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Manufacturing is a strategic and basic industry to provide technology and equipment for the domestic economic industries as well as the national defense industry, it is also a concentrated embodiment for a country’s comprehensive strength as well as an important insurance for the industrial update and technological progress. Mining machinery plays a critical role in manufacturing industry. Recently, it is easy to observe the export-oriented development characteristic of this industry, and there’s an overall increase in the export of the products. In addition, a boom emerges among major mining machinery products like grinding device, crushing equipments as well as the sand making machine etc. The export of these traditional ones is always in a high growth.
Load torque characteristics of mining production machinery means the relationship of speed N and the corresponding load torque ML: N=f (ML). Electric drive production machinery is appears as a motor load. Usually mechanical load torque production characteristics are for short of load torque characteristics, or load characteristic.
Load characteristics of the production machinery can be divided into three kinds of situations: no relationship of load torque and speed; ratio change of speed and load torque; the speed changes quadratic equations proportion with load torque.
Here, we take the impact crusher as an example.
When the sensor is installed on detected objects or entering the medium to be measured, it will absorb energy or interference from the object and the medium. The physical quantity to be measured is deviation from true value, thus making it impossible to achieve the desired measurements, this is known as load characteristic of testing device (load effect). 　　Load effect occurs not only between the sensor and the measured objects, but exists between two stages of measuring device. Load effect of measuring instruments has its inherent characteristics. Therefore, when design and build measurement systems, we have to consider its impact reduces to the minimum, so as to improve test accuracy.
The continuous load characteristics of mining equipment are generally represented with heating and cooling curves. Each mining machine has a rated maximum thermal capacity. In accordance with this value, we determine the continuous operation time of mining equipment, such as jaw crusher, cone crusher. Corresponds to a certain amount of heat generation rate, the relationship curve of anode heat accumulation and time is called the heating curve of mining equipment (ball mill). Both curves of the maximum thermal capacity of mining equipment are drew in the same diagram, which reflects the continuous load characteristics of cone crushers used mining equipment.
Henan Hongxing Mining Machinery Co., Ltd is a joint-stock mining machinery manufacturing enterprise integrated in scientific research, production and marketing. In order to promote the competitive strength, the advanced technologies have been introduced from America, Germany, Japan and Australia, which established the international advanced production line, first-class modern testing base as well as research centers of sand maker, mill and mine-selecting equipment. Scientific management, advanced processing technology and innovative manufacturing theory make the company become the mining machinery manufacturing and exporting base in China.

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