核磁共振成像MRI低温系统维修

发布者:
合肥迅即
最后修订:
2017年06月01日 06:41
核磁共振成像MRI维修 956




 

 
 
 
 

 

        超导MRI的磁体结构复杂.它主要由保温层、液氦层和线圈层组成。保温层的作用是将环境温度与液氦层隔绝开来, 尽可能的减少液氦消耗。液氦层的作用是将线圈降温到零下260多度,达到超导临界点,使线圈成为超导体。最里面的线圈实现超导后,电阻消失,电流无损耗,可以产生最大磁场。
  无论采取什么方法,漏热是不可避免的,所以,液氦总会吸热蒸发。为减少液氦蒸发,科学家使用了低温系统。这个系统能将保温层的温度降到20K以下,有的甚至达到了超导温度,有效控制了液氦的损耗。
  低温系统由制冷机冷头),氦压缩机水冷机和连接管线等几个部分组成。冷头是作用是制造冷量,并将冷量传递到保温层。压机的作用,是将冷头制冷过程产生的热量带回压缩机。压机从冷头带回的热量,以及压机机械运动产生的热量,就靠水冷机来降温。

 

 

 

 

 

       飞利浦、GE、西门子、东芝、东软、奥泰、安科、日立、万东、鑫高益核磁共振成像MRI冷头更换、氦压缩机维修更换、水冷机/冷水机组维修更换,联系电话:+8613805690379.

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Complex of MRI superconducting magnet structure which consists of the insulation layer, and a coil layers helium layer. Insulation layer is the role of environmental temperature and liquid helium layer cut off as much as possible to reduce helium consumption. The role of helium layer is cooled to minus coil over 260 degrees, reaching the superconducting critical point, so that the coil become superconducting. Implementation innermost superconducting coil, the resistance disappeared without loss of current, maximum magnetic field can be generated.
No matter what method of heat leakage is inevitable, therefore, always endothermic evaporation of liquid helium. To reduce liquid helium evaporation, the scientists used a cryogenic system. This system can insulation temperature drops 20K or less, and some even reached the superconducting temperature, effective control of the liquid helium loss.
Cryogenic system consists refrigerator (cold head), helium compressors, water-cooled machine and connecting pipelines and several other components. Role is to manufacture cold head is cold and cold passed to the insulation layer. The role of the press, is generated during the cold head heat back to the refrigeration compressor. Presses the heat from the cold head back and presses the heat generated by the mechanical movement, they rely on water-cooled machine to cool down.

 

        Philips, GE, Siemens, Toshiba, Neusoft, Alltech, Anke, Hitachi, Wandong, magnetic resonance imaging MRI Xingaoyi cold head replacement, repair and replacement of helium compressor, water-cooled machine / chiller repair and replacement, contact +8613805690379.

Shimming, transfer machines, spare parts supply.











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