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Stepless speed varying control method and system for hydraulic on/off machine with high pressure and great flow rate

A hydraulic hoist and continuously variable speed technology, which is applied in water conservancy projects, sea area projects, coastline protection, etc., can solve problems such as unstable operation process, high energy consumption of the system, and inability to adapt to high pressure and large flow conditions. Achieve high practical value

Inactive Publication Date: 2005-12-14
SHANGHAI HAIYUE HYDRAULIC ELECTROMECHANICAL ENG COOP
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AI Technical Summary

Problems solved by technology

[0002] The transmission methods of the existing hoist mainly include mechanical and hydraulic. The mechanical hoist has a large structure, occupies a large space, and the operation process is not stable, while the existing hydraulic hoist cannot adapt to the working conditions of high pressure and large flow. Requirements, unable to achieve continuously variable speed requirements, high energy consumption of the system, serious internal leakage

Method used

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  • Stepless speed varying control method and system for hydraulic on/off machine with high pressure and great flow rate

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Embodiment Construction

[0029] According to the drawings, P is the pump source interface, T is connected to the oil tank 6, A port is connected to the rod chamber of the oil cylinder, that is, the lower chamber, B is connected to the rodless chamber of the oil cylinder, that is, the upper chamber, and L is the pilot oil drain port.

[0030] The hydraulic control circuit of the water delivery valve hoist is composed of a motor pump unit and a four-way control circuit composed of two-way cartridge valves:

[0031] The motor pump unit is rigidly connected by the motor 7 and the electro-hydraulic proportional variable pump 5 through a coupling and a bell;

[0032] The four-way control circuit is connected by 1-1, 1-2, 1-3, 1-4, 1-5, 1-6 of the two-way cartridge valve assembly through the oil circuit block 8, and each assembly is connected to the electromagnetic switch respectively. Directional valves 2-1, 2-2, 2-3, 2-4, 2-5, 2-6, at the same time, the pressure of the two-way cartridge valve 1-1 is contro...

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Abstract

The stepless speed varying control method for hydraulic on / off machine with high pressure and great flow rate in huge navigation lock, such as that in Yangtze Gorges hydro complex, is used mainly in controlling the water conveying valve, and features that one high pressure and great flow electro-hydraulic proportion plunger pump is used as the basic element combined with the integrated control structure of two-way inserted valve based on 'fluid lock theory' to constitute the stepless speed varying control on the water conveying valve and the A-shaped gate of the huge navigation lock. The control system has water conveying valve on / off machine hydraulic control loop comprising motor-pump combinations and two-way inserted valve. The present invention has accurate and reliable control and smooth running in controlling the great inertia load of the permanent navigation lock, and excellent steady and dynamic characteristics.

Description

1. Technical field: [0001] The invention relates to a valve hoist, more specifically a high-pressure, large-flow stepless speed control method and system for a hydraulic hoist, which is applied to water conservancy and hydropower ship locks such as the permanent ship locks of the Three Gorges Water Conservancy Project on the Yangtze River. 2. Background technology: [0002] The transmission methods of the existing hoist mainly include mechanical and hydraulic. The mechanical hoist has a large structure, occupies a large space, and the operation process is not stable, while the existing hydraulic hoist cannot adapt to the working conditions of high pressure and large flow. Requirements, unable to achieve continuously variable speed requirements, the system consumes a lot of energy, and the internal leakage is serious. (See the design of the hydraulic control system for ship locks and valve hoists in Jiangsu Communications Engineering, Phase 1 (Phase 89) in 2000). 3. Content...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B7/40
Inventor 毛武荣张国贤黄人豪吴白羽胡伟民唐立周海勇
Owner SHANGHAI HAIYUE HYDRAULIC ELECTROMECHANICAL ENG COOP
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