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  • Finite Element Analysis of Working Device for Hydraulic

    Mechanical analysis of hydraulic excavator in the typical work condition Composition of the working device of hydraulic excavator: The working device of YC225LC-8 type hydraulic backhoe excavator was composed of boom mechanism, bucket rod mechanism, bucket mechanism, linkage mechanism and so on, using the principle of link mechanism.

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  • Chapter 4 Engineering Classification of Rock Materials

    hydraulic erodibility of rock include rock type, color, particle size, texture, hardness, and strength. Seismic velocity, weathering, and secondary cavities are prop-erties related to both the rock material and mass. Rock material properties can be described in the field using …

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  • Trenching and Excavation Basics

    Trenching and Excavation Basics Loss Control Bulletin LCS 5004 (11-2014) 1 Trenching and Excavation Basics On average, two workers are killed every month in trench collapses. Trenching and excavation work presents serious hazards to all workers involved. Cave-ins pose the greatest risk and are much more likely than other excavation-related

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  • Excavator - Wikipedia

    Modern hydraulic excavators come in a wide variety of sizes. The smaller ones are called mini or compact excavators. For example, Caterpillar's smallest mini-excavator weighs 2,060 pounds (930 kg) and has 13 hp; their largest model is the largest excavator available (developed and produced by the Orenstein & Koppel, Germany, until the takeover 2011 by Caterpillar, named »RH400«), the CAT

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  • Hydraulic Excavators - Hitachi Construction Machinery

    Since 1965 when Hitachi, Ltd. developed the UH03, Japan's first hydraulic excavator made purely with domestic technologies (The Japan Society of Mechanical Engineers, Mechanical Engineering Heritage Listing No. 48), Hitachi Hydraulic Excavator has been a flagship product of Hitachi Construction Machinery, which has continued to pursue high reliability and superior operability.

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  • Study on Value Evaluation Model of Used Excavators Based

    Jul 08, 2018 · Considering the difference and similarity of construction machinery, the typical single bucket hydraulic excavator is selected to verify the evaluation method. AHP method is adopted to analyse and determine the influence factors, comprehensive parameters and adjustment coefficient of used excavator, as well as their weights, and then determine

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  • PC490LC-11 large hydraulic excavator | Komatsu

    Built for high production jobs, the PC490LC-11 is a large but portable excavator with a heavy-duty reinforced undercarriage for high lift capacity, lateral stability and added durability. Large high-strength steel castings on the boom, arm and bucket link. Closed …

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  • Study on Value Evaluation Model of Used Excavators …

    EXCAVATOR Hydraulic excavator how it works: Construction

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  • Construction machinery_ Excavator hydraulic pump failure

    Sep 13, 2021 · Construction machinery_ Excavator hydraulic pump failure_ Control principle. The hydraulic pump used in the large excavator (dh220, 280 and other models) is K3V series swashplate axial piston pump. Its structure is a through shaft double piston pump, followed by an auxiliary pump to provide power for remote control.

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  • Estimation of Hydraulic Backhoes Productivity for

    hydraulic excavator Hitachi EX-3600 (backhoe) with a bucket capacity of 20 m 3, wheel bulldozer CAT-834 and where: c1 – correction coefficient (0.5–0.75). Approximation of the dependence of maximum digging radius of the backhoe at the level of dump truck

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  • Best Hydraulic Breaker/Hammer for Excavator - Attachments

    The hydraulic breaker is a powerful percussion hammer fitted to an excavator for demolishing concrete structures or rocks. It can be mounted on all different brands of excavators and other carriers like skid steer loader, backhoe loader, wheel loader, and so on. Application: 1.Mining: Mountains, mining, crushing, secondary crushing. 2.

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  • Finite Element Analysis of Working Device for Hydraulic

    is 55°; B is coefficient of cutting edge width, B=1+2.6b, Where B is the average width of bucket, thus b is 13.1 cm,B is 4. 406; A is coefficient of cutting angle variation influence, here A is 1.3; Z is coefficient with bucket teeth, Z is 0.75(Z is 1 without bucket teeth); x is

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  • Excavators | Cat | Caterpillar

    Excavators. No matter what type of work you do - excavation, trenching, or truck loading - Cat® excavators deliver top performance, unmatched versatility, and excellent fuel efficiency. Simple operation, outstanding durability and the latest safety and technology …

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  • Hydraulic Pressure Loss – Engineering Success

    Hydraulic Pressure Loss. Hydraulic pressure loss is everywhere . As a fluid is forced from one point to another, certain forces act on the fluid that cause it to lose and in one case (the case of elevation) potentially gain pressure. If you are an engineer that deals with hydraulic pressure then you are likely familiar with hydraulic calculations.

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  • Simulation and Evaluation Technique for Power System and

    hydraulic excavators, with newly developed power systems having higher efficiencies. It is difficult to measure energy losses of an actual hydraulic excavator in practical operation, because a multiplicity of actuators are operated simultaneously and detailed energy evaluation on them cannot easily be done.

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  • Hydraulic Coefficients of an Orifice - The Constructor

    🕑 Reading time: 1 minute The laboratory experiment procedure to determine hydraulic coefficients of an orifice is explained in this article. The coefficient of contraction, the coefficient of velocity and coefficient of discharge are hydraulic coefficients of an orifice. Contents:Theory1. Coefficient of Contraction (Cc)2. Coefficient of Velocity (Cv)3. Coefficient of discharge (Cd)Apparatus

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  • Hydraulic Excavator - Specstch.com

    Tata Hitachi EX350 LCH Hydraulic Excavator. alex-March 8, 2020. Takeuchi TB1140 Hydraulic Excavator. alex-March 8, 2020. Tata Hitachi ZAXIS850 Hydraulic Excavator. alex-March 8, 2020. Tata Hitachi ZAXIS850LC Hydraulic Excavator. alex-March 8, 2020. Tata Hitachi ZAXIS870H Hydraulic Excavator.

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  • ESTIVATE: a model for calculating excavator productivity

    Jan 01, 2000 · Hydraulic excavator cycle time and associated unit costs of excavation for given input estimating data, for machines operating in the UK construction industry, are predicted. Using multiple regression analysis, three variables are identified as accurate predictors of cycle time: machine weight, digging depth and machine swing angle. With a coefficient of determination (R2) of 0.88, a mean

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  • Simulation analysis of potential energy recovery system of

    Nov 11, 2017 · A new hydraulic hybrid excavator potential energy recovery system is proposed in this paper. The energy recovery system uses threechamber cylinders (TCCs) and accumulators to recover potential energy during work cycle. Within this structure, there is no throttle valve in the primary loop, and the recovered energy is stored in the form of hydraulic energy. Hence, energy loss of throttle valve

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  • Simulation and modeling of a hydraulic system in FluidSim

    Hydraulic system used for modeling and simulation is a simple open hydraulic system, which can be used as applications such as: excavator actuation system for a bucket, hydraulic press, elevator system, etc. The hydraulic system consists of: a reservoir (tank) which …

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