FLUID MACHINE

• Main Authors: KAWAJIRI HIDEYUKI, NAKAGAWA NARITOSHI
• Format: Patent
• Language: English
• Published: 26.04.2012
• Subjects: BLASTING; CYLINDERS; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; LIGHTING; MACHINES OR ENGINES FOR LIQUIDS; MECHANICAL ENGINEERING; OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR; PISTONS; PRODUCING MECHANICAL POWER; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SEALINGS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THERMAL INSULATION IN GENERAL; WEAPONS; WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS

PROBLEM TO BE SOLVED: To provide a fluid machine which can improve the volume efficiency of equipment by reducing the flow amount of a leakage flow from a seal part between a rotary part and a stationary part.SOLUTION: In the fluid machine in an embodiment, the seal part 31 including an annular minute clearance is formed between a runner band 15 of a runner 12 constituting the rotary part and a seal liner 22 as a fixed part provided in opposition to the runner band 15. On a surface 24 of the seal liner 22 constituting the seal part 31, a groove 40 having a square shape is formed in the peripheral direction. In a cross section perpendicular to the groove forming direction of the groove 40, an angle between a side WU of the groove 40 on the most upstream side with respect to the flowing direction of a leakage flow and a side W0 of the groove 40 on an extension of the surface 24 of the seal liner 22 is 15-40°.