行业组件数据 · 2026

活塞杆(连接件)

A precision-machined rod that transmits linear force between piston and crankshaft in reciprocating machinery.

技术定义与适配语境
典型 活塞杆(连接件) 会按材料、尺寸公差、适配关系和失效风险在 机械和设备制造 中评估。

The piston rod is a critical connecting component in piston/liner assemblies that transfers the linear motion and force generated by combustion or hydraulic pressure from the piston to the crankshaft or other driven mechanism. It serves as the structural link that converts reciprocating motion into rotational torque while maintaining precise alignment and minimizing friction losses.

组件规格

定义
The piston rod is a critical connecting component in piston/liner assemblies that transfers the linear motion and force generated by combustion or hydraulic pressure from the piston to the crankshaft or other driven mechanism. It serves as the structural link that converts reciprocating motion into rotational torque while maintaining precise alignment and minimizing friction losses.
工作原理
The piston rod operates on the principle of force transmission through rigid body mechanics. During the power stroke, combustion or hydraulic pressure exerts force on the piston, which transfers this force axially through the piston rod to the connecting rod and crankshaft. The rod must maintain perfect alignment to prevent bending moments while withstanding compressive, tensile, and buckling forces throughout the operating cycle.
材料
Typically forged or machined from high-strength alloy steels (AISI 41404340or EN24)often chrome-plated or nitrided for wear resistance. Alternative materials include titanium alloys for weight-critical applications or stainless steels for corrosive environments.
Hardness
HRC 45-55
Length Range
100-2000 mm
Straightness
0.05 mm/m
Load Capacity
50-500 kN
Surface Finish
Ra 0.4 μm max
Diameter Tolerance
±0.01 mm
标准
ISO 13709DIN 9760API 674

行业分类与别名

活塞杆(连接件) 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

Insufficient surface hardness->Accelerated wear and scoring->Specify appropriate hardening process (chrome plating, nitriding) and maintain proper lubrication
Misalignment during installation->Bending fatigue and premature bearing wear->Use precision alignment tools during assembly and implement laser alignment verification
Corrosive environment exposure->Pitting and stress corrosion cracking->Select corrosion-resistant materials (stainless steel, coated alloys) and implement protective covers

工业生态与工程逻辑

0
Fatigue failure from cyclic loading
1
Wear and scoring from misalignment
2
Corrosion in humid/chemical environments
3
Buckling under compressive overload
4
Thread stripping at connection points

合规与检测

tolerance
Geometric tolerances per ISO 1101, dimensional tolerances per ISO 286
test method
Dimensional verification with CMM, hardness testing per ASTM E18, non-destructive testing per ASTM E1444 (MPI) and ASTM E114 (UT)

制造该组件的工厂

来自 CNFX 组件能力表的相关制造商资料。

制造商列表用于前期研究和供应商能力理解,不代表认证、排名或交易担保。

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 difference between piston rod and connecting rod?

The piston rod connects directly to the piston and transmits linear force, while the connecting rod links the piston rod/crosshead to the crankshaft, converting linear to rotational motion.

How often should piston rods be inspected?

Visual inspection every 500 operating hours, dimensional inspection every 2000 hours, and non-destructive testing (magnetic particle or ultrasonic) annually or per manufacturer specifications.

What causes piston rod failure?

Common causes include fatigue cracking from cyclic loading, wear from misalignment, corrosion in harsh environments, and buckling from excessive compressive loads.

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CNFX Industrial Component Index · 机械和设备制造

数据基础

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初步技术归类
本页用于结构化准备研究、RFQ 和供应商评估,不替代买方自己的供应商资质审查、标准核验和技术批准。

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URN:CNFX:ME:UNIT:PISTON_ROD_CONNECTION_