SU904808A1 - Stand for testing vibration screens - Google Patents

Description

(54) VIBRATION CRUSHING TEST BENCH

one

This invention relates to a technique for testing the reliability of vibrating screens under load.

A vibrating screen for separating wet materials by size is known, including a duct, mounted elastically with respect to the base, a vibrator and a sieve fixed in the duct. In the process / screening, the screen is clogged with "difficult grains." To eliminate clogging over the sieve, traverses are installed with one end of flexible elements with concentrated masses fixed on them. Due to the overall vibration of the box, flexible elements, the second end of which lies loosely on the sieve, strike it, removing it from jams of material grains. Chains or cables with cargoes 1 can be used as flexible elements.

Closest to the proposed technical entity is a stand for testing vibrating screens, which contains a set of mechanisms operating in a closed loop, namely: screens, conveyors, bunkers, chutes, dedusting devices, fans, feeders 2.

The disadvantage of this stand is its greater energy consumption, due to the large number of mechanisms that ensure the movement of the material in a closed loop. The purpose of the invention is to reduce energy consumption by eliminating the energy intensity of the elements of the stand.

This goal is achieved due to the fact that in the test bench for vibrating screens, including the base and

Q-screen, which consists of a box, a sieve and a vibrator, the screen is equipped with cross-arms, which are installed above the screen and to which the flexible elements with lumped masses are attached at one end. The other ends of the elements are freely placed on

15 sieves The flexible elements placed on the sieve imitate the loading of the screening material to be sorted.

FIG. 1 shows a schematic of the stand, a general view; in fig. 2 is a view A of FIG. one.

The tested vibrating screen 1 with elastic supports 2 is mounted on a fixed frame 3, to which the crossbars 4 are rigidly attached. To each crossbar are cascadedly attached to the upper ends of a series of chains or other flexible elements with lumped masses 5 lowered onto the screen 6 of the screen.

The load tests are carried out with the screen on. The roar, oscillating in a vertical plane, interacts through a sieve with flexible chains of a certain mass, which are held at one end on the traverse. In this case, the shock pulses are transmitted to the elements of the metal structure of the screen box, creating in them the voltage of the pulsating cycle.

To determine the value of the required load for testing, it is possible to strain-measure three points along the length of the duct, with a periodic load of the rumble once, with a process material at the calculated capacity and particle size distribution. By the number of traverse 4 and the number and length of flexible chains, it is possible to imitate the desired amount of technological load, which varies along the length of the sieve.

The use of the invention eliminates the cost of transporting

machines, chutes and bukker, significantly reduce energy costs and dimensions of the stand.

Claims (2)

1. Forward Germany No. 1758199, cl. 50 d 6/30, published 1971. 2. Pankrashin P.V. Stands for testing construction and road machines. M., “TsNIITEstroymash, 1971, p. 81-82 (prototype). BuS / Phi2.2