Who can explain the principle of honeycomb sealing of steam turbine with pictures and texts?

1. Structure: Honeycomb sealing generally uses a special brazing process to braze the honeycomb belt onto the gas sealing ring. The honeycomb belt is composed of small hexagonal honeycomb holes with a honeycomb-shaped inner hole surface. The core size is generally 0.8~6mm, the plate thickness is 0.05~0.2mm, and the honeycomb depth is 1.6~6mm. The smaller the core size, the thinner the plate. 2. Principle: When the shaft rotates at high speed, the airflow flows forward in a spiral manner. When the special airflow flows through the honeycomb belt, it is decomposed by the countless hexagonal grids on the honeycomb belt. The decomposed airflow forms a cyclone in the tiny space of the grid. The stiffness of this cyclone increases with the strength of the spiral airflow. In this way, several air curtains are formed between the shaft and the honeycomb belt. These air curtains can effectively prevent the outward flow of the medium. A strong rigid cyclone is formed between the honeycomb belt and the rotor, which effectively improves the stability of the rotor and reduces the amount of gas leakage, achieving efficient sealing. 3. Characteristics of honeycomb sealing: 1. Energy saving: For the same gap, the leakage amount of honeycomb seal is only half of that of labyrinth seal. As the pressure difference and rotation speed increase, the leakage amount is even lower. If several turns are used in combination, the effect will be better. The reduction in leakage will increase the efficiency of the unit. 2. Safe and reliable: The unique structure can effectively prevent the circumferential movement of the air flow and suppress the air flow excitation of the rotor. ； The honeycomb air seal is very thin and is made of high-nickel alloy foil. After special heat treatment, the hardness is very low and will not cause wear to any steel objects in contact with it or cause damage to the shaft. ； The honeycomb air seal has a dehumidifying effect, which can effectively absorb moisture and achieve automatic dehumidification. It is beneficial to the protection of leaves and reducing moisture loss. 3. Easy to install: Same as traditional air seal.

The description is very detailed, and there are no pictures to show the honeycomb steam seal with pictures and texts. http://bbs.hcbbs.com/thread-362836-1-1.html (Source: Haichuan.com)