CN211234971U - Supersonic engine test bench thrust measurement exhaust apparatus - Google Patents

Abstract

A supersonic engine test bed thrust measurement exhaust device comprises an engine thrust measurement rack, an exhaust system, a tail gas treatment system and a high-altitude simulation cabin; the high-altitude simulation cabin is of a sealed shell structure, the engine thrust measurement rack is fixedly arranged in the high-altitude simulation cabin, and the tested engine is arranged on the engine thrust measurement rack; one end of the exhaust system penetrates through the surface of the shell of the high-altitude simulation cabin and is fixedly installed in the high-altitude simulation cabin, and the other end of the exhaust system is fixedly communicated with the tail gas treatment system. The utility model discloses an exhaust apparatus is measured to supersonic engine test bench thrust, its engine thrust measurement rack has realized the measurement of engine thrust, simple structure, simultaneously, has realized the processing of engine test bench tail gas, makes and accords with national pollutant emission standard by alkaline spray column gas outlet combustion gas.

Description

Supersonic engine test bench thrust measurement exhaust apparatus

Technical Field

The utility model belongs to the technical field of the engine test technique and specifically relates to a supersonic engine test bench thrust measurement exhaust apparatus.

Background

The engine test and test technology is an important component of the solid propulsion technology, and the thrust measurement is an important parameter to be measured in the engine test and test. To study engine thrust, numerous trial and error tests are required, which are not possible if all are put into flight tests. The main reasons are high flight test cost, long period, small information yield, risk and large manpower consumption. The engine ground test is to perform static test on the system according to specific conditions and environmental requirements on the ground to obtain various performance index information describing the system so as to solve the key problem in the engine thrust test process.

In addition, for the engine test beds of the aerospace engines such as the turbofan engine and the solid-impact engine, the main components of the exhaust gas are carbon dioxide and hydrogen sulfide and contain certain particulate matters, the particulate matters mainly comprise diboron trioxide and magnesium oxide, if the exhaust gas exhausted by the test beds is directly exhausted into the atmosphere, the atmosphere is greatly polluted, acid rain is generated, meanwhile, pollutants such as PM10 and PM2.5 can be formed by the exhausted particulate matters to pollute the atmosphere, the method is not environment-friendly, and in the prior art, no mature and effective method exists for treating the exhaust gas of the engine test beds of the aerospace engines such as the turbofan engine and the solid-impact engine.

Disclosure of Invention

The technical solution problem of the utility model is that: the supersonic engine test bed thrust measurement exhaust device overcomes the defects of the prior art.

The technical solution of the utility model is that: a supersonic engine test bed thrust measurement exhaust device comprises an engine thrust measurement rack, an exhaust system, a tail gas treatment system and a high-altitude simulation cabin; the high-altitude simulation cabin is of a sealed shell structure, the engine thrust measurement rack is fixedly arranged in the high-altitude simulation cabin, and the tested engine is arranged on the engine thrust measurement rack; one end of the exhaust system penetrates through the surface of the shell of the high-altitude simulation cabin and is fixedly installed in the high-altitude simulation cabin, and the other end of the exhaust system is fixedly communicated with the tail gas treatment system.

Compared with the prior art, the utility model the advantage lie in:

1. the utility model discloses an exhaust apparatus is measured to supersonic engine test bench thrust, its engine thrust measurement rack has realized the measurement of engine thrust, simple structure.

2. The utility model discloses an exhaust apparatus is measured to supersonic engine test bench thrust, its engine thrust measurement rack, ingenious will move the frame and hang on the shelf location through the spring leaf to the thrust of assisting force transducer measurement engine, simple and easy.

3. The utility model discloses an exhaust apparatus is measured to supersonic engine test bench thrust, in its engine thrust measurement rack, set up the measurement section bracket to the measurement section that is used for guaranteeing to be used for measuring the air inlet parameter of the engine under test is coaxial with the engine, has both guaranteed the engine precision of the simulation of admitting air, has improved the engine precision of parameter measurement of admitting air again.

4. The utility model discloses an exhaust apparatus is measured to supersonic engine test bench thrust, in its engine thrust measurement rack, it moves a set of global rigidity great, in order to guarantee test frame dynamic behavior, reasonable distribution atress component in the design adopts intensity principle such as structure, removes optimization design such as not atress part of material, alleviates and moves a quality.

5. The utility model discloses an exhaust apparatus is measured to supersonic engine test bench thrust, in its engine thrust measurement rack, its decides the frame and sets up horizontal base, improves the load capacity of whole frame.

6. The utility model discloses an exhaust apparatus is measured to supersonic engine test bench thrust, in its engine thrust measurement rack, set up locking state, when making the engine install the engine before not test condition or experiment, move the frame and keep the fixed state with the stationary frame, the life of engine thrust measurement rack has been prolonged, avoid exerting irreversible external force and causing the damage even to the spring leaf when moving the frame and installing engine under the self-condition (not using locking state) and relevant testpieces simultaneously, the precision of engine thrust measurement rack has been guaranteed.

7. The utility model discloses an exhaust apparatus is measured to supersonic engine test bench thrust, in its engine thrust measurement rack, adopt planer-type engine mounting bracket, hang the engine and set up, improved the measurement accuracy of engine thrust to it is adjustable with the rear joint position to set up the front connector, improved the application scope of engine mounting bracket by a wide margin, solved the problem that an engine set up an engine mounting bracket in the past.

8. The utility model discloses an exhaust apparatus is measured to supersonic engine test bench thrust, in its engine thrust measurement rack, adopt standard force sensor to carry out the error of working force sensor to the working force sensor and confirm, static calibration, known "simulation thrust" that produces a set of high accuracy from this carries out the degree of definite to force measuring system, because it has reappeared the deformation and the atress condition of test condition, eliminated because the deformation that produces during the experiment, the installation, the temperature, the most system error that causes such as restraint, thereby the uncertainty of thrust measurement has been reduced.

9. The utility model discloses an exhaust apparatus is measured to supersonic engine test bench thrust, in its engine thrust measurement rack, draw the characteristic curve graph of standard force sensor and working force sensor through demarcating, pass through the true value of the accurate definite force of characteristic curve graph with the power value of working force sensor output, avoided experimental calibration to the working force sensor at every turn, it is with low costs, efficient.

10. The utility model discloses an among the supersonic engine test bench thrust measurement exhaust apparatus, its tail gas processing system, spray the platform through setting up confined circulating water pond and 2 sets of alkalis, the processing of engine test bench tail gas has been realized, make and accord with national pollutant emission standard by the gas of basicity spray tower gas outlet, it sprays the platform to set up 2 sets of parallelly connected alkalis, make engine test bench tail gas fall into 2 ways and carry out the alkalis and spray, the velocity of flow of engine test bench tail gas through the alkalis spray tower has been reduced, it is more abundant to make the alkalis spray the process, the work load of every alkalis spray tower has been reduced simultaneously, further abundant the alkalis of having carried out spray.

11. The utility model discloses an exhaust apparatus is measured to supersonic engine test bench thrust, its engine test bench tail gas processing system, the creative confined circulation pond of arranging frequency conversion diffuser in, the gaseous volume that holds in the circulation pond is greater than frequency conversion diffuser makes engine test bench exhaust tail gas carry out buffering once in confined circulation pond, has reduced the velocity of flow of engine test bench tail gas for when follow-up this gas gets into alkaline spray column, it is abundant to carry out alkaline spray.

12. The utility model discloses an exhaust apparatus is measured to supersonic engine test bench thrust, its engine test bench tail gas processing system sets up the frequency conversion diffuser water conservancy diversion awl of cone type in frequency conversion diffuser, will get into the gaseous water conservancy diversion of frequency conversion diffuser barrel for the even discharge from a plurality of frequency conversion diffuser ventholes of gaseous following of getting into the frequency conversion diffuser barrel, can be even be full of the gaseous volume that holds in the circulating water pond, be favorable to gaseous buffering and subsequent basicity to spray.

13. The utility model discloses a supersonic engine test bench thrust measurement exhaust apparatus, its engine test bench tail gas processing system, creative set up 2 layers of spraying system in every basicity spray column, make and spray more thoroughly.

14. The utility model discloses an exhaust apparatus is measured to supersonic engine test bench thrust, in its engine test bench tail gas processing system, it has ceramic material's packing layer to set up to pack in every layer of spraying system, has improved the throughput of alkaline spray column by a wide margin.

15. The utility model discloses an exhaust apparatus is measured to supersonic engine test bench thrust, among its engine test bench tail gas processing system, through setting up circulating water pond, waste water treatment equipment and closed cooling tower have realized the reuse of alkaline circulating water, and testing cost reduces by a wide margin.

Drawings

Fig. 1 is the structure schematic diagram of the supersonic engine test bed thrust measurement exhaust device of the utility model.

Fig. 2 is the utility model discloses an among the supersonic engine test bench thrust measurement exhaust apparatus, the structure elevation of engine thrust measurement rack.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is an enlarged view of a portion B in fig. 2.

Fig. 5 is the utility model discloses an among the supersonic engine test bench thrust measurement exhaust apparatus, engine thrust measures rack construction top view.

Fig. 6 is an enlarged view of the portion C of fig. 5.

Fig. 7 is the utility model discloses an among the supersonic engine test bench thrust measurement exhaust apparatus, the structural sketch of the measurement section bracket of engine thrust measurement rack.

Fig. 8 is an enlarged view of a portion D in fig. 7.

Fig. 9 is an enlarged view of a portion E of fig. 7.

Fig. 10 is a front view of the engine mounting rack of the engine thrust measuring rack in the thrust measuring exhaust device of the supersonic engine test stand of the present invention.

Fig. 11 is a side view of the structure of the engine mounting bracket of the engine thrust measuring rack in the supersonic engine test stand thrust measuring exhaust device of the present invention.

Fig. 12 is the structure diagram of the engine mounting top frame of the engine thrust measuring rack in the thrust measuring exhaust device of the supersonic engine test stand of the present invention.

Fig. 13 is the utility model discloses an among the supersonic engine test bench thrust measurement exhaust apparatus, the principle sketch map of the force sensor calibration of engine thrust measurement rack.

Fig. 14 is the structure diagram of the tail gas treatment system of the supersonic engine test stand in the thrust measurement exhaust device of the supersonic engine test stand.

Fig. 15 is the utility model discloses an among the supersonic engine test bench thrust measurement exhaust apparatus, can show the structural schematic of engine test bench tail gas treatment system inner structure.

FIG. 16 is the schematic structural diagram of the alkali liquor spray tower of the engine test stand tail gas treatment system in the supersonic engine test stand thrust measurement exhaust device of the present invention.

Fig. 17 is the utility model discloses an among the supersonic engine test bench thrust measurement exhaust apparatus, on an angular direction, engine test bench tail gas treatment system's frequency conversion diffuser's schematic structure.

Fig. 18 is a schematic structural diagram of a frequency diffuser in the engine test stand tail gas treatment system in another angular direction in the supersonic engine test stand thrust measurement exhaust device of the present invention.

Fig. 19 is the utility model discloses an among the supersonic engine test bench thrust measurement exhaust apparatus, the structure sketch map of frequency conversion diffuser water conservancy diversion awl in the frequency conversion diffuser of engine test bench tail gas treatment system.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "abutted" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A supersonic speed engine, especially a thrust measurement exhaust apparatus of aerospace engines such as turbofan engine, solid rush engine, etc., include the engine thrust measures the rack, exhaust system 700, tail gas treatment system 800 and high altitude simulation cabin 900; the high-altitude simulation cabin 900 is a sealed shell structure, the shape of the high-altitude simulation cabin is not limited, and the high-altitude simulation cabin can be a cuboid, an ellipsoid and the like; the engine thrust measuring rack is fixedly arranged in the high-altitude simulation cabin 900, and the tested engine 1 is arranged on the engine thrust measuring rack; one end of the exhaust system 700 penetrates through the surface of the shell of the high-altitude simulation cabin 900 and is fixedly installed inside the high-altitude simulation cabin 900, and the other end of the exhaust system 700 is fixedly communicated with the tail gas treatment system 800.

The engine thrust measuring rack comprises a fixed rack 100, a movable rack 200 and a loading measuring device; the loading measuring device comprises a spring piece, a loading mechanism 330 and a working force sensor 350; the movable frame 200 is suspended on the fixed frame 100 through the spring plate, the loading mechanism 330 is fixedly mounted on the fixed frame 100, and two ends of the working force sensor 350 are respectively connected with the fixed frame 100 and the movable frame 200.

The fixed frame comprises a base 110, a front mounting seat 120, a loading mechanism mounting seat 130, a first fixed frame spring piece mounting seat 140, a fixed frame working force sensor mounting seat 150, a rear mounting seat 160 and a second fixed frame spring piece mounting seat 170; the base 110 is of a cuboid structure, the front mounting seat 120 and the rear mounting seat 160 are respectively and fixedly mounted at the front end and the rear end of the base 110 along the length direction of the base 110, the rear mounting seat 160 comprises a transverse plate and a vertical plate, and the transverse plate and the vertical plate form an L shape; the loading mechanism mounting seat 130 is fixedly mounted on the front mounting seat 120, the first fixed frame spring leaf mounting seat 140 includes a first right fixed frame spring leaf mounting seat 141 and a first left fixed frame spring leaf mounting seat 142, and the first right fixed frame spring leaf mounting seat 141 and the first left fixed frame spring leaf mounting seat 142 are fixedly mounted at the front end of the base 110 and are respectively located on two sides of the front mounting seat 120; the fixed frame working force sensor mounting seat 150 is fixedly mounted on the base 110 and is positioned on a central line along the length direction of the base 110; the second fixed frame spring piece mounting seat 170 includes a second right fixed frame spring piece mounting seat 171 and a second left fixed frame spring piece mounting seat 172, and the second right fixed frame spring piece mounting seat 171 and the second left fixed frame spring piece mounting seat 172 are fixedly mounted at the rear end of the base 110 and respectively located at two sides of the rear mounting seat 160.

The movable frame 200 comprises a movable frame body 210, a first movable frame spring piece mounting seat 220, a movable frame working force sensor mounting seat 230, a second movable frame spring piece mounting seat 240 and a movable frame standard force sensor mounting seat 250, wherein the movable frame body 210 comprises a right movable frame body 211, a left movable frame body 212 and a movable frame connecting plate 260, the right movable frame body 211 and the left movable frame body 212 are identical in structure, both of which are cuboid structures and are parallel to the base 110, the central line of the right movable frame body 211 and the left movable frame body 212 in the length direction is parallel to the central line of the base 110 in the length direction, the right movable frame body 211 and the left movable frame body 212 are symmetrically arranged relative to the central line of the base 110 in the length direction, the number of the movable frame connecting plates 260 is multiple, and the right movable frame body 211 and the left movable frame body 212 are fixedly connected by the plurality of the movable frame connecting plates 260; along the length direction of the movable frame body 210, a movable frame standard force sensor mounting seat 250 is fixedly mounted on the bottom surface of the front end of the movable frame body 210; the first moving frame spring piece mounting seat 220 comprises a first right moving frame spring piece mounting seat and a first left moving frame spring piece mounting seat, and the first right moving frame spring piece mounting seat and the first left moving frame spring piece mounting seat are respectively fixedly mounted on the bottom surfaces of the front ends of the right moving frame body 211 and the left moving frame body 212 and are respectively positioned on two sides of the moving frame standard force sensor mounting seat 250; the movable frame working force sensor mounting base 230 is fixedly mounted at the bottom of one movable frame connecting plate 260 of the movable frame body 210 and is located on a central line along the length direction of the movable frame body 210; the second moving frame spring piece mounting seat 240 comprises a second right moving frame spring piece mounting seat and a second left moving frame spring piece mounting seat, and the second right moving frame spring piece mounting seat and the second left moving frame spring piece mounting seat are fixedly mounted on the bottom surfaces of the rear ends of the right moving frame body 211 and the left moving frame body 212 respectively.

The loading measuring device comprises a first spring plate 310, a second spring plate 320, a loading mechanism 330, a standard force sensor 340 and a working force sensor 350; the first spring piece 310 comprises a first right spring piece 311 and a first left spring piece 312, two ends of the first right spring piece 311 are respectively and fixedly connected with a first right fixed frame spring piece mounting seat 141 and a first right movable frame spring piece mounting seat, and two ends of the first left spring piece 312 are respectively and fixedly connected with a first left fixed frame spring piece mounting seat 142 and a first left movable frame spring piece mounting seat; the second spring piece 320 comprises a second right spring piece 321 and a second left spring piece 322, two ends of the second right spring piece 321 are fixedly connected with the second right fixed frame spring piece mounting seat 171 and the second right movable frame spring piece mounting seat respectively, and two ends of the second left spring piece 322 are fixedly connected with the second left fixed frame spring piece mounting seat 172 and the second left movable frame spring piece mounting seat respectively; the loading mechanism 330 is fixedly mounted on a transverse plate of the front mounting seat 120, the standard force sensor 340 is fixedly mounted on a baffle plate at the front end of the movable frame body 210, and the loading mechanism 330 and the standard force sensor 340 are coaxially arranged and are parallel to the central line of the base 110 along the length direction; two ends of the working force sensor 350 are respectively and fixedly connected with the fixed frame working force sensor mounting seat 150 and the movable frame working force sensor mounting seat 230, and the working force sensor 350, the loading mechanism 330 and the standard force sensor 340 are coaxially arranged; the loading mechanism 330 comprises a servo motor, a motor power supply, a hydraulic loading device and a calibration oil cylinder, wherein the motor power supply is electrically connected with the servo motor, the servo motor is sequentially connected with the hydraulic loading device and the calibration oil cylinder, and a piston of the calibration oil cylinder is connected with a standard force sensor.

The engine thrust measuring rack comprises a measuring section bracket for supporting a measuring section, the measuring section bracket comprises a first measuring section bracket 410 and a second measuring section bracket 420 which are coaxially arranged, and the first measuring section bracket 410 and the second measuring section bracket 420 have the same structure and are both fixedly arranged on the top surface of the movable rack body 210; the measuring section bracket comprises a measuring section bracket 411, a measuring section bracket lower ring 412, a measuring section bracket upper ring 413, a measuring section bracket positioning mechanism 414 and a locking device 415; the bottom surface of the measurement section bracket 411 is fixedly connected with the top surface of the movable frame body 210, the measurement section bracket lower ring 412 and the measurement section bracket upper ring 413 are both of a semicircular structure, and the measurement section bracket lower ring 412 and the measurement section bracket upper ring 413 are connected to form a circle; the measuring section bracket lower ring 412 and the measuring section bracket 411 are integrally formed; the number of the measuring section bracket positioning mechanisms 414 is 3, the structures of the measuring section bracket positioning mechanisms are the same, and the measuring section bracket positioning mechanisms 414 are used for positioning and measuring the measuring sections of the intake parameters of the tested engine 1, the 3 measuring section bracket positioning mechanisms 414 are uniformly distributed along the radial direction of a circle formed by connecting the measuring section bracket lower ring 412 and the measuring section bracket upper ring 413, wherein one measuring section bracket positioning mechanism 414 is arranged at the top of the measuring section bracket upper ring 413, and the rest 2 measuring section bracket positioning mechanisms 414 are arranged on the measuring section bracket lower ring 412; the measuring section bracket positioning mechanism 414 comprises a positioning mechanism nut 4141, a positioning mechanism locking nut 4142 and a positioning mechanism screw 4143, the positioning mechanism screw 4143 passes through the measuring section bracket lower ring 412 or the measuring section bracket upper ring 413, the positioning mechanism locking nut 4142 is sleeved on the positioning mechanism screw 4143, is arranged on the outer side of the measuring section bracket lower ring 412 or the measuring section bracket upper ring 413 and is abutted against the measuring section bracket lower ring 412 or the measuring section bracket upper ring 413 and is used for locking the positioning mechanism screw 4143, and the positioning mechanism nut 4141 is sleeved on the positioning mechanism screw 4143 and is abutted against the positioning mechanism locking nut 4142; the number of the locking devices 415 is 2, and the structures of the locking devices are the same, and the locking devices 415 are used for fixedly connecting the lower ring 412 of the measurement section bracket and the upper ring 413 of the measurement section bracket, 2 locking devices 415 are arranged at the connecting ends of the lower ring 412 of the measurement section bracket and the upper ring 413 of the measurement section bracket, the locking device 415 includes an upper locking plate 4151, a lower locking plate 4152, a locking bolt 4153 and a locking nut 4154, the upper locking plate 4151 is fixedly attached to the front end surface of the upper ring 413 of the measurement section bracket, the lower surface of the upper locking plate 4151 coincides with the lower surface of the upper ring 413 of the measurement section bracket, the lower locking plate 4152 is fixedly attached to the front end surface of the measuring section bracket lower ring 412, the upper surface of the lower lock plate 4152 coincides with the upper surface of the measuring section bracket lower ring 412, the locking bolt 4153 passes through the lower and upper locking plates 4152 and 4151 in sequence, the lock nut 4154 is engaged with the lock bolt 4153 and abuts against the upper lock plate 4151.

The engine thrust measuring rack comprises a locking device, the locking device comprises a fastening screw rod 510, a fastening baffle 520 and a fastening nut 530, the fastening screw rod 510 sequentially penetrates through a rear end baffle of the movable rack body 210, the fastening baffle 520, a vertical plate and a fastening nut 530 of the rear mounting seat 160, the fastening nut 530 is matched with the fastening screw rod 510, and the fastening baffle 520 and the fastening nut 530 are both abutted to the vertical plate of the rear mounting seat 160.

The engine thrust measuring rack comprises an engine mounting rack 600, wherein the engine mounting rack 600 comprises an engine mounting top rack 610, a left upright column 620 and a right upright column 630 which are identical in structure, a front joint 640, a rear joint 650 and a lifting lug 660; the bottom surfaces of the left upright post 620 and the right upright post 630 are detachably connected with the movable frame 200; the engine mounting top frame 610 is fixedly connected with the top surfaces of the left upright column 620 and the right upright column 630 to form a gantry type, the front joint 640 and the rear joint 650 are detachably mounted on the engine mounting top frame 610, and the lifting lug 660 is fixedly connected with the engine mounting top frame 610; the engine mounting top frame 610 comprises a front beam 611, a rear beam 612 and a longitudinal beam 613, wherein the front beam 611 and the rear beam 612 are arranged in parallel and are fixedly connected with the longitudinal beam 613, the rear beam 612 is fixedly connected with one end of the longitudinal beam 613, and the front beam 611, the rear beam 612 and the longitudinal beam 613 form a shape like the Chinese character 'tu'; the longitudinal beam 613 is provided with a mounting hole 614 for mounting a front joint 640 and a rear joint 650; the left upright post 620 comprises a front post 621, a rear post 622 and upright post connecting rods 623, wherein the front post 621 and the rear post 622 are arranged in parallel and are fixedly connected through the upright post connecting rods 623.

The engine thrust measurement rack comprises a force sensor calibration device, and the force sensor calibration device comprises an industrial personal computer, a display, a standard force sensor data acquisition device and a working force sensor data acquisition device; the industrial personal computer is respectively electrically connected with the display and the servo motor, the standard force sensor data acquisition device is respectively electrically connected with the standard force sensor and the industrial personal computer, and the working force sensor data acquisition device is respectively electrically connected with the working force sensor and the industrial personal computer.

The exhaust system 700 comprises a tail chamber section 710, an ejector low-pressure chamber 720, an ejector shrinkage section 730, an ejector equal straight section 740 and an ejector expansion section 750 which are fixedly connected in sequence, wherein the ejector expansion section 750 is fixedly connected with a variable-frequency diffuser 840 of the tail gas treatment system 800; the tail chamber section 710 is internally and fixedly provided with a small replaceable tail chamber, and the exhaust system 700 is the prior art, which is specifically referred to the patent ZL 201610786167.4 of the Chinese utility model obtained by the applicant.

The tail gas treatment system 800 comprises a first alkali liquor spray tower 810, a second alkali liquor spray tower 820, a circulating water tank 830, a variable frequency diffuser 840, a wastewater treatment device 850 and a closed cooling tower 860.

The circulating water tank 830 is of a closed reinforced concrete structure, a mounting hole for mounting the variable frequency diffuser 840 is formed in one side surface of the circulating water tank 830, the variable frequency diffuser 840 penetrates through the mounting hole and then is horizontally and fixedly mounted in the circulating water tank 830, alkaline circulating water is filled in the circulating water tank 830, and the variable frequency diffuser 840 is located above the alkaline circulating water.

The first alkali liquor spray tower 810 and the second alkali liquor spray tower 820 are identical in structure and fixedly mounted on the upper surface of the circulating water tank 830, and the spray tower air inlets 802 of the first alkali liquor spray tower 810 and the second alkali liquor spray tower 820 are communicated with an exhaust port (not shown in the figure) of the circulating water tank 830, which is located above the alkaline circulating water level and used for exhausting tail gas of the engine test bed exhausted by the variable-frequency diffuser 840, through a pipeline.

The wastewater treatment apparatus 850 is a conventional art, is fixedly installed on the upper surface of the circulation tank 830, and a wastewater inlet (not shown in the figure) of the wastewater treatment equipment 850 is communicated with the spray tower drain 813 of the first alkali liquor spray tower 810 and the second alkali liquor spray tower 820 through pipelines, the water outlet (not shown in the figure) of the wastewater treatment equipment 850 is communicated with the water inlet (not shown in the figure) for introducing purified water above the alkaline circulating water level of the circulating water tank 830 through a pipeline, and sewage discharged from the spray tower drain 813 of the first alkali liquor spray tower 810 and the second alkali liquor spray tower 820 enters the water outlet of the wastewater treatment equipment 850 after being purified by the wastewater treatment equipment 850 and enters the circulating water tank 830 through the water inlet for introducing purified water above the alkaline circulating water level of the circulating water tank 830 through a pipeline. Preferably, a valve is arranged at a water inlet of the circulating water tank 830 above the alkaline circulating water level for introducing clean water, the valve is closed when the tail gas of the engine test bed enters the circulating water tank 830, and the valve is opened when the tail gas of the engine test bed does not exist in the circulating water tank 830 and the wastewater treatment device 850 works.

The closed cooling tower 860 is a conventional one, is fixedly installed on the upper surface of the circulating water bath 830, and a water inlet (not shown in the figure) of the closed cooling tower 860 is communicated with a water outlet (not shown in the figure) of the circulating water tank 830 which is positioned below the alkaline circulating water level and used for leading out alkaline circulating water through a pipeline, a water outlet (not shown) of the closed cooling tower 860 is communicated with a cooling water inlet (not shown) for introducing cooling water above the alkaline circulation water level of the circulation water tank 830 through a pipe, the alkaline circulating water in the circulating water pool 830 enters the water inlet of the closed cooling tower 860 through a pipeline, is cooled by the closed cooling tower 860, is discharged from the water outlet for leading out the alkaline circulating water through a pipeline, enters the circulating water pool 830 from the cooling water inlet for leading in the cooling water above the alkaline circulating water level of the circulating water pool 830. Preferably, a cooling water inlet for introducing cooling water above the alkaline circulation water level and a water outlet for leading out alkaline circulation water below the alkaline circulation water level of the circulation water tank 830 are provided with valves, the valves are closed when tail gas of the engine test bed enters the circulation water tank 830, and the valves are opened when tail gas of the engine test bed does not exist in the circulation water tank 830 and the cooling water inlet of the cooling water works.

Preferably, the circulation water tank 830 is provided with a water injection port for injecting municipal tap water.

Preferably, the circulation water tank 830 is provided with a drain port to be discharged into the sewage treatment system.

Preferably, a detector for detecting the alkalinity and acidity of the alkaline circulating water in the circulating water tank 830, a thermometer for detecting the alkaline circulating water in the circulating water tank 830 and a liquid level meter for displaying the level of the alkaline circulating water in the circulating water tank 830 are arranged in the circulating water tank 830.

Preferably, the circulating water tank 830 is provided with a feed inlet for feeding alkaline materials, so as to ensure that the alkalinity and acidity of the alkaline circulating water in the circulating water tank 830 reaches a predetermined value.

Preferably, the gas containing volume in the circulating water tank 830 is larger than the volume 840 of the variable frequency diffuser, and preferably, the gas containing volume in the circulating water tank 830 is 10 times the volume 840 of the variable frequency diffuser.

The first alkali liquor spraying tower 810 comprises a spraying tower body 801, a spraying tower air inlet 802, a spraying tower air outlet 803, a spraying tower alkali liquor inlet 804, a spraying tower first packing layer 805, a spraying tower first spraying system 806, a spraying tower second packing layer 807, a spraying tower second spraying system 808, a spraying tower liquid level meter 809, a spraying tower circulating pump 811, a spraying tower overflow port 812, a spraying tower drain 813 and a spraying tower maintenance port 814; the spray tower body 801 is of a hollow cylindrical structure, the spray tower air inlet 802, the spray tower alkali liquor inlet 804, the spray tower overflow port 812, the spray tower drain 813 and the spray tower maintenance port 814 are all arranged on the side part of the spray tower body 801, and the spray tower air outlet 803 is arranged on the top of the spray tower body 801; the spray tower inlet 802 is communicated with an exhaust port of the circulating water tank 830 which is positioned above the alkaline circulating water level and used for exhausting tail gas of the engine test bed exhausted by the variable frequency diffuser 840 through a pipeline, the spray tower outlet 803 is communicated with the outside atmosphere, one end of a conveying pipeline for conveying alkaline circulating water to a spray system is communicated with an alkaline circulating water conveying port, which is positioned below the alkaline circulating water level, of the circulating water tank 830, the other end of the conveying pipeline penetrates through the spray tower alkaline liquor inlet 804 and is respectively communicated with a spray tower first spray system 806 and a spray tower second spray system 808, the spray tower circulating pump 811 is arranged outside the spray tower body 801, the basic circulating water pump in the circulating water tank 830 is conveyed to the first spraying system 806 of the spraying tower and the second spraying system 808 of the spraying tower through a conveying pipeline for conveying the basic circulating water to the spraying system; preferably, a valve is arranged at an alkaline circulating water conveying port of the circulating water tank 830, which is located below the alkaline circulating water level and used for conveying alkaline circulating water, and the valve is opened when tail gas of an engine test bed enters the circulating water tank 830, and closed when tail gas of the engine test bed does not exist in the circulating water tank 830; further preferably, the conveying pipeline for conveying the alkaline circulating water to the spraying system is provided with a seal through the spraying tower alkaline input port 804; the arrangement position of the spray tower overflow port 812 is higher than the spray tower air inlet 802, the spray tower alkali liquor input port 804 and the spray tower drain 813, and the spray tower drain 813 is communicated with the wastewater inlet of the wastewater treatment equipment 850 through a pipeline. Along the axis of the spray tower body 801, a first spray tower filler layer 805, a first spray tower spraying system 806, a second spray tower filler layer 807 and a second spray tower spraying system 808 are fixedly installed inside the spray tower body 801 from bottom to top in sequence, and preferably, the fillers in the first spray tower filler layer 805 and the second spray tower filler layer 807 are ceramic fillers. The spray tower liquid level meter is arranged on the side part of the spray tower body 801 and is positioned on the lower part of the first packing layer 805 of the spray tower and used for monitoring the water level of the wastewater at the bottom of the spray tower body 801.

The variable-frequency diffuser 840 comprises a variable-frequency diffuser cylinder 841 and a variable-frequency diffuser diversion cone 843, the variable-frequency diffuser cylinder 841 is a hollow circular cylinder, a plurality of variable-frequency diffuser air outlet holes 842 for discharging gas are formed in the surface of the cylinder, and the variable-frequency diffuser air outlet holes 842 are through holes penetrating through the circular cylinder; the variable frequency diffuser diversion cone 843 is cone-shaped, the cone surface of the variable frequency diffuser diversion cone 843 is arranged in the circular cylinder, the diameter of the excircle at the bottom of the variable frequency diffuser diversion cone 843 is the same as the inner diameter of the circular cylinder, the excircle at the bottom of the variable frequency diffuser diversion cone 843 is fixedly connected with one end surface of the circular cylinder, one end of the variable frequency diffuser cylinder 841 is closed, tail gas exhausted from an engine test bench enters from the end surface of one open end of the variable frequency diffuser cylinder 841, is guided by the variable frequency diffuser diversion cone 843 and is exhausted from a plurality of variable frequency diffuser vent holes 842, and the gas entering the variable frequency diffuser cylinder 841 is guided by the variable frequency diffuser diversion cone 843 in the shape of a cone, so that the gas entering the variable frequency diffuser cylinder 841 is uniformly exhausted from the plurality of variable frequency diffuser vent holes 842 to facilitate subsequent tail gas treatment, the tail gas treatment capacity of the equipment is improved.

The method for measuring the thrust of the supersonic engine and treating and discharging tail gas by using the supersonic engine test bed thrust measurement exhaust device comprises the following steps:

s100), installing the tested engine 1 and measuring section

S110), sequentially enabling a measuring section for measuring engine air inlet parameters to pass through the first measuring section bracket 410 and the second measuring section bracket 420, and placing the measuring section in the first measuring section bracket 410 and the second measuring section bracket 420;

s120), mounting the front joint 640 and the rear joint 650 to the longitudinal beam 613 according to the suspension position of the engine 1 under test;

s130), mounting the engine mounting frame 600 on the movable frame body 210, and then mounting the tested engine 1 on the front joint 640 and the rear joint 650;

s140) adjusting the measuring section, connecting one end of the measuring section with the air inlet of the tested engine 1, adjusting a positioning mechanism screw 4143 in the measuring section bracket positioning mechanism 414, enabling the measuring section and the engine air inlet to be coaxial, and then sequentially rotating a positioning mechanism locking nut 4142 and a positioning mechanism nut 4141 in the measuring section bracket positioning mechanism 414.

S200), disassembling and locking device

The fastening nut 530 is loosened, the fastening screw 510 is pulled out from the vertical plate of the rear mounting seat 160, the fastening baffle 520 and the baffle at the rear end of the movable frame body 210 in sequence, and then the fastening baffle 520 is taken out.

S300), determining the error of the working force sensor

S310), the industrial personal computer controls the servo motor to start to drive the hydraulic loading device to work, the hydraulic loading device drives the calibration oil cylinder to work, a piston of the calibration oil cylinder drives the standard force sensor 340 to displace so as to drive the movable frame body 210 to displace, and force is applied to the working force sensor 350 in the displacement process of the movable frame body 210;

s320), the hydraulic loading device drives the calibration oil cylinder to work, and the loading force is unloaded to a zero value after the loading force is continuously applied to the standard force sensor 340 to a preset value; the standard force sensor data acquisition device and the working force sensor data acquisition device respectively acquire force values output by the standard force sensor 340 and the working force sensor 350 in the loading force applying and unloading processes and feed back the force values to the industrial personal computer, and the display displays the force values output by the standard force sensor 340 and the working force sensor 350 in the loading force applying and unloading processes, which are acquired by the standard force sensor data acquisition device and the working force sensor data acquisition device;

s330), drawing characteristic curve graphs of the standard force sensor 340 and the working force sensor 350 according to force values output by the standard force sensor 340 and the working force sensor 350 in the process of applying loading force and unloading loading force, wherein the force values are displayed by a display and acquired by the standard force sensor data acquisition device and the working force sensor data acquisition device; under the same loading force, the difference between the force value output by the working force sensor 350 acquired by the working force sensor data acquisition device and the force value output by the standard force sensor 340 acquired by the standard force sensor data acquisition device is the working force sensor error.

S400), starting a spraying system

S410), keeping a valve arranged at a water inlet, which is arranged above the alkaline circulating water level and used for introducing clean water, of the circulating water tank 830, closing valves at a cooling water inlet, which is arranged above the alkaline circulating water level and used for introducing cooling water, and a water outlet, which is arranged below the alkaline circulating water level and used for leading out alkaline circulating water, of the circulating water tank 830, and opening a valve at an alkaline circulating water delivery port, which is arranged below the alkaline circulating water level and used for delivering alkaline circulating water, of the circulating water tank 830.

S420), starting a spray tower circulating pump 811 to pump out the alkaline circulating water in the circulating water tank 830 and convey the alkaline circulating water to a first spray system 806 and a second spray system 808 of the spray tower through a conveying pipeline for conveying the alkaline circulating water to the spray systems, starting the first spray system 806 and the second spray system 808 of the spray tower, starting the alkaline circulating water to spray, and keeping the spray tower circulating pump 811, the first spray system 806 and the second spray system 808 of the spray tower to work.

S500), simulating the high-altitude flight environment pressure of the engine

Starting an ejector in the exhaust system 700, and extracting gas in the high-altitude simulation cabin 900 to enable the pressure of the high-altitude simulation cabin 900 to be the same as the environmental pressure of the engine at the altitude in high-altitude flight;

s600), measuring thrust of tested engine

After the engine is ignited and the measurement section detects that the air inlet parameter of the tested engine 1 reaches the working condition, the display displays the force value output by the working force sensor 350 and collected by the working force sensor data collection device.

S700) and tail gas treatment

S710) exhausting tail gas of the engine test bed by the exhaust system 700, introducing the tail gas into the end face of one open end of the variable-frequency diffuser cylinder 841, guiding the tail gas by the variable-frequency diffuser guiding cone 843, and introducing the tail gas into the first alkali lye spray tower 810 and the spray tower air inlet 802 of the second alkali lye spray tower 820 respectively through an exhaust port which is communicated with the circulating water tank 830 and is positioned above the alkaline circulating water level and used for exhausting the tail gas of the engine test bed exhausted by the variable-frequency diffuser 840 and a pipeline of the spray tower air inlet 802.

S720), after the tail gas of the engine test bed entering the air inlet 802 of the spray tower sequentially passes through the first packing layer 805 of the spray tower and the second packing layer 807 of the spray tower, the tail gas of the engine test bed is discharged from the air outlet 803 of the spray tower, and when the tail gas of the engine test bed passes through the first packing layer 805 of the spray tower and the second packing layer 807 of the spray tower, alkaline circulating water and the tail gas of the engine test bed are subjected to degradation treatment.

S800), closing the spraying system

After the engine test is finished and the time reaches the preset time, preferably 2-4 hours, and more preferably 3 hours after the test is finished, the spray tower circulating pump 811 is closed, and the valve arranged at the alkaline circulating water delivery port for delivering alkaline circulating water below the alkaline circulating water level of the circulating water tank 830 is closed after the first spray system 806 and the spray tower second spray system 808 are closed.

S900) wastewater treatment

S910), keeping a valve which is arranged above the alkaline circulating water level and is used for introducing cooling water, a valve which is arranged below the alkaline circulating water level and is used for leading out alkaline circulating water, and a valve which is arranged at the alkaline circulating water delivery port of the circulating water tank 830 and is used for delivering alkaline circulating water, close, opening a valve which is arranged at the water inlet of the circulating water tank 830 and is used for introducing purified water and a spray tower drain 813, starting the wastewater treatment equipment 850, the sewage in the first alkali liquor spray tower 810 and the second alkali liquor spray tower 820 is discharged through a spray tower drain 813, enters the wastewater treatment equipment 850 after purification treatment, enters a water outlet of the wastewater treatment equipment 850, enters a water inlet for introducing purified water above an alkali circulating water level of the circulating water tank 830 through a pipeline, and then flows into the circulating water tank 830.

S920), after the spray tower liquid level meter 809 displays that no sewage exists in the first alkali liquor spray tower 810 and the second alkali liquor spray tower 820, closing the wastewater treatment equipment 850, and respectively closing a valve arranged at a water inlet for introducing clean water above an alkali circulating water level of the circulating water tank 830 and a spray tower sewage outlet 813.

S1000), cooling alkaline circulating water

Keeping a valve arranged at a water inlet for introducing clean water above an alkaline circulating water level of the circulating water tank 830 and a valve arranged at an alkaline circulating water delivery port for delivering alkaline circulating water below the alkaline circulating water level of the circulating water tank 830 closed, opening a cooling water inlet for introducing cooling water above the alkaline circulating water level and a valve arranged at a water outlet for leading out alkaline circulating water below the alkaline circulating water level, starting the closed cooling tower 860, allowing the alkaline circulating water in the circulating water tank 830 to enter the closed cooling tower 860 through the water outlet for leading out alkaline circulating water below the alkaline circulating water level after cooling, and allowing the alkaline circulating water to enter the circulating water tank 830 through the cooling water inlet for introducing cooling water above the alkaline circulating water level until a thermometer for detecting the alkaline circulating water in the circulating water tank 830 displays that the temperature of the alkaline circulating water in the circulating water tank 830 is not higher At a predetermined value, preferably, the predetermined value is 30 ℃.

Preferably, after each engine test, alkaline materials are fed through a feeding port for feeding alkaline materials, which is arranged in the circulating water tank 830, so that the pH value of alkaline circulating water in the circulating water tank 830 reaches a predetermined value.

Preferably, when the level of the alkaline circulating water in the circulating water tank 830 is lower than a predetermined value, tap water is injected through a water injection port provided in the circulating water tank 830 and used for injecting municipal tap water, and the predetermined value is preferably 2/3 of the depth of the circulating water tank 830.

Preferably, the alkaline circulating water in the circulating water tank 830 is discharged into the sewage treatment system through a discharge port of the circulating water tank 830, which is provided to discharge into the sewage treatment system, for a predetermined period, and preferably, the predetermined period is 3 months.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (8)

1. A supersonic engine test bed thrust measurement exhaust device is characterized by comprising an engine thrust measurement rack, an exhaust system, a tail gas treatment system and a high-altitude simulation cabin; the high-altitude simulation cabin is of a sealed shell structure, the engine thrust measurement rack is fixedly arranged in the high-altitude simulation cabin, and the tested engine is arranged on the engine thrust measurement rack; one end of the exhaust system penetrates through the surface of the shell of the high-altitude simulation cabin and is fixedly installed in the high-altitude simulation cabin, and the other end of the exhaust system is fixedly communicated with the tail gas treatment system;

the tail gas treatment system of the engine test bed comprises a first alkali liquor spray tower, a second alkali liquor spray tower, a circulating water tank, a variable-frequency diffuser, waste water treatment equipment and a closed cooling tower;

one side surface of the circulating water pool is provided with a mounting hole for mounting a variable frequency diffuser, the variable frequency diffuser is horizontally and fixedly mounted in the circulating water pool after penetrating through the mounting hole, alkaline circulating water is filled in the circulating water pool, and the variable frequency diffuser is positioned above the alkaline circulating water;

the first alkali liquor spray tower and the second alkali liquor spray tower are identical in structure and are fixedly arranged on the upper surface of the circulating water tank, and air inlets of the spray towers of the first alkali liquor spray tower and the second alkali liquor spray tower are communicated with an exhaust port, located above an alkaline circulating water level, of the circulating water tank through a pipeline and used for exhausting tail gas of an engine test bed exhausted by the variable-frequency diffuser;

the waste water treatment equipment is fixedly arranged on the upper surface of the circulating water tank, a waste water inlet of the waste water treatment equipment is communicated with the drain outlets of the spray towers of the first alkali liquor spray tower and the second alkali liquor spray tower through pipelines, a water outlet of the waste water treatment equipment is communicated with a water inlet, positioned above the alkaline circulating water level, of the circulating water tank and used for introducing purified water through a pipeline, and a valve is arranged at a water inlet, positioned above the alkaline circulating water level, of the circulating water tank and used for introducing purified water;

closed cooling tower fixed mounting is at circulating water tank's upper surface, and the water inlet of closed cooling tower passes through the pipeline and is used for deriving the delivery port intercommunication of alkaline circulating water with the circulating water pond below being located alkaline circulating water level, the delivery port of closed cooling tower passes through the pipeline and the circulating water pond be located the cooling water inlet intercommunication that is used for introducing the cooling water of alkaline circulating water level top, the cooling water inlet department that is used for introducing the cooling water and the delivery port that is used for deriving alkaline circulating water that is located alkaline circulating water level below of circulating water pond that is located alkaline circulating water level top all are provided with the valve.

2. The supersonic engine test stand thrust measurement exhaust apparatus of claim 1, wherein: the engine thrust measuring rack comprises a fixed rack, a movable rack and a loading measuring device; the loading measuring device comprises a spring piece, a loading mechanism and a working force sensor; the movable frame is hung on the fixed frame through the spring piece, the loading mechanism is fixedly installed on the fixed frame, and two ends of the working force sensor are respectively connected with the fixed frame and the movable frame.

3. The supersonic engine test stand thrust measurement exhaust apparatus of claim 2, wherein: the movable frame comprises a movable frame body, a first movable frame spring piece mounting seat, a movable frame working force sensor mounting seat, a second movable frame spring piece mounting seat and a movable frame standard force sensor mounting seat; the movable frame standard force sensor mounting seat is fixedly mounted on the bottom surface of the front end of the movable frame body along the length direction of the movable frame body; the first movable frame spring piece mounting seat comprises 2 fixed mounting seats which are fixedly mounted on the bottom surface of the front end of the movable frame body and are respectively positioned on two sides of the movable frame standard force sensor mounting seat; the movable frame working force sensor mounting seat is fixedly mounted at the bottom of the movable frame body and is positioned on a central line along the length direction of the movable frame body; the second movable frame spring piece mounting seat comprises 2 spring pieces which are respectively fixedly mounted on the bottom surface of the rear end of the movable frame body.

4. The supersonic engine test stand thrust measurement exhaust apparatus of claim 3, wherein:

the fixed frame comprises a base, a front mounting seat, a loading mechanism mounting seat, a first fixed frame spring piece mounting seat, a fixed frame working force sensor mounting seat, a rear mounting seat and a second fixed frame spring piece mounting seat; the base is of a cuboid structure, the front mounting seat and the rear mounting seat are fixedly mounted at the front end and the rear end of the base respectively along the length direction of the base, the rear mounting seat comprises a transverse plate and a vertical plate, and the transverse plate and the vertical plate form an L shape; the loading mechanism mounting seats are fixedly mounted on the front mounting seat, the number of the first fixing frame spring piece mounting seats is 2, and the first fixing frame spring piece mounting seats are fixedly mounted at the front end of the base and are respectively positioned on two sides of the front mounting seat; the fixed frame working force sensor mounting seat is fixedly arranged on the base and is positioned on a central line along the length direction of the base; the second fixed frame spring piece mounting seat comprises 2 spring pieces which are fixedly mounted at the rear end of the base and are respectively positioned on two sides of the rear mounting seat.

5. The supersonic engine test stand thrust measurement exhaust apparatus of claim 4, wherein: the loading measuring device comprises a first spring piece, a second spring piece, a loading mechanism, a standard force sensor and a working force sensor; the number of the first spring pieces is 2, each first spring piece is fixedly connected with a first fixed frame spring piece mounting seat and a first movable frame spring piece mounting seat, the number of the second spring pieces is 2, and two ends of each second spring piece are fixedly connected with a second fixed frame spring piece mounting seat and a second movable frame spring piece mounting seat respectively; the loading mechanism is fixedly arranged on a transverse plate of the front mounting seat, the standard force sensor is fixedly arranged on a baffle plate at the front end of the movable frame body, and the loading mechanism and the standard force sensor are coaxially arranged and are parallel to the central line of the base along the length direction; the two ends of the working force sensor are respectively and fixedly connected with the fixed frame working force sensor mounting seat and the movable frame working force sensor mounting seat, and the working force sensor, the loading mechanism and the standard force sensor are coaxially arranged.

6. The thrust measurement exhaust device of a supersonic engine test stand according to claim 1, wherein the first alkali liquor spray tower comprises a spray tower body, a spray tower air inlet, a spray tower air outlet, a spray tower alkali liquor inlet, a spray tower first packing layer, a spray tower first spray system, a spray tower second packing layer, a spray tower second spray system, a spray tower level gauge, a spray tower circulating pump, a spray tower overflow port, a spray tower drain port and a spray tower maintenance port; the spray tower body is of a hollow cylindrical structure, a spray tower air inlet, a spray tower alkali liquor inlet, a spray tower overflow port, a spray tower drain outlet and a spray tower maintenance port are arranged on the side part of the spray tower body, and a spray tower air outlet is arranged on the top of the spray tower body; the spraying tower circulating pump is arranged outside the tower body of the spraying tower and is used for pumping out the alkaline circulating water in the circulating water tank and conveying the alkaline circulating water to the first spraying system of the spraying tower and the second spraying system of the spraying tower through the conveying pipeline for conveying the alkaline circulating water to the spraying system; a valve is arranged at an alkaline circulating water conveying port of the circulating water tank, which is positioned below the alkaline circulating water level and used for conveying alkaline circulating water, the arrangement position of an overflow port of the spray tower is higher than that of an air inlet of the spray tower, an alkaline liquor inlet of the spray tower and a drain outlet of the spray tower are arranged, and the drain outlet of the spray tower is communicated with a wastewater inlet of wastewater treatment equipment through a pipeline; along the axis of the spray tower body, a first packing layer of the spray tower, a first spraying system of the spray tower, a second packing layer of the spray tower and a second spraying system of the spray tower are sequentially and fixedly installed inside the spray tower body from bottom to top, and a liquid level meter of the spray tower is arranged on the lower portion of the first packing layer of the spray tower on the side portion of the spray tower body and used for monitoring the water level of wastewater at the bottom of the spray tower body.

7. The supersonic engine test bed thrust measurement exhaust device according to claim 1, wherein the variable frequency diffuser of the engine test bed exhaust treatment system comprises a variable frequency diffuser cylinder and a variable frequency diffuser guide cone, the variable frequency diffuser cylinder is a hollow circular cylinder, a plurality of variable frequency diffuser air outlet holes for discharging gas are arranged on the surface of the cylinder, and the plurality of variable frequency diffuser air outlet holes are through holes penetrating through the circular cylinder; the frequency conversion diffuser water conservancy diversion awl is the cone type, and the conical surface of frequency conversion diffuser water conservancy diversion awl sets up inside circular cylinder, and the bottom excircle diameter of frequency conversion diffuser water conservancy diversion awl is the same with circular cylinder's internal diameter, and the bottom excircle and a circular cylinder terminal surface fixed connection of frequency conversion diffuser water conservancy diversion awl will frequency conversion diffuser cylinder one end seal.

8. The supersonic engine test stand thrust measurement exhaust apparatus of claim 1, wherein: a detector for detecting the pH value of the alkaline circulating water in the circulating water tank, a thermometer for detecting the alkaline circulating water in the circulating water tank and a liquid level meter for displaying the level of the alkaline circulating water in the circulating water tank are arranged in the circulating water tank.

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