Base oil tank and cluster engine

The utility model provides a base oil tank and cluster engine belongs to the power generating equipment field, the base oil tank includes the oil tank main part, oil tank main part bottom is provided with the opening, the opening welding has the flange, said flange is kept away from the open-ended one side is provided with the closing plate, the flange also is provided with the screw, said closing plate with the flange passes through bolted connection. The embodiment of the utility model provides a base oil tank sets up the opening through the bottom in the oil tank main part, at the opening part welded flange to with closing plate sealing flange mode, when making the base oil tank rinse, by dismantling the closing plate, can stretch into the base oil tank to the burnisher in, rinse the base oil tank, thereby has improved present base oil tank because the structure reason of self, convenient to use person does not carry out abluent problem to the inside of base oil tank.