Hydraulic transmission, wind turbine power generating apparatus, and operation control method

摘要

A hydraulic transmission includes: a hydraulic pump configured to pressurize working oil; a hydraulic motor configured to be driven by the working oil pressurized by the hydraulic pump; a high pressure line which connects an outlet side of the hydraulic pump and an inlet side of the hydraulic motor; a low pressure line which connects an outlet side of the hydraulic motor and an inlet side of the hydraulic pump; a reservoir tank connected to the low pressure line for storing the working oil; and a boost pump for feeding the working oil stored in the reservoir tank to the low pressure line. The hydraulic transmission is configured such that the working oil is not supplied from the low pressure line to a bearing or a seal of at least one of the hydraulic pump or the hydraulic motor at least during abnormal stop of the boost pump.