CN114597613B - Waveguide switch and microwave heating system - Google Patents
Waveguide switch and microwave heating system Download PDFInfo
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- CN114597613B CN114597613B CN202011415118.2A CN202011415118A CN114597613B CN 114597613 B CN114597613 B CN 114597613B CN 202011415118 A CN202011415118 A CN 202011415118A CN 114597613 B CN114597613 B CN 114597613B
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/10—Auxiliary devices for switching or interrupting
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- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
Abstract
The invention relates to the technical field of microwave transmission, in particular to a waveguide switch and a microwave heating system. The waveguide switch comprises a microwave stator and a microwave rotor, wherein the microwave stator is provided with a stator inner cavity, the microwave rotor is arranged in the stator inner cavity, and the microwave rotor comprises a first microwave rotor block, a second microwave rotor block and a reflecting mirror; the reflecting mirror is arranged between the first microwave rotor block and the second microwave rotor block, and is provided with a reflecting surface facing the side surface of the first microwave rotor block, the first microwave rotor block is provided with two mutually perpendicular microwave channels, one ends of the two microwave channels are staggered and communicated on the side surface of the first microwave rotor block facing the reflecting surface, and the other ends of the two microwave channels respectively form a waveguide port; grooves for transmitting microwaves are formed in the inner wall surfaces of the two microwave channels, and smooth wall surfaces are arranged at the intersection of the inner wall surfaces of the two microwave channels. By setting the staggered part of the inner wall surfaces of the two microwave channels as smooth wall surfaces, the ignition risk in the microwave transmission process is reduced, and the microwave transmission is ensured.
Description
Technical Field
The invention relates to the technical field of microwave transmission, in particular to a waveguide switch and a microwave heating system.
Background
The waveguide switch is an electromechanical integrated component for selecting a microwave signal transmission path, switching on/off of waveguide transmission energy or switching between channels according to requirements, and is commonly used for realizing switching between a microwave antenna and a water load channel, and the waveguide switch corresponds to different waveguide calibers according to different microwave signals. The electromechanical waveguide switch is usually a rotary switch, and structurally consists of a driving motor and a microwave system. The microwave system consists of a microwave rotor and a microwave stator, wherein a curved microwave channel is arranged in the microwave rotor, and a waveguide window is arranged at the periphery of the microwave stator. The microwave rotor is installed in the microwave stator through a bearing. A certain gap exists between the microwave rotor and the microwave stator, and the microwave rotor and the microwave stator can reciprocally rotate in the gap under the driving of the motor. If the curved channel is connected with some two waveguide windows, the two waveguide windows are in an on state, otherwise, the two waveguide windows are in an off state.
However, the existing waveguide switch waveguide transmission process is easy to generate a sparking phenomenon, and the microwave transmission and microwave heating efficiency are affected.
Disclosure of Invention
In order to solve the technical problems or at least partially solve the technical problems, the invention provides a waveguide switch and a microwave heating system which can reduce the risk of ignition and ensure the normal transmission of microwaves.
The invention provides a waveguide switch, comprising: a microwave stator having a stator cavity; the microwave rotor is arranged in the inner cavity of the stator and comprises a first microwave rotor block, a second microwave rotor block and a reflecting mirror; the reflector is arranged between the first microwave rotor block and the second microwave rotor block, and is provided with a reflecting surface facing the side surface of the first microwave rotor block, two mutually perpendicular microwave channels are arranged on the first microwave rotor block, one ends of the two microwave channels are staggered and communicated on the side surface of the first microwave rotor block facing the reflecting surface, and the other ends of the two microwave channels form waveguide ports respectively; grooves for transmitting microwaves are formed in the inner wall surfaces of the two microwave channels, and smooth wall surfaces are arranged at the intersection of the inner wall surfaces of the two microwave channels.
Optionally, grooves are arranged on the inner wall surface of the microwave channel along the direction perpendicular to the central axis of the microwave channel, the grooves arranged on the inner wall surfaces of the two microwave channels are intersected on angular bisectors which form an angle of 45 degrees with the central axes of the two microwave channels, and the grooves intersected on the angular bisectors are removed to form the smooth wall surface.
Optionally, a cooling component is installed on the microwave rotor, the cooling component comprises a heat conducting plate and a connecting piece fixedly connected with the heat conducting plate, the connecting piece is fixedly connected with one surface of the reflecting mirror, which is opposite to the reflecting surface, and the heat conducting plate is arranged at one end of the microwave rotor and is in contact with the reflecting mirror; the microwave stator comprises a hollow sealing outer cylinder and a sealing flange fixedly installed at one end of the sealing outer cylinder, a cooling pipe is installed on the sealing flange, and the cooling pipe passes through the sealing flange to be in contact with the heat conducting plate.
Optionally, a microwave absorbing sheet for absorbing microwaves is arranged on the inner side of the sealing flange.
Optionally, an exhaust pipe communicated with the inside of the sealing outer cylinder is installed on the sealing flange.
Optionally, the microwave rotor has a first end and a second end which are oppositely arranged, the first end of the microwave rotor is used for being connected with a driving motor, and the second end of the microwave rotor is provided with a bearing assembly; the bearing assembly comprises a rotating shaft plate, a bearing supporting plate and a pointer, wherein the rotating shaft plate is fixedly connected with the microwave rotor, the rotating shaft plate is arranged on the bearing supporting plate through the bearing, the bearing supporting plate is fixedly connected with the microwave stator, and the pointer is arranged on one side, facing away from the rotating shaft plate, of the bearing supporting plate and is fixedly connected with the rotating shaft plate; the microwave stator is provided with an observation window with a perspective area, the pointer is positioned in the perspective area, and the pointer rotates synchronously with the rotating shaft plate and the microwave rotor to indicate the rotating angle of the microwave rotor in real time.
Optionally, a position identifier for indicating the rotation angle of the microwave rotor is arranged on the observation window.
Optionally, the rotating shaft plate is provided with an axially extending inner core, the bearing support plate is provided with a mounting hole for the inner core to pass through, and the pointer is fixedly mounted on the inner core; the bearing comprises a deep groove ball bearing and a thrust bearing, the inner core is embedded into the deep groove ball bearing, and the rotating shaft plate faces towards the plate surface of the bearing supporting plate and is in bearing contact with the thrust bearing.
Optionally, a shaft sleeve is fixedly installed at the first end of the microwave rotor, and the shaft sleeve is used for connecting a motor shaft of the driving motor; and the first end of the microwave rotor is provided with a limiting ring, and the limiting ring is arranged at the periphery of the shaft sleeve and is used for axially limiting the microwave rotor.
The invention provides a microwave heating system, which comprises the waveguide switch in any embodiment.
Compared with the prior art, the technical scheme provided by the embodiment of the invention has the following advantages:
the waveguide switch and the microwave heating system provided by the embodiment of the invention are characterized in that the inner wall surfaces of the two microwave channels are provided with the grooves for transmitting microwaves, and the purpose of the grooves is to ensure the microwave transmission efficiency; the staggered part of the inner wall surfaces of the two microwave channels is a smooth wall surface, if the staggered part of the inner wall surfaces of the two microwave channels is also provided with the groove, the groove is staggered, the staggered groove is easy to cause a sparking phenomenon, microwave transmission is affected, the waveguide switch and a device applying the waveguide switch can be damaged, the staggered groove is changed into the smooth wall surface, the risk of sparking in the microwave transmission process can be reduced, and microwave transmission is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is an outside schematic view of a waveguide switch according to an embodiment of the present invention;
FIG. 2 is an inside schematic view of a waveguide switch according to an embodiment of the present invention;
FIG. 3 is an exploded view of a microwave rotor of a waveguide switch according to an embodiment of the present invention;
FIG. 4 is an enlarged partial schematic view of the microwave rotor at the groove intersections in an embodiment of the invention;
fig. 5 is a schematic view of a bearing assembly of a waveguide switch according to an embodiment of the present invention.
Wherein, 1-microwave stator, 11-sealed outer cylinder; 12-a viewing window; 13-sealing the flange; 14-cooling pipes; 15-external-butt-joint corrugated waveguide; 16-exhaust pipe;
2-a microwave rotor; 21-a first microwave rotor block; 211-microwave channels; 22-a second microwave rotor block; a 23-mirror; 24-cooling assembly; 241-a heat-conducting plate; 242-connectors; 25-shaft sleeve;
a 3-bearing assembly; 31-a rotating shaft plate; 32-bearings; 321-deep groove ball bearings; 322-thrust bearing; 33-bearing plate; 34-pointer;
4-limiting rings.
Detailed Description
In order that the above objects, features and advantages of the invention will be more clearly understood, a further description of the invention will be made. It should be noted that, without conflict, the embodiments of the present invention and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the invention.
Referring to fig. 1 and 2, fig. 1 is an outer schematic view of a waveguide switch according to an embodiment of the present invention, and fig. 2 is an inner schematic view of a waveguide switch according to an embodiment of the present invention. The waveguide switch of the embodiment of the invention comprises: a microwave stator 1 and a microwave rotor 2. Specifically, the microwave stator 1 has a stator cavity, and the microwave rotor 2 is disposed in the stator cavity. The microwave rotor 2 is provided with a microwave channel 211, and the microwave stator 1 is provided with waveguide windows (the number of the waveguide windows can be three as shown in fig. 1 or more). The microwave rotor 2 rotates relative to the microwave stator 1, so that when the microwave channel 211 on the microwave rotor 2 is communicated with two waveguide windows, the two waveguide windows are in a conducting state, and otherwise, the two waveguide windows are in a cut-off state, thereby realizing the microwave reversing function.
Referring to fig. 3, an exploded view of the microwave rotor 2 of the waveguide switch is shown. The microwave rotor 2 comprises a first microwave rotor block 21, a second microwave rotor block 22 and a reflecting mirror 23, wherein the first microwave rotor block 21 is in a semicircular shape and is a key component for microwave reversing, and two mutually perpendicular microwave channels 211 are arranged on the first microwave rotor block 21, namely, the two microwave channels 211 are in a right-angle state and provide channels for the incidence and emergence of microwaves from the outside; the reflecting mirror 23 is disposed between the first microwave rotor block 21 and the second microwave rotor block 22, and has a reflecting surface facing the side of the first microwave rotor block 21, where a planar copper mirror may be used as the reflecting mirror 23; one ends of the two microwave channels 211 on the first microwave rotor block 21 are staggered and communicated on the side surface of the first microwave rotor block 21 facing the reflecting surface of the reflecting mirror 23 (i.e. the side surface opposite to the semicircular cambered surface), and the other ends of the two microwave channels are respectively formed with waveguide ports, and the waveguide ports are used for aligning and communicating with waveguide windows on the microwave stator 1. Preferably, the central axes of the two microwave channels 211 and the reflecting surface of the reflecting mirror 23 form an angle of 45 degrees, so that the microwaves are reflected by the reflecting mirror 23, so that the microwaves are incident into the microwave rotor 2 through the waveguide port of one of the microwave channels 211, reflected by the reflecting mirror 23, and then emitted out of the microwave rotor 2 through the waveguide port of the other microwave channel 211.
The second microwave rotor block 22 is semi-circular in shape and is coupled (e.g., screwed) to the first microwave rotor block 21 to form a generally circular shape. The second microwave rotor block 22 mainly acts as a counterweight so that the center of gravity of the microwave rotor 2 is located at the geometric center thereof, preventing the eccentricity from decreasing the transmission accuracy when the microwave rotor 2 rotates. The side of the second microwave rotor block 22 facing the first microwave rotor block 21 is provided with a mounting groove, and the reflecting mirror 23 is arranged in the mounting groove and is fixedly connected (such as by screw connection) with the second microwave rotor block 22. This is achieved by fixing the first microwave rotor block 21, the second microwave rotor block 22 and the mirror 23 together to form the microwave rotor 2.
With continued reference to fig. 3, the inner wall surfaces of the two microwave channels 211 are provided with grooves for transmitting microwaves, so as to ensure the efficiency of microwave transmission; the intersection of the inner wall surfaces of the two microwave channels 211 is a smooth wall surface (e.g., region a and region b in fig. 4 are regions where grooves are provided, and region c is a smooth wall surface region). The staggered parts of the inner wall surfaces of the two microwave channels 211, namely the corners of the two microwave channels, if the corners are provided with the flutes, the flutes in the two microwave channels are staggered, the staggered flutes are easy to cause a sparking phenomenon, metal fragments are generated to influence microwave transmission, the waveguide switch and a device applying the waveguide switch can be damaged, and the staggered flutes are changed into smooth wall surfaces to reduce the risk of sparking in the microwave transmission process and ensure normal microwave transmission.
Referring to fig. 4, a schematic view of the microwave rotor 2 is shown in an enlarged partial view of the staggered positions of the flutes, the staggered positions of the flutes are smoothed, only the waves with interference at the transition positions are processed, and less power is sacrificed to obtain less possibility of ignition. Specifically, the grooves are arranged on the inner wall surfaces of the two microwave channels 211 along the direction perpendicular to the central axes of the microwave channels 211, the grooves arranged on the inner wall surfaces of the two microwave channels 211 intersect on an angular bisector which is approximately 45 degrees with the central axes of the two microwave channels 211, and the grooves intersecting on the angular bisector are removed to form a smooth inner wall surface, so that the risk of ignition in the microwave transmission process is reduced.
With continued reference to fig. 1, the microwave stator 1 is provided with at least three waveguide windows (three waveguide windows are shown) for aligned communication with waveguide ports on the microwave rotor 2. Each waveguide window is fixedly connected with an outer butt joint corrugated waveguide 15, the outer side of the outer butt joint corrugated waveguide 15 is used for being connected with a transmission line in vacuum, and the inner side of the outer butt joint corrugated waveguide 15 can be connected with the sealed outer barrel 11 of the microwave stator 1 in a welding mode to form a whole. When the waveguide switch works, the driving motor is used for driving the microwave rotor 2 to rotate, so that two waveguide ports of the microwave channel 211 on the first microwave rotor block 21 are communicated with different waveguide windows, and the microwave reversing function is realized. Specifically, the three waveguide windows may be respectively referred to as a first waveguide window, a second waveguide window and a third waveguide window, and when the microwave rotor 2 is in the first position, the two waveguide ports may be aligned with the first waveguide window and the second waveguide window, respectively, and the first waveguide window and the second waveguide window are in a conductive state through the microwave communication 211; when the microwave rotor 2 rotates to the second position, the two waveguide ports are aligned with the second waveguide window and the third waveguide window respectively, and the second waveguide window and the third waveguide window are communicated through the microwave channel 211 to be in a conducting state, so that the microwave reversing function is realized.
With continued reference to fig. 3, the microwave rotor 2 is provided with a cooling component 24, the cooling component 24 includes a heat conducting plate 241 and a connecting piece 242 fixedly connected with the heat conducting plate 241, and the connecting piece 242 is fixedly connected (such as screwed) with one surface of the reflecting mirror 23 opposite to the reflecting surface, so as to fix the cooling component 24 on the reflecting mirror 23 of the microwave rotor 2; the heat conducting plate 241 can be a copper plate, the heat conducting plate 241 is arranged at the first end of the microwave rotor 2, and one side plate surface of the heat conducting plate 241 is contacted with the reflecting mirror 23; with continued reference to fig. 1, the microwave stator 1 includes a hollow sealing outer cylinder 11 and a sealing flange 13 fixed at one end of the sealing outer cylinder 11, a cooling tube 14 is installed on the sealing flange 13, the cooling tube 14 passes through the sealing flange 13 to contact with a heat conducting plate 241, and the cooling tube 14 can be a cooling copper tube, so that a part of heat is led out by the heat conducting plate 241 and the cooling tube 14, and the microwave stator is used for cooling and dissipating heat of the waveguide switch, so that the temperature of the waveguide switch is reduced, and the normal operation of the waveguide switch is ensured.
Further, a microwave absorbing sheet (not shown) for absorbing microwaves is disposed on the inner side of the sealing flange 13, specifically, a silicon carbide microwave absorbing sheet may be used, and the microwave absorbing sheet may be adhered to the inner side of the sealing flange 13 in an adhesive manner, and the microwave absorbing sheet is disposed corresponding to the heat conducting plate 241. Because the installation mode leads to the clearance between microwave rotor 2 and the stator inner chamber, cause microwave leakage, in order to prevent microwave from causing waveguide switch's local high temperature at stator inner chamber internal reflection, set up the microwave absorption piece in sealing flange 13's inboard, install the microwave absorption piece additional in the top of heat conduction board 241 promptly and absorb the microwave, prevent waveguide switch's local high temperature, ensure waveguide switch normal operating.
With continued reference to fig. 1, the sealing flange 13 is provided with an air suction pipe 16 communicating with the inside of the sealing outer cylinder 11, and the orifice of the air suction pipe 16 is formed as an air suction opening. Specifically, a mounting through hole is provided in the sealing flange 13, and an exhaust pipe 16 for exhausting air is inserted at the mounting through hole. Because the internal space of the waveguide switch is relatively narrow, the pumping time is too long under the condition of vacuum pumping, and in order to accelerate the pumping efficiency, a pumping hole is independently arranged on the microwave stator 1. The air in the sealed outer cylinder 11 of the microwave stator 1 is pumped out through the pumping hole, so that the inside of the sealed outer cylinder 11 is in a vacuum state, and microwave transmission in the vacuum state is beneficial to reducing the risk of ignition.
Referring to fig. 2, the microwave rotor 2 has a first end and a second end which are disposed opposite to each other, the first end of the microwave rotor 2 is used for being connected to a driving motor (not shown) to drive the microwave rotor 2 to rotate by using the driving motor, so as to realize a microwave reversing function, and the second end of the microwave rotor 2 is provided with a bearing assembly 3.
Referring to fig. 5, a schematic view of a bearing assembly 3 of a waveguide switch according to an embodiment of the present invention is shown. The bearing assembly 3 comprises a rotating shaft plate 31, a bearing 32, a bearing support plate 33 and a pointer 34, wherein the rotating shaft plate 31 is fixedly connected with the microwave rotor 2, the rotating shaft plate 31 is installed on the bearing support plate 33 through the bearing 32, the bearing support plate 33 is fixedly connected with the microwave stator 1, the bearing support plate 33 can be specifically fixedly installed on the inner side of the sealed outer cylinder 11, and the pointer 34 is arranged on one side, facing away from the rotating shaft plate 31, of the bearing support plate 33 and is fixedly connected with the rotating shaft plate 31. Referring to fig. 1, a viewing window 12 having a perspective area is installed on a microwave stator 1, a pointer 34 is positioned in the perspective area of the viewing window 12, and the pointer 34 rotates synchronously with a rotating shaft plate 31 and a microwave rotor 2 to indicate the rotating angle of the microwave rotor 2 in real time.
By installing the bearing component 3 at the second end of the microwave rotor 2, on one hand, the bearing component 3 moves together with the microwave rotor 2 during microwave reversing to ensure that the microwave rotor 2 and the microwave stator 1 are concentric, avoid contact at the sealed outer cylinder 11, and simultaneously ensure the accuracy of microwave transmission as the axial limit (lower limit according to the direction shown in fig. 2) of the microwave rotor 2 due to friction loss moment; on the other hand, the bearing assembly 3 comprises a pointer 34 fixedly connected with the rotating shaft plate 31 and synchronously rotating, and the microwave stator 1 is correspondingly provided with an observation window 12 for observing the rotating angle of the pointer 34, and whether the rotating angle meets the requirement or not is conveniently checked manually in real time through the observation window 12 and the pointer 34, so that a monitoring effect is achieved, the microwave transmission angle is conveniently adjusted, and the microwave transmission precision is ensured.
In order to facilitate the knowing of the rotation angle of the microwave rotor 2 by intuitively observing the rotation angle of the pointer 34, the observation window 12 is provided with a position mark for indicating the rotation angle of the microwave rotor 2, so that the rotation angle of the microwave rotor 2 can be conveniently and intuitively known by observing the position mark indicated by the pointer 34. Specifically, the relative positions of the pointer 34 and the microwave rotor 2 may be debugged in advance, the pointer 34 rotates synchronously when the microwave rotor 2 rotates, a position mark may be made on the observation window 12 according to the one-to-one correspondence between the rotation angle of the microwave rotor 2 and the indication position of the pointer 34, for example, a position mark is made on the observation window 12 when the microwave channel on the microwave rotor 2 is communicated with different waveguide windows on the microwave stator 1, so when the waveguide switch works, the indication position of the pointer 34 can be observed through the observation window 12 to obtain the rotation angle of the microwave rotor 2, so as to judge the on-off condition of the waveguide switch.
With continued reference to fig. 5, the rotating shaft plate 31 is fixed to the microwave rotor 2 and rotates synchronously, meanwhile, the rotating shaft plate 31 has an axially extending inner core, the bearing support plate 33 is provided with a mounting hole for the inner core to pass through, the pointer 34 is fixedly mounted on the inner core, for example, the inner core is provided with external threads, one end of the pointer 34 is provided with a threaded hole, and one end of the pointer 34 provided with the threaded hole is sleeved on the inner core and connected with the inner core in a threaded manner; the bearing support plate 33 is provided with a mounting groove for placing the bearing 32, and the bearing 32 is matched with the rotating shaft plate 31 to form limit on the microwave rotor 2 after being placed; the bearing 32 is a two-type bearing, namely a thrust bearing 322 and a deep groove ball bearing 321, the inner core of the rotating shaft plate 31 is embedded into the deep groove ball bearing 321, and the rotating shaft plate 31 contacts the thrust bearing 322 towards the surface of the bearing support plate 33, so that the rotation transition between the bearing support plate 33 and the rotating shaft plate 31 is provided.
Referring to fig. 2 and 3, a shaft sleeve 25 is fixedly installed at a first end of the microwave rotor 2, the shaft sleeve 25 is used for connecting a motor shaft of a driving motor, and in particular, the motor shaft and the shaft sleeve 25 can adopt a matching structure that a motor shaft with a D-shaped section is inserted into the shaft sleeve 25 with a D-shaped section. In order to limit the axial movement of the microwave rotor 2, a limiting ring 4 is mounted at the first end of the microwave rotor 2, and the limiting ring 4 is arranged at the periphery of the shaft sleeve 25 and positioned in the sealing outer cylinder 11 for axially limiting the microwave rotor 2 (the upper limit is the direction shown in fig. 2). Specifically, the limiting ring 4 may be formed by two semicircular rings with 178 ° central angles, so that the limiting ring 4 is installed and assembled, and the two semicircular rings are directly placed on the inner side of the sealing outer cylinder 11 and the first end (the upper side of the microwave rotor 2 in the direction shown in fig. 2) of the microwave rotor 2 during installation, and used as the upper limit of the microwave rotor 2, and meanwhile, the relative sliding of the two semicircular rings can be ensured, so that the waveguide switch can smoothly rotate.
With continued reference to fig. 1, for ease of assembly, two ends of the seal outer cylinder 11 are welded with a seal flange (a first seal flange and a second seal flange, respectively), and the first seal flange and the second seal flange are formed integrally with the seal outer cylinder 11; the sealing flange 13 is fixedly connected (such as bolted) with the first sealing flange; the observation window 12 is fixedly connected (e.g. bolted) to the second sealing flange, and specifically, the observation window 12 may include a sealing flange plate and a transparent glass window disposed in a hollow area in the middle of the sealing flange plate, where the sealing flange plate is fixedly connected to the second sealing flange, and a perspective area is formed on the transparent glass window.
The embodiment of the invention also provides a microwave heating system which comprises the waveguide switch of any embodiment and has the beneficial effects of the waveguide switch of any embodiment, and the description is omitted here.
It should be noted that, the waveguide switch according to the embodiment of the present invention may be applied to other systems or devices employing microwave transmission, in addition to the microwave heating system described above, so long as the waveguide switch does not deviate from the design concept of the present invention, and all the waveguide switches are within the scope of the present invention.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A waveguide switch, comprising:
a microwave stator (1), the microwave stator (1) having a stator cavity; and
the microwave rotor (2) is arranged in the inner cavity of the stator, and the microwave rotor (2) comprises a first microwave rotor block (21), a second microwave rotor block (22) and a reflecting mirror (23);
the reflecting mirror (23) is arranged between the first microwave rotor block (21) and the second microwave rotor block (22) and is provided with a reflecting surface facing the side surface of the first microwave rotor block (21), two mutually perpendicular microwave channels (211) are arranged on the first microwave rotor block (21), one ends of the two microwave channels (211) are staggered and communicated on the side surface of the first microwave rotor block (21) facing the reflecting surface, and the other ends of the two microwave channels are respectively provided with a waveguide opening;
grooves for transmitting microwaves are formed in the inner wall surfaces of the two microwave channels (211), and smooth wall surfaces are arranged at the intersection of the inner wall surfaces of the two microwave channels (211);
the inner wall surfaces of the microwave channels (211) are provided with grooves along the direction perpendicular to the central axes of the microwave channels (211), the grooves arranged on the inner wall surfaces of the two microwave channels (211) are intersected on angular bisectors which form angles of 45 degrees with the central axes of the two microwave channels (211), and the grooves intersected on the angular bisectors are removed to form the smooth wall surface.
2. Waveguide switch according to claim 1, characterized in that the microwave rotor (2) is provided with a cooling assembly (24), the cooling assembly (24) comprises a heat conducting plate (241) and a connecting piece (242) fixedly connected with the heat conducting plate (241), the connecting piece (242) is fixedly connected with one surface of the reflecting mirror (23) facing away from the reflecting surface, and the heat conducting plate (241) is arranged at one end of the microwave rotor (2) and is in contact with the reflecting mirror (23);
the microwave stator (1) comprises a hollow sealing outer cylinder (11) and a sealing flange (13) fixedly arranged at one end of the sealing outer cylinder (11), a cooling pipe (14) is arranged on the sealing flange (13), and the cooling pipe (14) passes through the sealing flange (13) to be in contact with the heat conducting plate (241).
3. Waveguide switch according to claim 2, characterized in that the inner side of the sealing flange (13) is provided with a microwave absorbing sheet for absorbing microwaves.
4. Waveguide switch according to claim 2, characterized in that the sealing flange (13) is fitted with an extraction tube (16) communicating with the interior of the sealing outer cylinder (11).
5. Waveguide switch according to any of claims 1 to 4, characterized in that the microwave rotor (2) has a first end and a second end arranged opposite each other, the first end of the microwave rotor (2) being adapted to be connected to a drive motor, the second end of the microwave rotor (2) being provided with a bearing assembly (3);
the bearing assembly (3) comprises a rotating shaft plate (31), a bearing (32), a bearing supporting plate (33) and a pointer (34), wherein the rotating shaft plate (31) is fixedly connected with the microwave rotor (2), the rotating shaft plate (31) is installed on the bearing supporting plate (33) through the bearing (32), the bearing supporting plate (33) is fixedly connected with the microwave stator (1), and the pointer (34) is arranged on one side, facing away from the rotating shaft plate (31), of the bearing supporting plate (33) and is fixedly connected with the rotating shaft plate (31);
the microwave stator (1) is provided with an observation window (12) with a perspective area, the pointer (34) is positioned in the perspective area, and the pointer (34) rotates synchronously with the rotating shaft plate (31) and the microwave rotor (2) to indicate the rotation angle of the microwave rotor (2) in real time.
6. Waveguide switch according to claim 5, characterized in that the viewing window (12) is provided with a position indication for indicating the angle of rotation of the microwave rotor (2).
7. Waveguide switch according to claim 5, characterized in that the rotating shaft plate (31) has an axially extending inner core, the bearing bracket plate (33) is provided with a mounting hole for the inner core to pass through, and the pointer (34) is fixedly mounted on the inner core;
the bearing (32) comprises a deep groove ball bearing (321) and a thrust bearing (322), the inner core is embedded into the deep groove ball bearing (321), and the rotating shaft plate (31) is contacted with the thrust bearing (322) towards the plate surface of the bearing supporting plate (33).
8. Waveguide switch according to claim 5, characterized in that the first end of the microwave rotor (2) is fixedly fitted with a bushing (25), the bushing (25) being intended for connection to the motor shaft of the drive motor;
the first end of the microwave rotor (2) is provided with a limiting ring (4), and the limiting ring (4) is arranged on the periphery of the shaft sleeve (25) and used for axially limiting the microwave rotor (2).
9. A microwave heating system comprising a waveguide switch as claimed in any one of claims 1 to 8.
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