Double acting hydraulic cylind
发布时间：2009-09-20 来源：扬子工具集团 浏览次数:52788Remarks：Nitrile rubber and fluorine．contained
rubber include cloth-inserted rubber．
Cushioning The cushionings shall be classified as given in Table 6
according to the locations where the cushions are to be built—in，ant．with or
without thereof．
Table 6．Cushionings
|
Locations where cushionings are to be
built．in and with or without thereof
|
Symbol
|
|
|
cushion．
|
Rod end and head end
|
B
|
|
ing
|
Rodend
|
R
|
|
Head end
|
H
|
|
|
Without cushioning
|
N
|
|
(5)—External oi—l leakages The external oil leakages shall be classifie4【into
Class A，Class B and Class C as given in Fi9．4 according to the aounts of
oil leakage from the wiper parts of the rods．
8
B 8354．1992
As regards the request for the smaller leakage than the Class A shall
be as agreed between the purchaser and supplier．
加
n3
Q2
Rod diameter d(mm)
(6)—Presence or abs—ence of switch The cylinders shall be classified as given
in Table 7 by presence or absence of the switch．
5．Performances
Table 7．Presence or absence of switch
5．1一—No load 0—peration When tested in accordance with l0．2．1，the move—
ments of the cylinder shall be smooth．
The value of the minimum operating pressure shall be not more than the
value of Table 8(A)or Table 8(B)being classified by the shapes of the packin9．
However，when the minimum operating pressure other than this value is re-
quired，its value may be determined as agreed between the purchaser and sup-
plier．
The shape of the packing shall be classified as given in Table 9．
9
E 8354．1992
Table 8(A)Minimum operating pressures for rod packings other than V—I acking
Unit：K Pa{kgf／cm2)
|
Shape of
|
Nominal
|
When pressure
|
When pressure is supplied from rod
|
||
|
piston
packing
|
pressure
(MPa)
|
is supplied from
head end
|
Rod diameter
symbolA
|
Rod diameter
symbol B
|
Rod
砖
|
|
V
|
7
|
0.5(5 J
|
0.98(10)
|
0.74(7.5J
|
0．!
|
|
14·2l
|
Nominal pres-
sure×6％
|
Nominal pres·
sure×l2％
|
Nominal pres—
sure×8.6％
|
Nomi：
SUre>
|
|
|
LoUoX
|
7
|
0.29{3)
|
0.59{6)
|
0.44【4.5)
|
0．
|
|
OoS
|
14.21
|
Nominal pres-
sure×4％
|
Nominal pres-
sure×8％
|
Nominal pres-
sure×5.7％
|
Nomi：
SUl．e≯
|
|
P
|
7
|
0.1{1 J
|
0.2{2)
|
0.15(1.5J
|
0．：
|
|
14021
|
Nominal pres-
sure×1.5％
|
Nominal pres·
sure×3％
|
Nominal pres·
sure×2.1％
|
Nomi：
8Ure>(
|
|
Table 8(B)Minimum operating pressures for rod packings of V—packing
end
|
Shape of
|
Nominal
|
When pressure
|
When pressure is supplied from rod
|
||
|
piston
packing
|
pressure
(MPa)
|
is supplied from
head end
|
Rod diameter
symbolA
|
Rod diameter
symbol B
|
Rod
sy7
|
|
V
|
7
|
0.74{7.5)
|
1.5{15)
|
1.1{11)
|
0.9
|
|
14021
|
Nominal pres-
sure×9％
|
Nominal pres·
sure×l8％
|
Nominal pres-
sure×13％
|
Nomin
8Ure×
|
|
|
L·Uox
|
7
|
0.44{4.5】
|
0.9{9】
|
0.64(6.5)
|
0.5—
|
|
OoS
|
14.21
|
Nominal pres-
sure×6％
|
Nominal pres-
sure×12％
|
Nominal pres-
sure×8.5％
|
Nomin
SUl’e×
|
|
P
|
7
|
0.15{1.5)
|
0.3(3)
|
0.2(2)
|
0.1．
|
|
14021
|
Nominal pres-
sure×2.5％
|
Nominal pres·
sure×5％
|
Nominal pres—
sure×3.5％
|
Nomin
SUl．e×
|
|
Remarks： Minimum operating pressures for piston rod symbols X，Y and Z CC譬espond
t0 1．6，1．33 and l．2 times，respectively，of minimum operating pres；1lre
when the pressure is supplied from the head end．
Table 9．Shapes of packings
|
Shape of
packing
|
V
packing
|
L(J)
packing
|
U∞
packing
|
X
rmg
|
O
rmg
|
-
．C．ombin两d
seal
|
Piston
rmg
|
|
Symb01
|
V
|
L
|
U
|
X
|
O
|
S·
|
P
|
Others
E
Remarks l．0-rings shall be in accordance、Jl，ith JIS B 2401 and V-packings sh fil be in
accordance with JIS B 2403．
2．
The combined seal means the packing which is formed by the com!dnation
of sliding rings of ethylene tetrafluoride resin or the like with rubt er
0一rings or the like．
10
B 8354．1992
5．2—Dura—bility When tested in accordance with l0．2．2，there shall be no
loosenin9，permanent deformation and abnormal wearin9，and for the cylinder
with cushionin9，the cushioning shall operate normally．
For the cylinder with switch，the switch shall not cause erroneous actions．
5．3
n0
Pressure resistance When tested{n accordance
loosenin9，permanent deformation and breakages on
with l0．2．3，there shall be
parts．
5．4．1—External 0—il leakage The external oil leakage，when tested in accordance
with l0．2．4(1)，shall be expressed by the total amount of the oil leakage from the
wiper part of the rod within l00 m in travelling distance of the piston(see Fi9．
4)．
Further，there shall be no external oil leakage from any place except the
wiper part of the rod．
、阮en tested in accordance
amount of internal oil leakage of the cylinder not using
more than the value舒yen in Table l 0。
with l0．2．4(2)，the
a piston ring shall be not
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