Rotary kinetic fluid motors or pumps – Runner has spirally arranged blade or fluid passage
Patent
1992-12-02
1994-09-06
Look, Edward K.
Rotary kinetic fluid motors or pumps
Runner has spirally arranged blade or fluid passage
4151701, 4151742, 4151981, 415204, 415206, 4152083, 416177, F04D 2928
Patent
active
053442814
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to constant displacement hydraulic machines and, more particularly, to a rotary vortex machine that can be used in the capacity of a pump, compressor or motor.
PRIOR ART
Widely known in the prior art are rotary machines used as pumps or motors having a stator with an internal working space and inlet and outlet ports, and a rotor capable of rotating and having a bypass passage with inlet and outlet ports.
However, the provision of friction pairs (plates-to-stator slots and plates-to-rotor pairs) in rotary machine reduces reliability of its design, its economy and specific speed.
Besides, such a design involves inevitable pulsations of service fluid in working chambers which may bring about breakdowns of the machine, all the more so at high pressures of the operating fluid.
Also known in the prior art is a rotary machine (SU, A, 735808) used as a pump and comprising a stator with an internal annular chamber with vanes, inlet and outlet ports for service fluid, and a stage for conversion of service fluid energy mounted in the stator on the driving shaft, said stage having the form of a rotor provided with an external annular chamber mating with the annular chamber of the stator and forming, together with it, a working annular chamber and a bridge accommodated in the annular chamber of the rotor and dividing it into suction and delivery volumes connected with the inlet and outlet passages of the stator by axial holes and bypass passages arranged parallel with a radial plane passing through the bridge.
However, in this type of communication of the suction and delivery volumes of the annular chamber with the inlet and outlet passages of the stator, the operating fluid in the zone of the bridge moves in opposite directions. The fluid flow is accompanied by high energy losses since the fluid flow from the stator inlet port to the suction volume of the working annular chamber turns many times through a considerable angle, passing from the axial holes into the bypass passages and thence, through other holes, into the annular chamber of the rotor.
Similar processes also occur at the rotor outlet.
It should be also noted that such a design of holes for admission and discharge of the operating fluid fails to shape said holes in a rational way from the viewpoint of hydrodynamics. Besides, the delivery and suction volumes in the rotor are spaced apart at a considerable distance because the axial ports are separated by a bridge arranged parallel with the radial plane which reduces the length of the operating chamber and, consequently, diminishes the region of effective vortex (circulating) interaction between the fluid flow and the vanes which, in turn, increases the back flow of the operating fluid and decreases efficiency.
SUMMARY OF THE INVENTION
The basic object of the present invention is to provide a rotary vortex machine wherein communication of the rotor annular chamber with the inlet and outlet passages of the stator will bring the losses of energy of the operating fluid to a minimum during admission and discharge from the rotor which, in turn, will increase the degree of conversion of energy of the service fluid in the rotary machine, increase its efficiency and reduce its dimensions.
This object is attained in the rotary vortex machine comprising a stator accommodating an internal annular chamber with vanes, inlet and outlet passages for the operating fluid, and a stage for converting the energy of the operating fluid installed in the stator on the driving shaft, said stage being in the form of a rotor having an external annular space combined with the annular space of the stator and forming, together therewith a working annular chamber and a bridge arranged in the annular space of the rotor and dividing it into suction and delivery volumes connected with the inlet and outlet passages of the stator wherein, according to the invention, the rotor is provided with curvilinear inlet and outlet passages connecting the suction and delivery volumes of the ann
REFERENCES:
patent: 748294 (1903-12-01), MacKenzie
Ageev Sharifzhan R.
Anokhin Vladimir D.
Ermakov Sergei J.
Filippov Viktor N.
Gusev Jury V.
Look Edward K.
Osoboe Konstruktorskoe Bjuro Po Konstruirovaniju, Issledovaniju
Verdier Christopher
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