A method for adjusting the electrical neutral position of the main pressure distribution valve of a governor and the proportional valve neutral position

A technology of main pressure distribution valve and proportional valve, which is applied in the direction of hydroelectric power generation, machine/engine, safety device, etc. It can solve the problems of frequent movement of the guide vane of the main pressure distribution valve of the governor, so as to avoid partial opening or partial closing, Guarantee the effect of stable operation

Active Publication Date: 2019-03-12
CHINA YANGTZE POWER
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for adjusting the neutral position of the main power distribution of the governor and the neutral position of the proportional valve, which is suitable for the use of proportional valves (or redundant configurations such as proportional valves + stepping motors) and main distribution, relay, etc. As a hydroelectric unit with an executive structure, it can solve the problem of frequent actions of the governor's main pressure distribution valve and guide vanes

Method used

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  • A method for adjusting the electrical neutral position of the main pressure distribution valve of a governor and the proportional valve neutral position

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Embodiment Construction

[0034] A method for adjusting the electrical neutral position of the main pressure distribution valve of a governor and the proportional valve neutral position, which is characterized in that it includes the following steps in sequence:

[0035] Adjust the neutral position of the main pressure distribution valve;

[0036] Preliminary adjustment of the zero point of the neutral position sensor of the main pressure distribution valve;

[0037] The zero point and full point adjustment of the main sensor of the guide vane;

[0038] The center position sensor of the main pressure distribution valve and the center position of the proportional valve are finely adjusted.

[0039] Preferably, the neutral adjustment of the main pressure distribution valve includes the following steps:

[0040] Step 1: Adjust the main pressure distribution valve spool thread to adjust the neutral position of the main pressure distribution valve, and then observe whether the position of the guide vane c...

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Abstract

A method for adjusting a main control valve electric middle position and a proportional valve middle position for a speed controller sequentially comprises the following steps of adjustment of the main control valve middle position, initial adjustment of the zero point of a main control valve middle position sensor, adjustment of the zero point and full point of a guide vane main connecting sensor, and fine adjustment of the main control valve middle position sensor and the proportional valve middle position. According to the method provided by the invention, electrical middle position adjustment is free from the dependence on a machinery middle position, and even though adjustment of the machinery middle position is not suitable, the machinery middle position can be kept in a suitable position through adjustment of the method provided by the invention.

Description

technical field [0001] The invention relates to the technical field of water turbines, in particular to a method for adjusting the neutral position of a governor main distribution circuit and a proportional valve neutral position. Background technique [0002] At present, the adjustment of the main mechanical neutral position of the turbine governor is usually to adjust the main matching spool to a certain position in the middle of the oil port of the switch cavity of the valve sleeve (the field is called the cover range), as long as the oil port of the valve core is not in contact with the oil port of the valve sleeve. If it is connected, it is considered qualified. Set the electrical neutral sampling value at this time to the electrical neutral sampling channel as the zero point, even if the adjustment of the electrical neutral is completed, and the proportional valve neutral usually does not change the setting. This method has the following problems: [0003] 1. The adju...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03B15/04
CPCF03B15/04Y02E10/20
Inventor 常中原孔丽君邓勇涂勇李初辉
Owner CHINA YANGTZE POWER
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