CN201354756Y - Magnetic fluid shaft seal - Google Patents
Magnetic fluid shaft seal Download PDFInfo
- Publication number
- CN201354756Y CN201354756Y CNU2009200007039U CN200920000703U CN201354756Y CN 201354756 Y CN201354756 Y CN 201354756Y CN U2009200007039 U CNU2009200007039 U CN U2009200007039U CN 200920000703 U CN200920000703 U CN 200920000703U CN 201354756 Y CN201354756 Y CN 201354756Y
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- Prior art keywords
- envelope
- lid
- groove
- axle collar
- ring
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model relates to a magnetic fluid shaft seal, which comprises a cover body capable of being combined on the outer side of a pump case, a shaft ring, a plurality of separated ring-shaped pole pieces, at least one ring-shaped magnet and magnetic fluid. The shaft ring is combined on a rotating shaft or a shaft sleeve inside the pump case and can be driven, the shaft ring sleeved inside the cover body forms at least one shaft seal chamber, the pole pieces and the magnet are in staggered arrangement in the shaft seal chamber along the axial direction of the shaft ring, an internal peripheral wall of the shaft ring is equipped with a plurality of projection portions with triangle-like sections, sealing clearances are arranged among the projection portions and the pole pieces, the magnetic fluid is filled into the sealing clearances, by aid of the magnetic field of the magnet, the magnetic fluid is adsorbed and kept in the clearances to form seal through a magnetic flowing loop formed by the pole pieces and the shaft ring, and the design of the projections can further increase sealing property of the magnetic fluid.
Description
Technical field
The utility model relates to a kind of envelope, particularly about a kind of shaft seal structure that forms sealing by magnetic fluid.
Background technique
Pumping axle envelope commonly used mainly comprises mechanical seal and magnet fluid sealing etc.Wherein, the sealing surface of rotating shaft be lubricated or be cooled off to mechanical seal need by fed sheet of a media usually, yet, along with the gradually wearing and tearing of sealing surface in high speed rotating, dielectric leakage is inevasible structure disappearance, and then may cause environmental pollution, and need often carry out the dismounting maintenance.
But magnet fluid sealing generally comprises a ringshaped magnet, is contained in two utmost point pieces of these magnet both sides, rotating shaft or the axle sleeve and the magnetic fluid of a magnetic conduction; Form a gap between this rotating shaft and the utmost point piece, this magnetic fluid injects in this gap, striding across this rotating shaft and the formed flux circuit of utmost point piece by the magnetic field of magnet attracts this magnetic fluid and remains in this gap, make this magnetic fluid form O type ring, and can between this rotating shaft and pump case, constitute a leak free sealing as same liquid state.
Magnet fluid sealing has and does not have machinery wearing and tearing and the advantage of leaking, yet, at high temperature be difficult to stablize, that is, magnetic fluid is subjected to the high temperature may demagnetize or demagnetization and sealing is weakened or lost efficacy, causes the interior fed sheet of a media of pumping to be leaked by the gap between rotating shaft and the utmost point piece.In addition, magnetic current axon envelope commonly used still has the problem that is difficult for I﹠M.So, should have a kind of magnetic current axon envelope of tool progressive to produce, with the leakage problem of improving pumping axle envelope and have advantage such as assembling facility.
Summary of the invention
Main purpose of the present utility model is to provide a kind of magnetic current axon envelope, this envelope can be installed in the pumping and prevent to leak in order to the relatively rotating interface of rotating shaft of sealing pumping, and this envelope provides a special gap structure to keep magnetic fluid, make magnetic flux can concentrate and can prevent and leak, the advantage of this envelope and the assembling that can facilitate.
The purpose of this utility model is to adopt following technological means to realize: a kind of magnetic current axon envelope comprises lid, an axle collar, plural separated ring-type utmost point piece, at least one ringshaped magnet and the magnetic fluid that can be combined in the pump case outside; This axle collar is combined in the rotating shaft of this pump case inside and can be driven, and this axle collar system is placed in this lid and forms at least one envelope chamber, and this utmost point piece and this magnet system along this axle collar axially to be configured in this envelope alternately indoor, has a seal clearance between the flange inner circle wall of this axle collar and this plural number utmost point piece again, and this magnetic current system is filled in the sealing gap, and the flux circuit that forms by this utmost point piece and this axle collar by the magnetic field of this magnet is with this magnetic fluid absorption and remain in and form sealing in this gap.In one embodiment, but this utmost point piece, this lid and this axle collar system are made by the material of magnetic conduction respectively; The inner circle wall of one end of this axle collar is provided with separated vertically ring-type bump of plural number and the position groove between adjacent two bumps.
Specifically, the purpose of this utility model is to adopt following technological means to realize:
A kind of magnetic current axon envelope comprises:
One lid, it can be combined in inside has on the pump case of rotating shaft, this lid has the axis hole that this two end is run through in the inner towards this pump case, an outer end and, this axis hole can pass for this rotating shaft, and this lid outer end is provided with an annular recessed portion, this annular recessed portion and this axis hole have same axis, and this recess is separated into an outer portion and an internal ring portion with this lid outer end, and this internal ring portion has a periphery wall;
One axle collar, its can be combined in this rotating shaft outside and with this rotating shaft corotation, this axle collar has first end and one second end towards this lid, first end of this axle collar inserts in the recess of this lid, first end of this axle collar has an inner circle wall, has an envelope chamber between this inner circle wall and this lid internal ring portion periphery wall;
One ringshaped magnet, it is enclosed within on the periphery wall of internal ring portion of this lid and to be installed in this envelope indoor;
Two utmost point pieces, it is enclosed within on the periphery wall of internal ring portion of this lid and to be installed in this envelope indoor, this two utmost points piece position two sides of this magnet and and this flange inner circle wall between have a gap; And
Magnetic fluid, it is filled in the indoor and gap between this utmost point piece and this flange of this envelope.
But this utmost point piece, this lid and this axle collar system are made by the material of magnetic conduction individually; The inner circle wall of this axle collar first end is provided with separated vertically ring-type bump of plural number and the position groove between adjacent two bumps.
This axle collar first end has the first portion and the second portion away from this axle collar second end of contiguous this axle collar second end; This plural number groove comprise the position in the first portion of this first end first annular groove and the position at second annular groove of the second portion of this first end, this first annular groove and second annular groove system form the cross section external form of right-angled triangle and have the inclined-plane of one side to internal ring portion individually, the inclined-plane system of each first annular groove is towards this first portion, and the inclined-plane of each second annular groove system is towards this second portion.
This envelope further comprises one second magnet and one the 3rd utmost point piece, and it is indoor that this three utmost points piece and this two magnet system are installed in this envelope alternately.
The axis hole of this axle collar forms an expansion section at the first end place, make to have an annulus that constitutes this envelope chamber between this axle collar first end and this internal ring portion, and the longitudinal length of this expansion section equals the axial length of this internal ring portion.
Further be provided with the separated engagement groove of plural equal angles on the outer end of this lid and count the staggered penetration hole of engagement groove, and have plural screw correspondence to pass each penetration hole and lock the end of this pump case and lid is fixed on the pump case with this; This axle collar is provided with an annular ditch groove and inserts individually in order to plural positioning plate to be provided, and these positioning plates are also aimed at combination in the engagement groove that inserts this lid.
But this utmost point piece, this lid and this axle collar system are made by the material of magnetic conduction respectively; This lid comprises one first cover body part and one second cover body part, the two ends system of each cover body part has an interface individually, has a groove on each interface, this two cover body part system can this lid of the involutory composition of interface, and inserts a pair of liner that should groove shapes in the groove of this cover body part to seal this two interface; This axle collar system comprises one first collar part and one second collar part again, the two ends system of each collar part has an interface individually, has a groove on each interface, this two collar part system is with this axle collar of the involutory composition of interface, and inserts a pair of liner that should groove shapes in the groove of this two collar part to seal this two interface.
The inner circle wall of this axle collar first end is provided with separated vertically ring-type bump of plural number and the position groove between adjacent two bumps.
This axle collar first end has first part and the second portion away from this axle collar second end of contiguous this axle collar second end, this plural number groove system comprise the position in first annular groove of the first portion of this first end and position second annular groove at the second portion of this first end, this first annular groove and second annular groove system form the cross section external form of right-angled triangle and have the inclined-plane of one side to internal ring portion individually, the inclined-plane system of each first annular groove is towards this first portion, and the inclined-plane of each second annular groove system is towards this second portion.
The part of second end of this axle collar system insert in the recess of this lid and and this outer portion between have one second envelope chamber, this second an indoor ringshaped magnet, two utmost point piece and the magnetic fluids taken in of envelope are in the gap of this magnetic fluid between this utmost point piece and this outer portion.
This lid is provided with a cooling liquid inlet and a cooling liquid outlet that is communicated with this second envelope groove, and be provided with sealing retaining at a side of this cooling liquid outlet of vicinity of this recess inwall, make to flow into that cooling liquid in this recess can be clashed into this sealing retaining by this cooling liquid outlet the time and from this outlet outflow; The outside of first end of this axle collar is provided with the radially separated groove of plural number in order to stir the cooling liquid in this recess.
The outside system of the part of second end of this axle collar is provided with separated vertically ring-type bump of plural number and the position groove between adjacent two bumps, have a seal clearance between utmost point piece in this bump and the second envelope groove and the magnet, this magnetic fluid is filled in the sealing gap.
Further comprise a mechanical shaft seal, it is indoor that this mechanical shaft seal can be installed between the inner of this lid and this pump case a formed envelope; This mechanical shaft seal has an axle sleeve, a rotating ring and retaining ring; This axle sleeve wears and is fixed in this rotating shaft, and this axle sleeve extends through this lid and provide this axle collar to wear fixing; Should be fixedly ring system be installed on this axle sleeve and be positioned in this lid, this rotating ring is positioned on this axle sleeve and can rotates along with this axle sleeve, and this rotation ring system applying is contacted with this retaining ring.
This mechanical shaft seal further comprises plural spring, and this plural number spring sees through a packing ring and is butted on this retaining ring in order to this retaining ring is applied forward elastic force.
Below in conjunction with drawings and Examples the utility model is done further detailed explanation.
Description of drawings
Fig. 1 is the assembly exploded view that seals according to the axle that the utility model first embodiment forms;
Fig. 2 is the combination view of Fig. 1;
The sectional view of Fig. 3 for being got along the 3-3 line of Fig. 2, and show that this envelope is assembled on the pump case;
The sectional view of Fig. 4 for being got along the 4-4 line of Fig. 2, and show that this envelope is assembled on the pump case;
Fig. 5 gets enlarged view partly for the circle of Fig. 4;
Fig. 6 is a sectional view that seals according to the axle that the utility model second embodiment forms;
Fig. 7 is the assembly exploded view that seals according to the axle that the utility model the 3rd embodiment forms;
Fig. 8 is the combination view of Fig. 7;
The sectional view of Fig. 9 for being got along the 9-9 line of Fig. 8;
The sectional view of Figure 10 for being got along the 10-10 line of Fig. 8;
Figure 11 is a sectional view that seals according to the axle that the utility model the 4th embodiment forms;
Figure 12 is the assembly exploded view that seals according to the axle that the utility model the 5th embodiment forms;
Figure 13 is the combination view of Figure 12;
The sectional view of Figure 14 for being got along the 14-14 line of Figure 13;
Figure 15 is the partial enlarged drawing of Figure 14, and shows that this envelope is assembled on the pump case;
Figure 16 is one of the lid of Figure 12 stereogram of deciding what is right and what is wrong;
Figure 17 is the assembly exploded view that seals according to the axle that the utility model the 6th embodiment forms;
Figure 18 is the combination view of Figure 17;
The sectional view of Figure 19 for being got along the 19-19 line of Figure 18; And
The sectional view of Figure 20 for being got along the 20-20 line of Figure 18.
The primary component symbol description:
1. 10. envelopes of pump case
11. end 2. rotating shafts
3. lid 3a.3b. cover body part
31. inner 32. outer ends
33. axis hole 331. hole walls
332.333.O type ring 334.335. slotted eye
34. penetration hole 35. screws
36. recess 360. cooling liquid outlets
361. outer portion 362. inner circle walls
363. internal ring portion 364. periphery walls
365. breach 366.O type ring
367.368. axle envelope groove 369. cooling liquids inlet
37. engagement groove 38. outer walls
381. opening 382. stoppers
391. interface 392. grooves
393. connecting part 394.397. protuberance
395.396. groove 398. sealings retaining
4. axle collar 4a.4b. collar part
41. first end, 411. grooves
42. second end, 43. axis holes
431. hole wall 432.O type ring
434.435. slotted eye 44. expansion sections
440. inner circle wall 441. first portions
442. second portion 443. intermediate portions
46. bump 460. grooves
461. first annular groove, 462. second annular grooves
463.464. 465.466. side, inclined-plane
47. groove 471. positioning plates
472. link 48. positioning holes
481. coupling unit 49. liners
491. interface 492. grooves
493. connecting plate 494. screws
5. utmost point piece 51. center holes
6. magnet 61. center holes
7. magnetic fluid 71. gaps
72. 8. envelopes of flux circuit chamber
81.82. axle envelope chamber 9. mechanical shaft seals
90. axle envelope chamber 91. axle sleeves
92. rotating ring 93. retaining rings
94. spring 95. packing rings
Embodiment
Relevant structure of the present utility model design, will via only for example but non-in order to restriction embodiment and with reference to appended graphic being described further:
See also Fig. 1 to Fig. 5, show the magnetic current axon envelope 10 that constitutes according to the utility model first embodiment; The end 11 that this envelope 10 is installed in a pump case 1 has a rotating shaft 2 in this pump case 1, this rotating shaft 2 is to be subjected to bearing (not icon) to support and can rotate relative to this pump case 1, and this seals 10 and the rotary connector of these rotating shaft 2 relative these pump case ends 11 can be sealed.In the present embodiment, this envelope 10 comprises a lid 3 and an axle collar 4, define an envelope chamber 8 between this lid 3 and this axle collar 4, take in three separated ring-type utmost point pieces 5, two ringshaped magnets 6 and can be the magnetic fluid 7 that flux circuit attracts in this envelope chamber 8.
This lid 3 has the axis hole 33 that this two end is run through in the inner 31 towards this pump case 1, an outer end 32 and relative with this inner 31; The end face of this lid the inner 31 is installed a flexible O type ring 333 makes this lid 3 form sealing in this pump case end 11 relatively; This axis hole 33 can pass ordinatedly for this rotating shaft 2, and on the hole wall 331 of this axis hole 33 installing one flexible O type ring 332 make this lid 3 relatively this rotating shaft 2 form and seal; The outer end 32 of this lid 3 is provided with an annular recessed portion 36, this recess 36 has same axis and this lid outer end 32 is separated into an outer portion 361 and an internal ring portion 363 with these axis hole 33 cordings, 361 of this outer portion are between the outer wall 38 of this recess 36 and this lid 3,363 of this internal ring portions are between this recess 36 and this axis hole 33, in the present embodiment, have a breach 365 between the end face of this internal ring portion 363 and this outer end 32, and this internal ring portion 363 has a periphery wall 364; Further be provided with separated engagement groove 37 of plural equal angles and penetration hole 34 on the outer end 32 of this lid 3, and have plural spiral shell 35 correspondences to pass each penetration hole 34 and lock the end 11 of this pump case 1 and lid 3 is fixed on (see figure 3) on the pump case 1; Have an opening 381 on the outer wall 38 of this lid 3 again, this opening 381 is communicated with this annular recessed portion 36.
But this axle collar 4 is to make and be combined in this rotating shaft 2 by the material of magnetic conduction to rotate with this rotating shaft 2; This axle collar 4 have first end 41 towards this lid 3, one and these first end, 41 second opposed end 42 and one run through the axis hole 43 of this two end, this axis hole 43 can pass ordinatedly for this rotating shaft 2, and on the hole wall 431 of this axis hole 43 installing one flexible O type ring 432 make this axle collar 4 relatively this rotating shaft 2 form and seal; Separated positioning hole 48 was combined in this axle collar 4 in this rotating shaft 2 in order to provide 481 of plural coupling units not penetrate around this axle collar 4 was provided with the plural number edge, and further being provided with an annular ditch groove 47 on this axle collar 4 Cha Ru not in order to 471 of plural positioning plates to be provided, these positioning plates 471 are also aimed in the engagement groove 37 that inserts this lid 3 (seeing the imaginary line of Fig. 4), pass each positioning plate 471 by the link (not icon) of for example screw again and lock this lid 3 and this axle collar 4 is incorporated on this lid 3.
The external diameter system of these axle collar 4 first ends 41 is slightly less than the internal diameter of this annular recessed portion 36, make that this first end 41 is can insert ordinatedly in this annular recessed portion 36, and at the inner circle wall 362 installing one flexible O type ring 366 of this outer portion 361, make this first end 41 periphery wall relatively this lid 3 form and seal; This axis hole 43 forms an expansion section 44 at first end, 41 places, makes the radial thickness of this first end 41 less than the radial width of this recess 36, and has an annulus (see figure 5) that constitutes this envelope chamber 8 between this first end 41 and this internal ring portion 363; In the present embodiment, the longitudinal length of this expansion section 44 approximates the axial length of this internal ring portion 363, makes first end 41 of this axle collar 4 stretch in this breach 365.
Consult Fig. 3 to Fig. 5, this first end 41 has first part, 441 and one second portion 442 away from this second end 42 of an inner circle wall 440, contiguous this second end 42, this inner circle wall 440 is provided with separated vertically ring-type bump 46 of plural number and the position groove 460 between adjacent two bumps 46, and each bump 46 is generally triangular in shape with the section system of each groove 460; Consult shown in Figure 5, in the present embodiment, this plural number groove 460 is to comprise plural number first annular groove 461 and position plural number second annular groove 462 on second portion 442 of position on first part 441, each first annular groove 461 is to form the cross section external form of right-angled triangle and have the inclined-plane 463,464 of one side to internal ring portion 363 with each second annular groove 462, wherein, the inclined-plane 463 of each first annular groove 461 is towards first part 441, and the inclined-plane 464 of each second annular groove 462 is towards second portion 442.
Each utmost point piece 5 has a center hole 51, but this center hole 51 is an engage sleeves on the periphery wall 364 of the internal ring portion 363 of this lid 3 and in the axle envelope chamber 8 of position at this recess 36, but and each utmost point piece 5 be to make by the material of magnetic conduction; Each magnet 6 cording has a center hole 61, but this center hole 61 be engage sleeves on the periphery wall 364 of the internal ring portion 363 of this lid 3 and the position in this envelope chamber 8, and each magnet 6 is to be configured between adjacent two utmost point pieces 5; In the present embodiment, this three utmost points piece 5 is to be installed in alternately in this envelope chamber 8 with this two magnet 6; Cording has a seal clearance 71 between the inner circle wall 440 of each utmost point piece 5 and this first end 41 again, fills the magnetic fluid 7 by opening 381 injections of this lid 3 in the sealing gap 71, and this opening 381 can be by a stopper 382 sealing (see figure 4)s.
The magnetic current axon envelope 10 that constitutes according to the utility model, wherein, this lid 3 and this axle collar 4 are can be assembled in this pump case 1 and this rotating shaft 2 individually expediently and combine individually; Moreover the inner circle wall 440 of first end 41 of this axle collar 4 is provided with the general plural bump 46 triangular in shape of section, makes the magnetic flux of magnet 6 can concentrate on this plural number bump 46 and sentences and strengthen keeping magnetic fluid 7 in gap 71; In addition, since the inclined-plane 463 of first annular groove 461 be towards first partly the inclined-plane 464 of 441 and second annular groove 462 towards second portion 442, so, the magnetic fluid 7 of position in this first annular groove 461 and second annular groove 462 be the tendency of first end, 41 central flows of oriented these axle collars 4 individually, that is, magnetic fluid 7 if will by first annular groove 461 to first partly 441 the outside flow out or by second annular groove 461 when flow out in the outside of second portion 442, stopped by the flat sides set 465 of each annular groove, can prevent effectively that magnetic fluid 7 from leaking from axle envelope chamber 8.
Consult Fig. 6, the magnetic current axon envelope 10 that demonstration constitutes according to the utility model second embodiment, its inside and outside both sides pressure reduction applicable to this envelope is little or do not have the environment of pressure reduction, and first embodiment's axle envelope 10 is to be applicable to the big environment of axle envelope inside and outside both sides pressure reduction; The present embodiment and first embodiment's difference is that mainly this lid 3 need not use the screw 35 of Fig. 3 to be fixed on the pump case 1, and the axle collar 4 can be combined in corotation in this rotating shaft 2 and also need not utilize coupling unit shown in Figure 4 481 to be fixed in this rotating shaft 2 by the friction of this elasticity O type ring 432.
Consult Fig. 7 to Figure 10, show the magnetic current axon envelope 10 that constitutes according to the utility model the 3rd embodiment, present embodiment and first embodiment's difference is that mainly this lid 3 and the axle collar 4 are individually by separable two parts involutory composition; The lid 3 of present embodiment is by the identical substantially first cover body part 3a of structure and second cover body part 3b is involutory forms, general semicircular in shape shape of this two cover body part and the slotted eye 334,335 that has a semicircle individually, after this lid 3 of the involutory composition of this two cover body part, this two slotted eye 334,335 is formed the axis hole 33 of this lid 3; Two ends of each cover body part have an interface 391 individually, has the groove 392 that without exception is the ㄈ shape on each interface 391, insert a pair of liner 39 that should groove shapes in each two groove 392, when involutory this lid 3 of composition of this two cover body part, these two liners, 39 salable these two interfaces 391; Two ends of each cover body part extend connecting parts 393 individually again, wherein, the inner face of the connecting part 393 of cover body part 3a has a protuberance 394 and two grooves 395, and this protuberance 394 and this groove 395 are can be individually to be connected with 397 pairings of two protuberances with a groove 396 that the inner face of the connecting part 393 of cover body part 3b has; This axle collar 4 is by the identical substantially first collar part 4a of structure and second collar part 4b is involutory forms, general semicircular in shape shape of this two collar part and the slotted eye 434,435 that has a semicircle individually, after this axle collar 4 of the involutory composition of this two collar part, this two slotted eye 434,435 is formed the axis hole 43 of this axle collar 4; Two ends of each collar part have an interface 491 individually, has the groove 492 that without exception is the ㄣ shape on each interface 491, insert a pair of liner 49 that should groove shapes in each groove 492, when involutory this axle collar 4 of composition of this two collar part, these two liners, 49 salable these two interfaces 491.The lid of being made up of this two cover body part 3 and the axle collar of being made up of this two collar part 4 are the disassembly and assembly of favourable this envelope 10, that is, when needing repairing, can directly this two cover body part be disassembled and carry out, need not disassemble motor or other assembly (not icon) that this rotating shaft 2 is connected.There is no at the inner circle wall 440 of first end 41 of the 3rd embodiment's the axle collar 4 this plural number bump 46 and the general groove 460 triangular in shape of plural section are set, but, as shown in figure 11, the inner circle wall 440 of first end 41 of the 3rd embodiment's the axle collar 4 also can be provided with this plural number bump 46 and the general groove 460 triangular in shape of plural section.In addition, there is no on the 3rd embodiment's the lid 3 and penetration hole shown in Figure 1 34 is set locks in order to screw 35 to be provided, go up in order to provide screw 494 location (see figure 8)s but be combined in the first cover body part 3a and the second cover body part 3b, make screw 494 can lock on this pump case 1 and this lid 3 is fixed on this pump case 1 by plural connecting plate 493.
Consult Figure 12 to Figure 16, show the magnetic current axon envelope 10 that constitutes according to the utility model the 5th embodiment; The magnetic current axon envelope 10 of present embodiment is a pair of shaft seal structure, it comprises the lid 3 and the axle collar 4, define one first envelope chamber 81 and one second envelope chamber 82 between this lid 3 and the axle collar 4, take in three separated ring-type utmost point pieces 5, two ringshaped magnets 6 individually and can be the magnetic fluid 7 that flux circuit attracts in each envelope chamber 81,82; The configuration kenel system of this ring of numbers shape utmost point piece 5, this two ringshaped magnet 6 and this magnetic fluid 7 is identical with first embodiment explanation.
In the present embodiment, the inwall of the recess 36 of this lid 3 system forms the scalariform kenel and comprises first envelope groove 367 of contiguous this lid the inner 31 and second envelope groove 368 of contiguous this lid outer end 32, and these two envelope grooves 367,368 are separated; Again on this lid 3 and be provided with the position these two the envelope grooves 367, between 368 and with these two the envelope grooves 367,368 cooling liquid inlet 369 and one cooling liquid outlets 360 that are communicated with, extraneous cooling liquid can be entered the mouth by this and 369 flow in this recess 36 and from this outlet 360 and flow out in order to the cooling position at first envelope chamber 81 and second assembly that seals in the chamber 82, other is provided with sealing retaining 398 at a side of the contiguous cooling liquid outlet 360 of these recess 36 inwalls, and the cooling liquid in flowing into recess 36 can be clashed into this sealing retaining 398 and guided successfully to flow out from this outlet 360 by this sealing retaining 398 by this cooling liquid outlet 360 time.
In the present embodiment, first end 41 of this axle collar 4 is to insert in first envelope groove 367 of this recess 36, makes that having one between this first end 41 and this internal ring portion 363 constitutes this first annulus (seeing Figure 15) that seals chamber 81; And the part of second end 42 of this axle collar 4 system inserts in second envelope groove 368 of this recess 36, makes to have an annulus that constitutes this second envelope chamber 82 between the part of this second end 42 and this outer portion 361; The outside of the part of second end 42 of this axle collar 4 and be provided with the separated vertically ring-type bump 46 of plural number and the groove 460 of position between adjacent two bumps 46 again, have a seal clearance 71 between utmost point piece 5 in this bump 46 and the second envelope groove 368 and the magnet 6, fill magnetic fluids 7 in the sealing gap 71 in order to the formation magnet fluid sealing; Other is provided with the radially separated groove 411 of plural number (seeing Figure 16) in the outside of first end 41 of this axle collar 4, when the axle collar 4 is assembled in this rotating shaft 2 and when rotating, by the agitaion that these groove 411 rotations are produced, make the cooling liquid that flows in the recess 36 to flow along the sense of rotation generation of rotating shaft 2.
Consult Figure 17 to Figure 20, show the magnetic current axon envelope 10 that constitutes according to the utility model the 6th embodiment; This embodiment's axle envelope 10 is except the members such as lid 3, the axle collar 4, utmost point piece 5, magnet 6, magnetic fluid 7 and axle envelope chamber 8 with first embodiment, and further comprise a mechanical shaft seal 9, this mechanical shaft seal 9 is to be installed between the inner 31 of this lid 3 and this pump case 1 in the formed envelope chamber 90, and this mechanical shaft seal 9 has an axle sleeve 91, a rotating ring 92, a retaining ring 93 and plural spring 94; This axle sleeve 4 is to wear and be fixed in this rotating shaft 2, and this axle sleeve 4 also extends through this lid 3 and provides this axle collar 4 to wear fixing; This retaining ring 93 is to be installed on this axle sleeve 91 and to be radially positioned in this lid 3, this rotating ring 92 is to be positioned on this axle sleeve 91 and can to rotate along with this axle sleeve 91, and this rotating ring 92 is to fit to be contacted with this retaining ring 93, and should plural number spring 94 be to see through a packing ring 95 to be butted on this retaining ring 93 in order to this retaining ring 93 is applied forward elastic force, make rotating ring 92 closely contact break-in to keep the adaptation of this mechanical shaft seal 9 with this retaining ring 93.
Above stated specification only is to describe at specific preferred embodiment of the present utility model, according to design spirit of the present utility model is can do multiple variation or revise embodiment, for example, ring-type utmost point piece 5 can be done change according to need with the number of ringshaped magnet 6, is not limited by embodiment.So,, will be incorporated within the claim that the utility model advocates for being familiar with obvious replacement and the modification that this skill personage can do.
Claims (14)
1. a magnetic current axon envelope is characterized in that, comprises:
One lid, it can be combined in inside has on the pump case of rotating shaft, this lid has the axis hole that this two end is run through in the inner towards this pump case, an outer end and, this axis hole can pass for this rotating shaft, and this lid outer end is provided with an annular recessed portion, this annular recessed portion and this axis hole have same axis, and this recess is separated into an outer portion and an internal ring portion with this lid outer end, and this internal ring portion has a periphery wall;
One axle collar, its can be combined in this rotating shaft outside and with this rotating shaft corotation, this axle collar has first end and one second end towards this lid, first end of this axle collar inserts in the recess of this lid, first end of this axle collar has an inner circle wall, has an envelope chamber between this inner circle wall and this lid internal ring portion periphery wall;
One ringshaped magnet, it is enclosed within on the periphery wall of internal ring portion of this lid and to be installed in this envelope indoor;
Two utmost point pieces, it is enclosed within on the periphery wall of internal ring portion of this lid and to be installed in this envelope indoor, this two utmost points piece position two sides of this magnet and and this flange inner circle wall between have a gap; And
Magnetic fluid, it is filled in the indoor and gap between this utmost point piece and this flange of this envelope.
2. magnetic current axon envelope as claimed in claim 1 is characterized in that, but this utmost point piece, this lid and this axle collar system are made by the material of magnetic conduction individually; The inner circle wall of this axle collar first end is provided with separated vertically ring-type bump of plural number and the position groove between adjacent two bumps.
3. magnetic current axon envelope as claimed in claim 2 is characterized in that this axle collar first end has the first portion and the second portion away from this axle collar second end of contiguous this axle collar second end; This plural number groove comprise the position in the first portion of this first end first annular groove and the position at second annular groove of the second portion of this first end, this first annular groove and second annular groove system form the cross section external form of right-angled triangle and have the inclined-plane of one side to internal ring portion individually, the inclined-plane system of each first annular groove is towards this first portion, and the inclined-plane of each second annular groove system is towards this second portion.
4. magnetic current axon envelope as claimed in claim 3 is characterized in that this envelope further comprises one second magnet and one the 3rd utmost point piece, and it is indoor that this three utmost points piece and this two magnet system are installed in this envelope alternately.
5. magnetic current axon envelope as claimed in claim 4, it is characterized in that, the axis hole of this axle collar forms an expansion section at the first end place, make to have an annulus that constitutes this envelope chamber between this axle collar first end and this internal ring portion, and the longitudinal length of this expansion section equals the axial length of this internal ring portion.
6. magnetic current axon envelope as claimed in claim 5, it is characterized in that, further be provided with the separated engagement groove of plural equal angles on the outer end of this lid and count the staggered penetration hole of engagement groove, and have plural screw correspondence to pass each penetration hole and lock the end of this pump case and lid is fixed on the pump case with this; This axle collar is provided with an annular ditch groove and inserts individually in order to plural positioning plate to be provided, and these positioning plates are also aimed at combination in the engagement groove that inserts this lid.
7. magnetic current axon envelope as claimed in claim 1 is characterized in that, but this utmost point piece, this lid and this axle collar system are made by the material of magnetic conduction respectively; This lid comprises one first cover body part and one second cover body part, the two ends system of each cover body part has an interface individually, has a groove on each interface, this two cover body part system can this lid of the involutory composition of interface, and inserts a pair of liner that should groove shapes in the groove of this cover body part to seal this two interface; This axle collar system comprises one first collar part and one second collar part again, the two ends system of each collar part has an interface individually, has a groove on each interface, this two collar part system is with this axle collar of the involutory composition of interface, and inserts a pair of liner that should groove shapes in the groove of this two collar part to seal this two interface.
8. magnetic current axon envelope as claimed in claim 7 is characterized in that, the inner circle wall of this axle collar first end is provided with separated vertically ring-type bump of plural number and the position groove between adjacent two bumps.
9. magnetic current axon envelope as claimed in claim 8, it is characterized in that, this axle collar first end has first part and the second portion away from this axle collar second end of contiguous this axle collar second end, this plural number groove system comprise the position in first annular groove of the first portion of this first end and position second annular groove at the second portion of this first end, this first annular groove and second annular groove system form the cross section external form of right-angled triangle and have the inclined-plane of one side to internal ring portion individually, the inclined-plane system of each first annular groove is towards this first portion, and the inclined-plane of each second annular groove system is towards this second portion.
10. magnetic current axon envelope as claimed in claim 1, it is characterized in that, the part of second end of this axle collar system insert in the recess of this lid and and this outer portion between have one second envelope chamber, this second an indoor ringshaped magnet, two utmost point piece and the magnetic fluids taken in of envelope are in the gap of this magnetic fluid between this utmost point piece and this outer portion.
11. magnetic current axon envelope as claimed in claim 10, it is characterized in that, this lid is provided with a cooling liquid inlet and a cooling liquid outlet that is communicated with this second envelope groove, and be provided with sealing retaining at a side of this cooling liquid outlet of vicinity of this recess inwall, make to flow into that cooling liquid in this recess can be clashed into this sealing retaining by this cooling liquid outlet the time and from this outlet outflow; The outside of first end of this axle collar is provided with the radially separated groove of plural number in order to stir the cooling liquid in this recess.
12. magnetic current axon envelope as claimed in claim 10, it is characterized in that, the outside system of the part of second end of this axle collar is provided with separated vertically ring-type bump of plural number and the position groove between adjacent two bumps, have a seal clearance between utmost point piece in this bump and the second envelope groove and the magnet, this magnetic fluid is filled in the sealing gap.
13. magnetic current axon as claimed in claim 3 envelope is characterized in that, further comprises a mechanical shaft seal, it is indoor that this mechanical shaft seal can be installed between the inner of this lid and this pump case a formed envelope; This mechanical shaft seal has an axle sleeve, a rotating ring and retaining ring; This axle sleeve wears and is fixed in this rotating shaft, and this axle sleeve extends through this lid and provide this axle collar to wear fixing; Should be fixedly ring system be installed on this axle sleeve and be positioned in this lid, this rotating ring is positioned on this axle sleeve and can rotates along with this axle sleeve, and this rotation ring system applying is contacted with this retaining ring.
14. magnetic current axon envelope as claimed in claim 13 is characterized in that this mechanical shaft seal further comprises plural spring, this plural number spring sees through a packing ring and is butted on this retaining ring in order to this retaining ring is applied forward elastic force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200007039U CN201354756Y (en) | 2009-01-09 | 2009-01-09 | Magnetic fluid shaft seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200007039U CN201354756Y (en) | 2009-01-09 | 2009-01-09 | Magnetic fluid shaft seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201354756Y true CN201354756Y (en) | 2009-12-02 |
Family
ID=41411097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200007039U Expired - Fee Related CN201354756Y (en) | 2009-01-09 | 2009-01-09 | Magnetic fluid shaft seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201354756Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949386A (en) * | 2010-09-29 | 2011-01-19 | 北京化工大学 | Stability control device for centrifugal compressor |
| CN102606745A (en) * | 2012-04-06 | 2012-07-25 | 哈尔滨工业大学 | Magnetic fluid multi-pole multi-level sealing device based on toothed groove structure |
| CN102619990A (en) * | 2012-04-06 | 2012-08-01 | 哈尔滨工业大学 | Multipole magnetic fluid sealing device based on toothed groove structure |
| CN106195278A (en) * | 2016-08-30 | 2016-12-07 | 自贡兆强环保科技股份有限公司 | A kind of high speed cold blower fan magnetic fluid seal device |
| CN107893855A (en) * | 2017-12-13 | 2018-04-10 | 广西科技大学 | A kind of recessed multi-diameter shaft device for sealing magnetic fluid |
-
2009
- 2009-01-09 CN CNU2009200007039U patent/CN201354756Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949386A (en) * | 2010-09-29 | 2011-01-19 | 北京化工大学 | Stability control device for centrifugal compressor |
| CN101949386B (en) * | 2010-09-29 | 2014-01-01 | 北京化工大学 | Stability control device for centrifugal compressor |
| CN102606745A (en) * | 2012-04-06 | 2012-07-25 | 哈尔滨工业大学 | Magnetic fluid multi-pole multi-level sealing device based on toothed groove structure |
| CN102619990A (en) * | 2012-04-06 | 2012-08-01 | 哈尔滨工业大学 | Multipole magnetic fluid sealing device based on toothed groove structure |
| CN106195278A (en) * | 2016-08-30 | 2016-12-07 | 自贡兆强环保科技股份有限公司 | A kind of high speed cold blower fan magnetic fluid seal device |
| CN106195278B (en) * | 2016-08-30 | 2017-11-28 | 自贡兆强环保科技股份有限公司 | A kind of high speed air-cooler magnetic fluid seal device |
| CN107893855A (en) * | 2017-12-13 | 2018-04-10 | 广西科技大学 | A kind of recessed multi-diameter shaft device for sealing magnetic fluid |
| CN107893855B (en) * | 2017-12-13 | 2023-05-02 | 广西科技大学 | Concave stepped shaft magnetic fluid sealing device |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20091202 Termination date: 20180109 |
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| CF01 | Termination of patent right due to non-payment of annual fee |