查询词典 involute

Most of hob design for non-involute gears are nowadays taken by approximation method.For example,the normal sectional profile of hob worm therad is usually regarded approximately as its basic rack profile.Recently, some new methods have been developed in this respect but, perhaps, they appear overelaborate since the principle of spacing engagement is based on. For this reason , the paper offers a new design procedure for hob worm based on the planar engagement principle with the intention of simplific...

本文应用平面啮合原理精确设计各种非渐开线齿轮滚刀的基本蜗杆，提出并应用啮合线的投影原理从工件齿轮端截面的啮合线直接求得刀具蜗杆的端面齿形，而不必求出媒介齿条的齿形，方法很简单，还从啮合线的投影原理简明而形象地证明了一对螺旋齿轮直接啮合过程的啮合线是一条垂直于齿向的平面曲线。

Lowermost leaf sheath retrorsely strigose at base, uppermost sheaths closed 1/6–1/3 of length; blade grayish green, flat, folded, or involute, papery, 2–8 mm wide, abaxially smooth, adaxially nearly smooth to densely scabrid along prominent veins, apex slender prow-tipped; ligule white or off white to brownish or yellowish, membranous-papery.

最下的叶鞘反曲的具糙伏毛的在基部，最上部的鞘关闭长度中的1/6-1/3个；叶片灰绿色，平，折叠，或内卷，纸质，毫米宽，背面平滑，正面近平滑兑一沿着突出脉浓密粗糙，叶舌白色或者离或者淡黄，膜似纸白色的到带褐色。

Leaf sheaths smooth; leaf blades linear, flat or involute toward apex, 3–20 cm × 1–3 mm, scaberulous; ligule 1.5–4 mm, back scaberulous, apex obtuse or acute.

叶鞘平滑；叶片线形，平的或内卷向先端，3-20厘米×1-3毫米，微糙；叶舌1.5-4毫米，返回微糙，先端钝或锐尖。

Leaf sheaths scabrid; leaf blades flat or involute when dry, 2–13 cm, 1–4 mm wide, scabrid, apex acute; ligule 2–4 mm, lacerate.

叶鞘粗糙；干燥时的叶片平或内卷，2-13厘米，1-4毫米宽，粗糙，先端锐尖；叶舌2-4毫米，伤害。

Leaf sheaths glabrous, pilose at mouth (hairs ca. 2 mm), tightly overlapping; leaf blades gray-green, involute or rarely flat, 4–18 cm, abaxial surface smooth, adaxial surface scabrid.

在嘴(毛约2毫米)无毛，具柔毛的叶鞘，紧紧地重叠；叶片灰绿色，平的内卷或很少，4-18厘米，背面平滑，正面。

Culm sheaths deciduous, leathery to thickly papery, usually rigid, white powdery, apex truncate or concave, sometimes with subcircular projection at base of one margin; auricles usually inconspicuous; oral setae usually developed; ligule short, truncate, margin serrulate or fimbriate; blade usually reflexed, adaxially densely hispid, apex usually involute.

竿箨脱落，似皮革的到厚纸质，通常硬，白色粉状，先端截形或者凹，叶耳通常不明显；口头的刚毛通常发育；叶舌短，削去，边缘有细锯齿或流苏状；叶片通常反折，正面密被糙硬毛，先端通常内卷。

The influencing tendency,principle of action and the extent of influence of eight factors effecting on the undercutting of external toothing involute columnar gear are discussed.

讨论了外啮合渐开线圆柱齿轮根切的全部共8个影响因素的影响倾向、作用原理和影响程度，给出了一个新参数——根切系数，用以衡量根切倾向的大小，使对渐开线齿轮根切的产生条件的认识更为全面。

But the involute gear exposes certain own defaults too, such as the external toothing transmission is the engaging transmission of the protruding tooth to the protruding tooth, its contact stress is big,bearing capacity is low etc.

但是渐开线齿轮也暴露出自身一些缺点，如外啮合传动是凸齿对凸齿的啮合传动，其接触应力大，承载能力低等缺点。

On the base of simply introducing running transmission mechanism of shearer,according to the theory of rack and pinion engagement,mainly analyses impact cause resulted from toothing between shearer involute sprocket and conveyor pin-rail ,using the specific parameters.

简单介绍了目前大功率采煤机的行走传动装置，并结合某采煤机渐开线行走轮和输送机销排销齿的具体参数，按照齿轮齿条啮合理论，分析了此渐开线行走轮和销齿啮合产生冲击的原因之一。

Parametric design programs of the total tooth models of unsymmetric and symmetric involute gears were developed by Autolisp language, and the total models were transferred into ANSYS and calculated by finite element method.

用Autolisp语言开发了非对称与对称齿轮全齿模型的参数化设计程序，将生成的全齿模型导入ANSYS进行有限元分析。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。