JPH064022Y2 - Engine cooling system - Google Patents
Engine cooling systemInfo
- Publication number
- JPH064022Y2 JPH064022Y2 JP13600189U JP13600189U JPH064022Y2 JP H064022 Y2 JPH064022 Y2 JP H064022Y2 JP 13600189 U JP13600189 U JP 13600189U JP 13600189 U JP13600189 U JP 13600189U JP H064022 Y2 JPH064022 Y2 JP H064022Y2
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- main heat
- fan
- cooling air
- engine
- 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 - Lifetime
Links
- 238000001816 cooling Methods 0.000 title claims description 56
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Component Parts Of Construction Machinery (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、建設機械等のエンジン冷却装置に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an engine cooling device for a construction machine or the like.
従来のエンジン冷却装置は、その側断面を第５図に、第
５図のVI−VI矢視断面を第６図に示すようにエンジン12
の前方に主熱交換器３および相互に形状及び寸法の異っ
た副熱交換器４，５を設置し、その中間部でファンプー
リ17を介してエンジン12に取付けられた冷却ファン１
を、同じくエンジン12のクランクシャフト15に取付けら
れたクランクプーリ16およびファンベルト17でエンジン
12の回転力を伝え回転させる。このようにして冷却ファ
ン１が回転することによって冷却風をエンジンカバー14
の開口部よりエンジンカバー１４内へ吸入し、副熱交換
器４，５および主熱交換器３を通過し冷却ファン１を経
てエンジン12後方へ吐出される。A conventional engine cooling device has a side cross section thereof as shown in FIG. 5 and a cross section taken along the line VI-VI of FIG. 5 as shown in FIG.
A main heat exchanger 3 and sub heat exchangers 4 and 5 having different shapes and dimensions from each other are installed in front of the cooling fan 1, and a cooling fan 1 attached to an engine 12 via a fan pulley 17 at an intermediate portion thereof.
With a crank pulley 16 and a fan belt 17 that are also attached to the crankshaft 15 of the engine 12.
It transmits the rotational force of 12 and rotates it. By rotating the cooling fan 1 in this manner, the cooling air is blown by the engine cover 14
The air is sucked into the engine cover 14 through the opening, passes through the sub heat exchangers 4, 5 and the main heat exchanger 3, passes through the cooling fan 1, and is discharged to the rear of the engine 12.
冷却風が副熱交換器４，５および主熱交換器３を通過す
ることによってそれらの内部を流れる高温流体との間で
熱交換が行なわれる。その際の冷却風の速度及び副熱交
換器４，５通過後の温度の分布はたとえば次の(1)，(2)
式で示されるようになる。なお、冷却風の流路や温度の
計測点は第４図に示される。When the cooling air passes through the auxiliary heat exchangers 4 and 5 and the main heat exchanger 3, heat is exchanged with the high temperature fluid flowing therein. The velocity of the cooling air and the temperature distribution after passing through the auxiliary heat exchangers 4 and 5 are as shown in (1) and (2) below.
It becomes as shown by the formula. The cooling air flow path and temperature measurement points are shown in FIG.
なお、ＶＡは副熱交換器４における冷却風の速度、ＶＢ
は副熱交換器５における冷却風の速度、ＴＡは副熱交換
器４を通過直後の冷却風の温度、ＴＢは副熱交換器５を
通過直後の冷却風の温度である。In addition, V A is the velocity of the cooling air in the sub heat exchanger 4, and V B
Is the velocity of the cooling air in the auxiliary heat exchanger 5, T A is the temperature of the cooling air immediately after passing through the auxiliary heat exchanger 4, and T B is the temperature of the cooling air immediately after passing through the auxiliary heat exchanger 5.
ＶＡ＜ＶＢ……………………(1) ＴＡ＞ＴＢ……………………(2) 但し、ＶＡ，ＶＢの単位はm/s ＴＡ，ＴＢの単位は℃。V A <V B ……………… (1) T A > T B ………… (2) However, the unit of V A and V B is m / s T A , T B The unit is ° C.
上記従来のエンジン冷却装置には解決すべき次の問題が
あった。The conventional engine cooling device described above has the following problems to be solved.
即ち、従来の油圧ショベル等建設機械のエンジン冷却装
置は、エンジン12の前方に主熱交換器３を設置し、さら
にその前方に副熱交換器４，５が冷却風の流れに対し並
列に設置されているが、副熱交換器４、副熱交換器５
は、それぞれ形状寸法も違いさらにその内部を流れる流
体の温度も違うので、同じ温度の冷却風が吸入されても
副熱交換器４を通過した空気と副熱交換器５を通過した
空気とでは温度が相違し、それらの間には温度差が生じ
る。この状態で、副熱交換器４，５を通過した冷却風が
主熱交換器３を通過すると主熱交換器３を通過する空気
温度の分布は均一でなくなるので、主熱交換器３の冷却
性能が低下するという問題があった。That is, in a conventional engine cooling device for a construction machine such as a hydraulic excavator, a main heat exchanger 3 is installed in front of the engine 12, and sub heat exchangers 4 and 5 are installed in front of the main heat exchanger 3 in parallel to the flow of cooling air. However, the secondary heat exchanger 4 and the secondary heat exchanger 5
Are different in shape and size, and the temperature of the fluid flowing therein is also different. Therefore, even if the cooling air of the same temperature is taken in, the air passing through the sub heat exchanger 4 and the air passing through the sub heat exchanger 5 are different. The temperatures are different and there is a temperature difference between them. In this state, when the cooling air passing through the sub heat exchangers 4 and 5 passes through the main heat exchanger 3, the temperature distribution of the air passing through the main heat exchanger 3 is not uniform, so that the cooling of the main heat exchanger 3 is performed. There was a problem that performance deteriorated.
本考案は上記課題の解決手段として、強制駆動される冷
却ファンの後方にエンジンを有し前方に主熱交換器を備
えるとともに同主熱交換器の前方に相互に形状及び寸法
の違う副熱交換器を複数備えたエンジン冷却装置におい
て、上記主熱交換器と副熱交換器との間に回転自由に支
持された従動ファンを具備してなることを特徴とするエ
ンジン冷却装置を提供しようとするものである。As a means for solving the above problems, the present invention has an engine behind a forcedly driven cooling fan, a main heat exchanger in front of the engine, and a sub heat exchanger having different shapes and sizes in front of the main heat exchanger. An engine cooling device having a plurality of heat exchangers is provided with a driven fan rotatably supported between the main heat exchanger and the sub heat exchanger. It is a thing.
本考案は上記のように構成されるので次の作用を有す
る。Since the present invention is constructed as described above, it has the following effects.
即ち、主熱交換器と相互に形状及び寸法の違う副熱交換
器との間に設けられた回転自由の従動ファンは、相互に
形状及び寸法が異る副熱交換器を通過することによって
異なる冷却風の風速ＶＡおよびＶＢによって回転させら
れ、その攪拌によって各副熱交換器を通過した冷却風の
温度ＴＡ＞ＴＢを次の式(3)で示される均一な温度ＴＣ
に変え、主熱交換器に送る。That is, the rotation-free driven fan provided between the main heat exchanger and the auxiliary heat exchangers having different shapes and sizes differ from each other by passing through the auxiliary heat exchangers having different shapes and sizes. The temperature T A > T B of the cooling air that has been rotated by the air velocities V A and V B of the cooling air and has passed through each sub heat exchanger due to the stirring is expressed by the uniform temperature T C shown by the following formula (3).
And send it to the main heat exchanger.
但し、ＱＡ：温度ＴＡの冷却風の風量、 ＱＢ：温度ＴＢの冷却風の風量、 ＴＡ，ＴＢ：上記(2)式による。 However, Q A: according to the above (2): the amount of cooling air temperature T A, Q B: the amount of cooling air temperature T B, T A, T B .
本考案の一実施例を第１図及び第２図によって説明す
る。第１図は本実施例に係る建設機械のエンジン冷却装
置の側断面図、第２図は第１図のII矢視図である。な
お、従来例の第５図、第６図と同様の構成部材には同符
号を付し、説明を省略する。An embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a side sectional view of an engine cooling device for a construction machine according to the present embodiment, and FIG. 2 is a view taken in the direction of arrow II in FIG. The same members as those in FIGS. 5 and 6 of the conventional example are designated by the same reference numerals, and the description thereof will be omitted.
両図において、主熱交換器３とその前方（上流）の副熱
交換器４，５との間には軸受11を介して主熱交換器３の
正面とほぼ平行な面内で回転自在な従動ファン２がナッ
ト19によって後述のカウル７から流れ方向に突出した取
付軸10に固定されている。従動ファン２は、強化プラス
チック等、強化軽量な素材で望ましい形状に作られ、回
転ロスを極力低下させるよう構成されている。その他の
構成については従来例とほぼ同様である。In both figures, the main heat exchanger 3 and the front (upstream) auxiliary heat exchangers 4, 5 are rotatable via bearings 11 in a plane substantially parallel to the front surface of the main heat exchanger 3. The driven fan 2 is fixed by a nut 19 to a mounting shaft 10 that projects from a cowl 7 described later in the flow direction. The driven fan 2 is made of a reinforced lightweight material such as reinforced plastic to have a desired shape, and is configured to reduce the rotation loss as much as possible. Other configurations are almost the same as the conventional example.
次に上記構成の作用を説明する。エンジン12が運転され
ると、その回転力は、クランクシャフト15、クランクプ
ーリ16、ファンベルト18、ファンプーリ17を経て冷却フ
ァン１に伝えられて冷却ファン１が回転し、冷却風を第
１図の左から吸込み、エンジン12側へ吐出する。Next, the operation of the above configuration will be described. When the engine 12 is operated, its rotational force is transmitted to the cooling fan 1 via the crankshaft 15, the crank pulley 16, the fan belt 18 and the fan pulley 17, and the cooling fan 1 rotates, so that the cooling air is generated. Intake from the left and discharge to the engine 12 side.
このとき、主熱交換器３と副熱交換器４、５との間で主
熱交換器３前面（図の左方）にボルトで取付けられた取
付板８と一体となっている非駆動の取付軸10には上述の
通り軸受11を介して回転自在な従動ファン２が取付けら
れているので、冷却ファン１で吸込んだ冷却風の速度エ
ネルギーでこの従動ファン２は回転する。従動ファン２
は羽根のねじ角度を冷却ファン１と同等にしているので
冷却ファン１と同方向へ回転する。また、副熱交換器
４，５と主熱交換器３との間は、取付板８と一体化した
カウル７とで周囲と仕切っているので主熱交換器３へ吸
込まれる冷却風は、副熱交換器４，５及び従動ファン２
を通過したものが送られる。その際の冷却風の流れ及び
温度等の状態は次の通りである。At this time, between the main heat exchanger 3 and the auxiliary heat exchangers 4 and 5, a non-driving unit integrated with a mounting plate 8 mounted on the front surface of the main heat exchanger 3 (on the left side in the drawing) by bolts. Since the driven fan 2 which is rotatable via the bearing 11 is mounted on the mounting shaft 10 as described above, the driven fan 2 is rotated by the velocity energy of the cooling air sucked by the cooling fan 1. Driven fan 2
Since the blade has the same screw angle as the cooling fan 1, it rotates in the same direction as the cooling fan 1. In addition, the space between the sub heat exchangers 4 and 5 and the main heat exchanger 3 is separated from the surroundings by the mounting plate 8 and the cowl 7 which is integrated, so that the cooling air sucked into the main heat exchanger 3 is Sub heat exchangers 4, 5 and driven fan 2
What has passed is sent. The states of the flow and temperature of the cooling air at that time are as follows.
主熱交換器３の前方へそれぞれ形状、容量の違った副熱
交換器４，５を設置すると、副熱交換器４，５の厚み寸
法および断面構造の違いによる冷却風吸入抵抗の違い
や、副熱交換器４，５の内部を通過する流体の温度の違
いによって、冷却風の通過後の速度分布や温度分布が上
記(1)，(2)式のように違ってくる。When the auxiliary heat exchangers 4 and 5 having different shapes and capacities are installed in front of the main heat exchanger 3, the difference in the cooling air intake resistance due to the difference in thickness dimension and sectional structure of the auxiliary heat exchangers 4 and 5, Due to the difference in the temperature of the fluid passing through the sub heat exchangers 4 and 5, the velocity distribution and the temperature distribution after the passage of the cooling air differ as shown in the above equations (1) and (2).
ところが本実施例では主熱交換器３とその前方に設置さ
れた形状、容量の違う副熱交換器４，５との中間に通過
冷却風の速度エネルギーで自在に回転しうる従動ファン
２を設置しているため、第３図で示すように従動ファン
２通過後の冷却風は攪拌されて上記(3)式で示すように
平均化された均一な温度分布となって主熱交換器３を通
過し、冷却ファン１でエンジン12後方へ吐出される。However, in this embodiment, the driven fan 2 that can freely rotate by the velocity energy of the passing cooling air is installed between the main heat exchanger 3 and the auxiliary heat exchangers 4 and 5 having different shapes and capacities installed in front of it. Therefore, as shown in FIG. 3, the cooling air after passing through the driven fan 2 is agitated to form an averaged and uniform temperature distribution as shown in the equation (3), and the main heat exchanger 3 is cooled. It passes through and is discharged to the rear of the engine 12 by the cooling fan 1.
従って主熱交換器３を通過する空気の温度は一定とな
り、通過する空気の温度が不均一であった従来例に比
し、冷却性能が向上するという利点がある。Therefore, the temperature of the air passing through the main heat exchanger 3 becomes constant, and there is an advantage that the cooling performance is improved as compared with the conventional example in which the temperature of the passing air is non-uniform.
以上、実施例では相互に異る副熱交換器４，５の２個の
例で示したが、２個に限定されるものではなく、３個以
上であってもよい。また、従動ファンの羽根の数も６枚
に限定されるものではなく、本考案の目的を逸脱しない
範囲において増減は自由である。As described above, in the embodiment, two examples of the auxiliary heat exchangers 4 and 5 different from each other are shown, but the number is not limited to two, and may be three or more. Further, the number of blades of the driven fan is not limited to six, and the number of blades can be freely increased or decreased without departing from the object of the present invention.
本考案は上記のように構成されるので次の効果を有す
る。Since the present invention is configured as described above, it has the following effects.
即ち、相互に形状及び寸法の異る副熱交換器と、主熱交
換器との間に回転自由な従動ファンを設けたことによ
り、各副熱交換器を通過したそれぞれ温度の異る冷却風
が、自から従動ファンを回わし、この結果、冷却風が攪
拌され、均一化された温度の冷却風が主熱交換器を通過
するので、不均一な温度の冷却風が主熱交換器を通過し
た従来例に比し、エンジン冷却性能が向上する。That is, by providing a freely rotating driven fan between the sub heat exchangers having different shapes and dimensions and the main heat exchanger, the cooling air having different temperatures passing through each sub heat exchanger is provided. However, the driven fan is rotated by itself, and as a result, the cooling air is agitated and the cooling air having a uniform temperature passes through the main heat exchanger, so that the cooling air having an uneven temperature passes through the main heat exchanger. The engine cooling performance is improved as compared with the conventional example that has passed.
第１図は本考案の一実施例に係るエンジン冷却装置の側
断面図、第２図は第１図のII矢視図、第３図は上記実施
例における冷却風の流れおよび温度分布等を説明するた
めの側断面図、第４図は従来のエンジン冷却装置におけ
る冷却風の流路や温度の測定点等を説明するための側断
面図、第５図は従来のエンジン冷却装置の側断面図、第
６図は第５図のVI−VI矢視断面図である。 １…冷却ファン、２…従動ファン、 ３…主熱交換器、４…副熱交換器、 ５…副熱交換器、６…カウル、 ７…カウル、８…取付板、 10…取付軸、11…軸受、 12…エンジン、13…架台、 14…エンジンカバー、15…クランクシャフト、 16…クランクプーリ、17…ファンプーリ、 18…ファンベルト、19…ナット。FIG. 1 is a side sectional view of an engine cooling device according to an embodiment of the present invention, FIG. 2 is a view taken in the direction of arrow II in FIG. 1, and FIG. 3 shows the flow and temperature distribution of cooling air in the above embodiment. 4 is a side sectional view for explaining, FIG. 4 is a side sectional view for explaining a cooling air flow path, a temperature measuring point, etc. in the conventional engine cooling device, and FIG. 5 is a side sectional view for the conventional engine cooling device. 6 and 6 are sectional views taken along the line VI-VI in FIG. 1 ... Cooling fan, 2 ... Follower fan, 3 ... Main heat exchanger, 4 ... Sub heat exchanger, 5 ... Sub heat exchanger, 6 ... Cowl, 7 ... Cowl, 8 ... Mounting plate, 10 ... Mounting shaft, 11 … Bearing, 12… Engine, 13… Stand, 14… Engine cover, 15… Crankshaft, 16… Crank pulley, 17… Fan pulley, 18… Fan belt, 19… Nut.
Claims (1)
ンを有し前方に主熱交換器を備えるとともに同主熱交換
器の前方に相互に形状及び寸法の違う副熱交換器を複数
備えたエンジン冷却装置において、上記主熱交換器と副
熱交換器との間に回転自由に支持された従動ファンを具
備してなることを特徴とするエンジン冷却装置。1. A forcedly driven cooling fan has an engine behind it, a main heat exchanger in front of it, and a plurality of auxiliary heat exchangers of different shapes and sizes in front of the main heat exchanger. The engine cooling device comprises a driven fan rotatably supported between the main heat exchanger and the sub heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13600189U JPH064022Y2 (en) | 1989-11-27 | 1989-11-27 | Engine cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13600189U JPH064022Y2 (en) | 1989-11-27 | 1989-11-27 | Engine cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0377026U JPH0377026U (en) | 1991-08-01 |
| JPH064022Y2 true JPH064022Y2 (en) | 1994-02-02 |
Family
ID=31683231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13600189U Expired - Lifetime JPH064022Y2 (en) | 1989-11-27 | 1989-11-27 | Engine cooling system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH064022Y2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3223164B2 (en) * | 1998-05-12 | 2001-10-29 | 新キャタピラー三菱株式会社 | Engine cooling structure |
| JP6382788B2 (en) * | 2015-12-11 | 2018-08-29 | カルソニックカンセイ株式会社 | Cooling system |
| JP6386992B2 (en) * | 2015-12-11 | 2018-09-05 | カルソニックカンセイ株式会社 | Cooling system |
| JP6382787B2 (en) * | 2015-12-11 | 2018-08-29 | カルソニックカンセイ株式会社 | Cooling system |
| JP7416108B2 (en) * | 2022-03-08 | 2024-01-17 | いすゞ自動車株式会社 | engine cooling system |
-
1989
- 1989-11-27 JP JP13600189U patent/JPH064022Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0377026U (en) | 1991-08-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |