Homework 5

# Homework 5 - ME 3365 Introduction to Design Homework 5(Due...

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Unformatted text preview: ME 3365 Introduction to Design Homework 5 (Due: March 15, 2008) l. A 2 1/2 X 2 V2 -in sleeve bearing uses grade 20 lubricant. The axial-groove sump has a steady state temperature of HOT. The shaft journal has a diameter of 2.5 in with a unilateral tolerance of -0.001 in. The bushing bore has a diameter of 2.504 in with a unilateral tolerance of 0.001 in. The journal speed is 1120 revfmin and the radial load is 13 00 lbf. Estimate (a) The magnitude and location of the minimum oil-ﬁlm thickness. (b) The eccentricity. (e) The coefﬁcient of friction. (d) The power loss rate. (e) Both the total and side oil-ﬂow rates. (f) The maximum oil—ﬁlm pressure and its angular location. (g) The terminating position of the oil ﬁlm (h) The average temperature of the side ﬂow. (i) The oil temperature at the terminating position of the oil ﬁlm. 2. A compound gear train as shown in the following ﬁgure, Gear 1 has 24 teeth and Gear 2 has 7’0 teeth of diametral pitch of 4. Gear 3 has 30 teeth and Gear 4 has 50 teeth of diamerral pitch of 3. Gear 1 turns 12 rpm in clockwise direction. (a) Computer the speed and direction of the shaft carrying Gear 4. (b) Find the torque at Shaft c if the input horsepower at Shaft a is 50? Shaft 13 Gear 1 Gear 2 Gear 3 Gear 4 ©KMPH Page 1 of 1 Rev, 4f8i'2008 u "I TEXAS TECH UNIVERSITY Sheet Of ‘__' Department of Mechanical Engineering~ By Date N: 1120 Yen/WW :6 2 2'5 i’ gang loonan Pén‘ﬁm mam Pmnmwj’e'rs. (0‘3 9‘5"" £35 12%; “m, ~= 0'4‘82. ..‘. ha .2: 0‘422-(0‘061) : 0'000c364 bu Pfcw.%ra\2ﬁl7’ ¢ : Béo (Q 6 T; (1ka .2 o~ooz~ 0000964 -= 0‘00104” (G) 9mm I243, ‘1 TEXAS TECH UNIVERSITY Sheet m“ Of 53, Department of Mechanical Engineering By _ Date (a) 'T 2—- *fw‘f a: o-oaeaijPz—S) “:2 ‘3 " 84 “a; ' 1W ZWT biotin) N ("rev/- H :— ._ 2m a N (v20 _ .(an 993905-310 (mm) engine) 9336 Go «1 @‘124 BTU/3.1.; ww‘ Ce) em in, a TC- -.‘. Q = ‘4‘“16 Li»26)C¢‘0029< 66>G‘JQ i 5 w- 'T' ~ .g {I Ch) 72W; ~— T5+ ﬁg: Z; “of 2:1; : 12—3‘aor; 0’) To 7' Ts+ M” 1110+ 2’?‘8 : i‘37°85i= 1:: :.. '3' TEXAS TECH UNIVERSITY Sheet Of Department of Mechanical Engineering 33, Date ...
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