Page 80 - Reciprocating Compressors Operation Maintenance
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Design and Materials for Reciprocating Compressor Components 67
Jam Screw Lock to Crosshead. This arrangement uses several set
screws through the nut which bears against the face of the crosshead. It
also uses a set screw and copper disc through the nut and bears against
the piston rod threads (Figure 2-29A). A more modern version is shown
in Figure 2-29B.
Piston Rod Nut
Drilled Head ) Crosshead
Lockwire^ _^^ Set Screw I
xr.-^ . ._i
Soft Copper Compressor Piston Rod
Locking Plug
Hexagonal Piston Rod Nut-Locking Device
FIGURE 2-29A. Jam screw lock to crosshead (Source: Dresser-Rand, Painted
Post, New York).
Seating Pad
Multi-Jackscrews
FIGURE 2-29B. Multi-jackscrew ("Extractorque"™) rod-to-crosshead lock
nut (Source: Anglo Compression, Mount Vernon, Ohio).
