Patent ID: 6168401
Filing Date: 2001-01-02
Classification: F02M,F04C

Abstract:
A hydraulic conveying device for conveying liquid comprising a housing having a conveying chamber therein, a suction connection to the conveying chamber; a pressure connection to the conveying chamber; a rotor in the conveying chamber rotatable with respect to the conveying chamber; pump chamber forming devices in the housing communicating with the rotor in the conveying chamber for defining pump chambers of varying volume including increasing size pumping chambers connected with the suction connection and decreasing size pump chambers connected with the pressure connection for conveying fluid from the suction connection to the pressure connection as the rotor rotates; retaining devices in the housing for retaining a quantity of the fluid being conveyed in the conveying chamber when the supply of fluid from the suction connection to the conveying chamber is interrupted, the retaining devices comprise a pressure collecting chamber for retaining fluid and being located substantially above the conveying chamber during operation of the conveying device; pressure ducts from the decreasing size pump chambers which are pressurized by rotation of the rotor, the pressure ducts extending upward at an angle to an imaginary horizontal line extending through the rotation axis of the rotatable rotor, and the pressure ducts extending into the pressure collecting chamber; the pressure collecting chamber being shaped with at least one enlargement cross-section for causing swirling; the pressure collecting chamber is shaped with at least one cross-sectional constriction for causing swirl; at least one partition wall arranged transversely to the flow direction of the fluid in the pressure chamber and having at least one through opening through the partition wall for the fluid, the partition wall being positioned in an area in the pressure chamber between the cross-sectional enlargement and the cross-sectional constriction.