Attenuation of Transmission of Vibrations and Ground-Borne Noise by Means of Steel Spring Supported Low-Tuned Floating Trackbeds In congested areas, the close vicinity of rail tracks to buildings, structures and people or sensitive facilities often leads to conflict in respect of the transmission of vibrations. Reviewing various vibration attenuation measures, this whitepaper illustrates different floating trackbed systems and describes their main characteristics and design aspects. It also explains the construction features as well as the installation of the elastic interfaces. Various aspects of floating trackbed systems such as slab length, floating trackbeds on steel springs, steel spring elements for floating trackbeds are covered. Examples of floating trackbeds on steel springs which include trough-type floating trackbed, and slab-type floating trackbed, slab-type floating trackbed above ground are included. Providing the measurements performed inside the Cologne tunnel on top of the floating slabs as well as on the tunnel walls, the report concludes that with well designed low-tuned floating trackbeds, high vibration attenuation levels can be reliably achieved and those supported on steel springs, long slabs, or troughs provide advantages in terms of construction, installation and performance.
Factors to Consider When Attempting to Bring Full Revolution Clutch Mechanical Power Presses into Compliance with OSHA 1910.217 Standards Safeguarding is more of a challenge with full revolution clutch presses than with air clutch presses, and their compliance cost often exceeds their original/replacement cost. Important factors to be considered when planning to bring full revolution clutch mechanical power presses into compliance with OSHA 1910.217 standards are presented in this paper. The OSHA standard requirements for full revolution clutch presses are highlighted, along with a table that lists the distances at which guards must be positioned from the danger line in accordance with regulations. The various alternatives for fixed barrier guards for hand fed presses such as 2 hand trip, Type A sliding barrier device, pullouts or restraints are illustrated, and their uses are explained. The document also focuses on the cost effectiveness and the advantages of hydraulic presses, air over oil hydraulic presses, and pneumatic presses.
Linear actuators can be powered by pneumatics, hydraulics, or electric motors. Which is best for your job? Linear actuation is employed everywhere, for packaging, life sciences, transportation, and factory automation jobs. Pneumatic and hydraulic linear actuators operate on pressure differentials; electromechanical actuators are either linear motors or rotary motors driving a screw or belt. The selection and use of these technologies is greatly influenced by the user's technical knowledge, the project's budget, energy sources, and performance tradeoffs.
This hydraulic cylinder features tie-rod construction for extended life under high working pressures, and pressure-energized For example, pneumatic actuators don't deliver body seals to prevent leaks.
For example, pneumatic actuators don't deliver high force output, but are well suited when a cost-effective, easy start-up solution is required. Hydraulic linear actuators generate a lot of noise and can leak nasty fluid, but are ideal for high force applications that require precise control. Electromechanical actuators have high energy requirements and are more difficult to install and maintain, but are preferred for complex, multi-axis, motion control applications.