Piston type oil flowmeter| Suzhou Quality Flow Meter Sales Manufacturer

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1. Concept of flow rate and classification of flow meters

Concept of flow rate Flow rate size refers to the quantity of fluid flowing through a certain section of a pipeline per unit time, i.e. instantaneous flow rate. The total amount of fluid flow through the pipeline during a certain period of time, that is, the cumulative value of instantaneous flow during a certain period of time, is called the total amount (cumulative flow). Flow rate and total amount can be expressed in terms of mass or volume. The flow rate represented by quality is called mass flow rate, denoted by the symbol M; The flow rate expressed in volume is called volumetric flow rate, denoted by the symbol Q. If the density of the fluid is ρ, the relationship between volumetric flow rate and mass flow rate is: mass flow rate (M)=volumetric flow rate (Q) × density (ρ). Among the units of flow, volumetric flow units are commonly used in m ³/h, L/h, and m ³/s, mass flow units are commonly used in T/h and kg/h, volumetric total units are commonly used in m ³, and mass total units are commonly used in T. The classification of flow meters is called flow meters, which measure fluid flow. There are many classification methods for flow meters, and the following is a rough classification: velocity flow meters. Velocity flow meters are instruments that calculate flow based on the measurement of fluid velocity in pipelines. This type of flowmeter measures the flow velocity of the fluid in the pipeline, and then calculates the flow rate based on the flow velocity and pipeline cross-sectional area. Common speed flow meters include turbine flow meters, which use the rotational speed of the turbine in the fluid to measure flow velocity and calculate flow rat

e. Vortex flowmeter: measures flow velocity by utilizing the frequency of vortices generated when fluid flows through a vortex generator. Electromagnetic flowmeter: Based on Faradays law of electromagnetic induction, the flow velocity and flow rate are calculated by measuring the induced potential generated by the movement of fluid in a magnetic field. Rotor water meter: used to measure the flow rate of water, reflecting the size of the flow rate through the rotation speed of the rotor. Differential pressure flowmeter: measures flow rate by utilizing the pressure difference generated when fluid flows through a throttling assembly. Weir flowmeter: calculates the flow rate by measuring the water level difference generated when the fluid flows through the weir plate. A volumetric flowmeter is an instrument that calculates flow based on the fixed volume of fluid discharged per unit time. This type of flowmeter calculates the flow rate by measuring the volume occupied by the fluid over a certain period of time. Common volumetric flow meters include elliptical gear flow meters, which measure flow by rotating two interlocking elliptical gears in a fluid. Lumbar wheel flowmeter: Similar to elliptical gear flowmeter, but using a lumbar wheel shaped rotor. Scraper flowmeter: measures flow rate by the movement of the scraper in the fluid flow. Piston flowmeter: measures flow rate by utilizing the reciprocating motion of the piston in the fluid. A mass flow meter is a flow meter that measures the mass flowing through it. This type of flowmeter directly measures the mass flow rate of the fluid and is not affected by changes in fluid density, temperature, pressure, etc. Common mass flow meters include inertial force mass flow meters,

Piston type oil flowmeter

1. Concept of flow rate and classification of flow meters

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