Usage: can be used at room temperature and temperature-resistant sediment, under conditions of cavitation, such as welding parts, such as mud pump, screw propeller, such as surface welding.
用途：可用于常温及中温耐泥砂、汽蚀等条件下的零件堆焊，如泥浆泵、螺旋推进器等表面堆焊。
The schemes to mend and improve affinity law and velocity coefficient method of centrifugal pump were analyzed, and the traditional design method was improved through three aspects as follows: 1 design on database of hydraulic model with excellent cavitation characteristic; 2 design on the performance curve of pump without hump; 3 design on non-overload pump.
分析介绍了相似换算法和速度系数法提高和改进的设计方案，重点提出了三个方面的设计内容：一是高汽蚀性能水力模型库的设计；二是性能曲线无驼峰的设计新方法；三是无过载设计新方法。
Oil recovery; jet pump; cavitation erosion; test
石油开采；喷射泵；气蚀；试验
Keywords oil recovery; jet pump; cavitation erosion; test
石油开采；喷射泵；气蚀；试验
The low pressure area of blade suction surfaces accords with the cavitation region. The downstream backflows are obvious and a low presure band along the blade working surface outer edge is shaped because of the radial interspace between the impeller and pump body. At last the variable-distribution of design parameters is studied.
研究还发现，叶片正面和背面的速度、压力分布有着明显的规律，背面的低压区和汽蚀区域相吻合；由于径向间隙的存在，叶片正面靠近轮缘处形成了狭长的带状低压区，叶片轮缘面的速度分布清楚的显示了间隙处的回流。
Variable-pitch inducers can be mounted in front of impeller inlet to improve the anti-cavitation properties of centrifugal pump. The inducer is designed with variable-pitch structure, with smaller inlet blade angle to obtain smaller import flow coefficient, and with greater outlet blade angle to generate enough head to meet the requirements of cavitation in the inducer and the inlet pressure performance in centrifugal impeller.
为了提高离心泵的抗汽蚀性能，在离心泵叶轮入口处配置变螺距诱导轮，诱导轮设计为变螺距结构，以较小的叶片入口角获得较小的进口流量系数，以较大的叶片出口角产生足够的扬程，满足诱导轮本身的汽蚀性能要求以及离心叶轮入口压力性能的要求。
At the same time, the car water pump is prone to suffer from cavitation erosion at the entrance of the water pump. So installing a low-pressure radiator cap is usually a useful help.
气蚀是汽车水泵的另一个问题，一般在水泵的进水侧会出现腐蚀，所以通常都安装一个低压散热器盖。
On this basis, this paper discusses the pump cavitation curve fitting method, in order to improve the accuracy of curve fitting, pump cavitation presents a piecewise polynomial curve fitting method.
本文在此基础上，探讨了水泵汽蚀曲线拟合的方法，为了提高拟合曲线的精度，提出了一种泵汽蚀曲线分段多项式拟合的方法。
The experiment shows: With the same pump pressure, the capability of cavitation water jets produced by wenqiuli nozlle is stronger than common water jets.
实验研究表明，在相同泵压时，文丘里型空化喷嘴产生的空化射流比普通收缩喷嘴具有更强的冲蚀能力，对砂岩的深度冲蚀能力平均是普通射流的2倍；质量冲蚀能力平均是普通射流的7倍；切缝直径是普通射流的2.3倍。
The pressure distribution in the clearances of cylinder-type gap seal, labyrinth-type seal, and inverse-spiral seal as well as the variation patterns of leakage through these clearances are investigated by simulating test in this paper for reducing the wear and cavitation damage of runner sealing ring of water pump and francis turbine.
本文针对水泵叶轮、混流式水轮机转轮止漏密封的磨损和汽蚀破坏情况，对圆柱面间隙式密封、迷宫式密封和反螺旋式密封间隙的压力分布及其泄漏量变化规律进行了模拟试验研究。
For a long time, the pump cavitation has been regarding as a difficult problem to be resolved.
长期以来，泵汽蚀现象被认为是一个不易解决的问题。
This method is more suitable for pump cavitation performance curve fitting.
该方法较适合于泵汽蚀性能曲线的拟合。
Piercement of drilling pump cold cyclinder is a serious problem existed in field application. Piercement is caused by cavitation erosion.
钻井泵冷缸刺漏是钻井泵在现场使用中存在的一个较严重的问题。
Then, the method to estimate cavitation erosion characteristic of high pressure piston plunger pump by analyzing impingement angle on outlet of throttling groove is put forward. That is, to hold the impingement angle range of 30°～60°as appraisal criterion of cavitation erosion characteristic on high pressure hydraulic plunger pump.4 The throttling characteristic of hydraulic control valve is studied by CFD calculation and experiment.
最后，提出了一个通过分析节流槽出口处的射流方向来评价高压轴向柱塞空蚀特性的空蚀评价方法，即将节流槽出口的射流角范围30°～60°作为评价高压轴向柱塞泵空蚀特性的标准。4对液压控制阀的节流特性进行了CFD数值计算和试验研究。
Localized within the pump cavitation bubble debacle caused by the excitation produced by slow, while the local oscillator pump more.
对泵内局部汽蚀引起的汽泡溃裂所产生的激振反应迟钝，同时，泵上振源较多。
The merits of their performance, also on behalf of pump performance of the merits of the anti-clogging sewage pump performance and efficiency of the high and low, and cavitation performance, anti-abrasion performance of the main lobe pump and pressure by the two major components to ensure the water chamber.
其性能的优劣，也就代表泵性能的优劣，污水泵的抗堵塞性能，效率的高低，以及汽蚀性能，抗磨蚀性能主要是由叶泵和压水室两大部件来保证。
Application Cavitation, liquid hammer and pressure peak may occur in hydraulic systems with changes in flow velocity, e. g. fast closing of a valve or pump starts and stops.
应用 空化，液体铁锤和压力顶峰可能用在流动速度方面的变化在液压系统里发生，例如一阀门或者泵的快关闭起停。
The internal factors of the pump valve leakage, i. e. the machining process and material quality, are analyzed. And the external factors, such as liquid hammer, cavitation, sanding and corrosion, are discussed.
为此，分析了泵阀刺漏的内在影响因素，即泵阀加工工艺技术和材质，并结合油田实际，分析了液击、气蚀、出砂和腐蚀对泵阀刺漏的外在影响因素，阐明了这些因素的影响机理。
The causes of cavitation in the black liquor forced circulating pump in a native paper mill are found through analysis and calculation.
通过分析、计算找出某造纸厂碱回收分厂黑液强制循环泵产生汽蚀的原因。
In the article, the installation condition of pump without air-lock and cavitation are given.
对火车卸槽、码头卸油等常用工况进行了计算，给出了无气阻、无汽蚀时泵的安装条件，为泵的选用与吸入装置的设计提供了方便。