查询词典 ball bearing

The main products include deep groove ball bearing, variation core roller bearing, cylinder roller bearing, british system bearing, variation core ball bearing, double row deep groove ball bearing, pillow block bearing, corner touch bearing, trust roller bearing, tapered roller bearing, and spherical roller bearing.

主营产品包括：深沟球轴承、调心滚珠轴承、圆柱滚珠轴承、英制轴承、调心球轴承、双列深沟球轴承、座架、角接触轴承、推力球轴承、圆锥滚子轴承和球面滚珠轴承。

The effect of tribology factors on bearing vibration is studied experimentally. AR model and WPT are used to processing the normal arid abnormal signals. The results are as follows:1. The vibration of ball bearings is caused by the tribology action of contact pairs of ball and ring races and has the essential of tribo-dynamics. Any factors affecting the tribology characteristics of contact pairs will affect vibration and noise of bearings consequently.2. Vibration characteristics of bearing keep almostly unchanged with the increasing of axial load expecting the increasing of nature frequencies. When radial load increasing with axial load unchanged, nature frequencies keep unchanged but some new vibration peaks appears in the spectrum.3. Vibration amplitudes are damped and nature frequency are enhanced with sufficient lubrication. Vibration and noise of bearings increase obviously and roar can happen and the contact surfaces scratch slightly under insufficient and unclean lubrication state. Bearing will be disabled in a few minutes without any lubrication.4. Bearing vibration is unstable under low speed. With the speed increasing, the vibration become stable and natural frequencies increase slightly but the amplitudes increase apparently.5. Bearing vibration can be excited only by some harmonics ofwaviness without lubrication and by all harmonics with lubrication based on the theoretical analysis.6. The nature frequencies of ball bearings decrease with the increasing sizes. When international clearance increasing, nature frequencies decrease in radial and increase in axial and angular and the amplitudes increase in radial and decrease in axial and angular. When the number of balls increasing, nature frequencies increase and amplitudes decrease. When the pitch diameter increasing, axial nature frequency increase and others nearly keep no change. When outer race groove curvature radius increasing, nature frequencies increase in radial and decrease in axial and angular and amplitudes keep no change in radial and increase in axial and angular. When inner race groove curvature radius increasing, nature frequencies decrease and amplitudes increase.7. The distortion in amplitude and frequency components of bearing vibration signals picked up by the present probe measurement method is founded and right conclusions cannot be achieved by the signals. When accelerometer is rigidly screwed with steel stud onto a flat outer surface of a ball bearing, vibration signal can be got without distortion and the reliability of research on bearing vibration is assured.8. AR model is suitable for large samples of bearing vibration signals, square root of length of samples can be used as the upper limitation of order determination and the FPE order selection criterion is effective. Many advantages of AR spectrum are founded over the classical based on FFT.9. Time-Frequency analysis is necessary for abnormal noise of ball bearings. WPT overcomes the principle shortcomings of STFT and proved to be a best tool to process the abnormal signals.

理论分析和试验研究表明： 1球轴承振动是钢球—滚道接触副中的各种摩擦学作用引起的，具有摩擦动力学的本质，任何对接触副的摩擦学特性有影响的因素都将对球轴承的振动和噪声特性产生影响； 2中心轴向载荷作用下，载荷增大使球轴承的固有振动频率升高，载荷越大同样的载荷增幅引起的频率升幅减小，足够大的中心轴向载荷作用下载荷的变化对球轴承振动的频率特性不会产生明显的影响； 3轴向和径向联合载荷作用下，径向载荷不大时球轴承振动的固有频率基本不变，但是可能引起变刚度激励的非线性振动，出现新的频峰，过大的径向载荷将使部分钢球脱离接触，使球轴承的振动和噪声呈现不稳定状态； 4润滑对球轴承的振动和噪声特性有重要的影响，良好的润滑对振动有明显的抑制作用，润滑不充分时，振动和噪声的水平会有明显增高，一定条件下还会激发接触副中的谐振，发出啸声，造成接触表面的伤害，无润滑干接触时，短时的运转就会损伤接触副表面，使振动和噪声迅速增大，并随时可能引发严重的磨损和卡滞失效；接触副润滑良好时，油膜的"刚化效应"使球轴承振动的固有频率有所提高，润滑剂中含有弥散性污浊时，振动的幅度总体升高，但弥散性污浊不会改变球轴承振动的频率特性；浙江大学博士学位论文：球轴承振动的研究 5低速时，球轴承振动的基本特征呈现不稳定状态，随着转速的提高，球轴承振动的频率特性趋于稳定，固有频率频峰升高； 6理论分析表明，干接触时钢球和滚道表面波纹度的某些谐波分量能激励球轴承的振动，振动的幅值与谐波幅值成正比，实际球轴承中钢球的分布不可能完全均匀，波纹度的激励作用会随时发生；润滑接触的分析表明，波纹度的任意谐波分量均能激励球轴承的振动； 7球轴承的几何和结构参数分析表明，球轴承尺寸越大，径向、轴向和角振动的固有频率越低；钢球中心圆直径增大，球轴承的径向和轴向振动的固有频率基本不变，角振动的固有频率有所上升，振动的幅频特性基本不变；径向游隙加大使球轴承的径向振动固有频率降低，轴向和角振动的固有频率有所升高，径向振动幅频特性的幅值升高，而轴向和角向降低；钢球的数量增多使球轴承振动的固有频率上升，幅频特性的幅值下降，径向振动的幅值下降最为明显；外圈沟曲率半径系数增大使球轴承径向振动的固有频率升高，轴向和角振动的固有频率降低，径向幅频特性基本不变，轴向和角向幅频特性幅值升高；内圈沟曲率半径系数增大使径向、轴向和角振动固有频率均下降，振动幅频特性的幅值均有升高； 8试验对比表明，传感器采用探针式安装时，由于探针接触副接触特性的影响，钡(量得到的球轴承振动信号有失真，采用专门设计和制作的试验球轴承，以固定式安装加速度计，首次测量得到了球轴承振动的真实信号，通过对振动信号的分析，验证了球轴承振动的理论模型； 9)基于时间序列分析的AR模型适用于大样本球轴承振动信号的分析，以样本长度的均方根值作定阶上界，FPE做判阶准则，给出的AR谱光滑，频率分辨率高，是球轴承振动分析的简便而可靠的手段； 10以时频域分析的小波包变换分析球轴承异音信号能够比较好地定位和聚焦异音发生的时间，时间间隔，频率范围，同样是球轴承振动分析的可靠的手段，可用作球轴承故障诊断技术。

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个人用品：高尔夫球(14种)、捞球器(16种)、小球袋、画球器、印球器、吸球座、高尔夫鞋、鞋钉、取钉器、帽子、手套、毛巾、伞、望远镜测距仪、测速测距仪、手提袋、冰袋、球托架、球托TEE (8种)、高尔夫工具、配重铅条、球展示柜等；3、高尔夫礼品：推杆器礼品套装、折合杆精装、高尔夫挂表、香表座、桌上用品、奖杯、高尔夫画等；4、球具及相关配套件：球具、特色杆、握把、胶套、球杆、铁杆架、球具架、推杆夹、球头、球头套、球袋、球袋挂牌、枪袋、球包外套、球包雨罩等；5、球具检测维修生产设备：假平衡秤、级数板、扭力测量器、退杆机、磨杆机、球头烤箱、球杆烤箱、喷漆台、装握把机等

The assembly of journal and plain bearing liner space is too little, force of organic still oil pressure is small it is the crucial index that affects lubricant result, make lubricate because of lacking engine oil between crankshaft and plain bearing liner and bite dead invalidation, include to be pulled badly, lack lube, layer of alloy of dry attrition generation is fused, grind sliding surface to did not maintain the oily film of certain ply, and all sorts of local overload exhaustion are destroyed, cavitation erosion and V form are destroyed etc, through technology of him director diesel locomotive old experience reachs the analysis of pair of its breakdown reasons, put forward precautionary measures especially. As a result of,the burns caustic mechanism plain bearing liner to burn caustic mechanism of 1 plain bearing liner is the lube film burst between journal and plain bearing liner, cause plain bearing liner and crankshaft generation clash, below high temperature, high pressure and high rotate speed, the wear-resisting alloy layer of plain bearing liner wears away prematurely or fuse, cause plain bearing liner and crankshaft to stick thereby bite, can make the steel back of plain bearing liner and Kong Zhong produces whirligig, inlet port is jammed, carry on the back by steel again with the friction of aperture causes high temperature to make plain bearing liner burned-out further, can cause bolt to break off, happen swing a malign accident that pounds cylinder body of bad internal-combustion engine.

轴颈和轴瓦的装配间隙太小，还有机油压力低是影响润滑效果的关键指标，使得曲轴和轴瓦之间因缺少机油润滑而咬死失效，包括严重拉伤，缺少润滑油，干摩擦产生合金层熔化，磨滑面没有保持一定厚度的油膜，以及各种局部过载疲惫破坏，气蚀和V形破坏等，通过本人主管内燃机车技术多年经验及对其故障原因的分析，特提出预防办法。1轴瓦的烧损机理轴瓦烧损的机理是由于轴颈和轴瓦之间的润滑油膜破裂，导致轴瓦和曲轴产生摩擦，在高温、高压和高转速下，轴瓦的耐磨合金层过早地磨损或熔化，从而引起轴瓦和曲轴粘咬，会使轴瓦的钢背和座孔中产生旋转运动，进油孔被堵塞，再由钢背和座孔的磨擦进一步引起高温使轴瓦烧坏，并会造成螺栓折断，发生甩出捣坏内燃机缸体的恶性事故。

Our company mainly manufactures under products: deep groove ball bearing series, self-aligning bearing, taper bearing (metric standard and inch standard), thrust ball bearing, car bearing, non-standard car bearing, pillow block spherical bearing, various bearing inner and outer ring forgements, various finished products inner and outer rings etc.

主要生产的产品有深沟球轴承系列、调心轴承、公英制圆锥轴承、推力球轴承、汽车轴承、非标汽车轴承、带坐外球面轴承、各种轴承内外套圈锻造和内外成品套圈。

The registered mark of Derun is WDRZ. We specialize in manufacturing thrust roller bearings. Our main products are thrust ball bearings, thrust cylindrical roller bearings, thrust taper roller bearings, thrust angular contact ball bearings and thrust aligning roller bearings ,deep groove ball bearing,spherical plain bearing,self-aligning bearing ,slewing bearing,and so forth. We also produce non-standard thrust roller bearings ,cylindrical roller bearing ,tapered rolling bearing,oscillating bearing,four-point contact ballbearing according to customers' requirements.

瓦房店德润轴承制造有限公司注册商标为&WDRZ&是专业制造推力找的制造厂家，产品包括：推力球轴承、推力角接触球轴承、推力圆柱滚子轴承、推力圆锥滚子轴承、推力调心滚子轴承、满滚子圆柱轴承、关节轴承、深沟球轴承、英制圆锥轴承，并且可以根据用户要求设计制造各种非标准轴承。

The registered mark of Derun is WDRZ. We specialize in manufacturing thrust roller bearings. Our main products are thrust ball bearings, thrust cylindrical roller bearings, thrust taper roller bearings, thrust angular contact ball bearings and thrust aligning roller bearings ,deep groove ball bearing,spherical plain bearing,self-aligning bearing ,slewing bearing,and so forth. We also produce non-standard thrust roller bearings ,cylindrical roller bearing ,tapered rolling bearing,oscillating bearing,four-point contact ballbearing according to customers' requirements.

瓦房店德润轴承制造有限公司注册商标为&WDRZ&是专业制造推力轴承的制造厂家，产品包括：推力球轴承、推力角接触球轴承、推力圆柱滚子轴承、推力圆锥滚子轴承、推力调心滚子轴承、满滚子圆柱轴承、关节轴承、深沟球轴承、英制圆锥轴承，并且可以根据用户要求设计制造各种非标准轴承。

We produced by the elastic rubber ball is high-quality synthetic rubber made include: three-dimensional of the ball, the ball picture, the electronic ball, the ball modeling, three-dimensional King of the ball deep, luminous ball, the ball monochrome, multicolor Ball, the ball printed in Pictures, a key hammer, magnet ball, water polo, with a large bounce of.

我们所生产的橡胶弹力球是由高品质的合成橡胶制成，种类包括：立体物球，图片球，电子球，造型球，深景立体物球，夜光球，单色球，多色球，剪影印刷球，钥匙链球，磁铁球，水球等，具有相当大的弹跳性。

The effect of the friction moment of bearings on performance is researched. The forming mechanic and influence factors of the friction moment of ball bearing are analyzed. Suitable clearness and groove radius of ball bearings are obtained by experiment and calculation. The relationship between starting moment of ball bearing and various lubricants is analyzed. The measure for reducing the starting moment of ball bearing is put forward, it is the theory basis and reference for ball bearing design of small power unit system.The system is an unstable system when the 24-station ball pen tip production machine is running because of various interferences. It is too hard to describe the system by linear method, so the nonlinear formulation must be used.

研究了小动力头系统轴承摩擦力矩对运转性能的影响，分析了球轴承摩擦力矩的产生机理及影响因素，采用实验和计算的方法得到了动力头球轴承的合理间隙及球轴承沟曲率半径，分析了各种润滑剂与球轴承启动力矩的关系，并提出了减小轴承启动力矩的措施，为小动力头系统的轴承设计提供了理论依据及实践参考。24工位笔头加工机械在笔头的生产加工过程中，由于受到各种因素的干扰是一个不稳定系统，其稳定性会发生一定变化，而且很难用线性方法表述。

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建议客户采用以下关键词搜索你想要的各类笔产品：高档广告笔、好质量广告笔、优质广告笔、高级圆珠笔、高档礼品笔、高档金属笔、名牌礼品笔、礼品广告笔、深圳广告笔、拉画广告笔、广告笔求购、西安广告笔、笔广告、上海广告笔、义乌广告笔、桐庐笔厂、分水笔厂、圆珠笔厂、制笔厂、广告笔厂家、广告笔批发广告笔订做、广告笔批发、广告笔定做价格、上海广告笔、杭州广告笔生产、南京广告笔、西安拉杆广告笔、礼品促销礼品、广告笔厂、上海广告笔、广州广告笔、中山广告笔、广告笔制作、深圳广告笔、沈阳广告笔、上海广告笔制作、武汉广告笔、重庆广告笔、环保圆珠笔、圆珠笔油、百能圆珠笔、圆珠笔画、圆珠笔生产厂家、圆珠笔厂、圆珠笔肖像画、圆珠笔道清洁方法、卡通圆珠笔、圆珠笔的发明、可擦圆珠笔、万宝龙圆珠笔、圆珠笔英文，我想通过以上笔的关键词肯定会采购到满意的各类笔。

Objective To investigate the relationship between ovum fertilization rate and sperm morphology, acrosome reaction in IVF and to explore the influence of parameters of sperm on fertilization rate.

目的 研究体外受精(in vitro fertilization，IVF)中精子形态、顶体反应与卵子受精率之间的关系，分析精子各参数在IVF受精率方面的参考意义。

A: I hear Mr. White wants to run for the Presidency!

我听说怀特先生要参加总统竞选！