Automatic flow calibration device for liquid missile engine injector

Abstract

The automatic flow calibration device of the liquid missile engine fuel injection nozzle comprises a water tank, a test cabin unit, a weighing measurement unit, a pure water preparation unit, a sewage treatment unit, a power and measurement and control unit and an exhaust unit, a coarse filter is arranged in the water tank, a fine filter is connected to the water outlet end of the coarse filter and penetrates through the water tank, the water outlet end of the fine filter is fixedly connected with the test cabin unit, the test cabin unit is connected with the weighing measurement unit, and the water outlet end of the weighing measurement unit is connected with one side of the water tank; the other side of the water tank is fixedly connected with the water inlet end and the water outlet end of a refrigerating machine; the pure water preparation unit is fixedly connected with the water inlet end of the water tank, and the water outlet end of the water tank is connected with the pipeline of the sewage treatment unit. The device realizes full-automatic calibration of the flow of the fuel injection nozzle, has high measurement precision and high detection efficiency, meets the weapon batch production demand of the liquid missile engine, promotes the improvement of the flow calibration process of the missile engine research and process department, and promotes the construction of the subsequent full-automatic production line of the missile engine fuel injection nozzle flow calibration.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of liquid missile engine nozzle flow calibration, in particular to an automatic liquid missile engine nozzle flow calibration device. BACKGROUND

[0002] The traditional liquid missile engine uses aviation kerosene as medium, and the kerosene is burned in the combustion chamber after passing through the nozzle, forming engine thrust. The flow of the missile engine nozzle determines the speed and range of the missile, so the flow of the engine nozzle needs to be calibrated before the development and batch production of the missile. For the calibration of the flow of the hundreds of nozzles of the missile engine, the conventional method is to manually receive the water of the nozzles one by one with a measuring cup, and the flow of the nozzles is converted according to the volume of the received water. The manual measurement method has large system error and low detection efficiency, and it takes more than a week to complete the detection of one product. However, the speed of the nozzle flow calibration directly affects the development and production speed of the missile engine, and the conventional method cannot meet the requirements of the batch production of the missile weapon. SUMMARY

[0003] The present application provides an automatic liquid missile engine nozzle flow calibration device to overcome the shortcomings of the prior art.

[0004] The automatic liquid missile engine nozzle flow calibration device of the present application comprises a water tank, a test cabin unit, a weighing measurement unit, a pure water preparation unit, a sewage treatment unit, a power and measurement control unit and an exhaust unit. The water tank is provided with a coarse filter, the water outlet end of the coarse filter penetrates through the water tank and is connected with a fine filter through a pipeline, the water outlet end of the fine filter is fixedly connected with the test cabin unit through a pipeline, the test cabin unit is connected with the weighing measurement unit through a hose, and the water outlet end of the weighing measurement unit is connected with the pipeline on one side of the water tank. The other side of the water tank is fixedly connected with the water inlet end and the water outlet end of a refrigeration machine through a pipeline. The pure water preparation unit is fixedly connected with the water inlet end of the water tank, and the water outlet end of the water tank is connected with the pipeline of the sewage treatment unit.

[0005] As a further improvement of the application, the test cabin unit comprises a rack, a rotating device and a lifting device, the rotating device is fixed on the rack, and the lifting device is fixed directly below the rotating device; the rotating device is composed of a servo motor, a speed reducer, a rotating shaft and a rotating body fixing plate, the rotating body fixing plate is fixed on the rack, the lower end of the rotating shaft penetrates through the rotating body fixing plate, a flange provided on the circumference of the rotating shaft is seated on the boss at the center of the rotating body fixing plate, a deep groove ball bearing is arranged in the boss, a sleeve is sleeved on the rotating shaft, the lower opening of the sleeve is clamped on the outer edge of the boss, and the sleeve is fixed on the rotating body fixing plate through bolts, a thrust bearing is arranged in the upper opening of the sleeve, an upper bearing pressing ring is arranged on the thrust bearing, an upper bearing cover plate presses the upper bearing pressing ring and is fixed with the upper end of the sleeve, a coupling is fixed on the upper end of the rotating shaft, the upper end of the coupling is fixedly connected with the output end of the speed reducer, and the upper end of the speed reducer is fixedly connected with the output end of the servo motor; the lower end of the rotating shaft is fixedly connected with a product connecting section through an adapter.

[0006] As a further improvement of the application, the lifting device is composed of a base, a support, a cylinder I, a cylinder connecting device and a water receiving tool, the support is fixed on the base, the upper end of the cylinder I penetrates through the upper end of the support and is fixed with the cylinder connecting device, a two-dimensional moving platform is fixed on the cylinder connecting device, and the water receiving tool is arranged on the two-dimensional moving platform; one end of the support is provided with a vertically upward sliding rail, a sliding block is slidably connected on the sliding rail, and the other end of the sliding block is fixedly connected with the cylinder connecting device.

[0007] As a further improvement of the application, the two-dimensional moving platform comprises a U-shaped support table I, a front-rear U-shaped moving table and a left-right moving table, the bottom of the U-shaped support table I is fixedly connected with the upper end of the cylinder connecting device, and a threaded rod I is rotatably connected between the two side walls of the U-shaped support table I, one end of the threaded rod I penetrates through one side wall of the U-shaped support table I and is provided with a screw cap I at the end, and guide light rods I are fixed on the two side walls of the U-shaped support table I at the two sides of the threaded rod I, the threaded rod I and the guide light rods I respectively penetrate through the base of the front-rear U-shaped moving table and are movably connected therewith; a threaded rod II is rotatably connected between the two side walls of the front-rear U-shaped moving table, one end of the threaded rod II penetrates through one side wall of the front-rear U-shaped moving table and is provided with a screw cap II at the end, and guide light rods II are fixed on the two side walls of the front-rear U-shaped moving table at the two sides of the threaded rod II, the threaded rod II and the guide light rods II respectively penetrate through the bottom of the left-right moving table and are movably connected therewith; the water receiving tool is fixed on the left-right moving table.

[0008] As a further improvement of the application, the water receiving tool is a hollow limiting groove with a cross-section in the shape of a cross, a plurality of liquid outlet holes are arranged on the side wall of the hollow limiting groove, and the hole positions are matched with the oil injection holes on the product.

[0009] As a further improvement of the application, the test cabin unit is provided with a proximity switch, which is used for position feedback of the rotating device, so as to accurately position the water receiving device and the product.

[0010] As a further improvement of the application, the weighing measuring unit is composed of a water receiving cup, a weighing sensor, a water receiving connecting plate, a cylinder II and a water returning tank, the weighing sensor is fixed on a support of the water returning tank, the water receiving cup is fixed on the weighing sensor, a drain electromagnetic valve is arranged on a water outlet end of the water receiving cup, the cylinder II is fixed on the support of the water returning tank, and the other end of the cylinder II is fixedly connected with the water receiving connecting plate.

[0011] As a further improvement of the application, a manual ball valve I is arranged on the connecting pipeline on both sides of the water tank and the refrigerating machine; a pneumatic ball valve I, a booster pump and an accumulator are sequentially arranged on the connecting pipeline of the coarse filter and the fine filter; a pneumatic ball valve II, a flow meter and a pressure sensor are sequentially arranged on the connecting pipeline of the fine filter and the test cabin unit; a branch pipeline is arranged on the connecting pipeline of the fine filter and the pneumatic ball valve II, the other end of the branch pipeline is fixedly connected with one side of the water tank and is provided with a pneumatic regulating valve thereon; a manual ball valve II and a water returning pump are arranged on the connecting pipeline of the water returning tank and the water tank.

[0012] As a further improvement of the application, the sleeve outer wall is provided with a water inlet.

[0013] As a further improvement of the application, the product connecting section is provided with a product water inlet valve.

[0014] The liquid missile engine fuel injection nozzle automatic flow calibration device has reasonable structure design, realizes full-automatic calibration of the fuel injection nozzle flow, has high measurement precision and high detection efficiency, meets weapon batch production requirements of the liquid missile engine, promotes improvement of the flow calibration process of the missile engine research and process department, and promotes construction of a subsequent missile engine fuel injection nozzle flow calibration full-automatic production line. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a test cabin system schematic diagram of the application;

[0016] Figure 2 It is a rotating device structure schematic diagram of the application;

[0017] Figure 3 It is a lifting device structure schematic diagram of the application;

[0018] Figure 4 It is a side view of the lifting device of the application. DETAILED DESCRIPTION

[0019] The application discloses a liquid missile engine nozzle automatic flow calibration device, which comprises a water tank 1, a test cabin unit 2, a weighing measurement unit 3, a pure water preparation unit 4, a sewage treatment unit 5, a power and measurement and control unit 6 and an exhaust unit 7, a coarse filter 8 is arranged in the water tank 1, a water outlet end of the coarse filter 8 penetrates through the water tank 1 and is connected with a fine filter 9 through a pipeline, a pneumatic ball valve I 40, a booster pump 41 and an accumulator 42 are sequentially arranged on the connecting pipeline of the coarse filter 8 and the fine filter 9, the coarse filter 8 is used for ensuring the cleanliness of water quality before the pump, and the general filtering precision is 80 um; the water outlet end of the fine filter 9 is fixedly connected with a water inlet 49 of the test cabin unit 2 through a pipeline, and a pneumatic ball valve II 43, a flowmeter 44 and a pressure sensor 45 are sequentially arranged on the connecting pipeline, a branch pipeline is arranged on the connecting pipeline of the fine filter 9 and the pneumatic ball valve II 43, one end of the branch pipeline is fixedly connected with one side of the water tank 1, and a pneumatic regulating valve 46 is arranged on the branch pipeline, the fine filter 9 is used for ensuring the cleanliness of outlet water, and the general filtering precision is 5 um.

[0020] The test cabin unit 2 is connected with the weighing measurement unit 3 through a hose, a water outlet end of the weighing measurement unit 3 is connected with a pipeline of one side of the water tank 1, the other side of the water tank 1 is fixedly connected with a water inlet end and a water outlet end of a refrigerating machine 10 through pipelines, and manual ball valves I 39 are arranged on the connecting pipelines of the two sides; the test cabin unit 2 is also connected with the exhaust unit 7, and the exhaust unit 7 mainly comprises an axial flow fan and an exhaust pipeline; during the test, water mist in the test cabin unit 2 can be forcibly exhausted to the outdoor.

[0021] The test cabin unit 2 comprises a rack, a rotating device 11 and a lifting device 12, the rotating device 11 is fixed on the rack, and the lifting device 12 is fixed below the rotating device 11, a proximity switch 60 is arranged in the test cabin unit 2, and the proximity switch 60 is used for position feedback of the rotating device 11, so that the position relationship between a water receiving tool 29 and a product 61 is accurately positioned.

[0022] The rotating device 11 is composed of a servo motor 13, a speed reducer 14, a rotating shaft 15 and a rotating body fixing plate 16. The rotating body fixing plate 16 is fixed on a rack. The lower end of the rotating shaft 15 penetrates the rotating body fixing plate 16 and is seated on a boss at the center of the rotating body fixing plate 16 with a flange provided on the circumference of the rotating shaft 15. A deep groove ball bearing 18 is arranged in the boss. A sleeve 19 is sleeved on the rotating shaft 15 and is clamped on the outer edge of the boss at the lower opening. The sleeve 19 is fixed on the rotating body fixing plate 16 by bolts. A water inlet 49 is arranged on the outer wall of the lower part of the sleeve 19. The water inlet 49 is welded on the outer wall of the sleeve 19 by welding. A thrust bearing 20 is arranged in the upper opening of the sleeve 19. An upper bearing pressing ring 21 is arranged on the thrust bearing 20. An upper bearing cover plate 22 presses the upper bearing pressing ring 21 and is fixed on the upper end of the sleeve 19. A groove is arranged on the inner wall of the lower part of the sleeve 19. An O-shaped sealing ring 51 is arranged in the groove. The O-shaped sealing ring 51 is used to ensure the dynamic sealing of the rotating shaft 15 and the sleeve 19. The upper end of the rotating shaft 15 is fixed with a coupling 17. The upper end of the coupling 17 is fixedly connected with the output end of the speed reducer 14. The upper end of the speed reducer 14 is fixedly connected with the output end of the servo motor 13. The lower end of the rotating shaft 15 is fixedly connected with a product connecting section 24 through an adapter 23. The product connecting section 24 is provided with a product water inlet valve 50.

[0023] The rotating shaft 15 is a hollow shaft. A liquid inlet 62 is arranged on the upper part of the rotating shaft 15. The liquid outlet at the lower end of the rotating shaft 15 is communicated with the adapter 23. The liquid outlet of the adapter 23 is communicated with the product connecting section 24. The product connecting section 24 is a pipeline. The liquid outlet of the product connecting section 24 is fixedly connected with the liquid inlet of the product 61. The water at the water outlet of the fine filter 9 enters the sleeve 19 from the water inlet 49, enters the rotating shaft 15 through the liquid inlet 62 on the rotating shaft 15, and then flows through the rotating shaft 15, the adapter 23 and the product connecting section 24 to the product 61.

[0024] The lifting device 12 is composed of a base 25, a support 26, a cylinder I 27, a cylinder connecting device 28 and a water receiving tool 29. The support 26 is fixed on the base 25. The upper end of the cylinder I 27 penetrates the upper end of the support 26 and is fixed with the cylinder connecting device 28. The cylinder connecting device 28 is fixed with a two-dimensional moving platform 30. The two-dimensional moving platform 30 is provided with the water receiving tool 29. The water receiving tool 29 is a hollow limiting groove with a cross-shaped cross section. A plurality of liquid outlets 63 are arranged on the side wall of the water receiving tool 29. The positions of the liquid outlets 63 are matched with the oil injection holes on the product 61.

[0025] The two-dimensional moving platform 30 comprises a U-shaped support table 51, a front and rear U-shaped moving table 52 and a left and right moving table 53. The bottom of the U-shaped support table 51 is fixedly connected with the upper end of the air cylinder connecting device 28. Threaded rods I 54 are rotatably connected between the two side walls of the U-shaped support table 51. One end of each threaded rod I 54 penetrates through one side wall of the U-shaped support table 51 and is provided with a screw cap I 58 at the end. The two sides of each threaded rod I 54 are fixedly connected with the two side walls of the U-shaped support table 51 through guide light rods I 55. The threaded rods I 54 and the guide light rods I 55 penetrate through the base of the front and rear U-shaped moving table 52 and are movably connected with the base. Threaded rods II 56 are rotatably connected between the two side walls of the front and rear U-shaped moving table 52. One end of each threaded rod II 56 penetrates through one side wall of the front and rear U-shaped moving table 52 and is provided with a screw cap II 59 at the end. The two sides of each threaded rod II 56 are fixedly connected with the two side walls of the front and rear U-shaped moving table 52 through guide light rods II 57. The threaded rods II 56 and the guide light rods II 57 penetrate through the bottom of the left and right moving table 53 and are movably connected with the bottom. A water receiving device 29 is fixedly connected to the left and right moving table 53.

[0026] One end of the support 26 is provided with a vertical upward sliding rail 31. A sliding block 32 is slidably connected to the sliding rail 31. The other end of the sliding block 32 is fixedly connected with the air cylinder connecting device 28. The linear degree and stability of the air cylinder I 27 during lifting can be ensured by the cooperation of the sliding rail 31 and the sliding block 32.

[0027] The weighing measuring unit 3 is composed of a water receiving beaker 33, a weighing sensor 34, a water receiving connecting plate 35, an air cylinder II 36 and a backwater tank 37. The weighing sensor 34 is fixedly connected to the support of the backwater tank 37. The water receiving beaker 33 is fixedly connected to the weighing sensor 34. A water outlet of the water receiving beaker 33 is provided with a drain electromagnetic valve 38. The weighing sensor 34 can display the weight of the water receiving beaker 33 and the drain electromagnetic valve 38 in real time. During flow calibration, the weight of the received water can be calculated according to the time weighing method and converted into flow. The air cylinder II 36 is fixedly connected to the support of the backwater tank 37. The other end of the air cylinder II 36 is fixedly connected with the water receiving connecting plate 35. In a non-working state, water passing through the water receiving connecting plate 35 can flow into the backwater tank 37. In a working state, the air cylinder II 36 can drive the water receiving connecting plate 35 to move, so that water passing through the water receiving connecting plate 35 flows into the water receiving beaker 33. The water outlet of the backwater tank 37 is connected with one side pipeline of the water tank 1 and is provided with a manual ball valve II 47 and a backwater pump 48 on the connecting pipeline. The backwater pump 48 can pump water in the backwater tank 47 into the water tank 1.

[0028] The pure water preparation unit 4 is fixedly connected with the water inlet end of the water tank 1, mainly comprises a raw water pump, a security filter, a booster pump, an RO membrane, a manual ball valve, an electric conductivity instrument, a power distribution electric control box and a pressure gauge, is used for treating tap water to prepare pure water, the desalination rate is greater than or equal to 95%, and the electric conductivity is less than or equal to 10 μs / cm, and then the prepared pure water is stored in the water tank 1 as test water.

[0029] The sewage treatment unit 5 is connected with the water outlet end of the water tank 1, mainly comprises a raw water pump, a security filter, a quartz sand filter tank, an activated carbon filter tank, a booster pump, an RO membrane, a manual ball valve, a power distribution electric control box and a pressure gauge, is used for treating test wastewater in the water tank 1, and discharging the treated sewage to a sewer.

[0030] The power and measurement and control unit 6 mainly comprises a PLC, an acquisition board card, an industrial computer, a display, a weighing module, a circuit breaker and the like electrical elements, is used for power distribution of each device of the system, controls test data such as pressure, temperature and flow in the test process, converts the water weight measured by the weighing measurement device into flow, stores test data and generates a data report, and is further provided with an emergency pump stop function, is used for one-key emergency stop when the pipeline pressure is too high in the test, and can also control the action of each valve, and forms a PID closed loop control.

[0031] Working principle: firstly, the liquid inlet of the missile engine is connected with the liquid outlet of the product connection section 24, then the rotating device 11 drives the missile engine to rotate until reaching the inductive position of the proximity switch, the rotating device stops rotating, the missile engine completes zero setting of the initial position, then the lifting device 12 makes the water receiving tool 29 opposite the oil nozzle in one quadrant of the missile engine, the water receiving tool is used for receiving water sprayed by the oil nozzle of the missile engine, and the water is introduced to the weighing measurement unit 3 through the hose 64 to measure the flow, when the flow calibration of the oil nozzle in one quadrant of the missile engine is completed, the lifting device 12 drives the water receiving tool 29 to descend, the rotating device 11 drives the missile engine (i.e. the product 61) to rotate at a specific angle (the rotating body fixed plate 16, the sleeve 19 and the upper bearing cover plate 22 do not rotate) through the servo motor 13, the speed reducer 14, the rotating shaft 15, the adapter 23, the product connection section 24, and then the lifting device 12 drives the water receiving tool 29 to ascend, so that the water receiving tool is opposite the oil nozzle of the missile engine, and the flow calibration of the oil nozzle in the next quadrant is started, and the flow calibration of the oil nozzle of the missile engine is completed in this way.

Claims

1. An automated flow calibration device for liquid missile engine injectors, characterized in that... The system includes a water tank (1), a test chamber unit (2), a weighing and measuring unit (3), a pure water preparation unit (4), a wastewater treatment unit (5), a power and control unit (6), and an exhaust unit (7). The water tank (1) is equipped with a coarse filter (8). The outlet of the coarse filter (8) passes through the water tank (1) and is connected to a fine filter (9) via a pipe. The outlet of the fine filter (9) is fixedly connected to the test chamber unit (2) via a pipe. The test chamber unit (2) is connected to the weighing and measuring unit (3) via a flexible hose. The outlet of the weighing and measuring unit (3)... The water end is connected to one side of the water tank (1) via a pipe; the other side of the water tank (1) is fixedly connected to the inlet and outlet of the chiller (10) via pipes; the pure water preparation unit (4) is fixedly connected to the inlet of the water tank (1), and the outlet of the water tank (1) is connected to the sewage treatment unit (5) via a pipe; the test chamber unit (2) includes a platform, a rotating device (11) and a lifting device (12), the rotating device (11) is fixed on the platform, and the lifting device (12) is fixed directly below the rotating device (11); the rotating device ( 11) is composed of a servo motor (13), a reducer (14), a rotating shaft (15), and a rotating body fixing plate (16). The rotating body fixing plate (16) is fixed on the frame. The lower end of the rotating shaft (15) passes through the rotating body fixing plate (16), and the flange provided on its circumference sits on the boss at the center position of the rotating body fixing plate (16), and a deep groove ball bearing (18) is provided therein. The sleeve (19) is sleeved on the rotating shaft (15), and its lower opening is stuck on the outer edge of the boss and fixed to the rotating body fixing plate (16) by bolts. A thrust bearing (20) is provided inside the upper opening. An upper bearing pressure ring (21) is provided on the thrust bearing (20). The upper bearing cover plate (22) presses the upper bearing pressure ring (21) and is fixed to the upper end of the sleeve (19). A coupling (17) is fixed to the upper end of the rotating shaft (15). The upper end of the coupling (17) is fixedly connected to the output end of the reducer (14). The upper end of the reducer (14) is fixedly connected to the output end of the servo motor (13). A product connection section (24) is fixedly connected to the lower end of the rotating shaft (15) through an adapter (23).

2. The automated flow calibration device for liquid missile engine injectors according to claim 1, characterized in that... The lifting device (12) consists of a base (25), a bracket (26), a cylinder I (27), a cylinder connecting device (28), and a water receiving fixture (29). The bracket (26) is fixed on the base (25). The upper end of the cylinder I (27) passes through the upper end of the bracket (26) and is fixed to the cylinder connecting device (28). A two-dimensional moving platform (30) is fixed on the cylinder connecting device (28), and a water receiving fixture (29) is provided on the two-dimensional moving platform (30). One end of the bracket (26) is provided with a vertically upward slide rail (31), and a slider (32) is slidably connected on the slide rail (31). The other end of the slider (32) is fixedly connected to the cylinder connecting device (28).

3. The automated flow calibration device for liquid missile engine injectors according to claim 2, characterized in that... The two-dimensional moving platform (30) includes a U-shaped support platform I (51), a front and rear U-shaped moving platform (52), and a left and right moving platform (53). The bottom of the U-shaped support platform I (51) is fixedly connected to the upper end of the cylinder connecting device (28). A threaded rod I (54) is rotatably connected between the two side walls of the U-shaped support platform I (51). One end of the threaded rod I (54) passes through one side wall of the U-shaped support platform I (51) and has a screw cap I (58) at its end. Guide rods I (55) are respectively provided on both sides of the threaded rod I (54) and are fixed to the two side walls of the U-shaped support platform I (51). The threaded rod I (54) and the guide rod I (55) are fixed to the two side walls of the U-shaped support platform I (51). 5) Pass through the base of the front and rear U-shaped moving platforms (52) respectively and move in coordination with them; a threaded rod II (56) is rotatably connected between the two side walls of the front and rear U-shaped moving platforms (52). One end of the threaded rod II (56) passes through one side wall of the front and rear U-shaped moving platforms (52) and a screw cap II (59) is provided at its end. Guide rods II (57) are provided on both sides of the threaded rod II (56) and fixed to the two side walls of the front and rear U-shaped moving platforms (52). The threaded rod II (56) and the guide rod II (57) pass through the bottom of the left and right moving platforms (53) respectively and move in coordination with them; a water receiving fixture (29) is fixed on the left and right moving platforms (53).

4. The automated flow calibration device for liquid missile engine injectors according to claim 2, characterized in that... The water receiving fixture (29) is a cavity limiting groove with a cross-shaped cross section. Multiple liquid outlet holes are provided on its side wall, and the hole positions match the oil spray holes on the product (61).

5. The automated flow calibration device for liquid missile engine injectors according to claim 2, characterized in that... The test chamber unit (2) is equipped with a proximity switch (60), which is used for position feedback of the rotating device (11) to accurately position the water receiving tool (29) and the product (61).

6. The automated flow calibration device for liquid missile engine injectors according to claim 1, characterized in that... The weighing measurement unit (3) consists of a water beaker (33), a weighing sensor (34), a water receiving connecting plate (35), a cylinder II (36), and a return water tank (37). The weighing sensor (34) is fixed on the bracket of the return water tank (37), the water beaker (33) is fixed on the weighing sensor (34), and a drain solenoid valve (38) is provided on the water outlet end of the water beaker (33). The cylinder II (36) is fixed on the bracket of the return water tank (37), and the other end of the cylinder II (36) is fixedly connected to the water receiving connecting plate (35).

7. The automated flow calibration device for liquid missile engine injectors according to claim 6, characterized in that... Manual ball valve I (39) is provided on the connecting pipes between the water tank (1) and the refrigerator (10) on both sides; pneumatic ball valve I (40), booster pump (41) and accumulator (42) are provided in sequence on the connecting pipes between the coarse filter (8) and the fine filter (9); pneumatic ball valve II (43), flow meter (44) and pressure sensor (45) are provided in sequence on the connecting pipes between the fine filter (9) and the test chamber unit (2); a branch pipe is provided on the connecting pipe between the fine filter (9) and the pneumatic ball valve II (43), and the other end of the branch pipe is fixedly connected to one side of the water tank (1) and a pneumatic regulating valve (46) is provided on it; manual ball valve II (47) and return water pump (48) are provided on the connecting pipe between the return water tank (37) and the water tank (1).

8. The automated flow calibration device for liquid missile engine injectors according to claim 1, characterized in that... The sleeve (19) has a water inlet (49) on its outer wall.

9. The automated flow calibration device for liquid missile engine injectors according to claim 1, characterized in that... The product connection section (24) is equipped with a product water inlet valve (50).

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