Oil and wear particle anlysis

The subsurface cracking typically nucleates at material defects or inclusions in bearing steels. These particles range between 10 micron and several hundreds of microns in their major dimension. Figures 10 and 11 show individual laminar fatigue wear particles ranging between 50 micron and micron Figure 10 and micron and micron Figure Using the flow decay method, a sample of oil is passed oil through a calibrated screen that acts like a filter.

The location of the worn part and its wear severity can therefore be estimated using iron and copper concentrations. The case study demonstrates that solid particulate concentration measurements combined with wear particle analysis can aid in identifying solid contaminant particles and help predict how bearing life and reliability will be impacted.

This enables them to enter bearing interfaces and dent bearing surfaces, as illustrated in Figure 1. Click here to see table. The microscope studies the morphologies of the wear particles, using both white reflected light and green transmitted light.

The run-in period was observed to be 19 months because of the relatively short accumulated working time of the bearing. Deep-spalling chunky particles have two possible physical features generated by their passage through rolling contacts.

Opt, M X, Filtergram Figure 24 Opt, M X, Filtergram Because large spherical particles are the product of localized metal-to-metal contact and high frictional temperatures between rolling contact surfaces, their presence is often considered a supplementary or supporting symptom for assessing wear severity levels.

Their widths generally range between 5 micron and 20 micron, and sometimes even thicker. Because of the correlation between fatigue wear deterioration and wear particle characteristics, several Rolling Fatigue Wear Severity Atlas Charts Chart 1 are included in this chapter.

The important takeaway from this method is that it only accounts for hard particles such as wear metal and dirt.

Understanding Particle Counting Methods

You receive an automated email notification when your samples are received at our lab and the moment the testing is completed. However, help is on the way. During the two-year monitoring period, lubricating oils from bearings in the other three converters Nos. It was the relatively short working time of the bearing that led to a run-in lasting 19 months.

The pebble-like particles, which can also be seen as chunky particles, are easily identified by their prominent three-dimensional features.

At each severity level, photos of typical fatigue wear particles, correspondent fatigue wear surfaces and representative applications are displayed with the Rolling Element Bearing Fatigue Wear Severity Atlas. This is where wear analysis comes into play.

This article examines how oil analysis was used to monitor the bearing wear on the drive side of the No. Thus, the quantity of debris in two size ranges, approximately equivalent to particles greater-than or less-than 5 microns, can be determined to provide an early warning of an active wear problem.

Opt, M X, Ferrogram Figure They are very consistent and that gives me peace of mind. This may result in poor detection sensitivity, or problems going unidentified if elemental analysis is relied upon as the sole source of wear particle detection.

I took that report to the machine owner at the plant and was able to show him the images. The microspall particles that are generated this way are relatively small, ranging between 10 micron and 30 micron in their major dimension; however, their major dimension is sometimes as large as 50 micron.

They have a low aspect ratio of approximately to-1, as shown in Figures 13 and These converters had been running for more than 10 years with no evidence of abnormal wear. Formation of Chunky Fatigue Wear Particles2 Thus, the propagation of fatigue cracks has changed direction. Like X-rays used as a medical diagnostic tool, the higher energy of the X-ray radiation can penetrate into the particles, allowing the detection of larger particles than conventional spectrochemical analysis.

DR Ferrograph Analytical Results As shown in Figure 1, the copper concentration increased sharply from May 27, to October 26,then it declined gradually, becoming stable in December A majority of chunky particles are thick platelets resulting from over-rolling.

Recently, particulate-indentation induced surface fatigue has attracted greater attention among tribologists. Results The drive-side bearing on the No. Same Day Turnaround There are some things in life that you can still count on.

Feel assured that we got your back. For this reason, educated oil analysis users focus their attention on contamination monitoring and control, and on ensuring that the physical and chemical properties of the oil are in good condition.

Their aspect ratio ranges between 5-to-1 and 1-to Opt, M X,Filtergram Laminar particles have high aspect ratios varying between to-1 and to Based on how quickly the screen is clogged, which impacts oil flow, the instrument translates that data into a particle count with an ISO code.

Wear particle analysis, using tools such as ferrous density and ferrographic analysis, can play a valuable role in determining the root cause of active machine wear. However, unlike many common oil analysis tests that are quantitative in nature, successfully interpreting information on wear.

courses covering oil & wear particle analysis, lubrication management, WebCheck and the management of an oil analysis program. Oil Analysis tests for Wear Managing an Oil Analysis Program Benefits and Goals of Oil Analysis Setting up an OA Program Purchasing OA Test Kits.

Wear particle analysis, using tools such as ferrous density and ferrographic analysis, can play a valuable role in determining the root cause of active machine wear. However, unlike many common oil analysis tests that are quantitative in nature, successfully interpreting information on wear.

Wear Analysis

Revolutionize wear particle analysis for predictive maintenance Understanding and trending machine wear is critical for predictive maintenance. Oil analysis is the best routine non-destructive technology (NDT) for detecting surface wear on a wide array of oil lubricated machines like engines, turbines, gearboxes, motors, and compressors.

Wear particle analysis is a powerful technique for non-intrusive examination of oil-wetted parts of a machine. The particles contained in the lubricant carry detailed and important information about the condition of the machine.

Oil Analysis + Wear Particle What Failed Demulsibility Results Mean Demulsibility, or more correctly, water separation, is a measure of .

Oil and wear particle anlysis
Rated 0/5 based on 68 review
Particle counting