Dual-drive redundant transmission device for radar rotary table

Abstract

The utility model discloses a radar rotary table dual-drive redundant transmission device which comprises a slewing bearing and two drive mechanisms, the slewing bearing is arranged on a fixed base, each drive mechanism comprises a servo motor, a speed reducer, a drive gear, a shell, an electromagnetic clutch and a hoisting flange, the shell is cylindrical, and the electromagnetic clutch is arranged on the shell. The lower end is connected with a servo motor, the upper end is connected with a speed reducer, an internal cavity is used for installing an electromagnetic clutch, the upper end of the speed reducer is connected to a hoisting flange, and the hoisting flange is connected to the fixed base. Compared with a parallel driving mode that the clutch is installed at the output end of the speed reducer, the parallel driving mode that the clutch is installed at the output end of the motor is adopted, the clutch is small in rated torque, light in weight and low in cost, when the broken-down clutch is replaced, only the motor and the clutch need to be disassembled, and the maintenance time is short.

Description

Technical Field

[0001] This utility model relates to radar turntables, and more particularly to a dual-drive redundant transmission device for radar turntables. Background Technology

[0002] A radar turntable is a device that supports the antenna to detect targets, enabling the antenna to rotate and scan 360 degrees.

[0003] In the fields of air traffic control radar and field surveillance radar, radars are typically required to be on duty 24 hours a day, which necessitates ensuring the high reliability of the radar turntable.

[0004] Traditional dual-drive redundant transmission devices typically employ a parallel drive mode with the clutch installed at the output end of the reducer, such as... Figure 1 As shown.

[0005] When an overrunning clutch is installed at the output end of the reducer, in windy conditions, the antenna's rotational speed may exceed the motor's speed, causing the overrunning clutch to disengage. In this case, the antenna's azimuth angle cannot be controlled. Furthermore, using the overrunning clutch only allows the antenna to rotate in the forward direction, not the reverse.

[0006] To solve this problem, a new dual-drive redundant transmission device for radar status is urgently needed. Utility Model Content

[0007] The purpose of this invention is to provide a dual-drive redundant transmission device for a radar turntable to solve the drawbacks of installing an overrunning clutch at the output end of the reducer.

[0008] To address this, the present invention provides a dual-drive redundant transmission device for a radar turntable, comprising a slewing bearing and two drive mechanisms. The slewing bearing is mounted on a fixed base, and each drive mechanism includes a servo motor, a reducer, and a drive gear. The device is characterized by further including a housing, an electromagnetic clutch, and a lifting flange. The housing is cylindrical, with its lower end connected to the servo motor and its upper end connected to the reducer. Its internal cavity is used to install the electromagnetic clutch. The upper end of the reducer is connected to the lifting flange, and the lifting flange is connected to the fixed base.

[0009] Furthermore, the aforementioned electromagnetic clutch is a normally open jaw-type electromagnetic clutch.

[0010] Furthermore, the aforementioned drive mechanisms also include: a coupling, an adapter plate, and a shaft. The servo motor is connected to the stator end of the normally open jaw-type electromagnetic clutch via a plum blossom-shaped coupling and an adapter plate. The moving end of the normally open jaw-type electromagnetic clutch is coaxially mounted with the reducer via the shaft.

[0011] Furthermore, the upper section of the aforementioned shaft is mounted to the reducer via a flat key, the middle section is mounted to the moving end of the normally open jaw-type electromagnetic clutch via a flat key, and the lower section is supported on the adapter plate via a bearing.

[0012] Furthermore, observation windows are provided around the perimeter of the shell.

[0013] The beneficial effects of this utility model are:

[0014] 1. Compared with the traditional dual-machine hot backup redundancy device, the drive mechanism of this utility model has no distinction between primary and secondary, and can be switched at any time. Alternating use can extend the life of the drive mechanism, improve the reliability of the whole machine, and realize all-weather operation of the radar.

[0015] 2. This utility model adopts a parallel drive mode in which the clutch is installed at the output end of the motor. Compared with the parallel drive mode in which the clutch is installed at the output end of the reducer, the clutch has a smaller rated torque, lighter weight, and lower cost. When replacing a faulty clutch, only the motor and clutch need to be disassembled, and the maintenance time is shorter.

[0016] 3. This utility model adopts a normally open jaw-type electromagnetic clutch, which controls the opening and closing of the clutch through a DC 24V power supply. Compared with an overrunning clutch, it will not cause the antenna azimuth angle to be uncontrollable.

[0017] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 This is a schematic diagram of a dual-drive redundant transmission device for radar turntables in existing technology.

[0020] Figure 2 This is a schematic diagram of the dual-drive redundant transmission device for the radar turntable of this utility model.

[0021] Figure 3 This is a schematic diagram of the dual-drive redundant transmission device for the radar turntable of this utility model.

[0022] Figure 4 This is an exploded view of the dual-drive redundant transmission device for the radar turntable of this utility model.

[0023] Figure 5 This is a schematic diagram of the structure of a single transmission device of this utility model. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] Combined with reference Figures 2 to 5 The dual-drive redundant transmission device for radar turntable of this utility model includes a first drive mechanism 1, a second drive mechanism 2, and a slewing bearing 3.

[0026] The first drive mechanism 1, the second drive mechanism 2, and the slewing bearing 3 are all mounted on a fixed base, and the load (antenna) is mounted on the slewing bearing 3.

[0027] The first drive mechanism 1 includes: a servo motor 101, a plum blossom-shaped coupling 102, an adapter plate 103, a normally open electromagnetic clutch 104, a shaft 105, a housing 106, a J599 connector 107, a reducer 108, a lifting flange 109, and a drive gear 110.

[0028] The drive mechanism 2 includes: a servo motor 201, a plum blossom-shaped coupling 202, an adapter plate 203, a normally open electromagnetic clutch 204, a shaft 205, a housing 206, a J599 connector 207, a reducer 208, a lifting flange 209, and a drive gear 210.

[0029] The housing 206 is cylindrical, with observation windows around its perimeter. A servo motor 101 is connected to the lower end, and a reducer 208 is connected to the upper end. A normally open electromagnetic clutch 104 is installed in the internal cavity. The reducer 108 is mounted on a lifting flange 109. The lifting flange 109 is mounted on a fixed base.

[0030] In the first drive mechanism 1, the servo motor 101 is connected to the stator end of the normally open jaw-type electromagnetic clutch 104 via a plum blossom-shaped coupling 102 and an adapter plate 103. The upper section of the shaft 105 is coaxially mounted with the reducer 108, the middle section is connected to the moving end of the normally open jaw-type electromagnetic clutch 104 via a flat key, and the lower section is supported on the adapter plate 103 via a bearing.

[0031] The drive gear 110 is coaxially mounted with the reducer 108 via a flat key. The J599 connector 107 is connected to the output cable of the normally open jaw electromagnetic clutch 104. The clutch engagement and disengagement are controlled by a 24V power supply.

[0032] The second drive mechanism 2 is exactly the same as the first drive mechanism 1, and will not be described again here.

[0033] The two drive mechanisms operate in parallel, with one in active mode and the other in a cold backup state. When one drive mechanism fails, the other automatically switches to active mode, thereby improving the reliability of the device.

[0034] Specifically, there is no distinction between the first drive mechanism 1 and the second drive mechanism 2 working sequentially. Assuming that the drive mechanism 1 works first: the normally open jaw-type electromagnetic clutch 104 is energized, the teeth of the normally open jaw-type electromagnetic clutch 104 are engaged, the servo motor 101 is started, the drive gear 110 is driven to rotate, the drive gear 110 drives the slewing bearing 3 to rotate, and the antenna rotates accordingly.

[0035] When the drive mechanism 1 operates for too long or malfunctions, the system will de-energize the servo motor 101 and the normally open jaw-type electromagnetic clutch 104, causing the teeth of the normally open jaw-type electromagnetic clutch 104 to disengage. Then, the normally open jaw-type electromagnetic clutch 204 will be energized, causing the teeth of the normally open jaw-type electromagnetic clutch 204 to engage, starting the servo motor 201, which drives the drive gear 210 to rotate. The drive gear 210 drives the slewing bearing 3 to rotate, and the antenna rotates accordingly.

[0036] When an electromagnetic clutch is installed at the output end of a reducer, due to the high torque at the reducer's output end, a high-torque electromagnetic clutch is usually required. The higher the rated torque, the larger and heavier the electromagnetic clutch becomes, increasing the cost. Replacing a faulty clutch requires disassembling the motor, reducer, and clutch simultaneously, resulting in a lengthy repair process. This invention allows for clutch removal and repair only by disassembling the motor.

[0037] The above description is merely an embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dual-drive redundant transmission device for a radar turntable, comprising a slewing bearing and two drive mechanisms, wherein the slewing bearing is mounted on a fixed base, and each drive mechanism comprises a servo motor, a reducer, and a drive gear, characterized in that, It also includes the housing, electromagnetic clutch, and lifting flange. The housing is cylindrical, with its lower end connected to a servo motor and its upper end connected to a reducer. Its internal cavity is used to install an electromagnetic clutch. The upper end of the reducer is connected to a lifting flange, and the lifting flange is connected to the fixed base.

2. The dual-drive redundant transmission device for the radar turntable according to claim 1, characterized in that, The electromagnetic clutch is a normally open jaw-type electromagnetic clutch.

3. The dual-drive redundant transmission device for the radar turntable according to claim 2, characterized in that, Each drive mechanism also includes: a coupling, an adapter plate, and a shaft. The servo motor is connected to the stator end of the normally open jaw electromagnetic clutch via a plum blossom-shaped coupling and an adapter plate. The moving end of the normally open jaw electromagnetic clutch is coaxially mounted with the reducer via the shaft.

4. The dual-drive redundant transmission device for the radar turntable according to claim 3, characterized in that, The upper section of the shaft is mounted to the reducer via a flat key, the middle section is mounted to the moving end of the normally open jaw-type electromagnetic clutch via a flat key, and the lower section is supported on the adapter plate via a bearing.

5. The dual-drive redundant transmission device for radar turntable according to claim 1, characterized in that, The shell has observation windows around its cylindrical wall.

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