Gear pump

About: Gear pump is a research topic. Over the lifetime, 7490 publications have been published within this topic receiving 38837 citations. The topic is also known as: Gear pump.

Infinitely variable hydrostatic mechanical power shift gear with group shiftings

Abstract: The gear consists of a four-shaft epicyclic gear, of which one shaft forms the input shaft which is in connection via an infinitely variable hydrostatic gear with the second shaft and of which the two remaining shafts represent connecting shafts which, in an extreme position of the hydrostatic gear, have the same speeds and behave during adjustment of the hydrostatic gear into the other extreme position in such a way that one becomes constantly slower and the other constantly faster, and which alternately act on the output shaft via gears of a gear group with following group shiftings. What is special is that the group shiftings make possible a multiple utilization of the gears of the gear group and that preparatory shifts for changing the group shifting provide the synchronization of idling gear parts, and that each gear change itself takes place at synchronous speeds, free from load and without tractive force interruption. Such gears require only small hydrostatic gears, have a particularly large transmission control range and favorable efficiencies. Its use in motor vehicles results in fuel savings and a superior acceleration behavior.

Electric actuator for swashplate

Abstract: An actuating mechanism for controlling the swashplate angle in a Stirling cycle engine or other engine having parallel reciprocating pistons. The actuation system uses an electric motor for changing swashplate angle. Various embodiments for gear trains for communicating rotation of the electric motor rotor to the swashplate are described. In a first embodiment, a planet gear carrier is driven by the motor and the planet gears simultaneously mesh with two ring gears having a differing number of teeth. Rotation of the carrier creates a high reduction drive for the second ring gear. In accordance with a second embodiment, the ring gear carrier is permitted to freely rotate and a driving sun gear is provided which meshes with the planet gears. In accordance with a third embodiment, the planet gear carrier is driven and the planet gears have two different diameter scrtions which mesh with the two ring gears, thus avoiding the high friction associated with a mismatching of the teeth of the planet gear and ring gears of the first and second embodiments. The fourth embodiment combines the features of the second and third embodiment configurations.

Motor-mounted internal gear pump and electronic device

Abstract: The present invention aims to provide a motor-mounted internal gear pump that is small-sized, less expensive and has high reliability, while utilizing a function of an internal gear pump that is suitable for high head. A motor-mounted internal gear pump has a pump section for sucking and discharging a liquid and a motor section for driving the same. The pump section has an internal rotor having teeth formed around its outer periphery, an external rotor having teeth formed around its inner periphery and a pump casing that accommodates both rotors and has a suction port for sucking a liquid and a discharge port for discharging a liquid. The motor section has a can that composes a part of the pump casing and formed of anon-magnetic material into a thin plate, a rotator arranged at the inside of the can for driving the external rotor or the internal rotor; and a stator arranged at the outside of the can for rotating the rotator.

Electric motor with epicyclic gear system

Abstract: An electric motor (1) or drive motor has a cylindrical, possibly, however, even conical or disk-shaped rotor (2) and a cavity or interior space (4) surrounded by the rotor (2) and/or its stator (3), into which protrudes in the installed position an epicyclic gear system (5) or planetary gear system which is driven by the electric motor (1). The electric motor (1) has a toothed power output element, for example, a cantilevered gear shaft (6), with which meshes an opposing-teeth-exhibiting power input element, for example, the planetary gears (7) of the epicyclic gear system (5). The power input element of the epicyclic gear drive (5) having the opposing teeth is preassembled with additional drive parts, for example, the carrier (8) for the planetary gears (7) and the planetary ring gear (17) as well as an output shaft (10) and a housing (13) into a unit (9) or subassembly which, during final assembly, can be combined together with the electric motor (1) and its toothed power output element so that the electric motor (1) and the epicyclic gear system (5) can each be separately preassembled.

Pre-engagement turning gear

Abstract: A turning gear for a turbomachine rotor wherein a clash pinion is pre-engaged with a rotor bull gear prior to rolling the turbine rotor. The turning gear includes a small, continuous stall motor mounted in tandem with a larger main turning gear motor, both motors having a common output shaft connected to the gear train of the turning gear. The small motor climbs the clash pinion into engagement with the rotor bull gear in order to eliminate gear train backlash prior to rolling the turbine rotor with the larger motor.