無油渦旋壓縮機關(guān)鍵技術(shù)研究
[Abstract]:Scroll compressor has the characteristics of stable operation, compact structure, low noise, high working efficiency and so on. Compared with other forms of compressor, scroll compressor has incomparable advantages in many aspects. With the increasing attention to environmental pollution in the world, oil-free scroll compressors have gradually become the focus of compressor industry. At present, all the oil-free scroll compressors change the oil-lubricated bearings into self-lubricating bearings, and apply a layer of self-lubricating material to the surface of the anti-rotation device and the moving scroll disk and the contact surface of the frame by coating technology. So researchers at home and abroad focus on the life of self-lubricating materials and the heating of oil-free scroll compressors. Maglev technology has the advantages of no contact, no friction, no lubrication and so on. It can be used in oil-free scroll compressor to solve the problems existing in traditional equipment. According to the characteristics of compact structure and simple control system of magnetic drive technology, a new type of oil-free scroll compressor, magnetic drive oil-free scroll compressor, is proposed, and the design idea and working principle of the new type of scroll compressor are explained. Based on the study of the theoretical formulas of the parameters of the scroll compressor and the magnetic characteristics, the different profile schemes of the new compressor are optimized, and the compression line under the scheme is modified. According to the parameter analysis and calculation of the back pressure and driving force needed by the new compressor, the magnetic circuit and magnetic force of different size back pressure elements and different types of driving elements are studied by using finite element software, and the most suitable components are selected. Because the force of the moving vortex disk is the relationship between the force and the rotation angle, and the driving force is the relationship between the force and the air gap, the theoretical formula of the relationship between the force and the air gap of the moving vortex disk is derived by the induction formula. The magnetic force of the new compressor driving element is checked by the theoretical formula, and it is shown that the radial force has little influence on the design of the scroll compression driving element. In order to reduce the vibration of the moving vortex disk, the sixth order constrained modal analysis of the moving vortex disk is carried out. The control part of the new compressor is to build the dynamic model of the new compressor through the differential mathematical model of electromagnet and the mathematical model of compressor compression resistance, and to establish the state space equation. The linear correlation of observable matrix is obtained, and it is concluded that the system is controllable observable system. The response characteristics and displacement characteristics of the state space equation of the system are simulated and analyzed by using numerical analysis software, and the optimal control points of the control system are found out by using LQR control strategy. The necessity of simulation of displacement characteristics of a new type of oil-free scroll compressor is also explained. According to the heavy task and lack of visual design tool in the research and development process of scroll compressor, the auxiliary design software of magnetic driven oil-free scroll compressor is developed, and the architecture design and work flow of the software are explained. Some programs running in the background of the software are introduced in detail, and the application method and function of the software are explained, which provides a reference for the design and research of magnetic driven oil-free scroll compressor or scroll compression.
【學(xué)位授予單位】:沈陽工業(yè)大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TH45
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