Balancing Machine Changed The Hidden Dangers Of The Train
Balancing Machine is the instrument used to measure the rotor imbalance, correction, according to the measurement to improve the balance of the rotor weight distribution, the vibration of the rotor shaft neck during operation or reduce the force acting on the bearing to the specified range. Recently, the application of the Balancing Machine has changed the hazard of the train, so let's take a look at it.
According to the media in this paper, the dynamic Balancing Machine, with ever increasing speed railway, maintenance of various railway section put forward higher request, the wheel is an important part of the train operation system, the accumulation of wheel unbalance in running, is also one of key factors on the car body vibration. Larger vibration cause analysis of vehicles, mainly due to wheel on dynamic balance value, eccentricity and limit excessive wheel diameter of the same character, the same wheel to wheel diameter and eccentricity must be strictly controlled within the standard requirements.
It can also produce very large centrifugal forces at high speed rotation, but how to determine if the dynamic Balancing Machine is working properly? What's wrong with the dynamic Balancing Machine we don't know yet.
Usually, the balance of the Balancing Machine shows an uneven measure of roughly 180 degrees or about 0 degrees. If there is no change, it will prove that the sensor line or sensor of the dynamic Balancing Machine has problems. The solution is to plug the number 1 plugand remove the no.2 sensor cord. Similarly, this method can be used to determine whether the sensor line 2 and the sensor are normal. The user of Dynamic Balancing Machine can look for a professional to control a faulty sensor line or sensor with another sensor line and sensor.
I think you have some understanding of the Balancing Machine. You know, some of the technical terms of the Balancing Machine, you know, today, I would like to introduce to you.
1. Unbalance measurement
The magnitude of an uneven measurement of a plane in a plane is not related to an unbalanced Angle. It is equal to the product of the unbalanced mass and its center of mass to the rotor axis, and the unbalance measure is GMM or GCM, commonly known as the "double cross product".
2. Unbalanced phase
The angular value of the unbalanced mass relative to the given polar coordinates on the rotor of the dynamic Balancing Machine.
The unit is GMM. When static imbalance is equal to the mass eccentricity of the rotor, the unit is mu m.
4. Initial unbalance
Uneven measurement on the front rotor of the Balancing Machine.
5. Allowable unbalance
The residual unbalance of the rotor allowed for the normal operation of the rotating machinery. When the indicator is expressed in an unbalanced degree, it is referred to as allowable imbalance (also known as the non-equilibrium rate).
6. Residual inequality
Balance calibrated residual unbalance on the rotor.
7. Calibration radius of dynamic Balancing Machine
The distance from the center of mass to the rotor axis is corrected on the correction plane, which is generally expressed in mm.
The method of expression of the sensitivity and precision of the Balancing Machine has been varied. In general, the precision of the so-called instrument instrument is indicated by the percentage of the value or the full range of the amplitude error, and the phase error is often expressed.
But for dynamic Balancing Machine, if not expressed in the precision balance calibration instructions, and use of the rotor allowable amount of unbalance remaining within a certain limit, then for the initial rough measure of the rotor, the error is too strict, for small initial rough measure of the rotor, this error appears very loose again. In addition, even if there is a certain amplitude and phase error, the residual unbalance measurement will decrease gradually within a certain limit, but it can't be any smaller when it reaches a certain limit. On the other hand, the so-called sensitivity is an indication of an indication of an instrument that increases the amount of inequality that must be applied by a scale, which varies with the rotor quality.