Xem Studiomeasured geometryTri-clamp elbow diaphragm alpha, 2 in
A torch-heated alpha in 2 in tri-clamp: a square of fittings with a diaphragm head on each tee branch and both rods on one crank pin at 90°.
2 in · two diaphragms at 15 mm stroke, 14.2 mL each, 90° on one pin · dead volume 478 mL with the fillers (1228 without) · swept / dead 0.030
Exact dimensions. Every part is drawn at true size with no printing tolerance; each part's page lists its mating features and the fit each joint needs, so open those by your process's clearance before making the parts.
43 parts, every one a file here · all STL URLs · Markdown · tick lines as you go (saved in this browser)
| subsystem | object | parts | qty | note | |
|---|---|---|---|---|---|
| None | Frame for the 2 in tri-clamp elbow diaph | alpha-frame-2in STEP · STL | 1 | base, two feet, diagonal strut, bearing block | |
| None | Torch stand for a horizontal tri-clamp h | torch-stand-40 STEP · STL | 1 | under the middle of the hot spool; the heat source is a torch flame | |
| None | Socket head cap screws | shcs-m4x20 STEP · STL | 2 | torch stand to the frame | |
| None | Sanitary clamp elbows | elbow-90-2in STEP · STL | 1 | the corner: hot leg to cold leg | |
| None | Sanitary clamp spools | spool-2in-3in STEP · STL | 2 | hot leg (over the flame) and cold leg (cooler) | |
| None | Sanitary clamp tees and short-outlet tee | tee-short-2in STEP · STL | 2 | hot tee (branch up) and cold tee (branch inward) | |
| None | Tri-clamp end cap | tc-cap-2in-flat STEP · STL | 2 | close the tees' runs | |
| None | Tri-clamp flat gasket (hot joint | hot-gasket-2in STEP · STL | 2 | both hot-spool joints | |
| None | Tri-clamp heat shield washer | heat-shield-2in STEP · STL | 2 | on the hot spool, flame side of each clamp | |
| None | Tri-clamp gasket | tc-gasket-2in STEP · STL | 4 | cap joints, elbow–cold spool, cold spool–cold tee | |
| None | Tri-clamp clamp | clamp-half-2in STEP · STL | 16 | eight joints, two halves each | |
| None | Socket head cap screws | shcs-m5x30 STEP · STL | 16 | clamp bolts | |
| None | Hex nuts | nut-m5 STEP · STL | 16 | clamp nuts, in the hex traps | |
| None | Regenerator cage for 2 in and 1.5 in tri | regenerator-cage-47-5x40 STEP · STL | 1 | in the cold spool at the elbow joint, on the gasket lip | |
| None | Regenerator matrix disc Ø44 / Ø32 × 0.5 | mesh-disc-44mm STEP · STL | 80 | fill the cage, 40 mm | |
| None | Tri-clamp volume fillers | plug-tee-2in-blind STEP · STL | 2 | fill both tee runs; passage from the spool side to the branch | |
| None | Tri-clamp volume fillers | sleeve-2in-76.2 STEP · STL | 1 | hot spool: 1 mm heater gap | |
| None | Tri-clamp volume fillers | sleeve-2in-32 STEP · STL | 1 | cold spool above the regenerator: 1 mm cooler gap | |
| None | Tri-clamp finned cooler | cooler-half-2in-56 STEP · STL | 2 | on the cold spool; or the jacket shell | |
| None | Socket head cap screws | shcs-m4x30 STEP · STL | 4 | cooler (or jacket) ears | |
| None | Hex nuts | nut-m4 STEP · STL | 6 | cooler (or jacket) ears (4), torch stand (2) | |
| None | Tri-clamp jacket shell | jacket-half-2in-56 STEP · STL | 2 | optional, in place of the finned cooler | |
| None | Tri-clamp jacket shell | jacket-port-cap STEP · STL | 2 | optional, one per jacket half | |
| None | Tri-clamp diaphragm head | diaphragm-head-2in STEP · STL | 2 | hot (up) and cold (inward) | |
| None | Tri-clamp diaphragm membrane | membrane-2in STEP · STL | 2 | clamped in place of the gaskets | |
| None | Tri-clamp diaphragm centre disc and back | diaphragm-disc-2in STEP · STL | 2 | head side of each membrane, carries the rod | |
| None | Tri-clamp diaphragm centre disc and back | diaphragm-backing-2in STEP · STL | 2 | gas side of each membrane | |
| None | Socket head cap screws | shcs-m2x8 STEP · STL | 6 | three per membrane | |
| None | Hex nuts | nut-m2 STEP · STL | 6 | three per membrane | |
| None | Displacer rods Ø2 × 60 | rod-3x150 STEP · STL | 2 | diaphragm rods | |
| None | Rod clevises for a Ø2 or Ø3 rod or a Ø5 | rod-clevis-3mm STEP · STL | 2 | one per rod | |
| None | Connecting rods 30 to 80 mm centres with | conrod-50 STEP · STL | 2 | both on the one crank pin | |
| None | Ball bearings | bearing-623 STEP · STL | 4 | con-rod eyes | |
| None | Dowel pins | dowel-3x20 STEP · STL | 2 | clevis pins: each con-rod sits beside its clevis on the pin | |
| None | Dowel pins | dowel-3x30 STEP · STL | 1 | crank pin | |
| None | Counterweighted crank discs | cw-crank-disc-stroke15 STEP · STL | 1 | 15 stroke, one pin | |
| None | Crankshafts Ø3 | crankshaft-5x80-dflat STEP · STL | 1 | ||
| None | Ball bearings | bearing-625 STEP · STL | 2 | in the strut's bearing block | |
| None | Set-screw shaft collars Ø3 to Ø12 | collar-5mm STEP · STL | 2 | either side of the bearing block | |
| None | Flywheels Ø100–Ø200 with hex-nut rim poc | flywheel-150-m10-b5 STEP · STL | 1 | behind the bearing block | |
| None | Hex nuts M8 | nut-m10 STEP · STL | 18 | one in each rim pocket | |
| None | Set screws (grub screws) | set-m3x4 STEP · STL | 8 | grubs: 2 diaphragm discs, 2 clevises, crank disc, 2 collars, flywheel | |
| None | Set screws (grub screws) | set-m4x10 STEP · STL | 3 | centre the torch head in the stand ring |
Assembled engine
Torch-heated alpha Stirling engine in 2 in tri-clamp fittings: a square of elbow, spools and tees with a clamped diaphragm on each tee branch driving one crank pin at 90°, 430 × 143 × 500 mm.
Assembly STEP (2.6 MB) · STL (11.6 MB) · 235 parts
Build order
- Frame on the bench; torch stand on the frame.
- Elbow on its foot. Cold side: Type B gasket, regenerator cage with its mesh on the lip inside the cold spool, sleeve above it, clamp; cooler halves on the spool; Type B gasket, cold tee (branch toward the crank), tee plug from the spool end, Type B gasket, cap, clamps.
- Hot side: hot gasket, hot spool with its sleeve, hot gasket, hot tee (branch up) with its plug, Type B gasket, cap, clamps; heat shields on the spool next to both hot clamps.
- Diaphragms: backing disc, membrane, centre disc and three M2 × 8 each; Ø3 × 150 rod in each boss; membrane on the branch, head over the rod, clamp.
- Crankshaft through the bearing block with collars, flywheel with its nuts, crank disc with the Ø3 × 30 pin; each con-rod beside its rod clevis on a Ø3 × 20 pin; both big ends on the one crank pin.
Agents: each row's object has /api/geometry?object=slug and the MCP tool get_free_files; the STL list above is every part.
JSON: /api/geometry?object=list-tri-clamp-elbow-diaphragm-alpha