Customized Piston Type Seismic Resistant Viscous Fluid Damper for Building or Bridges

Product Description

Product Description

– Vibration Control Devices for Buildings, Bridges & Mechanical Equipment
    , also referred to as earthquake dampers, seismic dampers, or fluid viscous dampers, are energy dissipation devices commonly used for structural vibration control. Through the reciprocating motion of an internal piston, they generate shear action within the damping medium, thereby absorbing and dissipating vibration energy caused by earthquakes, wind loads, or mechanical operations. They are widely applied in buildings, bridges, and industrial equipment. The fluid viscous damper, as a type of viscous damper, is distinguished by its use of high-performance liquid as the damping medium. It achieves more efficient energy dissipation through precisely engineered fluid channels and orifice structures.

Viscous damper with bellows-protected piston rod

Viscous damper with structural sleeve-protected piston rod

Structural Composition

   A consists of a spherical bearing rod, hydraulic oil chamber, damping orifice, guide rod, piston, cylinder, sealing ring, and other components.

Working Principle

The viscous damper is filled with a viscous fluid (e.g. silicone oil) and is equipped with a piston structure. When a structure experiences relative displacement due to external forces (such as earthquake or wind load), the connecting components at both ends of the damper move relative to each other, causing the piston to move within the cylinder. As the viscous fluid passes through small orifices or gaps in the piston, a damping force is generated, converting the structure's kinetic energy into heat and dissipating it.

Features

*High energy dissipation. It dissipates large amounts of vibration energy, providing significant vibration reduction.
*Velocity-dependent. The damping force is related to the piston velocity and is insensitive to minor vibrations.
*Durable and reliable. Excellent sealing performance and a long service life (typically over 30 years).
*Simple maintenance. No external power required and virtually maintenance-free.
*Temperature stability. Specially formulated fluid ensures stable performance across a wide temperature range.

Specification

Number	Rated load	Pin d(mm)	Outer diamete D(mm)	Stroke  S(mm)	Pin-pin distance L(mm)	Damping coefficient  (KN.(s/mm)a)	Design speed (mm/s)
1	30	20	60	100-800	Customized design  according to customer  installation requirements.	1-1000	100-1000
2	60	25	86
3	100	35	102
4	160	40	127
5	250	50	152
6	400	60	194
7	650	80	245
8	1000	100	325
9	1800	140	402
10	2400	160	450
11	3000	180	500
12	3500	200	554
13	4000	220	610

Installation

Application

*Bridge structures: Used at bridge pier tops, beam ends, and similar locations, viscous dampers mitigate vibrations caused by earthquakes or wind loads.
*High-rise buildings: Used in combination with shear walls and frame structures, viscous dampers significantly reduce inter-story displacement and structural acceleration induced by earthquakes.
*Industrial plants and equipment foundations: Installed on the foundations of large-scale machinery, viscous dampers mitigate the impact of operational vibrations on building structures.

Packaging & Shipping

FAQ

1.When can I get the quotation?
A:We usually quote within 24 hours after we get your inquiry.

2.How long can I expect to get the sample?
A:The samples will be ready for delivery in 5-10days. The samples will be sent to you via express and arrive in 5-7days.

3.How long is the delivery time
A:Usually 10-15 days, depending on the quantity purchased.

4.How can I get a sample to check your quality?
A:After negotiating the price, we will provide you with samples for testing.

5.what can you buy from us?
Bridge Bearing Pad,Seismic isolation bearing,Expansion Joint,Rubber Inflatable Airbag,Waterstop Belt/Strip,Steel Expansion Joint,Butyl Tape

6.What's payment term?
A:T/T, L/C at sight, Western Union

7. Do we have quality guarantee?
Of Course!.
--from raw material to manufacturing, we have rigid quality control.
--before delivery, we have strict quality inspection.
--Third party inspection is also available at your request.
--We also have ISO, CE certificates.