conducted on the high-speed train test bench. The vibration data is analyzed in the time-frequency domain to effectively diagnose the fault of the axle box.

3、 The application involved in the monitoring of train axle box status

(1) Install vibration monitoring at the axle box temperature monitoring point

(2) Radial, axial, and transverse three-dimensional vibration monitoring of the main drive shaft

(3) Abnormal situations such as high-frequency impact, vibration, temperature monitoring cracks, etc. in the box body

4、 The monitoring scheme for train axle box status involves different types of sensors and instruments

The 533AM1:533AM1 series of three-axis IEPE acceleration sensors is designed for testing and measurement applications. It uses piezoelectric ceramics as the sensitive element and has wideband response characteristics.

Dual axis temperature vibration integrated acceleration sensor: The 521T series product is a dual axis temperature vibration integrated acceleration sensor designed for testing and measurement applications. It uses piezoelectric ceramics as the sensitive element and has wideband response characteristics.

Dual axis temperature vibration integrated acceleration sensor: The 521T series product is a dual axis temperature vibration integrated acceleration sensor designed for testing and measurement applications. It uses piezoelectric ceramics as the sensitive element and has wideband response characteristics.

The dual temperature output accelerometer 812T: 812T series product is a high-sensitivity accelerometer used to measure acceleration and low-frequency vibration. Its feature is the use of a variable capacitance MEMS silicon chip as the sensitive element, which consists of a small inertial mass and a flexible element located between two plates.As the mass blocks deflect under acceleration, the capacitance between these plates will also change; The internal signal regulator of the acceleration sensor, which includes AC excitation and synchronous modulation and demodulation circuits, outputs an analog output signal proportional to the applied acceleration. The single ended signal output value is 2.5 ± 2V, and it is powered by a single ended regulated power supply with 8-36Vdc. This product has temperature compensation within the operating temperature range to obtain stable temperature response characteristics.Sensitive components and circuit components are packaged together in a small and lightweight stainless steel casing, using railway specific connectors and specialized cables with fire-resistant protective sleeves. The signal ground is insulated and isolated from the test object. The 812T series accelerometer can be installed with adhesive or M6 metric screws. This product is widely used for low-frequency measurement and reliable packaging in high-speed trains and railway applications

The 841T: 841T is a temperature vibration integrated acceleration sensor specifically designed for transmissions.

The safety of the train axle box is extremely important, and Senther Technology products provide reliable sensors for the installation and operation of trains.