查询词典 flutter valve

In order to decrease the loss energy, a new kind of sleeve valve of hydraulic impactor is designed. It takes the technical measure of cone valve and optimum unequal polite of valve. The sleeve valve has features of little leakage, little pressure loss and low energy cost.

为了降低能源消耗，研制了一种新型的液压冲击器配油阀，该阀采用锥阀阀口形式和优化的不等阀开口量技术，使配油阀泄漏量小，阀口压力损失小，换向运动能耗低，液压冲击器效率高。

Through the analysis of different cross section flow field in cylinder of two-valve and four-valve diesel engine, the following conclusion can be obtained: The formation of intake swirl of two-valve diesel engine mainly is effected by an intense air flow ring zone near the radius from valve axis to cylinder axis, as the flow progresses down through the cylinder, the ring zone air flow expends to both side and finally forms an unified rigid rotating swirl motion.

2号缸盖的螺旋进气道产生的绕自身气门轴线的动量矩比1号缸盖的大，且切向气道的径向速度在前峰面上的数值比1号缸盖的速度数值大很多，因此，两进气道组合后的动量矩损失也大，所以虽然2号缸盖的两个进气道单独的涡流比都高于1号缸盖的两个进气道，但组合后的合成涡流比却是基本相同的。

In order to study the intake air flow characteristics in four-valve diesel engines, in this dissertation hot-wire anemometer and PIV twodimension instantaneous measuring technique are used. Extensive experimental study on two intake valve exit flow fields and longitudinal section flow field in cylinder are performed for different type of diesel engines. Great researching progress have been made on the interaction between two intake ports, and the formation process of in-cylinder swirl and flow field structure of cross and longitudinal section for four valve diesel engines. These results are presented in China for the first time and without such kind of research work reported abroad as detailed and deepgoing as this dissertation. The author designs and makes a set of hot wire measuring velocity device to measure the velocity distribution around the intake valve annulus and the cross section flow field in cylinder.

为了研究四气门柴油机进气过程中气体流动的变化规律，本文利用热线测速和PIV二维瞬态测速技术，对四气门柴油机两进气门出口全圆周流速场和缸内横、纵剖面的气体流动流场进行了大量的试验研究，在四气门柴油机两进气道之间相互影响的变化规律，缸内涡流的形成过程及缸内横、纵剖面流场结构等方面取得了重大的研究进展，这一研究工作在国内尚属首次，在国外也未见有如此全面、深入的研究报道。

The valve body and valve cup of mud pump are parts that are easily to be worn and broken. In order to increase the life-time of these parts, we studied the technology of increasing the life-time of valve body and valve cup by ionic welding.

泥浆泵的凡尔体和凡尔座是泥浆泵上的易损件，为了提高凡尔体和凡尔座的使用寿命，我们试验研究了用等离子喷焊耐磨合金来提高凡尔体和凡尔座性能的工艺。

The machining of valve guider and valve set is one of the key process in production of engine cylinder-head.Arming at the precision finishing of valve guider and valve set,a special compound deep-hole cutting tool was designed and made out.

发动机气门导管孔和气门座圈的加工是发动机缸盖加工的关键工艺之一，针对气门导管孔与气门座圈的精密加工，设计制造了专用的复合深孔加工刀具，介绍了该刀具的结构与加工原理，并在试验的基础上优选了加工刀片材料，设计了加工刀片的结构参数。

Especially for the fluid containing sand, cutting may damage the sealing surface 5, soft sealing gate valve of the operating temperature limits by the valve seal material good throttle control when needed (such as control valves or bypass pipe had a small vent), the cut-off valve is the most appropriate valve.

尤其对于含有砂的流体，节流会损坏密封表面 5、软密封闸阀的操作温度受密封材料的限制截止阀当需要好的节流控制（如控制阀的旁通管路或有小的排气孔）时，截止阀是最合适的球阀。

Especially for the fluid containing sand, cutting may damage the sealing surface 5, soft sealing gate valve of the operating temperature limits by sealing material Valve When the need for good throttle Cast Gate, Globe, Check Valves control (such as control valves or bypass pipe had a small vent), the stop valve is the most appropriate Ball When the operating temperature between-29oC to 200oC, most manual valve suitable for hydrocarbon and utility systems operations, the use of the ball at 100oC above, applications should be carefully considered when the temperature of the soft sealing material limit should be more than 100oC.

尤其对于含有砂的流体，旋塞阀节流会损坏密封表面5、软密封闸阀的操作温度受密封材料的限制截止阀当需要好的节流控制（如控制阀的旁通管路或有小的排气孔）时，截止阀是最合适的球阀当操作温度在-29oC至200oC之间时，大部分手动球阀适应于烃及公用系统的作业中，在100oC以上使用的球阀，应用时要仔细考虑软密封材料的温度限制应该在100oC以上。

Volute spring series win outstanding new products special awards in 2002 China General Machine Components Industry Association. Steyr valve inside and outside spring of engine, automobile suspension spring, die spring series won the excellent new products prizes. GW2.4S (4G6) valve spring of engine series won outstanding new products special awards in 2003 China General Machine Components Industry Association. Geely MR479Q valve spring of engine, power tool spring, high stress piston pin-spring flange series won excellent prizes meanwhile. Valve spring series won the excellent new products prizes in 2004 China General Machine Components Industry Association. Hydraulic pressure spring won excellent prizes meanwhile.

涡卷弹簧系列荣获2002年中国机械通用零部件行业优秀新产品特等奖；斯太尔发动机气门内、外弹簧、汽车用悬架弹簧、模具强力弹簧系列同时荣获新产品优秀奖；GW2.4S(4G6)气门弹簧系列荣获2003年中国机械通用零部件行业优秀新产品特等奖；吉利MR479Q气门弹簧、电动工具冲击弹簧、高应力活塞销档圈系列同时荣获优秀奖；阀门弹簧和液压弹簧分获2004年中国机械通用零部件工业协会优秀新产品特等奖和优秀奖。

It is considered that link wear speed on seal surface is proportional to the contacting pressure. The impacting of valve disk on valve seat is the important reason of abrasive wear, and the relative motion of disk is a main reason for errosion wear of pump valve. The cycles per minute is an important factor to influence the valve motion and the impact force.

结果表明，泵阀密封面联接磨损的磨损速度与密封面上的接触比压成正比，泵的冲次是影响阀盘运动规律及对阀座产生冲击的重要因素，泵阀产生磨粒磨损和疲劳磨损的主要原因是泥浆、阀盘和阀座的冲击，冲蚀磨损导致泵阀的刺蚀。

Original design of vacuum furnaces for the three furnace feed valve sleeve, due to feed containing residue, impurities, often control valve block, and the temperatures are high, easily condensed to give instruments to bring a lot of work to maintain, in June 1998 will be 3-way feed to the rotary valve for FISHER, due to rotary valve has a strong distribution capacity to overcome these problems, operating normally.

原设计减压炉3炉进料为套筒阀，由于进料含有渣油、杂质，经常将控制阀堵住，且温度高、易凝结，给仪表维护带来大量的工作，1998年6月将3路进料该为FISHER旋转阀，由于旋转阀具有较强的流通能力，克服上述问题，运行正常。

As a dominant party,CPC government should play a guardian,supervisee and guarantee role to overcome all the difficulties in the development of charitable cause and bring it into full play in the establishment of harmonious society on policies and regulations basis.

在中国共产党的文献中第一次把发展慈善事业提到&最广泛最充分地调动一切积极因素，不断提高构建社会主义和谐社会的能力&的高度来认识。近年来，社会学界对慈善事业的理论专著发表较多，有鉴于此，笔者不揣浅陋，谈谈自己的认识和见解。

Flow through the land, the land of the scale of operation allows the effectiveness of the land may be raised.

通过土地的流转，土地的规模经营可以让土地的效益得到提升。