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Konceptgenerering av hissbroms till Alimak Hek AB
2014 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

The background to this work is that today there are no guidelines for devices that prevent a so-called UCM (Unintended Car Movement) for permanent elevators at landings. If a driveshaft breaks or overloading of the lift occurs the elevator could be set in motion with doors open. If that happens injuries may occur. The upcoming lift standard EN 81-20 states that there must be means available to prevent or stop unintended car movement from landings with the elevator doors unlocked. The device must detect unintended movement of the elevator, and shall stop the elevator and keep it stationary. This should be achieved without the need of help from any existing elevator component that during normal operation controls the speed or deceleration of the elevator (European committee for standardization, 2014).The purpose of this work is to develop a concept of a brake to prevent a UCM for Alimak Hek’s single engine SE-elevators. During this project a number of brake concept was made then analyzed and evaluated based on the new requirements of EN 81-20. This result presents a brake that has been selected through an evaluation matrix based on the new requirements and relevant factors. The brake uses a gear rack which is inserted in the rack on lift mast for locking the elevator at the landing. The movement of the gear rack is managed by two spring-loaded shafts that push the gear rack into the mast gear rack, see Figure 1. The locking of the gear rack in mode B is made possible with a vertical sliding motion of the rack on the brake, locking it in that position. Return movement of the gear segment from the gear rack is made by means of an actuator.

Place, publisher, year, edition, pages
2014.
Keyword [en]
Technology
Keyword [sv]
Teknik, Hissbroms, broms, Alimak
Identifiers
URN: urn:nbn:se:ltu:diva-55684Local ID: c86aff7a-440d-46c6-a0b1-080061c2915bOAI: oai:DiVA.org:ltu-55684DiVA: diva2:1029068
External cooperation
Subject / course
Student thesis, at least 15 credits
Educational program
Mechanical Engineering, bachelor's level
Supervisors
Examiners
Note
Validerat; 20140928 (global_studentproject_submitter)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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