Aux 2 Unit 2 Hydraulic crane

1. The operating hydraulic circuit for a luffing cylinder for a deck crane is shown in the figure. Explain the purpose and describe the operation of EACH item A, B and C.
   (10) Fig Q1

Aux 2 Unit 2 Q1

Aux 2 Unit 2 Quiz 1

Answer

1. With reference to a crane operated by a constant pressure hydraulic system incorporating unidirectional, fixed displacement pumps that run continuously, explain EACH of the following:
   (a) the purpose of the accumulator;(2)
   (b) how the hydraulic pressure is regulated;(2)
   (c) how the speed and direction of the hoist motor is varied;(3)
   (d) how the torque available from the hoist motor can be varied.(3)

Aux 2 Unit 2 Q2

Aux 2 Unit 2 Quiz 2

Answer