2 edition of Effect of filtration on rolling-element-bearing life in a contaminated lubricant environment found in the catalog.
Effect of filtration on rolling-element-bearing life in a contaminated lubricant environment
Stuart H Loewenthal
1978 by National Aeronautics and Space Administration, Scientific and Technical Information Office, for sale by the National Technical Information Service in [Washington], Springfield, Va .
Written in English
|Statement||Stuart H. Loewenthal, Lewis Research Center, Donald W. Moyer, and John J. Sherlock, Tribon Bearing Company|
|Series||NASA technical paper ; 1272|
|Contributions||Moyer, Donald W., joint author, Sherlock, John J., joint author, United States. National Aeronautics and Space Administration. Scientific and Technical Information Office, Lewis Research Center, Tribon Bearing Company|
|The Physical Object|
|Pagination||30 p. :|
|Number of Pages||30|
A Bearing Life Prediction Method for Utilizing Progressive Functional Surface Damage Analysis from a Debris Contaminated Lubrication Environment Many lubrication environments in various equipment applications are inherently contaminated with debris and require mechanical components that are, as much as possible, resistant to the Cited by: 2. 2 filtration filter operation 25 rapid gravity filtration 25 backwashing 25 filter control systems 26 6 activated carbon filters 29 7 interaction with other treatment processes 31 prefiltration treatment 31 in-line filtration 31 8 process monitoring and control 35 9 operating procedures associated with normal process conditions the useful life of the oil and components and lowering yearly waste oil handling. Simply changing the oil when it is dirty to “New Oil” which often is not within acceptable ISO cleanliness requirements is not enough, although the oil may appear to be translucent and clean the fact is when this fluid is tested by a. 1. Bearing Lubrication Advice - One rule of thumb states that, “the service life of grease-lubricated bearings is reduced by half for every 10 degrees C (25 degrees F) increase in temperature above 70 degrees C ( degrees F).” If, for example, the calculated relubrication interval for a given bearing is 1, hours at 70 degrees C, this interval must be cut in half to hours if the.
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EHD lubricant film thickness to composite surface roughness ratio of Bearing life and running track condition generally improved with finer filtration.
The bearings tested in contaminated oil with 3-and micron absolute filters had statistically equivalent lives, Effect of filtration on rolling-element-bearing life in a contaminated lubricant environment book those of the baseline, noncontaminated lubricant bearings. Bearing life and running tract condition generally improved with finer filtration.
The 3 and 30 micron filter bearings in a contaminated lubricant had statistically equivalent lives, approaching those from the baseline tests. The experimental lives of 49 micron bearings were approximately half the baseline bearing's lives.
Key Words: rolling bearing, fatigue life, contamination, lubricant ﬁ lm thickness, debris dent Effect of Lubricant Film Thickness on Bearing Life under Contaminated Lubrication Part 2: Relationship between Film Thickness and Dent Formation 1.
Effect of filtration on rolling-element-bearing life in a contaminated lubricant environment book Introduction In Part 1, life tests for ball bearings were carried out inFile Size: KB. Oil and Water do Mix Dissolved Water Can effect oil life by increasing oxidation rates and degrading additives.
Emulsified Water Causes machine wear via corrosion, cavitation and loss of film strength. Shortens oil life by increasing oxidation, additive degradation and water washing. Free Water Serves to indicate that the oil has reachedFile Size: 2MB. Rolling direction Fig. 5 Example of dent-initiated flaking −Effect of Lubricant Film Thickness on Bearing Life under Contaminated Lubrication Part 1: Life Tests for Ball Bearings in Contaminated Oil− 20 Koyo Engineering Journal English Edition NoE () however, assuming that failure occurred in one of the two bearings for both failure modes, the life data were statisticallyFile Effect of filtration on rolling-element-bearing life in a contaminated lubricant environment book KB.
Determining Effect of Oil Filtration on Rolling Bearing Life William M. Effect of filtration on rolling-element-bearing life in a contaminated lubricant environment book Needelman and Erwin V. Zaretsky Summary InNeedelman and Zaretsky presented a set of empiri-cally derived equations for bearing fatigue life (adjustment) factors (LF s) as a function of oil filter ratings.
These equations for life factors were incorporated into the reference book. In case of contaminated machine environment with dust, sand or minerals, small solid debris particles could be involved into rolling bearing lubricant.
However, when particle contamination enters the bearing system, it is likely to cause damage such as bruising, which can shorten bearing life dramatically. Furthermore, when dirt from the environment or metallic wear debris from some component in the application is allowed to contaminate the lubricant, wear can become the predominant cause of Author: Noria Corporation.
Filters are used in most industries, especially the water, sewage, oil, gas, food and beverage, and pharmaceutical industries. The new edition of Filters and Filtration Handbook is an all-encompassing practical account of standard filtration equipment and its applications.
Completely revised and rewritten, it is an essential book for the. Bearings as a machine element are designed to facilitate relative motion. The expected life span for bearings in every each application, depending on operation conditions, is different.
Whilst numerous efforts have been focused on increasing the bearing life-time, over the last few decades, premature failures have been reported especially in automotive and wind turbine gearbox bearings i.e.e.g Author: Siavash Soltanahmadi.
In general, rolling-element bearing life increases with increasing level of oil filtration. Based upon test results, two equations are presented which allow for the adjustment of bearing LIO or catalog life based upon oil filter rating.
It is recommended that where no oil filtration is used catalog life. Quantifying and Reducing the Effect of Contamination on Rolling Bearing Fatigue Life Contaminants in the lubricant of rolling bearings have a strong life-reducing effect.
Various experimental processes of investigating into these influences on the life are discussed in by: 4. Effect of filtration on rolling-element-bearing life in a contaminated lubricant environment.
[Washington]: National Aeronautics and Space Administration, Scientific and Technical Information Office ; Springfield, Va.: For sale by the National Technical Information Service, (OCoLC) Material Type. A specially designed test system involving boundary lubricated roller bearings was used to study wear at low particle concentration levels.
A separate Cited by: In this study, the life tests for ball bearings were carried out in contaminated oil, and the effect of film condition on bearing life under contaminated lubrication was : Xiaolan Ai.
Lubrication Best Practices — Fundamentals of Lubricant Contamination Control Des-Case Corporation. Hy-Pro Filtration views. Extending Component Life through Contamination. Lubricant in Rolling Bearings Functions of the Lubricant in Rolling Bearings Lubricating Film with Oil Lubri-cation Main criterion for the analysis of the.
Microbial Contamination. Water is a known promoter of microorganisms such as fungi and bacteria. Over time, these can form thick biomass suspensions that can plug filters and interfere with oil flow. Microbial contamination is also corrosive.
Water Washing. When grease is contaminated with water, it can soften and flow out of the : Jim Fitch. Most widely held works by Tribon Bearing Company Effect of filtration on rolling-element-bearing life in a contaminated lubricant environment by Stuart H Loewenthal (Book) 3 editions published in in English and held by 91 WorldCat member libraries worldwide.
As little as 1% water in grease or oil can significantly shorten bearing life. Proper seals are critical for guarding against contamination. The bearing manufacturer can tell you what constitutes. Elastic deformation of the metals occurs, and there is effect of high pressure on the lubricant.
What will you do as 2/E, if lube oil is contaminated with sea water. When sump oil is contaminated with SW, find sources of leakage (may be from LO.
that 75% of the contamination in the oil is from sludge. A high performance filter offers capability to hold sludge along with dust in the oil. Cummins Filtration has found that by controlling these organic and inorganic contaminants, we can reduce wear in the engine and greatly increase engine life.
So the filter challenge is this:File Size: 83KB. Two Major Sources of Lubricant Contamination Dirt If the atmosphere is contaminated, oil will become dirtier and lubricant quality becomes compromised. Particulate contamination, once inside an operating system, will accelerate the generation of new contaminants.
These contaminants damage critical components and act as aFile Size: 84KB. A 14 minute video on the effects and damage caused by water and particulate contamination in lubrication and hydraulic systems.
A lubricant is a substance, usually organic, introduced to reduce friction between surfaces in mutual contact, which ultimately reduces the heat generated when the surfaces move. It may also have the function of transmitting forces, transporting foreign particles, or heating or cooling the surfaces.
The property of reducing friction is known as lubricity. UNESCO – EOLSS SAMPLE CHAPTERS PETROLEUM ENGINEERING – DOWNSTREAM - Environmental Impacts Of The Oil Industry - Jacqueline Barboza Mariano, Emilio Lèbre La Rovere ©Encyclopedia of Life Support Systems (EOLSS) DREW, D., Processos Interativos Homem-Meio Ambiente (Interactive Man-Environment Processes), 1 ed.
São Paulo, Difusão Editorial S.A. Study of Effect of Solid Contaminants in The Lubricant on Ball Bearings Vibration International Journal of Instrumentation, Control and Automation (IJICA) ISSN:Vol-1 Iss-3,4, Table Geometrical properties () of ball bearing Sample preparation In this study the samples of contaminated grease are used in bearing.
environments, resulting in substantial increases in service life compared with all-steel bearings. However, no detailed studies have been published on the effects of lubricant contamination in hybrid bearing systems. Some tests have, however, shown indica- tions of.
The oil life indicator lets a driver know when it's time for a change, based not only on mileage, but on actual conditions that affect the quality of the oil. Depending on the vehicle manufacturer and the specific equipment used, oil indicators come in two basic varieties: algorithm-based and direct : Akweli Parker.
filtration and circulation systems, and contracting with suppliers who conduct audits and cooling curve analyses, a heat treater can effectively guard against contamination and ensure oil quality and long tank life. A wide range of quenching characteristics can be obtained with oil- based quenchants through careful formulation and Size: KB.
It is very difficult to reverse the effects of water pollution. Natural processes that cleanse the water can take years, decades, or even centuries, and even with costly technological processes, it can take years to remove all of the harmful substances from the water. .
12/9/ MOISTURE The Second Most Destructive Lubricant Contaminate, and Its Effects on Bearing Life The human being is the main responsible for water pollution. Humans are the main cause of water pollution, which is triggered in many ways: by the dumping of industrial waste; due to temperature rise, that cause the alteration of water by reducing the oxygen in its composition; Or due to deforestation, which causes sediments and bacteria to appear under the soil and therefore contaminate.
A rolling-element bearing, also known as a rolling bearing, is a bearing which carries a load by placing rolling elements (such as balls or rollers) between two bearing rings called relative motion of the races causes the rolling elements to roll with very little rolling resistance and with little sliding.
One of the earliest and best-known rolling-element bearings are sets of logs. The life of a bearing depends on the proper lubrication of the bearing. Lubricants aid in carrying away heat, protecting bearing surfaces from corrosion and reducing friction.
Statistics show that nearly 50 percent of all bearing contamination and damage can be attributed to inadequate lubrication. The paper also discusses soot formation and its general effects within the engine (including friction and efficiency), as well as other issues including filtration or removal, effects on the lubricant, engine design and operation, and future industry targets and technologies related to soot by: Bearing life is influenced by many factors.
Two of the most important are lubrication and contamination. Through a better understanding of the mechanisms that lead to reduced bearing life owing to the effects of such factors, we can improve bearing design and operation. In this two-part series of articles we focus firstly on lubrication.
Industrial wastewater treatment describes the processes used for treating wastewater that is produced by industries as an undesirable by-product. After treatment, the treated industrial wastewater (or effluent) may be reused or released to a sanitary sewer or to a surface water in the environment.
Most industries produce some trends have been to minimize such production or. The life of a bearing depends largely on the quality and presence of the lubricant. Bearing lubricant assists in preventing corrosion, reducing friction, and transferring heat.
However, water and debris contamination prevent the lubricant from functioning properly. Filtration for Improved Bearing and Equipment Life This proves the importance of including filter analysis in any lube programme.
I noticed a pressure rise on the filter unit and on inspection I noticed large amounts of metallic material caught in the filter.
The filter was sent away for analysis, and from the results we inspected the gearbox. contamination and stress pdf these components extending the normal life cycle up to 5 times. How to control the effects with the most cost effective solution?
The vast majority of resources utilized by people all over the world are possible because of some form of Hydraulic or Lubricated equipment.in the water environment and caused negative effects to the eco-system and human’s life.
There are many types of industrial wastewater based on different industries and contaminants; each sector produces its own par ticular combination of pollutants.This a great children's book to teach kids ebook water pollution and its harmful effects on the animals and ecosystem.
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