RU2456718C1 - Waveguide switch - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: switch body is equipped with an additional device consisting of a lever in the shape of a swinging arm (4) with a spring loaded plunger (5) interacting with the pin (15) mounted on a half-coupling with a grove (14) which half-coupling, is joined to the switch rotor (2); fixed on the output axle of the reducing gear (11) of the rotor swing drive are a cam (12) interacting with the miniature circuit breakers (7) and (8) and a half-coupling with a projection (13) which half-coupling is loosely joined to the rotor via the half-coupling with a grove (14) having a preset free stroke sufficient for connection/disconnection of the microwave energy source.

EFFECT: ensuring short circuit protection of the transmitter in the waveguide transmission line at the microwave energy switching moment.

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Description

The invention is intended to work as part of radar stations and, in particular, in microwave waveguide paths that connect the transmitter to the antenna.

The purpose of the waveguide switches is to transport microwave energy from the transmitter to an antenna device or to another device, for example, to a waveguide load (antenna equivalent).

Known waveguide switches in which the switching is carried out by means of a rotating rotor having a waveguide of a special shape and rigidly fixed in 2 positions in accordance with the task of switching (A.S. 741333 H01P / 2, US Pat. No. 2942208). In these devices, at the time of switching due to the time constant for switching microwave energy, a large K _st U (standing wave coefficient) occurs, i.e. there is the possibility of a short circuit in the waveguide path.

The closest technical solution is the switch, in which the drive is rigidly connected to the rotor of the switch, and in the extreme positions the rotor is held by a latch-stop (AS 227419 H01P 1/12). This switch, although it has a rotor lock in its extreme positions, in it, at the time of switching, the switched channels are blocked due to the time constant required to switch the microwave energy source. There is the possibility of a short circuit in the waveguide path (see figure 3).

The objective of the invention is to prevent a short circuit in the waveguide path when switching the waveguide channels in the switch, i.e. shutdown of microwave energy at the moment when the waveguide channels of the rotor and the switch housing are closed.

The essence of the invention lies in the introduction of the original mechanism of rotation of the rotor of the waveguide switch. For this, a lever in the form of a link with a spring-loaded plunger interacting with a pin mounted on a coupling half with a groove connected to the switch rotor is mounted on the axis of the switch on the switch housing.

A cam is mounted on the output axis of the gearbox (rotor rotation drive), which interacts with two microswitches, each of which first switches off the microwave energy source by switching the waveguide channels, and turns on the microwave energy source at the end of the channel switching. The cam is movably connected to the switch rotor through a coupling half with a protrusion and a coupling half with a groove, while the coupling half with a protrusion has free play relative to the coupling half with a groove of at least 30 ° before the switch rotor begins to move.

The design of the waveguide switch is shown in figure 1 (kinematic diagram), figure 2 (section AA position I and II in figure 1) and figure 3 (kinematic prototype diagram).

The waveguide switch (figures 1 and 2) consists of:

1. Switch housing

2. Switch rotor

3. The backstage axis

7. Microswitch

8. Microswitch

9. Emphasis

10. Emphasis

11. Reducer (rotor rotation drive)

12. Cam

13. The coupling half with a ledge

14. The coupling half with a groove

15. Pin

16. Waveguide windows

17. Curved waveguide channel

The waveguide switch consists of a housing 1 with waveguide windows 16, in which the rotor 2 rotates freely in ball bearings. On the housing 1, the axis of the link 3 is fixed, on which the lever, consisting of the link 4, plunger 5 and spring 6, microswitches 7 and 8, rotates freely. triggered when the rotor rotates to the extreme positions (I and II) 3 ° ... 7 ° to the stops 9 and 10, and the gearbox (rotor rotation drive) 11 with a cam 12 and a coupling half with a protrusion 13. On the rotor 2 having a curved waveguide channel 17 , the coupling half with a groove 14 and a pin 15 are strengthened.

In the coupling half 14, a groove is provided, which allows the coupling half to move freely with the protrusion 13 of at least 30 °.

The waveguide switch shown in figures 1 and 2, operates as follows. In the initial position (figure 2, AA position I), the waveguide windows 16 of the housing 1 are aligned with the curved waveguide channel 17 of the rotor 2. The rotor 2 is held on the abutment 9 by a lever consisting of a link 4, with a spring-loaded plunger 5, the compression force of the spring 6 which interacts with a pin 15 mounted on a coupling half with a groove. The microswitch 7 is in cooperation with the cam 12, mounted on the output axis of the gearbox (rotor rotation drive) 11.

The coupling half with the protrusion 13 is also fixed on the output axis of the gearbox 11, while its protrusion interacts with the groove of the coupling half 14, which is mounted on the axis of the rotor 2 and has a free play of at least 30 ° in the direction of switching channels (Fig. 1, arrow, direction of movement in channel switching side).

When applying voltage to the gear motor 11, its output axis begins to rotate in the direction of switching channels. Cam 12 goes out of interaction with microswitch 7, and a command is issued to turn off the microwave energy source. At this moment, the rotor 2 is held on the abutment 9 by a lever consisting of a link 4 with a spring-loaded plunger 5, the compression force of the spring 6 before the interaction of the protrusion of the coupling half 13, mounted on the axis of the gearbox 11, with the groove of the coupling half, mounted on the axis of the rotor 2, and having free play at least 30 °. Thus, during the rotation of the coupling half with the protrusion 13 at an angle of not less than 30 °, the rotor 2 is held at the stop 9, which ensures the disconnection of the microwave energy source and prevents the possibility of a short circuit in the waveguide path.

After the protrusion of the coupling half of the protrusion 13 by an angle equal to the free travel of at least 30 °, the coupling half with the protrusion interacts with the coupling half with the groove 14 and starts to rotate the rotor 2 of the waveguide switch in the direction of the stop 10, i.e. the process of switching channels occurs. In this case, to half the switching path, the gearbox 11 overcomes the compression force of the spring 6 acting on the pin 15 by the plunger 5.

After the rotor 2 has passed half the way, the action of the compressed spring 6 on the pin 15 by the plunger 5 is reversed and directed towards the movement of the rotor 2. The coupling half 14 with a groove mounted on the rotor 2 and having a groove that provides a free movement of at least 30 ° is rotated together with the rotor 2 under the action of the force exerted by the spring 6 on the plunger 5, interacting with the pin 15 mounted on the rotor 2, at a free-wheeling angle of at least 30 °. The rotor 2 stops at the stop 10 and two waveguide windows 16 on the housing of the switch 1 are combined with the waveguide channel 17 of the rotor 2 having a curved shape (figure 2, AA position II).

The cam 12, mounted on the output axis of the gearbox 11, interacts with the microswitch 8 for 3 ° ... 7 ° to stop the protrusion of the coupling half 13 in the groove of the coupling half mounted on the rotor 2, which is held on the stop 10 by a lever consisting of a link 4 with a spring the plunger 5, interacting with the pin 15 mounted on the rotor 2. The microswitch 8 gives the command to turn on the microwave energy source after combining the two waveguide windows 16 of the housing 1 with a curved waveguide channel 17 of the rotor 2, which prevents the possibility of a short circuit in the waveguide path.

The technical and economic effect of the invention is to prevent a short circuit in the waveguide path at the time of switching the waveguide channels connecting the microwave energy source to other high-frequency devices, which ensures higher reliability of the entire system.

Claims (1)

A waveguide switch comprising a housing with waveguide windows, a rotor having a curved waveguide channel, a rotor rotation drive gearbox and two microswitches electrically connected to a microwave energy source, characterized in that a lever is mounted on the switch housing, which consists of a link with a spring-loaded plunger, which interacts with a pin located on the coupling half with a groove connected to the rotor, and a cam interacting with microswitches and a floor are fixed on the output axis of the rotor drive of the rotor rotation drive ufta protrusion movably coupled to the rotor through a coupling half with a groove having a predetermined free travel sufficient to deactivate or activate the microwave energy source.

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