This article discusses the parameterization of the crank-slider group of the Stirling engine to use in timber industry. Parametrization means involves into the equations a lot of variables: lengths of connecting rods of piston and displacer, positions of the axis of the cylinders The dependences of the piston and displacer movements are obtained for a free layout of the X-type Stirling engine mechanism. The boundary conditions of the lengths of the connecting rods are determined, taking into account the displacement of the cylinders’ axes in the plane perpendicular to the axis of the crankshaft. The resulting system of equations for the displacement of the piston from the displacement of the displacer will allow you to obtain a numerical model without modeling the crank and connecting rods, which will significantly reduce the resource intensity of numerical calculations. Further studies will aim to investigate the operation of the Stirling engine in compressor mode. This will allow determining the temperature difference between the cold and hot parts, which will allow you to indirectly evaluate the efficiency of operation in the engine mode. This study will eventually determine the optimal parameters of the designed engine, depending on the power and type of fuel used.
In this paper, we consider effective delivery of feed to fish cages. The rotary feeders design analysis is performed. Their disadvantages are analyzed. Possible ways to improve reliability are identified: rotor balancing, elimination of moving parts in design. The design of the feeder without moving parts is proposed, which provides the required parameters of feed distribution in cages and at the same time has high reliability and almost unlimited service life. To justify the design parameters of the feeder, we developed design factors that affect the feed distribution process (height of the pipe cut, height of the cone position, radius of curvature of the generatrix), and an integral criterion for evaluating the quality of feed distribution. The integral criterion includes an assessment of the effective area of feed distribution in the cage and its uniformity. A numerical multifactor study was performed and the optimal values of design factors were determined with the maximum value of the integral criterion that determines the efficiency of the feed distribution process. Based on the results of processing the obtained data, the high quality of feed distribution in cages and the prospects of the proposed design of the feeder as a whole were determined.
This article discusses the multi-criteria parameterization of the crank-slider group of the Stirling engine type "alpha". The dependences of the displacement of the piston and the displacer are obtained, taking into account a number of variable geometric parameters. The resulting equation of movement of the piston from displacement of the propellant is composed of a crankshaft angle, which will allow to obtain a numerical model simulation of the crank-slider group that will significantly reduce the time of numerical calculations. The dependence of the torque on the crankshaft with known pressures on the piston and the displacer is obtained. This study will eventually allow us to determine the optimal parameters of the designed steering engine, depending on the power and operating temperatures. This will allow us to design an engine for use in the timber industry (use of logging and woodworking waste as fuel). Effective use for energy generation is an urgent task of the forest complex. Currently, obtained torque equation will allow us to study the working process of the engine when solving the gas-dynamic problem of cyclic flow of gas from the cavity of the piston cylinder to the cavity of the displacer cylinder and back.
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