『The principle of rotor flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
1. Double rotor flowmeter II, working principle
Double rotor flowmeter is a uniquely designed volumetric flowmeter specifically used for measuring liquid flow rate. Its working principle is based on the meshing of a pair of spiral rotors with special tooth profiles, and there is no relative sliding between the two, without the need for synchronous gears. The rotational power source of the rotor comes from the small pressure difference generated by the fluid at the inlet and outlet. As shown in the figure below, at a certain moment on a certain cross-section, although a pair of rotors experience different fluid rotational torques, the resultant torque of the rotational torques on all cross-sections remains equal for both rotors. Therefore, the two rotors rotate at a constant speed and equal torque to ensure balanced displacement without pulsation. Each rotor can output 8 times the volume of the cavity per revolution, therefore, the rotational speed of the rotor is proportional to the cumulative flow rate of the fluid, and the rotational speed of the rotor is proportional to the instantaneous flow rate of the fluid. The rotational motion of the rotor is transmitted to the meter counter through a magnetic coupling, and the counter displays the flow rate through the flowmeter (flowing through the pipeline). This design enables the dual rotor flowmeter to have high precision, stability, and reliability, making it suitable for various industrial applications. Dual rotor flow meters can be divided into two forms based on their structure: standard type and axial flow type. The standard dual rotor flowmeter is shown in the figure and is suitable for general liquid flow measurement. Axial flow dual rotor flowmeter has h
_600x400.jpg)
2. Measurement method and instrument selection of rotor flowmeter
The measurement method of rotor flowmeter is mainly based on the principle of variable area, and the flow value is determined by observing the stable position height of the float in the conical tube;
; The selection of instruments should be based on the characteristics of the medium, pipe diameter, flow range, and environmental conditions to choose glass or metal materials, and consider the type of output signal and additional functions. The following is a specific explanation: Basic principle of measurement method: The rotor flowmeter consists of a vertical cone tube and a freely movable float. When the measured medium flows from bottom to top through the conical tube, the float rises due to the action of flow velocity and buoyancy, and the annular gap area increases accordingly. The decrease in flow velocity leads to a decrease in differential pressure until the lift force exerted on the float is balanced with the weight immersed in the fluid. At this point, the height of the float position corresponds to the flow rate, and the flow rate value is directly displayed through magnetic coupling or mechanical indication. Key process: Medium flow: Fluid flows in from the lower end of
Hot Product
Related AD
