压缩机

WANG Zhi-yi, CHEN S, YANG C HSchool of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou 310018, ChinaAbstract The cross defrosting cycle was presented in which one air side heat exchanger defrosts by switching over the corresponding four-way valve and the others operate normally.

摘 要：采用四通换向阀换向逆循环除霜，风冷热泵机组系统压力波动剧烈而产生比较大的机械冲击，频繁启动压缩机，影响室内的舒适性与压缩机的寿命，针对逆循环除霜的缺陷，提出了交叉除霜循环的原理和过程。

The compressor works continuously to maintain the inside temperature, and the heat it ejects from the back of the fridge offsets the cold at the front.

冰箱的压缩机必须持续运转，以保持里面的温度，压缩机从冰箱后面排出热气，与冰箱前面出来的冷气相互抵消。

But it is difficult that improve the component because of the limits of the technology level, meanwhile it is not easy to reduce the condensing temperature or increase the evaporating temperature owning to the operation condition.The purpose of this paper is to study improvement of the compressor by meliorating refrigeration circulatory system.

由于压缩机的结构受到设计、工艺水平的限制，要通过结构改进实现节能难度极大；而压缩机的使用工况受到环境和用途的限制，通过改变工况实现节能也不易实现。

Under consideration of these problems and traditional supercharging equipment and methods in the world,this paper discussed and analyzed the technical procedures of compressor application in the gas gathering stations,calculated and predicted such main working parameters .

针对靖边气田压力递减快、部分井已经采取间歇生产方式而必须进行低压气井增压的问题，借鉴目前国内外气田增压常用的设备及方法，结合靖边气田的工艺实际，探讨分析了压缩机在该气田集气站应用的工艺流程，计算预测了气田增压开采期内的压缩机进、出口压力等主要工作参数。

Under consideration of these problems and traditional supercharging equipment and methods in the world,this paper discussed and analyzed the technical procedures of compressor application in the gas gathering station s,calculated and predicted such main working parameters .

针对靖边气田压力递减快、部分井已经采取间歇生产方式而必须进行低压气井增压的问题，借鉴目前国内外气田增压常用的设备及方法，结合靖边气田的工艺实际，探讨分析了压缩机在该气田集气站应用的工艺流程，计算预测了气田增压开采期内的压缩机进、出口压力等主要工作参数。

The motor provides the power to drive all of the hydraulic functions of the drill and the air compressor which provides the large volume flow of com-pressed air needed for removal of drilling debris from the blast-hole.

该电动机提供动力，驱动爆破钻和空气压缩机的所有液压功能，空气压缩机提供除去由钻孔里带出的钻进碎屑所需要的大容量压缩空气流。

This test bench can be used for some relative performance test of motor vehicle air compressor.

车用空气压缩机性能试验台是用来测试车用空气压缩机有关性能的试验检测设备。

This causes the blade arrangements to resemble to an axial-flow compressor, with a stator row in front of the rotor.

这引起扇叶的排列来类比一台轴向流动的压缩机，在压缩机转子前面有一个定子排。

The Circulation-hydrogenation Compressor Model BLC-305/A is an important equipment with Hydrogenation devices, which is imported by Lanzhou Petrochemical Company Refinery. Due to high-speed rolling periodically, the spare parts of this compressor, to a varying extent, show a lot of signs of wear and tear. Especially, the axle sleeve of the rotor axle of the compressor is so worn to the greatest degree that its work efficiency decreases by a big margin. Machinery Factory of Lanzhou Petroleum Processing and Chemical Complex has undertaken this task to repair the rotor.

BCL—305/A型循环加氢压缩机是兰州石化炼油厂从国外引进的一台用于加氢装置的重要设备，该设备经长周期的高速运转，零部件均有不同程度的磨损，特别是压缩机转子轴上的轴套磨损程度最大，使整机效率大幅度下降，兰炼机械厂承担了这项转子修复任务。

A half-Keystone cross-section top- ring with improved carbon scavenging abilities is used, and the groove for the top ring is made more durable with the adoption of a cooled ring carrier that increases the groove's cooling capability.

当与对压缩机的一侧，从而降低了刀片和之间的压缩机房屋清拆封严相结合，提供卓越的涡轮增压器，这些反应几乎所有的发动机转速。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。