Broad band damp type vibrating isolation system

Abstract

The invention relates to a broadband damping type vibration isolation system which is formed by connection and composition of an elastic vibration isolator and a particle damper; the particle damper can either be positioned inside the elastic vibration isolator or be positioned between supports or between controlled objects. The broadband damping type vibration isolation system is arranged between the supports and the controlled objects; in the particles, the contact compressive stress caused by the gravity of the controlled objects or imposing pretightening force between the support and the controlled objects, or in this foundation, imposing an electric field or a magnetic field on the particles inside the particle dampers of the broadband damping type vibration isolation system, can cause relative friction movements that occur between the particles at a close contact state in the particle dampers of the broadband damping type vibration isolation system when the controlled objects vibrate corresponding to the support, thereby consuming the vibration energy of the controlled objects within 0.1 to 5000Hz broadband scope and at least at a freedom direction, and resulting in that the controlled objects do not slide or move for vibration.

Description

technical field [0001] The invention relates to a broadband damping type vibration isolation system; especially organically combining the existing elastic vibration isolator and particle damper, utilizing the advantages of high elasticity and large deformation of the existing elastic vibration isolator to make up for the existing There are disadvantages of poor elasticity and limited deformation of particle dampers with high filling rate (greater than or equal to 80%), and the advantages of large damping related to excitation in the broadband range of existing high-filling rate particle dampers are used to make up for existing elastic dampers. A vibration isolation system that has the disadvantage of too small damping of the vibrator. technical background [0002] The detrimental aspects of the vibration of objects are increasingly being highlighted. [0003] Although the engine vibration isolation technology is changing with each passing day, the vibration of the engine of...

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Problems solved by technology

[0021] 2) Due to the large support stiffness of the rotor system, elastic vibration isolation is often not used; the particle damper shell is made of stainless steel metal material, and the radial deformation is very small during the working process (…that can flex somewhat in the radial direction of the bearing.---quoted from the patent), its stiffness coefficient is large, so it cannot be used for the requirements of mobile instruments and equipment that need both vibration isolation and vibration reduction; because the requirement of vibration isolation for the system is its The stiffness coefficient is small to reduce the natural frequency of the support and avoid the excitation frequency, and the requirement for vibration reduction for the system is that the system must have damping to suppress the natural peak value;

[0024] 5) This patent also discloses that a pressurizable cavity is added to the cavity of the particle damper, so as to control the tightness of the particles in the cavity of the particle damper through external fluid pressure, so as to realize the adjustment of damping , it can be seen that although the use of a metal shell can increase the working temperature of the particle damper, due to the high rigidity of the metal, it is not like the elastic rubber shell that can be filled with pre-tightening force, so it has to be solved by adding a fluid cavity ;

[0025] 6) Under the premise of the same size, it is obvious that the processing and manufacturing cost of the special-shaped metal shell is high, and it cannot be used for support and vibration reduction of the legs of the household drum washing machine, because home appliances are very sensitive to cost;

[0026]7) At the same time, due to the long service life and low price of civilian products, it is difficult to apply to vehicles due to the low fatigue strength of metals and high processing costs. engine vibration isolation and cab vibration isolation

[0027] Can the existing cheap elastic vibration isolator and cheap particle damper be organically combined on the basis of existing vibration isolation technology and devices? Thereby utilizing the advantages of high elasticity and large deformation of the existing elastic vibration isolator to make up for the shortcomings of poor elasticity and limited deformation of the existing high filling rate (greater than or equal to 80%) particle dampers; using the existing high filling rate particles The large damping advantage of the damper that is positively correlated with the excitation acceleration in the wide frequency range makes up for the shortcomings of the existing elastic vibration isolator with too small damping; thus it is designed to withstand the gravity or preload between the support and the controlled object, and It is a broadband damping vibration isolator that can implement vibration isolation for the support and the controlled object, and can suppress one or more inherent peaks in the frequency band from almost zero to several thousand Hz, so as to overcome the shortcomings of the above technologies

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