Mineral sizer crusher The working object of mineral sizer crusher is various ores, rocks and coal, etc. Their physical properties and joint structure are ever-changing, so it is not appropriate to use the formula derived from pure theory for parameter design. Only on the basis of the crushing theory of mineral sizer crusher, the empirical formula derived from test bench test and industrial operation practice is feasible. With the continuous development of people's production practice, the correction coefficients of various broken materials will be obtained, and the empirical formula will give more accurate results. As the original design parameters, the output is provided by the user, which is an important basis for determining the structure and transmission parameters of mineral sizer crusher. It must be satisfied in the design and a certain amount of surplus should be left. Q=3600a·tS formula: Q 1 output, /h; a- filling coefficient, a=0.25~0.4: linear velocity at the middle of one or two crushing rollers, /s; S The area between one or two crushing rollers that can pass through the material, m. According to the feeding and discharging size proposed by the user, the diameter of the tooth plate of the crushing roller, the number of teeth on each plate, the tooth shape and the center distance of the two tooth rollers can be determined, and the smooth biting and discharging granularity of the feeding can be ensured.
The transmission parameter design should first determine the speed of the tooth roller according to the type of the mineral sizer crusher material put forward by the user and whether there are too crushing requirements. Selected first tooth tip linear velocity t bags, general v peak value may take 1.3 m/s, 1.5 m/s, 1.7 m/s, 1.8 m/s, 1.9 m/s, 2.0 m/s, 2.2 m/s,... , 6.0 m/s; After the linear velocity of the tooth tip is determined, the v value in the equation can be calculated. The upper limit of v tip value is constrained by power N. When the power N is fixed, when the tip value is small, the rock breaking force is large, and the output is low. When the value is high, the breaking force decreases and the yield increases. The v tip of mineral sizer crusher or rock crusher takes 1.3 1.7m/s, and coal takes 1.7~6m/s(without excessive crushing requirements). In the case of lack of experience, "empty is easy to take small but not big. When calculating the output, the output of one disc is calculated first, and then the required number of discs is determined according to the output Q. The calculation of the main parameters is completed, and then the rock-breaking force and corresponding output of the mineral sizer crusher designed by the double-tooth roller can be estimated, which is very helpful for the serialization design of products.
The industrial operation verifies that the power calculated by the formula can meet the requirements of equipment operation. In normal crushing operation, the motor current is generally 30%~40% of the rated current of the motor: some people may think that the power calculated by the formula is too excessive, but the actual situation is not so. It should be taken into account that the working conditions of mineral sizer crusher with double tooth roller are complex, and the equipment itself must have the ability to deal with abnormal conditions. And the equipment is generally run on the production line, once the problem will cause the whole line to stop production:, will cause great economic losses to the user, so the power parameters to leave a certain amount of wealth is completely necessary.
1. Determine the oil injection amount of the hydraulic coupling In the case of excess hydraulic coupling, according to the rated transfer value of the motor, find out the corresponding oil injection amount on the external characteristic curve of the hydraulic coupling, and oil injection can be done according to the oil injection amount.
2. It is better to select and adjust the crushing roller bearing with double row spherical roller bearing with oil groove in the outer ring of cone hole. This kind of bearing is easy to assemble and disassemble, and the bearing clearance can be adjusted by the tight sleeve, which eliminates the bearing failure problem caused by too large bearing clearance. The bearing clearance is directly related to the bearing capacity and service life, so the operating instructions should stipulate the bearing adjustment clearance value, so that users can check and adjust it regularly.
3. Sealing and lubrication design of Mineral sizer crusher Due to the bad working conditions of mineral sizer crusher, the bad sealing of crushing roller bearing is often the direct cause of bearing damage, so the sealing problem should be attached great importance to designers. At present, the domestic and part of the door mineral sizer crusher mostly uses labyrinth or labyrinth oil sealing. From the industrial operation, it is found that the sealing effect of this kind of sealing structure is not ideal, often there will be broken material dust into the bearing cavity, and grease infiltration dry junction, resulting in bearing damage, directly affect the service life of the equipment. In order to solve this problem, it can be considered to set up an automatic oil drying lubrication station, time and quantity to fill the oil between the maze and the oil seal, the excess oil is extruded through the maze, so that the dust can be prevented from entering the maze, but also to solve the lubrication of the bearing; Of course, the lower part of the bearing end cover must be equipped with an oil drain hole to discharge oil regularly. If the seal is good, the bearing is lubricated with lithium based molybdenum disulfide grease, and the equipment will generally run for 6 to 12 months without problems