Cylinder piston unit, especially for steam engines

Details Cylinder piston unit, especially for steam engines Cylinder piston unit, especially for steam engines

2000-03-10

2001-06-19

Nguyen, Hoang (Department: 3748)

Power plants

Fluid within expansible chamber heated or cooled

Concurrent fluid supply and vaporization

C060S515000, C060S669000, C060S670000

Reexamination Certificate

active

06247309

ABSTRACT:

The invention relates to a cylinder-piston unit in particular for steam power engines with expansion by heat influx, as defined in the introductory part of the main claim.
Known is a steam power engine with a cylinder-piston unit according to DE-PS 828 988, with expansion by feed of heat. The piston has a warm head, which is insulated against its inner side. The feed of heat to the cylinder-piston element takes place via cylinder ribs by means of an open burner in the stroke area of the insulated warm head and the cylinder head with the compression chamber. The steam is generated directly in the heated cylinder by metered injection of water. The outlet for the expanded steam is formed by slots that are released by the piston in the zone of the lower dead point.
A pore burner for substantially NOx-free combustion is known from patent document DE 43 22 109 A1. Stabilization and limitation of the temperature in the course of combustion is achieved through arranging particles in layers varying based on fine to coarse pores, in steps from the inlet to the outlet of the fuel gas, which assures low-pollutant combustion. This type of burner has a high power density based on its structural volume, whereby the document describes its application as a generator of hot water or of steam.
The invention is based on the problem of feeding the cylinderpiston unit of the steam power engine directly with heat by means of a pore burner admitting heat directly on the cylinder head and expansion chamber.
Said problem is solved by the features specified in the characterizing part of the independent claim and in the dependent claims. By means of the proposed type of construction, a complex feed of heat to the operating medium is achieved for the entire operating space, on the one hand, as well as low-loss heat transfer to said space, on the other.
Pore burners work with relatively low combustion temperatures and, because of their structure, permit the development of heat bridges directly leading to the cylinder-piston unit. The low combustion temperature level is suited for the transfer of heat into the operating process of a steam engine with expansion by heat influx, on the one hand, and assures low-pollutant combustion, on the other.
The features of the dependent claims are explained in greater detail in the description in connection with their effects.


REFERENCES:
patent: 2867975 (1959-01-01), Mallory
patent: 4077214 (1978-03-01), Burke, Jr. et al.
patent: 4220005 (1980-09-01), Cutts
patent: 4599859 (1986-07-01), Urso
patent: 818 496 (1951-10-01), None
patent: 828 988 (1952-01-01), None
patent: 43 22 109 (1995-01-01), None
patent: 195 46 658 (1997-06-01), None

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