The cause and management of screw conveyor broken shaft

The cause and management of screw conveyor broken shaft - 2020 02 - 05 Wang Zhanguang ( Jiaozuo strong cement) Screw conveyor of the shaft with welding of spiral vane, along with the axis of rotation, the spiral blade material to the end or the destination, but once the broken shaft accidents, function is completely gone. Regarding to the following analysis the cause of the broken shaft. A, the cause of the broken shaft for screw conveyor, the shaft material generally choose thick skin tube, broken shaft screw conveyor is larger accident, its reason has the following points. 1. Material problems in the process of manufacturing, did not walk according to requirements of the design of material, such as: steel pipe improper material selection, using ordinary steel pipe alternative 45 # steel; More useful thin hoses are alternative thick hose, etc. , the results in the operation, the actual stress of steel tube will exceed allowable stress, so, shaft fracture is inevitable. The quality of the other shaft material is also key. 2. Manufacturing defect of reamer shaft key in the shaft and blade welding, manufacturing defects in welding spiral blade on the shaft, shaft will have some defects such as crack, not fusion, bite edge, these defects will produce stress concentration, cause broken shaft; Second, the welding deformation can make the shaft bent, make the operation leaves, increase the additional load, making it easier for the shaft fracture. Shaft with flange welding, can make the shaft with flange separation directly. 3. Installation precision is less than when the installation precision is low, will increase the additional load, for example, coaxial degree is low, running will be awful a neck, reamer and shell friction and so on, for example, can cause axial force increased. 4. On running, runtime, reamer internal into foreign body, or large, can cause jam, that conform to multiply, causing overload broken shaft. 5. Inadequate maintenance maintenance does not reach the designated position is also an important reason for the broken shaft, such as the partial penetration, grinding axial thin is not handled in time, still make do run end bearing or intermediate bearing damage, can make in accordance with increases with the broken shaft. 6. Awful a machine start regardless of material packed into degrees, don't do cleaning, consecutive start, not bad electrical appliances will be broken shaft. Second, screw conveyor broken shaft processing screw conveyor in the cement industry, is the main and important equipment, but for the whole production line, once the failure, also can cause paralysis of production line of, also need to pay attention to, in view of the reamer shaft broken, need to do the following work. 1. Be maintained in the daily management, strengthen inspection supervision inspection according to inspection system, wi, extend the service life of wearing parts to do a good job of lubrication, thereby reducing the main components of the additional load; When found in the middle, end bearing damage to timely make emergency repair, avoid to cause big accidents. 2. If avoid overload operation in the inspection found that the friction noise, should be timely clean house or large; Found that too much bouncing shell material, timely cleaning dredge, when the equipment is found running current, jump stopping time, to find out the reason, eliminate the source resistance, ensure equipment fast operation. 3. Careful maintenance overhaul, deal with the abrasion of shaft, coaxial, supporting conditions and so on carries on the strict inspection, found that the problem handled in time, such as shaft grinding wear, wear thin to timely replacement or reinforcement, crack found desoldering timely repair welding, etc. 4. New equipment acceptance in the acceptance of new equipment and daily inspection, often takes the host, auxiliary less attention, this is the production of auxiliary equipment easy. Reamer axis in this trying to make acceptance. First check the thickness of a shaft, according to the drawing material meets the design requirements, and then to welding checker shaft and other parts whether there is damage defects, such as scars and welding defects, exclude hidden dangers before into the factory. 5. The installation of the equipment installation accuracy is critical to accurate operation of the equipment, if the installation precision is low, bouncing neck operation, not only increase the energy consumption, also damage spare parts, so the reamer shaft alignment to conform to the requirements of the standard, this will run fast and flexible. Conclusion: screw conveyor is the main road products, but also should pay attention to, in this special pointed out that because my level is limited, this paper has less than even wrong, please comment. Thank you very much! （ Source: wisdom cement)