Double acting hydraulic cylind

發(fā)布時間：2009-09-20 來源：揚子工具集團瀏覽次數(shù):64756

Remarks：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
ing	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．

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

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．

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 磚
V	7	0.5(5 J	0.98(10)	0.74(7.5J	0．!
V	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．：
P	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
V	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．
P	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兩d seal	Piston rmg
Symb01	V	L	U	X	O	S·	P

Others

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．

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

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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