Helicopter rotor test bench and test method

Abstract

The present invention relates to the field of rotor test technology, and in particular to a helicopter rotor test bench, comprising a mounting frame, wherein the mounting frame is divided into two parts, a bottom plate and a top plate, the top of the mounting frame bottom plate is rotatably connected with two groups of waterproof covers, the two groups of waterproof covers together form a closed space to wrap the top of the mounting frame bottom plate, the top of the waterproof cover is fixedly connected with a vertical baffle, the side of the waterproof cover is fixedly connected with a side baffle, and further comprises: a cooling bin, the cooling bin is fixedly connected to the top of the mounting frame bottom plate and is located inside the waterproof cover, the top of the cooling bin is fixedly connected with a steam bin, when a nozzle moves to the top of a blade, after a movable pipe is connected with a water outlet pipe, water flows to the nozzle through the connecting pipe, and the nozzle sprays water onto a rotor, simulating the working state of the rotor on a rainy day, thereby obtaining more comprehensive data of the rotor, and at the same time testing the pressure resistance of the rotor during operation.

Description

Technical Field

[0001] The present invention relates to the technical field of rotor testing, and in particular to a helicopter rotor test bench and a test method. Background Art

[0002] The flight performance of a helicopter depends largely on its rotor system. The rotor's aerodynamic characteristics, mechanical properties, dynamic stability and other parameters have a key impact on the helicopter's lift, drag, maneuverability, vibration level, etc. In the process of helicopter research and development, improvement and design of new rotors, a large number of accurate and comprehensive tests on the rotors are required.

[0003] However, existing helicopter rotor test benches test parameters such as the rotor's pitch and speed, or test different motion conditions of the rotor at different speeds. However, the specific performance and motion data of the rotor when the helicopter is driving on a rainy day is an important test direction, thereby simulating the rotation of the rotor in bad weather. Rain tests on the rotors require waterproof devices to protect the electronic equipment and motors on the test bench. Most of them are waterproofed in the form of protective covers, but the protective covers will tightly wrap the electronic equipment and motors, which makes it difficult for the heat of the electronic equipment and motors in the protective covers to diffuse and cannot be effectively dissipated, which can easily cause equipment damage over time. At the same time, rain simulation consumes a lot of water, which will cause waste of resources. Summary of the invention

[0004] The purpose of the present invention is to provide a helicopter rotor test bench and a test method. After the cooling chamber is filled with rainwater, the electronic equipment and the motor can be cooled by water cooling to solve the problem that the heat of the electronic equipment and the motor in the protective cover is difficult to diffuse and cannot be effectively dissipated, which may easily cause equipment damage over time.

[0005] To achieve the above object, a helicopter rotor test bench is provided, comprising a mounting frame, wherein the mounting frame is divided into a bottom plate and a top plate, the top of the mounting frame bottom plate is rotatably connected with two sets of waterproof covers, the two sets of waterproof covers together form a closed space to wrap the top of the mounting frame bottom plate, the top of the waterproof cover is fixedly connected with a vertical baffle, and the side of the waterproof cover is fixedly connected with a side baffle;

[0006] Also includes:

[0007] A cooling bin, the cooling bin is fixedly connected to the top of the bottom plate of the mounting frame and is located inside the waterproof cover, the cooling bin has a cooling effect on the inner cavity of the waterproof cover, the top of the cooling bin is fixedly connected to a steam bin, an air hole is provided at the connection between the steam bin and the cooling bin to connect the two inner cavities, the outer side of the cooling bin is connected to a water pipe, one end of the water pipe passes through the waterproof cover and extends to the outside of the waterproof cover, a fan is provided on one side of the waterproof cover, one side of the fan is connected to an air suction pipe, one end of the air suction pipe passes through the waterproof cover and is connected to the steam bin, the other side of the fan is connected to an exhaust pipe, one end of the exhaust pipe is connected to a condensation pipe.

[0008] As a further improvement of the technical solution, a moving block is provided on the top of the top plate of the mounting frame, and sub-plates are fixedly connected to both sides of the moving block. Two groups of limit plates are fixedly connected to the inner side of the top plate of the mounting frame, and the top of the limit plate is in contact with the bottom of the sub-plate.

[0009] As a further improvement of the present technical solution, the top of the moving block is fixedly connected to a fixed tube, the top of the fixed tube is movably connected to a movable tube, the top of the moving block and both sides of the fixed tube are fixedly connected to a first hydraulic cylinder, the telescopic end of the first hydraulic cylinder is fixedly connected to a cross plate, and the cross plate is fixedly connected to the movable tube.

[0010] As a further improvement of the technical solution, a side rod is fixedly connected to the side of the top plate of the mounting frame, one end of the side rod is fixedly connected to a water tank, and the bottom of the water tank is connected to a water outlet pipe for connecting with the movable pipe.

[0011] As a further improvement of the present technical solution, a connecting plate is fixedly connected to the bottom of the sub-plate, a disc is fixedly connected to the bottom of the connecting plate, a docking tube passes through the middle of the disc, connecting tubes are connected to both sides of the fixed tube, one end of the connecting tube is connected to the top of the docking tube, a branch pipe is connected to the bottom of the docking tube, a nozzle is connected to the end of the branch pipe, and the branch pipe is fixedly connected to the bottom of the disc.

[0012] As a further improvement of the present technical solution, a first motor is fixedly connected to the top of the mounting frame bottom plate, a rotating rod is fixedly connected to the output end of the first motor, a gearbox is arranged on the top of the rotating rod, the rotating rod is rotatably connected to the gearbox, a first turntable is rotatably connected to the top of the gearbox, a rotating shaft is rotatably connected to the surface of the rotating shaft, a second turntable is fixedly connected to the surface of the first turntable, a belt is movably connected between the surface of the second turntable and the surface of the first turntable, a wing body is fixedly connected to the top of the rotating shaft, and a paddle is fixedly connected to the top of the wing body.

[0013] As a further improvement of the technical solution, a heat absorbing plate is fixedly connected to the inner side of the cooling chamber, and a side of the heat absorbing plate away from the cooling chamber is close to the first motor.

[0014] As a further improvement of the present technical solution, the top of the condensing tube is connected to a circulation tube, one end of the circulation tube is connected to a water tank, one side of the cooling bin is connected to a dredging tube, one end of the dredging tube is connected to a collecting bin, the collecting bin is fixedly connected to the top of the mounting frame bottom plate and is located in the inner cavity of the waterproof cover, a water pump is fixedly connected to the top of the mounting frame bottom plate and on one side of the collecting bin, one side of the water pump is connected to a water suction pipe, the water suction pipe is connected to the collecting bin, the other side of the water pump is connected to a connecting pipe, one end of the connecting pipe passes through the waterproof cover and is connected to an exhaust pipe.

[0015] A second object of the present invention is to provide a test method for a helicopter rotor test bench, comprising the following steps:

[0016] S1. The first motor is started as a power source, and the rotating rod at its output end is connected to the gearbox. Through the belt drive, the second turntable linked with the first turntable and the wing body and blades fixed on the top of its rotating shaft rotate accordingly, accurately simulating the rotation state of the rotor in flight;

[0017] S2, the movable pipe is located below the water outlet pipe. At this time, the first hydraulic cylinder extends to drive the movable pipe to connect with the water outlet pipe. After the movable pipe is connected with the water outlet pipe, the water flows to the nozzle through the connecting pipe. The nozzle sprays the water onto the rotor, simulating the working state of the rotor on a rainy day;

[0018] S3. The air containing a large amount of water vapor in the steam bin is sucked out by the fan, and then condensed through the condenser to form a new water flow. When the water level is too high, the water flows into the collection bin through the dredging pipe, and finally enters the condenser through the water pump. At this time, the two water flows collected by the water pump and the fan are sent to the water tank through the circulation pipe to form a water cycle.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The helicopter rotor test bench and test method, when it is necessary to simulate rain, the movable pipe is located below the water outlet pipe. At this time, the first hydraulic cylinder extends to drive the movable pipe to connect with the water outlet pipe. After the movable pipe is connected with the water outlet pipe, the water flows to the nozzle through the connecting pipe. The nozzle sprays water onto the rotor, simulating the working state of the rotor on a rainy day, and obtaining more comprehensive data of the rotor in turn, while testing the pressure resistance of the rotor during operation.

[0021] 2. The helicopter rotor test bench and test method, the rotor is tested under rainwater, the rainwater will flow onto the waterproof cover, under the blocking effect of the vertical baffle and the side baffle, the rainwater flows into the water pipe, and then enters the cooling chamber through the water pipe. After the cooling chamber is filled with rainwater, the electronic equipment and the motor can be cooled by water cooling, and at the same time, the heat is quickly absorbed by the heat absorbing plate and transferred to the cooling chamber for cooling, so as to effectively dissipate the heat of the electronic equipment and the motor inside the waterproof cover, protect the safety of the equipment, and increase the service life of the equipment.

[0022] 3. The helicopter rotor test bench and test method: when the rainwater in the cooling chamber is evaporated by heat, it will turn into water vapor, and the water vapor will enter the steam chamber through the pores. At this time, the air containing a large amount of water vapor will be sucked out by the fan, and then condensed through the condenser to form a new water flow. At the same time, when there is too much water flow in the cooling chamber, it is easy to reach the receiving range of the cooling chamber. When the water level is too high, the water flows into the collection chamber through the dredging pipe, and finally enters the condenser through the water pump. At this time, the two water flows collected by the water pump and the fan are sent to the water tank through the circulation pipe to form a water cycle and save water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a schematic structural diagram of a first motor of the present invention;

[0025] Figure 3 is a schematic diagram of the structure of the blade of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the movable tube of the present invention;

[0027] Figure 5 It is a structural schematic diagram of the butt joint pipe of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the cooling chamber of the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the waterproof cover of the present invention;

[0030] Figure 8 It is the internal structure diagram of the waterproof cover of the present invention.

[0031] The meaning of each number in the figure is:

[0032] 1. Mounting frame; 2. First motor; 3. Rotating rod; 4. Gearbox; 5. First turntable; 6. Rotating shaft; 7. Second turntable; 8. Belt; 9. Wing body; 10. Blade; 11. Waterproof cover; 12. Vertical baffle; 13. Side baffle; 14. Moving block; 15. Sub-plate; 16. Limit plate; 17. Fixed pipe; 18. Movable pipe; 19. First hydraulic cylinder; 20. Horizontal plate; 21. Side rod; 22. Water box; 24, connecting pipe; 25, butt pipe; 26, branch pipe; 27, nozzle; 28, disc; 29, connecting plate; 30, cooling chamber; 31, heat absorbing plate; 32, water guide pipe; 33, air hole; 34, steam chamber; 35, fan; 36, suction pipe; 37, exhaust pipe; 38, condenser; 39, circulation pipe; 40, dredging pipe; 41, collecting chamber; 42, water pump; 43, suction pipe; 44, connecting pipe. DETAILED DESCRIPTION

[0033] See also Figure 1-Figure 8 As shown, the purpose of this embodiment is to provide a helicopter rotor test bench, including a mounting frame 1, the mounting frame 1 is divided into two parts, a bottom plate and a top plate, the top of the bottom plate of the mounting frame 1 is rotatably connected with two sets of waterproof covers 11, the two sets of waterproof covers 11 together form a closed space to wrap the top of the bottom plate of the mounting frame 1, the top of the waterproof cover 11 is fixedly connected with a vertical baffle 12, and the side of the waterproof cover 11 is fixedly connected with a side baffle 13;

[0034] Also includes:

[0035] A cooling bin 30 is fixedly connected to the top of the bottom plate of the mounting frame 1 and is located inside the waterproof cover 11. The cooling bin 30 cools the inner cavity of the waterproof cover 11. A steam bin 34 is fixedly connected to the top of the cooling bin 30. An air hole 33 is provided at the connection between the steam bin 34 and the cooling bin 30 to connect the two inner cavities. A water pipe 32 is connected to the outer side of the cooling bin 30. One end of the water pipe 32 passes through the waterproof cover 11 and extends to the outside of the waterproof cover 11. A fan 35 is provided on one side of the waterproof cover 11. One side of the fan 35 is connected to an air suction pipe 36. One end of the air suction pipe 36 passes through the waterproof cover 11 and is connected to the steam bin 34. The other side of the fan 35 is connected to an exhaust pipe 37. One end of the exhaust pipe 37 is connected to a condensation pipe 38.

[0036] The rotor is tested under rainwater, and the rainwater will flow onto the waterproof cover 11. Under the blocking effect of the vertical baffle 12 and the side baffle 13, the rainwater flows into the water guide pipe 32, and then enters the cooling chamber 30 through the water guide pipe 32. After the cooling chamber 30 is filled with rainwater, the electronic equipment and the motor can be cooled by water cooling. At the same time, the heat is quickly absorbed by the heat absorbing plate 31 and transferred to the cooling chamber 30 for cooling, so as to effectively dissipate the heat of the electronic equipment and the motor inside the waterproof cover 11, protect the safety of the equipment, and increase the service life of the equipment.

[0037] A first motor 2 is fixedly connected to the top of the bottom plate of the mounting frame 1, a rotating rod 3 is fixedly connected to the output end of the first motor 2, a gearbox 4 is arranged on the top of the rotating rod 3, the rotating rod 3 is rotatably connected to the gearbox 4, a first turntable 5 is rotatably connected to the top of the gearbox 4, a rotating shaft 6 is rotatably connected to the top of the bottom plate of the mounting frame 1, a second turntable 7 is fixedly connected to the surface of the rotating shaft 6, a belt 8 is movably connected between the surface of the second turntable 7 and the surface of the first turntable 5, a wing body 9 is fixedly connected to the top of the rotating shaft 6, and a blade 10 is fixedly connected to the top of the wing body 9.

[0038] A moving block 14 is provided on the top of the top plate of the mounting frame 1, and sub-plates 15 are fixedly connected to both sides of the moving block 14. Two sets of limit plates 16 are fixedly connected to the inner side of the top plate of the mounting frame 1, and the top of the limit plate 16 contacts the bottom of the sub-plate 15. A fixed tube 17 is fixedly connected to the top of the moving block 14, and a movable tube 18 is movably connected to the top of the fixed tube 17. A first hydraulic cylinder 19 is fixedly connected to the top of the moving block 14 and on both sides of the fixed tube 17, and a cross plate 20 is fixedly connected to the telescopic end of the first hydraulic cylinder 19, and the cross plate 20 is fixedly connected to the movable tube 18.

[0039] A side rod 21 is fixedly connected to the side of the top plate of the mounting frame 1 , one end of the side rod 21 is fixedly connected to a water tank 22 , and the bottom of the water tank 22 is connected to a water outlet pipe for connecting with the movable pipe 18 .

[0040] The first hydraulic cylinder 19 controls the movement of the movable tube 18 by extending and shortening. A waterproof treatment is provided between the movable tube 18 and the fixed tube 17. When the movable tube 18 moves, there will be no water leakage. Similarly, when the movable tube 18 is connected to the water outlet pipe, the sealing performance is also very good and there will be no water leakage.

[0041] When rain simulation is required, the movable pipe 18 is located below the water outlet pipe. At this time, the first hydraulic cylinder 19 extends to drive the movable pipe 18 to connect with the water outlet pipe. After the movable pipe 18 is connected with the water outlet pipe, the water flows through the connecting pipe 24 to the nozzle 27. The nozzle 27 sprays water onto the rotor, simulating the working state of the rotor on a rainy day, and obtaining more comprehensive data of the rotor in turn, while testing the pressure resistance of the rotor during operation.

[0042] A connecting plate 29 is fixedly connected to the bottom of the sub-plate 15, a disc 28 is fixedly connected to the bottom of the connecting plate 29, a docking tube 25 penetrates the middle of the disc 28, connecting tubes 24 are connected to both sides of the fixed tube 17, one end of the connecting tube 24 is connected to the top of the docking tube 25, a branch pipe 26 is connected to the bottom of the docking tube 25, a nozzle 27 is connected to the end of the branch pipe 26, and the branch pipe 26 is fixedly connected to the bottom of the disc 28.

[0043] A heat absorbing plate 31 is fixedly connected to the inner side of the cooling chamber 30 , and a side of the heat absorbing plate 31 away from the cooling chamber 30 is close to the first motor 2 .

[0044] The top of the condensing pipe 38 is connected to a circulation pipe 39, one end of the circulation pipe 39 is connected to the water tank 22, one side of the cooling chamber 30 is connected to a clearing pipe 40, one end of the clearing pipe 40 is connected to a collecting chamber 41, the collecting chamber 41 is fixedly connected to the top of the bottom plate of the mounting frame 1 and is located in the inner cavity of the waterproof cover 11, a water pump 42 is fixedly connected to the top of the bottom plate of the mounting frame 1 and on one side of the collecting chamber 41, one side of the water pump 42 is connected to a water suction pipe 43, the water suction pipe 43 is connected to the collecting chamber 41, the other side of the water pump 42 is connected to a connecting pipe 44, one end of the connecting pipe 44 passes through the waterproof cover 11 and is connected to the exhaust pipe 37.

[0045] When the rainwater in the cooling chamber 30 is evaporated by heat, it will turn into water vapor, and the water vapor will enter the steam chamber 34 through the pores 33. At this time, the air containing a large amount of water vapor will be sucked out by the fan 35, and then condensed through the condenser 38 to form a new water flow. At the same time, when there is too much water flow in the cooling chamber 30, it is easy to reach the receiving range of the cooling chamber 30. When the water level is too high, the water flows into the collection chamber 41 through the dredging pipe 40, and finally enters the condenser 38 through the water pump 42. At this time, the two water flows collected by the water pump 42 and the fan 35 are sent to the water tank 22 through the circulation pipe 39, forming a water cycle and saving water resources.

[0046] A second object of the present invention is to provide a test method for a helicopter rotor test bench, comprising the following steps:

[0047] S1, the first motor 2 is started as a power source, and the rotating rod 3 at its output end is connected to the gearbox 4, and the second rotating disk 7 linked with the first rotating disk 5 and the wing body 9 and the blade 10 fixed on the top of the rotating shaft 6 rotate accordingly through the belt 8, accurately simulating the rotation state of the rotor in flight;

[0048] S2, the movable pipe 18 is located below the water outlet pipe. At this time, the first hydraulic cylinder 19 extends to drive the movable pipe 18 to connect with the water outlet pipe. After the movable pipe 18 is connected with the water outlet pipe, the water flows through the connecting pipe 24 to the nozzle 27. The nozzle 27 sprays the water onto the rotor, simulating the working state of the rotor on a rainy day;

[0049] S3. The air containing a large amount of water vapor in the steam bin 34 is sucked out through the fan 35, and then condensed through the condenser 38 to form a new water flow. When the water level is too high, the water flows into the collection bin 41 through the dredging pipe 40, and finally enters the condenser 38 through the water pump 42. At this time, the two water flows collected by the water pump 42 and the fan 35 are sent to the water tank 22 through the circulation pipe 39 to form a water circulation.

[0050] Working principle: The first motor 2 of the bottom plate of the mounting frame 1 is started as a power source, and the rotating rod 3 at its output end is connected to the gearbox 4, which drives the first turntable 5 to rotate after the speed change, and the second turntable 7 linked with the first turntable 5 and the wing body 9 and blades 10 fixed on the top of its rotating shaft 6 rotate accordingly through the belt 8, accurately simulating the rotation state of the rotor in flight, and the speed and other parameters are coordinated and controlled by the motor and the gearbox 4;

[0051] When rain simulation is required, the movable pipe 18 is located below the water outlet pipe. At this time, the first hydraulic cylinder 19 is extended to drive the movable pipe 18 to connect with the water outlet pipe. After the movable pipe 18 is connected with the water outlet pipe, the water flows to the nozzle 27 through the connecting pipe 24. The nozzle 27 sprays the water onto the rotor, simulating the working state of the rotor on a rainy day, and obtaining more comprehensive data of the rotor in turn, while testing the pressure resistance of the rotor during operation;

[0052] When the rainwater in the cooling chamber 30 is evaporated by heat, it will turn into water vapor, and the water vapor will enter the steam chamber 34 through the pores 33. At this time, the air containing a large amount of water vapor will be sucked out by the fan 35, and then condensed through the condenser 38 to form a new water flow. At the same time, when there is too much water flow in the cooling chamber 30, it is easy to reach the receiving range of the cooling chamber 30. When the water level is too high, the water flows into the collection chamber 41 through the dredging pipe 40, and finally enters the condenser 38 through the water pump 42. At this time, the two water flows collected by the water pump 42 and the fan 35 are sent to the water tank 22 through the circulation pipe 39, forming a water cycle and saving water resources.

[0053] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A helicopter rotor test bench, comprising a mounting frame (1), wherein the mounting frame (1) is divided into two parts: a bottom plate and a top plate, and wherein: Two groups of waterproof covers (11) are rotatably connected to the top of the bottom plate of the mounting frame (1), and the two groups of waterproof covers (11) together form a closed space to wrap the top of the bottom plate of the mounting frame (1), and the top of the waterproof cover (11) is fixedly connected to a vertical baffle (12), and the side of the waterproof cover (11) is fixedly connected to a side baffle (13); The rotor is tested under rainwater. Rainwater flows onto the waterproof cover. Under the blocking effect of the vertical baffles and side baffles, the rainwater flows into the water guide pipe, and then enters the cooling chamber through the water guide pipe. After the cooling chamber is filled with rainwater, the electronic equipment and motor are cooled by water cooling. At the same time, the heat is quickly absorbed by the heat absorbing plate and transferred to the cooling chamber for cooling. It also includes: A cooling chamber (30), the cooling chamber (30) being fixedly connected to the top of the bottom plate of the mounting frame (1) and being located inside the waterproof cover (11), the cooling chamber (30) having a cooling effect on the inner cavity of the waterproof cover (11), the top of the cooling chamber (30) being fixedly connected to a steam chamber (34), a pore (33) being provided at the connection between the steam chamber (34) and the cooling chamber (30) to connect the two inner cavities, the outer side of the cooling chamber (30) being connected to a water guide pipe (32), One end of the water guide pipe (32) passes through the waterproof cover (11) and extends to the outside of the waterproof cover (11); a fan (35) is provided on one side of the waterproof cover (11); one side of the fan (35) is connected to an air suction pipe (36); one end of the air suction pipe (36) passes through the waterproof cover (11) and is connected to the steam bin (34); the other side of the fan (35) is connected to an exhaust pipe (37); one end of the exhaust pipe (37) is connected to a condenser pipe (38); The top end of the condensing pipe (38) is connected to a circulation pipe (39), one end of which is connected to a water tank (22); one side of the cooling chamber (30) is connected to a dredging pipe (40), one end of which is connected to a collecting chamber (41); the collecting chamber (41) is fixedly connected to the top of the bottom plate of the mounting frame (1) and is located in the inner cavity of the waterproof cover (11); a water pump (42) is fixedly connected to the top of the bottom plate of the mounting frame (1) and on one side of the collecting chamber (41); one side of the water pump (42) is connected to a water suction pipe (43), the water suction pipe (43) is connected to the collecting chamber (41); the other side of the water pump (42) is connected to a connecting pipe (44), one end of which passes through the waterproof cover (11) and is connected to an exhaust pipe (37).

2. The helicopter rotor test bench according to claim 1, characterized in that: A moving block (14) is arranged on the top of the top plate of the mounting frame (1), and auxiliary plates (15) are fixedly connected to both sides of the moving block (14). Two groups of limiting plates (16) are fixedly connected to the inner side of the top plate of the mounting frame (1), and the top of the limiting plate (16) contacts the bottom of the auxiliary plate (15).

3. The helicopter rotor test bench according to claim 2, characterized in that: The top of the moving block (14) is fixedly connected to a fixed tube (17), the top of the fixed tube (17) is movably connected to a movable tube (18), the top of the moving block (14) and both sides of the fixed tube (17) are fixedly connected to a first hydraulic cylinder (19), the telescopic end of the first hydraulic cylinder (19) is fixedly connected to a transverse plate (20), and the transverse plate (20) is fixedly connected to the movable tube (18).

4. The helicopter rotor test bench according to claim 3, characterized in that: A side rod (21) is fixedly connected to the side of the top plate of the mounting frame (1), one end of the side rod (21) is fixedly connected to a water tank (22), and the bottom of the water tank (22) is connected to a water outlet pipe for connecting to the movable pipe (18).

5. The helicopter rotor test bench according to claim 4, characterized in that: The bottom of the auxiliary plate (15) is fixedly connected to a connecting plate (29), the bottom of the connecting plate (29) is fixedly connected to a disk (28), a butt-joining pipe (25) penetrates the middle of the disk (28), both sides of the fixed pipe (17) are connected to connecting pipes (24), one end of the connecting pipe (24) is connected to the top of the butt-joining pipe (25), the bottom of the butt-joining pipe (25) is connected to a branch pipe (26), the end of the branch pipe (26) is connected to a nozzle (27), and the branch pipe (26) is fixedly connected to the bottom of the disk (28).

6. The helicopter rotor test bench according to claim 1, characterized in that: A first motor (2) is fixedly connected to the top of the bottom plate of the mounting frame (1); a rotating rod (3) is fixedly connected to the output end of the first motor (2); a gearbox (4) is arranged on the top of the rotating rod (3); the rotating rod (3) is rotatably connected to the gearbox (4); a first rotating disk (5) is rotatably connected to the top of the gearbox (4); a rotating shaft (6) is rotatably connected to the top of the bottom plate of the mounting frame (1); a second rotating disk (7) is fixedly connected to the surface of the rotating shaft (6); a belt (8) is movably connected between the surface of the second rotating disk (7) and the surface of the first rotating disk (5); a wing body (9) is fixedly connected to the top of the rotating shaft (6); and a paddle (10) is fixedly connected to the top of the wing body (9).

7. The helicopter rotor test bench according to claim 1, characterized in that: A heat absorbing plate (31) is fixedly connected to the inner side of the cooling chamber (30), and a side of the heat absorbing plate (31) away from the cooling chamber (30) is close to the first motor (2).

8. A test method for a helicopter rotor test bench, comprising the helicopter rotor test bench according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: S1, the first motor (2) is started as a power source, and the rotating rod (3) at the output end thereof is connected to the gearbox (4), and the second rotating disk (7) linked to the first rotating disk (5) and the wing body (9) and the blades (10) fixed on the top of the rotating shaft (6) thereof rotate accordingly, accurately simulating the rotation state of the rotor in flight; S2, the movable pipe (18) is located below the water outlet pipe, and the first hydraulic cylinder (19) is extended to drive the movable pipe (18) to communicate with the water outlet pipe. After the movable pipe (18) is connected with the water outlet pipe, the water flows through the connecting pipe (24) to the nozzle (27), and the nozzle (27) sprays the water onto the rotor, simulating the working state of the rotor on a rainy day; S3. The air containing a large amount of water vapor in the steam bin (34) is sucked out by the fan (35), and then condensed by the condenser (38) to form a new water flow. When the water level is too high, the water flows into the collection bin (41) through the dredging pipe (40), and finally enters the condenser (38) through the water pump (42). At this time, the two water flows collected by the water pump (42) and the fan (35) are sent to the water tank (22) through the circulation pipe (39), forming a water cycle.

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