1 Reamer head structure
Reamer head is an important dredging part of the suction dredger, installed in the forefront of the reamer frame. It consists of reamer seat, reamer blade composition, in the tooth reamer and equipped with removable (replacement) of the "teeth" some of the three into one). Reamer seat more for cast steel or cast steel welding combination, blade and teeth for wear-resistant alloy steel or manganese steel and other systems, reamer head and drive shaft connection, the blade is generally 4 ~ 6 pieces, into a spiral installed in the reamer seat. The combination of reamer and reamer shaft is shown in Fig. 1.4.2-1 to Fig. 1.4.2-3.
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2 The role and requirements of the reamer
1. The role of the reamer in the rotation.
(1) can cut the riverbed soil, make it deformed and broken.
(2) make the broken soil (sand, stone) and water mixed, sent to the suction port.
2. The reamer design to meet the following requirements.
(1) can dig a variety of soil, such as mud, sand, clay, sand, gravel, rocks, etc.; (2) can cut, but also crushed to ensure that the soil (sand and stone) and water can be mixed to the maximum extent; (3) the minimum leakage, suction resistance and the possibility of causing clogging is small; (4) the minimum required cutting power; (5) the boat is designed to meet the following requirements.
(5) ship in different working conditions, the reamer and winch, mud pumps and other good match; (6) structure of the ship.
(6) simple structure, easy to manufacture and disassemble, easy to repair after wear and tear, long life.
The above points are often mutual constraints, the design should be based on specific conditions have to choose, in order to achieve the unity of the contradiction. The general reamer is designed according to different soil quality and different optimal digging depth, some ships are equipped with more than one reamer to adapt to a variety of different working conditions.
