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Эксплуатация и ремонт машин и оборудования
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tT
Wt
WT
tP
TP
WP tD TD WD DP t
T
W
P
D
t
T W P
D
втk
015 ,0
022 ,0
01,0
009 ,0
016 ,0
04,0
110
145
05,4
1,32 004 ,02 01,02 036 ,0
2
037 ,0
2 4
10 20 55,0 6,1 43,0 57,0
5330
1,27 ..
Determined quasi one-factor dependences of the efficiency of the К
ЭФ
. the thermal impact of
the main factors (dispersion, pressure of pressing, humidity, temperature, contact time), causing the
strength of freezing ground with metal sliding surface analysis which indicates the following: The
highest efficiency of thermal effects observed for the values of dispersion Dэ
3
3 ...5 10
mm;
with an increase in contact pressure of the thermal efficiency of exposure is reduced; with humidity
increase efficiency of thermal action increases, reaching a maximum value when humidity is close
to the boundary strength; with decreasing temperature coefficient of efficiency of the thermal ef-
fects of increases, and very intense, which can be explained by the rapid transition "connected" wa-
ter "
friable connected " and "free"; by increasing the duration of contact from 0.5 to 25 min. coeffi-
cient of efficiency increases and is stabilized with further increase contact time.
Thermal effects (T = 85°C, t
exp
. = 15s) showed a significant effect in the freezing, reducing
the strength of freezing an average of 12.5 times. An equation relating the parameters of external
factors to the strength of the soil freezing during thermal exposure, which shows that all the investi-
gated range of factors contribute to the increase of adhesion and freezing in order to increase the
degree of influence of a number of factors make up: D, t, W, T, P. it was found that the thermal im-
pact is significantly affected contact pressure.
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