一種具有以調整螺距之可更換葉片之螺槳Boat Propeller with Adjustable blades for adjusting the pitch thereof

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

11/160414

專利證號

US 7357686 B2

專利獲證名稱

一種具有以調整螺距之可更換葉片之螺槳Boat Propeller with Adjustable blades for adjusting the pitch thereof

專利所屬機關 (申請機關)

國立臺灣大學

獲證日期

2008/04/15

技術說明

複合材料組合可變螺距螺槳，進行設計、製造、測試、分析及改良 等工作。以二個小型船舶使用的舷外機螺槳為分析對象，在可組合螺葉及可改變螺距的條 件下，進行 CAD 設計並轉換成 CNC 切削資料，製作射出成形模具，並完成複合材料組合 可變螺距螺槳原型，使用的軟體包括 I-Deas、Ansys 和 PSF2。採用之基材材料為 Nylon、 PPS 及 GV-5H，為配合射出成型，加強材採用 2mm 短纖玻璃纖維，其中 Nylon 及 PPS 應 用在螺槳一上，GV-5H 則應用在螺槳二上。依螺葉單點受力測試結果顯示，Nylon 螺槳有 變形太大缺點，PPS 螺槳雖然剛性較高，但極限應變太小，容易發生脆性破壞，GV-5H 的 強度遠高於 Nylon 及 PPS，是三者中較適合應用在複合材料組合可變螺距螺槳者。此外， 在分析方面，分別採用 PSF2 與 ANSYS 於螺槳流力負荷及結構計算，並探討加寬螺葉與螺 轂連接長度、增加螺葉厚度及採用較高強度材料來改進複合材料螺槳強度。 A boat propeller comprises a hub formed of a first cylindrical member and a second cylindrical member detachably joined together. The second cylindrical member comprises a plurality of insertion cavities formed in the second cylindrical member, an end of each of the insertion cavities having a plurality of receptacle members. The boat propeller also comprises a plurality of blades equal in number to the number of insertion cavities. Each blade comprises a blade piece portion and an adjustment member, a tip of the adjustment member comprising a positioning member such that the positioning member makes contact with at least one of the receptacle members when the adjustment member is inserted into the corresponding insertion cavity. The positioning member of the adjustment member is selectively matched with one or more of the receptacle members for adjusting a pitch of the blades.

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