Air Spring Fatigue Testing Machine

Servo dynamic test bench for air bellows, used for cyclic durability, air tightness and performance attenuation verification of air springs

Product Overview

This air spring fatigue testing machine adopts servo reciprocating driving system with independent air pressure control module. It is specially designed for air springs used in railway bogies, commercial vehicles, buses and industrial vibration isolation equipment. It can maintain preset inflation pressure inside the air spring while applying vertical cyclic displacement loading, and optional lateral shear loading function is available. The equipment monitors air pressure change, sealing performance, load variation and bellows surface state continuously during long cycle test. It is used to assess fatigue life, air leakage risk, rubber crack and stiffness degradation of air spring bellows. Multi-station fixture layout can be configured to improve test throughput. The supporting software supports cycle counting, automatic stop at preset cycles, abnormal alarm and continuous data recording. It is widely used for new product development, type approval and batch quality inspection of air spring manufacturers and professional testing organizations.

Applicable International Standards

The system is designed to comply with the following recognized testing standards:

EN 13597 — Railway applications — Air springs for rolling stock
UIC 515-3 — Bogies — Suspension components and air spring requirements
ISO 4666-3 — Rubber, vulcanized — Fatigue resistance and temperature rise test
ISO 7500-1 — Metallic materials — Calibration of static uniaxial testing machines

Note: Specific compliance depends on model configuration, force sensor selection and customized fixture design. Customized fixtures and test schemes for extra testing standards are available upon request.

Key Features

Integrated air pressure control — Independent air supply and pressure stabilizing unit, keep constant internal pressure of air spring during dynamic test.
Optional force range — 0.1 ~ 100 kN, multiple sensor options, and can be configured according to customer test requirements, replaceable sensors for different air spring specifications.
Vertical & lateral combined loading optional — Simulate bogie working condition with vertical excitation plus horizontal shear load.
Real-time air tightness monitoring — Track pressure drop, trigger alarm and record cycle number once leakage occurs.
Flexible waveform setting — Support sine wave and custom reciprocating waveform for durability cycle test.
Optional multi-station structure — 2-station, 4-station layout for simultaneous testing of multiple air spring samples.
Professional test software — Record force, displacement, air pressure, cumulative cycles and export complete durability reports.
Complete safety protection — Over-force, over-stroke, air pressure over-limit and emergency stop protection functions.

Technical Specifications

Parameter	Specification
Test Mode	Vertical reciprocating fatigue test, vertical + lateral combined fatigue test, air tightness monitoring test
Force Range	0.1 ~ 100 kN, multiple sensor options, customized according to test requirements
Force Accuracy	±0.5% of indicated value
Stroke Range	0 ~ ±200 mm (Customizable)
Frequency Range	0.1 ~ 10 Hz
Displacement Resolution	0.001 mm
Air Pressure Range	0 ~ 1.0 MPa, automatic pressure stabilization
Specimen Type	Railway air spring, bus air spring, truck air spring, industrial isolation air bellows
Station Quantity	1 / 2 / 4 stations (Optional, customized)
Output Data	Force, displacement, frequency, internal air pressure, cumulative cycles, pressure drop curve
Power Supply	AC 380 V / 50 Hz (depends on configuration)

Specifications vary by model configuration, force sensor selection and customized fixture. Large stroke, high load and special air pressure versions can be customized for railway and commercial vehicle air spring testing.

Typical Applications

Railway transit industry — Durability fatigue test of bogie secondary air springs for rail vehicles.
Commercial vehicle sector — Cycle test for air springs of buses, heavy trucks and semi-trailers.
Automotive suspension R&D — Evaluation of air bellow fatigue, sealing performance and stiffness stability.
Vibration isolation engineering — Long-term reliability verification for industrial air spring vibration isolators.
Third-party testing institutions — Type test and certification service for air spring products complying with EN and UIC standards.