SCREW PUMP Russian patent published in 2018 - IPC F04D3/02 F04D13/08 F04D29/18 

FIELD: engines and pumps.

SUBSTANCE: screw pump consists of a cylindrical body, inside of which a shaft is provided coaxially with it, equipped with a volume screw thread. The shaft is fixed to the first support, and through the second support is connected to the motor. The cutting is performed by an external, single-step, multi-turn with a given pitch. Cutting is by first supports specified number of voluminous turns connected via screw grooving having a diameter, the smaller than the diameter of the shaft by a specified amount, with an equal number of cylindrical volumetric cavities, performed with the specified step in the spaces between the turns of slicing. The cavities communicate with through holes, made in a predetermined amount in the body, for passage of liquid from the outside, further movement and injection through the partially cut last coil into the outlet chamber of the pumped liquid. The exit chamber is formed between the shaft end and its second support.

EFFECT: increasing pump capacity by increasing the efficiency of pumping liquid.

3 cl, 1 dwg