The rotary piston flowmeter consists of components such as the housing and piston mechanism. The counter is isolated from the oil and rotates magnetically. When the flow meter is connected to the pipeline and oil flows through, the pressure difference between the inlet and outlet will push the piston to rotate. At this time, the magnetic coupling connected to the piston also rotates. Since the number of revolutions of the piston is proportional to the amount of oil flowing through the flow meter, the number of revolutions of the piston recorded by the counting mechanism is a multiple of the amount of oil flowing through the flow meter.

This product is based on the principle of continuously filling and emptying the measuring chamber (V1+V2) for measurement. The measuring mechanism consists of a covered measuring chamber, a rotating piston, and a partition. The slotted piston has upper and lower piston pins, and the partition is radially installed between the inlet and outlet. The measuring chamber pin is concentric with the guide ring.

The correction method for errors in the rotary piston flowmeter is:

1. Using the calibrated data after maintenance, make corrections by replacing the paired rotor.

As we all know, the internal mechanism of the rotary piston flowmeter is driven by a rotor, and the speed ratio of the rotor determines the proportional correspondence between the indicator mechanism and the measuring mechanism. We use changing this proportional relationship to achieve the goal of correction.

For example, a piston flowmeter with an accuracy of 0.5 level, after multiple maintenance and grinding, was recalibrated and the calibrated indication error value was -1.27%. Use the method of replacing the paired rotor for correction.

2. Use the method of multiplying by the coefficient k for correction.

At present, many factories use distributed control systems, which have the function of adjusting and modifying the coefficients of variable parameters. We use this coefficient adjustment method to correct errors.

For example, a piston flowmeter with an accuracy of 0.5 level and a range of 0.6~6m3/h, after multiple maintenance and grinding, was recalibrated to indicate a relative error of -1.05%.

Alright, the above is the introduction about the rotary piston flowmeter. I hope it can be helpful to everyone.