CN110706991A - External tuning mechanism suitable for mechanical tuning type magnetron - Google Patents
External tuning mechanism suitable for mechanical tuning type magnetron Download PDFInfo
- Publication number
- CN110706991A CN110706991A CN201910953551.2A CN201910953551A CN110706991A CN 110706991 A CN110706991 A CN 110706991A CN 201910953551 A CN201910953551 A CN 201910953551A CN 110706991 A CN110706991 A CN 110706991A
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- Prior art keywords
- shaft
- magnetron
- worm
- tuning
- drive
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
- H01J23/18—Resonators
- H01J23/20—Cavity resonators; Adjustment or tuning thereof
- H01J23/207—Tuning of single resonator
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
- H01J23/18—Resonators
- H01J23/20—Cavity resonators; Adjustment or tuning thereof
- H01J23/213—Simultaneous tuning of more than one resonator, e.g. resonant cavities of a magnetron
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- Control Of High-Frequency Heating Circuits (AREA)
Abstract
The invention discloses an external tuning mechanism suitable for a mechanical tuning magnetron, which comprises: the conversion shaft rotates to drive the self tuning shaft of the magnetron to rotate, so that the resonant frequency of the magnetron is adjusted; the driving motor is used for providing a power source to drive the conversion shaft to rotate; a controller for controlling the rotation of the driving motor; one end of the worm is connected with an output shaft of the driving motor, the other end of the worm is connected with the conversion shaft, and the rotation angle of the worm wheel is smaller than 360 degrees; and the angle sensor is used for detecting the rotation angle of the worm wheel and sending the rotation angle value to the controller. The tuning mechanism of the invention utilizes the worm gear transmission system to correspond the rotation turns of the tuning shaft of the magnetron to the rotation angle of the angle sensor, so that the controller can accurately control the rotation of the tuning shaft, the position of the tuning shaft of the magnetron is accurate, and the working performance of the magnetron is improved.
Description
Technical Field
The invention relates to the technical field of vacuum electronic devices. And more particularly to a mechanically tuned magnetron.
Background
Compared with other devices, the magnetron has obvious advantages in the aspects of tube shaping efficiency, use conditions, device size and the like, the high-power magnetron applied to the accelerator requires stable working frequency, and output microwave signals can be ensured to be at a certain required frequency point so as to meet the working requirements of the accelerator. The tuning device of the magnetron adds some movable frequency modulation elements in the resonant circuit, and realizes the tuning function by changing the equivalent capacitance of the load reaction in the resonant circuit. The existing magnetron tuning device has no mechanical limit, and the magnetron can be damaged when a control system fails to cause the out-of-control of a driving motor.
Disclosure of Invention
The invention aims to provide an external tuning mechanism suitable for a mechanical tuning magnetron, which is provided with a limit switch and an angle sensor, wherein the limit switch can protect tuning components in the magnetron, the adjusting range of the magnetron tuning shaft of a plurality of circles is converted into the adjusting range within 360 degrees through a worm gear transmission system, and the position of the magnetron tuning shaft is monitored in real time through the angle sensor, so that the precise control of the resonant frequency of the magnetron is realized.
According to one aspect of the present invention there is provided an external tuning mechanism suitable for use in a mechanically tuned magnetron, comprising:
the conversion shaft rotates to drive the self tuning shaft of the magnetron to rotate, so that the resonant frequency of the magnetron is adjusted;
the driving motor is used for providing a power source to drive the conversion shaft to rotate;
a controller for controlling the rotation of the driving motor;
one end of the worm is connected with an output shaft of the driving motor, the other end of the worm is connected with the conversion shaft, and the rotation angle of the worm wheel is smaller than 360 degrees;
and the angle sensor is used for detecting the rotation angle of the worm wheel and sending the rotation angle value to the controller.
Preferably, a transmission shaft is arranged at the central axis of the worm wheel, and one end of the transmission shaft is connected with the angle sensor through a coupler.
Preferably, the magnetron external coordination mechanism further comprises a limit switch connected with the controller, and the limit switch is used for controlling the rotation angle of the worm wheel to be less than 360 degrees.
Preferably, the two limit switches are arranged to limit the positive rotation and the negative rotation of the worm wheel respectively.
Preferably, the limit switch is fixedly arranged on the mounting frame close to the transmission shaft, and the transmission shaft is provided with a shifting lever for shifting the limit switch.
Preferably, a rotating shaft of the angle sensor is connected with a transmission shaft where the worm wheel is located through a coupler and can rotate together with the transmission shaft, and a housing of the angle sensor is fixedly arranged on the mounting frame.
Preferably, an output shaft of the driving motor is provided with a driving gear, one end of the worm is provided with a driven gear, and the driving motor drives the worm to rotate through the meshing of the driving gear and the driven gear.
The invention has the following beneficial effects:
the external tuning mechanism for the mechanical tuning magnetron converts the adjustment range of a plurality of turns of the tuning shaft of the magnetron into the adjustment range within one turn by using the worm gear transmission system, and monitors the position of the tuning shaft of the magnetron in real time through the angle sensor, thereby accurately controlling the resonant frequency of the magnetron and improving the performance of the magnetron; the limit switches arranged at the positive limit position and the negative limit position are used for mechanically limiting the tuning range, so that safe and reliable protection is provided for the tuning component of the magnetron, and the phenomenon that the tuning mechanism rotates beyond the range allowed by the magnetron to damage the magnetron due to the occurrence of problems in a control system is prevented.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 shows a schematic structural diagram of the present invention.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
Fig. 1 shows an embodiment of the external tuning mechanism of the present invention suitable for a mechanically tuned magnetron, comprising a drive motor 1, a controller, a worm gear 2, a worm 3, an angle sensor 4 and a switching shaft. The conversion shaft is arranged on the tuning shaft of the magnetron, and the tuning shaft of the magnetron is driven to rotate through the rotation of the conversion shaft so as to realize the adjustment of the resonant frequency of the magnetron.
In this embodiment, the controller sends a control signal to control the rotation of the driving motor 1. An output shaft of the driving motor 1 is connected with one end of the worm 3, the other end of the worm 3 is connected with a conversion shaft through a coupler, the conversion shaft is fixed on a tuning shaft of the magnetron, and the driving motor 1 can indirectly drive the tuning shaft to rotate so as to adjust the resonant frequency of the magnetron. Specifically, the end of the output shaft of the driving motor 1 is provided with a driving gear 11, one end of the worm 3 is provided with a driven gear 31, the other end of the worm 3 is provided with a coupler connected with the conversion shaft, and the driving gear 11 is meshed with the driven gear 31, so that the driving motor 1 can drive the conversion shaft to rotate through the worm 3, and further drive the tuning shaft to rotate.
Simultaneously, worm 3 and worm wheel 2 form speed reduction drive mechanism, and the central axis of worm wheel 2 is equipped with transmission shaft 21, and transmission shaft 21 passes through the shaft coupling to be connected with angle sensor 4 to worm 3 can drive angle sensor 4 and rotate. Because the effective working range of the angle sensor is within 360 degrees, the adjusting range of the rotation turns of the magnetron tuning shaft is converted into within one turn by setting a reasonable worm gear transmission ratio. The angle sensor 4 is connected with the controller and can send the rotation angle value of the worm wheel 2 to the controller. The tuning shaft of the magnetron has a certain rotation number limit, and the rotation number of the tuning shaft is set to be X circles in the embodiment, so that if the rotation number of the tuning shaft exceeds the limit, the internal tuning components of the magnetron can be damaged. The magnetron external tuning mechanism of the present invention can set the range of the number of rotations of the tuning shaft (set as Y-turns) within the limit of the number of rotations thereof (i.e. X > Y). The driving motor 1 drives the worm 3 to rotate through the gear meshing mechanism, and further drives the magnetron tuning shaft to rotate. Meanwhile, the worm 3 drives the worm wheel 2 to rotate at a transmission ratio i, so that the transmission shaft 21 of the worm wheel rotates, the transmission ratio i enables the rotation angle of the transmission shaft 21 of the worm wheel to be theta when the tuning shaft of the magnetron rotates for Y turns, wherein theta is less than 360 degrees, namely the rotation angle of the worm wheel 2 is less than one turn when the tuning shaft rotates for Y turns. When the transmission shaft 21 of the worm wheel rotates, the angle sensor 4 is driven to rotate through the coupler, so that the rotation angle of the worm wheel 2 can be measured.
The angle sensor 4 transmits the rotation angle value of the worm wheel 2 to the controller, and the controller can monitor the position of the magnetron tuning shaft in real time according to the rotation angle value and accurately control the resonant frequency of the magnetron. Thereby improving the operating performance of the magnetron. The tuning mechanism of the invention utilizes the worm gear transmission system to correspond the rotation turns of the tuning shaft of the magnetron to the rotation angle of the angle sensor 4, so that the controller can accurately control the rotation of the tuning shaft, the position of the tuning shaft of the magnetron is accurate, and the working performance of the magnetron is improved.
The tuning components are the weakest parts of the magnetron and can easily cause damage to the tuning components of the magnetron if the tuning shaft exceeds the rotational limit. This embodiment is further equipped with two limit switch 5, and limit switch 5 is close to transmission shaft 21 to fixed the setting on the mounting bracket, and two limit switch 5 correspond the extreme position of corotation and the reversal of worm wheel 2 respectively, and two limit switch 5 all are connected with driving motor's power supply system. The transmission shaft 21 is provided with two shifting rods corresponding to the limit switches 5 respectively, when the transmission shaft 21 rotates forwards or reversely until the shifting rods contact the limit switches 5, the shifting rods trigger the limit switches 5, the limit switches 5 directly cut off the power supply of the driving motor, so that the driving motor stops rotating, the conversion shaft stops rotating, and the tuning shaft stops rotating simultaneously. The position of the poking rod forward and reverse rotation triggering limit switch 5 is within the limit of the number of rotation turns of the tuning shaft of the magnetron, so that the tuning shaft is prevented from exceeding the limit of the number of rotation turns to cause damage to tuning components, and the magnetron is protected.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (7)
1. An external tuning mechanism for a mechanically tuned magnetron, comprising:
the conversion shaft rotates to drive the self tuning shaft of the magnetron to rotate, so that the resonant frequency of the magnetron is adjusted;
the driving motor is used for providing a power source to drive the conversion shaft to rotate;
a controller for controlling the rotation of the driving motor;
one end of the worm is connected with an output shaft of the driving motor, the other end of the worm is connected with the conversion shaft, and the rotation angle of the worm wheel is smaller than 360 degrees;
and the angle sensor is used for detecting the rotation angle of the worm wheel and sending the rotation angle value to the controller.
2. The external tuning mechanism for a mechanically tuned magnetron of claim 1 wherein said worm gear has a drive shaft at its central axis, one end of said drive shaft being connected to said angle sensor by a coupling.
3. The external tuning mechanism for a mechanically tuned magnetron of claim 2 further comprising a limit switch connected to said controller, said limit switch for controlling the rotation angle of said worm gear to less than 360 degrees.
4. An external tuning mechanism suitable for use in a mechanically tuned magnetron as claimed in claim 3 wherein said limit switches are provided in two to limit the forward and reverse rotation of said worm gear respectively.
5. The external tuning mechanism for a mechanically tuned magnetron of claim 3, wherein said limit switch is fixedly mounted on a mounting bracket proximate to said drive shaft, said drive shaft having a toggle lever for toggling said limit switch.
6. The external tuning mechanism for a mechanically tuned magnetron of claim 2, wherein said angle sensor has a rotating shaft connected to a drive shaft of said worm gear via a coupling and rotatable with said drive shaft, and wherein said angle sensor has a housing fixedly mounted to a mounting bracket.
7. The external tuning mechanism for a mechanically tuned magnetron as claimed in claim 1 wherein said drive motor has an output shaft with a drive gear and said worm shaft has a driven gear at one end, said drive motor driving said worm shaft to rotate by engagement of said drive gear with said driven gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910953551.2A CN110706991A (en) | 2019-10-09 | 2019-10-09 | External tuning mechanism suitable for mechanical tuning type magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910953551.2A CN110706991A (en) | 2019-10-09 | 2019-10-09 | External tuning mechanism suitable for mechanical tuning type magnetron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110706991A true CN110706991A (en) | 2020-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910953551.2A Pending CN110706991A (en) | 2019-10-09 | 2019-10-09 | External tuning mechanism suitable for mechanical tuning type magnetron |
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|---|---|
| CN (1) | CN110706991A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4748424A (en) * | 1986-03-15 | 1988-05-31 | Thorn Emi Varian Limited | Magnetron with frequency control means |
| JPH11111499A (en) * | 1997-10-01 | 1999-04-23 | Toshiba Corp | High freequency accelerating cavity and magnetron sputtering used for manufacturing the cavity |
| CN201738791U (en) * | 2010-05-27 | 2011-02-09 | 山东理工大学 | Mechanical transmission device for electric vehicle garage door |
| CN102595764A (en) * | 2012-03-13 | 2012-07-18 | 苏州爱因智能设备有限公司 | Automatic frequency control driving device for electronic linear accelerator |
| CN103681176A (en) * | 2013-10-28 | 2014-03-26 | 中国科学院电子学研究所 | Band-shaped beam klystron outer tuning apparatus |
| CN207843065U (en) * | 2018-02-08 | 2018-09-11 | 吉林大学 | A kind of steering wheel angle detection device |
-
2019
- 2019-10-09 CN CN201910953551.2A patent/CN110706991A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4748424A (en) * | 1986-03-15 | 1988-05-31 | Thorn Emi Varian Limited | Magnetron with frequency control means |
| JPH11111499A (en) * | 1997-10-01 | 1999-04-23 | Toshiba Corp | High freequency accelerating cavity and magnetron sputtering used for manufacturing the cavity |
| CN201738791U (en) * | 2010-05-27 | 2011-02-09 | 山东理工大学 | Mechanical transmission device for electric vehicle garage door |
| CN102595764A (en) * | 2012-03-13 | 2012-07-18 | 苏州爱因智能设备有限公司 | Automatic frequency control driving device for electronic linear accelerator |
| CN103681176A (en) * | 2013-10-28 | 2014-03-26 | 中国科学院电子学研究所 | Band-shaped beam klystron outer tuning apparatus |
| CN207843065U (en) * | 2018-02-08 | 2018-09-11 | 吉林大学 | A kind of steering wheel angle detection device |
Non-Patent Citations (1)
| Title |
|---|
| 柘江: "HM-J-16-Ⅰ型医用电子直线加速器自动频率控制系统", 《医疗装备》 * |
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Application publication date: 20200117 |
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