多馬達(dá)驅(qū)動機(jī)械外文翻譯-文庫吧
2025-04-17 04:24 本頁面
【正文】 improve the electrical and mechanical efficiency and thus also reduces the energy consumption. The use of polyphase alternating current squirrelcage motors of variable frequency and their associated control has the advantage that high torques can be produced at low rotational speeds. 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 acpanying 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 flangemounted on a main gear transversely to the direction of travel of the escalator。 FIG. 3 shows the drive with drive units flangemounted on a main gear longitudinally of the direction of travel of the escalator。 FIG. 4 shows a threedimensional illustration of the drive arrangement according to FIG. 2。 FIG. 5 shows a threedimensional 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 ponents. 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 visible. FIG. 2 shows the details of a drive, which is installed within a carrying structure 9 at the upper end 2 of the escalator 1. Three identically constructed drive units 7 drive a toothed main drive wheel 6 by way of an output gearwheel and an intermediate gearwheel 21, and are arranged and distributed about the circumference of the main drive wheel 6. The main drive wheel 6, together with a stair chain wheel 5, are fastened on the main shaft 4 of the drive. The drive units 7 are firmly connected to a main gear housing 8 at three planar flangeconnecting openings 24 formed for this purpose. When less than three drive units 7 are needed, the unused flangeconnecting opening 24 may be closed by a cover and the associated intermediate gearwheel 21 is not inserted. With this construction, the same main gear housing 8 can always be used for one, two or three needed drive units 7. 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 room. As example of a variant, FIG. 3 shows an arrangement of the drive units 7 parallel to the direction of movement of the escalator 1. In this manner of arrangement, the drive units 7 additionally prise a bevel gear . Motor , clutch , brake , flywheel and the output gearwheel , which are otherwise constructionally identical with and incorporated in the drive units 7 of FIG. 2, are present for each drive unit 7. The main gear housing 8 is likewise always the same for one, two or three drive units 7 and unused flangeconnecting openings 24 can likewise be covered by a cover. FIG. 4 is a spatial illustration of the drive according to FIG. 2 within the carrying structure 9 of the escalator 1. Two stair elements 22 are illustrated in addition to the elements shown in th
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鄂ICP備17016276號-1