Waterfall falling into the material feed size is larger than when the second impeller feed size, they need to feed from two feed ports respectively. Ore hopper into the river gravel crusher, respectively, through the sub-feeder feeding tube into the center of the impeller, when the materials into high-speed rotation of the impeller, the impeller being rapidly accelerated up to several times its acceleration as well as the number of times the acceleration of gravity, and then at a rate per 70-100m / s from the impeller projectile out, first with the free-fall into the whirl crushing cavity material impact outside the impeller and broken, and with the impact of eddy crushing cavity material bed on the floor, the bed was material rebound oblique sprint to the top of the eddy crushing chamber, but also to change its direction of motion, deflected downward movement of the roller crusher, turn road materials emitted from the leaves to form a continuous material curtain, so Impact crusher, a crushing cavity material in the turbine as well as by two times the impact crushing effect. Throughout the crushing process, the material is self-reciprocal impact crusher, not in direct contact with the metal element. Since the channel from the impeller material emitted obliquely peripheral impact, forming materials in eddy crushing cavity rotational movement on the bed material, an eddy moving the grinding action between the material, due to the impact of friction between the pulverized material, crushed material discharged from the discharge port. Henan Senda Heavy Sand river gravel production with high performance stability, reasonable structure, high degree of automation, the entire production line in addition to the equipment and routine maintenance Sand turned down, the process is simple, almost no manual operation and other advantages, it is important to its high efficiency, low operating cost, high yield, high yield, finished stones uniform size, grain shape is good, in line with the national high-speed material requirements. Although the Sand at the factory has been running for 8 hours load time and space to adjust the various parts are normal, but in spite of such words in the Sand on-site installation should still conduct a comprehensive inspection. Check the oil pipe is connected mainly solid, add oil once again, checking each component connection, carefully check the impeller is caused by a foreign body, check the motor connections, the applied voltage is normal. Jog first before installing the belt, make sure the direction of rotation is consistent with the direction of Sand signs prohibited in the opposite direction of rotation. After confirmation by vsi crusher, in pre-production is first empty load and load test machine, no problem and then confirmed the actual production. Empty load operation takes 4 hours and then to load operation, the load operation time takes more than 8 hours time. On the roll crusher, sand making Anshun, Yuxin Senda provided by Henan new Senda Heavy Machinery Co., Ltd.. Henan new Senda Heavy Machinery Co., Ltd. (www.hnsdzg.com) strong, credible, in Zhengzhou crushing grinding equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Yuxin Senda and you hand into the brilliant, for a better future!