Control pintle including a thrust member for a radial flow devic

Details Control pintle including a thrust member for a radial flow devic Control pintle including a thrust member for a radial flow devic

1986-12-23

1988-11-08

Neils, Paul F.

Motors: expansible chamber type

Three or more cylinders arranged in parallel radial or...

Control valve seating surface contact maintained by fluid...

91486, 91492, 91498, F01B 1306

Patent

active

047827378

ABSTRACT:
A fluid machine such as a pump, compressor, engine, motor or transmission has working chambers in a rotor and a central rotor-hub is provided in the rotor for the reception of a control pintle therein. The control pintle has control ports for the control of flow of fluid into and out of the working chambers of the rotor. Pressure fields form in the clearance between the rotor hub and the control pintle especially around the control ports. Leakage flows from the pressure fields through portions of the clearance between the rotor--hub and the control pintle which reduces the efficiency of the machine. Therefore means are provided in the control pintle to press those portions of the faces of the rotor hub and of the control pintle, which have those local pressure fields, together or to narrow the clearance between these faces in the respective areas where those pressure fields are located in order to reduce the leakage through the clearance between the faces of the rotor hub and the control pintle. In detail, the invention provides, in the central pintle, radially directed thrust chambers with thrust bodies therein at the proper locations and sizes to obtain an economic device with only small leakage.

REFERENCES:
patent: 1998984 (1935-04-01), Ferris
patent: 2431175 (1947-11-01), Hoffer
patent: 3046906 (1962-07-01), Budzich
patent: 3768377 (1973-10-01), Engel et al.
patent: 3800672 (1974-04-01), Kobald
patent: 3810418 (1974-05-01), Bosch
patent: 4286927 (1981-09-01), Boehringer

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