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品牌:BENTLY | 产地:英国 | 价格:2000人民币/个 | 规格: BENTLY 20929-02自动化改变流水作业 | 简要说明: | | | | 详细介绍:
变频调速技术是目前世界公认的电机节电技术之一,具有调速范围宽、调速精度高、动态响应快、运行效率高、系统功率因数高、操作方便等一系列优点,也成为当今改造传统工业、改善工艺流程、提高生产过程自动化水平、提高产品质量、推动技术进步的主要手段之一。在石油行业中,变频器广泛应用于风机、注水泵、压缩机、输油泵、抽油机、潜油电泵和石油钻机等。
1、游梁式抽油机
目前,在油田采用的抽油设备中,以游梁式抽油机最为普遍,数量也最多。
一方面,游梁式抽油机运动为反复上下提升,一个冲程提升一次,其动力来自电动机带动的两个重量相当大的钢质滑块,当滑块提升时,类似杠杆作用,将采油机杆送入井中;滑块下降时,采油杆提出带油至井口。由于电动机转速一定,滑块下降过程中,负荷减轻,电动机拖动产生的能量无法被负载吸收。另一方面,游梁式抽油机引入两个大质量的钢质滑块,导致抽油机的起动冲击大等问题。
除述两方面问题外,油田采油的特殊地理环境决定了采油设备有其独特的运行特点:在油井开采前期储油量大,供液足,为提高功效可采用工频运行,保证较高产油量;在中后期,由于石油储量减少,易造成供液不足,电动机若仍工频运行,势必浪费电能,造成不必要损耗,这时须考虑实际工作情况,适当降低电动机转速,减少冲程,有效提高充盈率。
目前,对游梁式抽油机的交流变频调速技术改造主要有以下3个方面:
(1)以提高电网质量、减小对电网影响为目标的变频改造。这主要集中在供电企业对电网质量要求较高的场合,为避免电网质量的下降,需引入变频控制,其主要目的就是减小抽油机工作过程对电网的影响。
(2)以节能为目的变频改造。这点较为普遍,一方面,油田抽油机为克服大的起动转矩,采用的电动机远远大于实际所需功率,工作时电动机利用率一般为20%~30%,最高不会超过50%,电动机常处于轻载状态,造成资源浪费。另一方面,抽油机工作情况的变化,取决于地底下的状态,若电动机始终处于工频运行,也会造成电能浪费。为了节能,提高电动机工作效率,需进行变频改造。
(3)改变采油杆上行和下行的速度,在一些情况下可以提高生产效率。
在实际应用过程中出现了许多问题,主要集中在游梁式抽油机发电状态产生能量的处理上。对于上述情况,采用普通变频器加能耗制动单元和制动电阻可以实现,这是以消耗电能为代价的制动方式。对于上述情况,必须妥善处理电动机发电状态产生的电能,将其反馈到电网或数台抽油机变频器构成直流母线式,使这部分能量能得到充分的利用。
2、潜油电泵
油田中应用较多的另一种采油设备是潜油电泵,它是井下工作的多级离心泵,同油管一起放入油井内,地面电源通过变压器、控制器和潜油电泵专用电缆将电能输送给井下潜油电泵电动机,把油井中的液体输送到地面。
由于潜油电泵在地下两千多米的井底工作,环境非常恶劣(高温、强腐蚀等),传统供电方式工频1140伏全压,运行故障频繁,维护成本高。一方面,潜油电泵在工频启动时,启动电流大,电动机电缆压降较大;线路分布参数的影响,使得启动过程中反压较高,容易损坏电缆和电机的绝缘性,影响使用寿命。潜油电泵损坏后提到地面上修理,仅工程费一项就达5万元,价值10万元的电缆平均提上放下5次就须更换,潜油电泵平均每10个月就须维修一次,维修费用约8万元,成本较高。另一方面,潜油电泵在正常工作时,普遍存在着电动机负载率较低情况,“大马拉小车”现象严重。负载率低导致电机功率因数较低。工频工作时,始终在额定转速下,如井下油量供不应求,容易造成“死井”,则损失惨重。为解决该问题,潜油电泵应能根据井下情况变化,调节抽油量。传统调节方式是靠更换油嘴调节产量,既造成能量损失又不能精确控制,有时使得油泵长期额定转速运行;有时使得油井出沙严重,设备寿命缩短,因而有必要引入交流变频调中国上海 ——全球领先的动力管理公司近期推出了最新研发的新一代Power XL系列DG1通用变频器。新一代Power XL系列变频器专门针对现今越发严苛的商业和工业应用需求, 广泛应用于暖通空调、水处理、食品加工和商业建筑等领域。其中的DG1通用变频器以其行业领先的节能技术、高过流能力及高稳定性设计,为客户实现电力能源的更加安全、可靠、节能的管理。
电路保护和控制事业部亚太区副总裁兼总经理Christopher Butler 表示:“始终将探索能源保护的解决方案放在首位,而DG1通用变频器正很好地满足了节能这一目标。DG1通用变频器的电源装置采用了最先进的半导体技术和高度模块化结构,延续了一贯坚持产品创新以灵活应对广泛的客户需求的优良传统。”
DG1通用变频器配有享有专利的节能控制系统(Active Energy Control),通过灵活调整参数以最大限度地降低电动机的能耗,与其它同类产品相比可额外节约5%-8%的能源, 令客户快速获得投资回报。
新一代变频器在传统稳健设计的基础上增强了产品特性和功能,确保在价格合适的基础上,为客户提供最佳解决方案。产品控制模块的设计整合了当今的标准通讯协议和接口, 同时保留了可添加辅助选项卡的模块化特性。与此同时,液晶显示面板、启动向导、PC软件工具和嵌入式应用软件确保了操作简易性,而产品的标配涂层板则可以有效防止恶劣脏乱环境带来的损伤。
的电气业务在配电和电路保护、备用电源保护、控制与自动化、照明与安全、架构与布线设备、恶劣和危险环境解决方案与工程服务等诸多领域处于全球领先地位。凭借其全球化解决方案,积极应对当今世界最苛刻的电力管理挑战。
是一家全球领先的动力管理公司,2013年销售额达220亿美元。致力于提供各种节能高效的解决方案,以帮助客户更有效、更安全、更具可持续性地管理电力、流体动力和机械动力。在全球拥有约10.2万名员工,产品销往超过175多个国家和地区。
速控制系统,调节油压、调节产量。
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NEW LISTING NNB ALLEN BRADLEY N-4220-2-H00AA
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ALLEN BRADLEY AC DRIVE 1305-BA04A SERIES C *NEW IN BOX*
ALLEN BRADLEY 1336-C010-EAD USPP 1336C010EAD
ALLEN BRADLEY 7.5HP AC DRIVE 1336-B007-EJD-L3 ~ New in box
ALLEN BRADLEY MPL-B220T-VJ42AA USPP MPLB220TVJ42AA
ALLEN BRADLEY MPL-A330P-HK22AA USPP MPLA330PHK22AA
NEW Allen Bradley 1771-ACNR B ControlNet 1771ACNR B Adapter
ALLEN BRADLEY 1771-M3 SERIES B SERVO CONTROLLER MODULE *REMANUFACTURED*
Allen Bradley 1771-IXE Series D | Temperature Module *NIB*
ALLEN BRADLEY 1336S-BRF30-AN-EN5 USPP 1336SBRF30ANEN5
ALLEN BRADLEY 1336S-BRF50-AA-EN4-HAP-L6 USPP 1336SBRF50AAEN41
ALLEN BRADLEY 1785-L30B/E USPP 1785L30BE
ALLEN BRADLEY 2090-SCVG-100-0 NSFP 2090SCVG1000
ALLEN BRADLEY Y-1003-2-H00AA USPP Y10032H00AA
ALLEN BRADLEY 1326AB-B3E-21 USPP 1326ABB3E21
ALLEN BRADLEY 1326AB-B3C-11 USPP 1326ABB3C11
ALLEN BRADLEY 1336-B010-EAD-FA2-L3 USPP 1336B010EADFA2LA
ALLEN BRADLEY 1756-L55M12 -FS- 1756L55M12
ALLEN BRADLEY 20AD011A3AYNAENN USPP 20AD011A3AYNAENN
ALLEN BRADLEY 1333-EAC USPP 1333EAC
ALLEN BRADLEY 1336-RFB-48-B USPP 1336RFB48B
ALLEN BRADLEY 1336-B003-EAD-FA2-L1 USPP 1336B003EADFA2L1
ALLEN BRADLEY 1336-B003-EAD-FA2-L2 USPP 1336B003EADFA2L2
ALLEN BRADLEY 2755-L7RC USPP 2755L7RC
ALLEN BRADLEY 1336S-BRF30-AN-EN4-HA2-L6 USPP 1336SBRF30ANEN41
ALLEN BRADLEY 1336S-BRF50-AN-EN4-HA2-L6E USPP 1336SBRF50ANEN42
ALLEN BRADLEY 1336S-BRF50-AN-EN5-HA2-L6 USPP 1336SBRF50ANEN51
FACTORY SEAL ALLEN-BRADLEY 1769-L33ERM 1769L33ERM SER A , MFG 11/2013
Allen-Bradley 1771-NIVR/B
ALLEN BRADLEY 1772-MEB NSPP 1772MEB
ALLEN BRADLEY 7300-UAE-2 NSFP 7300UAE2 8月5日到这
SEALED ALLEN BRADLEY 1771-NIV1 SERIES C ANALOG MODULE MFG DATE 2012 177INIVI NIB
*NEW SEALED* 2014! 1769-L33ERM Allen Bradley CompactLogix Ethernet Controller
ALLEN BRADLEY 1305-BA02A-DE-HA2 USPP 1305BA02ADEHA2
ALLEN BRADLEY 1336F-BRF75-AA-EN USPP 1336FBRF75AAEN
ALLEN BRADLEY 1336F-BRF100-AA-EN-HASP-L6 USPP 1336FBRF100AAENE
ALLEN BRADLEY 1388-BAV20-A06 USPP 1388BAV20A06
ALLEN BRADLEY 6008-SI USPP 6008SI
ALLEN BRADLEY 1756-IF6I FNFP 1756IF6I
NEW ALLEN BRADLEY 1784-PKTXD SER B 1784-PKTX 1784PKTXD NIB
ALLEN BRADLEY 2 AXIS SERVO AC DRIVE 4100-232-L SERIES P
Allen Bradley 2711-M3A18L1A Panelview 300 Micro Keypad Terminal New FRN4.48 Fast
ALLEN BRADLEY 8500-A1D-L1B USPP 8500A1DL1B
Allen-Bradley 1756-L1M3
ALLEN BRADLEY 2094-BL02 USPP 2094BL02
ALLEN BRADLEY 1772-LN3 NSPP 1772LN3
ALLEN BRADLEY 1336-151146 NSFP 1336151146
ALLEN BRADLEY 1336-B007-EOD-L3-S1 USPP 1336B007EODL3S1
ALLEN BRADLEY 1330-BAA-GJ2L2 NSPP
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