I. Main types and structures of Atlas Copco air compressor motor shock absorbers
Based on the installation method and shock absorption principle, the common motor shock absorbers include the following types:
Rubber shock absorber
Structure: With natural rubber or nitrile rubber as the core, a metal frame is embedded (for fixation and strength enhancement), and the outside is wrapped with a rubber layer. The rubber's elastic deformation absorbs vibrations.
Features: Low cost, easy installation, suitable for medium and low load (usually 100-500 kg) and low-frequency vibration scenarios, with moderate oil and temperature resistance (-20°C to 80°C).
Common forms: Circular shock absorber pads, square shock absorber blocks, and shock absorbers with bolts (for easy connection to the motor base and equipment frame).
Spring shock absorber
Structure: Composed of a spiral spring, upper and lower metal trays, and rubber damping pads. The spring is responsible for main shock absorption, and the rubber pads assist in buffering and reducing resonance.
Features: Strong bearing capacity (can withstand loads of 500 kg or more), resistant to high and low temperatures (-40°C to 150°C), long lifespan, suitable for high-power motors (such as 55 kW air compressors) or high-frequency vibration scenarios.
Advantages: Adjustable spring stiffness to match different loads, with shock absorption efficiency of over 90%.
Air spring shock absorber
Structure: Composed of an air bladder, upper and lower cover plates, and inflation valve. It forms an elastic support by inflating compressed air, using the compressibility of gas to absorb vibrations.
Features: Excellent shock absorption effect (vibration transmission rate of less than 5%), adjustable air pressure to adapt to different loads, suitable for precision equipment or large motors with extremely high vibration requirements.
Limitations: High cost, requires air source and pressure control system, relatively complex maintenance.
II. Core parameters and selection basis of Atlas Copco air compressor motor shock absorbers
Rated load: Select based on the total weight of the motor (including accessories), leaving 10%-20% margin for the bearing capacity of each shock absorber to avoid overload failure.
Natural frequency: Need to be offset from the motor operating frequency (generally, the natural frequency should be less than 1/2 of the motor operating frequency) to prevent resonance amplification of vibrations.
Installation dimensions: Match the installation hole spacing and bolt specifications of the motor base to ensure firm fixation (common installation methods: bolt-fixed type, adhesive type, embedded type).
Environmental adaptability: Select water-resistant rubber for humid environments, oil-resistant nitrile rubber for oil-contaminated environments, and spring or silicone materials for high-temperature environments.
III. Installation and maintenance key points of Atlas Copco air compressor motor shock absorbers
Installation requirements:
The shock absorbers should be evenly distributed at the four corners of the motor base (or symmetrical positions) to ensure balanced force;
The contact surfaces with the motor base and frame need to be flat to avoid excessive force on one side due to inclination;
The fixing bolts need to be equipped with anti-loosening washers to prevent vibration from causing loosening.
Maintenance matters:
Regular inspection (suggested every 3-6 months): Check if the rubber shock absorber has cracks, hardening, or deformation; if the spring is rusted or broken; if the connection parts are loose.
Replacement cycle: The rubber shock absorber generally has a lifespan of 3-5 years (shortened in harsh environments); the spring shock absorber can be used for 8-10 years, and rusted parts need to be descaled or replaced in time.
Abnormal handling: If the vibration of the equipment significantly increases or the noise is abnormal, check if the shock absorber is Failure； if necessary， replace the entire unit (to avoid uneven force caused by mixing new and old parts).
