Decision inputs
- Water depth and external pressure
- Seal type and preload demand
- Design life and unmanned interval
- Power supply limits
- Installation and retrieval process
APPLICATION SOLUTION
Marine & offshore sealing and holding
Subsea valve actuators, collet connectors and ship thrust bearings use disc springs for power-off holding, seal preload and longitudinal vibration isolation; this page summarizes operating boundaries, construction patterns and test verification.
ENGINEERING PROBLEM
Subsea valves, connectors and thrust bearings require stable seal preload and low-power holding under deepsea pressure and long unmanned service.
BOUNDARY
This page describes a decision pattern and does not promise size or performance for another operating condition.
Solution pattern
- All-electric subsea gate valve actuators hold on disc springs without continuous power
- Collet connectors keep metal seals preloaded by springs
- Thrust bearings with internal disc springs isolate longitudinal vibration
Key risks
- Seawater corrosion and hydrogen embrittlement
- Long-term creep relaxes preload
- Longitudinal vibration transmits into shafting
Verification plan
- Pressure and sealing tests
- Measured preload retention and holding power
- Longitudinal vibration analysis
- Material and coating review
Source-backed correspondences
| Summary | Load | Travel | Source |
|---|---|---|---|
| 海洋/离岸密封——按sealing目标预选产品族；场景摘要仅供决策参考，不构成对其他工况的产品承诺。 | 按密封/活载荷目标 | 密封补偿行程 | Source ↗ |
Evidence (library locators)
Every technical claim traces to a specific asset version and page; restricted sources show locator metadata only.
- 158 2021 CJR XiaJi Shafting Disc Spring Longitudinal Damper pdf PDF p.5 · mechanism(internal source; excerpt not public)
- 155 2020 JMSE Yun Subsea Collet Connector Lens Seal pdf PDF p.1 · mechanism(internal source; excerpt not public)
- 156 2022 Machines Liu Subsea Connector Thermal Seal Contact pdf PDF p.1 · mechanism(internal source; excerpt not public)
- pl 2018 FEM Rigid Riser Joint Disc Spring Bolt Preload POMR PDF p.1 · mechanism(internal source; excerpt not public)
- TransNav 2020 Spring loaded Winch Band Brakes Belleville Mooring PDF p.1 · mechanism(internal source; excerpt not public)
- 160 2025 JMSE Zhang Deepwater Subsea Electric Gate Valve Actuator pdf PDF p.8 · mechanism(internal source; excerpt not public)
- 2021 CJR XiaJi Shafting Disc Spring Longitudinal Damper PDF p.2 · mechanism(internal source; excerpt not public)
- 217 US8439567B1 Disc springs carrier plate preload assembly 碟簧 承载板推力轴承预紧组件 PDF p.1 · mechanism(internal source; excerpt not public)
- pl 2018 FEM Rigid Riser Joint Disc Spring Bolt Preload POMR PDF p.2 · numeric(internal source; excerpt not public)
- pl 2018 FEM Rigid Riser Joint Disc Spring Bolt Preload POMR PDF p.2 · numeric(internal source; excerpt not public)
- pl 2018 FEM Rigid Riser Joint Disc Spring Bolt Preload POMR PDF p.3 · numeric(internal source; excerpt not public)
- pl 2018 FEM Rigid Riser Joint Disc Spring Bolt Preload POMR PDF p.4 · numeric(internal source; excerpt not public)
- pl 2018 FEM Rigid Riser Joint Disc Spring Bolt Preload POMR PDF p.4 · numeric(internal source; excerpt not public)
- pl 2018 FEM Rigid Riser Joint Disc Spring Bolt Preload POMR PDF p.5 · numeric(internal source; excerpt not public)
Cases illustrate decisions and do not constitute a specification promise for any other operating condition.
ENGINEERING REVIEW