AUTOMATED DEVICE FOR MONITORING THE STATOR CORE OF POWERFUL TURBOGENERATOR

A device for automated control by the stator core of a powerful turbine generator (TG) during assembly and pressing at the manufacturing plant is proposed. Using the device, places in the core with a weakened solidity are determined. For this, at N points evenly spaced along the cross section of the stator core, the specific pressing pressure of special plastic elements, which are installed in the control cells of the additional pressure ring of the press, on which the core is assembled, is measured. During pressing, the elements are deformed, and their deformation depends on the degree of core defect (decrease in solidity) in the zone of which they are located. The sample will be deformed less, located in the zone of the largest defect, and most of all - in the zone where the defect is minimal. The pressure is measured using a flat metal membrane with a rigid center on which strain gauges are located at selected points. It is shown that the relative deformations in a flat membrane, which are measured by strain gages, depend on the value of the specific pressing pressure. Analytical relationships between the relative radial and tangential deformations and the specific pressing pressure have been determined. References 20, figures 5.

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Robust interconnected automated control system for improving reliability of the turbine-generator unit shaft in food industry enterprises

Resource and Energy Saving Technologies of Production and Packing of Food Products as the Main Fundamentals of Their Competitiveness: Proceedings of the 7th International Specialized Scientific and Practical Conference, September 12, 2019. Kyiv, NUFT, 2019 ◽

10.24263/res-2019-4 ◽

2019 ◽

Author(s):

Serhii Baliuta ◽

Valerii Kuievda ◽

Iuliia Kuievda

Keyword(s):

Control System ◽

Food Industry ◽

Turbine Generator ◽

Automated Control ◽

Automated Control System ◽

Generator Unit

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Introduction

Networking Knowledge: Journal of the MeCCSA Postgraduate Network ◽

10.31165/nk.2007.11.6 ◽

2007 ◽

Vol 1 (1) ◽

Author(s):

Line Thomsen

Keyword(s):

Mass Media ◽

Theoretical Models ◽

Core Values ◽

The Other ◽

Media Convergence ◽

The Core ◽

The Press ◽

The Media

What is journalism? How does it exist and why? How does journalism define itself and in what ways can we make use of looking theoretically at the practice of it? These were the central themes of our workshop; Theoretical Models as Mass Media Practice held at the ‘Minding the Gap’ conference at Reuters Institute in May 2007, from which this collection of papers has been selected. As with the other workshops during the conference, the majority of our panellists were themselves once media practitioners. It is my opinion that this background and inside knowledge of the field in itself can provide an exceptional framework for understanding the workings of mass media while helping the press reflect over these workings too. In a time of change for the journalistic profession, when media convergence is growing; the media is marked by deregulation and fewer journalists are being asked to do more, there is an increased need for the profession to get involved in debating the core values of its existence.

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Introduction

The Rising Clamor ◽

10.5810/kentucky/9780813177373.003.0001 ◽

2019 ◽

pp. 1-12

Author(s):

David P. Hadley

Keyword(s):

Cold War ◽

National Security ◽

The Core ◽

The Press

The introduction examines the overall questions animating the core work. Using Director of Central Intelligence William E. Colby’s explanation of how opinion shaped CIA activity, it explores how the CIA both was influenced by the press and sought to influence the press to shape the environment in which it operated. The introduction also explores the previous understandings of how the press and the CIA interacted and disputes a persistent theory originated by Deborah Davis that there existed a program called Mockingbird designed by the CIA to manipulate the press. It argues also that, in addition to Cold War–related activities, the CIA was interested in the press as a way to promote its reputation and establish its security within the national security bureaucracy.

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Multiple Fault Detection and Isolation Using the Haar Transform, Part 2: Application to the Stamping Process

Journal of Manufacturing Science and Engineering ◽

10.1115/1.2831219 ◽

1999 ◽

Vol 121 (2) ◽

pp. 295-299 ◽

Cited By ~ 24

Author(s):

C. K. H. Koh ◽

J. Shi ◽

W. J. Williams ◽

J. Ni

Keyword(s):

Sheet Metal ◽

Fault Detection And Isolation ◽

Strain Gages ◽

Process Variables ◽

Multiple Fault ◽

The Press ◽

Exclusive Sets ◽

Detection Schemes ◽

Current Detection

The sheet metal drawing operation is a complex manufacturing process involving more than forty process variables. The intricate interaction among these variables affect the forming tonnage which is measured by strain gages mounted on the press. A fault is said to occur when any of these process variables deviate beyond their specified limits. Current detection schemes based on thresholding do not fully exploit the information in the tonnage signals for the detection and isolation of multiple fault condition. It is thus an excellent case study for demonstrating the implementation of the detection methodology presented in Part 1. By partitioning the tonnage signature into disjoint segments, mutually exclusive sets of Haar coefficients can be used to isolate faults in each stage of the process.

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The Press Powder Technological Parameters Optimization in Wall Ceramics Production by the Semi-Dry Pressing Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.974.419 ◽

2019 ◽

Vol 974 ◽

pp. 419-423

Author(s):

Victoria Gurieva ◽

A.V. Doroshin

Keyword(s):

Raw Materials ◽

Parameters Optimization ◽

Pressing Pressure ◽

Technological Parameters ◽

Press Powder ◽

Pressing Method ◽

Ash And Slag Waste ◽

Fundamental Possibility ◽

The Press ◽

Dry Pressing

The paper presents the fundamental possibility of using ash and slag waste (ASW) of the fuel and energy complex in the production of ceramic bricks using the semi-dry pressing method based on the Buguruslan deposit low-melting aluminosilicate loams. The technological parameters optimization ways (molding moisture, grinding fineness, pressing pressure) in the production of ceramic bricks from low-quality clay raw materials using the experiment mathematical planning method are presented. The separate and joint grinding raw materials mixture rational composition influence on the ceramics technological properties is studied.

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Rewind and Core Restack of AEP Conesville #5 Generator

ASME 2004 Power Conference ◽

10.1115/power2004-52145 ◽

2004 ◽

Author(s):

J. Timperley ◽

J. Michalec ◽

W. Moore ◽

H. Moudy ◽

J. Hutt

Keyword(s):

Cost Effective ◽

Original Design ◽

Specific Design ◽

Stator Core ◽

Cause Analysis ◽

Root Cause ◽

The Core ◽

Phase Lead ◽

The Past ◽

Core Damage

This paper presents an overview of the design and field installation events involved in rewinding and restacking AEP’s Conesville #5 generator. This style of generator, commonly known as a “double tube stack” machine, has been susceptible in the past to stator end winding vibration, stator coil and core deterioration, and phase lead problems. Following tests and inspections, AEP decided to rewind this generator in anticipation of the consequences of these problems. Successful pro-active maintenance, which included a complete stator rewind and stator core restack, prevented a costly forced outage. Root cause analysis of the coil failures are described, as well as details of the core laminations problems. Specific design enhancements over and above the original design will be discussed. In addition, details of the existing core damage will be discussed, as well as procedures used for core restacking. Fiber optic monitoring instruments were installed on the coil ends and the phase leads after the new coil installation was complete. Results of these initial readings will be shared. Successful startup and continued operation of this unit demonstrates that refurbishment of these large generators with inner gas cooled technology is reliable and cost-effective over other alternatives, such as conversion to water cooled technology.

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Improvement of Ventilation Analysis in Turbine Generator

Fluids Engineering ◽

10.1115/imece2005-80132 ◽

2005 ◽

Cited By ~ 4

Author(s):

Yoshihiro Taniyama ◽

Yasuo Kabata ◽

Yoshio Hashidate ◽

Kazunori Shioda ◽

Hitoshi Katayama

Keyword(s):

Branch Point ◽

System Analysis ◽

Design System ◽

Network System ◽

Gas Distribution ◽

Turbine Generator ◽

Stator Core ◽

Joint Point ◽

Fluid Analysis ◽

Fluid Network

Most of large electric rotating machines, for example, the generator and the motor adopt the cooling type that the coolant gas such as hydrogen and air is circulated inside. To improve the performance of the machine and the competitiveness of the product, development of cooling technology such as efficient and effective ventilation of coolant gas becomes important. In addition, it is also important to calculate the coolant gas distribution with high accuracy. This is because it is necessary to cancel the increase in the heat density by it. In this study, a new cooling design system for the turbine generator is developed, where calculation accuracy of the coolant gas distribution is developed and calculation time is reduced. The following shows the outline of this technical approach: 1) Development of a method of the fluid network system analysis that satisfy continuous condition and pressure condition in each branch, and considers divergence loss on branch point and convergence loss on joint point by the one dimensional transient fluid analysis. 2) A pressure loss database such as divergence loss on branch point and convergence loss on joint point reflects knowledge by the elemental experiment and 3D-CFD. In this paper, a basic code of the fluid network system analysis is introduced and verified by a one-slot ventilation model with half axial length of actual stator core.

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Polar Horizons: Images of the Arctic in Accounts of Amundsen’s Polar Aviation Expeditions

Scientia Canadensis Canadian Journal of the History of Science Technology and Medicine ◽

10.7202/1006152ar ◽

2011 ◽

Vol 33 (2) ◽

pp. 99-120 ◽

Cited By ~ 2

Author(s):

Marionne Cronin

Keyword(s):

Modern Technology ◽

The Arctic ◽

Press Coverage ◽

Polar Ice ◽

The Core ◽

The Press ◽

Complex Picture

Despite the conquest of the poles in the pre-war era, in the interwar years explorers continued to be drawn towards the poles—only now they travelled by air. Historians of exploration have argued that the introduction of this modern technology raised the explorer far above the perils of the polar ice, thereby eliminating the danger and hardship at the core of heroic exploration narratives. In this argument, the use of aircraft marked the end of the age of heroic exploration. Examining the press coverage of Roald Amundsen’s polar flights, however, reveals a more complex picture. Although the use of aircraft introduced tensions into the exploration narrative, particularly with regard to the images of the Arctic landscape deployed in these stories, analyzing these images highlights the ways in which the polar landscape was constructed in order to both renegotiate and rearticulate heroic exploration narratives in the era of polar aviation.

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Testing of Inter-Laminar Insulation of Stator Cores Using ELCID

ASME 2007 Power Conference ◽

10.1115/power2007-22060 ◽

2007 ◽

Author(s):

Mladen Sasic

Keyword(s):

Low Power ◽

Continuous Monitoring ◽

Stator Core ◽

Major Work ◽

Efficient Manner ◽

Test Information ◽

The Core ◽

Indispensable Tool ◽

El Cid ◽

Effective Use

The reliability of large generators is of major importance to maintain the integrity of power plant. Continuous monitoring or frequent inspection is therefore desirable to be able to remedy growing defects before a catastrophic failure or more major work becomes necessary. Recent test information may also permit more effective use of routine or unscheduled outages by means of additional preparation and provisioning. The stator core is a major electro-mechanical component of a generator to which this applies in particular, as failure and associated repair or replacement necessitates major disassembly of other parts of the machine. Information on condition of the core structure is therefore significant, but is increasingly difficult to obtain at frequent intervals. Low power core testing can be performed more quickly and easily than using traditional full flux methods and may need to be considered an indispensable tool to increase or maintain essential monitoring levels. Low power core testing presents opportunities to maintain the level of stator core lamination monitoring in a more time and resource efficient manner using comparatively short windows in available outage time, often partly overlapping with other concurrent maintenance activities. These opportunities are enhanced with wider use of low power EL CID testing without removal of the rotor, not feasible with thermal loop tests.

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