Abstract: A transmission for coupling a variable speed engine to a dynamoelectric machine that has three hydraulic units coupled to a mechanical summer, wherein two of the hydraulic units are varied in displacement to control the speed of the third in order to keep the speed of the dynamoelectric machine constant regardless of engine speed.

Abstract: A generator and process for operating a generator in which, upon a bearing failure, a braking force is applied to the rotor shaft responsive to the bearing failure. Preferably, the rotor shaft at the anti-drive end is hollow and the brake is provided in the hollow of the rotor shaft. The rotor can include a plate member extending radially inwardly from the rotor shaft inside of the hollow at the anti-drive end towards the longitudinal axis, with the brake applying the braking force to the plate member. In a preferred aspect, the brake includes a cylindrical support operably connected to the housing and extending into the hollow in the anti-drive end of the rotor shaft, a carrier plate connected to the support and extending radially from the support towards the rotor shaft, a screw thread provided on the support, and a threaded plate mounted on the screw thread, the threaded plate extending radially from the support towards the rotor shaft and being spaced from the carrier plate.

Abstract: A coaxial hydraulic actuator system utilizes a vane pump close coupled to a vane actuator. The vane pump includes a rotatable housing which is perpendicularly movable by a control piston to direct fluid flow through first and second fluid conduits in a pintle port transfer shaft. The transfer shaft conduits are in communication with first and second variable volume compartments in the vane actuator. Thus, controlled movement of the vane pump housing results in corresponding resulting angular movement between the actuator vane and the actuator housing. This relative angular positioning can be used to control the relative positioning between first and second loads, such as the rotors of a dual permanent magnet generator.

Abstract: An oil management system (80) for a case (12) containing at least one rotating element which requires a supply of pressurized oil during rotation in accordance with the invention includes an oil sump (16) within the case for collecting oil after lubrication of the at least one rotating element; a tank (82) within the case for containing oil during lubrication of the at least one rotating element; a first pump (32) having an inlet (90) for supplying pressurized oil to the at least one rotating element; a second pump (26) having an inlet coupled to the sump and at least one outlet (84 and 88) coupled to the first pump for providing pressurized oil to the inlet of the first pump and to an outlet (93) of the tank; the outlet from the tank being coupled to the at least one outlet of the second pump, the tank being disposed above the second pump for providing a pressure head at the at least one outlet of the tank during a non-inverted operation which opposes pressure produced by the second pump; and when oil pressu

Abstract: An integrated drive generator oil supply (50) for providing pressurized oil to a constant speed drive transmission which drives a rotor (40) of an alternating current generator at a constant velocity to generate constant frequency alternating current and to at least one additional apparatus requiring pressurized oil and discharging oil into an oil reservoir during generation of the alternating current in accordance with the invention includes a pump (16) for providing pressurized oil from the oil circuit (28) for providing pressurized oil from the pump to an oil cooling circuit (100) within the alternating current generator for cooling the alternating current generator; an oil circuit (105) for providing oil directly from oil discharged from the oil cooling circuit to at least a part of the constant speed drive transmission which after lubricating the constant speed drive transmission is discharged into the oil reservoir.

Abstract: A mechanical differential is disclosed. The mechanical differential comprises first, second and third ring gears, each having inner and outer surfaces, and first and second planet gears and two carrier rods. The first and second planet gears and first and second carrier rods are disposed within the ring gears. The first and second planet gears are engaged with the inner surface of the first ring gear. The mechanical differential further comprises two sets of planet gears, each of the sets including third and fourth planet gears. One of the sets is rotatably disposed on a third carrier rod and the other of the sets is rotatably disposed on a fourth carrier rod. The two sets of third and fourth planet gears are engaged respectively with the second and third planet gears. The two third output planet gears are further engaged with the inner surface of the second output ring gear and the two fourth planet gears are further engaged with the inner surface of the third ring gear.

Abstract: A lubrication system (40, 60) for an integrated drive generator in accordance with the present invention includes a source of pressurized oil; a carrier (12), rotatably mounted on a axis of rotation, having an inlet (32) for receiving pressurized oil from the source and an outlet (38) for discharging a mixture of oil and air, and rotatably supporting a plurality of planetary gears (14) as the carrier rotates; a plurality of first ports (26), each port being associated with a different planetary gear for supplying only oil to a journal (31) rotatably supporting the associated planetary gear upon rotation of the carrier when pressurized oil is supplied to the inlet, each first port being disposed at a radial position on the carrier at a point displaced from the axis of rotation; and a deaerator (42), in fluid communication with a mixture of air and oil moving radially outward from the axis of rotation during rotation of the carrier to each of the first ports, for removing air from the oil so that only oil moves

Abstract: The hydraulic actuator (35) utilizes the centrifugal head developed in its pressure chambers (52,54) when the housing (44) rotates as a source of pressure. As actuator (35) rotates fluid exits outlet port (56) and passs through a servovalve (64) into chamber (54) to move vane (49) relative to the actuator (35). To move vane (49) in the other direction, fluid exits outlet port (58) and passes through the valve into chamber (52). This self-powered actuator has utility in systems requiring relative angular positioning between a pair of rotating elements such as a pair of voltage regulator rotors in a dual permanent magnet generator.

Abstract: Conventional piston-cylinder hydraulic actuators require external pressure sources. The hydraulic actuator disclosed utilizes the centrifugal head developed in its chambers. The piston (36) is attached to shaft extension (24) which is splined to the actuator cylinder (20). The cylinder (20) rotates with the shaft (16) to develop a centrifugal fluid head which is selectively directed from the outlet port (40a, 40b) of a contracting chamber through a servo valve (46) to the return passageway (46b, 46a) of an expanding chamber to axially displace piston (36) and shaft (16). An accumulator in the fluid circuit retains fluid displaced from the cylinder (20).

Abstract: Difficulties in precisely and easily adjusting the relative position of two rotors, 72, 104, 206, 226 in a dual permanent magnet generator are avoided in a structure including first and second side by side armatures 92, 108, 218, 230 with the rotors 72, 104, 212, 226 journalled therewithin. A common drive 10, 206 is provided for the rotors 72, 104, 212, 226 and there is further included a control device 80, 250, for angularly shifting at least one of the rotors 72, 104, 212, 226 relative to the common drive 10, 206.

Abstract: In order to provide a multiple port relief valve which is pressure responsive in a highly effective manner so as to control communication between an inlet and a given outlet as a function of the prevailing fluid pressure, where the relief valve functions such that there is no flow at certain pressures, flow to a first outlet as a result of rapid pressure increase, and flow to a second outlet as a result of a gradual pressure increase, the relief valve includes a valve body defining a chamber having a fluid inlet and having a first fluid outlet and a second fluid outlet in fluid communication therewith. The relief valve also includes a first piston-like valve member disposed in the chamber for movement between a first position preventing fluid communication between the fluid inlet and the first fluid outlet and a second position accommodating fluid communication between the fluid inlet and the first fluid outlet.

Abstract: Turbulance hindering degassification in a centrifugal degassifier is minimized through the provision of a generally cylindrical rotary degassifier housing (10). The housing includes an inlet (28) for a liquid containing entrained gas and outlets (40, 42) for degassified liquid. Generally radially extending passageways (44) provide for more rapid removal of gas emerging from the mixture in the interior of the degassifier, thereby reducing turbulance.

Abstract: A hydromechanical transmission including an input shaft, an axial piston hydraulic pump assembly associated with the shaft to be driven thereby, a pivotal swash plate operatively associated with the pump for selectively varying the displacement thereof, an axial piston hydraulic motor assembly coaxial with the pump, and a floating valve plate disposed between and engaging the pump and motor. A sun gear is carried by the motor, while a ring gear is carried by the pump. A rotatable output carrier is coaxial with the shaft and carries at least one planet gear engaged with both the sun and ring gears. The output of the transmission is taken from the carrier.