Bellows Fatigue Testing Machine

The Bellows Fatigue Testing Machine is designed to evaluate the fatigue performance, durability, and service life of various bellows, including metal bellows, plastic bellows, stainless steel bellows, copper bellows, expansion joints, diaphragm capsules, and other flexible components.

Application

The Bellows Fatigue Testing Machine is mainly used to evaluate the durability performance, compression fatigue, fatigue life, and dynamic/static mechanical properties of various bellows, including metal bellows, plastic bellows, stainless steel bellows, copper bellows, expansion bellows, diaphragm capsules, and other flexible components.The machine can perform various mechanical tests, such as tensile, compression, bending, high-cycle fatigue, low-cycle fatigue, fracture toughness, and crack propagation tests.With additional fixtures, the equipment can also be applied to the testing of dynamic performance, static performance, and fatigue life of various structural components and assemblies. It is widely used in product development, quality inspection, reliability evaluation, and research applications.

Applicable Standards

The Bellows Fatigue Testing Machine complies with the following standards:

GB/T 2611 — General Requirements for Testing Machines

GB/T 3075 — Metallic Materials — Fatigue Testing — Axial Force-Controlled Method

GB/T 16826 — Electro-Hydraulic Servo Universal Testing Machines

JB/T 9379 — Technical Conditions for Electro-Hydraulic Servo Fatigue Testing Machines

EJMA Standards — Standards of the Expansion Joint Manufacturers Association — Bellows Fatigue Test Requirements

ASME B31.3 — Process Piping — Fatigue Design Requirements for Bellows Expansion Joints

ISO 10785 — Space Systems — Bellows — Design and Operation (applicable to specific metallic bellows applications)

Technical Specifications

Structural Features

Backlash Elimination System

Equipped with a backlash compensation device to eliminate clearance between mechanical connections and universal spherical joints.

Automatically centers the applied force, reduces lateral forces, minimizes impact during high-frequency tension and compression tests, and improves test waveform quality.

Multi-Level Flexible Support Guide Mechanism

Adopts a multi-stage flexible support combined guiding structure.

Starting pressure is less than 0.3 MPa with no crawling phenomenon.

High-Performance Sealing System

Uses combined sealing structures, including high-pressure seals, low-pressure seals, and leakage drainage channels.

Ensures the hydraulic cylinder assembly operates without oil leakage.

Built-In Sensor Design

The sensor is integrated inside the piston rod, providing flexible movement and avoiding external interference.

Modular Seal Structure

The combined sealing structure features excellent interchangeability, making maintenance and replacement convenient.

Precision Machined Piston Rod

The piston rod is ultra-precision machined with chrome plating and polishing treatment.

Surface roughness reaches Ra 0.4 μm.

Cylinder Structure

Double-ended piston rod structure.

Double-acting hydraulic cylinder design.