查询词典 hydraulic pressure

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On the basis of introducing principle and typical equipments of hydro-forming deep drawing, the HDD has been divided into five typical kinds as follows: hydro-forming deep drawing without punch, deep drawing with fluid assisted blank-holder, deep drawing with hydraulic counter pressure, hydro-mechanical deep drawing, and internal high-pressure deep drawing.

在阐述板料液压拉深方法原理和分析国内外板料液压拉深典型装置的基础上，将板料液压拉深方法分为液压软凸模拉深、液压辅助压边拉深、对冲液压拉深、液压－机械拉深和内高压拉深等5种。

It has only been reported in a small number of trees (e.g., Sperry et al. 1994, Ewers et al. 2001). Diurnal refilling via root pressure has been reported in some crop species (Tyree et al. 1986, Stiller et al. 2003), but it is unclear whether trees employ root pressure for daily recovery of hydraulic conductivity.

举例来说， Sperry 等人 1994，大口水罐等人 2001 每日的再将注满经由根压力已经被在一些农作物种(Tyree 等人 1986，较静止的等人 2003)方面报告，但是它是不易了解的是否树雇用为水力导电率的每日恢复植根pe from prison 压力。

The high pressure jet grouting was used in the foundation for a Sewage Treatment Projict in Shanghai Fish Processing Factory, to reinforce it and as a surrounding protection structure of deep foundation, High pressure jet grouting is rarely used in large architectural projects and hydraulic structures.

上海鱼品厂污水处理工程地基采用高压喷射注浆法加固，並作为深基坑的围护结构，用于大面积建筑工程和水工构筑物的尚不多见。

Pointing to some problems such as easy defect of joint, big pushing to voltage of power net and frequent defects existed in hydraulic station control system of BF, the reforming included replacing pressure meter with electric joint by pressure transmitter with intellectual digital display, replacing alternating contactor by alternating frequency conversion technique and increasing relay control to 984PLC control has been done in Jigang.

针对高炉液压站控制系统存在的接点易损坏、对电网电压冲击大、故障频繁等问题，改造采用带智能数显表的压力变送器代替电接点压力表，应用交流变频技术代替交流接触器，并将继电器控制升级为984PLC控制。

The math model of the movement,flux and control system of position pump was established by analyzing its working principle,and its hydraulic system simulation model was established based on AMESim.The pressure and flux pulsation of the position pump was analyzed,and the pressure and flux was calculated by simulation when there are sign of wear for the position pump and system flux change.

分析了恒压力轴向柱塞泵的工作原理，推导并建立了液压泵压力流量和压力调节机构的数学模型，并在此基础上以AMESim工程软件为平台建立了轴向柱塞泵的仿真模型，分析了压力流量脉动状况并对液压泵在内部磨损和系统流量变化两种情况下的压力流量进行了仿真计算，对两种情况下泵的工作情况进行分析比较，为液压脉动抑制和故障分析提供了参考。

Engineering College, Air Force Engineering University, Xi'an Shaanxi 710038, ChinaAbstract: The math model of the movement, flux and control system of position pump was established by analyzing its working principle, and its hydraulic system simulation model was established based on AMESim. The pressure and flux pulsation of the position pump was analyzed, and the pressure and flux was calculated by simulation when there are sign of wear for the position pump and system flux change.

分析了恒压力轴向柱塞泵的工作原理，推导并建立了液压泵压力流量和压力调节机构的数学模型，并在此基础上以AMESim工程软件为平台建立了轴向柱塞泵的仿真模型，分析了压力流量脉动状况并对液压泵在内部磨损和系统流量变化两种情况下的压力流量进行了仿真计算，对两种情况下泵的工作情况进行分析比较，为液压脉动抑制和故障分析提供了参考。

Periodic fluid pulsation in aeroplane hydraulic piping could induce fluid-construction vibration and lead to fatigue damage. It is impossible to find the error sensor's optimization location because of the pressure standing wave, and the pulsation attenuation effect is not perfect when adopting pulsation attenuation at single point. For this reason, a distributed active control method of fluid pulsation was presented. To avoid stationary point in all aviation states, several fluid pulsation actuators and error pressure sensors were placed along the piping. The second fluid pulsation produced by actuators can counteract the primary pulsation brought by aviation piston pump and make the mean pulsation of whole piping minimum when adopting adaptive feed- forward control and the filtered-X least mean square algorithm.

针对飞机液压能源管路系统中的周期性流体脉动诱发流固耦合振动，导致管路疲劳损伤的问题，针对管路中存在压力驻波特性，在采用单点消振时寻找误差传感器最佳布局位置困难而引起脉动抑制效果不理想的缺点，提出了一种分布式流体脉动主动控制方法，即沿管路不同位置布置多个主动消振阀和误差压力传感器，在任意飞行阶段，避开压力驻波点，以误差压力传感器的脉动测量值为控制目标，采用一种针对周期脉动主动控制的自适应前馈控制法和多通道自适应滤波－X LMS算法，调整控制器参数，使主动消振器产生的次级脉动与管路中的初始脉动相互抵消，达到整个管路中的平均流体脉动最小的效果。

Refined into the present company main products: heating categories: thermostatic radiator valve, balance valve, self-acting differential pressure controller, self-traffic controllers, self-operated valves, electric control valve, to warm temperature controller, desuperheating decompression system; air conditioning products: indoor temperature controller, electric Two-, three-way valve, pressure bypass control systems, proportional-integral-type regulating valve and so on; treatment series of products: electronic water treatment device, filter backwashing , and condensed water recovery unit and other hydraulic control valves.

目前精成公司主要产品有：供暖类：散热器恒温阀、平衡阀、自力式压差控制器、自力式流量控制器、自力式温控阀、电动调节阀、地暖温控器、减温减压系统；空调类产品：室内恒温控制器、电动二通、三通阀、压差旁通控制系统、比例积分式调节阀等；水处理系列产品：电子水处理仪、反冲洗过滤器、冷凝水回收装置及其它水力控制阀门。

The reason is used to control the hydraulic oil pressure of compressed air pressure is too low.

原因是用于控制液压油压力的压缩空气压力太低。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。