Claims:We claim:
1. A system 100 for preventing dry run of a hydraulic pump 111 in a heavy machinery wherein the hydraulic pump 111 is driven by an engine 109 of the heavy machinery, the system 100 comprising:
a valve 103 coupled to a path carrying oil from a tank 101 comprising hydraulic oil, wherein the valve 103 operates between a first position and a second position;
an activation switch 105 connected to the valve 103, wherein the activation switch 105 is driven into one of ON position and OFF position, when the valve 103 is in the first position and the second position respectively; and
an engine oil solenoid 107 interfaced with the activation switch 105, wherein the engine oil solenoid 107 is activated when the activation switch 105 is in ON position and the engine oil solenoid 107 is deactivated when the activation switch 105 is in OFF position to cut off fuel supply to the engine 109 to terminate operation of the engine.
2. The system 100 as claimed in claim 1, wherein the valve 103 is in first position when the hydraulic oil flows from the tank 101 through the valve 103.

3. The system 100 as claimed in claim 1, wherein the valve 103 is in second position when the hydraulic oil does not flow from the tank 101 through the valve 103.

4. The system 100 as claimed in claim 1, wherein the engine oil solenoid 107 is provided in fuel supply line between a fuel source and the engine 109.

5. The system 100 as claimed in claim 1, wherein the activation switch 105 is a limit switch.

6. The system 100 as claimed in claim 1, wherein the valve is a butterfly valve.

7. A method for preventing dry run of a hydraulic pump 111 in a heavy machinery wherein the hydraulic pump 111 is driven by an engine 109 of the heavy machinery, the method comprising:
coupling a valve 103 to an outlet of a tank 101 comprising hydraulic oil, wherein the valve 103 operates between a first position and a second position;
connecting an activation switch 105 with the valve 103, wherein the activation switch 105 is driven into one of ON position or OFF position, when the valve 103 is in the first position and the second position respectively;
activating an engine oil solenoid 107 interfaced with the activation switch 105 when the activation switch 105 is in ON position; and
deactivating the engine oil solenoid 107 when the activation switch 105 is in OFF position to cut off fuel supply to the engine 109 to terminate operation of the engine 109 for preventing dry run of the hydraulic pump 111.
8. The method as claimed in claim 7, wherein the first position of the valve 103 is when hydraulic oil flows from the tank 101 through the valve 103.

9. The method as claimed in claim 7, wherein the second position of the valve 103 is when the hydraulic oil does not flow from the tank 101 through the valve 103.

10. The method as claimed in claim 7 comprises connecting the engine oil solenoid 107 in fuel supply line between a fuel source and the engine 109.
, Description:TECHNICAL FIELD
The present subject matter is generally related to heavy machinery. Particularly but not exclusively to hydraulic pump employed in the heavy machinery. Further, embodiments of the disclosure disclose a method and a system for preventing dry run of a hydraulic pump in the heavy machinery.

BACKGROUND
Heavy machineries like cranes, earth movers, backhoe loaders, rippers, drilling machines and the like are employed with hydraulic pump to supply hydraulic oil for various mechanisms to perform the intended function. For example, to perform one or more actions like lifting and hoisting crane may be employed with hydraulic actuator which receives pressurized hydraulic oil from the hydraulic pump for its operation. Generally, hydraulic pumps in such machineries is driven by the engine of such machineries. The hydraulic pump may be coupled to an engine output shaft through a suitable mechanical coupling such that the engine powers the hydraulic pump. The hydraulic pump applies pressure to hydraulic oil for applying force to other parts of the heavy machinery to perform one or more actions. Sometimes, dry running of the hydraulic pump may occur when the hydraulic pump operates without adequate hydraulic oil. This may lead to a surge in pressure, flow or overheating that will instigate a hydraulic pump failure.
The dry running may occur when operators unintentionally leave the hydraulic pump running over a period after the pumping operation is complete. This continued operation after all pumping fluid has been transferred will create a dry run condition inside the pump, leading to damage from this lack of lubrication.

The present disclosure is directed to overcome one or more limitations stated above or any other limitation associated with the conventional arts.

The information disclosed in this background of the disclosure section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

SUMMARY

In one non-limiting embodiment of the disclosure, a system preventing dry run of a hydraulic pump in a heavy machinery is disclosed. The hydraulic pump is driven by an engine of the heavy machinery. The system comprises a valve coupled to a path carrying oil from a tank comprising hydraulic oil, wherein the valve operates between a first position and a second position. The system also comprises an activation switch which is connected to the valve. The activation switch is driven into one of ON position and OFF position, when the valve is in the first position and the second position respectively. The system comprises an engine oil solenoid interfaced with the activation switch, wherein the engine oil solenoid is activated when the activation switch is in ON position and the engine oil solenoid is deactivated when the activation switch is in OFF position to cut off fuel supply to the engine to terminate operation of the engine.

In an embodiment of the disclosure, the valve is in first position when the hydraulic fuel flows from the tank through the valve.

In an embodiment of the disclosure, the valve is in second position when the hydraulic fuel does not flow from the tank through the valve.
In another non-limiting embodiment of the disclosure, a method for preventing dry run of a hydraulic pump in a system is disclosed. The method comprises coupling a valve to an outlet of a tank comprising hydraulic oil, wherein the valve operates between a first position and a second position. Thereafter, the method comprises connecting an activation switch with the valve, wherein the activation switch is driven into one of ON position or OFF position, when the valve is in the first position and the second position respectively. Further, the method comprises activating an engine oil solenoid interfaced with the activation switch when the activation switch is in ON position and deactivating the engine oil solenoid when the activation switch is in OFF position to cut off hydraulic oil supply to the engine to terminate operation of the engine for preventing dry run of the hydraulic pump.

The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate exemplary embodiments and, together with the description, explain the disclosed principles. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system and/or methods in accordance with embodiments of the present subject matter are now described, by way of example only, and regarding the accompanying figures, in which:
Fig.1 shows an exemplary environment for preventing dry run of a hydraulic pump in a heavy machinery in accordance with some embodiments of the present disclosure.

Fig.2 shows a flowchart illustrating a method for preventing dry run of a hydraulic pump in a heavy machinery in accordance with some embodiments of the present disclosure.

It should be appreciated by those skilled in the art that any block diagrams herein represent conceptual views of illustrative systems embodying the principles of the present subject matter. Similarly, it will be appreciated that any flow charts, flow diagrams, state transition diagrams, pseudo code, and the like represent various processes which may be substantially represented in computer readable medium and executed by a computer or processor, whether such computer or processor is explicitly shown.

DETAILED DESCRIPTION
In the present document, the word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment or implementation of the present subject matter described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
While the disclosure is susceptible to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the drawings and will be described in detail below. It should be understood, however that it is not intended to limit the disclosure to the specific forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.
The terms “comprises”, “comprising”, “includes”, “including” or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a setup, device, or method that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or device or method. In other words, one or more elements in a system or apparatus proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or method.
The present disclosure relates to a method and a system for preventing dry run of a hydraulic pump in a heavy machinery like cranes and ripper. The system comprises a valve, an activation switch, an engine oil solenoid, an engine and a hydraulic pump. The hydraulic pump is driven by the engine. In an embodiment, the valve is coupled to a path carrying oil from a tank comprising hydraulic oil. As an example, the valve may be a butterfly valve. The valve may operate between a first position and a second position. The activation switch is connected to the valve. The activation switch is driven into ON position when the valve is first position and the activation switch is driven into OFF position, when the valve is in second position. The valve may be in first position when the hydraulic oil flows from the tank through the valve. The valve may be in second position when the hydraulic oil does not flow from the tank through the valve. The engine oil solenoid is interfaced with the activation switch, wherein engine oil solenoid is activated when activation switch is in ON position. The engine oil solenoid is deactivated when activation switch is in OFF position to cut off fuel supply to the engine to terminate operation of the engine and thereby preventing dry run of the hydraulic pump. In this manner in the present disclosure, dry run of the hydraulic pump is prevented.

Fig.1 shows an exemplary system for preventing dry run of a hydraulic pump in a heavy machinery in accordance with some embodiments of the present disclosure.

The system 100 may comprise a tank 101 for storing hydraulic oil, a valve 103, an activation switch 105, an engine oil solenoid 107, an engine 109 and a hydraulic pump 111. The hydraulic pump 111 may be used in heavy machineries like cranes, ripper and the like. The engine 109 of the heavy machineries may power the hydraulic pump 111 due to which the hydraulic oil from the tank 101 may be pressurised by the pump and supplied to various hydraulic actuators [not shown] in the heavy machinery to perform one or more functions. As an example, the one or more functions may be hoisting or lifting in case of cranes. As an example, the valve 103 may be a butterfly valve 103 or any other valve 103 which may operate in one of first position or second position. The valve 103 may be coupled to an outlet of the tank 101. The activation switch 105 may be a switch which may be driven into one of ON position or OFF position. The engine oil solenoid 107 may generate a controlled magnetic field when activated by the activation switch 105.

In an embodiment, when the hydraulic oil flows from the tank 101 through the valve 103, then the valve 103 is in first position. When the valve 103 is in first position, the activation switch 105 is activated. When the activation switch 105 is in ON position, the engine oil solenoid 107 interfaced with the activation switch 105 is activated. When the engine oil solenoid 107 is activated, the engine oil solenoid 107 allow the flow of fuel from a fuel source [not shown] into the engine so that the engine 109 continue to be in ON state and the engine 109 drives the hydraulic pump 111 for performing one or more functions of the heavy machineries.

In an embodiment, when the hydraulic oil does not flow from the tank 101 through the valve 103, then the valve 103 is in second position. When the valve 103 is in second position, the activation switch 105 is deactivated. Therefore, the activation switch 105 is in OFF position, when the activation switch 105 is in OFF position, the engine oil solenoid 107 is deactivated. Therefore, the engine oil solenoid 107 would not allow the flow of fuel from a fuel source [not shown] into the engine 109 thereby terminating operation of the hydraulic pump 111. In this manner, the present disclosure prevents dry run of the hydraulic pump 111 and avoids damage to the hydraulic pump 111.

In an embodiment, the engine oil solenoid 107 is a solenoid valve which may disposed in a fuel line between a fuel source and the engine 109. The engine oil solenoid 107 may allow or cut-off the flow of fuel into the engine 109 based on the signal from the activation switch 105. In an embodiment, the activation switch 105 is a limit switch, which in closed condition allow the circuit of the engine oil solenoid 107 to be closed, and thereby allow the flow of fuel through the engine oil solenoid 107. When the limit switch is in open condition, the circuit of the engine oil solenoid 107 is also open, and thereby flow of fuel through the engine oil solenoid 107 is cut-off, which halts the engine 109 operation.

Fig.2 shows a flowchart illustrating a method for preventing dry run of a hydraulic pump 111 in a heavy machinery in accordance with some embodiments of the present disclosure
As illustrated in Fig.2, the method 200 includes one or more blocks illustrating a method for preventing dry run of a hydraulic pump 111 in a heavy machinery in accordance with some embodiments of the present disclosure. The method 200 may be described in the general context of computer executable instructions. Generally, computer executable instructions can include routines, programs, objects, components, data structures, procedures, modules, and functions, which perform specific functions or implement specific abstract data types.

The order in which the method 200 is described is not intended to be construed as a limitation, and any number of the described method blocks can be combined in any order to implement the method. Additionally, individual blocks may be deleted from the methods without departing from the spirit and scope of the subject matter described herein. Furthermore, the method can be implemented in any suitable hardware, software, firmware, or combination thereof.

At block 201, the method may include coupling a valve 103 to an outlet of a tank 101. The tank 101 comprises hydraulic oil. The valve 103 operates in a first position when hydraulic oil flows from the tank 101 through the valve 103. The valve 103 operates in a second position when hydraulic oil does not flow from the tank 101 through the valve 103.
At block 203, the method may include connecting an activation switch 105 with the valve 103. In an embodiment, the activation switch 105 may be driven into one of ON position or OFF position. The activation switch 105 may be driven into ON position when the valve 103 is in first position and the activation switch 105 may be driven into OFF position when the valve 103 is in second position.
At block 205, the method may include activating an engine oil solenoid 107 interfaced with the activation switch 105. The engine oil solenoid 107 may be activated when the activation switch 105 is in ON position. In this scenario, the hydraulic oil flows through the engine 109 and drives the hydraulic pump 111 for performing one or more actions.

At block 207, the method may include deactivating the engine oil solenoid 107. The engine oil solenoid 107 may be deactivated when the activation switch 105 is in OFF position to cut off fuel supply to the engine 109 to terminate operation of the engine 109 for preventing dry run of the hydraulic pump 111.
In an embodiment, the present disclosure provides a method and system for preventing dry run of hydraulic pump in a heavy machinery.

In an embodiment, the present disclosure avoids dry run of the hydraulic pump and thereby prevents damage to the hydraulic pump.

The terms "an embodiment", "embodiment", "embodiments", "the embodiment", "the embodiments", "one or more embodiments", "some embodiments", and "one embodiment" mean "one or more (but not all) embodiments of the invention(s)" unless expressly specified otherwise.

The terms "including", "comprising", “having” and variations thereof mean "including but not limited to", unless expressly specified otherwise. The enumerated listing of items does not imply that any or all the items are mutually exclusive, unless expressly specified otherwise. The terms "a", "an" and "the" mean "one or more", unless expressly specified otherwise.

A description of an embodiment with several components in communication with each other does not imply that all such components are required. On the contrary, a variety of optional components are described to illustrate the wide variety of possible embodiments of the invention.

When a single device or article is described herein, it will be clear that more than one device/article (whether they cooperate) may be used in place of a single device/article. Similarly, where more than one device or article is described herein (whether they cooperate), it will be clear that a single device/article may be used in place of the more than one device or article or a different number of devices/articles may be used instead of the shown number of devices or programs. The functionality and/or the features of a device may be alternatively embodied by one or more other devices which are not explicitly described as having such functionality/features. Thus, other embodiments of the invention need not include the device itself.

Finally, the language used in the specification has been principally selected for readability and instructional purposes, and it may not have been selected to delineate or circumscribe the inventive subject matter. It is therefore intended that the scope of the invention be limited not by this detailed description, but rather by any claims that issue on an application based here on. Accordingly, the embodiments of the present invention are intended to be illustrative, but not limiting, of the scope of the invention, which is set forth in the following claims.

While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.

Referral Numerals:
Reference Number Description
100 System
101 Tank
103 Valve
105 Activation switch
107 Engine oil solenoid
109 Engine
111 Hydraulic pump