Zero-eccentricity start-stop vibrator of vibrating screen

Abstract

The vibrating screen zero-eccentricity start-stop vibrator comprises a vibrator body, a concentric shaft is arranged on the vibrator body, bearings are symmetrically arranged on the concentric shaft in a sleeving mode, a bearing cover and a bearing seat are arranged on the two sides of each bearing respectively, a sleeve is clamped to one end of each bearing seat, and a labyrinth cover is clamped to the other end of each bearing cover. Self-adjusting eccentric parts are symmetrically installed at the two ends of the vibrator body, main frames connected with the concentric shaft are arranged on the self-adjusting eccentric parts, movable eccentric blocks are symmetrically connected to the two sides of the lower end of each main frame, balancing weights are further arranged on the movable eccentric blocks, pull rods are symmetrically connected to the upper ends of the main frames, and spring pressing plates are arranged at the upper ends of the pull rods. And the upper and lower ends of the pull rod are sleeved with springs. The zero-eccentricity start-stop vibrator of the vibrating screen mainly depends on the self-adjusting eccentric part as a core component, and meanwhile, a traditional eccentric shaft is changed into a concentric shaft, so that the vibrator is in a zero-eccentricity state and does not generate vibration force at the start initial section and the stop tail section of the vibrating screen.

Description

technical field [0001] The invention relates to the technical field of vibrators, in particular to a zero-eccentric start-stop vibrator of a vibrating screen. Background technique [0002] The vibrating screen works by using the reciprocating rotary vibration generated by the vibrator excitation. The vibrating screen is generally composed of a vibrator, a screen box, a support or suspension device, and a transmission device. The motor drives the main shaft of the vibrator to rotate through the V-belt. Due to the centrifugal inertial force of the unbalanced weight on the vibrator, the screen box vibrates and the eccentric weight of the vibrator is changed to obtain different amplitudes. [0003] The existing vibrator mechanism still generates a strong vibration force in the low-speed region, and coupled with the resonance effect, the vibrating screen has a very strong resonance, which will cause damage to the screen body and related mechanisms such as the screen body. SUMM...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a zero eccentric start-stop vibrator for a vibrating screen to solve the problem that the vibrator mechanism on the market still produces a strong vibration force in the low-speed region proposed by the above-mentioned background technology, and the resonance effect is added to make the vibrating screen A very intense resonance is generated, causing damage to the sieve body and related mechanisms such as the sieve body

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