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Abstract: As a new type of positive pump, the differential velocity
4-vane pump is presented. It’s mainly composed of noncircular gear
driving system, hull and two coaxial impeller fixed inside the hull. It
forms compartments of varying volume depending on the movement of
closing and stretching between the two neibouring vane which is driven
by two pairs of noncircular gears to make liquid in and out. The
operation principle of this pump and the designing method of noncircular
gear’s pitch and delivery ports are investigated.The solution to the
trapped liquid and the vane meddling is described.
Key words: Positive pump Differential velocity vane Non-circular
gear
CLC No: TH3
Received
20011016,
received in revised form
20020701
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