CN114988022A - Dual-drive scraper conveyor - Google Patents
Dual-drive scraper conveyor Download PDFInfo
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- CN114988022A CN114988022A CN202210548966.3A CN202210548966A CN114988022A CN 114988022 A CN114988022 A CN 114988022A CN 202210548966 A CN202210548966 A CN 202210548966A CN 114988022 A CN114988022 A CN 114988022A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
- B65G17/30—Details; Auxiliary devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/24—Gearing between driving motor and belt- or chain-engaging elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/02—Control devices, e.g. for safety, warning or fault-correcting detecting dangerous physical condition of load carriers, e.g. for interrupting the drive in the event of overheating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
A dual-drive scraper conveyor belongs to the technical field of coal mine equipment. The dual-drive scraper conveyor comprises a machine head motor, a machine tail motor, a frequency converter, scrapers, scraper chains and a control system, wherein the control system comprises a programmable controller processing unit, an electric parameter acquisition module I, an electric parameter acquisition module II, a pressure sensor and a strain sensor, the real-time output power of the machine head motor is acquired by the electric parameter acquisition module I, the real-time output power of the machine tail motor is acquired by the electric parameter acquisition module II, the real-time pressure applied to the scrapers is acquired by the pressure sensor, the real-time strain value of the scraper chains is acquired by the strain sensor and is transmitted to the programmable controller processing unit, the programmable controller processing unit controls the output power of the machine tail motor through a built-in program, and the output power of the machine head motor and the output power of the machine tail motor are dynamically balanced. The dual-drive scraper conveyor can realize high-power drive and dynamic power balance, and avoids equipment damage caused by overlarge power of a motor of the machine head.
Description
Technical Field
The invention relates to the technical field of coal mine equipment, in particular to a dual-drive scraper conveyor.
Background
At present, a scraper conveyor is a main power conveying device of a fully mechanized coal mining face, and the scraper conveyor drives a chain wheel to rotate through a driving motor in the operation process so as to convey raw coal continuously outwards. With the rapid development of the large mining height technology in China, the heavy scraper conveyor is widely applied to the fully mechanized mining face, the overlying rock stratum collapses along with the increase of the mining height, the rotation pressure is increased, the difficulty of controlling the stability of the coal wall is increased, the rib caving blocks of the coal wall are increased, and the instantaneous load capacity of the scraper conveyor caused by rib caving is improved. Meanwhile, along with the increase of the length of a working face, the load of the scraper conveyor is increased and the amplitude of variation is increased, the occurrence probability of the slipping shutdown fault is increased due to the occurrence of instantaneous load, the mining efficiency is reduced, and the single motor drive cannot meet the working requirement.
Therefore, a double-end driving mode is needed, namely, a driving motor is respectively arranged at the head and the tail, and in the actual operation process, because of the influence of load, operation resistance and installation inclination, the load of the motor at the head side is far greater than that of the motor at the tail side, so that the operation power of the motors at two ends is seriously unbalanced, the motor at the head side is extremely easy to burn and damage, serious economic loss is caused, and the mining efficiency of a fully-mechanized mining face is seriously influenced.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a dual-drive scraper conveyor which can effectively utilize dual-drive motors at two ends of a machine head and a machine tail to realize high-power driving, adopts a frequency converter to dynamically adjust the machine tail motor to realize power balance, and avoids equipment damage caused by overhigh power of the machine head motor.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a dual drive scraper conveyor comprising:
a head motor mounted to the head sprocket;
the tail motor is arranged on a tail chain wheel and is connected with the frequency converter;
the scraper is arranged on a scraper chain, and the scraper chain is sleeved outside the machine head chain wheel and the machine tail chain wheel; and
the control system comprises a programmable controller processing unit connected with the frequency converter, a first electrical parameter acquisition module arranged on a machine head motor, a second electrical parameter acquisition module arranged on a machine tail motor, a plurality of pressure sensors arranged on the scraper and a plurality of strain sensors arranged on the scraper chain; the first electrical parameter acquisition module acquires the real-time output power of a head motor, the second electrical parameter acquisition module acquires the real-time output power of a tail motor, the pressure sensor acquires the real-time pressure on a scraper, and the strain sensor acquires the real-time strain value of a scraper chain, and all the real-time output power, the real-time pressure and the real-time strain value are sent to the processing unit of the programmable controller; the programmable controller processing unit controls the frequency converter to work through a built-in program, and further controls the output power of the machine tail motor, so that the output power of the machine head motor and the output power of the machine tail motor are dynamically balanced.
Further, the programmable controller processing unit controls the output power of the tail motor through a built-in program, and the method comprises the following steps:
(1) if the real-time pressure collected by the pressure sensor is less than or equal to the pressure set value and the real-time strain value collected by the strain sensor is less than or equal to the strain set value, the programmable controller processing unit controls the real-time output power P of the tail motor Tail Keeping the same;
(2) if the real-time pressure acquired by the pressure sensor is greater than the pressure set value and/or the real-time strain value acquired by the strain sensor is greater than the strain set value, the programmable controller processing unit determines the adjusting power P of the tail motor through the following formula Regulating ：
P Regulating ＝Ae ax+b +B 1 +Ay+B 2 +c 0 －P Machine head ；
In the formula, P Regulating Adjusting power of a tail motor; a is a motor fluctuation coefficient; e is a natural logarithm; a is a compensation coefficient of the pressure sensor; x is the real-time pressure collected by the pressure sensor; b is the pressure sensitive coefficient of the strain sensor; b 1 Is a compensation value of the pressure sensor; y is a real-time strain value acquired by the strain sensor; b is 2 Is a compensation value of the strain sensor; c. C 0 Compensating the initial value for the power; p Machine head Outputting power of a handpiece motor in real time;
the programmable controller processing unit adjusts the power P according to the tail motor Regulating The following judgment is made:
if P is Regulating ＝P Tail The programmable controller processing unit controls the real-time output power P of the tail motor Tail Keeping the original shape;
if P Regulating ≠P Tail The programmable controller processing unit controls the real-time output power P of the tail motor Tail Adjusted to the regulated power P of the tail motor Regulating 。
Furthermore, the first electrical parameter acquisition module is used for acquiring the real-time torque and the real-time rotating speed of the head motor and sending the real-time torque and the real-time rotating speed to the processing unit of the programmable controller, and the second electrical parameter acquisition module is used for acquiring the real-time torque and the real-time rotating speed of the tail motor and sending the real-time torque and the real-time rotating speed to the processing unit of the programmable controller.
Furthermore, the programmable controller processing unit is in wireless communication with the industrial personal computer, and the programmable controller processing unit sends the real-time torque, the real-time rotating speed and the real-time output power of the head motor, the real-time torque, the real-time rotating speed and the real-time output power of the tail motor, the real-time pressure applied to the scraper and the real-time strain value of the scraper chain to the industrial personal computer for display and storage.
Furthermore, the programmable controller processing unit is communicated with the upper computer in a remote mode through an Ethernet ring network, and sends the real-time torque, the real-time rotating speed and the real-time output power of the head motor, the real-time torque, the real-time rotating speed and the real-time output power of the tail motor, the real-time pressure applied to the scraper and the real-time strain value of the scraper chain to the upper computer for displaying and storing.
The invention has the beneficial effects that:
1) the invention adopts a dual-drive mode, and solves the problem that the single-drive scraper conveyor cannot meet the system requirement in the process of high-power transportation;
2) according to the invention, the tail motor of the scraper conveyor is controlled by using the frequency converter according to the records of the pressure sensor and the strain sensor, so that the dynamic balance of the power of the tail motor and the head motor in the working process is realized;
3) when the scraper conveyor works, a head motor needs to bear larger working pressure, so that the head motor is overheated or even damaged, and the working life of the head motor is influenced;
4) the programmable controller processing unit not only can feed the current working condition of the scraper conveyor back to a field industrial personal computer for displaying, but also can feed signals back to an upper computer of a control center through an Ethernet ring network for realizing remote display and data processing, the upper computer arranged in the control center can remotely rewrite the program of the programmable controller processing unit, and the control program is arranged according to the actual condition to ensure stable operation.
Additional features and advantages of the invention will be set forth in part in the detailed description which follows.
Drawings
FIG. 1 is a schematic structural diagram of a dual drive scraper conveyor according to an embodiment of the present invention;
FIG. 2 is a partial flow diagram of the operation of a dual drive flight conveyor according to an embodiment of the present invention;
FIG. 3 is a layout diagram of a strain sensor provided by an embodiment of the present invention;
FIG. 4 is a control program diagram of a programmable controller processing unit provided by an embodiment of the invention;
FIG. 5 is a schematic diagram of a dual drive scraper conveyor according to an embodiment of the present invention for use in medium heave conditions;
FIG. 6 is a schematic diagram of a dual-drive scraper conveyor according to an embodiment of the present invention for a working condition with a large head inclination angle;
FIG. 7 is a schematic diagram of a dual drive scraper conveyor according to an embodiment of the present invention for a low head inclination condition;
FIG. 8 is a schematic illustration of a dual drive flight conveyor for horizontal bend conditions according to an embodiment of the present invention.
Reference numerals in the drawings of the specification include:
1-machine head chain wheel, 2-machine tail chain wheel, 3-machine tail motor, 4-machine head motor, 5-pressure sensor, 6-strain sensor, 7-scraper, 8-round-link chain and 9-scraper chain.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection through an intermediate medium, and those skilled in the art will understand the specific meaning of the terms as they are used in the specific case. Furthermore, the terms "a" and "an" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In order to solve the problems of the prior art, as shown in fig. 1 to 8, the present invention provides a dual-drive scraper conveyor, including:
a head motor 4 mounted to the head sprocket 1;
the tail motor 3 is arranged on the tail chain wheel 2, and the tail motor 3 is connected with the frequency converter;
the scraper 7 is arranged on a scraper chain 9, and the scraper chain 9 is sleeved outside the machine head chain wheel 1 and the machine tail chain wheel 2; and
the control system comprises a programmable controller processing unit connected with a frequency converter, a first electrical parameter acquisition module arranged on a head motor 4, a second electrical parameter acquisition module arranged on a tail motor 3, a plurality of pressure sensors 5 arranged on a scraper 7 and a plurality of strain sensors 6 arranged on a scraper chain 9; the first electrical parameter acquisition module acquires the real-time output power of a head motor 4, the second electrical parameter acquisition module acquires the real-time output power of a tail motor 3, the pressure sensor 5 acquires the real-time pressure on a scraper 7, and the strain sensor 6 acquires the real-time strain value of a scraper chain 9, and all the values are sent to the processing unit of the programmable controller; the programmable controller processing unit controls the frequency converter to work through a built-in program, and further controls the output power of the machine tail motor 3, so that the output power of the machine head motor 4 and the output power of the machine tail motor 3 are dynamically balanced.
Specifically, the first electrical parameter acquisition module acquires the real-time output power of the head motor 4 and sends the real-time output power to the programmable controller processing unit, the second electrical parameter acquisition module acquires the real-time output power of the tail motor 3 and sends the real-time output power to the programmable controller processing unit, the pressure sensor 5 acquires the real-time pressure applied to the scraper 7 and sends the real-time pressure to the programmable controller processing unit, and the strain sensor 6 acquires the real-time strain value of the scraper chain 9 and sends the real-time strain value to the programmable controller processing unit.
As shown in fig. 1 and fig. 2, the present invention provides power for the operation of the scraper conveyor through the head motor 4 and the tail motor 3, the head motor 4 drives the head sprocket 1, and the tail motor 3 drives the tail sprocket 2, so as to realize dual drive, and the problem of insufficient power under the condition of heavy load operation of the scraper conveyor driven by a single motor is solved by using dual drive, and the programmable controller processing unit is used for reading the information of the electric parameter acquisition module i and the electric parameter acquisition module ii, analyzing the working conditions of the head motor 4 and the tail motor 3, and then controlling the output power of the tail motor 3 by using the frequency converter, so as to realize dynamic balance of the operation of the head motor 4 and the tail motor 3, avoid the damage of the head motor 4 due to heavy load, and improve the reliability of the whole operation of the system. In this embodiment, first electrical parameter collection module sets up in the inside of aircraft nose motor 4, second electrical parameter collection module sets up in the inside of tail motor 3, first electrical parameter collection module and second electrical parameter collection module all link to each other with programmable controller processing unit, programmable controller processing unit can adopt PLC, programmable controller processing unit links to each other with the converter, the output of converter control tail motor 3, realize the dynamic balance of aircraft nose motor 4 and tail motor 3 work, tail motor 3 shares partial operating pressure for aircraft nose motor 4, prevent that aircraft nose motor 4 workload is too big to lead to the trouble.
As shown in fig. 1 to 4, the programmable controller processing unit controls the output power of the tail motor 3 through a built-in program, and includes the following steps:
(1) if the real-time pressure collected by the pressure sensor 5 is less than or equal to the pressure set value and the real-time strain value collected by the strain sensor 6 is less than or equal to the strain set value, the programmable controller processing unit controls the real-time output power P of the tail motor 3 Tail Keeping the same;
(2) if the real-time pressure collected by the pressure sensor 5 is larger than the pressure set value and/or the real-time pressure collected by the strain sensor 6 is larger than the pressure set valueWhen the variable value is larger than the set strain value, the programmable controller processing unit determines the adjusting power P of the tail motor 3 according to the formula Regulating ：
P Regulating ＝Ae ax+b +B 1 +Ay+B 2 +c 0 －P Machine head ；
In the formula, P Regulating The power of the tail motor 3 is adjusted; a is a motor fluctuation coefficient (a constant number is preset according to the motor model, and the models of the head motor 4 and the tail motor 3 are consistent); e is a natural logarithm (mathematical constant); a is a compensation coefficient of the pressure sensors 5 (a is greater than or equal to 1 set according to the arrangement number and the interval of the pressure sensors 5); x is the real-time pressure collected by the pressure sensor 5; b is the pressure sensitive coefficient (typically 0) of the strain sensor 6; b is 1 Is a compensation value of the pressure sensor 5 (a constant can be a negative value, which is preset according to the characteristics of the pressure sensor 5); y is a real-time strain value acquired by the strain sensor 6; b is 2 A compensation value of the strain sensor 6 (a constant may be a negative value, which is preset according to the characteristics of the strain sensor 6); c. C 0 An initial value of power compensation (preset according to an installation inclination angle and working requirements); p Machine head The real-time output power of the handpiece motor 4;
the programmable controller processing unit adjusts the power P according to the tail motor 3 Regulating The following judgment is made:
if P is Regulating ＝P Tail The programmable controller processing unit controls the real-time output power P of the tail motor 3 Tail Remains unchanged, P Tail For real-time output power P of tail motor 3 Tail ；
If P is Regulating ≠P Tail The programmable controller processing unit controls the real-time output power P of the tail motor 3 Tail Adjusted to the regulated power P of the tail motor 3 Regulating The programmable controller processing unit adjusts the output power of the machine tail motor 3 according to the real-time output power of the machine head motor 4, so that the power balance between the machine tail motor 3 and the machine head motor 4 is realized, and the working load of the machine head motor 4 is reduced.
The first electrical parameter acquisition module also acquires the real-time torque and the real-time rotating speed of the head motor 4 and sends the real-time torque and the real-time rotating speed to the programmable controller processing unit, the second electrical parameter acquisition module also acquires the real-time torque and the real-time rotating speed of the tail motor 3 and sends the real-time torque and the real-time rotating speed to the programmable controller processing unit, the real-time torque and the real-time rotating speed of the head motor 4 and the real-time torque and the real-time rotating speed of the tail motor 3 are used for monitoring whether the scraper conveyor works normally or not, if the real-time torque and the real-time rotating speed of the head motor 4 and/or the real-time torque and the real-time rotating speed of the tail motor 3 suddenly change, the programmable controller processing unit judges that the scraper conveyer works abnormally, the programmable controller processing unit sends out an alarm, and the prior art is adopted for judging the sudden change of the real-time torque and the real-time rotating speed of the head motor 4 and/or the real-time torque and the real-time rotating speed of the tail motor 3.
The programmable controller processing unit is in wireless communication with the industrial personal computer, the programmable controller processing unit sends the real-time torque, the real-time rotating speed and the real-time output power of the head motor 4, the real-time torque, the real-time rotating speed and the real-time output power of the tail motor 3, the real-time pressure on the scraper 7 and the real-time strain value of the scraper chain 9 to the industrial personal computer for display and storage, so that field workers can observe the working states of the scraper conveyor, the head motor 4 and the tail motor 3 in real time, and the working process can be effectively monitored.
The programmable controller processing unit is also communicated with an upper computer in a remote way through an Ethernet ring network, the programmable controller processing unit sends the real-time torque, the real-time rotating speed and the real-time output power of the head motor 4, the real-time torque, the real-time rotating speed and the real-time output power of the tail motor 3, the real-time pressure of the scraper 7 and the real-time strain value of the scraper chain 9 to the upper computer for displaying and storing, and personnel in a control center can monitor the real-time working states of the scraper conveyor, the head motor 4 and the tail motor 3 at a far end, modify a control program in the programmable controller processing unit through the upper computer of the control center, and control the work of the scraper conveyor according to actual needs.
The working principle of the double-drive scraper conveyor comprises the following steps:
the machine head motor 4 and the machine tail motor 3 are used for driving the machine head chain wheel 1 and the machine tail chain wheel 2, so that the control of a dual-drive system is realized, and the machine head chain wheel 1 and the machine tail chain wheel 2 are driven by double drives in the working process, so that the defect that the load is overlarge under the condition of large transportation capacity and the working requirement cannot be met by only adopting single motor drive is overcome, and the conveying capacity of the scraper conveyor is improved by using a dual-drive mode;
the head motor 4 and the tail motor 3 are respectively provided with an electric parameter acquisition module I and an electric parameter acquisition module II, the electric parameter acquisition module I and the electric parameter acquisition module II are communicated with a programmable controller processing unit, real-time working parameters (real-time torque, real-time rotating speed and real-time output power) of the head motor 4 and real-time working parameters (real-time torque, real-time rotating speed and real-time output power) of the tail motor 3 are transmitted to the programmable controller processing unit, the programmable controller processing unit can be communicated with a frequency converter, the frequency converter is electrically connected with the tail motor 3, the tail motor 3 is controlled by the frequency converter, the programmable controller processing unit can feed back the current running conditions of the head motor 4 and the tail motor 3 to realize field data display, and the working state of the dual-drive scraper conveyor is recorded according to the pressure sensor 5 and the strain sensor 6, the remote upper computer can read the data information of the current programmable controller processing unit through the Ethernet ring network, can send instructions to the programmable controller processing unit according to actual needs, modify programs, and adjust the real-time output power of the scraper conveying work and the head motor 4 and the tail motor 3 according to actual needs, so that remote real-time control is realized, and the safety and the real-time performance of the system are improved;
the scraper 7 monitors the load of the conveyor in real time through a plurality of uniformly distributed pressure sensors 5, the scraper 7 is arranged on a scraper chain 9, a surface mount area is polished on the surface of a straight section of a ring chain 8 of the scraper chain 9, a strain sensor 6 is arranged to monitor the integral strain of the scraper chain 9 in real time, if the real-time pressure is greater than a pressure set value and/or the real-time strain value is greater than a strain set value, a programmable controller processing unit adjusts the output power of a machine tail motor 3 through a frequency converter, the dynamic balance of the power of the machine tail motor 3 and the machine head motor 4 in the working process is realized, the damage of the machine head motor 4 caused by the overlarge bearing load and operation resistance of the machine head motor 4 is prevented, the machine tail motor 3 provides power to relieve the working load of the machine head motor 4 to a certain extent, the machine head motor 4 is prevented from being out of failure, and the overall working reliability of the system is improved, the stable operation is ensured.
The dual-drive scraper conveyor can be applied to the following working conditions:
as shown in fig. 5, when the dual-drive scraper conveyor of the invention is used in a medium fluctuation condition, the irregular protrusion at the bottom of a roadway is very common, the protrusion part may collide with a scraper chain 9 below the scraper conveyor, although the influence on the whole operation is not great, the frequent impact also generates a pulling force to increase the system load, and meanwhile, the material is transported to the protrusion high point and tends to move towards the nose due to inertia, so that the impact will be brought to the nose part, and the pressure is also present in the high point downward movement process, so that the load of the nose part is too large, the load of the nose motor 4 is large, the damage is easily caused, and if the damage is easily caused by adopting stable transition, the working pressure of the nose part can be shared by adjusting the output power of the tail motor 3, and the system can be ensured to operate more stably and reliably.
As shown in fig. 6, when the dual-drive scraper conveyor of the present invention is used in a working condition where the inclination angle α of the head of the machine is large, the inclination angle of the position where the head motor 4 is located is large, and the required upward pulling force is large, so that the required working power of the motor is relatively large, and the tail motor 3 needs to be used for compensating the work, so as to realize the dynamic balance of the work of the head and the tail of the machine, and the compensation is performed by using the power increasing mode of the tail motor 3, so as to effectively prevent the head motor 4 from being overloaded, which causes the failure or even burning of the head motor 4.
As shown in fig. 7, when the dual-drive scraper conveyor of the invention is used in a working condition that the installation inclination angle α of the head part is small, the installation inclination angle α of the head motor 4 is an acute angle formed by a connecting line of the geometric centers of the head chain wheel 1 and the tail chain wheel 2 and a horizontal plane, the inclination angle of the head motor 4 is small, and at a position where the inclination angle is obviously changed, a component force in the material gravity direction of the scraper conveyor can drag the scraper chain 9, and the current working load of the head motor 4 must be increased, so that the normal work of the motor can be influenced, the output power of the tail motor 3 is adjusted according to the strain on the scraper chain 9, and the working stability of the whole system can be prevented from being influenced by the overlarge working load of the head motor 4.
As shown in fig. 8, when the dual-drive scraper conveyor of the present invention is used in a horizontal bending condition, due to the structural reasons of the roadway, the horizontal bending cannot be avoided, and the impact phenomenon inevitably exists at the bending position, the impact generation easily causes the damage of the scraper conveyor scraper 7 and the scraper chain 9, and also easily causes the material loss, which affects the operation reliability and safety, the output power of the tail motor 3 is adjusted, so that the working process of the scraper conveyor is relatively stable, the influence of the vibration and the impact in the operation process on the system work is prevented, and the influence of the material falling on the production economy is prevented;
under the above-mentioned complicated operating mode condition, for avoiding the aircraft nose load too big, aircraft nose motor 4 load is great to cause the damage, can be through the output who adjusts aircraft tail motor 3, share aircraft nose's operating pressure, programmable controller processing unit continues real time monitoring current behavior simultaneously, and based on the data of pressure sensor 5 and strain sensor 6 collection, realize communication through the converter and carry out real time regulation and control to aircraft tail motor 3, make the power of aircraft tail motor 3 and aircraft nose motor 4 according to load condition dynamic balance, guarantee that the system can more steady reliable operation.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. A dual drive scraper conveyor, comprising:
a head motor mounted to the head sprocket;
the tail motor is arranged on a tail chain wheel and is connected with the frequency converter;
the scraper is arranged on a scraper chain, and the scraper chain is sleeved outside the machine head chain wheel and the machine tail chain wheel; and
the control system comprises a programmable controller processing unit connected with the frequency converter, a first electrical parameter acquisition module arranged on a machine head motor, a second electrical parameter acquisition module arranged on a machine tail motor, a plurality of pressure sensors arranged on the scraper and a plurality of strain sensors arranged on the scraper chain; the first electrical parameter acquisition module acquires the real-time output power of a head motor, the second electrical parameter acquisition module acquires the real-time output power of a tail motor, the pressure sensor acquires the real-time pressure on a scraper, and the strain sensor acquires the real-time strain value of a scraper chain, and all the real-time output power, the real-time pressure and the real-time strain value are sent to the processing unit of the programmable controller; the programmable controller processing unit controls the frequency converter to work through a built-in program, and further controls the output power of the machine tail motor, so that the output power of the machine head motor and the output power of the machine tail motor are dynamically balanced.
2. The dual drive flight conveyor of claim 1, wherein the programmable controller processing unit controls the output power of the tail motor via a built-in program, comprising the steps of:
(1) if the real-time pressure collected by the pressure sensor is less than or equal to the pressure set value and the real-time strain value collected by the strain sensor is less than or equal to the strain set value, the programmable controller processing unit controls the real-time output power P of the tail motor Tail Keeping the same;
(2) if the real-time pressure acquired by the pressure sensor is greater than the pressure set value and/or the real-time strain value acquired by the strain sensor is greater than the strain set value, the programmable controller processing unit determines the adjusting power P of the tail motor through the following formula Regulating ：
P Regulating ＝Ae ax+b +B 1 +Ay+B 2 +c 0 －P Machine head ；
In the formula, P Regulating Adjusting power of a tail motor; a is a motor fluctuation coefficient; e is a natural logarithm; a is a compensation coefficient of the pressure sensor; x is the real-time pressure collected by the pressure sensor; b is the pressure sensitive coefficient of the strain sensor; b is 1 Is a compensation value of the pressure sensor; y is a real-time strain value acquired by the strain sensor; b is 2 Is a compensation value of the strain sensor; c. C 0 Compensating the initial value for the power; p Machine head Outputting power for the motor of the machine head in real time;
the programmable controller processing unit adjusts the power P according to the tail motor Regulating The following judgment is made:
if P is Regulating ＝P Tail The programmable controller processing unit controls the real-time output power P of the tail motor Tail Keeping the same;
if P is Regulating ≠P Tail The programmable controller processing unit controls the real-time output power P of the tail motor Tail Adjusted to the regulated power P of the tail motor Regulating 。
3. The dual-drive scraper conveyor of claim 1 or 2, wherein the first electrical parameter acquisition module is further configured to acquire a real-time torque and a real-time rotational speed of the head motor and send the real-time torque and the real-time rotational speed to the programmable controller processing unit, and the second electrical parameter acquisition module is further configured to acquire a real-time torque and a real-time rotational speed of the tail motor and send the real-time torque and the real-time rotational speed to the programmable controller processing unit.
4. The dual-drive scraper conveyor of claim 3, wherein the programmable controller processing unit is in wireless communication with the industrial personal computer, and the programmable controller processing unit sends the real-time torque, the real-time rotating speed and the real-time output power of the head motor, the real-time torque, the real-time rotating speed and the real-time output power of the tail motor, the real-time pressure applied to the scraper, and the real-time strain value of the scraper chain to the industrial personal computer for display and storage.
5. The dual-drive scraper conveyor of claim 3, wherein the programmable controller processing unit further communicates with the upper computer via an Ethernet ring network, and sends the real-time torque, the real-time rotation speed and the real-time output power of the head motor, the real-time torque, the real-time rotation speed and the real-time output power of the tail motor, the real-time pressure applied to the scraper, and the real-time strain value of the scraper chain to the upper computer for display and storage.
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