DEVELOPMENT OF A METHOD FOR SELECTING THE SHAPE OF THE LOAD CHARACTERISTIC THE ADAPTIVE FRICTION CLUTCH WITH A SEPARATE POWER CIRCUIT

2020 ◽  
Author(s):  
D.A. Ramazanov ◽  
Keyword(s):  
Total Mass ◽  
Load Capacity ◽  
Power Circuit ◽  
Load Characteristic ◽  
Design Version ◽  
Friction Clutch ◽  
Load Characteristics ◽  
Nominal Load

The main provisions of the method for selecting the form of the load characteristic of the AFM with a separate power circuit are formulated. The method involves taking into account the nominal load, the total mass of the drive, the value of the gain of the adaptive friction clutch with a separate power circuit and the accuracy of its operation, as well as recommendations for the choice of the second design version of the clutch. The choice of the type of adaptive friction clutch, taking into account the load characteristics, is based on the different load capacity and accuracy of operation, which correspond to these forms.

Calculation and design of adaptive friction second-generation couplings (first version)

2020 ◽  
Author(s):  
M.P. Shishkarev ◽  
Keyword(s):  
Second Generation ◽  
Load Capacity ◽  
Control Device ◽  
Load Characteristic ◽  
Friction Clutch ◽  
Nominal Load ◽  
Clutch Control

The method of calculating an adaptive friction clutch with a separate power closure (the first option) is given.The features of calculating the values of the clutch control device parameters to ensure the highest accuracy of operation at a given nominal load capacity are shown. Explanations are given when calculating the values of the control device parameters depending on the shape of the load characteristic of the coupling.

THE IMPLEMENTATION OF THE PRINCIPLE OF SEPARATION OF POWER CIRCUIT IN THE ADAPTIVE FRICTION CLUTCHES

2020 ◽  
Author(s):  
V. E Zinoviev ◽  
Keyword(s):  
Friction Coefficient ◽  
Feedback Gain ◽  
Power Circuit ◽  
Load Characteristic ◽  
The Third ◽  
Force Closure ◽  
Friction Clutch

For the third variant of the adaptive friction clutch with a separate force closure, the boundaries of the change in the value of the feedback gain are determined, within which the clutch has the highest accuracy of operation, if its load characteristic is realized in the form of a curve monotonically increasing in the range of the friction coefficient values. A variant of separate power closure is developed, which provides for the introduction of an additional spring into the clutch design in the closure node of the thorn pairs of the main friction group.

SELECTION OF THE SHAPE OF THE LOAD CHARACTERISTICS OF ADAPTIVE FRICTION COUPLINGS WITH SEPARATE POWER CLOSURE

2020 ◽  
Author(s):  
D. A. Ramazanov ◽  
Keyword(s):  
Maximum Point ◽  
Boundary Values ◽  
Power Circuit ◽  
Machine Drive ◽  
Operational Characteristics ◽  
Friction Clutch ◽  
The Coefficient Of Friction ◽  
Load Characteristics ◽  
Range Of Values ◽  
Selection Of

It is established that in practice it is possible to use adaptive friction clutches of the second generation with a separate power circuit, having two different forms of load characteristics: in the form of a curve monotonically increasing in the range of values of the coefficient of friction; in the form of a curve having a maximum point within the specified interval, excluding its boundary values. It is shown that the choice of the type of adaptive friction clutch and its technical and operational characteristics are mainly influenced by the value of the nominal torque and the specified maximum mass of the drive. Three main requirements for adaptive friction clutches operating as part of the machine drive are formulated.

TECHNOLOGICAL APPLICATIONS OF ADAPTIVE FRICTION CLUTCHES

2020 ◽  
Author(s):  
N.V. Moiseeva ◽  
Keyword(s):  
Load Capacity ◽  
Kinematic Chain ◽  
Loading Capacity ◽  
Appropriate Use ◽  
Friction Clutch ◽  
Nominal Load ◽  
Executive Body

It is shown that the largest part of the existing adaptive friction clutches is suitable for use only in light and medium-loaded drives of machines, and their smallest part can be used in drives of machines operating at highly stabilized load on the Executive body. It is proven that short drives with a single-threaded kinematic chain it is advisable to use the adaptive friction clutch having relatively low accuracy and limited nominal loading capacity, in drives with long single-threaded kinematic chain, appropriate use of adaptive friction couplings with relatively low accuracy and with a higher nominal load capacity.

An Analysis on the Forming Load of AA 2024 Aluminium Alloy in Combined and Sequence Operation Process

2006 ◽  
Vol 519-521 ◽  
pp. 949-954 ◽  
Author(s):  
Beong Bok Hwang ◽  
J.H. Shim ◽  
Jung Min Seo ◽  
H.S. Koo ◽  
J.H. Ok ◽  
...  
Keyword(s):  
Finite Element ◽  
Load Capacity ◽  
Low Cost ◽  
Forming Load ◽  
Mechanical Press ◽  
Combined Operation ◽  
Aa 2024 ◽  
Load Characteristics ◽  
Simulation Results ◽  
Selection Of

This paper is concerned with the analysis of the forming load characteristics of a forward-backward can extrusion in both combined and sequence operation. A commercially available finite element program, which is coded in the rigid-plastic finite element method, has been employed to investigate the forming load characteristics. AA 2024 aluminum alloy is selected as a model material. The analysis in the present study is extended to the selection of press frame capacity for producing efficiently final product at low cost. The possible extrusion processes to shape a forward-backward can component with different outer diameters are categorized to estimate quantitatively the force requirement for forming forward-backward can part, forming energy, and maximum pressure exerted on the die-material interfaces, respectively. The categorized processes are composed of combined and/or some basic extrusion processes such as sequence operation. Based on the simulation results about forming load characteristics, the frame capacity of a mechanical press of crank-drive type suitable for a selected process could be determined along with securing the load capacity and with considering productivity. In addition, it is suggested that different load capacities be selected for different dimensions of a part such as wall thickness in forward direction and etc. It is concluded quantitatively from the simulation results that the combined operation is superior to sequence operation in terms of relatively low forming load and thus it leads to low cost for forming equipments. However, it is also known from the simulation results that the precise control of dimensional accuracy is not so easy in combined operation. The results in this paper could be a good reference for analysis of forming process for complex parts and selection of proper frame capacity of a mechanical press to achieve low production cost and thus high productivity.

Study of Destabilization Mechanism of Concrete Component Based on Catastrophe Theory

2011 ◽  
Vol 413 ◽  
pp. 499-506
Author(s):  
Yan Fen Liao ◽  
Yan Xu ◽  
Xiao Qian Ma
Keyword(s):  
Brittle Failure ◽  
Mechanical Model ◽  
Stability Problem ◽  
Load Capacity ◽  
Spring Stiffness ◽  
State Variables ◽  
Temperature Load ◽  
Load Characteristics ◽  
Concrete Component ◽  
Simplified Mechanical Model

A simplified mechanical model in view of concrete component stability problem on fire was established. Assuming the temperature of fire and load as control variables, and material strain (or intensity) as state variables, destabilization mechanism of concrete component under high temperatures was carried out with the application of cusp catastrophic model. And the nonlinear mutation characteristics and failure mechanism of concrete component on fire were investigated. The results indicate that system's catastrophe characteristic is determined by fire duration, temperature, load capacity and load characteristics. When K=-F'(u)/km>1, component destructs in the form of ductility failure, and when K<1, component destructs in the form of brittle failure. As the temperature rises, the caper value increases if the spring stiffness is defined.

A Classification of Power Load Based on the Load Characteristic in Distribution Networks

2013 ◽  
Vol 427-429 ◽  
pp. 1132-1135
Author(s):  
Jian Peng Li ◽  
Song Zhang ◽  
Yuan Yuan Shan ◽  
Yi Nong Li ◽  
Feng Qing Jiang
Keyword(s):  
Low Voltage ◽  
Distribution Networks ◽  
Load Curve ◽  
Load Characteristic ◽  
Power Load ◽  
Load Characteristics ◽  
Load Types ◽  
Daily Load

Nowadays the widest used classification of power load is based on the industry they belonged to, but, as low voltage loads are varietal, even the loads in the same industry can be considerably different in load characteristics of them. In this paper, power loads are classified according to three load characteristic indicators: load averages, load changing cycle and the peak-valley ratio, which are based on the typical daily load curve of them. In this method, the typical daily load curves of loads in the same type are relatively more similar, which is in favor of further study using daily load curve. In this paper, thousands of 10kV loads in shanghai have been classified into 8 types in the method, and the analysis of the load types have been presented.

Analysis of the Nominal Load Effects on Gear Load Capacity Using the Finite-Element Method

2010 ◽  
Vol 224 (11) ◽  
pp. 2539-2548 ◽  
Author(s):  
I Atanasovska ◽  
R Mitrović ◽  
D Momĉilović ◽  
A Subic
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Significant Influence ◽  
Load Distribution ◽  
Load Capacity ◽  
The Finite Element Method ◽  
Gear Teeth ◽  
Load Effects ◽  
Nominal Load ◽  
Element Method

This research investigates the effects of the nominal load value on load distribution of simultaneously meshing gear teeth pairs, and on the involute gear load capacity. The research results presented in this article confirm that the nominal load value has a significant influence on the gear load capacity calculations. However, this influence is generally neglected in standard gear calculations, which can result in oversized gear dimensions. This can lead to inadequate gear designs in practice due to increased demand for reduced gear size and weight in modern machinery. The article provides a detailed description of the iterative numerical method developed in this research to support the modelling and analysis of load distribution in meshed gears using the finite-element method.

BASICS OF SEPARATE POWER CIRCUIT IN ADAPTIVE FRICTION CLUTCHES OF THE SECOND GENERATION

2020 ◽  
Author(s):  
V. E. Zinoviev ◽  
Keyword(s):  
Mathematical Model ◽  
Mathematical Models ◽  
Second Generation ◽  
Schematic Diagram ◽  
Power Circuit ◽  
Operational Characteristics ◽  
Friction Clutch

The generalized schematic diagram and mathematical model of the adaptive friction clutch of the second generation with a separate power circuit, designed for the use of technical and operational characteristics, are synthesized. Three variants of the circuit of separate power circuit in the coupling are established and their mathematical models are developed. The limits of maximum values of parameters allowing to optimize accuracy of operation of the coupling are established.

The Application of Finite Element Methods to Study Force Transducer Anti-Deviated Load Characteristics

2011 ◽  
Vol 138-139 ◽  
pp. 168-174
Author(s):  
Kuen Chang Hsieh ◽  
Kuen Tsann Chen ◽  
Choatponag Kanjanaphachoat ◽  
Ching Wen Yeh ◽  
Yu Yawn Chen
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Finite Element Methods ◽  
Cross Validation ◽  
Load Capacity ◽  
Force Transducer ◽  
Torsional Stiffness ◽  
Finite Element Models ◽  
Force Transducers ◽  
Load Characteristics

In this study, a finite element method was used to study force transducer anti-deviated load characteristics. Through the changes produced by different sizes of force transducer finite element models, modal analyses in linear static analyses of different biased loadings were applied to perform cross-validation. The results indicate that force transducers with same strain output but with high torsional stiffness have better anti-deviated load capacity. Increasing the torsional stiffness of the force transducer could reduce the loss of precision due to biased loading.

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