CN202737087U - Large-scale high-accuracy parabolic offset antenna - Google Patents
Large-scale high-accuracy parabolic offset antenna Download PDFInfo
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- CN202737087U CN202737087U CN2012204468271U CN201220446827U CN202737087U CN 202737087 U CN202737087 U CN 202737087U CN 2012204468271 U CN2012204468271 U CN 2012204468271U CN 201220446827 U CN201220446827 U CN 201220446827U CN 202737087 U CN202737087 U CN 202737087U
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Abstract
The utility model discloses a large-scale high-accuracy parabolic offset antenna which comprises an antenna body (1), a feed source array bracket (2), feed source arrays (3), a rotary table (4) and a counter weight device (5). The antenna body (1) is arranged at one end of the feed source array bracket (2); the other end of the feed source array bracket (2) is provided with at least one transition bracket mounting surface; the feed source arrays (3) are respectively arranged at the top ends of transition brackets (6); the rotary table (4) is arranged at the bottom of the feed source array bracket (2); and the counter weight device (5) is connected at the end of the feed source array bracket (2), which is close to the feed source arrays (3). According to the utility model, a profile attachment technology is adopted and the manufacturing cost is reduced; a profile is riveted and cured and the problems of complex structure and control for the integral weight of a large-scale antenna are solved; a reflector skeleton adopts a truss structure, the feed source array bracket adopts a truss and thin shell beam mixed structure, and the structure design under a heavy load and under the complex boundary conditions of low weight, high stiffness requirement and the like is implemented.
Description
Technical field
The utility model relates to the parabolic offset-fed antenna of a kind of large-scale high-precision.
Background technology
Offset-fed antenna is for Prime Focus Antenna, and the installation site that refers to the feed of offset-fed antenna and tuner is not vertical with the center of antenna tangent plane and cross on the straight line of center of antenna.The feed of just presenting parabolic antenna is positioned at the main beam of antenna, thereby the electric wave that receives formed blocks, and has reduced the gain of antenna, has increased secondary lobe.Feed is shifted out the bore of antenna reflective face, can eliminate feed and supporter thereof and block electromagnetic.Therefore, just there is not the impact of so-called feed shade, at antenna area, machining accuracy, under the identical prerequisite of receive frequency, the gain of offset-fed antenna is greater than Prime Focus Antenna.The maximum characteristics of offset-fed antenna are that secondary lobe is little.When the irradiation taper at reflecting surface edge was 15 ~ 20dB, the sidelobe level of offset-fed antenna was improved 8 ~ 10dB than front feed antenna.Because feed has been avoided the echo from reflecting surface, thereby also improved the standing-wave ratio of antenna.In addition, receive satellite television in the higher area of latitude, the reflecting surface of offset-fed antenna is almost vertical with ground, is difficult for gathering sleet, thereby, in small-bore TV Receiver System for Direct, be widely used.
Along with the progress of technology, traditional large-scale high-precision circle parabolic antenna is comparatively common, but its complex structure, weight is large, and manufacturing cost is also high, and parabolic offset-fed antenna has been subject to attention gradually with its unique electrical property advantage.The tradition high-precision antenna generally takes the fetal membrane of covering to stretch to realize, but to large-scale offset-fed antenna, its fetal membrane area surpasses 122 square meters, the fetal membrane cost is high, if adopt traditional parabola look up to heaven manufacturing, model detection mode, so in order to guarantee the required precision of profile after gravity direction changes under the vertical operating state, then the rigidity of backrest required to reach a high level, at first being the extremely complicated difficulty of its structure realization meeting, secondly is that its weight is extremely heavy, can be greater than 16 tons.And the higher cross polarization radiation of asymmetric meeting generation of the structure of offset-fed antenna, and along with the bore of antenna increases, it is very large that the distance of feed and reflecting surface also becomes, and the asymmetry of reflecting surface also can be brought difficulty to processing, therefore less employing in large antenna.
In addition, also there is following problem in existing large-scale offset-fed antenna: the skeleton structure steadiness of (1) antenna body is poor, causes the wind loading rating of antenna body relatively poor, easily produces distortion; (2) antenna body adopts integral structure, and is bulky, and processing, transportation, installation and use are all very inconvenient; (3) error of antenna in manufacture process is larger; (4) Heavy Weight of traditional feed battle array supporting structure, and rigidity is relatively poor, and bearing capacity is limited; (4) the loudspeaker quantity that comprises in the feed battle array is large, feed battle array monnolithic case size large (generally surpassing 3m), and processing, installation and use are all not too convenient.
The utility model content
The purpose of this utility model is to solve the deficiencies in the prior art, a kind of employing profile coating technique is provided, under the prerequisite that guarantees the profile precision, greatly reduce manufacturing cost, Real-Time Monitoring adjustment in the manufacture process, avoided after the each dismounting of antenna as realizing loaded down with trivial details and complicated fine setting problem that precision is carried out, lightweight, the parabolic offset-fed antenna of the large-scale high-precision that stiffness is strong.
The purpose of this utility model is achieved through the following technical solutions: the parabolic offset-fed antenna of large-scale high-precision, it comprises antenna body, feed battle array support, feed battle array, turntable and counter weight device, antenna body is located at an end of feed battle array support, the other end of feed battle array support is provided with at least one transition bracket installed surface, transition bracket is installed on the transition bracket installed surface, the feed battle array is installed in respectively the top of transition bracket, turntable is located at the bottom of feed battle array support, and counter weight device is connected to feed battle array support near an end of feed battle array; Described antenna body is comprised of reflector panel and reflector skeleton, the reflector panel is comprised of covering and the gusset by the sunk head rivet riveted joint, the reflector skeleton adopts space truss structure, the skeleton Nodes connects by the spherojoint transition piece, and the gusset of reflector panel is by structural member and the riveted joint of reflector skeleton; Antenna body is comprised of at least two piecemeals, links to each other by the flange with locating taper pin between each piecemeal.
The feed battle array is comprised of a plurality of piecemeals, and a plurality of piecemeal splicing general assemblies form the feed battle array.
The truss structure that feed battle array support adopts steel-pipe welding to form is main, and the part is aided with the hybrid combination of shell girder construction.
Counter weight device is the counterweight hanging basket.
Covering is the thick punching aluminium sheet covering of 1.5mm.
Gusset is " L " shape aluminium section bar gusset.
The reflector skeleton is connected with feed battle array support by the flange arrangement with alignment pin.
The beneficial effects of the utility model are:
1. adopt the profile coating technique, under the prerequisite that guarantees the profile precision, significantly controlled manufacturing cost with respect to the precision implementation of covering fetal membrane drawing and forming;
2. make under the realization operating state, adopt two stations three-dimensional laser transit measuring system to carry out the Real-Time Monitoring adjustment, the method that profile adopts riveted joint to solidify, efficiently solve the problem of large-scale antenna complex structure, overall weight control, and can effectively avoid the loaded down with trivial details and complicated problems such as fine setting for realizing that precision is carried out after the each dismounting of antenna;
3. the reflector skeleton adopts truss structure, and feed battle array support adopts the method for truss and shell beam mixed structure to realize in the particular space scope, and heavy duty is lower, the structural design under the complicated boundary conditions such as low weight, high stiffness requirement.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model covering and link of boards structural representation;
Fig. 3 is the syndeton schematic diagram of the utility model reflector skeleton and reflector reflector panel;
Fig. 4 is the utility model antenna body partitioned organization schematic diagram;
Among the figure, 1-antenna body, 2-feed battle array support, 3-feed battle array, 4-turntable, 5-counter weight device, 6-transition bracket, 7-reflector panel, 8-reflector skeleton, 9-covering, 10-gusset, 11-structural member.
Embodiment
Below in conjunction with accompanying drawing the technical solution of the utility model is described in further detail, but protection range of the present utility model is not limited to the following stated.
As shown in Figure 1, the parabolic offset-fed antenna of large-scale high-precision, it comprises antenna body 1, feed battle array support 2, feed battle array 3, turntable 4 and counterweight hanging basket 5, antenna body 1 is located at an end of feed battle array support 2, the other end of feed battle array support 2 is provided with at least one transition bracket installed surface, transition bracket 6 is installed on the transition bracket installed surface, feed battle array 3 is installed in respectively the top of transition bracket 6, turntable 4 is located at the bottom of feed battle array support 2, and counterweight hanging basket 5 is connected to feed battle array support 2 near an end of feed battle array 3.
The gusset 10 of reflector panel 7 is by structural member 11 and 8 riveted joints (as shown in Figure 3) of reflector skeleton; Can realize by the applying of 9 pairs of high-precision profiles of covering corresponding profile required precision after choosing suitable gusset spacing, so just the fetal membrane cost has been lacked in reduction, use the method, choose suitable gusset spacing, the root-mean-square value that process being dismounted for multiple times and reinspection finally record this reflector antenna is stabilized in 1.6r.m.s.Be chosen under pair monitoring of station three-dimensional laser transit measuring systems and make the implementation method of detection in vertical operating state, monitor with two stations three-dimensional laser transit measuring system in the assembling, when gusset 10 is adjusted to the tram, can the drilling riveted joint solidify on structural member 11 and gusset 10, the reflector panel 7 after the curing has been exempted the traditional round parabolic antenna and has been repeated to install and remove rear necessary adjustment and recheck this very long and complicated process.
As shown in Figure 4, for satisfying movement requirement, reflector panel 7 and reflector skeleton 8 are divided into five, link to each other by the flange with locating taper pin between each piecemeal, can satisfy after ressembling, directly meet the requirement of relevant design standard in the situation that whole antenna body 1 does not take any setting and machinery to adjust.
In order to guarantee to design input requirements and consider integrally-built harmony, the truss structure that feed battle array support 2 adopts steel-pipe welding to form is main, the part is aided with the hybrid combination of shell girder construction, truss structure is taked at feed battle array support 2 positions of bearing Main Load, requiring the fabulous position employing shell girder construction that is subjected to heavy duty of rigidity, so just effectively reduce overall weight, and can guarantee that integrated model has enough rigidity.Since the bearing capacity of turntable 4 a little less than, and need to be from 0 °～10 ° per 2 ° of pitching adjustment of carrying out the one action state during antenna system work, calculate by analysis and adjust optimization, with the center arrangement of turntable 4 apart from parabolic initial point 2.9m place, and design counterweight hanging basket 5 guarantees that to carry out suitable counterweight for different luffing angles deviation of gravity center turntable 4 center maximums are no more than 260mm under the prerequisite of control gross weight.
In design process, the CAE finite element analysis groupware of our whole-process application MSC company is verified design concept and parameter and is optimized, and has guaranteed the optimization of design result, and practice is proof also, and everything is successfully.The below provides the results of optimization: maximum strain 12.5 mm that carry the effect drag at 15m/s wind; Feed battle array support 2 maximum distortion 1.3mm under load; Carry maximum stress 149 MPa of effect drag at 35m/s wind.Can see that by analysis result antenna is fine in the rigidity that 15m/s wind carries the effect drag, satisfy instructions for use fully; And the selected material of antenna structure is steel pipe and the steel plate of trade mark 16Mn, its σ s 〉=345 MPa, σ b 〉=510 MPa; Therefore under the effect that 35m/s wind carries, the structural strength coefficient of safety is NS 〉=345/149=2.31.
Claims (7)
1. the parabolic offset-fed antenna of large-scale high-precision, it is characterized in that: it comprises antenna body (1), feed battle array support (2), feed battle array (3), turntable (4) and counter weight device (5), antenna body (1) is located at an end of feed battle array support (2), the other end of feed battle array support (2) is provided with at least one transition bracket installed surface, transition bracket (6) is installed on the transition bracket installed surface, feed battle array (3) is installed in respectively the top of transition bracket (6), turntable (4) is located at the bottom of feed battle array support (2), and counter weight device (5) is connected to feed battle array support (2) near an end of feed battle array (3);
Described antenna body (1) is comprised of reflector panel (7) and reflector skeleton (8), reflector panel (7) is comprised of covering (9) and the gusset (10) by the sunk head rivet riveted joint, reflector skeleton (8) adopts space truss structure, the skeleton Nodes connects by the spherojoint transition piece, and the gusset (10) of reflector panel (7) is by structural member (11) and reflector skeleton (8) riveted joint; Antenna body (1) is comprised of at least two piecemeals, links to each other by the flange with locating taper pin between each piecemeal.
2. the parabolic offset-fed antenna of large-scale high-precision according to claim 1, it is characterized in that: described feed battle array (3) is comprised of a plurality of piecemeals, and a plurality of piecemeals splicing general assemblies form feed battle arrays (3).
3. the parabolic offset-fed antenna of large-scale high-precision according to claim 1, it is characterized in that: the truss structure that described feed battle array support (2) adopts steel-pipe welding to form is main, and the part is aided with the hybrid combination of shell girder construction.
4. the parabolic offset-fed antenna of large-scale high-precision according to claim 1, it is characterized in that: described counter weight device (5) is the counterweight hanging basket.
5. the parabolic offset-fed antenna of large-scale high-precision according to claim 1, it is characterized in that: described covering (9) is the thick punching aluminium sheet covering of 1.5mm.
6. the parabolic offset-fed antenna of large-scale high-precision according to claim 1, it is characterized in that: described gusset (10) is " L " shape aluminium section bar gusset.
7. the parabolic offset-fed antenna of large-scale high-precision according to claim 1, it is characterized in that: described reflector skeleton (8) is connected with feed battle array support (2) by the flange arrangement with alignment pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204468271U CN202737087U (en) | 2012-09-04 | 2012-09-04 | Large-scale high-accuracy parabolic offset antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204468271U CN202737087U (en) | 2012-09-04 | 2012-09-04 | Large-scale high-accuracy parabolic offset antenna |
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| Publication Number | Publication Date |
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| CN202737087U true CN202737087U (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204468271U Expired - Lifetime CN202737087U (en) | 2012-09-04 | 2012-09-04 | Large-scale high-accuracy parabolic offset antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790257A (en) * | 2012-09-04 | 2012-11-21 | 成都锦江电子系统工程有限公司 | Large-scale high-accuracy parabolic offset antenna |
-
2012
- 2012-09-04 CN CN2012204468271U patent/CN202737087U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790257A (en) * | 2012-09-04 | 2012-11-21 | 成都锦江电子系统工程有限公司 | Large-scale high-accuracy parabolic offset antenna |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130213 |
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| CX01 | Expiry of patent term |