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In 2023, 18.3 GW of new wind energy conversion capacity was installed in Europe; most of them (79%) represent onshore capacities. Most of this energy production is achieved with horizontal axis wind turbines. For this type of turbine, the location of the transmission coupled with an electric generator or a hydraulic group, in the turbine platform, leads to a significant increase in the mass of the platform, and implicitly in the mass of the pillar that supports the turbine. In addition, turbine maintenance becomes...

In the exploration and mining industry, fixed and mobile machines use hydraulic drive systems (HDSs) involving hydraulic cylinders powered at high pressure rates. Such cylinders operate in heavy and high-magnitude dynamic load regimes, e.g., as part of mobile crusher buckets, excavators and mini excavators, hook-lift trailers, or mobile hydraulic jacks. In this context, there are two solutions for generating high pressure rates in HDSs: (1) by using high-pressure pumps, or (2) by using hydraulic power units consis...

The article presents a solution for solving the problems of eco-efficient combustion of pelletized or chopped and dried agricultural and forest residual biomass, using the TopLit UpDraft (TLUD) gasification process. By using this solution, thermal energy is produced, and about 10-20% residual charcoal, not transformed into gas, called biochar, too. Biochar is a good amendment for agricultural soils and reduces the concentration of CO2 in the environment by capturing carbon in the soil for long periods. Biochar act...

Conveyance of goods and travelling of persons through the tunnels of mines or subway is done on railways of narrow or normal gauge. In interventions in case of accidents, hydraulically operated installations with small dimensions are used for lifting and rerailing the derailed rolling stock. They include hydraulic jacks (double or single acting hydraulic cylinders), supplied with low flow rates at high pressures. Feeding of hydraulic cylinders for lifting and relocating the derailed rolling stock is usually done b...

In the current context, in which the analysis of the failures by infrared thermography for the hydraulically operated machines is an increasingly widespread internationally method, starting from the year 2016, in Romania, at INOE 2000 - IHP Bucharest the first thermographic analyzes were laid made on hydraulic equipment. It is known that by maintaining normal limits of variation of the temperature and viscosity of the hydraulic oil in the actuation plants, are created the conditions of the productivity increase an...

Hydrostatic transmissions create compliance between rigid functional parameters of a power-machine, e.g. an electric motor, and flexible functional parameters of the work machine, e.g. a crane hoist. Hydrostatic transmissions equip fixed or mobile machinery and guidance systems for: aviation, artillery, wind turbines, hydraulic turbine blades, etc. Any hydrostatic transmission includes at least two positive displacement machines: a pump, called transmission пїЅprimaryпїЅ and a motor, called transmission пїЅseconda...