Abstract
Based on the changing trend of the geometric parameters of the scroll profile of the involute of circle with variable radii, a new type of double scroll teeth profile of scroll compressor composed of involute of circle with variable radii is constructed. The construction process of the baseline is discussed, and the baseline equations are deduced. According to the principle of normal equidistance, the geometric model of variable wall thickness double scroll teeth is established, and the suction volume, tooth thickness, and scroll area of double scroll teeth are compared with those of the double scroll teeth composed of ordinary involute of circle. The results show that: compared with ordinary double scroll teeth with constant thickness, the scroll diameter when two scrolls mesh is reduced and the revolutions of orbiting scroll required in the working process are reduced and it is easy to select better scroll profile through adjusting the changing coefficient of the base circle radius k, which provides a reference for scroll machinery using environment-friendly working fluids.
Highlights
Scroll machinery is another new type of positive displacement compressor after reciprocating compressors, rotor compressors, and screw compressors
This paper analyzes the changing trend of geometric parameters of the profile and constructs a double scroll teeth profile composed of involute of circle with variable radii
As shown in Fig.3., the curve segment SCD on the baseline with the initial base circle radius of R1 can be replaced by the curve segment SAB on the baseline with the initial base circle radius of R2
Summary
Scroll machinery is another new type of positive displacement compressor after reciprocating compressors, rotor compressors, and screw compressors It is widely used in refrigeration systems and low-temperature waste heat power generation due to its simple structure, low noise, high efficiency, and light weight. Domestic and foreign scholars have done relatively little research on the double scroll teeth profile, most of which are involute of circle with the same wall thickness from start to the end. Wang Jun et al used involute of circle with variable radii and algebraic spirals to construct double scroll teeth with gradually changing wall thickness that can achieve correct meshing, and gave profile equations [4]. This paper analyzes the changing trend of geometric parameters of the profile and constructs a double scroll teeth profile composed of involute of circle with variable radii
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