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Maintenance of multi-stage centrifugal screw compressors of the M225A7, M226A6, M226A84, and M226B1 types at the York Petrochemical Plant; suitable for use in the chemical industry (salt chemicals, coal chemicals, petrochemicals), oil and gas sectors, polysilicon production, food and beverage freezing, pharmaceutical manufacturing, and mine cooling applications. A centrifuge device, comprising a centrifuge rotor cover and a centrifuge rotor; the centrifuge rotor cover is equipped with a clip, while the centrifuge rotor has a hook, and the combination of the clip and the hook enables a first operating state of opening and a second operating state of locking ； When the buckle and hook are in the first operating state, the centrifuge rotor cover can be detached from the centrifuge rotor; when they are in the second operating state, the centrifuge rotor cover remains connected to the centrifuge rotor. A centrifuge rotor cover that is easy to remove is provided for the centrifuge rotor, allowing the centrifuge tubes to be securely positioned within it and preventing them from being flung out due to centrifugal force. A centrifuge is a machine that uses centrifugal force to separate the various components in mixtures of liquids and solid particles, or of liquids together. Centrifuges are primarily used to separate solid particles from liquids in suspensions, or to separate two liquids of different densities that are immiscible with each other in emulsions; for example, to separate cream from milk ； It can also be used to remove liquid from wet solids, such as spinning wet clothes in a washing machine ； Special super-speed tubular separators can also separate gas mixtures with different densities ； By taking advantage of the fact that solid particles with different densities or particle sizes have different settling speeds in a liquid, some sedimentation centrifuges can also sort solid particles according to their density or particle size. At present, when the centrifuge rotor is operating at high speeds, due to the excessive rotational velocity, the centrifuge tubes inside the rotor often get flung out during startup and sudden deceleration. Maintenance of multi-stage centrifugal screw compressors in the York Petrochemical Plant: M225A7, M226A6, M226A84, M226B1