Multidimensional Data Interpretation of Vibration Signals Registered in Different Locations for System Condition Monitoring of a Three-Stage Gear Transmission Operating under Difficult Conditions

This article provides a discussion of the results of studies on the original system condition monitoring of a three-stage transmission with a bevel–cylindrical–planetary configuration installed in an experimental scraper conveyor. Due to the high vibroactivity of gear transmissions operating under the impact of a scraper conveyor’s chain drive, these unwanted effects of machine operating vibrations were assumed to be applied. For purposes of the study, vibrations were measured on the driving transmission housing in an idling scraper conveyor. The main purpose of the study was to establish the frequencies characteristic of the gear transmission, and to determine whether it was possible to run vibroacoustic diagnostics of the same transmission under conditions with a considerable impact of the conveyor chain. An additional cognitively significant research goal was the analysis of the dependence of the diagnostic utility of the signal depending on the sensor mounting point. Five different locations of three-axis sensors oriented to the next stages and various types of gears were determined, as well as places characterized by high spatial accessibility, which are often selected as places for measuring the vibration of gears. Using MATLAB software, a program was written that was calibrated and adapted to the specifics of the measuring equipment based on the collected test results. As a result, it was possible to obtain a multidimensional data interpretation of vibration signals of system condition monitoring of a three-stage gear transmission operating under difficult conditions. The results were based on signals registered on the real three-stage gear transmission operating under the impact of a scraper conveyor’s chain drive.

Calculation of the chain drum with elastic fingers of potato harvesting machines

In agricultural machines, chain transmission is widely used, the main advantage of which is a high load capacity. Therefore, in this article, the methodology for calculating chain drives in mechanical drives of agricultural machinery, namely in mechanical drives of potato harvesters, is presented. As a result of experimental and theoretical studies, the availability and safety margin of the selected chain drive of a loosening drum with elastic fingers of a potato harvesting machine was confirmed. In potato-harvesting machines, the movement of the executive working bodies is carried out. Analysis of the design of domestic and foreign potato harvesters showed that it is possible to obtain a good quality of potato harvesting in difficult soil and climatic conditions due to the use of machines of a simpler design with a mesh number of working bodies, but at the same time with their rational layout, the correct choice of transmission drives and ensured optimal modes work. The advantage of these transmissions is their large load capacity and the ability to work under dynamic loads. Therefore, in these investigations, the works are analyzed and the theoretical foundations and methods for calculating the working capacity of the wearable chain and the margin of strength of the chain transmission for dynamic loads are presented. As a result of the experimental theoretical research, the reliability of the working capacity and the strength reserve of the selected chain drive of the drum with elastic pulleys of the potato harvester is supported.

Design and Fabrication of Chainless Bicycle

Today's life we meet number of difficulties in transportation. There are number of drives to transmit the power. We have concentrated on bicycle where the efforts while peddling is not efficiently turned to work. In bicycle chain drive is used. Due to the chain drive there is loss of power in transmission. So our idea is to replace chain drive by kinematic links for higher transmission. This project is developed for the users to rotate the back wheel of a bicycle using kinematic links. Power transmission through chain drive is the oldest and widest used method in case of bicycle. In this paper we implemented the chain less transmission to the bicycle to overcome the various disadvantages of chain drive. Recently, due to advancements in kinematic link technology, a small number of modern link-driven bicycles have been introduced. Usually in bicycle, chain and sprocket method is used to drive the back wheel. The link drive only needs in small amount of lubrication using a grease to keep the links running quiet and smooth. A link drive bicycle is a bicycle that uses a link drive instead of a chain which contain four set of link at both the ends to make a new kind of transmission system for bicycle for getting high reliability system, and more safe system. Link-driven bicycle have used four bar mechanism where a conventional bicycle connected in one end pedal link and another connected in wheel. This pedal link actuate to drive a wheel. The use pedals to be actuate in 45 degrees wheels can rotating at 180 degrees. According to the direction of motion of pedal, the wheel will be moved forward. This avoids the usage of chain and sprocket method. This “chinless” drive system provides smooth quite and efficient transfer of energy from the pedals to the rear wheel. It is attractive in look compare with chain driven bicycle. Keywords: Chainless bicycle, four bar mechanism, kinematic link technology.

Modeling and Finite Element Analysis of Chain Drive using Different Materials

In any automobile the power is transmitted from one shaft to another by using chain drive. Chain drive consists of chain, driving sprocket and driven sprocket. The driving sprocket is connected to engine output shaft, which transfer power to driven sprocket by chain. Further this driven sprocket transfer power to drive shaft. The design and material selection of this chain drive plays a vital role in efficient running of the automobile. Present the material used for chain drive is mild steel. This paper involves increases the strength of the Pulsar 180cc chain drive by selecting the different materials (AISI 1050 steel, EN 8 steel, EN 32 steel, EN 19 steel and C45 steel). In this the Pulsar 180cc chain drive designed through reverse engineering approach and detailed finite element analysis is carried out to calculate stresses and deflections on the chain drive. Later the analysis is extended to fatigue analysis to estimate the life of the chain drive and the dynamic analysis is carried out to calculate stresses and deflections on the chain drive when it is in motion. SOLID WORKS software is used for doing 3D model of chain drive and ANSYS is used for doing finite element analysis.

Optimized Design of Mechanical Chain Drive Based on a Wireless Sensor Network Data Algorithm

In this paper, we use a wireless sensor network data algorithm to optimize the design of mechanical chain drive by conducting an in-depth study of the mechanical chain drive optimization. We utilize the crowdsourcing feature of the swarm-wise sensing network for assisted wireless sensor networking to achieve crowdsourcing-assisted localization. We consider a framework for crowdsourcing-assisted GPS localization of wireless sensor networks and propose two recruitment participant optimization objectives, namely, minimum participants and time efficiency, respectively. A model and theoretical basis are provided for the subsequent trusted data-driven participant selection problem in swarm-wise sensing networks. The sprocket-chain engagement frequency has the greatest influence on the horizontal bending-vertical bending composite in different terrain conditions. The dynamic characteristics under working conditions are most influenced, while the scraping of the scraper and the central groove significantly influenced horizontal bending and vertical bending. Under load conditions, the amplitude of the scraper and central groove scraping increases significantly, which harm the dynamics of the scraper conveyor. By monitoring the speed difference between the head and tail sprockets and the overhang of the scraper, the tensioning status of the scraper conveyor chain can be effectively monitored to avoid chain jamming and chain breakage caused by the loose chain, thus improving the reliability and stability of the scraper conveyor.

Research of the problem of optimization and development of a calculation method for two-stage chain drives used in heavy industrial vehicles in conditions of economic efficiency

The article is dedicated to the problem of optimization of chain drives of the drilling unit. At present, increasing the power per machine to the optimal limits, reducing the material and energy consumption per unit capacity of the machine, as well as operating costs are considered topical issues. The machines that are designed and constructed to optimal limits must be very powerful and productive. The machines that are applied to perform drilling works in the oil and gas industry must be easy to operate, reliable and have ability to operate for a long time. When constructing such machines, their being lightweight, economical, as well as their preparation in a short time and at low cost should be taken into account in advance. In order to ensure the reliable operation of drilling rigs, it is more expedient to apply chain drive in their mechanical transmission. First of all, the application of chain drive in drilling units and hoisting mechanisms is considered. Then a calculation method was developed for the chain drives of the drilling unit used in deep exploration wells and the exploitation of wells, and, accordingly, the calculation of the chain drive was carried out. The chain drive consists of drive and driven sprockets and a chain that encompasses the sprockets and engages in their teeth. Chain drives with several driven sprockets are also used. In addition to the basic listed elements, chain drives include tensioners, lubricating device and guards. The chain consists of hinged links that provide mobility or “flexibility” of the chain. Chain drives can be performed in a wide range of parameters. The calculation took into account the quality of the material, the service life and durability of the chain drive construction

Design and Development of Lanyard Printing Machine

A Lanyard is an essential part of preparing any company or Organization’s office supplies or stationery. As an ID card holder, Lanyard provides identity and respectability to different organizations. While a simple lanyard is surely practical, a printed and specialized one will undoubtfully leave an enduring effect. To get attractive, brand-relevant satin lanyards to give your company just the right kind of exposure it needs and if employees are participating in conferences and exhibitions, wearing a branded lanyard will help them increase brand awareness. The work involved the design, development, and testing of a Lanyard Printing machine which overcomes the drawback of existing costly printing machines. The design and developmental stages include the gear and chain drive along with the rack and pinion method and their generation mechanisms. Details of a simple, sturdy, and efficient gear and chain unit, financially beneficial to laborers and producers are considered. The unit can print about 80 impressions per minute compared to 30 impressions per minute of existing machines.

Effects of Side Load Chains of a Combine Harvester on Unbalanced Dynamic Vibrations of Its Threshing Drum

In order to study the influence of the side drive on the balance state of the threshing drum, this paper used the side eccentric load chain drive as the power on the threshing drum dynamic balance test bench. By analyzing the influence of different radial phases, different axial distances, and spiral combinations of the threshing drum on the counterweight, this paper studies the law of the effect of side partial load chain drive on the dynamic balance of the threshing drum and finds that the side chain drive has obvious influence on the unbalance phase of the threshing drum and the change of the axial distance of unbalance has little effect on the equilibrium state of the threshing drum. And from this, a vibration balance method based on the equivalent unbalance of the chain drive is proposed, which can predict and calculate the unbalance of the threshing drum. The unbalance of the threshing drum predicted by this method is smaller than the actual measured unbalance. The maximum error is 32.64% and the minimum error is 4.6%. In the two tests, the predicted unbalance is 1.24 mm/s in amplitude and 270 degrees in phase and amplitude 1.4 mm/s and phase 120 degrees, respectively. The measured unbalance is amplitude 1.587 mm/s and phases 286 degrees. The error between prediction and actual measurement is less than 32.64%, and the unbalance amplitudes that can be reduced by one-time dynamic balance are 0.856 mm/s and 0.674 mm/s, respectively. The research results in this paper provide an effective method for the balance state of the multidrum side chain transmission.