Mechanical Separation Phenomena in Picking Mechanisms of Fly-Shuttle Looms

1976 ◽  
Vol 98 (3) ◽  
pp. 835-839 ◽  
Author(s):  
F. D. Hart ◽  
B. M. Patel ◽  
J. R. Bailey
Keyword(s):  
Mathematical Model ◽  
Dynamic Response ◽  
Operating Conditions ◽  
Equivalent Stiffness ◽  
Noise Emission ◽  
System Parameters ◽  
Response Characteristics ◽  
Cam Follower ◽  
Mechanical Separation ◽  
Dynamic Response Characteristics

Mechanical separation between cam and pick ball in fly-shuttle looms gives rise to impact and vibration which causes significant noise emission. Elimination of separation is analyzed using a mathematical model which simulates the dynamic response characteristics of the system. Parameters considered in the study include equivalent stiffness, mass, and damping of the system, amplitude of excitation, effect of preload provided by a retaining spring, and operating frequency. Combinations of system parameters and operating conditions which give rise to separation are predicted by examining the contact force developed between cam and cam-follower. Equations and graphs are presented that specify the preload required to eliminate separation as a function of the system parameters.

Dynamic Coupling Effects in Rotary Face Seal Separation Phenomena

1967 ◽  
Vol 89 (2) ◽  
pp. 296-300 ◽  
Author(s):  
F. D. Hart ◽  
C. F. Zorowski
Keyword(s):  
Surface Friction ◽  
Operating Conditions ◽  
Contact Friction ◽  
Dynamic Coupling ◽  
Continuous Contact ◽  
System Parameters ◽  
Response Characteristics ◽  
Contact Force Distribution ◽  
Mechanical Separation ◽  
System Variables

Dynamic separation phenomena in spring-supported rotary face seals are studied, employing a mathematical model which simulates the dynamic response characteristics of the system. Parameters considered in the model include support resilience, amplitude of shaft pulsation and mating ring wobble, initial preset, operating frequency, and contact surface friction. Inclusion of contact friction necessitates consideration of dynamic coupling in the equations governing the motion of the seal carrier. Combinations of operating conditions and system variables which produce incipient mechanical separation are predicted by examining the behavior of the contact force distribution between the seal and mating ring. Equations and graphs are presented which specify the theoretical preset required to maintain continuous contact as a function of the system parameters considered in the analysis.

scholarly journals Dynamic Response Characteristics Analysis and Energy, Exergy, and Economic (3E) Evaluation of Dual Loop Organic Rankine Cycle (DORC) for CNG Engine Waste Heat Recovery

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6224
Author(s):  
Baofeng Yao ◽  
Xu Ping ◽  
Hongguang Zhang
Keyword(s):  
Heat Source ◽  
Dynamic Response ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Operating Conditions ◽  
Response Characteristics ◽  
Characteristics Analysis ◽  
Cng Engine ◽  
Dynamic Response Characteristics

Frequent fluctuations of CNG engine operating conditions make the waste heat source have uncertain, nonlinear, and strong coupling characteristics. These characteristics are not conducive to the efficient recovery of the DORC system. The systematic evaluation of the CNG engine waste heat source and the comprehensive performance of the DORC system is conducive to the efficient use of waste heat. Based on the theory of internal combustion (IC) engine thermal balance, this paper analyzes the dynamic characteristics of compressed natural gas (CNG) engine waste heat energy under full operating conditions. Then, based on the operating characteristics of the dual loop organic Rankine cycle (DORC) system, thermodynamic models, heat transfer models, and economic models are constructed. The dynamic response characteristics analysis and energy, exergy, and economic (3E) evaluation of the DORC system under full operating conditions are carried out. The results show that the maximum values of net power output, heat exchange area, and the minimum values of EPC (electricity production cost) and PBT (payback time) are all obtained under rated condition, which are 174.03 kW, 25.86 kW, 37.54 kW, 24.76 m2, 0.15 $/kW·h and 3.46 years. Therefore, the rated condition is a relatively ideal design operating point for the DORC system. The research in this paper not only provides a reliable reference for the comprehensive analysis and evaluation of the performance of the DORC system, but also provides useful guidance for the selection of appropriate DORC system design operating points.

Intracellular Dynamic Response Characteristics of Pineal Photoreceptors

1984 ◽  
Vol 16 (1-2) ◽  
pp. 119-122
Author(s):  
Y. Morit ◽  
K. Segi ◽  
M. Samejima ◽  
T. Nakamura
Keyword(s):  
Dynamic Response ◽  
Response Characteristics ◽  
Dynamic Response Characteristics ◽  
Pineal Photoreceptors ◽  
Intracellular Dynamic

Dynamic response characteristics of the plynlimon catchments and preliminary analysis of relationships to physical descriptors

1995 ◽  
Vol 6 (5) ◽  
pp. 465-472 ◽  
Author(s):  
C. E. M. Sefton ◽  
P. G. Whitehead ◽  
A. Eatherall ◽  
I. G. Littlewood ◽  
A. J. Jakeman
Keyword(s):  
Dynamic Response ◽  
Preliminary Analysis ◽  
Response Characteristics ◽  
Dynamic Response Characteristics

Dynamics Analysis of Refrigeration Compressor Based on Finite Element and Experimental Modes

2012 ◽  
Vol 499 ◽  
pp. 238-242
Author(s):  
Li Zhang ◽  
Hong Wu ◽  
Yan Jue Gong ◽  
Shuo Zhang
Keyword(s):  
Finite Element ◽  
Dynamic Response ◽  
Modal Analysis ◽  
Natural Frequency ◽  
High Precision ◽  
3D Model ◽  
Finite Element Models ◽  
Dynamics Analysis ◽  
Response Characteristics ◽  
Dynamic Response Characteristics

Based on the 3D model of refrigeration's compressor by Pro/E software, the analyses of theoretical and experimental mode are carried out in this paper. The results show that the finite element models of compressor have high precision dynamic response characteristics and the natural frequency of the compressor, based on experimental modal analysis, can be accurately obtained, which will contribute to further dynamic designs of mechanical structures.

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