RU2435075C2 - Pumping unit and pumping system in which it is used - Google Patents

Abstract

FIELD: engines and pumps. ^ SUBSTANCE: pumping system includes tower installed at water intake point and containing inner part and water-containing part located on it, outlet pipeline connecting water-containing part and the tank located on the shore and suction pipeline interconnected with inner part and passing from lower section of tower to water intake point and having the upward bent end with safety casing, and pumping unit installed in the tower. The unit pumps the water entering the inner part through suction pipeline to water-bearing part. The unit includes rotating shaft vertically installed in tower; rotor including screw pump, centrifugal pump located on it and rotor drive installed in the tower. Screw pump has inner housing with flotation cavity installed so that it can slide along the shaft on support bearing, and outer housing enveloping the inner housing and separated from it with the specified distance, and many blades installed between inner housing and outer housing and forming spiral pump channel. Centrifugal pump discharges in radial manner the water pumped with screw pump. ^ EFFECT: higher water pumping efficiency. ^ 6 cl, 8 dwg

Description

The invention relates to a pumping unit and a pumping system in which it is used, in particular to a pumping unit with an improved rotor for increasing the efficiency of pumping fresh or sea water in a pumping system.

Basically, the types of pumps are divided into turbine and volumetric. Turbo pumps are distinguished by high flow rates, relatively small sizes, low pressure and are designed to work with large volumes of liquid. These include centrifugal pumps. Volumetric pumps provide high head and low flow, and the flow is almost constant at any pressure value. Volumetric pumps include gear pumps, piston pumps, screw pumps, etc.

Centrifugal pumps include impeller and casing. They are devices in which centrifugal force occurs when the fluid rotates at high speed using the impeller, and the fluid is directed from the center of the impeller to its periphery as a result of a change in pressure associated with the centrifugal force. In gear pumps, fluid is directed from the inlet to the outlet when the two gears engaged with each other located inside the casing rotate. Gear pumps are designed to work with small volumes of liquid and are mainly used to supply oils, in particular lubricants.

As for screw pumps, the utility document KP0167567 describes a device in which a screw pump impeller with a spray-proof coating is inserted into a casing having a connecting hole and a plurality of guide vanes.

From the above it is seen that the centrifugal pump related to the turbopumps allows to supply large volumes of liquid, but at the same time has a small pressure. The gear pump, which is a volumetric type pump, allows, if necessary, to increase the pressure, providing high pumping efficiency, but it is impossible to significantly increase the flow. A screw pump can pump a large volume of water, but does not allow to increase the pressure.

When pumping fresh or sea water to supply it with any area by means of a screw or centrifugal pump, the efficiency of water supply is relatively low, resulting in significant operating costs.

The present invention is the creation of a pumping unit with increased efficiency of pumping water through the use of rotational and centrifugal forces of the screw, as well as the creation of a pumping system using the same forces.

The pump system of the present invention is easy to maintain and operate, and pressure can be easily adjusted in it.

The pump system according to the present invention also allows you to constantly maintain the location of the intake below the surface of the water and can convert the centrifugal force into the energy of the rise of water.

One object of the present invention is a pump assembly comprising a rotor including a screw pump and a centrifugal pump located on it, the screw pump includes a rotary casing located on a rotating shaft mounted on a frame with rotation, and a screw installed between the inner surface of the rotating housing and the outer surface of the rotating shaft and forming a pump channel; and the centrifugal pump is made with the possibility of radial discharge of water pumped by a screw pump, under the action of centrifugal forces.

The diameters of the rotary housing and screw of the screw pump can gradually decrease from the bottom of the pump unit to the centrifugal pump.

Another object of the present invention is a pump unit comprising a rotor including a screw pump and a centrifugal pump located on it, while the screw pump includes an inner housing located on a rotating shaft mounted on the frame for rotation, an outer housing surrounding the inner a casing and separated from it by a predetermined distance, and a plurality of blades mounted between the inner and outer casings and forming a spiral pump channel; and the centrifugal pump is made with the possibility of radial discharge of water pumped by a screw pump, under the action of centrifugal force.

The distance between the outer surface of the inner casing and the outer casing can be constant, and the diameters of the inner casing and the outer casing can gradually increase from the lower part of the pump unit to its upper part.

Another object of the present invention is a pumping system, which includes a tower installed in the place of water intake, containing the inner part and the water-containing part located on it; an outlet pipe connecting the water-containing part and the land-based reservoir; a suction pipe communicated with the inside, extending from the bottom of the tower to the water intake and having an upwardly curved end on which a safety cover is mounted; and a pumping unit installed in the tower for pumping water entering the interior through the suction pipe into the water-containing part, including a rotating shaft mounted vertically in the tower; a rotor comprising a screw pump and a centrifugal pump located on it, and a drive mounted in the tower for driving the rotor, the screw pump including an inner housing mounted for sliding along a rotating shaft and having a thrust bearing and a buoyancy cavity, an outer housing surrounding the inner casing and separated from it by a predetermined distance, and a plurality of vanes mounted between the inner and outer casing and forming a spiral pump channel, and the centrifugal pump is made with possibly radial ejection of water pumped by a screw pump under the action of centrifugal force.

The drive may be a motor driven by a pulley, the length of which is essentially equal to the distance of the rotor lifting along a rotating shaft mounted on a support bearing, and a driving pulley connected by a belt to the driven pulley.

The distance between the outer surface of the inner casing and the outer casing of the screw pump can be constant, and the diameters of the inner casing and the outer casing can gradually increase from the bottom of the pump unit to its upper part.

As described above, the present invention relates to a pumping unit and a pumping system in which it is used. The pump unit located in the tower installed at the water intake site includes screw and centrifugal pumps, thus lifting and sucking water by means of a screw are simultaneously performed, as a result of which the water transfer capacity is increased.

Although the present invention is described with reference to examples of variants of its implementation, for specialists in this field of technology it is clear that they can be made various changes without going beyond the scope of the claims.

1 schematically shows the design of a pumping system according to the present invention;

figure 2 shows a sectional view of a pumping unit installed in a tower according to one embodiment of the present invention;

figure 3 shows a sectional view of another embodiment of a pumping unit according to the present invention;

figure 4 shows a sectional view of another embodiment of a pumping unit according to the present invention;

figure 5 shows a sectional view of another embodiment of a pumping unit according to the present invention;

figure 6 shows the rotor shown in figure 5, a perspective view with a partial section;

Fig. 7 shows another embodiment of a drive installed in the tower of Fig. 5, a perspective view;

FIG. 8 is a cross-sectional view of a pumping unit according to a further embodiment of the present invention.

The pump system in accordance with the present invention is installed next to a river, lake or sea to select fresh or sea water and supply it to a land-based reservoir. An embodiment of a pumping system is shown in FIGS. 1 and 2.

As shown in figures 1 and 2, the pumping system 10 is installed on the banks of a river, lake or sea and includes a tower 13 containing a vertical part 11 and mounted on it water-containing part 12; a land-based reservoir 100 supplying water to a feed area, a purification system for producing drinking water, or an industrial installation. The pump system also includes an exhaust pipe 14 connecting the water-containing part 12 located at the top of the tower 13, and the tank 100; and a suction pipe 16 that communicates with the vertical portion 11 of the tower and exits from the bottom of the tower 13 to a deeper area of the river, lake or sea. The end of the suction pipe 16 is bent up, and a safety casing 15 is installed at this end.

The tower 13 also contains a pumping unit 20, pumping water entering the vertical part 11 through the suction pipe 16, into the water-containing part 12 and then into the tank 100 through the exhaust pipe 14.

The tower 13 is a concrete structure including a vertical part 11 and a water-containing part 12 located therein, into which water is pumped by the pumping unit 20. A water flow channel is located along the inner surface of the water-containing part 12 of the tower 13 so that the pumped water is guided to the exhaust pipe 14 by means of a centrifugal rotor pump, as will be described below.

Although not shown in the drawings, an observation platform may be located on tower 13, and additional equipment may be installed on the outer surface of tower 13.

As shown in figure 2, the pump unit 20 is installed in the tower 13 and is used to pump water entering the vertical part 11 through the suction pipe 16, in the water-containing part 12. The pump unit 20 includes a rotor 21 containing a screw pump 22 for vertical lifting water and a centrifugal pump 23 for pumping water in a radial direction from the screw pump 22; and a drive 25 for rotating the shaft 24 of the rotor 21.

The screw pump 22 of the rotor 21 includes a rotating housing 22a surrounding the rotating shaft 24 and mounted vertically for rotation in the vertical part 11 at a predetermined distance in the radial direction from the rotating shaft 24; and a screw 22c mounted between the outer surface of the rotating shaft 24 and the inner surface of the rotating housing 22a and forming a spiral pump channel 22b. As for the screw pump 22, the diameters of the screw 22c and the rotating housing 22a can gradually decrease from the lower part to the upper part to increase the relative amount of the initial water withdrawal, as shown in FIG. 3.

The centrifugal pump 23 of the rotor 21 includes a lower plate element 23a radially protruding from the upper edge of the rotating housing 22a; an upper plate element 23b mounted on the rotating shaft 24 at a predetermined distance from the lower plate element 23a; and vanes 23c located between the upper plate element 23b and the lower plate element 23a and radially protruding from the rotating shaft 24. The vanes 23c are spirally twisted to a predetermined angle. The rotating housing 22a is connected to the rotating shaft 24 via a screw 22c, so that the screw pump 22 and the centrifugal pump 23 rotate together with the rotating shaft 24.

The rotary shaft 24 of the rotor 21 is rotatably mounted so that both ends of the rotary shaft 24 are supported by the tower 13. To prevent vibration during rotation, at least one side of the outer surface of the screw pump 22 can be supported by a thrust bearing or roller. The rotating shaft 24 can also be rotatably mounted on a separate frame.

The drive 25 may be an engine 25a mounted in the upper part of the tower 13 to rotate the shaft 24. The drive shaft of the engine 25a can be connected to the rotating shaft 24 using power transmission elements, such as a belt and drive and driven pulleys.

Figure 4 shows the pump unit 30 in accordance with another embodiment of the invention, the same components as in previous embodiments of the invention are indicated by the same reference numbers.

As shown in FIG. 4, the pump unit 30 includes a vertical rotating shaft 31 mounted in a tower 13; a rotor 32 mounted on a rotating shaft 31; and an actuator 35 for rotating the shaft 31 in the same manner as in the above-described embodiments of the invention.

The rotor 32 includes a screw pump 33 and a centrifugal pump 34. The screw pump 33 comprises an inner housing 33a mounted coaxially with the rotating shaft 31; an outer casing 33b located at a predetermined distance from the inner casing 33a and having a larger diameter than the inner casing 33a; and vanes 33d located between the inner housing 33a and the outer housing 33b and forming a pump channel 33c.

The centrifugal pump 34 has essentially the same construction as in the previous embodiments, and includes a lower plate element 34a radially protruding from the upper edge of the outer casing 33b; an upper plate element 34b mounted on the rotating shaft 31 at a predetermined distance from the lower plate element 34a; and vanes 34c located between the upper plate element 34b and the lower plate element 34a and radially protruding from the rotary shaft 31. The number of vanes 34c can be the same as the number of vanes 33d and they can protrude in the radial direction relative to the vanes 33d.

The drive 35 has the same construction as in the previous embodiments, and is not described here.

5 and 6 show a pump unit 40 in accordance with another embodiment of the present invention.

As shown in FIGS. 5 and 6, the pump unit 40 includes a vertical rotating shaft 41 mounted in a tower 13; a rotor 42 mounted with the possibility of moving up and down along the rotating shaft 41 under the action of the buoyancy force of water entering the tower 13; and an actuator 46 mounted in the tower 13 for rotating the rotor 42.

The rotor 42 has a cavity in which a buoyant force is generated, and includes a screw pump 43 and a centrifugal pump 44. The screw pump 43 includes an inner casing 43b having a buoyancy cavity 43a and slidably mounted along the rotary shaft 41; an outer casing 43c surrounding the inner casing 43b and separated from it by a predetermined distance; and vanes 43e located between the inner housing 43b and the outer housing 43c and forming a pump channel 43d.

In order for the inner housing 43b to be slidably mounted along the rotary shaft 41, a support bearing 43f is provided in the hole passing through the buoyancy cavity 43a of the inner housing 43b, on which the rotating shaft 41 is slidably mounted. Between the pillow bearing 43f and the rotating shaft 41 can be mounted bearing 43g.

Centrifugal pump 44 has essentially the same design as in previous embodiments of the invention, and is not described here.

The drive 46 includes a driven pulley 46a that projects from the top of the rotor 42 along the rotary shaft 41 and has a predetermined diameter; a drive pulley 46c mounted on a rotating shaft of the engine 46b, which is installed in the tower 13; and a belt 46d connecting the driven pulley 46a and the driving pulley 46c. The driven pulley 46a of the actuator 46 has a length equal to the lifting distance of the rotor 42.

The drive 46 may also be an engine 53 mounted on a frame 52 configured to move up and down along a guide 51 located on the inner surface of the tower 13; and a rotating shaft 54 connected to the drive shaft of the engine 53, as shown in Fig.7. In this case, the rotor 42 should be installed with the possibility of free movement using the buoyancy cavity 43a up and down and can be mounted with the possibility of rotation on a variety of guide rollers located on the inner surface of the tower 13.

The screw pump 43 may be so designed that the diameters of the inner casing 43b and the outer casing 43c gradually increase from the bottom to the top with a constant width of the pump cavity, i.e. the distance between the inner casing 43b and the outer casing 43c, as shown in FIG.

The following describes the operation of pumping systems according to the present invention with the above design features.

As shown in figures 1 and 2, pure water enters the vertical part 11 of the tower 13 through the suction pipe 16. This eliminates the ingress of impurities or foreign substances into the suction pipe 16, since a cap 15 is installed on its upwardly curved end.

When water enters the vertical part 11, as shown in FIG. 2, the motor 25a, which is the drive 25, is rotated, as a result of which the rotor 21 starts to rotate. Using the rotational energy of the rotor 21, water is pumped upward along the spiral channel, i.e. a pump channel 22b formed by a spiral screw 22c located between the rotatable housing 22a and the rotary shaft 24. The pumped water is pumped radially using the centrifugal force generated by the centrifugal pump 23. At this time, the screw pump 22 can suck in water using a centrifugal pump 23, resulting in increased pumping efficiency. In particular, when the bottom portion of the screw pump 22 is enlarged, as shown in FIG. 3, the initial amount of water withdrawal can be increased, and thus, the supply of pumped water to the centrifugal pump 23 can be increased, thereby increasing the pumping efficiency. That is, the linear speed of the screw 22c in the lower portion of the screw pump 22 is higher, resulting in increased pumping power.

The water pumped in this way enters the tank 100 through the water-containing part 12 and the outlet pipe 14.

Figures 5 and 6 show a buoyancy cavity 43a formed in the rotor 42, which rises with water entering the inside of the tower 13. At this time, the belt 46d connecting the drive pulley 46c and the driven pulley 46a of the engine 46b moves up and down together with the driven pulley 46a and thus transmits rotation 46b to the rotor 42.

In particular, as shown in FIG. 8, in the case where the width of the screw pump 43 gradually increases from bottom to top, the centrifugal force resulting from the rotation of the rotor 42 acts on the water. Since the blades 43e are helically twisted, the water is rapidly pumped by the centrifugal force.

Thus, it becomes possible to increase the pumping power of the water pumped by the screw pump 43. The pumped water is pumped by the centrifugal pump 44, thereby increasing the pumping efficiency.

In addition, a pumping unit having a buoyancy cavity can pump water entering the vertical part of the tower at a predetermined depth from the surface of the earth. In particular, pumping of sea water can be carried out regardless of the level of water entering the vertical part, which is associated with ebb and flow.

Claims (6)

1. A pump assembly comprising a rotor including a screw pump and a centrifugal pump located on it, while the screw pump includes a rotary housing located on a rotating shaft mounted on a frame rotatably, and a screw mounted between the inner surface of the rotating housing and the outer surface of the rotating shaft and forming the pump channel, and the centrifugal pump is made with the possibility of radial discharge of water pumped by a screw pump, under the action of centrifugal forces. 2. The pump unit according to claim 1, in which the diameters of the rotating housing and screw of the screw pump are gradually reduced from the bottom of the pump unit to the centrifugal pump. 3. A pump assembly comprising a rotor including a screw pump and a centrifugal pump located on it, while the screw pump includes an inner housing located on a rotating shaft mounted on a frame rotatably, an outer housing surrounding the inner housing and separated a predetermined distance from it, and a plurality of blades mounted between the inner and outer bodies and forming a spiral pump channel, and the centrifugal pump is configured to radially discharge water pumped striation pump by centrifugal force, the distance between the outer surface of the inner housing and the outer housing is constant, and the diameters of the inner housing and the outer housing gradually increases from the bottom of the pump set to its upper part. 4. The pumping system, which includes a tower installed at the water intake site, containing the inside and the water-containing part located on it, an exhaust pipe connecting the water-containing part and the land-based reservoir, the suction pipe connected to the inside, passing from the bottom of the tower to the place water intake and having an upward curved end on which a safety cover is mounted, and a pumping unit installed in the tower for pumping water entering the interior through the suction a pipeline to the water-containing part, including a rotating shaft mounted vertically in the tower, a rotor containing a screw pump and a centrifugal pump located on it, and a drive installed in the tower for driving the rotor, and the screw pump includes an inner housing mounted with the possibility of sliding along a rotating shaft and having a support bearing and a buoyancy cavity, an outer casing surrounding the inner casing and separated from it by a predetermined distance, and a plurality of blades mounted between morning and outer casings and forming a spiral pump channel, and the centrifugal pump is made with the possibility of radial discharge of water pumped by a screw pump, under the action of centrifugal force. 5. The pump system according to claim 4, in which the drive is an engine driven pulley, the length of which is essentially equal to the amount of lift of the rotor along the rotating shaft mounted on the support bearing, and a drive pulley connected by a belt to the driven pulley. 6. The pump system according to claim 5, in which the distance between the outer surface of the inner casing and the outer casing of the screw pump is constant, and the diameters of the inner casing and the outer casing gradually increase from the bottom of the pump unit to its upper part.

Images