Barrel roll laundry machine wide band elastic granule damper

Abstract

The invention relates to a broadband elastic particle damper of a rolling laundry machine, the elastic particle damper 3 is formed by combining an elastic vibration isolator 5 with a particle damper 10; the elastic particle damper 3 can be positioned between a case 8 of the rolling laundry machine and a supporting ground 40, or between an oscillating damper 15 and the case 8 of the rolling laundry machine or a tumbling cylinder 12, or can be simultaneously positioned between the case 8 of the rolling laundry machine and the supporting ground 40 as well as between the oscillating damper 15 and the case 8 of the rolling laundry machine or the tumbling cylinder 12; the particle damper 10 comprises a sealed cavity 80 and particles 100 that are padded in the cavity, and is mainly used for providing frictional damping for a vibrating system in a broadband range and inhibiting formants by utilizing the mutual frictional action between the particles.

Description

technical field [0001] The invention relates to a wide-band elastic particle damper for a drum washing machine, in particular, an existing elastic vibration isolator and a particle damper are organically combined, and the advantages of the existing elastic vibration isolator's high elasticity and its large deformation are utilized, Make up for the shortcomings of poor elasticity and limited deformation of the existing high filling rate particle dampers (greater than or equal to 80%), and make use of the advantages of large excitation-related damping in the wide frequency range of the existing high filling rate particle dampers to make up for the existing high filling rate particle dampers. A wideband elastic particle damper for a drum washing machine with the disadvantage that the damping of the elastic vibration isolator is too small. technical background [0002] In recent years, domestic drum washing machines, which have been introduced into households in batches, have be...

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Problems solved by technology

[0016] 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;

[0019] 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 ;

[0020] 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;

[0021] 7) At the same time, due to the long service life and low price of civilian products, due to the low fatigue strength of metal and high processing costs, it is difficult to apply to engine vibration isolation and cab vibration isolation of vehicles, etc.

[0022] 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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