In article was considered following parameters: influence of input and output angles of stator and rotor on hydraulic efficiency coefficient, calculating sequence and construction of setting, mechanical characteristics of direct-flow multi-step hydro-turbine for driving of submarine machines and mechanisms.
The prospects for development of underwater deposits of iron-manganese nodules are considered, the design of an underwater hydraulic mining complex is described, the calculation of the configuration of the route and characteristics of the flexible pipeline connecting the mining module with the receiving vessel is given. The load on the executive body of the mining machine is calculated and the design of the flow part of the driven direct flow multistage hydraulic turbine is described.
A mathematical model is presented describing the configuration of flexible pipeline routes for a hydraulic mining complex for lifting ferromanganese and other nodules, as well as polymetallic sands, silt and crushed crustal formations from the surface of the seabed. The pipeline connects the subsea mining machine with the slurry receiver on the base vessel. The proposed model is based on the chain-link equation and describes the configuration of flexible, articulated pipeline routes over a wide range of distances between the base vessel and the mining machine. For the first time possible variants of chain line defining marginal boundaries of flexible pipeline location with positive buoyancy are constructed by analytical solution according to coordinate values. On the basis of the obtained results the peculiarities of mechanics of behavior of positive buoyancy flexible pipeline under its own load have been determined.
The main results of research work performed at the departments of the mechanical cycle of the Faculty of Mining and Electromechanics in 2000 are presented. Research and design works for making effective and environmentally safe machines and complexes for mining and processing industries are made at the Faculty of Mining and Electromechanics under the guidance of leading experts. The analysis of design and operating characteristics of manufactured dump trucks is given and modern principles of formation of design and operating requirements to them are formulated. A methodology and mathematical model for determining the optimal characteristics of the complexes have been developed. Studies on the development of hydraulic transport equipment for underwater development of offshore mineral deposits have been carried out. New technological schemes of slurry hydrotransportation in flexible sectional pipelines of variable curvature united by spherical joints are proposed. Research work on the development of the theory of working processes and improvement of electromechanical mining equipment complexes for energy-saving technologies was carried out.
The design, power supply parameters, calculation procedure and profiling of the flow part of a low-speed multistage direct-flow hydraulic turbine with active grids of rotor blades for underwater mining machines are considered.
The beginning, laid in the USSR in 1953, of hydraulic stripping of coals and strong rocks in the mining industry, led to a number of domestic and foreign experimental studies of nozzles in order to determine those of their profiles, which provide maximum forces on the bottom hole - preventing the flow.
The efficiency of mining machinery use is assessed by three indicators: productivity, resource and safety criteria, which determine the quality of mining, transportation, stationary and enrichment machines and depend on the ratio of their permissible and actual loads.
The nature of rock fracture under the action of the cutter depends on the stresses in the area of their concentration in the massif, determined by its outlines and the applied force. In the process of cutting the boundaries of the array, the magnitude and angle of the applied force with the contact site change.
General considerations about the basic physical phenomena occurring during the transfer of mechanical energy from the impeller to the fluid flow in a centrifugal pump are quite clearly reflected in the derivation of the basic equation of turbomachines.
In modern drilling machines for the drive of rotary-feeding mechanisms are increasingly common volumetric hydraulic drives.
The drill feed drive consists of an electric motor, a variable displacement pump, a hydraulic line including a safety valve and a throttle regulator, a hydraulic motor and a mechanical transmission from the hydraulic motor to the drilling tool, which is also acted upon by the rotator drive.
The equations of motion of the drive of the executive body of the combine harvester GPC taking into account the oscillatory properties of the transmission of the gear reducer of the cutting part for the case of the crown movement from top to bottom have the form...
Further growth of labor productivity in the mining industry at the modern level of mechanization of mining and tunneling works can be ensured by increasing the reliability and durability of machines ways to improve the drives of their executive bodies.
Mathematical models of the drive of rotary feed mechanisms (RPM) of roller cone drilling machines, necessary for the selection of operational modes of control of drilling processes and design of systems of automatic regulation of its parameters, are poorly studied.
To solve the problem of automating the drives of the executive bodies of combine harvesters and other mining machines, a number of control algorithms known under the names of minimum and maximum variants, as well as parametric stabilization of cutting modes ...
Studies of radial hydraulic turbine engines in the mine water network show that the characteristic of the network p *p(Q), reduced to the inlet of the turbine engine, is approximated closely enough by a quadratic parabola of the form ...
Modern mechanohydraulic harvesters with a hydraulic turbine drive, prototypes of which are being industrially tested at hydraulic mines in Kuzbass, are self-propelled machines of selective action with actuators in the form of crown cutters...
Экспериментальные и теоретические исследования, проводимые в ЛГИ по созданию двухступенчатой активной гидротурбины с наклонноструйными ступенями, гидродинамическая схема которой представлена на рисунке, показали, что характеристики таких турбин вполне отвечают задачам турбопривода на гидрошахтах и имеют ряд преимуществ. Из них наиболее важны сравнительно низкая удельная быстроходность двухступенчатого турбодвигателя, малый радиальный размер и характерный для двигателя осевой отвод отработавшей воды. Как показали испытания экспериментального образца такого турбодвигателя, при правильном задании конструктивных параметров, по своему к. п. д. он может не уступать применяемым в настоящее время радиальным и ковшовым турбодвигателям ...
Анализ рабочего процесса наклонноструйной гидротурбины на основе уравнения Эйлера показывает, что гидравлический к. п. д. ее рабочего колеса выражается соотношением ...
В связи с разработкой новой техники для высокопроизводительных гидрошахт на одно из первых мест в ближайшее время ставится проблема создания автономных добычных и проходческих машин. Такими машинами могут быть самоходные гидромониторы высокого давления ...
