Causas y señales de sobrecalentamiento en el turbocompresor

En este artículo técnico, Melett explica las causas y señales de que existe sobrecalentamiento en el turbocompresor.

Sobrecalentamiento es el término usado para describir componentes que han sido sometidos a altas temperaturas de gases de escape o a enfriamiento insuficiente. De esta manera, Melett explica las causas y señales de que se dé esta anomalía en el turbocompresor.

Artículohttps://www.lacomunidaddeltaller.es/causas-y-senales-de-sobrecalentamiento-en-el-turbocompresor/?utm_source=MVPress&utm_campaign=04192035d6-Boletin98&utm_medium=email&utm_term=0_3328eff184-04192035d6-167309657&ct=t(Boletin98)

Causas de sobrecalentamiento

-Apagado del motor caliente.

-Aspectos del DPF, como regeneración, que causa mayor presión en los gases de escape y temperaturas que llevan al sobrecalentamiento del turbo en el lado de la turbina.

-Reprogramación de la ECU o la sobrealimentación de combustible.

Señales de sobrecalentamiento

-Decoloración en el extremo caliente de la rueda de turbina, extendiéndose a lo largo del área del cojinete.

-Absorción de calor desde el lado de la turbina del turbo hacia el lado del compresor, causando decoloración al eje de turbina y al cuerpo central.

-Decoloración de piezas internas incluyendo arandela y porta-segmento de empuje, ocasionalmente sin evidencia de desgaste.

-Colapso (pérdida de tensión) del anillo de pistón de turbina.

-Acumulación de carbonilla en los conductos de aceite y área del anillo de pistón.

-Desgaste excesivo anormal del anillo de pistón y ranura del lado de turbina.

-Apariencia de los álabes de turbina curvados uniformemente hacia abajo.

-Fractura de secciones pequeñas o bordes de los álabes de turbina/pérdida parcial de álabes.

Prevención

-Revise que el filtro de partículas está en buenas condiciones de operación.

-Verifique que no hay fugas en las líneas de enfriamiento.

-Permita que el turbo tenga tiempo de enfriarse, particularmente después de jornadas largas o duras condiciones de conducción.

 

CONSEJO TÉCNICO: El sobrecalentamiento puede conducir frecuentemente a lubricación insuficiente debido al calor excesivo en el lado de la turbina y/o carbonización del aceite en los conductos de aceite.

Turbo reman continues to face many challenges

Turbocharger reman continues to face many challenges – but it is up to the market to take advantage of any opportunities and maintain quality standards, says Darren Johnson, Sales Manager of Melett.

The decline of diesel engines across Europe remains a concern. According to industry data expert GiPA, with the fuel type widely demonised, several countries saw diesel’s share of total registrations drop by 20% or more between 2014 and 2018.

But there are still millions of diesel cars between one and five years of age with their ‘prime’ workshop years ahead of them. With nearly half of the diesel parc falling into this category, GiPA fully expects the importance of diesel to the aftermarket to increase in the coming years, as more and more of these younger bracket vehicles age.

This, coupled with the growth in gasoline turbos does mean that, at the point of entry, turbos have a bright future.

 

Read more – https://www.rematec.com/news-articles/ensuring-viability/

 

[Source – Rematec News, October 2019 –  https://www.rematec.com/news-articles/ensuring-viability/]

 

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Why do turbo’s fail? Overheating

What is overheating?

Overheating is a term used to describe components that have been subjected to abnormally high exhaust temperature or insufficient cooling.

Causes of overheating:

  • Hot shut down
  • DPF issues, such as regeneration, resulting in increased exhaust gas pressure and temperatures which leads to overheating of the turbine side of the turbocharger
  • Remapping, chipping or over-fueling

Find out more about Overheating…

To find out what causes overheating, the signs of oveheating and how to prevent overheating. Check out of latest out our latest Common Turbo Failure documents here – Read More

 

For further common turbo failure topics, check out our other helps guides

Common turbo failure modes create much discussion between our customers and technical department. To help identify common failures in warranty situations and to provide advice on how to prevent future failures occurring, we have created a series of help guides:

Overspeeding

Foreign Object Damage

Oil Leaks

Oil Contamination

Insufficient Lubrication

REA / SREA

 

For further information on this or other topics, visit www.melett.com/technical or contact our Technical team via mel_techsupport@wabtec.com

 

What are Turbo Oil Leaks?

Oil leaks can cause catastrophic damage to the bearing systems and occur within seconds of the turbocharger commencing operation.

Oil  leaks  can  be  caused  by  a  variety  of   factors,   the   main   factor   being   incorrect   pressure within the compressor and turbine housings.

When a turbocharger is installed correctly, it should NOT leak oil, however, there can be cases where oil leaks occur.

Find out more…

To find out more about the main causes and signs of oil leaks, as well as, information about how to prevent future oil leaks – check out this article!! – Read more…

 

For further common turbo failure topics, check out our other helps guides

Common turbo failure modes create much discussion between our customers and technical department. To help identify common failures in warranty situations and to provide advice on how to prevent future failures occurring, we have created a series of help guides:

Overspeeding

Foreign Object Damage

Oil Leaks

Oil Contamination

Insufficient Lubrication

REA / SREA

 

For further information on this or other topics, visit www.melett.com/technical or contact our Technical team via mel_techsupport@wabtec.com