- All
- Product Name
- Product Keyword
- Product Model
- Product Summary
- Product Description
- Multi Field Search
Model: WW21J-12
Product Name: Zinc Alloy Damper
Torque： 1.0-4.0 N , m
Openning Angle: 115*
Closing Angle： -5°
Performance: 115°to 75°fast, 75°to0°slowly
Material： Shaft:Zinc Alloy, House: PBT+GF
Suggestions for damper selection：
A. Free and slow falling of cover plate (rotation axis is directly connected with buffer axis or inner hole, as shown below)
The cover plate starts from less than 90° and falls slowly to 0°. The cover plate acts on the rotation axis
The torque is calculated as follows: T=L/2×M×9.8 (N.m)
L: Cover size (M)
M: Weight of cover (Kg)
The above calculation formula can get the maximum torque generated by the lid's own gravity when the lid is about to be closed. Please use this torque to confirm the final decision required torque. Torque adjustment can be achieved by changing the viscosity of the damping oil. (Note: If the structure is equipped with gears or levers, the selection method of torque is different according to the gear ratio or lever ratio. Assuming that the gear ratio or lever ratio is 1:2, the torque needed for slow falling of the rotating body under the same conditions should also be 2 times.)
B. The rotary damper matches the motion buffer of the spring (as shown in Figure A below, the cover plate rotates open due to the spring force)
The relation curve of spring force F, cover plate load W, and pre-selected damper torque T is shown in FIG. B below
Torque is calculated as follows:
T<F-W
W: Load torque of cover plate
Torque applied to the rotating shaft by a cover plate or other mechanism requiring spring support.
F: Spring output torque
The spring force is sufficient to support the load resistance of the cover plate or other mechanism.
T: damper torque
In order to ensure that the cover plate or other rotating mechanism can rotate smoothly in place, the damper torque T should be slightly less than the difference between the spring output torque and the load torque of the cover plate.
Model: WW21J-12
Product Name: Zinc Alloy Damper
Torque： 1.0-4.0 N , m
Openning Angle: 115*
Closing Angle： -5°
Performance: 115°to 75°fast, 75°to0°slowly
Material： Shaft:Zinc Alloy, House: PBT+GF
Suggestions for damper selection：
A. Free and slow falling of cover plate (rotation axis is directly connected with buffer axis or inner hole, as shown below)
The cover plate starts from less than 90° and falls slowly to 0°. The cover plate acts on the rotation axis
The torque is calculated as follows: T=L/2×M×9.8 (N.m)
L: Cover size (M)
M: Weight of cover (Kg)
The above calculation formula can get the maximum torque generated by the lid's own gravity when the lid is about to be closed. Please use this torque to confirm the final decision required torque. Torque adjustment can be achieved by changing the viscosity of the damping oil. (Note: If the structure is equipped with gears or levers, the selection method of torque is different according to the gear ratio or lever ratio. Assuming that the gear ratio or lever ratio is 1:2, the torque needed for slow falling of the rotating body under the same conditions should also be 2 times.)
B. The rotary damper matches the motion buffer of the spring (as shown in Figure A below, the cover plate rotates open due to the spring force)
The relation curve of spring force F, cover plate load W, and pre-selected damper torque T is shown in FIG. B below
Torque is calculated as follows:
T<F-W
W: Load torque of cover plate
Torque applied to the rotating shaft by a cover plate or other mechanism requiring spring support.
F: Spring output torque
The spring force is sufficient to support the load resistance of the cover plate or other mechanism.
T: damper torque
In order to ensure that the cover plate or other rotating mechanism can rotate smoothly in place, the damper torque T should be slightly less than the difference between the spring output torque and the load torque of the cover plate.
