An oil consumption measurement device and its measurement method for a large horsepower diesel generator set under a multi-bubble state

Abstract

An oil consumption measurement device for a large-horsepower diesel generator set in a multi-bubble state, comprising an engine fuel supply and return system, an oil consumption measurement system, a constant-pressure fuel supply system, an external circulation temperature control system, and a constant-pressure air supply system; the engine return oil system includes a return oil ball valve, a return oil angle valve, a return oil heat exchanger, a return oil three-way ball valve, a large oil tank, and the oil consumption measurement system includes a fuel pump, an oil consumption bypass pressure regulating valve, a front-end pressure regulating valve, a small-flow angle valve, a small flowmeter, a large-flow angle valve, a large flowmeter, and a rear-end pressure regulating valve; the constant-pressure fuel supply system includes a small oil tank, a fuel supply fuel pump, a bypass pressure regulating valve, a gas eliminator tank, a gas eliminator tank float, and an inlet oil heat exchanger; the external circulation temperature control system includes an inlet water ball valve and a filter; an exhaust bubble device is provided to make the oil consumption measurement more accurate; a dual flowmeter is set to meet the pressure and temperature requirements of fuel supply under different working conditions; a stable air pressure device is provided to ensure the stable operation of components that require gas path control during operation.

Description

Technical Field

[0001] The present invention relates to a fuel consumption measuring device, specifically a fuel consumption measuring device and a measuring method for a large-horsepower diesel generator set in a multi-bubble state. Background Art

[0002] With the development of diesel generator sets, people have higher and higher requirements for their performance. However, the fuel consumption rate is a very important performance evaluation index for the comprehensive performance of the engine. Therefore, it is very necessary to accurately measure the fuel consumption of the engine under different working conditions; but during the measurement, due to the change of pressure under different working conditions, a large number of bubbles are generated, which has a great impact on the fuel consumption measurement data. At the same time, the recycling of the fuel supply makes the bubbles enter the engine again, which also affects other test data of the engine. The fuel consumption of large-horsepower diesel generator sets is large and a large number of bubbles are generated, and this problem is particularly obvious in large-horsepower diesel generator sets. Therefore, it is particularly urgent to manufacture a device system that can accurately measure the fuel consumption of the engine in a multi-bubble state. Summary of the Invention

[0003] In order to solve the above problems, the purpose of the present invention is to eliminate bubbles in the multi-bubble state of a large-horsepower diesel generator set, so as to accurately measure the fuel consumption value under its working conditions; at the same time, meet the fuel supply pressure and temperature of the engine under different working conditions.

[0004] The technical solution adopted by the present invention is:

[0005] A fuel consumption measuring device for a large-horsepower diesel generator set in a multi-bubble state, including an engine fuel supply and return system, a fuel consumption measuring system, a pressure-stabilizing fuel supply system, an external circulation temperature control system and a pressure-stabilizing gas supply system;

[0006] The engine return oil system includes an oil return ball valve, an oil return angle valve, an oil return heat exchanger, an oil return three-way ball valve, a large oil tank and related temperature sensors TS2, pressure sensors PS2 and a pressure gauge P1;

[0007] The fuel consumption measuring system includes a fuel pump, a fuel consumption bypass pressure regulating valve, a front-end pressure regulating valve, a small-flow angle valve, a small flowmeter, a large-flow angle valve, a large flowmeter, a rear-end pressure regulating valve and an oil return solenoid valve pressure gauge P2; on the pipeline between the large flowmeter and the rear-end pressure regulating valve, there are a pressure gauge P3, a pressure sensor PS5 and a temperature sensor TS5; on the fuel pump and the front-end pressure regulating valve, there is a pressure gauge P2; the large flowmeter and the small flowmeter) detect the flow rate and select the corresponding flow measurement according to the different power of the engine, providing a more accurate fuel consumption measurement value;

[0008] The described voltage-stabilized oil supply system includes a small oil tank, an oil supply fuel pump, a bypass pressure regulating valve, a gas removal tank, a gas removal tank float, an inlet oil heat exchanger, an inlet oil pressure regulating valve, an inlet oil three-way ball valve, an inlet oil angle valve, an inlet oil ball valve, and relevant pressure gauges P5, P6, a pressure sensor PS6, and a temperature sensor TS6;

[0009] The described external circulation temperature control system is provided with an inlet water ball valve, a filter, which respectively flow into a return oil heat exchanger and an inlet oil heat exchanger, from the return oil heat exchanger to a two-way proportional regulating valve, from the inlet oil heat exchanger to a three-way proportional regulating valve, and finally all flow out through an outlet water ball valve. At the same time, pressure gauges P8 and P9 are provided on the inlet and outlet pipelines.

[0010] The described voltage-stabilized gas supply is successively provided with an air inlet, a pneumatic triple unit, an air circuit filter, and an air storage tank; it is used to stabilize the air pressure to ensure the stable operation of the components that require air circuit control during equipment operation;

[0011] An oil unloading solenoid valve is provided between the large oil tank and the small oil tank.

[0012] Further, a tank smaller than the oil tank is built inside the large oil tank, and the height of the tank is less than that of the large oil tank. At the same time, the inlet oil pipeline is built into the bottom of the tank to increase its travel distance and fully remove the air bubbles.

[0013] Further, the large oil tank is provided with an oil filling port, a liquid level sight glass, a liquid level sensor, a temperature sensor TS4, and a pressure sensor PS4, which are used to detect the liquid level, temperature, and pressure of the oil tank; at the same time, a safety valve and an exhaust solenoid valve are provided on the oil tank for discharging air bubbles.

[0014] Further, the small oil tank is provided with a liquid level sight glass, an exhaust port, a temperature sensor TS3, and a liquid level gauge float. When the liquid level exceeds the set liquid level, the liquid level gauge float opens, and at the same time, the oil discharge solenoid valve opens, and the excess liquid level enters the large oil tank; when the liquid level is insufficient, it enters the small oil tank through the fuel consumption measurement part.

[0015] Further, temperature sensors TS5, pressure sensors PS5, and a pressure gauge P3 for detecting temperature and pressure are provided on the small flowmeter and the large flowmeter and the rear-end pressure regulating valve.

[0016] Further, pressure sensors PS2, temperature sensors TS2, and a pressure gauge P1 for detecting pressure and temperature are provided on the pipeline between the return oil angle valve and the return oil heat exchanger.

[0017] Further, a pressure gauge P2 for detecting pressure is provided on the fuel pump and the front-end pressure regulating valve.

[0018] Further, temperature sensor TS6 and pressure sensor PS6 are provided on the inlet oil angle valve and the inlet oil three-way ball valve, a pressure gauge P5 is provided at the rear end of the inlet oil fuel pump, and a pressure gauge P6 is provided at the rear end of the inlet oil pressure regulating valve 31.

[0019] The beneficial effects and features of the present invention are:

[0020] (1) By providing an exhaust tank body and a degassing tank, the bubbles are gradually separated from oil and gas during this stroke, and the bubbles are removed, reducing the inflow of bubbles into the flow meter and the engine, making the fuel consumption measurement more accurate.

[0021] (2) A dual flow meter (large flow meter, small flow meter) is provided, and corresponding flow measurement selection can be made according to the different power of the engine, which can provide a more accurate fuel consumption measurement value;

[0022] (3) Simultaneously meet the pressure and temperature requirements of fuel supply under different working conditions of the engine.

[0023] (4) Through the dual PID regulation of the external circulation, more accurate fuel supply temperature requirements are achieved

[0024] (5) A stable air pressure device is provided to ensure the stable operation of the components that require air path control during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural principle diagram of a preferred embodiment of the present invention.

[0026] In the figure, the symbol P represents a pressure gauge, and T represents a temperature sensor DETAILED DESCRIPTION OF THE INVENTION

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] Embodiment 1:

[0029] Please refer to Figure 1 , a fuel consumption measurement device under a multi-bubble state for a large-horsepower diesel generator set, characterized in that it includes an engine fuel supply and return system, a fuel consumption measurement system, a voltage-stabilized fuel supply system, an external circulation temperature control system, and a voltage-stabilized air supply system;

[0030] The engine return oil system includes a return oil ball valve 1, a return oil angle valve 2, a return oil heat exchanger 6, a return oil three-way ball valve 8, a large oil tank 11, and related temperature sensors TS2, pressure sensors PS2, and pressure gauge P1;

[0031] The described fuel consumption measurement system includes a fuel pump 13, a fuel consumption bypass pressure regulating valve 12, a front-end pressure regulating valve 15, a small-flow angle valve 16, a small flowmeter 17, a large-flow angle valve 18, a large flowmeter 19, a rear-end pressure regulating valve 23, a return oil solenoid valve 24, and a pressure gauge P2; a pressure gauge P3, a pressure sensor PS5, and a temperature sensor TS5 are provided on the pipeline between the large flowmeter 19 and the rear-end pressure regulating valve 23; a pressure gauge P2 is provided on the fuel pump 13 and the front-end pressure regulating valve 15; the large flowmeter 19 and the small flowmeter 17 perform flow detection and select corresponding flow measurements according to different engine power levels to provide a more accurate fuel consumption measurement value;

[0032] The described constant-pressure fuel supply system includes a small oil tank 9, a fuel supply fuel pump 25, a bypass pressure regulating valve 26, a degassing tank 29, a degassing tank float 28, an inlet oil heat exchanger 30, an inlet oil pressure regulating valve 31, an inlet oil three-way ball valve 33, an inlet oil angle valve 36, an inlet oil ball valve 37, and pressure gauges P5, P6, a pressure sensor PS6, and a temperature sensor TS6; it simultaneously meets the pressure and temperature requirements for engine fuel supply;

[0033] The described external circulation temperature control system includes an inlet water ball valve 44 and a filter 43; the fuel flowing into the return oil heat exchanger 6 and the inlet oil heat exchanger 30 respectively flows from the return oil heat exchanger 6 to the two-way proportional regulating valve 39, and from the inlet oil heat exchanger 30 to the three-way proportional regulating valve 40, and finally flows out through the outlet water ball valve 45. At the same time, pressure gauges P8 and P9 are provided on the inlet and outlet pipelines. Through the double PID regulation of the external circulation, a more accurate fuel supply temperature requirement is achieved;

[0034] The described constant-pressure air supply is successively provided with an air inlet 55, a pneumatic triple unit 54, an air circuit filter 53, and an air storage tank 52; it is used to stabilize the air pressure to ensure the stable operation of the components that require air circuit control during equipment operation;

[0035] An oil discharge solenoid valve 10 is provided between the large oil tank 11 and the small oil tank 9.

[0036] The large oil tank 11 is internally provided with a tank body 11-1 smaller than the oil tank, and the height of the tank body 11-1 is less than that of the large oil tank 11. At the same time, the inlet oil pipeline is built into the bottom of the tank body 11-1 to increase its stroke and fully discharge the bubbles.

[0037] The large oil tank 11 is provided with a fuel filling port 11-3, a liquid level viewing window 11-2, a liquid level sensor 11-6, a temperature sensor TS4, and a pressure sensor PS4 for detecting the liquid level, temperature, and pressure of the oil tank; at the same time, the oil tank is provided with a safety valve 11-7 and an exhaust solenoid valve 11-8 for discharging bubbles.

[0038] Example 2:

[0039] Different from Embodiment 1, for the convenience of staff observation, a liquid level sight glass 9-1, an exhaust port 9-2, a temperature sensor TS3, and a liquid level gauge float 9-4 are provided on the small oil tank 9. When the liquid level exceeds the set level, the liquid level gauge float 9-4 opens, and at the same time, the oil drain solenoid valve 10 opens, and the excess liquid level enters the large oil tank 11; when the liquid level is insufficient, it enters the small oil tank 9 through the fuel consumption measurement part.

[0040] Temperature sensors TS5, pressure sensors PS5, and pressure gauges P3 for detecting temperature and pressure are provided on the small flowmeter 17 and the large flowmeter 19 and the rear pressure regulating valve 23.

[0041] Pressure sensors PS2, temperature sensors TS2, and pressure gauges P1 for detecting pressure and temperature are provided on the pipeline between the oil return angle valve 2 and the oil return heat exchanger 6.

[0042] A pressure gauge P2 for detecting pressure is provided on the fuel pump 13 and the front pressure regulating valve 15.

[0043] A temperature sensor TS6 and a pressure sensor PS6 are provided on the oil inlet angle valve 36 and the oil inlet three-way ball valve 33. A pressure gauge P5 is provided at the rear end of the oil inlet fuel pump 25, and a pressure gauge P6 is provided at the rear end of the oil inlet pressure regulating valve 31.

[0044] The measurement method of the fuel consumption measurement device in the multi-bubble state of the above-mentioned large-horsepower diesel generator set includes the following steps:

[0045] Step 1: The fuel is connected from the oil depot to the equipment inlet ball valve 51, and the equipment inlet solenoid valve 47 is opened, and the fuel flows to the large oil tank 11; the liquid level sensor 11-6 in the large oil tank 11 detects the oil level. When it is lower than the upper limit position, the equipment inlet solenoid valve 47 is opened to continue filling the oil. When the oil is filled to the upper limit position, the equipment inlet solenoid valve 47 automatically closes;

[0046] Step 2: During the operation of the equipment, when the fuel is consumed to 1 / 3 of the oil level in the fuel tank (the position can be set), the equipment inlet solenoid valve 47 automatically opens and fills the oil to the upper limit position;

[0047] Step 3: In non-measurement test conditions, the fuel passes through the large oil tank 11 to the oil inlet three-way ball valve 33, the oil inlet angle valve 36, and the oil inlet ball valve 37 and enters the engine. Then the engine's return oil passes through the return oil ball valve 1, the return oil angle valve 2, and the return oil heat exchanger 6 for cooling and then enters the large oil tank 11 through the return oil three-way ball valve 8; the bubbles in the large oil tank 11 are eliminated and then enter the engine for circulation;

[0048] Step 4: In the low-flow stage, such as idling conditions, the fuel pump 13 pumps fuel from the large fuel tank 11 to the front pressure regulating valve 15. At the same time, the pressure is regulated through the fuel consumption bypass pressure regulating valve 12. The small-flow angle valve 16 is opened, and the fuel passes through the small flowmeter 17 and then goes to the rear pressure regulating valve 23 for pressure regulation. The return oil solenoid valve 24 is opened and the fuel enters the small fuel tank 9. Then, the fuel supply fuel pump 25 pumps the fuel out of the small fuel tank 9, and the pressure is regulated through the supply bypass pressure regulating valve 26. The fuel enters the degassing tank 29, is degassed again through the degassing tank float 28, and then passes through the inlet heat exchanger 30. The external circulation is regulated through the three-way proportional regulating valve 40 for temperature control. Then, it passes through the inlet pressure regulating valve 31, the inlet three-way ball valve 33, the inlet angle valve 36, and the inlet ball valve 37 and enters the engine;

[0049] Step 5: The return oil of the engine passes through the return oil ball valve 1, the return oil angle valve 2, and the return oil heat exchanger 6 for temperature reduction, and then enters the small fuel tank 9 through the return oil three-way ball valve 8 to eliminate air bubbles. Then, it is pumped into the engine by the fuel supply fuel pump 25 for circulation; the return oil does not pass through the flowmeter;

[0050] Step 6: In the high-flow stage, the fuel pump 13 pumps fuel from the large fuel tank 11 to the front pressure regulating valve 15. At the same time, the pressure is regulated through the fuel consumption bypass pressure regulating valve 12. The large-flow angle valve 18 is opened, and the fuel passes through the large flowmeter 19 and then goes to the rear pressure regulating valve 23 for pressure regulation. The return oil solenoid valve 24 is opened and the fuel enters the small fuel tank 9. Then, the fuel supply fuel pump 25 pumps the fuel out of the small fuel tank 9, and the pressure is regulated through the bypass pressure regulating valve 26. The fuel enters the degassing tank 29, is degassed through the degassing float 28, and then passes through the inlet heat exchanger 30. The external circulation is regulated through the three-way proportional regulating valve 40 for temperature control. Then, it passes through the inlet pressure regulation 31, the inlet three-way ball valve 33, the inlet angle valve 36, and the inlet ball valve 37 and enters the engine;

[0051] Step 9: The return oil of the engine passes through the return oil ball valve 1, the return oil angle valve 2, and the return oil heat exchanger 6 for temperature reduction, and then enters the small fuel tank 9 through the return oil three-way ball valve 8 to eliminate air bubbles. Then, it is pumped into the engine by the fuel supply fuel pump 25 for circulation; the return oil does not pass through the flowmeter;

[0052] Step 7: The cooling of the return oil is mainly through the external circulation cooling of the return oil heat exchanger 6. By adjusting the opening degree of the two-way proportional regulating valve 39 controlled by PID, the temperature control effect can be achieved;

[0053] Step 8: The temperature control of the fuel supply is mainly carried out through the inlet heat exchanger 30 and the three-way proportional regulating valve 40, and the fuel is not directly heated;

[0054] Step 9: When the oil level in the small fuel tank 9 exceeds the upper limit value, the liquid level float 9-4 opens the drain solenoid valve 10, and the fuel is discharged into the large fuel tank 11.

[0055] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the structural relationship and principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An oil consumption measurement device for a large - horsepower diesel generator set under a multi - bubble state, Characterized in that: It includes an engine fuel supply and return system, an oil consumption measurement system, a constant - pressure fuel supply system, an external - circulation temperature control system, and a constant - pressure air supply system; The engine fuel supply and return system includes a return - oil ball valve (1), a return - oil angle valve (2), a return - oil heat exchanger (6), a return - oil three - way ball valve (8), a large oil tank (11), and related temperature sensors TS2(3), pressure sensors PS2(4), and pressure gauge P1(5); The oil consumption measurement system includes a fuel pump (13), an oil - consumption bypass pressure - regulating valve (12), a front - end pressure - regulating valve (15), a small - flow angle valve (16), a small flowmeter (17), a large - flow angle valve (18), a large flowmeter (19), a rear - end pressure - regulating valve (23), a return - oil solenoid valve (24), and pressure gauge P2(14); on the pipeline between the large flowmeter (19) and the rear - end pressure - regulating valve (23), there are a pressure gauge P3(20), a pressure sensor PS5(21), and a temperature sensor TS5(22); on the fuel pump (13) and the front - end pressure - regulating valve (15), there is a pressure gauge P2(14); the large flowmeter (19) and the small flowmeter (17) detect the flow rate and select the corresponding flow rate measurement according to the different power of the engine to provide a more accurate fuel - consumption measurement value; The constant - pressure fuel supply system includes a small oil tank (9), an inlet fuel pump (25), a bypass pressure - regulating valve (26), a gas - elimination tank (29), a gas - elimination float (28), an inlet heat exchanger (30), an inlet pressure - regulating valve (31), an inlet three - way ball valve (33), an inlet angle valve (36), an inlet ball valve (37), and related pressure gauges P5(27), pressure gauge P6(32), pressure sensor PS6(34), temperature sensor TS6(35); The external - circulation temperature control system is provided with an inlet water ball valve (44), a filter (43), and the cooling water flows into the return - oil heat exchanger (6) and the inlet heat exchanger (30) respectively, from the return - oil heat exchanger (6) to the two - way proportional regulating valve (39), from the inlet heat exchanger (30) to the three - way proportional regulating valve (40), and finally flows out through the outlet water ball valve (45). At the same time, there are a pressure gauge P8(41) and a pressure gauge P9(42) on the inlet and outlet pipelines; the constant - pressure air supply system is successively provided with an air inlet (55), a pneumatic triple unit (54), an air - path filter (53), and an air storage tank (52); it is used to stabilize the air pressure to ensure the stable operation of the components that require air - path control during equipment operation; There is a drain solenoid valve (10) between the large oil tank (11) and the small oil tank (9); The large oil tank (11) has a tank body (11 - 1) smaller than its own oil tank, and the height of the tank body (11 - 1) is less than that of the large oil tank (11). At the same time, the inlet pipeline is built into the bottom of the tank body (11 - 1) to increase its stroke and enable the bubbles to be fully discharged; Each large oil tank (11) is provided with a fuel filling port (11-3), a first liquid level viewing window (11-2), a liquid level sensor (11-6), a temperature sensor TS4 (11-5), and a pressure sensor PS4 (11-4) for detecting the liquid level, temperature, and pressure of the oil tank. At the same time, a safety valve (11-7) and an exhaust solenoid valve (11-8) are provided on the oil tank for discharging air bubbles.

2. The fuel consumption measuring device for a large-horsepower diesel generator set in a multi-bubble state according to claim 1, characterized in that: Each small oil tank (9) is provided with a second liquid level viewing window (9-1), an exhaust port (9-2), a temperature sensor TS3 (9-3), and a liquid level float (9-4). When the liquid level exceeds the set liquid level, the liquid level float (9-4) opens, and at the same time, the oil drain solenoid valve (10) opens, and the excess liquid level enters the large oil tank (11); when the liquid level is insufficient, it enters the small oil tank (9) through the fuel consumption measuring part.

3. The fuel consumption measuring device for a large-horsepower diesel generator set in a multi-bubble state according to claim 1, characterized in that: Temperature sensors TS5 (22), pressure sensors PS5 (21), and pressure gauges P3 (20) for detecting temperature and pressure are provided on the small flowmeter (17) and the large flowmeter (19) and the rear pressure regulating valve (23).

4. The fuel consumption measuring device for a large-horsepower diesel generator set in a multi-bubble state according to claim 1, characterized in that: Pressure sensors PS2 (4), temperature sensors TS2 (3), and pressure gauges P1 (5) for detecting pressure and temperature are provided on the pipeline between the oil return angle valve (2) and the oil return heat exchanger (6).

5. The fuel consumption measuring device for a large-horsepower diesel generator set in a multi-bubble state according to claim 1, characterized in that: A pressure gauge P2 (14) for detecting pressure is provided on the fuel pump (13) and the front pressure regulating valve (15).

6. The fuel consumption measuring device for a large-horsepower diesel generator set in a multi-bubble state according to claim 1, characterized in that: A temperature sensor TS6 (35) and a pressure sensor PS6 (34) are provided on the oil inlet angle valve (36) and the oil inlet three-way ball valve (33). A pressure gauge P5 (27) is provided at the rear end of the oil inlet fuel pump 25, and a pressure gauge P6 (32) is provided at the rear end of the oil inlet pressure regulating valve (31).

7. The measuring method of the fuel consumption measuring device for a large-horsepower diesel generator set in a multi-bubble state according to any one of claims 1-6, characterized in that it includes the following steps: Step 1: Fuel is connected from the oil depot to the equipment inlet ball valve (51), the equipment inlet solenoid valve (47) is opened, and the fuel flows to the large oil tank (11); the liquid level sensor (11-6) in the large oil tank (11) detects the oil level. When it is lower than the upper limit position, the equipment inlet solenoid valve (47) is opened to continue filling the oil. When the oil is filled to the upper limit position, the equipment inlet solenoid valve (47) automatically closes; Step 2: During the operation of the equipment, when the fuel is consumed to 1 / 3 of the oil level in the fuel tank, the equipment inlet solenoid valve (47) automatically opens and fills the oil to the upper limit position; Step 3: During non-measurement test conditions, fuel passes from the large oil tank (11) through the inlet three-way ball valve (33), inlet angle valve (36), and inlet ball valve (37) into the engine. Then, the engine's return oil passes through the return ball valve (1), return angle valve (2), and return oil heat exchanger (6) for temperature reduction and then enters the large oil tank (11) through the return three-way ball valve (8). Air bubbles are removed inside the large oil tank (11), and then it enters the engine for circulation. Step 4: In the small flow rate stage, the fuel pump (13) pumps fuel from the large oil tank (11) to the front pressure regulating valve (15), and at the same time, the pressure is regulated through the fuel consumption bypass pressure regulating valve (12). The small flow rate angle valve (16) is opened, and after passing through the small flow meter (17), it goes to the rear pressure regulating valve (23) for pressure regulation. The return oil solenoid valve (24) is opened to enter the small oil tank (9). Then, the inlet fuel pump (25) pumps the fuel out of the small oil tank (9), regulates the pressure through the supply oil bypass pressure regulating valve (26), enters the air elimination tank (29), eliminates air again through the air elimination float (28), then passes through the inlet oil heat exchanger (30), regulates the external circulation through the three-way proportional regulating valve (40) for temperature control, and then passes through the inlet pressure regulating valve (31), inlet three-way ball valve (33), inlet angle valve (36), and inlet ball valve (37) to enter the engine. Step 5: The engine's return oil passes through the return ball valve (1), return angle valve (2), and return oil heat exchanger (6) for temperature reduction, then enters the small oil tank (9) through the return three-way ball valve (8), has air bubbles removed, and then is pumped into the engine for circulation by the inlet fuel pump (25). The return oil does not pass through the flow meter. Step 6: In the large flow rate stage, the fuel pump (13) pumps fuel from the large oil tank (11) to the front pressure regulating valve (15), and at the same time, the pressure is regulated through the fuel consumption bypass pressure regulating valve (12). The large flow rate angle valve (18) is opened, and after passing through the large flow meter (19), it goes to the rear pressure regulating valve (23) for pressure regulation. Subsequently, the fuel enters the small oil tank (9) from the opened return oil solenoid valve (24). Then, the inlet fuel pump (25) pumps the fuel out of the small oil tank (9), regulates the pressure through the bypass pressure regulating valve (26), enters the air elimination tank (29), eliminates air through the air elimination float (28), then passes through the inlet oil heat exchanger (30), regulates the external circulation through the three-way proportional regulating valve (40) for temperature control, and then passes through the inlet pressure regulating valve (31), inlet three-way ball valve (33), inlet angle valve (36), and inlet ball valve (37) to enter the engine. Step 7: The engine's return oil passes through the return ball valve (1), return angle valve (2), and return oil heat exchanger (6) for temperature reduction, then enters the small oil tank (9) through the return three-way ball valve (8), has air bubbles removed, and then is pumped into the engine for circulation by the inlet fuel pump (25). The return oil does not pass through the flow meter. Step 8: The cooling of the return oil is mainly through the external circulation cooling of the return oil heat exchanger (6). By adjusting the opening degree of the PID-controlled two-way proportional regulating valve (39), the temperature control effect can be achieved. Step Nine: The temperature control of fuel supply is mainly carried out through the inlet oil heat exchanger (30) and the three-way proportional regulating valve (40), without directly heating the fuel. Step Ten: When the oil volume in the small oil tank (9) exceeds the upper limit value, the liquid level float (9-4) feeds back a signal to the control end, and the control end opens the oil drain solenoid valve (10) to discharge the fuel into the large oil tank (11).

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