DESC:FIELD
The present disclosure relates to a water pump. More particularly, the present disclosure relates to a submersible pump.
BACKGROUND
The background information herein below relates to the present disclosure but is not necessarily prior art.
A submersible pump is generally configured to extract water from deep wells. When the pumps are in use the entire pump unit submerges into the water in order to bring underground water to the surface.
The conventional submersible pump typically consists of two main components: a motor casing and a water casing. The motor casing houses a motor with a shaft and is supported by a pair of bush bearings. These bearings are positioned on the shaft to support the motor within the motor casing during operation. Additionally, each side of the motor is provided with a thrust pad. The thrust pads are mounted on the shaft. These thrust pads are located in a space between the motor's armature and the operative end of the bush bearings.
However, since the thrust pad assembly and the bush bearings have high surface area contact, consequently, this leads to increased friction, resulting in output power loss and decreases in the pump's efficiency. The rise in friction also causes the motor to overheat during operation and as a result, affects its durability.
Furthermore, the increased friction causes the bush bearings to degrade more quickly, leading to premature failure. This not only increases the expenses associated with repair and maintenance but also results in downtime for the pump.
Additionally, due to the relatively long length of the bush bearings, larger fixtures are required to hold them, thereby adding to the overall weight of the pump and making the pump heavy and bulky. The conventional submersible pumps are specifically installed vertically in a borewell. Such pumps may have many disadvantages over horizontally oriented pump. Vertical submersible pumps often have limitations in handling large volumes of fluid compared to horizontal pumps, which can be designed to handle higher flow rates with greater efficiency in some applications. Vertical submersible pumps, especially those in wells, may be more prone to damage from debris, sand, or sediment entering the well and clogging the pump. Vertical submersible pumps are more prone to vibrations, especially in high-speed operations as compared to horizontal pumps which due to their wider base, tend to be more stable. Further, vertical pump components experiences higher thrust loads due to pump orientation and hydraulic forces, thus requiring larger, more expensive thrust bearings needed to manage these loads. Increased wear on thrust bearings, leads to frequent maintenance or replacement.
Therefore, there is felt a requirement for a submersible pump that alleviates the aforementioned drawbacks.
OBJECTS
Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows:
It is an object of the present disclosure to ameliorate one or more problems of the prior art or to at least provide a useful alternative.
An object of the present disclosure is to provide a submersible pump.
Another object of the present disclosure is to provide a submersible pump that reduces the induced friction.
Still another object of the present disclosure is to provide a submersible pump that reduces overheating of the submersible pump during operation.
Yet another object of the present disclosure is to provide a submersible pump that prolongs the lifespan of the bearing.
Yet another object of the present disclosure is to provide a submersible pump that reduces repair and maintenance costs.
Still another object of the present disclosure is to provide a submersible pump that decreases downtime.
Yet another object of the present disclosure is to provide a submersible pump with an optimized weight and size.
Still another object of the present disclosure is to provide a submersible pump that has an improved performance and enhanced efficiency.
Yet another object of the present disclosure is to provide a submersible pump that enhances user experience.
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 provides a submersible pump having a motor casing and a water casing. The submersible pump comprises a first bracket and a second bracket. The first bracket is secured to a first operative end of the motor casing and the second bracket is secured between a second operative end of the motor casing and the water casing. A hollow space is defined between the first bracket and the second bracket to receive a motor configured with an axial rotary shaft. Further, the Pump includes a first axial cavity in the first bracket and a second axial cavity in the second bracket. The first axial cavity and the second axial cavity are configured to accommodate the rotary shaft. Furthermore, a first ball bearing is positioned within the first axial cavity and a second ball bearing is positioned within the second axial cavity, the first ball bearing and the second ball bearing support the rotary shaft and enable free rotation of the rotary shaft.
In an embodiment, the axial rotary shaft is defined by a first portion and a second portion, the first portion of the shaft is supported on the first ball bearing and the second portion of the shaft is supported on the second ball bearing.
In an embodiment, the second portion of the shaft protrudes through the second ball bearing and through the second bracket into the water casing to mount an impeller.
In an embodiment, the first bracket is provided with a breather diaphragm assembly to close the first axial cavity of the first bracket.
In an embodiment, the breather diaphragm assembly is configured to maintain pressure inside the motor casing in the range of 0.4 kg/cm2 to 1.3 kg/cm2 during the operative condition of the submersible pump.
In an embodiment, an oil sealing is provided in the second bracket to prevent leakage of water through the second bracket within the motor casing.
In an embodiment, the first bracket and the second bracket is mounted on the motor casing by means of a plurality of fastening means.
In an embodiment, the first bracket and the second bracket are connected by means of at least one tie-rod.
In an embodiment, the submersible pump is horizontally installed and has applicability in an open well, the pump is also operated at a lower depth in the range of 5 meters to 10 meters without any leakage.
In an embodiment, a solar pumping system with a variable frequency drive (VFD) is optionally used to operate the submersible pump.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
A submersible pump, of the present disclosure will now be described with the help of the accompanying drawing in which:
Figure 1 illustrates a perspective sectional constructional view of a traditional or conventional submersible pump.
Figure 2 illustrates a perspective sectional constructional view of a submersible pump in accordance with an embodiment of the present disclosure.
LIST OF REFERENCE NUMERALS
100' conventional submersible pump
100 submersible pump of the present disclosure
10 bush bearing
12 thrust pad
14 fixture
16 motor casing
18 water casing
20 rotary shaft
20a first extreme portion of the shaft
20b second extreme portion of the shaft
22 first ball bearing
24 second ball bearing
26 first bracket
28 second bracket
30 impeller
32 tie rod
34 fastening means
36
38 breather diaphragm assembly
motor

DETAILED DESCRIPTION
The present disclosure relates to the field of water pumps. More particularly, the present disclosure relates to a submersible pump.
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,” 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.
The terms first, second, third, etc., should not be construed to limit the scope of the present disclosure as the aforementioned terms may be only used to distinguish one element, component, region, layer, or section from another component, region, layer, or section. Terms such as first, second, third, etc., when used herein do not imply a specific sequence or order unless clearly suggested by the present disclosure.
Typically, a submersible pump (100’) consists of two main components: a motor casing (16) and a water casing (18). The motor casing (16) accommodates a motor along with a shaft (20) and is supported by a pair of bush bearings (10). These bearings are positioned on the shaft (20) and serve to support the motor within the motor casing (16) during operation. Additionally, on each side of the motor, there is a thrust pad (12) mounted on the shaft (20). These thrust pads (12) are located in a space between the motor's armature and the operative end of the bush bearings (10). Figure 1 illustrates a perspective sectional constructional view of a traditional or conventional submersible pump. However, since the thrust pad (12) assembly and the bush bearings (10) have high surface area contact, consequently, this leads to increased friction, resulting in output power loss and a decrease in the pump's efficiency. The rise in friction also causes the motor to overheat during operation.
Furthermore, the increased friction causes the bush bearings (10) to degrade more quickly, leading to premature failure. This not only increases the expenses associated with repair and maintenance but also results in downtime for the pump.
Additionally, due to the relatively long length of the bush bearing (10), larger fixtures (14) are required to hold them, thereby adding to the overall weight of the pump and making the pump heavy and bulky.
The present disclosure provides a submersible pump (100) with enhanced efficiency and reduced frictional losses. The present disclosure will now be described in detail with reference to Figures 1 through Figure 2. The present embodiment does not limit the scope and ambit of the present disclosure.
Figure 1 illustrates a conventional submersible pump (100’) configured with a bush bearing and a thrust pad, whereas Figure 2 illustrates a perspective sectional constructional view of a submersible pump (100) in accordance with an embodiment of the present disclosure.
The submersible pump (100) includes a motor casing (16) and a water casing (18). The submersible pump (100) comprises a first bracket (26) and a second bracket (28). The first bracket is secured to a first operative end of the motor casing (16) and the second bracket (28) is secured between a second operative end of the motor casing (16) and the water casing (18). The second bracket is sandwiched between the motor casing (18) and the water casing (18). Further, a hollow space is defined between the first bracket (26) and the second bracket (28) to receive a motor (38). The motor is configured with an axial rotary shaft (20).
Furthermore, in the submersible pump (100), a first axial cavity is provided in the first bracket (26) and a second axial cavity is provided in the second bracket (28). The first cavity and the second cavity are configured to accommodate the extended portion of the rotary shaft (20).
In an embodiment, a first ball bearing (22) positioned within the first axial cavity and a second ball bearing (24) positioned within the second axial cavity, the first ball bearing (22) and the second ball bearing (24) support the rotary shaft (20) and enable free rotation of the rotary shaft (20)
In an embodiment, the axial rotary shaft (20) is defined by a first portion (20a) and a second portion (20b). The first portion (20a) of the axial rotary shaft (20) is supported on the first ball bearing (22) located in the first axial cavity. The second portion (20b) of the axial rotary shaft (20) is supported on the second ball bearing (24) located in the second axial cavity.
In an embodiment, the second portion (20b) of the axial rotary shaft (20) extends through the second cavity and the second bracket into the water casing (18). This extended second portion (20b) of the shaft (20) enables the mounting of an impeller positioned in the water casing (18). In a conventional submersible pump, a separate rotary shaft is configured for mounting an impeller and the motor and then both shafts are coupled together using a coupler. However, in the submersible pump (100) of the present disclosure, a mono shaft is installed to mount the motor (38) and the impeller (30) without the use of any coupling element.
Further, the second extreme portion (20b) of the shaft (20), upon protruding through the second bracket (28), is configured to mount an impeller (30). The operative portion of the second bracket (28) is configured to support and secure the water casing (18), effectively enclosing the impeller (30).
In an embodiment, the first bracket (26) is provided with a breather diaphragm assembly (36) to close the first cavity of the first bracket (26). The breather diaphragm assembly (36) maintains the optimum pressure range inside the motor casing (16) during the operative condition of the pump.
In an embodiment, the pressure inside the motor casing is maintained in the range of 0.4 kg/cm2 to 1.3 kg/cm2 using the breather diaphragm assembly (36).
In an embodiment, an oil sealing is provided in the second bracket (28) to prevent leakage of water through the second bracket (28) within the motor casing (16).
In an embodiment, the first bracket (26) and the second bracket (28) are mounted to the motor casing (16) by means of a plurality of fastening means (34).
In an embodiment, the first bracket (26) and the second bracket (28) are connected by means of at least one tie-rod (32).
The motor (38) configured in the motor casing is provided with a cooling arrangement to mitigate the motor's overheating.
In an embodiment, the motor (38) is provided with an oil-based cooling.
In another embodiment, the motor (38) is provided with a water-based cooling.
In an embodiment, the submersible pump in accordance with the present disclosure can be installed in an open well. Preferably, the pump (100) is horizontally installed in the open well. In a horizontal pump, the axial thrust load on bearings is generally lower compared to vertical pumps. Hence, larger thrust bearings are not required. These are also practical and cost-effective for shallow installations. Further, the pump advantageously operated at a lower depth in the range of 5 meters to 10 meters without any leakage.
Advantageously, since, the pair of bush bearings (10) of the conventional submersible pump (100’) is replaced with the pair of ball bearings (22, 24) in the submersible pump (100) of the present disclosure, resulting in comparatively reduced friction within the matting part of the pump (100). Further, the conventional submersible pump (100’) requires a relatively larger cavity or fixture (14) to hold the bush bearings (10), while the submersible pump (100) in the present disclosure needs no such provision for holding the ball bearings (22, 24). This configurational difference contributes to a reduction in the overall weight of the submersible pump (100). In addition, due to the lower induced friction, the pump (100) operates with higher efficiency compared to the conventional pump (100’).
The conventionally used bush bearings (10), thrust pads (12), and inter-related components such as Fiber Plate, Bearing Bush, Dowel Pin, Grommet, and Cable Cover are replaced in the submersible pump (100) with the first ball bearing and the second ball bearing. This replacement of conventional components with ball bearings saves the inventory.
In an embodiment, the inventory can be saved in the range between 10% - 22% and as a result, reduces the weight of the pump (100) in the range of 2.5%-3.5%.
In addition, the thrust pad (12) of the conventional submersible pump (100’) is eliminated, therefore the submersible pump (100) of the present disclosure becomes compact and comparatively lighter.
In an embodiment, the submersible pump (100) of the present disclosure can save space (L*W*H (in mm)) in the range (9.5% - 12.5%) * (10% - 13%) * (2% - 4%).
Further, due to the usage of the bush bearings (10) in the conventional submersible pump (100’), there is a more demand for starting torque which in turn increases the starting voltage for the pump (100’). However, in the pump (100) ball bearings are used instead of bush bearings (22, 24). Therefore, the submersible pump (100) of the present disclosure is operated at a lower voltage and consumes less power.
In an embodiment, the submersible pump (100) is operated at a voltage in a range between 160 Volts - 260 Volts. In an embodiment, the submersible pump (100) of is operated at a reduced current limit of up to 8%. Since the bush bearing (10) has been replaced with the ball bearing (22, 24), the pump (100) requires less maintenance, thereby lowering repair costs. Furthermore, it eliminates the need for specialized knowledge or skills during assembly, which shortens the assembly time for the pump (100).
In an embodiment, the submersible pump (100) offers a reduction in assembly time in the range of 4% to 5%.
In an embodiment, the submersible pump (100) offers a reduction in disassembly time in the range of 3% to 8%.
In an embodiment, the submersible pump (100) is repaired in less time than the conventional pump, the repairing time can be reduced in the range of 3% to 5%.
In an embodiment, a solar pumping system with a variable frequency drive (VFD) is optionally used to operate the submersible pump (100).
In an embodiment, the submersible pump is an open well submersible pump with the oil field motor and the ball bearing arrangement.
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, a submersible pump, that;
• provides enhanced efficiency;
• reduces the induced friction;
• operated reduced overheating;
• can prolong the lifespan of the bearing;
• reduces repair and maintenance costs;
• operated with decreased downtime;
• having an optimized weight and size; and
• provides improved performance.
• is more resistant to debris and sediment damage.
The foregoing description of the specific embodiments so fully reveals 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.
Throughout this specification the word “comprise”, or variations such as “comprises” or “comprising, will be understood to imply the inclusion of a stated element, integer or step,” or group of elements, integers, or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.
The use of the expression “at least” or “at least one” suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the invention to achieve one or more of the desired objects or results. While certain embodiments of the inventions have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the inventions. Variations or modifications to the formulation of this invention, within the scope of the invention, may occur to those skilled in the art upon reviewing the disclosure herein. Such variations or modifications are well within the spirit of this invention. The numerical values given for various physical parameters, dimensions, and quantities are only approximate values and it is envisaged that the values higher than the numerical value assigned to the physical parameters, dimensions, and quantities fall within the scope of the invention unless there is a statement in the specification to the contrary.
While considerable emphasis has been placed herein on the specific features of the preferred embodiment, it will be appreciated that many additional features can be added and that many changes can be made in the preferred embodiment without departing from the principles of the disclosure. These and other changes in the preferred embodiment 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.
The economy significance details requirement may be called during the examination. Only after filing this Patent application, the applicant can work publicly related to the present disclosure product/process/method. The applicant will disclose all the details related to the economic significance contribution after the protection of the invention. ,CLAIMS:WE CLAIM:
1. A submersible pump (100) having a motor casing (16) and a water casing (18), said submersible pump (100) comprising:
• a first bracket (26) secured to a first operative end of said motor casing (16);
• a second bracket (28) secured between a second operative end of said motor casing (16) and said water casing (18);
• a hollow space defined between said first bracket (26) and said second bracket (28) to receive a motor (38) configured with an axial rotary shaft (20);
• a first axial cavity in said first bracket and a second axial cavity in said second bracket configured to accommodate said rotary shaft (20);
• a first ball bearing (22) positioned within said first axial cavity and a second ball bearing (24) positioned within said second axial cavity, said first ball bearing and said second ball bearing support said rotary shaft (20) and enable free rotation of said rotary shaft (20).
2. The submersible pump (100) as claimed in claim 1, wherein said axial rotary shaft (20) is defined by a first portion (20a) and a second portion (20b), said first portion (20a) of said shaft (20) is supported on said first ball bearing (22) and said second portion (20b) of said shaft (20) is supported on said second ball bearing (24).
3. The submersible pump (100) as claimed in claim 1, wherein said second portion (20b) of the said shaft (20) protrudes through said second ball bearing (24) and through said second bracket (28) into said water casing (18) to mount an impeller (30).
4. The submersible pump (100) as claimed in claim 1, wherein said first bracket (26) is provided with a breather diaphragm assembly (36) to close said first axial cavity of said first bracket (26).
5. The submersible pump (100) as claimed in claim 1, wherein said breather diaphragm assembly (36) is configured to maintain pressure inside said motor casing (16) in the range of 0.4 kg/cm2 to 1.3 kg/cm2 during the operative condition of said submersible pump (100).
6. The submersible pump (100) as claimed in claim 1, wherein an oil sealing is provided in said second bracket (28) to prevent leakage of water through said second bracket (28) within said motor casing (16).
7. The submersible pump (100) as claimed in claim 1, wherein said first bracket (26) and said second bracket (28) is mounted on said motor casing (16) by means of a plurality of fastening means (34).
8. The submersible pump (100) as claimed in claim 1, wherein said first bracket (26) and said second bracket (28) are connected by means of at least one tie-rod (32).
9. The submersible pump (100) as claimed in claim 1 is horizontally installed and has applicability in an open well, said pump (100) is also operated at a lower depth in the range of 5 meters to 10 meters without any leakage.
10. The submersible pump (100) as claimed in claim 1, wherein a solar pumping system with a variable frequency drive (VFD) is optionally used to operate said submersible pump (100).
Dated this 09th day of September, 2024

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

TO,
THE CONTROLLER OF PATENTS
THE PATENT OFFICE, MUMBAI