Micropump with cam mechanism for axial displacement of the rotor

摘要

The micropump: Stator 4; Rotor 6 slidably and rotatably mounted in the stator at least partially-the rotor comprises a first axial extension 24 having a first diameter D1 and a second diameter D2 greater than the first diameter Includes a second axial extension 26 having; A first valve seal mounted on the stator around the first axial extension, with a first channel 42 in the rotor configured to allow liquid communication across the first valve seal when the first valve is in the open position ( 18) the first valve (V1) formed by; A second valve seal mounted on the stator around the second axial extension (with a second channel 44 in the rotor configured to allow liquid communication across the second valve seal when the second valve is in the open position) A second valve V2 formed by 20); A pump chamber 8 formed between the rotor and the stator and between the first valve seal and the second valve seal; And Cam tracks 22, 22' disposed on one of the rotors or stators to axially displace the rotor relative to the stator as a function of the rotation of the rotor-the cam tracks are valve closing chamber full section 28, valve closing chamber blank Includes a cam system comprising a section 30, a suction section 32, and a discharge section 34-and a cam follower 36, 36' disposed on the other of the rotor or stator, The section includes a discharge holding position 34b defining an axial intermediate position between the valve closing chamber full section and the valve closing chamber blank section for partial delivery of pump cycle capacity during the discharge phase.