- Overview
- Product Description
- Product Parameters
- Detailed Photos
- Company Profile
Basic Info.
Model NO.
VD441E
Standard
International
Type
Bearing
Material
Stainless Steel
Load Range
Optional
Natural Frequency
optional
Size
Optional
Product capacity
500000pcs/Months
Transport Package
Carton
Specification
Optional
Trademark
THERMOTEST
Origin
China
Product Description
Viscoelastic dampers eff ectively reduce vibrations by converting kinetic energy into heat, thereby damping the movement of the system. Their design allows them to be used over a wide range of frequencies, however, the required type of viscoelastic damper depends on the planned application. The application range extends from process technology to the damping of individual machines or complete piping systems. Ambient temperatures from -30 °C to +110 °C as well as the most demanding environmental conditions (e.g. chemicals, dust- or salt-polluted atmospheres) do not present an obstacle.
The viscoelastic dampers and damping parameters are tested and monitored by our in-house test lab and independent test laboratories based on Safety Standard KTA 3205.3 issued by the Nuclear Safety Standards Commission (KTA).
Design
Viscoelastic dampers consist of a metal housing fi lled with a highly viscous medium. A piston connected to the upper connection plate can move freely in all directions within the medium. Either the upper or lower connection plate of the damper can be connected to the vibrating system, while the other plate is mounted on a fi xed abutment. Dampers cannot bear static loads. The dampers are protected against corrosion as standard according to ISO 12944 C3 (M). Tailor-made solutions can be provided to meet special customer requirements.
Key parameters required to defi ne a damping solution are as follows:
· operating temperatures [°C], i.e. the lowest and highest expected temperature of the vibrating system and the environment
· resonance frequencies [Hz] of the vibrating system
· amplitude [mm] of the vibrating system
· mass [kg] of the vibrating system between two fi xed points
· cold / hot displacement
Not all details are required. VICODA is pleased to provide support when selecting viscoelastic dampers.
Other services provided by VICODA include vibration measurements or simulations to get to the root cause of vibrations.
· operating temperatures [°C], i.e. the lowest and highest expected temperature of the vibrating system and the environment
· resonance frequencies [Hz] of the vibrating system
· amplitude [mm] of the vibrating system
· mass [kg] of the vibrating system between two fi xed points
· cold / hot displacement
Not all details are required. VICODA is pleased to provide support when selecting viscoelastic dampers.
Other services provided by VICODA include vibration measurements or simulations to get to the root cause of vibrations.
Dimensions
| VD 441E: nominal load, dimensions, weight | |||||||
| Type | Nominal load kN | E mm | B mm | C mm | s mm | d mm | Weight ca. kg |
| VD005441E | 0.3 | 240 | 175 | 125 | 8 | 14 | 9 |
| VD015441E | 2.5 | 240 | 195 | 145 | 8 | 14 | 11 |
| VD025441E | 5 | 240 | 210 | 160 | 8 | 14 | 14 |
| VD045441E | 10 | 240 | 260 | 200 | 10 | 18 | 23 |
| VD085441E | 20 | 280 | 315 | 245 | 12 | 22 | 42 |
| VD140441E | 30 | 320 | 375 | 290 | 15 | 26 | 70 |
| VD160441E | 40 | 335 | 400 | 310 | 18 | 26 | 90 |
| VD185441E | 60 | 350 | 435 | 330 | 20 | 33 | 103 |
| VD225441E | 80 | 390 | 490 | 365 | 25 | 39 | 165 |
| VD340441E | 100 | 405 | 510 | 395 | 30 | 39 | 203 |
| VD 441E: vertical damping parameters [kNs/m] | ||||||||
| Type | Nominal load kN | 5 Hz | 10 Hz | 15 Hz | 20 Hz | 25 Hz | 30 Hz | 35 Hz |
| VD005441E | 0.3 | 6,2 | 4,7 | 4,0 | 3,6 | 3,3 | 3,0 | 2,9 |
| VD015441E | 2.5 | 15,7 | 12,0 | 10,2 | 9,1 | 8,3 | 7,7 | 7,3 |
| VD025441E | 5 | 27,8 | 21,1 | 18,0 | 16,0 | 14,7 | 13,7 | 12,9 |
| VD045441E | 10 | 47,3 | 36,0 | 30,7 | 27,4 | 25,0 | 23,3 | 21,9 |
| VD085441E | 20 | 89,3 | 67,9 | 57,9 | 51,6 | 47,3 | 44,0 | 41,4 |
| VD140441E | 30 | 143,9 | 109,4 | 93,2 | 83,2 | 76,2 | 70,9 | 66,7 |
| VD160441E | 40 | 162,7 | 123,7 | 105,4 | 94,1 | 86,1 | 80,1 | 75,4 |
| VD185441E | 60 | 189,4 | 144,0 | 122,7 | 109,5 | 100,3 | 93,3 | 87,8 |
| VD225441E | 80 | 229,9 | 174,8 | 148,9 | 132,9 | 121,7 | 113,2 | 106,5 |
| VD340441E | 100 | 340,2 | 258,7 | 220,4 | 196,7 | 180,1 | 167,6 | 157,7 |
| VD 441E: Horizontal damping parameters [kNs/m] | ||||||||
| Type | Nominal load kN | 5 Hz | 10 Hz | 15 Hz | 20 Hz | 25 Hz | 30 Hz | 35 Hz |
| VD005441E | 0.3 | 5,9 | 4,5 | 3,6 | 3,0 | 2,5 | 2,2 | 2,1 |
| VD015441E | 2.5 | 14,0 | 10,8 | 8,6 | 7,0 | 6,0 | 5,4 | 5,1 |
| VD025441E | 5 | 23,7 | 18,3 | 14,6 | 12,0 | 10,2 | 9,1 | 8,6 |
| VD045441E | 10 | 37,4 | 28,8 | 22,9 | 18,9 | 16,1 | 14,4 | 13,6 |
| VD085441E | 20 | 94,0 | 72,5 | 57,8 | 47,5 | 40,6 | 36,3 | 34,2 |
| VD140441E | 30 | 148,7 | 114,5 | 91,3 | 75,1 | 64,2 | 57,4 | 54,1 |
| VD160441E | 40 | 229,9 | 177,1 | 141,2 | 116,2 | 99,2 | 88,7 | 83,6 |
| VD185441E | 60 | 293,0 | 225,8 | 180,0 | 148,1 | 126,5 | 113,1 | 106,6 |
| VD225441E | 80 | 367,3 | 283,0 | 225,6 | 185,6 | 158,5 | 141,8 | 133,7 |
| VD340441E | 100 | 554,1 | 427,0 | 340,4 | 280,0 | 239,2 | 214,0 | 201,7 |
| STEP-BY-STEP INSTALLATION OF DAMPER TYPES VD, VM AND VI (QUICK START GUIDE) | ||
| Procedures | Description | |
 | 1. Delivery condition | Viscoelastic dampers can be delivered preset to 'cold position' (off set position). This is guaranteed by transport locks securing the off set between the upper and lower part of the damper. Unless ordered diff erently, the dampers are delivered using the locking position (off set position x = 0; y = 0; z = 0}. |
| 2. Installation | The upper and lower connection plates are frictionally connected to the piping system and steel construction. All transportation locks must be removed subsequently. | |
| 3. Startup | During startup, the relative position of each the upper and lower connection plate changes to the pre-calculated hot load position. The damper should then operate approximately in mid-position. | |
