Rotary Damper
Ensure safety and add a premium feel to the product.
What is a Rotary Damper?
A rotary damper is a rotational device to decelerate an objective’s movement, either rotary or linear movment.
Rotary dampers are capable of generating significant resistance or torque, effectively controlling motion in mechanical systems.
How rotary damper works?
Limited Angle Damper(Vane Damper)
Exploded View
Torque Variation in Limited-Angle Damper
Infinite Angle Damper
Exploded View
Consistent Torque in Infinite-Angle Damper
Rotary Damper Structure Feature
Vane Damper
Working Angle:
Continuous Rotary Damper
Working Angle:
Rotary damper selection guide
When selecting a rotary damper for customer, engineer will consider the following key factors:
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Select by torque range or damping time:
Matching the resistance level needed for the application. For example: Washing machine lid soft-close time requested 3-8 second.
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Select by movement :
Once the optimum torque setting is achieved, the rotational damper should be selected according to the operation movement when closing a lid. Like Horitional, Vertical and so on.
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Select by mounting dimensions:
Peir maintain more than 400 models including big high torque damper and small rotary damper. Talk to engineer directly to find the propoer model effectively.
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Select by Material and durability:
As per Peir’s quality standards, rotary dampers are designed with a lifecycle ranging from 30,000 to 50,000 cycles, with variations among different models. In instances where high-torque dampers surpass 3N.m, the casing material comprises zinc alloy to augment durability. Conversely, for lower torque dampers, PBT is the preferred material due to its robustness and strength. In cases where customers stipulate extended lifecycles, interior components may integrate wear-resistant or high-temperature-resistant materials to meet these specifications.
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Select by Features:
If customer has specific requirement on movement, for example the lid can stop at any angle and soft close from final 15° to 0 °, we can customerize with optimization plan.
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Application requirements:
Specific use and environment temperature.
Rotary Damper Torque Factors
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Oil viscosity:
Thicker oil generates more resistance when passing through the damper’s pathways, leading to higher torque values, whereas thinner oil offers less resistance and results in lower torque. This principle enables the adjustment of damping effects by changing the viscosity of the oil to suit specific application needs.
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Clearance between the rotor inside the rotational damper and outer casing:
The space determines how oil flows through it, which in turn affects the damper’s resistance level.
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Size of the damper:
A larger oil chamber allows for more fluid flow control, leading to different torque capabilities.
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Material:
Zinc alloy and steel are commonly used in high torque dampers, but for low torque dampers, plastic (PBT, PA, or POM) can also fulfill the task. Adding glass fiber to plastics also increases the strength of the material.
That is why Engineers designing a damper need to know the application’s working temperature and required torque to tailor the damper’s performance. This ensures the damper provides the right amount of resistance for its specific use, efficiently dissipating kinetic energy as heat.
Common materials used in rotary dampers
Rotary Damper Application