Expander

Abstract

An expander includes a cylinder at which an inflow port and an outflow port are formed, a piston eccentrically disposed in the cylinder relative to a rotational shaft to form a fluid chamber between the piston and the cylinder, and a blade dividing the fluid chamber into a high pressure side and a low pressure side. The cylinder, the piston and the blade are arranged and configured such that the expander recovers power of a fluid depressurized in the fluid chamber. The cylinder has an inner diameter Dc, the inflow port has a diameter Di, and the outflow port has a diameter Do. The relationship 0.065×Dc≦Di≦0.13×Dc and/or 0.065×Dc≦Do≦0.13×Dc is satisfied.

1 . An expander comprising:
 a cylinder at which an inflow port and an outflow port are formed;   a piston eccentrically disposed in the cylinder relative to a rotational shaft to form a fluid chamber between the piston and the cylinder; and   a blade dividing the fluid chamber into a high pressure side and a low pressure side,   the cylinder, the piston and the blade being arranged and configured such that the expander recovers power of a fluid depressurized in the fluid chamber,   the cylinder having an inner diameter Dc,   the inflow port having a diameter Di, and
   0.065 ×Dc≦Di≦ 0.13 ×Dc.    
   
     
     
         2 . The expander of  claim 1 , wherein
 a density of a fluid in the inflow port is ρi,   a density of a fluid in the outflow port is ρo,   the outflow port has a diameter Do, and
     Do=Di ×(ρ i/ρo ) 2 .
 
   
     
     
         3 . An expander comprising:
 a cylinder at which an inflow port and an outflow port are formed;   a piston eccentrically disposed in the cylinder relative to a rotational shaft to form a fluid chamber between the piston and the cylinder; and   a blade dividing the fluid chamber into a high pressure side and a low pressure side,   the cylinder, the piston and the blade being arranged and configured such that the expander recovers power of a fluid depressurized in the fluid chamber, wherein   the cylinder having an inner diameter Dc,   the outflow port having a diameter Do, and
   0.065 ×Dc≦Do≦ 0.13 ×Dc.    
   
     
     
         4 . The expander of  claim 3 , wherein
 a density of a fluid in the inflow port is ρi,   a density of a fluid in the outflow port is ρo,   the inflow port has a diameter Di, and
     Di=Do ×(ρ o/ρi ) 2 .