行业组件数据 · 2026

扩散器

A diffuser is a critical component in centrifugal compressors that converts kinetic energy into pressure energy by slowing down high-velocity gas flow.

技术定义与适配语境
典型 扩散器 会按材料、尺寸公差、适配关系和失效风险在 化学制造 中评估。

In high-pressure ammonia synthesis loop centrifugal compressors, the diffuser is a stationary component located downstream of the impeller. It consists of a series of vanes or a volute that gradually expands the flow area, reducing gas velocity while increasing static pressure through controlled deceleration and diffusion. This component is essential for achieving the required discharge pressure for ammonia synthesis processes.

组件规格

定义
In high-pressure ammonia synthesis loop centrifugal compressors, the diffuser is a stationary component located downstream of the impeller. It consists of a series of vanes or a volute that gradually expands the flow area, reducing gas velocity while increasing static pressure through controlled deceleration and diffusion. This component is essential for achieving the required discharge pressure for ammonia synthesis processes.
工作原理
The diffuser operates on the Bernoulli principle and conservation of mass. High-velocity gas exiting the impeller enters the diffuser's expanding passage. As cross-sectional area increases, velocity decreases, converting kinetic energy into pressure energy. Vaned diffusers use aerodynamic profiles to guide flow smoothly, minimizing turbulence and losses, while vaneless diffusers rely on geometric expansion. This pressure recovery is critical for efficient compressor performance in industrial applications.
材料
Typically constructed from high-strength stainless steel (e.g.AISI 31617-4PH) or nickel-based alloys (e.g.Inconel 718) to withstand high pressures (up to 300 bar)temperatures (up to 200°C)and corrosive ammonia/hydrogen-nitrogen mixtures. Surfaces may be coated with anti-corrosion treatments like nitriding or ceramic coatings.
Vane Type
Aerofoil or wedge design
Efficiency
85-92%
Flow Range
50-500 m³/s
Pressure Ratio
1.5-3.0
Temperature Range
-50°C to 200°C
Operating Pressure
Up to 300 bar
标准
ISO 5389DIN 1940API 617

行业分类与别名

扩散器 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

Material fatigue due to high-pressure cycling->Crack propagation leading to catastrophic rupture->Regular non-destructive testing (e.g., ultrasonic inspection), use of fatigue-resistant alloys, and pressure cycle monitoring
Corrosive attack from ammonia synthesis gas->Wall thinning and loss of structural integrity->Corrosion-resistant materials (e.g., Inconel), protective coatings, and routine thickness measurements

工业生态与工程逻辑

0
Fatigue failure from pressure cycling
1
Corrosion from ammonia/hydrogen exposure
2
Erosion from particulate contamination
3
Vibration-induced cracking

合规与检测

tolerance
Dimensional tolerances per ISO 2768-m, pressure vessel standards per ASME BPVC Section VIII
test method
Hydrostatic pressure testing at 1.5x design pressure, non-destructive examination (NDE) including dye penetrant and radiographic testing, performance validation per ISO 5389

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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 a diffuser in a centrifugal compressor?

To convert kinetic energy from high-velocity gas into pressure energy by slowing the flow through an expanding passage, increasing static pressure for industrial processes like ammonia synthesis.

Why are specific materials like stainless steel used for diffusers?

To resist corrosion from ammonia mixtures and withstand high pressures and temperatures, ensuring durability and safety in harsh industrial environments.

How does a vaned diffuser differ from a vaneless one?

Vaned diffusers use aerodynamic vanes to guide flow precisely for higher efficiency at design points, while vaneless diffusers offer simpler, more robust operation across a wider range but with lower peak efficiency.

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URN:CNFX:ME:UNIT:DIFFUSER