Spring Shock Absorber for Cooling TowersSpring Shock Absorber for Cooling Towers
Four-directional restrained spring vibration isolators and rubber isolation pads, purpose-designed for noise and vibration reduction in cooling tower equipment. Models LXJ-500 to LXJ-1650, load 500 kg to 1650 kg, deflection 25 mm/50 mm.
The LANXUN range of vibration isolators for cooling towers includes two product lines: four-directional restrained spring isolators and rubber isolation pads. The spring isolators are made of high-grade alloy spring steel, and their four-directional restraint design keeps equipment stable and non-eccentric during operation. With a vibration isolation efficiency of over 95%, they effectively isolate the low-frequency vibration generated by cooling tower fans, motors, and pumps. The rubber isolation pads use high-damping rubber that resists oil and aging, and they are easy to install. The range covers 10 standard models from LXJ-500-A to LXJ-1650-B, with load capacities of 500 kg to 1650 kg and selectable deflections of 25 mm/50 mm. Custom designs are available for specific projects.
Key Highlights
High-Strength Alloy Spring Steel
Made of premium 60Si2Mn alloy spring steel and subjected to strict heat treatment, offering a high elastic limit, minimal permanent deformation, and no performance decay over long-term use.
Durable and Long-Lasting
The spring surface is treated with Dacromet anti-rust coating and passes a salt-spray test of ≥500 h; the rubber pads resist oil and ozone aging, with a design service life of ≥15 years.
Comprehensive Protection
The four-directional restraint structure prevents horizontal displacement and overturning while also providing vertical vibration damping, delivering all-round vibration protection for the cooling tower.
Better Spring Durability
The helical spring has a natural frequency as low as 2.5–3.5 Hz, providing excellent isolation of medium- and low-frequency vibration and outperforming pure rubber damping.
Extremely High Vibration Isolation Efficiency (Above 95%)
The measured vibration transmissibility is ≤5% and the vibration isolation efficiency is ≥95%, effectively reducing the transmission of cooling tower operating noise to the building structure.
Stable, Symmetrical and Non-Eccentric
The four-corner symmetrical layout and restraint frame automatically re-center the unit even if its center of gravity shifts, ensuring stable long-term operation.
Easy Installation
Pre-assembled at the factory, it only needs bolting on site with no welding required; height-adjustment bolts allow precise leveling of the equipment.
Project-Specific Customization
Custom designs are available for actual loads, installation space, and vibration isolation requirements, with support for selection calculations and technical solutions.
Working Principle and Structural Features
The following content is excerpted from the Spring Shock Absorber for Cooling Towers product manual
Working Principle
Drawing on years of accumulated experience, the four-directional restrained spring vibration isolator is a high-strength, corrosion-resistant, highly effective, and stable isolator purpose-designed for cooling towers. It is suitable for noise and vibration reduction in cooling tower equipment, and is available in models LXJ-1000 and LXJ-1650.
The product is assembled from a steel spring, an upper steel plate, a specially bent lower base plate, restraint bolts, and a spring retaining cap. It has a simple structure and a wide load range. Each unit carries a load of 1000 kg to 1650 kg, and its deflection meets the standard 25 mm requirement.
The isolator is simple and flexible to install, with a low height, good stability, a low natural frequency, and significant vibration isolation. During installation it can be placed directly under the equipment; after the equipment is leveled, secure the bolts at the top of the isolator to the equipment, then fix the expansion bolts at the bottom of the isolator to the foundation.
High-Strength Base Frame
The base frame is formed by bending and welding sufficiently thick, high-grade carbon steel plate. After forming, it has an attractive appearance and greatly increased strength, substantially improving the isolator's load capacity.
Hot-Dip Galvanized Corrosion Protection
Thanks to hot-dip galvanizing, the coating can last more than 50 years without repair in suburban environments and 20 years in urban or coastal areas; recesses, sharp corners, and hidden areas are all fully coated with zinc.
Imported Spring Steel Wire
The spring is made from high-strength steel wire imported from Japan and processed through multiple steps including high-frequency quenching, tempering, ED anti-rust treatment, and baking paint, giving it superior mechanical properties and greater durability.
Vibration Isolation Efficiency Above 95%
The spring is designed with a low natural frequency and paired with premium Japanese-imported steel wire, achieving a very high vibration isolation efficiency of over 95%.
Four-Directional Restraint, No Eccentricity
The overall design is compact, small in size, sturdy and durable, and not prone to tilting; the top plate is fixed by four restraint screws, providing central symmetry, even loading, and no eccentricity.
Easy Installation with Leveling
Anchor bolts at the bottom allow the isolator's levelness to be adjusted, reducing the levelness constraints on the on-site concrete foundation and eliminating the time and cost of reworking the foundation.
Technical Specifications
| Model | Rated Load (kg) | Deflection (mm) | Spring Stiffness (kg/mm) | Dimensions L×W×H (mm) | Mounting Hole Spacing (mm) | Net Weight (kg) |
|---|---|---|---|---|---|---|
| LXJ-500-A | 500 | 25 | 20.0 | 200×150×120 | 150×100 | 8.5 |
| LXJ-500-B | 500 | 50 | 10.0 | 220×170×140 | 170×120 | 10.2 |
| LXJ-650-A | 650 | 25 | 26.0 | 210×160×125 | 160×110 | 9.8 |
| LXJ-650-B | 650 | 50 | 13.0 | 230×180×145 | 180×130 | 11.5 |
| LXJ-850-A | 850 | 25 | 34.0 | 220×170×130 | 170×120 | 11.2 |
| LXJ-850-B | 850 | 50 | 17.0 | 240×190×150 | 190×140 | 13.0 |
| LXJ-1050-A | 1050 | 25 | 42.0 | 230×180×135 | 180×130 | 12.8 |
| LXJ-1050-B | 1050 | 50 | 21.0 | 250×200×155 | 200×150 | 14.5 |
| LXJ-1350-A | 1350 | 25 | 54.0 | 240×190×140 | 190×140 | 14.6 |
| LXJ-1650-B | 1650 | 50 | 33.0 | 260×210×160 | 210×160 | 16.8 |
Product Gallery
Images are from the Spring Shock Absorber for Cooling Towers product manual
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