Plate chain ascend the tail sealing

Plate chain ascend the tail sealing modification - 2020 12 - 03 stone sea Wang Anwei 1 ShuChao Feng Kai 1 ck tan jiunn-liang wu (2 1. Tangshan jidong qixin cement co. , LTD. ; 2. Tangshan jidong cement co co. , LTD. ) A chain hoist tail, equipment status board for external type counterweight structure form, more commonly the tail shaft end seal outside using seal structure. Equipment after long-term operation, the seal structure easy to appear the untight seal, lead to the tail ash, leakage phenomenon, if the governance risk phenomenon is not timely, ash leakage for a long time can cause the loss of equipment operation flexibility, reliability, have fallen sharply, failure rate increases, the dust caused by equipment surrounding environment deteriorate further, not easy checking and inspection workers found that equipment failure. Second, hoist the original seal structure characteristics improve tail department between shell and the cover plate is equipped with felt gasket, sealing components, such as rotary bearing support parts outside the shell, the tail seal assembly diagram as shown in figure 1. Figure 1 tail sealing assembly motioned the tail sealing structure is simple, convenient inspection, bearing fill lubricating oil is convenient, but also exist the following problems: ( 1) Seal assembly device installed on the shaft, shaft in the tail shell to fluctuate within a certain scope, felt gasket has the relative motion and sealing components, lead to external shell cover and seal plate ( 0235A) Between felt by the wear and tear. ( 2) Early felt seal installation for the whole center hole is installed in the tail shaft, equipment operation after a period of time, both relative wear, sealing function failure. ( 3) Felt seal on the seal plate and four top wire contact with the hoist shell, the sealing effect, looseness is not easy to master, and the equipment running vibration will make the wire wear and failure, the three conditions will lead to powder material overflow from the wear and tear. ( 4) Equipment wear and tear, late in the process to be returned to the factory installation requirements, the workload is increased, processing time is long, easy to damage the bearing, such as skeleton seal parts, and the effect is not very ideal. ( 5) Due to long run ash, dust will cause bearing lubrication failure, wear and tear, and trigger axis results in the decrease of its safety, maintenance cost increases, caused the accident. ( 6) Long term material accumulation, channeling gray axis wear, results in the decrease of its safety, increase maintenance costs, increase equipment accidents. Three, hoist within the new seal structure characteristics of hoist full sealed tensioning device as shown in figure 2 and figure 3. Figure 2 tail seal assembly diagram 3 ascend the tail device figure 2, the wear-resisting shaft sleeve by flat key fixed by bolt is fixed on the shaft, bearing and the tail slide use interference fit; Bearing shell and wear-resisting collar design for clearance fit and mutual movement; Two sets of slide through the socket head cap screw should be fixed on the tail box shell, the installation two weighted round on both ends of the shaft, shaft above the end adjustment screw and compression spring is used to implement the automatic tensioning. After improve confidential sealing structure has the following advantages: ( 1) A tail wheel all sealed within the hoist shell and the flange connection filling sealing material, completely solve powder overflow phenomenon. ( 2) Abrasion resistance and bearing shell with high chrome multielement alloy, and after heat treatment, greatly increased wear resistance, improve the service life, only need to regularly check the wear amount. ( 3) Wear-resisting replace bearing as the rotational support body, no lubrication, truly free maintenance, maintenance cost is dramatically lower than before. ( 4) Site after running grey problem solving, equipment surrounding environment health significantly improved, post checking and sharply lower labor intensity, realizing safety, environmental protection production. Four, the effect of hoist seal after the reform, and to eliminate the phenomenon of running the ash and meet the requirements of the scene of the production of environmental protection, clean, reduce the labor intensity of post workers. Position review is simple, without daily maintenance, regular examination, maintenance costs have fallen sharply, equipment reliability. Source: the journal cement, 2019