行业组件数据 · 2026

密封件和衬套

Seals and bushings are precision components in actuation mechanisms that prevent fluid leakage, reduce friction, and maintain alignment between moving parts.

技术定义与适配语境
典型 密封件和衬套 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。

Seals and bushings are critical components in actuation mechanisms designed to create barriers against fluid or gas leakage, minimize wear between moving surfaces, and ensure proper alignment. Seals typically function by creating a tight interface between stationary and moving parts, while bushings serve as sleeves or liners to reduce friction and absorb radial loads. In industrial applications, they enhance operational efficiency, extend equipment lifespan, and prevent contamination in systems like hydraulic cylinders, pneumatic actuators, and rotating shafts.

组件规格

定义
Seals and bushings are critical components in actuation mechanisms designed to create barriers against fluid or gas leakage, minimize wear between moving surfaces, and ensure proper alignment. Seals typically function by creating a tight interface between stationary and moving parts, while bushings serve as sleeves or liners to reduce friction and absorb radial loads. In industrial applications, they enhance operational efficiency, extend equipment lifespan, and prevent contamination in systems like hydraulic cylinders, pneumatic actuators, and rotating shafts.
工作原理
Seals operate on principles of compression, lip sealing, or mechanical face sealing to block fluid passage, relying on elastomeric or polymeric materials that deform under pressure. Bushings work by providing a low-friction interface between a shaft and housing, often using self-lubricating materials or grease-filled designs to reduce wear. Both components maintain system integrity by compensating for thermal expansion, vibration, and misalignment.
材料
Common materials include nitrile rubber (NBR)fluorocarbon (Viton)polyurethane (PU)polytetrafluoroethylene (PTFE) for sealsand bronzesintered metalscomposite polymersor graphite-impregnated alloys for bushings. Material selection depends on factors like temperature range (-40°C to 200°C)pressure (up to 5000 psi)chemical resistanceand load capacity.
Hardness
70-90 Shore A for seals, 60-80 HRB for bushings
Load Capacity
Up to 50 kN for bushings
Pressure Rating
Up to 5000 psi
Friction Coefficient
0.05-0.15 for PTFE bushings
Operating Temperature
-40°C to 200°C
标准
ISO 3601ISO 6194DIN 3760DIN 1494

行业分类与别名

密封件和衬套 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

Improper installation or misalignment->Seal extrusion or bushing wear->Use alignment tools during assembly and follow torque specifications
Material incompatibility with operating fluids->Swelling, cracking, or hardening of seals->Verify chemical resistance charts and conduct compatibility testing
Excessive pressure or temperature->Premature degradation or leakage->Select materials rated for higher ranges and install pressure relief valves

工业生态与工程逻辑

0
Leakage leading to system failure
1
Excessive wear causing downtime
2
Material degradation under high temperatures
3
Misalignment-induced damage

合规与检测

tolerance
Dimensional tolerances per ISO 286 for shafts and housings, typically H7/g6 or H8/f7 fits
test method
Leakage testing per ISO 9978, wear testing per ASTM D3702, pressure testing per ISO 6605

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 seals and bushings?

Seals primarily prevent fluid or gas leakage between components, while bushings reduce friction and wear between moving parts like shafts and housings.

How do I select the right material for seals and bushings?

Consider operating temperature, pressure, chemical exposure, and load. For example, use NBR for general-purpose oils, PTFE for high-temperature or chemical resistance, and bronze for heavy-load bushings.

What are common failure modes for seals and bushings?

Failures include extrusion, wear, hardening, cracking, or swelling due to improper installation, material incompatibility, excessive pressure, or contamination.

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CNFX Industrial Component Index · 机械和设备制造

数据基础

CNFX 制造商资料、技术分类、公开产品信息和持续合理性检查。

初步技术归类
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URN:CNFX:ME:UNIT:SEALS_AND_BUSHINGS