Decision inputs
- Trip force window and tolerance
- Safety factor and redundancy
- Service environment and life
- Code acceptance requirements
APPLICATION SOLUTION
Safety device overload protection
Safety devices such as elevator safety gears and safety clutches use disc springs to set trip force and hold constant retention; this entry page lists safety redundancy decision points.
ENGINEERING PROBLEM
Safety devices must hold the set trip force through service life; both false trips and failures to trip are unacceptable.
BOUNDARY
This page describes a decision pattern and does not promise size or performance for another operating condition.
Solution pattern
- Disc spring groups set and hold trip force
- Friction pairs with springs give resettable trips
- Parallel redundancy per safety integrity level
Key risks
- Wear and relaxation shift trip force
- Contamination and corrosion binding
- Poor reset after tripping
Verification plan
- Trip force calibration and re-test
- Trip and reset testing
- Periodic safety inspection
Source-backed correspondences
| Summary | Load | Travel | Source |
|---|---|---|---|
| 安全装置过载保护——按overload-protection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。 | 按过载限值目标 | 过载行程 | Source ↗ |
Evidence (library locators)
Every technical claim traces to a specific asset version and page; restricted sources show locator metadata only.
- 365 US3704765 Overload Clutch Duff Norton 1972 PDF p.1 · mechanism(internal source; excerpt not public)
- 363 TK Elevator AQ32KB DS2 渐进式安全钳安装使用说明书 PDF p.1 · mechanism(internal source; excerpt not public)
- 2001 JSMETLD UltraHighSpeed Elevator Safety Gear Friction PDF p.1 · mechanism(internal source; excerpt not public)
- 363 TK Elevator AQ32KB DS2 渐进式安全钳安装使用说明书 PDF p.2 · mechanism(internal source; excerpt not public)
- US4311220 LiftingPlatform SafetyCatch DiscSpring ClampingDiscs PDF p.1 · mechanism(internal source; excerpt not public)
- 2001 JSMETLD UltraHighSpeed Elevator Safety Gear Friction PDF p.1 · numeric(internal source; excerpt not public)
- 2001 JSMETLD UltraHighSpeed Elevator Safety Gear Friction PDF p.1 · numeric(internal source; excerpt not public)
- 2001 JSMETLD UltraHighSpeed Elevator Safety Gear Friction PDF p.2 · numeric(internal source; excerpt not public)
- 2001 JSMETLD UltraHighSpeed Elevator Safety Gear Friction PDF p.2 · numeric(internal source; excerpt not public)
- 363 TK Elevator AQ32KB DS2 渐进式安全钳安装使用说明书 PDF p.4 · numeric(internal source; excerpt not public)
- 367 防坠安全器常见问题分析及解决措施 施工升降机 期刊 技术资料 PDF p.2 · numeric(internal source; excerpt not public)
- US4311220 LiftingPlatform SafetyCatch DiscSpring ClampingDiscs PDF p.3 · numeric(internal source; excerpt not public)
Cases illustrate decisions and do not constitute a specification promise for any other operating condition.
ENGINEERING REVIEW