Anti-resonance type resonance screen

Abstract

The invention relates to an anti-resonance type resonance screen, which belongs to the technical field of oscillating machinery. The anti-resonance type resonance screen comprises an upper mass body, a lower mass body, a main vibrating spring, a vibration exciter, a vibration isolation spring, levers, balance weights, a base, a motor, a driving shaft, and a motor bracket. The upper mass body is provided with the vibration exciter, the upper mass body is connected with the lower mass body through the main vibrating spring, the lower mass body is arranged on the base through the vibration isolation spring, at least four levers vertical to the vibrating direction are arranged symmetrically between the upper mass body and the lower mass body through hinges, and one end of each lever is provided with the balance weight. The anti-resonance type resonance screen can be operated in a resonance state and an anti-resonance state simultaneously, has good vibration isolation effect and solves the vibration isolation problem of the prior resonance screen, and the mass of the lower mass body can be much far less than that of the prior resonance screen so that the weight of the complete machine can be greatly reduced. Because of the principle of resonance, the required exciting force can be greatly reduced, and the mass of the exciter can be reduced in favor of saving energy and improving the service life of a screening machine.

Description

technical field [0001] The invention belongs to the technical field of vibration machinery, and in particular relates to an anti-resonance type resonant screen, which is suitable for classification of raw coal, minerals, sintered ore and other bulk materials. Background technique [0002] Vibrating machinery is a large class of mechanical equipment that uses vibration to complete various processes, such as vibrating conveyors, vibrating screens, vibrating dryers, vibrating road rollers, etc. There are many types of traditional vibrating screens, and there are coal grading vibrating screens according to their uses. , ore grading vibrating screen, cold ore sieve, hot ore sieve, etc.; according to the screening principle, there are probability sieve, equal thickness sieve, probability equal thickness sieve, etc.; according to the driving principle, there are elastic connecting rod type, electromagnetic type, inertial type , pneumatic and hydraulic methods; it can also be divide...

AI Technical Summary

Problems solved by technology

However, the dynamic load of this kind of vibrating screen is relatively large. In order to reduce the dynamic load transmitted to the foundation, two-mass is mostly used. In order to obtain a good vibration isolation effect, the mass ratio of the lower plastid to the upper plastid should not be too small. , generally not less than 0.6, even so the vibration isolation effect is still not ideal, but the weight of the whole machine is very large

The failure rate of the screen box is high, and the service life is not ideal

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