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Connecting element for low-temperature applications, compressor for operation in the low-temperature range

A technology for connecting components and low-temperature applications, which can be used in the direction of connecting components, mechanical equipment, threaded fasteners, etc., and can solve problems such as low tensile strength dimensions, and achieve the effects of size-saving design, small space expansion, and space saving

Inactive Publication Date: 2015-04-22
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Previous solutions to the object of providing a fluid machine, in particular a supercharger or a turbocompressor, which function even at low temperatures down to at least -120° C. have the disadvantage, in particular, that the connecting element has only a relatively low Tensile strength and relatively large dimensions in order to withstand mechanical loads
Therefore, for high-pressure compressors in low-temperature applications, for example, relatively large-diameter joint screws are required, which leads to space-consuming joint flanges of the compressor housing.

Method used

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  • Connecting element for low-temperature applications, compressor for operation in the low-temperature range

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Embodiment Construction

[0026] figure 1 A schematic cross-section is shown in the region of the junction of a turbocompressor not shown in detail for cryogenic applications. The turbocompressor has a housing CC with a horizontal joint SP which involves an upper housing half (the upper housing flange UF is shown in the drawing) and a lower housing half (The lower housing flange LF is shown in the drawing). The two housing halves or flanges UF, LF are held together by means of joining screws SH, one of which is shown in the drawing. The engaging screw SH extends along the longitudinal axis X and has a head H at its upper end with a wrench flat TS for accommodating a tool. The expansion shaft ES of the screw SH extends along the clamping length CL as far as the thread section TH, which terminates at the second end. A nut N is screwed onto the threaded section TH, which clamps together with the screw SH the two flanges LF, UF in the region of the clamping length CL with the washer W inserted in betwee...

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Abstract

The invention relates to a connecting element for low-temperature applications and to a compressor for low-temperature operation. It is proposed according to the invention that the connecting element is composed of a steel which is alloyed with 3 - 4 wt.% of nickel.

Description

technical field [0001] The invention relates to a connection element for cryogenic applications and a compressor for cryogenic operation. Background technique [0002] Especially for compressors for compressing gases in the cold process, connection elements are required which have sufficient toughness at low temperatures down to -120° C. (the lowest temperature for conventional technical applications). The highest possible intensity. Such low operating temperatures result, for example, when compressing ethylene or when liquefying natural gas (liquefied natural gas plants). A further preferred application of the invention can be in the field of separation and storage of carbon dioxide in the context of energy generation after the combustion of fossil energy carriers. [0003] For common connecting elements use so-called low temperature tough ( ) material, which however has a relatively low strength. Examples of this are the material X8Ni9 or austenite etc. according to s...

Claims

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Application Information

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IPC IPC(8): C21D6/00C22C38/08
CPCF16B33/00C22C38/46C22C38/02C21D1/25C22C38/04C22C38/44C21D6/004C21D9/0093Y02P10/122
Inventor 贝亚特·朗根汉
Owner SIEMENS AG
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