GB2533014A

GB2533014A - Magnetic turntable

Info

Publication number: GB2533014A
Application number: GB1512052.0A
Authority: GB
Inventors: Zhu Gong
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-07-10
Filing date: 2015-07-09
Publication date: 2016-06-08
Anticipated expiration: 2035-07-09
Also published as: GB201512053D0; CN104053258B; GB201512052D0; GB2533014B; CN104053258A; AU2015100320A4

Abstract

A magnetic turntable, comprises adjacent permanent magnets (311, fig.13) arranged with alternating polarities being positioned to a mounting disc 35; characterized in that: a magnet group 31 assembled by a plurality of permanent magnets arranged with alternating polarities being housed in a first through hole (351, fig.14) of the mounting disc, the top portion of the mounting disc (35) having a nonmagnetic cover 32 which arranges axially successive flanges (323, 324) along the inner and outer rims of the cover; a magnetic bottom board 33 provided at the bottom of the mounting disc; the bottom board , the mounting disc and the cover being connected together by fixed blocks 36,37, cooperating with lugs of the cover; a transmission shaft (4, fig.3) penetrating a blind hole at the centre of the mounting disc, the shaft having a radially transmission arm (42, fig.5). Conductor cuts more magnetic lines in the strong magnetic field caused by turning the magnetic turntable in the case of no AC power, therefore, the magnetic turntable can obtain higher efficiency of magnetocaloric effect.

Description

Magnetic turntable

Field of the Invention

The invention relates to a magnetocaloric device, especially to a

magnetic turntable.

Description of prior art

When alternating magnetic lines pass through the conductor, the induced electromotive force is generated in the conductor, the loop current generates in the conductor due to the effect of the induced electromotive force. The loop current caused by the passing of the alternating magnetic line through the conductor is called eddy current. the eddy current inside the conductor heat the conductor, the efficiency of the heat is proportional to the square of the frequency of the alternating magnetic field, and the square of the maximum of the magnetic induction intensity. The heating efficiency increases significantly due to the increasing of the frequency of the alternating magnetic field and the magnetic induction intensity. Currently alternating magnetic lines come from alternating current, alternating current causes alternating electric field,alternating electric field causes alternating magnetic field, finally alternating magnetic lines is caused.

The patent W01999/000802 discloses a method for manufacturing permanent magnets, according to the patent, permanent magnets with any thickness and any shape can be manufactured, the permanent magnets have high performance without any necessary of cutting.

Alternating magnetic lines caused by tranditional way is achieved with the support of electric power. It is the problem to generate an 30 alternating magnetic field with high performance when there is no electric power at the scene.

Summary of the present invention

The object of the invention is to provide a magnetic turntable so as to solve the above problem. When the turntalbe is rotating, there is an alternating magnetic field generated above the turntable with the advantages of high heat efficiency, low windage, low noise and renewing magnet groups easily.

In the following, the technical solution will be discribed.

A magnet group 31 assembled by a plurality of permanent magnets 311 arranged with alternating polarities is housed in a first turough hole 351 of the mounting disc 35, the top portion of the mounting disc 35 provids a nonmagnetic cover 32 which arranges axially successive flanges 323, 324 along the inner and outer rims of the cover 32, flanges 323, 324 are arranged to be embedded in the mounting disc 35, lugs321,322 for fixing are respectively and axially arranged to the inner and outer rims of the cover 32, lugs 321,322 continuing with the flanges 323,324 penetrate the mounting disc 35.

A magnetic bottom board 33 provided at the bottom of the mounting disc 35 inserts into the bottom of the mounting disc 35, sixth through holes 331 cooperated with first convex plates 354 at the bottom of the mounting disc 35 are arranged to the bottom board 33.

The bottom board 33, the mounting disc 35 and the cover 32 are connected tightly together by fixed blocks 36,37, one of arc walls of fixed blocks 36,37 coopeartes with lugs 321,322 of the cover 32, connecting walls 363,373 of two arc walls carry both of the bottom plates of the mounting disc 35 and the bottom board 33, the rivet 34 penetrates fixed blocks 36,37 and the lugs 321,322.

A blind hole 3512 is arranged to the center of the mounting disc 35, a wall 359 is arranged inside the blind hole 3512, a transmission shaft 4 penetrates the blind hole 3512 and radially has a transmission arm 42, there is also provided a supporting surface 412 cooperating with the mounting disc 35 to the transmission shaft 4.

There is provided a first slot 23 cooperating with the transmission arm 42 and a second slot 21 cooperating with the wall 359 to the transmission block 2 emboling the transmission shaft 4.

The transmission shaft 4, the mounting disc 35 and the transmission block 2 are connected tightly together by the nut 1.

A torque is exerted to the transmission shaft 4, the transmission arm 42 defined on the transmission shft 4 transfers the force to the transmission block 2 through the first slot 23, the transmission block 2 transfers the force to the wall 359 of the mounting disc 35 through io the second slot 21, finally the mounting disc 35 rotates axially with the transmission shaft 4.

Accroding to the invention,there are some advantages of the magnetic turntalbe will be described in the following.

The magnetic lines are collected on the plane to be heated due to the effect of the magnetic bottom board, whereby more alternating magnetic lines of a plurality of magnet groups assembed by a plurality of thin permanent magnets are genearted above the magnetic turntable, therefore, the magnetic turntable has a high heat efficiency. The magnetic turntable has low noise due to the cover and the bottom board inserting into the mounting disc. Due to the fastening of U-shaped fixed block, rivets can be easily cut off by diagonal pliers so as to achieve the quick separation of the bottom board, the cover and the mounting disc, when the magnetic energy of the turntable is run out, and then renewing the magnet groups, the assemble can be finished according to the relative process after renewing the magnetic groups.

Brief description of the drawing

In the following, the invention will be described in greater detail by 30 means of some embodiments with reference to the accompanying drawings, in which Fig.1 is a 3d-drawing of the magnetic turntable of the invention; Fig.2 is a 3d-drawing of the magnetic turntable from another view; Fig.3 is an exploded 3d-drawing fo the turntable; Fig.4 is a front view of the turntable; Fig.5 is a sectional view of Fig.4 along A-A derection; Fig.6 is a sectional view of Fig.4 along B-B derection; Fig.7 is a 3d-drawing of the magnetic disc; Fig.8 is a 3d-drawing of the magnetic disc from another view; Fig.9 is an exploded 3d-drawing of the magnetic disc; Fig.10 is a 3d-drawing of the magnet group; Fig.11 is detailed views of the part II in the Fig.14; Fig.12 is a front view of mounting disc assembled with magnet groups; Fig.13 is an exploded 3d-drawing of the magnet group; Fig.14 is a 3d-drawing of the mounting disc; Fig.15 is a 3d-drawing of the mounting disc from another view; is Fig.16 is a sectional view of Fig.12 along C-C derection; Fig.17 is detailed views of the part III in the Fig.16; Fig.18 is detailed views of the part I in the Fig.12; Fig.19 is a 3d-drawing of the cover; Fig.20 is a 3d-drawing of bottom board; zo Fig.21 is an exploded 3d-drawing of the transmission shaft; Fig.22 is a 3d-drawing of the first fixed block; Fig.23 is a 3d-drawing of the second fixed block; Fig.24 is a front view of the transmission block; Fig.25 is a 3d-drawing of the transmission block.

1. the nut; 2. the transmission block; 21. the second slot; 22. the eighth through hole; 23. the first slot; 3. the magnetic disc; 31. the magnet group; 311. the permanent magnet; 32. the cover; 321. the first lug; 322. the second lug; 323. the first flange; 324. the second flange; 325. the first pre-honing; 33. the bottom board; 331. the sixth through hole; 34. the rivet; 35. the mounting disc; 351. the first through hole; 352. the second through hole; 353. the third through hole; 354. the first convex plate; 355. the fourth through hole; 356. the second convex plate; 357. the avoidance hole; 358. the fifth throuth hole; 259. the wall; 3510. the first ring groove; 3511. the second ring groove; 3512. the blind hole; 3513. the third ring groove; 36. the first fixed block; 361. the first arc wall; 362. the second arc wall; 363. the first connecting wall; 364. the second pre-honing; 37. the second fixed block; 371. the third arc wall; 372. the fourth arc wall; 373. the second connecting wall; 374. the third pre-honing; 4. the transmission shaft; 41. the shaft; 411. the seventh through hole; 412. the supporting surface; 413.the keyway; 42. the transmission arm; 5. the pin.

Detailed description of the preferred embodiment

Referring to Fig.1 to Fig.3, there is provided a magnetic turntable. The turntable comprises a magnetic disc 3, a transmission shaft 4, a transmission block 4, a nut 2 and a pin 5.

The turntable shown in Fig 7 to Fig.9 comprises a cover 32, a plurality of magnet groups arranged in arrays, a mounting disc 35, a bottom board 33, first blocks 36, second blocks 37 and rivets 34. The magnet groups shown in Fig.10 and Fig.13 consists of 16 picecs of permanent magnets, each permanent magnet is 0.5mm thickness, 3mm height, 5mm length, the adjacent permanent magnets are arranged alternately, the arrangment of polarities shown in Fig.10.

The patent W01999/000802 discloses a method of producing laminated permanent magnet, according to the patent, a permanent magnet 311 with a thickness of 0.5mm is achieved.

The mounting disc 35 shown in Fig.14 has a disc shape, and is nonmagnetic. The mounting disc 35 provides a first through hole 351 for housing the magnet groups 31, the first through hole 351 is arranged to the mounting disc 35 in the form of a ring array, the central axis of the array is the axis of the mounting disc 35, adjacent magnet groups 31 are arranged such that the radial distance tetween them is 2mm and the tangential distance between them is 1mm (referring to Fig12), the mounting disc 35 further provides coaxially a second ring groove 3511 for receiving the bottom board 33, the second ring groove 3511 is arranged eight first convex plates 354 cooperating with the bottom board 33 (referring to Fig.11), there is provided uniformly four second through holes 352 near the outer ring of the second ring groove 3511, the second through holes 352 alternates with the third through holes 353. The mounting disc 35 also arranges coaxially second convex plates 356, which provides coaxially a fifth through hole 358 and a rectangular avoidance hole 357 for avoiding the transimission arm 42 of the transmission shaft 4.

The mounting disc 35 shown in Fig.15 provides a third ring groove 3513 for housing the first flange 323 of the cover 32 and a first ring groove 3510 for housing the second flange 324 of the cover 32, the first and third ring groove 3510, 3513 are arranged coaxially. The mounting disc 35 provides coaxially a blind hole 3512 for housing the transmission block 2, there is provided uniformly four walls 359 coopearting with the transmission block 2 around the blind hole 3512, walls 359 connects with the circumference and the bottom of the blind hole 3512.

The cover 32 shown in Fig.19 has a ring thin plate structure, and is nonmagnetic. A successive second flange 324 cooperating with the first ring groove 3510 of the mounting disc 35 is arranged axially to the inner edge of the cover 32, a successive first flange 323 cooperating with the third ring groove 3513 of the mounting disc 35 is arranged axially to the outer edge of the cover 32. Four first lugs 321 cooperating with the second through hole 352 of the mounting disc 35 are arranged axially to the first flange 323, Four second lugs 322 cooperating with the third through hole 352 of the mounting disc 35 are arranged axially to the second flange 324, the first and second lugs 321, 322 are provided with first pre-honings 325 for fastening ivets 34.

The bottom board 33 shown in Fig.20 has a ring thin plate structure, and is well magnetic. The bottom board 33 provides eight sixth through holes 331 cooperating with the mounting disc 35.

The transmission shaft 4 shown in Fig 21 comprises a shaft 41 and a transmission arm 42 arranged assembledly and radially. The shaft 4, from top to bottom, provides a key way 413 for connecting with the outer power source, a supporting surface cooperating with the second convex plate 356 of the mounting disc 35, a seventh through hole 411 cooperating with the transmission arm 42, a tread for fixing the nut 1 and a pinhole for cooperating with cotter pin.

The first fixed block 36 shown in Fig.22 has a U-shaped structur. The first fixed block 36 comprises a first arc wall 361, a second arc wall 362 coaxial with the first arc wall 361, a first connecting wall 363 for connecting the first and second arc walls 361, 362, and a second pre-honing 364 penetrating the the first and second arc walls 361, 362, the second pre-honing 364 cooperates with the rivet 34.

The second fixed block 37 shown in Fig.23 has a U-shaped structure. The first second block 37 comprises a third arc wall 371, a fourth arc wall 372 coaxial with the third arc wall 371, a second connecting wall 373 for connecting the third and fourth arc walls 371, 372, and a third pre-honing 374 penetrating the the third and fourth arc walls 371, 372, the third pre-honing 374 cooperates with the rivet 34.

The transmission block 2 shown in Fig.24 and Fig.25 has a thin cylindrical structure, the transmission block 2 comprises coaxially a eighth through hole 22 matching the gap of the shaft 41 of the transmission shaft 4, a first slot 23 cooperating with the transimission arm 42 of the transimission shaft 4, and four second slots 21 located uniformly around the block 2 and cooperating with the wall 359 of the mounting disc 35.

The following is the process of assembling the above parts.

1. Putting the cover 32 on the desk surface and making the first and second lugs 321, 322 towards up (referrign to Fig.19).

2. Aligning the first and second flanges 323,324 of the cover 32 with the third and first ring grooves 3513, 3510 of the mounting disc 35.

3. Aligning the first and second lugs 321, 322 of the cover 32 with the second and third through holes 352, 353 of the mounting disc 35.

4. Inserting the cover 32 into the mounting disc 35.

5. Putting the magnet groups 31 in the first through hole 351 of the mounting disc 35, arranging the polarities of adjacent permanent magnets of the neighboring magnet groups are opposite (referring to Fig.18).

6. Arranging the magnet groups close to the cover 32 and making it 10 not project from the second ring groove 3511 (referring to Fig.16-17).

7. Aligning the eight sixth through holes 331 of the bottom board 33 with the eight first convex plates 354 of the mounting disc 35, inserting the mounting disc 35 into the second ring groove 3511.

is 8. Fitting the arc wall of four first fixed blocks 36 and four second lugs 322 of the mounting disc 35 in pairs to align the first and second pre-honings 325, 364, and to arranging the first connecting wall 363 support the bottom surfaces of the mounting disc 35 and the bottom board 33, finally connecting the mounting disc 35, the zo bottom board 33 and the cover 32 tightly together with blind rivets 34.

9. Fitting the arc wall of four second fixed blocks 37 and four first lugs 321 of the mounting disc 35 in pairs to align the first and third pre-honings 325, 374, and to arranging the second connecting wall 373 support the bottom surfaces of the mounting disc 35 and the bottom board 33, finally connecting the mounting disc 35, the bottom board 33 and the cover 32 tightly together with blind rivets 34.

10. Inserting the transmission shaft 4 inserted with the transmission 30 arm 42 into the fifth through hole 358 of the mounting disc 35, aligning the supporting surface of the shaft 41 with the second convex plate of the mounting disc 35.

11. Reversing the parts assembled in step 10, sleeving the transmission block 2 into the transmission shaft 4 to arrange the transmission arm 42 in the first slot 21 of the transmission block 2, and to arrange the wall 359 of the mounting disc 35 in the second slot 21 located around the transmission block 2 (referrign to Fig.5-6).

12. Fastening the transimission shaft 4, the mounting disc 35 and the transmission block 2 together, inserting the pinhole of positioned at the end of the thread of the transmission shaft 4 by the cotter pin 5 to prevent unexpected falling of the nut 1.

Although the fastening of the mounting disc 35, the bottom board 33 and the cover 32 can be achieved by the cooperation between screws and nuts, loosening occures inevitably after the turntable rotating, so the dissolution of them occurs during the fast rotating, the magnet groups flying out of the mounting disc 35 causes accident. In order to prevent the loosening of the thread, it is a tranditional way to glue the cooperating portion of he thread such to make the two in one, although this method can prevent the loosening happening, it takes a big trouble to renew the magnet groups 31.

Claims

Claims 1. A magnetic turntable, comprising adjacent permanent magnets (311) arranged with alternating polarities being positoned to a mounting disc (35); characterized in that a magnet group (31) assembled by a plurality of permanent magnets (311) arranged with alternating polarities being housed in a first turough hole (351) of the mounting disc (35), the top portion of the mounting disc (35) providing a nonmagnetic cover (32) which arranges axially successive flanges (323, 324) along the inner and outer rims of the cover (32), flanges (323, 324) io embedded in the mounting disc (35), lugs(321,322) for fixing being respectively and axially arranged to the inner and outer rims of the cover (32), lugs (321,322) continuing with the flanges (323,324) penetrating the mounting disc (35); a magnetic bottom board (33) provided at the bottom of the mounting disc (35) being inserting into the bottom of the mounting disc (35), sixth through holes (331) cooperated with first convex plates (354) at the bottom of the mounting disc (35) being arranged to the bottom board (33); the bottom board (33), the mounting disc (35) and the cover (32) being connected tightly together by fixed blocks (36,37), one of arc walls of fixed blocks (36,37) coopearting with lugs (321,322) of the cover (32), connecting walls (363,373) of two arc walls carring both of the bottom plates of the mounting disc (35) and the bottom board (33), the rivet (34) penetrating fixed blocks (36,37) and the lugs (321,322); a blind hole (3512) being arranged to the center of the mounting disc (35), a wall (359) being arranged inside the blind hole (3512), a transmission shaft (4) penetrating the blind hole (3512) and radially having a transmission arm (42), there being also provided a supporting surface (412) cooperating with the mounting disc (35) to the transmission shaft (4); there being provided a first slot (23) cooperating with the transmission arm (42) and a second slot (21) cooperating with the wall (359) to the transmission block (2) emboling the transmission shaft (4); the transmission shaft (4), the mounting disc (35) and the transmission block (2) being connected tightly together by the nut (1).
2. A magnetic turntable according to claim 1, characterized in that the magnet groups (31) are arranged to the mounting disc (35) in in the form of a ring array, the central axis of the array being the axis of the mounting disc (35).
3. A magnetic turntable according to claim 2, characterized in that the polarities of adjacent magnets (311) of adjacent magnet groups (31) are opposite.
4. A magnetic turntable according to claim 3, characterized in that magnet groups (31) consists of 16 picecs of permanent magnets, each permanent magnet being 0.5mm thickness, 3mm heigth, 5mm 20 length.
5. A magnetic turntable according to claim 4, characterized in that adjacent magnet groups (31) are arranged such that the radial distance tetween them is 2mm and the tangential distance between 25 them is 1mm.
6. A magnetic turntable according to claim 1, characterized in that 4 lugs (321,322) are respectively and equally locacted on the inner and outer edges of the cover (32).
7. A magnetic turntable according to claim 1, characterized in that the lugs (321,322) located on the inner and outer edges of the cover (32) are arranged alternately along the radial direction.Amendments to the claims have been filed as follows Claims 1. A magnetic turntable, comprising adjacent permanent magnets (311) arranged with alternating polarities being positioned to a mounting disc (35); characterized in that a magnet group (31) assembled by a plurality of permanent magnets (311) arranged with alternating polarities being housed in a first through hole (351) of the mounting disc (35), the top portion of the mounting disc (35) providing a nonmagnetic cover (32) which arranges axially successive flanges (323, 324) along the inner and outer rims of the cover (32), flanges (323, 324) io embedded in the mounting disc (35), lugs(321,322) for fixing being respectively and axially arranged to the inner and outer rims of the cover (32), lugs (321,322) continuing with the flanges (323,324) penetrating the mounting disc (35); a magnetic bottom board (33) provided at the bottom of the mounting disc (35) being inserting into the bottom of the mounting disc (35), sixth through holes (331) cooperated with first convex CD plates (354) at the bottom of the mounting disc (35) being arranged LCD to the bottom board (33); CD the bottom board (33), the mounting disc (35) and the cover (32) being connected together by fixed blocks (36,37), one of arc walls of fixed blocks (36,37) cooperating with lugs (321,322) of the cover (32), connecting walls (363,373) of two arc walls carrying both of the bottom plates of the mounting disc (35) and the bottom board (33), a rivet (34) penetrating fixed blocks (36,37) and the lugs 25 (321,322); a blind hole (3512) being arranged to the center of the mounting disc (35), a wall (359) being arranged inside the blind hole (3512), a transmission shaft (4) penetrating the blind hole (3512) and radially having a transmission arm (42), there being also provided a supporting surface (412) cooperating with the mounting disc (35) to the transmission shaft (4); there being provided a first slot (23) cooperating with the transmission arm (42) and a second slot (21) cooperating with the wall (359) to the transmission block (2) penetrated by the transmission shaft (4); the transmission shaft (4), the mounting disc (35) and the transmission block (2) being connected together by a nut (1).2. A magnetic turntable according to claim 1, characterized in that the magnet groups (31) are arranged to the mounting disc (35) in the form of a ring array, the central axis of the array being the axis of io the mounting disc (35).3. A magnetic turntable according to claim 2, characterized in that the polarities of adjacent magnets (311) of adjacent magnet groups (31) are opposite.4. A magnetic turntable according to claim 3, characterized in that magnet groups (31) consists of 16 pieces of permanent magnets, each permanent magnet being 0.5mm thickness, 3mm height, 5mm length.5. A magnetic turntable according to claim 4, characterized in that adjacent magnet groups (31) are arranged such that the radial distance between them is 2mm and the tangential distance between them is 1mm.6. A magnetic turntable according to claim 1, characterized in that 4 lugs (321,322) are respectively and equally located on the inner and outer edges of the cover (32).7. A magnetic turntable according to claim 1, characterized in that the lugs (321,322) located on the inner and outer edges of the cover (32) are arranged alternately along the radial direction.