查询词典 in the groove

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。

But if you're using Groove in mostly an ephemeral fashion, you won't need the service.

如果你使用Groove的时间很短，就没有必要使用这项服务了。

An introduction is a must I bust these rhymes So now the time for this MC to go for mine All tied up with your girl is naughty Check it, change to an ultimate groove, and this DJ's got flow for you Flows in twos in fours straight rap combos Straight bumbin in my ride layed back eyes closed, Crusin through the sand-cadillac man I'm about to tell you what is the game plan Move from the valley up to the higher land Rock groove Seoul Bangkok and Japan Sippin Ginseng brew bro, I thought I told you Your girl was colockin the kid so he had to Ah, ah I want to drive like you I want to be down with your Cadillac crew My man's in the Eldorado Cadillac Picking up sisters milky like similak You best believe he got the shinny hub caps You best believe he got the gold teeth caps My man's in the fleetwood and it's all good Picking up actresses placing them on mattresses, Rolling over cactuses Running things like laxatives Cadilliac spedialist, the most spectacalist Southwest Cadillac rollin crew Kicking back as we bust these rhymws for you, low ridin in a Cadillac is a must, As we bimpin'straight beat from the back of the trunk

概论是我一定胸像这些儿歌所以现在时间是mc去矿井一切捆绑你的女孩是顽皮的检查，转变为一个最终槽， d这个dj的got流为你流twos会合直rapcombos直bumbin我坐la 李明回闭眼 crusin通过砂凯迪拉克男子，我要告诉你的是什么游戏规则，从河谷到上级土地岩坡汉城曼谷和日本sippin人参brew买，我笔休我告诉你一女童被colockin流星语于是只好啊，啊我要驾驶你一样，我想我们应该让你的卡迪拉克船员男子汉的在eld orado凯迪拉克拾乳熟姐妹一样similak你最好相信他抓到非煤枢纽头套，你最好相信他有金牙头套男子汉的在fleetwood和它的一切好拾演技使它们床垫，滚动cactuses办事情泻剂cadilliacspedialist，最spectacalist西南凯迪拉克rollin队员踢回，因为我们这些胸像rhymws你低 ridin在凯迪拉克是必须的，因为我们bimpin'straight击败来自背面的主干

Assembled wire rollel: applicable for reasonable guiding of various enameled wires and silks. the middle ceramic coil is made of precise ceramic and matched with high-speed bearing. the groove is polished to ra0.2. baffles in both sides can prevent the enameled wire to jump out of the groove during winding and the winding tension can be maintained in a stable manner.

产品介绍：组合导线轮：用于漆包线或丝线适量导向，其中部瓷圈由精密陶瓷制作，凹槽超精抛光达ra0.2，瓷圈配高速轴承，两侧的挡板可防止绕线时漆包线跳出槽外，同时使绕线时的张力保持稳定一致，也有直接由全陶瓷与高速轴承组合的叫陶瓷瓷轮。

The dynamo runs at rull speed to drive main shaft,then the main shaft makes the emulsifying wings in emulsification grove rotate,which absorbs the liquid in its brand groove into ring groove through guide vanes on upper and lower side s of the groove.The v

由电动机全速运转带动主轴，经主轴转动乳化框槽内之乳化翼片，使其将桶槽内之液体经框槽上、下两侧之导流叶片吸入环状框槽内，经以主轴为中心高速圆周旋转叶片；连续使乳化翼端刀面与乳化框间极小之间系高频率之强力切割剪断、粉碎，再借叶片高速离心旋转排挤，持续循环混合，以极短之时间即可完成均质乳化之处理。

One point is the tail portion of an axial flange swaged into a groove in the rack, and a second part of the same axial flange has a groove for retaining a locking ring in a second groove in the rack.

一个连接点就是一个轴向凸缘的后部，该轴向凸缘被锻压到齿条的一个沟槽内，该轴向凸缘的第二部分设置有一个沟槽，该沟槽用于将锁紧环保持在齿条上的一个第二沟槽内。

Kempers' study , the more layers the mesh screen type had, its resistance against gravity was higher, but its heat resistance and flow resistance were comparatively augmented. As mentioned in the preceding paragraph, it is extremely difficult for a single micro structure based on any of the three types to possess both low flow resistance and strong capillary force. Faced with this fact, the researchers have tried to mix the three micro structures in Table 2 into as many combinations as possible so that a composite micro structure with low flow resistance and great capillary force may be fabricated. After a thorough analysis, the groove combined with sintered metal or mesh screen has been found to be a better alternative. However, the groove combined with sintered metal will raise the flow resistance of the channel, and the aluminum substrate employed in this research cannot be sintered into a micro structure. As a result, the groove combined with mesh screen is finally chosen as the composite structure to enhance its capillary force and at the same time maintain its high permeability. In this way, the heat pipe will not fail due to the working angles.

Kempers 的研究当中提到，当网格结构越多层时，其对抗重力的能力也越强，但相对的其热阻以及流阻也越高，就如同前段所述，我们很难在单一结构当中找出一流阻低且毛细力之微结构；因此本研究便以表2中之三种微结构进行组合，找出一低流阻且毛细力强之复合式结构，经分析发现，沟槽搭配烧结以及沟槽搭配网格为较佳之组合方式，但由于烧结搭沟槽构造将会提高流道之流阻，且本研究使用铝做为基材，并无法使用烧结最为其微结构，故将采用网格搭配沟槽之复合式结构提高结构的毛细力，并维持沟槽结构的高渗透性，解决因角度造成热管失效的问题。

We are a professional production of heat sink products such as machinery companies, mainly produced automatic Fu groove machine, Fu groove machine, saw feeder, semi-automatic Fu groove machine, saw grinding machines, mechanical heat sink, heat sink Saw , PCB machinery tools, alloy saw, milling slot machines, polishing machine, abandoning-cutting tools and other products, including the ISO standard goods, forming a special knife in the design and development, to create more high-precision cutting tools for the goal.

我们是一家专业生产散热片机械等产品的公司，主要生产全自动涪沟机，涪沟机，锯料机，半自动涪沟机，锯片研磨机，散热片机械，散热片锯片，线路板机械刀具，合金锯片，铣槽机，抛光机，舍弃式切削刀具等产品，包括ISO规格品、特殊成型刀的设计和研发，更以制造出高精度切削刀具为目标。

There is a oil groove, a oil hole and two rows of needles in the needle outer ring of wide series, but no oil groove and oil hole in the narrow series which has only one row of bearing unit.

宽系列的滚针轴承外圈有一条油槽，一个油孔，并有两列滚针组。窄系列的有一列滚针组件，没有油槽和油孔。

The advanced method is to use a new type of bearings are embedded in the seal groove, the groove depth than the standard bearings are slightly A42C Type Pound-Grade Low Lift Spring Loaded Safety Valve shallow point, and just fit in the intersection part, fill in the gap left by the outer ring flange.

该先进方法是用一新型有凹槽的密封圈嵌入轴承中，该凹槽深度要比标准轴承的稍浅点，且恰好适配于相交部分，填入外圈凸缘留下的间隙。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。