Large-scale railway maintenance machinery performs road lifting, tamping and stabilizing operations

Large-scale railway maintenance machinery should be inspected, maintained and calibrated according to regulations to ensure that the large machinery is in good condition. The tamping vehicle should be inspected and calibrated when the tamping vehicle has been operating continuously for 30 days or the cumulative operating mileage of the vehicle reaches 50km. It should be inspected and calibrated before the first operation after the transfer. The inspection and calibration requirements are as follows:
1. Check that the corresponding linearity of the zero point and maximum value of the calibrated tamping penetration depth meets the standards.
2. Check that the linearity corresponding to the zero point and maximum value of the calibrated electronic pendulum, leveling sensor, and track sensor meets the standards, and the zero point error is not greater than 1.0mm. When replacing the electronic pendulum, leveling sensor, or track sensor, the zero point error should be recalibrated and the linearity should be checked to meet the standards.
3. Calibrate the leveling accuracy: choose to debug on a straight line without slopes and vertical curves; adjust the mechanical zero point of the leveling sensor to ensure that when the starting point meter value is within the range of ±3mm, the starting point meter needle can be adjusted to the zero position; and The difference between the left and right mechanical zero points is no more than 2mm. Tamping vehicles of the same group and model must be debugged at the same point, and the mechanical zero point difference of the leveling sensors of the tamping vehicles in the same group shall not be greater than 3mm.
4. Calibrate the accuracy of the track adjustment: Select a straight line without slopes and vertical curves for debugging. The zero point error of the track adjustment should not be greater than 2mm, and the difference between the zero points of the left and right stock track adjustment should not be greater than 1mm. Tamping trucks of the same group and model must be debugged at the same point, and the zero-point errors of the left and right loading tracks should coincide.
5. Check whether the zero point of the servo valve drifts and confirm whether the pressure value of each hydraulic system is normal.

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