Wednesday, 29 January 2020
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New modules and changes in the Elevator Portal

With the Elevator Portal of the Liwitec GmbH it is now possible also to calculate the bending drill buckling of the guide rails using the FEM.

(Photo: © Liwitec GmbH)

As a result, general statements regarding the bending crinkle, under tare weight and additional weights, can already be made in the construction phase. As a result, considerable unnecessary costs can be avoided.

Technical calculations, additional functions and tools

The Online Portal is a database-driven system, available at anytime and anywhere and being permanently updated by our experts. It supports in planning, configuration, selection and calculation of entire elevator systems or its main components by using product and system configurator and executing technical calculations.

The CompuLift module is the centre piece of the portal and a calculation program for the following technical calculations, additional functions and tools:

Technical calculations
– Cars/Cabins: Surface inspection
– Lifting Cylinder: Cylinder, cylinder bottom/piston
– Ropes: Rope reliability calculation for steel ropes, plastic covered ropes and Polyrope
– Traction Sheaves: Calculation of the driving ability and optionally the surface pressure
– Radial Load: Verification of the permissible radial load
– Pullies/Axles: Calculation of the axles and bearing durability
– Beams: Calculation of the pulley carriers or general carriers for deflection and permissible bending stress
– Guide Rails: For central, eccentric, L-frame and diagonal guided lifts, including earthquake standard EN 81-77 and / or additional load on the rails
– Supports: Calculation of buffer/cylinder supports for buckling
– Buffer: Selection of permitted buffers for normal buffers and service support buffers
– Overspeed Governors: Review of the resulting clamping force and calculation of the rope safety for governor ropes
Optional: Stopping Distance Calculation (UCM): Checks the unintended movement of the car in up and down movements of the specified distances

– High Frame Calculation: Tool for calculating the wrap angle or the axles distance by known wrap angle
– Tension Weight Calculation: Calculation of the resulting clamping force
– Profile Calculation: Tool for configuration sheet metal profiles that can be used in the calculation for supports and beams
– Shaft Calculation: Simplified shaft calculation for flying / bilateral traction sheaves
– Center of Gravity of car: Calculation of the car‘s centre of gravity by entering the individual components and associated coordinates
– Safety Gear Calculation: Total permissible weight check in ± 7.5% range (for modernization)
– Bearing Durability: Calculation of the bearing durability for rolling bearings of rope pullies

Additional Functions
– Module Item List: Output of a list of parts of the calculated components and accessories
– Module Railplan: Review of a collision between connectors and brackets
– Module Force Diagram: Automatic output of all forces in the pit and shaft wall
– Module Shaft Sketch: Simplified sketch for the shaft cross-section
– Counterweight Fillers Selection: Interpretation of the counterweight based on a maximum filling height and the distance between the rails
– Screw Calculation: Simplified calculation for transverse loads or tensile load of screws
All calculations are carried out according to the standards EN 81-20, EN 81-50, EN 81-1, EN 81-2 and EN 81-77.

The Elevator Portal with its modular structure offers several benefits:
– Customized: selectable modules depending on your necessities
– Safe: security through annual validation by German TÜV
– Automatic: automatic plausibility checks of the selection after changes
– Time saving: saves time in the planning process through immediate validation and traceability
– Direct: direct paperless transfer to Notified Bodies
– Training: personal on-site trainings with an expert is possible
– Test subscription: temporary nonbinding account for free

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