Pump having magnetic coupling mechanism

Abstract

A pump having a magnetic coupling mechanism for driving a drive member of the pump includes a reduction mechanism provided between the drive member of the pump and the magnetic coupling mechanism driven by an external driving source, and in an enclosed housing there are arranged the driving member of the pump, the reduction mechanism and an inner magnet, which constitutes the magnetic coupling mechanism. Due to the reduction mechanism, the pump using a magnetic coupling having a relatively small torque transfer capacity is able to generate a required large torque.

1 . A pump having a magnetic coupling mechanism for driving a drive member of the pump by means of magnetic coupling action of an inner magnet and an outer magnet both constituting the magnetic coupling mechanism,
 wherein a reduction mechanism is intervened between the drive member of the pump and the magnetic coupling mechanism driven by an external driving source, and   the drive member of the pump, the reduction mechanism and at least the inner magnet constituting the magnetic coupling mechanism are arranged inside an enclosed housing.   
     
     
         2 . The pump having the magnetic coupling mechanism according to  claim 1 ,
 wherein the magnetic coupling mechanism comprising:   a magnet portion having a bottomed cylindrical shape and constituting the enclosed housing,   a rotor, on an outer peripheral portion of which the inner magnet is provided and in the central portion of which one end of a drive shaft for driving the reduction mechanism is connected, the rotor being disposed freely rotatably inside the magnet portion, and   a cylindrical rotating member, on an inner peripheral portion of which the outer magnet is provided so as to oppose the inner magnet, the rotating member being disposed with keeping a predetermined gap with respect to the outer periphery of the magnet portion.   
     
     
         3 . The pump having the magnetic coupling mechanism according to  claim 1 , wherein the pump is a gear pump.