Tính toán thiết kế nòng súng ngắn bắn dưới nước

NGHIEN cufu - TRAO Ddi TINH TOAN THI^T K^ NONG SUNG NGAN BAN DUdl NUdC CALCULATION AND DESIGN BARREL OF UNDERWATER GUN TS Dao Van Doan Khoa Vii Hoc vien Ky thuat Qu3n sir TOIVI TAT Bai bdo trinh bay phucmg phdp tinh todn thiet ke nong sung ngdn bdn duoi nuac Ket qud bdi todn lam ca sa cho qud trinh nghien ciru thiet ke che tao siing vd dgn bdn dual nuac Tir khoa: Nong sung; Sting bdn ditai nuac; Budng dan ABSTRACT This paper presents a computational method designed barreled underwater Results of the problem as a basis for the study design and manufacture of underwater gum and underwater ammunition Keywords: Barrel; Underwater gun; Chamber l.DATVANDE xay dung mo hinh va giai bai toan thuat phong [2], thuat phong ngoai [3], da xac dinh Nghien cim thiet Ice, che tao sung va dupe mot s6 dac di6m va tham s6 cila nong dan ban duoi nuoc hien dang la mot nhiem sung ban duoi nuoc nhu: vu moi va cap bach de trang bi cho luc lugfng dac cong nguoi nhai va cac don vi dac nhiem - Nong Sling ngan ban duoi nuoc la loai ciia Hai Quan Khi tinh toan thi^t k^ sung bSn nong tron, co 5,7mm va chiSu dai nong la 260 duoi nuoc thi viec thiet ke nong siing la vSn d8 mm; dupe dat len hang dSu, vi nong la chi ti8t quan trpng nhat quySt dinh den tinh nang, chit lupng - Dinh vi dan buong dan bing vai va mdi tho cua sung Sau nghien cuu mo dan, sii dung loai v6 li6u 5,56x45 mm c6 kich hinh chuyen dpng cua dan bjn duoi nuoc [1], thu6c nhu hinh ISSN 0866 - 7056 TAP CHi CO KHf V I £ T NAM, S6 1+2 nam www.cokhivietnam.vn 2015 NGHIEN cufu-TRAOedi Hinh Kich thu&c vo lieu 5,56x45 mm Dya tren cac ket qua do, bai bao di sau nghien ciiru tinh toan thiet ke kich thudc long nong va kich thudc ben ngoai nong Dp nho cua vien dan ngoai buong dan K phai chpn cho khoang each giiia mat guong kh6a nong vdi mat dinh vi ciia buong dan cd gia tri Idn nhat, mat ciia day vd dan khong nh6 khoi mat sau cua nong Theo [4] chpn lupfng nho khoi buong dan ciia vo dan K = 3,13 mm va cac c6ng thiic tinh cac kich thudc Aa, Ab nhu sau; -.7,715.0,008 cot23''=0,0727 Trong do: TINH TOAN THIET KE LONG NONG + d^ ^ 7,715 mm - Dudng kinh trung binh cua vo dan d vai dan; SUNG BAN Dir6l NlTOfC + Ap ^ 0,008 mm - Khe hd hudng tam tuong doi Tinh toan thiet ke long ndng siing trudc giiia vo dan va buong dan; het phai thiet ke bu6ng dan Kich thudc buong + a = 46" - goc chuyen tiep ciia buong dan dan chpn theo kich thudc vo dan nham dam Chpn: A^ = mm ta dupfc cac kich thudc bao cho viec nap dan vao buong dan duac de dang cae sai l^ch kich thudc nam dai cua buong dan: khoang dung sai Viec lap ghep dan vao bu6ng dan phai dam bao bit kin thuoc va dam bao dp b6n cua vo dan ban b^-b^-K-Aj, c^ = c^-K-\ Kich thudc dpc true ciia budng dan Trong do, cac kich thudc a^, b^, c^ lay dup'c xac dinh theo loai v6 dan va phuang phap dinh vi dan buong dan Do d6 kich thudc theo kich thudc vo lieu: budng dan dugc xac dinh theo kich thudc vo lieu 5,56x45mm va theo phuang phap dinh a^-36,02 mm b^-39,05 mm c^ = 44,20 mm vi dan bang vai dan, nen so tinh toan kich thudc bu6ng dan duac thyc hien theo hinh Thay s6 ta nhan dugc ket qua: [4] d^ = 32,79 mm; b^, = 36,47 mm; c^, = 42,05 mm / / / / ^/ / _[c: //iL ggm Hinh Sa dnh todn buong dgn Chgn cac kich thudc : d^ ^41,95 mm, e^^ 49,15 mm Kich thudc ngang buong dan xac dinh theo kich thudc vo dan c6 tinh den khe hd ban dkn [4]: ^ ISSN 0866 7056 TAP CHi CO KHi V I £ T NAM, S6 1+2 nam 2015 ww^v.cokhivietnam.vn NGHIEN cufu-TRAO DOI d^,= (1+A^,).d^ 2) Xay dyng dudng cong ap suat thuoc Idn nhat tac dung vao ndng (dudng Tai cac ti^t dien d =9,58 va mm taco cong bao hinh) Tren co sd quy luat ap suat kich thudc tuong iing dj^=9,68 va 8,59 mm thuat phong theo chi6u dai ndng da dugc tinh toan theo [2], ta chi can ve d6 thi p'^^^Cl) va Vdi kich thudc ngang long nong ph^n n6i dilm p^^ song song vdi true hoanh, dich din hudng la 5,7 mm ta co kk cdu long nong diSm p^^ v6 phia dIu nong khoang 2d (hmh 5) nhu hinh Hinh Ket cdu long nong sung bdn du&i nuac TINH TOAN THIET KE KICH THlTdC BEN NGOAI NONG Hinh Cdc du&ng cong dp sudt vd du&ng cong site ben 3) Xay dyng quy luat ap suat ben mong Nhiem vu ciia tinh toan thiet ke kich thudc ben ngoai ndng la xac dinh chilu day mu6n (hinh 5) bang each nhan tung dp cua dudng ap suat Idn nhat vdi he s6 an toan n theo ndng de dam bao dp ben ciia nong ban Thii tu tinh toan thiet ke kich thudc ben chieu dai nong (hinh 6) ngoai nong nhu sau [4]: 1) Chia chieu dai nong cac doan vdi cac mat cat nhu hinh Budng dgn Hinh Quy ludt xdc dinh he so an todn theo chi ddi nong 4) Xac dinh dudng kinh ngoai cua ndng Hinh Mat cdt cua nong vd cdc vi tri quan trpng Xac dinh dudng kinh ngoai ciia nong d cac tiet dien: Tiet dien day ndng - , tilt dien ISSN 0866 - 7056 TAP CHi CO KHi VIET NAM, S6 1+2 nam 2015 www.cokhivietna m.vn NGHIEN cufu-TRAO Ddi - 2, - 3, - va tilt dien mieng ndng - (hinh 4) Cac dudng kinh dugc xac dinh theo cong thiic sau [ ] : d,=d, 3a^ + 2p 3cr^ - 4p Trong do; + o^ - Gidi han ty le ciia vat lieu ndng Vdi vat lieu ndng siing ban dudi nudc la thep 30XH2MOA cd gidi han ti le o^ - 785 MPa; + p ' - Ap suat thuoc theo dudng cong siic ben mong muon Ket qua tinh toan dudng kinh ngoai ndng theo bang Bang Tilt dif n 1-1 2-2 3-3 4-4 5-S d, (mm) 9,68 5,7 5,7 5,7 5.7 p' (MPa) 271 95 307,5 174 15 103 125 88 425 d-2 (mm) 14.64095 261404 7,277418 6.545161 6.411177 Nhd vay, ta nhan dugc hinh dang kich thudc ben ngoai nong nhd hinh Hinh Kich thUdc ben ngodi sau hieu chinh vd cum 04 nong KET LUAN Bai bao da trinh bay phuang phap tinh toan thiet ke nong siing ngan ban dtfdi nydc Ket qua cua bai toan la cO sd cho viec nghien cdu tinh toan thiet ke ch^ tao dong bg siing va dan ban dudi nUdc va noi dung bai bao chinh la mgt phan nghien ciiu de tai khoa hgc tiem nang cap Nha nUdc ma sd KC.03.TN08/11-15 "Thiet ke ch^ thii d6ng bg siing va dan bdn dddi niidc trang bi cho bp dpi dac cong niidc".*t* Ngay nhan bai: 08/01/2015 Ngay phan bien: 25/01/2015 Tai lieu tham khao: Hmh Kich thUdc ben ngodi nong trUdc Ichi hiiu [ij Dao Van Doan Ha Huy Nguyen, Nguyen Van HUng, Mai chinh Bi dam bao kieu dang va tinh cdng nghe, thiet ke che tao siing ngan 04 ndng ban ty dpng diidi nUdc, thUc te ta tien hanh ghep 04 ndng cum bang hai bac nong trUdc va sau, thUc hien dieu chinh lai cac kich thitdc ben ngoai nong va cym nong theo nguyen tac tang ben hdn ta diigc kich thudc va hinh dang thyc te cua nong siing nhU hinh Quoc Chien, Nguyin Sy Hoa Mo hinh tinit todn sU chuyen dgng cua dan Ichi bdn dudi nUdc, Tap chi Khoa hoc va Ky thuat (Hoc vien KTQS) so 145 (12-2011) [2] Dao Van Doan, Nguyen Van tiling, Xay dUng md hinh tinh todn thudt phong cita Sling bdn dUdi nUdcva ddnh gid ket qud bang thit nghiem Tap chi Khoa hoc va Ky thuat (Hgc vien KTQS), so 159 (2-2014) [3] Dao Van Doan, Nguyen Van HUng, Xdy diing mo hinh tinh todn thudt phong ngodi dan bdn dudi nUdc, Tap chi khoa hpc va Ky thuat (Hoc vien KTQS), so thang 8-2014 [4] Ngo Quy Ty, Nguyen Tran Hao, Nguyen ly thiSt ke siing tU dgng, tap 1,2, TrUdng Dai hpc Ky thuat quan sU, 1975 ISSN 0866 - 7056 TAP CHi CO KHi VIET NAM, S6 1+2 nam 2015 www.cokhivietnam.vn