Double-mass vertical vibration anti-resonance screen

Abstract

A double-mass vertical vibration anti-resonance screen comprises an upper mass and a lower mass, wherein the upper mass comprises a screen and a screen connecting rack matched with the screen; the screen is fixed on the screen connecting rack; the middle of the screen is high while two ends of the screen are low or the two ends of the screen are high while the middle of the screen is low; the lower mass comprises a vibration excitation box, a vibration excitation spring assembly and a vibration exciter; the vibration excitation box is connected with the upper mass through the vibration excitation spring assembly, and is connected with a foundation through an isolation spring assembly; and when the double-mass vertical vibration anti-resonance screen works normally, the upper mass vibrates in the vertical direction under the effect of the vibration exciter.

Description

technical field [0001] The invention relates to the technical field of vibration screening equipment, in particular to a two-mass vertical vibration anti-resonance screen. Background technique [0002] Screening equipment is an important equipment necessary for mining, mineral processing, coal preparation, building materials, thermal power plants, chemical industry and other industrial sectors. Its performance will directly affect the production capacity and technical and economic indicators of these industries. [0003] At present, vibrating screens at home and abroad basically use single-mass far-super-resonance technology for design and development. The single-mass vibrating screen has the following technical defects in practical application: 1. Since the operating frequency of the vibrating screen is far beyond the resonance frequency, the required excitation force is relatively large, and the power consumption is also relatively large; 2. The vibrating screen must go th...

AI Technical Summary

Problems solved by technology

The single-mass vibrating screen has the following technical defects in practical application: 1. Since the operating frequency of the vibrating screen is far beyond the resonance frequency, the required excitation force is relatively large, and the power consumption is also relatively large; 2. The vibrating screen must go through In the resonance zone, the amplitude when passing through the resonance zone is 4 to 7 times the working amplitude. The vibration of the equipment is large, resulting in unstable operation and easy damage. At the same time, the failure rate is high, which increases maintenance costs, reduces work efficiency, and reduces service life. ;3. When the vibrating screen is working, the amplitude will decrease with the increase of the feeding material. In order to meet the production and use requirements, it is necessary to adjust the exciting force according to the feeding amount to maintain the vibration screen amplitude.

For the traditional single-mass vibrating screen, the mass of the participating vibration and the exciting force are contradictory. If the mass of the participating vibration is large, the exciting force required is large, and if the exciting force is large, the thickness of the component must be increased to ensure its strength, which leads to an increase in the quality of vibration, which is not conducive to the development of vibrating screens in the direction of heavy and super heavy

[0004] The patent application number is 200810012489.9 discloses an anti-resonance vibrating screen, which includes: the screen box is an upper plastid, the exciter is a lower plastid, a main vibration spring, a vibration exciter, a vibration isolation spring, a foundation, a motor, etc. , the upper plastid of the screen box is the working part of the anti-resonance vibrating screen, the lower plastid of the exciter is the driving part, the exciter is installed on the exciter, the screen box and the exciter are connected by the main vibration spring, and the excitation The body is located on the foundation through the vibration isolation spring, the motor is installed on the motor frame, and is connected with the vibrator through the transmission shaft, but in the above application, one end of the screen box is high and the other end is low, and the screen box is vertical to the screen surface. Vibration in the direction of the screen box makes the stability of the vibration of the screen box poor. In addition, the material runs from the high end of the screen box to the low end. The wear conditions of different positions of the screen box are inconsistent, and the materials on the screen box have a greater impact on the vibration stability of the screen box. Big, that's where existing technology falls short

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