A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
HYDRAULIC DRIVE SYSTEM OF CONSTRUCTION EQUIPMENT
PROBLEM TO BE SOLVED: To provide a hydraulic drive system reducing an energy loss produced when reducing the aperture of a gyration control valve for hydraulic fluid returning to a tank.SOLUTION: A hydraulic drive system 10 of construction equipment comprises: a gyration motor 21; a gyration control valve 40 connected to the gyration motor 21 through a left turn supply line 33 and a right turn supply line 34; and an operation valve 50 outputting a left turn pilot pressure or a right turn pilot pressure to the gyration control valve 40 by receiving gyration operation. The hydraulic drive system also comprises: a first releasing line 71 branched from the right turn supply line 34; a second releasing line 72 branched from the left turn supply line 33; and a releasing device in which during left turn acceleration, the hydraulic fluid is released from the right turn supply line 34 to a tank 23 via the first releasing line 71 while during right turn acceleration, the hydraulic fluid is released from the left turn supply line 33 to the tank 23 via the second releasing line 72.SELECTED DRAWING: Figure 1
【課題】タンクへ戻る作動油が旋回制御弁で絞られることによって生じるエネルギー損失を低減する油圧駆動システムを提供する。【解決手段】建設機械の油圧駆動システム１０は、旋回モータ２１と、左旋回供給ライン３３及び右旋回供給ライン３４により旋回モータ２１と接続された旋回制御弁４０と、旋回操作を受けて、左旋回パイロット圧又は右旋回パイロット圧を旋回制御弁４０に出力する操作弁５０とを備える。右旋回供給ライン３４から分岐する第１逃しライン７１と、左旋回供給ライン３３から分岐する第２逃しライン７２と、左旋回加速時に、右旋回供給ライン３４から第１逃しライン７１を介して作動油をタンク２３に逃がし、右旋回加速時に、左旋回供給ライン３３から第２逃しライン７２を介して作動油をタンク２３に逃す、逃し機構と、を備える。【選択図】図１
HYDRAULIC DRIVE SYSTEM OF CONSTRUCTION EQUIPMENT
PROBLEM TO BE SOLVED: To provide a hydraulic drive system reducing an energy loss produced when reducing the aperture of a gyration control valve for hydraulic fluid returning to a tank.SOLUTION: A hydraulic drive system 10 of construction equipment comprises: a gyration motor 21; a gyration control valve 40 connected to the gyration motor 21 through a left turn supply line 33 and a right turn supply line 34; and an operation valve 50 outputting a left turn pilot pressure or a right turn pilot pressure to the gyration control valve 40 by receiving gyration operation. The hydraulic drive system also comprises: a first releasing line 71 branched from the right turn supply line 34; a second releasing line 72 branched from the left turn supply line 33; and a releasing device in which during left turn acceleration, the hydraulic fluid is released from the right turn supply line 34 to a tank 23 via the first releasing line 71 while during right turn acceleration, the hydraulic fluid is released from the left turn supply line 33 to the tank 23 via the second releasing line 72.SELECTED DRAWING: Figure 1
【課題】タンクへ戻る作動油が旋回制御弁で絞られることによって生じるエネルギー損失を低減する油圧駆動システムを提供する。【解決手段】建設機械の油圧駆動システム１０は、旋回モータ２１と、左旋回供給ライン３３及び右旋回供給ライン３４により旋回モータ２１と接続された旋回制御弁４０と、旋回操作を受けて、左旋回パイロット圧又は右旋回パイロット圧を旋回制御弁４０に出力する操作弁５０とを備える。右旋回供給ライン３４から分岐する第１逃しライン７１と、左旋回供給ライン３３から分岐する第２逃しライン７２と、左旋回加速時に、右旋回供給ライン３４から第１逃しライン７１を介して作動油をタンク２３に逃がし、右旋回加速時に、左旋回供給ライン３３から第２逃しライン７２を介して作動油をタンク２３に逃す、逃し機構と、を備える。【選択図】図１
HYDRAULIC DRIVE SYSTEM OF CONSTRUCTION EQUIPMENT
建設機械の油圧駆動システム
KONDO TETSUHIRO (author) / YUMITATSU YOJI (author) / ITO MAKOTO (author)
2016-05-23
Patent
Electronic Resource
Japanese