Lubrication and Reliability Handbook 2010 Part 9 ppsx

... motion, often with embedded particles and haloes. Causes Dirt particles in lubricant exceeding the minimum oil film thickness. Foreign matter Characteristics Severe scoring and erosion of bearing ... Wear and corrosion of production machinery, blocked pipe-lines, valve and pump failure. 8 Staff problems due to smell and possibly health. ANTI-MICROBIAL MEASURES These may involve: 1 C...

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... FIMechE LUBRICATION AND RELIABILITY HANDBOOK A2 Mineral oils A2.3 index of 95 (dynamic viscosity index 93 ). Figure 2.2 shows the difference between 150 Grade ISO 3448 oils with KVIs of 0 and 95 . Viscosity-pressure The ... in machine operation and maintenance of all kinds of machinery and plant. This Page Intentionally Left Blank

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... viscosity and other characteristics of the fluid have been omitted from this table, these play a very large and often complicated part in grease perform- ance. Certain bearing manufacturers demand ... and the type of thickener used in their manufacture. The section of this handbook on greases summarises the properties of the various types. Additive oils are not required for plain be...

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... hydroxystearate grease with speed and temperature A9 Gear and roller chain lubrication A9.2 AUTOMOTIVE LUBRICANTS SAE classification of transmission and axle lubricants These values are approximate and are given ... local conditions and environment) A8 Rolling bearing lubrication A8.3 Calculation of relubrication interval The relubrication period for ball and roller bearings m...

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... mounting unit and connecting electrical wiring. Avoid sharp bends and downloops in all pipework. Consult BS 4807: 199 1 ‘Recommendations for Centralised Lubrica- tion as Applied to Plant and Mechinery’ ... reservoir and interconnecting pipework Figure 19. 2 Multi-point lubricators mounted on receiving tank – system has the advantage of providing setting time and better filtration of...

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... source, e.g. large air fans. Figure 19. 5 Figure 19. 6 Figure 19. 7 Figure 19. 8 A 19 Circulation systems A 19. 5 CONTROL OF LUBRICANT QUANTITIES The quantity fed to the lubrication point can be controlled ... fittings and directional changes. The layout of a typical pressure control station is shown above. Figure 19. 13 Typical flow ratios Figure 19. 14 Figure 19. 15 A 19 Circulation s...

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... plain journal bearings A29High pressure and vacuum A 29. 1 PRESSURE Effect of pressure on lubricants Figure 29. 1 Effect of pressure on viscosity of HVI paraffinic oils Figure 29. 2 Effect of pressure ... the design pressure and temperature. Figure 25.1 A basic lubrication system complete with warning and protection devices Table 25.1 The function of each major system component and...

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... arise A31Chemical effects A31.3 A 29 High pressure and vacuum A 29. 4 Loss of surface films in high vacuum Surface contaminant films of soaps, oils and water, etc., and surface layers of oxides, etc., ... region characterised by metallic debris Table 30.2 A29High pressure and vacuum A 29. 3 VACUUM Lubricant loss by evaporation Table 29. 1 Lubricants and coatings which have been use...

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... corresponding to various components and problems B5 Wear debris analysis B5.6 Severe sliding wear Severe sliding wear particles range in size from 20 ␮m and larger. Some of these particles have surface striations as ... displacement and frequency and is thus likely to relate to fatigue stresses. The normal procedure is to measure the vertical, horizontal and axial vibration of a bea...

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... crown and ring land damage Characteristics The crown may show cracking and the crown land and lands between the rings may show major distortion, often with the ring ends digging in to the lands. Causes Major ... due to excessive clearance between housing and shaft Figure 15.11 Packed gland showing abnormal leakage outside the gland follower Figure 15.12 Packed gland showing uneven com...

Ngày tải lên: 11/08/2014, 10:22