Mathematical model of form machining of the convexo-concave Novikov gear teeth

Article presents mathematical model of form machining of cylindrical convexo-concave Novikov gear teeth by means of disk-type tools. Example of these king of tools is disk-type milling cutter or grinding wheel. Moreover based on the given convex and concave tooth geometry the tool profile has been established

MATHEMATICAL MODEL OF FORM MACHINING OF THE CONVEXO-CONCAVE NOVIKOV GEAR TEETH

Article presents mathematical model of form machining of cylindrical convexo-concave Novikov gear teeth by means of disk-type tools. Example of these king of tools is disk-type milling cutter or grinding wheel. Moreover based on the given convex and concave tooth geometry the tool profile has been established

INFLUENCE OF NOVIKOV CONVEXO-CONCAVE GEAR PARAMETERS ON CONTACT PATTERN

Thesis presents the results of simulations, aiming at examining the influence of chosen Novikov gear parameters on its contact region. The parameters which influence have been established include the overlap ratio, ratio of radius of teeth profiles, ratio of convex tooth profile radius to pitch radius, normal pressure angle, translation of convex tooth profile along the contact line and axes distance error. Knowledge of the influence of gear parameters on its contact pattern enable to efficient establishing these parameters, which allows to compensate assembly errors or edge contact

Influence of Novikov convexo-concave gear parameters on contact pattern

Thesis presents the results of simulations, aiming at examining the influence of chosen Novikov gear parameters on its contact region. The parameters which influence have been established include the overlap ratio, ratio of radius of teeth profiles, ratio of convex tooth profile radius to pitch radius, normal pressure angle, translation of convex tooth profile along the contact line and axes distance error. Knowledge of the influence of gear parameters on its contact pattern enable to efficient establishing these parameters, which allows to compensate assembly errors or edge contact

ANALYTICAL AND NUMERICAL METHODS TO OBTAIN CONTACT PATTERN OF CONVEXO-CONCAVE NOVIKOV GEARING

Article presents analytical and numerical methods to obtain contact pattern of convexo-concave Novikov gearing. Two TCA (tooth contact analysis) methods were given wchich are based on equations of differential geometry. Difference between both of methods reveals in measurement of gap between the working teeth. Algorithms with their example results for presented methods were given. Moreover comparative analysis for application both of methods in Novikov gearing analysis were given

Stress assessment of gear teeth in epicyclic gear train for radial sedimentation tank

The paper presents the strength evaluation of planetary gear teeth designed for a radial sedimentation tank drive. A novel type of gear drive, composed of a closed epicyclic gear train and an open gear train with internal cycloidal gear mesh is proposed. Contact stress and root stress in the planetary gear train were determined by the finite element method and according to ISO 6336. The influence of the mesh load factor at planet gears on stress values was also established. A comparison of the results followed. It was observed that the mesh load factor on satellites depends mainly on the way the satellites and central wheels are mounted, the positioning accuracy in the carrier and the accuracy of teeth. Subsequently, a material was selected for the particular design of planetary gear and the assumed load. The analysis of the obtained results allowed assuming that in case of gears in class 7 and the rigid mounting of satellites and central wheels, gears should be made of steel for carburizing and hardening. In case of flexible satellites or flexible couplings in the central wheels and gears in class 4, gears can be made of nitriding steel

Stress Assessment of Gear Teeth in Epicyclic Gear Train for Radial Sedimentation Tank

The paper presents the strength evaluation of planetary gear teeth designed for a radial sedimentation tank drive. A novel type of gear drive, composed of a closed epicyclic gear train and an open gear train with internal cycloidal gear mesh is proposed. Contact stress and root stress in the planetary gear train were determined by the finite element method and according to ISO 6336. The influence of the mesh load factor at planet gears on stress values was also established. A comparison of the results followed. It was observed that the mesh load factor on satellites depends mainly on the way the satellites and central wheels are mounted, the positioning accuracy in the carrier and the accuracy of teeth. Subsequently, a material was selected for the particular design of planetary gear and the assumed load. The analysis of the obtained results allowed assuming that in case of gears in class 7 and the rigid mounting of satellites and central wheels, gears should be made of steel for carburizing and hardening. In case of flexible satellites or flexible couplings in the central wheels and gears in class 4, gears can be made of nitriding steel

A Distributed Data Acquisition System for the Sensor Network of the TAWARA_RTM Project

This paper describes a distributed Data Acquisition System (DAQ) developed for the TAWARA-RTM project (TAp WAter RAdioactivity Real Time Monitor). The aim is detecting the presence of radioactive contaminants in drinking water; in order to prevent deliberate or accidental threats. Employing a set of detectors, it is possible to detect alpha, beta and gamma radiations, from emitters dissolved in water. The Sensor Network (SN) consists of several heterogeneous nodes controlled by a centralized server. The SN cyber-security is guaranteed in order to protect it from external intrusions and malicious acts. The nodes were installed in different locations, along the water treatment processes, in the waterworks plant supplying the aqueduct of Warsaw, Poland. Embedded computers control the simpler nodes, and are directly connected to the SN. Local-PCs (LPCs) control the more complex nodes that consist signal digitizers acquiring data from several detectors. The DAQ in the LPC is split in several processes communicating with sockets in a local sub-network. Each process is dedicated to a very simple task (e.g. data acquisition, data analysis, hydraulics management) in order to have a flexible and fault-tolerant system. The main SN and the local DAQ networks are separated by data routers to ensure the cyber-security

Gamma spectrometer based on CeBr3 scintillator with Compton suppression for identification of trace activities in water

The performance of a spectrometry system (SPEC) for identification of trace activities in water is presented. The SPEC detector is a part of the TAWARA-RTM platform designed for monitoring of water processed for distribution by the Waterworks Company. The SPEC system is dedicated for identification of radioisotopes emitting \u3b3-rays of energies between 50 keV and 2 MeV. The SPEC detector comprises a CeBr3 scintillator grown from specially purified raw material with reduced content of actinides that produce unwanted alpha particle background. In order to reduce the Compton scattering background, an active anti-Compton shield (ACS) made of BGO is used. In addition, a passive lead shield around the ACS is used for further suppression of the external background. The SPEC detector is designed for use with a dedicated concentrator system, that will be used for absorption of a selected group of radioactive elements that may be present in water processed at the waterworks. The system is tested upon capability to detect the \u3b3-ray emitters with activity according to the guidance levels published by the EU in the Council Directive. \ua9 2015 IEEE