{"id":510,"date":"2025-08-18T07:13:11","date_gmt":"2025-08-18T05:13:11","guid":{"rendered":"https:\/\/la6cda.no\/?p=510"},"modified":"2025-08-18T17:28:17","modified_gmt":"2025-08-18T15:28:17","slug":"stoydemping-av-stromaggregat","status":"publish","type":"post","link":"https:\/\/la6cda.no\/?p=510","title":{"rendered":"St\u00f8ydemping av str\u00f8maggregat"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"869\" src=\"https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1191-1024x869.jpg\" alt=\"Kasse for demping av st\u00f8y\" class=\"wp-image-506\" srcset=\"https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1191-1024x869.jpg 1024w, https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1191-300x255.jpg 300w, https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1191-768x652.jpg 768w, https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1191.jpg 1234w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">En enkel kasse for \u00e5 dempe st\u00f8y fra str\u00f8maggregat<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Jeg skal kj\u00f8re contest fra Rakke.  Det er et friomr\u00e5de ved kyststien i n\u00e6rheten av Stavern.  Str\u00f8maggregatet lager en del lyd, og jeg tenkte at dersom jeg pakker det inn i en st\u00f8yisolert boks s\u00e5 vil st\u00f8yen reduseres.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Selve forbrenningsmotoren trenger luft, og selve generatoren og forbrenningsmotoren bruker luft til kj\u00f8ling. Dermed s\u00e5 vil ikke en slik boks virke med mindre den f\u00e5r inn nok luft. For \u00e5 sikre at den f\u00e5r luft har jeg kj\u00f8pt inn en liten r\u00f8rvifte som pumper ca 110 m3 i timen. R\u00f8rviften har 100 mm i utvendig diameter. Det er to utfordringer. Den f\u00f8rste er at jeg ikke har 100 mm hullbor. Den andre er at r\u00f8rviften m\u00e5 festes i veggen p\u00e5 en god m\u00e5te. L\u00f8sningen er \u00e5 skrive ut et r\u00f8r p\u00e5 3D printeren med en flens og et r\u00f8r som passer hullboret og r\u00f8rviftens utvendige diameter.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kassen har m\u00e5lene 0,6&#215;0,5&#215;0,8 m. Dette blir ca 250 liter. Viften pumper 1830 liter i minuttet. Det vil si at all luften i kassen skal v\u00e6re byttet ut ca 7,5 ganger i minuttet.<\/p>\n\n\n\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-8f761849 wp-block-group-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1185-768x1024.jpg\" alt=\"\" class=\"wp-image-507\" srcset=\"https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1185-768x1024.jpg 768w, https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1185-225x300.jpg 225w, https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1185-1152x1536.jpg 1152w, https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1185.jpg 1500w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><figcaption class=\"wp-element-caption\">R\u00f8radapter med vifte sett fra innsiden<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"942\" src=\"https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1186-e1755493532491-1024x942.jpg\" alt=\"R\u00f8rvifte adapteret.\" class=\"wp-image-508\" srcset=\"https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1186-e1755493532491-1024x942.jpg 1024w, https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1186-e1755493532491-300x276.jpg 300w, https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1186-e1755493532491-768x707.jpg 768w, https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1186-e1755493532491.jpg 1500w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">R\u00f8rvifteadapteret med r\u00f8rviften inni.  Jeg brukte opp diverse plastrester for \u00e5 skrive ut denne.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"853\" src=\"https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1192-1024x853.jpg\" alt=\"\" class=\"wp-image-503\" srcset=\"https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1192-1024x853.jpg 1024w, https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1192-300x250.jpg 300w, https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1192-768x640.jpg 768w, https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1192.jpg 1063w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Aggregatet<\/figcaption><\/figure>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Jeg har brukt IPhone for \u00e5 m\u00e5le st\u00f8yen.  Bakgrunnsst\u00f8yen i g\u00e5rdsplassen er ca 27dBA.  Da jeg m\u00e5lte med st\u00f8ykassen fikk jeg ca 72 dBA og uten st\u00f8ykassen ca 84 dBA.  <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jeg m\u00e5lte ca 2 meter fra kassen, p\u00e5 samme punktet med og uten kasse.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Her er videoer av aggregatet med og uten kasse.  <\/p>\n\n\n\n<figure class=\"wp-block-video\"><video height=\"1080\" style=\"aspect-ratio: 1920 \/ 1080;\" width=\"1920\" controls src=\"https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1188-1.mp4\"><\/video><figcaption class=\"wp-element-caption\">Med st\u00f8ykasse<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-video\"><video height=\"1080\" style=\"aspect-ratio: 1920 \/ 1080;\" width=\"1920\" controls src=\"https:\/\/la6cda.no\/wp-content\/uploads\/2025\/08\/img_1189-1.mp4\"><\/video><figcaption class=\"wp-element-caption\">Uten st\u00f8ykasse<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Jeg ser an v\u00e6ret i morgen. Planen er \u00e5 f\u00e5 kj\u00f8rt, men for \u00f8yeblikket er v\u00e6rmeldingen slik at det blir ganske mye vind.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Jeg har laget en st\u00f8ydempingsboks for str\u00f8maggregat.<\/p>\n","protected":false},"author":1,"featured_media":506,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,19,18,1],"tags":[49,44],"class_list":["post-510","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-3d-print","category-bygging","category-pludring","category-ukategorisert","tag-3d-print","tag-bygging"],"_links":{"self":[{"href":"https:\/\/la6cda.no\/index.php?rest_route=\/wp\/v2\/posts\/510","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/la6cda.no\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/la6cda.no\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/la6cda.no\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/la6cda.no\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=510"}],"version-history":[{"count":6,"href":"https:\/\/la6cda.no\/index.php?rest_route=\/wp\/v2\/posts\/510\/revisions"}],"predecessor-version":[{"id":519,"href":"https:\/\/la6cda.no\/index.php?rest_route=\/wp\/v2\/posts\/510\/revisions\/519"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/la6cda.no\/index.php?rest_route=\/wp\/v2\/media\/506"}],"wp:attachment":[{"href":"https:\/\/la6cda.no\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=510"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/la6cda.no\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=510"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/la6cda.no\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=510"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}