CN110571983A - 一种发电机转子绝缘监测电刷装置 - Google Patents
一种发电机转子绝缘监测电刷装置 Download PDFInfo
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- CN110571983A CN110571983A CN201910800262.9A CN201910800262A CN110571983A CN 110571983 A CN110571983 A CN 110571983A CN 201910800262 A CN201910800262 A CN 201910800262A CN 110571983 A CN110571983 A CN 110571983A
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- 238000009413 insulation Methods 0.000 title claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
Abstract
一种发电机转子绝缘监测电刷装置，包括杠杆装置，杠杆装置通过杠杆轴和两侧轴承固定在机组外壳上，杠杆装置一端开槽装入碳刷，碳刷引出线穿过杠杆装置并从其下部引出，最终接到航空插头上；杠杆装置另一端连接有铁芯，铁芯与杠杆装置之间采用活动连接，铁芯穿过弹簧后插入到电磁线圈内，弹簧位于电磁线圈杠杆装置之间，当电磁线圈通电后的铁芯受到向下的电磁吸力，此时弹簧被压缩，铁芯带动杠杆装置向下移动，碳刷端举起。
Description
技术领域
此发明涉及电气控制领域，具体涉及一种发电机转子绝缘监测电刷装置。
背景技术
现有大型发电机转子多采用注入式接地保护装置，通过采用独立举刷装置 定期举起电刷与滑环轴接触，来测量转子绕组绝缘电阻值。目前，作为该保护 装置的重要组成部分的举刷装置在市面上种类较少，且现有类型碳刷均为开启 式结构，不具备防尘功能，且电刷举力偏小。举刷装置一般安装在发电机励磁 端内部，由于工业现场环境复杂，长期处于高温、多尘、电磁、风冷循环环境 中，循环冷风中的灰尘、凝结水等杂质极易进入到举刷装置内部，使装置内部 脏污、锈蚀，最终导致装置卡死，直接影响保护装置的正常运行，甚至引起误 报警导致发电机跳机。
发明内容
本发明的目的在于：鉴于现有举刷装置种类少，抗尘能力差，电刷举力小， 运行可靠性差的状况，为了适应工业现场多尘、高温、电磁、风冷循环的环境， 我们设计了一种抗尘型举刷装置，确保装置能够在恶劣的现场环境中可靠运行。
本发明的技术方案如下：一种发电机转子绝缘监测电刷装置，包括杠杆装 置，杠杆装置通过杠杆轴和两侧轴承固定在机组外壳上，杠杆装置一端开槽装 入碳刷，碳刷引出线穿过杠杆装置并从其下部引出，最终接到航空插头上；杠 杆装置另一端连接有铁芯，铁芯与杠杆装置之间采用活动连接，铁芯穿过弹簧 后插入到电磁线圈内，弹簧位于电磁线圈杠杆装置之间，当电磁线圈通电后的 铁芯受到向下的电磁吸力，此时弹簧被压缩，铁芯带动杠杆装置向下移动，碳 刷端举起。
通过航空插头将外部测量回路与碳刷联通，当碳刷被举起后可以将与碳刷 接触的转子接入到测量回路。
电磁线圈的两根引出线连接到航空插头上，通过航空插头接到外部控制回 路。
通过固定螺栓孔使用螺栓将该装置安装到其他部件上，在安装过程中使用 插针插入调整孔使碳刷举起。
通过固定螺栓孔使用螺栓将该装置安装到支架上。
本发明的显著效果在于：该装置采用杠杆原理，当电磁线圈通电吸合后， 实测杠杆另一端碳刷举力为40N，远大于同类型举刷装置。该举刷装置杠杆轴 两侧采用双封轴承，具有较强的防尘性能。经过2000次举刷测试(环境温度加 热至80℃)，装置没有出现卡涩现象，电刷运行电流波形良好，电气性能稳定
目前，该装置已应用福清核电2号发电机组上，实际运行效果良好，未出 现卡涩问题。实践证实该装置具有很广泛的应用前景及应用价值，值得推广。
附图说明
附图1是发电机转子绝缘监测电刷装置示意图。
附图2是发电机转子绝缘监测电刷装置侧视图。
附图3是发电机转子绝缘监测电刷装置顶视图。
附图4是发电机转子绝缘监测电刷装置结构图。
图中：1-碳刷 2-杠杆轴 3-轴承 4-杠杆装置 5-调整孔 6-铁芯 7-弹簧 8-航空插 头 9-电磁线圈引出线 10-定位螺栓孔 11-电磁线圈 12-机座外壳 13-碳刷引线 14-固定螺栓孔。
具体实施方式
一种发电机转子绝缘监测电刷装置，包括杠杆装置4，杠杆装置4通过杠杆 轴2和两侧轴承3固定在机组外壳12上，杠杆装置4一端开槽装入碳刷1，碳 刷引出线13穿过杠杆装置4并从其下部引出，最终接到航空插头8上。杠杆装 置4另一端连接有铁芯6，铁芯6与杠杆装置4之间采用活动连接，铁芯6穿过 弹簧7后插入到电磁线圈11内，弹簧7位于电磁线圈11与杠杆装置4之间， 当电磁线圈11通电后的铁芯6受到向下的电磁吸力，此时弹簧7被压缩，铁芯 6带动杠杆装置4向下移动，碳刷1端举起，当电磁线圈11断电后，在弹簧弹 力作用下铁芯复位，碳刷1端复位。至此，装置完成一个举刷过程。
接在碳刷1上的碳刷引线13最终接到航空插头8的一个插针上，通过航空 插头8将外部测量回路与碳刷1联通，当碳刷1被举起后可以将与碳刷1接触 的转子接入到测量回路。
电磁线圈的两根引出线9连接到航空插头8上，通过航空插头接到外部控 制回路。
可以通过固定螺栓孔14使用螺栓将该装置安装到其他部件(如支架)上， 在安装过程中可以使用插针插入调整孔5使碳刷1举起，从而确定安装位置。
Claims (5)
1.一种发电机转子绝缘监测电刷装置，其特征在于：包括杠杆装置(4)，杠杆装置(4)通过杠杆轴(2)和两侧轴承(3)固定在机组外壳(12)上，杠杆装置(4)一端开槽装入碳刷(1)，碳刷引出线(13)穿过杠杆装置(4)并从其下部引出，最终接到航空插头(8)上；杠杆装置(4)另一端连接有铁芯(6)，铁芯(6)与杠杆装置(4)之间采用活动连接，铁芯(6)穿过弹簧(7)后插入到电磁线圈(11)内，弹簧(7)位于电磁线圈(11)与杠杆装置(4)之间，当电磁线圈(11)通电后的铁芯(6)受到向下的电磁吸力，此时弹簧(7)被压缩，铁芯(6)带动杠杆装置(4)向下移动，碳刷(1)端举起。
2.根据权利要求1所述的一种发电机转子绝缘监测电刷装置，其特征在于：通过航空插头(8)将外部测量回路与碳刷(1)联通，当碳刷(1)被举起后可以将与碳刷(1)接触的转子接入到测量回路。
3.根据权利要求1所述的一种发电机转子绝缘监测电刷装置，其特征在于：电磁线圈的两根引出线(9)连接到航空插头(8)上，通过航空插头(8)接到外部控制回路。
4.根据权利要求1所述的一种发电机转子绝缘监测电刷装置，其特征在于：通过固定螺栓孔(14)使用螺栓将该装置安装到其他部件上，在安装过程中使用插针插入调整孔(5)使碳刷(1)举起。
5.根据权利要求4所述的一种发电机转子绝缘监测电刷装置，其特征在于：通过固定螺栓孔(14)使用螺栓将该装置安装到支架上。
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