RU2272671C2 - Jaw crusher - Google Patents

Abstract

FIELD: crushing or disintegrating materials.

SUBSTANCE: jaw crusher comprises unmovable and step movable jaws. The jaws are mounted at a nip angle that exceeds the permissible value. The nip angles of the steps of the crushing chamber is less than the permissible value and provide the nip of the material to be crushed.

EFFECT: decreased height of crusher charge.

1 dwg

Description

The invention relates to crushing equipment and may find application in the quarry crushing of rocks to the size of pieces transported by a conveyor belt.

Known vibration jaw crusher type VSChD (Vaysberg L.A., Zarogatsky L.P. New equipment for crushing and grinding materials // Mining Journal. - 2000. - No. 3). To reduce the loading height, this crusher is designed with an inclined crushing chamber.

A disadvantage of the known device is the reduced throughput of the inclined crushing chamber and overgrinding of stone material.

The closest in technical essence to the claimed invention is a jaw crusher (Japanese Application No. 55-106549 class. In 02 With 1/02; D 02 With 2/02, publ. 15.08.80). The crusher has a stepwise configuration of the working surfaces of the cheeks, forming a zigzag crushing chamber, tapering stepwise down.

The disadvantages of this crusher are large relative to the width of the feed opening, the height of the crusher and regrinding of the material.

An object of the invention is to reduce the loading height of the crusher by reducing the height of the crushing chamber.

This goal is achieved by the fact that in the known jaw crusher containing a fixed and step movable cheeks, according to the invention, the cheeks are set at a capture angle greater than the allowable value, and the capture angles of the steps of the crushing chamber are less than the allowable value and provide capture of the crushed material.

Distinctive features in comparison with the prototype is the installation of the cheeks at an angle of capture greater than the permissible value, while the capture of crushed material is ensured by setting the angle of capture of the steps of the crushing chamber less than the permissible value.

In the prior art, no technical solutions have been found that have the indicated set of features and a crushing chamber for a jaw crusher, in which the cheeks are installed at an angle of capture greater than the permissible value, and the angle of the steps of the crushing chamber is less than the permissible value.

In known technical solutions, for example, in the prototype, the cheeks are set at a gripping angle not exceeding the permissible value, and the gripping angles of the steps of the crushing chamber are selected so that the vertical component of the crushing force promotes the movement of the crushed material down, thereby increasing the productivity of the crusher.

In the proposed crusher, the cheeks are set at a capture angle greater than the permissible value, therefore, the height of the crushing chamber with a constant feed opening width is reduced, and the capture of crushed material is ensured by setting the angle of capture of the steps of the crushing chamber less than the permissible value.

The invention is illustrated by the drawing, which shows the crushing chamber of the proposed jaw crusher.

The crusher includes a fixed cheek 1 and a movable cheek 2 suspended on an axis 3, forming a crushing chamber. The cheeks 1 and 2 are lined with removable crushing plates 4. The movable cheek 2 is made with a stepped shape of the working surface, forming with the fixed cheek 1 the upper 5, middle 6 and lower 7 steps of the crushing chamber. In the upper part of the crushing chamber there is a loading hole 8, and in the lower part there is a discharge opening 9.

The fixed 1 and movable 2 cheeks are installed at a capture angle α _Щ exceeding the permissible value, and the capture angles α of the upper 5, middle 6 and lower 7 steps of the crushing chamber are less than the permissible value.

Jaw crusher works as follows. When the movable cheek 2 leaves, a pre-sorted material having a size larger than the maximum size of the finished product exiting the crusher is fed into the crusher through the feed opening 8. During the working stroke, the pieces of material are compressed by the cheeks 7 and 2, installed at a capture angle that exceeds the permissible value, but the pieces of material are not thrown upward, because crushing is carried out in the steps of the crushing chamber 5, 6 or 7, which have capture angles less than the permissible value and provide capture of crushed material. At the next departure of the movable cheek 2, a new portion of the rock is loaded into the crusher, and the material crushed by the previous compression stroke is discharged from the crusher through the discharge opening 9.

The proposed crusher in comparison with the prototype has a reduced height of the crushing chamber due to the installation of the cheeks at an angle of capture greater than the permissible value, and the angle of capture of the steps of the crushing chamber is less than the permissible value and ensure the capture of crushed material.

Claims (1)

A jaw crusher containing stationary and movable with a stepped shape of the working surface of the cheek, characterized in that the cheeks are set at a capture angle greater than the permissible value, and the angle of capture of the steps of the crushing chamber is less than the permissible value and ensure the capture of crushed material.