I. Overview

1. The PMW-800-500 tri-position electro-hydraulic concrete sleepers' pulsation fatigue testing system is primarily used for static compression tests and unidirectional dynamic pulsation fatigue tests on concrete sleepers. By adding a pulsation actuator and corresponding auxiliary testing equipment, it can also be employed for railway steel rails (extra-heavy, heavy, standard steel rails) and their welded joints, fasteners, concrete sleepers, and helical springs. It is also suitable for testing various large components, such as bridges, trusses, vehicle undercarriages, automotive axles, locomotive bogies, building components, anchors, and connectors, for static compression tests and unidirectional dynamic pulsation fatigue tests. It is a widely used, reliable, and cost-effective fatigue life testing and detection system in the field of dynamic load fatigue performance testing for railways and transportation. PMW series electro-hydraulic pulsationFatigue Test MachineRationally designed, reliable operation, low cost of operation, no need for cooling, energy-saving and environmentally friendly, with a wide range of applications.

2. Applicable Test Methods and Standards:

"TB/T 1878-2002 Method for Fatigue Testing of Prestressed Concrete Sleepers"

2) "TB/T 1632.1-2014 Steel Rail Welding Part 1: General Technical Conditions"

3) TB/T 1632.2-2014: Part 2 - Flash Welding of Rails

4) TB/T 1632.3-2014 Steel Rail Welding Part 3: Thermite Welding

5) "CECS 429: 2016 Standard for Quality Inspection of Flash Welding for Trough Rail Used in Urban Railways"

6) "CECS 430: 2016 Standard for the Quality Inspection of Aluminothermic Welding of T-Slab Rail for Urban Railways"

7) "TB/T 3396.4-2015: Test Methods for Fastener Systems of High-Speed Railways, Part 4: Assembly Fatigue Performance Test"

8) "TB/T 2491-1994 Method for Fatigue Test of Fastener Assembly"

9) Specification for Nuts and Bolts (Technology-based [2007] No. 207)

10) EN13146-4:2002 Railway Application — Rails — Fastening Systems — Test Methods — Part 4: Effects of Repeated Loading

11) "TB/T2211-2010 Steel Coiled Spring for Locomotive and Rolling Stock Suspension"

TB/T 1354-1979 Method for Physical Flexural Fatigue Testing of Steel Rails

3. System Composition

The PMW-800-500 type three-station electro-hydraulic rail bending fatigue testing system consists of 1 hydraulic pulsator with a displacement of 800L/cycle (including the main unit and controller), 3 500kN hydraulic actuators, 1 three-station testing loading frame, 3 rail bending and weld point fatigue testing auxiliary tools, 1 electrical control cabinet, 1 computer data acquisition and processing system, test pipeline system, and necessary accessories. This machine employs the latest measurement and control system, achieving automatic loading, automatic holding of static load, dynamic test force, and automatic technology operation modes, significantly reducing the time and workload of the operator.。

II. Main Technical Specifications:

Maximum Dynamic Test Force: 500 kN

2. Maximum Static Test Force: 500 kN, Indication Accuracy ±1% (Relative Error of Indication Starts from 20% FS)

3. Frequency Range: 2-8 Hz (variable speed)

4. Maximum pulsation displacement: 800ml/each

5. Maximum Theoretical Amplitude: 15mm

6. Maximum Travel: 120mm

7. Maximum Lead Extension: 450mm

8. Extended tube length: 500mm, 1000mm

9. Full-scale display value of the computer: 500.0

10. Additional actuators (special accessories) in specifications of 25kN, 50kN, 100kN, 250kN, and 1000kN are available.

11. Motor Power: 22kW.