The working principle and technical advantages of the rotameter

Abstract: The information on the working principle and technical advantages of the rotameter is provided by the excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Working principle The rotameter consists of two parts. One of the rotameters is a conical tube that gradually expands from bottom to top; the other is placed in the conical tube and can move freely up and down along the center line of the tube. rotor. Rotameter when measuring. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following are the details of the working principle and technical advantages of the rotor flowmeter. Working principle The rotameter consists of two parts. One of the rotameters is a conical tube that gradually expands from bottom to top; the other is placed in the conical tube and can move freely up and down along the center line of the tube. rotor. When measuring the flow of the fluid, the fluid to be measured flows in from the lower end of the conical tube, and the flow of the fluid impinges on the rotor and generates a force on it (the magnitude of this force varies with the flow); when the flow is large enough , the resulting force lifts the rotor and raises it. At the same time, the measured fluid flows through the annular section between the rotor and the conical tube wall. At this time, there are three forces acting on the rotor: the dynamic pressure of the fluid on the rotor, the buoyancy of the rotor in the fluid and the gravity of the rotor itself. When the flowmeter is installed vertically, the center of gravity of the rotor coincides with the axis of the tapered tube, and the three forces acting on the rotor are in a direction parallel to the tube axis. When the three forces reach equilibrium, the rotor floats smoothly at a certain position in the cone. For a given rotameter, the size and shape of the rotor have been determined, so its buoyancy in the fluid and its own gravity are known to be constant, only the dynamic pressure of the fluid to the float varies with the flow velocity of the incoming flow. of. Therefore, when the incoming flow velocity becomes larger or smaller, the rotor will move up or down, and the flow cross-sectional area of ​​the corresponding position will also change. Until the flow velocity becomes the corresponding speed when the flow velocity becomes balanced, the rotor will be stable at the new position. For a given rotameter, there is a one-to-one correspondence between the position of the rotor in the cone and the flow rate of the fluid through the cone. In order to make the rotor not touch the tube wall when moving up and down the centerline of the conical tube, two methods are usually used: one is to install a guide mandrel in the center of the rotor to keep the rotor on the centerline of the conical tube. Moving up and down, the other is that there are a series of inclined grooves on the edge of the rotor disc. When the fluid flows through the rotor from bottom to top, it bypasses the rotor while passing through the inclined groove to generate a reverse thrust, so that the rotor does not move around the center line. Stop and rotate to keep the rotor from hitting the pipe wall during operation. The rotor material of the rotameter can be made of stainless steel, aluminum, bronze, etc. The technical advantage relies on the advantages of small pressure loss and large detection range, and has become a very commonly used flow measuring instrument in industrial control. It is not only easy to use, but also has the advantages of strong compatibility. It is especially suitable for medium flow measurement with low flow rate and small flow. Rotameter has local display type and intelligent remote transmission type, with pointer display, instantaneous flow, cumulative flow, liquid crystal display, upper and lower limit alarm output, cumulative pulse output, standard two-wire 4-20mA current output and other forms , providing users with a very broad choice space. In addition, the instrument adopts high-quality MCU micro-processing system, which ensures the excellent performance of the rotor flowmeter in various application places. Over the years, the various excellent performance and reliability of the rotor flowmeter, as well as the good performance-price ratio, have been widely favored by petrochemical, steel, electric power, metallurgy, light industry and other industries. 1. Suitable for small pipe diameter and low flow rate 2. Reliable work, low maintenance, long life 3. Not high requirements for downstream straight pipe sections 4. Wide flow range of 10:15. Local pointer indication is close to Linear 6. The intelligent indicator has LCD liquid crystal display, which can display instantaneous and cumulative flow, and can also output pulse and output alarm 7. With temperature compensation 8. There are local type, remote type, jacket type, horizontal type , explosion-proof type, corrosion-resistant type, etc. 1. The structural metal tube rotameter is mainly composed of three parts: a, indicator (intelligent indicator, local indicator) b, float c, conical measuring chamber The above is all of this article content, you are welcome to inquire about the flowmeter selection, quotation and other content of our factory. 'The working principle and technical advantages of the rotor flow meter'

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