On the basis of the existing research, there are still many works to be further improved and upgraded. In particular, further research can be carried out from the following aspects: (1) Design different gating system of valve body, and determine the optimal gating system of valve body through simulation...
1.Simulation results and analysis of filling process The filling process of multi way valve casting is as shown in the figure. It can be seen from the figure that when the liquid metal just enters the cavity, i.e. before 5.5s, the filling is not stable, resulting in splashing and...
The hydraulic valve is an essential component in the hydraulic system. The performance of the hydraulic valve determines the performance of the whole hydraulic system. As the main part of the hydraulic valve, the valve body casting bears the high pressure load, and is also affected by the temperature...
1.Casting system model of double hydraulic valve body The design method of the valve body gating system is similar to that of a hydraulic valve body. The gating system uses two internal sprues to introduce the liquid metal into the casting cavity. Finally, it is calculated that the cross-sectional...
Taking the simplified one hydraulic valve body and the two multi way valve body for loader as the research object, the position and size of the defects in the casting process of the valve body were simulated and analyzed, and the strength of the hydraulic valve body with casting...
The drawing shows the shrinkage pore distribution of a series of hydraulic valves made of steel-304 stainless steel with casting temperature of 1700C. It can be seen from the drawing that the maximum porosity is 75.8%. By contrast, when the casting material is nodular cast iron QT500-7, the volume...
The figure shows the maximum porosity of a hydraulic valve body with cast material of QT500-7 as a function of pouring temperature. It can be seen from the figure that the maximum porosity is the smallest when pouring temperature is 1360 C, with a value of 0.634. When temperature...
Data transfer in the process of fluid-solid coupling (FSI) calculation is to transfer the simulation results of flow field (pressure, temperature) to the solid part through the interface and calculate the stress and strain of solid structure under pressure and temperature. 1 Grid Division Patch Independent method is used...
1. Simulation Model Fig. 1(a) shows the connection of each spool in the right position of the bucket union valve. The opening of the spool is 9.5mm. Pro/E is used to establish a three-dimensional model of the spool when it is working in the right position (bucket up-rotation condition).It...
The figure shows the integral multi-way valve used in the loader. Besides the main valve body, it also includes two main spools and several auxiliary elements, which control the working circuit of the boom lifting hydraulic cylinder and the bucket hydraulic cylinder.It can be seen from the diagram that...