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Multi-stage piston compressor

a piston compressor and multi-stage technology, applied in the direction of piston pumps, positive displacement liquid engines, machines/engines, etc., can solve the problem of problems such as the application of piston compressors

Inactive Publication Date: 2009-12-17
BORSIG COMPRESSOR PARTS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The invention is a multi-stage piston compressor that allows for easy adjustment of pressure and volume flow with a single machine. The compressor has multiple piston-cylinder units, each with its own linear drive for controlling the movement of the piston. This means that each piston can be controlled independently, allowing for individual adjustment of the speed and stroke of each piston. The control device can also change the stage pressure ratio of the pistons, which can lead to a reduction in dead space and improved efficiency. The compressor is designed in a flexible manner, with different inner cross sections for the cylinders in the different stages, and the linear drives can be controlled to adjust the volume ratio between the stages. The compressor can also be controlled with a closed loop to regulate its movement precisely."

Problems solved by technology

For this reason, it is problematic to apply such piston compressors where different compressions or pressures and different volume flows are to be realized with one and the same machine.

Method used

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Embodiment Construction

[0020]The piston compressor shown in FIG. 1 is designed in a three-stage manner and accordingly comprises three piston-cylinder units 2, 4 and 6. The piston-cylinder units 2, 4, 6, as is shown in FIG. 4, consist in each case of a cylinder 8 which is cylindrical in cross section and of a piston 10 which is linearly movable therein. The piston 10 is connected to a piston rod 12. The cylinder 8 in a known manner comprises inlet valves and outlet valves, which may be designed as spring-biased check valves, which are suitably connected to the entry conduits and exit conduits.

[0021]According to the invention, each piston-cylinder unit 2, 4, 6 has its own linear drive 14, 16, 18. The piston-cylinder unit 2 comprises a linear drive 14 which is connected to the piston rod 12 of the piston cylinder unit 2, in order to move its piston 10 linearly in the inside of the cylinder 8. Correspondingly, the piston-cylinder unit 4 is connected to its own linear drive 16, which moves the piston 10 of th...

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Abstract

A multi-stage piston compressor is provided with at least two piston-cylinder units, which respectively comprise a separate linear drive for moving the piston. A control device is also provided, which is designed in a manner such that the linear drives may be controlled individually with regard to speed and stroke.

Description

BACKGROUND OF THE INVENTION[0001]The invention relates to a multi-stage piston compressor having at least two piston-cylinder units.[0002]Multi-stage piston compressors are known, in order to increase the pressure of a gas in several stages. With such multi-stage compressors, the exit pressure is increased in a first stage to a first intermediate pressure by a first piston-cylinder unit. This first intermediate pressure is then increased to a yet higher pressure in the second stage by a second piston-cylinder unit. This continues in accordance with the number of applied stages. With the known piston compressors, the pistons of all piston-cylinder units are driven via a common crank drive, which fixedly sets the stroke of the piston. Moreover, the diameter of the individual cylinders is selected differently, depending on the pressure ratio between the individual stages, i.e. the inner diameter of the cylinders reduces from stage to stage, since the volume of the gas decreases with ea...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04B25/00
CPCF04B9/02F04B35/01F04B25/02F04B25/00
Inventor SCHULZ, HARALDTITTEL, ROLAND
Owner BORSIG COMPRESSOR PARTS GMBH
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