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A platform for research: civil engineering, architecture and urbanism
HYDRAULIC SHOVEL AND HYDRAULIC SHOVEL CONTROL METHOD
To suppress occurrence of an overrun phenomenon.SOLUTION: A hydraulic shovel includes: a power takeoff; an engine connected to the power takeoff; a hydraulic pump for turning which is connected to the power takeoff and is driven by the engine; a hydraulic motor for turning which is driven by hydraulic oil discharged from the hydraulic pump for turning; a first main oil passage for connecting a first discharge port of the hydraulic pump for turning and a first suction port of the hydraulic motor for turning; a second main oil passage for connecting a second discharge port of the hydraulic pump for turning and a second suction port of the hydraulic motor for turning; a neutral holding valve which is arranged in the first main oil passage and the second main oil passage, and controls passage of the hydraulic oil; a regenerative energy absorption device which is connected to the power takeoff and absorbs regenerative energy generated by the hydraulic oil supplied to the hydraulic pump for turning from the hydraulic motor for turning through a meter-out opening of the neutral holding valve; and a valve control part for controlling an area of the meter-out opening based on the state of the regenerative energy absorption device.SELECTED DRAWING: Figure 1
【課題】オーバラン現象の発生を抑制すること。【解決手段】油圧ショベルは、パワーテイクオフと、パワーテイクオフに連結されるエンジンと、パワーテイクオフに連結され、エンジンにより駆動される旋回用油圧ポンプと、旋回用油圧ポンプから吐出された作動油により駆動する旋回用油圧モータと、旋回用油圧ポンプの第１吐出口と旋回用油圧モータの第１吸込口とを接続する第１主油通路と、旋回用油圧ポンプの第２吐出口と旋回用油圧モータの第２吸込口とを接続する第２主油通路と、第１主油通路及び第２主油通路に配置され、作動油の通過を制御する中立保持弁と、パワーテイクオフに連結され、中立保持弁のメータアウト開口を介して旋回用油圧モータから旋回用油圧ポンプに供給された作動油により発生する回生エネルギーを吸収する回生エネルギー吸収機器と、回生エネルギー吸収機器の状態に基づいてメータアウト開口の面積を制御するバルブ制御部と、を備える。【選択図】図１
HYDRAULIC SHOVEL AND HYDRAULIC SHOVEL CONTROL METHOD
To suppress occurrence of an overrun phenomenon.SOLUTION: A hydraulic shovel includes: a power takeoff; an engine connected to the power takeoff; a hydraulic pump for turning which is connected to the power takeoff and is driven by the engine; a hydraulic motor for turning which is driven by hydraulic oil discharged from the hydraulic pump for turning; a first main oil passage for connecting a first discharge port of the hydraulic pump for turning and a first suction port of the hydraulic motor for turning; a second main oil passage for connecting a second discharge port of the hydraulic pump for turning and a second suction port of the hydraulic motor for turning; a neutral holding valve which is arranged in the first main oil passage and the second main oil passage, and controls passage of the hydraulic oil; a regenerative energy absorption device which is connected to the power takeoff and absorbs regenerative energy generated by the hydraulic oil supplied to the hydraulic pump for turning from the hydraulic motor for turning through a meter-out opening of the neutral holding valve; and a valve control part for controlling an area of the meter-out opening based on the state of the regenerative energy absorption device.SELECTED DRAWING: Figure 1
【課題】オーバラン現象の発生を抑制すること。【解決手段】油圧ショベルは、パワーテイクオフと、パワーテイクオフに連結されるエンジンと、パワーテイクオフに連結され、エンジンにより駆動される旋回用油圧ポンプと、旋回用油圧ポンプから吐出された作動油により駆動する旋回用油圧モータと、旋回用油圧ポンプの第１吐出口と旋回用油圧モータの第１吸込口とを接続する第１主油通路と、旋回用油圧ポンプの第２吐出口と旋回用油圧モータの第２吸込口とを接続する第２主油通路と、第１主油通路及び第２主油通路に配置され、作動油の通過を制御する中立保持弁と、パワーテイクオフに連結され、中立保持弁のメータアウト開口を介して旋回用油圧モータから旋回用油圧ポンプに供給された作動油により発生する回生エネルギーを吸収する回生エネルギー吸収機器と、回生エネルギー吸収機器の状態に基づいてメータアウト開口の面積を制御するバルブ制御部と、を備える。【選択図】図１
HYDRAULIC SHOVEL AND HYDRAULIC SHOVEL CONTROL METHOD
油圧ショベル及び油圧ショベルの制御方法
SUMINO WATARU (author) / NAGURA SHINOBU (author) / YOKOYAMA YUKI (author) / IKEDA MASATOSHI (author)
2022-10-06
Patent
Electronic Resource
Japanese
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