| 摘要 |
FIELD: engines and pumps. ^ SUBSTANCE: proposed unit consists of two interconnected plunger-type hydraulic pressure boosters 1, 10. Note here that casing of boosters 10 are made up of two cylinders arranged aligned one in another to make chambers 20 and 21 between inner cylinder outer surface and outer cylinder inner surface, said chambers making shrouding shells. Booster 1 is communicated with booster 10 to force working fluid in shrouding shells 20 and 21 and working chambers 11 and 12. So, liners 31 and 32 of booster 10 are at invariable inside and outside pressure in suction strokes that allows their unloading. Outside pressure is equal 1/2 of inside pressure in pump strokes. ^ EFFECT: higher reliability, longer life. ^ 2 cl, 1 dwg |
