The loading state and performance of hydraulic hammer drill's impact piston were discussed.
分析了液压凿岩机冲击活塞的受力状态与性能要求 ,选择国产合金钢 30CrNi2MoV进行渗碳、淬火和回火处理 ,研制出替代进口的冲击活塞 ,其使用性能达到或超过国外同类产品 ,为制造高寿命液压凿岩机冲击活塞提供了一种新的方
According to it that can gain the account formulas of impact piston system.
以此为基础得出了冲击活塞系统的基本参数设计计算公式,并以液压冲击器供油峰值流量最小为优化设计目标,进行了优化设计,求得了抽象设计变量最优值αu。
Simulation analysis of piston slap of internal combustion engine;
内燃机活塞拍击仿真分析
Study on Piston Slap and Induced Noise of Internal Combustion Engine;
内燃机活塞拍击及其噪声研究
In order to study the piston slap mechanism of internal combustion engine,a detailed theoretical model and simulation was conducted.
根据活塞在实际工作过程中的受力,建立了考虑润滑油膜阻尼和摩擦作用的活塞拍击现象集总参数非线性动力学模型。
Focusing on the surface vibration of diesel engine block induced by piston slap,a subsystem model of statistical energy analysis was constructed in this paper.
针对柴油机活塞敲击力引起的机体表面振动,建立了统计能量分析子系统,利用试验方法获取了子系统的模态密度,并估算出不同频带内子系统的等效质量,进而得到子系统的内部损耗因子和耦合损耗因子。
The impact force induced by piston slap is one of most important excitingsources of mechanical vibration and noise of diesel engine.
活塞敲击力是柴油机机械振动噪声的重要激励源,由于活塞敲击缸壁发生在在气缸内部,使得精确测量活塞敲击力比较困难,因此,从理论上建立合适的模型来计算活塞敲击力成为获取敲击信息的有效方法。
diamod-enhanced hammer bit
金刚石镶齿震击钻头
pressure balanced drilling bumpersub
压力平衡式钻井震击器
oil-sealed jar safety joint
油封式震击器安全接头
fishingcoring jar
打捞和取心用震击器
An analysis of the failure of the while-drilling bumper sub and damper and its solution
随钻震击器及减震器失效分析与解决方案
By using this jar together with Model YJQ jar accelerator, more remarkable effect can be obtained.
这种震击器与YJQ型震击加速器一同使用，可获得更显著的效果。
Improvement and Application of Hydraulic Jar for High Pressure and Super Deep Wells
高压、超深井液压震击器的改进及应用
pneumatic shockless jolt-squeeze moulding machine
气动无冲击震实造型机
The sound, vibration, or shock caused by the striking together of two bodies.
震动由于两物体的撞击造成的声音、颤动或震惊
The massive shock blew off his shoes and knocked him unconscious.
重重的电击将他的鞋子震飞，将他震得不省人事。
The patient is suffering from severe concussion following a blow to the head
患者头部受击後患严重脑震荡
unconscious from a blow or shock or intoxication.
因为打击、震动或者陶醉而失去了知觉。
Do you think it likely that another big earthquake will hit Los angeles?
你认为还有一次大地震袭击洛杉矶吗?
He was bodly jarred by the blow.
那打击使他的神经震动得很厉害。
An earthquake is likely to strike the area in a year or two.
地震可能在一两年内袭击这一地区.
The strings of a piano vibrates when the keys are struck.
钢琴的琴键受击时,琴弦就会震动。
Shock upon shock continued to buffet the America of the 1960s.
震撼一个接一个冲击六十年代的美国。
The hammers strike the piano strings and vibrate them.
音锤敲击钢琴的弦并使之震动。