A large chipper/shredder is to be designed for use by commercial tree trimming companies It would be mounted on a trailer to pull behind a large truck. The rotating blades of the unit protrude from a large flywheel that is driven by a fluid motor that runs on medium machine tool hydraulic oil from a hydraulic system. This is a great application for a fluid motor given the extreme and sudden variations in torque and speed. An average of
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Applied Fluid Mechanics (7th Edition)
- Apply the grid method. A motor is being to used to turn the shaft of a centrifugal pump. Apply the equation shown in the image below to calculate the power in watts corresponding to a torque of 100 lbf-in and a rotation speed of 850 rpm.arrow_forwardA gear pump has a 75-mm outside diameter, a 55-mm inside diameter, and a 30-mm width. If the actual pump flow rate at 2700 rpm and rated pressure is 0.0025 m³/s. What is the volumetric efficiency?arrow_forwardIf a turbine that is to generate 15 hp under a head of 30 ft to drive a 700 rev/s generator is conventionally selected, what would be the specific speed of the needed runner?arrow_forward
- 1. Write in detail about working of any one hydraulic system application in construction area with neat diagram. 2. Illustrate the comparison between Electro-Pneumatic and Electro-Hydraulic Power system with application examples.arrow_forwardProblem 3: A Cavo loader has a hopper volume of 1 m3. The loader works for 2 shifts (8 hr/shift) with 1 hour break between the 2 shifts. The loader has to transport the muck to a distance of 25 m away from the face. Calculate the following: Calculate the total output for each shift. If the transporting distance increased to 75 m. How much is the reduction in the output rate. If a different Cavo loader with a hopper volume of 2.2 m3. How much is the increase in the output rate per shift.arrow_forward4. An electric motor is used to drive the shaft of a small water pump. During a performance test, the torque on the motor shaft is found to be 8.23Nm when the motor is drawing 716 W of electrical power. What is the rpm of the pump shaft if it has an efficiency of 76%?arrow_forward
- A gear pump has gears of 300 mm outside diameter, 150 mm inside diameter and 50 mm width. If the actual pump flow at 1800 rpm and rated pressure is 1000 liters per minute, what is the volumetric efficiency?arrow_forwardA Large wind turbine has blade span diameters of 110 m. It sits high off the ground where the average wind speed is 7 m/s. Assume the air density to be 1.25 kg/m3, and the efficiency of the wind turbine, its generator and its electric grid synchronization device is 26%. What is the average electric power that this turbine can output to the grid? a. Sketch the problem. b.Draw lines identifying the control volume, or control mass. c.Identify the states with numbers, letters, or descriptions such as “in” and “out”. d.Write down the knowns and unknowns. e.Identify what is being asked for. f.State all assumptions.arrow_forwardThe following data refer to a Pelton wheel: the bucket angle b=165°, the coefficient of discharge for the nozzle Cv = 0.98, the friction coefficient k = 0.2. Assume that the optimum speed ratio differs from 0.5 as a result of losses due to windage and bearing friction, which are proportional to the square of the rotational speed (take the proportionality constant equal to 0.2), obtain a formula for the optimum speed ratio, hence calculate it for the above given data and also calculate the maximum overall efficiency, in percentile. 30.3 59.4 O 42.5 83.2 O 116.5arrow_forward
- A pump has a displacement volume of 6 in^3. It delivers 24 gpm at 1000 rpm and 1000 psi. If the prime mover input torque is 1100 in • lb, what is the theoretical torque required to operate the pump in in-lbs?arrow_forwardA small model of a water pump with an impeller diameter of 8 in is able to develop a head of 15 ft and flow of 100 GPM when spun at 1200 RPM with a power input of 0.4 hp. If a larger model of the same pump with an impeller diameter of 24 in is to be used for another application where the required head is 80ft, at what speed (in RPM) should this larger model be ran, and at what capacity (in GPM) can it deliver water?arrow_forwardWhat is the displacement of a hydraulic motor receiving 18 gal/min at 1500 rev /min?arrow_forward
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