Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: hydraulic device

Sortuj według:

Ogranicz wyniki do:

Experimental testing of the influence of the operating loading on the flow characteristics of hydraulic pump

Kosiba Ján, Tkáč Zdenko, Jablonický Juraj, Shcherbak Valeriia, Ganushchak-Yefimenko Liudmyla, Paumer Martin, Bukoros Tetiana, Čurgaliová Gabriela, Zachar Martin

Eksploatacja i Niezawodność

2022

Vol. 24, no. 3

583--589

The contribution deals with the influence of the operating loading on the flow characteristics of the hydraulic pump under laboratory conditions. In the test, a new toothed hydraulic pump and hydraulic oil with kinematic viscosity at 40°C, ν = 64.2 mm2.s-1 were used. The operational loading was measured during the most difficult agrotechnical operation – ploughing, at which the loading of the hydraulic pump is the greatest. Laboratory testing was determined for 200 hours, and the flow characteristics had been detected at 50 hours intervals. Measurement of the flow characteristics was performed at rated speed n = 1,000 rpm. Measurement of the flow characteristics was carried out in dependence on the loading pressure from p = 0 MPa to p = 20 MPa. When p = 0 MPa, the value reached n = 91.70% and when p = 20 MPa, n = 86.68%. Running-in of the hydraulic pump lasted 150 hours, with an increase of the flow characteristics Δηvol = 1.36% (p = 10 MPa) compared to the initial state. After working for 200 hours, the flow rate of the hydraulic pump decreases compared to 150 hours.

Koncepcja rozruchu hydraulicznego silników spalinowych samochodów ciężarowych

Boczula M., Kołodziejski S., Sawczuk W.

Logistyka

2015

nr 3

496--505, CD 1

Istnieje wiele metod rozruchu silników spalinowych z czego najpopularniejszy jest rozruch elektryczny. Akumulator wykorzystywany jako źródło energii stanowi duże zagrożenie dla środowiska naturalnego. W celu ograniczenia niebezpieczeństwa możliwe jest zastosowanie rozruchu hydraulicznego, który wykorzystuje energię wysokiego ciśnienia cieczy roboczej. W Polsce powstało kilka koncepcji rozruchu hydraulicznego dla maszyn górniczych, które nie zostały poparte obliczeniami. Celem artykułu jest przedstawienie koncepcji rozruchu hydraulicznego silników samochodów ciężarowych, które posiadają instalację hydrauliczną typu HDS. Ponadto pokazanie układu hydraulicznego wraz z określeniem kosztów instalacji hydraulicznej.

There are many methods of internal combustion engines starting with the most popular of which is the electric start. The battery used as a source of energy is a major threat to the environment. In order to reduce the danger of possible to use a hydraulic start-up, which utilizes the energy of high pressure fluid. In Poland, there were a few concepts for hydraulic start-up of mining machines that are not supported by calculations. The purpose of this article is to present the hydraulic start-up concept of internal combustion engines in truck, which have a hydraulic installation. In addition, presentation of hydraulic system and determine the cost of the hydraulic system.

The modelling methods of hydraulic devices using Matlab/Simulink software

Klarecki K.

Selected Engineering Problems

2012

nr 3

103--106

In this paper two methods of modelling of hydraulic units were presented. Both in Matlab/Simulink software were realized. First on numerical solving of state equations was based, second - on the using of the elements from specialized library. These method were compared due to the laborious, the accuracy of their results and the possibility of adjusting of model parameters.