Description:FIELD
The present disclosure relates to submersible pump sets.
BACKGROUND
The background information herein below relates to the present disclosure but is not necessarily prior art.
Submersible pump sets conventionally use gun metal bushes positioned at every impeller stage of the pump set. The conventional gun metal bush has a tubular configuration with a cylindrical aperture configured along its central axis. A plurality of grooves is configured along the circumference of the aperture to allow a cooling medium of the pump set to pass therethrough. However, it has been observed over the period of time that the conventional bushes have several limitations when used in submersible pumps operating in extremely sandy water conditions. More specifically, the conventional gun metal bushes are not specifically designed to flush sand particles carried through the cooling medium. As a result, they are less effective at preventing sand particles from entering the pump's internal components, leading to wear and tear on the pump. Further, being made of gun metal, these bushes are not wear-resistant. All these reasons and the small surface area of the grooves, these bushes can easily be clogged with sand particles, thereby increasing wear and tear on the pump's internal components. This can result in decreased efficiency and a shorter lifespan of the pump set. This can result in decreased durability and increased maintenance costs.
There is therefore felt a need for a pump set that alleviates the aforementioned drawbacks.
OBJECTS
Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows:
An object of the present disclosure is to provide a submersible pump set.
Another object of the present disclosure is to provide a submersible pump set which is protected from wear and tear that occurs as a result of sandy waters.
Yet another object of the present disclosure is to provide a pump set which has relatively increased efficiency and durability.
Other objects and advantages of the present disclosure will be more apparent from the following description, which is not intended to limit the scope of the present disclosure.
SUMMARY
The present disclosure envisages a submersible pump set having at least one impeller and a cylindrical drive shaft. The pump set comprises a sand fighting device configured to be provided in each impeller. The sand fighting device is defined by a tubular body having a hexagonal aperture configured along an operative central longitudinal axis of the body for receiving the shaft therein. The sand fighting device is configured to facilitate turbulent flow of the cooling medium through a gap defined between the circumference of the cylindrical shaft and circumference of the hexagonal aperture to enable removal of foreign particulates contained in the cooling medium.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
A submersible pump set of the present disclosure will now be described with the help of the accompanying drawing, in which:
Figure 1 illustrates a cross-sectional view of an oil-filled submersible pump set with its corresponding motor;
Figure 2 illustrates a cross-sectional view of a water-filled submersible pump set with its corresponding motor;
Figure 3 illustrates a cross-sectional front view of the pump set;
Figure 4 illustrates an isometric view of a sand fighting device of the pump set of the present disclosure;
Figure 5 illustrates a cross-sectional top view the device of Figure 4;
Figure 6 illustrates an isometric view of a conventionally used bush;
Figure 7 illustrates a cross-sectional top view of the bush of Figure 6.
LIST OF REFERENCE NUMERALS
1000 pump set
10 impeller
20 drive shaft
50 conventional bush
53 aperture of the conventional device
55 groove
100 sand fighting device
105 body
110 aperture
112 gap
115 collar
200, 300 motor
DETAILED DESCRIPTION
Embodiments, of the present disclosure, will now be described with reference to the accompanying drawing.
Embodiments are provided so as to thoroughly and fully convey the scope of the present disclosure to the person skilled in the art. Numerous details are set forth, relating to specific components, and methods, to provide a complete understanding of embodiments of the present disclosure. It will be apparent to the person skilled in the art that the details provided in the embodiments should not be construed to limit the scope of the present disclosure. In some embodiments, well-known processes, well-known apparatus structures, and well-known techniques are not described in detail.
The terminology used, in the present disclosure, is only for the purpose of explaining a particular embodiment and such terminology shall not be considered to limit the scope of the present disclosure. As used in the present disclosure, the forms “a”, “an” and “the” may be intended to include the plural forms as well, unless the context clearly suggests otherwise. The terms “comprises”, “comprising”, “including”, “includes” and “having” are open-ended transitional phrases and therefore specify the presence of stated features, elements, modules, units and/or components, but do not forbid the presence or addition of one or more other features, elements, components, and/or groups thereof.
Submersible pump sets conventionally use devices such as gun metal bushes positioned at every impeller stage of the pump set. The conventional gun metal bush (50) (as seen in Figure 6 and Figure 7) has a tubular configuration with a cylindrical aperture (53) configured along its central axis. A plurality of grooves (55) are configured along the circumference to allow a cooling medium of the pump set to pass therethrough. However, it has been observed over the period of time that the conventional bushes have several limitations when used in submersible pumps operating in extremely sandy water conditions. More specifically, the conventional gun metal bushes (50) are not specifically designed to flush sand particles carried through the cooling medium. As a result, the conventional gun metal bushes are less effective at preventing sand particles from entering the pump's internal components, leading to wear and tear on the pump. Further, being made of gun metal, these bushes (50) are not wear-resistant. All these reasons and the small surface area of the grooves, these bushes can easily be clogged with sand particles, thereby increasing wear and tear on the pump's internal components. This can result in decreased efficiency and a shorter lifespan for the pump set (1000). This can result in decreased durability of the pump set (1000) and increased maintenance costs.
A submersible pump set (1000) of the present disclosure will now be described in detail with reference to Figure 1 through Figure 5. The pump set (1000) includes at least one impeller (10) and a cylindrical drive shaft (20), apart from the motor. The pump set (1000) comprises a sand fighting device (100) configured to be provided in each impeller (10). The sand fighting device (100) is defined by a tubular body (105) having a hexagonal aperture (110) configured along an operative central longitudinal axis of the body (105) for receiving the shaft (20) therein. The sand fighting device (100) is configured to facilitate turbulent flow of the cooling medium through a gap (112) defined between the circumference of the cylindrical shaft (20) and circumference of the hexagonal aperture (110) to enable removal of foreign particulates contained in the cooling medium.
In an embodiment, the pump set (1000) is an oil-filled submersible pump set (as shown in Figure 1).
In another embodiment, the pump set (1000) is a water-filled submersible pump set (as shown in Figure 2).
In an embodiment, the cooling medium of the pump set (1000) is water.
In an operative configuration of the device (100), a pump set (1000) having four impeller stages is considered which means four devices (100) (of the present disclosure) for each impeller stage. The operating condition involves extremely sandy water conditions. Water containing sand particles is drawn into the pump through the inlet, where it encounters the first device (100). The turbulent flow created by the bush effectively removes the sand particles, preventing them from entering the pump's internal components and damaging them. As the water passes through each subsequent devices (100), any remaining sand particles is removed, resulting in cleaner water that is free of sand particles.
The device (100) can be used for operation in extremely sandy water conditions. Removing the sand particles helps reduce the downtime and maintenance costs associated with pump failure caused by sand particles.
In an embodiment, a collar (115) is configured on an operative first surface of the body (105). The collar (115) is configured to be seated on an operative base of the impeller (10) to facilitate attachment of the body (105) with the impeller (10).
In an embodiment, the dimension of the apothem of the hexagonal aperture (110) is equal to the radius of the pump shaft (20).
In an embodiment, the device (100) is of nitrile-butadiene rubber which is a highly wear-resistant material that ensures that the pump remains reliable even in harsh operating conditions.
The device (100) not only helps in removing the foreign particulates contained in water but also improves the heat transfer between the components of the pump set (1000) and the cooling medium. The efficiency of the pump set (1000) and durability also increases as the foreign particulates such as sand is effectively removed which in turn causes less wear and tear of the components of the pump set.
In an embodiment, the pump set (1000) is employed for bore sizes of 200mm and more.
The present disclosure is further described in light of the following experiments which are set forth for illustration purpose only and not to be construed for limiting the scope of the disclosure. The following experiments can be scaled up to industrial/commercial scale and the results obtained can be extrapolated to industrial scale.
Example:
An observational study was conducted to compare the working of a pump set (1000) fitted with conventional sand fighting arrangements and a pump set (1000) fitted with the device (100) of the present disclosure in an extremely sandy water environment. The pump set (1000) with the conventional arrangement had to be sand flushed before installation, and therefore required additional expenses and time. Yet, it was observed that the pup set (1000) fitted with conventional sand fighting arrangements was damaged within just 15 days of operation due to the massive amounts of sand retained in the bore.
On the other hand, the pump set (1000) fitted with the device (100) did not require any kind of sand flushing or pre-installation procedures, thereby saving time and expenses. The device (100) allowed the pump set (1000) to continue working without any flaw till date.
The foregoing description of the embodiments has been provided for purposes of illustration and not intended to limit the scope of the present disclosure. Individual components of a particular embodiment are generally not limited to that particular embodiment, but, are interchangeable. Such variations are not to be regarded as a departure from the present disclosure, and all such modifications are considered to be within the scope of the present disclosure.
TECHNICAL ADVANCEMENTS
The present disclosure described hereinabove has several technical advantages including, but not limited to, the realization of a submersible pump set which:
• is protected from wear and tear that occurs as a result of sandy waters;
• has relatively improved heat dissipation rate;
• has relatively reduced maintenance cost; and
• has relatively increased efficiency and durability especially in sandy water.
The foregoing disclosure has been described with reference to the accompanying embodiments which do not limit the scope and ambit of the disclosure. The description provided is purely by way of example and illustration.
The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
The foregoing description of the specific embodiments so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.
Any discussion of materials, devices, articles or the like that has been included in this specification is solely for the purpose of providing a context for the disclosure. It is not to be taken as an admission that any or all of these matters form a part of the prior art base or were common general knowledge in the field relevant to the disclosure as it existed anywhere before the priority date of this application.
The numerical values mentioned for the various physical parameters, dimensions or quantities are only approximations and it is envisaged that the values higher/lower than the numerical values assigned to the parameters, dimensions or quantities fall within the scope of the disclosure, unless there is a statement in the specification specific to the contrary.
While considerable emphasis has been placed herein on the components and component parts of the preferred embodiments, it will be appreciated that many embodiments can be made and that many changes can be made in the preferred embodiments without departing from the principles of the disclosure. These and other changes in the preferred embodiment as well as other embodiments of the disclosure will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation. , Claims:WE CLAIM:
1. A submersible pump set (1000) having a cooling medium, at least one impeller (10) and a cylindrical drive shaft (20), said submersible pump set (1000) comprising a sand fighting device (100) configured to be provided in each impeller (10), said sand fighting device (100) defined by a tubular body (105) having a hexagonal aperture (110) configured along an operative central longitudinal axis of said body (105) for receiving said shaft (20) therein, said sand fighting device (100) configured to facilitate turbulent flow of the cooling medium through a gap (112) defined between the circumference of the cylindrical shaft (20) and circumference of said hexagonal aperture (110) to enable removal of foreign particulates contained in the cooling medium.
2. The pump set (1000) as claimed in claim 1, wherein said pump set (1000) is an oil-filled submersible pump set.
3. The pump set (1000) as claimed in claim 1, wherein said pump set (1000) is a water-filled submersible pump set.
4. The pump set (1000) as claimed in claim 1, wherein a collar (115) is configured on an operative first surface of said body (105), said collar (115) being configured to be seated on an operative base of said impeller (10) to facilitate attachment of said body (105) with the impeller (10).
5. The pump set (1000) as claimed in claim 1, wherein the dimension of the apothem of the hexagonal aperture (110) is equal to the radius of the pump shaft (20).
6. The pump set (1000) as claimed in claim 1, wherein said device (100) is of nitrile-butadiene rubber.

7. The pump set (1000) as claimed in claim 1, which is used for bore size of 200mm or more.

Dated this 8th day of August, 2023

_______________________________
MOHAN RAJKUMAR DEWAN, IN/PA – 25
of R.K.DEWAN & CO.
Authorized Agent of Applicant

TO,
THE CONTROLLER OF PATENTS
THE PATENT OFFICE, AT MUMBAI