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Dynamic model and numerical simulation for synchronal rotary compressor / Hui Zhou in Transactions of the ASME . Journal of fluids engineering, Vol. 131 N° 4 (Avril 2009) 

Public ISBD [article]  in Transactions of the ASME . Journal of fluids engineering > Vol. 131 N° 4 (Avril 2009) . - 09 p. Titre : Dynamic model and numerical simulation for synchronal rotary compressor Type de document : texte imprimé Auteurs : Hui Zhou, Auteur ; Qu, Zongchang, Auteur ; Hua Yang, Auteur Année de publication : 2009 Article en page(s) : 09 p. Note générale : fluids engineering Langues : Anglais (eng) Mots-clés : synchronal  rotary  compressor;  key  components—cylinder;  numerical  simulation Résumé : The synchronal rotary compressor (SRC) has been developed to resolve high friction and severe wear that usually occur in conventional rotary compressors due to the high relative velocity between the key tribo-pairs. In this study, the working principle and structural characteristics of the SRC are presented first. Then, the kinematic and force models are established for the key components—cylinder, sliding vane, and rotor. The velocity, acceleration, and force equations with shaft rotation angle are derived for each component. Based on the established models, numerical simulations are performed for a SRC prototype. Moreover, experiments are conducted to verify the established models. The simulated results show that the average relative velocity between the rotor and the cylinder of the present compressor decreases by 80–82% compared with that of the conventional rotary compressors with the same size and operating parameters. Moreover, the average relative velocity between the sliding contact tribo-pairs of the SRC decreases by 93–94.3% compared with that of the conventional rotary compressors. In addition, the simulated results show that the stresses on the sliding vane are greater than those on the other components. The experimental results indicate that the wear of the side surface of the sliding vane is more severe than that of the other components. Therefore, special treatments are needed for the sliding vane in order to improve its reliability. These findings confirm that the new SRC has lower frictional losses and higher mechanical efficiency for its advanced structure and working principle. En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/issue.aspx?journalid=122 [...] [article] Dynamic model and numerical simulation for synchronal rotary compressor [texte imprimé] / Hui Zhou, Auteur ; Qu, Zongchang, Auteur ; Hua Yang, Auteur . - 2009 . - 09 p. fluids engineering Langues : Anglais (eng) in Transactions of the ASME . Journal of fluids engineering > Vol. 131 N° 4 (Avril 2009) . - 09 p. Mots-clés : synchronal  rotary  compressor;  key  components—cylinder;  numerical  simulation Résumé : The synchronal rotary compressor (SRC) has been developed to resolve high friction and severe wear that usually occur in conventional rotary compressors due to the high relative velocity between the key tribo-pairs. In this study, the working principle and structural characteristics of the SRC are presented first. Then, the kinematic and force models are established for the key components—cylinder, sliding vane, and rotor. The velocity, acceleration, and force equations with shaft rotation angle are derived for each component. Based on the established models, numerical simulations are performed for a SRC prototype. Moreover, experiments are conducted to verify the established models. The simulated results show that the average relative velocity between the rotor and the cylinder of the present compressor decreases by 80–82% compared with that of the conventional rotary compressors with the same size and operating parameters. Moreover, the average relative velocity between the sliding contact tribo-pairs of the SRC decreases by 93–94.3% compared with that of the conventional rotary compressors. In addition, the simulated results show that the stresses on the sliding vane are greater than those on the other components. The experimental results indicate that the wear of the side surface of the sliding vane is more severe than that of the other components. Therefore, special treatments are needed for the sliding vane in order to improve its reliability. These findings confirm that the new SRC has lower frictional losses and higher mechanical efficiency for its advanced structure and working principle. En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/issue.aspx?journalid=122 [...]

Frictional loss studies and experimental performance of a new synchronal rotary multiphase pump / Yang, Xu in Transactions of the ASME . Journal of fluids engineering, Vol. 133 N° 4 (Avril 2011) 

Public ISBD [article]  in Transactions of the ASME . Journal of fluids engineering > Vol. 133 N° 4 (Avril 2011) . - 09 p. Titre : Frictional loss studies and experimental performance of a new synchronal rotary multiphase pump Type de document : texte imprimé Auteurs : Yang, Xu, Auteur ; Qu, Zongchang, Auteur ; Wu, Yuyuan, Auteur Année de publication : 2011 Article en page(s) : 09 p. Note générale : Fluids engineering Langues : Anglais (eng) Mots-clés : Blades  Crude  oil  Machine  bearings  Mathematical  analysis  Prototypes  Pumps  Seals  (stoppers)  Shafts  Sliding  friction Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : A new synchronal rotary multiphase pump (SRMP) is presented, which is geometrically simple and easy to manufacture. With the rotary cylinder, the frictional losses between the major components of the SRMP are minimized. Its structural design and working principles are introduced. The mathematic models of the frictional losses at various friction-couplings are formulated. Calculations on the frictional losses and mechanical efficiency are performed for a SRMP prototype, too. Experimental works on the prototype in which crude oil is used as working fluids are conducted to validate the functionality of the SRMP and the established models. The calculated results show that the frictional losses in the SRMP are mainly produced by the friction from bearings and seals. The frictional losses caused by the other part of components occupy less than 13% of the total frictional losses. In addition, the theoretical analyses of the various shaft speeds and basic geometrical parameters reveal that the cylinder rotary inertia exercises a negative effect on the friction at the sliding vane sides. Lower shaft speed and smaller eccentricity-cylinder radius ratio are helpful to reduce this effect. In the experiment, the SRMP is operated at shaft speeds of 400, 600 and 800 rpm respectively. The pressure differences are arranged within 0–2.4MPa. The measured values of the shaft consumption powers are shown to be in good agreement with the calculations. These results confirm that the SRMP is suitable for multiphase transportation and has a higher mechanical efficiency. DEWEY : 620.1 ISSN : 0742-4795 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JFEGA400013 [...] [article] Frictional loss studies and experimental performance of a new synchronal rotary multiphase pump [texte imprimé] / Yang, Xu, Auteur ; Qu, Zongchang, Auteur ; Wu, Yuyuan, Auteur . - 2011 . - 09 p. Fluids engineering Langues : Anglais (eng) in Transactions of the ASME . Journal of fluids engineering > Vol. 133 N° 4 (Avril 2011) . - 09 p. Mots-clés : Blades  Crude  oil  Machine  bearings  Mathematical  analysis  Prototypes  Pumps  Seals  (stoppers)  Shafts  Sliding  friction Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : A new synchronal rotary multiphase pump (SRMP) is presented, which is geometrically simple and easy to manufacture. With the rotary cylinder, the frictional losses between the major components of the SRMP are minimized. Its structural design and working principles are introduced. The mathematic models of the frictional losses at various friction-couplings are formulated. Calculations on the frictional losses and mechanical efficiency are performed for a SRMP prototype, too. Experimental works on the prototype in which crude oil is used as working fluids are conducted to validate the functionality of the SRMP and the established models. The calculated results show that the frictional losses in the SRMP are mainly produced by the friction from bearings and seals. The frictional losses caused by the other part of components occupy less than 13% of the total frictional losses. In addition, the theoretical analyses of the various shaft speeds and basic geometrical parameters reveal that the cylinder rotary inertia exercises a negative effect on the friction at the sliding vane sides. Lower shaft speed and smaller eccentricity-cylinder radius ratio are helpful to reduce this effect. In the experiment, the SRMP is operated at shaft speeds of 400, 600 and 800 rpm respectively. The pressure differences are arranged within 0–2.4MPa. The measured values of the shaft consumption powers are shown to be in good agreement with the calculations. These results confirm that the SRMP is suitable for multiphase transportation and has a higher mechanical efficiency. DEWEY : 620.1 ISSN : 0742-4795 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JFEGA400013 [...]

Study on leakage via the radial clearance in a novel synchronal rotary refrigeration compressor / Hua Yang in International journal of refrigeration, Vol. 34 N° 1 (Janvier 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 1 (Janvier 2011) . - pp. 84-93 Titre : Study on leakage via the radial clearance in a novel synchronal rotary refrigeration compressor Titre original : Etude sur les fuites à travers l'espace mort dans un nouveau compresseur frigorifique rotatif synchrone Type de document : texte imprimé Auteurs : Hua Yang, Auteur ; Qu, Zongchang, Auteur ; Hui Zhou, Auteur Année de publication : 2011 Article en page(s) : pp. 84-93 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Leakage  Rotary  compressor  Loss  Refrigeration  system  Compressor  Rolling  piston Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The leakage flow characteristics at the radial clearance between the rotor and the cylinder in a novel synchronal rotary (SR) refrigeration compressor were analyzed, and the oil–refrigerant two-phase leakage flow model was established. The leakage at different temperatures caused by wall velocity and pressure difference was calculated, and their influences on the total leakage were analyzed, respectively. The calculation results indicate that the leakage of the oil–refrigerant mixture decreases firstly and then increases with the increase in the temperature. However, the refrigerant leakage always decreases when the temperature increases. Moreover, the leakage caused by wall velocity has great influence on the total leakage, especially when the radial clearance is small. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710001799 [article] Study on leakage via the radial clearance in a novel synchronal rotary refrigeration compressor = Etude sur les fuites à travers l'espace mort dans un nouveau compresseur frigorifique rotatif synchrone [texte imprimé] / Hua Yang, Auteur ; Qu, Zongchang, Auteur ; Hui Zhou, Auteur . - 2011 . - pp. 84-93. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 1 (Janvier 2011) . - pp. 84-93 Mots-clés : Leakage  Rotary  compressor  Loss  Refrigeration  system  Compressor  Rolling  piston Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : The leakage flow characteristics at the radial clearance between the rotor and the cylinder in a novel synchronal rotary (SR) refrigeration compressor were analyzed, and the oil–refrigerant two-phase leakage flow model was established. The leakage at different temperatures caused by wall velocity and pressure difference was calculated, and their influences on the total leakage were analyzed, respectively. The calculation results indicate that the leakage of the oil–refrigerant mixture decreases firstly and then increases with the increase in the temperature. However, the refrigerant leakage always decreases when the temperature increases. Moreover, the leakage caused by wall velocity has great influence on the total leakage, especially when the radial clearance is small. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710001799

Theoretical study on frictional losses of a novel automotive swing vane compressor / Xu Hu in International journal of refrigeration, Vol. 36 N° 3 (Mai 2013) 

Public ISBD [article]  in International journal of refrigeration > Vol. 36 N° 3 (Mai 2013) . - pp. 758–767 Titre : Theoretical study on frictional losses of a novel automotive swing vane compressor Titre original : Etude théorique sur les pertes dues au frottement d'un nouveau compresseur à palettes automobile Type de document : texte imprimé Auteurs : Xu Hu, Auteur ; Qu, Zongchang, Auteur ; Yang, Xu, Auteur Année de publication : 2013 Article en page(s) : pp. 758–767 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Loss;  Friction;  Automotive  compressor;  Air  conditioning Résumé : This paper introduces a novel rotary compressor named ‘Swing vane compressor’ (SVC) used for automotive air conditioning systems. By the vane structure which is similar to simple supported beam, SVC can bear higher gas working pressure and rotation speed compared to the sliding vane compressor. The paper introduces the working principle and analyzes frictional model at various contact regions. End-faces frictional losses and vane side frictional loss are the main part frictional losses in SVC. Compared to sliding vane compressor, SVC shows less frictional loss when rotation speed is less than 4000 rpm. Each frictional loss changing with rotation speed also is discussed. SVC provides a selection for automotive air conditioning systems. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700712003003 [article] Theoretical study on frictional losses of a novel automotive swing vane compressor = Etude théorique sur les pertes dues au frottement d'un nouveau compresseur à palettes automobile [texte imprimé] / Xu Hu, Auteur ; Qu, Zongchang, Auteur ; Yang, Xu, Auteur . - 2013 . - pp. 758–767. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 3 (Mai 2013) . - pp. 758–767 Mots-clés : Loss;  Friction;  Automotive  compressor;  Air  conditioning Résumé : This paper introduces a novel rotary compressor named ‘Swing vane compressor’ (SVC) used for automotive air conditioning systems. By the vane structure which is similar to simple supported beam, SVC can bear higher gas working pressure and rotation speed compared to the sliding vane compressor. The paper introduces the working principle and analyzes frictional model at various contact regions. End-faces frictional losses and vane side frictional loss are the main part frictional losses in SVC. Compared to sliding vane compressor, SVC shows less frictional loss when rotation speed is less than 4000 rpm. Each frictional loss changing with rotation speed also is discussed. SVC provides a selection for automotive air conditioning systems. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700712003003