Shield tunneling machine oil tank water cooling system and shield tunneling machine oil tank water cooling control method

The invention discloses a shield tunneling machine oil tank water cooling system and a shield tunneling machine oil tank water cooling control method. The system comprises an oil tank, a variable frequency pump, a high-pressure filter, an oil pipe, a cooling unit and a PLC; a fifth temperature sensor is arranged in the oil tank; a first flow sensor is arranged on the oil pipe, and the oil pipe comprises a first oil inlet section and a first oil outlet section; the cooling unit comprises a first heat exchanger, a first water inlet pipe, a first water outlet pipe, a proportional flow valve and asecond flow sensor; the oil tank, the variable frequency pump, the high-pressure filter and the first heat exchanger communicate in sequence through the oil pipe, and the tail end of the oil pipe isconnected into the oil tank; the first water inlet pipe, the first heat exchanger and the first water outlet pipe are sequentially connected; the proportional flow valve and the second flow sensor arearranged on the first wate