OBRABOTKAMETALLOV MATERIAL SCIENCE Том 23 № 3 2021 EQUIPMEN . INSTRUM TS Vol. 7 No. 1 2025 Ta b l e 1 Options for investigating pressure angles No. Phase angles Values of maximum pressure angles, degrees φ, degrees (suction) φ, degrees (injection) 1 200 160 32 2 220 140 33 3 240 120 32 4 260 100 31 5 280 80 25 the follower and, consequently, lead to a decrease in power consumption. Using the calculation algorithms shown in Figs. 4, 5, and 8, and setting the phase angles for suction and injection in 20° increments, we obtained values for the pressure angles. One calculation option is presented below. Option 1. The phase angle for the injection and suction moment is 180°. The graphs for this option are shown in Fig. 9. Fig. 9. Graph of pressure angle variations As can be seen from the graph, the pressure angle values at 70° and 310° exceed acceptable limits. Therefore, this option is not viable for the homogenizer design. Subsequently, five more options were proposed (Table 1). Of the family of curves presented in Table 1, only one satisfies the requirement: the pressure angles throughout a full rotation (360°) do not exceed the permissible value of 30°. This curve has phase angles of 280° for the injection period and 80° for the suction period. Subsequently, using these parameters as a basis, we initiated the cam synthesis. For preliminary calculations during synthesis, the following cycle diagram parameters were used: 80° was allocated for suction, and 280° of the full cam rotation was allocated for liquid injection. Formula (5) was used to determine the torque on the cam. The numerical values of the forces at the injection and suction moments were assumed to be F1 = 12,315 N and F2 = 2,500 N, respectively. For one variant, graphs of the torques at phase displacement angles ψ1 = 170° and ψ2 = 340° are shown in Fig. 10. The total torque acting on the drive shaft is indicated in purple. The data for the remaining options are summarized in Table 2. Only Option 5 (also depicted in Fig. 10) exhibits the lowest total torque value on the camshaft, as evident from the table above. Following a thorough analysis of the available options, the cam mechanism synthesis can begin with the following specifications: 280° and 80° for injection and suction, based on the cycle diagram; a pusher stroke of 30 mm; and a minimum curvature radius of 90 mm.
RkJQdWJsaXNoZXIy MTk0ODM1