Roundel structure for four-compression-chamber diaphragm pump with multiple effects

摘要

A cylindrical or inverted frustoconical eccentric roundel structure for a four-compression-chamber diaphragm pump includes an annular positioning groove, a vertical or inverted frustoconical flank, and a sloped top ring extending between the annular positioning groove and the vertical or inverted frustoconical flank. By providing the sloped top ring, the oblique high frequency pulling and squeezing phenomenon that occurs in a conventional tubular eccentric roundel is completely eliminated.

主权项

1. A roundel structure for a four-compression-chamber diaphragm pump, said roundel structure including a roundel mount situated on a lower side of a pump head body and four eccentric roundels mounted on the roundel mount to extend through four operating holes in the pump head body, said four-compression-chamber diaphragm pump having a motor with a motor housing to which the pump head body is fixed, a diaphragm membrane fixed to the four eccentric roundels through the four operating holes and situated on an upper side of the pump head body, and four pumping pistons arranged to be moved in a pumping action upon movement of the diaphragm membrane, the roundel mount engaging a wobble plate such that rotation of the wobble plate by the motor causes the roundel mount to wobble, resulting in sequential up and down movement of the four eccentric roundels, the sequential up and down movement of the eccentric roundels causing sequential, reciprocating movement of four piston acting zones in the diaphragm member and the four pumping pistons, and the diaphragm membrane further including four annular downwardly-projecting positioning protrusions each arranged to be inserted into a respective annular positioning groove in a top surface of each of said eccentric roundels, wherein:
a section of the top surface of each eccentric roundel is inclined relative to horizontal to form a sloped top ring between a respective said annular positioning groove and a vertical or inverted frustoconical flank of the respective eccentric roundel.