US20110056194A1 - Hydraulic system for heavy equipment
US20110056194A1 US12/938,897 US93889710A US2011056194A1 US 20110056194 A1 US20110056194 A1 US 20110056194A1 US 93889710 A US93889710 A US 93889710A US 2011056194 A1 US2011056194 A1 US 2011056194A1 Authority US United States Prior art keywords hydraulic heavy equipment actuators manifold pumps Prior art date Liming …
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Improved Hydraulic System Design and Control Benefit
Nov 18, 2021 · Volvo CE's new digital hydraulic actuator enables the design of a new type of hydraulic system which overcomes some of the shortcomings found in traditional systems. Volvo Construction Equipment. Efficiency is a key design criteria for almost all components and systems on a piece of heavy-duty equipment—as well as for the machine itself.
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Select the right motor for your hydraulic applications
Oct 07, 2015 · Sometimes this is also referred to as running torque. The rotational speed of the motor shaft is measured in units of rotations per minute (rpm). Motor speed is a function of hydraulic input flow and motor displacement. Pressure is generated by resistance to hydraulic flow. The more resistance, the higher the pressure.
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Energy Regeneration and Reuse of Excavator Swing System
Oct 01, 2019 · The flywheel inertia is selected based on a 5-ton excavator. In the testbench, the flywheel inertia is 8.985 kg m 2 and connects to the hydraulic motor directly without gear. In the real swing system, the upper structure connects to the hydraulic motor through a gear, in which the gear ratio is about 1:100 to 1:200.
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China Excavator Attachments, Excavator Attachments
Excavator Attachment Manufacturer. Hill Engineering has been a global manufacturer & exporter of award-winning excavator attachments since 1994. We manufacture a range of fully automatic quick couplers – the TEFRA range, to suit excavators ranging from 2 Ton to 120 Ton. We also manufacture a range of excavator buckets – the TITAN range.
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317 Hydraulic Excavator | Cat | Caterpillar
The 317 Hydraulic Excavator boosts productivity on your jobsite. Standard, easy-to-use Cat® technologies, performance upgrades, and low fuel and maintenance costs allow you to move material all day with speed and precision while keeping more money in your pocket.
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Improved Hydraulic System Design and Control Benefit
Nov 18, 2021 · Volvo CE's new digital hydraulic actuator enables the design of a new type of hydraulic system which overcomes some of the shortcomings found in traditional systems. Volvo Construction Equipment. Efficiency is a key design criteria for almost all components and systems on a piece of heavy-duty equipment—as well as for the machine itself.
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Traveling speed changeover device for hydraulic excavator
Jul 16, 1992 · Industrial Applicability. The present invention provides a traveling speed changeover device for a hydraulic excavator, capable of changing the traveling speed over three or more speed stages so as to facilitate selection of traveling speed according to the conditions of the road and the state of the work, while improving the simultaneous operation …
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Investigation of Excavator Performance Factors in an Open
made ranging from electronically optimized pump management systems, a closed-loop swing that provides highest power when needed, independent cool-ing systems that allow the machine to run full speed, to highpressure hydraulics - [1] [5]. Over the years, not only has the size of the hydraulic excavator grown, but so has the machine's reliability.
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How Mini Excavator Hydraulic Systems Work
Mar 22, 2016 · How Mini Excavator Hydraulic Systems Work. Compact excavators would be less awesome without the gallons of fluid coursing through their hydraulic veins. Absent the hydraulics, modern excavators would still clank and grind, using cables, chains and gears to accomplish their work, instead of hum as they pirouette and activate boom-end tools.
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Power Matching and Energy Efficiency Improvement of
Dec 04, 2019 · Shi et al. proposed a velocity and position control system based on independent metering system for a hydraulic excavator. Although many technologies have been made to improve the energy efficiency of the hydraulic excavator, such as hybrid technology.
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Investigation of Excavator Performance Factors in an Open
Over the years, not only has the size of the hydraulic excavator grown, but so has the machine's reliability. The excavator cycle time comprises of the following components: swing time (25%), bucket fill time (41%), swing time for a full bucket (24%) and dumping time, (10%).
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The Seven Most Common Hydraulic Equipment Mistakes
How Mini Excavator Hydraulic Systems Work
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Complete Guide to Hydraulic Systems: Understanding Hydraulics
Oct 15, 2019 · Other machines that make use of hydraulics include vehicles on construction sites. Diggers, cranes, bulldozers and excavators can all be run by robust hydraulic systems. A digger, for example, powers its massive arm with hydraulic-powered rams. The fluid is pumped into the thin pipes, lengthening the rams and, by extension, the arm.
Get a quoteEnergy Regeneration and Reuse of Excavator Swing System
Oct 01, 2019 · The flywheel inertia is selected based on a 5-ton excavator. In the testbench, the flywheel inertia is 8.985 kg m 2 and connects to the hydraulic motor directly without gear. In the real swing system, the upper structure connects to the hydraulic motor through a gear, in which the gear ratio is about 1:100 to 1:200.
Get a quoteUS20110056194A1 - Hydraulic system for heavy equipment
US20110056194A1 US12/938,897 US93889710A US2011056194A1 US 20110056194 A1 US20110056194 A1 US 20110056194A1 US 93889710 A US93889710 A US 93889710A US 2011056194 A1 US2011056194 A1 US 2011056194A1 Authority US United States Prior art keywords hydraulic heavy equipment actuators manifold pumps Prior art date Kefid …
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Mobile hydraulics troubleshooting, Pt. 2
Mar 21, 2016 · They are all fed a supply of hydraulic fluid from the same "P" line (red) inside the valve manifold. The directional valves all exhaust to the same "T" line (blue) that is routed back to the tank. Each directional valve provides variable speed (proportional flow) control for cylinder extend and retract motion.
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Hydraulics Trouble Shooting Guide
As 8 A 1. hydraulic fluid dirty 2. hydraulic fluid foams 1. Stick-slip effect due to the friction of the cylinder packings being too high. 2. operating below lower limit of motor speed insufficient load counter-balance (e.g. lowering control valve) D Power Take-off either does not turn at all, or - too Slowly (insufficient or no delivery flow)
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Hydraulics Trouble Shooting Guide
As 8 A 1. hydraulic fluid dirty 2. hydraulic fluid foams 1. Stick-slip effect due to the friction of the cylinder packings being too high. 2. operating below lower limit of motor speed insufficient load counter-balance (e.g. lowering control valve) D Power Take-off either does not turn at all, or - too Slowly (insufficient or no delivery flow)
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HITACHI – Service Manual Download
HITACHI ZAXIS 160LC 180LC 180LCN EXCAVATOR Service Repair Manual. Hitachi ZX160LC-3, ZX180LC-3, ZX180LCN-3 Hydraulic Excavator Service Repair Manual. HITACHI ZAXIS ZX 200, 225, 230, 270 (CLASS) EXCAVATOR Service Repair Manual. HITACHI ZAXIS 200-3 225US-3 225USR-3 240-3 270-3 CLASS EXCAVATOR Service Repair Manual.
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