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 comprises an eccentric shaft, and the eccentric shaft comprises an eccentric shaft body,and a left rotating shaft and a right rotating shaft which are arranged at the left and right ends of the eccentric shaft body separately; the axes of the left rotating and the right rotating shaft are on the same line, and the left rotating shaft and the right rotating shaft are each provided with an excitation support, a counterweight and a synchronous pulley from inside to outside in sequence;the excitation support is an I-shaped support with a hole in the center, and the center hole of the excitation support is internally provided with a bearing housing which is internally provided witha self-aligning roller bearing; the counterweights and the synchronous pulleys on the right and left sides are symmetrical with respect to the central axis of a screen body, and the eccentric direction of the counterweights is consistent with the eccentric direction of the eccentric shaft; the counterweights and the eccentric shaft meet the torque ratio requirement of 5:48 with respect to the central axis of the excitation support; and the exciters are connected in parallel so that the excitation system can be formed. According to the modular self-balancing vibrating screen exciter, the shafting stress distribution can be improved, so that the central deflection of the eccentric shaft is not too large; and meanwhile the modular self-balancing vibrating screen exciter is compact in structure and easy in arrangement and maintenance, and can be removed overall.

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

Images