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A control method of a hydraulic speed regulating system with manual automatic switching

A speed regulation system and control method technology, applied in the field of hydraulic system, can solve the problems of unreliable operation of hydraulic speed regulation system, trouble finding and troubleshooting, etc., and achieve the effects of neat appearance, reduction of leakage points, and easy installation.

Active Publication Date: 2021-08-13
DONGFANG ELECTRIC AUTOMATIC CONTROL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to solve the above-mentioned technical problems, the present invention proposes a control method of a hydraulic speed control system with manual automatic switching, which can effectively solve the problems of unreliable operation of the hydraulic speed control system and difficulties in finding and eliminating faults

Method used

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  • A control method of a hydraulic speed regulating system with manual automatic switching
  • A control method of a hydraulic speed regulating system with manual automatic switching
  • A control method of a hydraulic speed regulating system with manual automatic switching

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Embodiment 1

[0050] As the basic embodiment of the present invention, the present invention includes a control method of a hydraulic speed regulating system with manual automatic switching, including a main control hydraulic system, a pressure oil source 1, a two-position four-way switching solenoid valve 2, and a switch for monitoring the switching state. Pressure relay 1 3, pressure gauge 4, automatic switching hydraulic control reversing valve 5, manual switching valve 6, hydraulic signal output proportional valve 1 7 and hydraulic signal output proportional valve 2 8. The manual switching valve 6 is provided with oil port one, oil port two and oil port three.

[0051] Switching solenoid valve 2 adopts the structure of double electromagnets with position locking, which can avoid long-term charged operation of electromagnets. The P port of the switching solenoid valve 2 is connected to the pressure oil source 1, the T port is connected to the oil return, the output port A is connected to...

Embodiment 2

[0054] As a preferred embodiment of the present invention, with reference to the attached figure 1 , the present invention includes a control method of a hydraulic speed regulating system with manual automatic switching, including a pressure oil source 1, a two-position four-way switching solenoid valve 2, a pressure relay-3 for monitoring the switching state, a pressure gauge 4, an automatic switching Hydraulic control reversing valve 5, manual switching valve 6, hydraulic signal output proportional valve 1 7, hydraulic signal output proportional valve 2 8, guide vane servomotor 9, main pressure distribution valve 10, emergency stop solenoid valve 11, emergency stop hydraulic control Reversing valve 12, pressure relay 2 for monitoring shutdown 13, inspection ball valve 1 for inspection of hydraulic signal output proportional valve 1 14, inspection ball valve 2 for inspection of hydraulic signal output proportional valve 2 15, inspection switching solenoid valve 2 The maintena...

Embodiment 3

[0064] As another preferred embodiment of the present invention, the present invention includes a control method of a hydraulic speed regulation system with manual automatic switching, including a governor controller, a pressure oil source 1, a switching solenoid valve 2, an automatic switching hydraulic control Directional valve 5, manual switching valve 6, hydraulic signal output proportional valve 1 7, hydraulic signal output proportional valve 2 8, guide vane servomotor 9, main pressure distribution valve 10, emergency stop solenoid valve 11 and emergency stop hydraulic control reversing valve 12.

[0065] The main pressure distribution valve 10 is a three-position five-way slide valve structure, including an upper control chamber, a main valve spool and a lower control chamber. A spring is arranged in the lower control chamber, and the main pressure distribution valve 10 The switch chambers of ports A and B are respectively connected to the switch chambers of the guide va...

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Abstract

The present invention relates to the technical field of hydraulic systems, in particular to a control method of a hydraulic speed regulating system with manual automatic switching. The output port of the hydraulic signal output proportional valve 2 is connected with the upper control chamber of the main pressure distribution valve, cooperates with the spring in the lower control chamber of the main pressure distribution valve, controls the main valve spool to move up and down, and controls the opening and closing of the guide vane servomotor. closure. Through the control method, the problems of unreliable operation of the hydraulic speed regulating system and difficulties in finding and eliminating faults can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of hydraulic systems, in particular to a control method of a hydraulic speed regulation system with manual automatic switching. Background technique [0002] Hydraulic control technology has been widely used in various industries, and its application in the control field of hydropower industry is also very common. As an important adjustment, control and application occasion, the hydropower industry has very high requirements on the reliability of the speed regulating hydraulic system. At present, many hydropower stations, which are used for peak regulation and frequency regulation tasks in large-scale power grids, require the solenoid valves (generally proportional valves) that output important hydraulic control signals to adopt a redundant parallel design and be able to realize when the main solenoid valve appears. It can reliably switch to another backup valve in case of failure. [0003] In the existing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02F15B20/00
CPCF15B13/02F15B20/008F15B2013/0409F15B2211/60F15B2211/8636F15B2211/8757F15B2211/895
Inventor 王志力朱廷忠陈智勇吕波贾小平
Owner DONGFANG ELECTRIC AUTOMATIC CONTROL ENG CO LTD
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