ISO 3857-2-1977 Compressors pneumatic tools and machines Vocabulary Part II Compressors Bilingual edition《压缩机、风动工具和风动机械 词汇 第2部分 压缩机 两种语言版》.pdf
《ISO 3857-2-1977 Compressors pneumatic tools and machines Vocabulary Part II Compressors Bilingual edition《压缩机、风动工具和风动机械 词汇 第2部分 压缩机 两种语言版》.pdf》由会员分享,可在线阅读,更多相关《ISO 3857-2-1977 Compressors pneumatic tools and machines Vocabulary Part II Compressors Bilingual edition《压缩机、风动工具和风动机械 词汇 第2部分 压缩机 两种语言版》.pdf(7页珍藏版)》请在麦多课文档分享上搜索。
1、INTERNATIONA! STAMMilD, NORMEINTERNATIONALE 385711 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION l MEXjlYHAPO,JIHAR OPrAHWJALWl II0 CWH - isentropic (reversible adiabatic), i.e. assuming a compression with constant entropy; - polytropic, i.e. assuming a reversible compression following a curve as c
2、lose as possible to the true curve. - isentropique (rkversible adiabatique), ce qui suppose une compression sous entropie constante; - polytropique, ce qui suppose une compression r&ersible suivant une courbe aussi proche que possible de la courbe r6elle. 5.1 theoretical required power : In a compre
3、ssor without losses, power which is theoretically required to compress a gas according to the chosen reference process, from a given inlet pressure to a given discharge pressure. 5.1 puissance absorbee thkorique : Dans un compresseur exempt de pertes, puissance qui est theoriquement nkcessaire pour
4、comprimer un gaz suivant I&olution r6versible de reference choisie, depuis une pression daspiration donnbe jusqud une pression de refoulement don&e. 5.2 indicated power : Power corresponding to the pressure-volume diagram recorded by means of an indicator. 5.2 puissance indiquee : Puissance correspo
5、ndant au diagramme pression-volume relev6 au moyen dun indicateur. 5.3 internal power. The indicated power to which are added the losses due to heat transmission and leaks. 5.3 puissance interne : Puissance indiqu6e 8 laquelle on ajoute les pertes par transmission de chaleur et les pertes dues aux f
6、uites. 3 IS0 3857/l I -1977 (E/F) 5.4 shaft power : Power required on the compressor driving shaft, It is obtained by adding the mechanical losses to the internal power. The losses in external transmissions such as gear drives or belt drives are not included. 6 SPECIFIC ENERGY REQUIREMENT 6.1 theore
7、tical specific energy requirement : The work necessary to compress a unit mass of gas (mass specific energy) or unit volume of gas) (volume specific energy) according to the chosen reference process (isothermal, isentropic, polytropic)*). 6.2 actual specific energy requirement : The shaft input ener
8、gy per unit of compressor actual rate of flow. 7 EFFICIENCIES 7.1 theoretical efficiency : The ratio of the theoretical required power to the indicated power. According to the chosen reversible reference process, the theoretical efficiency may be polytropic, isentropic or isothermal. 7.2 internal ef
9、ficiency : The ratio of the theoretical required power to the internal power. 7.3 mechanical efficiency : The ratio of the internal power to the shaft power. 7.4 overall efficiency : The ratio of the theoretical required power to the shaft power. 7.5 volumetric efficiency : The ratio of the actual v
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