CN103674469A - Experimental method for coupling pipe network operating characteristics of mine fans and device thereof - Google Patents
Experimental method for coupling pipe network operating characteristics of mine fans and device thereof Download PDFInfo
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Abstract
Provided are an experimental method for coupling pipe network operating characteristics of mine fans and a device thereof. A variable frequency regulation method is applied to obtain variable frequency operating characteristics of a varied frequency mine fan; a throttling governing method is applied to obtain operating characteristics of a power frequency and throttling mine fan or operating characteristics of a variable frequency and throttling mine fan; blade angles of the fans are adjusted, adjustment methods that power frequency and throttling or variable frequency and throttling are combined, and operating characteristics of a varied blade angle coupling and varied frequency mine fan are obtained; a method that static pressure ring devices are arranged along stokes is adopted, throttling measures are implemented, pipeline stroke-along flow parameters are obtained, and numerical value displaying features of characteristic parameters of a varied blade angle and varied frequency mine fan on stroke-along pipelines are obtained. The device of a system comprises a power unit I, a pipeline device II, an electrical control gear III, a sensing and transmitting device IV and an automatic measuring device V. Accordingly, simulation of coupling properties between operating set of curves and dynamic ventilating pipe resistance of the mine fans is achieved.
Description
Technical field
The invention belongs to mine ventilation and chain drive Testing Technology Study field thereof, be specifically related to experimental technique and the device thereof of mine fan tube coupling network operation characteristic.
Technical background
For colliery, mine ventilation and equipment thereof are exactly its " respiratory system " and " lungs organ ".Main fan in mine is constantly supplied with fresh wind, discharges dirty wind, is " the breathing equipment " that ensures Safety of Coal Mine Production.Continuing of digging, colliery required airflow and ventilation resistance can change, the Four seasons change of terrestrial climate, the natural ventilation power value that ground is underground also can change, and adopts the rotation of accurate order of classes or grades at school, and the actual required airflow of getting working face also can change thereupon.In addition, exploiting field geologic condition has changed, and the production of face needs wind also may change thereupon; The difference of the pit mining degree of depth, above-mentioned variable quantity manifesting also in ventilating system there are differences, and mine ventilation has dynamic change characterization.The mine ventilation system of dynamic change, needs are equipped with the main fan in mine of energy dynamic adjustments.With regard to current technical merit, the operation regulative mode of main fan in mine mainly can be divided into change blade angle, frequency control and passive self-adaptation.Wherein, along with roadway extends, mine resistance can increase, required airflow may also can increase, according to the ultimate principle of fluid mechanics and fluid machinery, main fan in mine running operating point automatic sliding equals mine resistance, the passive self-adaptation of main fan in mine that Here it is to the static pressure of supplying with; Main fan in mine under passive self-adapting operation, often occur that mine resistance can effectively be overcome, but wind supply quantity is less than mine air-required volume, and still, mine is but in dangerous ventilation state; Along with the continuation of digging, the contradiction between the two supply and demand can be more and more outstanding, and the safety guarantee function of mine ventilation is almost lost, " pony hauls cart "; Can only be by changing the blade angle of mine fan, regulate its running operating point, but may there is the wind supply quantity amount of satisfying the demand again, and the static pressure of supplying with is greater than mine resistance, the operation static pressure efficiency of mine fan declines, mine fan is being wasted electric energy operation, " large horse traction dolly ".From existing bibliographical information and Field Research, from the angle of mine fan operation, " large horse traction dolly " and " pony hauls cart " alternately occur." large horse traction dolly " be the electric energy of waste just, although data are considerable, can also give full play to the security function of mine safety production; And " pony hauls cart ", wind supply quantity is less than required airflow, endangers much seriously, can not ensure the safety in production of mine, very easily brings out because of the not enough industrial accident causing of wind supply quantity, jeopardizes operating personnel's life, the equipment of down-hole and former coal resource.Therefore, regulate angle of fan leaves and passive adaptive mine fan, cannot solve the imbalance of supply and demand problem often occurring between above-mentioned mine ventilation and mine fan.Variable-frequency control technique may be the technological approaches that slows down or solve above-mentioned imbalance of supply and demand problem, but feature mine fan to changeable blade angle, how to confirm multi-angle and a certain angle, power frequency and frequency conversion, and the relation between having multiple changing angle and the changeable performance curve of the lower mine fan of changeable frequency interlock; These problems, have related to coupling operation characteristic and rule thereof that mine ventilation and equipment operation state thereof regulate.The mine fan runnability of changeable blade angle and changeable frequency, with the method for Mine Ventilation Network drag characteristic of dynamic change, the two is highly coupled.Therefore, carrying out the experimental study of the runnability coupling pipe network drag characteristic under the changeable frequency of mine fan and changeable blade angle, contribute to mine ventilation low-consumption high-efficiency, to district ventilation safety, ensure the safe and efficient production in colliery, is very significant.
At present, aspect blower performance experimental technique and equipment thereof, the actual conditions that Hu Yafei is difficult to satisfy the demand for the main blower performance test technical conditions of colliery scene, have proposed a kind of Portable all-purpose tester for performance of ventilator; Sun Mingfeng, Wang Peng and Yuan Xu measure blower performance for throttling governing method and easily produce hysteresis and unhandy problem, adopt frequency converter to drive the control method of accessory fan to replace throttle valve gear in the past, proposed blower performance test system and method for testing thereof.In addition, the Chinese scholars such as Oswald N, Kruglov Y V, Zhou Xinquan, Tan Yunzhen, Jiang Shuguang, lay particular emphasis on main fan for mines characteristic and adjusting thereof, or lay particular emphasis on the research of mine ventilation system characteristic and adjusting aspect thereof.These scholars study lessly to the two coupled characteristic, the mine fan runnability of changeable blade angle and changeable frequency is seldom discussed, angle and frequency interlock are changed to the impact on its runnability, and the relation between power frequency operation characteristic and converting operation characteristic, especially the coupled relation and between changeable mine characteristic, seldom, related experimental methods and equipment thereof are rarely seen especially in research.For this reason, the present invention proposes experimental technique and the system and device thereof of mine fan tube coupling network operation characteristic, can carry out the experiment of the mine fan of the experiment of power frequency mine fan runnability, the experiment of changeable frequency mine fan runnability, changeable blade angle and changeable frequency couple, contribute to set up the mapping relations between mine fan power frequency operation performance and converting operation performance, contribute to the changeable blade angle frequency conversion of decoupling zero mine fan performance and mine characteristic.
Summary of the invention
The present invention proposes a kind of coal mine gob microfluidic experimental technique and system and device thereof, the driving effect that can simulate goaf inside and outside differential pressure generation has been coupled the inner concentration difference effect in goaf to microfluidic field, inside, goaf, in conjunction with micro fluid dynamics and mine gas dynamics can quantitatively disclose exploiting field dynamically ventilate to goaf internal gas concentration field handle up effect and under the driving of concentration difference effect goaf internal gas concentration unstable state evolution process, and the affect rule of the two coupling on goaf internal gas concentration field.
Realize technical scheme of the present invention as follows:
Mine fan variable frequency adjustment and variable resistance couple of force close characteristic test method, and step 1, by the method for application variable frequency adjustment, is obtained the converting operation characteristic of changeable frequency mine fan; The method that step 2 regulates by application throttling, obtains the operation characteristic of power frequency and throttling mine fan or the operation characteristic of frequency conversion and throttling mine fan; Step 3 regulates fan blade angle by application, in conjunction with the regulating measure of power frequency and throttling or frequency conversion and throttling, obtains the be coupled operation characteristic of mine fan of changeable frequency of changeable blade angle; Step 4 adopts the method for arranging static pressure rings device along journey, implement water saving measures, obtain pipeline along journey flow parameter, catch the mine fan characterisitic parameter of changeable blade angle, changeable frequency at the numerical value presentation attributes along on Cheng Guandao, step 5, in conjunction with the mine fan operation characteristic of changeable blade angle, changeable frequency, realizes mine fan operation curve family and the dynamically simulation of the coupled characteristic between ventilating duct resistance.
Mine fan variable frequency adjustment and variable resistance couple of force close the device of characteristic test method, comprise propulsion system, plumbing installation, and electrical control gear, sensing becomes send device, self-operated measuring unit.
Mine fan variable frequency adjustment and variable resistance couple of force described above close the device of characteristic test method, described propulsion system, comprise that catchment port, catchment port opening part installed catchment port throttle governor part, catchment port throttle governor part, by conulite, be that main body forms, can freely advance and retreat in catchment port, catchment port is taper, and mine fan has been installed in rear end.
Above-mentioned mine fan variable frequency adjustment and variable resistance couple of force close the device of characteristic test method, described propulsion system are connected with plumbing installation by transition section, plumbing installation comprises porous rectifying device, heavy wall stainless steel pipes, standardization Flows is measured section, static pressure rings device, joint flange, the flow measurement section of having demarcated, go out stream section, hollow cone flow regulation section, porous rectifying device connects transition section and heavy wall stainless steel pipes, standardization Flows is measured section and is consisted of at least five segment standard Flows mensuration sections, the structure of every section is identical, length is 2000mm, with joint flange, connect between the two, joint flange is also the connection measure between other function pipeline sections, at standardization Flows, measure Duan Zhongjun and arranged static pressure rings device, the flow measurement section of having demarcated is arranged on after static pressure rings device, by going out stream section, is connected with hollow cone flow regulation section.
Above-mentioned mine fan variable frequency adjustment and variable resistance couple of force close the device of characteristic test method, and described mine fan is for singly revolving mine fan or counter-rotating fan.
Above-mentioned mine fan variable frequency adjustment and variable resistance couple of force close the device of characteristic test method, described sensing becomes send sub-device by humiture one sensing transducer, absolute pressure sensing transducer, revolution speed sensing transmitter, torque sensing transmitter, high precision pressure difference sensing transmitter, volumetric flow rate sensing transducer, hollow cone flow regulation section Long-distance Control regulates, electric parameter sensing transducer group before frequency conversion, electric parameter sensing transducer group after frequency conversion, humiture one sensing transducer and absolute pressure sensing transducer, in the indoor environment that a group is arranged in outside pipeline, all the other are arranged on static pressure rings device, revolution speed sensing transmitter and torque sensing transmitter are arranged on mine fan, precision pressure difference sensing transmitter is arranged in standardization Flows mensuration section, volumetric flow rate sensing transducer is arranged in flow measurement section, hollow cone flow regulation section Long-distance Control regulates has installed stepper motor and the long-range hollow cone flow regulation device that has line traffic control, be arranged in hollow cone flow regulation section.
Above-mentioned mine fan variable frequency adjustment and variable resistance couple of force close the device of characteristic test method, and described electric-controlled system device (III) can carry out the switching of power frequency and frequency conversion.
Above-mentioned mine fan variable frequency adjustment and variable resistance couple of force close the device of characteristic test method, and described automatic survey quantum devices, consists of data conversion module, industrial computer and testing software.
Above-mentioned mine fan variable frequency adjustment and variable resistance couple of force close the device of characteristic test method, described static pressure rings device, by humiture one sensing transducer, absolute pressure sensing transducer, path copper pipe, sidewall circular hole, reinforce solder joint, fixed support, adds fixing bolt, reinforced liner, static pressure out splice going splice forms.Humiture one sensing transducer and absolute pressure sensing transducer are arranged symmetrically with 2 groups and are fixed on fixed support, and sidewall circular hole is for being positioned at circular hole on path copper pipe sidewall, and its aperture is generally 0.1 times of path copper pipe; On path copper pipe, on outer side surface, hole, formed the gaging hole around ring, this gaging hole overdraught is through the flow vector direction of hole face, vertical all the time with air-flow main flow direction.
Above-mentioned mine fan variable frequency adjustment and variable resistance couple of force close the device of characteristic test method, described porous rectifying device, the outer wall of joint flange, the outer wall of heavy wall stainless steel pipes, the bolt hole of joint flange, the square hole runner of hole rectification section forms, outer wall joint flange, outer wall is the outer wall of heavy wall stainless steel pipes, bolt hole joint flange.
The present invention adopts technique scheme to obtain following beneficial effect:
1. can complete the experiment of mine fan power frequency+throttling under changeable angle of fan leaves or frequency conversion+throttling operation;
2. can realize the effective simulation along journey flow parameter under the effect of the multiple ventilation blower characterisitic parameter of pipeline;
3. be expected to disclose coupled characteristic between changeable blade angle frequency conversion mine fan and dynamic pipe network drag characteristic.
Accompanying drawing explanation
Fig. 1, experimental system and device schematic diagram thereof.
Fig. 2, blower fan apparatus and plumbing installation schematic diagram.
Fig. 3, the static pressure rings device profile schematic diagram of plumbing installation.
Fig. 4, the porous rectifying device diagrammatic cross-section of plumbing installation.
Fig. 5, sensing becomes send device measuring point and measurement data to arrange schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
For coal mine ventilation and equipment thereof, frequently there is the problem of imbalance of supply and demand, the present invention utilizes fluid mechanics and mine ventilation ultimate principle, by organic assembling and the coupling of five sub-devices, formed experimental technique and the device thereof of mine fan tube coupling network operation characteristic.This device effectively simulated dual, to the lower mine fan performance test of changeable (blade angle and frequency) operation, can effectively be simulated the mine fan performance test of throttling under regulating, and can effectively simulate the pipe network on-way resistance distribution under multiple operating condition.Experimental provision shown in the present, as shown in Figure 1.Fig. 1 is experimental provision and sub-device schematic diagram thereof, and in Fig. 1, I is the sub-device of power, and II is the sub-device of pipeline, and III is electric-controlled system device, and IV is that sensing becomes that to send sub-device, V be automatically to survey quantum devices.
The sub-device of I power described in Fig. 1 and II are the sub-devices of pipeline, and its system layout as shown in Figure 2.At Fig. 2, the 1st, catchment port throttle governor part, the 2nd, catchment port, the 3rd, mine fan, the 4th, transition section, the 5th, porous rectifying device, the 6th, heavy wall stainless steel pipes, the 7th, standardization Flows is measured section, the 8th, static pressure rings device, the 9th, joint flange, the 10th, the flow measurement section of having demarcated, the 11st, go out stream section (doubling as reducing nozzle belt), the 12nd, hollow cone flow regulation section.Air in environment, the throttling through 1 regulates, and the afflux effect through 2, flows into 3,3 pairs of air of flowing through and applies mechanical energy, and air obtains energy, and flow velocity improves, total head can increase, and flows through 4, enters 5.Enter 5 air, its flowing flow field is forced to readjust, and it is more even that flow field becomes, and the unequal situation of velocity distribution is slowed down.Then, air stream, via 6 formation pipelines, flows through 7; 7 measure section by least five segment standard Flows forms, and the structure of every section is identical, and length is 2000mm, connects between the two with 9, and 9 is also the connection measure between other function pipeline sections; In 7, all arranged 8, for measuring flow parameter and the state parameter of air.Flow into 10 air, its volumetric flow rate is determined; 10 adopt two flow field measurement methods, and one, during low discharge, adopt V cone flow meter, its two, during high flow capacity, adopt powerful bar flowmeter, the applicable elements of the two there are differences, and selects the object of two kinds of flowmeters to be to reduce error and to measure as far as possible 3 critical working condition experimenting data.By 10 air of having measured volumetric flow rate, enter 7, and meet the distance that flows after measuring and meet equivalent diameter requirement, to reduce the impact of sweepback step effect, reduce the measuring error of volumetric flow rate.Air through via flow buffering, flow into 11, the 11st, the outlet section of moving air, this section can connect the pipeline of multiple different size, if prover section diameter is 1000mm, can separately make 1000 turns 800,1000 and turns 600,1000 and turn 400 and 1000 and turn 200 circular reducer pipe (with the circle side of changeing change size pipe), and the extension pipeline section of length 800,600,400 and 200 diameters (the rectangular tube length of side) that are 2000mm, so that being that this experimental provision is for the stable power source of other blowing experiments.The sub-device of power and the sub-device of pipeline, provide preposition throttling to regulate, and 1, and rearmounted throttling regulates, 12; These two kinds of control methods complement one another, and also can work in coordination with performance throttling action; Wherein, if accessed reducer pipe in 11 rear ends, can only rely on 1 to carry out throttling adjusting; If carry out pipe network in experiment of the present invention, increase the quantitative determination hindering, can only rely on 12 to carry out throttling adjusting; Other experiments of the present invention, both available 1 had carried out throttling adjusting, and also available 12 carry out throttling adjusting, and even 1 and 12 combine and carry out throttling adjusting.The sub-device of power of the present invention and the sub-device of pipeline, provide for the mine fan of experiment test and the pipeline of Air Flow, two kinds of different throttling regulatory function sections are provided, the physical model condition of Accurate Determining Air Flow along journey flow parameter and air status parameter is provided, provide the instrument of volumetric flow rate the real time measure to prepare, the increasing resistance adjusting measure of simulation mine ventilation windage dynamic change is provided.
In Fig. 2, " 8 " are static pressure rings device.The enlarged detail of static pressure rings device, as shown in Figure 3.Fig. 3, the static pressure rings device profile schematic diagram of the sub-device of pipeline.In Fig. 3, A-A is that A-A section cuts position and sectional view, the 13rd, humiture one sensing transducer, the 14th, absolute pressure sensing transducer, the 15th, the path copper pipe of static pressure rings device, the 16th, the sidewall circular hole of path copper pipe, the 17th, the reinforcing solder joint of static pressure rings device, the 18th, the fixed support of static pressure rings device, the 19th, static pressure rings device add fixing bolt, the 20th, the reinforced liner of static pressure rings device, the 21st, the static pressure out splice going splice of static pressure rings device.13 and 14 are arranged symmetrically with 2 groups is fixed on 18, amounts to two humiture one sensing transducers and two absolute pressure sensing transducers, is respectively used to measure temperature, humidity and the absolute pressure of moving air in pipeline subsystem.The functor of static pressure rings device is 15,16 for being positioned at circular hole on 15 sidewalls, and its aperture is generally 0.1 times of path copper pipe; On 15, on outer side surface, hole, formed a plurality of gaging holes around ring, this gaging hole overdraught is through the flow vector direction of hole face, vertical all the time with air-flow main flow direction, because aperture is small, be generally 1mm left and right, after flowing into, flow velocity is very low, it measures pressure signal is static pressure, on the principle of its measurement and Pitot tube, the assay method of static pressure is similar, therefore, by 15 and 16, forms the device of measuring pressure, being referred to as static pressure measurement device, is that formation is the core devices of " 8 " in Fig. 2 and Fig. 3.In 8, arranged absolute pressure sensing transducer and static pressure measurement device, in the function of the two, there are differences; For static pressure is measured device, it is by static bole, and the numerical value on each measured hole of equalization, by 21 transfer to high precision pressure difference sensing transmitter, realized continuous the real time measure and the signal output of multiple spot static pressure on ring-type section; And absolute pressure sensing transducer, be arranged in pipeline, analysis theoretically, the mensuration numerical value of this sensing transducer, comprises three parts, one, with respect to the outer atmospheric pressure of local pipeline more than former calibration point, its two, the static pressure of moving air in pipeline, its three, the pressure that moving air velocity pressure converts in pipeline; In fact, in above-mentioned three parts, the algebraic value of " two " and " three ", is the total head of Flows air; This total head is added aforesaid " one ", is the atmospheric pressure in pipeline, also can be described as gas absolute pressure.Therefore, outside having determined pipeline, local atmospheric pressure in the situation that, utilize absolute pressure sensing transducer and static pressure to measure device+high precision pressure difference sensing transmitter, the two can bring into play the effect that mutual comparison and correction data are measured.Of the present invention 8, realized on a plurality of measuring section sections of 7 shown in Fig. 2, the mensuration of moving air temperature and humidity, the mensuration of moving air absolute pressure, the mensuration of the relative static pressure of moving air, for measuring pipe network, along journey differential static pressure, experimental technique and device are provided, the dynamic resistance that can effectively measure pipe network distributes, can effectively determine the pressure-difference fluctuation of atmospheric pressure in pipe, especially, atmospheric pressure outside connecting pipe is measured, the atmospheric pressure that can find out the outer fluctuation of pipe in pipe along Cheng Yanchi difference, for there is the distinguished and admirable flow fluctuation propagation law research in roadway of mine ventilation of surface air pressure surge, experimental technique and the device thereof of simulation are provided.
In Fig. 2, " 5 " are porous rectifying device.The enlarged detail of porous rectifying device, as shown in Figure 4.Fig. 4, the porous rectifying device diagrammatic cross-section of the sub-device of pipeline.In Fig. 4, B-B is that B-B section cuts position and sectional view, the 22nd, the outer wall of joint flange, the 23rd, the outer wall of heavy wall stainless steel pipes, the 24th, the bolt hole of joint flange, the 25th, the square hole runner of hole rectification section.As shown in 2, from the moving air of transition section, due to the power that has been subject to 3 high speed rotational blade and bestows, its flow vector, has radial component, axial component and tangential component, and field of flow distributes very inhomogeneous, can not carry out the measurement of flow-data.For this reason, between 4 shown in Fig. 2 and 7, arrange porous rectifying device, length generally should not be less than 1 times of equivalent diameter.In Fig. 4, by 25, form multiple directions runner, there is the air flow of three velocity directions, under the physical constraint of square runner, radial velocity component and tangential speed component are gradually reduced, progressively form the flowing velocity distribution being dominant with axial-velocity vector, this moving air can be similar to finds out one-way fluid flow.By 5 described in this patent, the flow field of moving air is able to homogenising, provide the flow field of measuring with relative static pressure with the absolute pressure of carrying out air status parameter, Air Flow in 7 described in Fig. 3 at Fig. 2 to ensure, reduce the measuring error of experimental technique, for the dynamic on-way resistance of pipe network, measure and provide flow field to ensure.
At " IV " described in Fig. 1, be that sub-device is sent in sensing change, layout points schematic detail view, as shown in Figure 5.Fig. 5, sensing becomes send sub-device measuring point and measurement data to arrange schematic diagram.In Fig. 5, a is humiture one sensing transducer, b is absolute pressure sensing transducer, c is revolution speed sensing transmitter, and d is torque sensing transmitter, and e is high precision pressure difference sensing transmitter, f is volumetric flow rate sensing transducer, g is that hollow cone flow regulation section Long-distance Control regulates, and h is electric parameter sensing transducer group before frequency conversion, and i is electric parameter sensing transducer group after frequency conversion.A and b as shown in Figure 5, in the indoor environment that a group is arranged in outside pipeline, for measuring and export air status parameter and the atmospheric pressure of indoor environment; All the other are arranged in 8 described in Fig. 2 and Fig. 3, on static pressure rings device, for measure with output channel in state parameter and the absolute pressure of moving air.The torsional forces that c and d produce while being respectively used to measure and export the motor speed of mine fan and turn round, measures motor speed to analyzing frequency conversion numerical value and rotating speed, and the quantitative relationship between rotating speed and flow, pressure and power consumption, and the guarantee of surveying instrument is provided; Measure moment of torsion, for analyzing difference between motor power consumption and actual meritorious output, provide data supporting, contribute to quantize the relationship of factors of the two.E shown in Fig. 5, only be arranged on the function pipeline section of 7 described in Fig. 2 and Fig. 3 (standardization Flows is measured section), for measuring and the differential static pressure of the pipeline of output by 8 (static pressure rings device) equalization between inside and outside, for quantizing on-way resistance, provide the support of surveying instrument.F shown in Fig. 5, adopts brute force bar volumetric displacement meter and V cone flow meter through demarcating, when Wind Volume is the interior flow velocity of high pipeline, with powerful bar flowmeter; And low air quantity is when to be low speed flow, use V cone flow meter; These two kinds of flowmeters, what measure and export is volume of air flow.G shown in Fig. 5, has installed stepper motor and the long-range hollow cone flow regulation device that has line traffic control, to facilitate experimental implementation.H shown in Fig. 5 and i, be respectively used to measure and export voltage, electric current, power factor, electric work and the frequency of frequency converter front and back end, for analyzing the Decay Law between frequency conversion frequency numerical value and electrical quantity, especially to carrying out the quantitative research between frequency conversion frequency numerical value and the decay of frequency converter efficiency, provide the support of experimental data.Utilize above-mentioned seven class sensing transducers, it is humiture one sensing transducer, absolute pressure sensing transducer, revolution speed sensing transmitter, torque sensing transmitter, high precision pressure difference sensing transmitter, volumetric flow rate sensing transducer and electric parameter sensing transducer, can realize the real time measure output experiment atmospheric environment, air flow parameters in pipeline, air status parameter in pipeline, can realize the real time measure and export tested mine fan output static pressure, output total head, the rotating speed of volumetric flow rate and institute's gas-distributing motor, moment of torsion, can the real time measure and the electric parameter of exporting frequency converter frequency conversion front and back.The mensuration of described these data and output, the experiment for the mining main ventilation runnability of changeable frequency and having multiple changing angle, provides data supporting; Experiment for dynamic pipe network drag characteristic, provides data supporting; Utilize the experimental data of mine fan and pipe network on-way resistance, can effectively analyze the two coupling operation characteristic.
Sum up above-mentioned concrete methods of realizing, experimental technique of the present invention is compared with existing experiment, utilize the adjustability of the angle of fan leaves of the described sub-device of power, utilize the homogenization of described pipeline subsystem to Air Flow flow field, utilize electric-controlled system device to realize the conversion of the power frequency operation of tested mine fan and converting operation and adjusting, utilize described sensing change to send sub-device in real time and METHOD FOR CONTINUOUS DETERMINATION and output operational factor numerical value, utilize the automatic quantum devices of surveying to realize real-time continuous acceptance and storage running parameter values; Thus, realized realization tracking and the record to the operational factor of moving air in tested mine fan and pipeline and state.Experimental technique of the present invention and device, can complete the experiment of mine fan power frequency+throttling under changeable angle of fan leaves or frequency conversion+throttling operation, can realize the effective simulation distributing along journey differential static pressure under the multiple drag characteristic of pipeline, be expected to disclose coupled characteristic between changeable blade angle frequency conversion mine fan and dynamic pipe network drag characteristic, begin to take shape the variable-frequency ventilation new theory of mining main ventilation Coupled Dynamic mine ventilation system.
Claims (10)
1. the experimental technique of mine fan tube coupling network operation characteristic, is characterized in that: step 1, by the method for application variable frequency adjustment, is obtained the converting operation characteristic of changeable frequency mine fan; The method that step 2 regulates by application throttling, obtains the operation characteristic of power frequency and throttling mine fan or the operation characteristic of frequency conversion and throttling mine fan; Step 3 regulates fan blade angle by application, in conjunction with the regulating measure of power frequency and throttling or frequency conversion and throttling, obtains the be coupled operation characteristic of mine fan of changeable frequency of changeable blade angle; Step 4 adopts the method for arranging static pressure rings device along journey, implement water saving measures, obtain pipeline along journey flow parameter, catch the mine fan characterisitic parameter of changeable blade angle, changeable frequency at the numerical value presentation attributes along on Cheng Guandao, step 5, in conjunction with the mine fan operation characteristic of changeable blade angle, changeable frequency, realizes mine fan operation curve family and the dynamically simulation of the coupled characteristic between ventilating duct resistance.
2. the device of the experimental technique of mine fan tube coupling network operation characteristic, it is characterized in that: comprise propulsion system (I), plumbing installation (II), electrical control gear (III), sensing becomes send device (IV), self-operated measuring unit (V).
3. the device of the experimental technique of mine fan tube coupling network operation characteristic according to claim 2, it is characterized in that: described propulsion system (I), comprise that catchment port (2), catchment port (2) opening part installed catchment port throttle governor part (1), catchment port throttle governor part (1), by conulite, be that main body forms, can freely advance and retreat in catchment port (2), catchment port (2) is taper, and mine fan (3) has been installed in rear end.
4. the device of the experimental technique of mine fan tube coupling network operation characteristic according to claim 2, it is characterized in that: propulsion system (I) are connected with plumbing installation (II) by transition section (4), plumbing installation (II) comprises porous rectifying device (5), heavy wall stainless steel pipes (6), standardization Flows is measured section (7), static pressure rings device (8), joint flange (9), the flow measurement section (10) of having demarcated, go out stream section (11), hollow cone flow regulation section (12), porous rectifying device (5) connects transition section (4) and heavy wall stainless steel pipes (6), standardization Flows is measured section (7) and is consisted of at least five segment standard Flows mensuration sections, the structure of every section is identical, length is 2000mm, use joint flange (9) to connect between the two, joint flange (9) is also the connection measure between other function pipeline sections, at standardization Flows, measure in section (7) and all arranged static pressure rings device (8), the flow measurement section (10) of having demarcated is arranged on after static pressure rings device (8), by going out stream section (11), is connected with hollow cone flow regulation section (12).
5. the device of the experimental technique of mine fan tube coupling network operation characteristic according to claim 3, is characterized in that: described mine fan (3) is for singly revolving mine fan or counter-rotating fan.
6. the device of the experimental technique of mine fan tube coupling network operation characteristic according to claim 2, it is characterized in that: described sensing becomes send sub-device (IV) by humiture one sensing transducer (a), absolute pressure sensing transducer (b), revolution speed sensing transmitter (c), torque sensing transmitter (d), high precision pressure difference sensing transmitter (e), volumetric flow rate sensing transducer (f), hollow cone flow regulation section Long-distance Control regulates (g), electric parameter sensing transducer group (h) before frequency conversion, electric parameter sensing transducer group (I) after frequency conversion, humiture one sensing transducer (a) and absolute pressure sensing transducer (b), in the indoor environment that a group is arranged in outside pipeline, all the other are arranged on static pressure rings device (8), revolution speed sensing transmitter (c) is arranged on mine fan (3) with torque sensing transmitter (d), precision pressure difference sensing transmitter (e) is arranged in standardization Flows mensuration section (7), volumetric flow rate sensing transducer (f) is arranged in flow measurement section (10), hollow cone flow regulation section Long-distance Control regulates (g) that stepper motor and the long-range hollow cone flow regulation device that has line traffic control have been installed, be arranged in hollow cone flow regulation section (12).
7. the device of the experimental technique of ore deposit according to claim 2 mine fan tube coupling network operation characteristic, is characterized in that: described electric-controlled system device (III) can carry out the switching of power frequency and frequency conversion.
8. the device of the experimental technique of mine fan tube coupling network operation characteristic according to claim 2, is characterized in that: described automatic survey quantum devices (V), consists of data conversion module, industrial computer and testing software.
9. the device of the experimental technique of mine fan tube coupling network operation characteristic according to claim 4, it is characterized in that: described static pressure rings device (8), by humiture one sensing transducer (13), absolute pressure sensing transducer (14), path copper pipe (15), sidewall circular hole (16), reinforce solder joint (17), fixed support (18), adds fixing bolt (19), reinforced liner (20), static pressure out splice going splice (21) forms.Humiture one sensing transducer (13) and absolute pressure sensing transducer (14) are arranged symmetrically with 2 groups and are fixed on fixed support (18), sidewall circular hole (16) is for being positioned at circular hole on path copper pipe (15) sidewall, and its aperture is generally 0.1 times of path copper pipe; On the upper outer side surface of path copper pipe (15), hole, formed the gaging hole around ring, this gaging hole overdraught is through the flow vector direction of hole face, vertical all the time with air-flow main flow direction.
10. the device of the experimental technique of mine fan tube coupling network operation characteristic according to claim 4, it is characterized in that: described porous rectifying device (5), the outer wall of joint flange (22), the outer wall of heavy wall stainless steel pipes (23), the bolt hole of joint flange (24), the square hole runner (25) of hole rectification section forms, outer wall (22) joint flange (9), outer wall (23) is the outer wall of heavy wall stainless steel pipes, bolt hole (24) joint flange (9).
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| CN201310676289.4A CN103674469B (en) | 2013-12-13 | 2013-12-13 | The experimental technique of mine fan coupling pipe network operation characteristic and device thereof |
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