GJ972256 墙壁喷涂装置 US 5230608[专,英]/(Januska chades F).—1993.7.27.—(1992.2.13);Int.Cl.F 04 B 49/02介绍向墙壁表面喷涂半液体状条形涂料的手动装置。装置包括安装涂料池的轮架,它下部装着螺旋泵,泵轴由电机驱动,装置自动...GJ972256 墙壁喷涂装置 US 5230608[专,英]/(Januska chades F).—1993.7.27.—(1992.2.13);Int.Cl.F 04 B 49/02介绍向墙壁表面喷涂半液体状条形涂料的手动装置。装置包括安装涂料池的轮架,它下部装着螺旋泵,泵轴由电机驱动,装置自动保持规定压力。例如68.6N/cm^2。系统向墙壁表面压出条形涂料。详细介绍并有图表明装置和它的工作。图4GJ972257 用于喷射混凝土灰浆的无压缩机的脉冲装置 SU 2046907[专,俄]/—1995.10.27.—(1993.9.30):Int.Cl.E 04 F展开更多
Starting from the classical centrifugal compressor, cone shaped in meridional cross section, two modifications are considered on the basis of results from 2D and 3D flow models. The first modification is the change of...Starting from the classical centrifugal compressor, cone shaped in meridional cross section, two modifications are considered on the basis of results from 2D and 3D flow models. The first modification is the change of the meridional cross section to hyperbolically shaped channel. The second modification, proposed on the basis of 2D axisymmetric solution, concerns the shape of blading. On the strength of this solution the blades are formed as 3D shaped blades, coinciding with the recent tendency in 3D designs. Two aims were considered for the change of meridional compressor shape. The first was to remove the separation zone which appears as the flow turns from axial to radial direction. The second aim is to uniformize the flow at exit of impeller. These two goals were considered within the frame of 2D axisymmetric model. Replacing the cone shaped compressor by a hyperbolically shaped one, the separation at the corner was removed. The disc and shroud shape of the compressor was chosen in the way which satisfies the condition of most uniform flow at the compressor exit. The uniformity of exit flow from the rotor can be considered as the factor which influences the performance of the diffuser following the rotor. In the 2D model a family of stream surfaces of S1 type is given in order to find S2 surfaces which may be identified with the midblade surfaces of compressor blading. A computation of 3D type has been performed in order to establish the relations between 2D and 3D models in the calculation of flow parameters. In the presented example the 2D model appears as the inverse model which leads to 3D shape of blading whereas the 3D model has been used for the direct solution. In the presented example the confrontation of two models, 2D and 3D, leads to a better understanding of the application of these models to the design procedure.展开更多
文摘GJ972256 墙壁喷涂装置 US 5230608[专,英]/(Januska chades F).—1993.7.27.—(1992.2.13);Int.Cl.F 04 B 49/02介绍向墙壁表面喷涂半液体状条形涂料的手动装置。装置包括安装涂料池的轮架,它下部装着螺旋泵,泵轴由电机驱动,装置自动保持规定压力。例如68.6N/cm^2。系统向墙壁表面压出条形涂料。详细介绍并有图表明装置和它的工作。图4GJ972257 用于喷射混凝土灰浆的无压缩机的脉冲装置 SU 2046907[专,俄]/—1995.10.27.—(1993.9.30):Int.Cl.E 04 F
文摘Starting from the classical centrifugal compressor, cone shaped in meridional cross section, two modifications are considered on the basis of results from 2D and 3D flow models. The first modification is the change of the meridional cross section to hyperbolically shaped channel. The second modification, proposed on the basis of 2D axisymmetric solution, concerns the shape of blading. On the strength of this solution the blades are formed as 3D shaped blades, coinciding with the recent tendency in 3D designs. Two aims were considered for the change of meridional compressor shape. The first was to remove the separation zone which appears as the flow turns from axial to radial direction. The second aim is to uniformize the flow at exit of impeller. These two goals were considered within the frame of 2D axisymmetric model. Replacing the cone shaped compressor by a hyperbolically shaped one, the separation at the corner was removed. The disc and shroud shape of the compressor was chosen in the way which satisfies the condition of most uniform flow at the compressor exit. The uniformity of exit flow from the rotor can be considered as the factor which influences the performance of the diffuser following the rotor. In the 2D model a family of stream surfaces of S1 type is given in order to find S2 surfaces which may be identified with the midblade surfaces of compressor blading. A computation of 3D type has been performed in order to establish the relations between 2D and 3D models in the calculation of flow parameters. In the presented example the 2D model appears as the inverse model which leads to 3D shape of blading whereas the 3D model has been used for the direct solution. In the presented example the confrontation of two models, 2D and 3D, leads to a better understanding of the application of these models to the design procedure.
