Rotary machine

Abstract

A torque receiving member is fixed to a rotary shaft of a compressor. A pulley, which is rotated by an external drive source, is rotatably supported by a housing of the compressor. The pulley is substantially coaxial with the torque receiving member. A rubber damper is located between the pulley and the torque receiving member. The rubber damper absorbs rotational vibration transmitted from the torque receiving member to the pulley. The pulley has a dynamic damper. The dynamic damper includes rollers, which swing like pendulums to reduce rotational vibration of the pulley. Stress produced due to displacement between the axis of the pulley and the torque receiving member is reduced by the rubber damper.

1 . A rotary machine comprising: 
 a housing;    a rotating shaft rotatably supported by the housing;    a first rotor rotatably fixed to the rotating shaft and integrally rotatable therewith outside the housing;    a second rotor rotatably supported on the housing outside the housing and operably connected to the first rotor in a state substantially coaxial to the first rotor; and    an absorption mechanism, arranged on a connecting portion of the first rotor and the second rotor, for absorbing misalignment between the axis of the first rotor and the axis of the second rotor, the absorption mechanism being formed from a rigid member.    
     
     
         2 . The rotary machine as claimed in  claim 1 , wherein the absorption mechanism includes: 
 a support member rotatably supported on one of the first rotor and the second rotor, the support member being rotatably supported on that rotor about an axis parallel to a rotation axis of the rotor supporting the support member; and    an eccentric pin, arranged relatively rotatable to at least one of the other one of the first rotor and the second rotor and the support member, for connecting the other one of the two rotors and the support member, the eccentric pin being arranged eccentric to an axis of the support member by an eccentricity amount that is greater than an amount of axis misalignment between the two rotors so that the axis of the other one of the two rotors does not overlap the axis of eccentric pin.    
     
     
         3 . The rotary machine as claimed in  claim 1 , wherein the absorption mechanism includes: 
 a connecting pin projecting from one of the two rotors and having an axis parallel to a rotation axis of that rotor; and    an elongated hole-like or groove-like connecting portion formed on the other one of the two rotors so as to generally extend in a radial direction of that rotor and face the connecting pin, wherein    the connecting pin is inserted into the connecting portion so as to be slidable along the connecting portion and rotatable within the connecting portion.    
     
     
         4 . The rotary machine as claimed in  claim 1 , further comprising a compression mechanism for compressing refrigerant based on rotation of the rotating shaft.  
     
     
         5 . The rotary machine as claimed in  claim 4 , wherein the compression mechanism is a piston-type compression mechanism.  
     
     
         6 . The rotary machine as claimed in  claim 4 , wherein the compression mechanism is formed so that the amount of refrigerant discharges per one rotation of the rotating shaft is variable.  
     
     
         7 . The rotary machine as claimed in  claim 5 , wherein the compression mechanism is formed so that the amount of refrigerant discharges per one rotation of the rotating shaft is variable.  
     
     
         8 . The rotary machine as claimed in  claim 2 , further comprising a compression mechanism for compressing refrigerant based on rotation of the rotating shaft.  
     
     
         9 . The rotary machine as claimed in  claim 3 , further comprising a compression mechanism for compressing refrigerant based on rotation of the rotating shaft.