Rotary turbine fluid pump

A rotary turbine fluid pump comprising:

• a cylindrical casing body;
• a driving motor assembly disposed within said casing body;
• a pump housing secured to one end of said cylindrical casing body, said pump housing having axially spaced first and second wall sections, said first and second wall sections cooperating with each other to define an essentially annular pump chamber communicating with an inlet and an outlet, and a turbine receptacle opening joined with said pumping chamber at the outer end thereof;
• a rotary turbine having an essentially solid disc-shaped turbine body and a plurality of turbine vanes which are arranged on the outer circumference of the turbine, said turbine being drivingly associated with said driving motor assembly to be driven by the driving torque of the latter, said turbine body having first and second surfaces opposing said first and second wall sections of said pump housing;
• said first and second wall sections of said pump housing and said first and second surfaces of said turbine being cooperative with each other to define an annular sealing chambers at both axial sides of said turbine;
• and
• said first and second wall sections of said pump housing and said first and second surfaces of said turbine being further cooperating to define a fluid path communicating with said sealing chamber for introducing pressurized fluid to the latter for establishing a floating seal therein, said fluid path having a first fluid path area substantially equal to that in said sealing chamber at the end joining with said sealing chamber and a second fluid path area greater than said first fluid path area at the end remote from said sealing chamber.

A rotary turbine fluid pump comprising:

• a cylindrical casing body;
• a driving motor assembly disposed within said casing body;
• a pump housing secured to one end of said cylindrical casing body, said pump housing having axially spaces first and second wall sections, said first and second wall sections cooperating with each other to define an essentially annular pump chamber communicating with an inlet and an outlet, and a turbine receptacle opening joined with said pumping chamber at the outer end thereof;
• a rotary turbine having an essentially solid disc-shaped turbine body and a plurality of turbine vanes which are arranged on the outer circumference of the turbine, said turbine being drivingly associated with said driving motor assembly to be driven by the driving torque of the latter, said turbine body having first and second surfaces opposing said first and second wall sections of said pump housing;
• said turbine being axially movable along a rotation axis thereof;
• and
• said first and second wall sections of said pump housing and said first and second surfaces of said turbine cooperating to specify a contact area for allowing frictional contact between opposing pairs of first wall section and said first surface and said second wall section and said second surface at the occurrence of axial shift of said turbine.

A rotary turbine fluid pump comprising:

• a rotary turbine having a plurality of turbine vanes which are arranged on the outer circumference thereof and which are rotatingly driven by means of a driving means, said rotary turbine having a pair of surfaces at its both axis ends;
• a pump housing defining therein a pumping chamber connected to an inlet for introducing fluid therethrough and to an outlet for discharging pressurized fluid therefrom, said pump housing having wall sections mating portions mating with said surfaces of said turbine;
• a portion of said wall section being inclined so as to gradually increase clearance between said wall section and said surface of said turbine toward the center, the difference of clearance at inner and outer ends thereof being in a range of 5 .mu.m to 20 .mu.m;
• means for defining sealing chambers between said surfaces and said wall sections for establishing a floating seal therebetween;
• and
• means for introducing pressurized fluid into said sealing chambers which defines a pressurized fluid path connected to said sealing chambers and a gradually reducing path area toward said sealing chamber.

A rotary turbine fluid pump comprising:

• a rotary turbine formed of a reinforced plastic comprising a glass matrix with phenol resin and a binder, said turbine having a plurality of turbine vanes which are arranged on the outer circumference thereof, driving means for rotatingly driving said turbine vanes, said rotary turbine having a pair of surfaces at its both axis ends;
• a pump housing defining therein a pumping chamber connected to an inlet for introducing fluid therethrough and to an outlet for discharging pressurized fluid therefrom, said pump housing having wall sections mating portions mating with said surfaces of said turbine;
• means for defining sealing chambers between said surfaces and said wall sections for establishing a floating seal therebetween;
• and
• means for introducing pressurized fluid into said sealing chambers which defines a pressurized fluid path connected to said sealing chambers and a gradually reducing path area toward said sealing chamber.