Load accounting method for servo servo system such as data lathe milling machine

At present, there is only a load accounting method for servo servo systems such as data lathe milling machines. It is difficult to find the load accounting theory of the servo servo system of CNC presses, which is not conducive to the development of CNC presses in China. The servo system of the CNC press is a point control mode. Its working characteristics are frequent and quick start braking, and there is no cutting resistance in the work. It is mainly to overcome the inertia resistance of the load when braking quickly. The servo system of the CNC lathe is a continuous control mode, and the work speed of the worktable is required to overcome the cutting resistance.

Since the working state of the servo servo servo system of the numerical control press is different from that of the CNC lathe milling machine, the load calculation method is different. In the design of the servo servo system of the numerical control press, the load accounting of the servo system must be carried out, so as to fully explain whether the motor rotor inertia and the load inertia of the servo system match in the theoretical calculation. Whether the fast start braking and the constant speed rotation can be realized under the action of the load torque, whether the motor overheating and burning will occur in the frequent start braking state, so as to determine whether the selected servo motor is applicable, and the whole Whether the servo system can meet the predetermined design requirements. The load inertia of the motor that is accustomed to the motor load can be divided into two parts: the rotating part, that is, the inertia of the rolling screw and the moving part, that is, the inertia of the moving table. The load inertia of the motor is the calculation result. The load inertia of the motor should be less than the rotor inertia of the selected motor, so as to ensure that the fast response performance of the motor is not affected. The load torque of the motor load torque can be divided into friction torque and inertia torque. When rotating at a constant speed, the motor is only affected by the friction torque of the load, and during acceleration and deceleration, the motor is not only subjected to friction torque. The role is also affected by the inertia moment caused by overcoming the inertia of the load. (Finish)

Air Preheaters (APH)

An air preheater (APH) is a device used to heat air, commonly used in industrial boilers, thermal power plants, and other thermal energy facilities. APH improves the thermal efficiency of the boiler by transferring heat from the flue gas to the air entering the boiler through heat exchange with it.