An experimental method for an experimental system of a simulated workbench for engine testing

Abstract

The application discloses an experimental method of an experimental system of an analog workbench for engine testing, and relates to the technical field of engine experiment equipment, and comprises the following steps: S1: a test piece is arranged in a high-low temperature environment test box, and a high-speed motor is transmissionally connected to the test piece; S2: medium fuel in a high-temperature pressure oil tank is heated, and medium fuel in a low-temperature pressure oil tank is cooled; S3: after the medium fuel in the high-temperature pressure oil tank reaches a specified temperature, the medium fuel is pumped into the test piece, and the high-temperature medium fuel is output back to the high-temperature pressure oil tank after circulating in the test piece; S4: during the test, medium fuel in a refueling tank is pumped into the high-temperature pressure oil tank to realize a pressure boosting experiment on the medium fuel; S5: after low-temperature medium fuel in the low-temperature pressure oil tank reaches a specified temperature, the low-temperature medium fuel is pumped into the test piece; and S6: after the low-temperature experiment of the test piece is completed, the low-temperature medium fuel in the test piece is pumped back to the low-temperature pressure oil tank, and the application can supply fuel to the engine for testing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engine experiment equipment, in particular to an experimental method of an experimental system of an engine test simulation workbench. BACKGROUND

[0002] The performance of fuel in an engine at different temperatures is different, and in the use of an aero-engine, the engine needs to run in different temperature environments, so the working state of fuel at different temperatures needs to be tested. In the prior art, the engine needs to be separately arranged for different environments during testing, and then tested, which greatly increases the operation difficulty of simulation testing. At the same time, because the experimental process is long, the measured data is more susceptible to disturbance, and the accuracy of the experimental results is reduced. SUMMARY

[0003] The purpose of the present application is to provide an experimental method of an experimental system of an engine test simulation workbench to solve the technical problems of high operation difficulty and low accuracy of the experimental method in the prior art.

[0004] The present application provides an experimental system of an engine test simulation workbench, comprising a high-low temperature environment test box for providing a test environment and a test piece, an oil inlet and an oil outlet for circulating fuel are arranged on the test piece, a high-speed motor for driving the test piece is arranged at the side end of the high-low temperature environment test box, characterized in that it comprises a high-temperature pressure tank for storing high-temperature fuel and a low-temperature pressure tank for storing low-temperature fuel, the high-temperature pressure tank and the low-temperature pressure tank are provided with fuel supply pipelines and are respectively connected to the test piece, the high-temperature pressure tank and the low-temperature pressure tank are provided with fuel supply pipelines and are respectively connected to the oil inlet of the test piece, the high-temperature pressure tank and the low-temperature pressure tank are provided with return oil pipelines and are respectively connected to the oil outlet of the test piece, and the side end of the high-temperature pressure tank is connected with a fuel tank.

[0005] An experimental method of an experimental system of an engine test simulation workbench, comprising the following steps:

[0006] S1: arranging the test piece in the high-low temperature environment test box, driving connection of the high-speed motor to the test piece, and driving the test piece to simulate the state during operation by the high-speed motor;

[0007] S2: filling the high-temperature pressure tank and the low-temperature pressure tank with medium fuel, heating the medium fuel in the high-temperature pressure tank, and cooling the medium fuel in the low-temperature pressure tank;

[0008] S3: The medium fuel in the high-temperature pressure tank reaches the specified temperature and is pumped into the test piece through the oil supply pipeline, and the high-temperature medium fuel circulates in the test piece and is output back to the high-temperature pressure tank through the oil return pipeline;

[0009] S4: The medium fuel is injected into the filling tank, and the medium fuel in the filling tank is pumped into the high-temperature pressure tank during the test to realize the pressure increase experiment of the medium fuel;

[0010] S5: After the high-temperature environment test is completed, the high-temperature medium fuel is discharged, and after the low-temperature medium fuel in the low-temperature pressure tank reaches the specified temperature, it is pumped into the test piece through the oil supply pipeline;

[0011] S6: After the low-temperature experiment of the test piece is completed, the low-temperature medium fuel in the test piece is pumped back to the low-temperature pressure tank through the oil return pipeline.

[0012] An experimental method of an experimental system of a simulation workbench for engine testing, comprising the following steps:

[0013] S1: The test piece is arranged in the high-low temperature environment test box, and the high-speed motor is connected to the test piece in a transmission manner, and the state of the test piece during simulation operation is driven by the high-speed motor;

[0014] S2: The medium fuel is filled in the high-temperature pressure tank and the low-temperature pressure tank, the medium fuel in the high-temperature pressure tank is heated, and the medium fuel in the low-temperature pressure tank is cooled;

[0015] S3: The low-temperature medium fuel in the low-temperature pressure tank reaches the specified temperature and is pumped into the test piece through the oil supply pipeline;

[0016] S4: After the low-temperature experiment of the test piece is completed, the low-temperature medium fuel in the test piece is pumped back to the low-temperature pressure tank through the oil return pipeline.

[0017] S5: The medium fuel in the high-temperature pressure tank reaches the specified temperature and is pumped into the test piece through the oil supply pipeline, and the high-temperature medium fuel circulates in the test piece and is output back to the high-temperature pressure tank through the oil return pipeline;

[0018] S6: The medium fuel is injected into the filling tank, and the medium fuel in the filling tank is pumped into the high-temperature pressure tank during the test to realize the pressure increase experiment of the medium fuel.

[0019] Further, a heat exchange coil is arranged in the high-temperature pressure tank, an auxiliary oil tank in communication with the heat exchange coil is arranged at the side end of the high-temperature pressure tank, heat conducting oil is injected into the auxiliary oil tank, and an electric heater is arranged in the auxiliary oil tank.

[0020] Further, a refrigerating unit is arranged at the side end of the low-temperature pressure tank, and the refrigerating unit adopts a water-cooled heat exchanger to refrigerate the medium fuel in the low-temperature pressure tank.

[0021] Further, it further comprises S7: after the experiment is completed, the high-temperature medium fuel is rapidly cooled by the low-temperature medium fuel in the low-temperature pressure tank.

[0022] Further, the pipeline for delivering the medium fuel to the test piece part of the high-temperature pressure tank and the low-temperature pressure tank is an oil supply pipeline, and the oil supply pipeline part is provided with a pressure sensor, a mass flow meter and a temperature sensor.

[0023] Further, the pipeline for returning the medium fuel to the high-temperature pressure tank and the low-temperature pressure tank part after the circulation in the test piece is a return pipeline, and the return pipeline part is provided with a reversing valve, a proportional overflow valve and a nozzle.

[0024] Further, an oil supply filter is arranged in the oil supply pipeline, and the filtering precision is 3-7 μm,

[0025] Further, an oil return filter is arranged in the oil return pipeline, and the filtering precision is 8-12 μm.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] (1) In the present application, high-temperature pressure tanks and low-temperature pressure tanks are arranged respectively, different temperature medium fuels can be sent into the test piece for circulation according to the test requirements, so that the fuel supply conditions of the test piece at different temperatures can be simulated, and the fuel supply conditions of the test piece at different temperatures can be obtained in a short time, and the accuracy of the data is improved.

[0028] (2) In the present application, a refueling tank is arranged, the medium fuel is injected into the refueling tank, and the medium fuel in the refueling tank is pumped into the high-temperature pressure tank during the test to realize the pressure test of the medium fuel.

[0029] (3) In the present application, high-temperature environment test is carried out first, and then low-temperature environment test is carried out, so that the test piece can be cooled by the low-temperature medium fuel, the test piece cannot be safely taken out after the experiment is completed because it is still in a high-temperature state, and the safety of the present application is improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the following specific embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0031] Figure 1 It is a layout block diagram of the experimental system.

[0032] Figure 2 Layout block diagram of the oil return part in the experimental system;

[0033] Figure 3 Layout block diagram of the oil supply part in the experimental system;

[0034] Figure 4 Layout block diagram of the first embodiment in the experimental method;

[0035] Figure 5 Layout block diagram of the second embodiment in the experimental method. DETAILED DESCRIPTION

[0036] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, but not all the embodiments.

[0037] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application.

[0038] Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0039] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0041] The utility model provides an experimental system of simulation workbench for engine test, including the high and low temperature environment test box of providing test environment and the test piece, the test piece is provided with the oil inlet and oil outlet for fuel circulation, the side end of high and low temperature environment test box is provided with the high speed motor for driving test piece, the operation of simulation working state of test piece is driven through high speed motor, still include the high temperature pressure oil tank for storing the high temperature fuel and the low temperature pressure oil tank for storing the low temperature fuel, the oil supply pipeline is provided on the high temperature pressure oil tank and low temperature pressure oil tank and is communicated to test piece respectively, the oil supply pipeline is provided on the high temperature pressure oil tank and low temperature pressure oil tank and is communicated to the oil inlet on test piece respectively, the oil return pipeline is provided on the high temperature pressure oil tank and low temperature pressure oil tank and is communicated to the oil outlet on test piece respectively, the side end of high temperature pressure oil tank is communicated and is provided with the oil filling tank, the whole high temperature pressure oil tank is sealed, and the laboratory can fill the medium fuel into the oil filling tank, the medium fuel in the oil filling tank is pumped into the high temperature pressure oil tank through the oil pump, thereby improving the diversity and pertinence of the experiment.

[0042] For controlling the oil temperature in the high temperature pressure oil tank, the side end of the high temperature pressure oil tank is communicated with an auxiliary oil tank, a heating device is arranged in the auxiliary oil tank, and when in use, oil is filled in the auxiliary oil tank, and then the oil is heated to an appropriate temperature by the heating device, and the hot oil is pumped into the high temperature pressure oil tank, so as to realize accurate control of the oil in the high temperature pressure oil tank.

[0043] For controlling the oil temperature in the low temperature pressure oil tank, a refrigeration unit is arranged at the side end of the low temperature pressure oil tank, and the cooling end of the refrigeration unit is communicated to the low temperature pressure oil tank. The refrigeration unit uses a water-cooled heat exchanger. During the test process, the cooling system can be used to remove the heat generated by the test piece. After the test is completed, the water-cooled heat exchanger can be started to rapidly cool the heat-conducting oil, and the test medium fuel is also cooled.

[0044] In order to ensure the normal operation of the equipment, an oil supply filter is arranged on the oil supply pipeline of the high temperature pressure oil tank and the low temperature pressure oil tank, and the filtering precision of the oil supply filter is 5 μm. When the oil supply filter is blocked, the equipment can issue an alarm to remind the staff to handle it in time.

[0045] Preferably, an oil supply system is arranged on the oil supply pipeline of the high temperature pressure oil tank and the low temperature pressure oil tank, and the oil supply system includes a pressure sensor, a mass flow meter and a temperature sensor. The medium fuel is pumped out from the high temperature pressure oil tank or the low temperature pressure oil tank, filtered, monitored by the pressure sensor for the pressure of the fuel, monitored by the mass flow meter for the flow of the fuel, and monitored by the temperature sensor for the temperature of the fuel.

[0046] Preferably, the return oil pipeline on the high-temperature pressure oil tank and the low-temperature pressure oil tank is provided with a return oil system, the return oil system comprises a reversing valve, a proportional overflow valve, a nozzle and a return oil filter, the oil pressure in the return oil pipeline is detected through the proportional overflow valve, and when the oil pressure in the return oil pipeline is too high, fuel is sprayed out through the nozzle, so that the good operation of the equipment is ensured, and the returned fuel is filtered through the return oil filter.

[0047] As a first embodiment of the present application, an experimental method of a simulation workbench for engine test comprises the following steps:

[0048] S1: the test piece is arranged in a high-low temperature environment test box, a high-speed motor is connected to the test piece in a transmission mode, and the state of the test piece during simulation operation is driven by the high-speed motor;

[0049] S2: medium fuel is filled in the high-temperature pressure oil tank and the low-temperature pressure oil tank, the medium fuel in the high-temperature pressure oil tank is heated, and the medium fuel in the low-temperature pressure oil tank is cooled;

[0050] S3: after the medium fuel in the low-temperature pressure oil tank reaches a specified temperature, the medium fuel is pumped into the test piece, and the low-temperature medium fuel is output to the low-temperature pressure oil tank after circulating in the test piece;

[0051] S4: after the low-temperature environment test is completed, the low-temperature medium fuel is discharged, after the high-temperature medium fuel in the high-temperature pressure oil tank reaches a specified temperature, the high-temperature medium fuel is pumped into the test piece, and a high-temperature environment test is performed;

[0052] S5: medium fuel is filled in the filling tank, and the medium fuel in the filling tank is pumped into the high-temperature pressure oil tank during the test to realize a pressure boosting experiment on the medium fuel;

[0053] S6: after the high-temperature environment test of the test piece is completed, the high-temperature medium fuel in the test piece is pumped back to the high-temperature pressure oil tank.

[0054] S7: the high-temperature medium fuel is rapidly cooled through the low-temperature medium fuel in the low-temperature pressure oil tank.

[0055] In the present application, the oil pipe for conveying adopts DN80, the oil supply pressure is continuously adjustable at -0.088-1.2 MPa, the control precision is ±0.01 MPa, the return oil 1 pressure is continuously adjustable at 0.2-12 MPa, the control precision is ±0.05 MPa, the return oil 2 pressure is continuously adjustable at 0.2-12 MPa, the control precision is ±0.05 MPa, the return oil 3 pressure is continuously adjustable at 0.06-2 MPa, the control precision is ±0.01 MPa, the oil supply flow is not less than 8000 L / h, all the pipelines adopt stainless steel materials, and all the pipelines and oil tanks are heat-insulated and coated in order to ensure the heat exchange efficiency of the medium high-temperature test and prevent accidental scalding of the operators.

[0056] High-speed motor configuration 37kW explosion-proof high-speed motor provides spindle drive, using frequency converter for speed regulation, speed range is 0rpm~15000rpm (corresponding to the frequency converter output frequency is 0Hz~250Hz), can stepless speed regulation and positive and negative rotation adjustable, in the motor output shaft and the input shaft of the test product between stringing dynamic torque speed sensor, can measure the input torque of the test piece and the spindle speed at the same time, with special tooling (pump device) to connect the high-speed motor, torque sensor and test product on a platform.

[0057] The calculation formula involved in the table is as follows:

[0058] P0=Q·p / 60……………………………(1)

[0059] In the formula: P0-pump output power (kW);

[0060] Q-pump outlet flow (L / min);

[0061] p-pump outlet pressure (MPa);

[0062] P1=P0 / η……………………………(2)

[0063] In the formula: P0-pump output power (kW);

[0064] P1-required input power (kW);

[0065] η-total efficiency;

[0066] T=9550×P1 / n……………………………(3)

[0067] In the formula: T-required input torque (N·m);

[0068] P1-required input power (kW);

[0069] n-speed (rpm);

[0070] According to the above calculation, 37kW high-speed motor if the rated speed is set to 4750rpm, at this speed can provide the maximum torque = 9550×37×0.8 (motor efficiency) / 4750 = 59.5N·m. The maximum torque provided by the motor at 9000rpm is 31.4N·m, and the maximum torque provided at a speed of 15000rpm is 21.7N·m. Meet the test requirements of the test product.

[0071] The high and low temperature environment test box is used for simulating the external environment temperature of the working state of the test piece, and is designed in combination with a transmission system, so that a transmission shaft for driving the test piece can be extended into the environment box to realize installation and driving of the test piece.

[0072] The high-temperature pressure oil tank is provided with a heat exchange coil, a auxiliary oil tank in communication with the heat exchange coil is arranged at the side end of the high-temperature pressure oil tank, heat conducting oil is injected into the auxiliary oil tank, an electric heater is arranged in the auxiliary oil tank, and the electric heater is turned on before the test, so that the heat conducting oil heats the fuel in the main oil tank to the required temperature through the heat exchange coil.

[0073] A refrigeration unit is arranged at the side end of the low-temperature pressure oil tank, and a water-cooled heat exchanger is used to refrigerate the medium fuel in the low-temperature pressure oil tank.

[0074] An oil supply filter with a filtering accuracy of 3-7 μm is arranged in the oil supply pipeline, and an oil return filter with a filtering accuracy of 8-12 μm is arranged in the oil return pipeline, so that when the oil supply filter or the oil return filter is blocked, an alarm information is sent to remind the staff to handle it in time.

[0075] The pipeline for conveying the medium fuel from the high-temperature pressure oil tank and the low-temperature pressure oil tank to the test piece is an oil supply pipeline, and a pressure sensor, a mass flow meter and a temperature sensor are arranged in the oil supply pipeline, so that the pressure of the medium fuel is monitored by the pressure sensor, the flow of the medium fuel is monitored by the mass flow meter, and the temperature of the medium fuel is monitored by the temperature sensor.

[0076] The pipeline for returning the medium fuel back to the high-temperature pressure oil tank and the low-temperature pressure oil tank after the completion of circulation in the test piece is an oil return pipeline, a proportional overflow valve is arranged in the oil return pipeline to detect the oil pressure, and when the oil pressure is too high, the fuel is sprayed out through a nozzle.

[0077] As a second embodiment of the present application, the following steps are included:

[0078] S1: The test piece is arranged in the high and low temperature environment test box, and a high-speed motor is transmissionally connected to the test piece to drive the test piece to simulate the state during operation;

[0079] S2: The medium fuel is filled in the high-temperature pressure oil tank and the low-temperature pressure oil tank, the medium fuel in the high-temperature pressure oil tank is heated, and the medium fuel in the low-temperature pressure oil tank is cooled;

[0080] S3: After the medium fuel in the high-temperature pressure oil tank reaches the specified temperature, it is pumped into the test piece, and the high-temperature medium fuel is output back to the high-temperature pressure oil tank after circulating in the test piece;

[0081] S4: injecting medium fuel into the oil tank, and pumping the medium fuel in the oil tank into the high-temperature pressure tank to realize the pressurization experiment of the medium fuel during the test;

[0082] S5: discharging the high-temperature medium fuel after the high-temperature environment test, and pumping the low-temperature medium fuel in the low-temperature pressure tank into the test piece when the low-temperature medium fuel reaches a specified temperature;

[0083] S6: pumping the low-temperature medium fuel in the test piece back to the low-temperature pressure tank after the low-temperature experiment of the test piece is completed.

[0084] S7: rapidly cooling the high-temperature medium fuel by the low-temperature medium fuel in the low-temperature pressure tank after the low-temperature experiment is completed.

[0085] During the operation of the second embodiment, the high-temperature environment test is performed first, and then the low-temperature environment test is performed, so that the low-temperature medium fuel can enter the test piece to cool it, preventing the test piece from being in a high-temperature state after the experiment is completed and being unable to be safely taken out, thereby improving the safety of the application.

[0086] In the application, the oil pipe for conveying adopts DN80, the oil supply pressure is continuously adjustable at -0.088-1.2 MPa, the control accuracy is ±0.01 MPa, the return oil 1 pressure is continuously adjustable at 0.2-12 MPa, the control accuracy is ±0.05 MPa, the return oil 2 pressure is continuously adjustable at 0.2-12 MPa, the control accuracy is ±0.05 MPa, the return oil 3 pressure is continuously adjustable at 0.06-2 MPa, the control accuracy is ±0.01 MPa, the oil supply flow is not less than 8000 L / h, all the pipelines adopt stainless steel materials, and all the pipelines and oil tanks are heat-insulated and coated in order to ensure the heat exchange efficiency of the medium high-temperature test and prevent accidental scalding of the operator.

[0087] The high-speed motor is configured with a 37 kW explosion-proof high-speed motor to provide main shaft driving, a frequency converter is used for speed regulation, the speed range is 0 rpm-15000 rpm (corresponding to the frequency converter output frequency of 0 Hz-250 Hz), stepless speed regulation and forward and reverse rotation adjustment are realized, a dynamic torque speed sensor is connected in series between the motor output shaft and the input shaft of the test product, the input torque of the test piece and the main shaft speed can be measured at the same time, and a special tool (pump connecting device) is matched to connect the high-speed motor, the torque sensor and the test product on one platform.

[0088] The calculation formula involved in the table is as follows:

[0089] P0=Q·p / 60……………………………(1)

[0090] In the formula, P0 is the pump output power (kW);

[0091] Q-pump outlet flow (L / min)

[0092] p-pump outlet pressure (MPa)

[0093] P1=P0 / η (2)

[0094] P0-pump output power (kW)

[0095] P1-required input power (kW)

[0096] η-total efficiency

[0097] T=9550×P1 / n (3)

[0098] T-required input torque (N·m)

[0099] P1-required input power (kW)

[0100] n-speed (rpm)

[0101] According to the above calculation, if the rated speed of the 37kW high-speed motor is set to 4750rpm, the maximum torque that can be provided at this speed is 9550×37×0.8 (motor efficiency) / 4750=59.5N·m. The maximum torque that can be provided by the motor at 9000rpm is 31.4N·m, and the maximum torque that can be provided at a speed of 15000rpm is 21.7N·m. The test requirements of the test product are met.

[0102] The high-low temperature environmental test chamber is used to simulate the external environmental temperature of the test product in working state. The test chamber is designed in combination with the transmission system, and the transmission shaft driving the test product can be extended into the environmental chamber to realize the installation and driving of the test product. The test chamber selects a temperature speed variable test chamber of Galaxy Instrument model KWGD62III.

[0103] The high-temperature pressure oil tank is provided with a heat exchange coil, and an auxiliary oil tank communicating with the heat exchange coil is arranged at the side end of the high-temperature pressure oil tank. Heat conducting oil is injected into the auxiliary oil tank, and an electric heater is arranged in the auxiliary oil tank. The electric heater is turned on before the test, and the heat conducting oil heats the fuel in the main oil tank to the required temperature through the heat exchange coil.

[0104] The side end of the low-temperature pressure oil tank is provided with a refrigeration unit, and the refrigeration unit uses a water-cooled heat exchanger to refrigerate the medium fuel in the low-temperature pressure oil tank.

[0105] The pipeline for transporting medium fuel to the test piece part of the high-temperature pressure oil tank and the low-temperature pressure oil tank is a fuel supply pipeline, and the fuel supply pipeline part is provided with a pressure sensor, a mass flow meter and a temperature sensor, the pressure of the medium fuel is monitored by the pressure sensor, the flow of the medium fuel is monitored by the mass flow meter, and the temperature of the medium fuel is monitored by the temperature sensor.

[0106] The pipeline for returning the medium fuel to the high-temperature pressure oil tank and the low-temperature pressure oil tank after completing circulation in the test piece is a return pipeline, and a proportional overflow valve detects the oil pressure in the return pipeline, and when the oil pressure is too high, the fuel is sprayed out through a nozzle.

[0107] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An experimental method for an experimental system of a simulated test bench for engine testing, characterized in that, The experimental system of the engine testing simulation workbench includes a high and low temperature environment test chamber and a test specimen to provide the test environment. The test specimen is provided with an oil inlet and an oil outlet for fuel circulation. A high-speed motor for driving the test specimen is provided on the side of the high and low temperature environment test chamber. The system is characterized by including a high-temperature pressure tank for storing high-temperature fuel and a low-temperature pressure tank for storing low-temperature fuel. The high-temperature pressure tank and the low-temperature pressure tank are provided with oil supply pipelines and are respectively connected to the test specimen. The high-temperature pressure tank and the low-temperature pressure tank are provided with oil supply pipelines and are respectively connected to the oil inlet on the test specimen. The high-temperature pressure tank and the low-temperature pressure tank are provided with oil return pipelines and are respectively connected to the oil outlet on the test specimen. A filling tank is provided on the side of the high-temperature pressure tank. The experimental method includes the following steps: S1: The test specimen is placed in the high and low temperature environment test chamber, and the high-speed motor is connected to the test specimen to drive the test specimen to simulate the state of operation. S2: Add medium fuel oil to both the high-temperature pressure oil tank and the low-temperature pressure oil tank, heat the medium fuel oil in the high-temperature pressure oil tank, and cool the medium fuel oil in the low-temperature pressure oil tank. S3: After the medium fuel in the high-temperature pressure oil tank reaches the specified temperature, it is pumped into the test piece through the oil supply pipeline. After circulating in the test piece, the high-temperature medium fuel is output back to the high-temperature pressure oil tank through the oil return pipeline. S4: Inject medium fuel into the filling tank. During the test, pump the medium fuel in the filling tank into the high-temperature pressure tank to conduct a pressurization test on the medium fuel. S5: After completing the high-temperature environment test, discharge the high-temperature medium fuel oil. After the low-temperature medium fuel oil in the low-temperature pressure tank reaches the specified temperature, pump it into the test piece through the oil supply pipeline. S6: After completing the low-temperature test of the test specimen, the low-temperature medium fuel in the test specimen is pumped back to the low-temperature pressure tank through the return oil pipeline.

2. The experimental method of the experimental system for an engine testing simulation bench according to claim 1, characterized in that, The high-temperature pressure oil tank is equipped with a heat exchange coil, and an auxiliary oil tank connected to the heat exchange coil is installed on the side of the high-temperature pressure oil tank. Heat transfer oil is injected into the auxiliary oil tank, and an electric heater is installed inside the auxiliary oil tank.

3. The experimental method of the experimental system for an engine testing simulation bench according to claim 1, characterized in that, A refrigeration unit is installed on the side of the cryogenic pressure oil tank. The refrigeration unit uses a water-cooled heat exchanger to cool the fuel medium inside the cryogenic pressure oil tank.

4. The experimental method of the experimental system for an engine testing simulation bench according to claim 1, characterized in that, Also includes: S7: After the experiment is completed, the high-temperature fuel is rapidly cooled by using the low-temperature fuel in the low-temperature pressure tank.

5. The experimental method of the experimental system for an engine testing simulation bench according to claim 1, characterized in that, The oil supply pipeline is equipped with a pressure sensor, a mass flow meter, and a temperature sensor.

6. The experimental method of the experimental system for an engine testing simulation bench according to claim 1, characterized in that, The return oil pipeline section is equipped with a reversing valve, a proportional relief valve, and a nozzle.

7. The experimental method of the experimental system for an engine testing simulation bench according to claim 6, characterized in that, An oil supply filter with a filtration accuracy of 3–7 μm is installed in the oil supply line.

8. The experimental method of the experimental system for an engine testing simulation bench according to claim 7, characterized in that, A return oil filter with a filtration accuracy of 8–12 μm is installed in the return oil pipeline.

9. An experimental method for an experimental system of a simulated test bench for engine testing, characterized in that, The experimental system of the engine testing simulation workbench includes a high and low temperature environment test chamber and a test specimen to provide the test environment. The test specimen is provided with an oil inlet and an oil outlet for fuel circulation. A high-speed motor for driving the test specimen is provided on the side of the high and low temperature environment test chamber. The system is characterized by including a high-temperature pressure tank for storing high-temperature fuel and a low-temperature pressure tank for storing low-temperature fuel. The high-temperature pressure tank and the low-temperature pressure tank are provided with oil supply pipelines and are respectively connected to the test specimen. The high-temperature pressure tank and the low-temperature pressure tank are provided with oil supply pipelines and are respectively connected to the oil inlet on the test specimen. The high-temperature pressure tank and the low-temperature pressure tank are provided with oil return pipelines and are respectively connected to the oil outlet on the test specimen. A filling tank is provided on the side of the high-temperature pressure tank. The experimental method also includes the following steps: S1: The test specimen is placed in a high and low temperature environment test chamber, and a high-speed motor is connected to the test specimen to drive the test specimen to simulate the state of operation. S2: Add medium fuel oil to both the high-temperature pressure oil tank and the low-temperature pressure oil tank, heat the medium fuel oil in the high-temperature pressure oil tank, and cool the medium fuel oil in the low-temperature pressure oil tank. S3: After the cryogenic medium fuel in the cryogenic pressure tank reaches the specified temperature, it is pumped into the test specimen through the fuel supply pipeline; S4: After completing the low-temperature test of the test specimen, the low-temperature medium fuel in the test specimen is pumped back to the low-temperature pressure tank through the return oil pipeline. S5: After the medium fuel in the high-temperature pressure oil tank reaches the specified temperature, it is pumped into the test piece through the oil supply pipeline. After circulating in the test piece, the high-temperature medium fuel is output back to the high-temperature pressure oil tank through the oil return pipeline. S6: Inject medium fuel into the fuel tank. During the test, pump the medium fuel from the fuel tank into the high-temperature pressure tank to conduct a pressurization test on the medium fuel.

10. The experimental method of the experimental system for an engine testing simulation bench according to claim 9, characterized in that, The high-temperature pressure oil tank is equipped with a heat exchange coil, and an auxiliary oil tank connected to the heat exchange coil is installed on the side of the high-temperature pressure oil tank. Heat transfer oil is injected into the auxiliary oil tank, and an electric heater is installed inside the auxiliary oil tank.

11. The experimental method of the experimental system for an engine testing simulation bench according to claim 9, characterized in that, A refrigeration unit is installed on the side of the cryogenic pressure oil tank. The refrigeration unit uses a water-cooled heat exchanger to cool the fuel medium inside the cryogenic pressure oil tank.

12. The experimental method of the experimental system for an engine testing simulation bench according to claim 9, characterized in that, Also includes: S7: After the experiment is completed, the high-temperature fuel is rapidly cooled by using the low-temperature fuel in the low-temperature pressure tank.

13. The experimental method of the experimental system for an engine testing simulation bench according to claim 9, characterized in that, The oil supply pipeline is equipped with a pressure sensor, a mass flow meter, and a temperature sensor.

14. The experimental method of the experimental system for an engine testing simulation bench according to claim 9, characterized in that, The return oil pipeline section is equipped with a reversing valve, a proportional relief valve, and a nozzle.

15. The experimental method of the experimental system for an engine testing simulation bench according to claim 14, characterized in that, An oil supply filter with a filtration accuracy of 3–7 μm is installed in the oil supply line.

16. The experimental method of the experimental system for an engine testing simulation bench according to claim 14, characterized in that, A return oil filter with a filtration accuracy of 8–12 μm is installed in the return oil pipeline.

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