Rotor sliding-vane machine

Abstract

A rotor sliding-vane machine comprises a rotor including working (1) and supporting parts (4) connected via force chambers (6) of variable length so that they rotate synchronously with a possibility of little reciprocal axial movements and tilts. The vanes (8) are located in vane chambers (7) of the working part (1) of the rotor and when the rotor is rotating they cyclically change the degree of protrusion into the annular groove (2) made on the face surface of the working part of the rotor. Between the supporting cover plate (5) of the housing and supporting part of the rotor there are supporting cavities hydraulically connected via the means of local pressures balancing to the force chambers of variable length and cavities of the working chamber in the annular groove of the working partof the rotor. Supporting cavities and force chambers of variable length are made so that pressure forces of the working fluid contained in the force chambers significantly balance pressure forces of the working fluid forcing out the working and supporting parts of the rotor from the working and supporting cover plates of the housing providing just a small tightening required for insulation.

Description

technical field [0001] The present invention relates to mechanical engineering and can be used as a high pressure rotor sliding-vane machine capable of operating in pump mode and hydraulic motor mode for greater efficiency and reliability for smooth transfer. Background technique [0002] For smooth conveying and high efficiency, a sliding vane pump should have a working chamber of constant cross-sectional area in the conveying area, low losses in terms of leakage and friction, and be free of cavitation. The above characteristics should be maintained over all operating ranges of displacement variation, pumping pressure and rotor rotational speed, and should also be virtually immune to working fluid contamination and pump element wear. [0003] The working chamber is arranged on the surface of the rotor. For example, in the pump of US570584, to provide a constant cross section required by the working chamber, it is preferable to combine the pump displacement adjustment device...

AI Technical Summary

Problems solved by technology

[0044] All of the above structures are characterized by increased expendable losses reducing their efficiency

The described means of reducing friction through hydraulic balancing of the rotor and movable seals does not produce perfect balancing and is not resistant to changes in the seal surface abutment characteristics of sliding isolation contacts due to the profile of local imperfections and contamination of the working fluid

Even if the change in leakage is insignificant, the impact on volumetric efficiency will lead to a large decrease in mechanical and overall efficiency

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