Displacement machine having a ceramic rolling bearing
US6354823B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2000 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Oct 6, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2220/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The displacement machine is intended in particular for use as a pump, and has a working area, formed in a housing, which working area is limited by two end walls and a casing, and is accessible via an inlet and an outlet for a working medium. At least one rotor, movably disposed in the housing, subdivides the working area, and a guide gearing for rotor control is connected to a drive apparatus located outside the working area. The invention has as its object to propose a displacement machine which can be manufactured less expensively and with less weight than known displacement machines of this type, and in particular can be operated without any special lubricant for the bearings. This object is attained in that the rotor, or respectively the rotors, is or are, supported at least partially inside the working area, and in that the bearing or bearings, disposed inside the working area, is, or are, accessible for the working medium, and is, or are, designed as rolling bearing made of ceramic materials, making possible operation of the displacement machine without lubricants. Contamination of the working medium from lubricant is thereby practically excluded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.