转子体端面粘涂尼龙与钢配油盘摩擦副的分析与研究

本文介绍了通轴柱塞油泵油马达转子体端面粘涂尼龙的工艺,并对粘涂尼龙的转子体端面与钢配油盘摩擦副的摩擦机理进行了试验分析和研究,为提高油泵和油马达寿命、降低成本和噪声开辟了新的途径。     

ZHS-H065型长型油针体中孔座面压力室钻镗铰十工位组合机床

在以英明领袖华主席为首的党中央一举粉碎“四人帮”,全国人民贯彻执行“抓纲治国”战略决策,一年取得了初见成效的大好形势下,一九七八年一月六日至十日,在常州市召开了油泵油嘴三付偶件生产所需要的组合机床出厂鉴定会。会上对由常州机床厂、大连组合机床研究所和湖北油泵油嘴厂共同研制的ZHS—H063型加工长型油针体定位孔、进油孔五工位组合机床,ZHS—H065长型油针体中孔、座面、压力室钻、镗、铰十工位组合机床及ZHS—H068Ⅰ号泵柱塞套钻、铣八工位组合机床等三种机床进行了全面的技术鉴定。鉴     

炼化原油泵的铸造工艺设计与生产

采用三维软件对炼化原油泵体零件进行了实体造型,铸造工艺设计过程中主要用模数法进行了冒口设计和计算,并采用铸造模拟软件进行充型、凝固模拟分析,确认了浇口、冒口的尺寸和具体位置,从而保证了铸造工艺设计的正确性,得到符合质量要求的铸造工艺。同时加强铸造生产各工序环节的控制,最终获得了高质量的炼化原油泵体铸件。     

蓄能器在组合机床中的应用

蓄能器作为辅助能源愈来愈广泛地被用在组合机床及其自动线的液压控制系统中。本文介绍如何选择蓄能器的容积、蓄能器的充气压力、油泵的供油压力以及油泵的流量等。图5幅,表1个。     

铝合金泵体抽芯机构的设计

铝合金泵体抽芯机构的设计巢湖市安徽油泵油嘴厂（２３８０００）高延圣１铸造工艺概述在柴油机油泵油嘴行业中，铝合金多缸喷油泵体常采用金属型铸造成形。６缸ＡＤＳ喷油泵体（图１）原为仿国外ＡＤ泵的改进设计，整体铝合金结构，体积小，刚性好。它的窗口Ｇ下部设计了...     

电镀人造金刚石珩磨油石

文中介绍了电镀人造金刚石珩磨油石试验情况,结果表明,该产品适于油泵部件——滚轮体的粗珩。     

液压元件计算机辅助测试系统的开发与应用

本文结合实例概述了液压元件计算机辅助测试（ＣＡＴ）系统的基本构成和基本原理，然后介绍了液压油泵ＣＡＴ系统的软件编制和应用。     

油泵体加工系列化组合机床

油泵体加工系列化组合机床吉林省汽车工程技术发展公司邓定防主题词：油泵体，加工，组合机床近年来，我国汽车、农机用发动机（汽油机和柴油机）产量迅猛增加，品种也不断增多，作为其配套件之一的机油润滑泵的产量和品种也随之增加。一些大型主机厂如一汽、二汽都有自己...     

《介绍法国BM160立式车床平衡油缸》

本刊一九八○年第五期曾刊登了上海油泵油咀厂陈梅青同志介绍的《一种平衡油缸》,这种油缸结构简单,体积小,不需要油泵供给压力油,有一定的实用价值。但由于加工困难,仅适合一些立置部件移动距离较短的设备。因为立置部件如果要移动较长距离,油缸体和活塞杆也要相应加长,从加工工艺角度来考虑,油缸体如直径不大,长度又长,其内孔的表面     

柱塞式液压油泵传动杆断裂分析

柱塞式液压油泵的传动杆在飞机进行地面试车时发生断裂。对柱塞式液压油泵的传动杆断口进行了宏观观察和金相组织分析,并对传动杆的金相组织、硬度、化学成分进行了检测。结果表明：传动杆材质符合要求,其金相组织为索氏体,传动杆断裂性质为过载断裂,主要原因是由于转子端面柱塞油孔口同分油盘槽孔之间定位销介入,使传动杆旋转受阻,迫使传动杆扭断。     

一种小型位置伺服器的设计

针对转速范围较小、驱动力矩不太大的负载,设计了一种实用的小型位置伺服器,并介绍了实现电路及控制算法     

双金属温度补偿片的精整加工技术

航空用双金属温度补偿片要求能够可靠地起到温度补偿作用,对内、外形的形位公差及断面粗糙度要求较高,从分析双金属温度补偿片结构特点和冲压工艺性入手,结合生产需求,提出了小余量切削的精整加工工艺方案。详细解析了精整工艺参数设计方法,并对倒装及正装复合精整模具结构进行优劣对比分析,最终选用正装式复合精整模具结构,其能够在足够小的余量切削条件下一次完成整修加工,保证断面粗糙度要求;同时,巧妙地将3面定位改为6点定位,解决了废料挤压在定位板与工件之间而造成的操作困难以及定位板变形问题。生产实践证明,采用该工艺方法及模具结构取得的效果良好,不仅大大提高了生产效率,产品合格率也得到显著提升。     

穿孔顶杆联接与调整定位的改进

简要地介绍了穿孔顶杆联接与调整定位的改进措施及改进效果。改进后顶杆的调整定位操作容易，模具消耗低，设备有效作业率提高。     

智能电位测试桩防盗定位报警功能应用研究

随着阴极保护智能无线远程监测设备在油气管道上的应用越来越普遍,针对电位测试桩的第三方施工破坏以及人为损坏和被盗现象日益突出,智能阴极保护测试桩一旦被盗,或者在人为损坏时不能及时发现和定位,不仅对公司财产造成重大损失,也极大的增加了管道运行安全隐患。本文提供了一种用于智能电位测试桩的防盗定位报警系统,该系统能够及时发现人为触动和损坏,当设备有震动或位移时都能马上触发报警,并通过卫星信号无线远程发送同时启动定位跟踪功能,从而有效解决设备的防盗定位和人为破坏的问题。     

基于声发射的扫地机器人外壳碰撞点定位研究

扫地机器人领域的核心问题是定位问题,对扫地机器人行进过程中的碰撞位置进行有效定位是提高清扫效率的关键。声发射作为一种新型的无损检测技术,它的信号特性让其能在各种材料环境下进行定位实验。基于声发射技术的时差定位系统对于碰撞信号这种突发型信号有较好的捕捉定位能力,采用声发射时差法研究扫地机器人外壳在发生碰撞时的对应位置并进行定位误差分析。结果表明,声发射时差定位法能简单且快速地对碰撞点进行有效定位,利用声发射时差定位计算出的坐标与实际碰撞点坐标的误差最大值为8.45 mm,最小值为0.7 mm。研究结果可为实验研究和工程中声发射事件的精确定位提供重要参考。     

High Precision Positioning with Ferrofluids as an Active Medium

Ferrofluids are magnetically controllable fluids which can be used as an active medium in high precision positioning systems. The capability of ferrofluids for being fixed with an applied external magnetic field and their magnetorheological behavior are main properties for technical applications. Beside that, amplifying the magnetic force acting on the surface of a paramagnetic actor which levitates in a ferrofluid can be used for the high precision positioning of objects. In this paper different types of magnetofluidic positioning systems are described and the influences on the velocity of positioning and on the accuracy of positioning are discussed.     

Ultra precision positioning system for servo motor–piezo actuator using the dual servo loop and digital filter implementation

The ultra precision positioning technique has become one of the important parts in the development of precision machines. For positioning systems having a long stroke with ultra precision, a combined system including a global stage (coarse stage) and a micro stage (fine stage) is designed in this paper. A ball screw based servo motor is used as the global stage and a piezo actuator as the micro stage, in which some design parameters are analysed. To improve positional accuracy and remove the noise components of motion, the digital Chebyshev filter has been designed and implemented. The implemented digital filter has been found to improve accuracy by as much as three times. Positional accuracy has been readily achieved within 10 nm over the typical 200 mm stroke, and therefore this technique can be applied to develop high precision semiconductor equipment such as lithography steppers and probers.     

A rapid and accurate positioning method with linear deceleration in servo system

The positioning accuracy and positioning time of CNC system have recently been the main performance criteria for industrial applications. The acceleration/deceleration modes, especially deceleration mode, have an important effect on them. The linear deceleration mode is a commonly used deceleration mode. In conventional linear deceleration mode, there is a positioning stage at low speed for a long time after decelerating to ensure the positioning accuracy, because of the “dead zone” and the deceleration point error. In this paper, firstly, some problems in the conventional linear deceleration algorithm are analyzed. Then an improved linear acceleration/deceleration is introduced. In this algorithm, the deceleration point is predicted exactly, and then the deceleration point error is compensated for at higher feedrates. Furthermore, a higher resultant maximum acceleration than that in the conventional scheme is selected to shorten the acceleration/deceleration time. Thus, the positioning stage in conventional scheme is almost cancelled. Compared with that of conventional linear acceleration and deceleration algorithm, the system performance has been significantly improved. Finally, it is confirmed by many simulations and experiments.     

高速运动平台的快速精密定位控制

针对高速运动平台到位阶段的惯性振动造成的运动平台调节时间长、定位精度差等问题,提出了一种结合速度-加速度前馈控制、增益调度PID控制及扰动观测器(DOB)的复合控制方法。其中速度-加速度前馈用于实现平台的高加速运动特性;增益调度PID控制可以有效改善平台定位阶段由于非线性摩擦力对平台定位性能的影响,使平台的跟踪误差快速衰减到设定的定位精度范围内;扰动观测器用于对运动过程中的内外部扰动进行抑制。通过实验验证,该复合控制方法在保证定位精度的前提下可有效减小高速运动平台到位阶段的惯性振动,并且减小运动平台的调节时间,提高高速运动平台的定位性能。     

Modified algorithm of combined GPS/GLONASS precise point positioning for applications in open-pit mines

A modified algorithm of combined GPS/GLONASS precise point positioning (GG-PPP) was developed by decreasing the number of unknowns to be estimated so that accurate position solutions can be achieved in the case of less number of visible satellites. The system time difference between GPS and GLONASS (STDGG) and zenith tropospheric delay (ZTD) values were firstly estimated in an open sky condition using the traditional GG-PPP algorithm. Then, they were used as a priori known values in the modified algorithm instead of estimating them as unknowns. The proposed algorithm was tested using observations collected at BJFS station in a simulated open-pit mine environment. The results show that the position filter converges much faster to a stable value in all three coordinate components using the modified algorithm than using the traditional algorithm. The modified algorithm achieves higher positioning accuracy as well. The accuracy improvement in the horizontal direction and vertical direction reaches 69% and 95% at a satellite elevation mask angle of 50°, respectively.