The gearbox valve body DL501 0B5 is suitable for Audi A4 A5 auto parts

1. Operating torque Operating torque is the most important parameter for selecting the valve electric device, and the output torque of the electric device should be 1.2 ~ 1.5 times of the maximum operating torque of the valve.

2. There are two main engine structures for operating the electric device of the thrust valve: one is to directly output torque without a thrust disk; The other is to configure a thrust disc, and the output torque is converted into output thrust through the valve stem nut in the thrust disc.

3. Number of turns of the output shaft The number of turns of the output shaft of the valve electric device is related to the nominal diameter of the valve, the thread pitch of the valve stem and the number of thread heads, and should be calculated according to m = h/zs (m is the total number of turns that the electric device should meet, h is the opening height of the valve, s is the thread pitch of the valve stem transmission, and z is the number of thread heads of the valve stem).

4, stem diameter For multi-turn open-stem valves, if the maximum stem diameter allowed by the electric device cannot pass through the stem of the valve, it cannot be assembled into an electric valve. Therefore, the inner diameter of the hollow output shaft of the electric device must be larger than the outer diameter of the stem of the exposed stem valve. For some rotary valves and hidden stem valves in multi-rotary valves, the passage of stem diameter is not necessary, but the stem diameter and keyway size should be fully considered in the selection, so that they can work normally after assembly.

5, if the opening and closing speed of the output speed valve is too fast, it is easy to produce water hammer phenomenon. Therefore, the appropriate opening and closing speed should be selected according to different service conditions.

6, valve electric device has its special requirements, which must be able to limit the torque or axial force. Usually, the valve electric device adopts a coupling that limits torque. When the specifications of the electric device are determined, its control torque is also determined. Generally, it runs within a predetermined time, and the motor will not be overloaded. However, if the following situations occur, it may lead to overload: first, the power supply voltage is low, and the required torque cannot be obtained, so that the motor stops rotating; Second, the torque limiting mechanism is wrongly set to be greater than the stopping torque, resulting in continuous excessive torque and stopping the motor; Third, intermittent use, resulting in heat accumulation, exceeding the allowable temperature appreciation of the motor; Fourth, the circuit of the torque limiting mechanism fails for some reason, which makes the torque too large; Fifth, the operating environment temperature is too high, which makes the heat capacity of the motor decrease relatively. [1]

7. The valve electric device is an indispensable device to realize program control, automatic control and remote control of the valve, and its movement process can be controlled by the stroke, torque or axial thrust. Because the working characteristics and utilization rate of valve electric device depend on the type of valve, the working specification of the device and the position of the valve on the pipeline or equipment, it is very important to choose the valve electric device correctly to prevent overload (the working torque is higher than the control torque).