SU1204533A1 - Method of reducing water absorption of logs in floatage - Google Patents
Method of reducing water absorption of logs in floatage Download PDFInfo
- Publication number
- SU1204533A1 SU1204533A1 SU843776447A SU3776447A SU1204533A1 SU 1204533 A1 SU1204533 A1 SU 1204533A1 SU 843776447 A SU843776447 A SU 843776447A SU 3776447 A SU3776447 A SU 3776447A SU 1204533 A1 SU1204533 A1 SU 1204533A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- logs
- alloy
- water absorption
- reducing water
- floatage
- Prior art date
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- Chemical And Physical Treatments For Wood And The Like (AREA)
Description
Изобретение относитс к лесной и деревообрабатывающей промышленности и может быть использовано при подготовке лесоматериалов к сплаву.The invention relates to the timber and woodworking industry and can be used in the preparation of timber for rafting.
Цель изобретени - увеличение срока сплава бревен, снижение трудозатрат и энергоемкости при подготовке бревен к сплаву.The purpose of the invention is to increase the duration of the alloy logs, reducing labor costs and energy intensity in the preparation of logs for the alloy.
Каждое бревно перед пуском в сплав закрепл ют по его центру т жести на опоре, затем к обоим концам бревна прикладывают силовую нагрузку и вращают его с переменной угловой скоростью вокруг своей оси.Before launching each log, each log is fastened on its center to a sheet on a support, then a force is applied to both ends of the log and it is rotated with a variable angular velocity around its axis.
При изгибе бревна нижние волокна раст гиваютс , верхние сжимаютс . В середине находитс нейтральный слой. Раст жение и сжатие не равномерны по длине бревна: максимальны по середине бревна и равны нулю по кра м.When the log is bent, the lower fibers are stretched, the upper ones are compressed. In the middle is a neutral layer. Stretching and compression are not uniform along the length of the log: maximum in the middle of the log and equal to zero along the edges.
В зоне раст нутых волокон капилл ры сужаютс за счет поперечной деформации, что повышает давление жидкости в них. ПриIn the zone of the stretched fibers, the capillaries constrict due to transverse deformation, which increases the fluid pressure in them. With
этом жидкость через поры просачиваетс в капилл ры с меньщим давлением. При изгибе наибольщее удлинение волокон (капилл ров ) происходит в област х, наиболее удаленных от нейтральной оси, следовательно, жидкость из периферийной области будет перекачиватьс в центральную по диаметру и с середины бревна к торцам бревна, через которые и будет удал тьс . Таким образом происходит частичное удаление жидкости из бревен.In this way, the fluid through the pores seeps into the capillaries with less pressure. During bending, the greatest elongation of the fibers (capillaries) occurs in the areas furthest from the neutral axis, therefore, fluid from the peripheral region will be pumped into the central diameter and from the middle of the log to the ends of the log through which it will be removed. Thus, partial removal of the liquid from the logs occurs.
При вращении бревна все элементы древесины наход тс в услови х знакопеременных напр жений. При перемещении капилл ров из раст нутой зоны в сжатую их объем увеличиваетс , давление жидкости в них падает и происходит засасывание воздуха через стенки капилл ров из атмосферы.When the log is rotated, all elements of the wood are under alternating stress conditions. As the capillaries move from the stretched zone to the compressed volume, their volume increases, the pressure of the fluid in them drops and air is sucked through the walls of the capillaries from the atmosphere.
Дл древесных пород наличие 50-100 пузырьков воздуха в капилл ре делает его нё- проводимым дл жидкости.For tree species, the presence of 50-100 air bubbles in the capillary makes it non-fluid.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU843776447A SU1204533A1 (en) | 1984-07-16 | 1984-07-16 | Method of reducing water absorption of logs in floatage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU843776447A SU1204533A1 (en) | 1984-07-16 | 1984-07-16 | Method of reducing water absorption of logs in floatage |
Publications (1)
Publication Number | Publication Date |
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SU1204533A1 true SU1204533A1 (en) | 1986-01-15 |
Family
ID=21133042
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU843776447A SU1204533A1 (en) | 1984-07-16 | 1984-07-16 | Method of reducing water absorption of logs in floatage |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU1204533A1 (en) |
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1984
- 1984-07-16 SU SU843776447A patent/SU1204533A1/en active
Non-Patent Citations (1)
Title |
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Авторское свидетельство СССР № 480551, кл. В 27 К 1/02, 1975. * |
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