Patent ID: 8358024
Filing Date: 2013-01-22
Classification: F03D,F05B,F16H,Y02E,Y02P

Abstract:
1. A wind turbine generator or a tidal current generator comprising: a rotor; a generator for converting rotation energy transmitted from the rotor to electric power; and a hydraulic transmission for transmitting the rotation energy of the rotor to the generator, the hydraulic transmission including a hydraulic pump to be driven by the rotor and a hydraulic motor which is coupled to the generator, wherein the hydraulic pump includes each of the pistons forming a working chamber together with a corresponding one of the cylinders; a cam arranged around the rotation shaft and configured to reciprocate the pistons inside the cylinders, respectively; and a high pressure communication path formed inside the cylinder block and extending in an axial direction of rotation shaft, and wherein the high pressure communication path is communicated with a group of the working chambers that are arranged across the high pressure communication path on both sides of the high pressure communication path to extract pressurized oil from the group of the working chambers outside the hydraulic pump.