Vol 6, No 4 (2020): 28.12.2020
- Year: 2020
- Published: 28.12.2020
- Articles: 5
- URL: https://dynvibro.ru/dynvibro/issue/view/483
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Description:
опубликован 28.12.2020 г.
Full Issue
Articles
EFFECT OF RADIAL FORCE ON BALL BEARING STIFFNESS FACTOR UNDER CONDITIONS OF RING SKEW
Abstract
Results of ball bearing rings skew effect on radial stiffness factor are pre-sented in the paper. The effect of radial load on stiffness factor at change of angles of rings skew was evaluated. Significant influence of bearing rings skew on stiffness factor at small radial load values is noted.
6-10
CALCULATION OF DAMPERS OF LOW-FREQUENCY ACOUSTIC FILTERS TYPE
Abstract
The article provides analytical dependencies that allowing harmonization the required dynamic characteristics of fluid pressure pulsation dampers with the parameters of their main elements at the given level of hydraulic losses on the devices.
11-17
EXPERIMENTAL STUDY OF THE PERFORMANCE OF "DRY" SEALS IN THE PRESENCE OF ROTOR VIBRATION
Abstract
The article presents the results of an experimental study of "dry" seals in the presence of rotary vibration. The descrip-tion of the dynamic stand measurement system is given. An assessment of the influence of vibration loads on leakage through the seal and an analysis of the influence of radial displacement and shaft misalignment on the operation of a "dry" seal are carried out. The analysis of the cause of the vibration defect is presented. The permissible values of the vibration amplitudes of the rotor of the gas pumping unit have been determined.
18-24
NUMERICAL SIMULATION OF THE SWIRLED FLOW OF WATER STEAM PLASMA WITH ALUMINUM MICROPARTICLES
Abstract
A study of the discharge plasma with a vortex flow of an argon + water vapor mixture with aluminum particles in a tube of a plasma vortex reactor (PVR) was carried out. The parameters of the discharge, plasma, and working flow in the PVR have been measured. Spectral methods were used to estimate the electron temperature, rotational and vibrational temperatures of excited molecular complexes, the temperature of metal clusters, and the electron density of plasma. A kinetic scheme is proposed for calculating the operating modes in a reactor using a water vapor discharge with aluminum particles. Numerical simulation of a vortex flow of pure water vapor with aluminum particles in the presence of a heating source is carried out.
25-34
STUDY OF FUNDAMENTAL MACROSCOPIC CHARACTERISTICS OF TRAFFIC FLOWS BY WAVELET ANALYSIS OF AUDIO SIGNALS
Abstract
The paper proposes an approach to the study of the traffic flow characteristics by wavelet analysis of audio signals, which makes it possible to build fundamental macroscopic models of traffic flows with the possibility of dividing by types of vehicles.
35-39