The invention discloses a self-pumping shaftless double-
flywheel energy storage device using a compound molecular pump. The upper and lower spherical
flywheel rotors are symmetrically distributed at both ends of the motor
stator, and a groove is opened on the side close to the motor
stator, and a motor is embedded in the groove. Rotor, the
flywheel rotor is provided with a five-degree-of-freedom
magnetic bearing radially outside, which includes an axial
stator, a radial stator, a torsion stator, and a permanent
magnet. Gyroscopic effect; there is a composite molecular pump under the flywheel, the upper part is a turbo molecular pump, the lower part is a traction molecular pump, and the middle is a transition structure. The pumping speed of the low-pressure side, the
radius of the moving blade and the static blade decreases from top to bottom; the spiral groove of the traction molecular pump is opened on the stator, and the rotor is smooth; the
radius of the moving blade on the upper part of the pump body is relatively large, and the
centrifugal force is small, which improves the
vacuum pump performance.
operational reliability.