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China Gear Pump , Cycloid Gear Pump: How To Work?



The China Gear Pump
clarifies the principle of the cycloidal gear pump: the inner and
outer rotors are one tooth apart, the inner rotor is six teeth, and the outer
rotor is seven teeth. Since the inner and outer rotors are multi-toothed, this
forms a number of sealed volumes. When the inner rotor rotates around the center
O1, the outer rotor is driven to rotate in the same direction around the outer
rotor center O2. At this time, the sealed volume C (the portion of the female
line in the figure) formed between the inner rotor tooth tip A1 and the outer
rotor tooth valley A2 gradually expands as the rotor rotates, so that a partial
vacuum is formed, and the oil is dispensed from the oil. The window b is sucked
into the sealed chamber, and the closed volume is maximized at the A1' and A2'
positions, and the oil absorption is completed. When the rotor continues to
rotate, the sealed volume filled with oil gradually decreases, and the oil is
squeezed, so that the oil is discharged through the other oil distribution
window a, to the other tooth of the inner rotor and the tooth concave A2 of the
outer rotor. When all the meshing is completed, the oil pressure is completed,
and each inner circumference of the inner rotor is completed by the inner rotor
tooth top and the outer rotor tooth valley. The suction and pressure oil are
completed once, and when the inner rotor continuously rotates, the completion is
completed. The suction and discharge work of the hydraulic pump.

  

The outer rotor tooth shape of the cycloid gear pump is an
arc, and the inner rotor tooth shape is an equidistant line of a short outer
cycloid. Therefore, it is also called an internal meshing cycloid gear pump,
also called a rotor pump.

  

Cycloidal gear pumps have many advantages, such as compact
structure, small size, few parts, high speed up to 10000r/mim, smooth motion,
low noise and high volumetric efficiency. The disadvantages are large flow
pulsation, complicated manufacturing process of the rotor, etc., and powder
metallurgy press molding has been used at present. With the development of
industrial technology, the application of cycloidal gear pumps will become more
and more extensive. The cycloidal gear pump can be used for hydraulic
motors.
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