IṢẸ́ ỌNÀ
ẸWÀ ÀTI ÌLERA
IṢẸ́ ỌWỌ́
ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
SÁYẸ́ǸSÌ
ERÉ ÌDÁRAYÁ
ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
Strain-Gauge Load Cell with Floating Piston: Ruge, 1949
Arthur C. Ruge of Cambridge, Massachusetts, one of the two inventors of the bonded wire strain gauge, patented this load weighing cell in 1949, US 2,472,047 (filed 1946). Tanks, bins and scales rest on such cells so the weight of their contents can be read at any time. A floating piston, held in a heavy shell by two diaphragms, passes the load straight down onto a column carrying bonded strain gauges, so tilted, off-centre and twisting loads barely affect the reading. The gauges' change of resistance can be read on a Wheatstone bridge.
Ilọsíwájú
Workshop process
Ìlànà
1
1
Base and shell
Base and shell
Weld a rigid, preferably cylindrical shell to a relatively heavy base, or secure it some other way.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ìpìlẹ̀ àti Àpò Oníyípo Sẹ́ẹ̀lì Ẹrù1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìtanná-ìdàpọ̀ (arc welder)2
2
Load column and gauges
Load column and gauges
Screw the lower end of the load-sensitive column rigidly to the base; round its upper end to a half-sphere. Bond wire strain gauges to its surface at several points around it, so bending cancels out, and mount gauges of the same type crosswise for temperature compensation. The column may be round, but square, solid or hollow, makes the gauges easier to apply. Its capacity is set by its cross-section and the stiffness of its material.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Òpó Tí Ń Mọ Ẹrù Lára1 ẹyọ
Ìwọ̀n Ìnà Oníwáyà Tí A Lẹ̀ Mọ́1 ìtòÀwọn irinṣẹ́ tí a nílò:
Ìṣù àwọn ohun ìyí skurú3
3
Floating piston
Floating piston
Bore the piston so the column reaches up inside it and its rounded end bears on the end of the bore. Centre the piston in the shell with two annular diaphragms, upper and lower, welded or brazed to piston and shell: widely spaced, they let it move freely up and down but resist side loads and off-centre loads.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Písítọ̀ọ̀nù Ẹrù Tí Ń Léfòó1 ẹyọ
Awọ Tínínrín Ìtọ́sọ́nà Oní-òrùka2 ẹyọÀwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ Ìyí IrinẸ̀rọ ìtanná-ìdàpọ̀ (arc welder)4
4
Overload ring and leads
Overload ring and leads
Set a safety ring under the piston with a small clearance: past a safe load, the piston lands on it and the excess goes straight to the base. Bring the gauge leads down through a hole in the ring and out through the lower diaphragm to an external cable. The gauges may be wired as a Wheatstone bridge. The cell can be sealed all round by brazing, or potted.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Òrùka Ààbò Ẹrù Àṣejù1 ẹyọ
Kébù Sẹ́ẹ̀lì Ẹrù1 ẹyọ
Wáyà Sọ́ldà1 as requiredÀwọn irinṣẹ́ tí a nílò:
Irin Sọ́ldà Oníná Mànàmáná
Ẹ̀mú ìbóhun5
5
Zero check
Zero check
To read the zero without moving the tank, seat a fixed ball race on top of the shell and a turning race above it, with balls between on a slightly inclined cam surface and a second row of balls under the loaded surface. Turning the upper race with a bar or spanner lifts the load a few thousandths of an inch off the piston; read the bridge, then turn it back.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ọ̀nà Bọ́ọ̀lù Oníkámù Méjì1 ẹyọ
Àwọn bearing bọ́ọ̀lù irin1 ìtòÀwọn irinṣẹ́ tí a nílò:
Kọ́kọ́rọ́ tí a lè ṣàtúnṣeÀwọn ohun-èlò
10- 1 ẹyọÀyè
- Àyè
- Àyè
- Àyè
- 1 ẹyọÀyè
- 1 ẹyọÀyè
- 1 as requiredÀyè
- Àyè
- Àyè
Àwọn irinṣẹ́ tó nílò
6- Àyè
Ìtọ́nisọ́nà yìí ń ṣe
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