Disclosure of Invention
The invention aims to solve the technical problems that when the existing pitching rotation shaft is used for fixing an ultra-large radar antenna, the pitch rotation shaft spans at two ends are increased, so that the rigidity of a connected antenna framework is poor, and the mechanical pointing precision of the radar is affected.
In order to solve the technical problems, the invention provides the following technical scheme:
The ultra-large caliber radar antenna comprises an antenna framework, a pair of antenna back frames, a pair of rotating gears, a connecting beam, a pair of support arms and a truss, wherein the pair of antenna back frames are positioned at the transverse connection positions of a plurality of sub-frameworks of the antenna framework, one side surface of each antenna back frame is longitudinally connected with the antenna framework, the pair of support arms are respectively connected with the antenna back frames, the pair of rotating gears are positioned between the pair of support arms and are respectively fixedly connected with the other side surface of the antenna back frames, the antenna back frames are driven by the rotating gears to rotate in the pitching direction, two ends of the connecting beam are respectively fixedly connected with the pair of rotating gears, and the truss is positioned under the pair of rotating gears, two ends of the truss are respectively fixedly connected with the pair of support arms, so that the antenna framework, the pair of antenna back frames, the pair of rotating gears and the connecting beam form a closed rigid whole body in a 'arch bridge' -shaped whole body, and the pair of antenna frames, the support arms and the truss form a 'convex' -shaped whole closed rigid whole body.
The device has the advantages that the device can support the rotation of the array surface of the ultra-large heavy-load antenna through the closed rigid whole of the arch bridge type, and the balance structure of the rotation moment is formed. The closed rigid whole in a convex shape prevents the inward collapse deformation under the load of nearly kilotons.
In an embodiment of the present invention, the front side of the antenna skeleton is provided with an antenna unit, the back side of the antenna skeleton is fixedly connected with a pair of the antenna back frames, and the antenna skeleton is formed by arranging, combining and fixedly connecting a plurality of sub-skeletons, and forming a first transverse connection position and a second transverse connection position.
In an embodiment of the present invention, the pair of antenna back frames includes a first antenna back frame and a second antenna back frame, the first antenna back frame is located at the first lateral connection position, the second antenna back frame is located at the second lateral connection position, and one side surfaces of the first antenna back frame and the second antenna back frame are fixedly connected with the antenna framework.
In an embodiment of the present invention, the pair of support arms includes a first support arm and a second support arm, the first support arm is fixedly connected to the first antenna back frame, the second support arm is fixedly connected to the second antenna back frame, the first antenna back frame and the second antenna back frame are located between the first support arm and the second support arm, and the first antenna back frame and the second antenna back frame rotate with the pair of support arms as fulcrums.
In an embodiment of the present invention, each of the support arms includes a base, a first bottom support arm, a second bottom support arm, a third bottom support arm, and a fourth bottom support arm, one end surface of the base is fixedly connected to the ground, the first bottom support arm, the second bottom support arm, the third bottom support arm, and the fourth bottom support arm are sequentially and fixedly connected to another side surface of the base, and in a top view angle, a plane length of the base is greater than a plane length of each of the first bottom support arm to the fourth bottom support arm, and a plane width of the base is the same as a plane width of each of the first bottom support arm and the second bottom support arm.
In an embodiment of the present invention, the pair of rotation gears includes a first rotation gear and a second rotation gear, the first rotation gear is fixedly connected with another side of the first antenna back frame, the second rotation gear is fixedly connected with another side of the second antenna back frame, each rotation gear is formed by splicing a plurality of pairs of ring gear spokes, and meshing teeth on the ring gear are located on an outer ring of the ring gear.
In an embodiment of the invention, the ultra-large caliber radar antenna further includes a driving device, the driving device includes a first driving device and a second driving device, the first driving device is fixedly connected with one end of the truss, the second driving device is fixedly connected with the other end of the truss, the first driving device and the moving device are respectively composed of two sub-driving devices, and the two sub-driving devices are arranged on the same side and simultaneously perform electric elimination.
In an embodiment of the present invention, each sub-driving device includes a driving motor, a speed reducer, a coupling, a meshing gear and a mounting support, each sub-driving device is fixedly connected with the truss through the mounting support, the speed reducer is fixedly connected with an output shaft of the driving motor, the speed reducer is fixedly connected with the meshing gear through the coupling, the meshing gear is meshed with teeth of the rotating gear, the ultra-large caliber radar antenna further includes a braking device, the braking device is fixedly connected with the truss, and the braking device is located at a side close to a pair of pitching support arms, in a normal state, the braking device brakes the rotating gear, when a pitching angle of the antenna skeleton needs to be adjusted, the braking device releases the rotating gear, drives the antenna back frame through the rotating gear, and adjusts the pitching angle of the antenna skeleton.
In an embodiment of the invention, the braking device comprises a first braking device and a second braking device, wherein the first braking device is fixedly connected with one end of the truss, the second braking device is fixedly connected with the other end of the truss, each braking device comprises a fixing frame, a braking clamp and a braking disc, the braking clamp is fixedly connected with the truss through the fixing frame, the braking disc is arc-shaped, one side edge of the braking disc is attached to one side of the rotating gear and is fixedly connected with the rotating gear, and two ends of the braking disc are fixedly connected with the antenna back frame.
The invention also provides a pitch angle rotation method of the ultra-large caliber radar antenna, which comprises the following steps:
the braking device loosens the rotating gear, the driving motor drives the meshing gear to mesh with the rotating gear to drive the rotating gear to rotate in a pitching direction, the rotating gear drives the antenna framework to rotate in a pitching mode through the antenna back frame, and when the antenna framework rotates to a required pitch angle, the driving motor stops driving the meshing gear, then the braking device brakes the rotating gear to lock the antenna framework in a pitching rotation mode.
Compared with the prior art, the antenna frame has the beneficial effects that the antenna frame can meet the requirement that the mechanical caliber azimuth length and the pitching direction of the antenna frame are both more than 30 meters, so that the radar antenna with the mechanical area of about 1000 square of the antenna frame can pitch and rotate, the arc bridge type closed rigid whole can support the rotation of the ultra-large heavy-load antenna array surface on one hand, and the rotating moment balance structure can prevent the inward collapse deformation of nearly kiloton load through the convex type closed rigid whole. The rotating shaft device has the functions of aligning and axially moving so as to adapt to structural deformation caused by temperature difference and gravity. Through the drive arrangement that comprises four sub-drive arrangement, two sub-drive arrangement homonymies set up to carry out the electricity simultaneously and eliminate, can effectively eliminate the distortion of super large span antenna array face in the clearance process that disappears, thereby improve the transmission torsional rigidity of radar.
Detailed Description
In order to facilitate the understanding of the technical scheme of the present invention by those skilled in the art, the technical scheme of the present invention will be further described with reference to the accompanying drawings.
The terms "first," "second," and the like, 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 defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1, the present invention provides an ultra-large caliber radar antenna, which comprises an antenna frame 100, a pair of antenna back frames 200, a pair of support arms 300, a pair of rotation gears 400, a connecting beam 500, and a truss 600. Wherein, a pair of antenna back frames 200 are positioned at the transverse connection of the plurality of sub-frames 110 of the antenna frame 100, and one side of the pair of antenna back frames 200 is connected with the antenna frame 100 longitudinally. The pair of support arms 300 are respectively connected with the antenna back frame 200, the pair of rotating gears 400 are positioned between the pair of support arms 300 and are respectively fixedly connected with the other side surface of the antenna back frame 200, and the antenna back frame 200 is driven by the rotating gears 400 so that the antenna framework 100 rotates in the pitching direction. The two ends of the connecting beam 500 are respectively and fixedly connected with the pair of rotating gears 400, the truss 600 is positioned under the pair of rotating gears 400, and the two ends of the truss 600 are respectively and fixedly connected with the pair of support arms 300, so that the antenna framework 100, the pair of antenna back frames 200, the pair of rotating gears 400 and the connecting beam 500 form an arch bridge type closed rigid whole, and the pair of antenna back frames 200, the pair of support arms 300 and the truss 600 form a convex type closed rigid whole.
Referring to fig. 1 and fig. 3, in an embodiment of the present invention, an antenna unit is mounted on a front surface of an antenna skeleton 100, a rear surface of the antenna skeleton is fixedly connected to a pair of antenna skeletons 200, and the antenna skeleton 100 is formed by arranging and combining a plurality of sub-skeletons 110 and is connected by positioning pins and bolts. In this embodiment, the antenna skeleton 100 is formed by arranging and combining 39 sub-skeletons 110 into a skeleton of 13 rows and 3 columns, so that the mechanical caliber azimuth length and the pitching direction of the antenna skeleton 100 are both more than 30 meters, and the mechanical area of the antenna skeleton 100 is about 1000 square. Wherein the lateral junctions of the plurality of sub-skeletons 110 comprise a first lateral junction 110A and a second lateral junction 110B.
Referring to fig. 1 and fig. 3, in an embodiment of the invention, a pair of antenna frameworks 200 includes a first antenna back frame 210 and a second antenna back frame 220, the first antenna back frame 210 is located at a first transverse connection 110A, and the second antenna back frame 220 is located at a second transverse connection 110B and is longitudinally connected to the antenna frameworks 100 at the transverse connection by positioning pins and bolts. Wherein both ends of each antenna bone are provided with a chamfer 230 and a fixing shaft hole 240.
Referring to fig. 2 and fig. 3, in an embodiment of the invention, the pair of arms includes a first arm 310 and a second arm 320, wherein the first arm 310 is fixedly connected to the first antenna back frame 210, the second arm 320 is fixedly connected to the second antenna back frame 220, the first antenna back frame 210 and the second antenna back frame 220 are located between the two arms, and the first antenna back frame 210 and the second antenna back frame 220 rotate with the pair of arms as fulcrums. For convenience of transportation, the first support arm 310 and the second support arm 320 are processed in a segmented manner, wherein the structural composition, the connection relationship and the working principle of the first support arm 310 and the second support arm 320 are the same, and for simplicity of the description, only the first support arm 310 will be described in detail. The first support arm 310 includes a base 311, a first bottom support arm 312, a second bottom support arm 313, a third bottom support arm 314, and a fourth bottom support arm 315, where an end surface of the base 311 is fixedly connected to the ground a through anchor bolts (not labeled in the figure), and the first bottom support arm 312, the second bottom support arm 313, the third support arm 314, and the fourth support arm 315 are sequentially fixedly connected to one end of the other side surface of the base 311. In a top view, the planar length of the base 311 is greater than the planar lengths of the first bottom support arm 312 to the fourth bottom support arm 315, and the planar width of the base 311 is the same as the planar widths of the first bottom support arm 312 and the second bottom support arm 313. The first bottom sub-arm 312 and the second bottom sub-arm 313 have the same structure and are rectangular blocks. The third upward viewing support arm 314 is a trapezoid block with a closed upper end, the fourth upward viewing support arm 315 is a rectangle block, and one side face deviating from the antenna back frame 200 is beveled, in this embodiment, the antenna skeleton 100 can achieve a rotation angle of-60 ° to +90° by 150 ° under the action of the rotating gear 400, and the fourth support arm 315 is beveled, so that the antenna skeleton 100 is prevented from being contacted and knocked with the fourth upward viewing support arm 315 when rotating to-60 °. In this embodiment, the height of each bottom support arm is 2.7 meters. The ultra-large caliber radar antenna further comprises a rotating shaft device and a plurality of auxiliary pieces 1100, wherein the rotating shaft device comprises a first rotating shaft 710 and a second rotating shaft 720, the bottoms of the rotating shaft device are respectively fixed with a pair of support arms, the output shafts of the rotating shaft device are respectively positioned in the fixed shaft holes 240 of the first antenna back frame 210 and the second antenna back frame 220, and the two ends of the plurality of auxiliary pieces 1100 are respectively fixedly connected with the antenna framework 200 and the rotating gear 400.
Referring to fig. 1 to 3, in an embodiment of the invention, the rotary gear 400 includes a first rotary gear 410 and a second rotary gear 420, the first rotary gear 410 is fixedly connected with the first antenna back frame 210, and the second rotary gear 420 is fixedly connected with the second antenna back frame 210. Each rotating gear is formed by splicing a plurality of sections of gear rings 411 and spokes, and meshing teeth on the gear rings 411 are positioned on the outer ring of the rotating gear 400. One end of the plurality of auxiliary members 1100 is fixedly connected with the other side surface of the antenna frame 200, and the other end is fixedly connected with the inner ring of the rotation gear 400. Specifically, the rotary gear 400 is a shaftless or virtual shaft gear, and the number of the multi-stage ring gears 410 is, for example, 6.
Referring to fig. 1 to 3, in an embodiment of the present invention, the number of the connecting beams 500 is plural, for example, two, and two ends of each connecting beam 500 are fixedly connected with the gear rings 411 of the first rotating gear 410 and the second rotating gear 420, respectively. The antenna framework 100, the pair of antenna back frames 200, the pair of rotating gears 400 and the connecting cross beam 500 form an arch bridge type closed rigid whole, so that the super-large heavy-load antenna array surface can be supported to rotate on one hand, and a rotating moment balancing structure is formed on the other hand.
Referring to fig. 1 to 3, in an embodiment of the invention, the truss 600 includes a first truss 610, a second truss 620 and a third truss 630, wherein one end of the first truss 610 is fixedly connected to the second bottom sub-arm 313 of the first arm 310, and one end of the third truss 630 is fixedly connected to the second bottom sub-arm 313 of the second arm 320. Both ends of the second truss 620 are fixedly connected to the other end of the first truss 610 and the other end of the third truss 630, respectively. In this embodiment, the height of the first arm 310 and the second arm 320 and the distance therebetween are both up to 16 meters,
The pair of antenna back frames 200, the pair of support arms 300 and the truss 600 form a closed rigid whole in a convex shape, so that the inward collapse deformation of a load of nearly kilotons is prevented.
Referring to fig. 2 to 5, in an embodiment of the present invention, the first rotation shaft 710 and the second rotation shaft 720 have the same structure, the same connection relationship and the same working principle, and the embodiment is illustrated by taking the first rotation shaft 710 as an example. The first rotating shaft 710 includes an upper bearing housing 711, a lower bearing housing 712, a pitch shaft 713, a rotary transformer 714, a tuning shaft 715 and a pressing plate 716, wherein the lower bearing housing 712 is fixedly connected with the top surface of the fourth support arm 315, the upper bearing housing 711 is fixedly connected with or integrally formed with the lower bearing housing 712, and the pitch shaft 713, the rotary transformer 714, the tuning shaft 715 and the fixed pressing plate 716 are located in the upper bearing housing 711. Specifically, the resolver 714 is coaxially installed with the pitch axis 713, and is fixedly connected by a bolt, and the resolver 714 engages with the pitch axis 713 to accurately measure the pitch angle of the radar antenna. The inner ring of the aligning shaft 713 is fixedly connected with other parts of the pitching shaft 713, and the aligning bearing 713 has certain angle deviation, so that the antenna is suitable for the conditions of poor rigidity and deformation of a large-span antenna. The inner ring of the pressing plate 716 is fixedly connected with the outer ring of the adjusting shaft 713, and the outer ring of the pressing plate 716 is fixedly connected with the upper bearing seat 711, so that the rotating shaft device 700 has the functions of aligning and axially moving so as to adapt to structural deformation caused by temperature difference and gravity.
Referring to fig. 2 and 6, in an embodiment of the invention, the ultra-large caliber radar antenna further includes a driving device 800 and a braking device, wherein the driving device 800 and the braking device are fixedly connected with the truss 600, one side of the braking device is located near the first support arm 310, and the driving device 800 is located at the other side of the braking device. The driving device 800 comprises a first driving device 810 and a second driving device 820, the first driving device 810 is fixedly connected with the third truss 630, the second driving device 820 is fixedly connected with the first truss 610, the first driving device 810 and the second driving device 820 are respectively composed of two sub-driving devices, namely, the driving device 800 is composed of four sub-driving devices, the two sub-driving devices are arranged on the same side, and meanwhile, electric elimination is carried out, so that the distortion of an ultra-large span antenna array surface in the gap eliminating process can be effectively eliminated, and the transmission torsional rigidity of the radar is improved. Specifically, each sub-driving device includes a driving motor 811, a speed reducer 812, a coupling 813, a meshing gear 814 and a mounting support 815, each sub-driving device is fixedly connected with the truss 600 through the mounting support 815, the speed reducer 812 is fixedly connected with an output shaft of the driving motor 811, the speed reducer 812 is fixedly connected with the meshing gear 814 through the coupling 813, and the meshing gear 814 is meshed with teeth of the rotating gear 400. The driving motor 811 supplies power to the driving device 800, meshes the teeth of the meshing gear 814 and the rotation gear 400 via the speed reducer 812 and the coupling 813, and adjusts the pitch angle of the antenna frame 100 by rotating the gear 400.
Referring to fig. 1, 7 and 8, in an embodiment of the present invention, the braking device 900 includes a first braking device 910 and a second braking device (not labeled in the drawings), where the first braking device 910 is fixedly connected to the first truss 610, and the second braking device is fixedly connected to the third truss 630. Each braking device comprises a fixing frame 911, a braking clamp 912 and a braking disc 913, wherein the braking clamp 912 is fixedly connected with the truss 600 through the fixing frame 911, the braking disc 913 is in an arc shape, one side edge of the braking disc 913 is attached to one side of the rotary gear 400 and is fixedly connected with the rotary gear 400, and two ends of the braking disc 913 are fixedly connected with the antenna back frame 200. The brake caliper 912 is hydraulic or multi-electromagnetic, the brake system of the brake caliper 912 is normally in a normally closed mode, the brake caliper 912 clamps the brake disc 913 to brake the rotary gear 400, the pitching angle of the antenna skeleton 100 is kept, when the pitching angle of the antenna skeleton 100 needs to be adjusted, the brake caliper 912 is opened, the brake disc 913 is loosened, the driving device 800 is opened, the meshing gear 814 is meshed with the rotary gear 400, the rotary gear 400 is enabled to rotate in a pitching direction, the rotary gear 400 drives the antenna skeleton 100 to rotate in a pitching direction through the antenna back frame 200, the driving device 800 is turned off, the brake caliper 912 is braked again, and the pitching rotation of the antenna skeleton 100 is locked. In an embodiment of the present invention, the ultra-large caliber radar antenna further includes a master controller, where the master controller is communicatively connected to the rotation shaft device, the driving device 800 and the braking device 900, and the master controller controls the rotation shaft device to precisely measure the pitch angle of the radar antenna, controls the driving device 800 to drive the rotation gear 400 to rotate to adjust the pitch angle, and controls the braking device 900 to brake the brake disc 913 and the rotation gear 400 to lock the antenna skeleton 100 from rotating in pitch when the antenna skeleton 100 rotates to a desired pitch angle.
Referring to fig. 1,2, 9 and 10, in an embodiment of the present invention, the ultra-large aperture radar antenna further includes a buffer 1200, a first auxiliary element 1300 and a second auxiliary element 1400. The damping member 1200 includes a mounting frame 1210, a reinforcing member 1220 and a damping member 1230, wherein the mounting frame 1210 is L-shaped, one side surface of the mounting frame 1210 is fixedly connected with the base 311, two side edges of the reinforcing member 1220 are respectively fixedly connected with the mounting frame 1210, the damping member 1230 passes through the other side surface of the mounting frame 1210, so that the damping member 1230 faces the antenna frame 100, and when the antenna frame 100 exceeds a specified pitching angle, the damping member 1230 is bumped to slow down the movement speed until stopping. The pair of first auxiliary elements 1300 are fixedly connected with the first support arm 310 and the second support arm 320 respectively, one end of the first auxiliary element 1300 is fixedly connected with the other end of the top surface of the base 311, and the other end of the first auxiliary element 1300 is fixedly connected with the third bottom support arm 314. The number of the damper 1200 is plural, and the damper 1200 is further provided on the pair of first auxiliary members 1300, and when the antenna frame 100 exceeds a prescribed pitch angle, the damper 1230 is hit to slow down the movement until stopping. A pair of second auxiliary members 1400 are fixedly secured to the first arm 310 and the second arm 320, respectively, and one end of one second auxiliary member 1400 is fixedly secured to the first truss 610 and the other end is fixedly secured to the second bottom arm 312. One end of the other second auxiliary member 1400 is fixedly coupled to the third truss 630, and the other end is fixedly coupled to the third bottom sub-arm 314 of the other arm.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
The above-described embodiments merely represent embodiments of the invention, the scope of the invention is not limited to the above-described embodiments, and it is obvious to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.