Automatic fuel oil distribution device for internal combustion engine of train

Abstract

The invention relates to the technical field of fuel pumps, and discloses a train internal combustion engine fuel automatic distribution device which comprises a shell and a fuel pump, the fuel pump comprises a pump shell, a pump liquid cavity is formed in the lower end of the pump shell, a pump liquid paddle rotating continuously is arranged in the pump liquid cavity, and a fuel outlet end is fixedly arranged at the top of the shell. A cavity is formed in the position, close to the liquid pumping cavity, in the pump shell, a circulation hole is formed in the inner side wall of the cavity and used for communicating with the liquid pumping cavity, the bottom end of the pump shell is fixedly connected with the outer shell, an inner shell is arranged in the outer shell in a sliding mode, a hollow conveying cavity is formed in the inner shell, and a conveying chamber is formed by the inner shell and the pump shell; and the chamber is connected with the conveying cavity through a plurality of conveying pipes. When the fuel quantity in the fuel tank is insufficient and the fuel pump runs, oil is conveyed into the conveying chamber, so that the oil can flow upwards from the outer side of the pump shell to cool the fuel pump, and the fuel pump is not influenced by the fuel quantity of the fuel tank.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel pumps, in particular to an automatic fuel distribution device for an internal combustion engine of a train. BACKGROUND

[0002] Trains are important means of transportation, and the performance of their power systems directly affects the efficiency, safety and economy of the trains. Internal combustion engines are one of the commonly used power devices for trains, and their operation relies on the stable supply and reasonable distribution of fuel. In the fuel delivery link, the performance of the fuel pump, as the core component, directly determines the effect of fuel distribution.

[0003] However, when the fuel tank is low in fuel, the fuel pump cannot be immersed, so the heat generated by the operation of the fuel pump cannot be removed, and the fuel pump does not have the function of self-cooling.

[0004] According to the search, a combined fuel pump is disclosed in the publication number CN115342015B, which includes a pump body, the pump body includes a pump shell, the lower end of the pump shell is provided with a pump liquid cavity, and a continuously rotating pump liquid paddle is arranged in the pump liquid cavity. The outer side of the pump shell is provided with a plurality of evenly arranged fins, and a sleeve is arranged outside the fins. A plurality of evenly arranged liquid outlets are arranged on the outer side of the pump shell close to the pump liquid cavity, and the liquid outlets are in communication with the inner side of the sleeve. The oil liquid is pumped into the pump liquid cavity by the continuously rotating pump liquid paddle, and the oil liquid in the pump liquid cavity is uniformly discharged to the outside through the liquid outlets. At this time, the combination of the sleeve and the pump shell forms a channel for the oil liquid to flow through on the outer side of the pump shell, so that the oil liquid uniformly flows over the outer surface of the pump shell to cool it. It has good cooling effect and is not affected by the amount of oil in the oil tank.

[0005] In the above-mentioned application, when the internal fuel is sufficient, the sleeve will isolate the fuel in the oil tank from contacting the fuel pump, thereby affecting the heat dissipation effect of the fuel pump. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application provides an automatic fuel distribution device for an internal combustion engine of a train, which solves the problem that the fuel pump cannot be immersed when the oil tank is low in fuel, thereby the heat generated by the operation of the fuel pump cannot be removed.

[0007] In order to achieve the above object, the present application is realized by the following technical scheme: a train internal combustion engine fuel automatic distribution device, comprising a shell and a fuel pump, the fuel pump comprises a pump shell, the lower end of the pump shell is provided with a pump liquid cavity, and a pump liquid paddle that rotates continuously is arranged in the pump liquid cavity, the top of the shell is fixedly provided with an oil outlet, a cavity is formed in the inside of the pump shell close to the pump liquid cavity, a flow hole is formed in the inner side wall of the cavity for communicating the pump liquid cavity, the bottom end of the pump shell is fixedly connected with the shell, an inner shell is slidably arranged in the inside of the shell, a hollow conveying cavity is arranged in the inside of the inner shell, the inner shell and the pump shell form a conveying chamber, the cavity and the conveying cavity are connected through a plurality of conveying pipes, a liquid outlet is fixedly arranged on the lower inner wall of the conveying cavity, a plurality of outflow ports are fixedly arranged on the top of the inner shell, and a one-way valve is fixedly arranged on the outflow port, a flow path adjusting assembly is installed in the inside of the conveying cavity.

[0008] The flow path adjusting assembly comprises a one-way outflow valve and an electric push cylinder arranged in a ring shape, the one-way outflow valve is fixedly arranged on the top of the inner shell and communicates with the conveying cavity, and the electric push cylinder is fixedly installed on the top of the shell, and the driving end of the electric push cylinder is fixedly connected with the inner shell.

[0009] The flow path adjusting assembly further comprises a T-shaped sealing element and an annular slot, the slot is formed in the lower outer wall of the pump shell, the cross section of the slot is trapezoidal, the sealing element is coaxially arranged in the inside of the liquid outlet, a support ring is arranged on the outer wall of the sealing element, and the support ring is fixedly installed on the inner wall of the liquid outlet.

[0010] A pull spring is arranged on the surface of the sealing element, the two ends of the pull spring are fixedly connected with the sealing element and the support ring respectively, one end of the sealing element penetrates through the inner shell and extends into the slot, an annular protrusion is fixedly arranged on the surface of the sealing element, and a sealing pad is fixedly arranged on the side of the protrusion facing the inner shell.

[0011] The flow path adjusting assembly further comprises an annular partition plate, the partition plate is fixedly installed on the lower inner wall of the inner shell, a plurality of oil outlets are formed in the upper surface of the partition plate, a sealing plate is arranged below the oil outlet, and the sealing plate is rotatably connected with the partition plate through a shaft.

[0012] The flow path adjusting assembly further comprises a plurality of one-way inflow valves and flow holes arranged from top to bottom, the one-way inflow valves are fixedly arranged on the surface of the inner shell and communicate with the conveying chamber, the flow holes are formed in the lower surface of the inner shell and communicate with the conveying chamber, a sealing head is arranged directly below the flow hole, and the sealing head is fixedly installed on the bottom end of the pump shell.

[0013] The outer side wall of the pump shell is fixedly provided with a plurality of heat dissipation fins in annular distribution, and the upper side wall of the pump shell is fixedly provided with an annular support frame, which is slidingly connected with the inner shell in the vertical direction.

[0014] A filter assembly is mounted below the pump shell, which comprises an outer ring fixedly mounted at the bottom end of the pump shell, the inner side wall of the outer ring is rotatably connected with a filter screen, a plurality of piston cylinders are arranged above the filter screen, the conveying pipe is a three-way pipe, and one end of the conveying pipe is connected with the piston cylinder.

[0015] The inside of the piston cylinder is provided with a switching channel connected with the conveying pipe, the inside of the switching channel is slidingly provided with a sealing block, the side wall of the sealing block is fixedly connected with an elastic member, the end of the elastic member away from the sealing block is fixedly connected with the switching channel, the upper surface of the switching channel is provided with a liquid inlet hole and a liquid outlet hole, respectively, and the inside of the piston cylinder is slidingly provided with a counterweight piston block, the bottom end of the piston cylinder is fixedly provided with a spray head, and the upper surface of the filter screen is fixedly provided with annularly distributed blades.

[0016] A train internal combustion engine fuel automatic distribution method, the method comprises the following steps:

[0017] S1, real-time acquisition of the running parameters of each internal combustion engine of the train, the running parameters include speed, power, temperature and current fuel remaining, through the installation of professional sensors at the corresponding positions of each internal combustion engine: the speed is collected by a speed sensor, which can be installed at the crankshaft or flywheel of the engine, and the number of revolutions of the crankshaft or flywheel is inducted to obtain the speed information in real time; the power is collected by a power sensor, which can be connected with the power output end of the internal combustion engine to monitor the output power; the temperature is collected by a temperature sensor, which is usually installed at the cylinder body, cooling liquid circuit and other key parts of the engine to accurately monitor the working temperature of the internal combustion engine; the current fuel remaining is collected by an oil level sensor, which is installed in the fuel tank to detect the fuel level in the fuel tank in real time, and then the fuel remaining is calculated, and the parameters collected by the sensor are transmitted to the data acquisition module;

[0018] S2, fuel is delivered to each internal combustion engine by a fuel pump group, and the output flow and output pressure of each fuel pump are collected by a flow sensor and a pressure sensor respectively, the fuel pump group is composed of a plurality of fuel pumps, each fuel pump is connected with one internal combustion engine to ensure that each internal combustion engine is supplied with oil separately, the flow sensor is installed on the outlet pipe of the fuel pump to monitor the output flow of the fuel pump in real time; the pressure sensor is also installed on the outlet pipe of the fuel pump to monitor the output pressure of the fuel pump;

[0019] S3. The collected internal combustion engine operating parameters, fuel pump output flow and output pressure are transmitted to the control unit. The data acquisition module organizes and converts the collected parameters and then transmits them to the control unit through the communication line. The control unit can be a microprocessor or PLC or other device with data processing and control functions.

[0020] S4. The control unit calculates the amount of fuel required by each internal combustion engine based on a preset fuel distribution algorithm, combined with the operating parameters of each internal combustion engine, the output flow rate and output pressure of the fuel pump. The preset fuel distribution algorithm is mainly based on the power demand of each internal combustion engine, because the power demand directly reflects the load of the internal combustion engine. The greater the load, the more fuel is usually required. At the same time, the current fuel reserve of the internal combustion engine is considered. If the fuel reserve of a certain internal combustion engine is low, its fuel distribution is appropriately increased. Combined with the operating temperature, when the internal combustion engine temperature is too high, the fuel distribution is appropriately adjusted to avoid the temperature from rising further due to fuel supply problems. The output pressure of the fuel pump is referenced to ensure that the fuel pump operates within a reasonable pressure range to ensure the stability of fuel delivery.

[0021] S5. The control unit adjusts the speed of the corresponding fuel pump according to the calculated fuel quantity required by each internal combustion engine, so as to change the output flow of the fuel pump and realize automatic fuel distribution. Each fuel pump is equipped with a variable frequency drive for adjusting its speed. The control unit adjusts the speed of the fuel pump by sending a control signal to the variable frequency drive. There is a certain proportional relationship between the speed of the fuel pump and the output flow. By adjusting the speed, the output flow can be precisely controlled, thereby meeting the fuel demand of each internal combustion engine.

[0022] This invention provides an automatic fuel distribution device for a train's internal combustion engine. It has the following advantages:

[0023] 1. When the fuel level in the fuel tank is insufficient, the present invention delivers fuel into the delivery chamber by running the fuel pump, so that the fuel can flow upward from the outside of the pump casing to dissipate heat and cool the fuel pump, regardless of the amount of fuel in the fuel tank.

[0024] 2. When the fuel tank is full, the fuel in the tank can enter the delivery chamber through a one-way inflow valve and flow out through the flow hole, thereby cooling the fuel pump. Compared with the prior art, this invention allows the fuel pump to be immersed in the fuel for cooling when there is a lot of fuel in the tank.

[0025] 3. This invention allows for switching the fuel flow rate based on the amount of fuel in the fuel tank. When there is a lot of fuel in the tank, the fuel pump can be immersed in the fuel for heat dissipation. When there is not enough fuel in the tank to cover the fuel pump, the fuel flows over the outer surface of the fuel pump to dissipate heat and cool it down. This fully utilizes the fuel to cool the fuel pump and improves the heat dissipation effect of the fuel pump.

[0026] 4、The present application filters fuel through the filter screen, and after the fuel pump stops running, the fuel is sprayed through the spray head, achieving the effect of automatically back-flushing the filter screen, and when the fuel is sprayed, it acts on the vane, causing the vane to rotate the filter screen, thereby expanding the back-flushing range and improving the cleaning effect on the filter screen. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a perspective view of the present application;

[0028] Figure 2 It is a cross-sectional view of the shell of the present application;

[0029] Figure 3 It is a partial cross-sectional view of the pump shell of the present application;

[0030] Figure 4 It is a cross-sectional view of the inner shell of the present application;

[0031] Figure 5 It is a structure schematic view of the flow path adjusting assembly of the present application;

[0032] Figure 6 It is an enlarged view of A of the present application; Figure 5

[0033] Figure 7 It is a structure schematic view of the filter assembly of the present application;

[0034] Figure 8 It is an enlarged view of B of the present application. Figure 7

[0035] Wherein, 1, shell; 2, fuel pump; 21, pump shell; 22, pump liquid cavity; 23, pump liquid vane; 24, chamber; 25, heat dissipation fin; 26, support frame; 3, inner shell; 4, conveying cavity; 5, conveying pipe; 6, oil outlet end; 7, liquid outlet end; 8, flow path adjusting assembly; 801, one-way outflow valve; 802, electric push cylinder; 803, sealing piece; 804, support ring; 805, tension spring; 806, slot; 807, protrusion; 808, partition plate; 809, oil outlet; 810, sealing plate; 811, one-way inflow valve; 812, flow hole; 813, sealing head; 9, filter assembly; 901, outer ring; 902, filter screen; 903, piston cylinder; 904, switching channel; 905, sealing block; 906, elastic piece; 907, liquid inlet hole; 908, liquid outlet hole; 909, counterweight piston block; 910, spray head; 911, vane; 10, outflow end. DETAILED DESCRIPTION

[0036] ​​The technical solutions of the present application will be described clearly and completely below with reference to the drawings of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0037] Embodiment one: please refer to the attached Figure 1 -attached Figure 3 The embodiment provides a train internal combustion engine fuel automatic distribution device, which comprises a shell 1 and a fuel pump 2. The fuel pump 2 comprises a pump shell 21. A pump liquid cavity 22 is arranged at the lower end of the pump shell 21, and a pump liquid paddle 23 rotating continuously is arranged in the pump liquid cavity 22. A stator and a rotor are arranged in the pump shell 21, and the rotation work during oil pumping is realized through cooperation of the stator and the rotor. An oil outlet end 6 is fixedly arranged at the top of the shell 1. A cavity 24 is arranged at the position close to the pump liquid cavity 22 in the pump shell 21. A flow-through hole is arranged in the inner side wall of the cavity 24 and is used for connecting the pump liquid cavity 22. The bottom end of the pump shell 21 is fixedly connected with the shell 1. An inner shell 3 is slidably arranged in the shell 1. A hollow conveying cavity 4 is arranged in the inner shell 3. The inner shell 3 and the pump shell 21 form a conveying chamber. The cavity 24 and the conveying cavity 4 are connected through a plurality of conveying pipes 5. An oil outlet end 7 is fixedly arranged on the lower inner wall of the conveying cavity 4. A plurality of outflow ends 10 are fixedly arranged at the top of the inner shell 3, and a one-way valve is fixedly arranged on each outflow end 10 and is used for controlling the oil to flow upwards through the outflow end 10 in one direction. A flow path adjusting assembly 8 is arranged in the conveying cavity 4.

[0038] Specifically, the shell 1 is installed in an oil tank. When the fuel pump 2 is running, the oil is pumped into the pump liquid cavity 22 through the pump liquid paddle 23 rotating continuously. The oil in the pump liquid cavity 22 enters the cavity 24 through the flow-through hole and then enters the conveying cavity 4 through the conveying pipe 5. Finally, the oil enters the conveying chamber through the oil outlet end 7, so that the oil can flow upwards outside the pump shell 21 and the fuel pump 2 can be cooled and radiated, and the oil flowing upwards through the outflow end 10 is finally discharged through the oil outlet end 6.

[0039] Embodiment two: please refer to the attached Figure 4 -attached Figure 5, in order to make the fuel pump 2 also immersed in the fuel for heat dissipation when the fuel is sufficient, another structure is provided in the above embodiment: the flow path adjusting assembly 8 comprises annularly distributed one-way outflow valve 801 and electric push cylinder 802, the one-way outflow valve 801 is fixedly arranged at the top of the inner shell 3 and communicates with the delivery chamber 4, the electric push cylinder 802 is fixedly installed at the top of the outer shell 1, and the driving end of the electric push cylinder 802 is fixedly connected with the inner shell 3, wherein the lower side wall of the pump shell 21 and the inner shell 3 intersect, and the upper inner wall of the outer shell 1 and the inner shell 3 intersect, respectively, are provided with sealing rings for sealing to avoid liquid leakage, the electric push cylinder 802 is electrically connected with the control unit of the internal combustion engine, the electric push cylinder 802 is controlled to operate according to the current fuel amount collected by the oil level sensor, and the effect of automatically switching the flow path is achieved.

[0040] Specifically, the height of the inner shell 3 is adjusted by the electric push cylinder 802, the one-way outflow valve 801 is used for controlling the one-way outflow of the liquid in the delivery chamber 4, and after the oil enters the delivery chamber 4, it flows out through the one-way outflow valve 801 and the outflow end 10 to form a double flow path.

[0041] Please refer to the accompanying drawings Figure 5 - the accompanying drawings Figure 6 , the flow path adjusting assembly 8 further comprises a T-shaped sealing element 803 and a plurality of one-way inflow valves 811 and flow holes 812 distributed from top to bottom, the sealing element 803 is coaxially arranged in the inner part of the liquid outlet end 7, the outer wall of the sealing element 803 is sleeved with a support ring 804, the support ring 804 is fixedly installed on the inner wall of the liquid outlet end 7, the surface of the sealing element 803 is sleeved with a tension spring 805, the two ends of the tension spring 805 are fixedly connected with the sealing element 803 and the support ring 804 respectively, the one-way inflow valve 811 is fixedly arranged on the surface of the inner shell 3 and communicates with the delivery chamber, and the flow hole 812 is arranged on the lower surface of the inner shell 3 and communicates with the delivery chamber.

[0042] Specifically, the support ring 804 is used for supporting the sealing element 803, when the oil in the oil tank is sufficient, the sealing element 803 is resisted against the liquid outlet end 7 to form a closure under the action of the pulling force of the tension spring 805 and the impact force of the oil ejected by the delivery pipe 5, so as to close the liquid outlet end 7, so that the oil is not transported through the delivery chamber, and at the same time, the oil in the oil tank can enter the delivery chamber through the one-way inflow valve 811 and flow out through the flow hole 812, so as to dissipate heat for the fuel pump 2, compared with the prior art, the fuel pump 2 can be immersed in the fuel for heat dissipation when there is more fuel in the oil tank.

[0043] Please refer to the accompanying drawings Figure 6, the flow path adjusting assembly 8 further comprises an annular groove 806 formed in the lower outer wall of the pump shell 21, the groove 806 is in the shape of a trapezoid in cross section, one end of the sealing member 803 extends into the groove 806 through the inner shell 3, an annular protrusion 807 is fixedly arranged on the surface of the sealing member 803, a sealing pad is fixedly arranged on the side of the protrusion 807 facing the inner shell 3, a sealing head 813 is arranged directly below the flow hole 812 and fixedly installed on the bottom end of the pump shell 21.

[0044] Specifically, when the fuel in the fuel tank is insufficient, the inner shell 3 is lowered by the extension of the electric push cylinder 802, so that the sealing head 813 is inserted into the flow hole 812 to seal the flow hole 812, and when the inner shell 3 is lowered, the end of the sealing member 803 located in the groove 806 moves transversely along the slope of the groove 806, thereby moving the sealing member 803 transversely to open the liquid outlet end 7, so that the fuel enters the delivery chamber through the liquid outlet end 7 to cool the fuel pump 2, and when the sealing member 803 moves to the lowermost end of the slope of the groove 806, the protrusion 807 drives the sealing pad to tightly abut against the inner shell 3 to seal the penetration between the inner shell 3 and the sealing member 803, preventing liquid leakage.

[0045] Please refer to the accompanying drawings Figure 6 The flow path adjusting assembly 8 further comprises an annular partition plate 808 fixedly installed on the lower inner wall of the inner shell 3, a plurality of oil outlets 809 are formed in the upper surface of the partition plate 808, and a sealing plate 810 is arranged below the oil outlets 809 and rotationally connected to the partition plate 808 by a shaft.

[0046] Specifically, the inner shell 3 is divided by the partition plate 808, when the inner shell 3 is raised by the contraction of the electric push cylinder 802, the delivery chamber is closed at this time, the sealing plate 810 rotates downward under the action of gravity to open the oil outlets 809, and the fuel flows in the delivery cavity 4 through the oil outlets 809 passing through the partition plate 808, while the inner shell 3 is lowered, the delivery chamber is opened at this time, and the sealing plate 810 is pushed to rotate upward by the transverse movement of the sealing member 803, thereby closing the oil outlets 809, achieving automatic closing of the delivery cavity 4, so that the fuel flows through the delivery chamber, and the flow of the fuel can be switched according to the amount of fuel in the fuel tank, so that when the fuel in the fuel tank is sufficient, the fuel pump 2 can be immersed in the fuel for cooling, and when the fuel in the fuel tank is insufficient to cover the fuel pump 2, the fuel flows from the outer surface of the fuel pump 2 for cooling, thereby fully utilizing the fuel to cool the fuel pump 2 and improving the cooling effect of the fuel pump 2.

[0047] Please refer to the accompanying drawings Figure 5The outer side wall of the pump shell 21 is fixedly provided with a plurality of heat dissipation fins 25 in annular distribution, and the upper side wall of the pump shell 21 is fixedly provided with an annular support frame 26, which is in sliding connection with the inner shell 3 in the vertical direction.

[0048] Specifically, the support frame 26 is used to assist in supporting the pump shell 21, and the heat dissipation fins 25 are used to improve the heat dissipation effect.

[0049] Embodiment three: please refer to the attached Figure 7 -attached Figure 8 The lower portion of the pump shell 21 is provided with a filter assembly 9, which includes an outer ring 901 fixedly installed at the bottom end of the pump shell 21, and the inner side wall of the outer ring 901 is rotatably connected with a filter screen 902, a plurality of piston cylinders 903 are arranged above the filter screen 902, the conveying pipe 5 is a three-way pipe, one end of which is connected with the piston cylinder 903, the inside of the piston cylinder 903 is provided with a switching channel 904 connected with the conveying pipe 5, a sealing block 905 is slidably arranged in the switching channel 904, an elastic member 906 is fixedly connected with the side wall of the sealing block 905, the end of the elastic member 906 away from the sealing block 905 is fixedly connected with the switching channel 904, the upper surface of the switching channel 904 is provided with an inlet hole 907 and an outlet hole 908, respectively, and a counterweight piston block 909 is slidably arranged in the piston cylinder 903, a spray head 910 is fixedly arranged at the bottom end of the piston cylinder 903, and an annularly distributed blade 911 is fixedly arranged on the upper surface of the filter screen 902.

[0050] Specifically, the fuel is filtered through the filter screen 902, when the fuel pump 2 is running and the fuel is conveyed by the conveying pipe 5, part of the fuel enters the inside of the piston cylinder 903 through the conveying pipe 5, and under the action of hydraulic pressure, the sealing member 803 slides inward, thereby opening the inlet hole 907 and closing the outlet hole 908 to prevent the fuel from flowing out, and at the same time, the counterweight piston block 909 slides upward, when the fuel pump 2 stops running, the hydraulic pressure applied by the fuel disappears, the sealing block 905 slides to the lower side of the inlet hole 907 under the elastic force of the elastic member 906, thereby closing the inlet hole 907 and opening the outlet hole 908, and the counterweight piston block 909 slides downward under the action of its own gravity, and the fuel in the piston cylinder 903 is squeezed into the spray head 910 through the outlet hole 908, and the fuel is sprayed out of the spray head 910 and acts on the surface of the filter screen 902, thereby achieving the effect of automatically backflushing and cleaning the filter screen 902, and when the fuel is sprayed, it acts on the blade 911, so that the blade 911 drives the filter screen 902 to rotate, thereby expanding the backflushing range and improving the cleaning effect of the filter screen 902.

[0051] Working principle: The height of the inner shell 3 is adjusted by the electric cylinder 802. When the fuel tank is full, the electric cylinder 802 retracts and drives the inner shell 3 to rise. At this time, the delivery chamber is closed. The sealing plate 810 rotates downward under the action of gravity and opens the oil outlet 809. The fuel flows through the oil outlet 809, through the partition plate 808, and into the delivery chamber 4. The sealing element 803, under the action of the tension of the tension spring 805 and the impact force of the fuel sprayed out from the delivery pipe 5, presses against the liquid outlet 7 to form a closure, thereby closing the liquid outlet 7 and allowing the fuel to be delivered without passing through the delivery chamber. At the same time, the fuel in the fuel tank can enter the delivery chamber through the one-way inflow valve 811 and flow out through the flow hole 812, thereby cooling the fuel pump 2. Compared with the existing technology, when there is a lot of fuel in the fuel tank, the fuel pump 2 can be immersed in the fuel for cooling.

[0052] When the fuel level in the tank is insufficient, the electric cylinder 802 extends, causing the inner shell 3 to descend. At this time, the delivery chamber opens, and the sealing plate 810 rotates upward as the sealing element 803 moves laterally, thereby closing the oil outlet 809 and automatically closing the delivery chamber 4. Simultaneously, as the inner shell 3 descends, the sealing head 813 inserts into the flow hole 812 to seal it. At the same time, as the inner shell 3 descends, one end of the sealing element 803 located inside the slot 806 moves laterally along the inclined surface of the slot 806, thereby causing the sealing element 803 to move laterally and open the liquid outlet 7. This allows fuel to enter the delivery chamber through the liquid outlet 7 to cool the fuel pump 2. The fuel flow rate can be switched according to the amount of fuel in the tank. When there is a lot of fuel in the tank, the fuel can be immersed in the fuel for heat dissipation. When there is not enough fuel in the tank to cover the fuel pump 2, the fuel flows over the outer surface of the fuel pump 2 for heat dissipation and cooling. This fully utilizes the fuel to cool the fuel pump 2 and improves its heat dissipation effect.

[0053] When fuel pump 2 is operating and fuel is being delivered through delivery pipe 5, some fuel enters the piston cylinder 903 through delivery pipe 5. Under hydraulic pressure, fuel pushes seal 803 inward, thereby opening inlet port 907 and closing outlet port 908 to prevent fuel from flowing out. Simultaneously, fuel pushes counterweight piston block 909 upward. When fuel pump 2 stops operating, the hydraulic pressure applied to the fuel disappears, and seal block 905 slides below inlet port 907 under the elastic force of elastic element 906, thereby closing inlet port. 907 and open the liquid outlet 908. The counterweight piston block 909 slides downward under its own weight, squeezing the fuel inside the piston cylinder 903 into the nozzle 910 through the liquid outlet 908. The fuel is then sprayed out by the nozzle 910 and acts on the surface of the filter screen 902, achieving the effect of automatic backflushing and cleaning of the filter screen 902. When the fuel is sprayed out, it acts on the blade 911, causing the blade 911 to drive the filter screen 902 to rotate, thereby expanding the backflushing and cleaning range and improving the cleaning effect of the filter screen 902.

[0054] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be made without departing from the spirit and scope of the present application, which is defined by the following claims and their equivalents.

Claims

1. An automatic fuel distribution device for a train internal combustion engine, comprising a housing (1) and a fuel pump (2), wherein the fuel pump (2) comprises a pump housing (21), the lower end of the pump housing (21) is provided with a pump fluid chamber (22), and a continuously rotating pump fluid impeller (23) is provided inside the pump fluid chamber (22), and an oil outlet end (6) is fixedly provided on the top of the housing (1), characterized in that: The pump housing (21) has a chamber (24) located inside near the pump liquid chamber (22). The inner wall of the chamber (24) has a flow hole for connecting to the pump liquid chamber (22). The bottom end of the pump housing (21) is fixedly connected to the outer shell (1). An inner shell (3) is slidably arranged inside the outer shell (1). A hollow conveying chamber (4) is arranged inside the inner shell (3). A conveying chamber is formed between the inner shell (3) and the pump housing (21). The chamber (24) and the conveying chamber (4) are connected by several conveying pipes (5). An outlet end (7) is fixedly arranged on the lower inner wall of the conveying chamber (4). Several outflow ends (10) connected to the conveying chamber are fixedly arranged on the top of the inner shell (3). A one-way valve is fixedly arranged on the outflow end (10). A flow path regulating component (8) is installed inside the conveying chamber (4).

2. The automatic fuel distribution device for a train internal combustion engine according to claim 1, characterized in that: The flow path adjustment assembly (8) includes a one-way outflow valve (801) and an electric push cylinder (802) arranged in a ring. The one-way outflow valve (801) is fixedly installed on the top of the inner shell (3) and connected to the conveying chamber (4). The electric push cylinder (802) is fixedly installed on the top of the outer shell (1), and the driving end of the electric push cylinder (802) is fixedly connected to the inner shell (3).

3. The automatic fuel distribution device for a train internal combustion engine according to claim 1, characterized in that: The flow path adjustment assembly (8) also includes a T-shaped seal (803) and an annular slot (806). The slot (806) is opened on the lower outer wall of the pump housing (21). The cross-section of the slot (806) is trapezoidal. The seal (803) is coaxially arranged inside the liquid outlet end (7). The outer wall of the seal (803) is fitted with a support ring (804). The support ring (804) is fixedly installed on the inner wall of the liquid outlet end (7).

4. The automatic fuel distribution device for a train internal combustion engine according to claim 3, characterized in that: A tension spring (805) is fitted on the surface of the seal (803). The two ends of the tension spring (805) are fixedly connected to the seal (803) and the support ring (804) respectively. One end of the seal (803) penetrates the inner shell (3) and extends into the slot (806). An annular protrusion (807) is fixedly provided on the surface of the seal (803). A sealing gasket is fixedly provided on the side of the protrusion (807) facing the inner shell (3).

5. The automatic fuel distribution device for a train internal combustion engine according to claim 1, characterized in that: The flow path adjustment assembly (8) also includes an annular partition plate (808), which is fixedly installed on the lower inner wall of the inner shell (3). The upper surface of the partition plate (808) is provided with a plurality of oil outlets (809), and a sealing plate (810) is provided below the oil outlets (809). The sealing plate (810) is rotatably connected to the partition plate (808) via a shaft.

6. The automatic fuel distribution device for a train internal combustion engine according to claim 1, characterized in that: The flow path regulating assembly (8) also includes several one-way inflow valves (811) and flow holes (812) distributed from top to bottom. The one-way inflow valves (811) are fixedly installed on the surface of the inner shell (3) and are connected to the conveying chamber. The flow holes (812) are opened on the lower surface of the inner shell (3) and are connected to the conveying chamber. A sealing head (813) is provided directly below the flow holes (812). The sealing head (813) is fixedly installed at the bottom end of the pump casing (21).

7. The automatic fuel distribution device for a train internal combustion engine according to claim 1, characterized in that: The outer side wall of the pump casing (21) is fixedly provided with a number of heat dissipation fins (25) arranged in a ring, and the upper side wall of the pump casing (21) is fixedly provided with a ring-shaped support frame (26), which is slidably connected to the inner shell (3) in the vertical direction.

8. The automatic fuel distribution device for a train internal combustion engine according to claim 1, characterized in that: A filter assembly (9) is installed below the pump housing (21). The filter assembly (9) includes an outer ring (901), which is fixedly installed at the bottom of the pump housing (21). A filter screen (902) is rotatably connected to the inner wall of the outer ring (901). Several piston cylinders (903) are arranged above the filter screen (902). The delivery pipe (5) is a three-way pipe, and one end of the delivery pipe (5) is connected to the piston cylinder (903).

9. The automatic fuel distribution device for a train internal combustion engine according to claim 8, characterized in that: The piston cylinder (903) has a switching channel (904) connected to the delivery pipe (5) inside. A sealing block (905) is slidably arranged inside the switching channel (904). An elastic element (906) is fixedly connected to the side wall of the sealing block (905). The end of the elastic element (906) away from the sealing block (905) is fixedly connected to the switching channel (904). An inlet hole (907) and an outlet hole (908) are respectively opened on the upper surface of the switching channel (904). A counterweight piston block (909) is slidably arranged inside the piston cylinder (903). A nozzle (910) is fixedly arranged at the bottom end of the piston cylinder (903). A ring-shaped blade (911) is fixedly arranged on the upper surface of the filter screen (902).

10. A method for automatic fuel distribution in a train's internal combustion engine, characterized in that, The method for an automatic fuel distribution device for a train diesel engine according to any one of claims 1-9 includes the following steps: S1. Real-time acquisition of operating parameters of each internal combustion engine in the train through sensors, including speed, power, temperature and current fuel balance; S2. Fuel is delivered to each internal combustion engine through the fuel pump group, and the output flow and output pressure of each fuel pump (2) are collected by the flow sensor and pressure sensor respectively. S3. The collected internal combustion engine operating parameters, fuel pump (2) output flow and output pressure are transmitted to the control unit. S4. The control unit calculates the amount of fuel required by each internal combustion engine based on the preset fuel distribution algorithm, combined with the operating parameters of each internal combustion engine, the output flow rate and output pressure of the fuel pump. S5. The control unit adjusts the speed of the corresponding fuel pump (2) according to the calculated fuel quantity required by each internal combustion engine, so as to change the output flow of the fuel pump (2) and realize the automatic distribution of fuel.

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