Question

In: Mechanical Engineering

A .05 wide journal bearing supporting the loads on a 1 inch shaft just meets the...

A .05 wide journal bearing supporting the loads on a 1 inch shaft just meets the Trumpler’s design criteria for a FACTOR OF SAFTY OF 2.05. The bearing satisfies all the other Trumpler’s design criteria by much larger margin. Your colleague suggests that increasing the bushing width to 0.75 inches would be an adequate design and you would not need to conduct another journal bearing analysis because the greater width would result in a bearing which satisfy all of Trumpler’s design criteria.

Do you agree with your colleague that you can state that the 0.75 inch wide journal bearing would exceed Trumplers Design criteria and that no additional analysis is required? Justify your answer.

Solutions

Expert Solution


Related Solutions

A shaft cycles such that each bearing undergoes the radial loads of 30% of the time...
A shaft cycles such that each bearing undergoes the radial loads of 30% of the time at 20kN, 50% of the time at 25kN, and 20% of the time at 30kN. If the design life of a bearing is to be at least 5e6 revolutions, select the smallest 03 series cylindrical roller bearing that will accomplish this.
A journal and bearing are to be designed for a shaft that turns at 250 rpm....
A journal and bearing are to be designed for a shaft that turns at 250 rpm. Suppose ISO VG100 (SAE Engine 30) is to be used as lubricant and the bearing length is to be equal to 1.2 times the diameter. If the no-load power loss is not to exceed 2.5 x 10-4 horsepower and the diametral clearance is 0.0045 times the diameter, estimate the maximum diameter that can be used for the journal, and the allowable temperature limit.
A shaft inside the sleeve of a journal bearing is being rotated at 1500 rpm. The...
A shaft inside the sleeve of a journal bearing is being rotated at 1500 rpm. The shaft is 6.00 cm in diameter and is rotating in a bearing sleeve that is 6.02 cm in diameter and 40 cm long. The clearance is filled with oil having properties of ?=0.003 m2 /s and SG=0.88. a. Find the torque required to rotate the shaft. b. Find the power required to rotate the shaft. (Answer: 44.1 kW) c. Discussion: How do the torque...
all journal bearing has a shaft diameter=1.25in and suppports a load of 1200lbf. the bushing is...
all journal bearing has a shaft diameter=1.25in and suppports a load of 1200lbf. the bushing is 1.25-in long and has a bore diameter=1.25in. shfat speed=1500 rev/min. average film temperature=115.4o​F and SAE grade 30 lubricant is used. average clearance =0.001125 in. Find a) magnitud and location of min oil-film thickness b) total lubricant volumetric flow rate c) max oil-folm pressure and its angular location d) power loss
For a marine diesel engine application, a fluid-film journal bearing has a shaft diameter of 32...
For a marine diesel engine application, a fluid-film journal bearing has a shaft diameter of 32 mm and the length of the bearing is 24 mm. The bearing uses SAE grade 20 oil as lubricant and operates under a radial load. The inlet and outlet temperatures of oil are 50oC and 110oC respectively. It is assumed that because of the shearing action there is a uniformly distributed energy release in the lubricant that heats the lubricant film. During run-in operation,...
The J-shaped member shown in the figure is supported by a cable DE and a single journal bearing with a square shaft at...
The J-shaped member shown in the figure is supported by a cable DE and a single journal bearing with a square shaft at A. Determine the reaction forces A_y and A_z at support A required to keep the system in equilibrium. The cylinder has a weight W_B = 5.30 lb, and F = 1.20 lb is a vertical force applied to the member at C. The dimensions of the member are w = 1.50 ft, l = 6.00 ft, and...
The J-shaped member shown in the figure is supported by a cable DE and a single journal bearing with a square shaft a...
The J-shaped member shown in the figure is supported by a cable DE and a single journal bearing with a square shaft at A. Determine the reaction forces Ay and Az at support A required to keep the system in equilibrium. The cylinder has a weight WB = 5.80 lb, and F = 1.30 lb is a vertical force applied to the member at C. The dimensions of the member are w = 1.50 ft, l = 6.00 ft, and...
1. The journal entry to record the payment at maturity of an interest-bearing note is A....
1. The journal entry to record the payment at maturity of an interest-bearing note is A. debit Accounts Payable; credit Cash B. debit Notes Payable and Interest Receivable; credit Cash C. debit Notes Payable and Interest Expense; credit Cash D. debit Cash; credit Notes Payable 2. The entry to record the issuance of common stock at a price above par includes a debit to A. Common Stock B. Paid-In Capital in Excess of Par—Common Stock C. Cash D. Organizational Expenses...
The three Primary failure modes for concrete dams are: 1-Stability under acting loads 2-Load-bearing capacity (due...
The three Primary failure modes for concrete dams are: 1-Stability under acting loads 2-Load-bearing capacity (due to e.g. degradation or cracks) 3-Water-tightness Describe these-give the reason for when and how each of them Will occur?
1-A building requires a 100-foot long by 83-foot wide by 5-inch thick concrete slab. Using a...
1-A building requires a 100-foot long by 83-foot wide by 5-inch thick concrete slab. Using a waste factor of 10 %, Include calculations. a)determine the number of cubic yards of concrete needed to pour the slab. (2 points) 2-Determine the number of rolls of wire mesh needed if there are 750 SF of wire per roll and 12% of waste. Include calculations. (2 points) 9 BCT 2770 Estimating Fundamentals 3-Determine the amount of rebar needed for the slab if it...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT