What Makes the WH Type Rubber Vibration Isolator Effective?

The WH Type Rubber Vibration Isolator is an industrial anti-vibration mount designed to reduce mechanical vibration transmission, minimize structure-borne noise, and provide stable support for rotating and reciprocating machinery. Its rubber-metal construction combines elastic deformation with material damping, helping protect equipment foundations, connecting components, and surrounding structures from excessive vibration.

The isolator features a molded rubber body, an integrated metal mounting plate, and a central threaded metal insert. The rectangular baseplate includes four mounting holes for secure attachment to equipment foundations. Its hollow rubber structure allows controlled deformation under load while providing vibration isolation in demanding industrial applications.

Unlike rigid machinery mounts, the WH rubber vibration isolator introduces flexibility between the equipment and its supporting structure. This flexibility reduces the dynamic forces transmitted to the foundation when the isolator is properly selected for the operating conditions.

Key Technical Features

• Low Natural Frequency: The WH series has a specified natural frequency of 6 ± 1 Hz under rated operating conditions, supporting effective isolation from suitable higher-frequency excitation.

• Controlled Static Deflection: A rated static deflection of 12 ± 2 mm provides the elastic movement required for vibration isolation.

• Rubber Damping Performance: A damping ratio greater than 0.07 helps control vibration response near resonance.

• Integrated Metal Construction: The metal mounting components provide secure attachment and load transfer.

• Multiple Load Capacities: Available models have rated loads ranging from 100 to 450 daN.

• Compact Installation: The rectangular mounting base supports installation in industrial machinery frames and foundations.

Rubber compound selection is important for long-term reliability. Natural rubber (NR) may be considered for applications requiring good elasticity and fatigue resistance, while nitrile rubber (NBR) may be suitable where oil resistance is necessary. The actual rubber formulation should be confirmed according to operating temperature, environmental exposure, and equipment requirements.

WH Rubber Vibration Isolator Technical Specifications

These specifications represent the supplied WH series data. Actual performance depends on the selected model, operating load, installation conditions, and excitation frequency.

Where Are WH Rubber Vibration Isolators Used?

WH rubber vibration isolators are suitable for industrial machinery requiring stable support and reduced vibration transmission. They are particularly useful in applications involving rotating equipment, reciprocating mechanical forces, and continuous operation.

Diesel Engines and Generator Sets

Diesel engines generate periodic excitation from combustion forces, rotating components, and reciprocating piston movement. WH rubber anti-vibration mounts can be considered for industrial diesel generator sets, stationary diesel engines, and auxiliary power units.

Properly selected mounts help reduce vibration transmitted from the engine frame to the supporting foundation. Engineers should evaluate engine operating speed, starting and stopping conditions, equipment center of gravity, and dynamic loading before selecting the appropriate model.

Industrial Pumps and Air Compressors

WH vibration isolation mounts can be used with centrifugal water pumps, industrial circulation pumps, cooling-water pump assemblies, and selected reciprocating air compressors.

For pump installations, effective vibration isolation can help reduce structure-borne noise and vibration transmitted through supporting frames. Flexible pipe connections may also be required to prevent rigid piping from bypassing the isolation system.

For reciprocating compressors, additional consideration should be given to pulsating forces, operating speed, and dynamic displacement.

Industrial Fans and Mechanical Equipment

Potential applications include centrifugal ventilation fans, industrial exhaust blowers, motor-driven machinery, and selected industrial processing equipment.

In fan applications, the isolator helps reduce vibration caused by rotor imbalance and mechanical excitation. However, mount selection must consider operating frequency, fan arrangement, motor weight, and the distribution of loads across mounting points.

For machinery with significant startup torque or lateral forces, the complete mounting arrangement should also be evaluated for stability and displacement control.

Frequently Asked Questions

1. How do I select the correct WH rubber vibration isolator for my equipment?

Selection begins by calculating the static load supported by each mounting point. Divide the total equipment weight among the isolators, taking account of the center of gravity and any uneven load distribution.

Next, determine the equipment operating frequency, required isolation efficiency, available installation space, and environmental conditions. The selected isolator should operate within its rated load range and provide sufficient static deflection without exceeding allowable movement limits. For equipment with significant dynamic forces, a more detailed vibration analysis is recommended.

2. What rubber materials are suitable for WH vibration isolators?

Rubber material selection depends on the operating environment and the mechanical properties required. Natural rubber generally offers good elasticity, resilience, and fatigue resistance, making it suitable for many vibration isolation applications.

Nitrile rubber may be considered when exposure to mineral oils or lubricants is expected. EPDM can be appropriate for applications involving weathering, ozone, or certain outdoor environments.

However, these materials are not automatically interchangeable. Their stiffness, damping characteristics, temperature limits, and chemical compatibility differ. Material availability and final performance must be confirmed before manufacturing.

3. What is the maximum load capacity of the WH rubber vibration isolator?

The supplied WH series specifications cover rated loads from 100 daN to 450 daN, depending on the model. For example, the WH-150 has a rated load of 150 daN, while the WH-400B is rated at 450 daN.

One decanewton equals 10 newtons, so a 450 daN rating corresponds to approximately 4,500 N of force.

These values represent rated working loads, not ultimate failure loads. Engineers should also consider dynamic loading, uneven weight distribution, operating conditions, and any required safety margins.

4. How should WH rubber vibration isolators be installed?

WH rubber vibration isolators should be installed on stable, level supporting surfaces with mounting hardware compatible with the specified hole dimensions. The WH series uses a rectangular baseplate with four mounting holes and a central threaded connection.

Before installation, verify the mounting positions, equipment weight distribution, and available clearance for rubber deformation.

Avoid forcing the isolators into alignment or introducing unintended preload. Mounting bolts should be tightened according to the approved installation requirements. After installation, inspect the equipment level, static deflection, and operating vibration response.

5. Can WH rubber vibration isolators be used for diesel generators and marine equipment?

WH rubber vibration isolators may be considered for stationary diesel generators, auxiliary engines, and selected marine machinery when their load capacity, natural frequency, and displacement characteristics match the application.

Marine installations require additional evaluation of vessel motion, equipment acceleration, corrosion exposure, and possible shock loads. Certain installations may also require mechanical restraints or application-specific approvals.

For diesel generator sets, engineers should evaluate engine excitation frequencies, startup and shutdown behavior, and the mounting system’s response to torque. Product suitability should be confirmed through application-specific calculations rather than equipment type alone.

6. How does the natural frequency affect vibration isolation performance?

Natural frequency is a critical parameter in determining the effectiveness of a vibration isolator. The WH series has a specified natural frequency of 6 ± 1 Hz under rated loading.

For a simplified single-degree-of-freedom system, vibration isolation begins when the excitation frequency exceeds approximately 1.414 times the natural frequency. Greater frequency separation generally improves isolation, although damping and installation conditions also influence the result.

If equipment operates near the isolator’s natural frequency, resonance may increase vibration amplitude. Therefore, engineers should evaluate the operating speed range, startup conditions, and expected excitation frequencies.

7. Can WH rubber vibration isolators be customized for special machinery?

Customization may be considered when standard WH models do not meet the equipment’s installation or operating requirements. Potential modifications include rubber compound selection, mounting dimensions, threaded connections, metal surface treatments, and load characteristics.

However, changing the rubber geometry, hardness, or material formulation can significantly affect stiffness, natural frequency, damping, and service life.

For technical evaluation, customers should provide equipment weight, mounting-point arrangement, installation drawings, operating speed, environmental conditions, and required vibration isolation performance. Custom designs should be verified through appropriate engineering calculations and testing before production.

Conclusion

The WH Type Rubber Vibration Isolator provides a practical solution for reducing vibration transmission in diesel engines, industrial pumps, compressors, ventilation fans, and other mechanical equipment.

With multiple load capacities, a compact rubber-metal structure, and defined vibration isolation characteristics, the WH series can support reliable machinery installation when properly selected.

For product selection, technical drawings, or quotations, please provide your equipment weight, dimensions, installation drawings, operating conditions, and specific technical requirements.

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