Core tip: common failures of spiral distributor of asphalt paver: (1) bearing failure at both ends of screw distributor. Generally due to the oil seal and dust jacket damage outside the bearing. The commercial concrete mortar enters into it, resulting in the failure of the screw distributor or the excessive resistance, which seriously damages the bearing. It is necessary to replace bearings, oil seals and dust seals, and add new lubricants.
Screw feeder fault
There are 4 reasons for the phenomenon of high oil pressure and non rotation when the screw distributor is used.
(1) the damage of the bearings at both ends of the spiral feeder. Generally due to the oil seal and dust jacket damage outside the bearing. The commercial concrete mortar enters into it, resulting in the failure of the screw distributor or the excessive resistance, which seriously damages the bearing. It is necessary to replace bearings, oil seals and dust seals, and add new lubricants.
(2) the chain is too long. When the chain is elongated to a certain extent, the chain teeth will be stuck by the chain case shell, so new lubricants should be replaced and replaced.
(3) damage to the planetary reducer. The screw feeder and chain box cover are removed and the active sprocket is turned. If it is not possible to rotate, only the driving wheel is removed to observe the damage of the planetary gear reducer. The damage is usually due to the poor machining quality of individual gears and gear rings.
(4) failure of hydraulic pump and hydraulic motor. If the hydraulic pump is damaged, the indication value of the hydraulic gauge is low; if the hydraulic motor is damaged, the indication value of the hydraulic gauge is also low, and the side of the damage is not action. The general assembly must be replaced by the above conditions
