Essays about: "Rullager"

Showing result 1 - 5 of 8 essays containing the word Rullager.

  1. 1. Design of a test rig for in situ hydrogen charging of rolling element bearings under load

    University essay from Luleå tekniska universitet/Maskinelement

    Author : Oskar Moström; [2023]
    Keywords : tribology; hydrogen embrittlement; mechanical engineering; rolling element bearing; machine elements; design; mechanical design; CAD; mechanical construction; construction; material science; Tribologie; Wasserstoffversprödung; Maschinenbau; Wälzlager; Maschinenelemente; Design; Maschinenkonstruktion; CAD; mechanischer Bau; Konstruktion; Materialwissenschaft; tribologi; väteförsprödning; maskinteknik; rullningselementlager; maskinelement; design; mekanisk design; CAD; mekanisk konstruktion; konstruktion; materialvetenskap; lager;

    Abstract : This Master's thesis is part of the Hydrogen Embrittlement in Rolling element bearings project (HERo) initiated at Luleå University of Technology (LTU), with the primary objective of determining critical hydrogen concentrations in bearing steel for rolling element bearings. The specific aim of this Master's thesis is to design a test rig that enables the investigation of the effects of hydrogen embrittlement on rolling element bearings under load. READ MORE

  3. 2. Multibody modelling of the vibrations in an aircraft engine

    University essay from KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Author : Charly Mollet; [2022]
    Keywords : Vibrations; Multibody Modelling; Rolling Bearings; Rotor Dynamics; Reduction Processes; Vibrationer; multikroppsmodellering; rullingslager; rotordynamik; reducktionsprocesser;

    Abstract : During the assembly of aircraft engines, some clearance is left in the rolling bearings mainly to reduce friction. However this clearance might allow the rolling element to vibrate during flight. Indeed, unwanted vibrations called non-synchronous vibrations (NSV) appear on the data recorded by the sensors on some development engines. READ MORE

  4. 3. The Influence of Electric Currents on Performance of Grease Lubricated Rolling Element Bearings

    University essay from KTH/Maskinkonstruktion (Inst.)

    Author : Bharath Chanamolu; [2022]
    Keywords : Angular contact bearings; Bearing currents; Shaft voltages; Film thickness estimation; Electrical-capacitance method; Frictional moment measurements; Lubricant starvation; Vinkelkontaktlager; Lagerströmmar; Axelspänningar; Filmtjockleksuppskattning; Elektrisk-kapacitansmetod; Friktionsmomentmätningar; Smörjmedelsvält..;

    Abstract : The technological advancement in electrical machinery represents the need to understand the lubricant behaviour in the electrical environment. As shaft voltages are unavoidable in electrical machinery, developing new grease formulations and studying their performance against electric loads is required. READ MORE

  5. 4. Fault diagnosis of axlebox roller bearings of high speed rail vehicles based on empirical mode decomposition and machine learning

    University essay from KTH/Skolan för industriell teknik och management (ITM)

    Author : JOSUA KEHLENBACH; [2021]
    Keywords : Condition monitoring; axlebox bearings; machine learning; data fusion; Nyckelord: tillståndsövervakning; axelboxlager; maskininlärning; datafusion;

    Abstract : Axlebox bearings are one of the most critical components of a rail vehicle with regard to safety. An axlebox bearing that breaks during operation can be dangerous for the passengers and expensive for the operator. In-service failure of axlebox bearings has been the cause of many catastrophic accidents. READ MORE

  6. 5. Fretting in Wind Power Pitch Bearings: Micro-Slip Experiments and Bearing Test Rig Design

    University essay from KTH/Skolan för industriell teknik och management (ITM)

    Author : Román De La Presilla; [2020]
    Keywords : Fretting; Pitch Bearing; Lubrication.; Fretting; Rotorbladslager; Smörjning;

    Abstract : Wind power is the fastest-growing form of green energy production in Europe, today accounting for 15% of the total power demand with 100.000 turbines installed. READ MORE