Three-degree-of-freedom flip-flow screen

Abstract

The invention discloses a three-degree-of-freedom flip-flow screen which comprises a support frame assembly, a screen box, a movable beam, a fixed beam, a rubber shearing spring, a movable beam connecting plate, an inertial exciting device, a transverse exciting device and a screen piece, wherein the support frame assembly is composed of a front support frame, a rear support frame and an exciter support frame. The screen box is supported on the front support frame and the rear support frame through a rubber damper spring. The fixed beam is fixedly connected with the screen box. The movable beam connecting plate with the movable beam is connected with the screen box through the rubber shearing spring. The two ends of the screen piece are respectively and fixedly connected with the movable beam and the fixed beam. The power end of the inertial exiting device and the power end of the transverse exciting device are fixedly installed on the top of the exciter support frame. The screen piece can obtain the vibrational excitation with three degrees of freedom, and the parameters of the inertial vibration and the transverse vibration can be adjusted separately. The three-degree-of-freedom flip-flow screen is particularly suitable for screening of humid materials with the fine granularity, and has the advantages of being compact in structure, long in service life, large in processing amount, high in efficiency and low in cost.

Description

technical field [0001] The invention relates to the field of vibrating screening equipment, in particular to a three-degree-of-freedom relaxation screen, which can simultaneously realize the vibration of three degrees of freedom in space at most. Background technique [0002] The relaxation screen is a new type of screening machine developed from the traditional circular vibrating screen in the early 1980s. The screen is made of stretchable polyurethane rubber material. When working, the screen is alternately tensioned and loosened to make the material move forward and bounce, which can prevent the material from sticking to the screen and blocking the screen holes. At the same time, due to the use of flexible sieve plates, the projectile acceleration can reach 30-50 times the acceleration of gravity, and the maximum amplitude of the sieve plate can reach 40mm, so the sieve holes are not only not easy to be blocked, but also the screening efficiency is improved, the processin...

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Problems solved by technology

China's existing patents also propose some design schemes for relaxation screens, such as the Chinese patent application number 97235985.0, which proposes a suspension type bilateral drive relaxation screen, which is rigidly connected except for the screen mesh, which is not conducive to extending the relaxation screen The service life of the outer screen frame and the inner frame are required to be equal, and the size of the screen holes is arranged according to the law of the probability of passing through the screen, which requires high manufacturing precision; the Chinese patent application number 201310574957.2 discloses a relaxation vibrating screen, which Placing the excitation device under the screen frame occupies a large working space, and the position of the excitation center and the center of mass is quite different, which is not conducive to the stability of the work; the Chinese patents with application numbers 201220392205.5, 201220390817.0, and 201220390809.6 are respectively Proposed the single-layer, double-layer and three-layer relaxation screen designed by Orui (Tianjin) Technology Co., Ltd., and the Chinese patents with application numbers 201320019829.7, 201320019702.5, 201320019852.6, and 201320019957.1 proposed the design of Qinhuangdao Yougema Industrial Technology Co., Ltd. Single-layer and double-layer banana screens and relaxation screens, the main part of these designs are similar, and the number of layers of polyurethane screens is increased on the basis of the original single layer, but increasing the number of screen layers does not effectively improve the screening performance. efficiency, and the above design increases the quality of the relaxation sieve, it is not easy to control the relaxation sieve, and increases the power consumption of the work

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