[0025] The specific embodiments of the present invention will be described below in conjunction with the drawings.
[0026] see figure 1 , figure 2 , Figure 7 , The present invention includes a head cone section 1 and a cabin body 2. The head cone section 1 is fixed to the cabin body 2. The rear end of the cabin body 2 is equipped with a tail wing, and the front end of the head cone section 1 is sleeved with a ventilating bowl 3 for ventilation. The front end of the bowl 3 is equipped with a cavitator 4. The cabin 2 includes a pressure test cabin 201, a motor cabin 202, a feedback cabin 203, and a tail cabin 204 arranged in sequence along the axial direction. The pin 15 is fixedly connected and sealed with an O-ring 16. The cabin 2 is equipped with a steering gear 5, which includes a transmission shaft 501 and a hollow shaft 502. The transmission shaft 501 is driven by a servo motor 503 and a deceleration A rotary encoder 505 is mounted on the transmission shaft 501, and the driving bevel gear 506 is fixedly connected to the shaft end of the transmission shaft 501; the two ends of the hollow shaft 502 are respectively fixedly connected with a rudder shaft 507, a rudder shaft 508, and a hollow shaft 502. The axis is perpendicular to the axis of the transmission shaft 501, the hollow shaft 502 is provided with a driven bevel gear 509, and the driving bevel gear 506 meshes with the driven bevel gear 509 for transmission; the servo motor 503 and the reducer 504 are fixedly supported in the motor compartment along the axial direction In 202, the rotary encoder 505 is located in the feedback cabin 203, the transmission shaft 501 passes through the feedback cabin 203 and extends into the tail cabin 204, and the rudder shaft 507 is rotatably supported in the tail cabin through the bearing 6 and the top cover 7. On section 204, the top cover 7 is fixedly mounted on the empennage section 204, the second rudder shaft 508 is supported on the empennage section 204 through the sleeve 8, and the rudder shaft 507 and the second rudder shaft 508 form the tail.
[0027] Further, see image 3 , Figure 4 , Figure 7 , Figure 8 , The hollow shaft 502 is an integral structure or a split structure; when the hollow shaft 502 is an integral structure, a driven bevel gear 509 is provided on the hollow shaft 502, and the driven bevel gear 509 meshes with the driving bevel gear 506 Transmission; when the hollow shaft 502 is a split structure, the hollow shaft 502 is composed of a divided hollow shaft section 5021 and a hollow shaft section two 5022, a total of two divided half shaft sections, hollow shaft section one 5021 and hollow shaft section two 5022 The central axis of the hollow shaft section 5021 and the hollow shaft section 5022 are respectively provided with a driven bevel gear 509, and the two driven bevel gears 509 are respectively meshed and driven with the driving bevel gear 506.
[0028] Specifically, see image 3 , Figure 4 , Figure 5 , Image 6 The hollow shaft 502 is provided with a through hole 5023 in the center of the shaft at both ends of the hollow shaft 502, a square groove 5024 is provided in the center of the intermediate shaft of the hollow shaft 502, the through hole 5023 is axially connected with the square groove 5024, and the square groove 5024 At least two threaded through holes 5025 are respectively provided on the symmetrical side walls, and the axis of the threaded through hole 5025 is perpendicular to the axis of the hollow shaft 502; both ends of the rudder shaft 507 and rudder shaft 508 have a symmetrical flat position 9, The flat position 9 is provided with two threaded through holes 10; when the hollow shaft 502 is an integral structure, the two rudder shafts are inserted from both ends of the hollow shaft 502 through the through holes 5023. The position 9 extends into the square groove 5024, and the two rudder shafts are fixedly mounted on the hollow shaft 502 by the fastening screws installed in the threaded through hole 5025 and the threaded through hole 10; when the hollow shaft 502 is a split type In the structure, cross section along the shaft where the square groove 5024 is located to form two semi-shaft sections, hollow shaft section one 5021 and hollow shaft section two 5022, and hollow shaft section 5021 and hollow shaft section two 5022 are respectively provided with at least A pair of threaded through holes 5025, the two rudder shafts are inserted from the through holes 5023 on the hollow shaft section one 5021 and the hollow shaft section two 5022 respectively, and the flat positions 9 of the two rudder shafts respectively extend into the hollow shaft section The square groove 5024 of one 5021 and the second hollow shaft section 5022 is fixedly mounted on the hollow shaft section one 5021 and the hollow shaft through the fastening screws installed in the threaded through hole one 5025 and the threaded through hole two 10 respectively. Shaft section two 5022 on. In order to enable the hollow shaft 5 to withstand a certain strength and torque, the hollow shaft 5 is arranged in a structure with narrow ends and a wide middle.
[0029] Further, when the hollow shaft 502 has a split structure, in order to ensure that the rotating shafts of the rudder shaft 507 and the rudder shaft 508 are concentric, the rudder shaft 508 is provided with a shaft head 11 outside the flat position 9 and the hollow shaft section 5021 A groove is provided on the end face facing the second hollow shaft section 5022, a collar 12 is arranged in the groove, and the shaft head 11 extends into the collar 12, one end of the collar 12 abuts against the bottom of the groove, the collar 12 The other end abuts against the end surface of the flat position 9 on the second rudder shaft 508.
[0030] The steering gear device of the present invention can realize the active control of the two rudder shafts by simply changing the structure of the hollow shaft 501, so that the two rudder shafts can rotate in the same direction or in the reverse direction (differential). ), at the same time, the entire steering gear device 5 has a compact structure and a small volume. By improving the cabin structure of the supercavitation vehicle model, the steering gear device 5 can be integrated into the cabin 2 of the model as a whole, and the steering gear device 5 When integrated in the cabin 2, in order to ensure the strength and torque of the transmission shaft 501, a connecting shaft 510 is installed between the transmission shaft 501 and the driving bevel gear 506. The seal between the motor compartment 202 and the feedback compartment 203 is sealed by an O-ring 16. A sealing sleeve 17 is provided between the drive shaft 501 and the mounting hole on the feedback compartment 203. The sealing sleeve 17 and The feedback compartment 203 is fixedly connected. Between the outer peripheral surface of the sealing sleeve 17 and the inner surface of the mounting hole on the feedback compartment 203, and between the inner peripheral surface of the sealing sleeve 17 and the outer peripheral surface of the transmission shaft 501 are provided The O-ring 16 seals.
[0031] Specifically in the actual model test, since the cabin 2 is a segmented structure, the connecting block 205 is used to connect the pressure test cabin section 201 and the motor cabin section 202 to increase the connection strength of the entire cabin body 2. When the two rudder shafts rotate in the same direction or in the reverse direction, measure the hydrodynamic forces, such as drag, lift and bending moment, on the entire model. A force measuring balance 13 is fixed at the tail of the tail section 204 to prevent The incoming flow interferes with the force measurement of the force measurement balance 13, and a stop sleeve 18 is sleeved on the outside of the force measurement balance 13. The rear end of the stop sleeve 18 is fixedly connected to the tail support rod 21 through the connecting section 19, the adjusting block 20, and the setting of the adjusting block 20 It can be used to adjust the inclination angle of the Zhengege model, and the tail support rod 21 is fixedly connected with the tail support frame of the water tunnel. In this way, the entire supercavitation vehicle model and measuring device are installed on the water tunnel. Among them, the cavitator 4 It is a supercavitating generator. The gas is introduced into the model from an external gas source through a hose and the gas is supplied to the aeration bowl 3. Specifically, in the embodiment of the present invention, the pressure chamber section 201 is connected to the inner cavity of the cone section 1 An airtight joint 22 is provided on the wall surface of the airtight joint 22, and the hose for conveying gas is connected to the airtight joint 22. The cone section 1 is provided with a through hole in the cone section inside the vent bowl 3, thereby providing an external gas source The body first enters the inner cavity of the cone section 1 through the hose, and then passes into the aeration bowl 3 through the through hole of the head of the cone section 1, thereby forming supercavitation on the surface of the model. The generation technology of supercavitation belongs to the prior art. The operation mode of the present invention is as follows:
[0032] Control the two rudder shafts to rotate synchronously and in the same direction: a hollow shaft 502 with an integral structure is used in the steering gear device. At this time, the hollow shaft 502 is provided with only one driven bevel gear 509, and the servo motor 503 passes After the deceleration and torque increase of the reducer 3, the drive shaft 1 and the driving bevel gear 4 are driven to move, and the driving bevel gear 506 and the driven bevel gear 509 on the hollow shaft 502 are engaged and driven to drive the hollow shaft 502 and the hollow shaft 502 The fixedly connected rudder shaft 507 and rudder shaft 508 rotate in the same direction simultaneously. During the rotation, the rotary encoder 505 is used to feed back the rotation angles of the two rudder shafts in real time; the force measuring balance 13 in the measuring device is based on the measurement requirements Set up, if you need to measure the three components of resistance, lift and moment at the same time, you can use a three-component force balance. In the motion mode where the two rudder shafts rotate in the same direction, the three-component force balance can measure the sailing body model. The three hydrodynamic performances of resistance, lift, and bending moment received as a whole, if only a single component or two components of resistance, lift or moment are required, the corresponding single-component or two-component balance can be used.
[0033] Control the two rudder shafts to rotate synchronously and in opposite directions: a hollow shaft 502 with a split structure is used in the steering gear device. At this time, the hollow shaft 502 is provided with two driven bevel gears 509, namely the hollow shaft Section one 5021 and hollow shaft section two 5022 are respectively provided with a driven bevel gear 509. The servo motor 503 and the reducer 504 drive the transmission shaft 501 and the driving bevel gear 506 to move. The driving bevel gear 506 interacts with the two driven bevel gears. The meshing transmission of the bevel gear 509 drives the hollow shaft section one 5021 and the hollow shaft section two 5022 to rotate, and the two shaft sections rotate in opposite directions, and then drives the rudder shaft one 507 fixedly connected to the two shaft sections. The second rudder shaft 508 rotates synchronously and reversely. During the rotation, the rotary encoder 505 is used to feed back the rotation angle of the two rudder shafts in real time; the force measuring balance 13 in the measuring device is a torsion balance. In the motion mode of synchronous and reverse rotation of the shaft, the rolling moment of the entire vehicle model can be measured by the torsion balance.
[0034] A pressure sensor 14 is installed in the pressure test chamber 201 to measure the surface pressure of the model in the supercavitation test state.
[0035] The steering gear device 5 of the present invention is compact in structure and small in size. Through the design of the segmented structure of the cabin 2 in the supercavitating vehicle model structure, the steering gear device 5 can be integrated and arranged in the supercavitating vehicle model cabin In the limited space of the body 2, at the same time, by simply changing the structure of the hollow shaft 502 in the steering gear device, the active control of the two rudder shafts can be realized, that is, the two rudder shafts can be synchronized in the same direction. Rotation or synchronous reverse rotation (differential), and angle feedback to the two rudder shafts. On this basis, the model test can accurately capture the hydrodynamic characteristics of the vehicle in the dynamic control state, which is the overall model of the vehicle The realization of design and other functions provides more space and freedom at the same time.
[0036] The above description is an explanation of the present invention, not a limitation of the present invention. For the scope of the present invention, please refer to the appended claims. Any form of modification can be made within the protection scope of the present invention.
