Gear flow meterIt is a volumetric flowmeter that works by accurately measuring the number of times a fluid fills and empties a known fixed volume chamber to calculate flow rate. The specific work process is as follows:

Core structure: The flowmeter has a pair (or more) of meshing gears inside, installed in the measuring chamber of the flowmeter. The shaft of the gear is installed on the bearing and can rotate freely. A very precise gap is formed between the measuring chamber and the gear, ensuring that fluid can only flow through the small space at the gear meshing point.

Fluid drive: When a fluid (liquid) flows through a flowmeter, it impacts the teeth of the gear, creating a pressure difference. This pressure difference drives the gear to start rotating. The fluid flows from the inlet to the outlet of the flowmeter.

Forming a measuring chamber: A pair of meshing gears and the inner wall of the measuring chamber together form several fixed volume "measuring chambers" or "measuring chambers". During the rotation of the gear, these chambers are periodically filled with fluid on the inlet side, then closed and carried to the outlet side as the gear rotates, and finally the fluid is discharged on the outlet side.

Volume measurement: With each gear rotation of a certain angle (usually one meshing), one (or more) known fixed volume of fluid is transported from the inlet to the outlet. This fixed volume is called the 'measurement unit volume'.

Signal conversion and counting:

The rotation of the gear is transmitted to the counter or sensor outside the flowmeter through magnetic coupling (to avoid leakage) or mechanical connection.

Sensors, such as Hall sensors or magnetoresistors, detect every rotation of gears or the passage of every tooth and convert them into electrical pulse signals.

Each pulse represents a fixed volume of fluid passing through the flowmeter.

Traffic calculation:

Instantaneous flow rate: The number of pulses generated per unit time, directly corresponding to the volume of fluid flowing per unit time (e.g. liters/minute or gallons/hour).

Cumulative flow rate: Multiplying the total number of pulses by the volume represented by each pulse yields the total fluid volume flowing through.

In summary, the working principle of a gear flowmeter can be summarized as follows:

Using fluid to drive precision meshing gears to rotate, dividing the fluid into a series of known and fixed small volume units. By accurately counting the number of times these small volume units are transported, the instantaneous flow rate and cumulative flow rate of the fluid can be calculated.