CN103115152B - Magnetic fluid and maze alternated type combined sealing - Google Patents
Magnetic fluid and maze alternated type combined sealing Download PDFInfo
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- CN103115152B CN103115152B CN201310035109.4A CN201310035109A CN103115152B CN 103115152 B CN103115152 B CN 103115152B CN 201310035109 A CN201310035109 A CN 201310035109A CN 103115152 B CN103115152 B CN 103115152B
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Abstract
The invention provides magnetic fluid and maze alternated type combined sealing and belongs to a sealing device of a rotary shaft. The magnetic fluid and maze alternated type combined sealing solve the problem of leakage of a large-gap rotary shaft. A shaft of the magnetic fluid and maze alternated type combined sealing is a stepped shaft, magnetic field force which is produced by 1-N permanent magnets is utilized, the magnetic fluid is filled among 1-N pole shoes and 1-N steps of the stepped shaft to achieve sealing of the 1-N magnetic fluid, a space which is formed by surrounding of the stepped shaft, the 1-N permanent magnets, and the pole shoes on both sides is designed to be a 1-N-1 expansion sealing cavity of maze sealing to achieve the magnetic fluid and maze alternated type combined sealing. The magnetic fluid and maze alternated type combined sealing overcomes the defect that maze sealing can not achieve zero leakage, reduces loss of the magnetic fluid when sealing is not valid, simultaneously improves voltage endurable capability of sealing of the magnetic fluid under a large-gap condition, and expands a safe working scope. The magnetic fluid and maze alternated type combined sealing is compact in structure, and easy to install, and is an ideal sealing method which is used for solving the problem of leakage of the rotary shaft under the large-gap condition.
Description
Technical field
The invention belongs to sealing field of mechanical engineering, particularly a kind of magnetic liquid and labyrinth alternate type combination seal.
Background technique
In many occasions, as the sealing for 500mm major diameter running shaft machinery, because the major diameter main shaft rotated causes rotating shaft to be usually not less than 0.4mm circular runout, and the too small meeting of seal clearance causes the wearing and tearing of rotating shaft and shell and cause the inefficacy that seals, so generally monolateral seal clearance is not less than 0.4mm.Although magnetic fluid sealing has zero leakage, the advantages such as reliability height and life-span length, gap is larger, and the voltage endurance capability of magnetic fluid sealing is less, therefore, improves wide arc gap condition magnetic hydraulic seal performance and has great importance.
Summary of the invention
Technical problem to be solved by this invention is exactly, and provides a kind of magnetic liquid and labyrinth alternate type combination seal, for solving the leakage problem of wide arc gap running shaft.
Technological scheme of the present invention is:
A kind of magnetic liquid and labyrinth alternate type combination seal, this alternate type combination seal comprises:
Axle, shell, first, second magnetism resistent ring, first are to N pole shoe, first to N rubber ring, first to N-1 permanent magnet, first and second bearing, end cap, first, second jump ring.
Described axle is a multidiameter shaft.
First is arranged on respectively in the groove on N pole shoe cylindrical to N rubber ring by first.
Between first, second magnetism resistent ring, order installation the first pole shoe, the first permanent magnet, the second pole shoe, the second permanent magnet, the 3rd pole shoe,
The rest may be inferred
N-1 permanent magnet and N pole shoe;
Described in being injected by magnetic liquid first, on N pole shoe inner headed face, forms N level black box, is enclosed within axle;
Again first, second bearing is arranged on the axle outside first, second magnetism resistent ring respectively, first, second jump ring is arranged on respectively on axle in the groove of left end and the groove of right-hand member; Again the N level black box be arranged on axle is installed in the enclosure, by be threaded compression second bearing outer ring of end cap with shell;
First pole shoe of N level black box is arranged on the cylindrical of the first ladder of multidiameter shaft;
Second pole shoe of N level black box is arranged on the cylindrical of the second ladder of multidiameter shaft;
3rd pole shoe of N level black box is arranged on the cylindrical of the 3rd ladder of multidiameter shaft;
The rest may be inferred
The N pole shoe of N level black box is arranged on the cylindrical of N ladder of multidiameter shaft;
The space that first pole shoe, the first permanent magnet, the second pole shoe and the second ladder surround is the first Expansion sealing chamber;
The space that second pole shoe, the second permanent magnet, the 3rd pole shoe and the 3rd ladder surround is the second Expansion sealing chamber;
The rest may be inferred
The space that N-1 pole shoe, N-1 permanent magnet, N pole shoe and N ladder surround is N-1 Expansion sealing chamber;
Magnetic fluid sealing between first pole shoe and the first ladder of multidiameter shaft and the first Expansion sealing chamber form magnetic liquid and labyrinth first order combination seal; Magnetic fluid sealing between second pole shoe and the second ladder of multidiameter shaft and the second Expansion sealing chamber form magnetic liquid and the second level, labyrinth combination seal;
The rest may be inferred
Magnetic fluid sealing between N-1 pole shoe and the N-1 ladder of multidiameter shaft and N-1 Expansion sealing chamber form magnetic liquid and labyrinth N-1 level combination seal;
N is 2 ~ 20.
Magnetic liquid and labyrinth alternate type combination seal is realized by assembling above.
Beneficial effect of the present invention:
By the axle in magnetic fluid sealing is designed to multidiameter shaft, profile design between pole shoe and pole shoe internal diameter is stepped, and by its permanent magnet, the pole shoe of permanent magnet both sides, and the spatial design between multidiameter shaft is the Expansion sealing cavity configuration of labyrinth seal, realize magnetic liquid and labyrinth alternate type combination seal.Instant invention overcomes the shortcoming that labyrinth seal cannot realize zero leakage, decrease the loss of the magnetic liquid when seal failure, improve the voltage endurance capability of wide arc gap condition magnetic hydraulic seal, expand its range of safety operation.Therefore, it is a kind of desirable seal method for solving wide arc gap condition Shaft leakage problem.This magnetic liquid and labyrinth alternate type combined sealing structure compact, be easy to install.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of N level magnetic liquid and labyrinth alternate type combination seal.
Fig. 2 is the schematic diagram of a kind of secondary magnetic liquid and labyrinth alternate type combination seal.
Fig. 3 is the schematic diagram of a kind of three grades of magnetic liquids and labyrinth alternate type combination seal.
Fig. 4 is the schematic diagram of a kind of three grades of magnetic liquids and labyrinth alternate type combination seal axle.
Fig. 5 is the partial enlarged drawing at Fig. 3 a place.
Fig. 6 is a kind of three grades of magnetic liquids with pole tooth and labyrinth alternate type combination seal schematic diagram.
Fig. 7 is a kind of three grades of magnetic liquids and labyrinth alternate type combination seal schematic diagram of pole shoe band taper hole.
Fig. 8 is with three of pole tooth grades of magnetic liquids and labyrinth alternate type combination seal schematic diagram on pole shoe taper hole.
Fig. 9 is a kind of level Four magnetic liquid and labyrinth alternate type combination seal schematic diagram.
Figure 10 is a kind of ten grades of magnetic liquids and labyrinth alternate type combination seal schematic diagram.
Figure 11 is a kind of 20 grades of magnetic liquids and labyrinth alternate type combination seal schematic diagram.
Embodiment
The invention will be further described by reference to the accompanying drawings.
Mode of execution one
A kind of magnetic liquid and labyrinth alternate type combination seal, as shown in Figure 1, this alternate type combination seal comprises: axle 1, shell 2, first, second magnetism resistent ring 6,10, first to N pole shoe 7-1,7-2 ... 7-N, first to N rubber ring 8-1,8-2 ..., 8-N, first to N-1 permanent magnet 9-1,9-2 ..., 9-(N-1), first and second bearing 5,11, end cap 12, first, second jump ring 4,13.
Described axle 1 is a multidiameter shaft, and the material of multidiameter shaft is 2cr13 stainless steel.
The material of described shell 2 is non-magnetic stainless steel.
Described first to N pole shoe 7-1,7-2 ... the material of 7-N is 2cr13 stainless steel.
Described first to N-1 permanent magnet 9-1,9-2 ..., 9-(N-1) material be NdFeB material.
By first to N rubber ring 8-1,8-2 ..., 8-N is arranged on first to N pole shoe 7-1 respectively, 7-2 ..., in groove on 7-N cylindrical.
Between first, second magnetism resistent ring 6,10, order install the first pole shoe 7-1, the first permanent magnet 9-1, the second pole shoe 7-2, the second permanent magnet 9-2, the 3rd pole shoe 7-3,
The rest may be inferred
N-1 permanent magnet 9-(N-1), N pole shoe 7-N;
Described in being injected by magnetic liquid first, on N pole shoe inner headed face, forms N level black box, is enclosed within axle 1; Described magnetic liquid is machine oil based magnetic liquid, ester group magnetic liquid or Polydimethylsiloxane--based Ferrofluids, specifically select which kind of magnetic liquid to determine by by the medium that seals and its pressure size, but this is not emphasis of the present invention.
Again first, second bearing 5,11 is arranged on the axle outside first, second magnetism resistent ring 6,10 respectively, first, second jump ring 4,13 is arranged on respectively in the groove 4-1 of axle 1 left end and the groove 4-2 of right-hand member; Again the N level black box be arranged on axle 1 is arranged in shell 2, by be threaded compression second bearing 11 outer ring of end cap 12 with shell 2;
First pole shoe 7-1 of N level black box is arranged on the cylindrical of the first ladder 1-1 of multidiameter shaft;
Second pole shoe 7-2 of N level black box is arranged on the cylindrical of the second ladder 1-2 of multidiameter shaft;
3rd pole shoe 7-3 of N level black box is arranged on the cylindrical of the 3rd ladder 1-3 of multidiameter shaft;
The rest may be inferred
The N pole shoe 7-N of N level black box is arranged on the cylindrical of N ladder 1-N of multidiameter shaft;
The space that first pole shoe 7-1, the first permanent magnet 9-1, the second pole shoe 7-2 and the second ladder 1-2 surround is the first Expansion sealing chamber 14-1;
The space that second pole shoe 7-2, the second permanent magnet 9-2, the 3rd pole shoe 7-3 and the 3rd ladder 1-3 surround is the second Expansion sealing chamber 14-2;
The rest may be inferred
N-1 pole shoe 7-(N-1), N-1 permanent magnet 9-(N-1), the space that surrounds of N pole shoe 7-N and N ladder 1-N is N-1 Expansion sealing chamber 14-(N-1);
Magnetic fluid sealing between first pole shoe 7-1 and the first ladder 1-1 of multidiameter shaft and the first Expansion sealing chamber 14-1 form magnetic liquid and labyrinth first order combination seal; Magnetic fluid sealing between second pole shoe 7-2 and the second ladder 1-2 of multidiameter shaft and the second Expansion sealing chamber 14-2 form magnetic liquid and the second level, labyrinth combination seal;
The rest may be inferred
N-1 pole shoe 7-(N-1) and the N-1 ladder 1-(N-1 of multidiameter shaft) between magnetic fluid sealing and N-1 Expansion sealing chamber 14-(N-1) form magnetic liquid and labyrinth N-1 level combination seal;
N is 2 ~ 20;
Magnetic liquid and labyrinth alternate type combination seal is realized by assembling above.
First ladder 1-1 axial length of described multidiameter shaft is that the shaft shoulder left surface 15 of the axial length of the first magnetism resistent ring 6, the axial length of the first pole shoe 7-1, the right flank 16 of the first pole shoe 7-1 and the second ladder is apart from sum;
Second ladder 1-2 axial length of multidiameter shaft is the axial length of the first permanent magnet 9-1 and the axial length sum of the second pole shoe 7-2;
3rd ladder 1-3 axial length of multidiameter shaft is the axial length of the second permanent magnet 9-2 and the axial length sum of the 3rd pole shoe 7-3;
The rest may be inferred
The N ladder 1-N axial length of multidiameter shaft is N-1 permanent magnet 9-(N-1) axial length and the axial length sum of N pole shoe 7-N;
The difference of the diameter of axle of adjacent two ladders is 2 ~ 12mm.
The right flank 16 of the first described pole shoe 7-1 and the shaft shoulder left surface 15 of the second ladder are 0.1 ~ 2.0mm apart from Lg.
Described first to N pole shoe 7-1,7-2 ..., the inner headed face of 7-N and first of described multidiameter shaft be 0.4 ~ 2.0mm to the matching gap of N ladder 1-1,1-2 ... 1-N periphery.
Described first to N-1 permanent magnet 9-1,9-2 ... the external diameter of 9-(N-1) is all equal;
First to N-1 Expansion sealing chamber 14-1,14-2 ..., 14-(N-1) radial length equal, be 6 ~ 30mm.
Described first to N pole shoe 7-1,7-2 ..., 7-N endoporus on process pole tooth, pole number of teeth amount is 2 ~ 10.
Described first to N pole shoe 7-1,7-2 ..., 7-N endoporus be taper hole, tapering is tapering is 1:10 ~ 1:0.25.
Described first to N pole shoe 7-1,7-2 ..., 7-N taper hole in, process pole tooth, pole number of teeth amount is 2 ~ 10.
The first described ladder 1-1 axial length is that the shaft shoulder left surface 15 of the axial length of the first magnetism resistent ring 6, the axial length of the first pole shoe 7-1, the right flank 16 of the first pole shoe 7-1 and the second ladder is apart from sum;
Second ladder 1-2 axial length is the axial length of the first permanent magnet 9-1 and the axial length sum of the second pole shoe 7-2;
3rd ladder 1-3 axial length is the axial length of the second permanent magnet 9-2 and the axial length sum of the 3rd pole shoe 7-3;
The rest may be inferred
N ladder 1-N axial length is N-1 permanent magnet 9-(N-1) axial length and the axial length sum of N pole shoe 7-N;
The difference of the diameter of axle of adjacent two ladders is 2 ~ 12mm.
The right flank 16 of the first described pole shoe 7-1 and the shaft shoulder left surface 15 of the second ladder are 0.1 ~ 2.0mm apart from Lg.
Described first to N pole shoe 7-1,7-2 ..., the inner headed face of 7-N and first of described multidiameter shaft be 0.4 ~ 2.0mm to the matching gap of N ladder 1-1,1-2 ... 1-N periphery.
Described first to N-1 permanent magnet 9-1,9-2 ... the external diameter of 9-(N-1) is all equal;
First to N-1 Expansion sealing chamber 14-1,14-2 ..., 14-(N-1) radial length equal, be 6 ~ 30mm.
Mode of execution two
The difference of mode of execution two and mode of execution one: described first to N pole shoe 7-1,7-2 ..., 7-N endoporus on process pole tooth, pole number of teeth amount is 2 ~ 10.
Mode of execution three
The difference of mode of execution three and mode of execution one: described first to N pole shoe 7-1,7-2 ..., 7-N endoporus be taper hole, tapering is 1:10 ~ 1:0.25.
Mode of execution four
The difference of mode of execution four and mode of execution three: described first to N pole shoe 7-1,7-2 ..., 7-N taper hole in, process pole tooth, pole number of teeth amount is 2 ~ 10.
Mode of execution five
A kind of magnetic liquid and labyrinth alternate type combination seal, as shown in Figure 2, this alternate type combination seal comprises: axle 1, shell 2, first, second magnetism resistent ring 6,10, first, second pole shoe 7-1,7-2, first, second rubber ring 8-1,8-2, first permanent magnet 9-1, first and second bearing 5,11, end cap 12, first, second jump ring 4,13.Described axle 1 is a multidiameter shaft.
First, second rubber ring 8-1,8-2 are arranged on respectively in the groove on first, second pole shoe 7-1,7-2 cylindrical.
Between first, second magnetism resistent ring 6,10, order installs the first pole shoe 7-1, the first permanent magnet 9-1, the second pole shoe 7-2.
On first, second pole shoe inner headed face described in magnetic liquid is injected, form secondary seal assembly, be enclosed within axle 1.
Again first, second bearing 5,11 is arranged on respectively on the axle at first, second magnetism resistent ring 6,10 two ends, first, second jump ring 4,13 is arranged on respectively in the groove 4-1 of axle 1 left end and the groove 4-2 of right-hand member; Again the black box be arranged on axle 1 is arranged in shell 2, by be threaded compression second bearing 11 outer ring of end cap 12 with shell 2.
First pole shoe 7-1 of secondary seal assembly is arranged on the cylindrical of the first ladder 1-1 of multidiameter shaft;
Second pole shoe 7-2 of secondary seal assembly is arranged on the cylindrical of the second ladder 1-2 of multidiameter shaft.
The space that first pole shoe 7-1, the first permanent magnet 9-1, the second pole shoe 7-2 and the second ladder 1-1 surround is the first Expansion sealing chamber 14-1.
Magnetic fluid sealing between first pole shoe 7-1 and the first ladder 1-1 of multidiameter shaft and the first Expansion sealing chamber 14-1 form magnetic liquid and labyrinth first order combination seal.
The difference of the diameter of axle of adjacent two ladders is 2mm.The right flank 16 of the first described pole shoe 7-1 and the shaft shoulder left surface 15 of the second ladder are 0.1mm apart from Lg.The matching gap of the inner headed face of described first, second pole shoe 7-1,7-2 and first, second ladder 1-1,1-2 periphery of described multidiameter shaft is 0.4mm.
The radial length of the first Expansion sealing chamber 14-1 is equal, is 6mm.
Magnetic liquid and labyrinth alternate type combination seal is realized by assembling above.
Mode of execution six
A kind of magnetic liquid and labyrinth alternate type combination seal, as shown in Figure 3, this alternate type combination seal comprises: axle 1, shell 2, first, second magnetism resistent ring the 6,10, first to the 3rd pole shoe 7-1,7-2,7-3, first to the 3rd rubber ring 8-1,8-2,8-3, first, second permanent magnet 9-1,9-2, first and second bearing 5,11, end cap 12, first, second jump ring 4,13.Described axle 1 is a multidiameter shaft.
First to the 3rd rubber ring 8-1,8-2,8-3 is arranged in the groove on first to the 3rd pole shoe 7-1,7-2,7-3 cylindrical respectively.
Between first, second magnetism resistent ring 6,10, order installs the first pole shoe 7-1, the first permanent magnet 9-1, the second pole shoe 7-2, the second permanent magnet 9-2, the 3rd pole shoe 7-3.
On the first to the 3rd pole shoe inner headed face described in magnetic liquid is injected, form three grades of black boies, be enclosed within axle 1.
Again first, second bearing 5,11 is arranged on respectively on the axle at first, second magnetism resistent ring 6,10 two ends, first, second jump ring 4,13 is arranged on respectively in the groove 4-1 of left end on the axle 1 and groove 4-2 of right-hand member; Again the black box be arranged on axle 1 is arranged in shell 2, by be threaded compression second bearing 11 outer ring of end cap 12 with shell 2.
First pole shoe 7-1 of three grades of black boies is arranged on the cylindrical of the first ladder 1-1 of multidiameter shaft;
Second pole shoe 7-2 of three grades of black boies is arranged on the cylindrical of the second ladder 1-2 of multidiameter shaft;
3rd pole shoe 7-3 of three grades of black boies is arranged on the cylindrical of the 3rd ladder 1-3 of multidiameter shaft.
The space that first pole shoe 7-1, the first permanent magnet 9-1, the second pole shoe 7-2 and the second ladder 1-1 surround is the first Expansion sealing chamber 14-1.
The space that second pole shoe 7-2, the second permanent magnet 9-2, the 3rd pole shoe 7-3 and the 3rd ladder 1-3 surround is the second Expansion sealing chamber 14-2.
Magnetic fluid sealing between first pole shoe 7-1 and the first ladder 1-1 of multidiameter shaft and the first Expansion sealing chamber 14-1 form magnetic liquid and labyrinth first order combination seal;
Magnetic fluid sealing between second pole shoe 7-2 and the second ladder 1-2 of multidiameter shaft and the second Expansion sealing chamber 14-2 form magnetic liquid and the second level, labyrinth combination seal.
The difference of the diameter of axle of adjacent two ladders is 4mm.The right flank 16 of the first described pole shoe 7-1 and the shaft shoulder left surface 15 of the second ladder are 1mm apart from Lg.The matching gap of the inner headed face of described first to the 3rd pole shoe 7-1,7-2,7-3 and first to the 3rd ladder 1-1,1-2,1-3 periphery of described multidiameter shaft is 0.6mm.
The radial length of first, second Expansion sealing chamber 14-1,14-2 is equal, is 8mm.
Three grades of magnetic liquids and secondary maze alternate type combination seal is realized by assembling above.
Mode of execution seven
A kind of magnetic liquid and labyrinth alternate type combination seal, as shown in Figure 9, this alternate type combination seal comprises: axle 1, shell 2, first, second magnetism resistent ring 6,10, first to fourth pole shoe 7-1,7-2,7-3,7-4, first to fourth rubber ring 8-1,8-2,8-3,8-4, first to the 3rd permanent magnet 9-1,9-2,9-3, first and second bearing 5,11, end cap 12, first, second jump ring 4,13.Described axle 1 is a multidiameter shaft.
First to fourth rubber ring 8-1,8-2,8-3,8-4 is arranged on respectively in the groove on first to fourth pole shoe 7-1,7-2,7-3,7-4 cylindrical.
Between first, second magnetism resistent ring 6,10, order installs the first pole shoe 7-1, the first permanent magnet 9-1, the second pole shoe 7-2, the second permanent magnet 9-2, the 3rd pole shoe 7-3, the 3rd permanent magnet 9-3, the 4th pole shoe 7-4.
On first to fourth pole shoe inner headed face described in magnetic liquid is injected, form level Four black box, be enclosed within axle 1.
Again first, second bearing 5,11 is arranged on respectively on the axle at first, second magnetism resistent ring 6,10 two ends, first, second jump ring 4,13 is arranged on respectively in the groove 4-1 of left end on the axle 1 and groove 4-2 of right-hand member; Again the black box be arranged on axle 1 is arranged in shell 2, by be threaded compression second bearing 11 outer ring of end cap 12 with shell 2.
First pole shoe 7-1 of level Four black box is arranged on the cylindrical of the first ladder 1-1 of multidiameter shaft;
Second pole shoe 7-2 of level Four black box is arranged on the cylindrical of the second ladder 1-2 of multidiameter shaft;
3rd pole shoe 7-3 of level Four black box is arranged on the cylindrical of the 3rd ladder 1-3 of multidiameter shaft;
4th pole shoe 7-4 of level Four black box is arranged on the cylindrical of four-step 1-4 of multidiameter shaft.
The space that first pole shoe 7-1, the first permanent magnet 9-1, the second pole shoe 7-2 and the second ladder 1-1 surround is the first Expansion sealing chamber 14-1.
The space that second pole shoe 7-2, the second permanent magnet 9-2, the 3rd pole shoe 7-3 and the 3rd ladder 1-3 surround is the second Expansion sealing chamber 14-2.
The space that 3rd pole shoe 7-3, the 3rd permanent magnet 9-3, the 4th pole shoe 7-4 and four-step 1-4 surround is the 3rd Expansion sealing chamber 14-3.
Magnetic fluid sealing between first pole shoe 7-1 and the first ladder 1-1 of multidiameter shaft and the first Expansion sealing chamber 14-1 form magnetic liquid and labyrinth first order combination seal;
Magnetic fluid sealing between second pole shoe 7-2 and the second ladder 1-2 of multidiameter shaft and the second Expansion sealing chamber 14-2 form magnetic liquid and the second level, labyrinth combination seal;
Magnetic fluid sealing between 3rd pole shoe 7-3 and the 3rd ladder 1-3 of multidiameter shaft and the 3rd Expansion sealing chamber 14-3 form magnetic liquid and labyrinth third level combination seal;
The difference of the diameter of axle of adjacent two ladders is 6mm.The right flank 16 of the first described pole shoe 7-1 and the shaft shoulder left surface 15 of the second ladder are 1.2mm apart from Lg.The matching gap of the inner headed face of first to fourth described pole shoe 7-1,7-2,7-3,7-4 and first to fourth ladder 1-1,1-2,1-3,1-4 periphery of described multidiameter shaft is 0.8mm.
The radial length of first to the 3rd Expansion sealing chamber 14-1,14-2,14-3 is equal, is 15mm.
Level Four magnetic liquid and labyrinth alternate type combination seal is realized by assembling above.
Mode of execution eight
A kind of magnetic liquid and labyrinth alternate type combination seal, as shown in Figure 6, the difference of mode of execution eight and mode of execution six: the endoporus of described first to the 3rd pole shoe 7-1,7-2,7-3 processes pole tooth, and pole number of teeth amount is the arbitrary number between 2 or 10 or 2 ~ 10.
Mode of execution nine
A kind of magnetic liquid and labyrinth alternate type combination seal, as shown in Figure 7, the difference of mode of execution nine and mode of execution six: the endoporus of described first to the 3rd pole shoe 7-1,7-2,7-3 is taper hole, and tapering is the arbitrary number between 1:10 or 1:0.25 or 1:10 ~ 1:0.25.
Mode of execution ten
A kind of magnetic liquid and labyrinth alternate type combination seal, as shown in Figure 8, the difference of mode of execution ten and mode of execution nine: in the taper hole of described first to the 3rd pole shoe 7-1,7-2,7-3, process pole tooth, pole number of teeth amount is 2 ~ 10, and pole number of teeth amount is the arbitrary number between 2 or 10 or 2 ~ 10.
Mode of execution 11
A kind of magnetic liquid and labyrinth alternate type combination seal, as shown in Figure 10, this alternate type combination seal comprises: axle 1, shell 2, first, second magnetism resistent ring the 6,10, first to the tenth pole shoe 7-1,7-2,7-3 ..., 7-9,7-10, the first to the tenth rubber ring 8-1,8-2,8-3 ..., 8-9,8-10, first to the 9th permanent magnet 9-1,9-2 ..., 9-9, first and second bearing 5,11, end cap 12, first, second jump ring 4,13.Described axle 1 is a multidiameter shaft.
By the first to the tenth rubber ring 8-1,8-2,8-3 ..., 8-9,8-10 be arranged on respectively the first to the tenth pole shoe 7-1,7-2,7-3 ..., in groove on 7-9,7-10 cylindrical.
Between first, second magnetism resistent ring 6,10, order installs the first pole shoe 7-1, the first permanent magnet 9-1, the second pole shoe 7-2, the second permanent magnet 9-2, the 3rd pole shoe 7-3, the rest may be inferred
9th pole shoe 7-9, the 9th permanent magnet 9-9, the tenth pole shoe 7-10.
On the first to the tenth pole shoe inner headed face described in magnetic liquid is injected, form ten grades of black boies, be enclosed within axle 1.
Again first, second bearing 5,11 is arranged on respectively on the axle at first, second magnetism resistent ring 6,10 two ends, first, second jump ring 4,13 is arranged on respectively in the groove 4-1 of left end on the axle 1 and groove 4-2 of right-hand member; Again the black box be arranged on axle 1 is arranged in shell 2, by be threaded compression second bearing 11 outer ring of end cap 12 with shell 2.
First pole shoe 7-1 of ten grades of black boies is arranged on the cylindrical of the first ladder 1-1 of multidiameter shaft;
Second pole shoe 7-2 of ten grades of black boies is arranged on the cylindrical of the second ladder 1-2 of multidiameter shaft;
3rd pole shoe 7-3 of ten grades of black boies is arranged on the cylindrical of the 3rd ladder 1-3 of multidiameter shaft;
The rest may be inferred
9th pole shoe 7-9 of ten grades of black boies is arranged on the cylindrical of the 9th ladder 1-9 of multidiameter shaft;
Tenth pole shoe 7-10 of ten grades of black boies is arranged on the cylindrical of the tenth ladder 1-10 of multidiameter shaft.
The space that first pole shoe 7-1, the first permanent magnet 9-1, the second pole shoe 7-2 and the second ladder 1-2 surround is the first Expansion sealing chamber 14-1;
The space that second pole shoe 7-2, the second permanent magnet 9-2, the 3rd pole shoe 7-3 and the 3rd ladder 1-3 surround is the second Expansion sealing chamber 14-2;
The rest may be inferred
The space that 9th pole shoe 7-9, the 9th permanent magnet 9-9, the tenth pole shoe 7-10 and the tenth ladder 1-10 surround is the 9th Expansion sealing chamber 14-9.
Magnetic fluid sealing between first pole shoe 7-1 and the first ladder 1-1 of multidiameter shaft and the first Expansion sealing chamber 14-1 form magnetic liquid and labyrinth first order combination seal;
Magnetic fluid sealing between second pole shoe 7-2 and the second ladder 1-2 of multidiameter shaft and the second Expansion sealing chamber 14-2 form magnetic liquid and the second level, labyrinth combination seal;
Magnetic fluid sealing between 3rd pole shoe 7-3 and the 3rd ladder 1-3 of multidiameter shaft and the 3rd Expansion sealing chamber 14-3 form magnetic liquid and labyrinth third level combination seal;
The rest may be inferred
Magnetic fluid sealing between 9th pole shoe 7-9 and the 9th ladder 1-9 of multidiameter shaft and the 9th Expansion sealing chamber 14-9 form magnetic liquid and the 9th grade, labyrinth combination seal;
Magnetic fluid sealing between tenth pole shoe 7-10 and the tenth ladder 1-10 of multidiameter shaft is the tenth grade of magnetic fluid sealing.
The difference of the diameter of axle of adjacent two ladders is 3mm.The right flank 16 of the first described pole shoe 7-1 and the shaft shoulder left surface 15 of the second ladder are 1.5mm apart from Lg.Described first to the tenth pole shoe 7-1,7-2 ..., the inner headed face of 7-10 and first of described multidiameter shaft be 1.2mm to the matching gap of the tenth ladder 1-1,1-2 ..., 1-10 periphery.
First to the 9th Expansion sealing chamber 14-1,14-2 ..., 14-9 radial length equal, be 20mm.
Ten grades of magnetic liquids and nine grades of labyrinth alternate type combination seals are realized by assembling above.
Mode of execution 12
A kind of magnetic liquid and labyrinth alternate type combination seal, as shown in figure 11, this alternate type combination seal comprises: axle 1, shell 2, first, second magnetism resistent ring 6,10, first to the 20 pole shoe 7-1,7-2,7-3 ..., 7-19,7-20, the first to the 20 rubber ring 8-1,8-2,8-3 ..., 8-19,8-20, first to the 19 permanent magnet 9-1,9-2 ..., 9-19, first and second bearing 5,11, end cap 12, first, second jump ring 4,13.Described axle 1 is a multidiameter shaft.
By the first to the 20 rubber ring 8-1,8-2,8-3 ..., 8-19,8-20 be arranged on respectively the first to the 20 pole shoe 7-1,7-2,7-3 ..., in groove on 7-19,7-20 cylindrical.
Between first, second magnetism resistent ring 6,10, order installs the first pole shoe 7-1, the first permanent magnet 9-1, the second pole shoe 7-2, the second permanent magnet 9-2, the 3rd pole shoe 7-3, the rest may be inferred
19 pole shoe 7-19, the 19 permanent magnet 9-19, the 20 pole shoe 7-20.
On the first to the 20 pole shoe inner headed face described in magnetic liquid is injected, form 20 grades of black boies, be enclosed within axle 1.
Again first, second bearing 5,11 is arranged on respectively on the axle at first, second magnetism resistent ring 6,10 two ends, first, second jump ring 4,13 is arranged on respectively in the groove 4-1 of left end on the axle 1 and groove 4-2 of right-hand member; Again the black box be arranged on axle 1 is arranged in shell 2, by be threaded compression second bearing 11 outer ring of end cap 12 with shell 2.
First pole shoe 7-1 of 20 grades of black boies is arranged on the cylindrical of the first ladder 1-1 of multidiameter shaft;
Second pole shoe 7-2 of 20 grades of black boies is arranged on the cylindrical of the second ladder 1-2 of multidiameter shaft;
3rd pole shoe 7-3 of 20 grades of black boies is arranged on the cylindrical of the 3rd ladder 1-3 of multidiameter shaft;
The rest may be inferred
19 pole shoe 7-19 of 20 grades of black boies is arranged on the cylindrical of the 19 ladder 1-19 of multidiameter shaft;
20 pole shoe 7-20 of 20 grades of black boies is arranged on the cylindrical of the 20 ladder 1-20 of multidiameter shaft.
The space that first pole shoe 7-1, the first permanent magnet 9-1, the second pole shoe 7-2 and the second ladder 1-2 surround is the first Expansion sealing chamber 14-1;
The space that second pole shoe 7-2, the second permanent magnet 9-2, the 3rd pole shoe 7-3 and the 3rd ladder 1-3 surround is the second Expansion sealing chamber 14-2;
The rest may be inferred
The space that 19 pole shoe 7-19, the 19 permanent magnet 9-19, the 20 pole shoe 7-20 and the 20 ladder 1-20 surround is the 19 Expansion sealing chamber 14-19.
Magnetic fluid sealing between first pole shoe 7-1 and the first ladder 1-1 of multidiameter shaft and the first Expansion sealing chamber 14-1 form magnetic liquid and labyrinth first order combination seal;
Magnetic fluid sealing between second pole shoe 7-2 and the second ladder 1-2 of multidiameter shaft and the second Expansion sealing chamber 14-2 form magnetic liquid and the second level, labyrinth combination seal;
Magnetic fluid sealing between 3rd pole shoe 7-3 and the 3rd ladder 1-3 of multidiameter shaft and the 3rd Expansion sealing chamber 14-3 form magnetic liquid and labyrinth third level combination seal;
The rest may be inferred
Magnetic fluid sealing between 19 pole shoe 7-19 and the 19 ladder 1-19 of multidiameter shaft and the 19 Expansion sealing chamber 14-19 form magnetic liquid and the 19 grade, labyrinth combination seal;
Magnetic fluid sealing between 20 pole shoe 7-20 and the 20 ladder 1-20 of multidiameter shaft is the 20 grade of magnetic fluid sealing.
The difference of the diameter of axle of adjacent two ladders is 12mm.The right flank 16 of the first described pole shoe 7-1 and the shaft shoulder left surface 15 of the second ladder are 2.0mm apart from Lg.Described first to the 20 pole shoe 7-1,7-2 ..., the first to the 20 ladder 1-1 of the inner headed face of 7-20 and described multidiameter shaft, 1-2 ..., 1-20 periphery matching gap be 2.0mm.
First to the 19 Expansion sealing chamber 14-1,14-2 ..., 14-19 radial length equal, be 30mm.
20 grades of magnetic liquids and 19 grades of labyrinth alternate type combination seals are realized by assembling above.
Seal ring 3 embeds in the groove on shell 2 flange, is fixed on sealed medium housing with being threaded of sealed medium housing by shell 2.
Claims (8)
1. magnetic liquid and a labyrinth alternate type combination seal, this alternate type combination seal comprises: axle (1), shell (2), the first magnetism resistent ring (6), the second magnetism resistent ring (10), the first pole shoe (7-1), the second pole shoe (7-2), the first permanent magnet (9-1), the first rubber ring (8-1), the second rubber ring (8-2), clutch shaft bearing (5), the second bearing (11), end cap (12), the first jump ring (4), the second jump ring (13);
First rubber ring (8-1), the second rubber ring (8-2) are arranged in the groove on the first pole shoe (7-1), the second pole shoe (7-2) cylindrical respectively;
Between the first magnetism resistent ring (6), the second magnetism resistent ring (10), order installs the first pole shoe (7-1), the first permanent magnet (9-1), the second pole shoe (7-2), by on the first pole shoe described in magnetic liquid injection and the second pole shoe inner headed face, form black box, be enclosed within axle (1);
Again clutch shaft bearing (5), the second bearing (11) are arranged on the axle in the first magnetism resistent ring (6), the second magnetism resistent ring (10) outside respectively, the first jump ring (4), the second jump ring (13) are arranged in the groove (4-1) of axle (1) left end and the groove (4-2) of right-hand member respectively; Again the black box be arranged on axle (1) is arranged in shell (2), by be threaded compression second bearing (11) outer ring of end cap (12) with shell (2);
It is characterized in that:
Described axle (1) is a multidiameter shaft;
Described black box is N level sealing configuration, and this structure comprises: first to N pole shoe (7-1,7-2 ... 7-N), first to N rubber ring (8-1,8-2 ..., 8-N), first to N-1 permanent magnet (9-1,9-2 ..., 9-(N-1));
By the 3rd to N rubber ring (8-3 ..., 8-N) be arranged on respectively the 3rd to N pole shoe (7-3 ..., 7-N) in groove on cylindrical;
After the second pole shoe (7-2), order install the second permanent magnet (9-2), the 3rd pole shoe (7-3) ..., N-1 permanent magnet (9-(N-1)), N pole shoe (7-N), described in being injected by magnetic liquid first on N pole shoe inner headed face, be enclosed within described axle (1), form N level black box, realize N level magnetic fluid sealing;
First pole shoe (7-1) of N level black box is arranged on the cylindrical of the first ladder (1-1) of multidiameter shaft;
Second pole shoe (7-2) of N level black box is arranged on the cylindrical of the second ladder (1-2) of multidiameter shaft;
3rd pole shoe (7-3) of N level black box is arranged on the cylindrical of the 3rd ladder (1-3) of multidiameter shaft;
The rest may be inferred
The N pole shoe (7-N) of N level black box is arranged on the cylindrical of N ladder (1-N) of multidiameter shaft;
The space that first pole shoe (7-1), the first permanent magnet (9-1), the second pole shoe (7-2) and the second ladder (1-2) surround is the first Expansion sealing chamber (14-1);
The space that second pole shoe (7-2), the second permanent magnet (9-2), the 3rd pole shoe (7-3) and the 3rd ladder (1-3) surround is the second Expansion sealing chamber (14-2);
The rest may be inferred
The space that N-1 pole shoe (7-(N-1)), N-1 permanent magnet (9-(N-1)), N pole shoe (7-N) and N ladder (1-N) surround is N-1 Expansion sealing chamber (14-(N-1));
Magnetic fluid sealing between first ladder (1-1) of the first pole shoe (7-1) and multidiameter shaft and the first Expansion sealing chamber (14-1) form magnetic liquid and labyrinth first order combination seal; Magnetic fluid sealing between second ladder (1-2) of the second pole shoe (7-2) and multidiameter shaft and the second Expansion sealing chamber (14-2) form magnetic liquid and the second level, labyrinth combination seal;
The rest may be inferred
Magnetic fluid sealing between N-1 pole shoe (7-(N-1)) and the N-1 ladder (1-(N-1)) of multidiameter shaft and N-1 Expansion sealing chamber (14-(N-1)) form magnetic liquid and labyrinth N-1 level combination seal; N is 2 ~ 20;
Magnetic liquid and labyrinth alternate type combination seal is realized by assembling above.
2. a kind of magnetic liquid according to claim 1 and labyrinth alternate type combination seal, is characterized in that:
First ladder (1-1) axial length of described multidiameter shaft is the distance sum of the axial length of the first magnetism resistent ring (6), the axial length of the first pole shoe (7-1), the right flank (16) of the first pole shoe (7-1) and the shaft shoulder left surface (15) of the second ladder;
Second ladder (1-2) axial length of multidiameter shaft is the axial length of the first permanent magnet (9-1) and the axial length sum of the second pole shoe (7-2);
3rd ladder (1-3) axial length of multidiameter shaft is the axial length of the second permanent magnet (9-2) and the axial length sum of the 3rd pole shoe (7-3);
The rest may be inferred
N ladder (1-N) axial length of multidiameter shaft is the axial length of N-1 permanent magnet (9-(N-1)) and the axial length sum of N pole shoe (7-N);
The difference of the diameter of axle of adjacent two ladders is equal, is 2 ~ 12mm.
3. a kind of magnetic liquid according to claim 2 and labyrinth alternate type combination seal, is characterized in that:
The right flank (16) of described the first pole shoe (7-1) and shaft shoulder left surface (15) the distance Lg of the second ladder are 0.1 ~ 2.0mm.
4. a kind of magnetic liquid according to claim 1 and labyrinth alternate type combination seal, is characterized in that:
Described first to N pole shoe (7-1,7-2 ..., 7-N) inner headed face and described multidiameter shaft first equal to the matching gap of N ladder (1-1,1-2 ... 1-N) periphery, be 0.4 ~ 2.0mm.
5. a kind of magnetic liquid according to claim 1 and labyrinth alternate type combination seal, is characterized in that:
First to N-1 Expansion sealing chamber (14-1,14-2 ..., 14-(N-1)) radial length equal, be 6 ~ 30mm.
6. a kind of magnetic liquid according to claim 1 and labyrinth alternate type combination seal, is characterized in that:
Described first to N pole shoe (7-1,7-2 ..., 7-N) endoporus on process pole tooth, pole number of teeth amount is 2 ~ 10.
7. a kind of magnetic liquid according to claim 1 and labyrinth alternate type combination seal, is characterized in that:
Described first to N pole shoe (7-1,7-2 ..., 7-N) endoporus be taper hole, tapering size is 1:10 ~ 1:0.25.
8. a kind of magnetic liquid according to claim 7 and labyrinth alternate type combination seal, is characterized in that:
Described first to N pole shoe (7-1,7-2 ..., 7-N) taper hole in, process pole tooth, pole number of teeth amount is 2 ~ 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310035109.4A CN103115152B (en) | 2013-01-30 | 2013-01-30 | Magnetic fluid and maze alternated type combined sealing |
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| CN201310035109.4A CN103115152B (en) | 2013-01-30 | 2013-01-30 | Magnetic fluid and maze alternated type combined sealing |
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| CN103115152A CN103115152A (en) | 2013-05-22 |
| CN103115152B true CN103115152B (en) | 2015-05-06 |
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| CN201310035109.4A Expired - Fee Related CN103115152B (en) | 2013-01-30 | 2013-01-30 | Magnetic fluid and maze alternated type combined sealing |
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