JIS-B-0905-1992-R2007-ENG.pdf
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1、J I S Brno905 92 = 4933608 0530352 612 JIS JAPANESE INDUSTRIAL STANDARD Rotating machines - Balance quality requirements of rigid rotors Translated and Published bY Japanese Standards Association UDC 62-1 3162-755 Printed in Japan 9 s Copyright Japanese Standards Association Provided by IHS under li
2、cense with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 01:13:29 MDTNo reproduction or networking permitted without license from IHS -,-,- JIS BU0905 92 M 4933608 0530353 559 In the event of any doubt arising, the original Standard in Japanese is to be final aut
3、hority. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 01:13:29 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*0705 92 m Y933608 0530354 475 m a a a a JA
4、PANESE INDUSTRIAL STANDARD Rotating machines - Balance quality requirements of rigid rotors UDC 62-13:62-755 J I S B 0905-1992 1 . Scope This Japanese Industrial Standard specifies the methods of expressing balance qualities when rotors are balanced as rigid rotors (hereafter referred to as the “bal
5、ance qualities of rotating machines“) and the grades thereof, methods for determining corresponding permissible residual unbalances and allocating methods, as well as the treatments relating to the balancing of keys. Remarks 1 . 2 . 3. The rotors mean the rotating substances of which journals are be
6、ing supported by bearings, and the rigid rotors mean the rotors of which axial loads do not exceed permissible values due to the deformations of the rotors, even though these are balanced in two planes selected arbitrarily and are rotated under the similar supporting conditions to the time of use at
7、 an arbitrary speed of not larger than the maximum speed of rotation (See JIS B 0 1 5 3 ) . For rotors other than the rigid rotors, in the case where these are subjected to balancing as rigid rotors, this Standard may be applicable. The equivalent International Standards to this Standard are as give
8、n in the following: IS0 1940-1:1986 Mechanical vibration - Balance quality requirements of rigid rotors - Part 1 : Determination of permissible residual unbalance IS0 8821: 1989 Mechanical vibration - Balancing - Shaft and fitment key convention 2. Definitions For the purpose of this Standard, the f
9、ollowing definitions apply (See JIS B 0153). (1) unbalance The condition of mass distribution of a rotor which originates vibratory forces or motions in bearings as the results of centrifugal forces. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employee
10、s/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 01:13:29 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*0905 92 M 4933b08 0530355 321 2 B 0905-1992 Remarks 1 . This is sometimes used as the synonym of the amount of unbalance or unbalance vector. 2. The u
11、nbalance of a rigid rotor may generally result in the following types. (a) The static unbalance or couple unbalance expressed by the three vectors on three planes defined arbitrary. (b) The dynamic unbalance expressed by the two unbalance vectors on two planes defined arbitrary. residual unbalance A
12、n unbalance remaining after balancing. specific unbalance unbalance divided by the mass of the rotor. deviation of the center of mass of the rotor from the center line of the shaft. In a rigid rotor, a quotient of the static This is equal to the balance quality A quantity indicating the degree of ba
13、lance of a rigid rotor, and it is the product of the specific unbalance and a certain specified angular velocity (See 3 . 1 ) . permissible residual unbalance maximum residual unbalance. However, if it is not confusing, it may also be called the permissible unbalance. The amount of the permissible p
14、ermissible residual specific unbalance permissible residual unbalance divided by the mass of the rotor. However, if it is not confusing, it may also be called the permissible specific unbalance. A quotient of the balancing An operation to adjust the mass distribution of a rotor, so that the vibratio
15、n and force sychronous with the rotational speed which are imparted to the bearings are within the specified limits. single-plane balancing In a rigid rotor, the balancing procedure by which the residual static unbalance is allowed to be in a certain limit by adjusting the mass di.stribution. two-pl
16、ane balancing In a rigid rotor, the balancing procedure by which the residual dynamic unbalance is allowed to be in a certain limit by adjusting the mass distribution. correction plane line of the shaft in which the correction of unbalance is performed. In a rotor, a plane perpendicular to the cente
17、r full key shaft having a keyway with the part to be attached or the key equal to this, and it is the name of the key to be used Corresponding to the half key, when it is used in balancing procedure. The key to be used in the final assembling of the rotating Copyright Japanese Standards Association
18、Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/16/2007 01:13:29 MDTNo reproduction or networking permitted without license from IHS -,-,- JIS BX0905 92 m Y933608 051035b 2bB m Balance quality grade Upper limit value of balance quality 3
19、B 0905-1992 60.4 61 62.5 66.3 616 640 6100 G250 G630 G1600 64000 0.4 1 2.5 6 . 3 16 40 100 250 630 1600 4000 I (12) half key The key to be used when a rotating shaft or a part to be attached having a keyway is to be balanced each in a single piece. Its unbalance is equivalent to the unbalance of the
20、 portion of the key to be used in the final assembling being inserted into the keyway of the rotating shaft or the part to be attached (See Fig. 6 ) . 3 . Balance qualities 3.1 Expression of balance quality The balance quality shall be expressed by the product (mm/s) of the amount of specific unbala
21、nce e (mm) and the maximum service angular velocity o (rad/s) of a rotor See formula (1) 1 Balance quality = QU (i) In addition, if rotational speed n(min-l) is used instead of o, the balance quality may also be expressed as formula (2). en Balance quality = 5.3% (2) 3 . 2 Balance quality grades The
22、 balance quality grades and the upper limit values corresponding to those shall be in accordance with Table 1 . Table 1 . Balance quality grades Unit: mm/s Remarks: Each balance quality grade 6 includes the range of balance qualities from the numerical value of the upper limit of the designated bala
23、nce quality to zero. 3 . 3 Recommended values of balance qualities for various rotating machines The recommended balance quality grades relating to various rotating machines are exemplified in Inf ormatiGe reference Attached Table 1 . Furthermore, this Ihformative reference Attached Table 1 is given
24、 for reference only, and whichever grade is to be applied to each rotor shall be as agreed between the parties concerned. 4 . Determination of Dermissibe residual unbalance The relationship between the permissible residual specific unbalance ewr ( u m ) , and the service speed of rotation n(min-l),
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