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Hydraulic applications are challenging for seals. Not only must the hydraulic seals prevent leakage of fluid from the cylinder, but they must also withstand high pressures, extreme temperatures and transverse forces within the application. The function of hydraulic seals goes far beyond preventing fluid leakage.
At Trelleborg Sealing Solutions, we are experts in fluid power sealing. Our engineers partner with customers to design sealing solutions to meet your unique application needs.
Hydraulic cylinders are sealed using a combination of specialized products:
Rotary actuators can be hydraulically, pneumatically or electrically powered and have a range of sizes, powers, and speeds. Rotary seals are critical for keeping oil and grease in the system while excluding dust and other debris from the internal bearings. Static seals prevent ingress of contamination through joints or other locations that are possibly exposed to the environment.
Both motors and pumps use rotation to create fluid flow and/or linear movement. Different types of seals play different roles in the component:
Application example: Axle motors, Axial piston pump on forklift
Valves regulate, direct and control the flow of a fluid through various passageways from areas of higher pressure to lower pressure. There are numerous valve configurations that involve both rotary and linear movement.
The drivetrain of a vehicle comprises the transmission and the axles with the intention of delivering power to the wheels or tracks that will ultimately move the vehicle.
The engine delivers power to drivetrain components thus forming the powertrain of the vehicle. Engines can have a variety of configurations, but most involve rotary seals for keeping oil and grease within the system.
Static seals and custom molded parts are found throughout and provide multiple functions such as preventing contamination ingress or separating fluids. The V-Ring is typically used to prevent contamination from entering the engine components through axial faces.
Application examples: Distributors, Emissions Controls, Idlers
Accumulators are used for storing energy within a hydraulic system via compressed fluid. In many instances, this involves the separation of hydraulic fluid and nitrogen gas thus requiring leak-tight piston seals to ensure fluid separation. Wear rings are used for centralization while static seals keep both the hydraulic fluid and gas contained within the accumulator to prevent energy loss.
Filters are critical components within a hydraulic system as they help remove particulates from the hydraulic fluid, which can keep the system from getting clogged and losing efficiency.