共查询到20条相似文献,搜索用时 78 毫秒
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本文在硬支承动平衡机平面分离解算的通用模式基础上,进一步分析其误差来源,为评价硬支承动平衡精度指标提供了依据。 相似文献
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为满足动平衡测量与加工一体化的动平衡自动校正技术发展的需求,文中采用高性能的DSP芯片作为中心测控单元,实现了一个可单机或同数控加工系统联机应用的数字式动平衡测量系统.在对系统总体结构介绍的基础上,重点对一些关键技术进行了讨论,首先,针对硬支承方案,分析了测力支承机械振动系统振动特性并整定了硬支承设计的重要参数;其次,提出采用程控增益放大的方法实现信号的跟踪调理,提高了测量系统的精度.系统已得到了实际应用,结果表明系统具有可靠、高精度和使用方便等特点. 相似文献
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提出了一种基于双三次B样条插值对刚性转子动不平衡测试系统进行系统标定的方法,该方法可以避免和减少硬支承动平衡测量系统中由于忽略了惯性力和系统阻尼带来的测量误差,实现硬支承和软支承动平衡测量中系统的永久标定。在德国申克ST590平衡电测系统中采用0.5kg、1.6kg、5kg、16kg转子分别在180~1423r/min转速范围内进行标定实验,实验结果表明,该方法的标定结果与状态标定的标定结果具有同等的标定精度和测量精度。 相似文献
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动平衡测试技术方法浅析 总被引:7,自引:2,他引:7
阐述了硬支承和软支承两种动平衡机的平衡原理,简要分析了影响系数法、小波变换法和互相关法这三种不平衡量的提取算法,并介绍了目前常用的几种动平衡机的结构形式。 相似文献
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硬支承平衡机原理误差的消除及新型平衡机的构想 总被引:2,自引:0,他引:2
根据目前普遍使用的硬支承动平衡机存在的原理误差并且机械灵敏度较低的问题,对原理误差进行了简要分析,介绍了降低原理误差的各种措施,并提出了新一代动平衡机的设计构想. 相似文献
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周士炎 《试验技术与试验机》1995,35(1):3-7,11
本文重点讨论了校正面外悬的航空涡轮转子在配有微机化电测系统的硬支承动平衡机的环境下进行平衡的最佳方法-准静-偶分离平衡法,并介绍了在黎明发动机制造公司总装厂对外悬航空涡轮转子试用以用支承动载荷作为外悬转子动平衡检验唯一标准的初步实践情况。 相似文献
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任大力 《世界制造技术与装备市场》1996,(1)
英国AsquithButler公司为法国的GEC Alsthom公司开发了一种5轴CNC机床,用以加工法国TGV高速列车车厢的侧板和底盘零件。该机床可加工长23m,宽3.5m的大型工件。 机床为龙门式结构,两个独立的床身并列固定在混凝土基础上,龙门架沿床身运动,主轴箱沿横梁运动。主轴箱有两个各自作垂直行程的主轴。一个主轴最高转速为3000r/min,安置在一个两轴控制的装置内,可使机床具有5轴加工能力。另一个主轴是内装式电机主轴,它的转速可达12000r/min。 Asquith Butler公司在该机床上采用了由淬硬导轨和在其上运动的支承件组成的直线滚动导轨系统。在淬硬导轨上运动的龙门由循环的滚动件支承,选用的是IKONippon Thompson公司的支承件,该支承件在运动方向 相似文献
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环状液体平衡器的平衡理论及其应用分析 总被引:1,自引:0,他引:1
建立了环状液体平衡器的动力学模型,在此基础上对平衡器的自平衡机理进行了分析,并着重对环状液体平衡器的平衡液的等效质量作了深入分析,提出并研究了在滚筒洗衣机上应用环状液体平衡器的效果。最后指出应注意科学设计平衡器尺寸及确定平衡液质量,选择恰当的应用场合,才能发挥其独特的减振效能。 相似文献
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新型智能砂轮半自动平衡仪 总被引:2,自引:0,他引:2
介绍新研制成功的精密磨床砂轮半自动平衡仪。该仪器利用数字相敏检波技术提取砂轮的不平衡振动信号及最小二乘技术识别砂轮不平衡量;设计出友善的人机界面,用于提示、指导识别与平衡过程;仪器的绝大部分功能均由软件完成,成本低,可靠性高。试验表明仪器原理正确,平衡精度高。 相似文献
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研究了一种车轮平衡机的算法,目的在于使人们对车轮平衡机的工作原理有个深入细致的了解.这种科学理性的认识是对车轮平衡机性能及性价比评估的基本依据,更是对该设备进行调整、标定和故障分析、维护保养的理论依据. 相似文献
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The traditional ball-type automatic balancer, which consists of several balls moving along a fixed circular orbit, has been applied to different fields for rotational vibration reduction. Under proper working conditions, the balls will counter-balance the rotor by positing to appropriate locations. This particular equilibrium configuration is referred to as the perfect balancing configuration. The unbalance vibrations at steady state can be totally suppressed only if the perfect balancing configuration is stable. The stability of the perfect balancing configuration depends on the parameters of the system. To achieve perfect balancing, the system parameters must lie in the stable region of the perfect balancing configuration in the parameter space. An automatic balancer with a larger stable region of the perfect balancing configuration will be more robust. This paper provides a detailed analysis of a new design of auto-balancer, the ball-rod-spring balancer, which is aimed to increase the stable region of the perfect balancing configuration. A theoretical model of a rotor packed with a two-unit ball-rod-spring balancer is constructed. Closed form formulae of the equilibrium configurations are presented. The stability of each equilibrium configuration is investigated both analytically and numerically. Results of numerical analysis confirm that the stable region of the perfect balancing configuration of the new design is larger than that of the traditional fixed orbit balancer. 相似文献
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Chung-Hyo Jung Jin-Tak Kim Yun-Ho Choi 《Journal of Mechanical Science and Technology》2011,25(6):1465-1474
An automatic washing machine undergoes rotational unbalance due to unbalanced mass during the spinning process. A liquid balancer
is an assembly that plays a role in controlling this unbalance. In recent years, washing machines (drum and automatic types)
are becoming larger to handle large laundry items such as comforters. A large-sized washing machine generates a huge centrifugal
force in its high speed rotating drum. Thus, a specific vibration reduction technique is required. The design of a liquid
balancer has, to date, depended on conventional methods such as experiments and dynamic models. A dynamic model classifies
the behavior of liquid inside the balancer into three different patterns, and solutions can be obtained by approximating these
patterns as rigid bodies. This method, however, is limited to two-dimensional (2-D) analysis for simple geometry. In the present
study, a three dimensional (3-D) computational fluid dynamics (CFD) method is used to analyze flow characteristics inside
the liquid balancer for various design parameters. The main parameters include rotational speed, eccentricities of the center
of rotation, viscosity of the liquid, gravity orientation, surface tension, and the number of baffles. In particular, the
effects of these parameters on the hydraulic force (restoration force) of the liquid balancer are studied. 相似文献
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X-Y型天线座设计中摒弃了常用的加平衡重设计,采用弹簧平衡器来平衡部分天线不平衡力矩。介绍了弹簧平衡器的原理,结合实际工程给出了弹簧平衡器的设计方法、步骤。此方法设计的天线座体积小、重量轻,且天线驱动力矩的状况有明显改善。 相似文献
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Automatic balancing of flexible vertical rotors using a ball guided to move freely in a circular groove housed in the rotor disk is studied. The dynamic interaction between the balancing ball and the rotor is investigated using an undamped three-degrees-of-freedom system model in a rotating reference frame. The centrifugal force on the balancing-ball moves it to a relative rest position in the groove and thereby modifies the effective rotor unbalance. The stability of balancing ball position during the rotor whirling motion is analyzed and the conditions under which the unbalanced rotor vibration can be neutralized by the automatic balancer are identified. The stability results are presented graphically to facilitate an effective automatic balancer design. The results show that the automatic balancer can neutralize the unbalance whirling motion of the rotor, when operated at speeds higher than its critical speed. 相似文献