Submarine guide pulley of evator-ladder dredge

Abstract

The invention relates to an underwater guide wheel of bucket dredge, which arranges a square fixing base on the water-through hole of the end of guide wheel shaft. The square fixing base is mounted inside the lowest square groove of beam; a sand-baffle surface is arranged on the inner side surface of fixing base along the circumference; a annular chamber is arranged at the inner side of sand-baffle surface; several washing sand-baffle sheathes of small holes are arranged along the circumference near the end cover of annular chamber, whose end surface and the water guide groove of bearing end cover can form the washing system with outlet sealing line; and the inner chamber of guide wheel is filled by machine oil. The invention utilizes water sealing technique, and oil sealing technique, with simple structure and the application to effectively avoid sand entering guide wheel bearing to prolong its service life.

Description

technical field [0001] The invention relates to a dredging ship, in particular to the improvement of the underwater guide wheel structure of a chain bucket type dredging and sand mining ship. Background technique [0002] The underwater guide wheel is located at the lowest position of the bucket chain of the chain bucket dredger (sand dredger). The normal excavation depth is generally about 10 to 20 meters, even up to 30 meters. The underwater pressure is between 0.1mpa and 0.3mpa. between. When excavating, the underwater guide wheel rotates with the excavation and lifting of the sand bucket. The sand bucket continuously excavates the underwater material layer, continuously raises fine sand, small aggregates and silt, and continuously encounters the material layer during excavation. The landslide covers the entire underwater guide wheel, so that the entire guide wheel is surrounded by sand and gravel. At the same time, the underwater guide wheel also has to bear the diggin...

AI Technical Summary

Problems solved by technology

[0004] 1. The water pipe layout adopts a section of open pipe that is easily broken by sand and stones, resulting in failure of the flushing seal

[0005] 2. The oil supply pipe of the grease pump is 20 meters to 30 meters long, which is easy to cause pipe blockage

[0006] 3. It adopts two sand-proof structures of continuous oil injection and water flushing. The internal and external structures of the bearing seat are complicated. Once the sliding bearing is worn out, the axis deviation will cause the sealing line to be too large. The sealing effect will obviously decrease, and the vicious cycle of easier wear will shorten the underwater guide wheel life span

[0009] 6. The sealed sand control device is heavy and difficult to disassemble and maintain

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