CN113022887B - Rotor water tunnel test device - Google Patents
Rotor water tunnel test device Download PDFInfo
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- CN113022887B CN113022887B CN202110574584.3A CN202110574584A CN113022887B CN 113022887 B CN113022887 B CN 113022887B CN 202110574584 A CN202110574584 A CN 202110574584A CN 113022887 B CN113022887 B CN 113022887B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
Abstract
The invention discloses a rotor water tunnel test device, which comprises: the rotor-type dyeing machine comprises a motor assembly, a liquid storage assembly, a power transmission assembly, a dyeing liquid transmission assembly and a rotor assembly, wherein a torque output end of the motor assembly is connected with a torque input end of the rotor assembly through the power transmission assembly, and a liquid outlet end of the liquid storage assembly is communicated with a liquid inlet end of the rotor assembly through the dyeing liquid transmission assembly; according to the invention, the power transmission assembly is arranged, so that the plane of the paddle disc and the angle of water flow can be conveniently changed, and the forward flight state and the vertical flight state are considered; through setting up dyeing liquor transmission assembly for the dyeing liquor can flow in rotatory paddle, makes the dyeing liquor can flow at the paddle point portion through setting up the rotor subassembly.
Description
Technical Field
The invention relates to the field of dynamic tests, in particular to a rotor wing water tunnel test device.
Background
The rotor is the main lifting surface and the control surface of the helicopter, and tip vortex overflowing from the tip of the rotor plays a main role in the induced speed field of the rotor. The tip vortex of the rotor will be very close to the blade and will move away from the blade at a slower speed than the fixed wing tip vortex. The location, shape and strength of the rotor blade tip vortex has a significant impact on rotor performance, blade loading, vibration levels and rotor noise, among other things.
The nature of the rotor blade tip vortex is three-dimensional and unusual, and compared with 2-dimensional plane flow field measurement means such as PIV, sheet light and the like, the water tunnel test can display the three-dimensional track of the rotor blade tip vortex and can visually and accurately measure the time-space evolution characteristic of the three-dimensional track of the rotor blade tip vortex. Therefore, the research and establishment of the test method for displaying the rotor trail water holes has important theoretical and practical values.
At present, the paddle rotating plane of the domestic helicopter rotor water tunnel test device is parallel to the water flow direction, only the test of lateral incoming flow can be carried out, and the mounting angle of the paddle is fixed, so that the forward flight state and the vertical flight state cannot be tested simultaneously.
Disclosure of Invention
The invention aims to solve the problem that only a test of lateral inflow can be carried out, and aims to provide a rotor wing water tunnel test device which solves the problem that two flight states of a helicopter cannot be simulated simultaneously.
A rotor water tunnel test device comprising: motor element, stock solution subassembly, power transmission subassembly, dyeing liquor transmission subassembly and rotor subassembly, motor element's torque output passes through power transmission subassembly with the torque input of rotor subassembly is connected, the play liquid end of stock solution subassembly passes through dyeing liquor transmission subassembly with the feed liquor end intercommunication of rotor subassembly.
The power transmission assembly comprises a linear power transmission assembly and a turning power transmission assembly, the torque input end of the linear power transmission assembly is fixedly connected with the torque output end of the motor assembly, the torque output end of the linear power transmission assembly is fixedly connected with the torque input end of the turning power transmission assembly, and the torque output end of the turning power transmission assembly is fixedly connected with the torque input end of the rotor assembly.
The axis of motor element with the axis of rotor subassembly is crossing.
Specifically, the turning power transmission assembly comprises a driving bevel gear, a driven bevel gear and a turning gear box, wherein the driving bevel gear and the driven bevel gear are arranged in the turning gear box and are rotatably connected with the turning gear box, the torque input end of the driving bevel gear is fixedly connected with the torque output end of the linear power transmission assembly, the conical surface of the driving bevel gear is meshed with the conical surface of the driven bevel gear, and the torque output end of the driven bevel gear is the torque output end of the turning power transmission assembly.
Preferably, an included angle between a central axis of the driving bevel gear and a central axis of the driven bevel gear is equal to an included angle between a central axis of the motor assembly and a central axis of the rotor assembly, and a transmission ratio of the driving bevel gear to the driven bevel gear is 1: 1.
Preferably, the linear power transmission assembly comprises a plurality of straight shafts which are sequentially connected in series, and two adjacent straight shafts are fixedly connected through a coupler.
Specifically, the dyeing liquid transmission assembly comprises a front section transmission pipeline, a sliding ring and a rear section transmission pipeline, a torque output end of the turning power transmission assembly is connected with a torque input end of the rotor assembly through the sliding ring, a liquid outlet end of the liquid storage assembly is communicated with a liquid inlet end of the sliding ring through the front section transmission pipeline, and a liquid outlet end of the sliding ring is communicated with a liquid inlet end of the rotor assembly through the rear section transmission pipeline.
Specifically, the slip ring comprises a slip ring sleeve and a slip ring shaft, the slip ring shaft is coaxially arranged in the slip ring sleeve, the outer side surface of the slip ring shaft is connected with the inner side surface of the slip ring sleeve in a dynamic sealing manner, the slip ring sleeve is fixedly connected with the power output assembly, the power input end of the slip ring shaft is fixedly connected with the torque output end of the turning power transmission assembly, and the power output end of the slip ring shaft is fixedly connected with the torque input end of the rotor assembly.
The inner side surface of the sliding ring sleeve is provided with an annular cavity, the outer side surface of the sliding ring sleeve is provided with a liquid inlet communicated with the annular cavity, and the liquid inlet of the sliding ring sleeve is communicated with the front section transmission pipeline.
The inner part of the slip ring shaft is provided with an axial cylindrical cavity, the outer side surface of the slip ring shaft is provided with a liquid inlet hole and a liquid outlet hole, the first end of the cylindrical cavity is communicated with the annular cavity through the liquid inlet hole, and the second end of the cylindrical cavity is communicated with the rear-section transmission pipeline through the liquid outlet hole.
Preferably, the length of the sliding ring sleeve is smaller than that of the sliding ring shaft, two ends of the sliding ring sleeve are rotatably connected with the sliding ring shaft through thrust ball bearings, and a liquid outlet hole of the sliding ring shaft is formed between a power output end of the sliding ring shaft and one end face of the sliding ring sleeve.
Specifically, the rotor subassembly includes thick liquid hub and paddle, the paddle the inner with the periphery fixed connection of thick liquid hub, the terminal surface of thick liquid hub with the power take off end fixed connection of slip ring axle, the feed liquor end of paddle with back end transmission line intercommunication.
Specifically, the paddle includes paddle and lower paddle, the medial surface of last paddle with the medial surface laminating of paddle down.
The upper blade comprises an upper connecting handle and an upper blade, the outer end of the upper connecting handle is fixedly connected with the inner end of the upper blade, the inner side of the upper blade is provided with a radial upper main pipe, the inner side of the upper blade is provided with a plurality of vertical upper auxiliary pipes perpendicular to the upper main pipe, one end of each upper auxiliary pipe is communicated with the upper main pipe, the other end of each upper auxiliary pipe is communicated with the end edge of the upper blade, the inner side of the upper blade is further provided with a plurality of parallel upper auxiliary pipes parallel to the upper main pipe, one end of each parallel upper auxiliary pipe is communicated with the vertical upper auxiliary pipe positioned on the outer side, and the other end of each parallel upper auxiliary pipe is communicated with the outer end face of the upper blade.
The lower blade comprises a lower connecting handle and a lower blade, the outer end of the lower connecting handle is fixedly connected with the inner end of the lower blade, a radial lower main pipe is arranged on the inner side of the lower blade, a plurality of vertical lower auxiliary pipes perpendicular to the lower main pipe are arranged on the inner side of the lower blade, one end of each lower auxiliary pipe is communicated with the lower main pipe, the other end of each lower auxiliary pipe is communicated with the end edge of the lower blade, a plurality of parallel lower auxiliary pipes parallel to the lower main pipe are further arranged on the inner side of the lower blade, one end of each parallel lower auxiliary pipe is communicated with the vertical lower auxiliary pipe positioned on the outer side, and the other end of each parallel lower auxiliary pipe is communicated with the outer end face of the lower blade.
Go up be responsible for with be responsible for down and correspond the setting, and the concatenation is circular recess, go up the auxiliary pipe perpendicularly with the auxiliary pipe corresponds the setting under perpendicular, and splices for circular recess, go up the parallel auxiliary pipe with the parallel lower auxiliary pipe corresponds the setting, and splices for circular recess.
Specifically, the periphery of thick liquid hub is provided with rectangle mounting groove and fork ear, the rectangle mounting groove with be provided with the contained angle between the terminal surface of thick liquid hub, the fork ear sets up the side of rectangle mounting groove, go up the engaging handle with the rectangular connection handle of engaging handle concatenation inserts down extremely in the rectangle mounting groove, the outer end of rectangular connection handle with the fork ear all sets up the through-hole, just the rectangular connection handle with the fork ear passes through bolt fixed connection.
Compared with the prior art, the invention is convenient for changing the plane of the paddle disk and the angle of water flow by arranging the power transmission assembly, and simultaneously considers the forward flight state and the vertical flight state. Through setting up dyeing liquor transmission assembly for the dyeing liquor can flow in rotatory paddle, makes the dyeing liquor can flow at the paddle point portion through setting up the rotor subassembly.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of a rotor water tunnel test device according to the invention.
Fig. 2 is a schematic view of a slip ring according to the present invention.
Fig. 3 shows a schematic view of the structure of an upper blade according to the invention.
FIG. 4 is a side view of a hub according to the present invention.
FIG. 5 is a top view of a hub according to the present invention.
Reference numerals: 1-motor component, 2-straight shaft, 3-coupler, 4-driving bevel gear, 5-driven bevel gear, 6-slip ring, 61-slip ring sleeve, 62-slip ring shaft, 63-annular cavity, 64-liquid inlet, 65-cylindrical cavity, 66-liquid inlet, 67-liquid outlet, 68-thrust ball bearing, 7-propeller hub, 71-rectangular mounting groove, 72-fork lug, 73-through hole, 8-blade, 81-upper connecting handle, 82-upper blade, 83-upper main pipe, 84-vertical upper auxiliary pipe and 85-parallel upper auxiliary pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the invention.
It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
In the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
A rotor water tunnel test device comprising: motor element 1, stock solution subassembly, power transmission subassembly, dyeing liquor transmission subassembly and rotor subassembly, motor element 1's torque output passes through the power transmission subassembly and is connected with the torque input of rotor subassembly, and the play liquid end of stock solution subassembly passes through the feed liquor end intercommunication of dyeing liquor transmission subassembly and rotor subassembly.
Because the experiment is carried out in the water hole, the rotor wake needs to be observed with the help of the colouring of dyeing liquor to solve the problem that dyeing liquor gets into the rotor device in the rotation, to this problem, designed dyeing liquor transmission assembly.
Rotor subassembly needs simulation helicopter rotor to fly state and vertical flight state in the front to paddle 8 need set up dyeing liquor transmission tank, makes the dyeing liquor smoothly follow paddle 8 (a plurality of paddles 8 constitute the rotor) and flow out of the point portion.
The specific structures of the motor assembly 1 and the liquid storage assembly are not particularly required, as long as the functions of supplying power and dyeing liquid can be achieved, and an embodiment of the assembly is provided below for reference.
The complete set of motor assembly 1 comprises: the device comprises a motor, a planetary reduction box, a driver, a direct-current switching power supply, a serial port converter and a rotating speed display.
Selecting a type of the motor: the motor is characterized by high rotating speed and low torque, and the requirement of the test on the rotor is low rotating speed and high torque, so the selected motor type is a direct-current brushless planetary speed reducing motor.
A planetary reduction gearbox: in order to ensure that the rotating speed of the device is not too high, the rotating speed output by the motor needs to be reduced by the planetary reduction gearbox, and the reduction ratio of the planetary reduction gearbox selected in the test is 1: 10. The planetary reduction box is tightly combined with the gear box shell by an inner gear ring, the center of the ring gear is provided with a sun gear driven by external power, a group of planetary gear sets formed by three gears in an equal division way on the tray is arranged between the ring gear and the sun gear, and the group of planetary gears are supported in the middle by the power output shaft, the inner gear ring and the sun gear. When the power on the input side drives the sun gear, the planetary reducer can drive the planetary gear to rotate and revolve along the center along the track of the inner gear ring, and the rotation of the planetary gear drives the power output shaft connected to the tray to output power.
A driver: the driver is composed of an integrated circuit and a power electronic device and is used for receiving signals given by a computer, coding the signals and then sending the signals to the motor, so that the aim of controlling the motor to start, stop and brake is achieved. Meanwhile, the output rotating speed and the rotating direction of the motor can be changed.
A direct-current switching power supply: the function of the DC switching power supply is to convert the common 220v AC power into 24v DC power and then supply power to the driver and the motor.
A serial port converter: the serial converter used in the test converts the TCP data output by the computer into 485 data.
A rotating speed display instrument: the rotating speed display instrument is connected out from the controller and displays the output rotating speed of the motor in real time through the LED display screen.
The structure of stock solution subassembly can be very simple, adopt a plurality of transfusion bottle promptly can, the power of dyeing liquor transmission comes from gravitational potential energy, changes the velocity of flow of dyeing liquor through changing the transfusion bottle height to guarantee that the dyeing liquor is from the tip outflow of paddle 8 rather than the blowout. In order to achieve the purpose that the dyeing liquid can enter the rotating blade 8, and simultaneously, because the adopted dyeing liquid is red-blue ink, the dyeing liquid has less impurities and is not easy to block a pipeline.
However, also can adopt comparatively stable stock solution subassembly, including stock solution bottle, water pump and pressure sensor etc. promptly, pump out the dyeing liquid in the stock solution bottle through the water pump to exert certain pressure to it, detect hydraulic condition through pressure sensor, monitor the velocity of flow of dyeing liquid in proper order, flow rather than the blowout from 8 tip of paddle in order to guarantee the dyeing liquid.
The specific structure is not required to be restricted as long as the dyeing liquid can be provided and the stable outflow can be kept.
The power transmission assembly comprises a linear power transmission assembly and a turning power transmission assembly, the torque input end of the linear power transmission assembly is fixedly connected with the torque output end of the motor assembly 1, the torque output end of the linear power transmission assembly is fixedly connected with the torque input end of the turning power transmission assembly, and the torque output end of the turning power transmission assembly is fixedly connected with the torque input end of the rotor wing assembly.
The axis of motor element 1 intersects the axis of rotor subassembly.
The motor assembly 1 drives the rotor to rotate, but the rotor rotates below the water surface, and the motor is generally not wet, so the motor must be arranged above the water surface, and the power of the motor needs to be transmitted into the water through the power transmission assembly.
Wherein the linear power transmission assembly is used for transmitting the power of the motor from the horizontal to the underwater.
The direction-changing power transmission assembly is used for changing the transmission direction of power, so that the angle between the plane of the pulp disk and the water flow is adjustable.
The central axis of the motor assembly 1 intersects the central axis of the rotor assembly through the direction-changing power transmission assembly, and in this embodiment, the included angle is set to 90 °.
Of course, the angle of the included angle can be changed according to specific conditions, so that the included angle can meet more test requirements.
The turning power transmission assembly comprises a driving bevel gear 4, a driven bevel gear 5 and a turning gear box, wherein the driving bevel gear 4 and the driven bevel gear 5 are both arranged in the turning gear box, the driving bevel gear 4 and the driven bevel gear 5 are both rotatably connected with the turning gear box, the torque input end of the driving bevel gear 4 is fixedly connected with the torque output end of the linear power transmission assembly, the conical surface of the driving bevel gear 4 is meshed with the conical surface of the driven bevel gear 5 in a toothed manner, and the torque output end of the driven bevel gear 5 is the torque output end of the turning power transmission assembly.
Through setting up two intermeshing's bevel gear, realize power steering's purpose, simultaneously, in order to reduce bevel gear and to rivers production influence, can set up drive bevel gear 4 and driven bevel gear 5 in change gear box.
Through holes are formed in two surfaces of the phase change gear box, so that transmission shafts of the two bevel gears can extend out, and the inside of the change gear box is in a dry state through a connection mode of dynamic sealing, so that the bevel gears are prevented from being corroded by water.
The change speed gearbox is not shown in the figure.
An included angle between the central axis of the driving bevel gear 4 and the central axis of the driven bevel gear 5 is equal to an included angle between the central axis of the motor component 1 and the central axis of the rotor wing component, and the transmission ratio of the driving bevel gear 4 to the driven bevel gear 5 is 1: 1.
The included angle between the transmission shafts of the driving bevel gear 4 and the driven bevel gear 5 is 90 degrees, and similarly, the included angle can be adjusted according to the test requirements.
The transmission ratio of the driving bevel gear 4 to the driven bevel gear 5 is set to be 1:1, so that the size of the bevel gear can be reduced as much as possible, meanwhile, the size of the change gear box can be reduced, the purpose of reducing interference to water flow can be achieved, and the test accuracy is improved.
The linear power transmission assembly comprises a plurality of straight shafts 2 which are sequentially connected in series, and the two adjacent straight shafts 2 are fixedly connected through a coupler 3.
The power of motor element 1 output is transmitted to under water by sharp power transmission subassembly, because whole vertical direction transmission distance is longer, for reducing the processing degree of difficulty, set sharp power transmission subassembly into the mode of a plurality of straight axles 2 to establish ties straight axle 2 through shaft coupling 3, the straight axle 2 of the top is connected with motor element 1's torque output end, straight axle 2 of the bottom is with power transmission to diversion power transmission subassembly, after turning to via a pair of bevel gear, output to sliding ring 6 and paddle 8.
The dyeing liquid transmission assembly comprises a front section transmission pipeline, a sliding ring 6 and a rear section transmission pipeline, the torque output end of the turning power transmission assembly is connected with the torque input end of the rotor assembly through the sliding ring 6, the liquid outlet end of the liquid storage assembly is communicated with the liquid inlet end of the sliding ring 6 through the front section transmission pipeline, and the liquid outlet end of the sliding ring 6 is communicated with the liquid inlet end of the rotor assembly through the rear section transmission pipeline.
Because the experiment is carried out in the water hole, the rotor wake need be observed with the help of the colouring of dyeing liquor to the problem of dyeing liquor entering rotary rotor device is solved, rationally transmit the dyeing liquor to paddle 8 through dyeing liquor transmission subassembly.
Because the paddle 8 is in a rotating state when working, if the transmission pipeline of the dyeing liquid is not designed, the problem that the transmission pipeline is wound on the paddle 8 can occur, and the slip ring 6 is used for realizing the function.
The anterior segment transmission line communicates sliding ring 6 and stock solution subassembly, with the leading-in to sliding ring 6 of dyeing liquor in, the anterior segment transmission line can be multiple structure as long as can transmit the dyeing liquor can.
Can be a water pipe, and directly communicates the liquid storage component with the slip ring 6.
The water tank can be also used, the water tank is carved on the shells of the linear power transmission component and the turning power transmission component, and the water is guided directly through the shells.
Back end transmission management communicates sliding ring 6 and paddle 8, with dyeing liquor leading-in to paddle 8 in, back end transmission line also can be multiple structure, but is the hose best, because in actual test, need often change paddle 8, sets up to the realization dismouting that the hose can be better.
The slip ring 6 comprises a slip ring sleeve 61 and a slip ring shaft 62, the slip ring shaft 62 is coaxially arranged in the slip ring sleeve 61, the outer side surface of the slip ring shaft 62 is connected with the inner side surface of the slip ring sleeve 61 in a dynamic sealing mode, the slip ring sleeve 61 is fixedly connected with the power output assembly, the power input end of the slip ring shaft 62 is fixedly connected with the torque output end of the direction-changing power transmission assembly, and the power output end of the slip ring shaft 62 is fixedly connected with the torque input end of the rotor assembly.
The slip ring sleeve 61 is fixed and is connected with the front-section conveying pipeline, so that the problem of winding of the front-section conveying pipeline is avoided.
And the sliding ring sleeve 61 is connected with the sliding ring shaft 62 in a dynamic sealing manner, so that the dyeing liquid can circulate inside, and the dyeing liquid is prevented from leaking.
An annular cavity 63 is formed in the inner side face of the sliding ring sleeve 61, a liquid inlet 64 communicated with the annular cavity 63 is formed in the outer side face of the sliding ring sleeve 61, and the liquid inlet 64 of the sliding ring sleeve 61 is communicated with the front section conveying pipeline.
The inside of slip ring axle 62 is provided with axial cylinder cavity 65, and the lateral surface of slip ring axle 62 is provided with feed liquor hole 66 and goes out liquid hole 67, and the first end of cylinder cavity 65 passes through feed liquor hole 66 and annular chamber 63 intercommunication, and the second end of cylinder cavity 65 passes through out liquid hole 67 and back end transmission line intercommunication.
As shown in the figure, the dyeing liquid enters the annular cavity 63 through the liquid inlet 64 of the slip ring sleeve 61, is stored in the annular cavity 63, flows into the liquid inlet hole 66 on the slip ring shaft 62, flows into the liquid outlet hole 67 in the circular cavity, and is communicated with the rear-section conveying pipeline, so that the dyeing liquid is conveyed.
The annular cavity 63 and the liquid inlet hole 66 are located on the same circular section, so that the slip ring shaft 62 is always communicated with the annular cavity 63 when rotating, and the stable circulation of the dyeing liquid can be realized.
The length of the sliding ring sleeve 61 is smaller than that of the sliding ring shaft 62, two ends of the sliding ring sleeve 61 are rotatably connected with the sliding ring shaft 62 through thrust ball bearings 68, and the liquid outlet hole 67 of the sliding ring shaft 62 is arranged between the power output end of the sliding ring shaft 62 and one end face of the sliding ring sleeve 61.
The size is limited here in order to arrange the liquid outlet hole 67 of the slip ring shaft 62 outside for the convenience of connection with the rear stage transfer pipe, while the rear stage transfer pipe does not interfere with the slip ring 61 when rotated.
The rotor subassembly includes thick liquid hub 7 and paddle 8, and the periphery fixed connection of the inner of paddle 8 and thick liquid hub 7, the terminal surface of thick liquid hub 7 and the power take off end fixed connection of sliding ring axle 62, the feed liquor end and the back end transmission line intercommunication of paddle 8.
In this embodiment, the blade 8 is an airfoil shape of naca0015, and the designed span length is 150mm and the chord length is 37.5 mm. The blades 8 cannot be oversized in view of the rigidity of the blades 8.
The paddle 8 comprises an upper paddle and a lower paddle, and the inner side surface of the upper paddle is attached to the inner side surface of the lower paddle.
For processing convenience, the paddle 8 is divided into an upper paddle and a lower paddle, after the upper paddle and the lower paddle are processed respectively, connection is carried out through screws or other connection modes, and finally the joints are sealed through adhesive tapes to avoid liquid leakage.
The upper blade comprises an upper connecting handle 81 and an upper blade 82, the outer end of the upper connecting handle 81 is fixedly connected with the inner end of the upper blade 82, the inner side of the upper blade 82 is provided with a radial upper main pipe 83, the inner side of the upper blade 82 is provided with a plurality of vertical upper auxiliary pipes 84 perpendicular to the upper main pipe 83, one ends of the upper auxiliary pipes are communicated with the upper main pipe 83, the other ends of the upper auxiliary pipes are communicated with the end edge of the upper blade 82, the inner side of the upper blade 82 is further provided with a plurality of parallel upper auxiliary pipes 85 parallel to the upper main pipe 83, one ends of the parallel upper auxiliary pipes 85 are communicated with the vertical upper auxiliary pipes 84 positioned on the outer side, and the other ends of the parallel upper auxiliary pipes 85 are communicated with the outer end face of the upper blade 82.
The lower blade comprises a lower connecting handle and a lower blade, the outer end of the lower connecting handle is fixedly connected with the inner end of the lower blade, the inner side surface of the lower blade is provided with a radial lower main pipe, the inner side surface of the lower blade is provided with a plurality of vertical lower auxiliary pipes perpendicular to the lower main pipe, one end of each lower auxiliary pipe is communicated with the lower main pipe, the other end of each lower auxiliary pipe is communicated with the end edge of the lower blade, the inner side surface of the lower blade is further provided with a plurality of parallel lower auxiliary pipes parallel to the lower main pipe, one end of each parallel lower auxiliary pipe is communicated with the vertical lower auxiliary pipe located on the outer side, and the other end of each parallel lower auxiliary pipe is communicated with the outer end face of the lower blade.
The upper paddle and the lower paddle are similar in structure and are symmetrically arranged along the inner side face of the upper paddle and the lower paddle, and the work purpose can be completed only by the cooperation of the upper paddle and the lower paddle, so that the part names of the upper paddle and the lower paddle are simply described.
One end of the upper main pipe 83 communicates with the rear stage transmission line, and an opening of the upper main pipe 83 is provided at the inner end of the upper blade 82 in order to reduce the size of the rear stage transmission line and the interference with the test.
At the same time, the upper main tube 83 is positioned near one end of the upper blade 82, and the vertical upper sub-tube 84 and the parallel upper sub-tube 85 are provided, so that the dyeing liquid can flow out from the other end and the outer end surface of the upper blade 82.
Meanwhile, in actual use, the part of the blade 8 which does not need to flow out of the dyeing solution can be sealed by an adhesive tape, so that the dyeing solution can flow out of the designated position.
The upper main pipe 83 and the lower main pipe are correspondingly arranged and are spliced into a circular groove, the vertical upper auxiliary pipe 84 and the vertical lower auxiliary pipe are correspondingly arranged and are spliced into a circular groove, the parallel upper auxiliary pipe 85 and the parallel lower auxiliary pipe are correspondingly arranged and are spliced into a circular groove.
The internal grooves of the blades 8 are all circular grooves so as to reduce the flow resistance of liquid. The diameter of the main pipe is 2.5mm, and the diameter of the auxiliary pipe is 1 mm. Further, the portion where the staining solution does not need to flow out can be sealed with a tape, and the staining solution can be allowed to flow out from the predetermined position.
The periphery of thick liquid hub 7 is provided with rectangle mounting groove 71 and fork ear 72, is provided with the contained angle between the terminal surface of rectangle mounting groove 71 and thick liquid hub 7, and fork ear 72 sets up the side at rectangle mounting groove 71, goes up the rectangle connecting handle 81 and inserts to rectangle mounting groove 71 with the rectangle connecting handle of lower connecting handle concatenation in, the outer end of rectangle connecting handle and fork ear 72 all set up through-hole 73, and rectangle connecting handle and fork ear 72 pass through bolt fixed connection.
The hub is designed to be circular to reduce drag and the effect on water flow as the rotor rotates. The lower part of the propeller hub is provided with a circular groove which is matched with a protrusion at the rotating end of the sliding ring 6, and then the circular groove is fixedly connected with the rotating end of the sliding ring 6 through 4 uniformly arranged circular through holes.
According to the test requirement, the propeller hub requires that the attack angle of the blades 8 can be changed. A series of hubs with different angles of the fork ears 72 are designed.
Each different hub corresponds to a rotor angle of attack (i.e., the angle between the rectangular mounting slot 71 and the end face of the hub 7). Two square grooves with angles are formed in the two sides of the hub, and two sets of fork lugs 72 extend outwards from the hub to increase the contact area with the blades 8 and facilitate the fixation of the blades 8.
By replacing the hub, a change in the setting angle of the blades 8 can be achieved.
The forward flight state: when the helicopter is in a forward flight state, the rotation plane of the rotor wing is parallel to the incoming flow plane. Therefore, when the rotor forward flight test is carried out in the water tunnel, the plane of the paddle disk of the rotor device is parallel to the water flow direction, and the plane of the paddle disk of the rotor is in the region where the flow speed is most stable in the water tunnel test section.
The vertical flight state: in the helicopter in a vertical flight state, the rotating plane of the rotor wing is vertical to the incoming flow plane. Therefore, when the rotor wing vertical flight test is carried out in the water tunnel, the plane of the paddle disk of the rotor wing device is perpendicular to the water flow direction, and the plane of the paddle disk of the rotor wing is positioned at the center of stable flow rate of the water tunnel test section.
After the rotor wing device is put into the water tunnel, for reducing the influence of connecting rod to the regional rivers of rotor wing wake, the event is arranged the connecting rod in rivers upper reaches, and rivers low reaches are arranged in to rotor wing oar dish plane.
This device compromises two kinds of test states, sets up test device overall structure form into "L" type. During testing, the relative angle between the water flow direction and the plane of the paddle disk is changed by adjusting the mounting direction, so that the test state can be switched between forward flight and vertical flight conveniently.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.
Claims (8)
1. The utility model provides a rotor water tunnel test device which characterized in that includes: the rotor-type dyeing machine comprises a motor assembly, a liquid storage assembly, a power transmission assembly, a dyeing liquid transmission assembly and a rotor assembly, wherein a torque output end of the motor assembly is connected with a torque input end of the rotor assembly through the power transmission assembly, and a liquid outlet end of the liquid storage assembly is communicated with a liquid inlet end of the rotor assembly through the dyeing liquid transmission assembly;
the power transmission assembly comprises a linear power transmission assembly and a turning power transmission assembly, the torque input end of the linear power transmission assembly is fixedly connected with the torque output end of the motor assembly, the torque output end of the linear power transmission assembly is fixedly connected with the torque input end of the turning power transmission assembly, and the torque output end of the turning power transmission assembly is fixedly connected with the torque input end of the rotor wing assembly;
the central axis of the motor assembly is intersected with the central axis of the rotor wing assembly;
the dyeing liquid transmission assembly comprises a front section transmission pipeline, a sliding ring and a rear section transmission pipeline, the torque output end of the turning power transmission assembly is connected with the torque input end of the rotor wing assembly through the sliding ring, the liquid outlet end of the liquid storage assembly is communicated with the liquid inlet end of the sliding ring through the front section transmission pipeline, and the liquid outlet end of the sliding ring is communicated with the liquid inlet end of the rotor wing assembly through the rear section transmission pipeline;
the slip ring comprises a slip ring sleeve and a slip ring shaft, the slip ring shaft is coaxially arranged in the slip ring sleeve, the outer side surface of the slip ring shaft is in dynamic sealing connection with the inner side surface of the slip ring sleeve, the slip ring sleeve is fixedly connected with the power output assembly, the power input end of the slip ring shaft is fixedly connected with the torque output end of the direction-changing power transmission assembly, and the power output end of the slip ring shaft is fixedly connected with the torque input end of the rotor wing assembly;
an annular cavity is formed in the inner side face of the sliding ring sleeve, a liquid inlet communicated with the annular cavity is formed in the outer side face of the sliding ring sleeve, and the liquid inlet of the sliding ring sleeve is communicated with the front-section transmission pipeline;
the inner part of the slip ring shaft is provided with an axial cylindrical cavity, the outer side surface of the slip ring shaft is provided with a liquid inlet hole and a liquid outlet hole, the first end of the cylindrical cavity is communicated with the annular cavity through the liquid inlet hole, and the second end of the cylindrical cavity is communicated with the rear-section transmission pipeline through the liquid outlet hole.
2. The rotor water tunnel test device according to claim 1, wherein the direction-changing power transmission assembly comprises a driving bevel gear, a driven bevel gear and a direction-changing gear box, the driving bevel gear and the driven bevel gear are both arranged in the direction-changing gear box, the driving bevel gear and the driven bevel gear are both rotatably connected with the direction-changing gear box, a torque input end of the driving bevel gear is fixedly connected with a torque output end of the linear power transmission assembly, a conical surface of the driving bevel gear is meshed with a conical surface of the driven bevel gear in a toothed manner, and a torque output end of the driven bevel gear is a torque output end of the direction-changing power transmission assembly.
3. The rotor wing water tunnel test device according to claim 2, wherein an included angle between a central axis of the driving bevel gear and a central axis of the driven bevel gear is equal to an included angle between a central axis of the motor assembly and a central axis of the rotor wing assembly, and a transmission ratio of the driving bevel gear to the driven bevel gear is 1: 1.
4. The rotor water tunnel test device according to claim 1, wherein the linear power transmission assembly comprises a plurality of straight shafts which are sequentially connected in series, and two adjacent straight shafts are fixedly connected through a coupler.
5. The rotor water tunnel test device according to claim 1, wherein the length of the slip ring sleeve is smaller than that of the slip ring shaft, two ends of the slip ring sleeve are rotatably connected with the slip ring shaft through thrust ball bearings, and the liquid outlet hole of the slip ring shaft is arranged between the power output end of the slip ring shaft and one end face of the slip ring sleeve.
6. A rotor water tunnel test device according to claim 5, wherein the rotor assembly comprises a hub and blades, the inner ends of the blades are fixedly connected with the circumferential surface of the hub, the end surfaces of the hub are fixedly connected with the power output end of the slip ring shaft, and the liquid inlet ends of the blades are communicated with the rear section transmission pipeline.
7. The rotor water tunnel test device according to claim 6, wherein the blades comprise an upper blade and a lower blade, and the inner side surface of the upper blade is attached to the inner side surface of the lower blade;
the upper blade comprises an upper connecting handle and an upper blade, the outer end of the upper connecting handle is fixedly connected with the inner end of the upper blade, the inner side surface of the upper blade is provided with a radial upper main pipe, the inner side surface of the upper blade is provided with a plurality of vertical upper auxiliary pipes perpendicular to the upper main pipe, one ends of the upper auxiliary pipes are communicated with the upper main pipe, the other ends of the upper auxiliary pipes are communicated with the end edge of the upper blade, the inner side surface of the upper blade is also provided with a plurality of parallel upper auxiliary pipes parallel to the upper main pipe, one ends of the parallel upper auxiliary pipes are communicated with the vertical upper auxiliary pipes positioned on the outer side, and the other ends of the parallel upper auxiliary pipes are communicated with the outer end surface of the upper blade;
the lower blade comprises a lower connecting handle and a lower blade, the outer end of the lower connecting handle is fixedly connected with the inner end of the lower blade, the inner side surface of the lower blade is provided with a radial lower main pipe, the inner side surface of the lower blade is provided with a plurality of vertical lower auxiliary pipes perpendicular to the lower main pipe, one end of each lower auxiliary pipe is communicated with the lower main pipe, the other end of each lower auxiliary pipe is communicated with the end edge of the lower blade, the inner side surface of the lower blade is also provided with a plurality of parallel lower auxiliary pipes parallel to the lower main pipe, one end of each parallel lower auxiliary pipe is communicated with the vertical lower auxiliary pipe positioned on the outer side, and the other end of each parallel lower auxiliary pipe is communicated with the outer end surface of the lower blade;
go up be responsible for with be responsible for down and correspond the setting, and the concatenation is circular recess, go up the auxiliary pipe perpendicularly with the auxiliary pipe corresponds the setting under perpendicular, and splices for circular recess, go up the parallel auxiliary pipe with the parallel lower auxiliary pipe corresponds the setting, and splices for circular recess.
8. A rotor water tunnel test device according to claim 7, characterized in that the circumference of thick liquid hub is provided with rectangle mounting groove and fork ear, be provided with the contained angle between the terminal surface of rectangle mounting groove with thick liquid hub, the fork ear sets up the side of rectangle mounting groove, go up the connection handle with the rectangle connection handle of lower connection handle concatenation inserts to in the rectangle mounting groove, the outer end of rectangle connection handle with the fork ear all sets up the through-hole, just the rectangle connection handle with the fork ear passes through bolt fixed connection.
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| CN202110574584.3A CN113022887B (en) | 2021-05-26 | 2021-05-26 | Rotor water tunnel test device |
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| CN202110574584.3A CN113022887B (en) | 2021-05-26 | 2021-05-26 | Rotor water tunnel test device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5292088A (en) * | 1989-10-10 | 1994-03-08 | Lemont Harold E | Propulsive thrust ring system |
| CN101643116B (en) * | 2009-08-03 | 2012-06-06 | 北京航空航天大学 | Tiltrotor controlled by double-propeller vertical duct |
| CN112722239B (en) * | 2015-06-01 | 2023-02-28 | 深圳市大疆创新科技有限公司 | Unmanned aerial vehicle |
| CN105539828A (en) * | 2015-12-08 | 2016-05-04 | 陈蜀乔 | Petrol-electric hybrid multi-rotor aerial vehicle capable of self electricity generation |
| KR101690912B1 (en) * | 2016-08-26 | 2016-12-28 | 김태산 | Intermeshing rotor helicopter |
| CN107200126A (en) * | 2017-05-06 | 2017-09-26 | 西安多杰机器人有限公司 | A kind of long endurance depopulated helicopter of big load |
| CN108414189A (en) * | 2018-01-20 | 2018-08-17 | 南京航空航天大学 | A kind of dyeing liquor delivery device for rotating model water tunnel test |
| DE102018107586A1 (en) * | 2018-03-29 | 2019-10-02 | Riedel Communications International GmbH | aircraft |
| CN209241359U (en) * | 2018-12-18 | 2019-08-13 | 辽宁壮龙无人机科技有限公司 | A kind of coaxial double-rotary wing testing stand |
| CN110316401A (en) * | 2019-08-13 | 2019-10-11 | 中国空气动力研究与发展中心低速空气动力研究所 | It is a kind of to drive co-axial rotor propeller hub model to the experimental rig turned |
| CN212401603U (en) * | 2020-10-12 | 2021-01-26 | 中国科学院沈阳自动化研究所 | Unmanned helicopter propeller matching test system |
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