Labyrinth seal principle, the working principle of the labyrinth seal and labyrinth seal principle diagram

Working principle of labyrinth seal

labyrinth seal between the sealing cavity and the axis of rotation, formed from a set of sealing tooth slice of a series of rules of throttling clearance and expansion of cavity, when the gas flows through the seal the clearance between the shaft surface composition and tooth, airflow was a throttling effect, air pressure and temperature drop and flow velocity increased, after clearance is the larger of two sealing tooth form cavity. As shown, the gas in the cavity volume increase, the speed drop and form vortex flow, generate a certain amount of heat energy. Therefore, the gas in the cavity make temperature before returned to the throttle, gas each after a gap and then bigger cavity, airflow was a throttling and expansion. Along with the increase in gas flows through the gap and cavity number, and the decrease of the gap value, gas flow rate and pressure drop is more and more big, to pressure drop to approximate back pressure, gas no longer continue to drain, so as to realize the gas seal.

labyrinth seal assembly and runtime note

1) To ensure that the bearing axial string quantity is less than 0. 6 mm, such as big, in the runtime may lead to the bottom of the maze set of labyrinth and locating sleeve friction

2) Pump and motor concentricity to guarantee within the scope of the requirements: radial 0. 10 m, end face