What Are Secondary Mineral Sizer Crusher Roller Installation Precautions
In many industrial fields such as ore processing and coal processing, mineral sizer (graded double-toothed roller crusher) plays a pivotal role, it is like a behind-the-scenes hero, quietly promoting the efficient operation of industrial production. Through its unique structure and working principle, it can accurately break large pieces of material into the required particle size products, laying a solid foundation for the subsequent processing process, which is directly related to key indicators such as production efficiency, product quality and production cost.
As one of the core components of mineral sizer, the installation method of the secondary crushing roller is more important. The correct installation method can not only ensure the stable operation of the equipment, give full play to its crushing capacity, extend the service life of the equipment, and reduce maintenance costs. Next, let’s deeply explore the installation mystery of the secondary crushing tooth roller.
Installation preparation stage:
(1) list of tools and materials
“If you want to do a good job, you must first use the tool”, and preparing the appropriate tools and materials is the basis for the smooth installation of the secondary crushing roller. We need to prepare different specifications of wrenches, such as adjustable wrenches, box wrenches, etc., for fastening and removing bolts to ensure a solid connection; lifting equipment, such as electric hoist, manual hoist, etc., according to the weight of the tooth roller and installation environment to select the appropriate lifting tools, in order to accurately lift the tooth roller to the installation position; the level is also essential to detect the levelness of the tooth roller installation to ensure the smooth operation of the equipment; in addition, it is necessary to prepare the corresponding specifications of bolts, nuts, washers and other connectors, the quality of these connectors is directly related to the stability of the tooth roller installation; the lubricating oil is used to lubricate the bearing and transmission parts of the gear roller, reduce wear, extend the service life of the equipment, and can choose high-performance lubricating oil that meets the requirements of the equipment.
(2) equipment and parts inspection
Before installation, careful inspection of equipment and parts is a crucial link. First of all, check the appearance of the secondary crushing roller to see if there are obvious cracks, deformation or wear and other defects, if there are these problems, it may affect the normal operation and service life of the roller. For example, cracks on the surface of the gear roll may gradually expand during the operation of the equipment, resulting in the fracture of the gear roll; deformation may cause the tooth roller to produce imbalance when rotating, causing equipment vibration and noise increase. Secondly, check the bearing of the tooth roller, rotate the bearing, feel whether it rotates smoothly, and there is no stuck or abnormal sound. If there is a problem with the bearing, it will lead to the tooth roller rotation is not flexible, increase the energy consumption of the equipment, and may even cause equipment failure. In addition, other related parts, such as keys, couplings, etc., should also be checked to ensure that their dimensional accuracy and surface quality meet the requirements, the wear or damage of the key may lead to unstable power transmission, and the misalignment of the coupling will affect the transmission efficiency and stability of the equipment.
(3) site planning and safety measures
Reasonable planning of the installation site can improve the installation efficiency and ensure the smooth installation. It is necessary to ensure that the installation site has enough space to facilitate the lifting, installation and commissioning of the tooth roller. The lifting path of the tooth roller should be kept unimpeded to avoid collision with other equipment or obstacles. At the same time, it is necessary to determine the position of the power supply to ensure that the equipment can be easily switched on for debugging during the installation process. In terms of safety measures, installation personnel must wear personal protective equipment such as safety helmets, safety shoes and gloves to prevent accidents during installation. Place warning labels around the device to prevent unnecessary damage to the installation area. In addition, when using the lifting equipment, it is necessary to operate in strict accordance with the operating procedures to ensure the safety of lifting, check the performance and safety of the lifting equipment before lifting, and maintain a stable lifting process to avoid shaking and collision.
Installation phase:
The first step in installing the secondary mineral sizer crusher roller is to determine its exact position in the installation site according to the basic drawing of the equipment. The basic drawing is like the blueprint of the building, which details the relative position of each part of the equipment and the surrounding environment, and is an important basis for the installation work. In determining the position, the need to use steel ruler, level and other tools, according to the crusher workshop process reference line to determine the longitudinal and horizontal center line, the longitudinal center line deviation should be controlled within 5mm, the transverse center line deviation control within 2mm, to ensure the accuracy of the equipment installation position.
After the location is determined, the base can be installed. As the support structure of the whole equipment, the levelness and stability of the base directly affect the running effect of the subsequent equipment. When installing the base, first set the sand pier cushion iron on the foundation to adjust the height and levelness of the base. The layout of the sand pier cushion iron should comply with the relevant specifications to ensure that the weight of the equipment can be evenly borne. Use a frame level to measure the levelness of the base. Ensure that the levelness deviation of the base is within 0.1mm/m. At the same time, ensure that the longitudinal center line deviation of the base does not exceed 1mm, the transverse center deviation is less than 0.5mm, and the elevation deviation of the base is controlled within the range of 3mm. By precisely adjusting the thickness and position of the cushion iron, the base reaches the required levelness and position accuracy, and then the foundation hole is grouting to fix the base on the foundation. In the grouting process, it is necessary to ensure that the concrete is packed tightly to avoid problems such as holes or cracks, which will affect the stability of the base.
(2) installation and calibration of tooth roller shaft
After the installation of the base is completed and the specified strength is reached, the installation of the tooth roller can be carried out. The installation sequence of the tooth roller is very important. Generally, the bearing seat is installed on the base first, and then the tooth roller is installed in the bearing seat. When installing the tooth roller, care should be taken to avoid damage to the shaft neck and bearing, and appropriate lifting tools and auxiliary equipment can be used, such as nylon sling, copper rod, etc., to place the tooth roller smoothly in the bearing seat.
After the installation of the mineral sizer crusher roller, the tooth roller needs to be calibrated, which is a key step to ensure the proper operation of the equipment. First of all, to calibrate the gap between the two roll teeth, the use of steel ruler for measurement, the gap error is required to be controlled within 2mm. The gap between the two roller teeth directly affects the crushing size of the material and the production efficiency of the equipment, if the gap is too large, it will lead to incomplete crushing of the material; if the gap is too small, it may cause equipment overload and even damage the tooth roll. Secondly, to calibrate the parallelism of the two roller lines, the use of steel ruler and feeler ruler to measure to ensure that the parallelism of the two roller lines is within 0.2mm/m. The uneven alignment of the two roller lines will cause uneven force on the tooth roll, accelerate the wear of the tooth roll, and also affect the stability of the equipment, resulting in vibration and noise. In addition, it is also necessary to calibrate the levelness of the shaft, and use the level instrument for detection. The levelness deviation of the shaft should be controlled within 0.1mm/m. If the levelness of the shaft does not meet the requirements, the device cannot run stably, which increases power consumption and wear. By accurately calibrating the parameters of the gear roller, the equipment can work smoothly and efficiently during operation.
(3) installation skills of crushing teeth
The crushing teeth are directly involved in the crushing of materials, and their installation methods vary according to different types. The common installation methods of crushing teeth are inclined pull block type, expansion sleeve type, etc.
When installing the inclined block crushing teeth, the tooth plate must first be installed in the dovetail groove on the roll body, so that the v-shaped groove of the tooth plate is aligned with the dovetail groove. Then, the first and second stay blocks are placed in the gap between the tooth plate and the dovetail plate, and the two stay blocks are pulled tight by the pull rod, so that the tooth plate is fixed on the roll body. During the installation process, pay attention to the angle and position of the cable-stayed block to ensure that it can provide sufficient fastening force, and ensure that the tooth plate is firmly installed without loosening. After installation, it is also necessary to check the flatness and verticality of the tooth plate to ensure that the tooth plate is in the same plane and perpendicular to the axis of the roller body to ensure the uniformity of the crushing effect.
The installation of the expansion sleeve crushing teeth is relatively complicated. First of all, it is necessary to select the appropriate specification of the expansion sleeve, ensuring that its inner diameter matches the outer diameter of the tooth roller, and the outer diameter matches the inner diameter of the installation hole of the crushing tooth. Before installation, it is necessary to clean the installation surface of the tooth roller and crushing teeth, remove oil, impurities, etc., to ensure that the expansion sleeve and the installation surface are closely fitted. The expansion sleeve is installed on the tooth roller, and then the crushing teeth are set on the expansion sleeve, and the torque wrench is used to tighten the bolts of the expansion sleeve according to the specified torque value, so that the expansion sleeve is expanded, so that the crushing teeth are firmly fixed on the tooth roller. When tightening bolts, it is necessary to pay attention to a symmetrical and uniform sequence to ensure uniform force on the expansion sleeve and avoid local stress concentration. After the installation is completed, it is necessary to check the fastness of the installation of the crushing teeth. You can judge whether the installation is firm by gently tapping the crushing teeth and listening to the sound. If the sound is crisp, it means that the installation is firm; if the sound is dull or loose, check the installation again.
The above is the installation method and experience of the secondary mineral sizer crushing gear roller. The secondary mineral sizer is a kind of crushing equipment specially applied to the field of coal and mining, which has the advantages of large processing capacity, large crushing ratio and high crushing efficiency.
