Innovative Forging Process Allows Safer and Cost Effective Heavy Duty Landing String for Deepwater Applications

2016 ◽  
Author(s):  
Laurent Bordet ◽  
Jonathan Franchi ◽  
Scott Granger ◽  
Andre Vierke
Keyword(s):  
Cost Effective ◽  
Heavy Duty ◽  
Forging Process

Co-Simulation Research of the Balancing Control of the Moving Beam of a Heavy Hydraulic Press During the Die Forging Process

2017 ◽  
Author(s):  
Wenzhu Wang ◽  
Dong Du ◽  
Rendong Wu ◽  
Chaolong Yuan ◽  
Baohua Chang
Keyword(s):  
Control Process ◽  
Virtual Prototype ◽  
Hydraulic Press ◽  
Heavy Duty ◽  
Eccentric Load ◽  
Forging Process ◽  
Die Forging ◽  
Moving Beam ◽  
Synchronous Rectification ◽  
Balancing Control

A virtual prototype of the moving beam balancing system of a heavy-duty hydraulic press working under die forging function is built with Adams, AMESim and Simulink, and the balancing control process is analyzed using this prototype. The moving beam of the heavy-duty hydraulic press may tilt due to the eccentric load during the die forging processing, and thus affect the forging quality and the safety of the press. So it is necessary to research the beam balancing control process. Compared to the traditional methods based on simplified mathematical models, virtual prototype technology can obtain a co-simulation model, avoid tedious formula derivation and solving work, and save test time and cost. Based on the analysis of the working principle of balancing system, this paper establishes a dynamical model of the moving beam, a hydraulic circuit model of the single balancing system and a controller model using Adams, AMESim and Simulink, respectively. Then a virtual prototype is built using the three models via co-simulation interface files. The eccentric load signal is constructed in AMESim according to the variation of eccentric load during die forging process. By adjusting the controller parameters, the rapid balancing of the moving beam under eccentric load conditions is realized, and high precision of dynamic balancing and steady equilibrium is obtained. The simulation results show that the single balancing unit can achieve effective balancing of the moving beam, and the co-simulation analysis method based on the virtual prototype built with Adams, AMESim and Simulink is feasible in the research of the synchronous rectification of the moving beam. This work is a useful exploration in the research of synchronous rectification of moving beams.

scholarly journals An active seat suspension design for vibration control of heavy-duty vehicles

2016 ◽  
Vol 35 (4) ◽  
pp. 264-278 ◽  
Author(s):  
Donghong Ning ◽  
Shuaishuai Sun ◽  
Jiawei Zhang ◽  
Haiping Du ◽  
Weihua Li ◽  
...  
Keyword(s):  
Ride Comfort ◽  
Cost Effective ◽  
Basic Structure ◽  
Suspension System ◽  
Heavy Duty ◽  
Linear Motors ◽  
Seat Suspension ◽  
Output Torque ◽  
Hydraulic Cylinders ◽  
Heavy Duty Vehicles

This paper presents the design, fabrication and testing of an innovative active seat suspension system for heavy-duty vehicles. Rather than using conventional linear actuators, such as hydraulic cylinders or linear motors, which need to be well maintained and are always expensive when high force outputs are required, the proposed seat suspension system directly applies a rotary motor in order to provide the required active actuation, without changing the basic structure of the existing off-the-shelf seat suspension. A gear reducer is also applied to amplify the output torque of the motor so that a high output torque can be achieved using a low rated power motor. A static output feedback [Formula: see text] controller with friction compensation is designed to actively reduce seat vibration. Experiments are carried out to test the fabricated suspension prototype. The experimental results show that this type of seat suspension can achieve greater ride comfort in the frequency range of 2–6 Hz than a passive seat suspension. The newly designed active seat suspension is much more cost effective and can be suitable for heavy-duty vehicles.

Combined Cycle Inlet Air Cooling by Cold Thermal Storage: Aeroderivative vs. Heavy Duty GT Comparison

2011 ◽  
Author(s):  
G. Barigozzi ◽  
N. Palestra ◽  
A. Perdichizzi ◽  
G. Salvitti
Keyword(s):  
Cost Effective ◽  
Thermal Storage ◽  
Combined Cycle ◽  
Numerical Code ◽  
Specific Power ◽  
Air Cooling ◽  
Heavy Duty ◽  
Reference Case ◽  
Pressure Drops ◽  
Pressure Losses

An assessment of energetic performance achievable by GT inlet air cooling through cold thermal storage is presented. Results have been obtained by a numerical code specifically developed to model the whole system behavior all over a year. Some cases with hot climatic condition have been compared and discussed in order to enlighten performance differences due to GT characteristics and possible enhancement strategies for different configurations. An existing 127 MWe combined cycle power plant with a twin GT configuration was assumed as a reference case. Two heavy-duty units with different technology levels have been compared with an advanced aero-derivative model, in the range of 40 MW power output. Aero-derivative unit provided a much better performance than the more advanced heavy-duty model; this was strictly related to the higher sensitivity to inlet air temperature of the aero derivative unit. The comparison between the two heavy-duty GTs has clearly shown that a high specific power is needed to obtain cost-effective solutions for inlet air cooling systems. The analysis for the considered GT units was then extended also to a plant configuration including an inlet air supercharging system. The boost fan head has been selected in order to only compensate all inlet pressure losses, i.e. inlet duct, filters and air coils pressure drops.

Semi-Active Suspension Systems for Heavy-Duty Vehicles: Multibody Model Development, Identification and Control Algorithm Evaluation

2009 ◽  
Author(s):  
Matteo Grott ◽  
Francesco Biral ◽  
Roberto Oboe ◽  
Alberto Cis ◽  
Eugenio Vincenti
Keyword(s):  
New Technologies ◽  
Model Development ◽  
Cost Effective ◽  
Active Suspension ◽  
Dynamical Behaviour ◽  
Bench Test ◽  
Heavy Duty ◽  
Multibody Model ◽  
Suspension Systems ◽  
Heavy Duty Vehicles

The design of suspension systems for heavy-duty vehicles covers a specific field of automotive industry. During the past few years there has been an increasing demand in power capabilities, loads and driving speeds of heavy duty vehicles. Therefore, off-highway vehicle manufacturers have shown their interest in employing new technologies. This work focuses on the investigation of hydro-pneumatic suspension systems for heavy duty vehicles, in particular on the benefits of a semi-active solution compared to a passive one. The main targets of this activity is the study of the dynamical behaviour of agricultural tractors and the design of a cost-effective controllable suspension, capable to adapt the tractor dynamical behaviour, under different road and load conditions. The work started with the development of a multibody model of the suspension test bench to be used for control solution comparisons. The multibody model was experimentally validated by characterizing the cylinder friction, tire parameters and Frequency Response (F.R.) of the suspension bench test equipped with a passive solution. As a last step the evaluation of different control algorithms for hydraulic semi-active suspension was carried out via Adams/Matlab co-simulation technique.

scholarly journals Microstructure and Mechanical Properties of Ti-5Al-2.5Fe Alloy Produced by Powder Forging

2018 ◽  
Vol 770 ◽  
pp. 39-44 ◽  
Author(s):  
Ming Tu Jia ◽  
Clément Blanchard ◽  
Leandro Bolzoni
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Aging Treatment ◽  
Cost Effective ◽  
Vacuum Sintering ◽  
Forging Process ◽  
Blended Elemental ◽  
Cost Effective Approach ◽  
Near Net Shape

Blended elemental powder metallurgy is a cost effective approach to produce near net shape titanium alloy parts; however, the residual pores remaining in sintered parts are detrimental to the mechanical properties. In this study, elemental powders (Ti, Al and Fe) were used to produce the Ti-5Al-2Fe alloy by a powder forging process, involving cold compaction, vacuum sintering, forging and heat treatment. The residual pores of the sintered parts were removed completely by forging at the temperature of 1250oC. The effect of solution and aging and mill annealing heat treatments on the mechanical properties of the forged Ti-5Al-2Fe parts were studied. It is found that the ductility of the forged Ti-5Al-2Fe parts is improved significantly by both solution and aging treatment and mill annealing, without decreasing their ultimate tensile strength, which sits around 1000 MPa. The enhancement of the mechanical behaviour is justified via understanding the evolution of the residual porosity and of the microstructural features of the materials.

scholarly journals The Evolution of a Reliable Gas Turbine

1982 ◽  
Author(s):  
D. E. Brandt ◽  
E. J. Walsh ◽  
R. G. Kunkel
Keyword(s):  
Gas Turbine ◽  
Cost Effective ◽  
Heavy Duty ◽  
Field Validation ◽  
Heavy Duty Gas Turbine ◽  
Design Deficiencies ◽  
Turbine Design

This paper presents the evolution of a reliable and cost effective heavy duty gas turbine. Its pedigree is discussed, including the correction of deficiencies in an earlier turbine design. Specific topics addressed include the correction of field developed design deficiencies in the earlier turbine, the prototype and field validation of these earlier turbine deficiencies and the prototype and field validation of the new turbine which was scaled from the earlier design.

Variable Asymmetric Turbine for Heavy Duty Truck Engines

2013 ◽  
Author(s):  
Sebastian Schmidt ◽  
Martin G. Rose ◽  
Markus Müller ◽  
Siegfried Sumser ◽  
Elias Chebli ◽  
...  
Keyword(s):  
Fuel Consumption ◽  
High Efficiency ◽  
Cost Effective ◽  
Large Mass ◽  
Test Stand ◽  
Heavy Duty ◽  
Passenger Cars ◽  
Large Variability ◽  
Variable Turbine Geometry ◽  
Heavy Duty Truck

Turbochargers with variable turbine geometry (VGT) are established in diesel engines for passenger cars because of the beneficial effect on transient operation. The variability permits the reduction of exhaust back pressure, resulting in lower fuel consumption. There are only a few applications in heavy duty truck engines due to increased mechanical complexity and vulnerability to failure. This paper presents a turbine concept with a simple variability developed for a heavy duty engine. The variability is achieved upstream of the rotor by changing the sectional area of the volute. This can be done through a rotationally movable ring which shifts the circumferential position of the volute tongues. These separate both scrolls of a double segment turbine and can be rotated by an electric actuator. The performance maps measured at the hot gas test stand show the large variability of the flow parameter and the high efficiency levels over the operating range of the variable asymmetric turbine (VAT). The flow field is computed by the use of 3D-CFD simulations in order to analyze the loss-generating mechanisms that occur within the machine. Test runs on an engine test stand demonstrate the high potential of the concept concerning reduction of fuel consumption and a wide scope of realizable EGR rates in order to reduce NOx emissions in a cost-effective way. The resultant large mass flow variability allows the deletion of the waste gate and enables efficiency improvements.

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