Oil supply system of feed pump

The utility model discloses an oil supply system of feed pump, the oil in the oil tank is transported to the work oil cooler and lubricating oil condenser through the work oil loop and the lubricating oil loop, the oil in the work oil cooler is transported to the connection end between the work oil loop and the oil tank through the oil pipe for flowing into the oil tank through the reflux valve for guaranteeing stable oil pressure in the work oil loop, the oil in the lubricating oil condenser is transported to the motor and a water feeding pump and transported to the oil tank through the motor bearing oil path, the liquid fluid coupling bearing oil path and water feeding pump bearing oil path, an oil supplying loop for offering stable pressure oil for work oil loop and the lubricating oil loop is formed in the oil tank. The oil supplying loop comprises three branches, three branches are adjusted for satisfying the oil pressure requirement, the bottom of the oil tank of the inlet filter net is connected to an assistant oil pump, the outlet of the assistant oil pump is provided with an air discharging pipeline, a non-return door and a manually operated door as the urgency spare pump for offering lubricating oil pressure.