Mineral sizers, as the core equipment of mobile crushing station and semi-mobile crushing station in semi-continuous mining technology system of large open-pit mine, are widely used in mines. The performance of semi-continuous mining technology system depends largely on the crusher. The semi-continuous mining technology system puts forward high requirements on the reliability, maintainability and compact structure of the crusher. At present, the crusher used in the mine consists of a roller shaft, a number of tooth ring assemblies 21 installed in the middle of the roller shaft, a spacer ring 22 installed between the tooth ring assemblies 21 (as shown in figures 6 and 7), a floating end bearing house assembly, a fixed end bearing house assembly, and an axial positioning device installed at both ends of the roller shaft. The tooth ring assembly and spacer ring of the existing mineral sizers are independent of each other. As a result, the existing crusher has a lot of parts and is relatively difficult to install. Especially, when the middle tooth ring is damaged, it is necessary to remove the axial positioning device and bearing seat assembly of the beginning part and remove the tooth ring assembly from the damaged tooth ring assembly to the end of the crushing roll. To remove the damaged gear ring assembly and replace the new gear ring assembly, and then install the previously removed parts. It can be seen that the disassembly of the existing mineral sizers is relatively troublesome.

The purpose of our design is to meet the reliability and maintainability requirements of the crusher in the semi-continuous mining process system, and to provide a reliable and easy to disassemble mineral sizers ring assembly. A tooth ring assembly comprises a ring tooth seat 13, a crushing tooth 14 and a separator 15: The ring tooth seat 13 is a hollow regular polygon cylinder body, which is composed of a crushing tooth seat part 130 and a partition seat part 131 arranged side by side formed in one body. The ring tooth seat 13 inner hole is provided with a pair of symmetrically arranged keyway 133 for connecting with the crusher crushing roll spindle 6 through a key; each cylinder of the crushing seat part 130 is provided with a dovetail key 134 penetrating the crushing seat part in a width direction for installing the crushing teeth 14: Each cylinder of the bulkhead seat part 131 is provided with a pair of threaded holes 132 for installing the bulkhead 15; the crushing tooth 14 is provided with a dovetail groove 141 matched with the dovetail key of the crushing tooth seat part 130 for mounting the crushing tooth 14 onto the crushing tooth seat part 130: The bulkhead 15 is provided with a pair of countersunk holes 151 for cylindrical head screws for matching the threaded holes 132 of the bulkhead seat part 131 so that the bulkhead 15 is mounted on the bulkhead seat part 131. The crushing tooth seat part 130 width b2 is less than the diaphragm seat part 131 width b1. [the width b3 of the crushing tooth 14 is slightly greater than the width b2 of the crushing tooth seat part 130, the width b4 of the diaphragm 15 is slightly less than the width b1 of the diaphragm seat part 131, and the sum of the width b1 of the diaphragm seat part 131 and the width b2 of the crushing tooth seat part 130 is equal to the width b4 of the diaphragm 15 and the width b of the crushing tooth 14 the sum of 1 is b1+b2=b3+b4. A step is formed between the crushing gear seat part 130 and the partition plate part 131 so that the diameter d2 of the outer cylindrical cylinder of the crushing gear seat part 130 is greater than the diameter d1 of the outer cylindrical cylinder of the partition plate part 131. The regular polygon can be positive 3-10 sided. A mineral sizers comprising the ring assembly is provided. Compared with the split ring assembly and the ring assembly, the two parts constituting the integrated ring assembly 13 of the invention, that is, the ring assembly and the partition assembly adopt an integrated design, so that the axial width b of the ring assembly is the sum of the split ring assembly and the width of the ring assembly b1 and b2.

Mineral sizers integrated ring seat part 13 is connected to crusher spindle 19 by a keyway 133, a pair of flat keys 18, whose inner hole has a symmetrically arranged keyway 133 whose length b is the sum of the split spacer ring and ring keyway lengths b1 and b2, the contact range b between the upper keyway and the flat key in the inner hole of the integrated ring gear seat is more than doubled compared with the contact range b2 between the upper keyway and the flat key in the inner hole of the split ring gear ring, so that the maximum stress level of the flat key 18 and the keyway 133 during work is more than doubled, which reduces the damage of the load on the crusher and improves the service life and reliability of the crusher. The crushing tooth 14 with dovetail groove 141 is connected with the dovetail key 13 of the integrated ring tooth base through the dovetail groove, making the assembly and disassembly more convenient and the connection more reliable. The diaphragm 15 is connected with the ring tooth holder 13 by screws. The screws do not bear shearing and bending loads, and are easy to deform, easy to disassemble, and reliable to connect. The width of the crushing tooth base part b2 is less than the width of the partition plate seat part b1, the diameter d2 of the outer cylinder surface of the polygonal cylinder body of the crushing tooth base part is greater than the diameter d1 of the outer cylinder surface of the polygonal cylinder body of the partition plate seat part, the width b3 of the crushing tooth is less than the width of the partition plate b4, when working, when a crushing tooth is damaged, it can be replaced separately. The width of the crushing tooth b3 is slightly larger than the width of the crushing tooth seat b2, and the width of the partition board b4 is slightly smaller than the width of the partition board seat b1, and b1+b2=b3+b4, so the crushing tooth is easier to process and assemble. It can be seen that the mineral sizers gear ring assembly is reliably connected to the crusher spindle, and it is easy to disassemble and disassemble. It can be easily and quickly installed and maintained on the mobile equipment, which greatly reduces the time required to replace the crushing teeth and significantly improves the production efficiency of the equipment.

Optimization Of Roll Tooth Profile And Configuration For Mineral Sizers 2

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