耐腐蚀玻璃钢离心泵

“三方”牌S型耐腐蚀玻璃钢离心泵系列产品,是化工部及行业公认的著名品牌之一。其系列产品包括S型玻璃钢离心泵、SL型玻璃钢管道泵、SY型玻璃钢液下泵和正在形成生产能力的SLD型玻璃钢多级泵、SC型玻璃钢磁力泵形式以及与之相辅的玻璃钢SPB型喷射器,管道视镜,底阀,SKF型水环真空泵等产品。其产品群与管、阀产品一起,广泛应用于化工、石油、制药、农药、精化、化纤、环保、水处理等行业的防腐领域中。其产品具有高效、     

化工离心泵的节能

离心泵在化工流程中应用极广,能耗相当大,故离心泵的节能意义很大。由理论分析及实际调查表明:化工离心泵运转效率低是造成能量浪费的主要原因之一。离心泵的节能应从提高整机的运转效率出发,合理设计和使用离心泵。     

离心式化工流程泵设计技术进展综述

为给高效、高可靠性化工离心泵的研发提供技术参考,介绍了离心式化工流程泵的产品及相关理论研究的现状,总结了一些常见的离心泵的水力设计方法。阐述了化工流程泵可靠性设计的发展现状、分析方法,并列举了一些通过改进水力模型及结构来提高泵的可靠性的措施。国内外化工离心泵的最新研究进展表明,化工离心泵的三元流设计和可靠性分析技术已经开始在一定范围内应用,并逐步成为高效、高可靠性产品设计的重要手段。     

化工离心泵底座改进设计及研究

基于化工离心泵的设计标准,结合在实际的生产与装配中出现的问题分析,优化了化工离心泵底座的结构设计与生产工艺,保证了最终生产底座的精度,同时兼顾整体装配后的美观,优化后的底座更有利于整个化工离心泵底座的系列化设计。     

化工离心泵机械密封失效原因分析

本文主要针对化工离心泵在实际应用过程中经常出现的机械密封失效问题进行了深入探讨,对化工离心泵出现机械密封实效的具体表现形式及主要失效原因进行阐述,并在此基础上,从防腐蚀、摩擦、人为因素等多个方面有效解决化学离心泵机械失效的主要措施,为化工离心泵能够实现正常运转起到了积极的推动作用。     

化工离心泵选型

主要阐述了化工离心泵的选型特点,并与普通水泵在选型上做了比较,通过卧式化工离心泵与旋涡泵选型方法在化工领域的具体应用,为化工泵设备选型提供技术支持。     

离心泵泵效调节若干问题研究

离心泵广泛应用于化工生产中,提高离心泵的泵效有利于减少生产中的成本,并且能够提高经济效益。文章主要阐述了离心泵泵效低下的原因,并对提高离心泵工作效率的措施进行了探究。     

化工离心泵产品开发动向

综合分析了国内外化工用离心泵的开发方向；介绍了化工离心泵减少轴封泄漏的措施；阐述了无泄漏泵（磁力泵、屏蔽泵）的结构特点及其优缺点。     

小流量化工用离心泵的开发研究

介绍了新开发的小流量化工离心泵三个系列型谱、结构特点及其应用;着重叙述了低比转数叶轮的设计方法、试验研究,对进一步开发、应用小流量化工用离心泵具有重要指导意义。     

离心泵进口基于高效区宽度的优化及影响分析

化工离心泵常常会在偏离最优工况的条件下运行，结合“双碳”政策，化工离心泵在工况变化时依然处于高效运行显得尤为重要。因此，如何拓宽高效区宽度成为一个重要的问题。以一台六叶片离心泵作为研究对象，进行了数值模拟，将离心泵部分叶片进口处型线调整为螺旋型并分析了其对离心泵外特性的影响。结果表明：设计工况下，调整两枚叶片离心泵的外特性高于调整三枚叶片；周向相位变化将导致离心泵外特性变化；调整后，离心泵高效区变宽，小流量工况下叶轮效率显著提高。     

连续纤维增强玻璃钢球阀研究

介绍了由材料性能试验获取的连续玻璃纤维增强复合材料的力学性能,包括沿各个不同方向的拉伸、压缩、剪切、弯曲等性能参数,并依据这些性能参数,研究连续纤维增强玻璃钢球阀的设计要点,导出其详细设计公式。通过对材料组成及制备工艺进行改进,使得设计出的玻璃钢球阀较国内普通的玻璃钢球阀力学性能更为优秀。     

Tribological behaviour of glass fibre bundles reinforced epoxy gradient composites

Abstract

The short fibre bundles separated from the machining waste of a printed circuit board manufacturing plant were used in preparing functionally graded composites using polysulphide modified epoxy resin. Glass fibre bundles were thouroughly mixed with epoxy, which is getting polymerised with time and centrifugal force was applied to achieve graded dispersion of glass fibre bundles. The centrifugation time was varied to obtain different gradient profiles. Optical microstructures confirmed the graded dispersion of glass fibres bundles in the epoxy matrix. Increase in distance towards the centrifugation force direction increases the glass fibre concentration. Gradient characteristics in the composite have been observed in wear and friction measurements, which were conducted using a pin-on-disc machine. Worn surfaces of samples were analysed with the help of SEM. Both sliding (adhesive) and abrasive wear rates of glass fibre reinforced epoxy gradient composites reduced with increasing centrifugation time. Reduction in wear rate in glass fibre epoxy gradient composites has been attributed to the better interface bonding between epoxy coated fibre bundles and the epoxy matrix and hardening property of glass fibre. It has been found that capability to sustain pressure limit increased from 0·59 to 0·79 MPa on centrifuging the sample upto 2 min and reached to 1·19 MPa with increasing the centrifugation time to 30 min.     

氟塑料离心泵性能预测及实验对比分析

以氟塑料离心泵IHF150-125-250为研究对象,运用流场计算软件FLUENT,对2种不同叶片形式叶轮氟塑料离心泵分别进行内部流场的数值模拟,同时在多功能水泵试验台上进行实验测试,将得到的外特性模拟预测数据与实验数据分别对比分析。结果表明,数值模拟的方法可以较好地对泵性能起到预测作用,改进后的扭曲叶片叶轮的氟塑料离心泵的性能优于现有的直叶片叶轮氟塑料离心泵。     

低比转速化工离心泵的可靠性预测

在化工离心泵设计过程中对泵的性能和可靠度进行预测有利于保证泵在运行过程中的可靠性。为给离心泵的可靠性设计提供一种分析手段,以一台低比转速离心泵为对象,给出该泵的设计参数和结构、对水力性能进行数值预测和性能测试。将离心泵看作一个由各部件组成的串联系统,在相关经验或试验数据基础上结合模型泵的特点,分析单元可靠度进而得到零件的失效率,最终通过系统的可靠度计算得出离心泵的可靠度。该设计和分析方法相对于传统的机械设计方法更有利与提高泵的可靠性。     

An Automated Ultrasonic NDT System for In-Situ Inspection of Wind Turbine Blades

It is crucial to maintain wind turbine blades regularly, due to the high stress leading to defects or damage. Conventional methods require shipping the blades to a workshop for off-site inspection, which is extremely time-consuming and very costly. This work investigates the use of pulse-echo ultrasound to detect internal damages in wind turbine blades without the necessity to ship the blades off-site. A prototype 2D ultrasonic NDT （non-destructive testing） system has been developed and optimised for in-situ wind turbine blade inspection. The system is designed to be light weight so it can be easily carried by an inspector onto the wind turbine blade for in-situ inspection. It can be operated in 1D A-scan, 2D C-scan or 3D volume scan. A software system has been developed to control the automated scanning and show the damage areas in a 2D/3D map with different colours so that the inspector can easily identify the defective areas. Experiments on GFRP （glass fibre reinforced plastics） and wind turbine blades （made of GFRP） samples showed that internal defects can be detected. The main advantages of this system are fully automated 2D spatial scanning and the ability to alert the user to the damage of the inspected sample. It is intended to be used for in-situ inspection to save maintenance time and hence considered to be economically beneficial for the wind energy industry.     

General method for predicting the sand erosion rate of GFRP

Sand erosion behavior and wear mechanism of various types of glass fibre reinforced plastics (GFRP) were investigated. Erosion behavior of fibre reinforced plastics (FRP) changed from ductile manner to brittle one with increase of glass fibre content, and erosion rate was maximum at vertical impact for higher glass fibre content FRP. FRP showed higher resistance to erosion damage than resin matrix at low angle of attack, the contrary tendency can be observed at higher angle of attack. The importance of damage of glass fibre bundles accompany with surrounding resin and effect of orientation angle of fibres on erosion damage of FRP were pointed out. Based on these factors and applying similar equation of the rule of mixture for strength of FRP, prediction method for erosion rate was proposed.By using this method, erosion rates of all types of GFRP under various angles of attack and impacting velocity can be estimated by knowing only the rate of matrix resin.     

玻璃钢材料在便携式安检设备中的应用及展望

论文综合评述了玻璃钢材料的性能特点,采用玻璃钢材料代替传统金属材料,采用传统的手糊成型工艺方法制作了线扫描平板便携式安检设备的机箱。实际应用表明,玻璃钢材料质量更轻、强度更高,使用寿命更长,可设计性更强,加工工艺性较好,能完全满足便携式安检设备的性能需要,采用该材料后设备体积减少约20%、质量减少约50%,提高了产品的市场竞争力。     

Solid particle erosion of unidirectional fibre reinforced thermoplastic composites

In the present study, the solid particle erosion behaviour of neat PEEK matrix and unidirectional glass fibre (GF) and carbon fibre (CF) reinforced polyetheretherketone (PEEK) and polyetherketoneketone (PEKK) composites has been studied. The erosion experiments have been carried out by using silica sand particles (200 ± 50 μm) as an erodent. Steady state erosion rates of these composites have been evaluated at different impact angles and impact velocities. The neat PEEK exhibited peak erosion rate at 30° impingement angle whereas the composites exhibited a semi-ductile behaviour with peak erosion rate at 60° impact angle. The erosion rate of the glass fibre reinforced composites was higher than that of the carbon fibre reinforced composites. The results show that the fibre orientation has a significant influence on erosion rate only at lower impact angles. The erosion rate of the composites was higher when the particles impact perpendicular to the fibre direction than parallel to the fibres. The morphology of eroded surfaces was observed under scanning electron microscope and damage mechanisms were discussed.     

平板裂缝天线制造技术研究

介绍了平板裂缝天线制造技术的新进展,如高速切削加工技术、真空钎焊技术、碳纤维复合材料成型技术以及相关分析仿真技术等。     

Low velocity impact and axial loading response of hybrid fibre aluminium laminates

Journal of Mechanical Science and Technology - Fibre metal laminates (FMLs) are layered materials based on stacking arrangements of metals and fibre reinforced plastic (FRP) composite laminates....