Increasing reliability of equipment with the aim of reducing breakdowns on high productivity faces with special reference to machine and equipment dynamics. FINAL REPORT

Directorate-General For Energy

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• Publié par: DIRECTORATE-GENERAL-FOR-ENERGY
• Nombre de lectures: 34
• Langue: English
• Poids de l'ouvrage: 4 Mo

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COMMISSION OF THE EUROPEAN COMMUNITIES
coal research reports
Increasing reliability of equipment with the
aim of reducing breakdowns on high
productivity faces with special reference
to machine and equipment dynamics
Blow-up from microfiche original
1978 EUR 6095 ΕΓ COMMISSION OF THE EUROPEAN COMMUNITIES
coal research reports
Increasing reliability of equipment with the
aim of reducing breakdowns on high
productivity faces with special reference
to machine and equipment dynamics
N.C.B. London
Convention No 6220-70/8/801
FINAL REPORT
Published by the Directorate-General
Scientific and Technical Information and Information Management
1978 EUR 6095 Er LEGAL NOTICE
Neither the Commission of the European Communities nor any person acting
on behalf of then is responsible for the use which might be made of
the following information Commision of the European Communities
Directorate General - Energy
INCREASING RELIABILITY OF EQUIPMENT WITH THE AIM OF REDUCING BREAKDOWNS ON HIGH
PRODUCTIVITY FACES WITH SPECIAL REFERENCE TO MACHINE AND EQUIPMENT DYNAMICS
Final Report on the ECSC Research Project 6220-70/8/801
Duration of Project July 1973 - June 1977
Research work carried out with financial aid from the
European Coal and Steel Community.
MRDE Ashby Road Stanhope Bretby Burton-on-Trent Staffs DE15 OQD 622.23.00U.15
EUROPEAN COMMUNITIES COMMISSION
Increasing reliability of equipment with the aim of
reducing breakdowns on high productivity faces with
special reference to machine and equipment dynamics:
final report on the ECSC research project
622O-70/8/8OI
MRDE, 1978. 169PP (Confidential)
MINING RESEARCH AND DEVELOPMENT ESTABLISHMENT
RELIABILITY; MACHINES; COAL MINE CONTENTS
SYNOPSIS
SECTION 1. ROUND-LINK CHAIN - LIFE AND SAFE WORKING LOAD
1. BACKGROUND
2. EXISTING KNOWLEDGE
3. CURRENT OBJECTIVES
1+. TEST EQUIPMENT
l+.l Single-sprocket Chain Test Rig
k.2 Multiple-sprocket Chain Test Rig
5. TEST METHOD
5.1 Chain
5.2 Coupling Links
6. DESCRIPTIONS OF COUPLING LINKS
6.1 Articulating Link
6.2 Non-articulating Link (W)
6.3g Link (X)
6.kg Link (Y)
6.5 Non-articulating Link (Z)
7. RESULTS
7.1 18 mm D-quality Chain
7.2 22 mm C-quality Chain
7.3 22 mm Coupling Links
7.3.1 General
7.3.2 Articulating Link
7.3.3 Non-articulating Link W
7.3.Ug Link X
7.3.5g Link Y
7.3.6 Non-articulating Link Ζ
8. DISCUSSION
8.1 18 mm D-quality Chain - Life on a Sprocket
8.2 l8 mm D-q.uality Chain - Wear and Elongation 8.3 22 mm C-quality Chain - Life on a Sprocket
8Λ 22 mmy Chain - Wear and Elongation
8.5 22 mm Coupling Links
8.5.1 General
8.5.2 Articulating Links
8.5.3 Non-articulating Links
8.5.U Tensile Strength
8.5.5 General Comments on Design
9. SAFE WORKING LOAD
10. SPROCKET DESIGN AND COMPATIBILITY
11. VALIDITY AND APPLICATION OF RESULTS
12. CONCLUSIONS
13. REFERENCES
APPENDIX. DETAILED DRAWINGS OF THE HEAVY-DUTY MULTI-SPROCKET CHAIN TEST RIG
Tables
1. Comparison of ISF for Driver, Idler and Driven Conditions
2.n of ISF for a Drive Link passing over a 5-tooth Driver
Sprocket using Different Lubricants
3. Comparison of ISF for a Drive Link passing over Different Sized Idler
Sprockets
k. Properties of Round Link Chain to BS 2969:1969
5. Wear and Life of 18 mm D-quality Chain - Coaldust Lubricated
6. Wear and Life of 18 mmy Chain - Unlubricated
7. Wear and Life of 22 mm C-quality Chain
8. Life of 22 mm Coupling Links passed over a 5-tooth sprocket unlubricated
at lUO kN
9- Life of 22 mm Coupling Links passed over a 5-tooth Sprocketd
at 200 kN
Figures
1. The Relationship between the Number of Teeth in an Idler Sprocket and
the Increased Strain Factor of the Drive Link in Overpitched Chain
2. Single-sprocket Hydraulic Chain Test Rig
3. Heavy-duty Multi-sprocket Chain Test Rig
k. Life of Coaldust-lubricated Chain on a Sprocket (l8 mm) 5. Life of Unlubricated Chain on a Sprocket (18 mm)
6. Wear Rate and Load: 18 mm Chain on a Sprocket
7. Broken D-quality l8 mm Chain Link
8. Life of C-quality Chain on a Sprocket (22 mm)
9. Wear Rate and Load: 22 mm Chain on a Sprocket
10. 22 mm Articulating Coupling Link (broken)
11. 22 mm Non-articulating Coupling Link W (broken)
12. 22 mmgg Link X (broken)
13. 22 mm Non-articulating Coupling Link Y (broken)
lU. 22 mmgg Link Ζ (broken)
15. Recording of Chain Tension during Cutting
SECTION 2. COALFACE HYDRAULIC SYSTEMS
1. INTRODUCTION
2. BASIC SYSTEM DESIGN
2.1 Pump Size
2.2 Choice of Valve and Hose Size
2.3 Choice of Pressure Level
3. HOSE SYSTEM DESIGN
3.1 Introduction
3.2 Calculation
3.3 Ring Systems
3.U Branched Systems
3.5 Design Method
k. FILTRATION
h.1 Introduction
U.2 Investigations
k.3 Sources of Contamination
k.k Recommendations
5. RESERVOIR DESIGN
5.1 Introduction
5.2 Causes of Tidal Flow 5.3 Actual Tidal Flow
6. CENTRALISED HYDRAULIC POWER SUPPLY
6.1 Introduction
6.2 Description of Installation
6.3 Operating Experience
6.3.1 Hydraulic Fluid Control
6.3.2 FSW Split-delivery Pumps
6.3.3 Hydraulic Ancillaries
6.3.1+ Noise Levels
6.3.5 Circuit Characteristics
6.k Future Aims
7. IMPLEMENTATION
7.1 System Design
7.2 System Operation
8. REFERENCES
Figures
1. Pump Capacity Required for Systems with Different Numbers of Operators
2. Effect of Limited Pump Capacity on Demand
3. Distribution of a Random Demand and System Performance with Pumps of
Various Capacities
k. Pressure Losses for Basic Systems
5.e Loss in a Ring
6. Pressure Loss in a Branched System
7. Hydraulic System of a Coalface Powered Support Installation
8. Filtered Emulsion Samples showing Debris Content
9. Diagram of Tank Levels
10a. Tank Level Recording Device
10b. Close-up of Chart and Pen Drive for Tank Level Recording Device
11. Typical Tank-level Recording
12. Underground Central Pumping Station Feeding Three Coalfaces with
Provision for Surface Monitoring (Artist's Impression)
13. Experimental Central Pumping Station, Donisthorpe Colliery