1. Structural Overview
Two supports are fixed onto the base with nuts, and their upper ends are secured to the upper beam. Two additional supports are fixed to the middle beam and operating platform, together forming a space for fixing specimens during tension, compression, and bending tests.
When oil from the pump lifts the piston, the operating platform rises, raising the two supports and the upper beam. The upper jaw and middle jaw are located on the upper beam and middle beam, respectively. The middle beam is raised or lowered by screws running on the two supports. A lift control button with up/down markings is provided.
2. Oil Cylinder and Piston
The oil cylinder and piston are the most critical components of the main body. Their contacting surfaces are precision-finished, with appropriate clearance and oil film, allowing the piston to move freely and minimizing friction. As oil flows from the pump into the cylinder, the piston rises along with the beam and operating platform until load is applied to the specimen.
Important: Oil must be kept pure and free from impurities or iron dust. Contaminants entering the cylinder via the pump or valves can damage the surface finish of the cylinder and piston, affecting test accuracy. During installation, any dirt or soil on the upper contacting surfaces of the cylinder and piston must be cleaned first.
3. Accessories
The machine is supplied with various tension and compression accessories.
Dynamometer
1. Concept
The dynamometer consists of a digital display controller, sensor, high-pressure oil pump, and other operating components. All parts are enclosed in a simple, smooth, and aesthetically designed steel shell. Each shell surface has a door for inspection, adjustment, and maintenance, while also keeping bearings and precision parts clean and in good working condition.
2. High-Pressure Oil Pump and Motor
The high-pressure oil pump and motor are flange-connected to the oil tank cover. The pump is an axial plunger type consisting of seven sets of pistons. The pistons and sleeves have high surface finish and precise fit, ensuring high pressure capability and minimal oil leakage.
3. Operating Panel
The high-pressure pump motor button, power button, and indicator lights are all installed on the dynamometer panel. The feed oil valve (also known as the pressure regulating valve) controls oil flow from the pump to the cylinder and regulates loading speed. The reflux valve unloads pressure, allowing oil in the working cylinder to return to the tank.
4. Hydraulic Drive System
Oil from the tank passes through a strainer into the pump, then is delivered to the feed valve via the pump pipeline.
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When the feed oil handwheel is closed: Piston is pushed open by oil pressure, and oil returns to the tank.
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When the feed oil handwheel is open: Oil enters the working cylinder through the pipeline, then passes through the pressure pipeline and reflux valve body before returning to the tank.
Model EI-XLC300B EI-XLC600D EI-XLC1000D / EI-XLC1200D EI-XLC2000D Structure Four Column with Two Reeling Screws Load Frame Maximum Load Capacity 300kN 600kN 1000kN / 1200kN 2000kN Force Range 2% ~ 100% FS Force Accuracy ±1% Resolution 1/500000 FS Adjustment Range of Stress Rate Control 1MPa/s ~ 60MPa/s Deformation Accuracy ±1% Deformation Resolution 1/500000 of Max Extension Adjustment Range of Strain Rate Control 0.00025/s ~ 0.0025/s Accuracy of Strain Rate Control ±2% Displacement Resolution 0.001mm Adjustment Range of Displacement Rate Control 0.00025/s ~ 0.0025/s Accuracy of Displacement Rate Control ±2% Range of Holding Control of Stress, Strain and Displacement 0.3% ~ 100%FS Accuracy of Holding Control of Stress ±1% Tensile Space 650mm 650mm 700mm 1300mm Compression Space 550mm 550mm 550mm 1000mm Column Space 430mm 450mm 550mm 450mm Round Specimen Clamping Range Ø6 ~ Ø26mm Ø6 ~ Ø40mm Ø6 ~ Ø45mm Ø20 ~ Ø65mm Flat Specimen Clamping Thickness 0 ~ 30mm 0 ~ 50mm Maximum Width of Flat Specimen Clamping 75mm 140mm Pressure Plate Dimension Ø160mm Ø300mm Rate Voltage Three Phase, AC415V 50Hz Frame Dimension (mm) 840 x 700 x 2200 910 x 830 x 2300 1200 x 880 x 3300 Oil Source Console Dimension 1150 x 800 x 1000mm Weight (Approx.) 2000kg 2300kg 3200kg 9000kg
