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Intelligent compound control system for thermal keying installation for magnetic yoke of rotor of large hydrogenerator

A hydro-generator and composite control technology, applied in the direction of manufacturing stator/rotor body, etc., can solve the problems of uneven temperature inside and outside the yoke, large error, long cycle and so on

Inactive Publication Date: 2012-11-14
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heating methods include copper loss method, iron loss method and electric heating method, etc.; in terms of control method, the heating process is manually operated according to past experience. If the heating rate is too fast, the inner and outer temperatures of the yoke will be uneven when heated and expand, resulting in internal stress. If the heating rate is too slow, the cycle will be too long and the work progress will be prolonged; the method of measuring the gap increment is to use measuring tools to measure manually, and the error is large

Method used

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  • Intelligent compound control system for thermal keying installation for magnetic yoke of rotor of large hydrogenerator
  • Intelligent compound control system for thermal keying installation for magnetic yoke of rotor of large hydrogenerator
  • Intelligent compound control system for thermal keying installation for magnetic yoke of rotor of large hydrogenerator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1, combining figure 1 , figure 2 , image 3 , The hot-keying installation of the rotor yoke of the large-scale hydroelectric generator of the present invention is composed of a heat-insulating shell (8), a yoke assembly (30), a yoke key (13) and a rotor arm assembly (31). The housing (8) is connected with the yoke assembly (30), the yoke assembly (30) is connected with the yoke key (13), and the yoke key (13) is connected with the rotor arm assembly (31).

[0027] The hot-keyed installation of the rotor yoke of the large-scale hydroelectric generator of the present invention has the following technical features:

[0028] The thermal insulation shell (8) includes an aluminum silicate thermal insulation layer (7), an industrial furnace temperature measuring platinum resistor (9), an air supply duct (10) and a hot air blower (11), and an aluminum silicate thermal insulation layer (7) Located inside the heat preservation shell (8), the hot air blower (11) is connected w...

Embodiment 2

[0037] Example 2, combining Figure 1-Figure 7 , The present invention consists of a thermal insulation shell (8), an aluminum silicate thermal insulation layer (7), a hot air blower (11), an air supply duct (10), an industrial furnace temperature measurement platinum resistance (9), and a rotor arm temperature measurement platinum resistance (2) Ambient temperature temperature measurement platinum resistance (1), spray solenoid valve (16), spray pipe (3), nozzle (15), laser rangefinder (5), laser rangefinder mounting plate (6) ), laser reflector (4), electric bell (17), small DCS system (18) and special software. The specific working process is as follows:

[0038] 1. The working process of the hardware under the function of special software: the closed type magnetic yoke (12) is composed of the thermal insulation shell (8), the aluminum silicate thermal insulation layer (7), the hot air blower (11), and the air supply pipe (10). For the heated industrial furnace, the temperat...

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Abstract

The invention aims at providing an intelligent compound control system for thermal keying installation for a magnetic yoke of a rotor of a large hydrogenerator, which automatically executes heating process stipulations so as to realize a full-automatic thermal keying installation process. A thermal keying installation device for the magnetic yoke of the rotor of a large hydrogenerator is composed of a heat-insulating shell, a magnetic yoke assembly, a magnetic yoke key and a rotor support arm assembly, wherein the heat-insulating shell is connected with the magnetic yoke assembly, the magnetic yoke assembly is connected with the magnetic yoke key, and the magnetic yoke key is connected with the rotor support arm assembly. The intelligent compound control system for thermal keying installation for the magnetic yoke of the rotor of the large hydrogenerator provided by the invention is composed of an input system, a small DCS (distributed control system), an air heater, a water spray electromagnetic valve and an electric bell, wherein the input system is connected with the small DCS system, and the small DCS system is connected with the air heater, the water spray electromagnetic valve and the electric bell. Under the control of the small DCS system, the 'temperature rise speed' and 'clearance increment' specified by the heating process are automatically executed, thus changing the current situations of manual operation of a heating process and manual measurement using measuring tools, and realizing the full-automatic thermal keying installation process.

Description

(1) Technical field [0001] The invention relates to hydroelectric power generation technology, in particular to an intelligent control system for hot keying installation of a large-scale hydroelectric generator rotor yoke. (2) Background technology [0002] The rotor of a large hydroelectric generator has a large diameter and can weigh several hundred tons. Due to transportation restrictions, large components such as the yoke on the rotor must be installed on site. The yoke is composed of several 3--4mm thick steel sheets, which concentrate more than 2 / 3 of the weight of the generator rotor. Therefore, the centrifugal force generated by the yoke is huge during operation of a large hydro-generator, which can reach Nearly 10,000 tons. Therefore, when the yoke is installed, the yoke keying method is used to pre-tighten the yoke and the rotor arm, so that the radial expansion of the yoke and the rotor arm can meet the needs of safe operation of the unit. The yoke keying is divided...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K15/03
Inventor 薛荆岩刘丽英邢邵谦薛畅
Owner HEILONGJIANG UNIV
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