Measurement of elliptical gear flowmeter is mainly composed of two meshing elliptical gear and shell (measurement room) composed of oval gear in the measured medium pressure difference of p=pl-p2, which make the rotation torque. 在(a)所示位置時,由于P1>P2,在P1和P2的作用下所產(chǎn)生的合力矩使輪A產(chǎn)生順時針方向轉(zhuǎn)動,把輪A和殼體間的半月形容積內(nèi)的介質(zhì)排至出口,并帶動輪B作逆時針方向轉(zhuǎn)動,這時A為主動輪,B為從動輪,在 (b)上所示為中間位置,A和B均為主動輪;而在(c)上所示位置,P1和P2作用在A輪上的合力矩為零,作用在B輪上的合力矩使B輪作逆時針方向轉(zhuǎn)動,并把已吸入半月形容積內(nèi)的介質(zhì)排至出口,這時B為主動輪,A為從動輪,與 (a)上所示情況剛好相反.如此往復(fù)循環(huán),輪A和輪B互相交替地由一個帶動另一個轉(zhuǎn)動,將被測介質(zhì)以半月形容積為單位一次一次地由進口排至出口. Obviously, on the map (a), (b), (c) shows, only said elliptic gear turned 1/4 weeks, and the discharge of the measured medium is a half moon volume. Therefore, the elliptical gear per week to the ratio of measured medium quality for half 4 times the product description the volume flow of Q through the oval gear meter meteor: Q=4n V 0 type: n - rotation frequency of elliptical gears (Rev / sec);
The 0 part of the volume V - half moon (beckham. ).
In this way, as described in the elliptical gear flowmeter half product 0 V under certain conditions, as long as the measured elliptical gear rotation speed n, can know the measured medium flow.