JPH0782766A - Electric generator and fan drive of construction machine - Google Patents

Electric generator and fan drive of construction machine

Info

Publication number
JPH0782766A
JPH0782766A JP5248502A JP24850293A JPH0782766A JP H0782766 A JPH0782766 A JP H0782766A JP 5248502 A JP5248502 A JP 5248502A JP 24850293 A JP24850293 A JP 24850293A JP H0782766 A JPH0782766 A JP H0782766A
Authority
JP
Japan
Prior art keywords
hydraulic
generator
hydraulic pump
cooling fan
fan
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
Application number
JP5248502A
Other languages
Japanese (ja)
Inventor
Takashi Yagyu
隆 柳生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP5248502A priority Critical patent/JPH0782766A/en
Publication of JPH0782766A publication Critical patent/JPH0782766A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00Controlling of coolant flow
    • F01P7/02Controlling of coolant flow the coolant being cooling-air
    • F01P7/04Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
    • F01P7/044Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using hydraulic drives

Landscapes

  • Control Of Fluid Gearings (AREA)
  • Operation Control Of Excavators (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE:To drive an electric generator and a cooling fan in a small and simple hydraulic circuit constitution by use of one unit of hydraulic pump. CONSTITUTION:A changeover valve 15 is set between a hydraulic pump 14 and hydraulic motors 12, 13 to actuate an electric generator 10 and a cooling fan 11 in order to change an interchange position connecting the hydraulic pump only to the hydraulic motor for the cooling fan and the interchange position connecting the hydraulic pump to the hydraulic motors for the electric generator and the cooling fan to each other. When working in day time, the changeover valve 15 is retained at the interchange position and the whole oil from the hydraulic pump 14 is supplied to the hydraulic motor 13 to rotate the cooling fan 11 and efficiently supply plenty of cooling air. When working in night time, the changeover valve 15 is switched over to the interchange position to connect both hydraulic motors 12, 13 to the hydraulic pump 14 and drive them simultaneously to actuate the electric generator 10 and the cooling fan 11.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、照明装置を備えた油圧
ショベル等の建設機械において、照明装置用の発電機及
びラジエータやオイルクーラの冷却ファンを作動させる
建設機械の発電機・ファン作動装置に関するものであ
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction machine such as a hydraulic excavator equipped with a lighting device, and a generator / fan operating device for the construction machine for operating a generator for the lighting device and a cooling fan for a radiator and an oil cooler. It is about.

【0002】[0002]

【従来の技術】油圧ショベル等の建設機械のうち、鉱山
等のように、騒音が発生しても問題のない場所等で掘削
その他の作業を行う場合には、昼間だけでなく夜間も作
業が行われる。このために、建設機械には照明装置が設
けられ、夜間作業を行う時には、照明ランプを点灯し
て、作業の安全を図るようにしている。照明するために
発電機が設けられるが、この発電機の駆動源としては、
一般に油圧ポンプが用いられる。
2. Description of the Related Art Among construction machines such as hydraulic excavators, when excavation or other work is to be performed in a place where there is no problem even if noise is generated, such as in a mine, the work is performed not only in the daytime but also at night. Done. For this reason, the construction machine is provided with an illumination device, and when performing night work, the illumination lamp is turned on to ensure the safety of the work. A generator is provided to illuminate, but as the drive source of this generator,
Generally, a hydraulic pump is used.

【0003】[0003]

【発明が解決しようとする課題】ところで、照明を必要
とするのは夜間のみであり、昼間は照明装置を構成する
発電機は停止させるのが一般的である。このように、夜
間のみに必要な発電機を駆動するために、専用の油圧ポ
ンプを設けるのは、必ずしも得策ではない。そこで、本
発明者は、発電機用の油圧ポンプを効率的に活用するた
めに、鋭意研究を行った結果、ラジエータやオイルクー
ラ等の冷却ファンに着目した。
By the way, lighting is required only at night, and the generator constituting the lighting device is generally stopped during the daytime. Thus, it is not always a good idea to provide a dedicated hydraulic pump in order to drive the generator required only at night. Therefore, as a result of earnest research in order to efficiently utilize the hydraulic pump for the generator, the present inventor has focused on a cooling fan such as a radiator or an oil cooler.

【0004】一般に、昼間は夜間より温度が高いことか
ら、ラジエータ,オイルクーラ等の冷却ファンは昼間は
回転数を多くして、冷却風量を多くする必要があるが、
温度が低下する夜間では冷却風量をあまり多くする必要
はなく、ファンの負荷も小さい。そこで、照明装置の発
電機用の油圧ポンプを昼間は冷却用ファンの作動用とし
てバックアップさせるようにすれば、この油圧ポンプを
稼動効率を上げられることになる。
Generally, since the temperature is higher during the daytime than at night, it is necessary to increase the number of rotations of the cooling fan such as the radiator and the oil cooler during the daytime to increase the cooling air volume.
At night when the temperature drops, it is not necessary to increase the cooling air volume so much and the load on the fan is small. Therefore, if the hydraulic pump for the generator of the lighting device is backed up for the operation of the cooling fan during the daytime, the operating efficiency of this hydraulic pump can be increased.

【0005】即ち、図2に示したように、発電機1の作
動用の油圧モータ2を駆動するための油圧ポンプ3が用
いられ、また冷却ファン4の作動用の油圧モータ5を駆
動するための油圧ポンプ6が用いられるが、発電機1用
の油圧ポンプ3には切換弁7が接続される。そして、こ
の切換弁7は、油圧ポンプ3から供給される圧油は、油
圧モータ2に供給できる状態(切換位置イ)と、油圧モ
ータ5に供給できる状態(切換位置ロ)とに切り換える
ことができるように構成されている。
That is, as shown in FIG. 2, a hydraulic pump 3 for driving the hydraulic motor 2 for operating the generator 1 is used, and for driving the hydraulic motor 5 for operating the cooling fan 4. The hydraulic pump 6 is used, but the switching valve 7 is connected to the hydraulic pump 3 for the generator 1. The switching valve 7 can switch between a state in which the pressure oil supplied from the hydraulic pump 3 can be supplied to the hydraulic motor 2 (switching position B) and a state in which the hydraulic oil can be supplied to the hydraulic motor 5 (switching position B). It is configured to be able to.

【0006】夜間のように、周囲温度が低い条件下であ
って、照明を行う必要のある状況下で建設機械を作動さ
せる際には、切換弁7を切換位置イに保持することによ
って、冷却用ファン4は油圧ポンプ6から供給される圧
油により作動する油圧モータ5で駆動し、また照明用の
発電機1を作動させるために、油圧ポンプ3から油圧モ
ータ2に圧油を供給する。一方、昼間は、発電機1は作
動させる必要はないが、冷却ファン4を高速回転させ
て、冷却風量をできるだけ多くしなければならない。そ
こで、切換弁7を切換位置ロに切り換えることによっ
て、油圧モータ5に対しては、油圧ポンプ6だけでな
く、油圧ポンプ3からの圧油を合流させて、流量を増大
させることによって、冷却ファン4に対する油圧モータ
5の駆動トルクを大きくできることになる。
When operating the construction machine under a condition where the ambient temperature is low, such as at night, and lighting is required, the switching valve 7 is kept in the switching position a to cool the construction machine. The fan 4 is driven by a hydraulic motor 5 that is operated by the hydraulic oil supplied from the hydraulic pump 6, and supplies hydraulic oil from the hydraulic pump 3 to the hydraulic motor 2 in order to operate the generator 1 for lighting. On the other hand, during the daytime, it is not necessary to operate the generator 1, but the cooling fan 4 must be rotated at high speed to increase the cooling air volume as much as possible. Therefore, by switching the switching valve 7 to the switching position (b), not only the hydraulic pump 6 but also the hydraulic oil from the hydraulic pump 3 is joined to the hydraulic motor 5 to increase the flow rate. The driving torque of the hydraulic motor 5 with respect to 4 can be increased.

【0007】以上のように構成すれば、冷却ファン4を
作動する油圧ポンプ6を、夜間において必要なトルクが
出力できる低流量の小型のものを用い、大きなトルクが
必要な昼間は、作動させる必要のない発電機1用の油圧
ポンプ3で支援させることにより、発電機用及び冷却フ
ァン用として設けられる2台の油圧ポンプをそれぞれ独
立したものを用いるよりも、油圧ポンプの低容量化,小
型化にとって有利であるものの、前述の構成では油圧ポ
ンプが2台必要であることから、油圧回路全体の小型
化,簡素化等を図るという点でなお改善の余地がある。
According to the above-mentioned structure, the hydraulic pump 6 for operating the cooling fan 4 is a small one having a low flow rate and capable of outputting the required torque at night, and must be operated during the daytime when a large torque is required. With the help of the hydraulic pump 3 for the generator 1 which does not have a hydraulic pump, it is possible to reduce the capacity and size of the hydraulic pump rather than to use two independent hydraulic pumps for the generator and the cooling fan, respectively. However, there is still room for improvement in terms of downsizing and simplification of the entire hydraulic circuit because two hydraulic pumps are required in the above configuration.

【0008】本発明は以上のような背景に基づいてなさ
れたものであって、その目的とするところは、1台の油
圧ポンプを用い、小型で簡単な油圧回路構成で、発電機
及び冷却ファンを作動できるようにすることにある。
The present invention has been made based on the above background, and an object thereof is to use a single hydraulic pump, a compact and simple hydraulic circuit configuration, and a generator and a cooling fan. Is to be able to operate.

【0009】[0009]

【課題を解決するための手段】前述した目的を達成する
ために、本発明は、油圧ポンプと発電機作動用の油圧モ
ータ及びファン作動用の油圧モータとを備え、この油圧
ポンプと両油圧モータとの間に、油圧ポンプを、ファン
作動用の油圧モータに接続する状態と、このファン作動
用の油圧モータ及び発電機作動用の油圧モータとに接続
され、両油圧モータに対して所定の比率で圧油を供給す
る状態との間に切り換える切換弁を介装する構成とした
ことをその特徴とするものである。
In order to achieve the above-mentioned object, the present invention comprises a hydraulic pump, a hydraulic motor for operating a generator and a hydraulic motor for operating a fan, and the hydraulic pump and both hydraulic motors. Between the hydraulic pump for operating the fan and the hydraulic motor for operating the fan and the hydraulic motor for operating the generator, and a predetermined ratio for both hydraulic motors. The configuration is characterized in that a switching valve for switching between the state of supplying pressure oil and the state of supplying pressure oil is interposed.

【0010】[0010]

【作用】建設機械が作動している間は冷却ファンは常に
作動させなければならない。ただし、温度差がある昼間
と夜間とでは、冷却ファンの回転数を変えることができ
る。即ち、昼間では冷却ファンを高速回転させ、夜間で
はファンを低速回転させる。一方、照明用の発電機は夜
間のみ作動させれば良い。そこで、1つの油圧ポンプを
用い、この油圧ポンプを切換弁を介してファン作動用の
油圧モータと発電機作動用の油圧モータとを作動させ
る。昼間は発電機は使用しないから、油圧ポンプをファ
ン作動用の油圧モータのみと接続する。これによって、
油圧ポンプの全流量がファン作動用の油圧モータに供給
され、冷却ファンを高速回転させて、ラジエータやオイ
ルクーラを効率的に冷却できる。
Function The cooling fan must be operated at all times while the construction machine is operating. However, the rotation speed of the cooling fan can be changed between daytime and nighttime when there is a temperature difference. That is, the cooling fan is rotated at high speed in the daytime, and the fan is rotated at low speed at night. On the other hand, the generator for lighting should be operated only at night. Therefore, one hydraulic pump is used, and this hydraulic pump operates the hydraulic motor for operating the fan and the hydraulic motor for operating the generator through the switching valve. Since the generator is not used during the daytime, connect the hydraulic pump only to the hydraulic motor for fan operation. by this,
The entire flow rate of the hydraulic pump is supplied to the hydraulic motor for fan operation, the cooling fan is rotated at high speed, and the radiator and the oil cooler can be efficiently cooled.

【0011】一方、夜間作業を行う際には、作業が行わ
れる以上、冷却ファンを作動させる必要があるが、これ
と共に発電機も作動しなければならない。ただし、夜間
は温度が低いから、冷却ファンの回転数はあまり多くす
る必要はない。そこで、切換弁をファン作動用の油圧モ
ータ及び発電機作動用の油圧モータとに接続される状態
に切り換える。そして、これら両油圧モータに対して所
定の比率で圧油が供給される。ここで、圧油の供給比率
は、冷却ファン及び発電機の作動条件に応じて最適とな
るように設定すれば良い。
On the other hand, when performing night work, it is necessary to operate the cooling fan as long as the work is performed, but the generator must also be operated together with it. However, since the temperature is low at night, it is not necessary to increase the rotation speed of the cooling fan so much. Therefore, the switching valve is switched to a state in which it is connected to the hydraulic motor for operating the fan and the hydraulic motor for operating the generator. Then, pressure oil is supplied to both of these hydraulic motors at a predetermined ratio. Here, the pressure oil supply ratio may be set to be optimum according to the operating conditions of the cooling fan and the generator.

【0012】さらに、油圧ポンプを可変容量ポンプを用
い、切換弁における流路の絞り開口面積を変化させる構
成とすれば、状況に応じて最適な流量で、エネルギのロ
スがないように各油圧モータの駆動制御を行うことがで
きる。
Further, if the hydraulic pump is a variable displacement pump and the throttle opening area of the flow passage in the switching valve is changed, each hydraulic motor has an optimum flow rate according to the situation and no energy loss. Drive control can be performed.

【0013】[0013]

【実施例】以下、図1に基づいて本発明の実施例につい
て説明する。図1において、10は照明装置の発電機、
11はラジエータ、オイルクーラの冷却ファンをそれぞ
れ示すものであって、これら発電機10及び冷却ファン
11はそれぞれ油圧モータ12,13により作動するよ
うになっている。油圧モータ12,13を駆動するため
に、可変容量型の油圧ポンプ14が用いられ、切換弁1
5によって油圧ポンプ14の圧油の供給方向が切り換え
られるようになっている。
Embodiments of the present invention will be described below with reference to FIG. In FIG. 1, 10 is a generator of a lighting device,
Reference numeral 11 denotes a radiator and an oil cooler cooling fan, respectively. The generator 10 and the cooling fan 11 are operated by hydraulic motors 12 and 13, respectively. A variable displacement hydraulic pump 14 is used to drive the hydraulic motors 12 and 13, and the switching valve 1
5, the supply direction of the pressure oil of the hydraulic pump 14 can be switched.

【0014】切換弁15は、電磁切換弁からなるもので
あって、運転席に設けた照明ランプを点灯するためのス
イッチ,ボタン等からなる操作手段16を操作すること
によって、2位置に切り換わるものである。切換位置イ
においては、油圧ポンプ14は冷却ファン用の油圧モー
タ13のみと接続される。また、切換位置ロに切り換え
ると、油圧ポンプ14は発電機用の油圧モータ12及び
冷却ファン用の油圧モータ13と接続される。そして、
切換位置ロにおいては、油圧モータ12,13への流路
には絞り17,18が設けられており、これら絞り1
7,18の開口面積により油圧モータ12,13への供
給流量の比率が決定される。
The switching valve 15 is composed of an electromagnetic switching valve, and is switched to two positions by operating an operating means 16 composed of a switch, a button and the like for lighting an illumination lamp provided in a driver's seat. It is a thing. In the switching position B, the hydraulic pump 14 is connected only to the hydraulic motor 13 for the cooling fan. Further, when switched to the switching position B, the hydraulic pump 14 is connected to the hydraulic motor 12 for the generator and the hydraulic motor 13 for the cooling fan. And
At the switching position B, throttles 17 and 18 are provided in the flow paths to the hydraulic motors 12 and 13, respectively.
The opening areas of 7, 18 determine the ratio of the flow rates supplied to the hydraulic motors 12, 13.

【0015】本発明は以上のように構成されるものであ
って、建設機械を作動させると、ラジエータ,オイルク
ーラの冷却ファン11を回転させて、冷却風を送る必要
がある。また、夜間作業を行う際には、照明装置用の発
電機10を作動させる。
The present invention is constructed as described above, and when the construction machine is operated, it is necessary to rotate the cooling fan 11 of the radiator and the oil cooler to send the cooling air. Further, when performing night work, the generator 10 for the lighting device is operated.

【0016】建設機械の作業が昼間行われる時には、発
電機10は作動させる必要はない。そこで、操作手段1
6によって、照明ランプを消灯状態となし、切換弁15
を切換位置イに保持する。これによって、油圧ポンプ1
4は冷却ファン用の油圧モータ13のみに圧油が供給さ
れて、この油圧モータ13が駆動されて、冷却ファン1
1が回転する。而して、油圧ポンプ14からの全流量は
油圧モータ13に供給されるから、冷却ファン11を高
速回転させることができ、多量の冷却風を効率的に供給
できるようになる。
It is not necessary to operate the generator 10 when construction machinery work is performed during the daytime. Therefore, the operating means 1
6, the illumination lamp is turned off, and the switching valve 15
Is held at the switching position a. As a result, the hydraulic pump 1
4, the pressure oil is supplied only to the hydraulic motor 13 for the cooling fan, the hydraulic motor 13 is driven, and the cooling fan 1
1 rotates. Since the entire flow rate from the hydraulic pump 14 is supplied to the hydraulic motor 13, the cooling fan 11 can be rotated at high speed, and a large amount of cooling air can be efficiently supplied.

【0017】一方、夜間作業を行うに当っては、照明を
行うために、発電機10を作動させなければならず、ま
た建設機械が作動をさせている以上、冷却ファン11も
作動させなければならない。ただし、周囲温度が昼間よ
り低いために、冷却ファン11による冷却風の風量はあ
まり多くなくても良い。そこで、操作手段16を操作し
て、切換弁15を切換位置ロに切り換える。これによっ
て、油圧モータ12,13の双方が油圧ポンプ14と接
続されて、同時に駆動される。而して、油圧ポンプ14
からの圧油は、切換弁15の絞り17,18の開口面積
に比例した流量で油圧モータ12,13に分配されて、
それぞれ供給流量に応じたトルクが出力されて、発電機
10及び冷却ファン11が作動する。従って、絞り1
7,18の開口面積の比率を調整することによって、油
圧モータ12,13の各々に必要なトルクが出力される
ことになる。
On the other hand, when performing night work, the generator 10 must be operated in order to perform lighting, and since the construction machine is operating, the cooling fan 11 must also be operated. I won't. However, since the ambient temperature is lower than that in the daytime, the amount of cooling air blown by the cooling fan 11 may not be so large. Then, the operating means 16 is operated to switch the switching valve 15 to the switching position B. As a result, both the hydraulic motors 12 and 13 are connected to the hydraulic pump 14 and driven simultaneously. Thus, the hydraulic pump 14
Pressure oil is distributed to the hydraulic motors 12, 13 at a flow rate proportional to the opening areas of the throttles 17, 18 of the switching valve 15,
Torque corresponding to the supply flow rate is output, and the generator 10 and the cooling fan 11 operate. Therefore, aperture 1
By adjusting the ratio of the opening areas of 7 and 18, the required torque is output to each of the hydraulic motors 12 and 13.

【0018】ここで、油圧ポンプ14は容量可変ポンプ
からなるものであるから、周囲の温度が変化した時に
は、この油圧ポンプ14の容量をそれに応じて変化させ
れば良い。また、冷却ファン11による冷却風の必要な
送風量は、周囲の温度に応じて異なってくるが、照明に
必要なエネルギは温度とは無関係である。従って、絞り
17,18を可変絞りとなし、この絞り開口面積の比率
を変化させることができるように構成しておけば、周囲
の温度条件等に応じて油圧モータ12,13に供給流量
の調整を行うことができる。
Since the hydraulic pump 14 is composed of a variable capacity pump, when the ambient temperature changes, the capacity of the hydraulic pump 14 may be changed accordingly. Further, the required amount of cooling air to be blown by the cooling fan 11 varies depending on the ambient temperature, but the energy required for illumination is independent of the temperature. Therefore, if the diaphragms 17 and 18 are variable diaphragms and the ratio of the diaphragm opening areas can be changed, the supply flow rate of the hydraulic motors 12 and 13 can be adjusted according to the ambient temperature conditions. It can be performed.

【0019】[0019]

【発明の効果】本発明は、以上のように構成したので、
1つの油圧ポンプと切換弁とを用いて、照明が必要でな
い時には、この油圧ポンプから供給される圧油を冷却フ
ァンを作動させるための油圧モータに全流量を供給し、
夜間のように照明が必要な時には、冷却ファン用の油圧
モータと発電機用の油圧モータとに分配して圧油を供給
することができるようになり、発電機とファンとを作動
させる油圧回路を著しく簡単化,小型化でき、またファ
ンの回転数を昼間と夜間というように、周囲温度に応じ
て変化させることができて省エネルギ的な運転が可能と
なる等の諸効果を奏する。
Since the present invention is constructed as described above,
When no lighting is required, one hydraulic pump and a switching valve are used to supply the pressure oil supplied from this hydraulic pump to the hydraulic motor for operating the cooling fan at a full flow rate.
When lighting is required, such as at night, it becomes possible to distribute pressure oil to the hydraulic motor for the cooling fan and the hydraulic motor for the generator, and a hydraulic circuit that operates the generator and the fan. Can be remarkably simplified and downsized, and the number of rotations of the fan can be changed according to the ambient temperature such as daytime and nighttime, and energy-saving operation can be achieved.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の発電機・ファン作動用の油圧回路の構
成説明図である。
FIG. 1 is a structural explanatory view of a hydraulic circuit for operating a generator / fan according to the present invention.

【図2】本発明の背景技術に基づく発電機・ファン作動
用の油圧回路の構成説明図である。
FIG. 2 is a configuration explanatory view of a hydraulic circuit for operating a generator / fan based on the background art of the present invention.

【符号の説明】[Explanation of symbols]

10 発電機 11 冷却ファン 12 発電機用油圧モータ 13 冷却ファン用油圧モータ 14 油圧ポンプ 15 切換弁 17,18 絞り 10 Generator 11 Cooling Fan 12 Hydraulic Motor for Generator 13 Hydraulic Motor for Cooling Fan 14 Hydraulic Pump 15 Switching Valve 17, 18 Throttle

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 夜間照明を行うための発電機と、ラジエ
ータまたはオイルクーラ冷却用のファンを備えた建設機
械において、油圧ポンプと発電機作動用の油圧モータ及
びファン作動用の油圧モータとを備え、この油圧ポンプ
と両油圧モータとの間に、油圧ポンプを、ファン作動用
の油圧モータに接続する状態と、このファン作動用の油
圧モータ及び発電機作動用の油圧モータとに接続され、
両油圧モータに対して所定の比率で圧油を供給する状態
との間に切り換える切換弁を介装する構成としたことを
特徴とする建設機械の発電機・ファン作動装置。
1. A construction machine equipped with a generator for performing night illumination and a fan for cooling a radiator or an oil cooler, comprising a hydraulic pump, a hydraulic motor for operating the generator, and a hydraulic motor for operating the fan. , Between the hydraulic pump and both hydraulic motors, the hydraulic pump is connected to a fan operating hydraulic motor, and the fan operating hydraulic motor and the generator operating hydraulic motor are connected,
A generator / fan operating device for a construction machine, wherein a switching valve that switches between a state in which pressure oil is supplied to both hydraulic motors at a predetermined ratio is interposed.
【請求項2】 前記油圧ポンプは容量可変型のものであ
ることを特徴とする請求項1記載の建設機械の発電機・
ファン作動装置。
2. The generator for a construction machine according to claim 1, wherein the hydraulic pump is of a variable capacity type.
Fan actuation device.
【請求項3】 前記切換弁は、前記油圧ポンプからファ
ン駆動用の油圧モータ及び発電機作動用の油圧モータへ
の圧油供給量比率を変化させることができるように構成
したことを特徴とする請求項1記載の建設機械の発電機
・ファン作動装置。
3. The switching valve is configured to be capable of changing a pressure oil supply amount ratio from the hydraulic pump to a hydraulic motor for driving a fan and a hydraulic motor for operating a generator. The generator / fan operating device for a construction machine according to claim 1.
JP5248502A 1993-09-10 1993-09-10 Electric generator and fan drive of construction machine Pending JPH0782766A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5248502A JPH0782766A (en) 1993-09-10 1993-09-10 Electric generator and fan drive of construction machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5248502A JPH0782766A (en) 1993-09-10 1993-09-10 Electric generator and fan drive of construction machine

Publications (1)

Publication Number Publication Date
JPH0782766A true JPH0782766A (en) 1995-03-28

Family

ID=17179134

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5248502A Pending JPH0782766A (en) 1993-09-10 1993-09-10 Electric generator and fan drive of construction machine

Country Status (1)

Country Link
JP (1) JPH0782766A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007046761A (en) * 2005-08-12 2007-02-22 Shin Caterpillar Mitsubishi Ltd Hydraulic circuit and control method of hydraulic circuit
JP2010169112A (en) * 2009-01-20 2010-08-05 Caterpillar Japan Ltd Cooling fan speed control device for construction machine
CN112253518A (en) * 2020-10-15 2021-01-22 国电泉州热电有限公司 Fan moving blade control method and device
CN112610569A (en) * 2020-12-07 2021-04-06 北京天地玛珂电液控制***有限公司 Power supply system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007046761A (en) * 2005-08-12 2007-02-22 Shin Caterpillar Mitsubishi Ltd Hydraulic circuit and control method of hydraulic circuit
JP2010169112A (en) * 2009-01-20 2010-08-05 Caterpillar Japan Ltd Cooling fan speed control device for construction machine
CN112253518A (en) * 2020-10-15 2021-01-22 国电泉州热电有限公司 Fan moving blade control method and device
CN112253518B (en) * 2020-10-15 2022-01-07 国能(泉州)热电有限公司 Fan moving blade control method and device
CN112610569A (en) * 2020-12-07 2021-04-06 北京天地玛珂电液控制***有限公司 Power supply system
CN112610569B (en) * 2020-12-07 2023-09-05 北京天玛智控科技股份有限公司 power supply system

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