Power plants – Pressure fluid source and motor – Having plural energy input means – pumps or diverse pump outlets
Patent
1996-09-19
1998-12-01
Lopez, F. Daniel
Power plants
Pressure fluid source and motor
Having plural energy input means, pumps or diverse pump outlets
72153, 417372, 417205, F16D 3102
Patent
active
058423435
ABSTRACT:
A hydraulic axial piston machine, such as a high-pressure water discharge pump, may include a first subassembly having a plurality of cylinder-piston units arranged at a distance from, and either parallel to or at an acute angle to, a central axis. The cylinder-piston units may be circumferentially offset, relative to each other, around the central axis by a predetermined angle. The hydraulic axial discharge pump may also include a second subassembly which may be coaxially positioned and arranged for rotation around the central axis on a drive shaft and which may have a force-transmitting connection with the cylinder-piston units to receive oscillating drive forces of the cylinder-piston units. The drive shaft, which may include at least two rotationally coupled longitudinal sections, may extend coaxially to the central axis from its drive input end through at least one of a corresponding central opening of the first subassembly and of the housing to a head-subassembly. The hydraulic axial piston machine may include a filler pump and a lubricant pump each coupled to separate sections of the drive shaft for providing a rotational drive connection. A flow path of the filler pump may be connected in series with a main flow path of the axial discharge pump to deliver substantially the entire admission flow to the hydraulic axial discharge pump at an enhanced hydraulic input pressure to the cylinder-piston units sufficient for avoiding cavitation.
REFERENCES:
patent: 2408716 (1946-10-01), Witchger
patent: 2845029 (1958-07-01), Gratzmuller
patent: 3092307 (1963-06-01), Heidorn
patent: 4041703 (1977-08-01), Knapp
patent: 4188859 (1980-02-01), Van Wagenen et al.
patent: 4281971 (1981-08-01), Kouns
BACKE, "Grundlagen der Oelhydraulik" (Fundamentals of Oil Hydraulics), Institut fur Hydraulische und pneumatische Antriebe und Steuerungen der Rheinisch-Westfalischen Technischen Hochschule Aachen, 2nd edition, 1974, p. 116, with illustrations 4-22 to 4-25.
Hydrowatt Systems Ltd.
Lopez F. Daniel
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