ECCENTRIC SHAFT JOINT STRUCTURE AND SINGLE-SHAFT ECCENTRIC SCREW PUMP EQUIPPED THEREWITH

摘要

PROBLEM TO BE SOLVED: To provide an eccentric shaft joint structure for securing a service life similar to that used under normal pressure without shrinking, deforming or breaking a rubber cover or a seal member under high pressure even when air resides in a space portion inside the rubber cover or the seal member. SOLUTION: A space between an end 2a of a rotor 2 and an end 11a of a coupling rod 3 and a space between an end 13a of the coupling rod 3 and and an end 4a of a driving shaft 4 are covered with the rubber cover 18 or an O-ring seal 19, including a joint pin 14. lubricating oil is filled in the space portion (s) of the rubber cover 18 or the O-ring seal 19 and a piston 17 is fitted through piston holes 11d, 13d provided in the ends 11a, 13a of the coupling rod. COPYRIGHT: (C)2006,JPO&NCIPI