Optimization of radial flexible mechanism in scroll compressor based on oil film lubrication analysis

Abstract

Purpose The leakage problem caused by machining error, assembly error, wearing and thermal deformation has been the main factor hindering the development of scroll compressor. This paper aims to investigate the lubrication characteristics of radial clearance and further optimize the radial clearance, which can reduce the leakage in the tangential direction of the working chamber. Design/methodology/approach This paper establishes a model of radial clearance oil film lubrication in scroll compressor. And, the method to solve the Reynolds and energy equations is presented, as well as the dimensionless and discretization by finite element difference method. To verify the established model, performance experiment of scroll compressor for electric vehicle air conditioning system is also carried out. Findings Based on the presented model, the temperature field and distribution of the oil film in the radial clearance are analyzed. And the influence of the structural parameter on the radial clearance is further discussed. The optimum radial clearance could be achieved at β = 40°–42°, where the orbiting scroll is in the state of rotary balance. And, the simulation results coincide well with the experimental results. Originality/value This work provides an effective model to evaluate the lubrication characteristics of radial clearance in scroll compressor, which can provide guidance for the design of scroll compressor.

Key Technologies and Application of Electric Scroll Compressors: A Review

“…Radial and tangential leakages occur in each compression chamber, which are the main contributors to the overall leakage and have a significant impact on the cooling capacity and power consumption of the scroll compressor. In their study, Sun et al [59] focused on modeling radial gap lubrication to optimize the radial flexible mechanisms in the scroll compressor of the HPAC system for EVs. The researchers conducted performance test experiments and discovered that the swing phase angle of the flexible mechanism β should be set between 40 • and 42 • for achieving optimal clearance and rotational equilibrium of the orbiting scroll disk.…”

Optimization of Vehicle Engineering Control Based on Improved Simulated Annealing Algorithm

“…According to the research situation of parameter matching optimization of pure electric vehicle transmission system at home and abroad, as well as the different degree of demand for economy and power performance during vehicle development, it can be roughly divided into the following three categories: the matching design with the power performance of the vehicle as the optimization goal; The matching design is based on the economic efficiency of the vehicle. The matching design takes the economy and power performance of the vehicle as the dual optimization objective [8][9]. In the parameter matching and optimization of the electric vehicle transmission system, the economy or power performance of the electric vehicle is generally taken as the optimization objective function or constraint condition, and then appropriate optimization algorithms are selected to optimize the relevant parameters of the transmission system [10].…”