阅读说明：本技术 一种斗轮堆取料机的动态性能测试模拟实验平台 (Dynamic performance test simulation experiment platform of bucket-wheel stacker reclaimer ) 是由 姜永正 夏启航 刘炽健 于 2019-10-16 设计创作，主要内容包括：斗轮堆取料机的动态性能测试模拟实验平台,由斗轮调速系统、斗轮挖掘力测量系统、斗轮臂振动测量系统、斗轮臂应力测量系统、填料槽落料冲击载荷测量系统和驱动电机电流测量系统组成,具体包括一个斗轮堆取料机缩尺模型、微型计算机1、数据采集卡2、电流表3、应变片4、可调速电机5、环形力传感器6、加速度传感器7和电涡流位移传感器8,可以实现斗轮堆取料机的调速,斗轮堆取料机取料挖掘力测量,斗轮臂的振幅以及振动加速度的信号提取,斗轮臂的关键部位应力实时监测,提取落料冲击力的时间历程曲线,以及电机平稳运作时的电流。(A dynamic performance test simulation experiment platform of a bucket-wheel stacker-reclaimer comprises a bucket-wheel speed regulation system, a bucket-wheel digging force measurement system, a bucket-wheel arm vibration measurement system, a bucket-wheel arm stress measurement system, a filler groove blanking impact load measurement system and a drive motor current measurement system, and specifically comprises a bucket-wheel stacker-reclaimer reduced scale model, a microcomputer 1, a data acquisition card 2, an ammeter 3, a strain gauge 4, an adjustable speed motor 5, an annular force sensor 6, an acceleration sensor 7 and an eddy current displacement sensor 8, and can realize the speed regulation of the bucket-wheel stacker-reclaimer, the bucket-wheel stacker-reclaimer digging force measurement, the signal extraction of the amplitude and the vibration acceleration of a bucket-wheel arm, the real-time stress monitoring of key parts of the bucket-wheel arm, the extraction of a time history curve of blanking impact force and the current when the motor operates stably.)

1. The dynamic performance test simulation experiment platform of the bucket-wheel stacker reclaimer comprises a bucket-wheel speed regulating system, a bucket-wheel excavating force measuring system, a bucket-wheel arm vibration measuring system, a bucket-wheel arm stress measuring system, a filler groove blanking impact load measuring system and a driving motor current measuring system, and specifically comprises a bucket-wheel stacker reclaimer reduced scale model, a microcomputer, a data acquisition card, an ammeter, a strain gauge, an adjustable speed motor, a force sensor, an acceleration sensor and an eddy current displacement sensor.

2. The bucket-wheel speed regulating system designed according to claim 1 comprises a bucket wheel, a speed regulating motor, a bearing, a coupler and a speed reducer, wherein the motor is externally connected with the speed reducer and is connected with the bucket wheel through the coupler, and the bearing plays a supporting role.

3. The bucket wheel excavation force measurement system of claim 1, comprising the bucket wheel, the annular force sensor, the connection line, the data acquisition card, and the microcomputer, wherein the annular force sensor is connected to the bucket wheel by bolts and is connected to the microcomputer via the data acquisition card.

4. The system for measuring the vibration of the arm of the bucket wheel according to claim 1, comprising the arm of the bucket wheel, the acceleration sensor, the eddy current displacement sensor, a connecting wire, a data acquisition card and a microcomputer, wherein the acceleration sensor and the eddy current displacement sensor are connected with the arm of the bucket wheel and are connected with the microcomputer through the data acquisition card.

5. The stress measuring system of the bucket wheel arm designed according to claim 1 comprises the bucket wheel arm, the strain gauge, the connecting wire, the data acquisition card and the microcomputer, wherein the strain gauge is arranged at the bolt connection part of the bucket wheel arm and the inclined pull rod and the bucket wheel arm and the bracket and is connected into the microcomputer through the data acquisition card.

6. The system for measuring blanking impact load of the filler trough designed according to claim 1 comprises the filler trough, the annular force sensor, a connecting wire, a data acquisition card and a microcomputer, wherein the annular force sensor is connected with the filler trough and is connected into the microcomputer through the data acquisition card.

7. The drive motor current measuring system designed according to claim 1 comprises a speed regulating motor, an ammeter and a connecting wire, wherein the ammeter is connected with the speed regulating motor through the connecting wire.

Technical Field

The invention belongs to the field of engineering machinery, and particularly relates to a dynamic performance simulation experiment platform of a bucket-wheel stacker reclaimer.

Background

The bucket-wheel stacker-reclaimer has the advantages of production efficiency, simple operation, easy realization of modern control and the like, becomes an ideal excavating and transporting machine in continuous operation equipment, is also one of the largest complete sets of equipment integrating excavating, fetching and transporting in the world, has severe working environment and complex and changeable excavating objects, and has the advantages of remarkable vibration problem, serious threat to normal operation and operation performance, even serious structural failure and even accidents caused by various dynamic loads such as dynamic excavating resistance, dynamic unbalanced load of bucket-wheel rotation, intermittent impact load of blanking and the like in material taking operation besides power source excitation. Therefore, it is very important to carry out dynamic performance test on the bucket-wheel stacker reclaimer, however, the bucket-wheel stacker reclaimer is too big in size in the factory, and is very inconvenient to the dynamic performance test experiment, in order to overcome the above difficulty, so design a dynamic performance test simulation experiment platform of bucket-wheel stacker reclaimer and be used for the analysis of performance, through adding the foil gage, adjustable speed motor, force transducer, acceleration sensor for measure physical quantities such as the atress condition and natural frequency of each part under different operational conditions.

Disclosure of Invention

In order to solve the problems, the dynamic performance test simulation experiment platform of the bucket-wheel stacker reclaimer is designed, and comprises a bucket-wheel speed regulating system, a bucket-wheel excavating force measuring system, a bucket-wheel arm vibration measuring system, a bucket-wheel arm stress measuring system, a packing groove blanking impact load measuring system and a driving motor current measuring system.

The specific contents of each system are as follows.

The bucket wheel speed regulating system comprises a bucket wheel, a speed regulating motor, a bearing, a coupler and a speed reducer, wherein the motor is externally connected with the speed reducer and is connected with the bucket wheel through the coupler, and the bearing plays a supporting role.

The bucket-wheel excavation force measuring system comprises a bucket wheel, an annular force sensor, a connecting wire, a data acquisition card and a microcomputer, wherein the annular force sensor is connected with a bucket-wheel excavation bucket bolt and is connected into the microcomputer through the data acquisition card.

The bucket wheel arm vibration measurement system comprises a bucket wheel arm, an acceleration sensor, an eddy current displacement sensor, a connecting wire, a data acquisition card and a microcomputer, wherein the acceleration sensor and the eddy current displacement sensor are connected with the bucket wheel arm and are connected into the microcomputer through the data acquisition card.

The stress measuring system of the bucket wheel arm comprises the bucket wheel arm, a strain gauge, a connecting wire, a data acquisition card and a microcomputer, wherein the strain gauge is arranged at the bolt connecting part of the bucket wheel arm and the diagonal draw bar and the bucket wheel arm and the bracket and is connected into the microcomputer through the data acquisition card.

The system for measuring blanking impact load of the packing groove comprises the packing groove, an annular force sensor, a connecting wire, a data acquisition card and a microcomputer, wherein the annular force sensor is connected with the packing groove and is connected into the microcomputer through the data acquisition card.

The drive motor current measuring system comprises a speed regulating motor, an ammeter and a connecting wire, wherein the ammeter is connected with the speed regulating motor through the connecting wire.

The system is connected with a microcomputer through various sensors and a parallel data acquisition card, and a bucket wheel speed regulating system realizes a motor speed regulating simulation experiment and can measure the rotating speed of a bucket wheel; the excavation force measurement simulation experiment is realized through the bucket-wheel excavation force measurement system, so that the pressure at the bucket-wheel bucket connection part is measured; measuring the vibration displacement and the vibration acceleration of the bucket wheel arm by a vibration measurement simulation experiment of a bucket wheel arm vibration measurement system; the stress measurement simulation experiment is carried out by the bucket wheel arm stress measurement system, so that the maximum stress of the bucket wheel arm can be measured; the material-feeding impact load measuring system of the packing groove can perform impact load simulation experiments and draw a time-force function curve of the packing groove when the material falls; the current magnitude of the motor when the motor operates stably is measured by a motor current simulation measurement experiment carried out by driving a motor current measurement system.

The advantages of the simulation experiment table of the bucket-wheel stacker reclaimer are as follows.

The invention refers to the structure of the actual bucket-wheel stacker-reclaimer system, the basic structural form is consistent with that of the actual bucket-wheel stacker-reclaimer system, and the simulation performance analysis is carried out on the basis and is consistent with the actual running state.

The rotating speed of the rotating wheel can be adjusted by using the speed-adjustable motor, so that a plurality of groups of experimental data can be obtained.

The bucket can fill different materials, can simulate the experiment that actual bucket-wheel stacker reclaimer was gathered different materials.

The length of accessible adjustment cable-stay pole, position, and then change the contained angle of bucket wheel arm and ground, obtain multiunit experimental data.

Drawings

Fig. 1 is an overall three-dimensional schematic diagram of a simulation experiment platform of a bucket-wheel stacker-reclaimer.

FIG. 2 is a schematic diagram of a bucket wheel governing system.

FIG. 3 is a schematic diagram of a bucket wheel excavation force measurement system.

FIG. 4 is a schematic diagram of a bucket wheel arm vibration measurement system.

FIG. 5 is a schematic diagram of a bucket arm stress measurement system.

FIG. 6 is a schematic view of a system for measuring impact load of blanking of a stuffing box.

FIG. 7 is a schematic view of a drive motor current measurement system.

FIG. 8 is a graph of bucket wheel excavation force measurement data.

FIG. 9 is a graph of drive current measurement data.

Detailed Description

The invention will be further explained with reference to the drawings.

The figure is 1 shown as a performance analysis simulation experiment platform of a bucket-wheel stacker-reclaimer, which comprises a bucket-wheel stacker-reclaimer, a microcomputer 1, a data acquisition card 2, an ammeter 3, a strain gauge 4, an adjustable speed motor 5, an annular force sensor 6, an acceleration sensor 7, an eddy current displacement sensor 8, and a bucket-wheel stacker-reclaimer consisting of a bucket wheel 9, a bucket-wheel arm 10, a diagonal draw bar 11, a packing groove 12, a bracket 13 and a motor 5, wherein the bottom of the bracket is provided with four iron bottom plates with the thickness of 10mm and is fixed with the ground by bolting down bolts, the bracket 13 is integrally formed by cutting two steel plates with the thickness of 10mm and is welded into a whole by I-steels with the same thickness of 10mm, T-shaped steels for reinforcing the thickness of 10mm are welded on the two outer sides, the bucket-wheel arm consists of a cross beam and a longitudinal beam, the longitudinal beam is formed by welding a plurality of I-shaped steels with the thickness of 0.8mm, and a plurality of small I, three groups of large I-beams with the thickness of 2.6mm are sequentially arranged into a herringbone to be welded on the small I-beams to play a role in reinforcement, the front end of a bucket wheel arm 10 is connected with a diagonal draw bar 11 by bolts, the rear end of the bucket wheel arm 10 is connected with the middle part of a bracket 13 by bolts, the upper end of the bracket 13 is connected with the diagonal draw bar 11 with the thickness of 10mm by bolts, the length of the diagonal draw bar 11 can be changed for adjusting the included angle between the bucket wheel arm 10 and the ground so as to adjust the position of a bucket wheel 9, a bucket wheel 9 main body is formed by welding a plurality of inner circular rings with the thickness of 1mm, an inner disc with the thickness of 1mm and two large circular rings with the thickness of 0.8mm measured outside, the two large circular rings on the outside are connected by square through holes, in addition, 9 buckets 14 with the thickness of 1.5mm on the outside are connected with the large circular rings on the outside by bolts, a filler groove is formed by bending a steel plate with the thickness of 2mm, and the filler groove 12 is connected, the inner circle of the bucket wheel 9 is connected with the rotating shaft of the motor 5 and is driven by the motor 5 to rotate.

FIG. 2 is a schematic diagram of a bucket wheel speed control system, which comprises a bucket wheel 9, a speed control motor 5, a bearing 15 and a coupling 16, wherein the motor is connected with the bucket wheel 9 through the coupling 16 and plays a supporting role through the bearing 15, the bucket wheel 9 body is formed by connecting a plurality of iron inner rings with the thickness of 1mm, an iron inner disc with the thickness of 1mm and two iron large rings measured outside through welding, one outer large ring with the thickness of 0.8mm is connected with the inner rings and the inner discs, the other large disc with the thickness of 2mm is connected with a large disc with the thickness of 10mm through a bent square through hole with the thickness of 1mm, in addition, 9 buckets 14 are connected with the outer large rings through bolts, the speed control motor 5 is connected with the bucket wheel 9, the inner circle of the bucket wheel 9 is connected with a rotating shaft of the motor 5 and is driven to rotate by the motor 5, and the bucket wheel 9 can be driven to rotate under the condition of different rotating speeds by adjusting the rotating frequency of the motor 5, and (5) carrying out a material collection simulation experiment, wherein the speed regulation range of the motor 5 is (0-1000) r/min.

FIG. 3 is a schematic view of a bucket wheel excavation force measuring system, which includes a bucket wheel 9, an LTH500 ring force sensor 6, a connecting line A1, a data acquisition card 2 and a microcomputer 1, wherein the ring force sensor 6 is connected with a bucket wheel 14 through bolts, the data acquisition card 2 is connected into the microcomputer 1, 9 buckets 14 are formed by bending steel plates with the thickness of 1.5mm in the same drawing, screw holes are welded on two sides and the rear side of each bucket wheel for fixing on a large circular ring, the LTH500 ring force sensor 6 is arranged at three bolt openings, and the sensitivity of the sensor is 2mv/ms^-2And maximum deformationIs 0.0508mm, meanwhile, the LTH500 annular force sensor 6 is connected with the data acquisition card 2, the data acquisition card 2 is connected with the microcomputer 1, the DEWESOFT7 test system calculates the force, and the test result is shown in figure 8.

FIG. 4 is a schematic diagram of a bucket wheel arm vibration measurement system, which includes a bucket wheel arm 10, an ICP acceleration sensor 7, an eddy current displacement sensor 8, a connection line A2, a data acquisition card 2 and a microcomputer 1, wherein the ICP acceleration sensor 7, the eddy current displacement sensor 8 and the bucket wheel arm 10 are connected, and are connected to the microcomputer 1 and the ICP acceleration sensor 7 through the data acquisition card 2, and the sensitivity of the sensors is 1.02mv/ms^-2The frequency response range is 1-20Hz, the excitation device is 8206-, the first, second and third order vibration modes of the cantilever-bucket wheel structure are torsional bending of the front end of the bucket wheel arm 10, the inherent frequencies of the first, second and third order vibration modes are 1.1HZ, 1.4HZ and 3.5HZ respectively, the fourth order vibration mode of the cantilever-bucket wheel structure is torsional bending of the middle end of a diagonal draw bar, and the inherent frequency of the fourth order vibration mode is 4.0 HZ.

Fig. 5 is a schematic diagram of a stress measurement system of a bucket wheel arm, which includes a bucket wheel arm 10, a strain gauge 4, a connection line a3, a data acquisition card 2 and a microcomputer 1, wherein the strain gauge 4 is installed at the bolt connection between the bucket wheel arm 10 and a diagonal member 11 and between the bucket wheel arm 10 and a bracket 13, and the strain gauge 4 is connected to the data acquisition card 2, and then connected to the data acquisition card 2 and analyzed and tested by the microcomputer 1 through a Reflex test system.

Fig. 6 is a schematic diagram of a filler groove blanking impact load measurement, which includes a filler groove 12, an LTH500 annular force sensor 6, a connecting line a4, a data acquisition card 2 and a microcomputer 1, wherein the LTH500 annular force sensor 6 is connected with the filler groove 12 and is connected into the microcomputer 1 through the data acquisition card 2, the filler groove 12 is formed by bending a steel plate with the thickness of 2mm, the filler groove 12 is connected with a bucket wheel arm 10 through a T-shaped steel with the thickness of 2.6mm, the LTH500 annular force sensor 6 is connected with the lower portion of the filler groove 12, the LTH500 annular force sensor 6 is connected with the data acquisition card 2 and is connected into the microcomputer 1, then an adjustable speed motor 5 is started, the force is calculated through a DEWESOFT7 test system, and the force is used for measuring the impact force when materials fall into the filler groove 12 at different rotating speeds and different materials can be replaced for experiments.

Fig. 7 is a schematic diagram of a current measuring system of a driving machine, which includes an adjustable speed motor 5, an ammeter 3, and a connecting line a5, wherein the ammeter 3 is connected to the adjustable speed motor 5 through the connecting line a5, after the motor 5 is started for a period of time, the current is measured by the ammeter 3, and the motor current reaches the level shown in fig. 9 through the ammeter test.