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Materia for nozzle head and nozzle head made from same

A technology of nozzle head and nozzle mouth, applied in charging system, fuel injection device, carburetor, etc., to achieve good corrosion resistance

Inactive Publication Date: 2008-11-26
WAERTSILAE SCHWEIZ AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current use of cobalt-based alloy stellite 6 in large diesel engines can provide sufficient service life in terms of erosion, wear and (especially in nozzle holes) cavitation, but in terms of resistance to hot corrosion and prevention of it. Caused or increased There is still room for improvement in terms of material loss

Method used

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  • Materia for nozzle head and nozzle head made from same

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Embodiment Construction

[0025] figure 1 A fuel nozzle section for a large diesel engine - especially a two-stroke direct-flow scavenged large diesel engine. The entire nozzle is indicated by the number 1. The fuel nozzle 1 includes a nozzle tip 2 of the embodiment of the present invention fixed on a nozzle body 3 . The nozzle head 2 is preferably detachably connected to the nozzle body 3 as shown, so that the nozzle head can be replaced individually without having to replace the entire fuel nozzle 1 .

[0026] The nozzle head 2 has a longitudinal hole 20 and a plurality of, for example five, nozzle openings 21 . figure 1 Only two of them are shown. Each nozzle opening 21 starts at the longitudinal bore 20 and extends radially therefrom in a slightly downwardly inclined manner.

[0027] During operation, fuel oil, usually heavy oil or other diesel oil, is injected into the combustion chamber (not shown in detail) under high pressure through the longitudinal holes 20 and the nozzle openings 21 inte...

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PUM

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Abstract

Material for the nozzle head (2) of a fuel injection nozzle (1) of an internal combustion engine, especially a large diesel engine, comprises a chromium-based alloy containing (in wt.%) 0-50 nickel, 0-5 carbon, 0-5 silicon and at least 50 chromium. Further, the invention also included for a nozzle head (2) manufactured by this material.

Description

technical field [0001] The invention relates to a material for the nozzle head of a fuel nozzle, a nozzle head made of this material and a fuel nozzle for an internal combustion engine, especially a large diesel engine. Background technique [0002] In large diesel engines, such as the drives of ships or those generating power in stationary plants, fuel oil, typically heavy oil or other diesel fuel, is fed into the combustion chamber by means of fuel nozzles. Such nozzles often include a nozzle tip that projects partially into the combustion chamber. This nozzle head is also called atomizer. Since the nozzle tip is subject to high thermal, mechanical and chemical loads, it is a wearing part. Depending on the degree of stress, damage can occur on the nozzle tip, eg loss of material due to corrosion, erosion and / or wear, or even result in cracks that open. [0003] Mechanical strain also arises from high injection pressures which may exceed 1000 bar. Loss of material may o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/06F02M19/03F02M61/18B22F3/15F02B3/06F02B75/02F02M61/00F02M61/16
CPCB22F3/15B22F2998/10C22C1/045C22C27/06F02B3/06F02B2075/025F02F2007/0097F02M61/166F02M61/18F02M61/182B22F9/08
Inventor D·施拉格尔
Owner WAERTSILAE SCHWEIZ AG