Importance

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Abstract

The present invention aims to propose a fluid machine in which a magnetic coupling includes an outer rotor 32 to the cylinder-bottom part of which a drive shaft of the drive component is connected, outer rotor side magnets 33 placed on an inner periphery of the outer rotor, an inner rotor 23 fitted to a drive shaft of the fluid machine, inside the outer rotor, inner rotor side magnets 21 placed on an outer periphery of the inner rotor, whereby attraction workings and repulsion workings between the outer rotor side magnets and the inner rotor side magnets transmit torques of the drive component to the fluid machine, and a sealing assembly 20 a partition part of which is placed between the inner rotor 23 and the outer rotor 32 and surrounds a drive shaft of the fluid machine so as to secure gas-tightness, the shaft including the inner rotor 23 and the inner rotor side magnets 21; further an air ventilation device for ventilating a space inside the outer rotor by means of inducing and/or discharging ambient air is provided into the outer rotor 32 of the magnetic coupling so as to cool the sealing assembly 20 and the outer rotor side magnets 33.

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First Claim