1.The reversing drum and chassis integral sliding
At present, most of the chain bucket elevator using floating reversing drum, tensioning mode for screw tightening. This tensioning connection is driven from the dynamic shaft through the housing, installed on the outer housing, and the housing and reversing rollers slide up and down with the tensioning of the tape or chain. However, it is necessary to open a oblong hole on the shell, commonly used polyurethane plate seal. In the actual production operation process, the reversing drum or the vibration of the moving shaft will lead to a gap in the seal, dust will escape from the gap. The improved method can be adopted for inserting the fixed shell into the active body and bolted it to the bracket, filling the foaming rubber of its sealing action between the fixed shell and the moving body, while fixing the redirection drum, the moving shaft and the bearing seat in the actual operation of the hoist on the active body, the active body drives the redirection drum and the driven shaft through the housing, Adjust the tensioning force of the chain or dustpan belt. The housing is fixed to the active body without opening holes, so the dust escape phenomenon can be avoided. At the bottom of the active body to set an arc cleaning port, bucket elevator normal operation of the closed sweep, when bucket elevator plugging or downtime, open the cleaning mouth, clean the shell body of the accumulation, to prevent the material decay problem on the lifting machine work, and thus enhance its efficiency. 2. Hydraulic tensioning device
When chain bucket elevator is in the long-term use of the process, the chain will be gradually elongated, to solve this problem, it is often used to adjust the tightening screw or increase the counterweight, but the nut due to dust and rust, resulting in the rotation between it and screw difficult, and then make the tensioning device adjustment difficulties, often need to destroy the nut or screw, After re-replacement, repair the tensioning device. For this problem, the method can be used to improve the screw tightening mode to hydraulic tightening. Hydraulic tightening device includes hydraulic pump, tightening cylinder and supporting electric control box. According to the actual production demand, hydraulic pump and pressure sensor work together to ensure that the working pressure of the system is stable, and then through the work pressure to tighten the cylinder tightening chain or dustpan belt. The hydraulic tightening device also needs to be set with an accumulator, which can reduce the actual operating time of the motor's opening and stopping frequency. The pressure provided by this device should be constant and soft, which can not only prevent skidding, but also make the hopper jam to ensure that the chain or dustpan belt is in a tight state, it will not be pulled off, so as to the shaft, chain or dustpan belt and other components to protect, to ensure the safe and stable operation of the bucket elevator.
3. The head and tail wheels are connected to the shaft and using the account sleeve
At present, the regular connection between the drum and the reversing drum and the shaft of chain bucket elevator is the bonding method, which requires the addition of the key way on the shaft and the hub to ensure the synchronous rotation of the shaft and drum. Therefore, its use of the process will have a incision effect on the connector, so that the connection at the cause of strain concentration, the emergence of multidirectional stress state, so that the material brittleness phenomenon caused by the shaft and hub and other components damage, greatly reducing the efficiency and service life of the shaft and hub. To solve the problem of stress concentration at the junction of Shaft and hub, the connection mode between shaft and hub can be improved to expansion sleeve coupling. It is the use of tightening high-strength bolts to create pressure and friction between the expansion sleeve and the shaft, to achieve synchronous rotation of the shaft and drum. Compared with the traditional bond coupling, the advantages of the expansion sleeve coupling method can be summed up as the following four points: 1) Simple manufacture and installation, installation of expansion sleeve shaft and hub accuracy requirements, no need for other equipment to assist, 2) simple and convenient disassembly, simply release and ejection screws can be used to separate the expansion sleeve and shaft components; No key connection, no incision effect, so its service life is relatively long, there is no relative sliding imagination in the actual operation, the degree of wear is lighter; 4) when installing the axial, this connection method is easy to adjust the axial desired position size.