The oval gear flowmeter uses mechanical measuring elements to continuously divide the fluid into individual known volume parts, and fill the measuring chamber repeatedly one after another.
A brief analysis of oval gear flowmeter troubleshooting methods:
The oval gear flowmeter uses mechanical measuring elements to continuously divide the fluid into individual known volume parts, and fill the measuring chamber repeatedly one after another. and the number of times that volume of fluid is discharged to calculate the total flow volume.
Choose materials for oval gear flowmeters
If the flowmeter is used in a relatively clean place, you can also choose a flowmeter made of stainless steel. When installing, try to install it in a horizontal position, and the transmitter should be installed at the output end of the pump to reduce measurement errors. If the measuring medium is mixed with gas, a gas separator should be installed. Then there will generally not be any problems during use. The gear flowmeter mainly has several materials: 1 cast iron, 5 cast steel and 3 stainless steel, which can be used in different occasions.
Troubleshooting methods for gear flowmeters
Because the gear flowmeter is a relatively precise instrument, most of the problems prone to problems are internal, because there are gears inside to clean the flowing liquid. It is easy to get stuck if the speed is required, and there will be problems such as no display or large display fluctuations. Common faults and solutions are as follows: 1. The degree on the display remains unchanged at a certain value. Troubleshooting method: First determine whether it is a fault in the signal feedback system. Cut off the power supply and check whether the signal feedback loop is connected and the voltage is normal. If the fault is not eliminated, the pipeline filter can be cleaned. If the filter or pipe is damaged, the flow meter can be disassembled to check and remove impurities. When disassembling, remember the entry points of the upper and lower gears. When installing, install them as they are. 2. The degree on the display is unstable. Troubleshooting method: Check whether there is vibration in the flow display system or turn the flow meter gear by hand to see if the display reading changes. If there is no change, it may be that the magnetism of the flowmeter's magnetic sensor is weakened, resulting in the inability to generate a limited feedback signal. 3. The error is relatively large when the flow rate is small. Troubleshooting method: It may be that the gear sleeve is worn or the flowmeter housing is deformed due to medium corrosion. At this time, you can generally hear the flow meter clicking when it is working. 4. The error deviates greatly or is very small from the actual error. Troubleshooting method: The reason is that the fluid may contain gas or the zero signal voltage is abnormal, and the flow meter needs to be stopped. Re-calibration 5. Liquid leakage troubleshooting method: The oval gear flowmeter is leaking. This fault is definitely caused by the aging of the sealing ring. Just replace the sealing ring.
Summary of Oval Gear Flowmeter
When using an oval gear flowmeter, it is important to note that the temperature of the measured medium cannot be too high, otherwise it will not only increase the measurement error, but also cause the gear to become stuck. For this reason, the gear flowmeter should be used within the specified operating temperature range of the instrument. After long-term use, the internal gears of the flow meter will be corroded and worn, affecting the measurement accuracy. Therefore, you should always pay attention to it and disassemble it regularly for inspection. If conditions permit, perform regular calibration. The flow meter relies on the pressure of the measured medium to push the oval gear to rotate for measurement. The greater the viscosity of the medium, the smaller the leakage amount will be from the gap between the gear and the metering space. Therefore, the greater the stickiness of the nuclear measurement medium, the smaller the leakage error, and the more beneficial it is to the measurement. flowThe high metering accuracy is suitable for measuring the flow of high-viscosity media, but it is not suitable for fluids containing solid particles (solid particles will jam the gears, making it impossible to measure the flow). If gas is included in the measured liquid medium, measurement errors will occur.
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