WO2018107985A1 - 一种汽轮发电机回形油密封结构 - Google Patents

一种汽轮发电机回形油密封结构 Download PDF

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Publication number
WO2018107985A1
WO2018107985A1 PCT/CN2017/114364 CN2017114364W WO2018107985A1 WO 2018107985 A1 WO2018107985 A1 WO 2018107985A1 CN 2017114364 W CN2017114364 W CN 2017114364W WO 2018107985 A1 WO2018107985 A1 WO 2018107985A1
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Prior art keywords
sealing
oil passage
transition ring
turbine generator
oil
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PCT/CN2017/114364
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English (en)
French (fr)
Inventor
官永胜
陈文学
胡德剑
朱林重
秦川
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东方电气集团东方电机有限公司
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Application filed by 东方电气集团东方电机有限公司 filed Critical 东方电气集团东方电机有限公司
Priority to GB1908414.4A priority Critical patent/GB2571487B/en
Publication of WO2018107985A1 publication Critical patent/WO2018107985A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

Definitions

  • the invention relates to the technical field of seal structure design of a steam turbine generator, in particular to a steam generator generator return oil seal structure.
  • the main heat exchange component of a turbogenerator is a hydrogen cooler (referred to as "hydrogen cooler”, the same below), in which the cooling medium is hydrogen.
  • hydrogen is the lightest gas, it is highly permeable and diffusible, and it is easy to cause hydrogen leakage in a pressure vessel filled with hydrogen. As the amount of hydrogen leakage increases, it will affect the output of the turbine generator and even cause an explosion, resulting in a safety accident. Therefore, the turbine generator in operation has strict requirements for the leakage of hydrogen.
  • the steam turbine generator mainly adopts a single-flow ring, a double-flow ring or a three-flow ring sealing structure.
  • the sealing structure mainly has the defect that the sealing path is not completely closed, especially in the horizontal joint surface thereof.
  • the part can not fully guarantee the effective barrier between the inner hydrogen side (high pressure zone) and the outer side (low pressure zone) of the turbine generator, so that part of the hydrogen can flow from the inner hydrogen side (high pressure zone) of the turbine generator to the outside of the machine. (Low-pressure zone), which leads to defects such as air leakage and oil leakage during the operation of the steam turbine generator, especially at the horizontal joint surface, the oil leakage phenomenon also occurs frequently.
  • the working process of the steam turbine generator if there are defects such as air leakage and oil leakage, it will directly lead to a large increase in the hydrogen replenishment of the turbo generator, and correspondingly increase the application cost.
  • the technical problem to be solved by the invention is that, in view of the problems existing in the prior art, a steam generator generator return oil sealing structure is provided, the hydrogen replenishing amount of the turbo generator is reduced, and the application cost of the turbo generator is reduced. .
  • a steam generator generator return oil sealing structure comprising a transition ring, an end cover and a sealing seat, wherein the transition ring passes through the sealing plate and the end cover and the sealing seat respectively Forming a sealing structure, the transition ring has a first oil passage and a second oil passage which are mutually penetrated, and the first oil passage and the second oil passage respectively penetrate the sealing plate, and the end cover is installed a second sealing strip is embedded in the mounting groove, a sealing groove is defined in the sealing seat, and a first sealing strip is embedded in the mounting groove, and is filled in the first oil passage and the second oil passage
  • the sealing oil, the first oil passage, the second oil passage, the sealing plate, and the second sealing strip and the first sealing strip together form a return oil sealing structure.
  • a first injection hole is formed in the transition ring, and the sealing seat is opened and penetrates with the first injection hole
  • the annular injection tank forms a sealant plug through the first injection hole to fill the annular glue injection tank on the seal seat to form a sealant plug, and the sealant plug forms a sealing structure with the seal plate.
  • the transition ring has a second injection hole
  • the end cover has an annular injection groove penetrating through the second injection hole, and the annular injection groove on the end cover is passed through the second injection hole.
  • the sealant is filled to form a sealant plug, and a seal structure is formed between the sealant plug and the seal plate.
  • a main oil passage that penetrates between the transition ring and the sealing seat is disposed, and the first oil passage and the second oil passage respectively penetrate the main oil passage, and the first oil passage and the first oil passage
  • the two oil passages and the main oil passage are filled with sealing oil.
  • a first buffer tank is defined in the transition ring, and the first buffer tank is mutually penetrated with the main oil passage and the first oil passage.
  • a second buffer tank is defined in the transition ring, and the second buffer tank is mutually penetrated with the main oil passage and the second oil passage.
  • the transition ring and the sealing seat process a second horizontal joint surface research area on the transition ring, and the first horizontal joint surface research area is processed on the sealing seat, and when the transition After the ring and the sealing seat are assembled, the sum of the actual contact areas of the first horizontal joint surface research area and the second horizontal joint surface research area occupies the first horizontal joint surface research area and the first The horizontal joint surface of the two horizontal joints is more than 90% of the sum of the area of the area.
  • the invention has the beneficial effects that: the transition ring forms a sealing structure with the end cover and the sealing seat through the sealing plate, and the first oil passage, the second oil passage, the sealing plate and the second seal
  • the strip and the first sealing strip together form a return oil sealing structure, thereby enabling the present invention to have multiple sealing structures, thereby greatly blocking the hydrogen leakage from the hydrogen side of the turbo generator to the outside of the machine, thereby greatly reducing the turbine generator.
  • the amount of hydrogen replenished during operation reduces the application cost of the turbo generator and effectively improves the safe operation reliability of the turbo generator.
  • Figure 1 is a cross-sectional view showing the structure of a steam turbine generator return oil seal structure of the present invention.
  • Figure 2 is a partial enlarged view of a portion A in Figure 1.
  • 1-transition ring 2-first oil passage, 3- second buffer tank, 4-second oil passage, 5-sealing plate, 6-second sealing strip, 7-first sealing strip , 8-end cover, 9-first horizontal joint surface research area, 10-main oil passage, 11-seal seat, 12-main buffer tank, 13-third oil passage, 14-first buffer tank, 15-Second horizontal joint surface research area, 16-first injection hole, 17-sealing plug, 18-second injection hole.
  • a steam turbine generator oil return sealing structure mainly comprises a transition ring 1, an end cover 8 and a sealing seat 11, and the transition ring 1 is respectively connected to the end cover 8 through the sealing plate 5,
  • the sealing seat 11 forms a sealing structure, wherein the transition ring 1 and the end cover 8 are respectively fixed between the sealing seat 11 and the transition ring 1 by bolting, and the bolt passes through the sealing plate 5, and the sealing plate 5 is preferably
  • the rubber sheet is usually bonded directly to the transition ring 1 by the sealing plate 5.
  • the inner side of the sealing seat 11 is an inner hydrogen side
  • the outer side of the transition ring 1 is an outer side of the machine, wherein the inner hydrogen side is mainly high-pressure hydrogen, belonging to a high-voltage area of the generator, and the outer side of the machine is an air side, belonging to a low voltage of the generator. Area.
  • a mounting groove is formed in the end cover 8 and a second sealing strip 6 is engaged in the mounting groove.
  • a mounting groove is also formed in the sealing seat 11 and the first sealing strip 7 is engaged in the mounting groove.
  • a main oil passage 10 penetrating through the gap between the transition ring 1 and the sealing seat 11 is disposed, and a first oil passage 2 and a second oil passage 4 respectively intersecting the main oil passage 10 are formed on the transition ring 1 Therefore, the first oil passage 2 and the second oil passage 4 are also mutually penetrated; a corresponding through hole is formed in the sealing plate 5, and the first oil passage 2 and the second oil passage 4 are respectively penetrated
  • the sealing plate 5 is filled with sealing oil in the first oil passage 2, the second oil passage 4, and the main oil passage 10, and is composed of a first oil passage 2, a second oil passage 4, a sealing plate 5, and a second seal.
  • the strip 6 and the first sealing strip 7 together form a return oil sealing structure, and wherein the first sealing strip 7, the sealing plate 5 and the sealing oil in the first oil passage 2 together form a sealing structure, wherein the second sealing The sealing oil in the strip 6, the sealing plate 5 and the second oil passage 4 together form a sealing structure.
  • the cross-sectional shape of the first weather strip 7 is preferably flared so that the first weather strip 7 is securely engaged in the mounting groove on the sealing seat 11.
  • the cross-sectional shape of the second weather strip 6 is preferably flared so that the second weather strip 6 is securely engaged in the mounting groove on the end cap 8.
  • the first sealing strip 7 and the second sealing strip 6 are preferably annular rubber strips.
  • a first injection hole 16 and a second injection hole 18 may be defined in the transition ring 1 , and an annular injection groove penetrating through the first injection hole 16 may be formed in the sealing seat 11 .
  • the sealant plug 17 is formed by filling the sealant in the annular glue injection tank on the seal seat 11 through the first glue injection hole 16, and the sealant plug 17 forms a sealing structure with the seal plate 5.
  • An annular injection tank penetrating through the second injection hole 18 is formed in the end cover 8 , and a sealant plug is formed by filling the sealant into the annular injection tank on the end cover 8 through the second injection hole 18 .
  • a seal structure is formed between the sealant plug 17 and the seal plate 5.
  • the injection molding is performed by the first injection hole 16 and the second injection hole 18, so that the steam generator return oil seal structure of the invention has a double loop injection molding sealing surface structure, which greatly reduces the steam turbine generator. The amount of hydrogen replenished during operation reduces the application cost of the turbo generator and effectively improves the safe operation reliability of the turbo generator.
  • a first buffer tank 14 and a second buffer tank 3 may be opened on the transition ring 1, the first A buffer tank 14 penetrates the main oil passage 10 and the first oil passage 2, and the second buffer tank 3 penetrates the main oil passage 10 and the second oil passage 4, respectively.
  • the first buffer tank 14 adopts a strip-shaped groove, and two ends thereof respectively form a circular arc-shaped transition portion; preferably, the second buffer tank 3 adopts a circular groove.
  • a main buffer tank 12 and a third oil passage 13 which penetrate each other may be formed in the sealing seat 11, and the main buffer tank 12 and the main oil passage 10 penetrate each other.
  • a return oil groove sealing structure is formed between the transition ring 1 and the sealing seat 11.
  • the steam is further enhanced by the combination of the return oil groove sealing structure and the embedded sealing structure formed by the first sealing strip 7 and the sealing seat 11 and the embedded sealing structure formed by the second sealing strip 6 and the end cover 8.
  • the full path of the wheel generator at the horizontal joint surface is closed to ensure the barrier between the hydrogen inside the turbine generator and the air outside the turbine generator, which greatly reduces the leakage and oil leakage of the turbine generator during operation.
  • the leakage phenomenon effectively improves the safe operation capability of the turbine generator.
  • the transition ring 1, the end cover 8, and the sealing seat 11 can be processed into the second horizontal joint surface research area 15 on the transition ring 1, and the first level is processed on the sealing seat 11.
  • the joint surface is arranged in the area 9.
  • the "study fit" here refers to a metal working process for planar roughness processing of the metal mating surface, and the purpose is to improve the actual contact area when the metal mating surfaces are mated with each other.
  • the first horizontal joint surface research area 9 and the second horizontal joint surface research area 15 cover the main oil passage 10, and the second horizontal joint surface research area 15 covers the first oil passage 2 and the second In the oil passage 4, a sealant may be added to the contact surface of the first horizontal joint surface and the second horizontal joint surface 15 for the joint surface.
  • the first sealing strip 7 forms a sealing structure with the first oil passage 2 and the sealing plate 5, respectively, and the second sealing strip 6 respectively
  • the two oil passages 4 and the sealing plate 5 form a sealing structure; and the sum of the actual contact areas of the first horizontal joint surface research area 9 and the second horizontal joint surface research area 15 is preferably The sum of the areas of the first horizontal joint surface research area 9 and the second horizontal joint surface area 15 is 90% or more.
  • the steam turbine generator shaped oil seal structure of the invention has fewer components and the assembly between the relevant component parts is relatively simple, so that the overall structure of the steam generator generator return oil seal structure is relatively simple and compact. And easy to assemble.
  • the glue injection gun can be directly used to perform the injection operation to the first injection hole 16 and the second injection hole 18 with a certain injection pressure. form.
  • the sealant plug 17 has a tapered shape in cross section to improve the seismic performance and sealing reliability of the sealant plug 17 during operation of the turbo generator.

Abstract

一种汽轮发电机回形油密封结构，包括过渡环(1)、端盖(8)和密封座(11)，过渡环(1)通过密封板(5)分别与端盖(8)、密封座(11)形成密封结构，过渡环(1)上开设相互贯通的第一支油道(2)、第二支油道(4)，第一支油道(2)、第二支油道(4)分别贯穿密封板(5)，端盖(8)上开设安装槽且在安装槽中嵌接第二密封条(6)，密封座(11)上开设安装槽且在安装槽中嵌接第一密封条(7)，在第一支油道(2)、第二支油道(4)中填充密封油，第一支油道(2)、第二支油道(4)、密封板(5)以及第二密封条(6)和第一密封条(7)共同形成回形油密封结构。该汽轮发电机回形油密封结构能够减少汽轮发电机运行时的补氢量，降低了汽轮发电机的应用成本，并使汽轮发电机的安全运行可靠性得以有效地提高。

Description

一种汽轮发电机回形油密封结构 技术领域
本发明涉及汽轮发电机的密封结构设计技术领域，尤其是涉及一种汽轮发电机回形油密封结构。
背景技术
汽轮发电机的主要热交换部件是氢气冷却器(简称“氢冷器”，下同)，其中的冷却介质是氢气。由于氢气是最轻的气体，其渗透性和扩散性均很强，在装满氢气的压力容器中很容易造成氢气泄漏。随着氢气泄漏量的不断增加，将影响到汽轮发电机的出力，甚至引起爆炸，从而造成安全事故，因此，运行中的汽轮发电机对于氢气的泄漏量有着严格的要求。
目前的汽轮发电机主要采用单流环、双流环或三流环密封结构，这种密封结构在汽轮发电机工作过程中主要存在密封路径不完全封闭的缺陷，尤其是在其水平合缝面部位，不能充分保证汽轮发电机的内氢侧(高压区)与机外侧(低压区)之间的有效阻隔，使部分氢气得以从汽轮发电机的内氢侧(高压区)流向机外侧(低压区)，从而导致汽轮发电机工作时存在漏气、漏油等缺陷，尤其是在水平合缝面处，漏油现象也比较频繁发生。在汽轮发电机工作过程中，如果发生漏气、漏油等缺陷时，将直接导致汽轮发电机的补氢量大增，相应地也增加了应用成本。
发明内容
本发明要解决的技术问题是：针对现有技术存在的问题，提供一种汽轮发电机回形油密封结构，减少汽轮发电机运行时的补氢量，降低汽轮发电机的应用成本。
本发明要解决的技术问题采用以下技术方案来实现：一种汽轮发电机回形油密封结构，包括过渡环、端盖和密封座，所述过渡环通过密封板分别与端盖、密封座形成密封结构，所述过渡环上开设相互贯通的第一支油道、第二支油道，所述第一支油道、第二支油道分别贯穿密封板，所述端盖上开设安装槽且在所述安装槽中嵌接第二密封条，所述密封座上开设安装槽且在所述安装槽中嵌接第一密封条，在第一支油道、第二支油道中填充密封油，所述第一支油道、第二支油道、密封板以及第二密封条和第一密封条共同形成回形油密封结构。
优选地，所述的过渡环上开设第一注胶孔，所述密封座上开设与第一注胶孔贯通 的环形注胶槽，通过第一注胶孔向密封座上的环形注胶槽内填充密封胶而形成密封胶堵头，所述密封胶堵头与密封板之间形成密封结构。
优选地，所述的过渡环上开设第二注胶孔，所述端盖上开设与第二注胶孔贯通的环形注胶槽，通过第二注胶孔向端盖上的环形注胶槽内填充密封胶而形成密封胶堵头，所述密封胶堵头与密封板之间形成密封结构。
优选地，所述过渡环与密封座之间设置相互贯通的主油道，所述的第一支油道、第二支油道分别与主油道相互贯通，在第一支油道、第二支油道、主油道中填充密封油。
优选地，所述过渡环上开设第一缓冲槽，所述第一缓冲槽分别与主油道、第一支油道相互贯通。
优选地，所述过渡环上开设第二缓冲槽，所述第二缓冲槽分别与主油道、第二支油道相互贯通。
优选地，所述的过渡环、密封座在装配前，在过渡环上加工出第二水平合缝面研配区域，在密封座上加工出第一水平合缝面研配区域，且当过渡环、密封座装配到位后，所述第一水平合缝面研配区域、第二水平合缝面研配区域的实际接触面积之和占到所述第一水平合缝面研配区域与第二水平合缝面研配区域面积之和的90％以上。
与现有技术相比，本发明的有益效果是：由于过渡环通过密封板分别与端盖、密封座形成密封结构，且第一支油道、第二支油道、密封板以及第二密封条和第一密封条共同形成回形油密封结构，因此，使得本发明具有多重密封结构，从而能够极大地阻隔汽轮发电机内氢侧的氢气向机外侧泄漏，大大减少了汽轮发电机运行时的补氢量，降低了汽轮发电机的应用成本，并有效提高了汽轮发电机的安全运行可靠性。
附图说明
图1为本发明一种汽轮发电机回形油密封结构的构造剖视图。
图2为图1中A处的局部放大图。
图中标记：1-过渡环，2-第一支油道，3-第二缓冲槽，4-第二支油道，5-密封板，6-第二密封条，7-第一密封条，8-端盖，9-第一水平合缝面研配区域，10-主油道，11-密封座，12-主缓冲槽，13-第三支油道，14-第一缓冲槽，15-第二水平合缝面研配区域，16-第一注胶孔，17-密封胶堵头，18-第二注胶孔。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，下面结合附图和具体实施 例对本发明进行详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
如图1、图2所示的一种汽轮发电机回形油密封结构，主要包括过渡环1、端盖8和密封座11，所述过渡环1通过密封板5分别与端盖8、密封座11形成密封结构，其中的过渡环1与端盖8之间、密封座11与过渡环1之间可以分别通过螺栓连接固定，且螺栓穿过密封板5，所述密封板5优选为橡胶板，通常，是将密封板5直接粘接到过渡环1上。所述密封座11的内侧为内氢侧，所述过渡环1的外侧为机外侧，其中，内氢侧主要是高压氢气，属于发电机高压区，而机外侧为空气侧，属于发电机低压区。在端盖8上开设安装槽且在所述安装槽中嵌接第二密封条6，在密封座11上也开设安装槽且在所述安装槽中嵌接第一密封条7。
所述的过渡环1与密封座11之间设置相互贯通的主油道10，并在过渡环1上开设分别与主油道10相互贯通的第一支油道2、第二支油道4，从而使第一支油道2与第二支油道4之间也相互贯通；在密封板5上开设相应的贯通口，所述第一支油道2、第二支油道4分别贯穿密封板5，在第一支油道2、第二支油道4、主油道10中填充密封油，由第一支油道2、第二支油道4、密封板5以及第二密封条6和第一密封条7共同形成回形油密封结构，并且，其中的第一密封条7、密封板5和第一支油道2中的密封油共同形成密封结构，其中的第二密封条6、密封板5和第二支油道4中的密封油共同形成密封结构。所述第一密封条7的截面形状优选为喇叭形，以便第一密封条7牢固地嵌接在密封座11上的安装槽中。同样地，所述第二密封条6的截面形状优选为喇叭形，以便第二密封条6牢固地嵌接在端盖8上的安装槽中。所述的第一密封条7、第二密封条6优选采用环形的橡胶条。
考虑到汽轮发电机在工作时，其内氢侧的高压氢气的渗透性、扩散性均很强，为了更好地避免发电机内氢侧的高压氢气泄漏至发电机低压区的机外侧，如图1、图2所示，可以在过渡环1上开设第一注胶孔16和第二注胶孔18，在密封座11上开设与第一注胶孔16贯通的环形注胶槽，通过第一注胶孔16向密封座11上的环形注胶槽内填充密封胶而形成密封胶堵头17，所述的密封胶堵头17与密封板5之间形成密封结构。在端盖8上开设与第二注胶孔18贯通的环形注胶槽，通过第二注胶孔18向端盖8上的环形注胶槽内填充密封胶而形成密封胶堵头17，所述密封胶堵头17与密封板5之间形成密封结构。通过第一注胶孔16、第二注胶孔18进行注胶，使得本发明的汽轮发电机回形油密封结构具有双环路注胶把合密封面结构，极大地减少了汽轮发电机 运行时的补氢量，降低了汽轮发电机的应用成本，并有效地提高了汽轮发电机的安全运行可靠性。
为了进一步地提高上述汽轮发电机回形油密封结构的密封可靠性，如图1、图2所示，可以在过渡环1上开设第一缓冲槽14、第二缓冲槽3，所述第一缓冲槽14分别与主油道10、第一支油道2相互贯通，所述第二缓冲槽3分别与主油道10、第二支油道4相互贯通。优选地，所述第一缓冲槽14采用条形槽，其两端分别形成圆弧形过渡部；优选地，所述第二缓冲槽3采用圆形槽。另外，在密封座11上可以开设相互贯通的主缓冲槽12、第三支油道13，所述的主缓冲槽12与主油道10之间相互贯通。采用这样的结构设计后，使得过渡环1与密封座11之间形成回形油槽密封结构。通过回形油槽密封结构与由第一密封条7与密封座11所形成的嵌入式密封结构以及由第二密封条6与端盖8所形成的嵌入式密封结构相结合，进一步地增强了汽轮发电机在水平合缝面处的全路径封闭，确保汽轮发电机内侧的氢气与汽轮发电机外侧的空气之间的阻隔，大大减少了汽轮发电机工作时的漏气、漏油等泄漏现象，有效地提高了汽轮发电机的安全运行能力。
进一步地，所述的过渡环1、端盖8、密封座11在装配前，可以在过渡环1上加工出第二水平合缝面研配区域15，在密封座11上加工出第一水平合缝面研配区域9，此处的“研配”是指对金属配合面进行平面粗糙度加工的金属加工工艺，目的是提高金属配合面相互配合时的实际接触面积。所述的第一水平合缝面研配区域9、第二水平合缝面研配区域15覆盖主油道10，第二水平合缝面研配区域15覆盖第一支油道2、第二支油道4，在第一水平合缝面研配区域9、第二水平合缝面研配区域15的接触贴合面还可以加密封胶。当过渡环1、端盖8、密封座11在装配到位后，所述第一密封条7分别与第一支油道2、密封板5形成密封结构，所述第二密封条6分别与第二支油道4、密封板5形成密封结构；且其中的第一水平合缝面研配区域9、第二水平合缝面研配区域15的实际接触面积之和最好是占到所述第一水平合缝面研配区域9与第二水平合缝面研配区域15的面积之和的90％以上。通过对汽轮发电机水平合缝面提出研配接触面积、加密封胶的要求，可以更好地保证汽轮发电机回形油密封结构对发电机内氢侧的氢气与机外侧的空气之间的有效阻隔，避免汽轮发电机工作时在水平合缝面处发生漏气、漏油等泄漏现象，以确保汽轮发电机的安全运行能力。
本发明的汽轮发电机回形油密封结构的组成部件较少，且各相关组成部件之间的装配比较简单，因此，使得汽轮发电机回形油密封结构的整体构造相对简单、紧凑， 且装配方便。其中，对于汽轮发电机回形油密封结构中的密封胶堵头17，可以直接采用注胶枪向第一注胶孔16、第二注胶孔18中以一定注射压力进行注胶操作而形成。优选地，所述密封胶堵头17的截面形状呈锥形结构，以提高密封胶堵头17在汽轮发电机工作时的抗震性能和密封可靠性。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，应当指出的是，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (7)

  1. 一种汽轮发电机回形油密封结构，包括过渡环(1)、端盖(8)和密封座(11)，所述过渡环(1)通过密封板(5)分别与端盖(8)、密封座(11)形成密封结构，其特征在于：所述的过渡环(1)上开设相互贯通的第一支油道(2)、第二支油道(4)，所述第一支油道(2)、第二支油道(4)分别贯穿密封板(5)，所述端盖(8)上开设安装槽且在所述安装槽中嵌接第二密封条(6)，所述密封座(11)上开设安装槽且在所述安装槽中嵌接第一密封条(7)，在第一支油道(2)、第二支油道(4)中填充密封油，所述第一支油道(2)、第二支油道(4)、密封板(5)以及第二密封条(6)和第一密封条(7)共同形成回形油密封结构。
  2. 根据权利要求1所述的一种汽轮发电机回形油密封结构，其特征在于：所述的过渡环(1)上开设第一注胶孔(16)，所述密封座(11)上开设与第一注胶孔(16)贯通的环形注胶槽，通过第一注胶孔(16)向密封座(11)上的环形注胶槽内填充密封胶而形成密封胶堵头(17)，所述密封胶堵头(17)与密封板(5)之间形成密封结构。
  3. 根据权利要求1所述的一种汽轮发电机回形油密封结构，其特征在于：所述的过渡环(1)上开设第二注胶孔(18)，所述端盖(8)上开设与第二注胶孔(18)贯通的环形注胶槽，通过第二注胶孔(18)向端盖(8)上的环形注胶槽内填充密封胶而形成密封胶堵头(17)，所述密封胶堵头(17)与密封板(5)之间形成密封结构。
  4. 根据权利要求1-3任一项所述的一种汽轮发电机回形油密封结构，其特征在于：所述过渡环(1)与密封座(11)之间设置相互贯通的主油道(10)，所述的第一支油道(2)、第二支油道(4)分别与主油道(10)相互贯通，在第一支油道(2)、第二支油道(4)、主油道(10)中填充密封油。
  5. 根据权利要求4所述的一种汽轮发电机回形油密封结构，其特征在于：所述过渡环(1)上开设第一缓冲槽(14)，所述第一缓冲槽(14)分别与主油道(10)、第一支油道(2)相互贯通。
  6. 根据权利要求4所述的一种汽轮发电机回形油密封结构，其特征在于：所述过渡环(1)上开设第二缓冲槽(3)，所述第二缓冲槽(3)分别与主油道(10)、第二支油道(4)相互贯通。
  7. 根据权利要求4所述的一种汽轮发电机回形油密封结构，其特征在于：所述的过渡环(1)、密封座(11)在装配前，在过渡环(1)上加工出第二水平合缝面研配区 域(15)，在密封座(11)上加工出第一水平合缝面研配区域(9)，且当过渡环(1)、密封座(11)装配到位后，所述第一水平合缝面研配区域(9)、第二水平合缝面研配区域(15)的实际接触面积之和占到所述第一水平合缝面研配区域(9)与第二水平合缝面研配区域(15)面积之和的90％以上。
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