Research on the angle of dewing and exhaust angle of symmetric arc plus straight-line scroll compressor. Wu Hao, Liu Xiangnong, Wang Tiejun and Liu Zhengshi (HeFei University of Technology, School of mechanical and automotive engineering, Hefei 230009) are quite different. For these two cases, the spindle rotation angle is not completely and clearly explained, which leads to large errors when calculating the volume of each compressor chamber of scroll compressor. In this regard, the study adopts symmetrical circular arc plus line scroll compressor scroll end line geometry that defines the meshing angle and actual exhaust angle, clarifies the distinctions between the two, deduced the meshing angle formula and analyzed the influence factors and meshing angle, and according to the scroll at the beginning the increase in wall thickness caused by the essential characteristics of the modified compression chamber volume reduction center, provides a modified vortex plate end capacity calculation method and actual exhaust angle of the wall thickness increases. The conclusion is verified that the difference between the rodent angle and the actual exhaust angle is quite different through the calculation example. It is pointed out that the actual exhaust angle will affect the design of the exhaust hole.
For the closed scroll compressor open type scroll compressor and electric automobile air conditioning of the traditional automobile air conditioner with symmetrical circular arc plus line (EA-SAL) of the scroll beginning is modified, increasing the exhaust angle, improves the compressor volume ratio and compression ratio, improve the vortex plate end cutting force characteristics, to meet the special requirements limit condition, automotive air conditioning refrigerant requirements and installation space. The exhaust process of symmetric arc plus straight-line scroll compressor, especially the determination of exhaust angle, is especially important in the design and correction of scroll compressor. Scroll compressor air conditioning compressor foreign automobile manufacturer in Japan and three main Denso are producing this kind of tooth shape, but the relevant research results so far have not been published. The domestic scholars have also studied the exhaust process and the exhaust angle of the modified type scroll compressor. Liu Tao and so on analyzed the starting exhaust angle of the double arc correction. Gao Xiufeng simply analyzes the scroll compressor with exhaust valve exhaust angle, and pointed out that the beginning of the modified eddy volume formula is complex; in calculating the displacement of the compressor, the exhaust process is divided into stages involute and modified part meshing phase. Jin Linfang and so on, through studying the exhaust process of the corrected line compressor, put forward the principles that should be followed in the design of the exhaust port, and pointed out that the size of the exhaust angle should be corrected in the current thermodynamic and dynamic calculation. In the symmetrical circular arc plus line in the exhaust angle angle equal to the spindle turning action vortex plate mutual meshing, which cannot reflect the true exhaust condition, produce large errors in the calculation result of the compression chamber volume; especially relates to a central compression chamber volume calculation method, which is related to the symmetric arc line the modified line scroll compressor meshing angle and discharge angle of 2 meshing angle of 2.1 spindle rotation bookmark2 will dynamic vortex plate relative static vortex plate 180 degrees when installing shaft angle is defined as 0=0, i.e. the static and dynamic vortex substrate circle line and the positive X axis angle of 0, then the dynamic vortex plate in the translation base circle around the static vortex substrate circle turning angle for shaft angle is 0, as shown in.
Dynamic analysis and calculation of scroll compressor. Here it analyzes the symmetrical circular arc plus line profiles for scroll compressor scroll end geometry characteristic, strictly distinguish the angle formed around the compression chamber when the spindle center spindle turning angle and the compressor exhaust, defines the meshing angle and actual exhaust angle, with derived meshing angle formula, factors analysis of the impact of meshing angle. In view of the essential characteristics of the corrected central compression chamber volume reduction due to the increase of the wall thickness at the beginning of the vortex disk, a method for calculating the volume of the initial wall thickness after the correction of the vortex disk is put forward, so as to calculate the volume of the central compression chamber and the actual exhaust angle. These are very important to accurately calculate the volume of the compressed cavity, especially the volume of the central compression cavity, the dynamic analysis and the design and calculation.
1 symmetrical arc plus straight-line correction parameters. As shown, the scroll body adopts involute line. The basic geometric parameters are as follows: the radius of the base circle is Rb, the pitch of the turbo disk is eight, the wall thickness of the scroll plate is (the starting angle of the involute is the involute angle). Scroll beginning with symmetrical circular arc plus line, D points to the correction angle for heart modified arc and scroll involute inner intersection, 6 points for the connection of circular and scroll involute outer wall node, for correction and modification of straight line, arc and arc has 5 M and N respectively tangent to the point. Connect the radius of R, modified arc radius is 2'and several modified arc center base circle tangent C distance for eliminating the 2.2 meshing angle in circular arc plus line method, general secondary compression cavity and the center chamber, the rotation angle is defined as the discharge angle. In fact, since the end of compression within the volume is relatively small, the pressure ratio is small, has not yet reached the external pressure ratio (car air conditioning conditions, external pressure ratio close to 6, and it was found that the pressure ratio is only 34, obviously, although the time between) compression cavity and the center cavity have been connected, but not the refrigerant the gas discharge, if this shaft angle is defined as the discharge angle, it can not reflect the real condition of the internal exhaust scroll compressor, so this definition is not reasonable. A secondary compression chamber and the compression chamber communicated with the center shaft angle is defined as the meshing angle, and the provisions of the vortex outermost closed shaft angle is 0=0, this is not easy to calculate the compression chamber volume. When the central compression chamber is connected with the secondary compression chamber, the instantaneous scroll plate and the straight part of the static scroll plate will move away from each other when they move to each other.