JPH01167956U - - Google Patents
Info
- Publication number
- JPH01167956U JPH01167956U JP6068388U JP6068388U JPH01167956U JP H01167956 U JPH01167956 U JP H01167956U JP 6068388 U JP6068388 U JP 6068388U JP 6068388 U JP6068388 U JP 6068388U JP H01167956 U JPH01167956 U JP H01167956U
- Authority
- JP
- Japan
- Prior art keywords
- fan
- air
- blades
- noise reduction
- reduction device
- 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.)
- Pending
Links
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000001595 contractor effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
第１図はフアンの下流側に絞り部を有し、絞り
部より下流側断面を上流側よりも小さくしたダク
ト内を流れる空気の流速分布図、第２〜３図は広
翼弦翼の形状を示す図、第４図は従来技術におけ
るダクト内の空気の流れを示す断面図、第５図は
同じく従来技術におけるダクト内を流れる空気の
流速分布図である。第６〜７図は従来技術の例で
ある。
１…フアン、２…ダクト、３…縮流効果、４…
一様流、５…剪断流、６…うず、７…絞り部、８
…広翼弦翼、９…従来型翼、５１…艇体、５２…
エンジン、５３…フアン、５４…ダクト、５５…
スカート、５６…操縦席。
Figure 1 is a flow velocity distribution diagram of air flowing through a duct that has a throttle part on the downstream side of the fan, and the cross section downstream of the throttle part is smaller than that on the upstream side. Figures 2 and 3 are the shapes of wide chord blades. FIG. 4 is a sectional view showing the flow of air in the duct in the prior art, and FIG. 5 is a flow velocity distribution diagram of the air flowing in the duct in the prior art. 6-7 are examples of prior art. 1...Fan, 2...Duct, 3...Contraction effect, 4...
Uniform flow, 5... Shear flow, 6... Whirlpool, 7... Throttle part, 8
...Broad chord wing, 9...Conventional wing, 51...Hull, 52...
Engine, 53...fan, 54...duct, 55...
Skirt, 56...cockpit.
補正 昭６３．８．３
実用新案登録請求の範囲を次のように補正する
。Amendment August 3, 1983 The scope of claims for utility model registration is amended as follows.
【実用新案登録請求の範囲】
１ フアンを囲繞して風路を形成するダクトにお
いて、フアン下流側をフアン上流側よりも断面積
を減じたことを特徴とするエヤークツシヨン型乗
物のフアン騒音低減装置。
２ フアンの翼が広翼弦型翼である請求項１記載
のエヤークツシヨン型乗物のフアン騒音低減装置
。
図面の簡単な説明を次のように補正する。
明細書第７頁第１２行の「３…縮流効果、」を
削除する。[Claims for Utility Model Registration] 1. A fan noise reduction device for an air pump type vehicle, characterized in that in a duct surrounding the fan to form an air passage, the cross-sectional area on the downstream side of the fan is smaller than on the upstream side of the fan . 2. The fan noise reduction device for an air-action type vehicle according to claim 1, wherein the fan blades are wide chord type blades. The brief description of the drawing has been amended as follows. Delete "3... Contraction effect" on page 7, line 12 of the specification.
Claims (1)
いて、フアンよりも下流側をフアンよりも上流側
よりも断面積を減じたことを特徴とするエヤーク
ツシヨン型乗物のフアン騒音低減装置。 ２ フアンの翼が広翼弦型翼である請求項１記載
のエヤークツシヨン型乗物のフアン騒音低減装置
。[Scope of Claim for Utility Model Registration] 1. A fan for an air-action type vehicle, characterized in that, in a duct surrounding the fan to form an air passage, the cross-sectional area of the downstream side of the fan is smaller than that of the upstream side of the fan. Noise reduction device. 2. The fan noise reduction device for an air-action type vehicle according to claim 1, wherein the fan blades are wide chord type blades.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6068388U JPH01167956U (en) | 1988-05-10 | 1988-05-10 | |
| US07/613,442 US5096013A (en) | 1988-05-10 | 1990-11-14 | Reduced-noise propulsion system of air-cushion vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6068388U JPH01167956U (en) | 1988-05-10 | 1988-05-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01167956U true JPH01167956U (en) | 1989-11-27 |
Family
ID=31286386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6068388U Pending JPH01167956U (en) | 1988-05-10 | 1988-05-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01167956U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5413281U (en) * | 1977-06-30 | 1979-01-27 |
-
1988
- 1988-05-10 JP JP6068388U patent/JPH01167956U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5413281U (en) * | 1977-06-30 | 1979-01-27 |