Ultrahigh-temperature medium test device and method for aero-engine nozzle oil source pump

Abstract

The invention discloses an aero-engine nozzle oil source pump ultra-high temperature medium test device and method, and relates to the technical field of aero-engine tests. The main fuel oil supply system of the test system can provide inlet pressure for a test product through two modes of oil tank pressurization and booster pump pressurization, the oil pressure of the test product in actual work is simulated, and the test states of ultrahigh temperature of an inlet medium and normal temperature of an outlet medium of a fuel oil pump are ensured through rapid heating and two-stage cooling modes; and potential safety hazards caused by high-temperature oil are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft engine testing, and in particular relates to an ultra-high temperature medium testing device and method for an aircraft engine nozzle oil source pump. Background Art

[0002] During the development of aircraft engine fuel pumps, it is necessary to conduct ultra-high temperature tests on the fuel medium to simulate the ultra-high temperature requirements of the fuel medium under the actual operating conditions of the engine nozzle fuel source pump. At present, the industry generally adopts the test mode of overall heating and cooling of the fuel medium, and its medium temperature cannot meet the requirements of ultra-high temperature tests. Summary of the invention

[0003] Based on the above background, the present invention provides an ultra-high temperature test system and method for the fuel medium of an aircraft engine nozzle oil source pump, which realizes the test requirements for ultra-high temperature of the fuel inlet.

[0004] In view of this, according to one aspect of an embodiment of the present invention, there is provided an ultra-high temperature medium test device for an aircraft engine nozzle oil source pump, comprising: an oil tank 1, a motor 2, a boost pump 3, a throttle valve 5, a first plate heat exchanger 7, a mold temperature controller 8, a first temperature sensor 9, a first pressure sensor 10, a product pump 11, a second temperature sensor 12, a second pressure sensor 13, a shell and tube heat exchanger 14, a pressure regulating valve 16, a diverter valve 18, and a second plate heat exchanger 19; wherein the boost pump 3 is connected in series with the oil tank 1 to supply oil to the product pump 11, and is connected in parallel with the throttle valve 5 to transport the remaining part of the oil back to the oil tank 1, and the motor 2 and the throttle valve 5 are jointly controlled to communicate with the first pressure sensor 19. The sensor 10 performs closed-loop control to increase the fuel pressure in the fuel tank 1 to the required pressure; the pressurized oil passes through the first plate heat exchanger 7 for heat exchange, and the mold temperature controller 8 and the first temperature sensor 9 are used to perform closed-loop regulation and control on the first plate heat exchanger 7 to increase the inlet oil temperature to the required temperature of the product pump 11; the product pump 11 is connected in series with the shell and tube heat exchanger 14, the pressure regulating valve 16, the diverter valve 18 and the second plate heat exchanger 19 in series in sequence, and the second pressure sensor 11 and the pressure regulating valve 16 are closed-loop controlled to control the outlet pressure of the product pump 11; the shell and tube heat exchanger 14 and the second temperature sensor 13 are closed-loop controlled to maintain the outlet oil temperature at the outlet temperature required by the product pump 11.

[0005] Optionally, a first overflow valve 4 is further included, which is connected in series between the boost pump 3 and the throttle valve 5 .

[0006] Optionally, a one-way valve 6 is further included, which is connected in series between the throttle valve 5 and the first plate heat exchanger 7 .

[0007] Optionally, a second overflow valve 15 is further included, which is connected in parallel with the pressure regulating valve 16 .

[0008] Optionally, a flow meter 17 is further included, which is connected in series between the pressure regulating valve 16 and the diverter valve 18 .

[0009] According to another aspect of an embodiment of the present invention, there is also provided a method for testing ultra-high temperature media of an aircraft engine nozzle oil source pump, using any of the above-mentioned devices, including: controlling the opening of the pressure regulating valve 16, setting the initial opening to be fully open as K1=1, adjusting the value of K1 to between 5% and 95% to control the outlet pressure, and performing closed-loop control with the second pressure sensor 11, thereby controlling the outlet pressure of the product pump 11.

[0010] Optionally, the value of K1 is adjusted to 90% to 95%, which is an oil tank circulation mode, and the oil passes through the oil tank 1 during the circulation process.

[0011] Optionally, the value of K1 is adjusted to 5% to 10%, which is a pipeline circulation mode, and the oil does not pass through the oil tank 1 during the circulation process.

[0012] By rapidly heating and multi-stage cooling the fuel at the inlet and outlet of the test piece, the inlet fuel medium of the test piece is super-high temperature, and the outlet fuel medium temperature decreases step by step, which reduces the storage volume of super-high temperature fuel on the test bench, reduces the test risk, and provides a test method for the super-high temperature working test of the fuel medium of the engine nozzle oil source pump. A medium super-high temperature test system is designed to meet the test requirements of the super-high temperature of the inlet medium of the test piece by rapidly heating the inlet fuel medium, and gradually cools the outlet fuel medium to reduce the storage volume of super-high temperature fuel.

[0013] The present invention is an ultra-high temperature medium test system for an aircraft engine nozzle oil source pump. The main fuel supply system of the system can provide inlet pressure for the test product by means of oil tank pressurization and booster pump pressurization, simulating the oil pressure of the test product when it is actually working. The oil supply system is composed of an inlet pressure regulating module and an inlet temperature regulating module connected in series. The pressure module is composed of a centrifugal booster pump group, an inlet pressure measuring module, a bypass overflow valve, and a check valve is added to prevent oil backflow; the temperature module is composed of a temperature sensor, a plate heat exchanger and a mold temperature controller. The pressure of the outlet pipeline system is closed-loop controlled by a high-precision pressure regulating valve, and its temperature control method is different from that of a conventional nozzle oil source pump test bench. Since the area most prone to problems in ultra-high temperature tests is the high-temperature and high-pressure pipeline in the outlet pipeline system, and the technical requirements for the high-precision pressure regulating valve in the pipeline are extremely strict. In order to meet the technical indicators of ultra-high temperature tests and reduce safety risks in tests, a first-level high-pressure cooling module is added to the outlet pipeline system of the test product, thereby reducing the storage volume of high-temperature and high-pressure oil and greatly reducing the technical requirements of the high-precision pressure regulating valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1This is a schematic structural diagram of an ultra-high temperature medium test device for an aircraft engine nozzle oil source pump according to an embodiment of the present invention;

[0015] Figure 2 It is a schematic diagram of the principle of a hydraulic control method for an ultra-high temperature medium test device for an aircraft engine nozzle oil source pump according to an embodiment of the present invention;

[0016] Description of reference numerals:

[0017] 1-Oil tank, 2-Motor, 3-Boosting pump, 4-Overflow valve, 5-Throttle valve, 6-Check valve, 7-Plate heat exchanger, 8-Mold temperature controller, 9-Temperature sensor, 10-Pressure sensor, 11-Product pump, 12-Temperature sensor, 13-Pressure sensor, 14-Shell and tube heat exchanger, 15-Overflow valve, 16-Pressure regulating valve, 17-Flow meter, 18-Diverter valve, 19-Plate heat exchanger. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] According to one aspect of an embodiment of the present invention, an ultra-high temperature medium test device for an aircraft engine nozzle oil source pump is provided, comprising: an oil tank 1, a motor 2, a boost pump 3, a throttle valve 5, a first plate heat exchanger 7, a mold temperature controller 8, a first temperature sensor 9, a first pressure sensor 10, a product pump 11, a second temperature sensor 12, a second pressure sensor 13, a shell and tube heat exchanger 14, a pressure regulating valve 16, a diverter valve 18, and a second plate heat exchanger 19; wherein the boost pump 3 is connected in series with the oil tank 1 to supply oil to the product pump 11, and is connected in parallel with the throttle valve 5 to transport the remaining part of the oil back to the oil tank 1, and the motor 2 and the throttle valve 5 are jointly controlled to communicate with the first pressure sensor 10 performs closed-loop control to increase the fuel pressure in the fuel tank 1 to the required pressure; the pressurized oil passes through the first plate heat exchanger 7 for heat exchange, and the mold temperature controller 8 and the first temperature sensor 9 are used to perform closed-loop regulation and control on the first plate heat exchanger 7 to increase the inlet oil temperature to the required temperature of the product pump 11; the product pump 11 is connected in series with the shell and tube heat exchanger 14, the pressure regulating valve 16 and the diverter valve 18 and the second plate heat exchanger 19 in series in sequence, and the second pressure sensor 11 and the pressure regulating valve 16 are closed-loop controlled to control the outlet pressure of the product pump 11; the shell and tube heat exchanger 14 and the second temperature sensor 13 are closed-loop controlled to maintain the outlet oil temperature at the outlet temperature required by the product pump 11.

[0020] Furthermore, it also includes a first overflow valve 4, which is connected in series between the boost pump 3 and the throttle valve 5 to ensure that the pipeline system will not be over-pressurized.

[0021] Furthermore, a one-way valve 6 is included, which is connected in series between the throttle valve 5 and the first plate heat exchanger 7 to ensure that the oil passing through the small circulation will not affect the flow direction of the inlet pipeline.

[0022] Furthermore, a second overflow valve 15 is included, which is connected in parallel with the pressure regulating valve 16 to ensure that the pipeline system will not be over-pressurized.

[0023] Furthermore, a flow meter 17 is included, which is connected in series between the pressure regulating valve 16 and the diverter valve 18 .

[0024] According to another aspect of an embodiment of the present invention, there is also provided a method for testing ultra-high temperature media of an aircraft engine nozzle oil source pump, using any of the above-mentioned devices, including: controlling the opening of the pressure regulating valve 16, setting the initial opening to be fully open as K1=1, adjusting the value of K1 to between 5% and 95% to control the outlet pressure, and performing closed-loop control with the second pressure sensor 11, thereby controlling the outlet pressure of the product pump 11.

[0025] Furthermore, the value of K1 is adjusted to 90% to 95%, which is the oil tank circulation mode, and the oil passes through the oil tank 1 during the circulation process.

[0026] Furthermore, the value of K1 is adjusted to 5% to 10%, which is a pipeline circulation mode, and the oil does not pass through the oil tank 1 during the circulation process.

[0027] Example

[0028] like Figure 1-2 As shown, the test system consists of an oil tank 1, a motor 2, a booster pump 3, a relief valve 4, a throttle valve 5, a check valve 6, a first plate heat exchanger 7, a mold temperature controller 8, a first temperature sensor 9, a first pressure sensor 10, a product pump 11, a second temperature sensor 12, a second pressure sensor 13, a shell and tube heat exchanger 14, a relief valve 15, a pressure regulating valve 16, a flow meter 17, a diverter valve 18, and a second plate heat exchanger 19.

[0029] The inlet pipeline system provides the test medium fuel for the test product and ensures the inlet pressure and temperature of the product. The inlet pipeline system is mainly composed of a fuel tank 1, a motor 2, a booster pump 3, a relief valve 4, a throttle valve 5, a check valve 6, a first plate heat exchanger 7, a mold temperature controller 8, a first temperature sensor 9 and a first pressure sensor 10.

[0030] The closed-loop control of the inlet pressure is realized by the oil tank 1, the motor 2, the booster pump 3, the first overflow valve 4, the throttle valve 5 and the first pressure sensor 10. The hydraulic principle is that the booster pump 3 is connected in series with the oil tank 1 to supply the oil to the product pump 11, and is connected in parallel with the throttle valve 5 to transport the remaining oil back to the oil tank 1. The control principle is to increase the fuel in the oil tank 1 to the required pressure through the joint control of the variable frequency drive of the motor 2 and the throttle valve 5, and perform closed-loop control with the first pressure sensor 10, thereby achieving the pressure requirement of the product pump inlet pipeline.

[0031] The inlet temperature closed-loop control system is mainly composed of the first plate heat exchanger 7, the mold temperature controller 8 and the first temperature sensor 9. The control principle is that the pressurized oil is heat exchanged through the first plate heat exchanger 7, and this heating process adopts a closed-loop control method. By performing PID adjustment control on the mold temperature controller 8 and the first temperature sensor 9, the inlet oil temperature is raised to the temperature required by the product pump 11.

[0032] The outlet pipeline system provides the outlet pressure and outlet temperature for the test product, and monitors the outlet flow in real time. The outlet pipeline system mainly consists of a second temperature sensor 12, a second pressure sensor 13, a shell and tube heat exchanger 14, a relief valve 15, a pressure regulating valve 16, a flow meter 17, a diverter valve 18 and a second plate heat exchanger 19.

[0033] The outlet pressure closed-loop control consists of a second pressure sensor 13, a relief valve 15, a pressure regulating valve 16 and a diverter valve 18. The hydraulic principle is that the product pump 11 is connected in series with the pressure regulating valve 16, and the pressure regulating valve 16 is connected in parallel with the relief valve 15 to prevent excessive pipeline pressure when the pressure regulating valve is abnormal and blocked or closed. Finally, part of the oil is diverted to the inlet pipeline system by connecting it in series with the diverter valve 18. The control principle is to control the opening of the pressure regulating valve 16, and the initial opening is set to K1=1, and the value of K1 is adjusted between 5% and 95% to control the outlet pressure, and closed-loop control is performed with the second pressure sensor 11, so as to control the outlet pressure of the product pump 11. The second relief valve 15 is connected in parallel with the pressure regulating valve 16 to ensure that the outlet pipeline system will not be over-pressurized.

[0034] The outlet temperature closed-loop control is composed of the second temperature sensor 12, the shell and tube heat exchanger 14, the diverter valve 18 and the second plate heat exchanger 19. The control principle is that the high-temperature and high-pressure oil after the product pump 11 first passes through the shell and tube heat exchanger 14 to achieve preliminary cooling, and then passes through the second plate heat exchanger 19 for secondary cooling, thereby achieving multi-stage cooling. The outlet oil temperature is maintained at the outlet temperature required by the product pump 11 by performing PID adjustment control on the shell and tube heat exchanger 14 and the second temperature sensor 13.

[0035] The system can be divided into two oil circulation modes: large circulation and small circulation, i.e., oil tank circulation and pipeline circulation. The main difference between the two circulation modes is whether the oil passes through the oil tank during the circulation process. The oil ratio of the large circulation and small circulation is mainly adjusted by controlling the opening X% and Y% of the diverter valve 18. The opening X% is set as the opening of the small circulation oil circuit, and the opening Y% is set as the opening of the large circulation oil circuit.

[0036] When conducting ultra-high temperature medium tests, in order to ensure that a large amount of high-temperature oil is not stored in the oil tank, most of the oil adopts a small circulation mode, that is, the opening Y% of the diverter valve 18 should be much smaller than X%, for example, the opening X% is set to 90% to 95%, and the opening Y% is set to 5% to 10%. In order to ensure that the oil passing through the small circulation will not affect the flow direction of the inlet pipeline, a one-way valve 6 is added between the booster pump 3 and the product pump 11. Since the outlet pipeline of the product pump 11 is a high-pressure oil circuit, in order to reduce the safety risks brought by high-temperature and high-pressure oil, a shell and tube heat exchanger 14 is added between the product pump 11 and the pressure regulating valve 16. In order to achieve the demand for rapid cooling, the heat exchange medium used is liquid nitrogen. After passing through the shell and tube heat exchanger 14, the oil is reduced from an ultra-high temperature state to a high temperature state, which reduces the safety risks and greatly reduces the requirements for subsequent components. Since the oil is still at a high temperature after passing through the shell and tube heat exchanger 14, a second plate heat exchanger 19 is further added between the diverter valve 18 and the oil tank 14 to reduce the oil temperature to a normal temperature.

[0037] The above is only a specific embodiment of the present invention, and the present invention is described in detail. The unexplained part is a conventional technology. However, the protection scope of the present invention is not limited to this. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An ultra-high temperature medium test device for an aircraft engine nozzle oil source pump, characterized in that: include: An oil tank (1), an electric motor (2), a booster pump (3), a throttle valve (5), a first plate heat exchanger (7), a mold temperature controller (8), a first temperature sensor (9), a first pressure sensor (10), a product pump (11), a second temperature sensor (12), a second pressure sensor (13), a shell and tube heat exchanger (14), a pressure regulating valve (16), a diverter valve (18), and a second plate heat exchanger (19); wherein the booster pump (3) is connected in series with the oil tank (1) to supply oil to the product pump (11), and is connected in parallel with the throttle valve (5) to transport the remaining oil back to the oil tank (1); the electric motor (2) and the throttle valve (5) are jointly controlled to perform closed-loop control with the first pressure sensor (10) to transfer the oil in the oil tank (1) to the product pump (11). The fuel oil is increased to a required pressure; the pressurized oil is heat exchanged through a first plate heat exchanger (7); the mold temperature controller (8) and the first temperature sensor (9) are used to perform closed-loop regulation and control on the first plate heat exchanger (7) to increase the inlet oil temperature to the required temperature of the product pump (11); the product pump (11) is connected in series with a shell and tube heat exchanger (14), a pressure regulating valve (16), a diverter valve (18) and a second plate heat exchanger (19) in series; the second pressure sensor (11) and the pressure regulating valve (16) are closed-loop controlled to control the outlet pressure of the product pump (11); the shell and tube heat exchanger (14) and the second temperature sensor (13) are closed-loop controlled to maintain the outlet oil temperature at the outlet temperature required by the product pump (11).

2. The device according to claim 1, characterized in that It also includes a first overflow valve (4) which is connected in series between the booster pump (3) and the throttle valve (5).

3. The device according to claim 1, characterized in that It also includes a one-way valve (6) connected in series between the throttle valve (5) and the first plate heat exchanger (7).

4. The device according to claim 1, characterized in that It also includes a second overflow valve (15) connected in parallel with the pressure regulating valve (16).

5. The device according to claim 1, characterized in that It also includes a flow meter (17) which is connected in series between the pressure regulating valve (16) and the diverter valve (18).

6. A method for testing ultra-high temperature medium of an aircraft engine nozzle oil source pump, characterized in that: Using any device as described in claims 1-5, comprising: controlling the opening of the pressure regulating valve (16), setting the initial opening to be fully open as K1=1, adjusting the value of K1 between 5% and 95% to control the outlet pressure, and performing closed-loop control with the second pressure sensor (11), thereby controlling the outlet pressure of the product pump (11).

7. The method according to claim 6, characterized in that The value of K1 is adjusted to 90% to 95%, which is the oil tank circulation mode. The oil passes through the oil tank (1) during the circulation process.

8. The method according to claim 6, characterized in that Adjust the value of K1 to 5% to 10% to enter the pipeline circulation mode, in which the oil does not pass through the oil tank (1) during the circulation process.

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