circulator

Abstract

The present application relates to a circulator. The circulator comprises a shell, a center conductor, a gyromagnetic sheet and a permanent magnet are arranged in the inner cavity of the shell, the shell is matched with a cover plate for closing the opening of the inner cavity, an adjusting member is further arranged in the inner cavity, the adjusting member and / or the shell is provided with a retaining structure for retaining the adjusting member in the axial position of the inner cavity, and at least the gyromagnetic sheet is limited between the center conductor and the adjusting member. The present application has the advantages that the height of the inner cavity can be adjusted, the set position of the center conductor can be kept unchanged without replacing the shell, the shell and other components are universal and can be used in circulators with different performance requirements, and the number and thickness of the compensation sheets can be reduced, and the storage and transportation of the compensation sheets can be reduced.

Description

TECHNICAL FIELD

[0001] The application relates to a circulator. BACKGROUND

[0002] A low-intermodulation circulator with enhanced magnetic shielding is disclosed in Chinese Patent No. 202222766135.1, which comprises a shell, a cover plate and a connecting column. The shell has a medium ring, a first permanent magnet, a first magnetic conducting sheet, a first gyromagnetic sheet, a center conductor, a second gyromagnetic sheet, a second magnetic conducting sheet and a second permanent magnet placed in the shell from bottom to top. The cover plate is located above the second permanent magnet and is fixedly connected with the upper end of the shell. The circulator further comprises a temperature compensation sheet, which is arranged between the second permanent magnet and the cover plate and is in close contact with the second permanent magnet.

[0003] In the above-mentioned scheme, the shell is provided with an upward opening, and three accommodation grooves corresponding to the center conductor pins are arranged on the side wall of the shell. During the installation of the circulator, the medium ring, the first permanent magnet, the first magnetic conducting sheet, the first gyromagnetic sheet, the center conductor, the second gyromagnetic sheet, the second magnetic conducting sheet, the second permanent magnet and the temperature compensation sheet are sequentially placed in the inner cavity of the shell, and finally the components in the inner cavity are compressed and limited by the cover plate. In order to avoid the existence of gaps between the components in the inner cavity of the shell due to temperature changes, the above-mentioned scheme is provided with a temperature compensation sheet to ensure the compression of the components.

[0004] The thickness of the internal components of circulators with different performance requirements is different, and the setting position of the center conductor relative to the shell will change in height, which is not conducive to the connection of the pins and external joints or wires, especially the joints. The joints are fixed by fasteners fixed holes corresponding to each other between the joints and the shell. If the setting position of the center conductor deviates, the fastener fixed holes of the joints are difficult to align with the fastener fixed holes on the shell. Therefore, components with different thicknesses need to be matched with shells with different inner cavity heights.

[0005] Alternatively, compensation sheets are arranged on both sides of the center conductor, which are suitable for components with smaller thickness, but the number and types of compensation sheets required by this scheme are more. SUMMARY

[0006] The purpose of the present application is to provide a circulator with adjustable inner cavity height, which has high universality.

[0007] To achieve the above-mentioned purpose, the application adopts the following technical scheme: a circulator comprises a shell, a center conductor, a gyromagnetic sheet and a permanent magnet arranged in the inner cavity of the shell, a cover plate matched with the shell for closing the opening of the inner cavity, an adjusting member arranged in the inner cavity, and a retaining structure arranged on the adjusting member or / and the shell for retaining the adjusting member in the axial position of the inner cavity. At least the gyromagnetic sheet is limited between the center conductor and the adjusting member.

[0008] When the center conductor, the gyromagnetic sheet and the permanent magnet are set with different thicknesses due to different performance requirements, only the axial position adjustment of the adjusting member in the inner cavity of the shell is needed, so that the parts with different thicknesses (axial height) can be compressed or supported, so that the center conductor can be located at the set position of the shell, thereby facilitating the connection of the center conductor with the external wire or the joint and the assembly and fixation between the joint and the shell. By setting the adjusting member with adjustable axial position, the end position of the inner cavity is changed, the height of the inner cavity is adjusted, the set position of the center conductor can be conveniently realized without changing the shell, so that the shell and other parts have universality and can be used in circulators with different performance requirements. Meanwhile, the number and thickness of the compensation sheets can be reduced, the storage and transportation of the compensation sheets are reduced, and even the compensation sheets are not needed.

[0009] The adjusting member can be fixed with the shell by fasteners, such as a radially penetrating fixing hole is arranged on the side wall of the shell and cooperates with a bolt, the adjusting member is fixed between the adjusting member and the shell by screwing the bolt to press the side surface of the adjusting member; or the adjusting member has a plurality of fixing ends on the circumferential outer side, a plurality of mounting holes are arranged on the inner wall of the shell in the axial direction, and a long bolt passes through the fixing end to cooperate in the mounting hole, so that the axial position limiting and mounting of the adjusting member are realized.

[0010] As a preferred, the retaining structure is an inner thread structure arranged on the cavity wall of the inner cavity and an outer thread structure arranged on the outer wall of the adjusting member. The adjusting member is directly screwed with the shell, the structure is simple, the number of parts is less, and the position adjustment of the adjusting member is more convenient.

[0011] As a preferred, the outer end of the adjusting member is provided with a radially extending cooperation groove. The cooperation groove can cooperate with a screwdriver or the like, so that the rotation of the smaller adjusting member is facilitated, and the adjustment of the axial position of the adjusting member is facilitated.

[0012] As a preferred, the adjusting member is provided with a space for accommodating the permanent magnet in the axial direction. By arranging the space for accommodating the permanent magnet, the permanent magnet overlaps with the adjusting member, the shell of the present application can be arranged smaller, and the performance requirement of the permanent magnet is reduced. When the adjusting member has a space for accommodating the permanent magnet which opens to the side of the cover plate, there is a magnetic attraction force between the permanent magnet and the inner part, which can facilitate the positioning and cooperation between the adjusting member and the shell, and avoid the adjusting member from falling out of the shell. The adjusting member and the permanent magnet can be fixed by any existing method for fixing the permanent magnet and other parts, such as tight fit, glue fixing, etc., or can be compressed by the cover plate. When there is a gap between the cover plate and the permanent magnet, a thin thickness compensation sheet can be arranged, such as an aluminum sheet.

[0013] As preferred, the yielding space axially penetrates the adjusting member, and the adjusting member is annular. That is, the adjusting member of the present application is not pressed at the outer side of the permanent magnet in the axial direction, and the gap between the adjusting member and the permanent magnet will not cause the permanent magnet to be fixed unstably.

[0014] As preferred, a magnetic conducting sheet is further arranged in the inner cavity, and the magnetic conducting sheet is located between the adjusting member and the gyromagnetic sheet, and a positioning structure is arranged between the magnetic conducting sheet and the adjusting member. The positioning structure is arranged to avoid the deviation between the magnetic conducting sheet and the adjusting member, and to ensure the performance of the circulator.

[0015] As preferred, the positioning structure comprises a positioning groove arranged between the end face of the adjusting member and the end face of the magnetic conducting sheet, and a positioning protrusion extending into the positioning groove.

[0016] As preferred, the gyromagnetic sheet, the magnetic conducting sheet and the permanent magnet are coaxially arranged. The coaxial arrangement can make the performance of the circulator of the present application better.

[0017] As preferred, the gyromagnetic sheet, the permanent magnet, the adjusting member and the cover plate are arranged on both sides of the center conductor, the shell is composed of a first shell part and a second shell part, the first shell part and the second shell part are both provided with the inner cavity axially penetrating both ends, and the first shell part is provided with a through slot for the end part of the center conductor to extend out, or the second shell part is provided with a through slot for the end part of the center conductor to extend out. The through slot of the present application does not need to penetrate the shell in the axial direction, and can make the exposed part of the shell smaller. Meanwhile, the permanent magnets are arranged on both sides of the center conductor, and the shell can be made of non-magnetic material when the saturation requirement of the magnetization intensity is not high, so as to reduce the cost and avoid the short circuit of the magnetic circuit.

[0018] The present application has the advantages that the height of the inner cavity can be adjusted, the set position of the center conductor can be kept unchanged without replacing the shell, the shell and other parts can be universal, and can be used in circulators with different performance requirements; meanwhile, the present application has the advantages that the number and thickness of the compensation sheets can be reduced, and the storage and transportation of the compensation sheets can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 Fig. 4 is a structure diagram of the circulator of the present application without side plates and a cover plate.

[0020] Fig. 2 Fig. 5 is an explosion diagram of the circulator of the present application.

[0021] Fig. 3 Fig. 6 is an explosion diagram of the circulator of the present application without joints and side plates. DETAILED DESCRIPTION

[0022] The present application will be further described below according to the drawings and specific embodiments.

[0023] As shown in Figs. 1 to 3 The embodiment discloses a circulator, which comprises a shell composed of a first shell part 11 and a second shell part 12, the first shell part 11 and the second shell part 12 are both provided with an inner cavity axially penetrating through both ends, and the second shell part 12 is provided with a through slot 10 for the pin 21 end of the center conductor 2 to extend out near the first shell part 11, and the main body part of the center conductor 2 is located in the inner cavity. Wherein, the circulator of the embodiment is provided with a joint 3, the joint 3 is provided with a joint fastener fixing hole 31, and the shell is provided with a shell fastener fixing hole (not shown in the figure) aligned with the joint fastener fixing hole 31. The embodiment is provided with three joints 3, and the shell is square. The side wall of the shell without the joint 3 is provided with a side plate 13 made of a magnetically conductive material, and the side plate 13 can be fixed to the shell by fasteners, welding or glue.

[0024] The center conductor 2 is provided with a gyromagnetic sheet 4, a magnetically conductive sheet 5, a permanent magnet 6 and an adjusting part 7 on both sides, the end of the first shell part 11 away from the second shell part 12 and the end of the second shell part 12 away from the first shell part 11 are both provided with a cover plate 8 for closing the opening of the inner cavity; that is, one gyromagnetic sheet 4, one magnetically conductive sheet 5, one permanent magnet 6 and one adjusting part 7 are arranged in the inner cavity of the first shell part 11 and the inner cavity of the second shell part 12. Wherein, the center conductor 2, the gyromagnetic sheet 4, the magnetically conductive sheet 5, the permanent magnet 6 and the adjusting part 7 of the embodiment are coaxially arranged, and the gyromagnetic sheet 4 is fixed to the center of the end face of the magnetically conductive sheet 5 by glue.

[0025] The adjusting part 7 and the shell are provided with a retaining structure for retaining the adjusting part 7 in the axial position of the inner cavity, and the gyromagnetic sheet 4 and the magnetically conductive sheet 5 are limited between the center conductor 2 and the adjusting part 7. The retaining structure is an inner thread structure arranged on the cavity wall of the inner cavity and an outer thread structure arranged on the outer wall of the adjusting part 7, and the outer end (the end away from the center conductor) of the adjusting part 7 is provided with a matching groove 70 extending along the radial direction and penetrating through the opposite two side walls.

[0026] The adjusting part 7 is provided with a clearance space extending axially to accommodate the permanent magnet 6, and the clearance space axially penetrates through both ends of the adjusting part 7 to make the adjusting part 7 annular. The cross-sectional inner edge shape and size of the adjusting part 7 of the embodiment are the same as the cross-sectional outer edge shape and size of the permanent magnet 6. Wherein, the magnetically conductive sheet 5 and the adjusting part 7 are provided with a positioning structure matched with each other, the positioning structure comprises a positioning groove arranged between the end face of the adjusting part 7 and the end face of the magnetically conductive sheet 5 and a positioning protrusion 51 extending into the positioning groove, and the positioning groove of the embodiment is the opening of the clearance space. Wherein, the adjusting part 7 of the embodiment includes an adjusting part outer section 72 and an adjusting part inner section 71 along the axial direction, the outer wall of the adjusting part outer section 72 is provided with an outer thread structure, the outer diameter of the adjusting part inner section 71 is smaller than the outer diameter of the adjusting part outer section 72, and the opening of the adjusting part inner section 71 is used for cooperating with the positioning protrusion 51.

[0027] The circulator of the embodiment is provided with the connector, so when assembling the circulator, the fixing between the pin end of the center conductor and the connector (such as inserting the pin into the matching hole of the connector, or directly welding the pin and the connector) can be performed first, then the center conductor with the fixed connector is placed between the shell part one and the shell part two, and the fastener fixing between the connector and the shell part one and the shell part two is performed, so as to realize the fixing between the center conductor and the shell. Then one spin magnetic sheet is pasted in the middle of one side end face of the magnetic conducting sheet, the positioning and matching between the magnetic conducting sheet and the adjusting part is performed, then the screw thread matching between the adjusting part and the shell part one is performed, when the resistance is felt when the adjusting part continues to rotate, it indicates that the spin magnetic sheet has contacted with the center conductor, then the permanent magnet is placed and the fixing between the shell part one and the cover plate is performed. The shell is turned over, so that the shell part two is located above the shell part one, another spin magnetic sheet is pasted in the middle of one side end face of another magnetic conducting sheet, the positioning and matching between the magnetic conducting sheet and another adjusting part is performed, then the screw thread matching between the adjusting part and the shell part two, the placement of another permanent magnet, and finally the fixing between the cover plate and the shell part two are performed.

[0028] When the circulator of the embodiment is not used with the connector, the shell part one and the shell part two are placed in layers on the tool, the center conductor is located in the inner cavity, and the pin end of the center conductor is located at the through slot, the pin of the center conductor is supported by the corresponding part of the tool, so that the position of the center conductor is in the set position, and the fixing between the shell part one and the shell part two is performed. Then the installation of the parts above the center conductor is performed, the spin magnetic sheet is pasted in the middle of one side end face of the magnetic conducting sheet, then the positioning and matching between the magnetic conducting sheet and the adjusting part is performed, then the screw thread matching between the adjusting part and the shell part one is performed, when the resistance is felt when the adjusting part continues to rotate, it indicates that the spin magnetic sheet has contacted with the center conductor, then the permanent magnet is placed in the space and the cover plate is fixed. Then the shell is turned over, so that the shell part two is located on the upper side, at this time the tool can be taken away, and the above steps are repeated to install the parts in the shell part two.

Claims

1. A circulator comprising a housing, a center conductor, a gyromagnetic sheet and a permanent magnet being arranged in an inner cavity of the housing, a cover plate being fitted to the housing for closing an opening of the inner cavity, characterized in that: The inner cavity is also provided with an adjusting member, the adjusting member and / or the shell is provided with a retaining structure for retaining the adjusting member in a position axially located in the inner cavity, and at least the gyromagnetic sheet is limited between the center conductor and the adjusting member; the retaining structure is an inner thread structure arranged on the cavity wall of the inner cavity and an outer thread structure arranged on the outer wall of the adjusting member, and both sides of the center conductor are provided with the gyromagnetic sheet, the permanent magnet, the adjusting member and the cover plate.

2. The circulator of claim 1, wherein: The outer end of the adjusting member is provided with a radially extending matching groove.

3. The circulator of claim 1, wherein: The adjusting member is provided with a let-out space extending axially to let out the permanent magnet.

4. The circulator of claim 3, wherein: The let-out space axially penetrates the adjusting member, and the adjusting member is annular.

5. The circulator of claim 1, wherein: The inner cavity is also provided with a magnetic conducting sheet, the magnetic conducting sheet is located between the adjusting member and the gyromagnetic sheet, and the magnetic conducting sheet and the adjusting member are provided with mutually matched positioning structures.

6. The circulator of claim 5, wherein: The positioning structure includes a positioning groove arranged between the end face of the adjusting member and the end face of the magnetic conducting sheet and a positioning protrusion extending into the positioning groove.

7. A circulator according to claim 5 or 6, characterised in that: The gyromagnetic sheet, the magnetic conducting sheet and the permanent magnet are coaxially arranged.

8. The circulator of claim 1, wherein: The shell is composed of a shell part one and a shell part two, the shell part one and the shell part two are both provided with the inner cavity axially penetrating both ends, and the shell part one is provided with a through slot near the shell part two or the shell part two is provided with a through slot near the shell part one for the end part of the center conductor to extend out.

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