| 摘要 |
PURPOSE:To make set torque constant without being influenced by affecting the viscosity of working fluid by constituting a dynamometer absorbing the torque of a driving machine with an oil hydraulic motor and regulating the oil pressure corresponding to the set torque. CONSTITUTION:A dynamometer absorbing the torque of a driving machine is formed of an oil hydraulic motor 1 such as bent axis type axial plunger motor, and the oil pressure corresponding to set torque is generated in the motor 1. whereby the torque is absorbed. Two branching circuits are provided to this motor 1, and are connected to a cylinder 7 for pressure setting provided with a check valve 10 and a correcting cylinder 16. Hence, when the viscosity of the working fluid lowers on account of temp. rise the atm. of escape of the working fluid through the valve 10 regulated to constant pressure by a spring 9 to a return pipe 15 increases and the set oil pressure lowers. Then, the pressure applied upon the piston 17 of the cylinder 16 drops, and a correcting lever 12 is moved left by a spring 19, whereby the oil pressure is regulated high in accordance with the lowered component of the viscosity. |
