Study on the tooth profile for the screw claw-type pump

Hsieh, Chíu-Fan; Hwang, Yii-Wen; Fong, Zhang‐Hua

doi:10.1016/j.mechmachtheory.2007.06.011

Cited by 54 publications

(26 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Theoretical studies of claw pumps are presented in a number of works [1][2][3][4][5]. In one of the first works [1] calculation of power consumption at different inlet pressures is given.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The working process of an oil‐free claw vacuum pump

Raykov¹,

Salikeev²,

Бурмистров³

et al. 2017

Vak Forsch Prax

View full text Add to dashboard Cite

Mathematical model of oil free claw vacuum pump is presented. The model is based on energy balance differential equations of thermodynamic system of variable mass working body. Using the equations of coordinates transformation and contact line of rotors continuity condition, equations for geometry of сlaw pump working chamber on condition of rotors point connection are obtained. To evaluate the leakage through the rotor mechanism channels, their existence graphs are plotted and geometric parameters of the channels depending on rotors position are determined.As a result of modeling, dependence of pressure and temperature in suction and compression-discharge chambers on rotation angle at different rotary speeds and on different inlet pressures and relationship between pumping speed and inlet pressure are obtained.The comparison between calculated values and experimental data obtained for one-stage claw pump with identical rotors is carried out. The maximal difference between the calculated and experimental values does not exceed 15 %. The developed mathematical model is recommended for analysis of influence of rotors geometry on the working process parameters and pumping characteristics of an oil free claw pump. SUMMARY L A ∆ α δ RR δ S1 δ S2 δ RS R S FIGURE 1: Main dimensions of a claw vacuum pump.

show abstract

“…Theoretical studies of claw pumps are presented in a number of works [1][2][3][4][5]. In one of the first works [1] calculation of power consumption at different inlet pressures is given.…”

Section: Introductionmentioning

confidence: 99%

“…The model used in this work is based on differential equations describing pressure and temperature variation in the pump working volume. Drawing of claw pump rotors profile and its optimization is presented in [2]. The technique of drawing of pump geometry with identical rotors and of working chamber volume calculation is given in [3].…”

Section: Introductionmentioning

confidence: 99%

The working process of an oil‐free claw vacuum pump

Raykov¹,

Salikeev²,

Бурмистров³

et al. 2017

Vak Forsch Prax

View full text Add to dashboard Cite

show abstract

“…For another rotary positive displacement pump such as the claw vacuum pump, the related researches included Hsieh et al [17] who proposed modified designs to improve gas sealing and reduce carryover. Zhang and Fong [18] then presented the grinding method for claw screw rotors.…”

Section: Introductionmentioning

confidence: 99%

Fluid analysis of cylindrical and screw type Roots vacuum pumps

Hsieh

Zhou

2015

Vacuum

Self Cite

View full text Add to dashboard Cite

“…Allen [4] proposed a claw rotor whose profile includes a pointed tip on both sides that has a clearance particle feature and can prevent accumulation of pollutants. Hsieh [5,6] proposed a profile of claw rotor by means of the theory of gearing and the equation of undercutting, which helped to improve gas sealing and reduce carryover; and Hsieh also presented a simple mathematical model for the geometric design of a claw type rotor, using different parameters to discuss its influences on the gas port and pump performance. Giuffrida [7] presented the working principles of the claw rotor compressor and reported the formulation of volumetric efficiency; and Giuffrida [8] also proposed a rotor profile suitable for the claw-type mechanism, which seems to be preferable compared with a reference profile [7].…”

Section: Introductionmentioning

confidence: 99%