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Water turbine cylinder valve machine electrohydraulic control system with function of runaway turnoff

A technology that shuts down functions and controls systems, and is used in hydroelectric power generation, machine/engine, renewable energy power generation, etc., and can solve problems such as application limitations

Inactive Publication Date: 2010-01-13
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electro-hydraulic synchronous control system has small field space, low noise, and controllable movement speed, but because the system cannot work when the power is off, its application is also limited

Method used

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  • Water turbine cylinder valve machine electrohydraulic control system with function of runaway turnoff

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Embodiment Construction

[0015] In order to further illustrate the principle and structure of the present invention, a detailed description will be given below through embodiments in conjunction with the accompanying drawings.

[0016] The electro-hydraulic synchronous control system of the hydraulic turbine cylinder valve consists of three parts: a control valve group (as I in the figure), N synchronous shunt motors (as II in the figure) and N oil distribution modules (as III in the figure) composition. The shunt motor adopts a radial plunger type, which divides the hydraulic oil to ensure that the amount of oil in and out of each servomotor hydraulic cylinder is basically equal.

[0017] The control valve group consists of electro-hydraulic proportional directional valve 2, balance valve 3, one-way pressure reducing valve 4, initial start solenoid valve 5, hydraulic reversing valve 6, overflow valve 7, manual reversing valve 8 and runaway hydraulic reversing Valve 9, accumulator 10, shuttle valve 11 con...

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Abstract

The invention discloses a water turbine cylinder valve machine electrohydraulic control system with a function of runaway turnoff, which consists of a control valve assembly, flow-dividing motors and oil distributing modules; wherein, the output of the control valve assembly is respectively connected with N synchronous flow-dividing motors and corresponding N oil distributing modules; a servomotor is respectively connected on the tail end of each oil distributing module as an executive device of a hydraulic system; the flow-dividing motor is radial plunger type and carries out flow dividing on hydraulic oil to ensure that the input and output oil amount of each servomotor hydraulic cylinder are equal, meanwhile, the oil distributing module is provided with two fine adjustment and rough adjustment electromagnetism ball valves to ensure that the synchronous control of corresponding servomotor meets the requirement of designing through accurately controlling flow entering into the servomotor by PLC. The invention can control the speed of the servomotor by controlling the flow of an electro-hydraulic proportional direction valve to realize hydraulic-electric synchronous and speed control with high precision, and a machine unit can be turned off immediately under the combined action of an over-speed protection device and a control system with the function of runaway when the machine unit is over speed.

Description

Technical field [0001] The invention belongs to the electro-mechanical-hydraulic integrated control technology, and specifically relates to a multi-hydraulic cylinder cooperative drive electro-hydraulic control system, in particular to a hydraulic turbine drum valve electro-hydraulic control system with a runaway closing function for opening and closing of a hydraulic turbine drum valve. Background technique [0002] As a kind of disconnect valve, the cylinder valve is installed between the fixed guide vane and the movable guide vane of the turbine. Due to the large diameter and mass of the cylinder valve, its opening and closing are completed by multiple actuators. Because the body structure needs to move horizontally and steadily during the operation of the cylinder valve, and the card issuance cannot occur, a reliable synchronization system is required to ensure the synchronized operation of multiple actuators. At present, the synchronous movement mode adopted by the cylinder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B15/18
CPCY02E10/226Y02E10/20
Inventor 王国栋肖聚亮靳光永洪鹰宋伟科
Owner TIANJIN UNIV
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