According to the multi-objective optimization problem related with radial volumetric strain, drawing force, friction dissipation energy and residual stresses, linear weighted method was implemented to determine the optimized drawing angle.
A series of computations were made for various wave incident directions (α_0<70°) and current directions(β<30°)with two different assumptions: (1) including energy dissipation by bottom friction; (2) neglecting energy dissipation by bottom friction. For engineering practical purposes, nomograms were drawn for the case of straight contour line and current of uniform distribution in the absence of bottom friction dissipation.
This paper introduces the structure and principle of a new type of rotary compressor which has a rotating sleeve and an embedded vane. The compressor not only has advantages such as small volume,light weight,simple manufacturing technicality,but also has much lower vibration noise,much less friction waste and leaking loss than those of the conventional rolling piston compressors.
This paper introduces the structure of a new compressor of air conditioner for Automobiles with a rotating sleeve, an embedded vane and a hinged vane. The compressor is provided not only the advantages of simple frame and good balance at high speed, but also much less friction waste and leak loss than those of the traditional vane compressor for automobile conditioner.
This paper introduces the structure and principle of the new type of rotaly refrigerator compressor which has a rotating sleeve an embedded vane and two follower end－covers． The compressor not only takes the advantages of conventional rolling－piston compressors such as compact light simple structure but also has lower vibration noise less friction waste and leaking loss than those of the rolling－piston compressors．
This paper introduces the structure and principle of a new type of rotary vane vacuum pump which has a rotating sleeve and an embedded vane. The pump not only has the advantages of small volume, light weight and simple structure, but also has much less abrasion and leaking in comparison wih the traditional sliding vane rotary vacuum pumps.
Scroll compressors are regarded as model of miniature compressors for their compact structure, efficient, running smoothly, small vibration and low-noise, but the mechanical efficiency and volume efficiency are influenced by frictional loss and leakage loss seriously.
The wind loss denotes the energy lost due to the friction between the rarefied gas in the vacuum chamber and the energy storage flywheel rotating at a super high speed. The theoretical formula is deduced to draw the wind loss at the cylindrical side wall and the end side of the flywheel. The method of cut ting down the wind loss is presented according to the calculation and analysis on the wind loss.
The paper describes solutions to the problem of minimizing the friction loss in normal regimes and the problem of restricted lubrication of a segmental bearing.
Results are given of calculations of the position of the points of support of the segments of a steam-turbine radial bearing ensuring a minimum of the friction loss.
The mechanism of the friction of particles of a polydisperse material on the channel wall is considered under the assumption the friction loss of energy is caused by multiple semielastic collisions of the particles against the wall.
Influence of the moment of inertia of the pendulum on the internal friction (loss tangent) measured by free decay
The internal friction (loss tangent) of solids is normally measured, as a function of temperature, with a torsion pendulum operating in free decay.