Inspection of the discharge port of the crusher

The detection of the discharge port of the crusher is one of the contents of mineral processing testing technology. The purpose of this test is to adjust the size of the discharge opening of the controllable crusher in a timely manner, so as to efficiently control the particle size of the crushed products and reasonably balance the load of each section of the crusher. There are two methods for detecting the discharge port of a crusher: direct method and indirect method.

The direct detection method is the earliest, most common and simplest approach. It involves putting lead balls (or lead blocks and lead columns) into an unloaded crusher and measuring the dimensions of the compressed lead balls, lead blocks and lead columns discharged from the crusher to determine the size of the discharge port.

Indirect detection methods are further divided into general hydraulic detection methods and inductive hydraulic detection methods. The general hydraulic detection method involves setting a scale on the oil level indicator of the hydraulic device that adjusts the discharge port. The oil level actually reflects the position of the movable cone of the crusher and directly shows the size of the discharge port. The inductive hydraulic detection method relies on the electronic control system in the electro-hydraulic control device, that is, the inductive gap measuring device set under the main shaft or the automatic synchronous sensor set on the top of the main shaft, to automatically determine and display the position of the main shaft and the size of the ore discharge port.

The gap detection method can continuously detect the instantaneous size of the ore discharge opening, facilitating timely adjustment of the ore discharge opening and the realization of operation automation. However, this method can only be applied to crushers equipped with a hydraulic adjustment system for the discharge port and an electric-hydraulic control system, and is mainly used in cone crushers.