Lubrication Fundamentals 2011 Part 8 pps

... engines present a variety of lubrication challenges, certain factors affecting lubrication are more or less common to all reciprocat- ing engines. The primary objectives of lubrication of reciprocating ... provide a more comprehensive description that includes all the factors that make a particular oil suitable for a particular type of engine service. F. Alkalinity Most detergents, and...

Ngày tải lên: 11/08/2014, 10:23

... Hemisphere Distribution Marcel Dekker AG Hutgasse 4, Postfach 81 2, CH-4001 Basel, Switzerland tel: 41-61-261 -84 82; fax: 41-61-261 -88 96 World Wide Web http://www.dekker.com The publisher offers ... from about 80 ЊF (27ЊC) to 0ЊF(מ 18 C). One other important difference between these base stocks is shown by the differences in viscosity index. While both oils have similar viscosi- ties at...

Ngày tải lên: 11/08/2014, 10:23

... Shake flask CEC test Mineral oil 389 to Ͼ5000 42– 48 (Not tested) Vegetable oil 633 to Ͼ5000 72 80 Ͼ90 Synthetic ester Ͼ5000 55 84 Ͼ90 Polyglycol 80 to Ͼ5000 6– 38 (Not tested) Sources: Shake Flask ... common tests. 1. Vickers V-104C Pump Test (ASTM D 288 2). A rapeseed-based EA antiwear hydraulic fluid provided little or no pump wear in the ASTM D 288 2 pump test. In addition to the stand...

Ngày tải lên: 11/08/2014, 10:23

... time. Thin film lubrication includes mixed film and boundary lubrication. 3. Solid films are more or less permanently bonded onto the moving surfaces. A. Fluid Films Fluid film lubrication is ... ‘‘elasto’’ part of the term referring to the requirement that elastic deformation of the surfaces occur before the film can be formed. This type of lubrication is called elastohydrodynamic...

Ngày tải lên: 11/08/2014, 10:23

... lubrication and the forma- tion and maintenance of lubricating films, gears can be classified as follows: Spur (Figure 8. 44), bevel (Figure 8. 45), helical (Figure 8. 46), herringbone (Figure 8. 47), ... (Figure 8. 46), herringbone (Figure 8. 47), and spiral bevel (Figure 8. 48) gears Worm gears (Figure 8. 49) Hypoid gears (Figure 8. 50) The differences in the action between the t...

Ngày tải lên: 11/08/2014, 10:23

... viscosity grade 32 ( 28. 8–35.2 cSt at 40ЊC). Some applications require somewhat higher viscosity oils, ISO viscosity grade 46 (41.4–50.6 cSt at 40ЊC) or ISO viscosity grade 68 (61.2–74 .8 cSt at 40ЊC). ... Rights Reserved. Figure 13.12 Bulb turbine installation. II. LUBRICATED PARTS The main parts of hydraulic turbines requiring lubrication are the turbine and generator bearings, the gui...

Ngày tải lên: 11/08/2014, 10:23

... 0.12 6 8 65–125 500–750 1 0. 18 8–10 125–225 750–1100 1.33 0.24 10–12 225–350 1100–1500 1–2 0.34 12–15 350–600 1500–2000 2–3 0. 48 15– 18 600–1000 2000–2600 3–4 0.62 18 24 1000– 180 0 2600–3600 4–5 0 .86 24–30 ... 0.62 18 24 1000– 180 0 2600–3600 4–5 0 .86 24–30 180 0–3000 3600– 480 0 5–6 1.15 30–36 3000–4500 480 0–6000 6 8 1.44 36–42 4500–6500 6000–7500 8 10 1 .80 42– 48 6500–900...

Ngày tải lên: 11/08/2014, 10:23

... called the squeeze film . O. Reynolds referred to the squeeze effect in his famous paper on lubrication ( 188 6) and stated that it was an important mechanism, together with the wedge effect, for the ... Engineering, Trans. ASME, March 1959, Vol. 81 , pp. 94 - 100. 3. W.A. Gross, “Gas Film Lubrication , John Wiley & Sons, Inc., New York, 1962, pp. 1 38 - 141. 4. E.J. Barlow, “Self-Actin...

Ngày tải lên: 11/08/2014, 08:21

... we can hear it. A B C D TÀI LIỆU ÔN TẬP THI TỐT NGHIỆP MÔN TIẾNG ANH Năm học 2010- 2011 Part 8 1. He left home early …………. he could arrive at the station on time . A. because of ... English they can communicate with foreigners. A. so that B.so that C. in order to D. A & C 18. He left home early A.so that he could arrive at the station on time. B. in order that h...

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