| 摘要 |
FIELD: manufacture of pumps. SUBSTANCE: eccentric worm pump has housing 1 provided with suction branch pipe 6 and delivery branch pipe 7; housing 1 embraces suction chamber 8 and delivery chamber 9. Mounted in housing are stator 2 and rotor 3 embraced by stator 2 and driven by motor. To ensure multi-phase supply, section 9a of delivery chamber 9 is brought in communication with suction chamber 8 through liquid bypass line which is fitted with valve actuated by control member which is set in action due to difference in pressures in delivery chamber 9 and suction chamber 8; at difference of pressure set at dry stroke, valve is open and at difference of pressures set at feeding the liquid, valve is closed. EFFECT: enhanced reliability. |
