A modular self-balancing vibrating screen exciter and excitation system

Abstract

The invention discloses a modular self-balancing vibrating screen exciter and an excitation system. The exciter includes an eccentric shaft. The eccentric shaft includes an eccentric shaft body and left and right rotation shafts respectively arranged at the left and right ends of the eccentric shaft body. The axes of the left and right rotating shafts are on the same straight line, and the left and right rotating shafts are respectively installed with an exciting support, a counterweight and a synchronous pulley from the inside to the outside, and the exciting support is a tool with a hole in the center. The font support, the center hole of the excitation support is equipped with a bearing chamber, and the self-aligning roller bearing is installed in the bearing chamber. The counterweights and synchronous pulleys on the left and right sides are symmetrical about the central axis of the screen body, and the counterweights are eccentric. The direction is consistent with the eccentric direction of the eccentric shaft, and the torque of the two about the central axis of the excitation support satisfies 5:48; the exciters can be connected in parallel to form an excitation system. The invention can improve the force distribution of the shaft system, prevent the center deflection of the eccentric shaft from being too large, and has a compact structure and convenient arrangement; it can be disassembled as a whole and is convenient for maintenance.

Description

technical field [0001] The invention relates to the field of vibrating screens, in particular to a modular self-balancing vibrating screen exciter and an exciting system. Background technique [0002] The vibrating screen is a very important screening equipment in the coal preparation industry. It separates particles of different diameters through the vibration of the porous screen surface to complete the screening operation. The vibrating screen can be divided into single-layer vibrating screen and multi-layer vibrating screen according to the structure of the screen surface. layer shaker. According to the motion trajectory, it can be divided into circular vibrating screen, elliptical vibrating screen, linear vibrating screen and variable trajectory vibrating screen. In recent years, with the development requirements of clean coal utilization, the requirements for coal processing capacity and processing efficiency have been increasing, and new requirements have been put fo...

AI Technical Summary

Problems solved by technology

At present, vibrating screen exciters mainly have two forms: shaft eccentricity and block eccentricity. The shaft eccentricity can provide a large excitation force, and at the same time, it is not sensitive to the installation symmetry, and it is not easy to cause the overturning moment of the screen body due to installation errors; With the increase of the body width, the deflection of the middle part increases rapidly after the eccentric shaft is lengthened, which has an adverse effect on the structural strength, and the eccentric shaft is inconvenient to disassemble and assemble, which requires a large maintenance space, which limits its application on large vibrating screens

The block eccentric exciter is easy to install, but due to the small excitation force per unit, multiple units are often required to be connected in parallel, and the main beam is required as the installation load-bearing structure, which requires a large dead weight of the structure; after the side plate is installed, a universal coupling is required Connection, the two sides are not easy to synchronize, and additional support structure reinforcement is required

In addition, the existing excitation structure is difficult to change its installation position, and can only provide a single form of excitation force for the vibrating screen, which has poor flexibility and expandability

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