Product Introduction

Working principle of turbine flowmeter

The working principle of the liquid turbine flowmeter is that the fluid flows through the sensor housing. Since the blades of the impeller have a certain angle with the flow direction, the impulsive force of the fluid causes the blades to have a rotational moment. After overcoming the frictional moment and fluid resistance, the blades rotate. Stable. Under certain conditions, the rotational speed is proportional to the flow velocity. Because the blade has magnetic permeability, it is in the magnetic field of the signal detector (composed of permanent-permanent magnet steel and coil). The rotating blade cuts the magnetic force line and changes periodically The magnetic flux of the coil, so that the two ends of the coil induce an electric pulse signal, and the signal is amplified and shaped by the amplifier to form a continuous rectangular pulse wave with a certain amplitude, which can be transmitted to the display instrument remotely to display the instantaneous flow and cumulative flow of the fluid. quantity. Within a certain flow range, the pulse frequency f is proportional to the instantaneous flow Q of the fluid flowing through the sensor, and the flow equation is: Q=3600×f/k; where:

f——pulse frequency [Hz];

k——meter factor [1/m3] of the sensor, given by the calibration sheet. If the unit is [1/L]

Q——instantaneous flow of fluid (under working condition) [m3/h];

3600——conversion factor. the

The instrument coefficient of each sensor is filled in the verification certificate by the manufacturer, and the k value is set in the matching display instrument to display the instantaneous flow and cumulative total.

Application range

The liquid turbine flowmeter is a precision flow measuring instrument, which can be used to measure the flow and total amount of liquid when matched with the corresponding flow totalizing instrument. Flowmeter housing impeller lost wax casting is widely used in measurement and control systems in petroleum, chemical industry, metallurgy, scientific research, and other fields. Liquid turbine meters equipped with sanitary fittings can be used in the pharmaceutical industry.

Advantages of turbine flowmeter

1. The pressure loss is small, and the impeller has an anti-corrosion function;

2. Using advanced ultra-low power consumption single-chip microcomputer technology, the whole machine has strong functions, low power consumption, and superior performance;

3. Intelligent flow display with nonlinear precision compensation function. The accuracy of the revised formula is better than ±0.02%;

4. The instrument coefficient can be set online by the button and can be displayed on the LCD screen. The LCD screen is intuitive and clear, and has strong reliability;

5. EEPROM is used to protect the cumulative flow and instrument coefficient power failure, and the protection time is more than 10 years;

6. Adopt a high-performance MCU central processor to complete data acquisition, processing, display output, cumulative flow, and instantaneous flow;

7. Realization of convenient man-machine interface with screen display, and data transmission in the form of standard 485;

8. Flowmeter housing impeller lost wax casting adopts a full hard alloy (tungsten carbide) shielded cantilever beam structure bearing, which integrates the rotating bearing and the pressure bearing, which greatly improves the life of the bearing, and can work in a medium with a small amount of sediment and dirt;

9. It adopts a 1Cr18Ni9Ti all-stainless steel structure, (the turbine adopts 2Cr13) and has good anti-corrosion performance;

10. It is easy to maintain, has a self-rectifying structure, is small and light, has a simple structure, and can be assembled and disassembled in a short time;

11. The internal cleaning is simple;

12. Strong anti-magnetic interference and vibration ability, reliable performance, and long service life;

13. The lower limit flow rate is low and the measurement range is wide;

14. On-site display type LCD screen display is clear and intuitive, low power consumption, 3V lithium battery power supply can run continuously for more than 5 years;

15. Corrosion resistance, suitable for acid and alkali solutions.

Detection Systems

Copper Silica Sol Investment Casting