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.

Active Publication Date: 2020-08-28
DONGFANG ELECTRIC AUTOMATIC CONTROL ENG CO LTD +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] When the power plant needs to select the power-down protection function of the governor according to whether the power grid assesses abnormal shutdown accidents, it cannot flexibly switch the power-down shutdown of the governor and the self-maintaining function of the governor on-line

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A self-maintaining and self-closing method for a speed governor when it is powered off

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a governor power-down self-holding and self-closing method, and belongs to the technical field of hydraulic generators. The governor power-down self-holding and self-closing method is characterized by comprising the following steps that a, a governor power-down self-holding and self-closing device is connected with a governor of a hydraulic turbine; b, if a power plant selects the power-down closing function of the governor, power is supplied from the b end of a double-coil electromagnetic directional valve and the a end of a single-coil electromagnetic directional valve in the governor power-down self-holding and self-closing device; when the governor is powered down, a main distributing valve moves downwards under the action of constant pressure oil to stop a unit; and c, when the governor is powered down, the double-coil electromagnetic directional valve is kept at an a-end station, the single-coil electromagnetic directional valve is kept at a spring cavitystation, and the unit is kept at the current position. According to the governor power-down self-holding and self-closing method, under the condition of sudden power loss of the governor, whether theunit is kept at the current position or is directly stopped can be selected, so that the fast switching between the power-down stop of the governor and the power-down self-holding function of the governor is realized, and the operation is flexible and convenient.

Description

technical field [0001] The invention relates to the technical field of hydroelectric generators, in particular to a method for self-maintaining and self-closing of a speed governor when power is off. Background technique [0002] The turbine governor is the key equipment to ensure the long-term safe and stable operation of the hydro-generator set. In recent years, with the rapid development of the power industry, the degree of automation of the unit has become higher and higher. The speed control system, especially the operation of the unit The safety requirements are also getting higher and higher, and the power grid's assessment of abnormal shutdown of generator sets is becoming more and more stringent. According to the different conditions of different units, some power plants require the governor to shut down automatically when the power is off, and some power plants require the governor to remain at the current position when the power is off. It is difficult for the sp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): F03B15/02
CPCF03B15/02Y02E10/20
Inventor 陈智勇贾小平
Owner DONGFANG ELECTRIC AUTOMATIC CONTROL ENG CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap