Research on Performance of Variable-Lead Rotor Twin Screw Compressor

Abstract

Twin-screw compressors are widely used in aerodynamics, refrigeration and other fields. The screw rotors are the core component of the screw compressor and affect the performance of the compressor. This paper focuses on variable-lead rotors. A thermal process simulation model considering leakage is established to calculate the efficiency of the compressor. Different lead change methods are compared by evaluating the contact line, exhaust port and simulation results. The results show that the compressor obtains better performance when the lead decreases rapidly on the discharge side. Furthermore, the effects of the wrap angle and internal volume ratio on variable-lead rotors are studied. The work provides a reference for the design of the screw compressor rotor.

A Review of Recent Research and Application Progress in Screw Machines

“…Industrial TSCs are usually built with constant rotor lead (Figure 2a). However, nonconstant rotor lead has been proposed by some researchers for air and refrigeration TSCs, and was treated as a very potential technology for providing a larger discharge area and thus the higher isentropic efficiency by theoretical analysis [33][34][35][36][37], but the processing is still a difficulty. Non-constant rotor lead can be classified into two types: multiple lead (Figure 2b) and continuously variable lead (Figure 2c).…”

Modelling and motion characteristics of a new multistage lead screw telescopic mechanism

“…Lu Kaiyuan, Wu Weimin [1] proposed a novel electromagnetic lead screw for wave energy applications; KK Varanasi, SA Nayfeh [2] develop a model of lead-screw system dynamics; W Zhang, X Zhang, et al [3] studied the machine tool with both ends fixed ball screw; Fengqing Tian, Jianmin Zhu, et al [4] analyzed screw feed drive system; Shen Xin, Zheng Zhi et al [5] optimized the screw parameters; Wu Honghui, Liu Jianke et al [6] studied variable-lead rotor and established thermal process simulation model considering leakage; Cao Lin, Wu Jianjun et al [7] established a precise friction torque model based on double-nut 2-point contact ball screws; Blanchet TA. [8] modeled an elastic screw body; Li Y, Zhang L et al [9] simulated the forming process of lead screw high-speed cold roll-beating; Vahid-Araghi O, Golnaraghi F. [10] designed a sliding mode controller; Meruva K, Bi Z, Mueller D, et al [11] modeled and validated the wear and fatigue life of a lead screw actuator; Wu DS, Lai HY, et al [12] presented a systematic modelling procedure for producing high precision elliptic helicoid screw transmission systems; Ma S, Zhang T, Liu G, et al [13] developed an analytical model of the planetary roller screw mechanism; Lai HY, Chen CK, et al [14] presented a new circular helicoidal surface meshing model for producing high transmission performance lead screws; Liu Y, Feng X, et al [15] studied the transmission performance of micro-nano feed system of hydraulic screw; Jintanawan, T., et al [16,17] used MATLAB/Simulink to study the dynamic model of the lead screw; Hojjat, Y. and M.M.…”