DESC:FIELD
The present invention relates to the field of pumps.
BACKGROUND
Conventionally, lubricating oil is circulated through the engine by a pump submerged inside an oil tank. The oil tank is typically attached at the bottom of the engine assembly. Typically, the pump is driven by a chain drive through a sprocket installed on the shaft of the pump as well as a sprocket on the engine shaft. With a chain drive torque transfer obtained is often very rough, and hence noisy, as the chain drive connects the engine shaft and the pump shaft which are spaced apart by a considerably larger distance. Moreover, a chain drive is less effective in transmitting torque, as the torque transmitted is dependent on the meshing of the chain with the sprocket. Additionally, adequate tension is required to be maintained in the chain drive to ensure effective torque transfer, and ensuring effective torque transfer needs maintenance at regular intervals.
There is, therefore, felt a need to provide a pump system to overcome the above mentioned problem.
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 pump system for an engine;
Another object of the present disclosure is to provide a pump system that offers increased effectiveness in transferring torque;
Still another object of the present disclosure is to provide a pump system that offers reduction in noise level; and
Yet another object of the present disclosure is to provide a pump system that ensures effective meshing between the power transfer components.
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 pump system for circulating lubrication oil through an IC engine. The pump system comprises a pump shaft and a pump gear mounted on an operative end of the pump shaft. The pump gear is meshed with a driving gear mounted on a driving shaft of the engine.
Typically, the driving shaft is typically a camshaft of the engine.
Typically, the driving gear is typically a worm gear and the pump gear is typically a worm wheel.
Typically, the pump system further comprises a pump housing, a pump casing, an inlet and an outlet. The pump housing houses the pump shaft. The pump casing is fastened to the pump housing and encloses a G-rotor pump. The inlet is provided at the operative lower end of pump casing and the outlet is provided at the operative lower end of pump casing.
Typically, the pump casing is fastened to the pump housing using a plurality of fasteners and a spring-retainer arrangement.
Typically, the inlet is provided with a strainer attached on its operative end.
LIST OF REFERENCE NUMERALS
10 – pump gear
12 – pump shaft
20 – pump housing
30 –pump casing
40 – fasteners
50 – inlet
60 – outlet
100 – pump system
110 – driving gear
112 – driving shaft
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
The pump system of the present disclosure will now be described with the help of the accompanying drawing, in which:
Figure 1 shows an isometric view of an assembly of a pump system, in accordance with an embodiment of the present disclosure;
Figure 2 shows an exploded view of the pump system of figure 1;
Figure 2 shows a front view of the pump system of figure 1;
Figure 4 shows a side view of the pump system of Figure 1;
Figure 5 shows an isometric view of assembly of a pump gear with a pump shaft; and
Figure 6 shows an isometric view of assembly of a driving gear with a driving shaft.
DETAILED DESCRIPTION
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, steps, operations, elements, modules, units and/or components, but do not forbid the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The particular order of steps disclosed in the method and process of the present disclosure is not to be construed as necessarily requiring their performance as described or illustrated. It is also to be understood that additional or alternative steps may be employed.
When an element is referred to as being “mounted on”, “engaged to”, “connected to” or “coupled to” another element, it may be directly on, engaged, connected or coupled to the other element. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed elements.
Terms such as “inner”, “outer”, “beneath”, “below”, “lower”, “above”, “upper” and the like, may be used in the present disclosure to describe relationships between different elements described.
Referring to Figures 1-6 a pump system 100 is shown which comprises a pump gear 10 mounted on an operative end of a pump shaft 12. Since the pump gear 10 is a driven gear, the pump gear 10 is meshed with a driving gear 110 mounted on a driving shaft 112. The driving shaft 112 is typically a camshaft of an internal combustion engine (not shown in figure specifically). The driving gear 110 is typically a worm gear while the pump gear 10 which is the driven gear is typically a worm wheel. The worm and worm wheel facilitate enhanced torque transfer at low speed as well as less noisy operation of the pump system. Thus, elimination of a conventional sprocket and chain drive facilitates ease of assembly of pump system 100 components. Also the worm and the worm wheel occupy less space as compared to other gear drives, thus facilitating ease of packaging pump system 100 components inside the engine. In addition to this, the worm and the worm wheel further eliminates cost of assembly as less components are needed, reduces overall weight of the pump system 100 and thereby reduces assembly time. Still further, the worm and the worm wheel permit torque transfer in only one direction of rotation, thereby restricting torque transfer in an opposite direction which provides a safety measure for the pump 100. Lastly, the meshing effectiveness obtained with a worm and worm wheel arrangement surpasses a chain drive with a sprocket by a significant margin.
The pump system 100 further comprises a pump housing 20 configured to receive said pump shaft 12 from a first end 20a. The housing 20 is configured to partially receive a fluid pump 05 from a second end 20b. A pump casing 30 is fastened at the second end 20b of the pump housing 20 and encloses the fluid pump 05. The fluid pump 05 may be a G-rotor pump. Further the pump casing 30 is provided with an inlet 50 and an outlet 60 thus providing a passage for handling a pumping fluid. The pump casing 30 is fastened to the pump housing 20 with the help of a plurality of fasteners 40 and spring-retainer arrangement. The inlet 50 has a strainer attached on its operative end to ensure fluid handling without any particulate matter so as to avoid any pump blockages. The pump system 100 typically is installed on a bottom portion of the engine assembly (not shown) as the oil sump is located at a bottom portion of the engine assembly. This arrangement results in a considerably larger span between the engine camshaft and the pump shaft. As opposed to a conventional chain drive and sprocket arrangement, the present disclosure pump system 100 comprises the pump shaft 12 which facilitates power transfer from the engine cam shaft to the pump shaft. Thus, meshing takes place near the engine camshaft end and not near the pump shaft 12, which thereby enhances the meshing effectiveness. In addition to this, the geared arrangement of the present disclosure facilitates consistent gear meshing between the driving gear and the driven gear. Through the pump system 100 of the present disclosure, oil is distributed to the galleries of the engine assembly which is dependent on the camshaft rotation speed.
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.
TECHNICAL ADVANCEMENTS
The present disclosure described herein above has several technical advantages including, but not limited to, the realization of pump system that:
• offers increased effectiveness in transmitting torque;
• offers reduction in noise level; and
• ensures effective meshing between the power transfer components.
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.
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 disclosure to achieve one or more of the desired objects or results.
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 pump system (100) for circulating lubrication oil through an IC engine, said pump system (100) comprising:
• a pump shaft (12);
• a pump housing (20) partially enclosing said pump shaft (12), said pump housing (20) configured to receive said pump shaft (12) from a first end (20a) while the second end (20b) of said housing (20) is configured to partially receive a fluid pump (05), said fluid pump (05) coupled to the enclosed end of the pump shaft (12);
• a pump drive gear (10) coupled at the exposed end of the pump shaft (12) near the first end (20a) of said housing (20); and
• a pump casing (30) fastened at the second end of said pump housing (20) and thereby providing a space for enclosing said fluid pump (05);
wherein the pump drive gear (10) is meshed with the driving gear (110) of an IC engine for transfer of power form driving shaft of the engine to the pump shaft (12).
2. The pump system (100) as claimed in claim 1, wherein the driving shaft (112) is typically a camshaft of the engine.
3. The pump system (100) as claimed in claim 1, wherein the driving gear (110) is typically a worm gear and the pump gear (10) is typically a worm wheel.
4. The pump system (100) as claimed in claim 1, further comprises an inlet (50) and an outlet (60) provided at the operative lower end of pump casing (30) for providing a passage for handling a pumping fluid.
5. The pump system (100) as claimed in claim 4, wherein the pump casing (30) is fastened to the pump housing (20) using a plurality of fasteners (40) and a spring-retainer arrangement.
6. The pump system (100) as claimed in claim 4, wherein the inlet (50) is provided with a strainer attached on its operative end.