公开(公告)号：US4968218A

公开(公告)日：1990-11-06

申请号：US412102

申请日：1989-09-25

申请人： Jorma Koivula ,  Timo Halkola ,  Reijo Nurminen

发明人： Jorma Koivula ,  Timo Halkola ,  Reijo Nurminen

IPC分类号： F04C18/16 ,  F04B49/02 ,  F04C20060101 ,  F04C28/00 ,  F04C28/24 ,  F04C29/00 ,  G05D16/20

CPC分类号： F04C28/24 ,  F04C2270/80

摘要： A method of controlling the air output of a screw compressor, wherein the average air output of the compressor during operation is adapted to air consumption by throttling the flow of suction air or by connecting the compressor alternately to full air output capacity and idle operation capacity. In order to reduce the power consumption of the compressor, the air output is controlled first by throttling the flow of suction air and by simultaneously measuring underpressure in the suction conduit of the compressor. Thereafter the compressor is controlled so as to operate alternately at full air output capacity and idle operation capacity, and the pressure rise rate in the air-pressure network is measured when the compressor operates at full output capacity and the pressure fall rate is measured when the compressor operates at idle operation capacity. The air consumption and the power consumption of the compressor with both ways of control at this particular air consumption level are calculated on the basis of the values so measured. Thereafter the compressor is connected to apply the control with the smaller power consumption.

摘要翻译： 一种控制螺杆式压缩机的空气输出的方法，其中在操作期间压缩机的平均空气输出适应于通过节流吸入空气的流量或通过将压缩机交替地连接到全空气输出能力和空转运行能力来消耗空气。 为了降低压缩机的功率消耗，首先通过节流吸入空气的流动并同时测量压缩机的吸入管道中的负压来控制空气输出。 此后，压缩机被控制成在全空气输出能力和怠速运行能力下交替工作，并且当压缩机在满输出容量下运行时测量空气压力网络中的压力上升速率，并且当 压缩机在空闲运行能力下运行。 基于这样测量的值计算在特定空气消耗水平下具有两种控制方式的压缩机的空气消耗和功率消耗。 此后，压缩机被连接以以较小的功耗施加控制。