Spring shock absorber damping Huaneng pipeline equipment of a composite shock absorbers

With the rapid development of industrial society, the environment is increasingly recognized by the international community are key issues affecting sustainable development in the 21st century, and the noise pollution and control problems is to become one of the most important environmental issue of the 21st century to overcome. From the 1970s to date, spring-damper noise control technology matures, In addition to this world there muffler noise reduction equipment, sound absorption, sound insulation, vibration damping noise control equipment. Spring-damper mainly in the sound source, noise transmission and receiver aspects of vibration control and reduce noise and vibration. Noise control can be carried out, both the most active and effective and reasonable measures from the noise source and vibration source side, trying to force this is also the industrial production has been noise control. Spring-damper noise reduction technology since 1947, first proposed the United States of HF Olson, it has aroused widespread interest around the world. In 1953, Olson and others have also proposed a "shock absorber damping spring", practical and pay. 20 1960s and 1970s, Britain and France, the former Soviet Union and other countries of the single active silencer extended to multi-channel sound system and a combination of a secondary source, and successfully applied to the pipe muffler. In 1980, France will have a microprocessor adjustable spring shock absorber damping device used in laboratories diesel in the range of 250 Hz to reduce noise 20dB. United States, France, Northern Europe, Eastern Europe and other countries are very particular about the city noise processing, these countries often use spring-damper device, pipelines and other industrial areas of life, or the airport to handle the high noise source. In order to reduce traffic noise pollution, countries urban greening, some countries of the noise source traffic ten lines, machinery equipment and other underground, and many countries have committed to install spring-damper on the roads of electrical equipment used installing noise barriers. Attention to prevent noise incoming interior in housing construction in general are mounting the adjustable vibration dampers for sound insulation, sound-absorbing materials development and production are constantly being taken seriously in Europe and America. The vibration and noise of mechanical or plumbing in the work produced is a wave phenomenon. Fluctuations and mechanical vibration pipeline is closely related form of exercise, vibration is the source of fluctuations, the control elastic medium is the key to control the vibration in the morning, spring-damper is effectively comply with vibration, wave to mechanical piping and other equipment, thereby effective control of noise. When the effective control of the first to use mechanical vibration damping spring device control objects made through the equilibrium position reciprocating periodic movement, etc. (such as hand on the drumhead can control the vibration when the drumhead drumming his fingers on the vocal cords can control talk vocal cord vibration, etc.). Damping device is the use of the basic form of the motion of matter, it is an effective machinery and equipment production processing equipment vibration. Machinery, pipe vibration stabilized is made free vibration damper spring. On one level, smooth desktop, place a spring vibration system, one end of the spring is fixed and the other end attached to a mass m of the object, the object is called a transducer. Spring-mass-spring-damper assumed excluding the transducer can only do linear motion along the axis of the spring on the desktop level, without regard to friction and other resistance transducer and mechanical equipment or piping equipment. When the oscillator is no pulling or pushing force in a relatively static state, then the location of the transducer called central position or balanced position to represent. When the vibrator is subjected to a force along the axial direction of the spring, as the tension, the spring will be stretched, resulting in a point on the oscillator equilibrium position of bombs J wins reply force. In the spring of bomb J wins limit, the greater the deformation of the spring, the elastic restoring force increases. According to Hooke's law, elastic restoring force F of the spring stiffnesses. After the removal of the external force, oscillator will be under the elastic restoring force to balance position as the center reciprocate, this is a shock absorber works. Because already set without regard to friction and resistance, vibration damper spring will continue to go on, this is the free spring oscillator stability control process noise.