CN103410700A - Parabola tooth axial direction labyrinth seal structure - Google Patents
Parabola tooth axial direction labyrinth seal structure Download PDFInfo
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- CN103410700A CN103410700A CN2013102920155A CN201310292015A CN103410700A CN 103410700 A CN103410700 A CN 103410700A CN 2013102920155 A CN2013102920155 A CN 2013102920155A CN 201310292015 A CN201310292015 A CN 201310292015A CN 103410700 A CN103410700 A CN 103410700A
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Abstract
Disclosed is a parabola tooth axial direction labyrinth seal structure. The parabola tooth axial direction labyrinth seal structure is a labyrinth seal tooth shape used for a labyrinth seal structure of a piston, an air cylinder, a piston rod and a cylinder body of a reciprocating type labyrinth compressor, wherein the cavity of the tooth shape is a region formed by a parabola and an axis. The tooth height, the tooth width and the distance width adopted by the piston are 2-4 times those adopted by the air cylinder. Parabola parameters are acquired by analog, calculations and optimization through a two-dimensional parabola CAD curve drawing software package module embedded into CAD application software and FLUENT application software based on a finite volume method. Compared with traditional same-size-parameter triangular tooth, trapezoid tooth and circular tooth labyrinth seal structures, the parabola tooth axial direction labyrinth seal structure is good in sealing effect, and the ability of dissipating energy of seal media in the sealing region is improved by 30%-49%.
Description
Technical field
The present invention relates to mechanical sealing technology, particularly the axial labyrinth seal toothing of a kind of piston for reciprocating labyrinth compressor and cylinder, piston rod and cylinder body parabola.
Background technique
Labyrinth seal is widely used in the dynamic power machines such as reciprocal compressor, blower and steam turbine because of characteristics such as simple in structure, easy to use, reliable operations.Its working principle is to realize sealing by the throttling process in throttle clearance and the kinetic energy dissipation in cavity, the energy dissipation size of two flow process is determining the performance of sealing, and sealing configuration is the main determining factor of energy dissipation, therefore carry out labyrinth seal structure analysis and the novel sealing configuration of research and design, to reducing the labyrinth seal leakage rate, to improve the labyrinth seal performance significant.
Increase along with the demand of the preparation of national clean energy resource and conveying equipment, promote developing rapidly of reciprocating type labyrinth compressor equipment industry, traditional 2K, 2D, 3K, 4D, 4K type labyrinth compressor are because of sealing configuration and process engineering backwardness thereof, and serious restriction develops large-scale or super sized type labyrinth compressor system equipment.The labyrinth seal toothing played a decisive role in the labyrinth compressor labyrinth seal structure of current designed production, be to adopt traditional lance tooth, round tooth and stepped tooth structure substantially, a kind of imitative stepped tooth structure also occurred in recent years.
From point of theory, the key that reduces leakage rate is energy inner fully dissipation in labyrinth of working medium, by tooth-shape structure, determined, in any case the traditional form labyrinth seal profile of tooth adopted at present changes profile of tooth angle, depth of profile and gap width, the variation of matter does not all occur in the working medium energy dissipation degree that it seals, and in engineering reality, increases often by 100% cost and drops into to exchange for 3～12% sealing effect.Although imitative stepped tooth labyrinth seal structure has fundamentally changed working medium energy dissipation effect in the labyrinth seal tooth, than the Labyrinth Seal Efficiency of traditional form, improve more than 60%, but because imitative stepped tooth is the Experience Design structure, without the theoretical moulding foundation of profile of tooth, like this for the labyrinth compressor of any specification, need to be to the piston of the imitative stepped tooth labyrinth seal structure of adopt, cylinder body and piston rod carry out a large amount of labyrinths effect test, so in labyrinth compressor, adopt imitative stepped tooth labyrinth seal structure can increase a large amount of costs, can produce simultaneously a large amount of test waste products., how to reduce costs, the labyrinth seal toothing of improvement and the efficient sealed performance of development of new, be to manufacture and design the labyrinth compressor industry to make great efforts the target of seeking for this reason always.
The technical problem to be solved in the present invention is, a kind of labyrinth seal structure good sealing effect is provided, improves 30%～49% the axial labyrinth seal toothing of parabola in the ability of sealing area dissipation institute sealing medium energy.
The technological scheme adopted is:
The axial labyrinth seal toothing of a kind of parabola, this structure is for the piston of reciprocating type labyrinth compressor and the labyrinth seal of cylinder, piston rod and cylinder body, and the profile of tooth of described labyrinth seal is the parabola profile of tooth.
Labyrinth seal tooth tooth depth, the facewidth and the spacing width adopted on above-mentioned piston is labyrinth seal tooth tooth depth, the facewidth and spacing width on cylinder 2-4 times.
Above-mentioned parabola tooth profile parameter is by being embedded into drafting Two dimensional parabolic stability line CAD Curve Software bag module in the CAD application software, obtaining based on finite volume method FLUENT application software analog computation optimization.
Software kit module, FLUENT analog computation and the finite element optimization of above-mentioned definite labyrinth seal parabola tooth profile parameter are according to the profile of tooth analytic expression, for following lance tooth two-dimensional mathematics analytic expression (1), (2) of reciprocating movement sealing and parabola tooth two-dimensional mathematics analytic expression (3), (4) of extending exploitation, the parabola labyrinth seal toothing be optimized, concrete analytic equation is as follows:
……（3）
……（4）。
The present invention has the labyrinth seal structure good sealing effect, in the ability of sealing area dissipation institute sealing medium energy, improves 30%～49% the axial labyrinth seal toothing of parabola.
The accompanying drawing explanation
Fig. 1 is the lance tooth plotted curve.
Fig. 2 is parabola tooth plotted curve.
Embodiment
The axial labyrinth seal toothing of a kind of parabola, its design method:
1, by C++ application software diabolo labyrinth seal tooth profile parameter, design and develop research, develop parametrization and draw the software module of two-dimentional reciprocating type labyrinth seal structure, enable on the CAD application platform, to pass through given design parameter, automatically draw out two-dimentional labyrinth seal flow field figure (see figure 1).
2,, in conjunction with CAXA and CAD application software, on CAD software application platform, draw the secondary development application of parabola X-Y scheme.
3, by forming the determined parabola tooth parameter analysis and research of labyrinth seal structure, application C++ software, develop parametrization and draw the software module of the reciprocating type labyrinth seal structure of parabola tooth two dimension, enable by given parameters, to set on the CAD application platform, automatically draw out two-dimentional labyrinth seal flow field figure (see figure 2).
4, the application finite element theory is optimized the parameter of parabola labyrinth seal profile of tooth, then by FLUENT, simulates the internal flow of labyrinth seal, the parabola labyrinth seal toothing be optimized.
The specific design step:
1, according to analytic geometry relationship and two-dimentional lance tooth labyrinth seal CAD plan, derivation lance tooth labyrinth seal two-dimensional flow field CAD plan is resolved relation, as follows:
By analytic expression (1), (2) and C++ software application, develop parametrization and draw the software module of two-dimentional reciprocating type labyrinth seal structure, enable on the CAD application platform, to pass through given design parameter, automatically draw out two-dimentional labyrinth seal flow field figure (see figure 1)
In following formula: X, Y are linear equation independent variable and the functions that on piston, two dimension forms the triangle profile of tooth, K is the variable at triangle profile of tooth angle, M is triangle profile of tooth tooth depth variable, and P is the gap width variable of triangle profile of tooth under tooth depth M condition, and i is (0,1,2 ...);
X, y are linear equation independent variable and the functions that on cylinder, two dimension forms the triangle profile of tooth, k is the variable at triangle profile of tooth angle, m is triangle profile of tooth tooth depth variable, p is the gap width variable of triangle profile of tooth under tooth depth m condition, δ is piston and cylinder block tooth gaps, and j is (0,1,2 ...).
2, on Two-dimensional Engineering drawing application software CAXA, apply by secondary development, designed and developed drafting Two dimensional parabolic stability line CAD Curve Software bag, and it is imported in the CAD application software as software module, apply this software module, can by parameter fast, accurate Drawing Two dimensional parabolic stability line curve.
3, according to analytic geometry relationship and Two dimensional parabolic stability line tooth labyrinth seal CAD plan, research derivation parabola tooth labyrinth seal two-dimensional flow field CAD plan is resolved relation, as follows:
……（4）
By analytic expression (3), (4) and C++ software application, develop parametrization and draw the software module of two-dimentional reciprocating type labyrinth seal structure, enable on the CAD application platform, to pass through given design parameter, automatically draw out two-dimentional labyrinth seal flow field figure (see figure 2)
In following formula: X, Y are independent variable and the functions of Two dimensional parabolic stability line equation on piston, and N is the variable of determining the parabola opening, and M is parabola profile of tooth tooth depth variable, and P is the gap width variable of parabola profile of tooth under tooth depth M condition, and i is (0,1,2 ...);
X, y are independent variable and the functions of Two dimensional parabolic stability line equation on cylinder body, n is the variable of determining the parabola opening, and m is parabola profile of tooth tooth depth variable, and p is the gap width variable of parabola profile of tooth under tooth depth m condition, δ is piston and cylinder block tooth gaps, and j is (0,1,2 ...).
4, adopt GAMBIT software to set up the two-dimentional unstructured grid model of labyrinth channel, utilize the internal flow of FLUENT simulation labyrinth seal and application finite element theory to different parabola tooth depth M(m), gap width P(p), opening size N(n) and the gap delta parameter be optimized analytical calculation, the parabola labyrinth seal toothing be optimized.
Claims (4)
1. axial labyrinth seal toothing of parabola, this structure is for the piston of reciprocating type labyrinth compressor and the labyrinth seal of cylinder, piston rod and cylinder body, and the profile of tooth that it is characterized in that described labyrinth seal is the parabola profile of tooth.
2. the axial labyrinth seal toothing of a kind of parabola according to claim 1, is characterized in that the labyrinth seal tooth adopted on described piston tooth depth, the facewidth and spacing width are labyrinth seal tooth tooth depth, the facewidth and spacing width on cylinder 2-4 times.
3. the axial labyrinth seal toothing of a kind of parabola according to claim 1, is characterized in that described parabola tooth profile parameter is by being embedded into drafting Two dimensional parabolic stability line CAD Curve Software bag module in the CAD application software, obtaining based on finite volume method FLUENT application software analog computation optimization.
4. the axial labyrinth seal toothing of a kind of parabola according to claim 1, it is characterized in that software kit module, FLUENT analog computation and the finite element optimization of described definite labyrinth seal parabola tooth profile parameter are according to the profile of tooth analytic expression, for following lance tooth two-dimensional mathematics analytic expression (1), (2) of reciprocating movement sealing and parabola tooth two-dimensional mathematics analytic expression (3), (4) of extending exploitation, the parabola labyrinth seal toothing be optimized, concrete analytic equation is as follows:
……（3）
……（4）。
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| CN201310292015.5A CN103410700B (en) | 2013-07-12 | 2013-07-12 | A kind of axial labyrinth seal toothing of parabola |
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| CN103410700B CN103410700B (en) | 2016-07-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654354A (en) * | 2017-09-18 | 2018-02-02 | 沈阳理工大学 | A kind of cycloid axial direction labyrinth seal toothing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002022033A (en) * | 2000-07-05 | 2002-01-23 | Hitachi Ltd | Labyrinth seal and fluid machinery |
| CN201013558Y (en) * | 2006-11-24 | 2008-01-30 | 天华化工机械及自动化研究设计院 | Air cylinder labyrinth sealing of labyrinth compressor for industry |
| CN101303081A (en) * | 2008-06-11 | 2008-11-12 | 合肥工业大学 | Piston seal ring |
| CN102135019A (en) * | 2010-01-22 | 2011-07-27 | 通用电气公司 | Method and apparatus for labyrinth seal packing rings |
| CN102345585A (en) * | 2011-10-10 | 2012-02-08 | 沈阳理工大学 | Reciprocating compressor labyrinth seal structure |
-
2013
- 2013-07-12 CN CN201310292015.5A patent/CN103410700B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002022033A (en) * | 2000-07-05 | 2002-01-23 | Hitachi Ltd | Labyrinth seal and fluid machinery |
| CN201013558Y (en) * | 2006-11-24 | 2008-01-30 | 天华化工机械及自动化研究设计院 | Air cylinder labyrinth sealing of labyrinth compressor for industry |
| CN101303081A (en) * | 2008-06-11 | 2008-11-12 | 合肥工业大学 | Piston seal ring |
| CN102135019A (en) * | 2010-01-22 | 2011-07-27 | 通用电气公司 | Method and apparatus for labyrinth seal packing rings |
| CN102345585A (en) * | 2011-10-10 | 2012-02-08 | 沈阳理工大学 | Reciprocating compressor labyrinth seal structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654354A (en) * | 2017-09-18 | 2018-02-02 | 沈阳理工大学 | A kind of cycloid axial direction labyrinth seal toothing |
| CN107654354B (en) * | 2017-09-18 | 2019-04-09 | 沈阳理工大学 | A kind of cycloid axial direction labyrinth seal toothing |
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| CN103410700B (en) | 2016-07-06 |
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Effective date of registration: 20191106 Address after: 110000 Canghai Road, Shenyang Economic and Technological Development Zone, Shenyang City, Liaoning Province Patentee after: Shenyang Yuanda Compressor Co., Ltd. Address before: 110159 Liaoning Province, Shenyang Hunnan New District Nanping Road No. 6 Patentee before: Shenyang Univ. of Science and Engineering |
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