??????????????????????????????????——PE ??polyethylene????????????????????ò???????????????????????????????
????PE?????????????? ???? ?????? ?????????????????????PE???????????????????????????????????????????????????????????????????????????????PE?????????????????????????????????????????????????????????? ????????????????????? ????????????±???????????? ???????????塣
??????? ?????????????????????????????￡?
???????????????μ???????????
?????????????????? ???????????????????????????????? ????????????
???????趨????????200??230?? ?????????????????е????????????ο?????????????????????????????
????????????????? ??????塢?????????????????С?
???????? ???????????????????￡?????????????→?????→?????????→??????λ????→????????????С?????→?????????????涨???→????????????????У? ?????????????????????????????в???????????????? ???????????????????仯????????????????
????????????????????????????????????????????п??????????? ?????????????????10% ?? ????о???г?????????
???????????????????????????????????
????????????????????????????? ?????????????????????????????????????????????????20~30mm?? ?? ????????????????????????? ???????????????????????????? ????????????
??????????????? ?????????????? ??????￡???????? ???????????????? ?????????????????м???????м????0.5??10mm?? ?????????????????????м???? ?? ????????? ????????????????????????????
?????????????? ??￡?????? ????????????????????????λ?????????????10% ??????????????????????????????? ?????????????????????0.3mm??de225mm???￡???0.5mm??de225mm~400mm????1mm??de400mm????????粻??????????????????????????
???????????????趨??????????????涨????????????????С?????涨???????????С???涨???????????????????????????????????????????????????????????????壬????￡?????????л???価?????????????涨????ж?????????????????????????
??????????????????????????й?????????????????????????????????????????????????????????
????????????????
???e/mm ??
???????????h/mm ????T??????210±10???????????Pa1??0.15MPa ??
???????ta2/S ta2=10×e ????T??????210±10???????????Pa2??0.02MPa ??
????????л????tu/S??
??????tf1/S ??
???????????μ???????tf2/min Pf1=Pf2=0.15MPa ??
??4.5??
0.5??
45??
5??
5??
6??
4.5??7 ??
1.0 ??
45??70 ??
5??6??
5??6??
6??10 ??
7??12??
1.5??
70??120??
6??8??
6??8??
10??16??
12??19??
2.0??
120??190??
8??10??
8??11??
16??24??
19??26??
2.5??
190??260??
10??12??
11??14??
24??32??
26??37??
3.0??
260??370??
12??16??
14??19??
32??45??
37??50??
3.5??
370??500??
16??20??
19??25??
45??60??
50??70??
4.0??
500??700??
20??25??
25??35??
60??80??
????Pa1 ??????? pa2 ??????? pf1 ?????? pf2 ?????? ta1 ???????Tu ?л????????????峷????? tf1 ?????? tf2 ??????
???????????????????????????????????????????й????λ????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????
??????1??????????????????????????????????????????????????????????п??????????顣
??????2???????????????????????????
??????3?????????????{bfb}???С???????????λ?????????????????????????????????飬???????????????????10%????????????????????????5????
??????4????????????????????????飬???????????????????3%????????鲻????1???????????????????г?4??????????????????δ??????????????????????????飬????????????????????淶?????????????????ú?????????м?????.
???????????????????? ??????????? ?????13812183766 ???棺0510-84088176 ??
