Fluid machine connected to a drive source via a magnetic coupling

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.

Description

technical field [0001] The present invention relates to a fluid machine connected to a driving source via magnetic coupling, in particular to a machine with a gas / liquid leak-proof structure {closed type structure} except for an inlet / discharge port, They include pumps and compressors, which are equipped with non-contact bearings without oil supply and are driven by a drive source through magnetic coupling, which is a power transmission mechanism that does not need to be mechanically connected to the drive source, so it can handle toxic gases and / or Or gases and liquids associated with the nuclear industry. Background technique [0002] In order to prevent wear of mechanical parts and environmental pollution due to radiation in the operation of nuclear equipment, machinery such as compressors and vacuum pumps used in vacuum containers of nuclear equipment are required to have high service life and reliability, especially high anti-corrosion Radiation and / or anti-wear proper...

AI Technical Summary

Problems solved by technology

In the worst case, both parts 20 and 52 may touch each other and damage the magnetic coupling 50

On the other hand, the space between the seal assembly 20 and the driving magnet 52 may expand, so that the magnetic flux density reaching the driven magnet is weakened, so that the normal torque transmission is disrupted.

[0021] From the point of view of the rotating wings 53 mounted on the outer surface of the outer rotor 51, these tend to be of large size, which requires a large space for the rotation of the wings; this requires the design of a larger magnetic coupling 50 , the entire fluid machinery will be larger

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