Wyniki wyszukiwania - BazTech

1

Evaluation of weight wear of disc brake pads after test stands

Sawczuk Wojciech, Rilo Cañás Armando-Miguel, Kołodziejski Sławomir

Pojazdy Szynowe

|

2022

|

Nr 3-4

53--59

EN

The article presents the results of the research of a railway disc brake in the evaluation of the weight wear of friction pads. The tests were carried out on a certified brake stand where the friction and mechanical characteristics of the brake are determined. The stand was additionally equipped with a thermal imaging camera to observe the contact of the pads with the brake disc. Attention was also paid to examining the influence of such parameters of the braking process as the contact surface of the pad with the disc, the thickness of the pads as a determinant of their initial wear, the pressure of the pads to the disc, braking mass and braking speed on the weight wear of the friction pads.

2

New approach to brake pad wear modelling based on test stand friction-mechanical investigations

Sawczuk Wojciech, Merkisz-Guranowska Agnieszka, Rilo Cañás Armando-Miguel, Kołodziejski Sławomir

Eksploatacja i Niezawodność

|

2022

|

Vol. 24, no. 3

419--426

EN

The paper presents the results of investigations of a railway disc brake system related to the mass wear of its brake pads. The tests were carried out on a certified brake stand designed to determine the friction-mechanical characteristics of the brakes. The test stand was additionally equipped with a thermographic camera to observe the contact points of the brake pads with the disc. Particular attention was drawn to investigating the impact on the mass wear of the brake pads of such parameters of the braking process as contact surface of the brake pad with the rotor, thickness of the brake pads as the indicator of their initial wear, clamping force of the pads against the rotor, rail vehicle mass to be decelerated, and speed, at which the deceleration begins. The scientific aim of the paper is to present the relations between the mass wear of the brake pads and the quantities that characterize the braking process. A regression model was determined to estimate the wear of the brake pads based on a single braking process with the preset input quantities.

3

Assessment of disc brake vibration in rail vehicle operation on the basis of brake stand

Sawczuk Wojciech, Merkisz-Guranowska Agnieszka, Rilo Cañás Armando-Miguel

Eksploatacja i Niezawodność

|

2021

|

Vol. 23, no. 2

221--230

EN

The scientific aim of the article is to present the relationship between the vibroacoustic signals of the right and left friction pad during braking, depending on the mass distribution, as an element of the lever system. This article presents the results of tests of a railway disc brake in the scope of vibrations generated by pads in various states of wear located on both sides of the brake disc. The tests were carried out on the brake stand using the vibroacoustic method including the analysis of amplitudes and frequencies and the thermal imaging method. Special attention was paid to the analysis of the classic lever mechanism as a multimass system influencing the thermo-mechanical characteristics and vibrations of the pads on the right and left side of the brake disc. Uneven mass distribution of the system translates into uneven wear of the friction components. The scientific aim of this paper is to present the relation between vibroacoustic signals of the right and left friction pad during braking depending on the mass distribution of the lever system component.