Content
1.2 Block diagram of the automation system of a lava…
1.3 The purpose of the design and requirements for the automation system
3. Rationale for the direction of automating the process
3.1 Principles of constructing a system of automatic control
3.2 The functions of the automatic control system…
3.3 Rationale for the type of model
3.4 Rationale and design of circuit solutions automation system…
The basis of the technical process in coal mines is the widespread adoption of high-production units equipped with the modern explosion-proof electrical equipment.
This graduate work the issue of automatic control down hole scraper conveyor, which incorporates two adjustable drive.
Problem Statement: Necessary to improve the structure of the aircraft, entering a chain of separate management of occasions, which would avoid additional losses and reduce the load on the traction chain, to increase torque and efficiency of pipeline protection from sudden overloads.
The process of coal mining as an automation object consists of the following components:
1) coal mining;
2) transportation of coal for slaughter to the point of embarkation;
Currently, the Ukrainian mines can be found two levels of process automation of coal mining: the first level is characterized by the fact that processes are mechanized excavation transportation of coal, and mount-out space is carried out manually. The second level of automation is characterized by the fact that all three components of the mechanized coal mining (usually with the use of coal mining complexes).
On the mine of Bazhanov coal mining is carried out by mining combine type CGS-13.
To the actuator, its protection, as well as to automate the management of the feed rate depending on the load on the processor used in the electric load controller "Uranus. "
1.2 Block diagram of the automation system of a lava…
1.3 The purpose of the design and requirements for the automation system
The purpose of the project: improvement of the automatic control system of electric downhole scraper conveyor through an electromagnetic clutch slip…
The most complete study of the dynamics of flight conveyors made by Professor IG Shtokman. Significant contribution to the theory drive the scraper conveyor made by BA Skorodumov, LI Chugreev, OF Vortices. Significant contribution to the improvement of electric mining conveyors made V.S. Butev, M.I. Golubev, who developed thyristor asynchronous electric drives based on the three-phase thyristor voltage regulators, respectively, for the scraper and conveyor belts.
However, in these studies was not resolved a number of topical issues. Further development of the asynchronous thyristor mine scraper conveyor was in the equipment ASTK. On the basis of reasonable parameters, and the positive results of experimental studies developed an algorithm for power control thyristor switch in the drive underground scraper conveyor and established power thyristor unit controls the drive underground scraper conveyor (ASTK). But there are also disadvantage:
1) thyristor systems are complex, have relatively large size and cost;
2) noise reduction devices cost a lot;
3) for all types of converters are not solved the problem of protection against leakage to earth.
Institutions and Automatgormash Giprouglemash the apparatus of the automatic drive control P110E containing a planetary gear and an electromagnetic clutch slip. Based on the last of the inductor is located in the gap with the magnetic coil excitation. The main advantage of an electromagnetic clutch - easy to operate. The main disadvantage inherent in the electromagnetic clutch slip - low efficiency for large slides.
Release of the equipment best fits the necessary requirements for automatic control equipment scraper conveyor with electromagnetic clutch automatic sliding device drive control buttonhole assembly line P110E APM-110E.
APM-110E unit can operate in one of two possible modes - main or auxiliary.
Accept the automatic control equipment electric down hole scraper conveyor APM-110E as a base of technical solutions management system.
3 3. Rationale for the direction of automating the process
Earlier, as the basic technical solutions of automatic control system operated down hole scraper conveyor was adopted by the unit AUP110E. This device ensures that the most necessary functions.
However, to ensure that all required functions in its design changes are required. So, take the next direction of automating the process of transportation of the angle of pollution control slaughter: improving the existing office automation with the replacement of the element base for microprocessor elements and enhanced functionality.
3.1 Principles of constructing a system of automatic control
Central element around which the whole system of automatic control is a microcontroller. To him connect sensors and controls (if necessary via matching devices), and output signals are fed to the thyristor switches, which control excitation windings of electromagnetic clutches.
In the projected instrumentation means of gathering information submitted by a number of sensors that measure parameters down hole operation of the scraper conveyor.
The composition of the collection of information includes: two current sensor drive motor (for the lower and upper conveyor drive), speed sensor traction chain conveyor (uses magnetic induction sensor type DM-2M), two current sensor measuring the current in the excitation windings of electromagnetic coupling of the upper and lower actuators, sensors, temperature of the windings of motors drives.
To process input from sensors and controls the information used by the integrated microcontroller. To perform the necessary functions for processing information microcontroller must have built-in tools for converting analog signals into digital.
Means of information display devices automatically control the drive down hole scraper conveyor presents a number of LED indicators that signal the operation of equipment and interferences.
In addition to “LEDs” on the cover explosion-proof shell made of equipment Turnout instruments showing the current in the windings of the excitation of electromagnetic clutches.
3.2 The functions of the automatic control system…
3.3 Rationale for the type of model
Was chosen mathematical modeling pipeline…
3.4 Rationale and design of circuit solutions automation system…
The functional scheme of automatic control equipment operated down hole scraper conveyor provides for individual control of the upper and lower drive for what it contains two identical control channel.
The scientific novelty.
1. A new mathematical model of the system: the administrative apparatus, electric conveyor EMT - Conveyor, wherein light of the dynamic properties of the differential gear with an electromagnetic brake slip.
2. The regularities of the formation of dynamic forces in a mechanical system scraper conveyor with a drive through the differential gear with EMT in the mode of start-up and jamming with the traction chain.
3. A study of a new method to reduce mechanical overload conveyor.