Vertical screw constant speed conveying system and method for ship unloader

Abstract

The invention discloses a vertical spiral stable speed feeding system and method for a ship unloader, comprising a feeder, a screw conveyor, a hydraulic motor, a hydraulic oil pump, a screw speed sensor, a conveying controller, a frequency converter, The sensor is used to detect the speed of the screw conveyor; the conveying controller is used to receive the detected speed signal, compare it with the target speed, and output the control signal; the frequency converter is used to receive the control signal, and control the motor speed of the hydraulic oil pump to maintain the target speed. Within the deviation range, it can avoid the speed drop caused by internal leakage, prevent the torque load from increasing and hold the machine, and ensure the output.

Description

technical field [0001] The invention belongs to the material conveying technology of a ship unloader, and in particular relates to a vertical screw constant-speed material conveying system and method for a ship unloader. Background technique [0002] The existing vertical screw conveying system of screw ship unloader has the following disadvantages: [0003] 1. A screw machine directly driven by a motor has a heavy structure, and it is easy to burn the motor and damage the structure under overload conditions; [0004] 2. The other is a hydraulically driven screw machine, which has a light structure and good operability. However, after the load is loaded, the internal leakage increases and the speed decreases, resulting in a decrease in output and an increase in torque load. [0005] In addition, foreign material delivery systems generally use hydraulic proportional pump technology. Imported hydraulic proportional pumps are very expensive, while domestic proportional pumps c...

AI Technical Summary

Problems solved by technology

[0003] 1. A screw machine directly driven by a motor has a heavy structure, and it is easy to burn the motor and damage the structure under overload conditions;

[0004] 2. The other is a hydraulically driven screw machine, which has a light structure and good operability. However, after the load is loaded, the internal leakage increases and the speed decreases, resulting in a decrease in output and an increase in torque load.

[0005] In addition, foreign material delivery systems generally use hydraulic proportional pump technology. Imported hydraulic proportional pumps are very expensive, while domestic proportional pumps cannot meet the requirements for use. At the same time, because auxiliary pumps are required, the cost increases

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