A Model‐Based Unloaded Test Method for Analysis of Braking Capacity of Elevator Brake

Abstract

In order to improve the inspection efficiency and accuracy of the braking capacity of the elevator brake being used, a novel method for analyzing the full-loaded braking performance by using the unloaded braking performance is proposed, and a set of methods for measuring the braking torque is designed. Based on the analysis of the key factors that affect the mechanical performance of the elevator brake, the calculation model of the braking torque in the process of the emergency braking with the traction ratio of 2 : 1 is established, and the relationship between the braking torque and acceleration under different working conditions is analyzed. It is shown that, for the model assumed, the emergency braking torque is 1.56 times that of the static braking torque under 1.25 times the rated load. The braking torque increases linearly with the increase of braking acceleration. An elevator model being used is tested and calculated. The experimental results show that the braking acceleration measured by the experiment is 11.95% less than the theoretical value. And the analysis shows that, comparing with the traditional test method, the braking torque test method designed in this paper is more accurate and safe.

Study on Theoretical Model and Test Method of Vertical Vibration of Elevator Traction System

“…(1) Measure the diameter of the traction wheel, the diameter of the wire rope, and the mass of the cage and counterweight (2) Arrange the vibration testing instrument on the top of the car [15], the parameters of the test instruments and sensors used are shown in Table 2, and the position and fixing of the acceleration sensor are shown in Figure 4 condition.…”

“…Poul analyzed the influence of load on effective braking distance and descending speed during emergency braking and gave the calculation results [14]. Peng et al studied a test method of no-load elevator braking torque and gave a method to predict full-load braking capacity based on noload test results [15]. Longwic and Szydło introduced the test results of the influence of guide rail pollution on the braking delay of the progressive gear in the friction lift.…”

Research on measuring device and quantifiable risk assessment method based on FMEA of escalator brake

“…It not only has a large cumulative error, but also not accurate for the acquisition of the braking action. 42,43 To solve the above problems, this paper proposed a non-contact test method based on infrared technology. It does not have to calculate any intermediate quantity.…”

Case Study of Support Frame Optimization Using a Distant Load

“…They offered optimized profiles in terms of dimensions while maintaining the appropriate value of slips. In addition, the FEM method is used to determine torsional flexural buckling in steel columns, expanded in [12], and to analyse the braking system of the friction crane described in [13]. The authors in [14,15] present the operation of safety gears as a result of changing operating conditions and based on experimental studies carried out wavelet analysis of the results obtained.…”