The study of liquid flux coefficient dependence in axial clearance of electrically driven pump unit on operating and structural parameters

2020 ◽  
Vol 27 (2) ◽  
pp. 149-156
Author(s):  
Dmitry Malov ◽  
Leonid Shablii
Keyword(s):  
Structural Parameters ◽  
Pump Unit ◽  
Liquid Flux ◽  
Axial Clearance

Optimum Design of Double-Well Pumping Units Based on Calculation of MATLAB Optimization Toolboxes

2012 ◽  
Vol 479-481 ◽  
pp. 694-698
Author(s):  
Wen Tao Qu ◽  
Dong Sheng Liao ◽  
Tao Ren ◽  
Wen Sun
Keyword(s):  
Simulation Optimization ◽  
Structural Parameters ◽  
Matlab Simulation ◽  
Pump Unit ◽  
System Parameters ◽  
Pumping System ◽  
Conventional Design ◽  
Pumping Unit ◽  
Pumping Units ◽  
New Generation

Beam double-well pump unit as a new generation of pumping unit is currently used in mechanical oil production. However, due to a number of pumping system parameters, the conventional design can not achieve the optimal pumping system parameters Using MATLAB simulation optimization algorithms, simulates the structural parameters, rod speed, rod acceleration, rod load, crank torque factors and gear’s crank shaft net torque of the double horse head double-well pumping unit, achieving optimal design of double horse head double-well pumping system, with the existing conventional design of double horse head double-well pumping unit, double horse head double-well pumping unit has a great improving than conventional pumping unit in motion and power dynamic characteristics.

scholarly journals Abnormal Wear Mechanism and Improvement of High-Speed Cylindrical Roller Bearing

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Wenhu Zhang ◽  
Sier Deng ◽  
Song Zhang ◽  
Jian Wang ◽  
Jintao Zheng
Keyword(s):  
High Speed ◽  
Working Condition ◽  
Structural Parameters ◽  
Roller Bearing ◽  
Working Surface ◽  
Axial Clearance ◽  
The Difference ◽  
Cylindrical Roller Bearing ◽  
Cylindrical Roller ◽  
Dynamic Unbalance

This paper presents the dynamic differential equations of cylindrical roller bearing, considering the dynamic unbalance mass of roller and the contact between the roller end face and the inner ring rib. The influence of bearing working condition and structural parameters on the P V value of roller end face and the slip speed of roller working surface were analysed. The theoretical analysis and experimental results both show that the large amount of roller’s dynamic unbalance mass due to the difference in chamfering size on both sides of the roller and the deviation of the bearing axial clearance are the main causes of abnormal wear on the roller working surface and end face.

Optimal design of a high homogeneous and small-size shim coil for atomic spin gyroscope based on 0-1 linear programming

2020 ◽  
Vol 64 (1-4) ◽  
pp. 165-172
Author(s):  
Dongge Deng ◽  
Mingzhi Zhu ◽  
Qiang Shu ◽  
Baoxu Wang ◽  
Fei Yang
Keyword(s):  
Linear Programming ◽  
Power Consumption ◽  
Low Power ◽  
Optimization Design ◽  
Structural Parameters ◽  
Axial Position ◽  
Low Power Consumption ◽  
Optimal Method ◽  
Atomic Spin ◽  
Shim Coil

It is necessary to develop a high homogeneous, low power consumption, high frequency and small-size shim coil for high precision and low-cost atomic spin gyroscope (ASG). To provide the shim coil, a multi-objective optimization design method is proposed. All structural parameters including the wire diameter are optimized. In addition to the homogeneity, the size of optimized coil, especially the axial position and winding number, is restricted to develop the small-size shim coil with low power consumption. The 0-1 linear programming is adopted in the optimal model to conveniently describe winding distributions. The branch and bound algorithm is used to solve this model. Theoretical optimization results show that the homogeneity of the optimized shim coil is several orders of magnitudes better than the same-size solenoid. A simulation experiment is also conducted. Experimental results show that optimization results are verified, and power consumption of the optimized coil is about half of the solenoid when providing the same uniform magnetic field. This indicates that the proposed optimal method is feasible to develop shim coil for ASG.

A Possible Basis for Nondestructive Characterization of Ropes of Nylon 6

1997 ◽  
Vol 503 ◽  
Author(s):  
H. Jiang ◽  
M. K. Davis ◽  
R. K. Eby ◽  
P. Arsenovic
Keyword(s):  
Tensile Strength ◽  
Service Life ◽  
Fiber Diameter ◽  
Structural Parameters ◽  
Crystal Form ◽  
Nylon 6 ◽  
Remaining Service Life ◽  
Nondestructive Characterization ◽  
Fractional Content

ABSTRACTPhysical properties and structural parameters have been measured for ropes of nylon 6 as a function of the number of use operations. The fractional content of the α crystal form, sound velocity, birefringence, tensile strength and length all increase systematically and significantly with increasing the number of use operations. The fractional content of the γ crystal form and fiber diameter decrease with use. These trends indicate that the measurement of such properties and structural parameters, especially the length, provide a possible basis for establishing a reliable, rapid, and convenient nondestructive characterization method to predict the remaining service life of nylon 6 ropes.

Structural Parameters of Bacterial Plankton in Ponds with High Contents of Mineral Nitrogen

2007 ◽  
Vol 43 (5) ◽  
pp. 91-100
Author(s):  
Ye. V. Starosila ◽  
G. N. Oleynik ◽  
Yu. G. Krot
Keyword(s):  
Structural Parameters ◽  
Mineral Nitrogen
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