节流

A new infinite gas-lubiicated journal bearing with active controlled restrictor is proposed in order to remedy the defects of several existing infinite stiffness at abroad in construction, manufacture and adjusting, which combining surface-restriction with active controlled restriction, make the static and dynamic effect both better.

针对目前国外几种无穷静刚度气体润滑轴承结构复杂、制造难度大、调整困难的不足，本文提出了一种主动控制节流无穷静刚度气体润滑轴承，将表面节流与主动控制节流相结合，使轴承动、静压效果同时获得较好的发挥；利用浅腔及锯齿形多槽结构产生较强的楔形动压效应，提高轴承的静态和动态性能；利用主动控制节流器对轴承进行压力反馈主动控制，提高轴承的承载力、刚度，并在一定载荷范围内，使轴承刚度为无穷大。

Our company besides produces the above standard throttling gear, but also produces the present domestic ordinary application each kind of special throttle, like wing anemography installment, ring-like throttle type flowmeter, double repeated passage hamlet anemography installment, 1/4 round spray nozzle, segment of orifice, dual orifices, Inner Tibet orifice, fast tube Flow sensor, jack-in low damaged due to pressing flowmeter, against wall wind pressure thief and so on 30 many kinds of varieties, 1000 many kinds of specifications, caliber from DN10-3000mm, pressure from PN0.01-32MPa, temperature from negative 260℃- 550℃.

我公司除生产上述标准节流装置外，还生产目前国内普通应用的各种特殊的节流件，如机翼型测风装置、环状节流式流量计、双重文丘里测风装置、1/4圆喷嘴、圆缺孔板、双重孔板、内藏孔板、均速管流量传感器、插入式低压损流量计、防墙风压取样器等30多种品种，1000多种规格，管径从DN10-3000mm，压力从PN0.01-32MPa，温度从负260℃-正550℃。

To solve this problem,this paper introduced a kind of double- throttling choke,and also built up its designing model.

安装一个节流油嘴存在的最大弊端是节流前后压差很大，造成节流油嘴密封部件很容易失效，这就是目前井下节流仅在浅井中得到广泛应用，而在中深井中应用受到限制的原因之一。

This paper conducts a detailed analysis and comparison of thermodynamic performance of refrigeration cycles using mixed refrigerant s and single compressor with finite low temperature heat reservoir.

通过深入分析和比较各种单级压缩混合工质节流制冷循环在低温热源为有限大热源时的热力学性能，揭示了不同循环型式之间的内在热力学关系，阐明了该类节流制冷机能够实现深度制冷的内在原因是利用了制冷机的内部热交换来减少节流制冷机所固有的节流过程的不可逆损失，并用实验进行了验证。

This paper analyzes the steady-state characteristic of the two main components of the water hydraulic proportional throttle valve including slide valve and proportional solenoid, and analyzes the whole valve's steady-state characteristic also.

论文分析了水压比例节流阀的两个主要组成部分––––节流滑阀和比例电磁铁的稳态特性，并对水压比例节流阀整体的稳态特性进行了分析。

In this paper ,to overcome the shortcomings in 3MK133 Groove Grinder's hybrid spindle system that the shallow slots of the throttler are easy to be blocked and difficult to be disassembled to clean,we use the throttler which is put on the big-side surface of the conical bearing to replace the traditional throttler, change gap throttling to capillary throttling, and adjust the taper of the conical bearing , oil return way , seals and sealed mode.

针对 3MK133沟道磨床动静压主轴系统中，节流器浅沟容易堵塞及拆卸清洗不便等缺陷，提出采用端置式节流器替代原有的内置式浅沟节流器，变间隙节流为毛细管节流，并相应调整了主轴系统中圆锥轴承的锥度、回油通路、密封装置及密封方式。

Develop throttle using in wellbore and compound equipment on ground and constitute technique guide line on the base of theoretic research. Applying test had been carry out in 12 wells of Chuanyu gas field and 5 wells of Changqing gas field. The test results prove that throttle in wellbore have the advantages of reasonable design, easy installation and fishing. So we can get the conclusion that throttling in wellborn has great applying foreground.

在理论研究的基础上研制了井下节流器和地面配套装置、制定了节流工具的技术指标、适用范围，在川渝气田的12口井和长庆气田5口井上进行了应用试验，证明井下节流器工具设计合理，操作容易，座放和打捞都很可靠，井下节流工艺技术具有很好的应用前景和推广价值。

Downhole throttling technology is to adjust downhole pressure through installing the throttle valve in an appropriate position on the tube. The gas flowing through the throttle valve is heated up by the geotherm and the conditions of gas hydrate formation are changed, so as to effectively prevent gas hydrate formation, decrease transportation pipeline pressure, eliminate attemperator, and reduce the cost of gas production.

井下节流技术将井下节流器置于油管某一适当位置来实现井筒节流降压，并充分利用地热对油管内流体加热，使节流后气流温度高于节流后压力条件下的水合物形成初始温度，从而达到降低地面管线压力，取消地面加热保温装置、降低气井开采成本的目的。

Throttle Design accord with SY/ T5127-2002, API Spec 6A sum API Spec 16C request, Points structural form Can divide into Can mode throttle and Stationary type throttle, Fixes throttle valve casing and Can transfer throttle valve casing Can exchange.

节流阀JLK、JLG系列）的设计符合SY/T5127-2002、API Spec 6A和API Spec 16C要求，按结构形式可分为可调式节流阀和固定式节流阀，固定节流阀体与可调节流阀体可以互换。

As shown in Figure 11-25, when the airflow from a time of entry, one-way valve is on the top of the seat, the air can only flow from the throttle port of export 2, throttle valve throttling traffic is limited by the size of the mouth, adjustment screw can be adjusted throttle area.

如图11-25所示，当气流从1口进入时，单向阀被顶在阀座上，空气只能从节流口流向出口2，流量被节流阀节流口的大小所限制，调节螺钉可以调节节流面积。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。