Search International and National Patent Collections
|1. (WO2018198798) ROTOR FOR GEAR PUMP, AND GEAR PUMP|
|Applicants:||NIDEC TOSOK CORPORATION
|Title:||ROTOR FOR GEAR PUMP, AND GEAR PUMP|
This rotor for a gear pump comprises an inner rotor and an outer rotor. One member of the inner rotor and the outer rotor comprises a group of tooth bottom sections each having an edge along a first setting curve, and a group of tooth tip sections each having an edge along a second setting curve that is different from the first setting curve, said setting curves being envelopes that are obtained by moving a forming circle along a trochoid curve based on one base circle, said forming circle being smaller than the base circle. When the volume of a cell is maximized, said cell being a space that is formed between two neighboring teeth of the inner rotor and two neighboring teeth of the outer rotor, the maximum length of said cell in a radial direction of the inner rotor is greater than either of the width of a gap between neighboring teeth in the inner rotor and the width of a gap between neighboring teeth in the outer rotor.