Selection Of Hydraulic Valve Installation Method
The correct choice of hydraulic valve
For any hydraulic system, the correct choice of hydraulic valve, will make the hydraulic system design is reasonable, excellent performance, easy installation, easy maintenance, while ensuring the normal operation of the system an important condition. Here from several aspects to explain how to choose a reasonable hydraulic valve.
1. The general principle of choice
First of all, according to the functional requirements of the system to determine the type of hydraulic valve. Should try to select the standard series of generic products. Depending on the actual installation, choose a different connection, such as tube or plate connection. Then, according to the system design of the maximum working pressure to select the rated pressure of the hydraulic valve, according to the maximum flow through the hydraulic valve to select the hydraulic valve flow specifications. If the relief valve should be selected according to the maximum flow rate of the hydraulic pump, the flow valve should be selected according to the flow rate controlled by the loop. The minimum steady flow should be less than the minimum steady flow required by the speed range.
2. Selection of hydraulic valve installation method
Hydraulic valve installation of the hydraulic device structure has a decisive impact, so according to the specific circumstances to choose the appropriate installation. In general, in the choice of hydraulic valve installation method, should be selected according to the size of the hydraulic valve, the system complexity and layout characteristics to set. Threaded connection, suitable for the system is relatively simple, fewer components, the installation location is more spacious occasions. Plate connection type, suitable for the system more complex, more components, the installation location is more compact occasions. The connection plate can be drilled to communicate the oil circuit, the number of hydraulic components installed in the connection plate, can reduce the connection between the hydraulic valve, reduce the leakage point, making installation and maintenance more convenient. Flange connection type is generally used for large diameter valves.
3. Selection of rated pressure of hydraulic valve
The rated pressure of the hydraulic valve is the basic performance parameters of the hydraulic valve, marking the hydraulic pressure bearing capacity of the size, refers to the hydraulic valve in the rated working state of the nominal pressure. Hydraulic valve rated pressure selection, should be based on the hydraulic system design work pressure to select the corresponding pressure level of the hydraulic valve. In general, the rated pressure value indicated on the hydraulic valve should be made to be greater than the operating pressure of the system.
4. Selection of Hydraulic Valve Flow
The nominal flow rate of the hydraulic valve is the nominal flow rate of the hydraulic valve passing through the rated operating conditions. The actual working flow of the hydraulic valve is related to the connection way of the oil in the system: the flow rate of the series circuit is equal and the flow of the parallel circuit is equal to the sum of the oil flow. When choosing the flow rate of the hydraulic valve, it is obviously the most economical if the rated flow of the valve is close to the working flow of the system. If the rated flow rate of the selector valve is smaller than the working flow, it is liable to cause hydraulic chucking and hydrodynamic force and may adversely affect the working quality of the valve. In addition, the flow rate of the valve can not be selected simply by the rated output flow rate of the hydraulic pump, since the flow rate of each circuit passing through each hydraulic system is unlikely to be the same. Therefore, in the selection, should consider the hydraulic valve where the loop may pass the maximum flow.