Method for controlling variable speed operation curves by low head mitergate hydraulic hoist

Abstract

The invention discloses a method for controlling variable speed operation curves by a low head mitergate hydraulic hoist, comprising: (1) connecting a computer with a hydraulic hoist; (2) setting a variable speed opening operation curve and a variable speed closing operation curve of the low head mitergate hoist in a computer; (3) controlling the operation time and the operation speed of the hydraulic hoist by the variable speed opening operation curve and the variable speed closing operation curve of the low head mitergate hoist. Controlling time and speed of the hydraulic hoist is carried out by using the variable speed operation curve of the hoist to satisfy the accurate variable speed opening and closing requirements of a navigation lock service gate, and the low head navigation lock can accurately determine closing and opening force on the premise of doing no model tests to fill the gap in China; the service gate has smooth operation, long service life and lowered maintenance cost under specified closing and opening time so as to avoid the phenomenon of big Marathi car, save power and improve economic benefit and social benefit.

Description

technical field [0001] The invention relates to a control method utilizing the variable-speed running curve of a gate hoist, belonging to the field of water transport engineering. Background technique [0002] The working gate of the ship lock, as the throat of the ship lock, works together with the valve, hoist, and water delivery system to overcome the water level difference between the upstream and downstream, so that the ship can pass the lock smoothly. As the key equipment to control the operation of the working gate of the ship lock, the hoist plays an important role in ensuring the safety of the ship lock operation. We know that the ship locks undertake quite a heavy task of water transportation. Some ship locks are opened more than 50 times a day on average. The gates operate so frequently. Once the opening and closing equipment fails, it will directly affect the normal operation of the ship locks, causing ships passing through the locks to be blocked. , the channel...

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Problems solved by technology

[0009] like image 3 Shown: At the end of the last century and the beginning of this century, my country began to use electric proportional pump speed regulation or frequency converter speed regulation on ship locks to achieve stepless speed change for gate opening and closing. It can not only achieve stepless speed change for gate opening and closing, but also It can greatly reduce the peak value of the resistance torque and the power of the motor, and make the operation of the gate more stable. However, in the design of the hydraulic hoist for most ship locks in my country, the resistance torque of the gate operation is obtained through physical model tests, so as to obtain a relatively Accurate gate hoist variable speed operating curve requires a lot of manpower, material and financial resources; or in order to save investment, generally do not do physical model tests, designers can only determine the gate hoist variable speed operating curve based on experience, accurate It also makes the selection of motor power unreasonable. According to the relevant formulas in the "Code for Design of Ship Lock Hoist", the power of the selected motor is very large. In actual use, there will be "big horse-drawn car "Phenomenon, energy waste is large

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