Document Type and Number:
Japanese Patent JPS6228317
Kind Code:
B2
Abstract:
A hydraulic or pneumatic aggregate wherein an end face of the rotor defines a control gap with the annular control face of a thrust member which is movable axially in a one-piece cover of the housing and defines with the housing inner and outer annular pressure chambers wherein the fluid acts to urge the control face toward the end face of the rotor. The thrust member has a control portion which is provided with the control face and has an end face adjacent to the outer pressure chamber, an eccentric intermediate portion having an end face which is adjacent to the inner pressure chamber, a third portion which is coaxial with the control portion, and first and second passages which respectively extend between the control face and the end faces of the control portion and intermediate portion. The control face has first and second fluid pressure zones which respectively include the ends of the first and second passages, and the end faces of the control portion and second portion respectively have third and fourth fluid pressure zones. The distances between the centers of first and second zones and the axis of the control portion respectively equal or closely approximate the distances between the axis of the control portion and the centers of the third and fourth zones. This reduces the likelihood of overheating of the aggregate due to direct contact between the control face and the rotor and is achieved by appropriate selection of the diameters of the three portions of the thrust member, the eccentricity of the second portion, the outer diameter of the control face and the configurations of the ends of first and second passages in the control face.
Inventors:
KAARU AIKUMAN
Application Number:
JP5384573A
Publication Date:
June 19, 1987
Filing Date:
May 15, 1973
Export Citation:
Assignee:
EICKMANN KARL
International Classes:
F03C1/04; F01L7/02; F03C1/253; F03C1/32; F03C1/38; F04B1/10; F04B1/107; F04B1/113; F04B53/10