Abstract
The complexity of failure phenomena leads us to look for ways
of improving maintenance strategies and policies to enable equipment to perform
its intended functions properly. Engineering reliability theory plays a very
important role in the maintenance of such equipment.
Thus, maintenance of industrial systems has become a necessary
element for the development of companies seeking to conquer more and more
markets. In our case study, we're looking at a centrifugal pump whose main role
is to increase fluid pressure. A study of the maintenance of this production
tool and the use of data relating to corrective and preventive maintenance
schedules enabled us to extract reliability indicators and calculate optimum
preventive maintenance times.
The aim of the study is to propose ways of reducing machine
downtime in order to increase availability and thus reduce maintenance costs.
In particular, this evaluation will address the spacing of planned shutdowns
(from June 27, 2023 to February 6, 2024) on a critical "Sulzer 086 centrifugal
pump" system at MMG Kinsevere in Lubumbashi. The aim will be to develop an
approach for maintaining or improving the pump's operational reliability after
spacing out planned shutdowns.
A process inspired by reliability-based maintenance was
developed. System unavailability was assessed for several preventive
maintenance scenarios. This study demonstrated that availability is less
sensitive to the spacing of planned shutdowns than to the optimization of
preventive maintenance.
To achieve our objectives, we examined the factors
compromising equipment uptime. After comparing them with the data in the data
sheet indicating the average running time, we carried out an in-depth analysis.
suggested appropriate solutions.
The conclusions of our study corroborated all the hypotheses
formulated. They show that the pump's performance is below average, while its
maintainability is considered quite satisfactory.
Key words: centrifugal pump, maintenance, optimization,
reliability, availability, maintainability.
VI
Table des matières
Table des matières
Epigraphie I
Dédicaces II
Remerciements III
Résumé IV
Abstract V
Table des matières VI
Liste des figures VIII
Liste des tableaux X
Liste des abréviations XI
INTRODUCTION GENERALE.....................1 Chapitre 1:
GENERALITES SUR LES POMPES CENTRIFUGES.....................3
1.1. Introduction sur les pompes 3
1.2. Types des pompes 3
1.2.1. Pompes volumétriques 4
1.2.2. Pompes non volumétrique (roto-dynamiques ou
turbopompes) 5
1.3. Généralités sur les moteurs asynchrones
12
1.3.1. Introduction 12
1.3.2. Définition 12
1.3.3. Constitution de la machine asynchrone 12
1.3.4. Principe de fonctionnement d'une machine asynchrone 12
1.4. Accouplements 13
1.4.1. Définition 13
1.4.2. Différents Types d'accouplement 13
1.4.3. Critères de choix d'un accouplement 14
1.5. Etude technique de la pompe SULZER 086 14
1.5.1. Description et rôle des pompes Sulzer 14
1.5.2. Caractéristiques et avantages des pompes Sulzer
14
1.5.3. Etanchéités Sulzer 15
1.5.4. Description et rôle de la pompe Sulzer 086 16
1.5.5. Principe de fonctionnement de la pompe Sulzer 086 16
1.6. Conclusion partielle 16
| 
