scholarly journals Research on Multiple-Split Load Sharing Characteristics of 2-Stage External Meshing Star Gear System in Consideration of Displacement Compatibility

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Shuai Mo ◽  
Shuai Ma ◽  
Guoguang Jin ◽  
Yidu Zhang ◽  
Chao Lv ◽  
...  
Keyword(s):  
Gear Tooth ◽  
Characteristic Curve ◽  
Load Sharing ◽  
Two Stage ◽  
Pitch Error ◽  
Design And Manufacturing ◽  
Stage System ◽  
Thickness Error ◽  
Planetary Transmission ◽  
And Control

This paper studies the multiple-split load sharing mechanism of gears in two-stage external meshing planetary transmission system of aeroengine. According to the eccentric error, gear tooth thickness error, pitch error, installation error, and bearing manufacturing error, we performed the meshing error analysis of equivalent angles, respectively, and we also considered the floating meshing error caused by the variation of the meshing backlash, which is from the floating of all gears at the same time. Finally, we obtained the comprehensive angle meshing error of the two-stage meshing line, established a refined mathematical computational model of 2-stage external 3-split loading sharing coefficient in consideration of displacement compatibility, got the regular curves of the load sharing coefficient and load sharing characteristic curve of full floating multiple-split and multiple-stage system, and took the variation law of the floating track and the floating quantity of the center wheel. These provide a scientific theory to determine the load sharing coefficient, reasonable load distribution, and control tolerances in aviation design and manufacturing.

The anaerobic treatment of a ligno-cellulosic substrate offering little natural pH buffering capacity

1998 ◽  
Vol 38 (4-5) ◽  
pp. 29-35 ◽  
Author(s):  
C. J. Banks ◽  
P. N. Humphreys
Keyword(s):  
Ph Control ◽  
Anaerobic Treatment ◽  
Buffering Capacity ◽  
Single Stage ◽  
Stable Operation ◽  
Reactor Performance ◽  
Two Stage ◽  
Ph Buffering ◽  
Stage System ◽  
The Stability

The stability and operational performance of single stage digestion with and without liquor recycle and two stage digestion were assessed using a mixture of paper and wood as the digestion substrate. Attempts to maintain stable digestion in both single stage reactors were unsuccessful due to the inherently low natural buffering capacity exhibited; this resulted in a rapid souring of the reactor due to unbuffered volatile fatty acid (VFA) accumulation. The use of lime to control pH was unsatisfactory due to interference with the carbonate/bicarbonate equilibrium resulting in wide oscillations in the control parameter. The two stage system overcame the pH stability problems allowing stable operation for a period of 200 days without any requirement for pH control; this was attributed to the rapid flushing of VFA from the first stage reactor into the second stage, where efficient conversion to methane was established. Reactor performance was judged to be satisfactory with the breakdown of 53% of influent volatile solids. It was concluded that the reactor configuration of the two stage system offers the potential for the treatment of cellulosic wastes with a sub-optimal carbon to nitrogen ratio for conventional digestion.

Two-stage system for robust neutral/lombard speech recognition

2007 ◽  
Author(s):  
Hynek Bořil ◽  
Petr Fousek ◽  
Harald Höge
Keyword(s):  
Speech Recognition ◽  
Two Stage ◽  
Stage System

Modeling, Design and Control of a Solar Array Simulator Based on Two-Stage Converters

2017 ◽  
Vol 28 (5) ◽  
pp. 585-596 ◽  
Author(s):  
Allan Fagner Cupertino ◽  
Heverton Augusto Pereira ◽  
Victor Flores Mendes
Keyword(s):  
Solar Array ◽  
Two Stage ◽  
And Control

Innovation comprehensive solutions for off-gases cleaning in steel industry. Technical solutions for dusty gas flows cleaning

2021 ◽  
Vol 77 (5) ◽  
pp. 593-601
Author(s):  
D. A. Serebryanskii ◽  
M. N. Korolev ◽  
M. V. Antonov ◽  
I. O. Tyapkova
Keyword(s):  
Raw Materials ◽  
Gas Flows ◽  
Two Stage ◽  
Gas Cleaning ◽  
Hard Particles ◽  
Centrifugal Filter ◽  
Maximum Permissible Concentrations ◽  
Pneumatic Transportation ◽  
Stage System ◽  
Technical Solutions

Metallurgical production associates with such processes as crushing, drying and pneumatic transportation of raw materials, roasting, melting etc., in the process of which hard particles and harmful gaseous components are emitted into atmosphere. At pneumatic transportation of raw materials and sand, their concentration in the atmosphere as a rule exceeds maximum permissible concentrations. Existing facilities of dusty flows cleaning in some cases don’t ensure sanitary norms ГН 2.1.6.3492‒17. Technical solutions  proposed  to  clean  gases  in  a  centrifugal  filter,  a  facility  of  complex  gas  cleaning – cyclo-filter and two-stage  system  of high-concentrated gas-dust flows cleaning. Description of the centrifugal filter, cyclo-filter, two-stage facility of gas cleaning design presented. The facility comprises centrifugal filter and ceramic pulse filter. Industrial tests of the centrifugal filter ЦФ2-6-1 under conditions of a system of pneumatic transportation of sand established, that efficiency of gas-dust flows cleaning of sand particles in a  six-channel  filter  can  reach 98.65%.  Application of  two-stage  system  of  gas  cleaning  comprising  centrifugal  filter  and  ceramic pulse filter ФКИ enables to reach residual hard particles concentration at the exit of such a facility of 5 mg/m3, having initial dust level of 127878 mg/m3. Application of such a complex two-stage cleaning facility allows to reach values of 0.1 of maximum permissible concentrations near the source of emissions.

Basic Simulation Study during the Process of Designing the Hybrid Power Train Equipped with Planetary Transmission

2013 ◽  
pp. 322-356
Keyword(s):  
Control Strategy ◽  
Electricity Consumption ◽  
System Optimization ◽  
Minimal Energy ◽  
Simulation Research ◽  
Power Train ◽  
Hybrid Power ◽  
Driving Cycles ◽  
Planetary Transmission ◽  
And Control

Chapter 9 is devoted to simulation research showing the influence of changes of the power train’s parameters and control strategy on the vehicle’s energy consumption, depending on different driving conditions. The control strategy role is to manage how much energy, frankly speaking, how much of the torque-speed relations referring to the power alteration, are flowing to or from each component. In this way, the components of the hybrid power train have to be integrated with a control strategy, and of course, with its energetic parameters to achieve the optimal design for a given set of constraints. The hybrid power train is very complex and non-linear to its every component. One effective method of system optimization is numerical computation, the simulation, as in the case of the multivalent suboptimal procedure regarding the number of electrical mechanical drive’s elements, whose simultaneous operation is connected with the proper energy flow control. The minimization of a power train’s internal losses is the target. The quality factor is minimal energy, as well as minimal fuel and electricity consumption. The fuel consumption by the hybrid power train has to be considered in relation to the conventional propelled vehicle. First of all, the commonly chosen statistic driving cycles should be taken into consideration. Unfortunately, this is not enough. The additional tests as for the vehicle’s climbing, acceleration, and power train behavior, referring to real driving situations, are strongly recommended during the drive design process.

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