Einführung in die Ölhydraulik

Matthies, Hans Jürgen; Renius, Karl Theodor

doi:10.1007/978-3-658-06715-1

Cited by 14 publications

(2 citation statements)

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“…The second test is done with the optimized system and two different oils with the viscosity grades 32 and 10 (AVIA FLUID HLPD 32 and AVIA FLUID RSL 10), which leads to the viscosities of 76 mm²/s and 19 mm²/s at room temperature. The viscosities as a function of the temperature are calculated with the formulas of Ubbelohde and Walter respectively DIN 51563 [3,4,5].…”

Section: Methodsmentioning

confidence: 99%

Energetic Optimization of an Existing Clamping Powerpack by System and Control Concept Analysis and Adaption of the Hydraulic Fluid Viscosity

Gattinger,

Schwimmer

2024

14th International Fluid Power Conference

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Many hydraulic systems that have been in operation for several years are planned to be used further on some time. As nowadays the design objectives and possibilities are a lot more focused on energy efficiency than at the time these machines were build, retrofit activities such as energetic optimization are often useful in existing installations.The clamping powerpack of an automated milling station is examined according to the control strategy of the pump motor by systematic measuring and recording of all relevant system parameters like operating status of the motor, activation status of control valves and pressure switches as well as the different hydraulic pressures in the system.The system evaluation showed that the motor is driven at constant speed on demand by the controller of the milling station but with a time limited switch-on time, which leads to high losses due to oil flow over the systems relief valve. By improving the hydraulic system design, due to the addition of a pressure accumulator, and changing the control signal of the motor to a separate pressure switch, the energy consumption of the clamping powerpack is reduced by 89 %. In addition, the hydraulic oil viscosity was found to have no significant influence on the efficiency of the powerpack, which was presumed because of the specific application, where pressure, not flow, is the predominant parameter.

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Section: Methodsmentioning

confidence: 99%

Energetic Optimization of an Existing Clamping Powerpack by System and Control Concept Analysis and Adaption of the Hydraulic Fluid Viscosity

Gattinger,

Schwimmer

2024

14th International Fluid Power Conference

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“…The main advantages over other controlled oil pumps -such as external-gear and vane pumps [1] -derive from the combination of robustness with respect to contaminants (e.g., due to soot and other particles), its high overall efficiency over the entire service life, and its suitability for high engine speeds. Various control strategies with short adjustment and response times are possible.…”

Section: More Compact Designmentioning

confidence: 99%

Combined oil-vacuum pump

2015

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In view of stricter CO 2 targets, further optimisation of frictional loss in the powertrain is necessary. This includes not only reducing engine friction, caused among others by the piston group or the bearing journals themselves, but also lowering the power con sumption of engine accessories. In this article, Mahle illustrates how combining a pendulum-slider oil pump and a vacuum pump into a single module provides potential weight and package savings besides the benefits of highly efficient and wear-resistant operating map control of the oil pump. COVER STORY FUELS AND LUBRICANTS COVER STORY FUELS AND LUBRICANTS

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Chassis Design

Renius¹

2019

Fundamentals of Tractor Design

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Einführung in die Ölhydraulik

Cited by 14 publications

References 0 publications

Energetic Optimization of an Existing Clamping Powerpack by System and Control Concept Analysis and Adaption of the Hydraulic Fluid Viscosity

Energetic Optimization of an Existing Clamping Powerpack by System and Control Concept Analysis and Adaption of the Hydraulic Fluid Viscosity

Combined oil-vacuum pump

Chassis Design

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