| 摘要 |
PURPOSE: A screw pump for high pressure is provided to pump the fluid of high pressure by maintaining the recess regular between pitches formed on a master and a slave spiral line parts while operating a pump. CONSTITUTION: A screw pump is composed of a first screw shaft(2) having a first and a second helical gears(4,5) twisted with each other in different directions and a second screw shaft(3) having a third helical gear(6) rotating by being interlocked with the second helical gear and twisted in the same direction as the first helical gear and a fourth helical gear(7) rotating by being interlocked with the second helical gear and twisted in the same direction as the first helical gear. Herein, the back up force generated in the first screw shaft is set off at the first and the second helical gears and maintains the position of the first screw shaft set up at the first stage. And the forward movement force generated in the second screw shaft is set off at the third and the fourth helical gears and maintains the position of the second screw shaft set up at the first stage. Accordingly, the pumping by high pressure of the fluid is possible by maintaining recess between the pitches(211,311) formed on the first and the second spiral line parts even while the screw pump is operated.
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