Fluid machine

Abstract

A fluid machine for compressing or conveying fluids, in particular for compressing gases to high pressures, has a linear motor ( 2 ), at least one cylinder ( 3 ), a solid or liquid piston ( 4, 4 ′) which can be moved axially in the cylinder ( 3 ), and at least one compression space ( 5 ) which is formed between the cylinder ( 3 ) and the solid or liquid piston ( 4, 4 ′), wherein the linear motor ( 2 ) applies translational driving force to the solid or liquid piston ( 4, 4 ′). For such a fluid machine, the leakage-free and lubricant-free compression and conveying of fluids, in particular a compression of gases to high pressures, and a rather simple construction is made possible owing to the fact that the solid or liquid piston ( 4, 4 ′) is surrounded in the area of the linear motor ( 2 ) by a firmly attached pipe section ( 6 ).

1 - 16 . (canceled) 
     
     
         17 . Fluid machine for compressing or conveying fluids to high pressures, comprising
 at least one cylinder,   a piston which is movable axially in the cylinder,   at least one compression space between the cylinder and the piston,   a linear motor, the linear motor apply a translational driving force to the piston,   wherein the piston is surrounded in a region of the linear motor by a permanently arranged split pipe.   
     
     
         18 . Fluid machine as claimed in  claim 17 , wherein the piston is a solid piston, wherein the linear motor has a stationary coil and at least one movable magnet connected with the piston, and wherein the split pipe is located between the magnet and the coil in a radial direction so that the split pipe surrounds the magnet. 
     
     
         19 . Fluid machine as claimed in  claim 18 , wherein the at least one magnet is located directly on the piston. 
     
     
         20 . Fluid machine as claimed in  claim 17 , wherein the piston is a solid piston, wherein the linear motor has a stationary coil and at least one movable magnet connected with the piston, and wherein the split pipe surrounds both the coil and the magnet. 
     
     
         21 . Fluid machine as claimed in  claim 20 , wherein the at least one magnet is located directly on the piston. 
     
     
         22 . Fluid machine as claimed in  claim 17 , wherein the piston is a multi-stage, solid piston for compressing a gas in several stages. 
     
     
         23 . Fluid machine as claimed in  claim 22 , wherein the solid piston has several sections of different diameters. 
     
     
         24 . Fluid machine as claimed in  claim 17 , wherein the piston is a solid piston, wherein a fluid inlet side of the compression space is connected to the split pipe. 
     
     
         25 . Fluid machine as claimed in  claim 17 , wherein the piston is a solid piston, and wherein a cooling circuit is provided for cooling the linear motor. 
     
     
         26 . Fluid machine as claimed in  claim 17 , wherein the piston is a solid piston and wherein at least one heat exchanger is provided for re-cooling the fluid acted upon by the piston. 
     
     
         27 . Fluid machine as claimed in  claim 25 , wherein at least one heat exchanger is provided for re-cooling the fluid acted upon by the piston and wherein the coolant circuit uses the same fluid to cool the linear motor and to recool the fluid acted upon by the piston. 
     
     
         28 . Fluid machine as claimed in  claim 17 , wherein the piston is a liquid piston for compressing gases to high pressures and wherein the liquid piston is formed of a magnetizable liquid which does not have a vapor pressure that will cause molecules of the liquid to mix with the gas to be compressed. 
     
     
         29 . Fluid machine as claimed in  claim 28 , wherein the liquid is an ionic liquid. 
     
     
         30 . Fluid machine as claimed in  claim 28 , wherein the split pipe is located within the coil in a radial direction so that the split pipe surrounds the liquid. 
     
     
         31 . Fluid machine as claimed in  claim 28 , wherein at least one heat exchanger is provided for re-cooling the liquid. 
     
     
         32 . Fluid machine as claimed in  claim 28 , wherein the liquid also cools the linear motor. 
     
     
         33 . Fluid machine as claimed in  claim 27 , wherein the at least one cylinder comprises two cylinders, and wherein the linear motor and the split pipe are located between the two cylinders. 
     
     
         34 . Fluid machine as claimed in  claim 27 , wherein the split pipe is made of one of a metal, a plastic and a ceramic. 
     
     
         35 . Fluid machine as claimed in  claim 17 , wherein the at least one cylinder comprises two cylinders, and wherein the linear motor and the split pipe are located between the two cylinders. 
     
     
         36 . Fluid machine as claimed in  claim 17 , wherein the split pipe is made of one of a metal, a plastic and a ceramic.