The dynamic balancing machine is based on the calculation of the original unbalance amount and unbalanced phase angle on the radius of the rotor. The point at the appropriate radius at the angle is a "light point". If a weight is added to the point, the mass is, if the mass-diameter product vector If it is satisfied, the rotor is balanced. This method is called the reverse point counterweight method.
主要 The main performance of the dynamic balancing machine is expressed by two comprehensive indicators: the minimum remaining unbalance amount and the reduction rate of the unbalance amount. The former is the minimum value of the remaining imbalance that the rotor can achieve with the balance function, it is an index to measure the highest balance capacity of the balance machine; the latter is the ratio of the reduced imbalance amount to the initial imbalance amount after a correction, and it is a measure of the balance efficiency The indicator is generally expressed as a percentage.
The size of the balance plate should be designed for different rotor configurations. For different rotors, the structure of the balance disk is similar. It is also possible to process the trapezoidal grooves of the balance disc, M6 screw holes, graduations, etc. directly on the end face of the rotor without using the balance disc. That is to say, consider using this method to balance the rotor product design or product improvement design. When using the balance disk method to balance the rotor, you only need to know the starting position of the balance weight on the balance disk. After picking up the unbalance amount, you can calculate the position of the balance weight when the rotor is balanced, and move the balance weight to the corresponding position. , You can precisely balance the rotor. The method is simple in operation and ideal in effect, and is suitable for widespread promotion.
Application characteristics of dynamic balancing machine For the convenience of counterweight installation, a number of uniformly distributed screw holes can be drilled on the rotor being balanced. During calibration, two screw holes adjacent to the light point can be added with a mass of equal and sum. weight. If the following vector relationship is satisfied, the rotor can also be brought into dynamic equilibrium. This is the balancing algorithm. According to the number of screw holes drilled by the balanced rotor, there are generally a three-point counterweight method and a four-point counterweight method. The three-point method distributes three screw holes at three positions of the rotor, and the four-point method distributes four screw holes at four positions. It should be explained here that, generally speaking, the position is arbitrarily selected, but our calibration work is performed after the dynamic balance test work, so the general choice is the position of the phase detection sensor during the dynamic balance test.
In modern machinery, due to the wide application of flexible rotors, people have developed flexible rotor balancing machines. This type of balancing machine must perform stepless speed regulation within the rotor's working speed range; in addition to measuring the vibration or vibration force of the support, it can also measure the flexure and deformation of the rotor. Flexible rotor balancing machines are sometimes installed in vacuum protection chambers to suit the balance of rotors such as steam turbines. They are equipped with huge auxiliary equipment such as vacuum pumping systems, lubrication systems, lubricant degassing systems, and computer systems for data processing.