Tecnología de recuperación del árbol de la bomba centrífuga k-45/30a en la refinería de Cienfuegos
Numerous companies and industries for the production and transfer of liquids use different types of pumps, including centrifugal pumps, a type of hydraulic pump used to transform the mechanical energy of an impeller into kinetic energy. The shaft of a centrifugal pump is the support of all the eleme...
Guardado en:
| Autores principales: | , , |
|---|---|
| Formato: | Artículo |
| Lenguaje: | español |
| Publicado: |
2022
|
| Materias: | |
| Acceso en línea: | https://dialnet.unirioja.es/servlet/oaiart?codigo=8793607 |
| Etiquetas: |
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| Sumario: | Numerous companies and industries for the production and transfer of liquids use different types of pumps, including centrifugal pumps, a type of hydraulic pump used to transform the mechanical energy of an impeller into kinetic energy. The shaft of a centrifugal pump is the support of all the elements that rotate on it, also transmitting the movement imparted by the motor. The objective of the work was to solve the faults in the shaft of the K45/30a centrifugal pump, which has the function of supplying a brine capable of suppressing calcium and magnesium from the water used in the boilers of the Camilo Cienfuegos Oil Refinery, in the province of Cienfuegos, Cuba. The methodology used is widely known from the research previously developed, however, there are different recovery methods in correspondence with the breakdowns or breakages of parts and pieces, which originates a deepening of the studies. For this reason, we start from the technical analysis of the causes and the economic valuation of the wear of the trunnions in the shaft and determine what could be feasible to do, reducing the economic cost. For its recovery, the type of material and its hardness are determined, and technological processes such as metallizing and machining are carried out, which is integrated to the technology, tools and necessary means of the recovery process. As a result of the bibliographic review, it is possible to characterize the P-52-107 pump with model K-45/30th and to study its main failures during its operation. The shaft is made of SISI SAE 4140 steel, a medium carbon steel alloyed with chromium and molybdenum of high hardenability and good resistance to fatigue, abrasion and impact. This steel can be nourished to give it greater resistance to abrasion. The most common failures presented in pump shafts are due to wear, which can be defined as a loss of material from the interface of two bodies, when they are adjusted to a relatively low movement under the action of a force. Thus, the cause of the shaft failure was due to corrosion that caused the brine flow to leak through the mechanical seal, which has allowed focusing attention on maintenance improvements. Quality is guaranteed and its useful life is extended by coating the affected area with Proxon 21022 to prevent liquid leakage. It is an alloy specifically developed for dimensional recovery that provides a coating resistant to metal to metal friction and oxidation. Its use manuals indicate that it can be used on surfaces affected by corrosion in bearing housings, hydraulic pistons, stuffing boxes and machine tool spindles, among others, complying with the ideas of reuse, reduce, recycle, which has a positive impact on the environment. An economic analysis is made on the basis of the recovery carried out, taking into account all the parameters involved in direct as well as indirect costs. The manufacturing cost is composed of direct costs or expenses incurred in the production process and indirect costs or expenses incurred in the management, organization and collateral services to the production process, so the recovery proposal was feasible. |
|---|