Improved resonant type vibrating screen

Abstract

Disclosed is an improved resonant type vibrating screen. Auxiliary springs are added below a screen box combination articulated beam and supports a screen box combination together with an original shear spring, so that work load of the shear spring is greatly reduced, and the problem of overwork fracture during usage of the shear spring is solved; a complex excitation system consisting of excitation ranks, an excitation rank connection frame and four resonant springs arranged at four corners of the lower portion of the excitation rank connection frame is used, and a spring transmission excitation force which is parallel to a screen machine vibration direction is used, so that the problem of serious abrasion of the resonant type spring is solved; the excitation ranks and the excitation rank connection frame of the complex excitation system are combined to arrange and tension a support net, so that the structure is simplified, vibration mass of the screen box combination is reduced, workload of the spring bearing the screen box combination is reduced, and meanwhile, fault hidden danger brought by fixed bolt looseness caused by vibration during usage is fundamentally eliminated; the improved resonant type vibrating screen is skillful in design, low in failure rate and maintenance charge, and reliable in work.

Description

technical field [0001] The invention relates to an improved resonant vibrating screen, which belongs to the technical field of separation equipment. Background technique [0002] Resonance vibrating screen is commonly known as "resonance screen". In addition to a series of advantages of general vibrating screens, this kind of screen also has the outstanding advantage of less power consumption. It is widely used in the fine material screening industry. In the existing resonant screen, the screen boxes are generally fixed together by connecting beams to form a combination of screen boxes. The installation on the frame is realized through the shear spring connection between the side of the connecting beam and the frame, and the screen box Driven by the vibrating motor unit installed on the combination, the overall vibration of the screen box combination is realized. Since the screen box combination has a large participatory vibration mass, the shear spring used to carry the com...

AI Technical Summary

Problems solved by technology

In the existing resonant screen, the screen boxes are generally fixed together by connecting beams to form a combination of screen boxes. The installation on the frame is realized through the shear spring connection between the side of the connecting beam and the frame, and the screen box Driven by the vibrating motor unit installed on the combination, the overall vibration of the screen box combination is realized. Since the screen box combination has a large participatory vibration mass, the shear spring used to carry the combined mass of the screen box will have a large deformation, and it is easy to Breakage occurs, so it will not only affect the normal operation of the screening operation, but also increase the maintenance cost of the screening machine

[0003] In recent years, a new type of resonant vibrating screen has appeared. In this vibrating screen, the surroundings of the working net (screen) are connected with the screen frame, and the resonance frame is set under the working net and parallel to the working net. While the box is vibrating in a straight line, the inertial resonance of the resonance frame is also used to strike the working net to make the working net produce compound vibrations. Due to the excellent material conveying and screening ability and the simple structure, it is favored by the fine-grained material screening industry. ; In such a resonant screen, the supporting screen of the working net is an indispensable and important part of the screen machine. Its setting and tensioning method in the resonant screen directly affect the service life of the working net and the reliability of the screen machine. Currently, The support net of the vibrating screen working net is set and tensioned by connecting hook plates and fixing bolts with the screen frame. The working load of the spring increases, which damages its service life. At the same time, it increases the hidden danger of failure caused by the loosening of the fixing bolts caused by vibration during use, which increases the failure rate of the vibrating screen.

[0004] On April 17, 2013, Chinese patent CN202877099U disclosed a resonant vibrating screen of the applicant. The vibrating screen: the outside of the resonant frame is connected to the resonant spring fixed on the inside of the screen frame through the end shaft. The axial direction of the force resonance spring is inconsistent with the vibration direction of the screen box, resulting in serious wear of the resonance spring and frequent occurrence of spring shedding, which seriously affects the normal operation of the screen machine, so it needs to be improved

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