A linear energy harvesting device that includes a housing and a piston that moves at least partially through the housing when it is compressed or extended from a rest position. When the piston moves, hydraulic fluid is pressurized and drives a hydraulic motor. The hydraulic motor drives an electric generator that produces electricity. Both the motor and generator are central to the device housing. Exemplary configurations are disclosed such as monotube, twin-tube, tri-tube and rotary based designs that each incorporates an integrated energy harvesting apparatus. By varying the electrical characteristics on an internal generator, the kinematic characteristics of the energy harvesting apparatus can be dynamically altered. In another mode, the apparatus can be used as an actuator to create linear movement. Applications include vehicle suspension systems (to act as the primary damper component), railcar bogie dampers, or industrial applications such as machinery dampers and wave energy harvesters, and electro-hydraulic actuators.

A linear energy harvesting device that includes a housing and a piston that moves at least partially through the housing when it is compressed or extended from a rest position. When the piston moves, hydraulic fluid is pressurized and drives a hydraulic motor. The hydraulic motor drives an electric generator that produces electricity. Both the motor and generator are central to the device housing. Exemplary configurations are disclosed such as monotube, twin-tube, tri-tube and rotary based designs that each incorporates an integrated energy harvesting apparatus. By varying the electrical characteristics on an internal generator, the kinematic characteristics of the energy harvesting apparatus can be dynamically altered. In another mode, the apparatus can be used as an actuator to create linear movement. Applications include vehicle suspension systems (to act as the primary damper component), railcar bogie dampers, or industrial applications such as machinery dampers and wave energy harvesters, and electro-hydraulic actuators.

A liquid ring turbine has a casing defining an interior chamber with a symmetry axis. A shaft, having an axis substantially parallel to the symmetry axis, is eccentrically positioned to the symmetry axis. An impeller is coupled to the shaft and is configured to rotate in a first direction. The impeller includes a plurality of vanes extending away from the shaft in a second direction at least partially opposite the first direction. The impeller rotates within a liquid ring enclosed in the casing such that a plurality of expansion chambers are defined. Each expansion chamber is defined between adjacent vanes and the liquid ring. A gas inlet port is in fluid communication with a first expansion chamber defining a first volume. A gas outlet port is in fluid communication with a second expansion chamber. The second expansion chamber defines a second volume that is greater than the first volume.

A liquid ring turbine has a casing defining an interior chamber with a symmetry axis. A shaft, having an axis substantially parallel to the symmetry axis, is eccentrically positioned to the symmetry axis. An impeller is coupled to the shaft and is configured to rotate in a first direction. The impeller includes a plurality of vanes extending away from the shaft in a second direction at least partially opposite the first direction. The impeller rotates within a liquid ring enclosed in the casing such that a plurality of expansion chambers are defined. Each expansion chamber is defined between adjacent vanes and the liquid ring. A gas inlet port is in fluid communication with a first expansion chamber defining a first volume. A gas outlet port is in fluid communication with a second expansion chamber. The second expansion chamber defines a second volume that is greater than the first volume.

A malfunction diagnosis apparatus for a gear motor includes a vibration sensor portion, and a diagnosis unit that determines whether or not an abnormality occurs in the gear motor based on vibration detected by the vibration sensor portion. The vibration sensor portion and the diagnosis unit are installed in the gear motor. The diagnosis unit has a control power source which supplies power to the vibration sensor portion. The vibration sensor portion outputs detected vibration data to the diagnosis unit in a digital format.

A malfunction diagnosis apparatus for a gear motor includes a vibration sensor portion, and a diagnosis unit that determines whether or not an abnormality occurs in the gear motor based on vibration detected by the vibration sensor portion. The vibration sensor portion and the diagnosis unit are installed in the gear motor. The diagnosis unit has a control power source which supplies power to the vibration sensor portion. The vibration sensor portion outputs detected vibration data to the diagnosis unit in a digital format.

A rotary engine that includes at least two sets of baffles that are arranged between a cylinder body and a rotor, and are in seal fit with the inner wall of the cylinder body to form at least two sealed cavities in the cylinder body; at least one set of the baffle is a movable baffle, and can rotate around the center of the cylinder body; a one-way rotation mechanism is arranged between the movable baffle and the rotor, and drives the rotor to rotate in one direction. The rotary engine has the benefits that the sealed cavities are formed by the movable baffle and the cylinder body; four working strokes including air suction, compression, ignition and exhaust are carried out in each sealed cavity; the movable baffle rotates under acting and counter-acting forces, drives the one-way rotation mechanism to rotate, and then drives the rotor to rotate.

A gear pump for power generation comprises a first rotor and a second rotor in a case. The first rotor comprises a first plurality of radially spaced teeth, wherein the first plurality of radially spaced teeth wrap around the first rotor helically in a clockwise direction, and wherein at a first position the first plurality of radially spaced teeth have a helix angle different than the helix angle of the first plurality of radially spaced teeth at a second position. The second rotor comprises a second plurality of radially spaced teeth, wherein the second plurality of radially spaced teeth wrap around the second rotor helically in a counter-clockwise direction, and wherein at a first position the second plurality of radially spaced teeth have a helix angle different than the helix angle of the second plurality of radially spaced teeth at a second position.

A gear pump for power generation comprises a first rotor and a second rotor in a case. The first rotor comprises a first plurality of radially spaced teeth, wherein the first plurality of radially spaced teeth wrap around the first rotor helically in a clockwise direction, and wherein at a first position the first plurality of radially spaced teeth have a helix angle different than the helix angle of the first plurality of radially spaced teeth at a second position. The second rotor comprises a second plurality of radially spaced teeth, wherein the second plurality of radially spaced teeth wrap around the second rotor helically in a counter-clockwise direction, and wherein at a first position the second plurality of radially spaced teeth have a helix angle different than the helix angle of the second plurality of radially spaced teeth at a second position.

An electricity generating device comprising a housing; a first lobed rotor and a second lobed rotor rotatably arranged in a fluid passage enclosed by the housing such that the lobes of the first and the second lobed rotor intermesh to create a barrier between a high-pressure and a low-pressure side of the housing during operation of the device; a first electricity generator to which the first lobed rotor is coupled, the first electricity generator being capable of varying the load of the first lobed rotor; and a second electricity generator to which the second lobed rotor is coupled, the second electricity generator being capable of varying the load of the second lobed rotor. There is also provided a method of synchronizing rotational positions of a first lobed rotor coupled to a first electricity generator and a second lobed rotor connected to a second electricity generator in a turbine.