当垂直刀架下降时，由于摩擦力阻碍其下降，使丝杆的上螺旋面螺母的下螺旋面相接触，丝杆螺母的间隙在下面。
When the vertical turret decline, due to friction hinder its decline, the screw on helical screw nut under the physiognomy contact screw nut in the space below.
用BP人工神经网络建立了重载丝杆螺母副的摩擦学特性与载荷之间关系的磨损自补偿数学模型。
The BP neural network used the wear-self-compensation mathematics model of the relationship of tribology characteristic with load of the heavy load screw-nut pairs was established.
阀杆采用防吹出保护结构，低摩擦系数的轴承等。
Protection structure with blowout proof stem, low coefficient of friction bearings and so on.
电站锅炉给水调节阀的阀杆密封采用柔性石墨填料，既降低了摩擦力，又为调节阀的运行节约了能源。
The stem seal of a feed water control valve uses expanded graphite packing in order to produce friction and to economize on energy for the control valve working.
采用离散单元法，分析了当荷载、岩体的摩擦角、锚杆间距、锚杆方向和岩体的性质变化时，顶板的稳定性。
Discrete element method is used to analyze the roof stability in accordance with the variation of its loading, rock frictional Angle, bolt spacing, rock properties and bolt orientation.
砂固结预应力锚杆的锚固力是由砂体与锚孔壁之间的摩擦力提供的。
The anchorage force of consolidated anchorage with prestressed bolt is actually the friction resistance between sand and the wall of drill hole.
离合器是位于发动机和变速器之间的一个旋转装置，它包括飞轮，离合器摩擦片，压盘。压紧弹簧。离合器盖以及操作离合器所需要的连接杆件等。
The clutch which includes the flywheel, clutch disc, pressure plate, springs, cover and the linkage necessary to operate the clutch is a rotating mechanism between the engine and transmission.
这时螺母没有托住丝杆以及整个刀架部件的重量，由于摩擦阻力的作用而不下落。
Then screw nut did not try to jack up the entire turret components and the weight, the role without friction whereabouts.
在另一实施例中， 一压电元件与一阻力件相接，该阻力件与该杆件以静摩擦力相接触而固定；
One other embodiment has one piezoelectric element, one resistance part connected to the piezoelectric element and one rod normally fixed by means of static friction force.
在另一实施例中， 一压电元件与一阻力件相接，该阻力件与该杆件以静摩擦力相接触而固定；
One other embodiment has one piezoelectric element, one resistance part connected to the piezoelectric element and one rod normally fixed by means of static friction force.
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