行业组件数据 · 2026

孔板/喷孔

Precision orifice plate or tip component in fuel nozzles that meters and atomizes fuel for combustion.

技术定义与适配语境
典型 孔板/喷孔 会按材料、尺寸公差、适配关系和失效风险在 汽车制造 中评估。

An orifice plate or tip is a critical precision component in fuel injection systems, typically integrated into fuel nozzles. It features precisely engineered orifices (holes) that control the flow rate, pressure drop, and spray pattern of fuel entering combustion chambers. In industrial applications like gas turbines, boilers, and engines, it ensures optimal fuel-air mixing for efficient combustion, reduced emissions, and stable operation. The component's geometry—including orifice diameter, length-to-diameter ratio, and inlet/outlet profiles—is meticulously designed to achieve specific flow characteristics and atomization performance.

组件规格

定义
An orifice plate or tip is a critical precision component in fuel injection systems, typically integrated into fuel nozzles. It features precisely engineered orifices (holes) that control the flow rate, pressure drop, and spray pattern of fuel entering combustion chambers. In industrial applications like gas turbines, boilers, and engines, it ensures optimal fuel-air mixing for efficient combustion, reduced emissions, and stable operation. The component's geometry—including orifice diameter, length-to-diameter ratio, and inlet/outlet profiles—is meticulously designed to achieve specific flow characteristics and atomization performance.
工作原理
The orifice plate/tip operates on the principle of fluid dynamics and pressure differential. Fuel under high pressure enters the orifice, where the constricted cross-sectional area causes a pressure drop and accelerates the fluid. This acceleration, combined with the orifice's edge geometry, shears the fuel into fine droplets (atomization) as it exits. The flow rate is governed by the Bernoulli equation and orifice discharge coefficient, depending on factors like pressure, viscosity, and orifice dimensions. In multi-orifice designs, it also directs spray patterns to optimize fuel distribution in the combustion zone.
材料
High-temperature alloys (e.g.Inconel 718Hastelloy X)stainless steels (e.g.316L17-4PH)or ceramic compositesselected for corrosion resistancethermal stabilityand mechanical strength at operating temperatures up to 1000°C.
Tolerance
±0.005 mm on diameter
Surface Finish
Ra ≤ 0.4 μm
Pressure Rating
Up to 500 bar
Orifice Diameter
0.1 mm to 2.0 mm
Temperature Range
-50°C to 1000°C
Flow Coefficient (Cd)
0.6 to 0.9
标准
ISO 5167DIN 1952ASME MFC-3M

行业分类与别名

孔板/喷孔 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Abrasive particles in fuel->Orifice erosion leading to increased flow rate and poor atomization->Install upstream filters; use hardened materials; implement regular inspection schedules
Thermal stress from rapid temperature cycles->Cracking or distortion altering spray patterns->Design with thermal expansion compensation; apply protective coatings; control combustion stability
Manufacturing variance in orifice geometry->Inconsistent fuel distribution causing hotspots or incomplete combustion->Adhere to tight tolerances; use precision machining like EDM; conduct flow testing on each unit

工业生态与工程逻辑

0
Erosion or clogging from fuel contaminants
1
Thermal cracking due to cyclic heating
2
Flow deviation from manufacturing tolerances
3
Corrosion in aggressive fuel environments

合规与检测

tolerance
ISO 2768-mK for general dimensions; flow tolerance ±2% of specified rate at rated pressure
test method
Flow bench testing per ISO 5167; spray pattern analysis via laser diffraction; pressure decay leak testing

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采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What is the primary function of an orifice plate in a fuel nozzle?

It precisely meters fuel flow and atomizes it into fine droplets for efficient combustion, ensuring optimal fuel-air mixing and emission control.

How does orifice diameter affect fuel injection performance?

Smaller diameters increase pressure drop and atomization fineness but reduce flow rate; sizing is critical for matching engine load and emission requirements.

What materials are used for high-temperature applications?

Nickel-based superalloys like Inconel or ceramics, chosen for resistance to thermal fatigue, oxidation, and fuel corrosion.

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CNFX Industrial Component Index · 汽车制造

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URN:CNFX:ME:UNIT:ORIFICE_PLATE_TIP