چكيده فارسي :
The concept “Pneumatic Shifter mechanism” is a
design of an Air-forced shifting mechanism that
connects and disconnects two rotating shafts of DWS1
and ECB2.
On drilling Rigs, DSC3 is used to transfer power
between DWS to ECB. Generally DSC comes in line at
condition of ‘Tripping down’ and ‘Rig up (or down)’ to
control the rotational speed of drum shaft of DWS by
eddy braking power of ECB. A hand-operated lever
connects and disconnects DSC to transmit power
between DWS and ECB. These types of operation can
potentially increase the risk to Manpower and
Equipment of Drilling Rig.
My designed shifter system is a unitized mechanism
with two-way-shifting position that can easily be
removed or assembled on skid of ECB. By this
mechanism, DSC will be changed into air-shiftedsystem
from a manually-levered-shifter. Aside it,
designed interlock allows only one air-operated valve
be in line at a time to avoid from conflict and interface
with other valves of DWS.
The designed mechanism obtains minimum backlash
and reduces impact or shock loads as compared to the
manual type. All technical drawings, mechanical
design, calibration, calculation, assembling, and
simulation carried out by software SOLIDWORKS-
2010. Synthesis & analyze of elements provided by
software package “ARTAS-SAM”. Pneumatic circuits,
cylinder, pressure lines and valves are designed and
simulated by FESTO’s software: FLUID-SIM.
