MECHANICAL SEAL

• Main Authors: NAKAJIMA KENTARO, KANNO TAKAO, KATO MASAFUMI, NISHIMURA SHOTA, OKA MASAO
• Format: Patent
• Language: English; Japanese
• Published: 31.01.2019
• 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 provide a mechanical seal capable of making slide surfaces of a sealing ring into a low-friction state.SOLUTION: A mechanical seal 1 is configured to slide a slide surface of one sealing ring with a slide surface of another sealing ring, to prevent sealed fluid from leaking from the inside to the outside in fluid equipment, or from the outside to the inside. At least one sealing ring 5 has a slide surface S1 where a carbon-based hard film 10 is formed on a surface 5a opposite to the other sealing ring 3, of a base material 5A constituting the sealing ring 5, and on the slide surface S1, a recess 9 is formed, where sealed fluid F is encapsulated by a recess part 5b formed at the base material 5A and an opening part 10b formed at the carbon-based hard film 10.SELECTED DRAWING: Figure 2 【課題】密封環の摺動面同士を低い摩擦状態とすることができるメカニカルシールを提供する。【解決手段】一方の密封環の摺動面と、他方の密封環の摺動面とを摺動させて、流体機器の内部から外部または外部から内部への被密封流体の漏れを防ぐメカニカルシール１であって、少なくとも一方の密封環５は、密封環５を構成する基材５Ａの他方の密封環３との対向面５ａに炭素系硬質膜１０が形成されて摺動面Ｓ１とされており、摺動面Ｓ１には基材５Ａに形成された凹部５ｂと、炭素系硬質膜１０に形成された開口部１０ｂとにより被密封流体Ｆを内在させる凹所９が形成されている。【選択図】図２