Highly detailed CAD-style technical drawing of a triple-expansion piston expander with three cylinders, crankshaft, rotary variable valves, and phase adjustment mechanism, depicted in orthographic views.

A highly detailed CAD-style technical drawing of a triple-expansion piston expander for an Organic Rankine Cycle (ORC). The machine has three cylinders (HP, IP, LP) arranged in line on a single crankshaft with three crank throws at 120 degrees. Each cylinder is equipped with rotary variable admission and exhaust valves (RVAV), phase-locked to the crankshaft. The RVAV system uses a mechanical phase adjustment mechanism based on curved slots and drive pins (slot-and-pin cam phaser). Each valve has: - a driving plate rigidly connected to the crankshaft timing system, - a driven plate connected to the rotary valve shaft, - three hardened steel pins engaging curved arc-shaped slots, - a brushless servo motor acting through a lever linkage to adjust the angular phase, - mechanical end stops limiting phase adjustment to ±30 degrees, - a torsion spring providing fail-safe return to the default position. The drawing should look like a professional mechanical CAD drawing: - orthographic view (front, side, top), - clean white background, - black technical lines, - visible shafts, gears, pulleys, timing belt, and phase adjustment mechanism, - clear separation of crankshaft, cylinders, valves, and phase adjusters, - no artistic shading, no colors, no perspective distortion, - realistic industrial proportions. Style: precise mechanical engineering drawing, similar to SolidWorks or AutoCAD technical documentation. See more