The pumping unit is used to recover oil. When the walking beam ABC is horizontal, the force acting on wireline at the well head is 250 lb. Determine the torque M which must be exerted by the motor in order to overcome this load. The horse head C weighs 60 lb. and have center of gravity at Gc. The walking beam ABC has weight of 130 lb. and center of gravity at Gb , and the counterweight has weight of 200 lb. and center of gravity at Gw. The pitman , AD , is pin connected at the ends and has negligible weight.

The pumping unit is used to recover oil. When the walking beam ABC is horizontal, the force acting on wireline at the well head is 250 lb. Determine the torque M which must be exerted by the motor in order to overcome this load. The horse head C weighs 60 lb. and have center of gravity at Gc. The walking beam ABC has weight of 130 lb. and center of gravity at Gb , and the counterweight has weight of 200 lb. and center of gravity at Gw. The pitman , AD , is pin connected at the ends and has negligible weight.

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.20P: The 3600-lb car with rear wheel drive is attempting to push the 4500-lb crate. The center of gravity...

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