JIS-B-8340-1976-R1984-ENG.pdf
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1、- ! J I S B*340 7b 4733b08 0022LOO b ei I p l 1 - J.IS UDC 621.515.001.4 +621.635.091,4 - i JAPANESE I NDUSTRIAL STANDARD Testing Methods for Turbo- Blowers and Compressors JIS -B 8 3 4 0 - 1 9 7 6 Translated and Published Japanese Standards Association 18 S Printed in Japan Copyright Japanese Stand
2、ards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 19:57:08 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S BW340 76 m 4933k08 0022LOL 8 m , Translation without guarantee i n the event
3、 of any doubt arising, the original standard in Japanese is to be evidence . Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 19:57:08 MDTNo reproduction or networking permitted without lice
4、nse from IHS -,-,- UDC 621.515.001.4+ 621.635.DO1.4 JAPANESE INDUSTRIAL. STANDARD J I S Testing Met hods for Turbo- Blowers B 8340-1976 and Compressors (Reaffirmed: 1979) i. .Scope This Japanese Industrial Standard specifies the testing and inspecting methods on the turbo-blowers( ) and compressors
5、hereinafter referred to as the tkom- pressors“, of pressure ratio of approximately 1.1 or over, to be carried out at factories using air of ordinary temperature and ordinary pressure, In the case of tests and inspections on the compressors to be used under special conditions or using special gas, th
6、is standard is applicable , as agreed between the parties concerned , properly selecting and complementing this standard. Note, ( l) Remark: Including those of centrifugal, mixed and axial flow. The units and numerical values given in 1 in this standard are in accordance with the International Syste
7、m of Units (SI) , and are appended for reference. e e Applicable Standards: JIS B 0601-Surface Roughness JIS B 8330-Testing Methods for Turbo-Fans and Blowers JIS C 1502-Sound Level Meters JIS Z 8731-Methods for Measurement of Sound Level JIS Z 8762-Measurement of Fluid Flow by Means of Orifice Plat
8、es and Nozzles J1S.Z 8763-Measurement of Fluid Flow by Means of Venturi Tubes Reference Standard: JIS B 8341-Testing Methods for Displacement Compressors Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale
9、, 03/13/2007 19:57:08 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 B 8340-1976 2. Definitions For the purposes of this standard, the following definitions apply: (1) conditional formula of air The conditional formula which is given in the follow in g formula : Referenc
10、e: In the case of an adiabatic change, the following relation is given furthermore. (2) p,k= constant .,i,.i.,.i.,.i.iii.I. I.,.) where P : absolute pressure of air (kgf/m2 abs) = p4+P Pa P. : atmospheric pressure (kgP/m2 abs) Pa P : gauge pressure of air (kgf/m2) Pa) T : absolute temperature of air
11、 (K) = 273 + t t : air temperature (“cl v : specific volume of air at P .and T (m3/kgf) m3/kg) 29.27 1-0.3789 1 , P R : gas constant of air = _ - k : adiabatic exponent of air where P, : saturated vapour pressure Pal (kgf /m2) 9 : relational temperature (decimal) The value of gas constant R of air u
12、nder standard suction conditions is considered to be 29.44, and the value of adiabatic exponent .k is considered to be 1.4. These values may be applied to the atmosphere of temperature -15 to 4OOC. (2) standard suction condition The suction condition in the case where the compressor draws in humid a
13、ir of 20% in temperature, 760 mmHg in absolute pressure and 65 % in relative humidity. Remark: The weight per unit volume of air under the standard suction conditions is considered to be 1.20 kgffdensity 1.20 kg/m3). (3) pressure of air Unless particularly stated, a static pressure of air (gauge pre
14、ssure). Remark: The static pressure is a pressure which is imparted on the surface of a wail in parallel with the flow, and is measured through a hole bored vertically to its surface. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, Us
15、er=Wing, Bernie Not for Resale, 03/13/2007 19:57:08 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S Bk8340 76 -473.3608 0022304 3 i _ - _ _ _ _ 3 B 8340-1976 (4) capacity of compressor An air volume calculated from the test which has been converted into the standard s
16、uction conditions Remark: In the case where particularly stated, it is expressed by con- verting into the volume at the specified conditions. Furthermore, in this standard, in the case where any gas other than air Is treated, it is also called as the air -capacity. . (5) specified number of revoluti
17、ons of compressor Number of revolutions ber- unit time of a cornmessor shaft when it has been driven under the Specified power sourc condition in the case of electric motor driving, and under the specified driving condition in the case of the other prime mover, Remark: Because this number of revolut
18、ions differs to some extent accord- ing to air volume of compressor, if it is required to indicate its numerical value, a number of revolutions of a compressor at the specified capacity is employed representatively . e . (6) shaft power of compressor An input to the shaft end of the compressor. - Re
19、mark: In the case where the compressor is driven using transmission gear, if it is difficult to measure the loss of power in the transmission gear, an imput to the transmission gear is considered to be the shaft power of the compressor. (7) noise of compressor A noise level in surroundings of the co
20、mpressor body during running. 3, Tests and Inspection Items 3.1 Test Items The test items shall be as follows: Temperature, pressure, suction air volume, number of revolutions, shaft power, noise, running condition 3.2 Inspection Items The inspection items shall be as follows: Discharge pressure and
21、 air volume, shaft power, overall adiabatic efficiency and overall isothermal efficiency, noise, running condition Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 19:57:08 MDTNo reproductio
22、n or networking permitted without license from IHS -,-,- I J I S B*8340 76.- 46133608 0022305 5 ; 4 B- 8340- 1976 4. Test Conditions ; j 4 . . 1 Test Number of Revolutions of Air Compressor The test of compressor.s shall be carried out at the specified number of revolutions, and its method shall be
23、in accordance with 4.3 (1) to (5). However, in the. case where it is difficult to run the compressor at the specified number of revolutions, due to reasons of power source, fadities and the like, it shall be run at 4 20 % of the specified number,of revolutions for a single-stage. However, it may be
24、reduced to -35 % according to agreement in the case of the single-stage. For a multi-stage,.it may be tested at a number of revolutions in a range of 4 5 %. Irrespective of the single-stage or multi-stage, if it is impossible to carry out testing due to large scale or large power, model test shall b
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