The present application relates to the field of gas flow standard device, especially to active horizontal disc-shaped
piston gas flow standard device and testing method.The technical scheme is as follows: the active horizontal disc-shaped
piston gas flow standard device includes driving module, guide module, metering module and
control system module, the driving module includes
servo motor,
coupling and
ball screw, the
servo motor is connected with the
ball screw through the
coupling, the
ball screw is provided with screw nut, and the screw nut is connected with the
piston disc support rod.Through the structural design of horizontal disc-shaped piston and balance cavity, the
gas pressure difference on both sides of the piston is offset, the load of the driving unit is reduced, the operation efficiency and service life of the device under
high pressure working condition are improved, the sealing reliability of the sealing
assembly is enhanced, gas leakage is prevented, the sealing state is diagnosed in real time and safety protection is provided when abnormal, and the long-term stability of gas flow output, the safety of device operation and the accuracy of measurement results are ensured.