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MDA Technologies 2/2014

MDA Technologies 2/2014

Product News New

Product News New 210/250cm³ axial piston pump Danfoss launched the 210/250 cm³ pump size to complete the family of axial piston pumps and diagonal axial motors for mobile working machines. With these supplements, the comprehensive offer comprises 14 pumps with conveyor volumes in the range of 45–250 cm³, five inclined-axis motors from 60–250 cm³ and five adjustment versions. With their compact design, these pumps and motors offer best flexibility in the construction of systems under consideration of the applicable provisions for exhaust and functional safety. The good efficiencies in the operation of units balance out low speeds in modern diesel engines. The efficiency of inclined axis motors should be up to 6 % above that of comparable competitor products depending on the operating point. A patented, integrated brake function (ISL) supplements the option range of the axial piston pump. The system permits deceleration of the vehicle without exposing the diesel engine to the risk of overspeed. Seals designed for usage conditions in wind power plants Hydratech Industries, provider of solutions for wind power plants and hydraulic systems, relies on a sealing solution by Freudenberg Sealing Technologies in its new hydraulic piston accumulators for wind power plants. Comparative tests with other products have shown that the new Simko 300 sealing ring has benefits regarding service life, stability of form and sealing properties. The durability of sealing rings in piston accumulators is a decisive parameter for the service life of the overall system. For this reason, piston accumulators are subjected to accelerated load tests in the Hydratech test centre in Sikeborg (Denmark), simulating a usage time of 20 years. Among others, the seals’ conduct under a pressure in excess of 200 bar and temperatures of -40 to +60 °C is measured. www.fst.com Absolute rotating encoder can be integrated into axis bolt The absolute rotating encoder TBX 25 by TWK-Elektronik, Düsseldorf, is a sensor with a shaft resilience up to 1000 N radial and 250 N axial at a housing diameter of 25 mm, and can thus be integrated into axis bolts. The shaft is connected via two M5 bores. A torque support is adjusted customer-specifically. The rotating encoder of stainless steel complies with protection type IP 69K and thus resists extreme environmental conditions. The working temperature range is between -40 °C and +80 °C. The measuring range is 360° with a 12 bit resolution. The rotating encoder works contact-free according to the Hall principle. Due to the redundant setup, the TBA25 has two interfaces as analogue outputs and the TBN25 a CANopen Safety Interface. The latter meets the requirements according to SIL2. Additionally, the TBN25 has the UDS boot loader on CAN. The electrical connection takes place via a PUR cable. www.twk.de www.powersolutions.danfoss.com Independent servo drive The servo drive CLDP (Closed Loop Differential Pump) sets new standards in hydraulics: The independent linear drive offers high overload safety and wear-free operation as compared to the electromechanical spindle. Force and position are controlled easily and precisely. The servo drive also is compact and permits simple system integration. The CLDP servo drive can be used for all direct linear motions, especially when dynamics, reproducibility and reliability are required. Productivity increases by the drive’s speed and longer service life are attractive to plant operators. The servo drive permits forces up to 500 kN and speeds up to 1 m/s. The servo drive is set up simply: The core piece is an integrated servo pump. The motor movement is linked directly to the cylinder movement; speed and rotating direction of the servo motor determine the speed and movement direction of the cylinder. Thus, the different speed and driving profiles can be implemented easily. The independent compact drive works in the closed circuit and only has electronic interfaces; typical elements of hydraulics, such as the unit, valves, pipes and hoses, are not required. The servo drive CLDP combines the benefits of electromechanical spindle drives with those of hydraulics. www.voith.com 48 MDA Technologies 2/2014

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