A large-scale vibrating screen motion adjustment method and system

Abstract

The invention discloses a method for adjusting the motion of a large vibrating screen. The method comprises the following steps: (1) constructing a calculated projectile intensity-excitation circularfrequency database of the vibrating screen; (2) collecting displacement signals of a screen body in horizontal and vertical directions and motor speed signals of an excitation system; (3) obtaining amplitudes of displacement signals and the actually measured excitation circular frequency under the circumstance of stable motion of the vibrating screen; (4) calculating the actual projectile intensity; and (5) carrying out coordination control on the excitation system and a vibration isolation system on the basis of the required projectile intensity. The invention also discloses a system for adjusting the motion of the large vibrating screen. The system comprises a displacement detecting module, a rotation speed detecting module, a signal collecting card, a computer, a frequency converter, anactuator and a coordination controller. By means of the method and the system for adjusting the motion of the large vibrating screen, which are disclosed by the invention, the technical problems of low adjustment accuracy, small range, low efficiency and the like of conventional motion adjusting techniques can be solved.

Description

technical field [0001] The invention specifically relates to a method and system for adjusting the motion of a large-scale vibrating screen, which belongs to the technical field of vibrating screening. Background technique [0002] Vibrating screen is the key equipment for coal preparation production. When the process parameters (processing capacity or feed particle size, etc.) of the coal preparation line where the vibrating screen is located change, the projectile strength of the vibrating screen needs to be changed accordingly. According to the China Machinery Industry Standard (JB / T9022-2012), the projectile strength of large vibrating screens is 2.5 to 4.0, among which, for materials that are difficult to sieve, a large value should be taken, while materials that are easy to sieve should be taken as a small value, and for small sieve holes The sieve surface should take a large value, and the sieve surface should take a small value for a large sieve mesh. In the case t...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a large-scale vibrating screen motion adjustment method and system, and solve the technical problems of low adjustment accuracy, small range, and low efficiency of the existing motion adjustment technology

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