Centrifugal reaction impeller

FIELD: engines and pumps.

SUBSTANCE: centrifugal reaction impeller can be used in non-pressure devices, for example in centrifugal pumps and turbines. The impeller if made up of two plates with a circular belt rigidly fitted there between and furnished with closed discharge channels made therein. The aforesaid impeller is fitted on the shaft and has a hole to receive working medium. The discharge channels are arranged along the axial component perpendicular to the impeller radius, their outlets being directed towards the direction opposite to the impeller rotation. The impeller inner space features toroidal shape with a golden cross section.

EFFECT: reduced mechanical friction losses and higher efficiency.

3 dwg

 

The invention relates to hydromelioration and can be used in devices with large displacement, namely, centrifugal pumps for pumping fluid in a turbine installations.

Known Segner wheel (Great Soviet encyclopedia, volume 23, s.162, 1976), composed of vertical pipes, which strengthened the freely rotating horizontal pipe with the same horizontal bent in the opposite side ends.

The disadvantage of this design is the high frictional resistance of the air, which reduces the efficiency of the device close to zero.

The closest technical solution to the claimed invention is a reactive centrifugal impeller comprising two disks between which is rigidly fixed to the annular band performed it closed sloping drainage channels installed on the shaft and having in the Central part of the hole for the entrance of the working fluid, while the idler channels are located on an axial component that is perpendicular to the radius of the wheel, and targeted outputs in the direction opposite to the direction of rotation of the wheel, and most remote from the center of the wheel forming a channel is tangent to the inner circumference of the ring belt having a height equal to the diameter of the outlet channel, and a width equal to two the diameter of the water channel, and the radius of the free cavity wheels are made equal to not less than two diameters of the inlet for the working fluid (RF patent No. 2132973, BI No. 19, 1999).

A disadvantage of the known device is that the shape of the working space are not adequately aerodynamics, which leads to increased resistance to movement of the workflow, i.e. energy costs and, consequently, to reduce the operating pressure in the impeller, and thus lowers the efficiency of the devices large displacement

The objective of the invention is to increase the efficiency of the device large displacement.

In use of the present invention reduces the resistance to movement of the worker thread, while the free volume of the impeller, ending with drainage channels on the periphery, prevents slippage of the working fluid relative to the wall of the working cavity, and the proposed form of the inner surface provides a reduction of mechanical and hydraulic losses during operation, increasing the efficiency of the system.

The technical result is achieved by the fact that in the proposed centrifugal jet the impeller containing two discs in the inner cavity, between which is rigidly fixed to the annular band performed it closed sloping drainage channels installed on the shaft and having a Central h the STI opening for the entrance of the working fluid, thus, the idler channels are located on an axial component that is perpendicular to the radius of the wheel, and targeted outputs in the direction opposite to the direction of rotation of the wheel, and most remote from the center of the wheel forming a channel is tangent to the inner circumference of the ring belt, the inner cavity of the impeller is made in the form of a toroid, the cross section of which is formed by two adjacent arcs of circles of radius R1and R2, for which R1/R2=1,618 corresponds to the proportion of the Golden section and the centers of the cross-section removed to a distance equal to the radius R2in the center of the impeller is made Eminence formed by the rotation of the cross section of the inner toroidal surface.

The inner cavity of the impeller is designed as torroid, the cross section of which is formed by two adjacent arcs of circles of radius R1and R2, for which R1/R2=1,618 corresponds to the proportion of the Golden section and the centers of the cross-section removed to a distance equal to the radius R2.

Section of internal working cavity has a toroidal shape with the Golden section, which provides an optimal distribution of the working medium inside the cavity due to rassekaya his point, education is the major surface with the subsequent turbulence and idler channels.

The optimal width and height of the working band is determined empirically. The height of the annular band equal to the diameter of the outlet channel, determines the height of the peripheral part of the reactive centrifugal impeller, resulting in a decrease to the minimum mechanical loss by friction, and the width of the annular band, equal to two diameters of the outlet, ensures the formation of the guide channel, sustained by the axial component perpendicular to the radius of the impeller.

The radius of the free cavity of the impeller is not less than two diameters of the inlet for the working fluid supports the effective operation of the device, increasing with increasing it.

The radius of the inlet of RIand the external radius of the wheel RNRmay be in the ratio RI≈0,7·RNR.

The essence of the invention is illustrated figure 1-3.

Figure 1 shows reactive centrifugal impeller in the section.

Figure 2 presents the cross-section a-A.

Figure 3 the invention is presented in an isometric projection of the slit.

Centrifugal jet impeller comprises openings for the entrance of the working body 1, the internal cavity of the reactive centrifugal impeller 2, is made in the form of a toroid, the cross section of which is formed by two of capregen the mi arcs of circles of radius R1 and R2, the attitude which R1/R2=1,618 corresponds to the proportion of the Golden section and the centers of arcs of circles removed to a distance equal to the radius R2, drainage channels 3 located on the circumference of the internal cavity of the impeller (figure 2 and 3) and an axial component that is perpendicular to the radius of the wheel, and most remote from the center of the wheel forming a channel is tangent to the inner circumference of the cavity, elevation 4, formed by the rotating components of the arcs of circles R1and R2, the shaft of the impeller 5, the ring band 6.

Figure 3 shows a section of the inner surface and formed this surface is a half elevation (tip) 4, through which is a more optimal distribution of the working environment by rassekaya his educated edge.

Centrifugal jet impeller operates as follows.

Working fluid through the inlet 1 (1) fills the working cavity 2. During the rotation of the impeller working medium in the working cavity rotates with it, developing a maximum pressure corresponding to occur at a given speed of rotation of the tension of the centrifugal field, and is pushed into the discharge channels 3 ring band 6 (2), aimed in the opposite direction of rotation of the impeller. Optimal is uniform distribution of the working environment is due to rassekaya her educated edge 4. Rotation of the impeller is transmitted to the generator shaft 5.

Thus, the proposed solution allows to reduce losses and increase the efficiency of the device.

Centrifugal jet impeller mounted on the shaft and having an opening for entry of the working fluid and discharge channels located on the axial component perpendicular to the radius of the wheel, and oriented outputs in the direction opposite to the direction of rotation of the wheel, and most remote from the center of the wheel forming a channel is tangent to the inner circumference of the cavity, characterized in that the inner cavity of the impeller is made in the form of a toroid, the cross section of which is formed by two adjacent arcs of circles of radius R1and R2, for which R1/R2=1,618 corresponds to the proportion of the Golden section and the centers of the cross-section removed to a distance equal to the radius R2in the center of the impeller is made Eminence formed by the rotation of the cross section of the inner toroidal surface.



 

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