WO2023131892A1

WO2023131892A1 - Pumping system without an impeller shaft and with a rotating cylindrical volute

Info

Publication number: WO2023131892A1
Application number: PCT/IB2023/050083
Authority: WO
Inventors: Armando Francisco Leguizamon
Original assignee: LAMENSA, Marina Andrea
Priority date: 2022-01-06
Filing date: 2023-01-05
Publication date: 2023-07-13
Also published as: AR124484A1

Abstract

The present invention consists of a multipurpose system for pumping incompressible fluids, without an impeller shaft or rotor, and with a rotating cylindrical volute, having a reversible direction of rotation or not, containing one or more impellers, and having a self-propelled configuration or a motor in parallel, accelerating large volumes of water for rainwater drainage systems.

Description

Pumping system without a rotating cylindrical volute impeller shaft

Technical sector

[0001] The present invention consists of a multipurpose system for pumping incompressible fluids, lacking an impeller or rotor shaft, with a rotating cylindrical volute, reversible direction of rotation or not, containing one or more impellers, self-propelled configuration or with motor in parallel, accelerator for large volumes of water for storm drainage systems.

[0002] The proposed system can be used for the movement of incompressible fluids inside a pipe system, or outside a pipe system, to be installed in any part of a pipe extension or at the end of it. With higher yields than traditional systems. With the ability to vary the speed and flow of fluids. Of constructive configuration that can contain one or several different impellers or rotors that work compensating both the flow and the pumping pressure. With industrial, naval, automotive applications, flood control in pluvial systems, medical applications, oil industry, chemical.

Background of the invention

[0003] There is a great variety of pumps for the movement of fluids, such as centrifugal pumps, which have rotors, which can be open, semi-open or closed.

Centrifugal pumps can be classified in different ways: By the direction of the flow: radial, axial and mixed; By the position of the axis of rotation or arrow in: horizontal, vertical and inclined; By the design of the shell (shape) in: volute and turbine; Due to the design of the mechanical shell in: axially split and radially split; By the way of suction in: simple and double.

[0004] The operation of the centrifugal pump, also called rotodynamic pump, which is used to pump incompressible fluids or liquids, where the fluid enters through the center of the impeller or impeller, which has blades to conduct the fluid and, due to the effect of centrifugal force, it is driven to the outside, where it is collected by the casing or volute, or body of the pump . Due to the geometry of the body, the fluid is led to the outlet pipes or to the next impeller. So we can say that the water that enters the pump is through the center of the rotor and is expelled at ninety degrees from its entrance, changing the trajectory of the water. Centrifugal pumps cannot work in reverse, to expel fluids from where they aspire.

[0005] In the case of screw type pumps, they can consist of simple pumps, double screw pumps, or triple screw pumps. A screw pump is a type of hydraulic pump considered positive displacement. This pump uses an eccentric helical screw that moves inside a sleeve and causes liquid to flow between the screw and the sleeve. It is specifically indicated for pumping viscous fluids with high solids content, and can even pump dehydrated sludge from filter presses with a dryness of 22-25%.

[0006] Piston pumps can be axial and radial; both are available with fixed or variable displacement. It is a hydraulic pump that generates movement in it through the movement of a piston. Piston pumps are of the volumetric pump type, and are used to move fluids at high pressure or fluids with high viscosities or densities. Each movement of the piston displaces, in each movement, the same volume of fluid, which is equivalent to the volume occupied by the piston during its stroke. Piston pumps are only used for low volumes of high pressure water.

[0007] The peristaltic pump is a type of positive displacement hydraulic pump used to pump a variety of fluids. The fluid is contained within a flexible tube embedded within a circular pump casing, although linear peristaltic pumps have also been made. A rotor with a number of "rollers", "shoes" or "wipers" attached to the outer circumference compress the flexible tube. As the rotor rotates, the part of the tube under compression closes, or occludes, thus forcing the fluid to be pumped to move through the tube. Additionally, as the tube reopens to its natural state after the passage of the cam (reset), fluid flow is induced into the pump.

[0008] In the case of Archimedean screw pumps, it is a helical gravimetric machine used to lift water, flour, cereal or excavated material. [0009] In the case of the centrifugal submersible pump, this type of pump consists of an impeller or rotor coupled to an electrical motor shaft correctly insulated to avoid short circuits, when the rotor rotates it generates centrifugal force that drives the fluid through the volute towards the outlet hose or pipe.

[0010] Deep-well pumps are a type of pump that is basically a centrifugal pump, where an axis connects one or more rotors that are arranged in separate volutes, as a result of the forces the first impeller sucks through its center , the fluid to expel it through the external part of it, directing the fluid to the second rotor impeller, the conduits that it has direct the fluid towards the center of the second impeller, in this way the speed of the fluid is multiplied, thus it is driven out of the circuit .

[0011] Membrane or diaphragm pumps are a type of positive displacement pump, generally reciprocating, in which the pressure increase is carried out by pushing elastic walls, membranes or diaphragms, which vary the volume of the chamber, alternately increasing and decreasing it. Check valves, normally elastomer balls, control that the movement of the fluid is carried out from the area of lower pressure to that of higher pressure.

[0012] The action of these membrane or diaphragm pumps can be: a) Electric, by means of an electric motor, in which case it is said to be an electric pump; b) Pneumatic, using compressed air, in which case it is said to be a pneumatic pump.

[0013] All the aforementioned pumping systems are basically mechanisms that consist of an impeller or vapors of them (rotors) arranged or coupled to an axis that transmits the power of the electric or mechanical motor. The impeller or rotor is wrapped with a cavity or volute that channels the water towards the outlet. In all pumps, whether centrifugal, screw or deep well, the fluid enters through the center of the impeller or rotor, and is channeled or driven by centrifugal force towards the outer part of the rotor or the area furthest from the center of the pump. rotor.

Explanation of the invention

[0014] This invention proposes a new pumping system that replaces centrifugal pumps, with a better use of energy consumption, being therefore more efficient, since it does not divert the incomprehensible fluid that always follows a straight path through the bomb. The electrical consumption is less because the fluid that enters the pump does not change direction, which saves energy.

[0015] The proposed pumping system allows reversibility in the conduction of incomprehensible fluids, which can work for one side or the other, that is, a bidirectional pump, for example, this feature allows you to eliminate the quantity of pumps and valves in ships, because the new proposed system allows water to enter from outside the ship, to ballast it, or they can expel water from the ships' holds to remove the ballast, another application based on this Characteristic is its possible use in aircraft fuel tanks to maintain the level of fuel located in the wings and divert from one wing to the other quickly.

[0016] In addition, the force transmission axis system is eliminated, since it does not have it. It allows a quick installation, because the pipe must not be diverted where it is going to be placed, the pipe is simply cut, the part that corresponds to the length of the pump is removed and the rotary volute pump system will take its place, therefore , means that a pipe does not have to be diverted to place a pump.

[0017] In the proposed pumping system, the fixings of a centrifugal, screw or other type of pump, which must have a concrete base or metallic structure fixed to a concrete base, are eliminated, because this pump is placed in the same pipe where you will work without requiring any type of anchoring base.

[0018] In the present invention, the alignments of the motors between the pump and the motor that the traditional system has, which must be aligned with each other, are eliminated. In the cylinder or rotary volute pumping system, the motor is not aligned with the pump, but is fixed to the same structure of the pump, for the constructive configuration of motor in parallel, as schematized in figure 2.

[0019] In addition, a new pumping system is proposed that, for the configuration without a parallel motor, that is, self-propelled, as shown in Figure 4, does not require alignment between the pump and the motor, because the pump itself contains the pump rotor. squirrel cage, wound rotor, neodymium magnet rotor and the corresponding stator wound stator.

[0020] In the proposed pumping system, a drive shaft is not required. This characteristic allows it to start at maximum load, therefore, in the case of large pumps, it solves the problem that when starting forces are generated that break the transmission and due to this, these pumps start smoothly. [0021] In the proposed pumping system, the fixed cast iron or steel volute is eliminated by a rotating cylindrical volute that can be of large dimensions.

[0022] In the present invention, a pumping system is proposed that allows an acceleration of an incompressible fluid at the speed and flow rate required, according to the desired consumption, since the speed of the fluid can be controlled with the speed of rotation of the pump. rotating cylinder or volute. For example, in case of flooding it allows to accelerate the speed of the water in a tunnel conduit or fluvial pipe, to evacuate water and avoid flooding, by increasing the speed of the water in a pipe or conduit it can evacuate as much water as the acceleration generated by the pump .

[0023] The new proposed pumping system allows several cylinder or rotary volute pumps to work in parallel, linked to the same pipe and multiply the flow or pressure. In addition, it allows the installation of several rotary volute cylindrical pumps in line to increase the pressure and/or flow.

[0024] The new proposed pumping system allows the placement of a significant number of impellers according to the desired performance, the number of impellers will be determined by the length of the cylinder or rotating volute.

[0025] The proposed pumping system allows the incompressible fluid material entering the pump not to be in direct contact with the rotating volute, and because that does not happen, the liquid or fluid entering the pump comes into contact with the internal part of the impellers, separators and the alavés of the impeller protecting the cylinder or rotating volute from wear.

[0026] The new proposed pumping system allows the manufacture of large pumps without having to resort to casting large parts, since it is built from a cylinder that can be made of various materials, for example, laminated sheet metal, pipe without sewing or casting.

[0027] The proposed pumping system avoids problems of other pumping systems such as cavitation of the impellers.

[0028] The present invention provides a new pumping system that is smaller than the traditional ones to meet the same flow and pressure requirements.

[0029] This invention proposes a new pumping system that replaces centrifugal pumps, with a better use of energy consumption, therefore being more efficient, since it does not divert the incomprehensible fluid that always follows a straight trajectory through the bomb. Power consumption is less Because the fluid entering the pump does not change direction, which saves energy.

[0030] The proposed pumping system allows reversibility in the conduction of incomprehensible fluids, which can work for one side or the other, that is, a bidirectional pump, for example, this feature allows you to eliminate the quantity of pumps and valves in ships, because the new proposed system allows water to enter from outside the ship, to ballast it, or they can expel water from the ships' holds to remove the ballast, another application based on this Characteristic is its possible use in aircraft fuel tanks to maintain the level of fuel located in the wings and divert from one wing to the other quickly.

[0031] In addition, the force transmission axis system is eliminated, since it does not have it. It allows a quick installation, because the pipe must not be diverted where it is going to be placed, the pipe is simply cut, the part that corresponds to the length of the pump is removed and the rotary volute pump system will take its place, therefore , means that a pipe does not have to be diverted to place a pump.

[0032] In the proposed pumping system, the fixings of a centrifugal, screw or other type of pump, which must have a concrete base or metallic structure fixed to a concrete base, are eliminated, because this pump is placed in the same pipe where you will work without requiring any type of anchoring base.

[0033] In the present invention, the alignment of the motors between pump and motor that the traditional system has, which must be aligned with each other, are eliminated. In the cylinder or rotary volute pumping system, the motor is not aligned with the pump, but is fixed to the same structure of the pump, for the constructive configuration of motor in parallel, as schematized in figure 2.

[0034] In addition, a new pumping system is proposed that, for the configuration without a parallel motor, that is, self-propelled, as shown in Figure 4, does not require alignment between the pump and the motor, because the pump itself contains the pump rotor. squirrel cage, wound rotor, neodymium magnet rotor and the corresponding stator wound stator.

[0035] In the proposed pumping system, a drive shaft is not required. This characteristic allows it to start at maximum load, therefore, in the case of large pumps, it solves the problem that when starting forces are generated that break the transmission and due to this, these pumps start smoothly. [0036] In the proposed pumping system, the fixed cast iron or steel volute is eliminated by a rotating cylindrical volute that can be of large dimensions.

[0037] In the present invention, a pumping system is proposed that allows an acceleration of an incompressible fluid at the speed and flow rate required, according to the desired consumption, since the speed of the fluid can be controlled with the speed of rotation of the rotating cylinder or volute. For example, in case of flooding it allows to accelerate the speed of the water in a tunnel conduit or fluvial pipe, to evacuate water and avoid flooding, by increasing the speed of the water in a pipe or conduit it can evacuate as much water as the acceleration generated by the pump .

[0038] The new proposed pumping system allows several cylinder or rotary volute pumps to work in parallel attached to the same pipe and multiply the flow or pressure. In addition, it allows the installation of several rotary volute cylindrical pumps in line to increase the pressure and/or flow.

[0039] The new proposed pumping system allows the placement of a significant number of impellers according to the desired performance, the number of impellers will be determined by the length of the cylinder or rotating volute.

[0040] The proposed pumping system allows the incompressible fluid material entering the pump not to be in direct contact with the rotating volute, and because that does not happen, the liquid or fluid entering the pump comes into contact with the internal part of the impellers, separators and the alavés of the impeller protecting the cylinder or rotating volute from wear.

[0041] The new proposed pumping system allows the manufacture of large pumps without having to resort to casting large parts, since it is built from a cylinder that can be made of various materials, for example, laminated sheet metal, pipe without sewing or casting.

[0042] The proposed pumping system avoids problems of other pumping systems such as cavitation of the impellers.

[0043] The present invention provides a new pumping system that is smaller than the traditional ones to meet the same flow and pressure requirements.

Brief description of the figures [0044] For greater clarity and understanding of the invented object, it is illustrated with several figures in which it has been represented in one of its preferred forms of embodiment, all simply by way of illustrative and non-limiting example.

[0045] Figure 1 shows, by way of illustration, a traditional centrifugal pump system composed of a suction nozzle, rotor, volute, casing, bearings, seal, shaft, oil rings, and discharge nozzle.

[0046] Figure 2 schematizes the pumping system without impeller shaft, consisting of motor shaft (1), frame (2), clamping piece (3), a cylinder or rotating volute (4), an impeller or rotor (5), coupling to the pipes (6), mechanical seal (7), motor (8), space or separation chamber (9), toothed pulley (10), tightening nut (11), linkage seal (12), bearings (13), belt (14), rotating volute toothed pulley (15), locks (16), fixings (17), view of how a pipe is attached to the pump (19), cavity for stator with tin winding (20), cavity for squirrel cage rotor or winding (21).

[0047] Figure 3 schematizes the configuration without a motor in parallel composed of a rotating cylinder or volute.

[0048] Figure 4 schematizes the pumping system without a shaft and without a self-propelled motor made up of a frame (2), clamping piece (3), a cylinder or rotating volute (4), an impeller or rotor (5), coupling to the pipes (6), mechanical seal (7), space or separation chamber (9), toothed pulley (10), tightening nut (11), linkage seal (12), bearings (13), pulley toothed (15), insurance system (16), bolt fixing system (17), pipe where the pump is placed, that is, it simulates how a network pipe is attached to the pump (19), cavity for tin winding stator (20), cavity for squirrel cage rotor or wound rotor (21).

Preferred embodiment of the invention

[0049] The invention consists of a new pumping system for incompressible fluids that works with a rotating cylinder that contains one or more impellers or rotors inside, the rotating cylinder or volute rotates by means of a motor coupled to the structure of the pump, this applies to the model with motor in parallel.

[0050] For the self-propelled model, the cylinder or the rotating volute has a squirrel cage rotor attached to the outside, acting as a means to produce the rotation of the cylinder, the external frame contains a tin band stator that allows it to rotate. provides the magnetic field to the rotor, the fluid to be pumped enters through one of the ends, the impellers push the fluid towards the opposite side to the place of entry of the fluid.

[0051] The pumping system is basically made up of different parts such as a cylinder or rotating volute (4) with a cavity and shape that allows the placement of an impeller (5) or the necessary number of impellers required to obtain the pressure and desired flow to the specific function that they have to fulfill, the cylinder or rotating volute (4). The rotating cylinder or volute (4) rotates mounted on bearings (13), these can use the same track of the rotating cylinder or volute (4) as internal rolling ring, (with its respective hardness treatment) or bearing can be placed with raceway included. For the axial loads or forces generated by the displacement of the fluids, which are expelled through the pump outlet, a bearing can be placed at each end of the cylinder (13) of the axial load bearing type, they can also be placed two tapered bearings that support radial and axial load at the same time.

[0052] The cylinder or rotating volute is the one that contains or not the cavity (21), which can also contain a collector with the respective wound rotor, squirrel cage rotor, or rotor with neodymium magnets, depending on the choice of the type of magnetic core are the desired revolutions of the pump.

[0053] Inside the rotating cylinder or volute (4) at least one impeller or rotor (5) can be housed, depending on the total length of the rotating cylinder or volute (4), in addition, impellers (5) designed to flow or impellers (5) designed to generate pressure.

[0054] The constructive configuration of the interior of the cylinder or rotating volute (4), can combine space or separation chambers (9) between each impeller.

[0055] The rotating cylinder or volute (4) is mounted inside a fixed frame bearing bearings or covering structure (2), also called rotating cylindrical volute frame, it is the one that contains and allows the physical links to the pipes where the pump will be placed, it also allows the motor (8) that provides the mechanical energy for the operation of the pump to be placed.

[0056] In this frame (2) the bearings (13) are also mounted, it is linked to the quick coupling to the pipes (6), which contains the mechanical sealing seals (7). In the quick coupling (6) there are also the linkage seals (12) with the pipes of the system where the pump (19) is placed. [0057] An important detail is that the fixed frame (2), or rotating volute cylinder holder or covering structure, contains the cavity (20), where its dimension can vary depending on the speed of rotation of the pumping unit, it is also where a stator with stator winding can be placed for the self-propelled pump configuration, according to figure 4. This constructive configuration does not require an external motor.

[0058] The turning movement of the cylinder or rotating volute (4) in the event that it is not self-propelled is provided by an electric or internal combustion motor (8) that transmits its mechanical energy through a grooved toothed pulley (10) or smooth. This toothed pulley (10) is placed on the shaft (1) of the motor (8).

[0059] The mechanical force generated by the motor (8) is transmitted to the pump and specifically to the cylinder or rotating volute (4) through or by means of a belt (14) with the same characteristics as the pulley containing the engine (8). The rotating cylinder or volute (4) also has a pulley (15) with the same characteristics as the pulley that contains the motor (8) in order to receive the mechanical force generated by the motor (8).

[0060] Regarding the transmission of force to provide the rotation of the cylinder or rotating volute (4), the belt (14) can be replaced by means of a direct transmission to gear, in the cylinder or rotating volute (4) it is placed a toothed gear (15) and a toothed gear (10) is placed on the motor (8).

[0061] The revolutions per minute that it can develop depends on the technical requirements of the user, but it can work at 1 revolutions per minute or up to 60,000 revolutions per minute.

[0062] The connection of the pump to the network pipes (19), the circuit where the pump will be used, that is, where the pump is placed to fulfill the pumping function, this mentioned connection is by means of the parts called quick coupling to the pipe (6), which contains a tightening nut (11) that compresses the rubber seals or any type of polymer and that allows a hermetic closure (12), the nut (11) pushes the seal (12) that imprisons the network pipe (19) preventing the leakage of fluids from the system.

[0063] The impellers (5) are fastened to the cylinder or rotating volute (4) by the clamping piece (3) that has a socket that fixes them correctly and the quick coupling piece to the pipe (6) contains the seal (10 ). Part (3) is the part that keeps the impeller fixed to the cylinder or the rotating volute. Part (2) is the frame that contains all the parts of the boba or external structure.

Claims

1. A pumping system without a drive shaft characterized in that it has a rotating cylinder or volute (4).

2. A pumping system according to claim 1, characterized in that the rotating cylinder or volute (4) is bidirectional;

3. A pumping system according to claim 1, characterized in that the rotating cylinder or volute (4) contains at least one impeller (5) depending on the total length of the rotating cylinder or volute.

4. A pumping system according to claim 1 characterized in that the rotating volute (4) contains at least one space or separation chamber (9) depending on the total length of the cylinder or rotating volute.

5. A pumping system according to claims 3 and 4, characterized in that it can combine pressure-generating impellers (5) or flow-generating impellers (5).

6. A pumping system according to claim 5, characterized in that the combination of impellers (5) contain a rotor holder (3).

7. A pumping system according to claim 6, characterized in that the mechanical seals (7) provide airtightness or tightness to prevent fluid loss in the rotor holder (3).

8. A pumping system according to claim 1, characterized by being self-propelled by means of a stator winding stator housed in the cavity (20) in combination with a squirrel cage rotor, wound rotor with its respective collector or rotor. of neodymium magnets housed in the cavity (21).

9. A pumping system according to claim 1, characterized in that it has a mechanical energy transmission system provided by an electric motor (8) or an explosion located and anchored parallel to the part (2) and parallel to the cylinder. or rotating volute (4).

10. A pumping system according to claim 1, characterized in that it has a coupling system (6) that contains the mechanical sealing seals (7) and the connecting seal (12).

A pumping system according to claim 1, characterized in that the incompressible fluid entering the pump follows a straight trajectory without changing direction. A pumping system according to claim 1, characterized in that the impellers (5) do not have a transmission shaft. A pumping system according to claim 1, characterized in that the parallel motor configuration (8) has a transmission belt (14). A pumping system according to claim 10, characterized in that it can dispense with the belt (14) by direct transmission by placing a toothed gear (10) on the motor shaft (8) and a toothed gear on the cylinder pulley or volute. swivel (4) gear (15). A pumping system according to claim 1, characterized in that its assembly is carried out directly in the pipe (6) without an anchoring structure. A pumping system according to claim 1, characterized in that the electrical consumption is lower because the fluid that enters the pump does not change direction, which saves energy. A pumping system according to claim 1, characterized in that the shape is cylindrical without a drive shaft. A bidirectional pumping system according to claim 1, characterized in that it can be used to suck or expel incompressible fluids. A pumping system according to claim 1, characterized in that it can operate between 1 revolution per minute up to 60,000 revolutions per minute. A pumping system according to claim 1, characterized in that at least one pump can be placed in parallel sharing the same pipe (6). A pumping system according to claim 1, characterized in that at least one pump can be placed in line sharing the same pipe (6). A pumping system according to claim 1, characterized in that the incompressible fluid that enters the pump comes into contact with the internal part of the impellers (5) and separators (9).