机械论文英文

4个回答默认排序

默认排序

按时间排序

密果儿小雨

已采纳

The multi-motor driveDescription:The present invention concerns a drive for an escalator, which drives the stair belt and is arranged on one or both sides of the escalator at the upper and/or the lower end thereof, wherein the drive comprises a main drive wheel and at least one motor with gear and brake BACKGROUND OF THE INVENTION Different dispositions and constructional principles are known for escalator Since the drive must be designed for the maximally occurring load, a relatively large and strongly dimensioned motor with a corresponding gear is Poor efficiency at the mostly prevailing partial load and the large installation volume in the case of limited space availability within an escalator construction are disadvantages of such a These disadvantages are present to a lesser degree or not at all with multi-motor Such a drive for escalators and walkways, which comprises two individual drives or two twin drives, the output gearwheels of which drive the stair chain or the plate chain and, by way of an additional gear, the handrail, is known from DE 35 26 Such a construction is executed in different variants and correspondingly comprises a number of different gears and gear housings for the stair chain drive or the plate chain Furthermore, the individual drives are equipped with planetary gears, which causes relatively high The object of the present invention is to create an improved multi-motor drive for escalators, which can be implemented at favorable costs, which may be built up in a modular manner, and which covers a usual performance BRIEF DESCRIPTION OF THE INVENTION The drive according to the present invention distinguishes itself by several constructionally identical drive units being mountable distributed at the circumference of a main drive wheel, whereby the main drive wheel or its toothing need be dimensioned only for loading by a single drive The main drive wheel itself thus can have a smaller width, which is of great advantage for the accommodation of the drive parts in the case of an The drive units, in a number corresponding with power requirements, may be flange-mounted to a main gear housing identical for all performance This simplifies the production process for the entire constructional series, reduces the inventory and facilitates maintenance and The drive units are provided with torque transmitters and/or rotational speed transmitters for recognition of their mechanical Each of the drive units can furthermore be provided with a clutch which makes a selectable switching-in or switching-out of a drive unit The drive further comprises a frequency-setting device which is common to all drive units and by means of which different speeds can be set and which also serves as a starting A control and regulating unit produces corresponding control and regulating commands by the processing of incoming The control and regulating unit causes the switching-in and switching-out of individual drive units on the basis of actual load data from the torque transmitters, which helps to improve the electrical and mechanical efficiency and thus also reduces the energy The use of polyphase alternating current squirrel-cage motors of variable frequency and their associated control has the advantage that high torques can be produced at low rotational BRIEF DESCRIPTION OF THE DRAWINGS The invention is explained more closely in the following with the aid of an illustrative example of an embodiment thereof and is illustrated in the accompanying drawings, wherein: FIG 1 shows an escalator with a drive according to the invention at the upper end of the escalator; FIG 2 shows the drive with drive units flange-mounted on a main gear transversely to the direction of travel of the escalator; FIG 3 shows the drive with drive units flange-mounted on a main gear longitudinally of the direction of travel of the escalator; FIG 4 shows a three-dimensional illustration of the drive arrangement according to FIG 2; FIG 5 shows a three-dimensional illustration of the drive arrangement according to FIG 3; and FIG 6 shows a block schematic diagram and functional diagram of the drive with all associated DETAILED DESCRIPTION OF THE INVENTION FIG 1 shows an escalator 1 with an upper end 2, below which drive units denoted by 7 and a part of a stair chain 3 are FIG 2 shows the details of a drive, which is installed within a carrying structure 9 at the upper end 2 of the escalator Three identically constructed drive units 7 drive a toothed main drive wheel 6 by way of an output gearwheel 6 and an intermediate gearwheel 21, and are arranged and distributed about the circumference of the main drive wheel The main drive wheel 6, together with a stair chain wheel 5, are fastened on the main shaft 4 of the The drive units 7 are firmly connected to a main gear housing 8 at three planar flange-connecting openings 24 formed for this When less than three drive units 7 are needed, the unused flange-connecting opening 24 may be closed by a cover and the associated intermediate gearwheel 21 is not With this construction, the same main gear housing 8 can always be used for one, two or three needed drive units The axles of the drive units 7 are arranged transversely to the direction of movement of the escalator 1, which yields the advantage of a short machine As example of a variant, FIG 3 shows an arrangement of the drive units 7 parallel to the direction of movement of the escalator In this manner of arrangement, the drive units 7 additionally comprise a bevel gear Motor 1, clutch 2, brake 4, flywheel 5 and the output gearwheel 6, which are otherwise constructionally identical with and incorporated in the drive units 7 of FIG 2, are present for each drive unit The main gear housing 8 is likewise always the same for one, two or three drive units 7 and unused flange-connecting openings 24 can likewise be covered by a FIG 4 is a spatial illustration of the drive according to FIG 2 within the carrying structure 9 of the escalator Two stair elements 22 are illustrated in addition to the elements shown in the preceding FIG 5 is a similar spatial illustration of the drive according to FIG 3 within the carrying structure 9 of escalator The two stair elements 22 are likewise additionally The function and operation of the multi-motor drive according to the invention is to be explained more closely in the following by reference to FIG The current supply of the drive takes place as usual from local three-phase current mains 13 with phases R, S and T which are led to a main switch Following thereon, the entire drive is connected through a main relay or several relays There then follows a frequency-setting device 16, which by way of a relay control 23 with the relays S1, S2 to Sn feeds the motors 1 (M1, M2 to Mn) of the drive modules 7 at a variable frequency current and direction of rotation as provided by the frequency-setting device The motors M1, M2 to Mn are, as already shown and described in the preceding, operatively connected with the main drive wheel 6 by way of gears 3 and output gearwheels 6 and intermediate gearwheels 21, which are not further illustrated Torque transmitters 20 (L1, L2 to Ln) for the purpose of the measurement of the actual mechanical loading of the motors M1, M2 to Mn are installed at a suitable place in the transmission between the motors M1, M2 to Mn as known in the The main gear wheel 6 drives a speed transmitter 19 by way of an appropriate known transmission, which similarly is not more closely A control and regulating unit 10 contains microprocessor and relay control components, as well as signal and data inputs and First input data line 1 supplies speed values from the speed transmitter 19, which are fed as actual values to an internal regulating The second group of input data lines 2 provide measurement values from the torque transmitters 20 and, through appropriate processing, cause the switching-in and switching-out of individual drive modules A third group of input data lines 3 supplies data from transmitters 11, which essentially concern control safety contacts and mode of operation A first group of output data lines 1 leads to the relays 15 and to the frequency-setting device A second group of output data lines 2 contain control signals for the relay control 23, and the third group of output data lines 3 provides the data to control optical signals and illumination The multi-motor drive according to the invention functions as following: During starting-up of the escalator 1, the relay 15 for the drive is switched on, the frequency-setting device 16 is run up and at least one drive module 7 is switched on by way of the relay control 23 by the control and regulating unit 10 according to the choice of direction and a start-up On reaching the target speed, the drive regulation in the control and regulating unit 10 holds the speed of travel of the escalator 1 constant within close limits independently of the During the now following operation of the escalator 1, the input data lines 2 from the torque transmitters 20 supply information about the mechanical loading of the switched-in drive modules 7 (motors M1, M2 to Mn) In the case of low or no loading by transported persons, the drive power of the first motor M1 may suffice, and the further motors M2 to Mn remain switched If a full loading with a tendency to lasting overload is signalled by the torque transmitter L1, the next motor M2 is switched on after a defined The signals from the two torque transmitters L1 and L2 are now monitored in the control and regulating unit 10 and a further, not illustrated motor M3 may be switched in according to analog criteria when the load limit values of the motors M1 and M2 are The third motor, denoted by Mn in the illustration, is to indicate that, in principle, a greater number of drive modules 7 can be For practical and economic reasons, however, the number of drive modules 7 will probably remain restricted to three or at most The procedure is reversed when the mechanical loading The no longer needed motors 1 are then switched off in the sequence beginning with the motor Mn switched on If a uniform wear of the drive modules 7 is desired, this can be taken into consideration by way of an additional measurement of the switched-on times of the individual drive modules 7 and the individual drive modules 7 can thus be switched on and off selectably and not according to an always identical As already mentioned, the number of the drive modules 7 is not limited to the illustrated three Drive modules 7 produced in large quantities can be very favorable in price, so that it could be feasible to provide a greater number, for example 4 to 6, drive modules With appropriately adapted control programs in the control and regulating unit 10, the greater amount of data resulting therefrom can be processed without The use of direct current motors for the drive modules 7 is also possible in principle with appropriately-adapted control and regulating techniques as known in the Alternating current motors with squirrel cage armatures are preferably used because of their simple mode of construction and ease of Moreover, efficient and likewise cheap frequency-setting devices or frequency converters are Normal spur gearwheels, by means of which an optimum mechanical efficiency is achieved, may be used for the drive arrangement according to FIG Cone wheel gears, by means of which a practically equal efficiency is achieved by comparison with spur gearwheels, are advantageously used as bevel gears 3 for the drive arrangement according to FIG The main gear housing 8 can be so constructed that both drive arrangements, those according to FIG 2 as well as those according to FIG 3, can be The main drive housing 8 then correspondingly has twice as many flange-connecting openings The intermediate gearwheels 21 can be the same at the same position for both drive The drive arrangement according to the invention can also be used for other kinds of conveying equipment, for example for walkways and mercalators in horizontal and oblique

345 评论 2小时前发布

penny900627

1）奖励2015年获美国机械工程师学会（ASME）授予的2015年度ASME机构学与机器人学终身成就奖。2012 获中国机构学学会“学术创新奖”和“国际学术交流奖”。2010 获伦敦大学国王学院2010年度全校最佳博士生指导教师奖（全校每年一名）。2010 获英国系统和控制工程学报《Journal of Systems and Control Engineering》最佳杂志论文奖 (2010PEPublishing Award)2006-2007 获美国电气和电子工程师学会 (IEEE) 和机械工程师学会 (ASME) 颁发的Service Awards(共两项)2005/2007 获美国机械工程师学会 (ASME) 颁发的Service Awards（共两项）2004 ”变胞机构及其应用研究”获英国国家应用科学和工程研究基金奖的国际领先奖（共两项）2003 “变胞机构在包装机机械手上的应用”，“欠驱动机器人机构研究”,“机器人机构可重构研究”分别获英国国家应用科学和工程研究基金奖的国际优秀奖（共三项）1998 获美国机械工程师学会机构学双年度大会最佳论文奖（1990至2000年仅4篇论文获该奖项）2）学术荣誉2006 被英国机械工程院授予“英国机械工程院 Fellow”1996 被授予欧盟特许工程师（EUR ING）1995 被授予英国皇家终身特许工程师（Chartered Engineer）3）主要学术成就戴建生教授长期从事机构学及机器人学研究工作，研究变胞机构和可重构机构的工作开辟了国际机构学和机器人学研究的新方向和新领域，对国际机构学和机器人学学术界产生了重要的影响和引领作用。在英国20余年研究工作中，尤其在世界著名大学伦敦大学国王学院的12年研究工作中，在机构学及机器人学领域取得了丰硕的研究成果，享有很高的国际声誉。戴建生教授作为大会主席主办了首届国际可重构机构和机器人大会(ReMAR2009)等多个大型学术会议；主持完成英国、欧盟及国际合作科研项目40余项，累计科研经费约450万英镑（约4500万人民币）；发表国际期刊论文400余篇，其中国际高水平期刊论文200余篇，核心国际会议论文200余篇；论文被SCI收录220余篇，被EI收录300篇；SCIh-指数28，Scopush-指数30；研究论文获1998年ASME 机构学双年度大会“最佳论文奖”（属于1990至2000 年十年中维一获奖的 4 篇最佳论文之一）和国际系统和控制工程期刊《Journal of Systems and Control Engineering》最佳杂志论文奖（2010年 PE Publishing）；被邀请为 IEEE Transactions on Robotics 副主编，Robotica 副主编，以及 ASME Transactions: Journal of Mechanisms and Robotics（机构学和机器人学最高级别杂志）副主编。

144 评论 2小时前发布

阿甘终结者

摘要以往的研究表明，一个焚化炉重金属排放的有效控制方法是使用固体吸附剂来捕捉物理气相沉积和化学吸附金属。然而，关于退休吸附剂吸附重金属可能会造成二次污染，如果他们没有得到充分的治疗。本研究的主要目的是增加热治疗中的四种重金属吸附剂对退休（铜，铅，铬，镉）的稳定。在稳定的基础是毒性特性溶出程序（TCLP）测试。评估的参数包括：（1）不同温度（900，1100和1300℃）和（2）各种加热时间（20，40和60分钟）。结果表明，大多数的浸出率增加为四有毒重金属温度降低。热处理时间不规律影响重金属的稳定，影响稍微当温度在1300 ° C的控制

335 评论 7小时前发布

美梦似路长！

一篇机械英语论文是关于高速伺服的精度跟踪控制器设计的希望有份合理通顺并准确的翻译如翻译得好还有追加分数应付的Common技术结构共鸣有是塑造，控制信号的前馈弹道命令的preﬁltering命令输入和山谷ﬁltering。在这些方法，振动衰减根据被塑造的动力学。然而，作为machine’s conﬁguration功能，频率和阻止结构方式，以及等效惯性特征，也许随着时间的推移变化并且。这些问题通过获取预定和鲁棒控制器设计被论及了。干扰例如非线性摩擦可以塑造和补偿与在前馈的合理的严紧，缓和象限小故障在行动逆转。扭矩波纹，作为马达位置和扭矩命令功能和补偿在控制器，导致不精确的扭矩交付，能也被塑造。干扰适应战略可能部分地补尝剩余的干扰，不可能通过使用模型被预言。干扰适应也提供强壮反对推进参量变异，察觉并且取消等值在适应带宽之内干扰。

286 评论 7小时前发布

机械论文英文

4个回答 默认排序 默认排序 按时间排序

相关问答

论文问答

向你推荐

热门问题

4个回答默认排序

默认排序

按时间排序