Requirements And Design Principles Of Hydraulic Valves

1. Requirements

(1) The action is flexible, the function is reliable, the impact and vibration are small during operation, the noise is small, and the service life is long.

(2) When the fluid passes through the hydraulic valve, the pressure loss is small; when the valve port is closed, the sealing performance is good, the internal leakage is small, and there is no external leakage.

(3) The controlled parameters (pressure switch or flow) are stable, and the amount of change is small when subjected to external disturbances.

(4) Compact structure, convenient installation, debugging, use and maintenance, and good versatility.

2. Design principle

All designs from details must fully consider whether it can meet the needs of the device or equipment. When designing a hydraulic valve, first consider whether the hydraulic valve can meet the requirements of the entire hydraulic valve group, and whether each hydraulic valve can be realized. For each functional requirement of the machine, it is finally necessary to judge whether the design is carried out in accordance with the principles of the entire hydraulic system. Although the hydraulic valve group is composed of a certain number of hydraulic valves, there are still many components inside it, and the number of these components can neither be particularly large nor reduced. If the number of these components is too large, it will increase the burden of the hydraulic valve group, that is, the design is unreasonable. Once the number of components is too small, the oil circuit integration will lose part of the function, the expected effect will not be achieved, and the material will be wasted .

The design of the hydraulic valve is mainly for the design of the hydraulic valve group, and the hydraulic valve group must consider the oil filter circuit before the design. It is necessary to determine in advance which parts of the oil circuit can be integrated. The design of the oil circuit must be simple and save money. Go for unnecessary steps. After the oil circuit is determined, the main ones are the inclined holes and the process holes. These things on the oil road should be reduced, so long as they are enough, there is no need for too many. In the design of the inclined holes and the process holes, pay attention to the diameter of the hole. With the matching of traffic, the direction and position must be appropriate, and the overall situation must be considered to ensure that the requirements are met. If there is some inappropriate orientation or position, and the components need to be adjusted, it is necessary to ensure simple and convenient operation and maintenance.

The design of the hydraulic valve is first discussed from the design size of the hydraulic valve. The length, width, and height of the hydraulic valve group are generally determined with reference to the size of the components that make up the hydraulic valve group. For example, the height of the hydraulic valve group should be as consistent as possible with the height of the components without affecting the actual function. The length of the hydraulic valve group is determined by the diameter or length of the screw hole without affecting the layout and structure. The width and length of the hydraulic valve block are roughly the same as the determining factors. Secondly, we introduce dimension. This step is mainly used when designing and drawing. It is necessary to mark the ports, apertures, dimensions of each group, size and so on of some components. The last is the design of the channel. The most important thing in this design is the layout. To make a comprehensive overall arrangement for this system, to classify the oil circuit, firstly, the main oil circuit must be connected, and then, for the small oil circuit or other The oil circuit is gradually turned on again. When designing the passages of these hydraulic valves, it is necessary to ensure that the length is appropriate, the angle of rotation is relatively small, and the holes of the oil passages are appropriate, so that the weight, size and volume of the hydraulic valve group can be effectively controlled and used reasonably.