倪淮生

摘要：为了提高空气压缩机性能，本文通过一种改进水润滑改进后的离心式电动空压机进行实验测试，结果表明，改进后的空压机通过对电机磁钢处的密封设计，可以使搅水损耗相比轴承功耗小很多。在空载状况下，前轴和后轴的轴承工作良好，没有出现水膜失稳的情况。在带载状态下前轴承振动基本稳定，变化不大，后轴承在个别转速下有高频振动。整体振动较稳定，振动幅值较小。从空压机的工作特性可以看出，改进后的空压机压缩空气的质量流量及压力比随着转速升高而增大。涡壳和电机定子的温度都随转速而升高，但都远低于绕组的耐受温度。

Abstract： In order to improve the performance of the air compressor， this paper conducts experimental tests on an improved centrifugal electric air compressor with improved water lubrication. The results show that the improved air compressor can stir water by sealing the motor’s magnetic steel.  The loss is much smaller than the power consumption of the bearing.  Under no-load conditions， the bearings of the front and rear axles worked well， and there was no water film instability.  In the loaded state， the front bearing vibration is basically stable with little change， and the rear bearing has high frequency vibration at individual speeds.  The overall vibration is relatively stable， and the vibration amplitude is small.  It can be seen from the working characteristics of the air compressor that the mass flow rate and pressure ratio of the compressed air of the improved air compressor increase with the increase in speed.  The temperature of the volute and the stator of the motor both increase with the speed， but they are far lower than the withstand temperature of the windings.

關键词：离心式电动空气压缩机;实验测试;高频振动;质量流量

Key words： centrifugal electric air compressor;experimental test;high-frequency vibration;mass flow

中图分类号：U469.72                                    文献标识码：A                                  文章编号：1674-957X（2021）15-0089-04

0  引言

空气压缩机是气源装置中的主体，它是将原动机（通常是电动机）的机械能转换成气体压力能的装置，是压缩空气的气压发生装置，有着吹气产气、制冷与分离、驱动动力、合成及聚合、气体输送等作用，广泛应用于电子、汽车、钢铁等生产生活的各个领域。

空气压缩机的种类繁多，按照其工作原理可分为往复活塞式、旋转叶片或旋转螺杆式和电动离心式。离心式空压机相比于其他种类的空压机气量大，结构简单紧凑，重量轻，机组尺寸小，占地面积小。此外还有着运转平衡，操作可靠，运转率高，摩擦件少，因之备件需用量少，维护费用及人员少的优点，因此得到了广泛的运用[1-2]。……