Results 1 - 10 of 538
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[en] Tests of power tools and measurements of the impact energy on the basis of Procedure 05 of the European Power Tools Association (EPTA) and the method in State Standard GOST 55162-2012 are compared by means of the UIPU-4M system (developed by OOO UDARMASh). It is found that the test and measurement methods may be improved, with increase in precision and reproducibility.
[en] A method is proposed for analysis of the dynamic magnetization characteristics of proportional electromagnets. By that means, the electrical parameters may be determined, with a view to controlling the production process. The method includes three basic steps. First, the information to be analyzed is winnowed by a projection method. The second step is to classify the measured characteristics in groups. In the third step, regression models are used to determine the electrical parameters of the components in a proportional electromagnet.
[en] The prospects for additive technology in facilitating the manufacture of components for gas-turbine engines are considered. The expediency of electron-beam melting (EBM) in the manufacture of monowheel impellers is considered.
[en] The design of slip bearings with liquid lubricant used in airplane engines is analyzed. The advantages and disadvantages of the bearings when used in highly stressed transmissions are considered. Means of improving the bearings by means of new materials are proposed.
[en] A mathematical model is proposed for the connecting rod of a diesel engine as a deformable component of a crank mechanism. VisSim 6.0 software is used for dynamic simulation of the connecting rod. Vibration is observed when the force exerted by the gas pressure is a maximum.
[en] New unipolar magnetic bearings of high-speed and superhigh-speed electric motors for different branches of industry are described. A new design is proposed and investigated by computer simulation. On the basis of the results, a mockup is created, and the computer models are verified.
[en] Parametric synthesis of a two-mass supply drive is considered, in the case where one mass is the moment of inertia of the drive’s rotating part, while the other is the reduced moment of inertia of the drive’s linearly moving part. The elastic coupling between the masses determines the axial rigidity of the drive. In synthesis, the parameters of the electromechanical system are determined by setting the coefficients of the characteristic polynomial equal to the coefficients of the polynomial approximating an ideal low-frequency filter.
[en] A single-disk grinding head with simple primary kinematics does not ensure satisfactory machining of the sealing surfaces of pipeline gate valves. New multidisk grinding heads are considered.
[en] Drill failure is due to the predominant wear of the rear surface or ribbon, depending on the range of cutting speed. Such wear is accompanied by increase in the cutting torque to critical values. Formulas are derived for the limiting permissible wear.