JP2003097482A - Pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a constitutionally simple and inexpensive pump. SOLUTION: There are provided the pump 10, at least one tightly sealed first chamber 19 and at least a second chamber adjacent to the first chamber. The second chamber defines a fluid passage, and has a fluid inlet 15 and an outlet 16. A stator is arranged in the first chamber. In addition, a rotor-turbine assembly 11 is guided by the stator 12, and drives a fluid to the outlet 16 from the inlet 15. A rotor and a turbine are integrated, and are completely arranged in the second chamber 17.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to pumps, and more particularly to hydraulic pumps.

[0002]

BACKGROUND OF THE INVENTION There are currently various types of electromechanical pumps used to drive fluids, which electromechanical pumps generally have an electromagnetic portion essentially comprising a stator and a rotor. It consists of a chamber and another chamber with a hydraulic part consisting essentially of a hydraulic turbine driving a liquid. However, the electromechanical chamber and the hydraulic chamber need to be disconnected from each other to prevent liquid from reaching the stator and rotor, causing a short circuit and irreparable damage. is there. Therefore, some mechanical devices such as rotating shafts, roller bearings, bearing journals, cooling systems, hydraulic seals, etc. are required to transfer rotary motion from the rotor to the hydraulic turbine while making the disconnection between chambers. It is said that

For example, the roller bearing journal has a function of supporting a rotating shaft of a rotor on which the rotor cage is mounted, so that when the rotor cage is guided by the magnetic force of the stator, it is assisted by the bearing to rotate. The child rotates. Of course, the journal is lubricated with oil or grease to reduce friction and wear between the contacting parts.

One end of the rotary shaft of the rotor is connected to a hydraulic turbine formed of blades, which is driven by a rotor to rotate the liquid to be pumped. To start.

To prevent the temperature of the stator and rotor from reaching undesired temperatures during operation of the stator and rotor, an external cooling system, usually a ventilator, is used. In such a cooling system, a propeller is connected to an end of a rotating shaft of a rotor located on the opposite side of the hydraulic pump generally outside the pump, and the propeller uses the rotation of the rotor to rotate the stator and the rotating shaft. Rotate to cool the child.

[0006]

Prior art pumps rely on physical seals to operate in perfect condition to prevent liquid from flowing from the hydraulic chamber to the electromagnetic chamber. As described above, if the liquid comes into contact with the stator and the rotor, short circuit and lubrication of the journal may be reduced, and the rotor may stop.

Accordingly, a conventional pump has a tightly sealed chamber in which a rotor, which is arranged and guided in a chamber, is arranged via a drive shaft in another liquid passage chamber, a hydraulic turbine. Transmit the rotational force to. In this case, these pumps need to have multiple sealing mechanisms to prevent damage that would render the pump impractical. In addition, the wear of these sealing mechanisms as a result of their use compromises the mechanical effectiveness of such pumps. Thus, this combination device requires expensive parts, complicated manufacturing processes, and ongoing maintenance to keep such a pump running, which makes the combination device costly. It has the drawback of becoming

From this, it is a primary object of the present invention to eliminate the need for seals such as physical seals or gaskets and external cooling systems such as roller bearings, drive shafts and ventilators. The aim is to simplify the construction and thereby reduce the chance of pump damage. The new pump motor further cools the stator-rotor assembly by circulating the pumped fluid itself, as described in patent application PI0004206-4.

In addition, it is an object of the present invention to provide a pump which is more compact than conventional pumps and which is easy to manufacture and assemble due to the reduced number of components, which allows good automation of manufacturing and cost. Can be reduced.

Another object of the present invention is to provide a pump that is more effective, that is, has less energy loss.

In addition, it is an object of the present invention to provide a pump which is safe, protected and corrosion resistant so that it can be immersed and installed in an erosive and uncooled environment. Become.

A further object of the present invention is to provide a pump which has a low noise level and is lubricated by the circulating fluid itself.

[0013]

The present invention achieves the above objectives with a pump having a casing. The casing has at least one tightly sealed first chamber and at least one second chamber adjacent to the first chamber. The second chamber comprises a fluid passage and has an inlet and an outlet for fluid. The chambers are separated by walls, preferably of injection molded polymeric material.

The pump further comprises a stator located within the first chamber. In a preferred embodiment, the stator is located proximate to the wall separating the first and second chambers so that the fluid circulating through the second chamber cools the stator by heat transfer.

An integral rotor and turbine assembly, generally located within the second chamber, is provided, at least a portion of which is coaxial with the stator. The assembly is guided by the stator and drives fluid from the inlet to the outlet. When the pump is activated, at least a fluid film is maintained around the rotor-turbine assembly so that the journal has less friction and full rotation, which is unnecessary.
In the space between the rotor / turbine assembly and the stator, the so-called gap, the walls of the first chamber and the second chamber are arranged substantially, and a fluid film circulating between the walls of these chambers is provided. To be

The metallic component, referred to as the rotor cage, which is preferably made of iron and aluminum and is guided by the stator, is provided in a tightly sealed rotor-turbine assembly. In the preferred embodiment, such a rotor-turbine assembly is formed of a polymeric material and additionally perforated to provide passages for the turbine in the rotor. In a possible embodiment of the invention, the turbine of the rotor-turbine assembly comprises turbine blades for exerting a centrifugal force on the fluid. Thus
In operation of a possible pump embodiment, fluid enters the rotor-turbine assembly after passing through the inlet of the second chamber, passes through internal passages, and reaches the outlet after reaching the turbine blades. Driven.

However, instead of exiting directly through the outlet, some of the fluid circulates around the first chamber,
Cool the stator by heat transfer. Thus, heat exchange between the circulating fluid and the drive assembly (rotor / turbine assembly and stator) cools the drive assembly, eliminating the need for an external cooling system. This keeps the temperature of the drive assembly always at the desired level for good operation.

In addition, the circulating fluid is used as a lubricant. The circulating fluid film passes between the walls of the second chamber and the rotor / turbine assembly, which allows the rotor / turbine assembly to rotate in a floating manner within the second chamber by inductive forces. Like

From the above, the pump of the present invention is a ventilator, even though the pump basically consists of conventional induction means and motion transmission means such as a stator and a rotor.
There is no need to use roller bearings, drive shafts and mechanical seals, which is simple in construction and cheap to manufacture.

The present invention will be described in detail below with reference to the drawings.

[0021]

DETAILED DESCRIPTION OF THE INVENTION FIG. 1 shows a conventional pump used today. This pump has a coiled stator 4
, A rotor 5, and a roller bearing 3 supporting the rotating shaft 9, and the cage of the rotor 5 is attached to the rotating shaft 9. The rotating shaft 9 reliably transmits the driving force from the rotor 5 due to the induction of the magnetic field of the stator 4. In FIG. 1, there are a ventilator 1 for surely cooling the stator / rotor assembly, and covers 2 arranged on both sides of the rotor 5 and supporting roller bearings.

In addition, in order for this type of pump motor to work well, the rotor 5 is perfectly centered with respect to the stator 4, so that the contact between these magnets is made. To be prevented. In the pump motor shown in FIG. 1, a space called a gap between the rotor 5 and the stator 4 is filled with air.

FIG. 1 further shows the physical seal 8. These physical seals 8 are widely used in conventional pump motors to allow ventilation and separation between the electrical and hydraulic parts of the pump motor. The hydraulic part consists of a turbine 7 and a vortex chamber 6.

On the other hand, FIG. 2 shows a preferred embodiment of the present invention. In FIG. 2, some elements shown in FIG. 1 are omitted. This embodiment shows a pump 10 with a casing 14. The casing 14 has a tightly sealed first chamber 19 and a central second chamber 17, which comprises at least one inlet 15 and one outlet 16, which inlet 15 and outlet 16 A passage 18 is defined therebetween. Casing 14 is formed from a polymeric material or any other type of material suitable for particular conditions, including adverse weather conditions.

An integral rotor and turbine assembly 11 is located within chamber 17 and drives the fluid passing through chamber 17. The rotor / turbine assembly 11 is formed of a polymeric material and additionally has holes drilled therein to define a passage for the turbine. In this embodiment, the turbine of the rotor / turbine assembly 11 comprises blades for exerting a centrifugal force on the fluid. Thus, in operation, fluid enters the rotor / turbine assembly 11 after passing through the inlet 15 of the chamber 17, passes through the internal passages, reaches the blades of the turbine, and then drives toward the outlet 16. Be punished.

The casing 14 has a first chamber 19 tightly sealed from the fluid circulating through the second chamber 17. Outer wall of casing and first chamber 19
The wall separating the second chamber 17 from is made of an injection moldable polymeric material. In addition, the first chamber 19
Provided therein is a stator 12 known to those skilled in the art, which magnetic field induces the drive of a rotor-turbine assembly 11 arranged in a second chamber 17 in which a fluid circulates.

In this embodiment of the pump of the present invention, a second chamber is further defined with a passage separate from the passage leading from the inlet to the outlet, and a portion of the fluid circulates through the chamber. In this embodiment, such passages allow fluid to circulate around the first chamber 19 and heat transfer to cool the stator 12 disposed within the first chamber 19.

In addition, the inlet 15 enters the second chamber 17
A small portion of the fluid that circulates through the second chamber 17
Through a conduction means 13 between a portion of the wall of the rotor and the rotor-turbine assembly 11 thereby forming a uniform fluid film. This fluid film is
Allows the turbine assembly 11 to rotate freely in the liquid without contacting the walls of the second chamber 17. In this way, the fluid film acts as a bearing for the rotor / turbine assembly 11, while at the same time acting as a lubricant that effectively eliminates friction between the walls of the second chamber and the rotor / turbine assembly 11. And make the noise level very low. The rotor-turbine assembly 11 is submerged in the liquid without contacting the wall of the second chamber 17,
The magnetic field generated by the stator 12 maintains the rotor / turbine assembly 11 in a balanced position about its axis. In this way, the magnetic force prevents the assembly from coming into contact with the wall of the second chamber 17 in a rotational movement.

In view of the above, the noise level is reduced because the second chamber 17 has a passage that allows the liquid to circulate. Moreover, this eliminates the need for dedicated lubricants and external cooling systems. Also, the pump is basically made of injection-moldable polymer material, and the number of components is smaller than before (that is, there is no seal), so that it is easy to assemble and the cost is low. Become. In addition, friction between the rotor / turbine assembly 11 and the wall of the second chamber 17 is reduced, thus minimizing energy loss.

With respect to another important feature of the invention, the space between the stator 4 and the rotor 5 of a conventional pump, the so-called gap, was filled with air. On the other hand, in the present invention, in addition to the liquid layer 13, the wall of the second chamber 17 and the wall of the rotor / turbine assembly 11 are made of a polymer material, and
The magnetic material of the stator 12 and the rotor / turbine assembly 11 are allowed to be perfectly centered, and the rotor / turbine assembly 11 is well balanced about its drive axis. Will be placed. This avoids contact with the wall of the second chamber 17 during rotation.

In addition, the present invention provides a corrosion resistant pump because the resin-coated surface is in contact with the fluid. Therefore, the fluid moves around without any damage to the pump motor. In addition, since the liquid itself is used as a coolant, the pump of the present invention is installed without being ventilated or submerged in the cooling medium.

Although an example of the preferred embodiment of the present invention has been described, the scope of the present invention includes other modifications and is limited only by the content of the claims.

[Brief description of drawings]

FIG. 1 is a sectional side view of a conventional typical pump motor.

FIG. 2 is a sectional side view of an apparatus for driving a liquid of the present invention.

[Explanation of symbols] 11 ... Rotor / turbine assembly 12 ... Stator 14 ... Casing 15 ... Entrance 16 ... Exit 17 ... First chamber 18 ... passage

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F04D 13/06 F04D 13/06 H J 29/02 29/02 29/04 29/04 A 29/22 29 / 22 A 29/42 29/42 E F 29/44 29/44 A E 29/58 29/58 P (72) Inventor Ricardo Augusto de Faccio Oliveira Brazil, Rio Grande do Sul, Caxias do Sul, Jardim Eldorado, Rua Alerxo Sofefani 774 (72) Inventor Fernando August Becker Brazil, Rio Grande do Sul, Porto Alegre, Rua Bardino Roeling 70 F-term (reference) 3H022 AA01 BA01 BA03 BA04 BA06 BA07 CA01 CA06 CA21 CA48 CA50 CA51 CA54 DA02 DA07 DA08 DA20 3H033 AA01 BB01 BB06 BB13 CC01 CC03 CC05 CC06 CC07 DD01 DD26 DD29 D D30 EE09 EE11 EE13 EE14 EE19 3H034 AA01 BB01 BB06 BB13 CC01 CC03 CC05 CC06 CC07 DD01 DD24 DD28 DD30 EE09 EE11 EE12 EE13 EE14 EE18 3H035 AA01 AA06

Claims (8)

[Claims] 1. At least one tightly sealed first chamber (19) and at least one second chamber (17) adjacent to the first chamber, the second chamber being for fluid. Defining a passage (18), having an inlet (15) and an outlet (16) for the fluid, the first chamber and the second chamber being separated by a wall, and further the first chamber (19) A stator (12) disposed therein, and a rotor capable of being driven by the stator to drive fluid from the inlet (15) to the outlet (16);
A turbine assembly (11), at least a part of the rotor-turbine assembly being arranged coaxially with respect to the stator, wherein the rotor and the turbine are integral and a complete first A pump (10) arranged in two chambers, whereby at least a fluid film (13) is maintained around the rotor-turbine assembly (11) during operation. 2. The pump (10) of claim 1 wherein said rotor / turbine assembly 11 is perforated to define an internal passage for the turbine in the rotor. ). 3. Pump (10) according to claim 1 or 2, characterized in that the walls of the first chamber (19) and the second chamber (17) are made of an injection moldable polymeric material. . 4. The rotor / turbine assembly (11) is made of a polymeric material and internally has metallic components that can be guided by a stator (12). A pump (10) according to any one of 3 to 3. 5. A pump (10) as claimed in any one of the preceding claims, characterized in that the metallic component is made of iron or aluminum. 6. The stator (12) is arranged at a position close to a wall separating the first chamber (19) and the second chamber (17), whereby a circulating fluid is transferred by heat to the stator. A pump (10) according to any one of the preceding claims, characterized in that it is capable of cooling. 7. A pump (10) as claimed in any one of the preceding claims, characterized in that the turbine of the rotor-turbine assembly comprises blades for exerting a centrifugal force on the fluid. 8. The wall between the first chamber (19) and the second chamber (17) is located substantially in the space between the rotor / turbine assembly (11) and the stator (12). Pump (10) according to any one of the preceding claims, characterized in that