Hob trailing head trailing suction hopper dredger driven by outer-rotor motor

Abstract

The invention provides a hob trailing head trailing suction hopper dredger driven by an outer-rotor motor. The trailing suction hopper dredger includes a hob trailing head, the hob trailing head is connected with a ship body through a trailing arm, and the hob trailing head includes a trailing head fixing body, a trailing head moving shield, a cylinder with trailing teeth, an outer-rotor motor, ahydraulic device, and a high-pressure washing bent pipe. The trailing head fixing body is connected with the moving shield in a rotating mode, the high-pressure washing bent pipe is arranged above thetrailing head fixing body, the cylinder with trailing teeth is fabricated below the moving shield, the cylinder with trailing teeth includes a cylinder, a tooth seat, and trailing teeth, and the cylinder is internally provided with the outer-rotor motor in a sealing mode. Stators and rotors drive the cylinder to rotate around a horizontal shaft, and whole cylinder with trailing teeth is connectedwith the trailing head moving shield in a rotating mode, and can follow the moving shield to rotate within a certain angle range relative to the trailing head fixing body. According to the trailing suction hopper dredger, the weight of a trailing head can be effectively controlled, axial constraint accessories can be reduced, and the effective cutting width can be improved so that groundbreakingcapacity of the trailing head of a dredger and the operation efficiency of dredging hard soil can be improved significantly.

Description

technical field [0001] The invention belongs to the technical field of trailing suction dredgers used in dredging engineering construction operations, and in particular relates to a trailing suction dredger with a hob head driven by an external rotor motor and its use in deep water hard Dredging method for soil cutting. Background technique [0002] Trailing suction dredgers and cutter suction dredgers are the two most widely used dredging construction ships. Among them, the trailing suction dredger is flexible, strong in wind and wave resistance, and has a wide range of operating water depths. During operation, the rake head connected to it is put into the water through the rake arm, and the ship sails through the rake arm to drag the rake head to cut the soil layer. The dredged material is sucked into the fixed body of the rake head and transported to the mud hopper by the rake pipe in the rake arm. [0003] figure 1 Shown is a schematic diagram of the main components o...

AI Technical Summary

Problems solved by technology

In addition, the shaft diameter of the driving system with this driving capacity is larger than the diameter of the drum with rake teeth, which makes it difficult for the rake teeth to cut into or cut medium hard soil, the dredging efficiency is limited, and the expected operating efficiency cannot be achieved

[0007] (2) A larger drive system will also cause the support structure connected to the drum shaft to account for a larger proportion of the horizontal axis of the drum, and the actual width of the hob involved in cutting only accounts for 50% to 60% of the design size of the horizontal axis of the drum, reducing the Improve the operating efficiency of the hob harrow head

[0010] It can be seen that a well-designed reducer must make the gearbox occupy the horizontal axial dimension of the drum, resulting in reduced excavation efficiency

[0011] (3) The equipment technology of underwater reducers in the range of 20-60m in water depth is still immature, and there are no serialized products to choose from. It is very difficult to control the reliability of customized products and the supply link, and the frequency of fault maintenance in the use link will also increase. multiplied

[0012] Therefore, it is necessary to design a new type of trailing suction dredger, whose rake head can improve the soil breaking ability and construction efficiency of the trailing suction dredger, so as to solve the problem of operating efficiency of hard soil dredging

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