A damping shock absorber for a magnetorheological fluid washing machine with double outlet rods and its manufacturing method

Abstract

The invention provides a double-output rod magneto-rheological fluid washing machine damping absorber and a manufacturing method thereof. An output damping force value is 40-200N, and a double-output rod structure fast in response is more suitable for high-frequency and small-amplitude damping vibration attenuation of a washing machine. An absorbing and buffering expansion ring is adopted for absorbing volume expansion caused by temperature rising, and the damping and buffering function is achieved. Low-density and low-viscosity magneto-rheological fluid is adopted as a working medium, annular gaps reserved in an excitation piston and an outer cylinder body are combined, and therefore the damping absorber can output the small damping force value under the zero-current and zero-magnetic-field working condition, the adjusting range of the damping force value output by the damping absorber is enlarged, and the damping force value with the adjustable amplitude can meet the requirements of washing machines of various specifications smaller than 5kg or larger than 8kg.

Description

technical field [0001] The invention relates to a damping shock absorber for a magnetorheological fluid washing machine with double outlet rods and a manufacturing method thereof, in particular to a double outlet rod structure and low-density and low-viscosity magnetorheological fluid as a working medium to manufacture a damping damper for a magnetorheological fluid washing machine. A vibrator belongs to the field of damping shock absorbers. Background technique [0002] The vibration problem of the washing machine has always been a node in the design of the washing machine. The uneven distribution of the laundry in the drum forms a rotating eccentric load, which generates a periodic excitation force, thereby forcing the washing machine cabinet to generate vibration and noise. During the working process of the washing machine, especially in the high-speed dehydration stage, the balance in the drum will be lost due to uneven weight distribution, causing violent vibrations and...

AI Technical Summary

Problems solved by technology

[0004] China National Invention Patent No. CN201210292603.4 proposes a double-rod magnetorheological fluid damper and its sealing structure. Although its double sealing structure achieves a good sealing effect, when the magnetorheological fluid damper excitation coil Under the dual effects of long-term energization and heat generation and the temperature rise caused by the long-term shearing action of the magnetorheological fluid, the expansion of the magnetorheological fluid in the cylinder leads to an increase in the internal pressure in the cylinder, and the elastic sealing structure caused by the increase in internal pressure Deformation locks the piston rod, and the static friction force will increase significantly. At this time, when low damping output is required, the temperature and internal pressure cannot be reduced instantaneously, and the damping force of the magneto-rheological fluid cannot be reduced.

In addition, excessive internal pressure will cause accelerated wear and leakage of the sealing structure, affecting the service life of the device

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