Germany WILLE These advanced rock testing plants enable our customers to meet all test requirements in rock research testing per as ASTM standard or ISRM method.
The modular system can be configured with a variety of hydraulic cylinders, power packs, different jigs and attachments in order to perform uniaxial compressive strength, triaxial strength, post failure, bending, indirect tensile, direct tensile, fracture toughness, permeability, hydr-fracturing and creep tests for rock testing systems.
The systems are able to test a range of materials from soft rock (e.g. sandstone) to hard rock for different applications in rock mechanics research e.g. Exploration and production of fossil fuels, Mining and construction, Tunneling and Geothermal energy development.
A variety of jigs and attachments are available to perform uniaxial compressive strength, triaxial strength, post failure, bending, indirect tensile, direct tensile, fracture toughness, Hydr-fracturing, permeability, creep, flexural and cyclic loading tests.
GEOsys software, with several testing modules/applica-tions controls the test procedures, means it can work as a fully automated system and provides an easy way to create custom test modules. It enables the users to applying different stress paths or strain rates with real-time graphics with zoom and freeze functions for printer output at any time (after and during the test).
With many years of experience, we are able to tailor our products and services to your aims and needs. Our customized solutions can help you achieve unique and specific requirements. We approach each project individually, openly and would be proud to support you in achieving the desired laboratory testing system. We have the knowledge and experience to help with a variety of testing systems for different fields of high pressure/high temperature tests e.g:
• Rock mechanics research • Mining and construction • Tunneling` Exploration and production of fossil fuels • Geothermal energy development
Load Frame
Highly stiff and robustly constructed frame with custom-ized test area (customized clearances between columns and vertical clearance between platens) to accept different sample sizes for direct shear and triaxial tests.
The load frame optionally has a transparent test area guard for operator safety during tests. The load frame can have a fixed crosshead mounted on four columns to create a robust loading frame or can be manufactured as a wall type load frame.
• With differential pressure transducer with force measuring accuracy of ±1 % from 10 to100 % of machine capacity
• Integrated Stroke Transducer: High precision displacement stroke transducer, integrated directly into the hydraulic cylinder
• Different Frame Stiffness from 750 kN/mm up to 10.000 kN /mm (>10 X 10^9 N/m )
Hydraulic Power Pack
Our series of hydraulic power-packs supply smooth hydraulic fluid to actuators, hydraulic pressure intensifiers, and servo hydraulic testing machines to meet their testing system demands.
As the dynamic performance of a hydraulic system depends on input oil flow and pressure in cylinder therefor we offer a wide range of flowrates to meet required dynamic performance for your application. All components are mounted conveniently for easy access.
A key feature of our hydraulic power packs is that they offer demand-dependent flow-rate control, delivering at a constant pressure of 210, 280 or340 bar. They can locate beside or in greater distance from load frame.
An oil-to-water heat exchanger or air-cooling exchanger controls fluid temperature. A temperature switch turns the hydraulic power pack off when the temperature of the fluid exceeds a pre-set value – lights on a front panel are used to indicate temperature levels. Closed loop re-cooler system (chiller for Oil /Water Cooling) is available on request and can be integrated to the unit.
Front Panel Geography
indicators:Main switch、Emergency Stop、“Start”、“ON”(indicator light)、Reset、Manometer to operate pressures、Filter、Oil level (blinking)、Temperature (blinking)、Motor Temperature: The pump motor is overloaded、E-Stop: Illuminates after the emergency stop has been pressed
Air Cooling Method
Air cooling method uses a large fan which forces cooling air through the vanes of a radiator to reduce the temperature of hot oil quickly and efficiently. The hot oil is circulating in radiator to get cooler and gets working condition again. For large flow rate power pack, the fan generate larger amount of cooled air or it is recommended to use water cooling method.
Water Cooling Method
In this method a cooled water is reducing the temperature of oil to enable it to reach to working temperature condition. Depends on the flow rate of the power supply, the water flow rate be calculated correctly to give the good performance. The noise level of hydraulic supply units which use water cooling method is higher than Air cooled method. For example, the noise level of a hydraulic supply with flow rate of 7 LPM with water cooling method is 51dbwhich is super quiet while with air cooling is 62db (the values are measured in 1-meter distance form unit).
Hydraulic Fill And Flushing Unit
This unit combined with an oil reservoir provides the control of the pressure for filling and emptying of all relevant components, e.g. Triaxial cell, pressure intensifier and etc.
It is included of a fluid pump combined with a cooling circuit to reduce the temperature of oil and provide it for injecting in the system. In some system, it is integrated inside the power pack and in some systems, it comes as a separate unit.
• Including constant pressure pump
• Integrated water-cooling system to cool down the heated triaxial cells after testing
High Pressure/High Temperature Triaxial Cell
This is an advanced high-pressure/high temperature triaxial cell designed to test cylindrical rock specimens with diameters of up to 102mm, a length/diameter ratio of at least 2 under triaxial high pressure/temperature conditions. The axialload can reach up to 5,000 kN.
The cells are designed for testing the shear and creep characteristics of rock core or solid materials (e.g. granites, evaporates, cemented tills or clays) under triaxial stress conditions.
This series of triaxial cells fits inside various types of load frame that we produce. To apply confining pressure, we offer different types of high-pressure pump as well as pressure intensifiers in different pressure ranges.
Axial and radial strains are measured by internal axial and radial deformation measuring devices, which work in high pressure and high temperature conditions.
The cell sits on a sliding mechanism to move easier in and out of testing area for easy set-up of the specimen and cell wall removing. An automatic lifting mechanism in combination with laod frame is available as well.
Sliding Mechanism
The cell sits on a sliding mechanism to move easier in and out of testing area for easy set-up of the specimen and cell wall removing.
High Temperature ontrol Package
This package allows the user to control and monitor the temperature inside the triaxial cell and the rock from ambient temperatures to200°C with an accuracy of 0.1 °C inside the cell.
The package includes a heater coils, which are attached to a triaxial cell and thermocouple/s are installed inside triaxial cells. The signals come to a controller to conduct a feedback control of the temperature, which is shown on an external display (on request) and within the software. The whole package makes Small temperature gradient within the cell and sample.
Confining Pressure Intensifier(Cell Pressure System)
Our pressure intensifiers provide closed-loop, servo-controlled pressure to test samples. This can be used to generate confining or pore pressure in connection with multi-channel electronically controlled systems that manage servo-valves mounted to intensifiers. They are also used to measure permeability or for hydro-fracturing tests. Intensifiers can be used to measure flow in permeability tests as well as volume change in triaxial tests while the required pressure is applied.
Separate hydraulic power is needed to supply a primary power source to the pressure intensifier which in Rock triaxial tests is our main hydraulic power pack. This pressurizes fluid to 21 MPa (3,000psi), which in turn fills the intensifier’s reservoir. The fluid in the reservoir can then be brought up to the required pressure by the intensifier e.g.140MPa or 210 MPa.
A double-pump or a dual piston intensifier with two servo-valves is available as an option for pressure or volume control when continuous flow is required.
Front Panel Geography
Diagram of valve schematic、Fluid level indicator、Pressure indicator、Manual valves (pressure on/off, and flushing valve or pressure supply/outlet as option)
And optionally on request can have: • Start/stop button • Visible electronic temperature indicator • Emergency shut down button
Pore Pressure System
The pore pressure units are used to saturate jacketed specimens, pressurize andcontrol pore fluid in the specimen and are used for permeability tests.
Our high precision syringe pumps for these applications although the pressure intensifiers which are similar to units for cell pressure are useful for this purpose.
Fluid pressurized by the pumps ore pressure intensifier is applied to one or both ends of the specimen. Operators can perform drained and undrained tests, and the displacement transducer allows calculation of the pore fluid flow rate.
Permeability Tests
The permeability test measurement is done by one or a combination of two pumps which are used to measure sample permeability by applying different pressures at each end of the sample, then measuring the pressure decay of the two ends over time. A set of end caps for permeability tests are available for each specimen diameter.
Hydraulic Fracture Test
All of our Rock Triaxial cells are able to perform hydraulic fracture test on intact specimens in combination with a High-pressure Syringe pump or High-pressure intensifier and relevant components which are used to apply constant high-pressure fluid on hollowed sample. The dedicated software module would be integrated to main software for controlling the test. Please note that each specimen diameter requires dedicated components manufactured for the same size.
Ultrasonic Wave Maeasuring System
This is a complete system and is comprised of all required electrical and mechanical hardware e.g. signal conditioner and pulse generator, ultrasonic velocity and data acquisition controller, ultrasonic platens including combined P and S (OptionalS1 & S2) transducers as well as the required software. This package conducts ultrasonic velocity measurement tests on rock samples. The test is applicable at temperatures of 200°Cand pressures of up to 210 MPa.