To achieve smooth slide motion of a screw without damaging environment.
A screw pump includes: a channel 10 including an inclined channel 13; a screw 18 projectingly provided with a blade 20 to form a continuous spiral surface shape on an outer circumference of a shaft part 19 and delivering water stored at a lower ground side of the channel 10 to a high ground side through the inclined channel 13; a drive means (electric motor 22) rotating the screw 18; a submerged bearing 23 having an insertion port 25 of the shaft part 19 sealed by a mechanical seal 26; an oil supply pipe 33 supplying lubricating oil to a section between the submerged bearing 23 and the shaft part 19 of the screw 18; an oil discharge pipe 34 discharging lubricating oil passing through the section between the submerged bearing 23 and the shaft part 19 of the screw 18; a reservoir tank 35 collecting lubricating oil discharged from the submerged bearing 23; and an oil supply means (oil supply pump 37) circulating and supplying lubricating oil so as to discharge lubricating oil in the reservoir tank 35 from the oil discharge pipe 34 through an inside of the submerged bearing 23 from the oil supply pipe 33.
KAJITA YUKIHIRO
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| JP2002156092A | 2002-05-31 | |||
| JPS323846Y1 | ||||
| JPS345205Y1 | ||||
| JPS50153377U | 1975-12-19 | |||
| JPS29206Y1 | ||||
| JPS4516016Y1 | 1970-07-03 | |||
| JPH05332291A | 1993-12-14 |
Mitsuo Tanaka
Atsushi Maeda
Yoshiyuki Maebori