A super large antenna pitch driving mechanism

Abstract

The present application belongs to the technical field of antenna, and particularly relates to a super-large antenna pitching driving mechanism, which comprises a rotating mechanism for bearing the antenna pitching, the rotating mechanism being connected to the lower side of the antenna, the rotating mechanism comprising a support frame, a counterweight ring hinged to the support frame, the counterweight ring being connected with a traction cable for driving the antenna pitching, the traction cable being connected with a reel, the antenna being fixedly connected with the counterweight ring, and a plurality of rotating mechanisms being arranged, the traction cables of adjacent rotating mechanisms being driven by the same reel. The traction cables of adjacent rotating mechanisms are driven by the same reel, so that the adjacent counterweight rings are driven by the same reel, the synchronism is improved, the antenna is borne by the counterweight ring, the counterweight ring is hinged to the support frame, the counterweight ring balances the weight of the antenna, the length of the traction cable is reduced, the traction cable load is reduced, the deformation amount is reduced, and the service life of the traction cable is prolonged.

Description

Technical Field

[0001] This invention belongs to the field of antenna technology, specifically relating to a pitch drive mechanism for an ultra-large antenna. Background Technology

[0002] Parabolic cylindrical arc antennas are hundreds of meters long and tens of meters in diameter. In order to better perform astronomical observations, radar searches, and other tasks, these arc antennas need to have a certain angle adjustment capability to receive signals more effectively.

[0003] Currently, ultra-large antennas are generally equipped with slide rails, allowing the antenna to slide within the rails and thus adjust its angle. This method requires a large slide rail to cover the entire lateral span of the ultra-large antenna. The installation accuracy of the slide rail is not easy to guarantee, resulting in significant deviations in the sliding angles of the rotating mechanisms in different parts of the ultra-large antenna. In addition, the poor installation accuracy also results in greater frictional resistance between the antenna and the supporting slide rail, which shortens the lifespan of the steel wire rope used for traction. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides an ultra-large antenna pitch drive mechanism. By driving the traction cables of adjacent rotating mechanisms with the same spool, and supporting the antenna with a counterweight ring, the traction cable drives the counterweight ring, thereby reducing the length of the traction cable, which helps to reduce the deformation of the traction cable and improve its service life.

[0005] The specific technical solution adopted in this invention is as follows:

[0006] A large antenna pitch drive mechanism includes a rotating mechanism for carrying the antenna pitch. The rotating mechanism is connected to the lower side of the antenna. The rotating mechanism includes a support frame and a counterweight ring hinged to the support frame. The counterweight ring is connected to a traction cable for driving the antenna pitch. The traction cable is connected to a spool. The antenna is fixedly connected to the counterweight ring. Multiple rotating mechanisms are provided, and the traction cables of adjacent rotating mechanisms are driven by the same spool.

[0007] The rotating mechanism also includes a steering roller. The traction cable is led out from one end of the counterweight support ring and then led to the reel via the steering roller. The traction cable is wound around the reel at least once and then led out through the reel, passing through the steering roller and connecting to the other end of the counterweight support ring. The winding positions of the traction cables of the rotating mechanisms on adjacent sides on the reel are staggered.

[0008] The rotating mechanism also includes a steering roller. The reel is arranged between adjacent rotating mechanisms. The traction cable of one rotating mechanism is led out from one end of the counterweight ring of the rotating mechanism, wound around the steering roller, and led to the other end of the counterweight ring of the rotating mechanism on the other side.

[0009] The counterweight support ring has a semi-circular structure, including a crossbeam and a ring connected to the lower side of the crossbeam. The crossbeam is hinged to the support frame. The end of the traction cable is fixed to the crossbeam. The traction cable is wrapped around the side wall of the ring of the counterweight support ring by means of a limiting roller.

[0010] The counterweight support ring is also provided with a support seat. The support seats are arranged at equal intervals along the side wall of the ring. Two sets of limiting rollers are symmetrically arranged below the hinge point of the crossbeam. The support seats are respectively arranged on both sides of the ring. The traction cable is wrapped around the side wall of the counterweight support ring in a figure-eight shape with the help of the limiting rollers and the support seats on the ring.

[0011] The support base includes a support block fixedly connected to the ring portion of the counterweight support ring and a support shaft disposed between the support blocks. A pressure sensor is placed between the support shaft and the support block. The arc angle between the support shafts of two adjacent support bases and the center of the ring portion is α. The support base at the starting position on one side of the counterweight support ring is flush with the crossbeam. The arc angle between the support shaft of the support base at the starting position on the other side of the counterweight support ring and the center of the ring portion is α / 2.

[0012] The beneficial effects of this invention are:

[0013] This invention improves synchronization by driving the traction cables of adjacent rotating mechanisms with the same reel, and driving adjacent counterweight rings with the same reel. In addition, the antenna is supported by the counterweight rings, which are hinged with a support frame. This allows the counterweight rings to balance the weight of the antenna, reduce the length of the traction cable, help reduce the tensile load on the traction cable, reduce deformation, and improve the life of the traction cable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 for Figure 1 A schematic diagram of the side view;

[0016] Figure 3 This is a schematic diagram of the structure of Example 1;

[0017] Figure 4 for Figure 3 A diagram illustrating the direction of looking up;

[0018] Figure 5 This is a schematic diagram of the structure of Example 2;

[0019] Figure 6 for Figure 4 A diagram illustrating the direction of looking up;

[0020] Figure 7 This is a schematic diagram of the structure of Example 3;

[0021] Figure 8 This is a schematic diagram of the support structure;

[0022] In the attached diagram, 1 is the support frame, 2 is the counterweight ring, 3 is the traction cable, 4 is the reel, 5 is the steering roller, 6 is the limit roller, 7 is the support base, and 8 is the pressure sensor. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0024] Specific implementation examples Figure 1 and Figure 2 As shown, the present invention is an ultra-large antenna pitch driving mechanism, including a rotating mechanism for carrying the antenna pitch. The rotating mechanism is connected to the lower side of the antenna. The rotating mechanism includes a support frame 1 and a counterweight ring 2 hinged to the support frame 1. The counterweight ring 2 is connected to a traction cable 3 for driving the antenna pitch. The traction cable 3 is connected to a reel 4. The antenna is fixedly connected to the counterweight ring 2. Multiple rotating mechanisms are provided, and the traction cables 3 of adjacent rotating mechanisms are driven by the same reel 4.

[0025] This invention uses a support frame 1 and a counterweight support ring 2 hinged to the support frame 1. The counterweight support ring 2 bears the weight of the antenna and balances part of the antenna weight, thereby reducing the driving force of the traction cable 3. A drive motor is connected to the reel 4, which rotates to drive the traction cable 3 to pull the counterweight support ring 2. The traction cables 3 of adjacent rotating mechanisms are connected to the same reel 4, reducing the number of parts in the drive mechanism and improving the synchronization of adjacent rotating mechanisms. Compared with the transmission method using a drive shaft, this method saves the cost of an extra-large drive shaft, reduces manufacturing and installation difficulty, and improves on-site construction efficiency.

[0026] Specific embodiment 1, such as Figure 3 and Figure 4 As shown, the rotating mechanism also includes a steering roller 5. The traction cable 3 is led out from one end of the counterweight support ring 2 and then led to the reel 4 via the steering roller 5. The traction cable 3 is wound around the reel 4 at least once and then led out through the reel 4, passing through the steering roller 5, and connected to the other end of the counterweight support ring 2. The winding positions of the traction cables 3 on the reel 4 of the rotating mechanisms on adjacent sides are staggered.

[0027] like Figure 3 As shown, this embodiment provides an example of synchronous driving of three adjacent rotating mechanisms, wherein, as Figure 4 As shown, the traction cable 3 of the left rotating mechanism extends onto the reel 4, winds around it, and is then led back to the other side of the counterweight support ring 2. The traction cable 3 of the right rotating mechanism is similarly configured. Figure 4As shown, at one end of the scroll 4, there is also a traction cable 3 for the central rotating mechanism. On the scroll 4, there are separators between the traction cables 3 of different rotating mechanisms to separate the traction cables 3 of different rotating mechanisms, avoid them from getting tangled together, and ensure the motion accuracy.

[0028] The solution provided in this embodiment can achieve synchronous driving of at least two rotating mechanisms, which can be configured independently of each other, with flexible increase or decrease in quantity, and convenient and efficient installation.

[0029] With the addition of counterweight support ring 2 and traction cable 3, the use of large-sized parts in the original slide rail is reduced, and the use of traction cable 3 as a transmission component reduces the requirements for installation accuracy.

[0030] Specific embodiment 2, such as Figure 5 and Figure 6 As shown, the rotating mechanism also includes a steering roller 5. The reel 4 is arranged between adjacent rotating mechanisms. The traction cable 3 of one rotating mechanism is led out from one end of the counterweight ring 2 of the rotating mechanism, wound around the steering roller 5, and led to the other end of the counterweight ring 2 of the rotating mechanism on the other side.

[0031] like Figure 5 As shown, this embodiment provides a scheme in which adjacent rotating mechanisms share a traction cable 3. By having the traction cables 3 on both sides wound separately on the same reel 4, they avoid tangling with each other. The traction cables 3 on both sides are used in a cross manner, so that the deformation of the two sets of traction cables 3 is similar, which helps to improve control accuracy and avoid large deformation of the ultra-large antenna due to poor coordination accuracy of the rotating mechanism, thus helping to improve the safety of using the ultra-large antenna.

[0032] like Figure 6 As shown in the figure, this embodiment also provides a schematic diagram of three sets of rotating mechanisms connected in series. Similarly, on the opposite side of the counterweight ring 2 on one side, the traction cable 3 and the reel 4 are symmetrically arranged, so as to realize the series drive of more stages of rotating mechanisms. The drive motors of multiple reels 4 are linked by electronic control to make them rotate synchronously at the same speed, thereby driving the ultra-large antenna to achieve the adjustment of the pitch angle.

[0033] Specific embodiment 3, such as Figure 7 As shown, the counterweight support ring 2 has a semi-circular structure, including a crossbeam and a ring connected to the lower side of the crossbeam. The crossbeam is hinged to the support frame 1. The end of the traction cable 3 is fixed to the crossbeam. The traction cable 3 is wrapped around the side wall of the ring of the counterweight support ring 2 by means of the limiting roller shaft 6.

[0034] The counterweight support ring 2 is also provided with a support seat 7. The support seats 7 are arranged at equal intervals along the side wall of the ring. Two sets of limiting rollers 6 are symmetrically arranged below the hinge point of the crossbeam. The support seats 7 are respectively arranged on both sides of the ring. The traction cable 3 is wrapped around the side wall of the ring of the counterweight support ring 2 in a figure-eight structure with the help of the limiting rollers 6 and the support seats 7 arranged on the ring.

[0035] like Figure 8 As shown, the support base 7 includes a support block fixedly connected to the ring portion of the counterweight ring 2 and a support shaft disposed between the support blocks. A pressure sensor 8 is placed between the support shaft and the support block. The arc angle between the support shafts of two adjacent support bases 7 and the center of the ring portion is α. The support base 7 at the starting position on one side of the counterweight ring 2 is flush with the crossbeam. The arc angle between the support shaft of the support base 7 at the starting position on the other side of the counterweight ring 2 and the center of the ring portion is α / 2.

[0036] In this embodiment, the ring of the counterweight ring 2 is used as a counterweight, and the center of the ring is hinged. This position is set on the crossbeam. Since the ring is a semi-circular ring structure, the center of gravity of the ring is always below its hinge point during the pitch adjustment of the antenna, which plays a certain role in balancing the weight of the antenna and reducing the driving force of the traction cable 3.

[0037] By setting up a support base 7 and cooperating with the support shaft to reduce the friction between the traction cable 3 and the side of the counterweight ring 2, the support shaft has rotational freedom relative to the support block, further reducing the wear of the traction cable 3.

[0038] To monitor the position of the pitch adjustment of traction cable 3, such as Figure 8 As shown, by setting pressure sensor 8, the pressure of the current traction cable 3 relative to the support shaft is obtained. The support seats 7 are arranged in an arc array on the ring side of the counterweight ring 2. By obtaining the number of support seats 7 with current pressure, the current angle can be roughly determined. Combined with the angle parameters obtained by the level instrument set on the antenna, it is convenient to accurately control the angle. At the same time, by using the delay time of pressure generation after the spool 4 is rotated, the tension deformation of the traction cable 3 can be determined, which is convenient for determining the maintenance cycle. When the support seats 7 on both sides are symmetrically set, the traction cable 3 on both sides presses and cooperates with the support shaft on one side, and releases a support shaft on the other side simultaneously. When the support seats 7 on both sides are set according to the arc center angle a / 2 of the counterweight ring 2, the support seats 7 on both sides are asymmetrical, and the pressing and releasing of the traction cable 3 are misaligned. That is, after one side of the support shaft is pressed or released, the change of the next pressure sensor 8 can be obtained after passing the arc center angle a / 2. Compared with the previous method of rotating the arc center angle a, the monitoring accuracy is improved from the arc center angle a to the arc center angle a / 2 without increasing the number of sensors.

Claims

1. A pitch drive mechanism for an ultra-large antenna, comprising a rotating mechanism for carrying the antenna pitch, the rotating mechanism being connected to the lower side of the antenna, characterized in that: The rotating mechanism includes a support frame (1) and a counterweight ring (2) hinged to the support frame (1). The counterweight ring (2) is connected to a traction cable (3) for driving the antenna pitch. The traction cable (3) is connected to a spool (4). The antenna is fixedly connected to the counterweight ring (2). Multiple rotating mechanisms are provided. The traction cables (3) of adjacent rotating mechanisms are driven by the same spool (4). The rotating mechanism also includes one of the following structural forms AC: A. The rotating mechanism also includes a steering roller (5). The traction cable (3) is led out from one end of the counterweight support ring (2) and then led to the reel (4) via the steering roller (5). The traction cable (3) is wound around the reel (4) at least once and then led out through the reel (4), passing through the steering roller (5), and connected to the other end of the counterweight support ring (2). The winding positions of the traction cables (3) of the rotating mechanisms on adjacent sides on the reel (4) are staggered. B. The rotating mechanism also includes a steering roller (5). The spool (4) is arranged between adjacent rotating mechanisms. The traction cable (3) of one rotating mechanism is led out from one end of the counterweight ring (2) of the rotating mechanism, and after being wound around the steering roller (5), it is led to the other end of the counterweight ring (2) of the rotating mechanism on the other side. C. The counterweight support ring (2) has a semi-circular ring structure, including a crossbeam and a ring connected to the lower side of the crossbeam. The crossbeam is hinged to the support frame (1). The end of the traction cable (3) is fixed on the crossbeam. The traction cable (3) is wrapped around the ring side wall of the counterweight support ring (2) by means of the limiting roller shaft (6).

2. The ultra-large antenna pitch drive mechanism according to claim 1, characterized in that: The counterweight support ring (2) is also provided with a support seat (7). The support seats (7) are arranged at equal intervals along the side wall of the ring. The limiting roller (6) is symmetrically arranged in two sets below the hinge point of the crossbeam. The support seats (7) are respectively arranged on both sides of the ring. The traction cable (3) is wrapped in the side wall of the ring of the counterweight support ring (2) in a figure-eight structure with the help of the limiting roller (6) and the support seats (7) provided on the ring.

3. The ultra-large antenna pitch drive mechanism according to claim 2, characterized in that: The support base (7) includes a support block fixedly connected to the ring portion of the counterweight ring (2) and a support shaft disposed between the support blocks. A pressure sensor (8) is placed between the support shaft and the support block. The arc angle between the support shafts of two adjacent support bases (7) and the center of the ring portion is a. The support base (7) at the starting position on one side of the counterweight ring (2) is flush with the crossbeam. The arc angle between the support shaft of the support base (7) at the starting position on the other side of the counterweight ring (2) and the center of the ring portion is a / 2.

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