Open Access – Statement
Scientific and professional articles in the journal Ventil are published in open access under the CC-BY-4.0 license. Authors are not charged for publishing the article.
Preventing Lubrication Problems and Failures
Effective lubrication is one of the key prerequisites for the reliable operation and long service life of industrial machinery and equipment. Despite significant advances in lubricants, lubrication systems, and condition monitoring techniques, lubrication-related failures remain a major cause of damage to bearings, gearboxes, and hydraulic systems.
Tribological and functional limitations of universal engine oils in hydraulic systems
Universal motor oil can also function satisfactorily as hydraulic oil. However, if universal motor oil is used as hydraulic oil solely because of its high viscosity index (VI) – that is, because of its stable kinematic viscosity regardless of temperature changes – then this is not the right solution. This is, of course, related to the additives that increase the viscosity index.
New approaches, technologies and trends in production pneumatic systems and processes
The development of miniature 3D-printed and soft pneumatic actuators enables lightweight, flexible and safe solutions for use in robotics and biomedical applications. Proportional and digital pneumatics are further developing towards Industry 4.0, with reinforcement learning methods improving the adaptability of control systems.
A Multi-Criteria Design Methodology for Hydraulic Valves Manufactured by Additive Manufacturing
A design workflow for a hydraulic valve manufactured using metal additive technologies is presented. The method combines parametric modelling, CFD analysis, topology optimisation and multi-criteria evaluation. Fifteen control spool bore positions of an NG10 valve were assessed according to pressure drop, …
Monograde or Multigrade Hydraulic Oils?
In this article on the maintenance of hydraulic equipment, we will discuss the difference between monograde and multigrade hydraulic oils. Hydraulic oil differs from all other lubricants because it must primarily fulfil two main functions: energy transmission and lubrication. In addition, it must prevent foaming, release entrained air bubbles, be thermally, oxidatively …
The importance to consider advanced fluid properties in flow simulation of hydrostatic machines (Part 2)
Hydrostatic machines are devices that transfer power using pressurized hydraulic fluid within a closed circuit, relying on positive displacement pumps and motors. They convert mechanical energy into fluid pressure and back into mechanical torque. Simulation of such machines still requires highly skilled engineers…
From ERP Data to a Feasible Production Plan with a Digital Twin in the GoSoft Environment
In modern manufacturing, competitiveness is no longer determined solely by production quality, but by a company’s ability to manage a complex combination of orders, deadlines, materials, machines, people and other limited resources quickly and reliably. This is precisely where traditional ERP systems often reach their limits…
Collaborative Modular Robotic Educational Cell
Modern industrial manufacturing, characterized by high degree of variability and dynamically changing production demands, encourages the development on flexible, adaptable, and reconfigurable automated machinery. Those industrial trends are reflected directly onto the curriculum of contemporary education programs in the fields of automation and robotics…
Monitoring and prevention of the risk of deposit and varnish formation
Varnish deposits represent one of the key, yet often overlooked, causes of reduced reliability in modern hydraulic and lubrication systems. Their impact does not manifest as sudden failures, but rather as a gradual degradation of performance, which can lead to valve sticking, reduced efficiency of control components, and unplanned equipment downtime…
The importance to consider advanced fluid properties in flow simulation of hydrostatic machines (Part 1)
Hydrostatic machines are devices that transfer power using pressurized hydraulic fluid within a closed circuit, relying on positive displacement pumps and motors. They convert mechanical energy into fluid pressure and back into mechanical torque…
