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Date submitted2023-03-16
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Date accepted2023-06-20
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Date published2023-07-19
Energy efficiency of the linear rack drive for sucker rod pumping units
- Authors:
- Oksana Yu. Ganzulenko
- Ani P. Petkova
At present, in order to increase oil production and reduce economic costs in the development of marginal fields, the development of a cluster method using compact mobile drives of sucker rod pumping units (SRPU) is relevant. The aim of the work is to analyze the ways to improve the energy efficiency of the SRPU by reducing the loss of mechanical and electrical energy, to select the most energy-efficient compact drive for the development of marginal fields in the cluster method, to carry out the kinematic and strength calculations of the drive of the selected size, to develop an adaptive control system for a group of drives in the cluster development of drillings. According to the results of the performed calculations, the linear rack-and-gear drive has the highest efficiency of the drive mechanism. The kinematic and strength calculations of a linear rack-and-gear drive with a stroke length of 1120 mm and a load of up to 8 tons are presented. It was shown that the usage of a direct torque control system and a kinetic energy storage system for the SRPU drive elements and a rod string is an effective means of reducing energy costs in oil production from marginal fields. The use of the developed system for storing and redistributing the potential energy of the rods between the SRPUs that lift oil made it possible to eliminate fluctuations in the power consumption, reduce the power peak value by three times, the peak value of the current consumed from the electric network by two times, and reduce losses in the input converter and cables by three times.
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Date submitted1951-07-25
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Date accepted1951-09-17
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Date published1952-03-26
Stress distribution in the rim of a rapidly rotating flywheel
- Authors:
- A. F. Zakharevich
Neglecting the influence of the spokes, we will consider the flywheel as a ring with a circular meridional cross-section (Fig. 1). Let r1 be the cross-section radius; r2 be the radius of the circle containing the cross-section centers. We will take the oz axis as the axis of rotation and assume that the angular velocity is constant and sufficiently large. Using the kinetostatic method, we will apply an inertial force to each element of the rod and determine its elastic equilibrium. To simplify the boundary conditions, we will move to bipolar coordinates.
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Date submitted1951-07-10
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Date accepted1951-09-13
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Date published1952-03-26
Determination of stresses in a gear disk under transverse bending with an axisymmetric load
- Authors:
- L. S. Burstein
The need to study stresses in gear disks arises when the wheel is subjected to axial forces during operation. In this case, we are dealing with a plane stress state, characterized by the magnitude of radial and tangential stresses at various points along the radius of the disk. Experimental study of stresses in a disk under static loading of a real sample is possible if the wheel's own weight is used as a load. As a support surface, one can use: 1) the end plane of the rim, loading the disks with the weight of the shaft and partially with the own weight of the disks; 2) the plane of the flange, loading the disks with the weight of the rim and partially with the own weight of the disks. The first position occurs when the wheel is freely supported on the rim, the second - when the wheel is suspended by the shaft.