JPH0413548B2 - - Google Patents
Info
- Publication number
- JPH0413548B2 JPH0413548B2 JP11557684A JP11557684A JPH0413548B2 JP H0413548 B2 JPH0413548 B2 JP H0413548B2 JP 11557684 A JP11557684 A JP 11557684A JP 11557684 A JP11557684 A JP 11557684A JP H0413548 B2 JPH0413548 B2 JP H0413548B2
- Authority
- JP
- Japan
- Prior art keywords
- crankcase
- resistant
- damping plate
- damping
- vibration
- 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
- 238000013016 damping Methods 0.000 claims description 22
- 229910001208 Crucible steel Inorganic materials 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000002861 polymer material Substances 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000005266 casting Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases
- F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
- F02F7/008—Sound insulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、デイーゼルエンジン特に艦艇向けデ
イーゼルエンジン用低騒音形クランクケースに関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a low-noise crankcase for a diesel engine, particularly a diesel engine for ships.
艦艇用デイーゼルエンジンは耐衝撃性の要求か
らエンジン本体のクランクケースに鋼を使用する
必要があるが、軽量化と鋳造容易化のため鋳物に
肉抜穴を数多く設けて本体重量の軽減と薄肉部の
面積低減を図つて来ている。
Diesel engines for ships require the use of steel for the crankcase of the engine body due to impact resistance requirements, but in order to reduce weight and make casting easier, many hollow holes are provided in the casting to reduce the weight of the main body and thin parts. Efforts have been made to reduce the area of
しかしながら、クランクケースを上記のように
構成している結果クランクケースの剛性が低下
し、エンジン振動に起因する騒音の発音体となる
不具合があつた。
However, as a result of configuring the crankcase as described above, the rigidity of the crankcase is reduced, resulting in a problem that the crankcase becomes a sounding body for noise caused by engine vibration.
本発明は上記従来装置の欠点を解消するためな
されたもので、艦艇の水中放射雑音低減要求に対
応した低騒音形クランクケースを提供するのを目
的としている。 The present invention has been made in order to eliminate the drawbacks of the above-mentioned conventional devices, and an object of the present invention is to provide a low-noise crankcase that meets the requirements for reducing underwater radiation noise of ships.
上記目的を達成するため本発明では鋳鋼クラン
クケースの隔壁の肉抜穴にちようど収まるような
外形に形成されしかも高分子材を挾んだ制振鋼板
製の制振板をつくりその外周に耐熱，耐油，緩衝
ゴムを介して該肉抜穴を嵌め込んだことを特徴と
している。
In order to achieve the above object, in the present invention, a damping plate made of a damping steel plate with a polymer material sandwiched between the damping plates is formed to fit into a hollow hole in a bulkhead of a cast steel crankcase. It is characterized by fitting the hollow hole through heat-resistant, oil-resistant, and buffer rubber.
エンジンより発生する振動がクランクケース本
体内側から外側に伝幡する途中で肉抜穴内に嵌め
込まれた制振板で減衰され、低騒音化が実現でき
又肉抜穴の個数を多くすることによりクランクケ
ース本体の軽量化が図られる。
The vibration generated by the engine is attenuated by the vibration damping plate fitted into the lightening holes as it propagates from the inside to the outside of the crankcase body, reducing noise. The weight of the case body can be reduced.
以下第１〜４図を参照して本発明の一実施例に
ついて説明する。
An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.
第１〜４図は本発明に係るもので第１図はＶ形
クランクケースの横断面図、第２図は第１図のＡ
−Ａ断面図、第３図は制振板、第４図は制振板の
断面図を示す。 Figures 1 to 4 are related to the present invention; Figure 1 is a cross-sectional view of the V-shaped crankcase, and Figure 2 is A of Figure 1.
-A sectional view, FIG. 3 shows a damping plate, and FIG. 4 shows a sectional view of the damping plate.
鋳鋼製Ｖ形クランクケース１の隔壁部に肉抜穴
１ａ，１ｂを各隔壁毎に設け、さらに第４図のよ
うに高分子材６，７を中央部に挾んだ制振鋼板製
のプレス形２枚合せ点溶接制振板２，４を、その
外周に耐熱耐油緩衝ゴム３，５を挾んで当該肉抜
穴１ａ，１ｂに嵌入する。なお肉抜穴１ａ，１ｂ
の内周は鋳造の抜勾配αを付ける。 A press made of vibration-damping steel plate is provided with hollow holes 1a and 1b in each partition wall of the cast steel V-shaped crankcase 1, and furthermore, as shown in FIG. 4, polymer materials 6 and 7 are sandwiched in the center. A two-piece point-welded damping plate 2, 4 is inserted into the lightening holes 1a, 1b with heat-resistant and oil-resistant buffer rubber 3, 5 sandwiched around its outer periphery. Note that the lightening holes 1a and 1b
The draft angle α of casting is attached to the inner periphery.
次に上記実施例の作用について説明する。 Next, the operation of the above embodiment will be explained.
耐衝撃性の大きい鋳鋼を使用し、肉抜穴を多く
設けてクランクケース本体の剛性を低下させ、振
動が起き易くなつた本体の肉抜穴部１ａ，１ｂに
板厚の小さい制振板を嵌合して制振板自身が容易
に振動出来るようにし、減衰の大きな制振材で振
動を全て吸収させて全体としてクランクケース本
体の振動を低く押える作用、及び中空の制振板柔
構造のため肉抜穴の抜勾配付黒皮部に制振板の挿
込みが容易となる作用がある。 Cast steel with high impact resistance is used, and many hollow holes are provided to reduce the rigidity of the crankcase body, and vibration damping plates with small thickness are installed in the hollow holes 1a and 1b of the main body, where vibrations are likely to occur. By fitting together, the vibration damping plate itself can easily vibrate, and the vibration damping material with high damping absorbs all the vibrations, thereby suppressing the vibration of the crankcase body as a whole. Therefore, it has the effect of making it easier to insert the damping plate into the black skin part with the draft angle of the lightening hole.
〔発明の効果〕
前述のとおり本発明の低騒音形クランクケース
は、鋳鋼製クランクケースの隔壁の適所に肉抜穴
を設け、この肉抜穴に高分子材を挾んだ制振鋼板
製の制振板をその外周に耐熱、耐油，緩衝ゴムを
介してはめ込んだので、次のような効果が得られ
る。[Effects of the Invention] As mentioned above, the low-noise crankcase of the present invention has a lightening hole provided at an appropriate location in the bulkhead of the cast steel crankcase, and a damping steel plate with a polymer material sandwiched in the lightening hole. Since the vibration damping plate is fitted around its outer periphery via heat-resistant, oil-resistant, and buffer rubber, the following effects can be obtained.
(1) エンジンの振動がクランクケース本体内側か
ら外側に伝播する途中で制振板で減衰され低騒
音化が図られる。(1) Engine vibration is damped by a damping plate as it propagates from the inside of the crankcase body to the outside, reducing noise.
(2) 肉抜穴の個数が多いので、クランクケース本
体の軽量化が図られる。(2) Since there are a large number of lightening holes, the weight of the crankcase body can be reduced.
(3) ２つ壁が交叉する熱点部が肉抜出来るので鋳
造欠陥が少なくなり、鋳造コストの低減が図ら
れる。(3) The hot spot where the two walls intersect can be thinned out, reducing casting defects and reducing casting costs.
第１乃至第４図は本発明に係るもので、第１図
はＶ形エンジンのクランクケース横断面図、第２
図は第１図のＡ−Ａ断面図、第３図は制振板の正
面図、第４図は制振板の断面図である。
１……クランクケース、１ａ，１ｂ……肉抜
穴、２，４……制振板、３，５……耐熱、耐油、
緩衝ゴム、６，７……高分子材。
1 to 4 are related to the present invention; FIG. 1 is a cross-sectional view of the crankcase of a V-type engine;
The figures are a sectional view taken along the line AA in FIG. 1, FIG. 3 is a front view of the vibration damping plate, and FIG. 4 is a sectional view of the vibration damping plate. 1... Crank case, 1a, 1b... Thickening holes, 2, 4... Damping plate, 3, 5... Heat resistant, oil resistant,
Buffer rubber, 6, 7...polymer material.
Claims (1)
を設け、さらにこの肉抜穴に高分子材を挾んだ制
振鋼板製の制振板をその外周に耐熱耐油緩衝ゴム
を挾んで嵌め込んだことを特徴とする低騒音形ク
ランクケース。1. A lightening hole is created at an appropriate location in the bulkhead of the cast steel crankcase, and a vibration damping plate made of a damping steel plate with a polymer material sandwiched between it and a heat-resistant and oil-resistant buffer rubber is inserted around the outer periphery of the damping plate. A low-noise crankcase that is characterized by
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11557684A JPS60261959A (en) | 1984-06-07 | 1984-06-07 | Low noise crank case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11557684A JPS60261959A (en) | 1984-06-07 | 1984-06-07 | Low noise crank case |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60261959A JPS60261959A (en) | 1985-12-25 |
| JPH0413548B2 true JPH0413548B2 (en) | 1992-03-10 |
Family
ID=14665991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11557684A Granted JPS60261959A (en) | 1984-06-07 | 1984-06-07 | Low noise crank case |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60261959A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2900248B2 (en) * | 1996-12-27 | 1999-06-02 | 本田技研工業株式会社 | Water-cooled internal combustion engine |
-
1984
- 1984-06-07 JP JP11557684A patent/JPS60261959A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60261959A (en) | 1985-12-25 |
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