Lubricating oil device of screw expander unit

The lubricating oil device comprises a sliding sleeve, a sealing plate, a plug rod and an oil storage barrel, an oil outlet pipe is arranged on the lower surface of the oil storage barrel, an oil inlet pipe is arranged on one side of the bottom end of the oil storage barrel, a valve is arranged on the oil inlet pipe, a piston is installed on the inner wall of the oil storage barrel in a sliding mode, and the plug rod is arranged on the upper surface of the piston. And the sealing plate is welded to the upper surface of the oil storage barrel, a fixing seat is fixed to the middle of the upper surface of the sealing plate through a bolt, a rotating block is rotationally installed on the fixing seat, and the upper end of the plug rod penetrates through the sealing plate and is in threaded engagement with the rotating block. The device is compact in structure and convenient to use, lubricating oil is conveniently pressurized and filled, the filling efficiency is improved, and the use requirements of personnel are