January 21, 2022

The Formation Principle Of Nozzle Spray Shape

Some of the spray shapes are columnar and some are cones. What is the principle of the formation of the spray shape?
So far, there are more than 20,000 nozzles. Generally speaking, the basic structure of the nozzle can be divided into “single-fluid” which relies solely on hydraulic spray and “two-fluid” which mixes one and gas. The basic shape of the spray is fan, solid cone, hollow cone, and four types of liquid column flow.

The main shapes of the spray are as follows:

The spray forming principle of fan nozzle:

The core theory of fan spray is that “membrane split” is sprayed from a high-pressure nozzle to the atmosphere (drip pressure), and it will form a film as a whole, and the thin film will first become a plate due to vibration, and then an unstable plate. The shape will become a column due to the influence of the surface tension of the liquid, and then be torn apart to become a droplet. This is called membranous fission. The particle diameter will change due to changes in pressure. Due to the cat’s eye structure and the diffraction structure of the nozzle hole, a fan-shaped spray is formed.

The spray forming principle of solid cone nozzle:

The core theory of solid cone spray is “internal flow channel”. When part of the fluid passes through the flow channel inside the nozzle, it is forced to swirl and then ejected, and the remaining liquid is ejected straight inside the nozzle. After the confluence of the two, the solid cone spray is produced. Precise spray pattern and correct angle can be achieved with the internal X-shaped channel and fine spray holes. Compared with other methods, the blocking problem can be greatly reduced.

The spray forming principle of the hollow cone nozzle:

The spray form of the hollow cone nozzle uses the principle of centrifugal force to flow the liquid supplied from the inlet into the cyclone chamber, and uses the centrifugal force of the vortex to diffuse the liquid and then eject it from the nozzle hole, forming a bell-shaped – hollow cone – liquid film. It becomes a circular spray shape. The principle is like putting water into a container. After the container is rotated, the water will concentrate on the wall of the container, and the center will become hollow, so that the spray principle of the hollow cone nozzle is formed.