A self-maintaining and self-closing method for a speed governor when it is powered off
A speed governor, self-maintaining technology, applied in hydroelectric power generation, machine/engine, safety device, etc.
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Embodiment 1
[0043] A power-down self-holding and self-closing method for a governor, comprising the following steps:
[0044] a. Connect the power-off self-holding and self-closing device of the governor to the governor of the turbine;
[0045] b. The unit is running normally. If the power plant chooses the power-off shutdown function of the governor, the b-side of the double-coil electromagnetic reversing valve 6 in the self-maintaining self-closing device of the governor will be energized, and the single-coil electromagnetic reversing Terminal a of valve 5 is energized; when the governor is powered off, the double-coil electromagnetic reversing valve 6 remains at the position of end b, and when the single-coil electromagnetic reversing valve 5 is powered off, it returns to the spring cavity under the action of spring reset Station, chamber a of the differential pressure hydraulic control directional valve communicates with the oil return through the single-coil electromagnetic direction...
Embodiment 2
[0049] A power-down self-holding and self-closing method for a governor, comprising the following steps:
[0050] a. Connect the power-off self-holding and self-closing device of the governor to the governor of the turbine;
[0051] b. The unit is running normally. If the power plant chooses the power-off shutdown function of the governor, the b-side of the double-coil electromagnetic reversing valve 6 in the self-maintaining self-closing device of the governor will be energized, and the single-coil electromagnetic reversing Terminal a of valve 5 is energized; when the governor is powered off, the double-coil electromagnetic reversing valve 6 remains at the position of end b, and when the single-coil electromagnetic reversing valve 5 is powered off, it returns to the spring cavity under the action of spring reset Station, chamber a of the differential pressure hydraulic control directional valve communicates with the oil return through the single-coil electromagnetic direction...
Embodiment 3
[0056] A power-down self-holding and self-closing method for a governor, comprising the following steps:
[0057] a. Connect the power-off self-holding and self-closing device of the governor to the governor of the turbine;
[0058]b. The unit is running normally. If the power plant chooses the power-off shutdown function of the governor, the b-side of the double-coil electromagnetic reversing valve 6 in the self-maintaining self-closing device of the governor will be energized, and the single-coil electromagnetic reversing Terminal a of valve 5 is energized; when the governor is powered off, the double-coil electromagnetic reversing valve 6 remains at the position of end b, and when the single-coil electromagnetic reversing valve 5 is powered off, it returns to the spring cavity under the action of spring reset Station, chamber a of the differential pressure hydraulic control directional valve communicates with the oil return through the single-coil electromagnetic directiona...
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