JPH0634703U - Bubble removal device in hydraulic circuit of construction machine - Google Patents
Bubble removal device in hydraulic circuit of construction machineInfo
- Publication number
- JPH0634703U JPH0634703U JP7695192U JP7695192U JPH0634703U JP H0634703 U JPH0634703 U JP H0634703U JP 7695192 U JP7695192 U JP 7695192U JP 7695192 U JP7695192 U JP 7695192U JP H0634703 U JPH0634703 U JP H0634703U
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- JP
- Japan
- Prior art keywords
- air
- circuit
- oil
- hydraulic
- tank
- 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.)
- Granted
Links
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- Component Parts Of Construction Machinery (AREA)
- Details Of Reciprocating Pumps (AREA)
- Degasification And Air Bubble Elimination (AREA)
Abstract
(57)【要約】
【目的】 機械の運転を止める事なく、しかも人手によ
るエア抜き作業を行なわなくとも運転中にエアを自動的
に除去できるようにしたもの。
【構成】 作動油タンク１から油圧ポンプ２に至る吸い
込み回路３途中にエア抜きフィルタ４を設け、回路３内
のオイルからエアを外部へ放出させるもの。
【効果】 回路中のエアを直接回路外へ、機械を運転し
ながら除去できるようになり、従来必要であったエア抜
き作業が不要で、油圧機器のキャビテ−ションによる破
損防止が図られ、油圧機器の寿命が大幅に向上できる。
(57) [Summary] [Purpose] Air that can be automatically removed during operation without stopping the operation of the machine and without performing manual air bleeding work. [Structure] An air bleed filter 4 is provided in the middle of a suction circuit 3 extending from a hydraulic oil tank 1 to a hydraulic pump 2 to discharge air from the oil in the circuit 3 to the outside. [Effect] The air in the circuit can be removed directly to the outside of the circuit while the machine is running, eliminating the air bleeding work that was necessary in the past, and preventing damage due to cavitation of hydraulic equipment. The life of the equipment can be greatly improved.
Description
【０００１】[0001]
本考案は建設機械に使用される油圧回路に係り、特に油圧回路中の気泡除去装 置に関する。 The present invention relates to a hydraulic circuit used in a construction machine, and more particularly to a device for removing bubbles in the hydraulic circuit.
【０００２】[0002]
従来から油圧機器と配管との接続等の組立直後や整備直後は、回路中に多量の エアによる気泡が混入しているので、運転初期に回路中の気泡の量が基準値以下 になるようにエア抜きすることが行われている。 Conventionally, a large amount of air bubbles are mixed in the circuit immediately after assembly or maintenance such as connection between hydraulic equipment and piping, so that the amount of bubbles in the circuit should be below the standard value at the beginning of operation. Bleeding is performed.
【０００３】[0003]
【考案が解決しようとする課題】 このようなエア抜きを怠ると油圧ポンプ や油圧シリンダの破損につながることになるので、従来多大の工数を掛けて行な い、しかもエア抜き中は機械そのものの運転を一時停止させなければならなかっ た。[Problems to be Solved by the Invention] If such air bleeding is neglected, the hydraulic pump and the hydraulic cylinder may be damaged. I had to suspend the operation.
【０００４】 本考案はこれに鑑み、機械の運転を止める事なく、しかも人手によるエア抜き 作業を行なわなくとも運転中にエアを自動的に除去できるようにした建設機械の 油圧回路中の気泡除去装置を提供して従来技術の持つ欠点の解消を図ることを目 的としてなされたものである。In view of the above, the present invention has made it possible to automatically remove air during operation without stopping the operation of the machine, and without manually removing the air, thereby removing bubbles in a hydraulic circuit of a construction machine. The purpose is to provide a device and solve the drawbacks of the conventional technology.
【０００５】[0005]
【課題を解決するための手段】 上記従来技術の問題点を解決する手段とし て本考案の請求項１は作動油タンクから油圧ポンプに至る吸い込み回路途中にエ ア抜きフィルタを設け、該回路内のオイルからエアを外部へ放出させることを特 徴とし、請求項２は作動油タンク内のオイルを油圧ポンプで吸い込み、吐出させ る回路とは別に、同タンク内のオイルをギヤポンプにより吸い込み、該ギヤポン プの吐出側にエア抜きフィルタを連結して、該吐出側のエアを外部に放出させ、 オイルのみをタンクに戻す循環回路を設けたことを特徴とし、請求項３は作動油 タンクから油圧ポンプに至る吸い込み回路途中にエア抜きフィルタを設け、該回 路内のオイルからエアを該タンク内に常時直接戻すようにしたことを特徴とし、 請求項４は作動油タンクから油圧ポンプに至る吸い込み回路途中にエア抜きフィ ルタを設け、該エア抜きフィルタのエア放出口と、別途設けたオイル溜め容器と を連結する管路途中に電磁弁を設け、該電磁弁を運転室に設けたスイッチにより ＯＮ、ＯＦＦさせると共に、同じく運転室に設けたモニタにより、大気へ開放さ れたエアと共に流出したオイルの該容器の満タン度を検出するようにしたことを 特徴とし、請求項５は作動油タンクから油圧ポンプに至る吸い込み回路途中にエ ア抜きフィルタを設け、該エア抜きフィルタのエア放出口と、別途設けたオイル 溜め容器とを連結する管路途中に、電磁弁と、エアを含む気泡を検出するフロ− トセンサとを設け、該フロ−トセンサの検出信号によりコントロ−ラが前記電磁 弁をＯＮ，ＯＦＦさせると共に、ガバナモ−タの回転をコントロ−ルすることを 特徴とする。[Means for Solving the Problems] As a means for solving the above-mentioned problems of the prior art, claim 1 of the present invention provides an air vent filter in the middle of a suction circuit from a hydraulic oil tank to a hydraulic pump. Is characterized in that air is discharged to the outside from the above oil, and in claim 2, the oil in the hydraulic oil tank is sucked and discharged by a gear pump separately from the circuit for discharging the oil, and An air bleeding filter is connected to the discharge side of the gear pump to provide a circulation circuit for releasing the air on the discharge side to the outside and returning only the oil to the tank. An air bleeding filter is provided in the middle of the suction circuit leading to the pump so that air from the oil in the circuit is always returned directly into the tank. The air vent filter is installed in the middle of the suction circuit from the engine to the hydraulic pump, and a solenoid valve is installed in the middle of the pipe line that connects the air outlet of the air vent filter and a separately provided oil reservoir. The switch in the driver's cab turns it on and off, and the monitor in the driver's cab also detects the tank fullness of the oil that has flowed out with the air released to the atmosphere. According to claim 5, an air vent filter is provided in the middle of the suction circuit from the hydraulic oil tank to the hydraulic pump, and an electromagnetic valve is provided in the middle of the pipeline connecting the air outlet of the air vent filter and a separately provided oil sump container. A valve and a float sensor for detecting bubbles containing air are provided, and the controller turns the solenoid valve on and off according to a detection signal from the float sensor. Banamo - the rotation of the motor controller - characterized by Le.
【０００６】[0006]
上記構成によれば建設機械の油圧回路において、回路中のエアを機械を運転し ながら回路外へ排出できる。 According to the above configuration, in the hydraulic circuit of the construction machine, the air in the circuit can be discharged to the outside of the circuit while operating the machine.
【０００７】[0007]
図１は本考案の請求項１にかかる建設機械の油圧回路の気泡除去装置の一実施 例、図２は本考案の請求項２にかかる気泡除去装置の一実施例、図３は請求項３ にかかる気泡除去装置の一実施例、図４は請求項４にかかる気泡除去装置の一実 施例、図５は請求項５にかかる気泡除去装置の一実施例、図６は図５のフロ−チ ャ−トである。 1 is an embodiment of a bubble removing device for a hydraulic circuit of a construction machine according to claim 1 of the present invention, FIG. 2 is an embodiment of a bubble removing device according to claim 2 of the present invention, and FIG. 4 is an embodiment of the bubble removing apparatus according to claim 4, FIG. 5 is an embodiment of the bubble removing apparatus according to claim 5, and FIG. 6 is a flow chart of FIG. -It is a chart.
【０００８】 以下、本考案を図１乃至図６に示す実施例を参照して説明するがエア抜きフィ ルタは公知のものを使用する。また、図１から図５までの共通部品にはすべて同 一符号を用いることとする。本考案の請求項１は、図１に示すように作動油タン ク１から油圧ポンプ２に至る吸い込み回路３途中にエア抜きフィルタ４を設け、 該回路３内のオイルからエアを外部へ放出させるようにしたものである。The present invention will be described below with reference to the embodiments shown in FIGS. 1 to 6, but a known air bleeding filter is used. Further, the same reference numerals are used for all common parts in FIGS. 1 to 5. According to claim 1 of the present invention, as shown in FIG. 1, an air bleed filter 4 is provided in the middle of the suction circuit 3 from the hydraulic oil tank 1 to the hydraulic pump 2 to discharge air from the oil in the circuit 3 to the outside. It was done like this.
【０００９】 前記油圧ポンプ２は作動油タンク１からオイルを吸い込むために、ポンプ２に 至るまでのオイルは大気圧以下となり、エアは分離し易くなる。図中の点線５は エアの放出方向を示したものである。Since the hydraulic pump 2 sucks the oil from the hydraulic oil tank 1, the oil reaching the pump 2 is at atmospheric pressure or less, and the air is easily separated. The dotted line 5 in the figure shows the direction of air release.
【００１０】 本考案の請求項２は、図２に示すように作動油タンク１内のオイルを油圧ポン プ２により吸い込み、吐出させる回路３とは別に、同タンク１内のオイルをギヤ ポンプ６により吸い込み、該ギヤポンプ６の吐出側にエア抜きフィルタ４を連結 して、該吐出側のエアを外部に放出させ、オイルのみをタンク１に戻す循環回路 ７を設けたものである。According to a second aspect of the present invention, as shown in FIG. 2, the oil in the hydraulic oil tank 1 is sucked and discharged by the hydraulic pump 2, and the oil in the tank 1 is separated from the circuit 3 by a gear pump 6 A circulation circuit 7 is provided for connecting the air suction filter 4 to the discharge side of the gear pump 6 and connecting the air bleeding filter 4 to discharge the air on the discharge side to the outside and returning only the oil to the tank 1.
【００１１】 これにより作動油タンク１内のオイルは常時気泡がタンク１外に放出されるこ とになり、気泡は除去され、したがって油圧ポンプ２の吸い込み側にはエアが混 入しなくなる。As a result, bubbles of the oil in the hydraulic oil tank 1 are constantly discharged to the outside of the tank 1, and the bubbles are removed, so that air does not enter the suction side of the hydraulic pump 2.
【００１２】 なお、気泡を除く手段としては作動油タンクのオイルを油圧ポンプで吸い込ん で、吐出させて制御弁に供給し、使用済みのオイルを該制御弁から該タンクに戻 すようにした油圧回路において、該制御弁からの該タンクに至るリタ−ン回路途 中にエア抜きフィルタを設け、オイル中のエアを外部に放出させるようにするこ ともできる。As a means for removing bubbles, the oil in the hydraulic oil tank is sucked by a hydraulic pump, discharged and supplied to a control valve, and used oil is returned from the control valve to the tank. In the circuit, an air bleeding filter may be provided in the return circuit from the control valve to the tank to discharge the air in the oil to the outside.
【００１３】 本考案の請求項３乃至５はエアの開放について具体的に示したもので、このう ち、請求項３は図３に示すように作動油タンク１から油圧ポンプ２に至る吸い込 み回路３途中にエア抜きフィルタ４を設け、該回路３内のオイルからエアを該タ ンク１内に常時直接戻すようにしたものである。Claims 3 to 5 of the present invention specifically show the release of air. In claim 3, the suction from the hydraulic oil tank 1 to the hydraulic pump 2 is shown in FIG. The air bleeding filter 4 is provided in the middle of the circuit 3 so that the air from the oil in the circuit 3 is always returned directly into the tank 1.
【００１４】 すなわち、エア抜きフィルタ４からタンク１内に気泡のみを通過させる管路８ をタンク１のオイルレベル近くの高さに連結して、エアをオイル面から放出させ るようにして、エアを油圧ポンプ２に入る手前から直接タンク１に戻すものであ る。この場合、管路８の途中に開閉自在なコックを設けて整備、修理等でエアが 回路に入った場合は、始動後マニュアル操作で大気に開放するようにエア抜きす ることも考えられるが、請求項４のようにした方がより能率的である。That is, a pipe 8 for allowing only bubbles to pass from the air bleeding filter 4 into the tank 1 is connected to a height near the oil level of the tank 1 so that the air is discharged from the oil surface. Is directly returned to the tank 1 before entering the hydraulic pump 2. In this case, it is conceivable that a cock that can be opened and closed is provided in the middle of the pipe line 8 and when air enters the circuit for maintenance or repair, the air may be bleed to be released to the atmosphere by manual operation after starting. As described in claim 4, it is more efficient.
【００１５】 本考案の請求項４は図４に示すように作動油タンク１から油圧ポンプ２に至る 吸い込み回路３途中にエア抜きフィルタ４を設け、該エア抜きフィルタ４のエア 放出口４ａと、別途設けたオイル溜め容器９とを連結する管路８途中に電磁弁１ ０を設け、該電磁弁１０を運転室１１に設けたスイッチ１２によりＯＮ、ＯＦＦ させると共に、同じく運転室１１に設けたモニタ１３により、大気へ開放された エアと共に流出したオイルの該容器９の満タン度を検出するようにしたものであ る。According to a fourth aspect of the present invention, as shown in FIG. 4, an air bleed filter 4 is provided in the middle of the suction circuit 3 from the hydraulic oil tank 1 to the hydraulic pump 2, and an air discharge port 4a of the air bleed filter 4 is provided. A solenoid valve 10 is provided in the middle of a pipe line 8 connecting to a separately provided oil sump container 9, and the solenoid valve 10 is turned on and off by a switch 12 provided in a driver's cab 11 and also provided in the driver's cab 11. The monitor 13 detects the fullness of the oil in the container 9 flowing out together with the air released to the atmosphere.
【００１６】 これによればオペレ−タはエア抜きしたい場合、スイッチ１２をＯＮすること により、これまで閉じられていた電磁弁１０が開となり、エア抜きフィルタ４か らの気泡はオイル溜め容器９内でエアが大気中に逃げ、オイルのみが容器９内に 蓄積される。そして蓄積量は運転室１１に設けられているモニタ１３で満タンを 検知すると、スイッチ１２をＯＦＦにして電磁弁１０を閉にするものである。According to this, when the operator wants to bleed air, by turning on the switch 12, the solenoid valve 10 which has been closed until now is opened, and air bubbles from the air bleeding filter 4 are removed. Inside, air escapes to the atmosphere, and only oil accumulates in the container 9. When the monitor 13 provided in the operator's cab 11 detects that the storage amount is full, the switch 12 is turned off and the solenoid valve 10 is closed.
【００１７】 本考案の請求項５は図５に示すように作動油タンク１から油圧ポンプ２に至る 吸い込み回路３途中にエア抜きフィルタ４を設け、該エア抜きフィルタ４のエア 放出口４ａと、別途設けたオイル溜め容器９とを連結する管路８途中に、電磁弁 １０と、エアを含む気泡を検出するフロ−トセンサ１４とを設け、該フロ−トセ ンサ１４の検出信号によりコントロ−ラ１５が前記電磁弁１０をＯＮ，ＯＦＦさ せると共に、エアーが規定以上の場合、ポンプ破損防止のため、エンジン回転を 低下させ、エアを除去後、回転が復帰する様、ガバナモ−タ１６の回転をコント ロ−ルするようにしたものである。According to a fifth aspect of the present invention, as shown in FIG. 5, an air bleed filter 4 is provided in the middle of the suction circuit 3 from the hydraulic oil tank 1 to the hydraulic pump 2, and an air discharge port 4a of the air bleed filter 4 is provided. A solenoid valve 10 and a float sensor 14 for detecting air bubbles including air are provided in the middle of a pipe line 8 connecting to a separately provided oil sump container 9, and a controller outputs a detection signal from the float sensor 14. 15 turns the solenoid valve 10 ON and OFF, and if the air is above the specified level, the rotation of the governor motor 16 is reduced so that the engine speed is reduced to prevent pump damage and the speed is restored after the air is removed. Is controlled.
【００１８】 すなわち、エア放出口４ａと、別途設けたオイル溜め容器９とを連結する管路 ８には電磁弁１０の手前に前記フロ−トセンサ１４が取付けられる小オイル溜め １７が設けてあり、この小オイル溜め１７に気泡がある一定の高さに蓄積される とフロ−トセンサ１４が、これを検出してコントロ−ラ１５に電磁弁１０をＯＮ に作動させると共にエンジンのガバナモ−タ１６の回転をコントロ−ルするよう に信号を送るようになっており、エアを自動大気開放するものである。なお、本 案はフロ−トセンサ１４の代わりにフォトサイリスタ等を用いてもよい。That is, a small oil reservoir 17 to which the float sensor 14 is attached is provided in front of the solenoid valve 10 in the pipe line 8 connecting the air discharge port 4a and the separately provided oil reservoir container 9, When air bubbles are accumulated in the small oil sump 17 at a certain height, the float sensor 14 detects this and causes the controller 15 to turn on the solenoid valve 10 and at the same time, the governor motor 16 of the engine. A signal is sent to control the rotation, and the air is automatically released to the atmosphere. In the present invention, a photothyristor or the like may be used instead of the float sensor 14.
【００１９】 つぎに請求項５による自動大気開放を図６に示すフロ−チャ−トにより説明す る。まず、エアの自動大気開放ためのスタ−トをする。ステップ１において吸い 込み配管３にエアがあると、小オイル溜め１７に溜まるからフロ−トセンサ１４ がこれを検出すれば、コントロ−ラ１５に信号が送られる。コントロ−ラ１５は フロ−トセンサ１４からの信号で「エアはあるか」がｙｅｓであれば電磁弁１０ をＯＮにしてエアをオイル溜め容器９に開放すると共に、「エンジン回転数がア イドリングか否か」を判断し、ｎｏの場合はガバナ信号によりロ−アイドリング にする。ステップ２ではエア抜きに要する予め設定した「大気開放時間に達した か否か」を判断してｙｅｓの場合は電磁弁１０をＯＦＦにし、ガバナモ−タ１６ の回転をスロットルレバ−に比例した信号を送ってコントロ−ルする。そしてス テップ１およびステップ２がｎｏの場合は元のフロ−に戻ってステップ１からス テップ２へのフロ−を繰り返すことになる。Next, the automatic opening to the atmosphere according to claim 5 will be described with reference to the flowchart shown in FIG. First, a start is performed to automatically release the air to the atmosphere. If air is present in the suction pipe 3 in step 1, the air is accumulated in the small oil sump 17, and if the float sensor 14 detects this, a signal is sent to the controller 15. If the controller 15 is a signal from the float sensor 14 and "Are there air?" Is yes, the solenoid valve 10 is turned on to open the air to the oil reservoir 9 and "If the engine speed is idling? If no, the governor signal is used for low idling. In step 2, it is judged whether or not the preset time required for bleeding air has been reached. If the answer is yes, the solenoid valve 10 is turned off, and the rotation of the governor motor 16 is proportional to the throttle lever. To control. When Step 1 and Step 2 are no, the original flow is returned to and the flow from Step 1 to Step 2 is repeated.
【００２０】[0020]
以上説明したように本考案は、請求項１では作動油タンクから油圧ポンプに至 る吸い込み回路途中にエア抜きフィルタを設け、該回路内のオイルからエアを外 部へ放出させ、請求項２では作動油タンク内のオイルを油圧ポンプで吸い込み、 吐出させる回路とは別に、同タンク内のオイルをギヤポンプにより吸い込み、該 ギヤポンプの吐出側にエア抜きフィルタを連結して、該吐出側のエアを外部に放 出させ、オイルのみをタンクに戻す循環回路を設け、請求項３では作動油タンク から油圧ポンプに至る吸い込み回路途中にエア抜きフィルタを設け、該回路内の オイルからエアを該タンク内に常時直接戻すようにし、請求項４では作動油タン クから油圧ポンプに至る吸い込み回路途中にエア抜きフィルタを設け、該エア抜 きフィルタのエア放出口と、別途設けたオイル溜め容器とを連結する管路途中に 電磁弁を設け、該電磁弁を運転室に設けたスイッチによりＯＮ、ＯＦＦさせると 共に、同じく運転室に設けたモニタにより、大気へ開放されたエアと共に流出し たオイルの該容器の満タン度を検出するようにし、請求項５では作動油タンクか ら油圧ポンプに至る吸い込み回路途中にエア抜きフィルタを設け、該エア抜きフ ィルタのエア放出口と、別途設けたオイル溜め容器とを連結する管路途中に、電 磁弁と、エアを含む気泡を検出するフロ−トセンサとを設け、該フロ−トセンサ の検出信号によりコントロ−ラが前記電磁弁をＯＮ，ＯＦＦさせると共に、ガバ ナモ−タの回転をコントロ−ルするようにしたから、回路中のエアを直接回路外 へ、機械を運転しながら除去できることになり、従来必要であった機械を止めて 行なっていたエア抜き作業が不要で、油圧機器のキャビテ−ションによる破損防 止が図られ、油圧機器の寿命が大幅に向上できる。 As described above, according to the present invention, in claim 1, an air bleeding filter is provided in the middle of the suction circuit from the hydraulic oil tank to the hydraulic pump, and air is discharged from the oil in the circuit to the outside. Separately from the circuit for sucking and discharging the oil in the hydraulic oil tank with a hydraulic pump, the oil in the tank is sucked with a gear pump, and an air bleed filter is connected to the discharge side of the gear pump to externally discharge the air on the discharge side. A circulation circuit for returning only oil to the tank is provided. In claim 3, an air bleed filter is provided in the middle of the suction circuit from the hydraulic oil tank to the hydraulic pump, and air from the oil in the circuit is introduced into the tank. It is always returned directly, and in claim 4, an air bleeding filter is provided in the middle of the suction circuit from the hydraulic oil tank to the hydraulic pump, and the air bleeding filter is installed. A solenoid valve is provided in the middle of the pipeline that connects the discharge port and a separately provided oil sump container, and the solenoid valve is turned on and off by a switch provided in the operator's cab, and a monitor also provided in the operator's cab The fullness of the oil outflowing with the air released to the atmosphere is detected in the container. In claim 5, an air bleeding filter is provided in the suction circuit from the hydraulic oil tank to the hydraulic pump, and the air bleeding is performed. An electromagnetic valve and a float sensor for detecting air bubbles containing air are installed in the middle of the conduit connecting the air outlet of the filter and a separately provided oil reservoir, and the detection signal from the float sensor is used. Since the controller turns the solenoid valve on and off and controls the rotation of the governor motor, the air in the circuit is removed directly from the circuit while the machine is running. Will be cut, an air vent work that has been done to stop the a mechanical conventionally required is unnecessary, hydraulic equipment of cavitation - damage prevention by Deployment is achieved, hydraulic equipment of life can be greatly improved.
【図１】本考案の請求項１にかかる建設機械の油圧回路
中の気泡除去装置の一実施例を示す説明図である。FIG. 1 is an explanatory view showing an embodiment of a bubble removing device in a hydraulic circuit of a construction machine according to claim 1 of the present invention.
【図２】本考案の請求項２にかかる気泡除去装置の一実
施例を示す説明図である。FIG. 2 is an explanatory view showing an embodiment of a bubble removing device according to claim 2 of the present invention.
【図３】本考案の請求項３にかかる気泡除去装置の一実
施例を示す説明図である。FIG. 3 is an explanatory view showing an embodiment of a bubble removing device according to claim 3 of the present invention.
【図４】本考案の請求項４にかかる気泡除去装置の一実
施例を示す説明図である。FIG. 4 is an explanatory view showing an embodiment of a bubble removing device according to claim 4 of the present invention.
【図５】本考案の請求項５にかかる気泡除去装置の一実
施例を示す説明図である。FIG. 5 is an explanatory view showing an embodiment of a bubble removing device according to claim 5 of the present invention.
【図６】図５のフロ−チャ−トを示す説明図である。FIG. 6 is an explanatory view showing the flow chart of FIG.
１ 作動油タンク ２ 油圧ポンプ ３ 吸い込み回路 ４ エア抜きフィルタ ４ａ エア放出口 ６ ギヤポンプ ７ 循環回路 ８ 管路 ９ オイル溜め容器 １０ 電磁弁 １１ 運転室 １２ スイッチ １３ モニタ １４ フロ−トセンサ １５ コントロ−ラ １６ ガバナモ−タ 1 Hydraulic Oil Tank 2 Hydraulic Pump 3 Suction Circuit 4 Air Venting Filter 4a Air Discharge Port 6 Gear Pump 7 Circulation Circuit 8 Pipeline 9 Oil Reservoir Container 10 Solenoid Valve 11 Operator's Room 12 Switch 13 Monitor 14 Float Sensor 15 Controller 16 Governor -
Claims (5)
込み回路途中にエア抜きフィルタを設け、該回路内のオ
イルからエアを外部へ放出させることを特徴とする建設
機械の油圧回路中の気泡除去装置。1. A bubble removing device in a hydraulic circuit of a construction machine, wherein an air bleeding filter is provided in the middle of a suction circuit from a hydraulic oil tank to a hydraulic pump, and air is discharged from the oil in the circuit to the outside. .
吸い込み、吐出させる回路とは別に、同タンク内のオイ
ルをギヤポンプにより吸い込み、該ギヤポンプの吐出側
にエア抜きフィルタを連結して、該吐出側のエアを外部
に放出させ、オイルのみをタンクに戻す循環回路を設け
たことを特徴とする建設機械の油圧回路中の気泡除去装
置。2. A circuit for sucking and discharging oil in a hydraulic oil tank by a hydraulic pump, the oil in the tank is sucked in by a gear pump, and an air bleeding filter is connected to the discharge side of the gear pump to discharge the oil. A bubble removal device in a hydraulic circuit of a construction machine, which is provided with a circulation circuit that discharges air from the outside to return only oil to the tank.
込み回路途中にエア抜きフィルタを設け、該回路内のオ
イルからエアを該タンク内に常時直接戻すようにしたこ
とを特徴とする建設機械の油圧回路中の気泡除去装置。3. A hydraulic system for a construction machine, wherein an air bleeding filter is provided in the middle of a suction circuit from a hydraulic oil tank to a hydraulic pump, and air from the oil in the circuit is constantly returned directly into the tank. Air bubble removal device in the circuit.
込み回路途中にエア抜きフィルタを設け、該エア抜きフ
ィルタのエア放出口と、別途設けたオイル溜め容器とを
連結する管路途中に電磁弁を設け、該電磁弁を運転室に
設けたスイッチによりＯＮ、ＯＦＦさせると共に、同じ
く運転室に設けたモニタにより、大気へ開放されたエア
と共に流出したオイルの該容器の満タン度を検出するよ
うにしたことを特徴とする建設機械の油圧回路中の気泡
除去装置。4. An air bleed filter is provided in the middle of the suction circuit from the hydraulic oil tank to the hydraulic pump, and a solenoid valve is provided in the pipeline connecting the air discharge port of the air bleed filter and a separately provided oil sump container. A solenoid valve is provided to turn on / off the solenoid valve by a switch provided in the driver's cab, and a monitor also provided in the operator's cab detects the fullness of the oil outflowing with the air and the container. A bubble removing device in a hydraulic circuit of a construction machine characterized by the above.
込み回路途中にエア抜きフィルタを設け、該エア抜きフ
ィルタのエア放出口と、別途設けたオイル溜め容器とを
連結する管路途中に、電磁弁と、エアを含む気泡を検出
するフロ−トセンサとを設け、該フロ−トセンサの検出
信号によりコントロ−ラが前記電磁弁をＯＮ，ＯＦＦさ
せると共に、ガバナモ−タの回転をコントロ−ルするこ
とを特徴とする建設機械の油圧回路中の気泡除去装置。5. An electromagnetic valve is provided in the middle of a suction circuit from a hydraulic oil tank to a hydraulic pump, and a solenoid valve is provided in a pipeline connecting an air discharge port of the air bleed filter and an oil reservoir provided separately. And a float sensor for detecting air bubbles including air, and the controller turns on and off the solenoid valve according to the detection signal of the float sensor and controls the rotation of the governor motor. The air bubble removal device in the hydraulic circuit of the characteristic construction machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992076951U JP2593833Y2 (en) | 1992-10-12 | 1992-10-12 | Air bubble removal device in hydraulic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992076951U JP2593833Y2 (en) | 1992-10-12 | 1992-10-12 | Air bubble removal device in hydraulic circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0634703U true JPH0634703U (en) | 1994-05-10 |
| JP2593833Y2 JP2593833Y2 (en) | 1999-04-19 |
Family
ID=13620086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992076951U Expired - Fee Related JP2593833Y2 (en) | 1992-10-12 | 1992-10-12 | Air bubble removal device in hydraulic circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2593833Y2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009299525A (en) * | 2008-06-11 | 2009-12-24 | Toshiba Corp | Hydraulic pressure generating device |
| JP2014229203A (en) * | 2013-05-24 | 2014-12-08 | 板橋理化工業株式会社 | Circulation device |
| CN113267378A (en) * | 2021-05-25 | 2021-08-17 | 国网河北省电力有限公司检修分公司 | Get oily device and get oily system |
| CN114225476A (en) * | 2022-01-19 | 2022-03-25 | 智火柴科技(深圳)有限公司 | Bubble eliminating device for oil liquid oil path |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101203820B1 (en) | 2011-03-17 | 2012-11-22 | 현대위아 주식회사 | Device and method for controlling air bleeding for hydra |
-
1992
- 1992-10-12 JP JP1992076951U patent/JP2593833Y2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009299525A (en) * | 2008-06-11 | 2009-12-24 | Toshiba Corp | Hydraulic pressure generating device |
| JP2014229203A (en) * | 2013-05-24 | 2014-12-08 | 板橋理化工業株式会社 | Circulation device |
| CN113267378A (en) * | 2021-05-25 | 2021-08-17 | 国网河北省电力有限公司检修分公司 | Get oily device and get oily system |
| CN114225476A (en) * | 2022-01-19 | 2022-03-25 | 智火柴科技(深圳)有限公司 | Bubble eliminating device for oil liquid oil path |
| CN114225476B (en) * | 2022-01-19 | 2024-05-14 | 智火柴科技(深圳)有限公司 | Bubble eliminating device for oil way |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2593833Y2 (en) | 1999-04-19 |
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