JPS6017724Y2 - Outboard motor test propeller - Google Patents
Outboard motor test propellerInfo
- Publication number
- JPS6017724Y2 JPS6017724Y2 JP4171179U JP4171179U JPS6017724Y2 JP S6017724 Y2 JPS6017724 Y2 JP S6017724Y2 JP 4171179 U JP4171179 U JP 4171179U JP 4171179 U JP4171179 U JP 4171179U JP S6017724 Y2 JPS6017724 Y2 JP S6017724Y2
- Authority
- JP
- Japan
- Prior art keywords
- propeller
- outboard motor
- outer ring
- test
- blades
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
- Testing Of Engines (AREA)
Description
【考案の詳細な説明】
本考案は船外機のテスト用プロペラに関するものである
。[Detailed Description of the Invention] The present invention relates to a propeller for testing outboard motors.
一般に、船外機のテスト時においては、その出力馬力の
確認、耐久性テスト等のため第１図に示すように、プロ
ペラシャフトにテスト用プロペラ１が取付けられる。Generally, when testing an outboard motor, a test propeller 1 is attached to a propeller shaft, as shown in FIG. 1, in order to confirm its output horsepower, test its durability, etc.
そして、このテスト用プロペラとしては、第２図に示す
ように、プロペラシャフト２に取付けられるプロペラボ
ス３の外周に内環部４を一体に形成し、内環部４の外側
に外環部５を配し、内環部４と外環部５との間に複数の
羽根６を放射状に一体に設けたものが考えられている。As shown in FIG. 2, this test propeller has an inner ring part 4 integrally formed on the outer periphery of a propeller boss 3 attached to the propeller shaft 2, and an outer ring part 5 on the outside of the inner ring part 4. It has been considered that a plurality of blades 6 are integrally provided radially between the inner ring part 4 and the outer ring part 5.
ところが、このような構造のテスト用プロペラにおいて
は、プロペラボス３の内部を通して排気する方式の船外
機に適用した場合、羽根６の回転に伴って、遠心力で水
が外方向に（図中破線矢印方向）に送り出され、これに
伴って、プロペラボス３の後端部から排出された排気が
図中実線矢印方向に逆流して羽根６に巻込まれ、プロペ
ラ回転が不安定になる問題がある。However, when a test propeller with such a structure is applied to an outboard motor that exhausts air through the inside of the propeller boss 3, the centrifugal force causes water to flow outward (as shown in the figure) as the blades 6 rotate. As a result, the exhaust gas discharged from the rear end of the propeller boss 3 flows backward in the direction of the solid arrow in the figure and gets caught up in the blades 6, resulting in unstable propeller rotation. be.
本考案は上記問題点を解消した船外機のテスト用プロペ
ラを提共するこを目的とするもので、羽根のプロペラボ
ス後端部側の内・外環部間を塞ぐ壁部を形成することに
より、排気が羽根間に巻込まれるのを防止したことを特
徴とするものである。The purpose of this invention is to provide a test propeller for outboard motors that solves the above-mentioned problems.The purpose of the present invention is to provide a propeller for testing outboard motors that solves the above-mentioned problems. This feature prevents exhaust gas from being drawn in between the blades.
以下図示実施例につき本考案を詳細に説明する。The present invention will be described in detail below with reference to the illustrated embodiments.
第３図において７は船外機のプロペラシャフトで、該シ
ャフト７にはゴム環８を介してテスト用プロペラのプロ
ペラボス９が取付けられている。In FIG. 3, 7 is a propeller shaft of an outboard motor, and a propeller boss 9 of a test propeller is attached to the shaft 7 via a rubber ring 8.
船外機からの排気はプロペラボス９内を通って該ボス９
の後端部９Ａから排出される。Exhaust air from the outboard motor passes through the propeller boss 9 and reaches the propeller boss 9.
It is discharged from the rear end 9A.
プロペラボス９の外周に内環部１０が一体に形成され、
該内環部１０の外側に外環部１１が配され、該外環部１
１と内環部１０との間には、第４図に示すように、複数
の羽根１２が放射状に一体に設けられている。An inner ring portion 10 is integrally formed on the outer periphery of the propeller boss 9,
An outer ring portion 11 is disposed outside the inner ring portion 10, and the outer ring portion 1
1 and the inner ring portion 10, a plurality of blades 12 are integrally provided in a radial manner, as shown in FIG.
そして、羽根１２のプロペラボス後端部９Ａ側の内・外
環部１０．１１間を塞ぐ壁部１３が内・外環部１０，１
１及び羽根１２と一体に設けられている。A wall portion 13 closing between the inner and outer ring portions 10 and 11 on the side of the propeller boss rear end portion 9A of the blade 12 is connected to the inner and outer ring portions 10 and 1.
1 and the blade 12.
更に、ここでは、内・外環部１０．１１及び壁部１３の
羽根１２側壁面は湾曲面１４となっている。Further, here, the inner/outer ring portions 10.11 and the wall surfaces of the blade 12 side of the wall portion 13 are curved surfaces 14.
上記構成のテスト用プロペラにおいて、プロペラボス９
の後端部９Ａから排出された排気は、プロペラの回転に
よって生じた水流（図中矢印Ａ）に巻込まれたとしても
、壁部１３に遮ぎられるため、羽根１２間に巻込まれる
ことはない。In the test propeller with the above configuration, propeller boss 9
Even if the exhaust gas discharged from the rear end portion 9A is caught in the water flow (arrow A in the figure) generated by the rotation of the propeller, it is blocked by the wall portion 13, so it will not be drawn in between the blades 12. .
従って、羽根１２は安定した水流（図中矢印Ｂ）の中で
回転することとなり、プロペラの回転は安定する。Therefore, the blades 12 rotate in a stable water flow (arrow B in the figure), and the rotation of the propeller becomes stable.
特に、本実施例においては、湾曲面１４を形成している
ため、安定した水流を得ることができる。In particular, in this embodiment, since the curved surface 14 is formed, a stable water flow can be obtained.
本考案は上記構成をなすものであるから、テスト用プロ
ペラの回転を安定させることができるようになり、船外
機の出力馬力の確認、機関の整備、耐久性テスト等を支
障なく容易に行うことができるようになる。Since the present invention has the above-mentioned configuration, it is possible to stabilize the rotation of the test propeller, and it is possible to easily check the output horsepower of the outboard motor, maintain the engine, and test the durability without any problems. You will be able to do this.
第１図はテスト用プロペラを船外機に取付けた状態を示
す船外機の全体正面図、第２図はテスト用プロペラの一
例の近傍の縦断面図、第３図は本考案の一実施例を示す
テスト用プロペラ近傍の縦断面図、第４図は第２図に示
すテスト用プロペラの左側面図。
７・・・・・・プロペラシャフト、９・・・・・・プロ
ペラボス、１０・・・・・・内環部、１１・・・・・・
外環部、１２・・・・・・羽根、１３・・・・・・壁部
、１４・・・・・・湾曲部。Figure 1 is an overall front view of the outboard motor showing the state in which the test propeller is attached to the outboard motor, Figure 2 is a vertical cross-sectional view of an example of the test propeller, and Figure 3 is an example of the implementation of the present invention. FIG. 4 is a longitudinal sectional view of the vicinity of the test propeller showing an example, and FIG. 4 is a left side view of the test propeller shown in FIG. 7...Propeller shaft, 9...Propeller boss, 10...Inner ring part, 11...
Outer ring part, 12...Blade, 13...Wall part, 14...Curved part.
Claims (2)
ラボスの外周に内環部を形成し、該内環部の外側に外環
部を配し、該外環部と内環部との間に羽根を放射状に設
け、該羽根のプロペラボス後端部側の内・外環部間を塞
ぐ壁部を設けたことを特徴とする船外機のテスト用プロ
ペラ。(1) An inner ring is formed on the outer periphery of the propeller boss attached to the propeller shaft of the outboard motor, an outer ring is arranged outside the inner ring, and the outer ring is disposed between the outer ring and the inner ring. A test propeller for an outboard motor, characterized in that blades are provided radially, and a wall portion is provided to close between the inner and outer ring portions of the blades on the rear end side of the propeller boss.
のテスト用プロペラにおいて、前記内・外環部及び壁部
の羽根側壁面を湾曲面としたもの。(2) Utility Model Registration In the test propeller for an outboard motor according to claim (1), the blade side wall surfaces of the inner and outer ring portions and the wall portion are curved surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4171179U JPS6017724Y2 (en) | 1979-03-30 | 1979-03-30 | Outboard motor test propeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4171179U JPS6017724Y2 (en) | 1979-03-30 | 1979-03-30 | Outboard motor test propeller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55141040U JPS55141040U (en) | 1980-10-08 |
| JPS6017724Y2 true JPS6017724Y2 (en) | 1985-05-30 |
Family
ID=28912815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4171179U Expired JPS6017724Y2 (en) | 1979-03-30 | 1979-03-30 | Outboard motor test propeller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6017724Y2 (en) |
-
1979
- 1979-03-30 JP JP4171179U patent/JPS6017724Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55141040U (en) | 1980-10-08 |
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