Radial piston pump

US5156531A · kind A · utility

Assignee

• Zahnradfabrik Friedrichshafen AG · DE

Inventors

• Peter Schmid · Santa Fe Springs, US
• Gunter Pannek · Bobingen, DE
• Klaus Weckbrodt · Heubach, DE
• Michael Reichenmiller · Schwäbisch Gmünd, DE

Key dates

• Filing date: Jan 29, 1991
• Grant date: Oct 20, 1992
• Expiry date: Jan 29, 2011

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04B2205/171
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

This invention relates to a radial piston pump in whose suction bore (22) a load regulator (24) is inserted. The pump is to be regulated so that a constant stream and, as required, a variable large regulating stream will be available. For this purpose, a spool valve (26) that can be activated electromagnetically is inserted in a bore (23) that intersects the suction bore (22) and that spool valve can establish a connection to a suction duct (28) that is connected to a cam chamber (14) to make the regulating stream available by means of a collar (33). From suction bore (22) there furthermore branches off a shutter bore (34) that is likewise connected to the cam chamber (14) via a ring groove (35) and additional bores (36) in the pump housing (3). Shutter bore (34) limits the constant stream. The regulating stream is supplied to a consumer with fluctuating power consumption, for example, a hydrofan, that is powered with an rpm proportional to the cooling water temperature. The constant stream is used to supply, for example, a level regulation and lubricating stream. The load regulator (24) as well as the oil guides (bores, ducts, ring grooves) are machined into a cover (2).