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Thermoacoustic stack-section spools: 2 in × 48.65, 58.65 and 68.65 mm (fabrication spec)
What custom tri-clamp spool holds a thermoacoustic stack as its own section? · Hardware · basis: Fabrication specs on standard 2 in ferrules (ISO 2852 faces as gen_hardware draws them, BPE tube Ø50.8 × 1.65); length = stack + ambient exchanger 10 + end spacer 8.4 + Type B lip 1.95 − 1.7 (the stack stands 1.7 into the hot joint's flat ring)
Long Earth Society build part. The stack section of my modular thermoacoustic engine. The engines
Exact dimensions. Every file is drawn at true size with no printing tolerance. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your printer's or process's clearance before making the part. Mating features
- sizes
- 3 in table
Notes
- A plain 2 in clamp × clamp spool, ordered from a sanitary fabricator to length, that makes the stack its own section: the stack stands on the hot exchanger in the section below, through the hot joint's flat ring; the ambient exchanger sits on the stack; an 8.4 spacer runs from the exchanger to the Type B gasket lip at the top face. Nothing is welded inside.
- The length is set so the column fits exactly: stack + 10 + 8.4 + 1.95 − 1.7. The ambient exchanger then sits 10.35–20.35 below the top face, so the 14 mm water jacket clamps over it at 9.35 mm from the face, clear of the joint's clamp.
- Spec line: '2 in × L mm clamp × clamp spool, tube Ø50.8 × 1.65, two standard 2 in ferrules'. The lower end runs at the hot exchanger's temperature: the builder checks the spool, the ring and the clamp at that temperature.
Sizes
| spool | face_to_face_mm | stack | stack_mm | ambient_exchanger_mm | end_spacer_mm | jacket_from_lower_face_mm |
|---|---|---|---|---|---|---|
| spool-2in-48.65mm | 48.65 | stack-spiral-2in-30-g1.0 | 30 | 10.0 | 8.4 | 25.3 |
| spool-2in-58.65mm | 58.65 | stack-spiral-2in-40-g1.0 | 40 | 10.0 | 8.4 | 35.3 |
| spool-2in-68.65mm | 68.65 | stack-spiral-2in-50-g1.0 | 50 | 10.0 | 8.4 | 45.3 |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance; leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| faces | ISO 2852 2 in, both ends (land Ø56.5–Ø64, rim 2.85, 1.6 recess, 20° back) | J1: flat hot ring + high-pressure clamp; J2: Type B gasket + high-pressure clamp | clamp | all |
| bore | Ø47.5 × face to face | stack, ambient exchanger disc and 8.4 end spacer | slide | all |
| tube outside | Ø50.8 between the ferrule hubs | water jacket and spool hanger bores Ø50.8 | clamp | all |
| length | 48.65 / 58.65 / 68.65 | stack + 10 + 8.4 + 1.95 − 1.7: the column fits to the J2 gasket lip | designed | all |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| ISO (via iTeh sample) | ISO 2852 clamp liners: face profile and flange / groove diameters | standard excerpt; dimensions are facts | |
| ASME | BPE Bioprocessing Equipment (tube OD and wall, clamp fittings) | standard | ASME; dimensions are facts verify |
| Xem Studio | tools/gen_ta_modular.py: the section geometry, the network model and every number on these pages | code | CC BY 4.0 |
| Long Earth Society | Engine builds | web, video | LES site |
Free files
★ Free files 3 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| spool-2in-48.65mm | 2 in × 48.65 mm clamp × clamp spool, ISO 2852 faces both ends, Ø47.5 bore: the stack section for a 30 mm stack (stack-spiral-2in-30-g1.0), the ambient exchanger and the 8.4 end spacer | STEP · STL |
| spool-2in-58.65mm | 2 in × 58.65 mm clamp × clamp spool, ISO 2852 faces both ends, Ø47.5 bore: the stack section for a 40 mm stack (stack-spiral-2in-40-g1.0), the ambient exchanger and the 8.4 end spacer | STEP · STL |
| spool-2in-68.65mm | 2 in × 68.65 mm clamp × clamp spool, ISO 2852 faces both ends, Ø47.5 bore: the stack section for a 50 mm stack (stack-spiral-2in-50-g1.0), the ambient exchanger and the 8.4 end spacer | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=thermoacoustic-stack-section-spools
How it fits
In these build lists
Modular free-piston thermoacoustic engine, 2 in…A standing-wave thermoacoustic engine built from 2 in sanitary sections like Leg…You might also need
Questions
Can I order these?
Yes: plain 2 in tube on two standard ferrules, cut to the length in the table.
Why three lengths?
One per stack length on this site (30, 40, 50 mm spiral stacks). A shorter stack gives more power and less efficiency (the modular engine's page compares them).