A power unit for an oil supply system and a work device

Abstract

The utility model discloses a kind of oil supply systems, including oil tank, oil pump and oil-gas mixing device, the oil pump is used to pump fuel in oil tank into oil-gas mixing device;Two oil outlets are provided on the oil tank, fuel from two The oil outlet enters oil pump;Two The oil outlet is set in the bottom of oil tank. On the other hand, the utility model also provides a kind of power unit of operating device, including engine, and the oil supply system provided above. Advantageous effect is that in complex working condition, the layout design of the utility model can ensure that at least one oil outlet contacts fuel, and fuel is ensured stable supply by oil pump;Double oil outlet can meet the fuel consumption and stability demand of different displacement engine under different working conditions;In addition, the design of oil outlet and oil pump can also disperse oil supply pressure, reduce single pipeline wear, assist fuel heat dissipation;To comprehensively improve oil supply stability, adapt complex working condition and effectively improve fuel utilization.

Description

Technical Field

[0001] This utility model relates to the field of engine combustion technology, specifically to a power unit for a fuel supply system and operating device. Background Technology

[0002] The fuel supply system is the core device responsible for providing fuel to power units such as engines. Its function is to ensure that the fuel is clean, the pressure is stable, and it is supplied on demand to ensure the smooth operation of power units such as engines.

[0003] For example, CN201810433U discloses a general-purpose gasoline engine fuel tank, including a tank body, a fuel outlet, and a fuel nozzle. The fuel nozzle is installed at the fuel outlet, which communicates with the inner cavity of the tank body. The key feature is that a downward-protruding portion is provided at one corner of the bottom of the tank body, and the bottom surface of the tank body transitions to the protruding portion with a slope. The fuel outlet is located inside the protruding portion. Fuel flow between the fuel nozzle and the carburetor is unobstructed. However, when the agricultural machinery tilts, the fuel in the tank will accumulate on one side, and a single fuel nozzle cannot continuously supply fuel to the machinery's power system, leading to fuel shortage and engine shutdown.

[0004] To address this issue, CN212003395U discloses an agricultural machinery fuel tank with dual fuel nozzles, comprising a housing formed by an upper shell and a lower shell, and fuel nozzles mounted on the housing. The lower shell has two symmetrical recesses formed inwards at its bottom; these recesses are strip-shaped angle steel; each recess has an inclined surface for fixing the fuel nozzle. Preferably, the strip-shaped recesses are arranged longitudinally, and the fuel nozzle is fixed to the inclined surface of the recess near the side wall of the lower shell. Preferably, the recesses are formed at the rear of the housing. Preferably, the outer wall of the lower shell is covered by a bottom shell, which has mounting holes for fixing. Preferably, the bottom shell also has clearance protrusions for accommodating the fuel nozzle and fuel pipe, as well as clearance holes for the fuel supply pipe to extend out. This design avoids interference between the bottom shell and the fuel nozzle and fuel pipe, facilitates installation, and has a compact structure.

[0005] The symmetrical design of the above scheme ensures that the fuel tank can output fuel whether the agricultural machinery is tilted to the left or right, preventing the machinery from stalling. However, when the fuel tank is tilted upwards or downwards or in other complex operating conditions, the fuel supply may be unstable or unable to output fuel, requiring the fuel tank to be replaced or refueling to be done, resulting in low fuel efficiency. Utility Model Content

[0006] The purpose of this invention is to provide a fuel supply system and power unit for a working device that provides reliable fuel supply and high fuel utilization under complex working conditions.

[0007] To achieve the above objectives, the basic solution of this utility model provides a fuel supply system, including a fuel tank, a fuel pump, and a fuel-air mixing device. The fuel pump is used to pump fuel from the fuel tank into the fuel-air mixing device. The fuel tank is provided with two fuel outlets, and the fuel coming out of the two fuel outlets enters the fuel pump.

[0008] The beneficial effects of this basic solution are as follows: the layout design of this utility model can ensure that at least one fuel outlet is in contact with fuel, and the fuel pump ensures a stable fuel supply; the dual fuel outlets can meet the fuel consumption and stability requirements of different displacement power units under different operating conditions; in addition, the design of the fuel outlets and fuel pump can also distribute the fuel supply pressure, reduce wear on a single pipeline, and assist in fuel cooling; thereby comprehensively improving fuel supply stability, adapting to complex operating conditions, and effectively improving fuel utilization.

[0009] Preferably, both fuel outlets are located at the bottom of the fuel tank. This ensures more efficient fuel utilization, as the bottom of the tank is where fuel naturally collects, maximizing the extraction of remaining fuel, reducing waste, and effectively improving fuel efficiency.

[0010] Preferably, the two fuel outlets are arranged diagonally on the bottom of the fuel tank. This further reduces the dead zone, allowing for more complete extraction of fuel from the tank and improving fuel efficiency.

[0011] Preferably, the two oil outlets are connected to the oil pump via an oil pipe connection device.

[0012] Preferably, the oil pipe connection device is arranged directly below the center of the oil tank.

[0013] Preferably, the oil pipe connection device is equipped with three connectors, two of which are each connected to an oil outlet, and the third is connected to the oil pump. This ensures continuous fuel supply: if a single oil outlet fails or has insufficient flow, the other can fill the gap, preventing oil pump interruption. It also increases the total fuel supply: the parallel output of two oil outlets can meet the oil pump's greater suction flow requirements, adapting to complex operating conditions such as high loads. Furthermore, it balances fuel supply pressure: the convergence of multiple sources buffers pressure fluctuations at a single oil outlet, resulting in more stable fuel pressure entering the oil pump and effectively improving fuel utilization.

[0014] Preferably, the oil pump is also equipped with a negative pressure port for obtaining negative pressure. This negative pressure generates a stable suction pressure, drawing fuel from the fuel tank into the pump chamber and ensuring a continuous supply of fuel to the system.

[0015] Preferably, the oil pump and oil-air mixing device are located below the fuel tank. Utilizing gravity-assisted fuel supply reduces the oil pump's suction resistance, preventing idling or insufficient fuel supply, making it particularly suitable for complex operating conditions such as tilting or bumping. Secondly, it shortens the fuel delivery path, simplifies pipeline layout, and improves fuel utilization.

[0016] Preferably, the oil-gas mixing device is equipped with an overflow port, which allows excess fuel to flow back to the fuel tank when there is an excess of fuel in the mixing device. This effectively avoids unstable fuel supply caused by component failure due to excess fuel.

[0017] Secondly, this utility model provides a power unit for an operating device, including an engine and the aforementioned oil supply system.

[0018] Preferably, the engine includes a crankcase and an intake system, and the negative pressure interface is connected to the crankcase and / or the intake system to collect negative pressure.

[0019] This utility model has the following beneficial effects: 1. In complex operating conditions such as climbing, tilting, or severe bumps, a single fuel nozzle may detach from the fuel surface, causing a fuel supply interruption. Two fuel nozzles are distributed in different positions, ensuring that one of them is always in contact with fuel and guaranteeing a stable fuel supply.

[0020] 2. Dual fuel nozzles can supply fuel simultaneously, increasing fuel output flow and meeting the high fuel consumption and stable fuel delivery requirements of large-displacement engines under complex operating conditions.

[0021] 3. Reasonable structural design and spatial layout; ensuring stable fuel supply under complex working conditions, while further reducing dead zones, generating stable suction pressure through negative pressure, shortening fuel delivery paths, etc., thereby further improving fuel utilization. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0023] Figure 2 This is a schematic diagram of the bottom structure of the fuel tank in Embodiment 1 of this utility model. Detailed Implementation

[0024] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings are as follows: 1-oil pump, 11-oil inlet, 12-oil outlet, 13-negative pressure interface, 2-carburetor, 3-first fuel outlet, 4-second fuel outlet, 5-oil pipe connection device, 6-bracket, 7-engine.

[0025] The fuel supply system provided in this embodiment includes a fuel tank, a fuel pump 1, and a fuel-air mixing device. The fuel pump 1 is used to pump fuel from the fuel tank into the fuel-air mixing device. The fuel tank is provided with two fuel outlets, and the fuel coming out of the two fuel outlets enters the fuel pump 1. The fuel-air mixing device provided in this embodiment can be a carburetor 2.

[0026] Even better, both fuel outlets are located at the bottom of the fuel tank.

[0027] Even better, the two fuel outlets are arranged diagonally on the bottom of the fuel tank.

[0028] Even better, the two oil outlets are connected to the oil pump 1 via the oil pipe connection device 5.

[0029] Even better, the oil pipe connection device 5 is located directly below the center of the oil tank.

[0030] Even better, the oil pipe connection device 5 is equipped with three connectors, two of which are each connected to an oil outlet, and the third is connected to the oil pump 1.

[0031] Even better, the oil pump 1 is also equipped with a negative pressure port 13 for obtaining negative pressure.

[0032] Even better, the oil pump 1 and the oil-gas mixing device are located below the oil tank.

[0033] Even better, the fuel-air mixing device is equipped with an overflow port, so that when there is excess fuel in the fuel-air mixing device, the excess fuel can flow back to the fuel tank through the overflow port.

[0034] In addition, this embodiment also provides a power unit for the working device, including an engine 4, and a fuel supply system provided in the above embodiment.

[0035] Even better, engine 7 includes a crankcase and an intake system, with negative pressure interface 13 connected to the crankcase and / or the intake system to collect negative pressure. Even better, the power unit of the working device in this embodiment also includes a bracket 6, an engine 7 is installed inside the bracket 6, and an oil pump 1 is installed on the bracket 6.

[0036] Even better, the oil pump 1 is installed at a horizontal height higher than the engine 7 but lower than the fuel tank.

[0037] The basic implementation examples are as follows: Figure 1-2 As shown: The fuel supply system provided in this embodiment consists of a fuel tank, a fuel pump 1, and a carburetor 2. The fuel pump 1 is used to pump fuel from the fuel tank into the carburetor 2 to mix with air.

[0038] The fuel pump 1 is equipped with an inlet 11, an outlet 12, and a negative pressure port 13. The inlet 11 is connected to the fuel tank to obtain fuel, the outlet 12 is connected to the carburetor and delivers fuel to the carburetor 2, and the negative pressure port 13 is used to obtain negative pressure. The negative pressure generates suction to draw fuel from the fuel tank 1 into the fuel pump 1, ensuring that the fuel pump 1 continuously outputs fuel to the system.

[0039] Two fuel outlets are provided on the fuel tank, namely the first fuel outlet 3 and the second fuel outlet 4. The first fuel outlet 3 and the second fuel outlet 4 are used to connect to the fuel pump 1 and deliver fuel to the fuel pump 1.

[0040] Preferably, the first fuel outlet 3 and the second fuel outlet 4 are located at the bottom of the fuel tank and are arranged diagonally at the bottom of the fuel tank. This reduces the dead zone of fuel and allows the fuel in the fuel tank to be extracted more fully, thereby improving fuel utilization.

[0041] Below the center of the fuel tank, there is a fuel line connection device 5 with three connectors. The first connector connects to the first fuel outlet 3 via a pipe, the second connector connects to the second fuel outlet 4 via a pipe, and the third connector connects to the fuel inlet 11 of the fuel pump 1. Fuel from the first and second fuel outlets 3 and 4 flows into the fuel line connection device 5 and then enters the fuel pump 1 through the third connector, pipe, and fuel inlet 11. This improves fuel supply stability and adapts to multi-source fuel supply needs.

[0042] Furthermore, preferably, the oil pump 1 and the carburetor 2 are arranged below the fuel tank.

[0043] The carburetor 2 is also equipped with an overflow port, which allows excess fuel to flow back to the fuel tank when there is an excess amount of fuel in the carburetor 2. Specifically, a return line can be provided between the overflow port and the fuel tank to allow fuel to flow back to the fuel tank. Alternatively, a return line can be directly provided between the overflow port and the fuel line connection device 5, so that the fuel enters the fuel line connection device 5 and then re-enters the fuel pump 1.

[0044] In addition, a return line can be installed between the oil pipe connection device 5 and the oil tank. When there is excess fuel in the oil pipe connection device 5, the excess fuel will return to the oil tank through the return line.

[0045] Example 2 is basically as shown in the appendix. Figure 1-2 As shown: The power unit of the working device provided in this embodiment includes an engine 7 and the oil supply system provided in Embodiment 1 above. Preferably, the engine 7 includes a crankcase and an intake system, and the negative pressure port 13 is connected to the crankcase and / or the intake system to collect negative pressure.

[0046] Preferably, the power unit of the working device in this embodiment also includes a bracket 6, an engine 7 is installed inside the bracket 6, and an oil pump 1 is installed on the bracket 6.

[0047] Even better, the oil pump 1 is installed at a horizontal height higher than the engine 7 but lower than the fuel tank.

[0048] The specific implementation process is as follows: When the power unit of the working device is running, the negative pressure interface 13 of the oil pump 1 is connected to the crankcase and / or the intake system to collect negative pressure, and the fuel in the fuel tank is sucked into the oil pump 1 through the first fuel outlet 3, the second fuel outlet 4, and the fuel inlet 11, and then sent from the oil pump 1 through the fuel outlet 12 into the carburetor 2.

[0049] The above description is merely an embodiment of this utility model, and common knowledge such as specific structures and characteristics of the solution is not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these should also be considered within the protection scope of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. An oil supply system, characterized in that: It includes a fuel tank, a fuel pump, and a fuel-air mixing device. The fuel pump is used to pump fuel from the fuel tank into the fuel-air mixing device. The fuel tank is provided with two fuel outlets, and the fuel coming out of the two fuel outlets enters the fuel pump.

2. The oil supply system according to claim 1, characterized in that: Both of the oil outlets are located at the bottom of the oil tank.

3. The oil supply system according to claim 2, characterized in that: The two oil outlets are arranged diagonally on the bottom of the oil tank.

4. The oil supply system according to any one of claims 1-3, characterized in that: The two oil outlets are connected to the oil pump via an oil pipe connection device.

5. The oil supply system according to claim 4, characterized in that: The oil pipe connection device is located directly below the center of the oil tank.

6. The oil supply system according to claim 5, characterized in that: The oil pipe connection device is equipped with three connectors, two of which are each connected to an oil outlet, and the third is connected to the oil pump.

7. The oil supply system according to any one of claims 1-3 and 4-5, characterized in that: The oil pump is also equipped with a negative pressure port for obtaining negative pressure.

8. The oil supply system according to claim 7, characterized in that: The oil-gas mixing device is equipped with an overflow port, which allows excess fuel to flow back to the fuel tank when there is an excess amount of fuel in the oil-gas mixing device.

9. A power unit for an operating device, comprising an engine and a fuel supply system as described in any one of claims 1-8.

10. The power unit of the working device according to claim 9, characterized in that: The engine includes a crankcase and an intake system, and the negative pressure interface is connected to the crankcase and / or the intake system to collect negative pressure.

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