Disc Springs (Belleville Washers)
A general-purpose elastic element per GB/T 1972 — wherever high force must fit into a small axial space.
Disc spring stacks provide the contact pressure and over-travel compensation in embedment-pole (固封极柱) vacuum interrupters — a demanding, safety-critical duty.
Placed under bolts to maintain constant clamping force through thermal cycling and vibration — prevents loosening in flanges and bearings.
Safety and control valves use stacks for precise set-pressure response and compact spring packs.
Die cushions and clamping stacks where coil springs would need three times the length for the same force.
Calibrated stacks slip or flatten at a set load, protecting gearboxes, couplings and structures.
The standard's own scope statement (GB/T 1972 introduction) — elastic elements across mechanical, chemical, aerospace and construction equipment.
| Arrangement | Effect on force | Effect on travel |
|---|---|---|
| Single | F₁ | h₀ |
| Parallel (stacked same way, n discs) | ≈ n × F₁ | h₀ |
| Series (face to face, i discs) | F₁ | ≈ i × h₀ |
| Combination (n × i) | ≈ n × F₁ | ≈ i × h₀ |
Friction between parallel discs adds damping — useful where vibration must be absorbed. Stack guidance requires hardened, ground guide surfaces.
Describe the duty — force, travel, space, cycles — and we will propose a stack.
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