IC697CBL811
IC697CBL811
IC697CBL811
液力偶合器是通过控制工作腔内工作油液的动量矩变化，来传递电动机能量，电动机通过液力偶合器的输入轴拖动其主动工作轮，对工作油进行加速，被加速的工作油再带动液力偶合器的从动工作涡轮，把能量传递到输出轴和负载。液力偶合器有调速型和限矩型之分，前者用于电气传动的调速，后者用于电机的起动。调速型液力偶合器效率最大值为95%。液力偶合器的效率计算的公式为：
式中：nT—为液力偶合器输出轴的速度（r/min）
nB—为电机侧液力偶合器输入轴的速度(r/min)
其效率为输入轴和输出轴的速度之比，调速越低，效率越低。
2、电磁调速
电磁调速系统由鼠笼异步电机、转差离合器、测速电机和控制装置组成，通过改变转差离合器的激磁电流来实现调速。转差离合器的本身的损耗是由主动部分的风阻、磨擦损耗及从动部分的机械磨擦损所产生的。如果考虑这些损耗与转差离合器的激磁功率相平衡，且忽略不计的话，其效率可用下式计算：
式中：n1――电动机的输出轴转速
n2――转差离合器的输出轴转速
其效率正比于输出转速，输出最大转速时其效率理论值为85%。
四、一甲泵、氨泵和氨水泵的变频调速节能
一甲泵、氨泵和氨水泵名义上是泵，实为压缩机。压缩机为恒转矩负载，选用SB70通用变频器。使用变频调速代替液力偶合器调速的方法是，将液力偶合器拆除，用联轴器连接电动机和负载轴。变频器可用手动调速方式控制，一般情况下一甲泵变频器的输出频率为35Hz～39Hz；氨泵变频器的输出为40Hz～44Hz，能够满足生产工艺要求。
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NEW Fanuc A16B-3200-0412/08A Main CPU Board Slot 1
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2400 Delta HV 480 Y / 277 LV
Siemens I-T-E RD63F200 Sentron Series Breaker 2000 amps
225 KVA 13800 480 277 480Y GE Dry Transber 3 Phase
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Liebert SI025277YANDE Interceptor Surge Suppressor
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XYCOM XVME-660 VME BUS XVME 660 XVME660 Inb USED
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NEW ABB Baumer 5692435L Feedback Unit PLSR 2XM0 / K10
NEW Xycom VME XVME-977 Hard / Floppy Drive Module
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2098-DSD-HV030-SE, MPL-B230P-VJ42AA, 1756-M0S3E
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SEALED Allen Bradley 1756-ENBT/A Ethernet Bridge Card
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150 Amp Square D Molded Case Circuit Breaker KC34150
150 Amp Square D Molded Case Circuit Breaker KC34150
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800 Amp Square D Molded Case Circuit Breaker MH 36800
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NEW Elwood Gettys M433-JCN0-0203 AC Servo Motor
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USED Allen Bradley 1756-LSP/B GuardLogix Processor
USED Allen Bradley 1756-LSP/B GuardLogix Processor
800 Amp Square D Molded Case Circuit Breaker MAP36800
USED Nordic 100 hp Soft Start Motor Controller 2364S00
Custom Enerpac Turbo w/ Enerpac Cylinder Press
600 Amp Westinghouse Circuit Breaker MA3800F 3 Pole
USED Siemens 4700-BDRMC3-11HN Panel Power Meter
Allen Bradley 2098-DSD-HV030 Ultra3000 Kinetix Drive
NEW Stearns 108705100EBF Self-Adjust Brake Assembly
400 Amp Square D Molded Case Circuit Breaker LHP36400MT
400 Amp Square D Molded Case Circuit Breaker LHP36400MT
REFURB Allen Bradley R2711-TC4X PanelView 1200 Terminal
Enerpac Enerpac Hydraulic Pump PEM 1521 PEM1521
NEW Norgren Herion 40892109000 Pressure Control Valve
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Lot of 37 Kromer Packers Zero Gravity Tool Balancer
SEALED Allen Bradley 1336-PB-SP23D PCB Precharge 460V
