Dynamic analysis of the moving mechanism of the reciprocating compressor with clearance joints

Abstract

The clearance faults on joint of moving mechanism are most common in a reciprocating compressor. In order to investigate the relationship between the clearance faults and the dynamic behavior of the moving mechanism, a dynamic model with clearances of a reciprocating compressor is built via software ADAMS. We take into the clearance size and clearance number into consideration and set clearance fault on the joint between the crank and connecting rod, the joint between connecting rod and crosshead and both joints of connecting rod, exploring the effect of these factor on the dynamic response. Then we make a non-linear analysis to estimate the chaos behavior. In the end, we conclude that the clearance size and the number of clearance both strongly influence the dynamic behaviors of the moving mechanism, so do the position where clearance fault happens. As the clearance size increases or the number of clearance fault increase, the acceleration will oscillate more violent and have higher amplitude, furthermore, it is more possible to show chaotic behaviors.

‘URS Campestre’ seedless orange: a new mutant with female sterility

“…v.74, n.5, p.371-377, September/October 2017 male gametophytic sterility derives from failure of embryo sac development either because of senescence of the megaspore mother cells or because of embryo sac formation in the early stages of meiotic division, i. e., before the formation of megaspores which inhibit the production of seeds in fruit (Hodgson, 1967). Xiao et al (2007) and Zhou et al (2011) identified degeneration in tangerines of the embryo sac mother cells (viable megaspores) leading to their sterility and subsequent seedlessness.…”

“…Nonetheless, in a number of fruit species included in the Citrus genus, seedless fruit production (parthenocarpy) in the absence of fertilization, or as a result of embryo abortion, could occur (Koltunow, 1993;Vardi et al, 2008;Ye et al, 2009). In citrus species, different factors are associated with parthenocarpy such as polyploidy (Chen et al, 2004), male sterility (Hu et al, 2007;Yamamoto and Tominaga, 2002), self-incompatibility (Yamamoto and Tominaga, 2002;Ye et al, 2009;Zhang et al, 2012), abortion of ovule or embryo sac (Xiao et al, 2007;Zhou et al, 2011), adverse climatic factors including extreme, and both low and high temperatures (Hedhly, 2011;Thakur et al, 2010) in addition to hormone application (Talon et al, 1992) and neutron irradiation, 'x' or gamma rays (Bermejo et al, 2011;Vardi et al, 2008) , all of which could promote seedless fruit production.…”

Investigation for synchronization characteristics of double cam vibrating screen

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