CN113300073A - Large antenna with combined shock insulation and absorption structure - Google Patents
Large antenna with combined shock insulation and absorption structure Download PDFInfo
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- CN113300073A CN113300073A CN202110716637.0A CN202110716637A CN113300073A CN 113300073 A CN113300073 A CN 113300073A CN 202110716637 A CN202110716637 A CN 202110716637A CN 113300073 A CN113300073 A CN 113300073A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/005—Damping of vibrations; Means for reducing wind-induced forces
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/20—Resilient mountings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
Abstract
The invention discloses a large antenna with a combined shock insulation and absorption structure, and belongs to the technical field of antennas. The structure comprises a reflector, a seat frame, a cable power device, an upper-layer damping structure, a middle-layer damping structure and a lower-layer damping structure. The invention has stable state when no earthquake occurs and does not influence the accurate running of the antenna, can effectively play the role of shock insulation and shock absorption in the earthquake occurrence process, and has the advantages of light weight, low cost, easy installation and replacement and the like.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a large antenna with a combined shock insulation and absorption structure.
Background
With the great development of the social science and technology ability, the radio astronomy has entered into a large sample age with high sensitivity, and a large radio telescope antenna plays an important role therein. The demand of human beings on increasingly deep and urgent exploration in space further drives the construction requirement of large radio telescope antennas, in particular to large full-movable reflector type telescope antennas with the caliber of about fifty meters or even more than one hundred meters.
Typically, the main structure of such large antennas comprises mainly two parts, namely a chassis part and a reflector part. Wherein the reflector part functions as a functional part of the antenna. The reflector bears a large-area reflecting surface for receiving electromagnetic wave signals collected in the deep space, not only has a more complex structural form, but also can be provided with a plurality of expensive and precise devices, which is the main contradiction of the antenna. The seat frame belongs to a steel structure support subordinate part with a simpler structure form and has the function of supporting and driving the reflector part to perform pitching and azimuth motion.
For decades, humans have built more and more large telescope antennas but their basic form is rarely innovative. Such as 65 meters astronomical telescope built in Shanghai, 66 meters deep space exploration antenna built in Jia Musi, 70 caliber antenna built in Tianjin, and 120 meters antenna in Yunnan. Such conventional large antenna structures are characterized by high height, large weight and volume. The reflector portion is connected to the mount only by two pitch axis seating positions. The form hardly considers the damage of earthquake to the antenna structure from the perspective of structural design, and no active shock absorption measure is taken. In addition, the construction and site selection of the large telescope antenna mainly pursues a pure electromagnetic environment far away from modern human life and the requirement of large span of networking observation among a plurality of large antennas, but mainly considers the influence of earthquake. Therefore, besides the large-scale built antennas, some devices which are not built can be built on the seismic belt, and the potential hazard of earthquake ring breaking exists. If once earthquake happens, the large antenna with huge height, weight and volume can directly bear the impact and vibration brought by earthquake waves, and deformation, damage and collapse are easy to happen, and the consequences are not imaginable.
In recent years, domestic seismic isolation and absorption technologies for dealing with earthquake disaster damage are developed greatly and are widely popularized and applied to many high-rise buildings and large-scale equipment. Among them, the vibration isolation rubber support is more applied. The support mainly comprises a sandwich structure formed by tightly combining a steel plate and rubber, and not only has very high vertical bearing capacity, but also has larger horizontal deformation capacity and repeated load fatigue resistance. In practical engineering application, a flexible shock insulation layer is added between an upper layer structure and a foundation, and a rubber shock insulation support is installed to play a role in flexible connection with the foundation. When an earthquake occurs, most of energy generated by the earthquake is absorbed by the flexible seismic isolation layer in the process of transmitting to the upper structure, and only a small part of energy is transmitted to the upper structure. It is understood that by such a technique, it is possible to offset about 80% of the seismic destruction energy, thereby effectively reducing the seismic destruction effect of the superstructure and improving the safety of the superstructure.
Therefore, by combining the respective characteristics of the large antenna structure and the rubber shock-isolation support, a main body structure of the large antenna with the active shock-isolation and shock-absorption functions needs to be developed. The novel structural form has the advantages that the state is stable when no earthquake occurs, the accurate operation of the antenna is not influenced, and the shock insulation and absorption effects can be effectively realized in the earthquake occurrence process.
Disclosure of Invention
In view of the above, the present invention provides a large antenna with a combined vibration isolation and absorption structure. The main structure of the antenna is stable in state when no earthquake occurs and does not influence the accurate operation of the antenna, and can effectively play the roles of shock insulation and shock absorption in the earthquake occurrence process, and has the advantages of light weight, low cost, easy installation and replacement and the like.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a large antenna with a combined shock insulation and absorption structure comprises a reflector, a seat frame bearing the reflector, an azimuth rotating structure, an upper-layer shock absorption structure, a middle-layer shock absorption structure and a foundation shock absorption structure; the azimuth rotating structure comprises a foundation and a roller carrier, wherein an annular steel rail is arranged on the foundation; the bottom of the roller carrier is provided with a roller which moves on the annular steel rail, and the roller drives the roller carrier to do circular motion on the annular steel rail; the upper layer shock absorption structure is located between the reflector and the seat frame, the middle layer shock absorption structure is located between the roller carrier and the seat frame, and the foundation shock absorption structure is located at the bottom of the foundation.
Furthermore, the azimuth rotating structure also comprises dampers which correspond to the rollers one by one; and two ends of the damper are respectively connected to the rotating shaft of the roller and the bottom of the roller frame.
Further, the damper is a steel damper, a mild steel shear damper or a hydraulic viscous damper.
Further, the upper layer damping structure, the middle layer damping structure and the foundation damping structure are respectively a friction pendulum damping structure, a rubber shock insulation structure or any combination of the friction pendulum damping structure and the rubber shock insulation structure.
Furthermore, the friction pendulum damping structure is a simple pendulum structure or a compound pendulum structure.
Furthermore, the friction pendulum damping structure comprises an upper seat plate, a damping pendulum and a lower seat plate which are sequentially arranged from top to bottom; the bottom surface of the upper seat plate and the bottom surface of the damping pendulum are both smooth convex surfaces, the top surface of the damping pendulum and the top surface of the lower seat plate are both smooth concave surfaces, and the smooth concave surfaces and the smooth convex surfaces are respectively in one-to-one correspondence; the top of the lower seat plate is also provided with a shock insulation stop block, and the shock insulation stop block and the lower seat plate are fixed through a shear pin bolt perpendicular to the shock insulation stop block and the lower seat plate; the shock absorption pendulum is positioned in an area formed by the shock insulation stop block, and the shock absorption pendulum is tightly attached to the shock insulation stop block; the edge of the top of the lower seat plate is provided with a limiting wall for restricting the horizontal movement of the upper seat plate.
Further, the rubber shock insulation structure comprises an upper plate and a lower plate, the upper plate and the lower plate are parallel to each other, a lead core column perpendicular to the upper plate is arranged between the upper plate and the lower plate, and a rubber steel plate spacing layer is sleeved on the outer wall of the lead core column; the rubber steel plate spacing layer is a rubber layer and a steel plate layer which are sequentially overlapped, and the lead core column is perpendicular to the rubber layer and the steel plate layer; the upper plate is simultaneously supported by the lead core column and the rubber steel plate spacing layer; the edge of the lower plate is also provided with a vertical limiting seat, and space allowance is reserved between the limiting seat and the rubber steel plate spacing layer.
The invention adopts the technical scheme to produce the beneficial effects that:
1. the invention respectively arranges a specific shock absorption and isolation structure between the reflector and the seat frame and between the seat frame and the foundation, thereby having good shock absorption and isolation functions on the antenna structure, particularly the reflector part.
2. The rubber steel plate spacing layer is limited through the lateral limiting seat, so that the rubber steel plate spacing layer has the largest lateral deformation, and the overturning caused by excessive deviation of the center from the support can be avoided.
3. The invention has simple and reliable structure form and is convenient to install and maintain.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
FIG. 2 is a schematic view of a rubber-isolated structure according to an embodiment of the present invention.
FIG. 3 is a schematic view of a damping structure of a friction pendulum according to an embodiment of the present invention
Fig. 4 is a schematic structural diagram of a large antenna used in the embodiment of the present invention.
Fig. 5 is a schematic view of the stabilizer structure of fig. 4.
Fig. 6 is a schematic structural view of the cable power plant of fig. 4.
Fig. 7 is a schematic view of the pitch accuracy control structure of fig. 4.
Fig. 8 is a schematic view of the pitch limiting structure of fig. 4.
In the figure: 1. a seat frame, 1.1, a roller, 1.2, a shaft seat, 2, a reflector, 3, a cable, 3.1 a cable power device, 3.2, a cable stress structure, 3.1.1, a motor reducer combination, 3.1.2, a winding drum, 3.1.4, a tension sensor, 3.1.5, a terminal, 4, a foundation, 4.1, a ring-shaped steel rail, 5, a cable stabilizing structure, 5.1, a pulley, 5.2, a tension sensor, 5.3, a terminal, 5.4, an elastic component, 6, a pitching precision control structure, 6.1, a meshing gear, 6.2, a small sector gear, 6.3, a ring-shaped code wheel, 7, a pitching limiting structure, 7.1, a main steel frame, 7.2, a buffer platform, 7.3, a buffer unit, 7.4, a locking mechanism, 8, a lead core, 9, a rubber steel plate, a spacing layer, 10, an upper plate, 11, a wrapping layer, 12, a limiting seat, 13, a sliding plate, 8.1, an upper seat, a lower plate, 8.2, a damping pin, a lower plate, 8.4, a damping pin, 8.5.5, a damping pin, a shear pin, 8, a damping pin, a stop block, 8.2, 8.7, a limiting wall, 14, an upper layer damping structure, 15, a middle layer damping structure, 16, a lower layer damping structure, 17 and a roller frame.
Detailed Description
The present invention will be further illustrated by the following embodiments. The following detailed description, of course, is merely illustrative of various aspects of the invention and is not to be construed as limiting the scope of the invention.
A large antenna with a combined shock insulation and absorption structure comprises a reflector, a seat frame bearing the reflector, an azimuth rotating structure, an upper-layer shock absorption structure, a middle-layer shock absorption structure and a foundation shock absorption structure; the azimuth rotating structure comprises a foundation and a roller carrier, wherein an annular steel rail is arranged on the foundation; the bottom of the roller carrier is provided with a roller which moves on the annular steel rail, and the roller drives the roller carrier to do circular motion on the annular steel rail; the upper layer shock absorption structure is located between the reflector and the seat frame, the middle layer shock absorption structure is located between the roller carrier and the seat frame, and the foundation shock absorption structure is located at the bottom of the foundation.
Furthermore, the azimuth rotating structure also comprises dampers which correspond to the rollers one by one; and two ends of the damper are respectively connected to the rotating shaft of the roller and the bottom of the roller frame.
Further, the damper is a steel damper, a mild steel shear damper or a hydraulic viscous damper.
Further, the upper layer damping structure, the middle layer damping structure and the foundation damping structure are respectively a friction pendulum damping structure, a rubber shock insulation structure or any combination of the friction pendulum damping structure and the rubber shock insulation structure.
Furthermore, the friction pendulum damping structure is a simple pendulum structure or a compound pendulum structure.
Furthermore, the friction pendulum damping structure comprises an upper seat plate, a damping pendulum and a lower seat plate which are sequentially arranged from top to bottom; the bottom surface of the upper seat plate and the bottom surface of the damping pendulum are both smooth convex surfaces, the top surface of the damping pendulum and the top surface of the lower seat plate are both smooth concave surfaces, and the smooth concave surfaces and the smooth convex surfaces are respectively in one-to-one correspondence; the top of the lower seat plate is also provided with a shock insulation stop block, and the shock insulation stop block and the lower seat plate are fixed through a shear pin bolt perpendicular to the shock insulation stop block and the lower seat plate; the shock absorption pendulum is positioned in an area formed by the shock insulation stop block, and the shock absorption pendulum is tightly attached to the shock insulation stop block; the edge of the top of the lower seat plate is provided with a limiting wall for restricting the horizontal movement of the upper seat plate.
Further, the rubber shock insulation structure comprises an upper plate and a lower plate, the upper plate and the lower plate are parallel to each other, a lead core column perpendicular to the upper plate is arranged between the upper plate and the lower plate, and a rubber steel plate spacing layer is sleeved on the outer wall of the lead core column; the rubber steel plate spacing layer is a rubber layer and a steel plate layer which are sequentially overlapped, and the lead core column is perpendicular to the rubber layer and the steel plate layer; the upper plate is simultaneously supported by the lead core column and the rubber steel plate spacing layer; the edge of the lower plate is also provided with a vertical limiting seat, and space allowance is reserved between the limiting seat and the rubber steel plate spacing layer.
The following is a specific example:
as shown in fig. 4-8, a two-way cable-driven pitching motion type large radio telescope is adopted. The device has the characteristics of compact structure, high reliability, lower cost, convenience in maintenance and the like.
The present embodiment mainly comprises a seat frame 1, a reflector 2, a cable 3 and a cable driving device.
The seat frame is a large space steel frame structure. A group of roller 1.1 mechanisms are arranged at the bottom of the device, so that the direction rotation function of the device can be realized; two pitching shaft seats 1.2 are arranged at the upper part of the reflector, are used for supporting the reflector and are matched with the reflector to realize pitching rotation relative to a pitching shaft (which can be regarded as a connecting line of the two pitching shaft seats).
The reflector comprises a reflecting surface and a space net rack for supporting the reflecting surface. The reflector is mounted on the mount and has rotational freedom. The lower part of the lifting mechanism is provided with a pitching shaft mechanism. The reflector is matched and connected with a pitching shaft seat of the seat frame, so that the reflector has a degree of freedom of rotation relative to the seat frame along the pitching shaft.
The reflector and mount configurations described above are arranged in a bi-directional symmetrical fashion, i.e. the telescope primary configuration is symmetrical when the reflector is pointing vertically upwards, both in the direction of the pitch axis and perpendicular to the pitch axis. The connecting line (pitch axis) between the two pitch axis seats on the seat frame is parallel to the ground; the optical axis of the reflector is perpendicular to and intersects with the pitching axis, and the pitching axis is also perpendicular to and intersects with the azimuth axis. This symmetrical configuration allows a rotational motion capability of the reflector with respect to the mount along the pitch axis that is reasonably bilaterally symmetrical.
The cable driving device mainly comprises a cable power device 3.1 and a cable stress structure 3.2. The cable driving device achieves the purpose of pitching motion of the reflector rotating towards the two sides of the pitching shaft to the same degree. The cable power devices are symmetrically arranged on two sides of the bottom of the seat frame. The cable power device adopts a winch structure with a motor servo and mainly comprises a motor speed reducer assembly 3.1.1, a winch drum 3.1.2, a cable 3 wound on the winch drum, a tension sensor 3.1.4, a terminal 3.1.5 and the like. The motor reducer combination drives the winding drum to rotate in the positive and negative directions, so that the rope wound on the winding drum is driven to extend or shorten. The tension sensor is used for monitoring whether the tension of the cable is uniform and in a reasonable range. Corresponding to the cable power device on the seat frame, the cable stress structure is arranged at the lower part of the reflector and is also symmetrically distributed at two sides. The cable power device and the cable stress structure are connected through a cable.
One or more cables are arranged. The plurality of cables corresponds to more than one cable drive device. The safety cables are arranged in the cables, so that tension is not mainly provided when the telescope is normally used, and the safety cables play a role in special conditions such as breakage of other cables and the like, so that the reflector can safely fall back to a stable posture under extreme conditions.
Furthermore, the device also comprises a foundation 4, wherein an annular steel rail 4.1 is arranged on the foundation and corresponds to the roller mechanism at the bottom of the seat frame, so that the seat frame can rotate on the annular steel rail.
Further, a stabilizer structure 5 is included. The cable stabilizer structure is mounted on the seat frame and is connected to the cable by means of a pulley 5.1 assembly at the projecting end, the cable and the projecting end being in contact via the pulley and not fixed in position. The cable stabilizing mechanism is provided with a tension sensor 5.2 for tension and extension length and a terminal 5.3 connected to the sensor at the extension end so as to adjust the uniformity of the tension of each cable in real time. For the multi-cord case, there is also an elastic component. The structure is similar to the constraint between high-altitude high-voltage electric wires and is used for limiting the position and the distance between a plurality of ropes near a cross section. In the pitching motion process, the relative angle and distance between the cables can be changed, and the elastic parts 5.4 such as springs are adopted to adjust different constraint points. The function of the cable stabilizing structure is to overcome the unfavorable conditions of abnormal cable shaking vibration and the like which can occur under the conditions of strong wind, equipment vibration and the like.
Furthermore, the pitch precision control mechanism also comprises a pitch precision control structure 6, wherein the pitch precision control structure is a small sector gear mechanism and mainly comprises a meshing gear 6.1 and a small sector gear 6.2. The small sector gear is reversely arranged at the bottom of the reflector, penetrates through the reflector and is coaxial with the pitching shaft; the meshing gear is arranged on the seat frame and meshed with the small sector gear, and a motor reducer assembly or a damping motor provides torque. In the pitching motion process of the reflector, the cable driving device generates huge pulling force to enable the reflector to rotate along the pitching axis, and meanwhile, the small sector gear mechanism generates certain reverse counter torque. By matching a positive moment and a negative moment, the pitching angle of the auxiliary reflector is accurately controlled, so that the pitching motion of the reflector is more stable. Meanwhile, the mechanism can also assist in outputting rotation data, such as an annular coded disc 6.3 fixed on a small sector gear, and can also play a certain braking role so as to be used for locking the pitching attitude of the reflector.
The pitch accuracy control structure is rigid in motion property relative to the cable drive, and the pitch accuracy control structure is flexible; in the sport literature, the two are respectively equivalent to a Xiucai and a Hercules, the main driving force in the pitching motion process is provided by the cable driving, and when the cable driving precision control capability is insufficient, the pitching precision control mechanism plays a role.
The pitch precision control mechanism may be a hydraulic or lead screw type servo control mechanism capable of precision control.
Further, the device also comprises a pitching limiting structure 7. The two pitching limiting structures are symmetrically arranged on two sides of the seat frame and respectively correspond to the pitching angle limits of the seat frame. The pitching limiting structure mainly comprises a main steel frame 7.1, a buffering platform 7.2, a buffering unit 7.3, a locking mechanism 7.4 and the like. The contact platform is positioned at the protruding end part of the main body steel frame, and the buffer unit and the locking mechanism are respectively arranged on the contact platform. When the pitching motion is fast to the limit position, the preset protruding position of the reflector firstly contacts the buffer mechanism of the pitching limiting device, and the reflector reaches the limit position and stops moving after the impact force and the speed of the reflector are buffered. The locking mechanism can at this time strongly and effectively lock the reflector.
In the example, the vertical direction of the reflector is 0 degree, and the pitching motion of about +/-85 degrees can be realized.
When the telescope observes on the sky, the roller mechanism on the seat frame rotates on the annular steel rail of the foundation, so that the azimuth motion of the whole telescope is realized; the cable driving device and various auxiliary mechanisms realize the pitching motion of the reflector. The azimuth and the pitching motion have the functions of acceleration, deceleration, positioning, braking and the like, and the two motions are matched with each other, so that the accurate pointing of the reflector is realized.
The pitching motion is completed by the cable driving devices on two sides. The hoisting drum of the cable driving device on one side recovers the cable while the cable is released on the other side, so that the pitching action of the reflector is realized, and the pitching posture of the reflector is realized through the reverse movement. In the limit condition of pitching motion, the reflectors are respectively positioned at the lowest angles at the two sides of the seat frame and correspond to the pitching limiting devices at each side, so that the safety of the telescope antenna at the limit angle is ensured.
Referring to fig. 1 to 3, the rubber shock insulation structure comprises an upper plate 10 and a lower plate 13, wherein the upper plate and the lower plate are parallel to each other, a lead core column perpendicular to the upper plate is arranged between the upper plate and the lower plate, and a rubber steel plate spacing layer is sleeved on the outer wall of the lead core column; the rubber steel plate spacing layer is a rubber layer and a steel plate layer which are sequentially overlapped, and the lead core column is perpendicular to the rubber layer and the steel plate layer; the upper plate is simultaneously supported by the lead core column and the rubber steel plate spacing layer; the edge of the lower plate is also provided with a vertical limiting seat, and space allowance is reserved between the limiting seat 12 and the rubber steel plate spacing layer 9.
In this embodiment, the reflector 1 is connected to two pitch axis seats. The bottom of the pitching shaft seat is respectively connected with a first rubber shock insulation structure which is an upper layer shock absorption structure. The first rubber shock insulation structure is arranged at the top of the seat frame; the azimuth rotating structure is placed on the foundation rail and can do rotary motion on the foundation rail. The upper part of the azimuth rotating structure is connected with the seat frame, and a friction pendulum damping structure which is a middle layer damping structure is arranged between the azimuth rotating structure and the seat frame.
In fig. 3, the friction pendulum damping structure comprises an upper seat plate, a damping pendulum and a lower seat plate which are arranged in sequence from top to bottom; the bottom surface of the upper seat plate and the bottom surface of the damping pendulum are both smooth convex surfaces, the top surface of the damping pendulum and the top surface of the lower seat plate are both smooth concave surfaces, and the smooth concave surfaces and the smooth convex surfaces are respectively in one-to-one correspondence; the top of the lower seat plate is also provided with a shock insulation stop block, and the shock insulation stop block and the lower seat plate are fixed through a shear pin 8.6 vertical to the shock insulation stop block and the lower seat plate; the shock absorption pendulum is positioned in an area formed by the shock insulation stop block, and the shock absorption pendulum is tightly attached to the shock insulation stop block; the edge of the top of the lower seat plate is provided with a limiting wall for restricting the horizontal movement of the upper seat plate. The maximum height of the shock insulation stop block is lower than that of the limiting wall, and the top of the upper seat plate is higher than the limiting wall; the side of the upper seat plate is provided with a downward extension which is positioned in an area formed by the limit wall and is restrained by the limit wall from moving outwards.
Damping sliding plates 8.4 used for reducing friction force are arranged between the upper seat plate 8.1 and the damping pendulum 8.3 and between the damping pendulum and the lower seat plate 8.2.
The roller damper arranged between the roller system and the lateral direction of the azimuth turntable can be a steel damper, a mild steel shear damper or a hydraulic viscous damper and the like.
Wherein, the limiting seat is fixed at the outer side of the lower seat plate, extends upwards for a certain height and is of a semi-open structure. The limiting seat can predict the maximum displacement direction according to the overall characteristics of the structure, and the thickness is increased in the direction to increase the distance or other measures are taken to improve the earthquake impact resistance in the direction.
In fig. 2, the lead frame mainly includes an upper plate, a lower plate, a lead core, a rubber steel plate spacing layer, an external wrapping layer, a limiting seat, and the like. The limiting seat is fixed on the outer side of the lower seat plate, extends upwards for a certain height and is of a semi-open structure. The limiting seat can predict the maximum displacement direction according to the overall characteristics of the structure, and the thickness is increased in the direction to increase the distance or other measures are taken to improve the earthquake impact resistance in the direction.
And a second rubber shock insulation structure is arranged at the bottom of the foundation.
In general, compared with the existing large telescope antenna, the structural form provided by the invention mainly differs from the traditional seat frame in that the traditional seat frame is split into a pitching seat frame and an azimuth turntable, and a cable-driven pitching motion structural form is adopted. Meanwhile, shock absorption and isolation mechanisms are respectively arranged between the pitching shaft seat and the pitching seat frame, between the pitching seat frame and the azimuth turntable and between the azimuth turntable and the roller system. And a roller damper is arranged laterally at the connection of the roller system and the azimuth turntable.
When no earthquake occurs or the earthquake is small, the shock absorption transition sections and the shock absorption mechanisms are equivalent to rigid supports and do not influence the normal use of the antenna. When the earthquake is large, each shock absorption transition section and each shock absorption mechanism can well play a shock insulation and shock absorption role, so that the antenna structure, particularly the reflector part, can be fully protected.
When no earthquake occurs or the earthquake is small, the rubber shock insulation structure is only equivalent to a fixed support transition section and does not influence the normal use of the antenna.
When a large earthquake occurs, the rubber shock insulation structure starts to play a role so as to consume energy generated by the earthquake. The lateral limiting seat in the rubber shock insulation support is used for limiting the maximum lateral deformation of the rubber steel plate spacing layer so as to avoid the possibility of overturning caused by excessive deviation of the center of gravity.
In general, compared with the traditional large telescope antenna, the main structure provided by the embodiment mainly divides the original seat frame into an azimuth rotating structure and a seat frame, and a rubber shock insulation structure with a specific structure is arranged between the azimuth rotating structure and the seat frame. Meanwhile, a rubber shock insulation structure with a specific structure is additionally arranged between the reflector and the seat frame.
The rubber shock insulation structure performs effective shock insulation and shock absorption protection on the whole antenna structure, particularly a reflector part which plays a telescope function to a certain extent, and has the characteristics of low cost and easiness in installation and maintenance.
It should be understood that the above description of the embodiments of the present patent is only an exemplary description for facilitating the understanding of the patent scheme by the person skilled in the art, and does not imply that the scope of protection of the patent is only limited to these examples, and that the person skilled in the art can obtain more embodiments by combining technical features, replacing some technical features, adding more technical features, and the like to the various embodiments listed in the patent without any inventive effort on the premise of fully understanding the patent scheme, and therefore, the new embodiments are also within the scope of protection of the patent.
Claims (7)
1. A large antenna with a combined shock insulation and absorption structure comprises a reflector, a seat frame bearing the reflector and an azimuth rotating structure, and is characterized by further comprising an upper layer shock absorption structure, a middle layer shock absorption structure and a foundation shock absorption structure; the azimuth rotating structure comprises a foundation and a roller carrier, wherein an annular steel rail is arranged on the foundation; the bottom of the roller carrier is provided with a roller which moves on the annular steel rail, and the roller drives the roller carrier to do circular motion on the annular steel rail; the upper layer shock absorption structure is located between the reflector and the seat frame, the middle layer shock absorption structure is located between the roller carrier and the seat frame, and the foundation shock absorption structure is located at the bottom of the foundation.
2. The large antenna with the combined seismic isolation and reduction structure as claimed in claim 1, wherein the azimuth rotating structure further comprises dampers corresponding to the rollers one to one; and two ends of the damper are respectively connected to the rotating shaft of the roller and the bottom of the roller frame.
3. The large antenna with the combined seismic isolation and reduction structure as claimed in claim 2, wherein the damper is a steel damper, a mild steel shear damper or a hydraulic viscous damper.
4. The large antenna with the combined shock-isolating and shock-absorbing structure as claimed in claim 1, wherein the upper shock-absorbing structure, the middle shock-absorbing structure and the foundation shock-absorbing structure are respectively a friction pendulum shock-absorbing structure, a rubber shock-isolating structure or any combination of the friction pendulum shock-absorbing structure and the rubber shock-isolating structure.
5. The large antenna with the combined seismic isolation and reduction structure as claimed in claim 4, wherein the friction pendulum damping structure is a simple pendulum structure or a compound pendulum structure.
6. The large antenna with the combined vibration-isolating and shock-absorbing structure as claimed in claim 5, wherein the friction pendulum shock-absorbing structure comprises an upper seat plate, a shock-absorbing pendulum and a lower seat plate which are arranged in sequence from top to bottom; the bottom surface of the upper seat plate and the bottom surface of the damping pendulum are both smooth convex surfaces, the top surface of the damping pendulum and the top surface of the lower seat plate are both smooth concave surfaces, and the smooth concave surfaces and the smooth convex surfaces are respectively in one-to-one correspondence; the top of the lower seat plate is also provided with a shock insulation stop block, and the shock insulation stop block and the lower seat plate are fixed through a shear pin bolt perpendicular to the shock insulation stop block and the lower seat plate; the shock absorption pendulum is positioned in an area formed by the shock insulation stop block, and the shock absorption pendulum is tightly attached to the shock insulation stop block; the edge of the top of the lower seat plate is provided with a limiting wall for restricting the horizontal movement of the upper seat plate.
7. The large antenna with the combined shock insulation and absorption structure as claimed in claim 4, wherein the rubber shock insulation structure comprises an upper plate and a lower plate, the upper plate and the lower plate are parallel to each other, a lead core column perpendicular to the upper plate is arranged between the upper plate and the lower plate, and a rubber steel plate spacing layer is sleeved on the outer wall of the lead core column; the rubber steel plate spacing layer is a rubber layer and a steel plate layer which are sequentially overlapped, and the lead core column is perpendicular to the rubber layer and the steel plate layer; the upper plate is simultaneously supported by the lead core column and the rubber steel plate spacing layer; the edge of the lower plate is also provided with a vertical limiting seat, and space allowance is reserved between the limiting seat and the rubber steel plate spacing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110716637.0A CN113300073A (en) | 2021-06-28 | 2021-06-28 | Large antenna with combined shock insulation and absorption structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110716637.0A CN113300073A (en) | 2021-06-28 | 2021-06-28 | Large antenna with combined shock insulation and absorption structure |
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| Publication Number | Publication Date |
|---|---|
| CN113300073A true CN113300073A (en) | 2021-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110716637.0A Pending CN113300073A (en) | 2021-06-28 | 2021-06-28 | Large antenna with combined shock insulation and absorption structure |
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| Country | Link |
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| CN (1) | CN113300073A (en) |
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