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Date submitted1974-07-21
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Date accepted1974-09-09
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Date published1975-01-01
Methods for calculating traction devices with adjustable pressure of smooth wheels on the rail
- Authors:
- V. S. Bersenev
In various industries, great interest is shown in traction devices (TDs) with adjustable pressure of smooth driving wheels on the rail depending on the magnitude of the traction force or braking force they generate. …
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Date submitted1974-07-21
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Date accepted1974-09-26
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Date published1975-01-01
Design features of traction devices operating on a circular rail
- Authors:
- I. V. Nikiforov
When a traction device operates on a circular rail, there is a more complex relationship of external and internal forces associated with the geometric parameters of the mechanism. ...
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Date submitted1974-07-13
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Date accepted1974-09-14
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Date published1975-01-01
Investigation of the friction drive of the longitudinal feed of the stone-cutting machine
- Authors:
- V. P. Vasilev
- A. S. Medvedev
The Leningrad Mining Institute designed, manufactured and tested under production conditions at the marble quarry of the Prokhoro-Balandinskoye ore administration a friction drive for the longitudinal feed of mining stone-cutting machines of the type SM-177A. ...
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Date submitted1974-07-30
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Date accepted1974-09-22
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Date published1975-01-01
Determination of relative slip in rolling wheels of transportation mechanisms
- Authors:
- S. B. Altshuler
When wheels of transport mechanisms roll on rails and other fixed bases, as well as rollers of friction gears, in the contact area of the rolled bodies under the action of normal and tangential forces volumetric elastic deformations arise. …
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Date submitted1974-07-19
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Date accepted1974-09-07
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Date published1975-01-01
Static model of wheel-rail contact
- Authors:
- V. V. Denegin
The influence of some basic factors on the process of wheel-rail adhesion can be evaluated using a bar model. Such a model has been applied when considering the contact between two flat surfaces. ...
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Date submitted1974-07-07
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Date accepted1974-09-29
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Date published1975-01-01
About the role of cams in loading machines
- Authors:
- V. I. Morozov
One of the characteristic features of the previously proposed scheme of the cam-rotor actuating member of a loading machine was the hinged attachment of the cam and its fall from a vertical position onto the pile under the action of the cam's gravity. ...
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Date submitted1974-07-08
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Date accepted1974-09-03
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Date published1975-01-01
Methodology for determining the parameters of a cam-rotor actuating member
- Authors:
- V. I. Morozov
The interaction of the cam-rotor actuating member with the pile is shown schematically in the figure. The proposed methodology for determining the geometric and force parameters of a cam-rotor actuating member can be used in the design and creation of new cam-rotor loading machines.
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Date submitted1974-07-18
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Date accepted1974-09-19
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Date published1975-01-01
Grapho-analytical study of the kinematics of a cam-rotor actuating member
- Authors:
- V. I. Morozov
- I. P. Ivanov
The cam-rotor actuating member of a loading machine with cams fixed on the rotor, given the trajectory of the cam tooth, can be considered as a deaxial balanced-crank-slider planar mechanism. ...
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Date submitted1974-07-05
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Date accepted1974-09-25
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Date published1975-01-01
Loading operation
- Authors:
- V. S. Bersenev
- V. I. Morozov
As the initial operating position of the cam-rotor actuating member, we shall take the scheme of its operation without raising the rotor axis. We assume that the work of the rotor's gravity force is fully used for the work of penetration of the cams into the pile. The trajectory of the cam tooth in this case is a circle. ...
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Date submitted1974-07-02
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Date accepted1974-09-07
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Date published1975-01-01
Static balancing of inclined elevators with mine multi-rope hoisting machines
- Authors:
- V. A. Kabanov
- V. A. Yanush
Multi-rope hoisting machines with friction pulleys, which are quite widely used in the mining industry for mine hoisting along vertical shafts, are capable of solving the problem of transportation of loads unique in magnitude from significant depths. ...
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Date submitted1974-07-24
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Date accepted1974-09-19
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Date published1975-01-01
Test results of high-strength ropes with Z- and S-shaped wires
- Authors:
- V. A. Kabanov
- N. N. Plodovitov
An analysis of the strength characteristics and design features of existing types of ropes suitable for modern powerful hoisting installations (e.g., multi-rope vertical and inclined mine hoists, suspended ropeways, as well as ship lifts of hydroelectric power plants unique in lifting capacity) has showed that the most appropriate design is a closed-type rope. ...
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Date submitted1974-07-25
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Date accepted1974-09-15
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Date published1975-01-01
Investigation of vibration transportation of potash ore
- Authors:
- E. S. Kuznetsov
- I. P. Timofeev
By research of the VNIIGalurgy Institute, promising complexes for the chamber mining system have been determined, consisting of combines for ore breaking, self-propelled loading and transport machines for loading and delivering ore along the chamber, and scraper and belt conveyors for transporting ore to the shaft. ...
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Date submitted1974-07-21
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Date accepted1974-09-15
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Date published1975-01-01
Differential equation of fluid motion in a piston jigging machine
- Authors:
- E. I. Bogdanov
- G. A. Terekhov
The features of the gravity method of beneficiation of heavy unclassified minerals require intense water currents at relatively large values of displacement, velocities and accelerations. This determines the use of a mechanical drive for jigging machines of the OMT type. ...
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Date submitted1974-07-29
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Date accepted1974-09-02
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Date published1975-01-01
Electronic modeling of liquid motion in piston settling machine of OMT type **Electronic modeling of fluid motion in a piston jigging machine of the OMT type**
- Authors:
- E. I. Bogdanov
- G. A. Terekhov
Using electronic modeling, the influence of the size of the gap between the piston and the walls of the machine on the oscillatory motion of the fluid was studied, and the maximum excess pressures in the chambers of the machine were determined at different values of the gap, as well as the velocities and accelerations of the piston. ...
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Date submitted1974-07-21
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Date accepted1974-09-24
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Date published1975-01-01
Selection of means for studying the aeration characteristics of flotation machines
- Authors:
- N. N. Denegina
- V. V. Denegin
One of the most important aerohydrodynamic indicators of any flotation machine is aeration. The concept of aeration is identified with the quantitative ratios of the air and liquid phases, as well as the qualitative characteristics of the size of air bubbles and their distribution over the volume of the chamber. The quantitative side of the aeration process can be expressed through the degree of aeration and the density of the flotation system. ...
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Date submitted1974-07-16
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Date accepted1974-09-22
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Date published1975-01-01
Methodology and results of experimental studies of gas content in the chamber of a mechanical flotation machine
- Authors:
- V. V. Denegin
- N. N. Denegina
One of the characteristic features of the flow in the chamber of a mechanical flotation machine is its non-uniformity. Air bubbles of various sizes pass through any point of the chamber, able to increase in size as they rise and coalesce. The non-uniformity is particularly strong in the lower layers of the chamber, where the turbulent nature of the motion prevails. ...
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Date submitted1974-07-18
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Date accepted1974-09-09
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Date published1975-01-01
On the application of the crushing theories in determining the power consumed by a crusher
- Authors:
- A. I. Kirichenko
When using crushing theories in the design of crushing machines, one must not forget the very significant shortcomings of these theories: their detachment from the specific conditions of crushing in the machine, and the inability to take into account the influence of the many factors actually acting on the crushing process and force loading, manifested directly in the working space of the crusher. ...
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Date submitted1974-07-13
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Date accepted1974-09-09
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Date published1975-01-01
Calculations of the shape coefficients of corrected gear teeth
- Authors:
- I. P. Ivanov
- N. I. Vasilev
In most modern machines, gears are the main components affecting the operability, reliability and cost of the machines. In the design of gears, calculations for their strength are of great importance. …
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Date submitted1974-07-11
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Date accepted1974-09-16
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Date published1975-01-01
Evaluation of synthetic oil as a a means of increasing the load of gears
- Authors:
- I. P. Ivanov
In determining the contact strength of gears, researchers have always noted the influence of the nature of lubricants on the development of fatigue pitting. The possibility of creating synthetic oils meeting certain requirements has also been noted. Work on elucidating the role of lubricants in the contact strength of toothed surfaces continues today. ...
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Date submitted1974-07-13
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Date accepted1974-09-23
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Date published1975-01-01
Influence of cylinder-piston group parts distortions on internal losses in pneumatic engines **Influence of misalignments of cylinder-piston group parts on internal losses in pneumatic engines**
- Authors:
- N. A. Afanasev
- B. I. Livshits
Air motors, which are widely used in the mining industry to drive rock-loading machines, coal reloaders, winches, drill wrenches, heading-and-drilling machines and other devices and mechanisms, have a number of advantages over electric motors: a) air motors are simple in design and easy to control; b) owing to their soft characteristic, the reliability of mining machines under heavy dynamic conditions and alternating loads increases. ...
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Date submitted1974-07-02
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Date accepted1974-09-04
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Date published1975-01-01
Characteristic of the wear of cylinder-piston group parts of P2.5F type pneumatic piston engines of under production conditions
The reliability of the operation of loading machines is determined by the reliability and durability of air engines, in which one of the most critical and stressed units is the cylinder-piston group. …
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Date submitted1974-07-29
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Date accepted1974-09-14
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Date published1975-01-01
On the equal wear resistance of air motors and rock-loading machines
- Authors:
- N. A. Afanaseva
The analysis of the state of machines during operation and aging is based on the concept of serviceability, which helps to improve the substantiation of the system of maintenance and repair of machines and the methods of determining the optimal service lives. ...
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Date submitted1974-07-20
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Date accepted1974-09-28
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Date published1975-01-01
Guide surfaces of the mechanism of axial-type rotary machines
- Authors:
- V. I. Vdovichenko
The principle of operation of the mechanism of axial-type rotary machines has been considered in detail earlier. A characteristic feature of these machines is the forced movement of plates (blades) along the axis of rotation of the rotor, brought about through their interaction with special guide surfaces, the form of which completely determines the working properties of the machine. ...
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Date submitted1974-07-10
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Date accepted1974-09-05
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Date published1975-01-01
Correction of the guide surfaces of the mechanism of axial-type rotary machines
- Authors:
- V. I. Vdovichenko
One of the essential advantages of the mechanism of axial rotary machines is the possibility of achieving geometric closure of the kinematic pairs formed by the plates with the guide surfaces. However, accurate geometric closure requires taking into account some design and technological factors, which in the case of force closure can be chosen arbitrarily. ...
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Date submitted1974-07-23
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Date accepted1974-09-30
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Date published1975-01-01
From the experience of the GDR in the field of development of vibrating machines for the mining and construction industries
- Authors:
- V. Yu. Nenarokomov
In the GDR, great attention is paid to the creation of vibrating machines and devices that can be successfully used in the automation of production processes in the mining and construction industries. …