sealing element 119 of the flange member 29 and the bush 79 for preventing oil leakage from the flange member 29 side and air leakage from the compressor 9 the compressor 9 has an air suctioning inlet 123 opened in the housing 35 thereof and connected to the load 3 fig5 via a duct and the turbine 7 has an air discharging outlet 125 opened in the housing 17 thereof and connected to the load 3 via another duct the cooler 11 is installed in an air piping or ducting between an air discharging outlet 127 opened in the housing 35 of the compressor 9 and an air receiving inlet 129 opened in the housing 17 of the turbine 7 the turbine housing 17 is lined with an insulating material for suppressing temperature rise of cold air drive power from the engine 2 fig5 is in put as drive torque with a revolution speed through the input pulley 4 and the input shaft 45 to the speed increasing mechanism 5 where it is transmitted via the internal ring gear 57 the planetary pinion gears 59 and the sun gear 61 to the impeller shaft 13 as drive torque with an increased revolution speed for driving to rotate the impellers 69 81 of the turbine 7 and the compressor 9 the compressor 9 suctions air from the load 3 and compresses suctioned air to provide hot compressed air i e high temperature high pressure air which runs through the cooler 11 where it is cooled and cooled compressed air runs into the turbine 7 where it is expanded.