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Numéro de publicationCN200985803 Y
Type de publicationOctroi
Numéro de demandeCN 200620049621
Date de publication5 déc. 2007
Date de dépôt27 déc. 2006
Date de priorité27 déc. 2006
Numéro de publication200620049621.X, CN 200620049621, CN 200985803 Y, CN 200985803Y, CN-Y-200985803, CN200620049621, CN200620049621.X, CN200985803 Y, CN200985803Y
Inventeurs张红梅, 顾玫玫
Déposant上海汽轮机有限公司
Exporter la citationBiBTeX, EndNote, RefMan
Liens externes:  SIPO, Espacenet
Active blade integral enclosing belt radial packing teeth used for steam turbine high pressure through flow
CN 200985803 Y
Résumé
The utility model relates to a steam turbine high pressure through flow radial direction vapor lock structure, which is a movable vane whole shroud radial direction vapor lock tooth and is characterized in that the top of the movable vane shroud is provided with a vapor lock tooth forms a comb teeth maze type vapor lock with the vapor lock tooth of the vapor lock ring embedded in the inner cylinder. Compared with the original flat tooth vapor lock structure, the utility model has larger coefficient of resistance; while compared with the original step type high and low tooth vapor lock, the utility model can add more teeth, thereby reducing the leaking loss caused by the high pressure through flow vapor lock, enhancing sealing effect and improving the through flow efficiency.
Revendications(1)  Langue du texte original : Chinois
1.一种用于汽轮机高压通流的动叶整体围带径向汽封齿,其特征是:动叶围带顶部上加工有汽封齿,所述汽封齿与镶嵌于内缸的汽封环上的汽封齿构成梳齿迷宫式汽封。 1. A method for the high-pressure turbine rotor blades through the overall flow around the steam seal with radial teeth, its features are: bucket shroud on top of the process of sparkling teeth seal the vapor seal teeth and embedded in the inner cylinder steam seal ring on the steam seal tooth comb constitute labyrinth seal steam.
Description  Langue du texte original : Chinois
用于汽轮机高压通流的动叶整体围带径向汽封齿 High pressure turbine rotor blades for the overall flow passage with radial steam seal around the teeth

(一)技术领域本实用新型涉及汽轮机高压通流径向汽封结构。 (A) The present utility model relates to flow through the high pressure turbine steam seal radial structure.

(二)背景技术影响汽轮机机组通流效率的主要影响因素有型面损失、余速损失、泄漏损失等,其中泄漏损失主要由泄漏的漏汽量所决定,通流间的转子和静子间隙和泄漏通道结构等因素可以影响机组的泄漏量。 The main factors (two) BACKGROUND affect turbine unit through flow efficiency of a type face losses of more than speed loss, leakage losses, including leakage losses are mainly determined by the leakage of steam leakage, rotor through-flow and inter-stator gap and leakage channel structure and other factors can influence the amount of leakage of the unit. 现有的汽轮机高压通流径向汽封结构大多采用如图1所示的平齿结构,即在高压自带围带动叶片的围带叶顶处一端为平面,在内缸对应位置处布置高低齿,该结构可不用考虑机组的动静热膨胀的胀差,可以布置较多的齿数,但是单齿密封效率比较低。 Existing steam turbine high pressure seal radial flow through the structure they use a flat tooth structure shown in Figure 1, that comes at a high pressure to drive around the circumference of the blade with the tip end of the plane, including the cylinders are arranged at a position corresponding to the level of teeth, the structure can not be considered static and dynamic thermal expansion differential expansion units can be arranged more teeth, but relatively low single tooth sealing efficiency. 还有一种为台阶式高低齿汽封结构,参见图2,即在高压自带围带动叶片的围带叶顶处加工出台阶,在内缸对应位置处布置高低齿,通过在汽封流道内的耗散作用,降低压力,减少泄漏。 There is a process of step-height level steam seal tooth structure, see Figure 2, which comes at a high pressure zone around the drive around the tip of the blade, the inner cylinder is arranged at a position corresponding to the level of the teeth, sealed by steam flow channel dissipation effect, reducing pressure to reduce leakage. 这种结构由于台阶和高低齿的配合,对轴向间隙的要求比较高,其优点是单齿密封效率比较高,缺点是在同样的轴向长度内,布的齿数比较少。 Because of this structure with stairs and low teeth, axial clearance is relatively high, the advantage of a single tooth sealing efficiency is relatively high, the disadvantage is in the same axial length, less cloth teeth.

(三)发明内容本实用新型的目的在于提供一种用于汽轮机高压通流的动叶整体围带径向汽封齿,该围带径向汽封齿可增加汽封齿数,在叶顶构成梳齿迷宫式汽封,能有效防止高压部分漏汽损失。 (C) the present utility model aims to provide a high-pressure turbine rotor blades for the overall flow passage with radial steam seal around the tooth, which is surrounded with radial seal teeth can increase the steam vapor seal teeth in tip constitution Steam comb labyrinth seal, can effectively prevent the loss of high-pressure part steam leakage.

本实用新型是这样实现的:一种用于汽轮机高压通流的动叶整体围带径向汽封齿,其特征是:动叶围带顶部上加工有汽封齿,所述汽封齿与镶嵌于内缸的汽封环上的汽封齿构成梳齿迷宫式汽封。 The utility model is implemented as follows: a high pressure turbine rotor blades for the overall flow passage with radial steam seal around the tooth, which is characterized by: bucket shroud on top of the process there is steam seal teeth, teeth and said vapor seal steam seal tooth embedded in the cylinder steam seal ring constitute comb labyrinth seal steam.

本实用新型是在动叶围带叶顶上直接加工出汽封齿,与镶嵌于内缸的汽封环上的汽封齿构成梳齿迷宫式汽封,围带叶顶上的汽封齿比台阶式的高度高,齿数也可增加,使流过齿隙的蒸汽动能在下一汽室中较好的转化压力能,实际运行中每个汽封齿始终可以起到封汽的作用,从而达到减少蒸汽泄漏量,提高通流效率的目的。 The utility model is in the vapor seal around the tooth bucket with leaves on top of the direct processing of the steam seal tooth, and steam seal tooth embedded in the cylinder steam seal ring constitute comb labyrinth seal steam, surrounded with leaves on top higher than the step-height, number of teeth also increase, so that the steam flowing through the backlash of the kinetic energy of the lower chamber preferably FAW pressure energy conversion, the actual operation of each of the steam seal teeth can always function as seal steam, so as to achieve reduce steam leakage, improve the through-flow efficiency.

本实用新型相对于现有的台阶式高低齿汽封,由于齿数增加可减少漏汽量;相对于现有的平齿汽封,由于汽封齿在叶顶构成梳齿迷宫式汽封,增加了蒸汽的流动阻力,减少了高压部分漏汽量,增强密封效果,提高通流效率。 The utility model with respect to the existing level of tooth stepped steam seal, due to increase in the number of teeth can reduce the leakage of steam; flat teeth relative to the existing steam seal, due to steam seal tooth comb tip constitute labyrinth seal steam, increasing steam flow resistance, reducing the amount of high-pressure part of the steam leakage, and enhance the sealing effect, increase the through-flow efficiency.

(四)附图说明下面结合附图和具体实施方式对本实用新型作进一步说明。 (Iv) Brief description of the drawings and detailed description of the utility model for further instructions.

图1为平齿汽封结构示意图;图2为台阶式高低齿汽封结构示意图;图3为本实用新型梳齿迷宫式汽封结构示意图。 Figure 1 is a flat tooth seal structure diagram; Figure 2 is the level of tooth structure steam seal stepped schematic; Figure 3 is a utility model steam comb labyrinth seal structure diagram.

图中:1动叶(转子),2汽封环,3塞紧条,4汽封齿,5静子(内缸),6围带。 Figure: a rotor blade (rotor), two steam seal ring, 3 plugged Article 4 steam seal tooth, 5 stator (within the cylinder), 6 shroud.

(五)具体实施方式参见图3,一种用于汽轮机高压通流的动叶整体围带径向汽封齿,是在动叶1围带6顶部上加工有汽封齿4,所述汽封齿4与镶嵌于内缸5的汽封环2上的汽封齿构成梳齿迷宫式汽封。 (E) With reference to Figure 3, a high pressure turbine rotor blades for the overall flow passage with radial steam seal around the tooth, moving the leaves in a shroud on top of the process has six steam seal teeth 4, the steam 2 steam seal tooth seal teeth embedded in the inner cylinder 4 and 5 of the steam seal rings comb labyrinth seal steam. 汽封环2上的汽封齿4可采用加工或采用镶齿结构。 2 steam seal tooth on steam seal ring 4 can be processed or using inserts structure. 汽封齿4径向留有余量,装配后按要求加工配准对齿汽封的间隙即可。 4 radial steam seal tooth left margin, after assembling the required registration process steam seal tooth gap can be.

本实用新型相对原有平齿汽封结构,阻力系数更大;而相对于原有的台阶式高低齿汽封,可增加更多齿数,较大限度的降低高压通流汽封的漏汽损失,增强密封效果,提高通流效率。 The utility model is relatively flat teeth original steam seal structure, greater resistance coefficient; and with respect to the level of the original tooth stepped steam seal, add more teeth, the larger the loss limits reduce the leakage of steam flow through the high-pressure steam seal enhance the sealing effect, increase the through-flow efficiency.

Référencé par
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Classifications
Classification internationaleF01D11/08, F01D11/02
Événements juridiques
DateCodeÉvénementDescription
5 déc. 2007C14Grant of patent or utility model
11 juin 2008C41Transfer of patent application or patent right or utility model
11 juin 2008ASSSuccession or assignment of patent right
Owner name: SHANGHAI ELECTRIC POWER STATION EQUIPMENT CO.
Free format text: FORMER OWNER: SHANGHAI TURBINE CO., LTD.
Effective date: 20080509
25 janv. 2017EXPYTermination of patent right or utility model