Segmented steam seal design method for balance piston of reaction steam turbine

• Main Authors: LI HONGFU, CAI SHENGMING, YING BOFEN, DING XUDONG, LIU XIANGZHENG, ZHANG JUNHUI
• Format: Patent
• Language: Chinese; English
• Published: 29.07.2022
• Subjects: BLASTING; CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; ENGINE PLANTS IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; PHYSICS; STEAM ENGINES; WEAPONS

According to the design method for the segmented steam seal of the balance piston of the reaction steam turbine, the segmented steam seal of the balance piston can be better matched with the corresponding steam turbine to a certain extent. The invention provides a design method for segmented steam seal of a balance piston of a reaction turbine, which comprises the following steps of: 1, obtaining different steam seal pressure combinations according to the grouping condition of pressure stage groups of a unit; 2, a certain pressure combination is taken out, and the combination range of the diameter of each section of steam seal in the balance piston is determined; 3, determining an optimal steam leakage flow ratio equation of the first steam seal and the second steam seal according to the pressure combination in the step 2; 4, taking a plurality of points in a steam seal diameter combination range, calculating the air leakage, the total loss and the steam seal tooth number of the corresponding points one by on