LUBRICATION SYSTEM OF CONCRETE MACHINERY AND CONCRETE MACHINERY

摘要

A lubrication system of concrete machinery and concrete machinery. The lubrication system has a bearing (27) and a rotary shaft (28) fitted with each other and both contacting concrete. The bearing (27) has a seal component (21) at two ends. The seal component (21), the bearing (27) and the rotary shaft (28) form a seal cavity. The seal cavity is divided by a partitioning seal component (22) between the bearing (27) and the rotary shaft (28) into a bearing cavity (24) and a protection cavity (23) located at an end portion of the bearing (27). The protection cavity (23) is in communication with a high-pressure medium pipeline through a high-pressure medium passage (26) on the bearing (27); the bearing cavity (24) is in communication with a lubricating oil pipeline through a lubricating oil passage (25) on the bearing (27). The pressure of the medium in the protection cavity (23) is higher than the pressure of the external concrete. The lubrication system prevents the concrete from entering the seal cavity, reduces the abrasion of the concrete on the bearing (27), reduces the lubricating oil usage and the impact of the lubricating oil on the strength of the concrete. Also provided is concrete machinery equipped with the lubrication system.