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):67072This Japanese Industrial Standard specifies the double acting hydraulic cylinders，hereafter referred to as the”cylinders”，to be used in the hydre-ulic systems(2)for mechanical equipment(1)．2．JIS Notes(1)Those which are used in production such as manufacturir g and assemblin9．
(2)Those which are prescribed in JIS B 8361．
Remarks l．
2．
Definitions
B 0142 apply，
The units and numerical values given in()in this E tands，rd
are based on the traditional units and are appended for
informative reference．
The standards cited in this Standard are shown in／．ttached
Table 2，and corre8ponding International Standards are
shown in Attached Table 3．
For the main terms used in this Standard，the defini；ions in
and the rest of the terms shall be as follows：
Informative reference：The definitions for terms are given in IS0 5 598．
(1) maximum permissible working pressure The maximum value pe】missible
for pressure generated inside the cylinder．
Remarks：This means such pressures as internal pressure，which．results
from the absorption of energy when inertial loads are．topped，
and surge pressure．which is generated when the direc：ion of oil
flow is changed．
(2)—nominal—pressure The pressure assigned for the purpose of cony(nient
designation，and the maximum value of the set pressures for reliev ng valves
provided in an oil hydraulic circuit using cylinders．
minimum operating pressure．The minimum pressure capable of，,uaran-
teeing the opera,on of the cylinder．
(4)—head—end Closed end of the cylinder．
(5)—rod—end End of a cylinder through which the piston rod passes．
Informative reference：
Head end Rod end
2
B 8354．1992
where，
A theoretical fluid force acting on the surface of a piston．
E^=0．1×P X A
慨JI=P X A)
EJl： cylinder force(kN){kgfl
P： nominal pressure acting on the surface of
the piston(MPa){kgf／cm2)
A： effective cross-sectional area of the piston
(cm2)
A mechanical force transmitted by a piston rod．
(8)—thrust efficien—cy of cylinder The ratio of the cylinder output force to the
cylinder force．
where，
thrust efficiency of cylinder
cylinder output force(kN){kgf}
nominal working pressure acting on the
surface of a piston(MPa){kgf／cm2)
A： effective cross·sectional area of the piston
(cm2) ．
．c．．．y．．．．．1．．i．．．n．．．．．d．．．．．e．．．．r．．．．．．c．．．．u．．．．．s．．．h．．．．．i．．．o．．．．n．．．．．i．．．n．．．—9— Means whereby the movement of a rod is decelerated
as it approaches the end of its stroke by restricting the discharge of fluid
automatically．
3一—Surrou—ndings The cylinders shall be used in indoor surroundings and
shall not be used in the surroundings of excessive vibration，contamination，and
high humidity．
3．2 Ambient temperature The ambient temperature shall be一5。C t0 80。C．
3．3 Working fluid The working fluid used shall be mineral working oil．
The piston speeds shall be as given in Table l．
Table l．Piston speeds
|
Tube bores IIIIIl
|
Piston speed mm／s
|
|
32 40 50 63
|
8 t0 400
|
|
80 100 125
|
8t0300
|
|
140 160 180
200 220 250
|
8t0200
|
shall be not more than the values shown in Figs．1，2 and 3．
B 8354．1992
3．6 Maximum permissible working pressures The maximum permissible
working pressures for cylinders shall be classified as given in Table 2．
Table 2．Maximum permissible working pressures
Unit：MPa{kgf／cm2)
|
|
|
Rod end
|
||
|
Nominal pressure
|
Head end
|
Red diameter
symbolA
|
Rod diameter
SymbolB
|
Rod diameter
symbol C
|
|
7(70l
|
8.8{90】
|
14.7{150)
|
12.7{130)
|
10.8{110)
|
|
14 f140】
|
17.7(180】
|
17.7 f180】
|
17.7 f180l
|
13.7(140】
|
|
21{210)
|
26.5{270)
|
26.5{270l
|
24.5{250l
|
|
4．Types The types of the cylinders shall be classified as given in the
following according to nominal pressures，mounting forms，materials of packing
and gasket，cushionings，external leakages(1eakages from rod wiper portion)，and
with or without switches．
(1) Nominal pressure The cylinders shall be classified as given in Table 3
according to the nominal pressures：
Table 3．Nominal pressures of cylinder
Unit：MPa
Nominal pressure
7{70)
14(140l
21 1210l
(2) Mounting forms The cylinders shall be classified as given in Table 4
according to the mounting forms：
Table 4．Mounting forms
|
|
Mounting type
|
Symbol
|
Remarks
|
|
|
|
Right-angled to axis foot type
|
LA
|
(MS 2)
|
Tables l9＆20
|
|
Foot types
|
Axial direction foot type
|
LB
|
(MS l)
|
Table21
|
|
|
Rod-end rectangular flange type
|
FA
|
(MF l)
|
Tables 22,23＆24
|
|
Head-end rectangular flange type
|
FB
|
(MF 2)
|
Tables22,23＆24
|
|
|
Flange types
|
ROd-end square flange type
|
FC
|
(MF 5)
|
Table25
|
|
Head-end square flange type
|
FD
|
(M田6)
|
Table25
|
|
|
|
Detachable eye type
|
CA
|
(MP4)
|
Table 26
|
|
Crevice
|
Detachable crevice type
|
CB
|
(M：P2)
|
Table 26
|
|
types
|
Fixed eye type
|
CC
|
(MP3)
|
Table 27
|
|
|
Rod-end integral trunnion type
|
TA
|
(MT l)
|
Table 28
|
|
Trunnion
|
Head·end integral trunnion type
|
TB
|
(MT 2)
|
Table 28
|
|
types
|
Intermediate fixed trunnion type
|
TC
|
(MT4)
|
Tables 29＆30
|
7
E 8354．1992
Remarks l．Those of which mounting methods are inevitably particular ones shall be
designated as X-shape，such as LX，F(xiàn)X and the like．
2．
The fixed eye form in the crevice types shall mean an integrated construc-
tion in which an eye fitting is welded with the head，and the deb tchable
eye form and detachable crevice form shall mean those construct ion in
which eyes and crevice fittings have been assembled with bodies by tie
rods．
3．The symbols given in()are shown for informative reference，al．d are in
accordance with JIS B 8366．
(3) Materials of packing and gasket
as given in Table 5 according to
Packings and gaskets shall be(1assified
materials．
Table 5．Materials of packing and gasket
|
Material of packing and gasket
|
Symbol
|
|
Nitrile rubber
|
l
|
|
Urethane rubber
|
2
|
|
Fluorine。contained rubber
|
3
|
|
Ethylene tetrafluoride resin
|
4
|
|
Metal ．
|
5
|
|
Others
|
6
|
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