The effect of clearance control on the performance of an oil-free linear refrigeration compressor and a comparison between using a bleed flow and a DC current bias
The effect of clearance control on the performance of an oil-free linear refrigeration compressor and a comparison between using a bleed flow and a DC current bias
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DOI：
10.1016/j.ijrefrig.2016.06.006
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发表时间：
2016-09
期刊：
影响因子：
--
通讯作者：
K. Liang;R. Stone;M. Dadd;P. Bailey
中科院分区：
文献类型：
--
作者：
K. Liang;R. Stone;M. Dadd;P. Bailey
设计了一种动磁式无油直线压缩机，用于电子冷却等应用。开发了一种使用电磁阀的控制系统，用于直流偏移和轴向间隙控制。将具有0.8 mm固定间隙的线性压缩机的操作与零DC偏移操作进行比较。固定间隙运行需要更高的功率输入。平均活塞位置可以通过驱动电压上的直流偏置或通过从压缩机主体到压缩机吸入侧的泄放流来控制。当活塞和气缸之间存在小的径向间隙时，在驱动电压上使用DC偏置引起比使用泄放流更高的功率损耗。这提供了具有容量控制的制冷系统中的活塞控制应该使用泄放流用于零DC偏移的证据。
A moving magnet type oil-free linear compressor has been designed for applications such as electronics cooling. A control system using a solenoid operated valve was developed for DC offset and axial clearance control. Operation of the linear compressor with a fixed clearance of 0.8 mm was compared with a zero DC offset operation. The fixed clearance operation requires a higher power input.The mean piston position can be controlled by using a DC bias on the drive voltage or by using a bleed flow from the compressor body to the suction side of the compressor. Using a DC bias on the drive voltage induces a higher power loss than using a bleed flow when there is a small radial clearance between the piston and cylinder. This provides evidence that the piston control in a refrigeration system with capacity control should be for a zero DC offset using a bleed flow.