Volume flowmeter with high-level elliptical gear rotor, the flowmeter consists of 3 parts: crust, 2 high-level elliptical gear rotors with the same size and single gathering system. The formula of high-level elliptical gear knot’s curved shape is: r (φ) = [A (1-k)]/ (1-k*cosnφ) ，n is a natural number which is bigger than 2. The flowmeter is using high-level elliptical gear as its rotor; the overall performance is highly improved with its small pulsating movement, low noise, good seal performance and increasing number of single gathering.

    Now we have a kind of non-circular sun-and-planet gearing for comber detaching roller. The gearing consists of two sun gears, one tie bar and planet gears of even quantity. By constructing curves for gear pitches, when the shaft rotate with even speed under single power input, for each cycle (cylinder rotated 360 degrees) the gearing will output variable-speed transmissions, including forward rotation, pause and reverse rotation, which drives detaching roller to revolve with variable-direction and variable-speed based on technological requirements.