Linear Dampers

A linear damper is a device that creates damping effects through the compression of hydraulic oil and flow through orifices. It is commonly used for buffering and decelerating various movements, converting kinetic energy into thermal energy for smooth motion control.

When an object impacts the piston rod, the force is transferred to the piston, which compresses the hydraulic oil. The oil flows through specially designed orifices, creating resistance that achieves deceleration and buffering effects. The damping effect varies depending on hydraulic pressure, orifice design, oil viscosity, and impact speed.

The main components include: piston and piston rod (transferring external force to hydraulic oil), hydraulic oil (medium for creating resistance), and orifices (controlling oil flow rate and determining damping effect).

Based on orifice design, they can be categorized into single-orifice type (providing constant damping force) and multi-orifice type (providing variable damping force). Based on force output direction, they can be push-in type, pull-out type, or two-way dampers.

Linear dampers typically use high-quality materials for durability and reliability: POM (Polyoxymethylene) for head and shell components, SUS304/SUS201 stainless steel for piston rods, and silicone oil as the hydraulic medium. Some models also feature aluminum alloy or stainless iron construction for specific applications.

The service life varies by model. Most industrial linear dampers are rated for 50,000 to 100,000 life cycles. Premium models like PR-L202 and PR-L208 offer 100,000 cycles, while standard models typically provide 50,000 cycles. Some models, such as the JP-CA series, are designed for up to 15 years of service life under normal operating conditions.

Key factors to consider include: operating temperature range (typically 20°C to 60°C, with some models handling up to 120°C), stroke length (ranging from 10mm to 100mm depending on model), force requirements (from 7N up to 1200N), installation space (diameter ranging from Φ7.2mm to Φ12mm), and environmental conditions that may affect the damper's performance and durability.