Кафедра "Підйомно-транспортні машини і обладнання"

Постійне посилання колекціїhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/3845

Офіційний сайт кафедри http://web.kpi.kharkov.ua/ltm

Кафедра "Підйомно-транспортні машини і обладнання" заснована у 1929 році. Першим її очільником став професор Тамарін Д. Н.

Курс "Теорія і будова підйомних машин" в Харківському практичному технологічному інституті викладався ще з 1888 року Вадимом Ерастовичем Тіром.

Кафедра входить до складу Навчально-наукового інституту механічної інженерії і транспорту Національного технічного університету "Харківський політехнічний інститут".

У складі науково-педагогічного колективу кафедри працюють 7 кандидатів технічних наук, з них 5 мають звання доцента.

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Crane wheels production quality control
(University of Miskolc, 2014) Grigorov, Otto; Gubskiy, Serhy; Okun, Anton
Quality control of crane wheels is an important part for support of crane mechanisms permanent operation. Normal functioning of logistics systems requires preventing of crane downtimes and delays. The research results of the impact of the crane wheels (710 mm diameter, 65Г steel) surface hardness on coercivity indicators are presented in this paper. Obtained research results of dependence between the coercivity indicators and the crane wheels rolling surface hardness for their use in practice are described. The influence of the crane wheels surface hardness on the coercivity indicators is researched. Research has shown the dependence of the coercive force from the regulatory crane wheels rolling surface hardness, which is received after a quenching. This research allows you to use obtained results for a quality control of the crane wheels quenching in the production process, a rapid control of the crane wheels at the expert examination.
An experimental study of the efficiency of optimal control for lifting machines
(University politehnica of Bucharest, 2019) Grigorov, Otto; Strizhak, Vsevolod; Strizhak, Marjana; Okun, Anton; Anishchenko, Galina
The article is devoted to the synthesis of optimal speed performance control, in which the Pontryagin maximum principle and the phase-plane method are used to search for switching points of the relay control function. A crane trolley model and computer control system, able to implement the automatic movement of the trolley according to the optimal laws, were developed. The conducted experimental study allowed us to establish that the operating cycle of the traveling mechanism can be reduced by 1.5-3.1 times using optimal speed performance control.
Motion of cranes of bridge type simulation in the MS Excel environment
(University of Miskolc, 2014) Grigorov, Otto; Stepochkina, Olga
The idle times of the crane caused by need of replacement of wheels, can have critical value for functioning of a logistic chain. In article the task about the movement of the crane with a skew with the accounting of several mutually influencing processes having various nature is considered. The solution of this task has important applied value for increase in a resource of wheels. For the crane designs, more varied, a known problem is representation of results in a suitable form for engineering calculations, as a compromise between simplicity and quality of the results. Possible solution is modelling in the environment of MS Excel. This approach allows the best way to provide the necessary engineering calculations for simplicity, clarity and reliability of the submission and processing of a large number of heterogeneous data. As an example, modelling of an elastic skeleton of the crane in dynamics that represents complexity in view of lack of specialized mathematical apparatus is considered.
Remote control of hydrostatic drive mechanisms for hoisting machinery and logistics centers
(University "Politehnica" of Bucharest, 2015) Grigorov, Otto; Stryzhak, Vsevolod; Ziubanova, Daria
The analysis of the crane or loader travel mechanism construction with hydrostatic drive and low-moment hydraulic motor has been performed. It has been proposed that the electric circuit of pump performance remote control system that meets the requirements applicable to the crane drives control system. The zero-setter design has been developed for hydraulic drive emergency braking in case of an emergency, while the bridge runover on the obstacle when travel limit switches of the traveling mechanism triggered , and also the electric drive motor of the pump and electric control scheme of pump productivity loses power. The hydraulic circuit of the lifting machines mechanism is presented and its operating principle is described. Implementation and testing of remote control system elements are implemented on the travel mechanism experimental stand of the crane with a lifting capacity of 32/5 t that is described in the article.The stand design allows to provide long-term trials in a wide range of static and dynamic loads, to realize implement typical operation cycles and to record the nature of dynamic loads and energy consumption. In consequence of the research it was proved that hydrostatic drive with low-moment hydraulic drive and described remote control system has deep adjustable speed for a given program, softens dynamic load transients, and saves a significant amount of power during acceleration and braking.