Electro-hydraulic systems for recovering and reusing potential energy
A technology of hydraulic system and hydraulic actuator, which is applied in the direction of fluid pressure actuation system components, accumulator devices, servo meter circuits, etc. And other issues
Inactive Publication Date: 2017-02-15
CATERPILLAR INC
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
However, the hydraulic circuit in Bruun may not efficiently recover or reuse the potential energy of the lowered load, and the system may be complex and costly
Method used
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[0013] Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference signs will be used throughout the drawings to indicate the same or similar parts.
[0014] figure 1 An exemplary machine 10 is shown that has a number of systems and components that cooperate with each other to accomplish tasks. The machine 10 may be embodied as a fixed machine or a mobile machine that performs certain types of operations associated with industries such as mining, construction, agriculture, transportation, or other industries known in the art. For example, the machine 10 may be an earth-moving machine, such as an excavator ( figure 1 Shown in), wheel loaders, shovel excavators, bulldozers, backhoes, telescopic forklifts, motor graders, dump trucks or any other earth-moving machinery. The machine 10 may include an appliance system 12 configured to move the work tool...
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The hydraulic system (50) includes a hydraulic actuator (30), a pump (54) configured to supply fluid to the hydraulic actuator (30), and a first reservoir fluidly connected to the hydraulic actuator (30). device (72). The first accumulator (72) is configured to store fluid received from the hydraulic actuator (30). The hydraulic system (50) also includes a motor (84, 184, 284) drivingly connected to the pump (54) and fluidly connected to the first accumulator (72). The motor (84, 184, 284) is configured to receive stored fluid from the first accumulator (72) to drive the pump (54). The hydraulic system (50) further includes a first discharge valve (78) fluidly connected between the first accumulator (72) and the hydraulic actuator (30). The first discharge valve (78) is configured to supply the stored fluid from the first accumulator (72) to the hydraulic actuator (30), while the stored fluid from the first accumulator (72) No circulation by pump (54).
Description
Technical field [0001] The present disclosure generally relates to an electro-hydraulic system, and more specifically, to an electro-hydraulic system for recovering and reusing potential energy. Background technique [0002] Machinery (e.g., wheel loaders, excavators, shovel excavators, bulldozers, backhoes, telescopic forklifts, etc.) can be used to move heavy loads such as soil, building materials, and / or debris. Machinery can use appliances to move loads. The appliance can be powered by a hydraulic system, which can use pressurized fluid to actuate hydraulic actuators to move the appliance. [0003] During mechanical operation, the appliance can be lifted to a raised position. Since the appliance may be heavier, potential energy can be obtained when the appliance is lifted to an elevated position. When the appliance is released from the raised position, this potential energy can be converted into heat when pressurized hydraulic fluid is squeezed out of the hydraulic actuator ...
Claims
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IPC IPC(8): F15B15/18E02F9/22F15B13/02
CPCE02F9/2217E02F9/2292E02F9/2296F15B1/033F15B21/14F15B2211/3058F15B2211/30575F15B2211/20569F15B2211/20576F15B2211/212F15B2211/214F15B2211/20507F15B2211/20546F15B2211/761F15B2211/88F15B2211/7053F15B2211/7128F15B2211/6346F15B2211/6306F15B2211/6336F15B2211/6343
Inventor 章佼马鹏飞尚同林G·V·闻B·E·尼尔松D·陈
Owner CATERPILLAR INC