
辅机应用 Auxiliay Applicsion
变频调速冷却系统在螺杆空压机控制中的应用王桂荣,陈鹏高
(上海斯可络压缩机有限公司,上海201504)
[摘要]:目前市场上运行的变频螺杆空压机普遍采用温控阀控制和调节排气温度,在该传统结构基础上,基于其运行可靠性和节能降噪角度上,提出变频螺杆空压机配套应用变频调速冷却系统控制排气温度的新思路,综合概述该系统控制原理、技术条件、结构配置等;进而描述方案具体实施细节,从系统参数设置、系统工作流程等方面进行论述,对使用中的重点关键点进行了研究和分析,给出了行之有效的方法;并与传统控制方式进行比较的基础上总结该系统结构的优点,肯定了变频调速冷却系统代替传统温控闽控制排气温度技术可行性和经济性,为变频螺杆空压机供气领域的技术革新,开辟了切实有效的途径。
[关键调]:变频调速冷却系统;螺杆空压机;变频器;PID控制
中图分类号:TH455;TK414.2
文献标志码:B
文章编号:1006-2971(2014)04-0050-04
ApplicationofConversionFrequencyCoolingSysteminScrewAirCompressorControl WANG Gui-rong, CHEN Peng-gao
(Shanghai Serew Compressor Co., Lid., Shanghai 201504, China)
Abstract:Thermostatic valve configuration is widely used in conversion frequency oilflooded screw air compressor to control the ex-haust temperature in the market, a new idea deserves to control the exhaust temperature by conversion frequency cooling system based on its reliability, energy saving and noise reduction aimed at the traditional configuration. Then control strategy, technical specification, system configuration is summarized, and the practical implementation of details from system parameter setting, working process, etc. is deseribed. The eritical issues in operation are researched and analyzed, and effective solutions are proposed. The ad vantages of the system are analyzed and explained based on the comparison with traditional control scheme, Feasibility and economi-cal efficiency are affirmative for thermostatic valve configuration being replaced by conversion frequency cooling system, and it has opened up a practical and effective way for technical innovation of air compression field
Key words: conversion frequency cooling system; screw air compressor; frequency inverter; PID control
1
引信
目前,在各种工矿企业运行着大量喷油螺杆空压机,其中有部分为变频螺杆空压机,其主要特征是驱动压缩机的主电机通过变频器进行调速,实现恒定压力供气,而其中排气温度控制是通过温控阀分别控制流向油冷却器至机头和旁通短路直接回机头的不同流量比例的润滑油来实现的,随着空压机运行环境温度高低不一,工作负荷状
收稿日期:2014-03-08 50camprssoi
一压缩利投术
态变化频繁,排气温度波动较大,当排气温度过高时,减小旁通管道的流量,进而增加进人油冷却器管道流量,实现降低润滑油温;当排气温度过低时,增加旁通管道的流量,进而减少进入油冷却器管道流量,进而升高油温,自动控制进人机头的润滑油温度,防止过高或过低的排气温度,延长润滑油寿命,并确保安全。由于石蜡阀芯结构模式的温控阀本身技术性能限制,其调节行程和响应速度往往不尽人意,在寒冷的冬天,或当压缩机在低频状态下运行时,对于空压机特别是水冷
2014年04期(总第246期)器