Fuel oil supply system of diesel engine

Abstract

The utility model discloses a diesel engine fuel oil supply system which comprises a diesel engine, an electric oil delivery pump, a fuel oil high-pressure oil pump, a fuel oil stop valve and a diesel oil tank are arranged on the diesel engine, the diesel oil tank is communicated with the electric oil delivery pump through a first oil inlet pipe, and the electric oil delivery pump is communicated with the fuel oil stop valve through a second oil inlet pipe. The fuel stop valve is communicated with the fuel high-pressure oil pump through a third oil inlet pipe, the fuel high-pressure oil pump is communicated with the stop valve through a first oil return pipe, the stop valve is communicated with the diesel tank through a second oil return pipe, and an oil supply mechanism is arranged between the diesel tank and the electric oil delivery pump and comprises a fuel hand oil pump and a fuel oil delivery pump. Fuel oil is provided for the diesel engine through the fuel oil delivery pump; the oil supply device is simple in structure and convenient to operate, oil is continuously supplied to the diesel engine through the fuel oil delivery pump, the maintenance cost of the mining dump truck is greatly reduced, the fault occurrence rate of a fuel oil system of the large mining dump truck is effectively reduced, and the operation time of the mining dump truck is remarkably prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel supply for diesel engines, in particular to a fuel supply system for diesel engines. Background Art

[0002] A large-scale mining dump truck uses a QST30-C engine produced by Cummins of the United States. The QST30-C engine often suffers from insufficient power during operation. After inspection, it was found that the engine's electric oil pump had a fault, resulting in insufficient pressure in the fuel system, poor oil supply, and reduced engine output power. The failure of the electric oil pump caused the mining dump truck to shut down, reducing the effective operating time of the mining dump truck. In addition, the electric oil pump is not repairable, and the cost of replacing a new electric oil pump is high, which increases the maintenance cost of the mining dump truck. In order to solve the above problems, a diesel engine fuel supply system is proposed. Summary of the invention

[0003] The purpose of the utility model is to solve the above problems and provide a fuel supply system for a diesel engine.

[0004] The specific scheme of the utility model is: a diesel engine fuel supply system, comprising: a diesel engine, the diesel engine is provided with an electric fuel pump, a fuel high-pressure fuel pump, a fuel shut-off valve, and a diesel tank, the diesel tank is connected with the electric fuel pump through a fuel inlet pipe 1, the electric fuel pump is connected with the fuel shut-off valve through a fuel inlet pipe 2, the fuel shut-off valve is connected with the fuel high-pressure fuel pump through a fuel inlet pipe 3, the fuel high-pressure fuel pump is connected with the shut-off valve through a return pipe 1, the shut-off valve is connected with the diesel tank through a return pipe 2, a fuel supply mechanism is provided between the diesel tank and the electric fuel pump, and the fuel supply mechanism comprises:

[0005] A fuel hand pump, the fuel hand pump is connected to the diesel engine through a mounting frame 1; a reducer A and a reducer B are connected to the fuel hand pump, and the reducer A is connected to the diesel tank through an oil inlet pipe 1;

[0006] A fuel transfer pump, which is connected to the diesel engine through a mounting frame 2, and is connected with a reducer C and a reducer D, wherein the reducer C is connected to a reducer B of a fuel hand pump through an inlet pipe 4, and the reducer D is connected to an electric fuel pump through an inlet pipe 5; the power of the fuel transfer pump comes from an idler wheel of the diesel engine, and a transmission belt is provided between the idler wheel and the fuel transfer pump.

[0007] Furthermore, a fuel pre-filter is provided on the oil inlet pipe.

[0008] Furthermore, the model of the fuel hand pump is a W pump.

[0009] Furthermore, the model of the transmission belt is a V-belt model a850mm.

[0010] Furthermore, the model of the fuel delivery pump is SP3 3009 1013.

[0011] The utility model has the following beneficial effects:

[0012] The design is simple and the manufacturing cost is low. When the electric fuel pump of the diesel engine of a large mining dump truck fails, there is no need to replace the expensive electric fuel pump. The diesel engine is continuously supplied with fuel through the fuel pump, which greatly reduces the maintenance cost of mining dump trucks, effectively reduces the failure rate of the fuel system of large mining dump trucks, and significantly improves the operation time of mining dump trucks. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structural principle of the utility model;

[0014] In the figure: 1. diesel engine; 2. electric fuel pump; 3. fuel high-pressure fuel pump; 4. fuel shut-off valve; 5. diesel tank; 6. fuel inlet pipe 1; 7. fuel inlet pipe 2; 8. fuel inlet pipe 3; 9. return pipe 1; 10. return pipe 2; 11. fuel hand pump; 12. mounting bracket 1; 13. reducer A; 14. reducer B; 15. mounting bracket 2; 16. fuel pump; 17. fuel inlet pipe 4; 18. reducer C; 19. reducer D; 20. fuel inlet pipe 5; 21. idler; 22. transmission belt; 23. fuel pre-filter. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0017] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0018] Please refer to Figure 1 A fuel supply system for a diesel engine 1, comprising: a diesel engine 1, wherein the diesel engine 1 is provided with an electric fuel pump 2, a high-pressure fuel pump 3, a fuel shut-off valve 4, and a diesel tank 5, wherein the diesel tank 5 is connected to the electric fuel pump 2 through an oil inlet pipe 1 6, wherein the electric fuel pump 2 is connected to the fuel shut-off valve 4 through an oil inlet pipe 2 7, wherein the fuel shut-off valve 4 is connected to the high-pressure fuel pump 3 through an oil inlet pipe 3 8, wherein the high-pressure fuel pump 3 is connected to the shut-off valve through an oil return pipe 1 9, wherein the shut-off valve is connected to the diesel tank 5 through an oil return pipe 2 10, wherein a fuel supply mechanism is provided between the diesel tank 5 and the electric fuel pump 2, wherein the fuel supply mechanism comprises:

[0019] A fuel hand pump 11, the fuel hand pump 11 is connected to the diesel engine 1 through a mounting frame 12; a reducer A13 and a reducer B14 are connected to the fuel hand pump 11, and the reducer A13 is connected to the diesel tank 5 through an oil inlet pipe 6;

[0020] A fuel delivery pump 16, wherein the fuel delivery pump 16 is connected to the diesel engine 1 via a mounting frame 15, and is connected to a reducer C18 and a reducer D19, wherein the reducer C18 is connected to the reducer B14 of the fuel manual pump 11 via an inlet pipe 17, and the reducer D19 is connected to the electric fuel delivery pump 2 via an inlet pipe 20; the power of the fuel delivery pump 16 comes from an idler wheel 21 of the diesel engine 1, and a transmission belt 22 is provided between the idler wheel 21 and the fuel delivery pump 16.

[0021] Specifically, the idler wheel 21 mentioned here is the idler wheel 21 that comes with the diesel engine 1, and it can have two pulley grooves, one of which is used for transmitting existing power, and the other idler wheel 21 groove is used for the driving force of the fuel pump 16 of this system, which is transmitted to the fuel pump 16 through the transmission belt 22.

[0022] In this embodiment, a fuel pre-filter is provided on the fuel inlet pipe 16.

[0023] In this embodiment, the model of the fuel hand pump 11 is a W pump.

[0024] In this embodiment, the transmission belt 22 is a V-belt of model a850mm.

[0025] In this embodiment, the model of the fuel delivery pump 16 is SP3 3009 1013.

[0026] The utility model has the following beneficial effects:

[0027] The design is simple and the manufacturing cost is low. When the electric oil pump 2 of the diesel engine 1 of a large-scale mining dump truck fails, there is no need to replace the expensive electric oil pump 2. The diesel engine 1 is continuously supplied with oil through the fuel pump 16, which greatly reduces the maintenance cost of the mining dump truck, effectively reduces the failure rate of the fuel system of large-scale mining dump trucks, and significantly improves the operation time of the mining dump truck.

Claims

1. A diesel engine fuel supply system, comprising: A diesel engine, wherein the diesel engine is provided with an electric fuel pump, a high-pressure fuel pump, a fuel shut-off valve, and a diesel tank, wherein the diesel tank is connected to the electric fuel pump through a fuel inlet pipe 1, the electric fuel pump is connected to the fuel shut-off valve through a fuel inlet pipe 2, the fuel shut-off valve is connected to the high-pressure fuel pump through a fuel inlet pipe 3, the high-pressure fuel pump is connected to the shut-off valve through a return fuel pipe 1, and the shut-off valve is connected to the diesel tank through a return fuel pipe 2, and the diesel engine is characterized in that a fuel supply mechanism is provided between the diesel tank and the electric fuel pump, and the fuel supply mechanism comprises: A fuel hand pump, the fuel hand pump is connected to the diesel engine through a mounting frame 1; a reducer A and a reducer B are connected to the fuel hand pump, and the reducer A is connected to the diesel tank through an oil inlet pipe 1; A fuel transfer pump, which is connected to the diesel engine through a mounting frame 2, and is connected with a reducer C and a reducer D, wherein the reducer C is connected to a reducer B of a fuel hand pump through an inlet pipe 4, and the reducer D is connected to an electric fuel pump through an inlet pipe 5; the power of the fuel transfer pump comes from an idler wheel of the diesel engine, and a transmission belt is provided between the idler wheel and the fuel transfer pump.

2. A diesel engine fuel supply system according to claim 1, characterized in that: The first oil inlet pipe is provided with a fuel pre-filter.

3. A diesel engine fuel supply system according to claim 1, characterized in that: The model of the fuel hand pump is W pump.

4. A diesel engine fuel supply system according to claim 3, characterized in that: The model of the transmission belt is a V-belt model a850mm.

5. A diesel engine fuel supply system according to claim 1, characterized in that: The model of the fuel transfer pump is SP3 3009 1013.

Images