CN103115152A - Magnetic fluid and maze alternated type combined sealing - Google Patents
Magnetic fluid and maze alternated type combined sealing Download PDFInfo
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- CN103115152A CN103115152A CN2013100351094A CN201310035109A CN103115152A CN 103115152 A CN103115152 A CN 103115152A CN 2013100351094 A CN2013100351094 A CN 2013100351094A CN 201310035109 A CN201310035109 A CN 201310035109A CN 103115152 A CN103115152 A CN 103115152A
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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 that rotates causes rotating shaft usually to be not less than the 0.4mm circular runout, and the inefficacy that the too small meeting of seal clearance causes the wearing and tearing of rotating shaft and shell and causes sealing, 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, the gap is larger, and the voltage endurance capability of magnetic fluid sealing is less, therefore, improves large gap condition magnetic hydraulic seal performance and has great importance.
Summary of the invention
Technical problem to be solved by this invention is exactly to provide a kind of magnetic liquid and labyrinth alternate type combination seal, for the leakage problem that solves large 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.
Be arranged on respectively in the first groove to the N pole shoe cylindrical to the N rubber ring first.
Between first, second magnetism resistent ring, order install 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;
Magnetic liquid is injected described first to N pole shoe inner headed face, consist of N level black box, be enclosed within on axle;
Again first, second bearing is arranged on respectively on the axle in first, second magnetism resistent ring outside, first, second jump ring is arranged on respectively in the groove of the groove of left end on axle and right-hand member; The N level black box that will be arranged on again on axle is installed in the enclosure, compresses the second bearing outer ring by end cap with being threaded of shell;
The first pole shoe of N level black box is arranged on the cylindrical of the first ladder of multidiameter shaft;
The second pole shoe of N level black box is arranged on the cylindrical of the second ladder of multidiameter shaft;
The 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 the 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 the 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 the first ladder of the first pole shoe and multidiameter shaft and the first Expansion sealing chamber formation magnetic liquid and labyrinth first order combination seal; Magnetic fluid sealing between the second ladder of the second pole shoe and multidiameter shaft and the second Expansion sealing chamber formation magnetic liquid and the second level, labyrinth combination seal;
The rest may be inferred
Magnetic fluid sealing between the N-1 ladder of N-1 pole shoe and multidiameter shaft and N-1 Expansion sealing chamber formation magnetic liquid and labyrinth N-1 level combination seal;
N is 2～20.
Realize magnetic liquid and labyrinth alternate type combination seal by above assembling.
Beneficial effect of the present invention:
By the axle in magnetic fluid sealing is designed to multidiameter shaft, shape between pole shoe and pole shoe internal diameter is designed to stepped, and with 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, realizes magnetic liquid and labyrinth alternate type combination seal.The present invention has overcome the shortcoming that labyrinth seal can't realize zero leakage, has reduced the loss of magnetic liquid when seal failure, has improved the voltage endurance capability of large gap condition magnetic hydraulic seal, has enlarged its range of safety operation.Therefore, it is a kind of desirable seal method be used to solving large gap condition Shaft leakage problem.This magnetic liquid and labyrinth alternate type combined sealing structure are compact, are easy to install.
Description of drawings
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 utmost point 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 grades of magnetic liquids and the labyrinth alternate type combination seal schematic diagram of utmost point tooth on the 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 the 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 the 2cr13 stainless steel.
Described first to N-1 permanent magnet 9-1,9-2 ..., 9-(N-1) material be NdFeB material.
With first to N rubber ring 8-1,8-2 ..., 8-N be arranged on respectively first to N pole shoe 7-1,7-2 ..., in the groove on the 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;
Magnetic liquid is injected described first to N pole shoe inner headed face, consist of N level black box, be enclosed within on 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 by sealed medium with and pressure size determine, but this is not emphasis of the present invention.
Again first, second bearing 5,11 is arranged on respectively on the axle in first, second magnetism resistent ring 6,10 outsides, first, second jump ring 4,13 is arranged on respectively in the groove 4-2 of the groove 4-1 of axle 1 left end and right-hand member; The N level black box that will be arranged on again on axle 1 is arranged in shell 2, compresses the second bearing 11 outer rings by being threaded of end cap 12 and shell 2;
The first pole shoe 7-1 of N level black box is arranged on the cylindrical of the first ladder 1-1 of multidiameter shaft;
The second pole shoe 7-2 of N level black box is arranged on the cylindrical of the second ladder 1-2 of multidiameter shaft;
The 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 the 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 the 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 the 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 the 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
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;
Realize magnetic liquid and labyrinth alternate type combination seal by above assembling.
The first ladder 1-1 axial length of described multidiameter shaft is that the shaft shoulder left surface 15 of the right flank 16 of axial length, the first pole shoe 7-1 of axial length, the first pole shoe 7-1 of the first magnetism resistent ring 6 and the second ladder is apart from sum;
The second ladder 1-2 axial length of multidiameter shaft is the axial length sum of axial length and the second pole shoe 7-2 of the first permanent magnet 9-1;
The 3rd ladder 1-3 axial length of multidiameter shaft is the axial length sum of axial length and the 3rd pole shoe 7-3 of the second permanent magnet 9-2;
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 described the first pole shoe 7-1 and the shaft shoulder left surface of the second ladder 15 distance L g are 0.1～2.0mm.
Described first to N pole shoe 7-1,7-2 ..., the inner headed face of 7-N and described multidiameter shaft first to N ladder 1-1,1-2 ... the matching gap of 1-N periphery is 0.4～2.0mm.
Described first to N-1 permanent magnet 9-1,9-2 ... the external diameter of 9-(N-1) all equates;
First to N-1 Expansion sealing chamber 14-1,14-2 ..., 14-(N-1) radial length equate, be 6～30mm.
Described first to N pole shoe 7-1,7-2 ..., 7-N endoporus on process utmost point tooth, utmost point 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 that tapering is 1:10～1:0.25.
Described first to N pole shoe 7-1,7-2 ..., 7-N taper hole in, process utmost point tooth, utmost point number of teeth amount is 2～10.
The right flank 16 of the axial length that described the first ladder 1-1 axial length is the first magnetism resistent ring 6, the axial length of the first pole shoe 7-1, the first pole shoe 7-1 and the shaft shoulder left surface 15 of the second ladder are apart from sum;
The second ladder 1-2 axial length is the axial length sum of axial length and the second pole shoe 7-2 of the first permanent magnet 9-1;
The 3rd ladder 1-3 axial length is the axial length sum of axial length and the 3rd pole shoe 7-3 of the second permanent magnet 9-2;
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 described the first pole shoe 7-1 and the shaft shoulder left surface of the second ladder 15 distance L g are 0.1～2.0mm.
Described first to N pole shoe 7-1,7-2 ..., the inner headed face of 7-N and described multidiameter shaft first to N ladder 1-1,1-2 ... the matching gap of 1-N periphery is 0.4～2.0mm.
Described first to N-1 permanent magnet 9-1,9-2 ... the external diameter of 9-(N-1) all equates;
First to N-1 Expansion sealing chamber 14-1,14-2 ..., 14-(N-1) radial length equate, 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 utmost point tooth, utmost point 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 utmost point tooth, utmost point 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, the 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 groove on first, second pole shoe 7-1,7-2 cylindrical.
Between first, second magnetism resistent ring 6,10, order is installed the first pole shoe 7-1, the first permanent magnet 9-1, the second pole shoe 7-2.
Magnetic liquid is injected on described first, second pole shoe inner headed face, consist of the secondary seal assembly, be enclosed within on 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 4-2 of the groove 4-1 of axle 1 left end and right-hand member; The black box that will be arranged on again on axle 1 is arranged in shell 2, compresses the second bearing 11 outer rings by being threaded of end cap 12 and shell 2.
The first pole shoe 7-1 of secondary seal assembly is arranged on the cylindrical of the first ladder 1-1 of multidiameter shaft;
The 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 the 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 the 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.
The difference of the diameter of axle of adjacent two ladders is 2mm.The right flank 16 of described the first pole shoe 7-1 and the shaft shoulder left surface of the second ladder 15 distance L g are 0.1mm.The inner headed face of described first, second pole shoe 7-1,7-2 and first, second ladder 1-1 of described multidiameter shaft, the matching gap of 1-2 periphery are 0.4mm.
The radial length of the first Expansion sealing chamber 14-1 equates, is 6mm.
Realize magnetic liquid and labyrinth alternate type combination seal by above assembling.
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 6,10, the first to the 3rd pole shoe 7-1,7-2,7-3, the 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.
The first to the 3rd rubber ring 8-1,8-2,8-3 are arranged on respectively in groove on the first to the 3rd pole shoe 7-1,7-2,7-3 cylindrical.
Between first, second magnetism resistent ring 6,10, order is installed 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.
Magnetic liquid is injected on described the first to the 3rd pole shoe inner headed face, consist of three grades of black boies, be enclosed within on 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 4-2 of the groove 4-1 of left end on axle 1 and right-hand member; The black box that will be arranged on again on axle 1 is arranged in shell 2, compresses the second bearing 11 outer rings by being threaded of end cap 12 and shell 2.
The 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;
The 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;
The 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 the 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 the 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 the 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 the 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 difference of the diameter of axle of adjacent two ladders is 4mm.The right flank 16 of described the first pole shoe 7-1 and the shaft shoulder left surface of the second ladder 15 distance L g are 1mm.The inner headed face of described the first to the 3rd pole shoe 7-1,7-2,7-3 and the first to the 3rd ladder 1-1, the 1-2 of described multidiameter shaft, the matching gap of 1-3 periphery are 0.6mm.
The radial length of first, second Expansion sealing chamber 14-1,14-2 equates, is 8mm.
Realize three grades of magnetic liquids and secondary maze alternate type combination seal by above assembling.
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, the 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 are arranged on respectively in 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 is installed 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.
Magnetic liquid is injected on described first to fourth pole shoe inner headed face, consist of the level Four black box, be enclosed within on 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 4-2 of the groove 4-1 of left end on axle 1 and right-hand member; The black box that will be arranged on again on axle 1 is arranged in shell 2, compresses the second bearing 11 outer rings by being threaded of end cap 12 and shell 2.
The first pole shoe 7-1 of level Four black box is arranged on the cylindrical of the first ladder 1-1 of multidiameter shaft;
The second pole shoe 7-2 of level Four black box is arranged on the cylindrical of the second ladder 1-2 of multidiameter shaft;
The 3rd pole shoe 7-3 of level Four black box is arranged on the cylindrical of the 3rd ladder 1-3 of multidiameter shaft;
The 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 the 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 the 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 the 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 the 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 the 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;
Magnetic fluid sealing between the 3rd ladder 1-3 of the 3rd pole shoe 7-3 and 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 described the first pole shoe 7-1 and the shaft shoulder left surface of the second ladder 15 distance L g are 1.2mm.The matching gap of the inner headed face of described first to fourth pole shoe 7-1,7-2,7-3,7-4 and first to fourth ladder 1-1 of described multidiameter shaft, 1-2,1-3,1-4 periphery is 0.8mm.
The radial length of the first to the 3rd Expansion sealing chamber 14-1,14-2,14-3 equates, is 15mm.
Realize level Four magnetic liquid and labyrinth alternate type combination seal by above assembling.
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: process utmost point tooth on the endoporus of described the first to the 3rd pole shoe 7-1,7-2,7-3, utmost point 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 the 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 the first to the 3rd pole shoe 7-1,7-2,7-3, process utmost point tooth, utmost point number of teeth amount is 2～10, and utmost point 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 6,10, the 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, the 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.
With 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 the groove on 7-9,7-10 cylindrical.
Between first, second magnetism resistent ring 6,10, order is installed 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
The 9th pole shoe 7-9, the 9th permanent magnet 9-9, the tenth pole shoe 7-10.
Magnetic liquid is injected on described the first to the tenth pole shoe inner headed face, consist of ten grades of black boies, be enclosed within on 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 4-2 of the groove 4-1 of left end on axle 1 and right-hand member; The black box that will be arranged on again on axle 1 is arranged in shell 2, compresses the second bearing 11 outer rings by being threaded of end cap 12 and shell 2.
The 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;
The 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;
The 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
The 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;
The 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 the 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 the 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 the 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 the 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 the 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;
Magnetic fluid sealing between the 3rd ladder 1-3 of the 3rd pole shoe 7-3 and 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 the 9th ladder 1-9 of the 9th pole shoe 7-9 and multidiameter shaft and the 9th Expansion sealing chamber 14-9 form magnetic liquid and the 9th grade, labyrinth combination seal;
Magnetic fluid sealing between the tenth ladder 1-10 of the tenth pole shoe 7-10 and 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 described the first pole shoe 7-1 and the shaft shoulder left surface of the second ladder 15 distance L g are 1.5mm.Described the first to the tenth pole shoe 7-1,7-2 ..., the inner headed face of 7-10 and described multidiameter shaft the first to the tenth ladder 1-1,1-2 ..., the matching gap of 1-10 periphery is 1.2mm.
The first to the 9th Expansion sealing chamber 14-1,14-2 ..., 14-9 radial length equate, be 20mm.
Realize ten grades of magnetic liquids and nine grades of labyrinth alternate type combination seals by above assembling.
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, the 10, the 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, the 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.
With 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 the groove on 7-19,7-20 cylindrical.
Between first, second magnetism resistent ring 6,10, order is installed 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
The 19 pole shoe 7-19, the 19 permanent magnet 9-19, the 20 pole shoe 7-20.
Magnetic liquid is injected on described the first to the 20 pole shoe inner headed face, consist of 20 grades of black boies, be enclosed within on 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 4-2 of the groove 4-1 of left end on axle 1 and right-hand member; The black box that will be arranged on again on axle 1 is arranged in shell 2, compresses the second bearing 11 outer rings by being threaded of end cap 12 and shell 2.
The 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;
The 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;
The 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
The 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;
The 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 the 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 the 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 the 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 the 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 the 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;
Magnetic fluid sealing between the 3rd ladder 1-3 of the 3rd pole shoe 7-3 and 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 the 19 ladder 1-19 of the 19 pole shoe 7-19 and multidiameter shaft and the 19 Expansion sealing chamber 14-19 form magnetic liquid and the 19 grade, labyrinth combination seal;
Magnetic fluid sealing between the 20 ladder 1-20 of the 20 pole shoe 7-20 and 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 described the first pole shoe 7-1 and the shaft shoulder left surface of the second ladder 15 distance L g are 2.0mm.Described the first to the 20 pole shoe 7-1,7-2 ..., the inner headed face of 7-20 and described multidiameter shaft the first to the 20 ladder 1-1,1-2 ..., the matching gap of 1-20 periphery is 2.0mm.
The first to the 19 Expansion sealing chamber 14-1,14-2 ..., 14-19 radial length equate, be 30mm.
Realize 20 grades of magnetic liquids and 19 grades of labyrinth alternate type combination seals by above assembling.
In the groove that seal ring 3 embeds on shell 2 flanges, be fixed on the sealed medium housing with being threaded of sealed medium housing by shell 2.
Claims (8)
1. a magnetic liquid and labyrinth alternate type combination seal, this alternate type combination seal comprises:
Axle (1), shell (2), first, second magnetism resistent ring (6,10), first and second pole shoe (7-1,7-2), the first permanent magnet (9-1), first, second rubber ring (8-1,8-2), first and second bearing (5,11), end cap (12), first, second jump ring (4,13);
First, second rubber ring (8-1,8-2) is arranged on respectively in groove on pole shoe (7-1,7-2) cylindrical;
Between first, second magnetism resistent ring (6,10), order is installed the first pole shoe (7-1), the first permanent magnet (9-1), the second pole shoe (7-2), magnetic liquid is injected on described first, second pole shoe inner headed face, consist of black box, be enclosed within on axle (1);
Again first, second bearing (5,11) is arranged on respectively on the axle in first, second magnetism resistent ring (6,10) outside, first, second jump ring (4,13) is arranged on respectively in the groove (4-2) of the groove (4-1) of axle (1) left end and right-hand member; The black box that will be arranged on again on axle (1) is arranged in shell (2), compresses the second bearing (11) outer ring by being threaded of end cap (12) and 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 the N pole shoe (7-1,7-2 ... 7-N), first to the N rubber ring (8-1,8-2 ..., 8-N), first to the N-1 permanent magnet (9-1,9-2 ..., 9-(N-1));
With the 3rd to the N rubber ring (8-3 ..., 8-N) be arranged on respectively in the 3rd groove to N pole shoe (7-3, the 7-N) 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), magnetic liquid is injected described first to N pole shoe inner headed face, be enclosed within on described axle (1), consist of 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;
The 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 the 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 the 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 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
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;
Realize magnetic liquid and labyrinth alternate type combination seal by above assembling.
2. a kind of magnetic liquid according to claim 1 and labyrinth alternate type combination seal is characterized in that:
The first ladder (1-1) axial length of described multidiameter shaft be axial length, first pole shoe (7-1) of the first magnetism resistent ring (6) axial length, the first pole shoe (7-1) right flank (16) and the second ladder shaft shoulder left surface (15) apart from sum;
The second ladder (1-2) axial length of multidiameter shaft is the axial length sum of axial length and second pole shoe (7-2) of the first permanent magnet (9-1);
The 3rd ladder (1-3) axial length of multidiameter shaft is the axial length sum of axial length and the 3rd pole shoe (7-3) of the second permanent magnet (9-2);
The rest may be inferred
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.
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) is 0.1～2.0mm with shaft shoulder left surface (15) the distance L g of the second ladder.
4. a kind of magnetic liquid according to claim 1 and labyrinth alternate type combination seal is characterized in that:
Described first to the N pole shoe (7-1,7-2 ..., 7-N) inner headed face and described multidiameter shaft first to the N ladder (1-1,1-2 ... 1-N) matching gap of periphery is 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 equate, 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 the N pole shoe (7-1,7-2 ..., 7-N) endoporus on process utmost point tooth, utmost point 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 the N pole shoe (7-1,7-2 ..., 7-N) endoporus be taper hole, the 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 the N pole shoe (7-1,7-2 ..., 7-N) taper hole in, process utmost point tooth, utmost point number of teeth amount is 2～10.
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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 true CN103115152A (en) | 2013-05-22 |
| CN103115152B 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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| CN105370892A (en) * | 2015-12-11 | 2016-03-02 | 南京工程学院 | Magneto-rheological torque controller |
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| CN110131419B (en) * | 2019-05-30 | 2024-05-31 | 自贡兆强密封制品实业有限公司 | Reciprocating type magnetic liquid combined sealing device |
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