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).

Description

BACKGROUND OF THE INVENTION[0001]1. Field of Invention[0002]The invention relates to a fluid machine for compressing or conveying fluids, especially for compressing gases to high pressures, with a linear motor, at least one cylinder, a solid piston which can be moved axially in the cylinder, or an axially movable liquid piston and at least one compression space which is made between the cylinder and the solid piston and the liquid piston, the linear motor transferring a translational driving force to the solid piston or the liquid piston.[0003]2. Description of Related Art[0004]Fluid machines are known in the prior art in different embodiments and versions. Fluid machines can be subdivided, first of all, according to whether they are intended for conveying or compressing liquids or gases. Fluid machines which are used for conveyance of liquids are generally also called pumps, while fluid machines for compressing gases are called compressors. Moreover fluid machines can also be disti...

AI Technical Summary

Benefits of technology

[0010]The object of this invention is to provide the initially described fluid machine for compression or conveyance of fluids with a structure that is as simple as possible and enables leak-free and as much as possible also lubricant-free compression or conveyance of fluids, especially compression of gases to high pressures.

[0011]This object is achieved in the initially described fluid machine, first of all, in that the solid piston or liquid piston in the region of the linear motor is surrounded by a permanently arranged split pipe. Prevention of leakage to the atmosphere can be easily achieved by the arrangement of a split pipe. The leaks which occur on moving seals as dictated by principle when the solid piston is sealed to the drive, and thus, to the atmosphere are prevented by the split pipe. Sealing to the atmosphere can be achieved by the arrangement of the split pipe solely with static seals.

Problems solved by technology

In this way, electrical losses as a result of eddy currents occur in the split pipe and the split pipe is heated so that the efficiency of the linear motor with the split-pipe located in between is less than the efficiency of a linear motor with a split pipe which lies outside.

This disadvantage of greater losses does not occur in the second embodiment in which the split-pipe surrounds the rotor and the stator.

In this case, the coil for an outside split pipe would likewise be exposed to a corrosive medium; this can lead to an adverse effect on the service life of the coil.

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