Nadeldüsen

Nadeldüsen, also known as needle nozzles, are a type of spray nozzle that utilizes a needle-like pin to precisely control the flow of fluid. The needle is typically conical or cylindrical and moves axially within the nozzle body. By adjusting the position of the needle, the opening through which the fluid exits can be varied, allowing for fine-tuning of the spray pattern and flow rate. This mechanism provides a high degree of control, making nadeldüsen suitable for applications where precise dispensing or atomization is required.

The principle of operation involves the needle's movement against a seat within the nozzle. When the needle is retracted, it opens a passage for the fluid to flow. As the needle is advanced, it progressively obstructs the passage, reducing the flow and potentially altering the spray characteristics. In some designs, the needle may also have features that influence the atomization process, such as grooves or specific tip shapes.

Nadeldüsen are commonly found in fuel injection systems for internal combustion engines, where precise fuel delivery is critical for efficient combustion and emissions control. They are also used in spray painting equipment, adhesive dispensing systems, and in various industrial processes requiring accurate fluid application. The materials used for nadeldüsen vary depending on the application and the fluid being handled, with common choices including hardened steel, ceramics, and specialized alloys to ensure durability and resistance to wear and corrosion. The design and manufacturing precision of nadeldüsen are essential for their performance and reliability.