CENTRIFUGAL COMPRESSOR

• Main Authors: SUZUKI MASAHIRO, HOSHIDA TAKAHIRO, MITSUDA SATOSHI, NAKANE YOSHIYUKI, FUKUYAMA RYOSUKE, TAKASE YOHEI
• Format: Patent
• Language: English; Japanese
• Published: 10.10.2019
• Subjects: BLASTING; CYLINDERS; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; PISTONS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; SEALINGS; THERMAL INSULATION IN GENERAL; WEAPONS

To suppress the leakage of oil into an impeller chamber.SOLUTION: An extension line L1 of an oil guide face 93b is located outside a radial direction of a high-speed side shaft rather than a spiral groove 95, and an oil supply passage 60 supplies oil toward a communication groove 93 from an external peripheral side of a fixed ring 91 along the oil guide face 93b. The oil supplied to the communication groove 93 from the oil supply passage 60 flows into the communication groove 93 while being guided to the oil guide face 93b, and supplied to a positive pressure generation groove 94. Therefore, it is avoided that the oil supplied from the oil supply passage 60 flows in toward a seal face 92s while straddling the spiral groove 95 compared with, for example, the case that the extension line L1 of the oil guide face 93b intersects with the spiral groove 95, and the oil supplied from the oil supply passage 60 is supplied along the oil guide face 93b.SELECTED DRAWING: Figure 5 【課題】オイルがインペラ室内へ洩れ出してしまうことを抑制すること。【解決手段】オイル案内面９３ｂの延長線Ｌ１が、スパイラル溝９５よりも高速側シャフトの径方向外側に位置しており、オイル供給通路６０は、固定環９１の外周側から連通溝９３に向けてオイル案内面９３ｂに沿ってオイルを供給する。オイル供給通路６０から連通溝９３に供給されるオイルは、オイル案内面９３ｂに案内されながら連通溝９３を流れて正圧発生溝９４に供給される。このため、例えば、オイル案内面９３ｂの延長線Ｌ１がスパイラル溝９５と交差しており、オイル供給通路６０から供給されるオイルがオイル案内面９３ｂに沿って供給される場合に比べると、オイル供給通路６０から供給されるオイルがスパイラル溝９５を乗り越えてシール面９２ｓに向けて流れ込むことが抑制される。【選択図】図５