Multifunctional reusable rotary table

Abstract

The invention discloses a multifunctional reusable rotary table which comprises a rotary platform, a working bin and a ground foundation. A central pivot is arranged in the center of the rotating platform; the bottom of the central pivot is rotationally connected with the ground foundation, and the top is fixedly connected with the antenna skeleton to form a first main force transmission path of the turntable; the bin body framework of the working bin uniformly surrounds the central pivot and is fixedly connected with the central pivot; the roller combination of the rotating platform is connected with the end part of the bin body framework to form a second main force transmission path of the rotating platform; the roller combination can move along the track on the ground foundation; the bearing performance of the structure in the first main force transmission path and the bearing performance of the structure in the second main force transmission path are balanced; the working bin is divided into a plurality of areas by the radial bin body framework, and the antenna system equipment is divided according to functions and is reasonably arranged in the plurality of areas. According to the multifunctional reusable rotary table disclosed by the invention, the anti-overturning capability of the rotary table is improved, and the integration level of the system is high.

Description

Technical Field

[0001] The invention relates to the technical field of broadcast antennas, in particular to a multifunctional multiplexing turntable. Background Art

[0002] The shortwave broadcasting system is mainly composed of antenna system, transmitter system, RF transmission system, turntable, fire protection and security system, rotating grounding system, power distribution system, full-system intelligent monitoring system, etc. Among them, the transmitter system, RF transmission system, rotating system, fire protection and security system, rotating lightning protection and grounding system, power distribution system, antenna control system, environmental control system, full-system intelligent monitoring system, etc. are integrated and installed inside the turntable according to the system working requirements, and rotate synchronously with the turntable.

[0003] According to the literature, there are usually three types of rotating equipment layouts for large antenna systems: ① concrete building + rotating antenna; ② wheel-rail turntable + equipment cabin + antenna.

[0004] The "concrete building + rotating antenna" approach is to make the cylindrical antenna skeleton into a rotating form, that is, the transmission system, rotating joints, etc. are installed in the tube, and the bottom structure is only used as a supporting foundation. The advantages of this solution are high integration and low cost, but it also brings more disadvantages: a) The maintenance of the transmission system in the tube is poor; b) The RF transmission system, antenna control system, environmental control system and other equipment need to be installed on platforms at different heights in the tube, and debugging and maintenance are carried out by personnel climbing inside. The reliability is low, the operability is insufficient, the maintainability is poor, there is no ergonomics, the serial installation is serious, the construction period is long, and the integration of equipment in the tube virtually raises the center of gravity of the entire antenna system, reducing the system's anti-overturning ability.

[0005] The solution of "wheel-rail turntable + equipment cabin + antenna" is to use a wheel-rail turntable for rotation. The antenna system is rigidly connected to the turntable and rotates with the turntable. The transmitter system, RF transmission system, rotation system, fire protection and security system, rotation lightning protection and grounding system, power distribution system, antenna control system, environmental control system, and full-system intelligent monitoring system are installed in the equipment cabin on the turntable; some are to add simple buildings to the turntable for equipment installation. This layout method improves the anti-overturning ability, reduces the leakage risk equipment such as high-frequency rotating joints and low-frequency rotating joints, and improves the reliability of the system. However, due to the influence of discrete equipment cabins, the integration of the system is reduced; at the same time, due to the influence of the cabin or simple building structure, the shielding and protection capabilities of the equipment are insufficient. Summary of the invention

[0006] The technical problem to be solved by the present invention is that the existing rotating equipment layout of the antenna system cannot simultaneously meet the problems of strong anti-overturning capability and high system integration.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A multifunctional and multiplexed turntable includes a rotating platform 100, a working chamber 200 and a ground foundation 300; a central pivot 110 is arranged at the center of the rotating platform 100;

[0009] The bottom of the central pivot 110 is rotatably connected to the ground foundation 300, and the top is fixedly connected to the antenna frame 400, forming a first main force transmission path of the turntable; the warehouse frame 210 of the working warehouse 200 evenly surrounds the central pivot 110 and is fixedly connected thereto; and the roller assembly 120 of the rotating platform 100 is connected to the end of the warehouse frame 210, forming a second main force transmission path of the turntable; and the roller assembly 120 can move along the track on the ground foundation 300; and the structural bearing performance in the first main force transmission path and the second main force transmission path is balanced;

[0010] The radial warehouse frame 210 divides the working warehouse 200 into multiple areas, and the antenna system equipment is divided according to function and rationally arranged in multiple areas; the multiple areas include the transmitter equipment room, the RF transmission equipment room, the display and control hall and the comprehensive room.

[0011] Advantages: The main load-bearing structure of the turntable is integrated with the equipment installation. According to the characteristic that the load of the antenna system is concentrated on the central pivot of the turntable, the previous uniform distribution structure of the turntable load-bearing box beam is abandoned. The main load-bearing structure is composed of the central pivot and the four radial warehouse skeleton structures connected. Four groups of load-bearing rollers are installed at the ends of the four radial warehouse skeletons, and together with the central pivot, they bear the load of the entire antenna system.

[0012] Four radial warehouse frames arrange the square turntable into four main functional areas according to their functions: transmitter equipment room, RF transmission equipment room, display and control hall and comprehensive. The transmitter system, RF transmission system, rotation system, fire protection and security system, rotation lightning protection and grounding system, power distribution system, antenna control system, environmental control system and full system intelligent monitoring system are integrated and installed in the four functional areas according to the use requirements of the shortwave broadcasting system, which improves the reliability, maintainability and safety of the system.

[0013] In one embodiment of the present invention, the layout of the multiple areas is as follows:

[0014] The transmitter equipment room and the RF transmission equipment room are arranged adjacent to each other; on the one hand, the transmitting feed pipe between the equipment between the transmitter equipment room and the RF transmission equipment room can be shortened to reduce the transmission loss; on the other hand, there are electromagnetic shielding requirements between the transmitter equipment room and the RF transmission equipment room, and centralized shielding decoration can reduce the difficulty and cost of electromagnetic shielding and shorten the construction period.

[0015] The transmitter equipment room and the display and control hall are arranged opposite to each other; the equipment in the transmitter equipment room is the main source of electromagnetic radiation and noise, and the display and control hall is the main personnel activity and work area. The opposite arrangement can create a safer and more comfortable working environment.

[0016] The comprehensive room is adjacent to the transmitter equipment room and the display and control hall respectively; and the comprehensive room is divided into a power distribution room and a rest room; a pedestrian passage is set between the power distribution room and the rest room, and the power distribution room is adjacent to the transmitter equipment room, which is convenient for supplying power to the transmitter equipment room and the display and control hall, while reducing the difficulty of cable laying. The rest room is adjacent to the display and control hall, providing a resting place for staff during long daily work and nighttime missions.

[0017] A corridor is arranged with the central pivot 110 as the rotation center, and a plurality of areas are provided with a door interconnected with the corridor; and an elevator shaft is formed inside the central pivot 110, and an elevator leading to the antenna frame is provided, so that maintenance personnel can directly reach the cross arm on the tower through the elevator from the inside of the turntable, and then go to the antenna system to inspect the equipment thereon.

[0018] In one embodiment of the present invention, the outer wall of the work cabin 200 is detachable, and entrances and exits are reserved at the outer walls corresponding to the transmitter equipment room and the radio frequency transmission equipment room, so as to facilitate the installation and subsequent maintenance of large equipment; and two escape ladders are also arranged on the turntable, one leading to the bottom of the turntable and the other leading to the outside of the turntable. When a fire, typhoon or earthquake occurs suddenly, the staff in the display and control hall can be transferred to the safe area on the ground as quickly as possible.

[0019] In one embodiment of the present invention, the main beam structure of the rotating platform 100 is fixedly connected to the central pivot 110 and the warehouse frame 210 .

[0020] In one embodiment of the present invention, the roller assembly 120 is connected to the end of the bin frame 210 by using an adjustment base; and the bin frame 210 adopts a multi-partition design.

[0021] In one embodiment of the present invention, in order to achieve a balance in the structural bearing performance in the first main force transmission path and the second main force transmission path, a stiffness matching optimization design method based on key parameters is used to perform structural optimization, including the following steps:

[0022] S100, establishing an initial geometric model of the central pivot and the warehouse frame according to the function of the turntable, and establishing an initial finite element optimization model according to the initial geometric model;

[0023] S200, determining the load distribution target of the central pivot and the warehouse frame according to the mechanical analysis working condition;

[0024] S300, determining design variables according to the first main force transmission path and the second main force transmission path;

[0025] S400, obtaining an optimization target according to the load distribution target and the design variables; and analyzing the initial finite element optimization model according to the optimization target to obtain an initial discrete variable matrix of the optimization target;

[0026] S500, iteratively updating the initial finite element optimization model according to the initial discrete variable matrix to obtain a response matrix of the optimization target;

[0027] S600, using the least square method to perform optimal data fitting on the initial discrete variable matrix and the response matrix to obtain a response surface function model of the optimization target;

[0028] S700, determines the optimal design variable values ​​according to the response surface function model, updates the initial geometric model according to the optimal design variable values, and verifies it using finite element analysis, thereby achieving a reasonable distribution of the turntable's bearing performance.

[0029] In one embodiment of the present invention, the load distribution target includes: the bottom support force N1 of the central pivot 110, and the support force N2 of the connection position between the warehouse frame 210 and the roller assembly 120; the design variables include: the wall thickness V1 of the central pivot 110, the thickness V2 of the internal longitudinal reinforcement 211 of the warehouse frame 210, the thickness V3 of the internal transverse reinforcement 212 of the warehouse frame 210, and the thickness V4 of the steel plate of the outer skin 213 of the warehouse frame 210.

[0030] In one embodiment of the present invention, when the bottom support force N1 of the central pivot 110 is selected as the optimization target, the optimization target is: N1(V i )=(1±C)F1; wherein, i=1, 2, 3, 4; C is the allowable deviation coefficient; F1 is the support force designed for the bottom of the central pivot.

[0031] In one embodiment of the present invention, obtaining the initial discrete variable matrix of the optimization objective includes:

[0032] S410, if N1<(1-C)F1, the initial discrete variable matrix V obtained is:

[0033] S420, if N1<(1-C)F1, the initial discrete variable matrix V obtained is:

[0034] Among them, t is the discrete change.

[0035] In one embodiment of the present invention, the response surface function model with the bottom support force N1 of the central pivot 110 as the optimization target is: Where k0 is the fitting constant; k i is the response coefficient of the i-th design variable; V i is the ith design variable.

[0036] In one embodiment of the present invention, based on the target constraints between the bottom support force N1 of the central pivot 110 and the support force N2 at the connection position between the warehouse frame 210 and the roller assembly 120, as well as the stress constraints of the entire turntable system, a response surface function model of the support force N2 at the connection position between the warehouse frame 210 and the roller assembly 120 is obtained; and the initial geometric model is updated using the response surface function model of the two force distribution targets.

[0037] In one embodiment of the present invention, the target constraint condition is: stN1+N2=F2; the stress constraint condition is: S max (x i )≤230MPa,x i ∈D; where F2 is the total bearing capacity of the turntable; x i are the nodes at each position of the finite element model, D is the entire model domain; S max is the maximum stress.

[0038] In one embodiment of the present invention, the roller assembly 120 adopts a four-point layout, and a total of four groups of roller assemblies 120 are provided; each group of roller assemblies 120 includes an active roller 121, a driven roller 122 and a roller driving device 123; the roller driving device 123 is connected to the active roller 121 to provide power for the active roller 121, and the driven roller 122 moves in the same direction as the active roller 121; and the active roller 121 and the driven roller 122 are conical in shape.

[0039] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is applicable to ultra-high antenna frames, has a large turntable structure with strong anti-overturning ability, and adopts a central pivot bearing combination + surrounding roller assembly ground support to achieve a high reliability design.

[0040] The first main force transmission path of the present invention effectively transmits the load of the antenna frame on the top of the turntable to the ground through the center position, and the bearing seat at the connection between the center pivot and the ground foundation is connected to the ground by anchor bolts embedded in a cement seat, which greatly improves the overall stiffness and firmness of the antenna frame.

[0041] The second main force transmission path of the present invention connects the main bearing beam of the turntable platform to the warehouse frame by welding, so that the turntable's own load is evenly transmitted to the ground foundation through the second main force transmission path, ensuring the stable driving of the roller combination.

[0042] The structural stiffness matching optimization design method based on target load adjustment is adopted. By determining the target load distribution, adjusting the structural design parameters, and the specific process of finite element simulation verification, it is ensured that the strength of the final main load-bearing structure meets the material design requirements, the stiffness meets the accuracy requirements, and the combined load-bearing design of the center pivot and roller is reasonable.

[0043] In the structural stiffness matching optimization design method adopted, the fitting calculation efficiency and the accuracy of the optimization results are improved through the discrete design variable unidirectional control method.

[0044] The turntable with the equipment installed in one of the main load-bearing structures has abandoned the previous uniform distribution structure of the turntable load-bearing box beam according to the characteristic that the antenna system load is concentrated on the central pivot of the turntable. Its main load-bearing structure consists of a central pivot and 4 connected radial warehouse skeleton structures. In terms of spatial layout, on the one hand, the transmitting feed pipes between the transmitter equipment room and the RF transmission equipment can be shortened to reduce the transmission loss, and the shielding decoration can be concentrated to reduce the difficulty and cost of electromagnetic shielding and shorten the construction period; on the other hand, the transmitter equipment room and the display and control hall are arranged opposite to each other, which can create a safer and more comfortable working environment.

[0045] Four groups of load-bearing roller assemblies are evenly installed at the ends of four radial warehouse frames. Each group of roller assemblies is a driving wheel equipped with a driven wheel, thus ensuring the accuracy and stability of the transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 Schematic diagram of a turntable and antenna frame according to an embodiment of the present invention.

[0047] Figure 2 A schematic diagram of a multifunctional multiplexed turntable according to an embodiment of the present invention.

[0048] Figure 3 Schematic diagram of a roller assembly according to an embodiment of the present invention.

[0049] Figure 4 FIG. 4 is a schematic diagram of a layout of multiple regions according to an embodiment of the present invention.

[0050] Figure 5 Schematic diagram of an elevator according to an embodiment of the present invention.

[0051] Figure 6 Schematic diagram of a detachable exterior wall according to an embodiment of the present invention.

[0052] Figures 7 to 11 The figure is a schematic diagram of an escape ladder according to an embodiment of the present invention.

[0053] Fig.12 Schematic diagram of a roller assembly according to an embodiment of the present invention.

[0054] Fig.13 Schematic diagram of a semi-conical angle surface of a roller according to an embodiment of the present invention.

[0055] Fig.14 The present invention is a flowchart of structural optimization of the stiffness matching optimization design method of the turntable according to the embodiment of the present invention. DETAILED DESCRIPTION

[0056] To facilitate those skilled in the art to understand the technical solution of the present invention, the technical solution of the present invention is further described in conjunction with the accompanying drawings.

[0057] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0058] See also Figures 1 to 4 As shown, the present invention discloses a multifunctional and multiplexed turntable, including a rotating platform 100, a working chamber 200 and a ground foundation 300. A central pivot 110 is arranged at the center of the rotating platform 100, the bottom of the central pivot 110 is rotatably connected to the ground foundation 300, and the top is fixedly connected to the antenna frame 400, forming a first main force transmission path of the turntable. The chamber frame 210 of the working chamber 200 evenly surrounds the central pivot 110 and is fixedly connected thereto, and the roller assembly 120 of the rotating platform 100 is connected to the end of the chamber frame 210, forming a second main force transmission path of the turntable, and the roller assembly 120 can move along the track on the ground foundation 300, and the structural bearing performance in the first main force transmission path and the second main force transmission path is balanced.

[0059] The radial warehouse frame 210 divides the working warehouse 200 into multiple areas, and the antenna system equipment is divided according to function and reasonably arranged in multiple areas.

[0060] Specifically, the bottom of the central pivot 110 is connected to the ground foundation 300 by a bearing, and the top is directly connected to the antenna frame 400 by a flange, thereby constructing the first main force transmission path of the main structure, that is, directly transmitting to the ground foundation 300 through the central pivot 110. The central pivot 110 is welded to the warehouse frame 210 on all sides. The warehouse frame 210 adopts a multi-partition design, and the density and distribution of the plate are optimized based on the load conditions to ensure the rigidity of the structure. The main beam structure of the rotating platform 100 is welded to the central pivot 110 and the box warehouse frame 210 to ensure the load-bearing safety of the main working area.

[0061] The roller assembly 120 is connected to the end of the warehouse frame 210 by an adjustment base, thereby constructing a second main force transmission path of the main structure, that is, from the warehouse frame 210 and the roller assembly 120 to the ground foundation 300. Among them, the roller assembly 120 has its own drive motor to control the azimuth rotation of the entire turntable.

[0062] In this embodiment, the roller assembly 120 adopts a four-point layout, and a total of 4 groups of roller assemblies 120 are provided. Each group of roller assemblies 120 includes an active roller 121, a driven roller 122 and a roller driving device 123. The roller driving device 123 is connected to the active roller 121 to provide power for the active roller 121. The driven roller 122 moves in the same direction as the active roller 121, and the active roller 121 and the driven roller 122 are cone-shaped. Among them, the semi-cone angle surface of the active roller 121 and the driven roller 122 is 2.292°, as shown in FIG. Fig.12 and Fig.13 shown.

[0063] See also Figure 1 , Figure 2 , Figures 4 to 13 As shown, in one embodiment of the present invention, the multiple areas include a transmitter equipment room, a radio frequency transmission equipment room, a display and control hall, and a comprehensive room, and the layout of the multiple areas is as follows:

[0064] The transmitter equipment room and the RF transmission equipment room are arranged adjacent to each other. On the one hand, the transmission feed pipe between the transmitter equipment room and the RF transmission equipment room can be shortened to reduce transmission loss. On the other hand, there is an electromagnetic shielding requirement between the transmitter equipment room and the RF transmission equipment room. Centralized shielding decoration can reduce the difficulty and cost of electromagnetic shielding and shorten the construction period. Figure 4 shown.

[0065] The transmitter equipment room and the display and control hall are arranged opposite to each other. The equipment in the transmitter equipment room is the main source of electromagnetic radiation and noise, and the display and control hall is the main personnel activity and work area. The opposite arrangement can create a safer and more comfortable working environment.

[0066] The comprehensive room is adjacent to the transmitter equipment room and the display and control hall, and the comprehensive room is divided into a power distribution room and a rest room, and a pedestrian passage is set between the power distribution room and the rest room. The power distribution room is adjacent to the transmitter equipment room, which is convenient for supplying power to the transmitter equipment room and the display and control hall, while reducing the difficulty of cable laying. The rest room is adjacent to the display and control hall, providing a resting place for staff during long daily work and nighttime missions.

[0067] With the central pivot 110 as the rotation center, a corridor is set, and multiple areas are provided with a door interconnected with the corridor. An elevator shaft is formed inside the central pivot 110, and an elevator that can lead to the antenna frame is set. Specifically, the elevator is set up in multiple floors. Maintenance personnel can use the elevator to directly reach the cross arm on the tower from the inside of the turntable, and then to the antenna system to inspect the equipment on it, such as Figure 4 and Figure 5 shown.

[0068] See also Figure 1 , Figures 4 to 13 As shown, in one embodiment of the present invention, the outer wall of the work chamber 200 is detachable, and the outer walls corresponding to the transmitter equipment room and the radio frequency transmission equipment room are reserved with entrances and exits to facilitate the installation and subsequent maintenance of large equipment. Figure 6 As shown. There are two escape elevators on the turntable, one leading to the bottom of the turntable and the other leading to the outside of the turntable. When a fire, typhoon or earthquake occurs, the staff in the display and control hall can be transferred to the safe area on the ground as quickly as possible. Figures 7 to 11 In addition, an entrance hall door is provided at the end of the pedestrian passage, and double-sided stairs leading to the turntable are provided outside the entrance hall door, as shown in FIG. Figure 7 and Fig. 9 Specifically, a rotating lightning protection grounding device is arranged around the turntable to ensure reliable and safe grounding of the turntable when it rotates.

[0069] See also Figures 1 to 14 As shown, in one embodiment of the present invention, there are two main force transmission paths. In order to balance the structural bearing performance, a stiffness matching optimization design method based on key parameters is used to optimize the structure, including the following steps:

[0070] S100, establishing an initial geometric model of the central pivot and the warehouse frame according to the turntable function, and establishing an initial finite element optimization model according to the initial geometric model.

[0071] In this embodiment, the geometric model and the finite element optimization model are established in the ANSYS platform, for example.

[0072] S200, determining the load distribution target of the central pivot and the warehouse frame according to the mechanical analysis working condition.

[0073] In this embodiment, the load distribution targets include: the bottom support force N1 of the central pivot 110 and the connection position support force N2 of the bin frame 210 and the roller assembly 120 .

[0074] S300: Determine design variables according to the first main force transmission path and the second main force transmission path.

[0075] In this embodiment, the design variables include: the wall thickness V1 of the central pivot 110, the thickness V2 of the internal longitudinal ribs 211 of the warehouse frame 210, the thickness V3 of the internal transverse ribs 212 of the warehouse frame 210, and the steel plate thickness V4 of the outer skin 213 of the warehouse frame 210.

[0076] S400, obtaining an optimization target according to the load distribution target and the design variables; and analyzing the initial finite element optimization model according to the optimization target to obtain an initial discrete variable matrix of the optimization target.

[0077] In this embodiment, there are two load distribution targets, so firstly one load distribution target is selected as the optimization target, and the response analysis of the optimization target and the design variable is obtained, and then the response of the other load distribution target and the design variable is obtained according to the constraint conditions. Specifically, there is no priority order for selecting the two load distribution targets. In this embodiment, when the bottom support force N1 of the central pivot 110 is selected as the optimization target, the optimization target is: N1(V i )=(1±C)F1;where i=1,2,3,4;C is the allowable deviation coefficient, and F1 is the support force designed for the bottom of the central pivot. Wherein, the deviation coefficient is 0.05.

[0078] Obtaining an initial discrete variable matrix of the optimization objective includes:

[0079] S410, if N1<(1-C)F1, the initial discrete variable matrix V obtained is:

[0080] S420, if N1<(1-C)F1, the initial discrete variable matrix V obtained is:

[0081] Among them, t is the discrete change, which is generally taken as 1 according to the actual engineering design situation.

[0082] S500, iteratively updating the initial finite element optimization model according to the initial discrete variable matrix to obtain a response matrix of the optimization target.

[0083] S600, using the least square method to perform optimal data fitting on the initial discrete variable matrix and the response matrix to obtain a response surface function model of the optimization target.

[0084] Specifically, the response surface function model with the bottom support force N1 of the central pivot 110 as the optimization target is: Where k0 is the fitting constant; k i is the response coefficient of the i-th design variable; V i is the ith design variable.

[0085] S700, determines the optimal design variable values ​​according to the response surface function model, updates the initial geometric model according to the optimal design variable values, and verifies it using finite element analysis, thereby achieving a reasonable distribution of the turntable's bearing performance.

[0086] In this embodiment, there are two force distribution targets. Therefore, based on the target constraints between the bottom support force N1 of the central pivot 110 and the support force N2 at the connection position between the warehouse frame 210 and the roller assembly 120, as well as the stress constraints of the entire turntable system, a response surface function model of the support force N2 at the connection position between the warehouse frame 210 and the roller assembly 120 is obtained, and the initial geometric model is updated with the response surface function models of the two force distribution targets.

[0087] Specifically, the target constraint condition is: stN1+N2=F2; the stress constraint condition is: S max (x i )≤230MPa,x i ∈D; where F2 is the total bearing capacity of the turntable; x i are the nodes at each position of the finite element model, D is the entire model domain; S max is the maximum stress.

[0088] See also Figures 1 to 14 As shown, the present invention uses a high-power broadcast antenna, which has the main characteristics of a large array and heavy weight. It also has to overcome the impact of single or multiple severe weather conditions such as wind, rain, snow, ice and earthquakes, and especially withstands the damage to the antenna system caused by a high wind speed of nearly 55.5m / s. At this time, the antenna array is subjected to a horizontal wind force of up to 147.7KN. In order to avoid the large load from causing additional complex internal stress to the structure, it is necessary to achieve the three-center unity in theory, that is, the optimal wind moment center, center of gravity, and center of rotation of the antenna coincide. In addition, the force transmission form and path should be simplified as much as possible, with fewer transmission forms and shorter paths. In the specific design, the connection form of the rotating platform 100, the working chamber 200 and the ground foundation 300 ensures the consistency of the force direction of the roller assembly 120. The bin frame 210 can evenly transfer force to each roller assembly 120. In this solution, the first main force transmission path and the second main force transmission path divide the force into two forms: axial force and radial force. The vertical pressure of the axial force is borne by the roller assembly 120, and the radial force is mainly overcome by the center pivot 110. At the same time, the roller assembly 120 plays an anti-overturning role.

[0089] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

[0090] The above-described embodiments merely represent implementation methods of the invention. The protection scope of the present invention is not limited to the above-described embodiments. For those skilled in the art, several modifications and improvements may be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A multifunctional multiplexed turntable, characterized in that: It comprises a rotating platform (100), a working chamber (200) and a ground foundation (300); a central pivot (110) is arranged at the center of the rotating platform (100); The bottom of the central pivot (110) is rotatably connected to the ground foundation (300), and the top is fixedly connected to the antenna frame (400), forming a first main force transmission path of the turntable; the warehouse frame (210) of the working warehouse (200) evenly surrounds the central pivot (110) and is fixedly connected thereto; and the roller assembly (120) of the rotating platform (100) is connected to the end of the warehouse frame (210), forming a second main force transmission path of the turntable; and the roller assembly (120) can move along the track on the ground foundation (300); and the structural bearing performance in the first main force transmission path and the second main force transmission path is balanced; The radial warehouse frame (210) divides the working warehouse (200) into multiple areas, and the antenna system equipment is divided according to function and reasonably arranged in the multiple areas; the multiple areas include a transmitter equipment room, a radio frequency transmission equipment room, a display and control hall, and a comprehensive room.

2. The multifunctional multiplexing turntable according to claim 1, characterized in that: The layout of the multiple areas is as follows: The transmitter equipment room and the radio frequency transmission equipment room are arranged adjacent to each other; The transmitter equipment room and the display and control hall are arranged opposite to each other; The comprehensive room is adjacent to the transmitter equipment room and the display and control hall respectively; and the comprehensive room is divided into a power distribution room and a rest room; a pedestrian passage is provided between the power distribution room and the rest room, and the power distribution room is adjacent to the transmitter equipment room; A corridor is arranged with the central pivot (110) as the rotation center, and each of the multiple areas is provided with a door interconnected with the corridor; and an elevator shaft is formed inside the central pivot (110), and an elevator capable of leading to the antenna frame is arranged.

3. The multifunctional multiplexing turntable according to claim 2, characterized in that: The outer wall of the working chamber (200) is detachable, and entrances and exits are reserved at the outer walls corresponding to the transmitter equipment room and the radio frequency transmission equipment room; and two escape ladders are also arranged on the turntable, one leading to the bottom of the turntable and the other leading to the outside of the turntable.

4. The multifunctional multiplexing turntable according to claim 1, characterized in that: In order to achieve a balance in the structural bearing performance in the first main force transmission path and the second main force transmission path, a stiffness matching optimization design method based on key parameters is used to perform structural optimization, including the following steps: S100, establishing an initial geometric model of the central pivot and the warehouse frame according to the turntable function, and establishing an initial finite element optimization model according to the initial geometric model; S200, determining the load distribution target of the central pivot and the warehouse frame according to the mechanical analysis working condition; S300, determining design variables according to the first main force transmission path and the second main force transmission path; S400, obtaining an optimization target according to the load distribution target and the design variables; and analyzing the initial finite element optimization model according to the optimization target to obtain an initial discrete variable matrix of the optimization target; S500, iteratively updating the initial finite element optimization model according to the initial discrete variable matrix to obtain a response matrix of the optimization target; S600, using the least square method to perform optimal data fitting on the initial discrete variable matrix and the response matrix to obtain a response surface function model of the optimization target; S700, determines the optimal design variable values ​​according to the response surface function model, updates the initial geometric model according to the optimal design variable values, and verifies it using finite element analysis, thereby achieving a reasonable distribution of the turntable's bearing performance.

5. The multifunctional multiplexing turntable according to claim 4, characterized in that: The load distribution target includes: the bottom support force N1 of the central pivot (110), and the support force N2 of the connection position between the warehouse frame (210) and the roller assembly (120); the design variables include: the wall thickness V1 of the central pivot (110), the thickness V2 of the internal longitudinal reinforcement (211) of the warehouse frame (210), the thickness V3 of the internal transverse reinforcement (212) of the warehouse frame (210), and the thickness V4 of the steel plate of the outer skin (213) of the warehouse frame (210).

6. The multifunctional multiplexing turntable according to claim 5, characterized in that: When the bottom support force N1 of the central pivot (110) is selected as the optimization target, the optimization target is: N1(V i )=(1±C)F1; wherein, i=1, 2, 3, 4; C is the allowable deviation coefficient; F1 is the support force designed for the bottom of the central pivot.

7. The multifunctional multiplexing turntable according to claim 6, characterized in that: Obtaining an initial discrete variable matrix of the optimization objective includes: S410, if N1<(1-C)F1, the initial discrete variable matrix V obtained is: S420, if N1<(1-C)F1, the initial discrete variable matrix V obtained is: Among them, t is the discrete change.

8. The multifunctional multiplexing turntable according to claim 7, characterized in that: The response surface function model with the bottom support force N1 of the central pivot (110) as the optimization target is: Where k0 is the fitting constant; k i is the response coefficient of the i-th design variable; V i is the ith design variable.

9. The multifunctional multiplexing turntable according to claim 8, characterized in that: Based on the target constraint conditions between the bottom support force N1 of the central pivot (110) and the support force N2 at the connection position between the warehouse frame (210) and the roller assembly (120), as well as the stress constraint conditions of the entire turntable system, a response surface function model of the support force N2 at the connection position between the warehouse frame (210) and the roller assembly (120) is obtained; and the initial geometric model is updated using the response surface function model of the two force distribution targets.

10. The multifunctional multiplexing turntable according to claim 9, characterized in that: The target constraint condition is: stN1+N2=F2; the stress constraint condition is: S max (x i )≤230MPa,x i ∈D; where F2 is the total bearing capacity of the turntable; x i are the nodes at each position of the finite element model, D is the entire model domain; S max is the maximum stress.

11. The multifunctional multiplexing turntable according to claim 1, characterized in that: The roller assembly (120) adopts a four-point layout, and a total of four roller assemblies (120) are provided; each roller assembly (120) comprises a driving roller (121), a driven roller (122) and a roller driving device (123); the roller driving device (123) is connected to the driving roller (121) to provide power for the driving roller (121), and the driven roller (122) moves in the same direction as the driving roller (121); and the driving roller (121) and the driven roller (122) are in a cone shape.

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