Non-contact hydrodynamic bearing sealing ring

Abstract

The invention discloses a hydrodynamic bearing sealing ring, which relates to the sealing technology and is a non-contact hydrodynamic bearing sealing structure of a new structure form. The hydrodynamic bearing sealing ring comprises a shell, a bearing body, a pressure-increasing flow passage groove and a vibration-reducing elastic ring. The hydrodynamic bearing sealing ring is structurally characterized in that the bearing body is provided with double rows of sealed fluid medium pressure supply holes, and adopts a nozzle-throttling tangential pressure supply hole structure; the inner surfaceof the bearing body is provided with a pressure-increasing flow passage groove structure; and the bearing sealing ring body is made of abrasion-resistant, high-temperature resistant and self-lubricating materials, and the vibration-reducing elastic ring is made of rubber rings, metal rubber and elastic composite material and the like. The hydrodynamic bearing sealing ring not only greatly improves the capacity of the bearing body on bearing the external load and the short-time contact abrasion-resistant performance of dynamic and static components, but also reduces the requirements of a working medium on indexes such as impurity, temperature and the like. The hydrodynamic bearing sealing ring has the advantages of good sealing effect, stable operation and high reliability, and further broadens the range of project application of sealing products.

Description

technical field [0001] The invention relates to the technical field of rotating mechanical shafts, and relates to a non-contact fluid dynamic bearing sealing ring. Background technique [0002] Leakage is one of the most common failures of mechanical equipment. The leakage of the working medium or lubricant in the equipment will cause waste and pollute the environment; the leakage of flammable, explosive, corrosive, toxic and other special substances will endanger the safety of people and equipment. With the development of modern industrial technology, it is becoming more and more difficult to seal micro gas turbines that need to operate at high pressure, high temperature and high speed, and the pharmaceutical, chemical and nuclear energy industries have higher and higher requirements for sealing performance. The non-contact fluid dynamic sealing structure is a high-tech developed rapidly in the middle of the 20th century. Especially, the fluid dynamic bearing body seal has...

AI Technical Summary

Problems solved by technology

However, due to the structural characteristics of these two types of hydrodynamic floating ring seals, the bearing body cannot bear the external load, the short-term contact wear resistance of the dynamic and static parts is poor, the material and process performance are not easy to achieve, and the dynamic and static gaps are prone to rubbing damage. failure

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