FLUID MACHINE

• Main Authors: IWATA KOHEI, MASAKI DAISUKE, MORI TATSUSHI, KASHIWA SHINTARO
• Format: Patent
• Language: English; Japanese
• Published: 08.04.2024
• Subjects: BLASTING; CYLINDERS; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; PISTONS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS; SEALINGS; THERMAL INSULATION IN GENERAL; WEAPONS

To provide a fluid machine which can inhibit deterioration of seal performance by a seal member due to elastic deformation of the seal member caused by wobbling of a rotary shaft.SOLUTION: In a root pump, a buffer member 34 located adjacent to a second seal member 28 in a radial direction is provided between a rotor housing 14 and a rotary shaft 16. The buffer member 34 has an annular shape through which the rotary shaft 16 penetrates. A first groove 361 extending in a circumferential direction of the rotary shaft 16 is opened on a first end surface 34a of the buffer member 34 so as to elastically deform the buffer member 34 more than the second seal member 28. Further, a second groove 362 extending in the circumferential direction of the rotary shaft 16 is opened on a second end surface of the buffer member 34 so as to elastically deform the buffer member 34 more than the second seal member 28.SELECTED DRAWING: Figure 4 【課題】回転軸の軸ブレに伴うシール部材の弾性変形を原因として、シール部材によるシール性能が低下することを抑制できる流体機械を提供すること。【解決手段】ルーツポンプにおいて、ロータハウジング１４と回転軸１６との間には、第２シール部材２８と径方向に隣接する緩衝部材３４が設けられている。緩衝部材３４は、回転軸１６が貫通する環状である。緩衝部材３４の第１端面３４ａには、緩衝部材３４を第２シール部材２８よりも弾性変形させるように、回転軸１６の周方向へ延在する第１溝３６１が開口している。また、緩衝部材３４の第２端面には、緩衝部材３４を第２シール部材２８よりも弾性変形させるように、回転軸１６の周方向へ延在する第２溝３６２が開口している。【選択図】図４