The Impact of Progressive Gear Geometry on the Braking Distance Length Under Changeable Operating Conditions

The paper presents an analysis and assessment of recorded accelerations acting on Hybrid III dummy during emergency braking of a passenger lift. The dummy was equipped with a system of three-axis accelerometers. The type of progressive safety gear that has the shortest time of reaction and the shortest effective braking distance in its group, was chosen for tests. The tests were carried out on an emplacement, which simulated the movement of passenger lift. Tests of emergency braking were performed at variable load of a cabin corresponding to the mass of different passengers number. The cabin was dispelled by the gravity force using its free-fall. During the braking, the values of accelerations effected on individual parts of dummy, were measured. Based on them and using HIC and Nij indexes, the impact of temporary accelerations on passenger's health was determined.

Section: State Of the Artmentioning

confidence: 99%

Section: State Of the Artmentioning

confidence: 99%

Analysis and Assessment of Dynamic Response to Passengers During Lift Emergency Braking

Magiera

Kułaga

Wójcik

2017

“…Then, a trial is made to identify a physical model by observation using simulation and laboratory tests [7]. Analysing the values of delays received in the experiment, the impact of the guides lubrication and contamination caused by greasing agents, their significant influence on the braking distance and in consequence on the delay value can be noticed.…”

Section: Discussionmentioning

confidence: 99%

“…The results confirmed the assumptions used for the numerical calculations. In the research study [7] the authors described the pre-tests for the impact of progressive gears geometry on the braking distance length both in changing operation conditions and changing loading. The tests were performed for the progressive gears used in hoisting and hauling equipment.…”

Section: Introductionmentioning

confidence: 99%

The Impact of the Elevator Guides Contamination on the Braking Process Delay for Selected Progressive Gears

Longwic

Szydło

2017

Self Cite

The authors' tests results on the impact of the guiding system (the guides) contamination in the friction lift on the delay of progressive gears braking process are presented in this article. The tests were conducted using a free fall method and a test bench built for that purpose. In order to render all working conditions the guiding system of tested gears was lubricated with the most commonly used lubricating agents. Solid grease (SM), mineral oil (OL), the mixture of solid grease and quartz sand (S50) as well as the mixture of mineral oil and quartz sand (O50) were used.

“…• the volume of vibrations and noise coming from different lifting components such as the slides rollers [1][2][3]; • vibroinsulation methods for the lift doors power drive and the selection of vibroinsulation materials [4][5][6][7][8][9]; • measuring methods and reduction of acoustic emission in the passenger lifts cabins [10][11][12][13].…”

Section: Mainly It Referred Tomentioning

confidence: 99%

Analysis of Vibroacoustic Signals Recorded in the Passenger Lift Cabin

Szydło¹,

Maciąg²,

Longwic³

et al. 2016

Self Cite

The analysis of private tests is presented in the article. The applicable tests refer to accelerations, the level of the sound pressure as well as to the sound power emitted by the passenger lift cabin at different technical conditions of the lift. For a group of lifting devices the accelerations were tested at three axes with the use of an accelerometer. The accelerometer was placed in the central part of the cabin with simultaneous measurement of the acoustic parameters with the sound analyzer equipped with sound volume double microphone probe. An attempt was made to determine the impact of the frame -cabin system construction as well as the lift's technical condition on the recorded parameters. It can allow to establish the limit values of the lift structure parameters under which a rapid drop of comfort takes place, while travelling in the lift as well as to indicate those construction elements the modification of which would affect the improvement of the operation noiselessness.