JP5782301B2 - 発電機におけるシール漏れおよびシール油汚染の検出 - Google Patents
発電機におけるシール漏れおよびシール油汚染の検出 Download PDFInfo
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- JP5782301B2 JP5782301B2 JP2011131726A JP2011131726A JP5782301B2 JP 5782301 B2 JP5782301 B2 JP 5782301B2 JP 2011131726 A JP2011131726 A JP 2011131726A JP 2011131726 A JP2011131726 A JP 2011131726A JP 5782301 B2 JP5782301 B2 JP 5782301B2
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- 238000011109 contamination Methods 0.000 title claims description 19
- 238000001514 detection method Methods 0.000 title description 5
- 239000000112 cooling gas Substances 0.000 claims description 75
- 239000007789 gas Substances 0.000 claims description 49
- 239000000203 mixture Substances 0.000 claims description 37
- 239000001257 hydrogen Substances 0.000 claims description 29
- 229910052739 hydrogen Inorganic materials 0.000 claims description 29
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 26
- 230000004044 response Effects 0.000 claims description 15
- 230000003068 static effect Effects 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 41
- 230000008569 process Effects 0.000 description 36
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- 238000011084 recovery Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 230000000670 limiting effect Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/24—Protection against failure of cooling arrangements, e.g. due to loss of cooling medium or due to interruption of the circulation of cooling medium
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
- G01M3/18—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/183—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for pipe joints or seals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/223—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for pipe joints or seals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2853—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipe joints or seals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3254—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers using a flow detector
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/14—Casings; Enclosures; Supports
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
-
- 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
- H02K5/124—Sealing of shafts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/08—Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/10—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
- H02K9/12—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing wherein the cooling medium circulates freely within the casing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/20—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Cooling System (AREA)
- Motor Or Generator Frames (AREA)
Description
102 ケーシング
103 冷却ガス
104 ロータ
106 ステータ
107 発電機
108 冷却ガス源
110 冷却ガス調整器
112 発電機制御システム
114 溶接継ぎ手
120 エンドハウジング
121 シールシステム
122 軸シールリング
123 シール領域
124 シール油
125 油回収システム
126 シール油タンク
127 シール油フィルタ
128 制御弁システム
130 排出システム
132 ガス混合物
133 通気孔
134 タンク
134 制御弁システム
140 純度センサ
142 ガス混合物流量センサ
144 温度センサ
146 シール油センサ
148 圧力差センサ
150 シール油ケーシング−ハウジング差圧調整器
150 静止シール漏れ検出器
170 静止シール漏れ検出器
172 シール油汚染検出器
174 問題検出器
176 シールリング隙間検出器
Claims (6)
- ロータの少なくとも一部分を取り囲み、その周りである体積の冷却ガスを密閉するケーシングであって、複数の静止シールを含むケーシングと、
前記ケーシングの各端部にあるエンドハウジングであって、各エンドハウジングがシールシステムを含み、前記シールシステムを前記ロータが貫通し、前記冷却ガスの一部分が、前記ケーシングから前記エンドハウジング内の少なくとも1つのシール領域へ逃れる、エンドハウジングと、
前記ケーシング内で実質上一定の圧力を維持するように冷却ガスの流れを前記ケーシングへ送達する、冷却ガス調整器によって前記ケーシングに流体的に結合された冷却ガス源と、
前記逃れる冷却ガスの一部分を含むガス混合物を除去する、各エンドハウジングに結合された排出システムと、
前記ケーシングで前記冷却ガスの純度を判定する純度センサと、
前記冷却ガス調整器において冷却ガスの流量が、冷却ガス流量閾値と比較して増大したこと、
前記ケーシングにおいて前記冷却ガスの純度が、対応する純度閾値と比較して増大したこと、および
排出システムにおいて前記ガス混合物の流量が、ガス混合物流量閾値と比較して増大したこと、
のうちの少なくとも1つに応答して、前記複数の静止シールの少なくとも1つにおける漏れを示す警報を生成する静止シール漏れ検出器と、
を備え、
前記冷却ガス源が、前記冷却ガスの加圧タンクを含む、
システム。 - 前記冷却ガスが水素を含む、請求項1に記載のシステム。
- 前記冷却ガスの流量と前記純度がそれぞれ、複数の測定データの移動平均として計算される、請求項1または2に記載のシステム。
- 前記シールシステムの少なくとも1つを通るシール油のシール油のシール油流量を感知するシール油センサと、
前記シール油の排油温度を判定する温度センサと、
シール油フィルタの両端間のシール油フィルタ差圧を判定する圧力差センサと、
前記シール油流量がシール油流量閾値を超過すること、前記排油温度が排油温度閾値より低いこと、および前記シール油フィルタ差圧がシール油フィルタ圧力差閾値を超過することに応答して、前記シール油の汚染を示す警報を生成するシール油汚染検出器と、
をさらに備える、請求項1から3のいずれかに記載のシステム。 - シール油ケーシング−ハウジング差圧が前記ケーシング内の冷却ガス圧力よりも高くなるように維持する、シール油ケーシング−ハウジング差圧調整器と、
問題検出器と、
をさらに備え、
前記問題検出器が、
前記シール油流量が前記シール油流量閾値を超過すること、前記排油温度が前記排油温度閾値より低いこと、前記シール油フィルタ差圧が前記シール油フィルタ圧力差閾値より低いこと、および前記シール油ケーシング−ハウジング差圧がシール油ケーシング−ハウジング差圧閾値を超過することに応答して、システム障害を示す第1の警報を生成し、また
前記シール油流量が前記シール油流量閾値を超過すること、前記排油温度が前記排油温度閾値より低いこと、前記シール油フィルタ差圧が前記シール油フィルタ圧力差閾値より低いこと、および前記シール油ケーシング−ハウジング差圧が前記シール油ケーシング−ハウジング差圧閾値より低いことに応答して、組立て誤差または熱膨張を示す第2の警報を生成する、
請求項4に記載のシステム。 - 前記排出システムが、第1の排出速度および前記第1の排出速度より遅い第2の排出速度で前記ガス混合物を除去する制御弁システムを含み、
前記制御弁システムが前記第1の排出速度で動作する時間と前記第2の排出速度で動作する時間の比が排出速度比閾値を超過することに応答して、軸シールリングの隙間の増大を示す警報を生成するシールシステム隙間検出器をさらに備える、
請求項1から5のいずれかに記載のシステム。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/817,260 | 2010-06-17 | ||
US12/817,260 US8344676B2 (en) | 2010-06-17 | 2010-06-17 | Seal leakage and seal oil contamination detection in generator |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2012005343A JP2012005343A (ja) | 2012-01-05 |
JP2012005343A5 JP2012005343A5 (ja) | 2014-07-31 |
JP5782301B2 true JP5782301B2 (ja) | 2015-09-24 |
Family
ID=44357615
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2011131726A Active JP5782301B2 (ja) | 2010-06-17 | 2011-06-14 | 発電機におけるシール漏れおよびシール油汚染の検出 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8344676B2 (ja) |
JP (1) | JP5782301B2 (ja) |
KR (1) | KR101863151B1 (ja) |
DE (1) | DE102011051051B4 (ja) |
GB (1) | GB2481297B (ja) |
Families Citing this family (19)
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EP2341599A1 (en) * | 2010-01-05 | 2011-07-06 | Alstom Technology Ltd | Improved sealed electric generator |
JP5860696B2 (ja) * | 2011-01-05 | 2016-02-16 | ゼネラル・エレクトリック・カンパニイ | 発電機のシール漏れとシールオイル汚染の検出 |
KR101416448B1 (ko) * | 2012-11-28 | 2014-07-10 | 동아공업 주식회사 | 스팀과 유압을 이용한 실린더 헤드 가스켓의 성능 시험장치 |
JP2015195668A (ja) * | 2014-03-31 | 2015-11-05 | ファナック株式会社 | シール部材を備えた電動機及び電動機の製造方法 |
US9618418B2 (en) * | 2014-11-14 | 2017-04-11 | Asm Technology Singapore Pte Ltd | System and method for detecting leakage in a gas pipeline |
CN105115673A (zh) * | 2015-07-23 | 2015-12-02 | 北京中科宇盛安全技术有限公司 | 一种智能型安全阀密封试验系统 |
CN105021361A (zh) * | 2015-07-23 | 2015-11-04 | 蚌埠市特种设备监督检验中心 | 一种安全阀密封试验方法 |
CN105021360A (zh) * | 2015-07-31 | 2015-11-04 | 苏州宏展信息科技有限公司 | 一种医疗器械器件气密性检测控制系统 |
CN105157932A (zh) * | 2015-07-31 | 2015-12-16 | 苏州宏展信息科技有限公司 | 一种基于低噪声放大器的器件气密性监控系统 |
CN105300623B (zh) * | 2015-11-17 | 2017-12-19 | 哈尔滨电机厂有限责任公司 | 一种检查汽轮发电机端盖合口面密封性的蓝检试验方法 |
CN106181588A (zh) * | 2016-07-13 | 2016-12-07 | 哈尔滨电机厂有限责任公司 | 一种汽轮发电机端盖合口面研磨工艺方法 |
US10429370B2 (en) | 2017-05-16 | 2019-10-01 | General Electric Company | Dynamoelectric machine sealing oil monitoring system, computer program product and related methods |
EP3407474A1 (en) * | 2017-05-22 | 2018-11-28 | General Electric Technology GmbH | Multiple mode hydrogen release system and method for a hydrogen cooled generator |
US10704704B2 (en) | 2017-07-14 | 2020-07-07 | Hamilton Sundstrand Coproration | Permanent magnet generator case vent valve |
DE102017215597A1 (de) * | 2017-09-05 | 2019-03-07 | Siemens Aktiengesellschaft | Wasserstoff-gekühlter Turbogenerator mit kontinuierlich hoher H2-Reinheit |
CN108494143B (zh) * | 2018-04-16 | 2021-03-02 | 山东齐鲁电机制造有限公司 | 一种空冷汽轮发电机轴封系统 |
KR102402028B1 (ko) * | 2020-06-12 | 2022-05-24 | 명화공업주식회사 | 구동모터 냉각 시스템 |
CN111773800B (zh) * | 2020-07-14 | 2022-03-15 | 安徽池州九华发电有限公司 | 一种发电机组密封油净化系统及其使用方法 |
WO2022144934A1 (en) * | 2020-12-31 | 2022-07-07 | Mavel edt S.p.A. | Stator with closed slots with continuous winding for an electric machine and process for making such stator |
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US4792911A (en) * | 1986-01-17 | 1988-12-20 | Westinghouse Electric Corp. | Diagnostic apparatus for an electric generator seal oil system |
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US20060057727A1 (en) * | 2004-09-16 | 2006-03-16 | Speranza A J | System for monitoring the health of electrical generators and method thereof |
JP4482001B2 (ja) * | 2007-01-15 | 2010-06-16 | 株式会社日立製作所 | 強制冷却型回転電機 |
US20090302543A1 (en) | 2008-06-09 | 2009-12-10 | General Electric Company | Sealing systems for rotary machines and methods for modification |
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KR20110137753A (ko) | 2011-12-23 |
GB2481297A (en) | 2011-12-21 |
JP2012005343A (ja) | 2012-01-05 |
DE102011051051B4 (de) | 2021-05-27 |
US8344676B2 (en) | 2013-01-01 |
GB2481297B (en) | 2017-11-15 |
KR101863151B1 (ko) | 2018-06-01 |
US20110309780A1 (en) | 2011-12-22 |
DE102011051051A1 (de) | 2011-12-22 |
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