High-speed low-friction oil tank for small hydraulic source

The high-speed low-friction oil tank for the small hydraulic source comprises a piston, a shell, a spring, a cover plate and a liquid level alarm, one end of the shell is connected with a plunger pump, the other end of the shell is connected with the cover plate, the liquid level alarm is installed on the cover plate, the piston is installed in the shell, and a plurality of grooves are formed in the outer wall of the piston in the axial direction. The piston is used for containing impurities in oil and preventing the impurities from entering the contact face between the shell and the piston, and the flexibility of the piston is improved. The spring is mounted between the piston and the cover plate; the oil tank, the motor and the hydraulic plunger pump form a hydraulic energy source, and the oil tank provides oil for the hydraulic energy source. According to the oil tank, the phenomena of heating, abrasion, jamming and the like caused by friction between the piston and the shell in the high-speed working proc