1. Overview of rail fatigue testing machine

1. Use characteristics:

     PMW-800-500 electro-hydraulic railway rail fatigue testing machine is mainly used for the fatigue performance of rails, rails, rail welded joints, rail welding, sleepers, sleeper pads, fastener assembly, bogies, subgrades, bridge components, etc. According to the test, the system fully complies with TB/T3120-2005 "AT Rail Welding", TB/T3109-2005 "AT Rail", TB/T2491-1994 "Fatigue Test Method for Fastener Assembly" and "Interim Technical Conditions for Fastener System of Passenger Dedicated Lines" 》And other railway industry standards on fatigue performance test methods. Equipped with corresponding test equipment, it can also be used to perform unidirectional pulsation compression and bending fatigue tests on various large parts, components and components, and can test various bridges, trusses, automobile chassis and front and rear bridges, round springs, leaf springs and various steel bars. Concrete components are subjected to unidirectional pulsation fatigue life tests, which are widely used in the fatigue performance testing of structural parts and components in railway, automobile, transportation, construction, coal and other industries. This series of testing machines have reasonable structure, reliable operation, no need for cooling, energy saving and environmental protection, low operating costs, and a wide range of applications. The PMW series electro-hydraulic pulsation fatigue testing machine adopts a unique crank connecting rod swing rod mechanism to realize the pulsation of the test piece Sine wave loading, using the best energy-saving design, is one twentieth of the energy consumption of the same specification electro-hydraulic servo fatigue testing machine!

2. Reference standards for fatigue testing machines for railway rails and welded joints:

2.1 "TB/T3109-2005AT Rail"

2.2 "TB/T1632.1-2005 Rail Welding Part 1 General Technical Conditions"

2.3 "TB/T3120-2005AT rail welding"

3. Main components of fatigue testing machine for railway rails and welded joints:

    The test system consists of a hydraulic pulsator with a displacement of 800ml/min (including the main engine and the controller), a 500KN hydraulic actuator, a gantry test loading frame system and special test aids for railway rails and welded joints, Computer data acquisition and processing system, system, attachments, etc. According to customer test requirements, up to 4 500KN actuators can be configured for fatigue test at the same time.

2. Main technical parameters of railway rail and welded joint fatigue testing machine

1. Host (maximum displacement of pulsator 800ml)

2. Maximum dynamic test force: 500kN;

3. Maximum static test force: 500kN, indication accuracy ±1% (relative error of indication value from 20%FS);

4. Operating frequency range: 2-8Hz (steplessly adjustable);

5. The maximum displacement of the pulsator: 400ml/time;

6. Basic parameters of actuator:

6.1 500kN actuator

6.1.1 Maximum amplitude: 30mm;

6.1.2 The maximum stroke of the piston: 120mm;

6.1.3 Maximum extension of lead screw: 450mm;

6.1.4 Length of extension pipe: 500mm, 1000mm;

6.2 100kN actuator

6.2.1 Maximum amplitude: 120mm;

6.2.2 The maximum stroke of the piston: 120mm;

6.2.3 Maximum extension of lead screw: 450mm;

6.2.4 Length of extension pipe: 500mm, 1000mm;

6.3 Actuators of other specifications: 25kN, 50kN, 100kN, 250kN, 1000kN, 2000kN and other specifications actuators are optional (special accessories).

7. Motor power: 22kW.