Decision inputs
- Bearing diameter and roller configuration
- Design radial/axial loads
- Clearance target and tolerance
- Assembly and overhaul process
- Sealing and lubrication
APPLICATION SOLUTION
TBM main bearing preload
TBM main bearings use spring washer systems urging an elastic raceway ring to cancel clearance, with a spring-biased thrust ring enabling axial clearance measurement; this page outlines the preload construction, measuring method and inspection points.
ENGINEERING PROBLEM
TBM main bearings are large and heavily loaded, and clearance directly governs raceway life; assembly and overhaul require measurable clearance control and elastic preload.
BOUNDARY
This page describes a decision pattern and does not promise size or performance for another operating condition.
Solution pattern
- An elastic raceway ring is urged against the rollers by spring washer systems to cancel clearance
- A spring-biased thrust ring with a screw creates measurable clearance for inspection
- After measurement the spring system cancels operating clearance automatically
Key risks
- Spring system failure lets clearance return and damages raceways
- Measurement process errors
- Uneven elastic ring deformation under heavy load
Verification plan
- Rehearsed axial clearance measuring procedure
- Force-displacement calibration of spring elements
- Assembly and preload records
- Operating temperature and vibration tracking
Source-backed correspondences
| Summary | Load | Travel | Source |
|---|---|---|---|
| TBM 主轴承预紧——按preload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。 | 按主轴承预紧力目标 | 轴向游隙补偿 | Source ↗ |
Evidence (library locators)
Every technical claim traces to a specific asset version and page; restricted sources show locator metadata only.
- 460 US11754117B2 SKF Rolling Bearing Spring System Belleville TBM大直径主轴承预紧 PDF p.5 (OCR) · mechanism(internal source; excerpt not public)
Asset details → · access method in preparation
- 461 US11313413B2 SKF Rolling Bearing Spring Biased Thrust Ring 轴向游隙测量 TBM轴承 PDF p.7 (OCR) · mechanism(internal source; excerpt not public)
Asset details → · access method in preparation
- EP2851575B1 SKF Rolling Bearing Assembly Spring Washer Preload 大型轴承弹簧垫圈预紧消除轴向游隙 PDF p.2 · mechanism(internal source; excerpt not public)
- 460 US11754117B2 SKF Rolling Bearing Spring System Belleville TBM大直径主轴承预紧 PDF p.7 (OCR) · mechanism(internal source; excerpt not public)
Asset details → · access method in preparation
- EP2851575B1 SKF Rolling Bearing Assembly Spring Washer Preload 大型轴承弹簧垫圈预紧消除轴向游隙 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