Why must the rotor axis of a gear flow meter be horizontal?
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This post was last edited by lxmlq on 2012-5-3 21:23. The rotor axis of waist-wheel flowmeters and turbine flow transmitters should be horizontal. Why? What are the consequences of vertical installation? Everyone is welcome to share their opinions. I have already installed 2 units on-site; one has a rotor axis that is vertical, while the other has a rotor axis that is horizontal. I plan to test to see what the differences are. It mainly discusses whether the rotor axis can be installed vertically and the consequences thereof
Young man, change your font – it’s not readable at all, I can’t see it clearly:lol
Vertical installation subjects the end face of the gear to the effect of gravity, causing it to make extensive contact with the inner surface of the gauge body and resulting in high friction forces. The shaft sleeve inside the rotor essentially plays no role, which increases measurement errors; this effect is not noticeable at high flow rates but becomes apparent at low flow rates. When installed horizontally, the rotor moves around the axis through the shaft sleeve; the measurement errors in this case have already been taken into account during calibration, ensuring accuracy during measurements
Actually, what happens here is that it can measure normally for about 5 minutes, and then suddenly it starts working extremely slowly; once the axis is adjusted to be horizontal, it returns to normal. I called the manufacturer today, but they too couldn’t explain the reason
A volute flow meter is a type of positive displacement flow meter; it operates by the pressure of the fluid acting on the volutes. Due to differences in torque on these volutes, different forces are exerted, which in turn causes the volutes to rotate and thus push the fluid out of the volume chamber. If installed vertically, this can have two effects: 1) it affects the pressure of the fluid acting on the volutes, and an increase in the gravitational potential energy of the fluid leads to errors; 2) due to sealing issues, vertical installation can also cause errors, as the fluid in the volume chamber may leak