Cable drum for a crane is to rotate

Assignment Help Mechanical Engineering

Reference no: EM13714388

A cable drum for a crane is to rotate between 160 and 166 rpm. Design a gear drive for 25 hp in which the input pinion rotates at 925 rpm and the output rotates with the drum. The crane is expected to operate with a 50% duty cycle for 120 hours per week for at least 10 years. The pinion and the gear drive must fit within the 24-in inside diameter of the drum, with the gear mounted on the drum shaft. Assume that a number of pinion teeth, Np=17 and rim thickness factor (KB), a service factor (SF) and a reliability factor (KR) are equal to 1.00 for both pinion and gear. Perform stress analysis (bending and contact) for both pinion and gear and determine required hardness (HB) values.

Reference no: EM13714388

Questions Cloud

Determine the mass flow rate of air : Air enters a nozzle steadily at 50 psia, 160Â°F, and 155 ft/s and leaves at 14.7 psia and 900 ft/s. The heat transfer from the nozzle to surrounding air is estimated to be 6.0 Btu/lb of air flowing. The inlet area of the nozzle is 0.15 ft2. Based on ..

The heat of combustion of coal : A coal-fired power plant is producing 10,000 kW (=10 MW) of electrical power. If the plant has a thermodynamic efficiency of 28%, how many kilograms (kg) of coal are being burned per hour to maintain this output? The heat of combustion of coal is 36,..

A heat engine operates between reservoirs : A heat engine operates between reservoirs at 1000 and 300 K. Some of the power output from the heat engine drives a refrigerator which operates between 250 and 300 K. The heat-transfer input at 1000 K to the heat engine is 1000 kJ, and the heat trans..

Coal-fired power plant is producing : A coal-fired power plant is producing 10,000 kW (=10 MW) of electrical power. If the plant has a thermodynamic efficiency of 28%, how many kilograms (kg) of coal are being burned per hour to maintain this output? The heat of combustion of coal is 36,..

Cable drum for a crane is to rotate : A cable drum for a crane is to rotate between 160 and 166 rpm. Design a gear drive for 25 hp in which the input pinion rotates at 925 rpm and the output rotates with the drum. The crane is expected to operate with a 50% duty cycle for 120 hours per w..

Determine the minimum power requirement for the pump : The impeller of a centrifugal pump has inner and outer diameters of 14 and 37cm, respectively, and a flow rate of 0.18m3/s at a rotational speed of 1200rpm. The blade width of the impeller is 8.6cm at the inlet and 3.5cm at the outlet.

Calculate the force of impact on the skater : Let's say that one of the skaters in the above video has a mass of 100 kg, and is skateboarding at 9.0m/s when he smacks into a guardrail and comes to a complete stop in 0.2 seconds. Calculate the force of impact on the skater

How long will it keep before its activity is reduced : A 154.7 mCi sample of a radioactive isotope is purchased by a medical supply house. If the sample has a half-life of 14 days, How long will it keep before its activity is reduced

Determine the minimum possible final temperature of the gas : Air at 900 kPa and 300 C is expanded adiabatically in a closed system to 100 kPa. Assume constant specific heats. Also complete the problem assuming Variable specific Heats. Determine the minimum possible final temperature of the gas (isentropic case..

User Account

All Pages