Tính toán thiết kế nòng súng ngắn bắn dưới nước

Khi tinh toan thi^t k^ sung bSn duoi nuoc thi viec thiet ke nong siing la vSn d8 dupe dat len hang dSu, vi nong la chi ti8t quan trpng nhat quySt dinh den tinh nang, chit lupng va mdi th

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 khi 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

Nghien cim thiet Ice, che tao sung va

dan ban duoi nuoc hien nay dang la mot nhiem

vu moi va cap bach de trang bi cho luc lugfng

dac cong nguoi nhai va cac don vi dac nhiem

ciia Hai Quan Khi tinh toan thi^t k^ sung bSn

duoi nuoc thi viec thiet ke nong siing la vSn d8

dupe dat len hang dSu, vi nong la chi ti8t quan

trpng nhat quySt dinh den tinh nang, chit lupng

va mdi tho cua sung Sau khi nghien cuu mo

hinh chuyen dpng cua dan bjn duoi nuoc [1],

xay dung mo hinh va giai bai toan thuat phong trong [2], thuat phong ngoai [3], da xac dinh dupe mot s6 dac di6m va tham s6 cila nong sung ban duoi nuoc nhu:

- Nong Sling ngan ban duoi nuoc la loai nong tron, co 5,7mm va chiSu dai nong la 260 mm;

- Dinh vi dan trong buong dan bing vai dan, sii dung loai v6 li6u 5,56x45 mm c6 kich thu6c nhu hinh 1

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NGHIEN cufu-TRAOedi

Hinh 1 Kich thu&c vo lieu 5,56x45 mm

Dp nho cua vien dan ra ngoai buong dan

K phai chpn sao cho khi khoang each giiia mat guong kh6a nong vdi mat dinh vi ciia buong dan cd gia tri Idn nhat, mat trong ciia day vd dan khong nh6 ra khoi mat sau cua nong Theo [4] chpn lupfng nho ra khoi buong dan ciia vo

dan K = 3,13 mm va cac c6ng thiic tinh cac

kich thudc Aa, Ab nhu sau;

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

2 TINH TOAN THIET KE LONG NONG

SUNG BAN Dir6l NlTOfC

Tinh toan thiet ke long ndng siing trudc

het phai thiet ke bu6ng dan Kich thudc buong

dan chpn theo kich thudc vo dan nham dam

bao sao cho viec nap dan vao buong dan duac

de dang khi cae sai l^ch kich thudc nam trong

khoang dung sai Viec lap ghep dan vao bu6ng

dan phai dam bao bit kin khi thuoc va dam bao

dp b6n cua thanh vo dan khi ban

Kich thudc dpc true ciia budng dan

dup'c xac dinh theo loai v6 dan va phuang phap

dinh vi dan trong buong dan Do d6 kich thudc

budng dan dugc xac dinh theo kich thudc vo

lieu 5,56x45mm va theo phuang phap dinh

vi dan bang vai dan, nen so do tinh toan kich

thudc bu6ng dan duac thyc hien theo hinh 2

[4]

-.7,715.0,008 cot23''=0,0727

_[c:

/ / / / ^ / / //iL

ggm

Trong do:

+ d^ ^ 7,715 mm - Dudng kinh trung binh cua

vo dan d vai dan;

+ Ap ^ 0,008 mm - Khe hd hudng tam tuong doi giiia vo dan va buong dan;

+ a = 46" - goc con chuyen tiep ciia buong dan

Chpn: A^ = 1 mm ta dupfc cac kich thudc

dai cua buong dan:

Hinh 2 Sa do dnh todn buong dgn

b^-b^-K-Aj,

c^ = c^-K-\

Trong do, cac kich thudc a^, b^, c^ lay theo kich thudc vo lieu:

a^-36,02 mm b^-39,05 mm c^ = 44,20 mm Thay s6 ta nhan dugc ket qua:

d^ = 32,79 mm; b^, = 36,47 mm; c^, = 42,05 mm

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]: ^

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NGHIEN cufu-TRAO DOI

d^,= (1+A^,).d^ 2) Xay dyng dudng cong ap suat khi

thuoc Idn nhat tac dung vao thanh ndng (dudng Tai cac ti^t dien d =9,58 va 9 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 trong 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 3

Hinh 3 Ket cdu long nong sung bdn du&i nuac

3 TINH TOAN THIET KE KICH THlTdC

BEN NGOAI NONG

Hinh 5 Cdc du&ng cong dp sudt vd du&ng cong

site ben

Nhiem vu ciia tinh toan thiet ke kich

thudc ben ngoai ndng la xac dinh chilu day

thanh ndng de dam bao dp ben ciia nong khi

ban Thii tu tinh toan thiet ke kich thudc ben

ngoai nong nhu sau [4]:

1) Chia chieu dai nong thanh cac doan

vdi cac mat cat nhu hinh 4

3) Xay dyng quy luat ap suat ben mong mu6n (hinh 5) bang each nhan tung dp cua dudng ap suat Idn nhat vdi he s6 an toan n theo chieu dai nong (hinh 6)

2 3 4 5

Hinh 4 Mat cdt cua nong vd cdc vi tri quan trpng

Budng dgn Hinh 6 Quy ludt xdc dinh he so an todn theo chiiu

ddi nong

4) Xac dinh dudng kinh ngoai cua ndng Xac dinh dudng kinh ngoai ciia nong d cac tiet dien: Tiet dien day ndng 1 - 1 , tilt dien

ISSN 0866 - 7056

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NGHIEN cufu-TRAO Ddi

2 - 2, 3 - 3, 4 - 4 va tilt dien mieng ndng 5 - 5

(hinh 4) Cac dudng kinh nay dugc xac dinh

theo cong thiic sau [ 4 ] :

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 khi thuoc theo dudng cong siic

ben mong muon

Ket qua tinh toan dudng kinh ngoai

ndng theo bang 1

Bang 1

Tilt dif n

d, (mm)

p' (MPa)

d-2 (mm)

1 - 1

9,68

271 95

14.64095

2 - 2

5,7

307,5

9 261404

3 - 3 5,7

174 15 7,277418

4 - 4 5,7

103 125 6.545161

5 - S 5.7

88 425 6.411177

Nhd vay, ta nhan dugc hinh dang kich

thudc ben ngoai nong nhd hinh 7

Hmh 7 Kich thUdc ben ngodi nong trUdc Ichi hiiu

chinh

Bi dam bao kieu dang va tinh cdng

nghe, khi thiet ke che tao siing ngan 04 ndng ban

ty dpng diidi nUdc, thUc te ta tien hanh ghep 04

ndng thanh 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 8

Hinh 8 Kich thUdc ben ngodi sau khi hieu chinh vd

cum 04 nong

4 KET L U A N

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 trong 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:

[ij Dao Van Doan Ha Huy Nguyen, Nguyen Van HUng, Mai

Quoc Chien, Nguyin Sy Hoa Mo hinh tinit todn sU chuyen dgng

vien KTQS) so 145 (12-2011)

[2] Dao Van Doan, Nguyen Van tiling, Xay dUng md hinh tinh todn thudt phong trong 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

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