PRODUCTIVITY of Hydraulic Excavators

(CONSTRUCTION APPLICATION)

1. Production per cycle (q)

q = q1 × K

where q1: Bucket capacity (heaped) (m3; yd3) K : Bucket fill factor

(1) Bucket fill factor

The bucket fill factor varies according to the nature of material. A suitable factor can be selected from the table, taking into consideration the applicable excavating conditions.

2. Cycle time (Cm)

Cycle time = Excavating time + swing time (loaded ) + dumping time + swing time (empty)

However, here we use cycle time = (standard cycle time) × (conversion factor)

The standard cycle time for each machine is determined from the following table.

3. Job efficiency (E)

The following table gives typical job efficiency as a rough guide. To obtain the actual production figure, determine the efficiency in accordance with actual operating conditions.

Sumber : Komatsu SHB_28

Powered by ScribeFire.