1. Introduction to series products

The DPS series electro-hydraulic servo dynamic and static fatigue test bench is one of the series of dynamic fatigue loading test system products developed by our company. This series of products have the characteristics of wide output force range, high control precision, convenient use and high reliability. 

According to the characteristics of automobile leaf springs, this test bench has specially developed high-rigidity fixed gauge mainframe loading unit and hydraulic power unit, which can meet the detection and test of ear spring, no ear spring, one end with ear and the other without ear spring, so there are any other types The incomparable advantage of the testing machine is the most respected material testing equipment in the field of leaf spring fatigue mechanics.

Main unit parts of the test system:

Four-column double-guided high-rigidity host: 1 set; 

21MP, 110L Siemens PLC intelligent control constant pressure silent servo pump station (oil source): 1 set; (including relay oil separator and relay energy storage system)

Special test software package for dynamic and static leaf spring fatigue: 1 set;

Standard version of measurement and control software package: 1 set

Imported measuring sensors (force, displacement): 1 set

Leaf spring test aids: 1 set;

Computer, printer: 1 set;

Pipes, accessories, tools, etc.: 1 set; 

2.The main technical indicators of the system

2.1 Test force unit:

Maximum dynamic test force: ±25kN;

Effective measurement range: 2%-100%FS in the whole process without bins;

Static test force indication accuracy: less than ±0.5%; dynamic test force indication accuracy: less than ±1.0%;

Average load fluctuation of test force: less than ±1%;

Dynamic load fluctuation of test force: less than ±2%;

Distance between columns: 1000mm

2.2 Displacement unit:

The maximum displacement of the system: not less than ±125mm (the total stroke is not less than 250mm)

Dynamic displacement control accuracy≤±0.5%FS; dynamic force control accuracy≤±1%;

Displacement resolution: 0.001mm

2.3 Actuator index:

The effective stroke of the actuator: ±80mm~ ±150mm;

Maximum working pressure: 21MPa;

Maximum test force: ±25KN;

Front flange connection, installed above the upper beam

2.4 Test frequency: 0.1~5Hz;

2.5 Amplitude frequency coefficient: 60

2.6 Main test waveforms: sine wave, square wave, triangle wave, ramp wave, half sine, half triangle, various combination waveforms.

2.7 Test control mode: displacement closed-loop control---load display, load closed-loop control---displacement display;

2.8 Customized test grips, could satisfy below:

Leaf spring width 70~120mm

Leaf spring thickness 50~300mm

Maximum ear hole diameter 130mm

Center distance between ears of leaf spring 1000~2100mm

The inner width is 105 and 80, each supporting trolley is equipped with one set

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