High integrity piston and rod gland seals are specified to meet the high-usage, long-life demands of all aircraft actuators. These can be designed for a variety of configurations up to and above 5000 psi. Based on vast experience in this field, Trelleborg Sealing Solutions can also assist with actuator design by recommending component tolerances, surface finishes and coatings, and seal groove geometries.
Trelleborg Sealing Solutions has a long history of aerospace polymer seal performance and an unmatched reputation. The most advanced polymer materials and seal designs allow our engineers the freedom and flexibility to meet all design and operational challenges. Within the hydraulics & actuations systems on aircraft this is very evident, with seal systems capable of meeting application challenges. Whether the application is door or access actuators, extension, retraction, locking or articulating actuators, Trelleborg Sealing Solutions is your performance, value and technology company.
Auxiliary Power Units generate power for airborne systems such as electronics, air conditioning, hydraulics, avionics, pressurization and engine starting. Reliability and long service life are important factors in determining the proper sealing solution. Trelleborg Sealing Solutions has the expertise to guide you through the sealing system design process and ensure your auxiliary power units perform consistently.
As devices which impart mechanical motion over a restricted linear or rotary range and with intermittent duty or duty cycle (e.g. door, ramp, retract/lock actuator), auxiliary actuators and utility actuators require reliable seals that perform consistently throughout their life cycle
Couplings, or couplers, provide the mechanical connection between the flight control system and other onboard systems, such as the instrument landing system or terrain following radar. Trelleborg Sealing Solutions understands the important aspects of proper coupling operation and is ready to help you evaluate your project and design the best solution for your needs.
Power Transmission Units transmit power between hydraulic systems. A key function is controlling the fluid contained in each system, and a proper sealing system is essential for long, reliable service. Trelleborg Sealing Solutions has the experience required to help you evaluate your power transmission unit needs and design the ideal solution to fit all aspects of your project.
All airborne hydraulic systems include a pump or motor for the generation or use of hydraulic pressure. These systems feed the primary and auxiliary acutation systems on board and are considered critical for safe and proper flight performance.
Typical Operating Environment
Pumps typically experience sustained pressures of less than 3.4 MPa / 500 psi, while possible spikes to 10 MPa / 1,500 psi can be expected. Motors will experience operating pressures of 3,000 psi and beyond. Temperatures range from approximately -54°C / -65°F to +121°C / +250ºF.
Sealing solutions for servovalves demand particular attention to the details of ideal system performance. Proper fluid control is essential so that demand is cancelled when the desired output, or valve position, is achieved. Proper sealing is a key ingredient to ensure the servomechanism responds accordingly.