Vol 69 No 1
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Date submitted1974-07-21
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Date accepted1974-09-09
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Date published1975-01-01
Calculation methods of traction devices with adjustable pressure of smooth wheels on the rail
- Authors:
- V. S. Bersenev
In various industries, there is a great interest in traction devices (TDs) with adjustable pressure of smooth driving wheels on the rail depending on the amount of traction 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
Leningrad Mining Institute designed, manufactured and tested in production conditions at the marble quarry Prokhoro-Balandinskoye ore management friction drive longitudinal feed for mining stone-cutting machines 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 rolling wheels of transport mechanisms 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 there are volumetric elastic deformations. ...
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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 falling ridges in loading machines
- Authors:
- V. I. Morozov
One of the characteristic features of the previously proposed scheme of the rowing-rotor actuator of a loading machine was the articulated engagement of the rower and its fall from a vertical position on the stack under the action of the gravity of the rower. ...
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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 of determination of parameters of the rowing-rotor actuator
- Authors:
- V. I. Morozov
The interaction of the comb-rotor actuator with the stack is shown schematically in figure. ...
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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 the rowing-rotor actuator
- Authors:
- V. I. Morozov
- I. P. Ivanov
The rowing-rotor actuator of a loading machine with rows fixed on the rotor at a given trajectory of the rowing tooth can be considered as a deaxial balancer-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
Raking operation
- Authors:
- V. S. Bersenev
- V. I. Morozov
As an initial position of work of the rowing-rotor actuator we shall accept the scheme of its work without lifting of the rotor axis. We consider that the work of the rotor gravity force is fully utilized for the work of introduction of combs into the stack. The trajectory of the comb 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, quite widely used in the mining industry for mine hoisting along vertical shafts, can solve the problem of transportation of unique loads 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 8-shaped wires
- Authors:
- V. A. Kabanov
- N. N. Plodovitov
The analysis of strength characteristics and design features of existing types of ropes suitable for modern powerful lifting installations (e.g., multi-rope vertical and inclined mine, suspended ropeways, as well as unique in lifting capacity ship elevators of hydroelectric power plants) 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
Research Institute VNIIGalurgy determined promising complexes for the chamber system of development, consisting of harvesters for ore stripping, self-propelled loading and transport vehicles for loading and delivery of ore on the chamber, scraper and belt conveyors for transportation of 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 piston sedimentation machine
- Authors:
- E. I. Bogdanov
- G. A. Terekhov
Features of the gravity method of beneficiation of heavy unclassified minerals require intensive water currents at relatively high values of displacements, velocities and accelerations. This determines the application of a mechanical drive for the OMT type stripping machines. ...
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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
- Authors:
- E. I. Bogdanov
- G. A. Terekhov
By means of 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 liquid was studied, the maximum overpressures in the chambers of the machine were determined at different values of the gap, 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 of research of 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. With the concept of aeration identify quantitative ratios of air and liquid phases, as well as 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
Methods and results of experimental studies of gas content in the chamber of 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 inhomogeneity. Air bubbles of varying size pass through any point in the chamber, capable of increasing in size as they float and coalesce. The inhomogeneity 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
About application of the crushing theories at determination of the power consumed by the crusher
- Authors:
- A. I. Kirichenko
Using in the design of crushing machines theories of crushing, we must not forget about the very significant shortcomings of these theories: their detachment from the specific conditions of crushing in the machine, the inability to take into account the influence of many real factors 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 the corrected wheel teeth
- Authors:
- I. P. Ivanov
- N. I. Vasilev
In most modern machines, gears are the main components affecting the performance, reliability and cost of the machines. In the design of gears, their strength calculations 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 reserve for increasing the load of gear gears
- Authors:
- I. P. Ivanov
When identifying 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 that meet certain requirements has been noted. Work on elucidating the role of lubricants in the contact strength of gear surfaces continues now. ...
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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
- Authors:
- N. A. Afanasev
- B. I. Livshits
Pneumatic motors, which are widely used in the mining industry to drive rock-loading machines, coal loaders, winches, drilling wrenches, gathering-drilling machines and other devices and mechanisms, have a number of advantages over electric motors: a) pneumatic motors are simple in design and easy to control; b) due to their soft characteristic, the reliability of mining machines at heavy dynamic modes 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
Characterization of wear of cylinder-piston group parts of pneumatic piston engines of P2,5F type in production conditions
Reliability of loading machines operation is determined by reliability and durability of pneumatic engines, in which one of the most responsible and stressed units is the cidinder-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 equal wear resistance of pneumatic motors and rock-loading machines
- Authors:
- N. A. Afanaseva
Analysis of the state of machines during operation and aging is based on the concept of suitability, which helps to improve the justification of the system of maintenance and repair of machines, methods of determining the optimal terms of their service. ...
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Date submitted1974-07-20
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Date accepted1974-09-28
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Date published1975-01-01
Guiding surfaces of the mechanism of axial-type rotary machines
- Authors:
- V. I. Vdovichenko
The principle of operation of the mechanism of rotary machines of axial type 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, realized through their interaction with special guiding surfaces, the type 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 guiding surfaces of the mechanism of axial-type rotary machines
- Authors:
- V. I. Vdovichenko
One of the essential advantages of the mechanism of axial rotating machines is the possibility of realization of geometric closure of kinematic pairs formed by plates with guiding surfaces. However, accurate geometric closure requires consideration of 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 mining and construction industries
- Authors:
- V. Yu. Nenarokomov
In the GDR, much attention is paid to the development of vibrating machines and devices that can be successfully used in the automation of production processes in the mining and construction industries. …