CN213635559U

CN213635559U - Permanent magnet assembly with sealed array structure

Info

Publication number: CN213635559U
Application number: CN202022664885.9U
Authority: CN
Inventors: 程虎; 张丽; 龙志强; 董钟; 龙娟
Original assignee: National University of Defense Technology; CRRC Tangshan Co Ltd
Current assignee: National University of Defense Technology; CRRC Tangshan Co Ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-07-06
Anticipated expiration: 2030-11-17

Abstract

The utility model discloses a canned type array structure permanent magnet subassembly, including many installation pipes that meet side by side and locate the mount of installation pipe below, the both ends of every installation pipe are equipped with sealed lid, and the lateral part of sealed lid is provided with the annular groove, inlays O shape sealing washer in the annular groove. The utility model discloses a canned type array structure permanent magnet subassembly can enough ensure the effective sealing protection of the interior permanent magnet of installation pipe, can ensure again that the installation of permanent magnet can go on high-efficiently smoothly. Furthermore, the utility model discloses a canned type array structure permanent magnet subassembly still has characteristics such as structure simple to operate, safe and reliable, low cost, the repeated dismouting of being convenient for, has extremely strong practicality, can satisfy the sealed demand of installation of array type Halbach structure permanent magnet of batch production.

Description

Permanent magnet assembly with sealed array structure

Technical Field

The utility model relates to an assembly field of array permanent magnet especially relates to a take seal structure's array structure permanent magnet subassembly.

Background

In 1985, the teaching of Halbach in the united states designed an arrangement structure of permanent magnets to make full use of the magnetic field of the permanent magnets. This structure, later referred to as a Halbach structure, has found widespread use in medical devices, particle accelerators, permanent magnet motors, and the like. The Halbach structure body formed based on the neodymium iron boron permanent magnet can generate an enough magnetic field and can be used for realizing the electric suspension and traction of a maglev train. At present, the urban magnetic suspension system of the general atomic energy company (GA) in the united states adopts a permanent magnetic Halbach structure body to carry out suspension and traction, and the Magplane in the united states also adopts a Halbach structure technology to carry out suspension and traction.

Chinese utility model patent (CN 203931703U) discloses array structure permanent magnet subassembly, as shown in fig. 1 to 4, including a plurality of installation pipes 1 and mount 2 that meet side by side, installation pipe 1 is the square pipe with permanent magnetism piece 71 adaptation, and installation pipe 1 below is located to mount 2. The bottom of every installation pipe 1 all is equipped with connecting portion 11, and connecting portion 11 passes through fastener 3 and mount 2 fixed connection. As shown in fig. 4, a plurality of permanent magnets 71 are placed in a cavity of the installation tube 1, end covers 4 are arranged at two ends of the installation tube 1, holes for placing positioning pins 5 are arranged on the end covers 4, the positioning pins 5 are arranged on the top side and the bottom side of the installation tube 1, and the end covers 4 and the installation tube 1 can be fixedly connected through the positioning pins 5; one side of locating pin 5 is equipped with anticreep screw 6, and the horizontal direction of end cover 4 is equipped with the screw hole that makes things convenient for anticreep screw 6 to twist.

Although the above-mentioned chinese utility model discloses an array structure permanent magnet assembly and a corresponding method of assembly and disassembly, and other array structure permanent magnet assemblies and other methods of assembly and disassembly are also disclosed in the prior art, neither of them relates to a sealing member of an array structure permanent magnet assembly and a corresponding method of sealing. With the wide application of the Halbach structure body formed by the neodymium iron boron permanent magnet, in the long-term use process, the Halbach structure permanent magnet in the installation pipe is easily affected by the environment to cause the iron element in the permanent magnet to be oxidized and rusted, and the service life of the permanent magnet is greatly affected. In the prior art, in order to prolong the service life of the permanent magnet, certain surface treatment, such as zinc plating, nickel plating, epoxy treatment, even gold plating and silver plating, is often performed in the production process of the neodymium iron boron permanent magnet. Although these surface treatments can provide some protection, the coating (protective layer) is thin, typically 10 μm to 30 μm, and is prone to wear or damage during transportation and assembly of the permanent magnet. Under the severe environmental conditions of humidity or acid rain and the like, the surface of the permanent magnet is easy to rust, thereby affecting the magnetic property of the permanent magnet and causing very adverse effect on the long-term safe use of the permanent magnet. Therefore, a more stable and reliable sealing protection technical scheme of the array type Halbach structure permanent magnet is needed to be searched.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to be difficult to carry out effectual sealed protection to Halbach structure permanent magnet among the prior art, lead to Halbach structure permanent magnet to receive external environment influence easily and rust ageing, and then very big influence permanent magnet life's not enough, provide an installation easy and simple to handle, install reliable and stable, maintainability is strong, can effectively prolong the life of permanent magnet to be fit for batch production's canned type array structure permanent magnet subassembly.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides a canned type array structure permanent magnet subassembly, includes many installation pipes that meet side by side and locates the mount of installation pipe below, every the both ends of installation pipe are equipped with sealed lid, the lateral part of sealed lid is provided with the annular groove, inlay O shape sealing washer in the annular groove.

As a further improvement of the utility model, the middle part of the sealing cover is provided with an exhaust through hole.

As a further improvement of the utility model, the sealing cover is provided with an air guide groove on the inner end surface close to the annular groove.

As a further improvement of the utility model, the exhaust through hole is communicated with the air guide groove.

As a further improvement of the utility model, the sealing cover is provided with a concave counter bore on the external end face away from the annular groove.

As a further improvement of the utility model, the exhaust through hole is communicated with the concave counter bore.

As a further improvement of the utility model, the sealing cover is also provided with a screw for sealing the exhaust through hole.

As a further improvement of the utility model, the sealing cover is fixedly connected with the installation pipe through a positioning pin.

As a further improvement of the present invention, the positioning pin is provided on the top side and the bottom side of the mounting pipe, and the top side and the bottom side of the mounting pipe are provided with at least one positioning pin.

As a further improvement, one side of the positioning pin is provided with an anti-disengaging screw for preventing the positioning pin from disengaging.

Compared with the prior art, the utility model has the advantages of:

1. the utility model discloses canned type array structure permanent magnet subassembly sets up sealed lid through the both ends at every installation pipe, and the lateral part of sealed lid is provided with the annular groove to inlay O shape sealing washer in the annular groove, can enough ensure the effective sealed protection of installing intraductal permanent magnet, can ensure again that the installation of permanent magnet can go on high-efficiently smoothly. Furthermore, the utility model discloses a canned type array structure permanent magnet subassembly still has characteristics such as structure simple to operate, safe and reliable, low cost, the repeated dismouting of being convenient for, has extremely strong practicality, can satisfy the sealed demand of installation of array type Halbach structure permanent magnet of batch production.

2. The utility model discloses canned type array structure permanent magnet subassembly, the O shape sealing washer through embedding soft material preparation in the annular groove can effectively keep apart the interior permanent magnetism piece of installation pipe with external gas, avoids external gas to rust the iron element oxidation in with the permanent magnet, and then prolongs the life of Halbach structure permanent magnet greatly.

3. The utility model discloses canned type array structure permanent magnet subassembly, through set up the air guide groove on the inside terminal surface that is close to the annular groove on sealed piece, and set up the exhaust through-hole in the centre of sealed lid, during installation Halbach structure permanent magnet, the cooperation through air guide groove and exhaust through-hole extrudes the intraductal air of installation, can avoid the corrosive gas in the air to rust with the iron element oxidation in the permanent magnetism piece, further improve the leakproofness of permanent magnet in the installation pipe, very big life that is favorable to prolonging Halbach structure permanent magnet.

Drawings

Fig. 1 is a schematic structural principle diagram of a permanent magnet of an array structure in the prior art.

Fig. 2 is a schematic perspective view of a permanent magnet assembly in an array structure according to the prior art.

Fig. 3 is a partial schematic front view of a prior art array structure permanent magnet assembly.

Fig. 4 is a partial sectional view of section a-a of fig. 3.

Fig. 5 is a schematic perspective view (viewed from the inner side of the square tube) of the sealing cap according to the embodiment of the present invention.

Fig. 6 is a schematic perspective view (viewed from the outside of the square tube) of the sealing cap according to the embodiment of the present invention.

Figure 7 is an axial cross-sectional view of a seal cap in an embodiment of the invention (the dowel hole and the anti-slip screw hole are not shown).

Fig. 8 is a schematic diagram of the structural principle of the permanent magnet block of the single-period Halbach structure body of the present invention installed and sealed in the installation pipe.

The reference numerals in the figures denote:

1. installing a pipe; 11. a connecting portion; 111. accommodating grooves; 12. a nut; 2. a fixed mount; 3. a fastener; 4. an end cap; 5. positioning pins; 51. a positioning pin hole; 6. anti-drop screws 61, anti-drop screw holes; 71. permanent magnet blocks; 8. a sealing cover; 81. an annular groove; 82. an exhaust through hole; 83. a gas guide groove; 84. a concave counter bore; 9. a screw; 10. and an O-shaped sealing ring.

Detailed Description

The invention will be further described with reference to the drawings and specific preferred embodiments without limiting the scope of the invention.

In this embodiment, referring to fig. 1 and 2, a fixing frame 2 and a plurality of installation pipes 1 connected side by side are provided, the installation pipes 1 are square pipes adapted to the permanent magnets 71, and the fixing frame 2 is provided below the installation pipes 1. The utility model discloses a canned type array permanent magnet subassembly's mounting method does: the permanent magnet block 71 of the single-period Halbach structure body is hermetically arranged in an installation pipe 1; a plurality of installation pipes 1 are assembled and installed on a fixed frame 2 side by side. The array structure permanent magnet assembly is formed by assembling unit permanent magnets 71 of which the magnetization directions change according to a certain rule, the Halbach structure permanent magnets 71 are arranged in a multi-period mode, and gaps among the permanent magnets 71 are small. In this embodiment, every both sides tip of installation pipe 1 all is equipped with sealed lid 8, has effectively guaranteed the sealed protection of permanent magnetism piece 71 in the installation pipe 1, and the convenience of installation dismantlement has been guaranteed in the connection of dismantling of sealed piece 8 simultaneously, has effectively reduced the equipment and the maintenance degree of difficulty that come canned type array permanent magnet subassembly. It can be understood that the utility model discloses in, all can guarantee the effective sealed structure of installation pipe 1, all should be within the protection scope of the utility model.

Referring to fig. 5 and 8, in the present embodiment, the sealing cap 8 is provided at a side portion thereof with an annular groove 81, and the O-ring 10 is inserted into the annular groove 81. The gap between the sealing cover 8 and the mounting tube 1 is closed by the O-ring 10, thereby isolating the permanent magnets 71 in the mounting tube 1 from the external ambient air. In this embodiment, in order to improve the sealing performance of the O-ring 10, the O-ring 10 is made of a soft material. Specifically, the soft material for preparing the O-ring 10 may be rubber or silica gel. It is understood that the soft material for making the O-ring 10 can be other soft materials with elastic deformation capability to obtain better sealing effect.

Referring to fig. 5, in the present embodiment, an air vent hole 82 is formed in the middle of the sealing cover 8, and an air guide groove 83 is formed on the inner end surface of the sealing cover 8 close to the annular groove 81. The exhaust through hole 82 communicates with the air guide groove 83. In the process of pressing the permanent magnet with the single-period Halbach structure into the installation pipe 1, air in the installation pipe 1 is extruded out through the air exhaust through hole 82 and the air guide groove 83 on the sealing cover 8. The iron element in the permanent magnet is prevented from being oxidized and rusted by corrosive gas in the air, the sealing performance of the permanent magnet block 71 in the installation pipe 1 is further improved, and the service life of the Halbach structure permanent magnet is greatly prolonged. It can be understood that the utility model discloses a sealed lid that permanent magnet assembly used is applicable to all array permanent magnet assemblies that adopt installation pipe and mount cooperation mode to set up and seals.

Further, in order to prevent the sealing cover 8 from moving in the mounting tube 1, the sealing cover 8 may be positioned and fixed by the positioning pin 5 during the mounting process of the sealing cover 8. After the permanent magnet is installed, the positioning pin 5 screwed into the sealing cover 8 is prevented from being disengaged by the fixing action of the anti-disengaging screw 6, and the safety is improved. Specifically, as shown in fig. 6, the sealing cover 8 is provided with a positioning pin hole 51 for installing the positioning pin 5, the positioning pin 5 is arranged on the top side and the bottom side of the installation pipe 1, the sealing cover 8 and the installation pipe 1 are fixedly positioned by the positioning pin 5, and the arrangement of the positioning pin 5 improves the convenience of disassembly and assembly; an anti-falling screw 6 is arranged on one side of the positioning pin 5, and an anti-falling screw hole 61 which is convenient for the anti-falling screw 6 to be screwed in is arranged in the horizontal direction of the sealing cover 8. In this embodiment, the number of the positioning pins 5 is 4, and 2 positioning pins 5 are respectively arranged on the top side and the bottom side of the mounting tube 1 to connect the sealing cover 8 with the mounting tube 1. In other embodiments, at least 1 dowel pin 5 is provided on the top and bottom sides of the mounting tube 1.

Referring to fig. 6 and 7, in the embodiment, in order to improve the sealing performance of the installation pipe 1 in the array type Halbach structure permanent magnet assembly, a concave counter bore 84 is arranged on the outer end face, away from the annular groove 81, of the sealing cover 8, the concave counter bore 84 is communicated with the exhaust through hole 82, the screw 9 is located in the concave counter bore 84, and the screw 9 is flush with the contact surface of the sealing cover 8 during installation, so that the outer size of the installation pipe 1 is reduced, and the installation pipe is neat, attractive and convenient to move.

To further improve the sealing effect, the surface of the screw 9 may be pretreated to assist sealing before the screw 9 is installed. In this embodiment, the thread tape is wound on the surface of the screw 9 or the sealant is coated on the surface of the screw 9, so as to improve the fixing and sealing effect of the screw 9 on the sealing cover 8. It can be understood that, in the utility model, all pretreatment methods that can improve the sealing performance of the screw 9 should be within the protection scope of the utility model.

In a specific embodiment, the utility model discloses an installation dismantlement process does: a plurality of mounting tubes 1 are placed in parallel and fixed on a fixing frame 2 to form a permanent magnet array arrangement as shown in fig. 1, the final appearance is as shown in fig. 2, and the structural arrangement in the mounting tubes 1 is as shown in fig. 8. After the installation pipe 1 is fixed on the fixing frame 2, the end part of one side of the installation pipe 1 is laterally positioned and sealed through the matching of the sealing cover 8 and the positioning pin 5, after the permanent magnet block 71 with the single-period Halbach structure is pressed into the same installation pipe 1 through the clamp, the end part of the other side of the installation pipe 1 is positioned through the sealing cover 8 and the positioning pin 5, the anti-falling screw 6 is arranged at one end of the positioning pin 5, and finally the screw 9 is arranged in the concave counter bore 84 to seal the exhaust through hole 82. The disassembly can be completed by reverse operation, namely the anti-falling screw 6 is firstly loosened, then the positioning pin 5 is taken out, the sealing cover 8 on one side of the installation pipe 1 is disassembled, and the permanent magnet block 71 can be withdrawn from the installation pipe 1. The utility model discloses a canned type array structure permanent magnet subassembly can enough ensure the effective sealing protection of permanent magnet in the installation pipe, can ensure again that the installation of permanent magnet can go on high-efficiently smoothly. Meanwhile, the utility model discloses a canned type array structure permanent magnet subassembly still has characteristics such as structure simple to operate, safe and reliable, low cost, the repeated dismouting of being convenient for, has extremely strong practicality, can satisfy the sealed demand of installation of array type Halbach structure permanent magnet of batch production.

Referring to fig. 1, in the embodiment, the array structure permanent magnet 7 is a multi-period arrangement array of Halbach structure permanent magnet blocks 71, gaps between the permanent magnet blocks 71 are small, a small arrow of each permanent magnet block 71 marks the N, S pole direction of the permanent magnet, the magnetizing directions of adjacent permanent magnet blocks 71 are different by 45 degrees, and the arrangement mode ensures that the magnetic field on the front side of the motor is strengthened, and the magnetic field on the other side of the motor is weak, so that the purpose of fully utilizing the magnetic field of the permanent magnet is achieved.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. Those skilled in the art can make numerous changes and modifications to the disclosed embodiments, or modify equivalent embodiments, without departing from the spirit and scope of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a canned type array structure permanent magnet subassembly, includes many installation pipe (1) that meet side by side and locates mount (2) of installation pipe (1) below, its characterized in that: every the both ends of installation pipe (1) are equipped with sealed lid (8), the lateral part of sealed lid (8) is provided with annular groove (81), inlay O shape sealing washer (10) in annular groove (81).

2. The permanent magnet assembly of a sealed array structure of claim 1 wherein: and an exhaust through hole (82) is formed in the middle of the sealing cover (8).

3. The permanent magnet assembly of a closed type array structure of claim 2, wherein: and an air guide groove (83) is formed in the inner end face, close to the annular groove (81), of the sealing cover (8).

4. The permanent magnet assembly of a closed type array structure of claim 3, wherein: the exhaust through hole (82) is communicated with the air guide groove (83).

5. The permanent magnet assembly of a closed type array structure of claim 2, wherein: and a concave counter bore (84) is formed in the end face, away from the annular groove (81), of the sealing cover (8) on the outer side.

6. The permanent magnet assembly of a sealed array structure of claim 5 wherein: the exhaust through hole (82) is communicated with the concave counter bore (84).

7. The permanent magnet assembly of a hermetically sealed array structure of claim 6 wherein: the sealing cover (8) is also provided with a screw (9) for sealing the exhaust through hole (82).

8. The permanent magnet assembly of a closed type array structure according to any one of claims 1 to 7, wherein: the sealing cover (8) is fixedly connected with the mounting pipe (1) through a positioning pin (5).

9. The permanent magnet assembly of a hermetically sealed array structure of claim 8 wherein: the positioning pins (5) are arranged on the top side and the bottom side of the mounting pipe (1), and at least one positioning pin (5) is arranged on the top side and the bottom side of the mounting pipe (1).

10. The permanent magnet assembly of a hermetically sealed array structure of claim 8 wherein: and one side of the positioning pin (5) is provided with an anti-loosening screw (6) for preventing the positioning pin (5) from loosening.