CN103410700B - A kind of axial labyrinth seal toothing of parabola - Google Patents
A kind of axial labyrinth seal toothing of parabola Download PDFInfo
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- CN103410700B CN103410700B CN201310292015.5A CN201310292015A CN103410700B CN 103410700 B CN103410700 B CN 103410700B CN 201310292015 A CN201310292015 A CN 201310292015A CN 103410700 B CN103410700 B CN 103410700B
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Abstract
A kind of axial labyrinth seal toothing of parabola, is the labyrinth seal profile of tooth adopted with cylinder, piston rod and cylinder body labyrinth seal structure for reciprocating labyrinth compressor piston, and the chamber portion of this profile of tooth is parabola and the region formed of paralleling to the axis.The labyrinth seal tooth tooth depth that adopts on piston, the facewidth and spacing width are on cylinder 2～4 times of labyrinth seal tooth tooth depth, the facewidth and spacing width, and parabola tooth profile parameter is by being embedded into drawing Two dimensional parabolic stability line CAD Curve Software bag module, simulate calculation optimization based on finite volume method FLUENT application software and obtain in CAD application software.With traditional, compare with the lance tooth of dimensional parameters, stepped tooth and round tooth labyrinth seal structure, the labyrinth seal structure good sealing effect of parabola profile of tooth, improve 30%～49% in the ability of sealing area dissipation institute sealing medium energy.
Description
Technical field
The present invention relates to mechanical sealing technology, particularly to a kind of piston for reciprocating labyrinth compressor and cylinder, piston rod and the axial labyrinth seal toothing of cylinder body parabola.
Background technology
Labyrinth seal is widely used in the dynamic power machines such as reciprocating compressor, aerator and steam turbine because of characteristics such as simple in construction, easy to use, reliable operations.Its operation 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 decides the performance of sealing, and seal the main determining factor that structure is energy dissipation, therefore carrying out labyrinth seal structure analysis and the novel sealing structure of research design, to reducing labyrinth seal leakage rate, to improve labyrinth seal performance significant.
Increase along with country's clean energy resource preparation and the demand of conveying equipment, promote developing rapidly of reciprocating labyrinth compressor equipment industry, traditional 2K, 2D, 3K, 4D, 4K type labyrinth compressor falls behind because sealing structure and Technology thereof, and serious restriction develops large-scale or ultra-large type labyrinth compressor system equipment.The labyrinth seal toothing played a decisive role in the designed labyrinth compressor labyrinth seal structure produced at present, is substantially the traditional lance tooth of employing, round tooth and stepped tooth structure, also occurs in that a kind of imitative stepped tooth structure in recent years.
From point of theory, reduce the energy that it is critical only that working media internal fully dissipation in labyrinth of leakage rate, determined by tooth-shape structure, 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 working media energy dissipation degree that it seals is all without the change that matter occurs, and the cost increasing by 100% in engineering reality often puts into the sealing effectiveness exchanging 3～12% for.Although imitative stepped tooth labyrinth seal structure fundamentally changes working media energy dissipation effect in labyrinth seal tooth, more than 60% is improved than the Labyrinth Seal Efficiency of traditional form, but owing to imitative stepped tooth is Experience Design structure, the foundation of molding without theory of tooth form, so for the labyrinth compressor of any specification, need the piston being adopted imitative stepped tooth labyrinth seal structure, cylinder body and piston rod carry out a large amount of labyrinth effect test, so adopting imitative stepped tooth labyrinth seal structure can increase substantial amounts of cost in labyrinth compressor, substantial amounts of test waste product can be produced simultaneously.For this, how to reduce the labyrinth seal toothing of the efficient sealed performance of cost, improvement and development of new, be manufacture and design the target that labyrinth compressor industry makes great efforts to seek always.
The technical problem to be solved in the present invention be to provide a kind of labyrinth seal structure good sealing effect, sealing area dissipation institute sealing medium energy ability improve 30%～49% the axial labyrinth seal toothing of parabola.
The technical scheme is that
A kind of axial labyrinth seal toothing of parabola, this structure is used for the piston of reciprocating labyrinth compressor and the labyrinth seal of cylinder, piston rod and cylinder body, and the profile of tooth of described labyrinth seal is parabola profile of tooth.
The labyrinth seal tooth tooth depth that adopts on above-mentioned piston, the facewidth and spacing width are on cylinder 2-4 times of labyrinth seal tooth tooth depth, the facewidth and spacing width.
Above-mentioned parabola tooth profile parameter is the drafting Two dimensional parabolic stability line CAD Curve Software bag module by being embedded in CAD application software, simulates calculation optimization acquisition based on finite volume method FLUENT application software.
Above-mentioned the software kit module of determination labyrinth seal parabola tooth profile parameter, FLUENT simulation calculate and finite element optimization foundation profile of tooth analytic expression, for following lance tooth two-dimensional mathematics analytic expression (1) of reciprocating movement sealing, (2) and parabola tooth two-dimensional mathematics analytic expression (3) of extension exploitation, (4), obtaining the parabola labyrinth seal toothing optimized, concrete analytic equation is as follows:
... (1)
... (2)
... (3)
... (4).
The present invention have labyrinth seal structure good sealing effect, sealing area dissipation institute sealing medium energy ability improve 30%～49% the axial labyrinth seal toothing of parabola.
Accompanying drawing explanation
Fig. 1 is lance tooth curve chart.
Fig. 2 is parabola tooth curve chart.
Detailed description of the invention
A kind of axial labyrinth seal toothing of parabola, its method for designing:
1, research is designed and developed by C++ application software diabolo labyrinth seal tooth profile parameter, develop the software module of the parametric drafting reciprocating labyrinth seal structure of two dimension, enable in CAD application platform by given design parameter, automatically draw out two dimension labyrinth seal flow field figure (see figure 1).
2, in conjunction with CAXA and CAD application software, CAD software application platform is drawn 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 the software module of the parametric drafting parabola tooth reciprocating labyrinth seal structure of two dimension, enable to be set by given parameters in CAD application platform, automatically draw out two dimension labyrinth seal flow field figure (see figure 2).
4, the parameter of parabola labyrinth seal profile of tooth is optimized by application finite element theory, then passes through FLUENT and simulates the internal flow of labyrinth seal, obtains the parabola labyrinth seal toothing optimized.
Specific design step:
1, according to analytical geometry relationship and two dimension lance tooth labyrinth seal CAD design figure, derivation lance tooth labyrinth seal two-dimensional flow field CAD design figure analytical relation, as follows:
... (1)
... (2)
By analytic expression (1), (2) and C++ software application, develop the software module of the parametric drafting reciprocating labyrinth seal structure of two dimension, enable in CAD application platform by given design parameter, automatically draw out two dimension labyrinth seal flow field figure (see figure 1)
In above formula: X, Y are linear equation independent variable and the functions of two dimension composition triangle profile of tooth on piston, K is the variable of triangle profile angle, M is triangle profile of tooth tooth depth variable, the gap width variable of triangle profile of tooth when P is tooth depth M, and i is (0,1,2 ...)；
X, y are linear equation independent variable and the functions of two dimension composition triangle profile of tooth on cylinder, k is the variable of triangle profile angle, m is triangle profile of tooth tooth depth variable, the gap width variable of triangle profile of tooth when p is tooth depth m, δ is piston and cylinder block tooth gaps, and j is (0,1,2 ...).
2, applied by secondary development on Two-dimensional Engineering drawing application software CAXA, design and develop drafting Two dimensional parabolic stability line CAD Curve Software bag, and be conducted in CAD application software as software module, apply this software module, can, accurate Drawing Two dimensional parabolic stability line curve quick by parameter.
3, according to analytical geometry relationship and Two dimensional parabolic stability line tooth labyrinth seal CAD design figure, derivation parabola tooth labyrinth seal two-dimensional flow field CAD design figure analytical relation is studied, as follows:
... (3)
... (4)
By analytic expression (3), (4) and C++ software application, develop the software module of the parametric drafting reciprocating labyrinth seal structure of two dimension, enable in CAD application platform by given design parameter, automatically draw out two dimension labyrinth seal flow field figure (see figure 2)
In above formula: X, Y are independent variable and the functions of Two dimensional parabolic stability line equation on piston, and N determines that the variable of parabola opening, M is parabola profile of tooth tooth depth variable, the gap width variable of parabola profile of tooth when P is tooth depth M, 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 determines that the variable of parabola opening, and m is parabola profile of tooth tooth depth variable, the gap width variable of parabola profile of tooth when p is tooth depth m, δ is piston and cylinder block tooth gaps, and j is (0,1,2 ...).
4, GAMBIT software is adopted to set up the two-dimentional unstructured grid model of labyrinth channel, utilize FLUENT to simulate the internal flow of labyrinth seal and application finite element theory to different parabola tooth depth M(m), gap width P(p), opening size N(n) and gap delta parameter be optimized analytical calculation, obtain the parabola labyrinth seal toothing optimized.
Claims (1)
1. the axial labyrinth seal toothing of parabola, this structure is used for the piston of reciprocating labyrinth compressor and the labyrinth seal of cylinder, piston rod and cylinder body, it is characterised in that: the profile of tooth of described labyrinth seal is parabola profile of tooth；The labyrinth seal tooth tooth depth that adopts on described piston, the facewidth and spacing width are on cylinder 2～4 times of labyrinth seal tooth tooth depth, the facewidth and spacing width；The parameter of described parabola profile of tooth is the drafting Two dimensional parabolic stability line CAD Curve Software bag module by being embedded in CAD application software, simulates calculation optimization acquisition based on finite volume method FLUENT application software.
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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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| CN201310292015.5A CN103410700B (en) | 2013-07-12 | 2013-07-12 | A kind of axial labyrinth seal toothing of parabola |
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| CN103410700A CN103410700A (en) | 2013-11-27 |
| CN103410700B true CN103410700B (en) | 2016-07-06 |
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| CN107654354B (en) * | 2017-09-18 | 2019-04-09 | 沈阳理工大学 | A kind of cycloid axial direction labyrinth seal toothing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002022033A (en) * | 2000-07-05 | 2002-01-23 | Hitachi Ltd | Labyrinth seal and fluid machinery |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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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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