An aviation piston engine fuel injection performance test device

Abstract

The invention discloses an aviation piston engine fuel injection performance test device, which relates to the technical field of fuel injector performance detection. The device comprises a base, a spatial rotation mechanism is provided on the base, a detection mechanism is installed in the spatial rotation mechanism, and the detection mechanism is connected to a cleaning mechanism; the detection mechanism comprises a fuel injection assembly, the fuel injection assembly comprises an atomizing pipe, a fuel injector is provided on the atomizing pipe, the fuel injector is connected to an oil barrel, the atomizing pipe is connected to a detection pipe, the detection pipe is provided with an atomizing coloring assembly, a closed pipe is provided at the outer end of the detection pipe, a connector is provided on one side of the closed pipe, the connector is connected to a light generator, the light generator is fixedly mounted on a fixed frame, a photosensitive plate is provided on the side of the closed pipe away from the connector, and the closed pipe is made of opaque material; the invention colors the atomized fuel with a light-absorbing material through the fuel injector and the atomizing coloring assembly, reduces the light intensity of the detection light reaching the photosensitive plate, and thus detects the atomization effect.

Description

Technical Field

[0001] The invention relates to the technical field of fuel injector performance detection, in particular to a fuel injection performance test device for an aviation piston engine. Background Art

[0002] A piston aircraft engine is a reciprocating internal combustion engine that powers aircraft. It's a four-stroke, spark-ignited gasoline engine. Each piston reciprocates four times within its cylinder for every two revolutions of the crankshaft, completing a cycle. Each piston movement is called a "stroke." The four strokes are intake, compression, expansion, and exhaust, respectively. It primarily consists of a crankshaft, connecting rod, piston, cylinder, distributor mechanism, and casing.

[0003] Aircraft engines need to ensure that the fuel supply system operates reliably when the aircraft is rolling or undergoing challenging flight postures, thereby providing continuous power to the aircraft. The injector's fuel atomization performance during flips or rolls needs to be simulated to ensure reliable fuel atomization during various flight maneuvers. Existing injector performance testing equipment is unable to obtain fuel atomization performance data in complex environments. Summary of the Invention

[0004] The purpose of the present invention is to provide an aviation piston engine fuel injection performance test device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A device for testing the fuel injection performance of an aviation piston engine comprises a base, wherein a spatial rotating mechanism is provided on the base, a detecting mechanism is installed in the spatial rotating mechanism, and the detecting mechanism is connected to a cleaning mechanism.

[0007] The detection mechanism includes an oil injection assembly, which includes an atomizing tube, an oil injector is provided on the atomizing tube, the oil injector is connected to an oil barrel, the atomizing tube is connected to a detection tube, the detection tube is provided with an atomizing coloring assembly, a fixing frame is provided on the side of the detection tube, the fixing frame is fixedly installed on the outside of the detection tube, a closed tube is provided on the outer end of the detection tube, a connecting head is provided on one side of the closed tube, the connecting head is connected to a light generator, the light generator is fixedly installed on the fixing frame, a photosensitive plate is provided on the side of the closed tube away from the connecting head, the photosensitive plate is fixedly installed on the side of the detection tube, a fixing block is installed on the photosensitive plate, the fixing block is fixedly connected to the fixing frame, and the closed tube is made of opaque material.

[0008] As a further solution of the present invention: the cleaning mechanism includes an "L"-shaped cleaning tube, which is connected to the atomizing tube, a fixed ring is fixedly provided in the cleaning tube, a flexible push rod is inserted on the fixed ring, a cleaning piston is provided at the end of the flexible push rod, the cleaning piston is installed in cooperation with the cleaning tube and the detection tube, and a "U"-shaped structure is formed between the detection tube and the cleaning tube, a telescopic motor is fixedly installed at one end of the cleaning tube away from the cleaning piston, a pushing ring is connected to the end of the telescopic motor, and the pushing ring is connected to the flexible push rod, a return spring is installed in the cleaning tube between the pushing ring and the fixed ring, the return spring is sleeved on the outside of the flexible push rod, and a piston cleaning assembly is also provided at the end of the detection tube.

[0009] As a further solution of the present invention: the piston cleaning assembly includes a second rotating motor arranged on a fixed frame, the second rotating motor is connected to a cleaning disk, cleaning brushes are evenly arranged on the cleaning disk, an oil cleaner is arranged in the cleaning brush, and the cleaning disk coincides with the axis of the detection tube during rotation.

[0010] As a further solution of the present invention: an atomization coloring component is arranged between the detection tube and the atomization tube, and the atomization coloring component includes a storage tube fixedly installed between the cleaning tube, and color-absorbing powder is stored in the storage tube. A discharge pipe is evenly arranged on the end of the storage tube, and a receiving tray is rotatably installed on the fixed frame. The receiving tray is symmetrically arranged, and funnel-shaped blowing holes are evenly arranged on the receiving tray. The opening diameter of the blowing hole at one end facing the injector is larger than the opening diameter of the end away from the injector. The atomization tube is fixedly connected to the detection tube through the fixed frame, and the atomization tube is disconnected from the detection tube. The thickness of the receiving tray is the same as the gap between the atomization tube and the detection tube. The edge of the receiving tray is provided with a rounded corner, and the receiving tray is rotatably installed between the rotating motor and the fixed frame.

[0011] As a further solution of the present invention: the spatial rotation mechanism includes a symmetrically arranged arc-shaped support frame, the arc-shaped support frame is fixedly installed on the base, a matching groove is provided in the arc-shaped support frame, a mounting ring is slidingly provided in the matching groove, a spherical matching block 1 is provided at the end of the mounting ring, the mounting ring is slidingly installed between the spherical matching block 1 and the matching groove, a gear ring is rotatably installed in the mounting ring, a driving gear is provided at the edge of the mounting ring, the driving gear and the gear ring are meshed with each other, the driving gear is connected to the power component, the gear ring is rotatably installed in the mounting ring, the detection mechanism is connected to the inner ring of the gear ring, the two ends of the mounting ring are rotatably connected to the mounting column, the mounting column is fixedly connected to the base, and a driving motor is provided on the rotation axis of the mounting ring.

[0012] As a further solution of the present invention: a matching frame is symmetrically arranged on the inner side of the gear ring, and the matching frame is fixedly connected to the inner wall of the gear ring. The matching frame is arranged in an arc shape, and connecting columns are arranged at both ends of the "U"-shaped structure composed of the detection tube and the cleaning tube. A spherical matching block 2 is arranged at the end of the connecting column, and an arc groove is arranged in the matching frame, and the spherical matching block 2 is slidably installed between the arc groove.

[0013] As a further solution of the present invention: the arc groove is provided with support springs at both ends of the spherical matching block 2.

[0014] As a further solution of the present invention: an annular groove is provided at the bottom of the gear ring, a ball is rotatably provided on the inner side of the mounting ring, the ball is embedded and rollingly installed between the mounting ring, and the ball is facing the groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The fuel injector sends the fuel in the fuel barrel into the detection tube through the atomizing tube. The detection tube is made of transparent material. A closed tube is connected to the side of the detection tube and the closed tube is made of opaque material to block the light. The fuel sprayed through the fuel injector is colored by the atomizing coloring component. The detection light is emitted into the detection tube through the light generator. The colored atomized fuel will reduce the penetration effect of the detection light, so that the intensity of the light reaching the photosensitive plate is weakened. The better the atomizing effect of the fuel injector, the higher the density of the colored atomized fuel filling the detection tube, thereby reducing the penetration of the detection light. Then, the effect of the atomizing fuel of the fuel injector can be judged according to the light intensity detected by the photosensitive plate.

[0017] (2) The detection tube is cleaned by a cleaning mechanism, so that the detection mechanism can detect the effect of atomized fuel of the injector in different postures. When the detection tube needs to be cleaned, a flexible push rod and a cleaning piston are arranged in the detection tube, and the flexible push rod is driven to move by a telescopic motor, so that the cleaning piston enters the detection tube along the cleaning tube, and the inner wall of the cleaning tube is cleaned by the cleaning piston. When the cleaning piston reaches the end of the detection tube, the piston cleaning assembly cleans the cleaning piston, so as to prevent the cleaning piston from contaminating the inner wall of the detection tube again when it retreats.

[0018] (3) The detection mechanism is connected through an arc-shaped support frame, a mounting ring, and a gear ring. The driving motor drives the mounting ring to rotate around the mounting axis. At the same time, an arc-shaped support frame is provided to support the mounting ring to increase the installation stability of the mounting ring. At the same time, a driving gear is provided on the mounting ring to drive the gear ring to rotate inside the mounting ring, so that the detection mechanism installed on the inner side of the gear ring can obtain more consistent with the injection effect simulation detection data of the injector under various complex postures. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 It is a schematic diagram of the connection structure between the cleaning tube and the detection mechanism in the present invention.

[0021] Figure 3 Schematic diagram of the internal structure of the cleaning mechanism of the present invention.

[0022] Figure 4 Schematic diagram of the connection structure between the detection mechanism and the fixing frame in the present invention.

[0023] Figure 5 It is a schematic diagram of the cross-section structure of the detection mechanism in the present invention.

[0024] Figure 6 It is a structural diagram of the spatial rotation mechanism in the present invention.

[0025] Figure 7 Schematic diagram of the connection structure between the gear ring and the mounting ring in the present invention.

[0026] In the figure: 1. Base; 10. Mounting column; 11. Driving motor; 2. Spatial rotation mechanism; 20. Arc support frame; 21. Matching groove; 22. Spherical matching block 1; 23. Mounting ring; 24. Driving gear; 25. Gear ring; 250. Groove; 251. Ball; 26. Matching frame; 27. Support spring; 28. Arc groove; 29. ​​Spherical matching block 2; 3. Detection mechanism; 30. Fixing frame; 31. Closing tube; 32. Light generator; 33. Connector; 34. Photosensitive plate; 3 5. Fixed block; 4. Cleaning mechanism; 40. Connecting column; 41. Cleaning tube; 42. Cleaning piston; 43. Flexible push rod; 44. Fixed ring; 45. Return spring; 46. Push ring; 47. Telescopic motor; 48. Rotating motor 2; 49. Cleaning plate; 410. Cleaning brush; 5. Oil spray assembly; 50. Oil injector; 51. Atomizing tube; 52. Detection tube; 6. Atomizing coloring assembly; 60. Storage cylinder; 61. Discharge tube; 62. Receiving plate; 63. Blowing hole; 64. Rotating motor 1. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be further described in detail below in conjunction with specific implementation methods.

[0028] like Figure 1 、 Figure 2 As shown, an aviation piston engine fuel injection performance test device includes a base 1, a spatial rotating mechanism 2 is provided on the base 1, a detection mechanism 3 is installed in the spatial rotating mechanism 2, and the detection mechanism 3 is connected to a cleaning mechanism 4.

[0029] like Figure 4 、 Figure 5 As shown, the detection mechanism 3 includes an oil injection assembly 5, which includes an atomizing pipe 51. The atomizing pipe 51 is provided with an injector 50, and the injector 50 is connected to an oil barrel. The atomizing pipe 51 is connected to a detection pipe 52, and the detection pipe 52 is provided with an atomizing coloring assembly 6. A fixing frame 30 is provided on the side of the detection pipe 52, and the fixing frame 30 is fixedly installed on the outside of the detection pipe 52. A closed pipe 31 is provided at the outer end of the detection pipe 52, and a connector 33 is provided on one side of the closed pipe 31. The connector 33 is connected to the light generator 32, and the light generator 32 is fixedly installed on the fixing frame 30. A photosensitive plate 34 is provided on the side of the closed pipe 31 away from the connector 33. The photosensitive plate 34 is fixedly installed on the side of the detection pipe 52, and a fixing block 35 is installed on the photosensitive plate 34. The fixing block 35 is fixedly connected to the fixing frame 30, and the closed pipe 31 is made of opaque material.

[0030] Specifically, the injector 50 delivers the fuel in the oil barrel into the detection tube 52 through the atomizing tube 51, wherein the detection tube 52 is made of transparent material. By connecting the closed tube 31 to the side of the detection tube 52, the detection tube 52 is shielded from light in combination with the closed tube 31 made of opaque material. The fuel sprayed through the injection pipe is colored by the atomizing coloring component 6, and the detection light is emitted into the detection tube 52 through the light generator 32. The colored atomized fuel will reduce the penetration effect of the detection light, so that the intensity of the light reaching the photosensitive plate 34 is weakened. The better the atomizing effect of the injector 50, the higher the density of the colored atomized fuel filling the detection tube 52, thereby reducing the penetration of the detection light. Then, the effect of the atomizing fuel of the injector 50 can be judged according to the light intensity detected by the photosensitive plate 34.

[0031] Further, such as Figure 2 、 Figure 3 As shown, the cleaning mechanism 4 includes an "L"-shaped cleaning tube 41, which is connected to the atomizing tube 51, and a fixing ring 44 is fixedly provided in the cleaning tube 41. A flexible push rod 43 is inserted on the fixing ring 44, and a cleaning piston 42 is provided at the end of the flexible push rod 43. The cleaning piston 42 is installed in cooperation with the cleaning tube 41 and the detection tube 52, and a "U"-shaped structure is formed between the detection tube 52 and the cleaning tube 41. A telescopic motor 47 is fixedly installed at one end of the cleaning tube 41 away from the cleaning piston 42, and a pushing ring 46 is connected to the end of the telescopic motor 47. The pushing ring 46 is connected to the flexible push rod 43, and a return spring 45 is installed in the cleaning tube 41 between the pushing ring 46 and the fixing ring 44. The return spring 45 is sleeved on the outside of the flexible push rod 43, and a piston cleaning assembly is also provided at the end of the detection tube 52.

[0032] Specifically, some of the fuel in liquid form and the coloring material adhere to the inner wall of the detection tube 52. The detection tube 52 is cleaned by the cleaning mechanism 4, which facilitates the detection mechanism 3 to detect the effect of the atomized fuel of the injector 50 in different postures. When the detection tube 52 needs to be cleaned, a flexible push rod 43 and a cleaning piston 42 are provided in the detection tube 52. The flexible push rod 43 is driven to move by the telescopic motor 47, so that the cleaning piston 42 enters the detection tube 52 along the cleaning tube 41. The cleaning piston 42 cleans the inner wall of the cleaning tube 41. When the cleaning piston 42 reaches the end of the detection tube 52, the piston cleaning assembly cleans the cleaning piston 42 to prevent the cleaning piston 42 from contaminating the inner wall of the detection tube 52 again when it retracts.

[0033] Further, such as Figure 4 As shown, the piston cleaning assembly includes a rotating motor 48 arranged on a fixed frame 30, and the rotating motor 48 is connected to a cleaning disk 49. Cleaning brushes 410 are evenly arranged on the cleaning disk 49, and an oil cleaner is arranged in the cleaning brush 410. The cleaning disk 49 coincides with the axis of the detection tube 52 during rotation.

[0034] Specifically, the surface of the cleaning piston 42 is cleaned by rotating the cleaning disc 49 and the cleaning brush 410, and the oil cleaner provided in the cleaning brush 410 is used to apply an oil cleaning agent to the cleaning piston 42, so that the oil on the cleaning piston 42 can be reliably cleaned.

[0035] Further, such as Figure 4 As shown, an atomizing coloring component 6 is provided between the detection tube 52 and the atomizing tube 51, and the atomizing coloring component 6 includes a storage cylinder 60 fixedly installed between the cleaning tube 41, and color-absorbing powder is stored in the storage cylinder 60. A discharge pipe 61 is evenly provided at the end of the storage cylinder 60, and a receiving tray 62 is rotatably installed on the fixed frame 30. The receiving tray 62 is symmetrically arranged, and funnel-shaped blowing holes 63 are evenly provided on the receiving tray 62. The opening diameter of the blowing hole 63 at one end facing the injector 50 is larger than the opening diameter of the end away from the injector 50. The atomizing tube 51 is fixedly connected to the detection tube 52 through the fixed frame 30, and the atomizing tube 51 is disconnected from the detection tube 52. The thickness of the receiving tray 62 is the same as the gap between the atomizing tube 51 and the detection tube 52. The edge of the receiving tray 62 is provided with a rounded corner, and the receiving tray 62 is rotatably installed between the fixed frame 30 by a rotating motor 64.

[0036] Specifically, the receiving plate 62 is brought into contact with the discharge pipe 61 during rotation, causing the color-absorbing powder to fall into the funnel-shaped blow-out hole 63. The fuel is atomized by the injector 50, so that the color-absorbing material mixed with the fuel is dispersed into the detection tube 52, thereby detecting the intensity of light reaching the photosensitive plate 34 and further determining the atomization effect of the injector 50.

[0037] Further, such as Figure 6 As shown, the spatial rotation mechanism 2 includes a symmetrically arranged arc-shaped support frame 20, and the arc-shaped support frame 20 is fixedly mounted on the base 1. A matching groove 21 is provided in the arc-shaped support frame 20, and a mounting ring 23 is slidingly provided in the matching groove 21. A spherical matching block 22 is provided at the end of the mounting ring 23, and the mounting ring 23 is slidably installed between the spherical matching block 22 and the matching groove 21. A gear ring 25 is rotatably installed in the mounting ring 23, and a driving gear 24 is provided on the edge of the mounting ring 23. The driving gear 24 and the gear ring 25 are meshed with each other. The driving gear 24 is connected to the power component, and the gear ring 25 is rotatably installed in the mounting ring 23. The detection mechanism 3 is connected to the inner ring of the gear ring 25, and the two ends of the mounting ring 23 are rotatably connected to the mounting column 10. The mounting column 10 is fixedly connected to the base 1, and a driving motor 11 is provided on the rotation axis of the mounting ring 23.

[0038] Specifically, the detection mechanism 3 is connected through the arc-shaped support frame 20, the mounting ring 23, and the gear ring 25. The driving motor 11 drives the mounting ring 23 to rotate around the mounting axis. At the same time, the arc-shaped support frame 20 is provided to support the mounting ring 23 to increase the installation stability of the mounting ring 23. At the same time, a driving gear 24 is provided on the mounting ring 23 to drive the gear ring 25 to rotate inside the mounting ring 23, so that the detection mechanism 3 installed on the inner side of the gear ring 25 can obtain more consistent with the injection effect simulation detection data of the injector 50 in various complex postures.

[0039] Further, such as Figure 7 As shown, a matching frame 26 is symmetrically provided on the inner side of the gear ring 25, and the matching frame 26 is fixedly connected to the inner wall of the gear ring 25. The matching frame 26 is arranged in an arc shape, and connecting columns 40 are provided at both ends of the "U"-shaped structure composed of the detection tube 52 and the cleaning tube 41. A spherical matching block 29 is provided at the end of the connecting column 40. An arc groove 28 is provided in the matching frame 26, and the spherical matching block 29 is slidably installed between the arc groove 28.

[0040] Furthermore, the arc groove 28 is provided with support springs 27 at both ends of the spherical matching block 29 .

[0041] Specifically, the rotational freedom of the detection mechanism 3 in space is further improved by the matching frame 26 and the second spherical matching block 29 .

[0042] Furthermore, an annular groove 250 is provided at the bottom of the gear ring 25 , and a ball 251 is rotatably provided inside the mounting ring 23 . The ball 251 is embedded and rollingly mounted between the mounting ring 23 , and the ball 251 faces the groove 250 .

[0043] The working principle of the embodiment of the present invention is:

[0044] like Figure 1-7As shown, the fuel injector 50 delivers fuel from the fuel barrel through an atomizing tube 51 into a detection tube 52. Detection tube 52 is made of transparent material. A closed tube 31 is inserted into the side of detection tube 52, and the opaque closed tube 31 shields detection tube 52 from light. The fuel sprayed through the fuel injector is then colored by an atomizing coloring assembly 6. A detection light is then emitted into detection tube 52 by a light generator 32. The colored atomized fuel reduces the penetration of the detection light, weakening the intensity of the light reaching the photosensitive plate 34. The better the atomization effect of the fuel injector 50, the higher the density of the colored atomized fuel filling detection tube 52, which reduces the penetration of the detection light. The effectiveness of the fuel atomization by the fuel injector 50 can be determined based on the light intensity detected by the photosensitive plate 34. Some of the fuel remains in liquid form and adheres to the inner wall of detection tube 52 along with the coloring material. The cleaning mechanism 4 cleans detection tube 52, facilitating the detection of the atomized fuel by the fuel injector 50 in different positions. When the detection tube 52 needs to be cleaned, a flexible push rod 43 and a cleaning piston 42 are provided in the detection tube 52, and the flexible push rod 43 is driven to move by the telescopic motor 47, so that the cleaning piston 42 enters the detection tube 52 along the cleaning tube 41. The inner wall of the cleaning tube 41 is cleaned by the cleaning piston 42. When the cleaning piston 42 reaches the end of the detection tube 52, the cleaning piston 42 is cleaned by the piston cleaning assembly to prevent the cleaning piston 42 from contaminating the inner wall of the detection tube 52 again when it retreats. The surface of the cleaning piston 42 is cleaned by the rotating cleaning disc 49 and the cleaning brush 410, and the oil cleaning agent is applied to the cleaning piston 42 by the oil cleaning device provided in the cleaning brush 410, so that the oil on the cleaning piston 42 is reliably cleaned. The receiving tray 62 rotates and contacts the discharge pipe 61, allowing the color-absorbing powder to fall into the funnel-shaped blowout hole 63. The fuel is atomized by the injector 50, causing the color-absorbing material mixed with the fuel to be dispersed into the detection tube 52. The intensity of light reaching the photosensitive plate 34 is detected, and the atomization effect of the injector 50 is determined. The detection mechanism 3 is connected via the arc-shaped support frame 20, the mounting ring 23, and the gear ring 25. The drive motor 11 drives the mounting ring 23 to rotate about the mounting axis. The arc-shaped support frame 20 supports the mounting ring 23, increasing its installation stability. A drive gear 24 is provided on the mounting ring 23 to drive the gear ring 25 to rotate within the mounting ring 23. This allows the detection mechanism 3, mounted inside the gear ring 25, to obtain simulated test data that better matches the injection effect of the injector 50 in various complex postures.

[0045] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. Any reference numerals in the claims shall not be construed as limiting the claims involved.

[0046] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An aviation piston engine fuel injection performance test device, comprising a base (1), characterized in that: A spatial rotating mechanism (2) is provided on the base (1), a detecting mechanism (3) is installed in the spatial rotating mechanism (2), and the detecting mechanism (3) is connected to a cleaning mechanism (4); The detection mechanism (3) includes an oil spray assembly (5), the oil spray assembly (5) includes an atomizing pipe (51), an oil injector (50) is provided on the atomizing pipe (51), the oil injector (50) is connected to an oil barrel, the atomizing pipe (51) is connected to a detection pipe (52), the detection pipe (52) is provided with an atomizing coloring assembly (6), a fixing frame (30) is provided on the side of the detection pipe (52), the fixing frame (30) is fixedly installed on the outside of the detection pipe (52), and a sealing pipe (31) is provided at the outer end of the detection pipe (52). A connector (33) is provided on one side of the closed tube (31), and the connector (33) is connected to a light generator (32). The light generator (32) is fixedly mounted on a fixing frame (30). A photosensitive plate (34) is provided on the side of the closed tube (31) away from the connector (33). The photosensitive plate (34) is fixedly mounted on the side of the detection tube (52). A fixing block (35) is installed on the photosensitive plate (34). The fixing block (35) is fixedly connected to the fixing frame (30). The closed tube (31) is made of an opaque material.

2. The fuel injection performance testing device for an aviation piston engine according to claim 1, characterized in that: The cleaning mechanism (4) comprises an L-shaped cleaning tube (41), the cleaning tube (41) being connected to the atomizing tube (51), a fixing ring (44) being fixedly provided in the cleaning tube (41), a flexible push rod (43) being plugged into the fixing ring (44), a cleaning piston (42) being provided at the end of the flexible push rod (43), the cleaning piston (42) being mounted in conjunction with the cleaning tube (41) and the detection tube (52), and a U-shaped connection being formed between the detection tube (52) and the cleaning tube (41). "-type structure, a telescopic motor (47) is fixedly installed at one end of the cleaning tube (41) away from the cleaning piston (42), the end of the telescopic motor (47) is connected to a pushing ring (46), the pushing ring (46) is connected to the flexible push rod (43), a return spring (45) is installed in the cleaning tube (41) between the pushing ring (46) and the fixed ring (44), the return spring (45) is sleeved on the outside of the flexible push rod (43), and a piston cleaning assembly is also provided at the end of the detection tube (52).

3. The fuel injection performance testing device for an aviation piston engine according to claim 2, characterized in that: The piston cleaning assembly includes a second rotating motor (48) arranged on a fixed frame (30), the second rotating motor (48) is connected to a cleaning disk (49), cleaning brushes (410) are evenly arranged on the cleaning disk (49), and an oil cleaner is arranged in the cleaning brush (410), and the cleaning disk (49) coincides with the axis of the detection tube (52) during the rotation process.

4. The fuel injection performance testing device for an aviation piston engine according to claim 1, characterized in that: An atomizing coloring component (6) is provided between the detection tube (52) and the atomizing tube (51), and the atomizing coloring component (6) includes a storage cylinder (60) fixedly installed between the cleaning tube (41), wherein the storage cylinder (60) stores color-absorbing powder, and a discharge pipe (61) is evenly provided at the end of the storage cylinder (60), and a receiving tray (62) is rotatably installed on the fixed frame (30), and the receiving tray (62) is symmetrically arranged, and funnel-shaped blowing holes (63) are evenly provided on the receiving tray (62), and the blowing holes (63) are evenly provided. ) has an opening diameter at one end facing the fuel injector (50) that is larger than an opening diameter at one end away from the fuel injector (50); the atomizing tube (51) is fixedly connected to the detection tube (52) through the fixing frame (30); the atomizing tube (51) and the detection tube (52) are disconnected; the thickness of the receiving tray (62) is the same as the gap between the atomizing tube (51) and the detection tube (52); the edge of the receiving tray (62) is provided with a rounded corner; the receiving tray (62) is rotatably installed between the fixing frame (30) by a rotating motor (64).

5. The fuel injection performance testing device for an aviation piston engine according to claim 2, characterized in that: The spatial rotation mechanism (2) includes a symmetrically arranged arc-shaped support frame (20), the arc-shaped support frame (20) is fixedly installed on the base (1), a matching groove (21) is provided in the arc-shaped support frame (20), a mounting ring (23) is slidably provided in the matching groove (21), a spherical matching block (22) is provided at the end of the mounting ring (23), the mounting ring (23) is slidably installed between the spherical matching block (22) and the matching groove (21), a gear ring (25) is rotatably installed in the mounting ring (23), and the mounting ring (23) is provided with a spherical matching block (22) and the matching groove (21). A driving gear (24) is provided on the edge of the mounting ring (23), the driving gear (24) and the gear ring (25) are meshed with each other, the driving gear (24) is connected to the power component, the gear ring (25) is rotatably installed in the mounting ring (23), the detection mechanism (3) is connected to the inner ring of the gear ring (25), the two ends of the mounting ring (23) are rotatably connected to the mounting column (10), the mounting column (10) is fixedly connected to the base (1), and a driving motor (11) is provided on the rotation axis of the mounting ring (23).

6. The fuel injection performance testing device for an aviation piston engine according to claim 5, characterized in that: A matching frame (26) is symmetrically arranged on the inner side of the gear ring (25), and the matching frame (26) is fixedly connected to the inner wall of the gear ring (25). The matching frame (26) is arranged in an arc shape. Connecting columns (40) are arranged at both ends of the "U"-shaped structure composed of the detection tube (52) and the cleaning tube (41). The end of the connecting column (40) is provided with a second spherical matching block (29). An arc groove (28) is provided in the matching frame (26), and the second spherical matching block (29) is slidably installed between the arc groove (28).

7. The apparatus for testing fuel injection performance of an aviation piston engine according to claim 6, characterized in that: The arc groove (28) is provided with supporting springs (27) at both ends of the spherical matching block 2 (29).

8. The fuel injection performance testing device for an aviation piston engine according to claim 5, characterized in that: An annular groove (250) is provided at the bottom of the gear ring (25), and a ball (251) is rotatably provided on the inner side of the mounting ring (23). The ball (251) and the mounting ring (23) are embedded and rolled, and the ball (251) faces the groove (250).

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