1. Overview of the fatigue testing machine for railway spring bar fasteners

1. Use characteristics:

    The PMW-400-500 type electro-hydraulic railway spring bar fastener fatigue tester is mainly used for the dynamic pulsation fatigue test of the railway spring bar fastener assembly. It can also be used for the fatigue test of railway locomotive axles and railway rail fatigue test. Various large parts such as concrete structural parts, steel rails and their welded joints, bridges, various trusses, automobile chassis, automobile front and rear bridges, locomotive bogies and various large components are subjected to static compression tests and unidirectional dynamic pulsation fatigue tests. It is a fatigue life test and detection system with a wide range of applications, reliable performance and low operating cost in the field of fatigue performance testing in traffic and railways. PMW series electro-hydraulic pulsation fatigue testing machine adopts a unique crank connecting rod swing rod mechanism to realize the pulsating sine wave loading of the test piece, and adopts the best energy-saving design, which is 20% of the energy consumption of the same specification electro-hydraulic servo fatigue testing machine. One part!

2. Reference standard of fatigue testing machine for railway spring bar fasteners:

2.1 European Standard "EN13146-4 Railway Application-Track-Fastening System Test Method-Part 4: Effects of Repeated Loading"

2.2 The Ministry of Railways of the People's Republic of China "Interim Technical Requirements for Fastening Systems for Passenger Dedicated Lines"

3. Main components of the railway spring bar fastener testing machine:

The test system consists of a hydraulic pulsator with a displacement of 400ml/min (including the host and controller), a 500KN hydraulic actuator, a gantry test loading frame system and special test aids for railway fasteners, and computer data Collection and processing system, system, attachments, etc.

2. Main technical parameters of fatigue testing machine for railway elastic fasteners

1. Host (maximum displacement of pulsator 400ml)

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 500kN actuator:

6.1 Maximum amplitude: 15mm;

6.2 The maximum stroke of the piston: 120mm;

6.3 Maximum screw extension: 450mm;

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

6.5 Computer full scale display value: 9999.9;

6.6 There are also actuators (special accessories) of 25kN, 50kN, 100kN, 250kN and other specifications.

7. Motor power: 11kW.