1. Project overview of axle fatigue testing machine

1. Purpose:

       PMW-800-1000 electro-hydraulic axle fatigue testing machine is mainly used for vertical bending fatigue test, vertical bending static strength test and vertical bending rigidity test of large-scale automobile drive axle housings. It can also be used for parts and large structural parts. Static load, dynamic load performance test and dynamic load fatigue life test are the current fatigue performance testing fields for quality inspection, scientific research, universities, construction, highways, railways, bridges, automobiles, machinery, nuclear power, water conservancy, ports, tunnels, coal and other industries , A fatigue life test system with a wide range of applications, reliable performance and low operating cost. The system is equipped with corresponding functional attachments to realize the alignment of typical concrete structures such as beams, columns, slabs, frames, bridges (full scale, models), sleepers, rails and their welded joints, steel trusses, rubber bearings, fastener assembly, steel Stranded anchors, various springs, cables, spreaders, automobile chassis, automobile front and rear axles, locomotive bogies and various large components static load, dynamic load performance test and dynamic load fatigue life test. It is a fatigue life test and detection system with a wide range of applications, reliable performance and low operating costs in the fatigue performance testing fields of automobile manufacturing, highways, railways, and construction. 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!

Design Basis:

① This machine meets the requirements for vertical bending fatigue loading test of automobile drive axle axle housing in "QC/T533-1999 Automobile Drive Axle Bench Test Method".

② This machine meets the requirements for the vertical bending static strength test of the drive axle housing and the vertical bending rigidity test of the drive axle housing in the "QC/T534-1999 Automobile Drive Axle Bench Test Evaluation Index".

2. System composition

    PMW—800-1000 electro-hydraulic axle fatigue testing machine is mainly composed of: a hydraulic pulsator (including host and controller) with a displacement of 800L/min, a 1000kN hydraulic pulsation actuator, and an electrical control cabinet , A set of computer data acquisition and processing system, a 1000kN gantry test afterburner frame and special test tooling for axles, test piping system and necessary tooling.

    There are also various specifications of hydraulic pulsator (25kN, 50kN, 100kN, 250kN, 500kN) to choose from. All the actuators are shipped after a comprehensive performance test or ordered separately for users to complete multi-station (multiple Test points).

2. Main technical indicators of axle fatigue testing machine:

1. Maximum dynamic test force: 1000kN;

2. Maximum static test force: 1000kN, indication accuracy ±1% (relative error of indication value from 20%FS);

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

4. The maximum displacement of the pulsator: 800ml/time;

5. Basic parameters of 1000kN actuator:

5.1 Maximum amplitude: 15mm;

5.2 Maximum stroke of the piston: 120mm;

5.3 Maximum screw extension: 450mm;

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

5.5 Computer full scale display value: 500.0;

5.6 There are also actuators of 25kN, 50kN, 100kN, 250kN, 500kN and other specifications (special accessories, to be purchased separately).

6. Motor power: 22kW.