I indicated in the previous Topic” “ that Escalators Basic components are as follows: • Landing Platforms. • Escalator Exterior (Balustrade). • Drive system.

Helical gears are one type of cylindrical gears with slanted tooth trace. Compared to spur gears, they have the larger contact ratio and excel in quietness and less. Cylindrical helical gears with corrected profiles. • Without centre distance variation. • With centre distance variation. ➢ Length of contact and contact radius Ra. ➢ Chordal thickness and corrected addendum. ➢ Span measurement over z' teeth. ➢ Dimension over pins and balls. The involute gear profile is the most commonly. Input Parameters Teeth type - common or spiral Gear ratio and tooth numbers Pressure angle (the angle of tool profile) α Module m (With ANSI - English units, enter tooth pitch p = π m) Unit addendum ha * Unit clearance c * Unit dedendum fillet r f * Face widths b 1, b 2 Unit worm gear correction x Worm size can be.

• Auto-Lubrication System. • Braking system. • Safety devices. • Electrical & Control Systems. And I explained the first six items in this previous topic. Today, I will explain other Escalators Basic Components as follows.

Seventh: Drive Systems Drive Systems An escalator drive system includes the following components: • Drive Machine and Gear Reducer. • The Step Drive System.

• The Handrail Drive System. The variation on how these two systems are combined is dependent upon the type of escalator. The Drive Machine used to drive the pinion gear or the main drive chain may directly or indirectly drive the Handrail Drive System. 1- Drive Machine and Gear Reducer Drive Machine and Gear Reducer A- Drive Machine. Sundowner Four One Five Two Zip Hipster more.

There are three types of drive machines: • External Drive. • Internal Drive. • Modular Drive. A.1.1 External Drive External Drive Machine is remotely located outside the truss in a different room/space or in the upper pit area. Convert Plt To Pdf Kip Pardue.

Siti Dove Trovare Keygen Music. The Drive machine is located outside the truss. The main drive machine is located in the upper pit area or in a separate machine room located below the upper section of the escalator. An external drive located in the upper pit area may employ a direct motor to gearbox drive, or a motor to gear reducer with a chain drive. An external drive escalator with the drive unit located within a machine room beneath the upper landing will normally employ a motor/gearbox with a chain drive extending to the upper landing.

A.1.2 Internal Drive Internal Drive. Machine may be located at the upper landing inside the truss between the step bands or at the top pit, and will employ a motor to gearbox drive with a direct drive axle connection. A separate dual drive machine within the step band is not uncommon with one machine used to directly drive the step chains located a few feet below the upper incline and one above the lower incline. Internal escalator drive machines may be one, two, or three drive. A dual or three-machine may power the same main drive shaft or pinion shaft at the upper incline.