Wyniki wyszukiwania - BazTech

1

Power flows in a hydrostatic-mechanical transmission of a mining locomotive during the braking process

Samorodov Vadym, Bondarenko Anatoliy, Taran Igor, Klymenko Iryna

Transport Problems

|

2020

|

T. 15, z. 3

17--28

EN

This paper considers the braking process of a mine diesel locomotive with hydrostatic mechanical transmission (HSMT) operating according to the “input differential” scheme. Braking process modeling involves four implementation methods. Identification and systematization of basic regularities in the distribution of power flows within a closed transmission contour in the process of braking have been performed with the help of software support developed by means of MatLab/Simulink. The simulation results of braking due to the hydrostatic transmission and the braking system during the movement of a diesel locomotive in the transport and traction ranges are presented in the form of graphical correlations. The process of theoretical studies of the braking process of a diesel locomotive with HSMT operating according to the “input differential” scheme has helped determine that, in terms of deceleration at the expense of a hydrostatic drive (HSD) and braking system while preserving kinematic engine-wheels connection, it is not permitted to implement this method of braking process as it is followed by excess of the allowable value of working pressure differential within HSD up to 2.8 times.

2

Analysis of hydrostatic mechanical transmission efficiency in the process of wheeled vehicle braking

Taran I., Klymenko I.

Transport Problems

|

2017

|

T. 12, z. spec.

45--56

EN

To analyze the braking process of a mine diesel locomotive with hydrostatic-mechanical transmission (HSMT), a mathematical model has been developed. In contrast to available models, this one takes into consideration rules of changes in controlling the parameters of hydrostatic drive (HSD) and implementation methods for the braking process. Moreover, the model makes it possible to study changes in kinematic parameters, power parameters, and energy parameters of HSMT under various conditions of a mine diesel locomotive operation. It has been determined that the use of HSMT operating according to the “output differential” scheme is possible, providing kinematic disconnection of the engine from the driving wheels (for emergency braking with complete stop of the diesel locomotive) or at the expense of HSD while preserving the kinematic connection between the engine and the wheels (for deceleration). Use of the braking system together with HSD or the braking system only while preserving the kinematic connection between the engine and the wheels will result in HSMT failure.

3

Active system for control of operational parameters of mine diesel locomotive drive

Dobrzaniecki P.

Czasopismo Techniczne. Mechanika

|

2015

|

Y. 112, iss. 3-M

23--33

EN

Requirements for better reliability, durability and effectiveness of the suggested means of transportation make the need of using state-of-the-art control systems and the system managing the work of the various vehicle components, such as the engine, brakes, etc. ABS, ASR, ESP and other systems are well known and widely used in the automotive industry. The traction control systems, eliminating the negative phenomena in the transient operation of driving systems are also met in rail vehicles. As there are no such solutions for narrow-gauge railway vehicles, including those used in mining plants, the system for control of operational parameters of the driving system of a mine diesel locomotive is suggested. The method for measurements of vehicle speed is indicated and use of these data in an adaptive system which adapts the operation of the driving system to the current contact conditions between wheel and rail is indicated.

PL

Rosnące wymagania odnośnie do niezawodności, trwałości i efektywności proponowanych środków transportowych powodują, że niezbędne jest stosowanie nowoczesnych systemów sterujących i zarządzających pracą poszczególnych układów pojazdu, takich jak silnik spalinowy, układ hamulcowy itp. Powszechnie znane i stosowane w motoryzacji są układy typu ABS, ASR , ESP i inne. Również w pojazdach szynowych spotyka się układy kontroli trakcji, zapobiegające niekorzystnym zjawiskom w stanach nieustalonych pracy układu napędowego. Wobec braku tego typu rozwiązań, przeznaczonych do wąskotorowych pojazdów szynowych, w tym tych stosowanych w zakładach górniczych, zaproponowano opracowanie systemu kontroli parametrów pracy układu napędowego, przeznaczonego dla górniczej lokomotywy spalinowej. Wskazano sposób realizacji pomiaru prędkości pojazdu i zaproponowano wykorzystanie tych danych w adaptacyjnym układzie dostosowującym pracę układu napędowego do aktualnych warunków współpracy koła z szyną.