CN113884167B - Working capacity metering method and system for mobile crusher - Google Patents
Working capacity metering method and system for mobile crusher Download PDFInfo
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- CN113884167B CN113884167B CN202111079144.7A CN202111079144A CN113884167B CN 113884167 B CN113884167 B CN 113884167B CN 202111079144 A CN202111079144 A CN 202111079144A CN 113884167 B CN113884167 B CN 113884167B
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000013016 damping Methods 0.000 claims description 29
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- 238000004891 communication Methods 0.000 abstract description 4
- 239000000047 product Substances 0.000 description 25
- 238000005259 measurement Methods 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
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- 238000005516 engineering process Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
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- 239000000428 dust Substances 0.000 description 1
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- 239000012535 impurity Substances 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G11/00—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers
- G01G11/04—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers having electrical weight-sensitive devices
- G01G11/043—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers having electrical weight-sensitive devices combined with totalising or integrating devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
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Abstract
The invention discloses a method and a system for measuring the working capacity of a mobile crusher, which are implemented by acquiring the power of a belt conveyor; measuring motor idle current, belt inclination angle, motor current in idle state of finished belt and working current of finished belt motor of the crusher; according to the acquired power of the belt conveyor, and the measured motor idling current, the belt inclination angle, the finished belt idling state motor current and the finished belt motor working current, the required power during belt idling, the consumed power during belt loading, the belt conveying vertical height, the belt conveying horizontal distance, the motor resistance coefficient, the belt conveying amount, the real-time capacity of the crusher and the total yield of the crusher in a fixed time are calculated. The measuring means of the invention is simple and reliable, is not limited by the posture of the crusher, the inclination angle of the belt and the like, and is suitable for various working condition sites; the integrated level is high, and the communication protocol with the control system is only required to be set, so that the integrated level can be used as a universal element.
Description
Technical Field
The invention relates to the field of engineering mechanical equipment control, and particularly discloses a working capacity metering method and system of a movable crusher.
Background
Since current environmental protection policies limit river sand excavation, a way of crushing stones into sand is increasingly widely adopted, and market development of mobile crushers is also faster. However, the working yield calculation (sand tonnage) technology of the crusher itself is still blank.
The general workflow of mobile crushing is: the stone is sent to a feeding belt through a digging machine, is sent to a crushing main machine and is crushed into semi-finished products, the iron remover removes iron and impurities through a blower, the filtering screen filters the semi-finished products, the finished products sand is discharged through a finished product belt, and the unqualified sand is returned to the main machine through a returning belt for crushing again.
Since the product is mobile, the crusher portion conveyor belt mechanism is either collapsible or easily removable, which is a consideration of throughput and balance. Thus, conventional weight metering methods (e.g., load cell/belt scale) cannot be used on products due to installation problems. The novel technology (such as radar, image recognition and other auxiliary measures) cannot be normally used in working environments with serious dust of the crusher. Therefore, the current crusher work yield calculation cannot be solved by itself, but only metering feedback after transporting the finished product by a downstream truck. Thus, the device owners cannot actively master the product yield and capacity, which is not active or real-time.
Therefore, the above-mentioned defects existing in the existing mobile crusher during self-weighing are a technical problem to be solved urgently.
Disclosure of Invention
The invention provides a working capacity metering method and system of a mobile crusher, and aims to solve the technical problems of the defects existing in the existing mobile crusher during self weighing.
One aspect of the invention relates to a method for measuring the working capacity of a mobile crusher, comprising the following steps:
acquiring power of a belt conveyor, wherein the power of the belt conveyor comprises power P required by idling of a belt 1 Power P required by horizontal load transmission of belt 2 And the power P required by the belt to lift the load height 3 ；
Measuring motor idle current I of finished motor of crusher 1 Motor current I in idle state of finished belt, belt inclination angle theta and belt 2 And the working current I of the finished belt motor 3 ；
Based on the obtained power of the belt conveyor and the measured motor idle current I of the finished motor of the crusher 1 Inclination angle theta of belt and finished productBelt idle state motor current I 2 And the working current I of the finished belt motor 3 Calculating the power P required by the belt during idle running 1 Power P consumed when the belt is loaded 2 +P 3 The vertical height H of belt conveying, the horizontal distance L of belt conveying and the resistance coefficient K of a motor;
based on calculated power P required during belt idle 1 Power P consumed when the belt is loaded 2 +P 3 The vertical height H, the horizontal distance L and the resistance coefficient K of the motor are calculated to obtain the belt conveying quantity Qt 1 Real-time capacity Qt of crusher 2 And the total yield m of the crusher in a fixed time.
Further, the power P required for idling the belt 1 The method comprises the following steps:
P 1 ＝(C×f×L×3.6Gm×V)/367
wherein P is 1 The belt speed is equal to the speed of a belt conveyor, and is equal to the speed of a steering roller;
the belt horizontally transmits the power P required by the load 2 The method comprises the following steps:
P 2 ＝(C×f×L×Qt 1 )/367
wherein P is 2 The power required by the horizontal conveying load of the belt is C is the damping coefficient of the conveying belt and the bearing, f is the damping coefficient of the carrier roller, L is the effective horizontal conveying distance of the belt conveyor, and Qt 1 The belt conveying amount;
power P required by belt to raise load height 3 The method comprises the following steps:
P 3 ＝Qt 1 ×H/367
wherein P is 3 The power, qt, required to raise the load height for the belt 1 The belt conveying amount is H, and the belt conveying vertical height is H.
Further, the power P required for idling the belt 1 Calculated by the following formula:
wherein P is 1 Is the power required by the idle running of the belt, U is the power supply voltage, cos phi is the power factor of the motor, I 1 Motor idle current for crusher product motor, I 2 Motor current in idle state of finished belt;
power P consumed when the belt is loaded 2 +P 3 Calculated by the following formula:
wherein P is 2 Power required for horizontal load transfer of belt, P 3 The power required by the load height is lifted for the belt, U is the power supply voltage, cos phi is the power factor of the motor, I 2 Motor current for idle state of finished belt, I 3 Working current of the finished belt motor;
the belt transport vertical height H is calculated by the following formula:
H＝L 0 ×sinθ
wherein H is the vertical height of belt conveying, L 0 The length of the belt is the length of the belt, and theta is the inclination angle of the belt;
the belt conveying horizontal distance L is calculated by the following formula:
L＝L 0 ×cosθ
wherein L is the horizontal distance of belt conveying, L 0 The belt length is the belt length, and θ is the belt inclination angle.
The motor resistance coefficient K is calculated by the following formula:
K＝C×f＝P 1 ×367/L×3.6Gm×V
wherein K is the resistance coefficient of the motor, C is the damping coefficient of the conveyer belt and the bearing, f is the damping coefficient of the carrier roller, and P 1 The power required by the idling of the belt is L, the horizontal distance of belt conveying is L, gm is the mass of a conveying belt, a carrier roller and a steering roller, and V is the belt speed.
Further, the belt conveying amount Qt 1 Calculated by the following formula:
Qt 1 ＝(P 2 +P 3 )×367/(K×L+H)
wherein Qt 1 For the belt conveying amount, P 2 Power required for horizontal load transfer of belt, P 3 The power required by lifting the load height of the belt is K is the resistance coefficient of the motor, L is the horizontal distance of belt conveying, and H is the vertical height of belt conveying.
Further, real-time capacity Qt of the crusher 2 Calculated by the following formula:
Qt 2 ＝635×U×cosφ×(I 3 -I 2 )/[635×U×cosφ×(I 2 -I 1 )/3.6Gm×V+L 0 ×sinθ]
wherein Qt 2 For real-time capacity of the crusher, cos phi is the power factor of the motor, I 1 Motor idle current for crusher product motor, I 2 Motor current for idle state of finished belt, I 3 The working current of the finished belt motor is Gm is the mass of a conveying belt, a carrier roller and a steering roller, V is the belt speed, L 0 The length of the belt is the length of the belt, and theta is the inclination angle of the belt;
the total yield m of the crusher in a fixed time is calculated by the following formula:
wherein m is the total yield of the crusher in a fixed time, qt 2 The real-time capacity of the crusher is realized.
Another aspect of the invention relates to a mobile crusher operating capacity metering system comprising:
the acquisition module is used for acquiring the power of the belt conveyor, wherein the power of the belt conveyor comprises the power P required by the idle belt 1 Power P required by horizontal load transmission of belt 2 And the power P required by the belt to lift the load height 3 ；
The measuring module is used for measuring motor idle current I of a finished motor of the crusher 1 Inclination angle of beltDegree θ, finished belt idle state motor current I 2 And the working current I of the finished belt motor 3 ；
A first calculation module for measuring the motor idle current I of the finished motor of the crusher according to the acquired power of the belt conveyor 1 Motor current I in idle state of finished belt, belt inclination angle theta and belt 2 And the working current I of the finished belt motor 3 Calculating the power P required by the belt during idle running 1 Power P consumed when the belt is loaded 2 +P 3 The vertical height H of belt conveying, the horizontal distance L of belt conveying and the resistance coefficient K of a motor;
a second calculation module for calculating the required power P during idle running of the belt according to the calculated power P 1 Power P consumed when the belt is loaded 2 +P 3 The vertical height H, the horizontal distance L and the resistance coefficient K of the motor are calculated to obtain the belt conveying quantity Qt 1 Real-time capacity Qt of crusher 2 And the total yield m of the crusher in a fixed time.
Further, the power P required for idling the belt 1 The method comprises the following steps:
P 1 ＝(C×f×L×3.6Gm×V)/367
wherein P is 1 The belt speed is equal to the speed of a belt conveyor, and is equal to the speed of a steering roller;
the belt horizontally transmits the power P required by the load 2 The method comprises the following steps:
P 2 ＝(C×f×L×Qt 1 )/367
wherein P is 2 The power required by the horizontal conveying load of the belt is C is the damping coefficient of the conveying belt and the bearing, f is the damping coefficient of the carrier roller, L is the effective horizontal conveying distance of the belt conveyor, and Qt 1 The belt conveying amount;
power P required by belt to raise load height 3 The method comprises the following steps:
P 3 ＝Qt 1 ×H/367
wherein P is 3 The power, qt, required to raise the load height for the belt 1 The belt conveying amount is H, and the belt conveying vertical height is H.
Further, the power P required for idling the belt 1 Calculated by the following formula:
wherein P is 1 Is the power required by the idle running of the belt, U is the power supply voltage, cos phi is the power factor of the motor, I 1 Motor idle current for crusher product motor, I 2 Motor current in idle state of finished belt;
power P consumed when the belt is loaded 2 +P 3 Calculated by the following formula:
wherein P is 2 Power required for horizontal load transfer of belt, P 3 The power required by the load height is lifted for the belt, U is the power supply voltage, cos phi is the power factor of the motor, I 2 Motor current for idle state of finished belt, I 3 Working current of the finished belt motor;
the belt transport vertical height H is calculated by the following formula:
H＝L 0 ×sinθ
wherein H is the vertical height of belt conveying, L 0 The length of the belt is the length of the belt, and theta is the inclination angle of the belt;
the belt conveying horizontal distance L is calculated by the following formula:
L＝L 0 ×cosθ
wherein L is the horizontal distance of belt conveying, L 0 The belt length is the belt length, and θ is the belt inclination angle.
The motor resistance coefficient K is calculated by the following formula:
K＝C×f＝P 1 ×367/L×3.6Gm×V
wherein K is the resistance coefficient of the motor, C is the damping coefficient of the conveyer belt and the bearing, f is the damping coefficient of the carrier roller, and P 1 The power required by the idling of the belt is L, the horizontal distance of belt conveying is L, gm is the mass of a conveying belt, a carrier roller and a steering roller, and V is the belt speed.
Further, the belt conveying amount Qt 1 Calculated by the following formula:
Qt 1 ＝(P 2 +P 3 )×367/(K×L+H)
wherein Qt 1 For the belt conveying amount, P 2 Power required for horizontal load transfer of belt, P 3 The power required by lifting the load height of the belt is K is the resistance coefficient of the motor, L is the horizontal distance of belt conveying, and H is the vertical height of belt conveying.
Further, real-time capacity Qt of the crusher 2 Calculated by the following formula:
Qt 2 ＝635×U×cosφ×(I 3 -I 2 )/[635×U×cosφ×(I 2 -I 1 )/3.6Gm×V+L 0 ×sinθ]
wherein Qt 2 For real-time capacity of the crusher, cos phi is the power factor of the motor, I 1 Motor idle current for crusher product motor, I 2 Motor current for idle state of finished belt, I 3 The working current of the finished belt motor is Gm is the mass of a conveying belt, a carrier roller and a steering roller, V is the belt speed, L 0 The length of the belt is the length of the belt, and theta is the inclination angle of the belt;
the total yield m of the crusher in a fixed time is calculated by the following formula:
wherein m is the total yield of the crusher in a fixed time, qt 2 The real-time capacity of the crusher is realized.
The beneficial effects obtained by the invention are as follows:
the invention provides a method and a system for measuring the working capacity of a mobile crusher, which are implemented by acquiringPower of belt conveyor including power P required at idle belt 1 Power P required by horizontal load transmission of belt 2 And the power P required by the belt to lift the load height 3 The method comprises the steps of carrying out a first treatment on the surface of the Measuring motor idle current I of finished motor of crusher 1 Motor current I in idle state of finished belt, belt inclination angle theta and belt 2 And the working current I of the finished belt motor 3 The method comprises the steps of carrying out a first treatment on the surface of the Based on the obtained power of the belt conveyor and the measured motor idle current I of the finished motor of the crusher 1 Motor current I in idle state of finished belt, belt inclination angle theta and belt 2 And the working current I of the finished belt motor 3 Calculating the power P required by the belt during idle running 1 Power P consumed when the belt is loaded 2 +P 3 Vertical height H, horizontal distance L, resistance coefficient K of motor and amount Qt 1 Real-time capacity Qt of crusher 2 And the total yield m of the crusher in a fixed time. According to the working capacity metering method and system for the mobile crusher, the effective output power of the belt motor of the crusher is calculated by measuring the no-load and load current of the motor, parameters such as the inclination angle of the belt, the length of the belt and the dead weight of the belt are used for calculating the weight of sand transported by the belt, and the quality of sand transported by the belt of a finished product of the crusher can be indirectly measured without adopting schemes which are difficult to realize such as direct weighing; the measuring means is simple and reliable, is not limited by the posture of the crusher, the inclination angle of the belt and the like, and is suitable for various working condition sites; the integrated level is high, and the communication protocol with the control system is only required to be set, so that the integrated level can be used as a universal element.
Drawings
FIG. 1 is a schematic flow chart of an embodiment of a method for measuring working capacity of a mobile crusher according to the present invention;
FIG. 2 is a functional block diagram of an embodiment of a mobile crusher operating capacity metering system provided by the present invention.
Reference numerals illustrate:
10. an acquisition module; 20. a measurement module; 30. a first computing module; 40. and a second calculation module.
Detailed Description
In order to better understand the above technical solutions, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, a first embodiment of the present invention provides a method for measuring working capacity of a mobile crusher, comprising the steps of:
step S100, obtaining the power of the belt conveyor, wherein the power of the belt conveyor comprises the power P required by the idle belt 1 Power P required by horizontal load transmission of belt 2 And the power P required by the belt to lift the load height 3 。
The power of the belt conveyor consists of three parts, namely the power P required during the idle running of the belt 1 The belt horizontally transmits the power P required by the load 2 And the power P required by the belt to lift the load height 3 。
The calculation formula of the total power of the belt conveyor is as follows:
P 0 ＝[C×f×L×(3.6Gm×V+Qt)+Qt×H]/367 (1)
in the formula (1), P 0 The total power of the belt conveyor is C, the damping coefficient of the conveyor belt and the bearing (the inherent constant of the belt), f, the damping coefficient of the carrier roller (the inherent constant of the belt), L, the effective horizontal distance of the conveyor belt conveyor (the inherent constant of the belt), GM, the mass of the conveyor belt, the carrier roller and the steering roller (the inherent constant of the belt), V, the belt speed (because the motor is fixed in frequency and can be roughly considered as constant under the condition of not seriously overloaded), qt, the belt conveying amount (per ton/hour), and H, the vertical height of the belt conveying.
The power splitting is divided into the three parts, namely:
1. power P required during belt idle 1 The method comprises the following steps:
P 1 ＝(C×f×L×3.6Gm×V)/367 (2)
in the formula (2), P 1 The power required by the idle running of the belt is C is the damping coefficient of the conveying belt and the bearing, f is the damping coefficient of the carrier roller, L is the effective horizontal distance of the conveying belt conveyor, gm is the mass of the conveying belt, the carrier roller and the steering roller, and V is the belt speed.
2. The belt horizontally transmits the power P required by the load 2 The method comprises the following steps:
P 2 ＝(C×f×L×Qt 1 )/367 (3)
in the formula (3), P 2 The power required by the horizontal conveying load of the belt is C is the damping coefficient of the conveying belt and the bearing, f is the damping coefficient of the carrier roller, L is the effective horizontal conveying distance of the belt conveyor, and Qt 1 Is the belt conveying amount.
3. Power P required by belt to raise load height 3 The method comprises the following steps:
P 3 ＝Qt 1 ×H/367 (4)
in the formula (4), P 3 The power, qt, required to raise the load height for the belt 1 The belt conveying amount is H, and the belt conveying vertical height is H.
Step S200, measuring the motor idling current I of the finished motor of the crusher 1 Motor current I in idle state of finished belt, belt inclination angle theta and belt 2 And the working current I of the finished belt motor 3 。
When the belt motor of the crusher is not connected with the belt, the idle current of the motor is measured to be I through a current transducer 1 (fixed value, only one measurement per device is required). When the crusher product belt is in idle running after being unfolded, the inclination angle of the belt is measured to be theta by an inclination angle sensor, and the current when the product belt is unfolded in place but the loaded sand is not transmitted is measured by a current transmitter, namely the motor current in the idle running state of the product belt is I 2 . When the crusher starts to work, the working current of the carried finished belt motor is measured to be I in real time through the current transducer 3 。
Step S300, according to the acquired power of the belt conveyor and the measured motor idling current I of the finished motor of the crusher 1 Motor current I in idle state of finished belt, belt inclination angle theta and belt 2 And the working current I of the finished belt motor 3 Calculating the power P required by the belt during idle running 1 Power P consumed when the belt is loaded 2 +P 3 A vertical belt conveying height H, a horizontal belt conveying distance L andand a motor resistance coefficient K.
According to a motor power calculation formula, the no-load consumption power of the motor can be calculated:
in the formula (5), U is the power supply voltage, cos phi is the power factor of the motor, and is a known term; i 1 Motor idle current for the finished motor of the crusher.
Power P required during belt idle 1 Calculated by the following formula:
in the formula (6), P 1 Is the power required by the idle running of the belt, U is the power supply voltage, cos phi is the power factor of the motor, I 1 Motor idle current for crusher product motor, I 2 Motor current is in idle state for the finished belt.
Power P consumed when the belt is loaded 2 +P 3 Calculated by the following formula:
in the formula (7), P 2 Power required for horizontal load transfer of belt, P 3 The power required by the load height is lifted for the belt, U is the power supply voltage, cos phi is the power factor of the motor, I 2 Motor current for idle state of finished belt, I 3 The working current of the finished belt motor is obtained.
The belt transport vertical height H is calculated by the following formula:
H＝L 0 ×sinθ (8)
in the formula (8), H is the vertical height of belt conveying, L 0 The belt length is the belt length, and θ is the belt inclination angle.
The belt conveying horizontal distance L is calculated by the following formula:
L＝L 0 ×cosθ (9)
in the formula (9), L is the horizontal distance of belt conveying and L 0 The belt length is the belt length, and θ is the belt inclination angle.
Power P required during belt idle 1 Calculated by the following formula:
formula (10), P 1 Is the power required by the idle running of the belt, U is the power supply voltage, cos phi is the power factor of the motor, I 1 Motor idle current for crusher product motor, I 2 Motor current is in idle state for the finished belt.
Power P consumed when the belt is loaded 2 +P 3 Calculated by the following formula:
in the formula (11), P 2 Power required for horizontal load transfer of belt, P 3 The power required by the load height is lifted for the belt, U is the power supply voltage, cos phi is the power factor of the motor, I 2 Motor current for idle state of finished belt, I 3 The working current of the finished belt motor is obtained.
The belt transport vertical height H is calculated by the following formula:
H＝L 0 ×sinθ (12)
in the formula (12), H is the vertical height of belt conveying, L 0 The belt length is the belt length, and θ is the belt inclination angle.
The belt conveying horizontal distance L is calculated by the following formula:
L＝L 0 ×cosθ (13)
in the formula (13), L is the horizontal distance of belt conveying and L 0 The belt length is the belt length, and θ is the belt inclination angle.
Step S400. Based on calculated power P required during belt idle 1 Power P consumed when the belt is loaded 2 +P 3 The vertical height H, the horizontal distance L and the resistance coefficient K of the motor are calculated to obtain the belt conveying quantity Qt 1 Real-time capacity Qt of crusher 2 And the total yield m of the crusher in a fixed time.
Belt conveying quantity Qt 1 Calculated by the following formula:
Qt 1 ＝(P 2 +P 3 )×367/(K×L+H) (14)
in equation (14), qt 1 For the belt conveying amount, P 2 Power required for horizontal load transfer of belt, P 3 The power required by lifting the load height of the belt is K is the resistance coefficient of the motor, L is the horizontal distance of belt conveying, and H is the vertical height of belt conveying.
Further, real-time capacity Qt of the crusher 2 Calculated by the following formula:
Qt 2 ＝635×U×cosφ×(I 3 -I 2 )/[635×U×cosφ×(I 2 -I 1 )/3.6Gm×V+L 0 ×sinθ]
(15)
in equation (15), qt 2 The real-time capacity of the crusher is expressed as ton/hour; cos phi is the power factor of the motor, I 1 Motor idle current for crusher product motor, I 2 Motor current for idle state of finished belt, I 3 The working current of the finished belt motor is Gm is the mass of a conveying belt, a carrier roller and a steering roller, V is the belt speed, L 0 The belt length is the belt length, and θ is the belt inclination angle.
The crusher being set in a fixed time (t 1 To t 2 ) The total yield m of (2) is calculated by the following formula:
in formula (16), m is the total yield of the crusher in a fixed time, expressed asTon of water; qt 2 The real-time capacity of the crusher is realized.
The present embodiment provides a method for measuring working capacity of a mobile crusher, which includes power P required for idling of a belt by acquiring power of the belt conveyor, as compared with the prior art 1 Power P required by horizontal load transmission of belt 2 And the power P required by the belt to lift the load height 3 The method comprises the steps of carrying out a first treatment on the surface of the Measuring motor idle current I of finished motor of crusher 1 Motor current I in idle state of finished belt, belt inclination angle theta and belt 2 And the working current I of the finished belt motor 3 The method comprises the steps of carrying out a first treatment on the surface of the Based on the obtained power of the belt conveyor and the measured motor idle current I of the finished motor of the crusher 1 Motor current I in idle state of finished belt, belt inclination angle theta and belt 2 And the working current I of the finished belt motor 3 Calculating the power P required by the belt during idle running 1 Power P consumed when the belt is loaded 2 +P 3 Vertical height H, horizontal distance L, resistance coefficient K of motor and amount Qt 1 Real-time capacity Qt of crusher 2 And the total yield m of the crusher in a fixed time. According to the working capacity metering method of the movable crusher, the effective output power of the belt motor of the crusher is calculated by measuring the no-load current and the load current of the motor, parameters such as the inclination angle of the belt, the length of the belt and the dead weight of the belt are used for calculating the weight of sand transported by the belt in an inverted mode, and the quality of sand transported by the belt of a finished product of the crusher can be indirectly measured without adopting schemes which are difficult to realize such as direct weighing; the measuring means is simple and reliable, is not limited by the posture of the crusher, the inclination angle of the belt and the like, and is suitable for various working condition sites; the integrated level is high, and the communication protocol with the control system is only required to be set, so that the integrated level can be used as a universal element.
Preferably, please refer to fig. 2, fig. 2 is a functional block diagram of an embodiment of a mobile crusher working capacity metering system provided by the present invention, in this embodiment, the mobile crusher working capacity metering system includes an acquisition module 10, a measurement module 20, a first calculation module 30 and a second calculation module 40, wherein the acquisition module 10 for obtaining the power of the belt conveyor, the power of the belt conveyor comprising the power P required when the belt idles 1 Power P required by horizontal load transmission of belt 2 And the power P required by the belt to lift the load height 3 The method comprises the steps of carrying out a first treatment on the surface of the A measuring module 20 for measuring the motor idle current I of the finished motor of the crusher 1 Motor current I in idle state of finished belt, belt inclination angle theta and belt 2 And the working current I of the finished belt motor 3 . A first calculation module 30 for measuring the motor idle current I of the finished motor of the crusher according to the acquired power of the belt conveyor 1 Motor current I in idle state of finished belt, belt inclination angle theta and belt 2 And the working current I of the finished belt motor 3 Calculating the power P required by the belt during idle running 1 Power P consumed when the belt is loaded 2 +P 3 The vertical height H of belt conveying, the horizontal distance L of belt conveying and the resistance coefficient K of the motor. A second calculation module 40 for calculating the power P required for the belt idling according to the calculated power P 1 Power P consumed when the belt is loaded 2 +P 3 The vertical height H, the horizontal distance L and the resistance coefficient K of the motor are calculated to obtain the belt conveying quantity Qt 1 Real-time capacity Qt of crusher 2 And the total yield m of the crusher in a fixed time.
The power of the belt conveyor consists of three parts, namely the power P required during the idle running of the belt 1 The belt horizontally transmits the power P required by the load 2 And the power P required by the belt to lift the load height 3 。
The calculation formula of the total power of the belt conveyor is as follows:
P 0 ＝[C×f×L×(3.6Gm×V+Qt)+Qt×H]/367 (17)
in the formula (17), P 0 For the total power of the belt conveyor, C is the damping coefficient of a conveyor belt and a bearing (the damping coefficient is the inherent constant of the belt), f is the damping coefficient of a carrier roller (the inherent constant of the belt), L is the effective horizontal distance of the belt conveyor conveying (the inherent constant of the belt), gm is the mass of the conveyor belt, the carrier roller and a steering roller (the inherent constant of the belt), and V is the belt speed (because the motor is fixed in frequency, under the condition of not seriously overload, the belt is also fixed in the belt speed)Roughly considered as a constant), qt is the belt conveying amount (unit ton/hr), and H is the belt conveying vertical height.
The power splitting is divided into the three parts, namely:
1. power P required during belt idle 1 The method comprises the following steps:
P 1 ＝(C×f×L×3.6Gm×V)/367 (18)
in the formula (18), P 1 The power required by the idle running of the belt is C is the damping coefficient of the conveying belt and the bearing, f is the damping coefficient of the carrier roller, L is the effective horizontal distance of the conveying belt conveyor, gm is the mass of the conveying belt, the carrier roller and the steering roller, and V is the belt speed.
2. The belt horizontally transmits the power P required by the load 2 The method comprises the following steps:
P 2 ＝(C×f×L×Qt 1 )/367 (19)
in the formula (19), P 2 The power required by the horizontal conveying load of the belt is C is the damping coefficient of the conveying belt and the bearing, f is the damping coefficient of the carrier roller, L is the effective horizontal conveying distance of the belt conveyor, and Qt 1 Is the belt conveying amount.
3. Power P required by belt to raise load height 3 The method comprises the following steps:
P 3 ＝Qt 1 ×H/367 (20)
in the formula (20), P 3 The power, qt, required to raise the load height for the belt 1 The belt conveying amount is H, and the belt conveying vertical height is H.
When the belt motor of the crusher is not connected with the belt, the idle current of the motor is measured to be I through a current transducer 1 (fixed value, only one measurement per device is required). When the crusher product belt is in idle running after being unfolded, the inclination angle of the belt is measured to be theta by an inclination angle sensor, and the current when the product belt is unfolded in place but the loaded sand is not transmitted is measured by a current transmitter, namely the motor current in the idle running state of the product belt is I 2 . When the crusher starts to work, the working current of the carried finished belt motor is measured to be I in real time through the current transducer 3 。
According to a motor power calculation formula, the no-load consumption power of the motor can be calculated:
in the formula (21), U is the power supply voltage, cos phi is the power factor of the motor, which are known terms; i 1 Motor idle current for the finished motor of the crusher.
Power P required during belt idle 1 Calculated by the following formula:
in the formula (22), P 1 Is the power required by the idle running of the belt, U is the power supply voltage, cos phi is the power factor of the motor, I 1 Motor idle current for crusher product motor, I 2 Motor current is in idle state for the finished belt.
Power P consumed when the belt is loaded 2 +P 3 Calculated by the following formula:
in the formula (23), P 2 Power required for horizontal load transfer of belt, P 3 The power required by the load height is lifted for the belt, U is the power supply voltage, cos phi is the power factor of the motor, I 2 Motor current for idle state of finished belt, I 3 The working current of the finished belt motor is obtained.
The belt transport vertical height H is calculated by the following formula:
H＝L 0 ×sinθ (24)
in the formula (24), H is the vertical height of belt conveying, L 0 The belt length is the belt length, and θ is the belt inclination angle.
The belt conveying horizontal distance L is calculated by the following formula:
L＝L 0 ×cosθ (25)
in the formula (25), L is the horizontal distance of belt conveying and L 0 The belt length is the belt length, and θ is the belt inclination angle.
Power P required during belt idle 1 Calculated by the following formula:
equation (26), P 1 Is the power required by the idle running of the belt, U is the power supply voltage, cos phi is the power factor of the motor, I 1 Motor idle current for crusher product motor, I 2 Motor current is in idle state for the finished belt.
Power P consumed when the belt is loaded 2 +P 3 Calculated by the following formula:
in the formula (27), P 2 Power required for horizontal load transfer of belt, P 3 The power required by the load height is lifted for the belt, U is the power supply voltage, cos phi is the power factor of the motor, I 2 Motor current for idle state of finished belt, I 3 The working current of the finished belt motor is obtained.
The belt transport vertical height H is calculated by the following formula:
H＝L 0 ×sinθ (28)
in the formula (28), H is the vertical height of belt conveying, L 0 The belt length is the belt length, and θ is the belt inclination angle.
The belt conveying horizontal distance L is calculated by the following formula:
L＝L 0 ×cosθ (29)
in the formula (29), L is the horizontal distance of belt conveying and L 0 The belt length is the belt length, and θ is the belt inclination angle.
Belt conveying quantity Qt 1 Calculated by the following formula:
Qt 1 ＝(P 2 +P 3 )×367/(K×L+H) (30)
in equation (30), qt 1 For the belt conveying amount, P 2 Power required for horizontal load transfer of belt, P 3 The power required by lifting the load height of the belt is K is the resistance coefficient of the motor, L is the horizontal distance of belt conveying, and H is the vertical height of belt conveying.
Further, real-time capacity Qt of the crusher 2 Calculated by the following formula:
gt 2 ＝635×U×cosφ×(I 3 -I 2 )/[635×U×cosφ×(I 2 -I 1 )/3.6Gm×V+L 0 ×sinθ]
(31)
in equation (31), qt 2 The real-time capacity of the crusher is expressed as ton/hour; cos phi is the power factor of the motor, I 1 Motor idle current for crusher product motor, I 2 Motor current for idle state of finished belt, I 3 The working current of the finished belt motor is Gm is the mass of a conveying belt, a carrier roller and a steering roller, V is the belt speed, L 0 The belt length is the belt length, and θ is the belt inclination angle.
The crusher being set in a fixed time (t 1 To t 2 ) The total yield m of (2) is calculated by the following formula:
in the formula (32), m is the total output of the crusher in tons in a fixed time; qt 2 The real-time capacity of the crusher is realized.
The embodiment provides a mobile crusher working capacity metering system, compared with the prior art, the mobile crusher working capacity metering system adopts an acquisition module, a measurement module, a first calculation module and a second calculation module, and the power of a belt conveyor is acquired by acquiring the power of the belt conveyor, wherein the power of the belt conveyor comprises the power P required by idling of a belt 1 Power P required by horizontal load transmission of belt 2 And the power P required by the belt to lift the load height 3 The method comprises the steps of carrying out a first treatment on the surface of the Measuring motor idle current I of finished motor of crusher 1 Motor current I in idle state of finished belt, belt inclination angle theta and belt 2 And the working current I of the finished belt motor 3 The method comprises the steps of carrying out a first treatment on the surface of the Based on the obtained power of the belt conveyor and the measured motor idle current I of the finished motor of the crusher 1 Motor current I in idle state of finished belt, belt inclination angle theta and belt 2 And the working current I of the finished belt motor 3 Calculating the power P required by the belt during idle running 1 Power P consumed when the belt is loaded 2 +P 3 Vertical height H, horizontal distance L, resistance coefficient K of motor and amount Qt 1 Real-time capacity Qt of crusher 2 And the total yield m of the crusher in a fixed time. According to the working capacity metering system of the mobile crusher, provided by the embodiment, the effective output power of the belt motor of the crusher is calculated by measuring the no-load and load current of the motor, parameters such as the inclination angle of the belt, the length of the belt and the dead weight of the belt are used for calculating the weight of sand transported by the belt, and the quality of sand transported by the belt of a finished product of the crusher can be indirectly measured without adopting schemes which are difficult to realize such as direct weighing; the measuring means is simple and reliable, is not limited by the posture of the crusher, the inclination angle of the belt and the like, and is suitable for various working condition sites; the integrated level is high, and the communication protocol with the control system is only required to be set, so that the integrated level can be used as a universal element.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (2)
1. The working capacity metering method of the movable crusher is characterized by comprising the following steps of:
acquiring power of a belt conveyor, wherein the power of the belt conveyor comprises power P required by idling of a belt 1 Power P required by horizontal load transmission of belt 2 And the power P required by the belt to lift the load height 3 ；
Measuring motor idle current I of finished motor of crusher 1 Motor current I in idle state of finished belt, belt inclination angle theta and belt 2 And the working current I of the finished belt motor 3 ；
Based on the obtained power of the belt conveyor and the measured motor idle current I of the finished motor of the crusher 1 Motor current I in idle state of finished belt, belt inclination angle theta and belt 2 And the working current I of the finished belt motor 3 Calculating the power P required by the belt during idle running 1 Power P consumed when the belt is loaded 2 +P 3 The vertical height H of belt conveying, the horizontal distance L of belt conveying and the resistance coefficient K of a motor;
based on calculated power P required during belt idle 1 Power P consumed when the belt is loaded 2 +P 3 The vertical height H, the horizontal distance L and the resistance coefficient K of the motor are calculated to obtain the belt conveying quantity Qt 1 Real-time capacity Qt of crusher 2 And the total yield m of the crusher in a fixed time;
the motor idle current I of the finished motor of the crusher is measured 1 Motor current I in idle state of finished belt, belt inclination angle theta and belt 2 And the working current I of the finished belt motor 3 The method comprises the following steps:
when the belt motor of the crusher is not connected with the belt, the idle current of the motor is measured to be I through a current transducer 1 The method comprises the steps of carrying out a first treatment on the surface of the When the crusher product belt is in idle running after being unfolded, the inclination angle of the belt is measured to be theta by an inclination angle sensor, and the current when the product belt is unfolded in place but the loaded sand is not transmitted is measured by a current transmitter, namely the motor current in the idle running state of the product belt is I 2 The method comprises the steps of carrying out a first treatment on the surface of the When the crusher is openedWhen the belt motor works, the working current of the loaded finished belt motor is measured to be I in real time through the current transducer 3 ；
The power P required by the belt when idling 1 The method comprises the following steps:
P 1 ＝(C×f×L×3.6Gm×V)/367
wherein P is 1 The belt speed is equal to the speed of a belt conveyor, and is equal to the speed of a steering roller;
the belt horizontally transmits the power P required by the load 2 The method comprises the following steps:
P 2 ＝(C×f×L×Qt 1 )/367
wherein P is 2 The power required by the horizontal conveying load of the belt is C is the damping coefficient of the conveying belt and the bearing, f is the damping coefficient of the carrier roller, L is the effective horizontal conveying distance of the belt conveyor, and Qt 1 The belt conveying amount;
the power P required by the belt to lift the load height 3 The method comprises the following steps:
P 3 ＝Qt 1 ×H/367
wherein P is 3 The power, qt, required to raise the load height for the belt 1 The belt conveying amount is H, and the belt conveying vertical height is H;
the power P required by the belt when idling 1 Calculated by the following formula:
wherein P is 1 Is the power required by the idle running of the belt, U is the power supply voltage, cos phi is the power factor of the motor, I 1 Motor idle current for crusher product motor, I 2 Motor current in idle state of finished belt;
power P consumed by the belt when loaded 2 +P 3 Calculated by the following formula:
wherein P is 2 Power required for horizontal load transfer of belt, P 3 The power required by the load height is lifted for the belt, U is the power supply voltage, cos phi is the power factor of the motor, I 2 Motor current for idle state of finished belt, I 3 Working current of the finished belt motor;
the vertical belt conveying height H is calculated by the following formula:
H＝L 0 ×sinθ
wherein H is the vertical height of belt conveying, L 0 The length of the belt is the length of the belt, and theta is the inclination angle of the belt;
the belt conveying horizontal distance L is calculated by the following formula:
L＝L 0 ×cosθ
wherein L is the horizontal distance of belt conveying, L 0 The length of the belt is the length of the belt, and theta is the inclination angle of the belt;
the motor resistance coefficient K is calculated by the following formula:
K＝C×f＝P 1 ×367/L×3.6Gm×V
wherein K is the resistance coefficient of the motor, C is the damping coefficient of the conveyer belt and the bearing, f is the damping coefficient of the carrier roller, and P 1 The power required by the idling of the belt is L, the horizontal distance of belt conveying is L, gm is the mass of a conveying belt, a carrier roller and a steering roller, and V is the belt speed;
the belt conveying amount Qt 1 Calculated by the following formula:
Qt 1 ＝(P 2 +P 3 )×367/(K×L+H)
wherein Qt 1 For the belt conveying amount, P 2 Power required for horizontal load transfer of belt, P 3 The power required by lifting the load height of the belt is provided, K is the resistance coefficient of the motor, L is the horizontal distance of belt conveying, and H is the vertical height of belt conveying;
real-time capacity Qt of the crusher 2 Calculated by the following formula:
Qt 2 ＝635×U×cosφ×(I 3 -I 2 )/[635×U×cosφ×(I 2 -I 1 )/3.6Gm×V+L 0 ×sinθ]
wherein Qt 2 For real-time capacity of the crusher, cos phi is the power factor of the motor, I 1 Motor idle current for crusher product motor, I 2 Motor current for idle state of finished belt, I 3 The working current of the finished belt motor is Gm is the mass of a conveying belt, a carrier roller and a steering roller, V is the belt speed, L 0 The length of the belt is the length of the belt, and theta is the inclination angle of the belt;
the total yield m of the crusher in a fixed time is calculated by the following formula:
wherein m is the total yield of the crusher in a fixed time, qt 2 The real-time capacity of the crusher is realized.
2. A mobile crusher operating capacity metering system, comprising:
an acquisition module (10) for acquiring the power of the belt conveyor, the power of the belt conveyor comprising the power P required during the idle running of the belt 1 Power P required by horizontal load transmission of belt 2 And the power P required by the belt to lift the load height 3 ；
A measuring module (20) for measuring the motor idle current I of the finished motor of the crusher 1 Motor current I in idle state of finished belt, belt inclination angle theta and belt 2 And the working current I of the finished belt motor 3 ；
A first calculation module (30) for measuring the motor idle current I of the finished motor of the crusher according to the acquired power of the belt conveyor 1 Motor current I in idle state of finished belt, belt inclination angle theta and belt 2 And the working current I of the finished belt motor 3 Calculating the power P required by the belt during idle running 1 Power P consumed when the belt is loaded 2 +P 3 Belt conveying dropThe straight height H, the belt conveying horizontal distance L and the motor resistance coefficient K;
a second calculation module (40) for calculating the power P required by the belt during idle running 1 Power P consumed when the belt is loaded 2 +P 3 The vertical height H, the horizontal distance L and the resistance coefficient K of the motor are calculated to obtain the belt conveying quantity Qt 1 Real-time capacity Qt of crusher 2 And the total yield m of the crusher in a fixed time;
the measuring module (20) is particularly used for measuring the idle current of the motor of the crusher to be I through a current transducer when the belt motor of the crusher is not connected with a belt 1 The method comprises the steps of carrying out a first treatment on the surface of the When the crusher product belt is in idle running after being unfolded, the inclination angle of the belt is measured to be theta by an inclination angle sensor, and the current when the product belt is unfolded in place but the loaded sand is not transmitted is measured by a current transmitter, namely the motor current in the idle running state of the product belt is I 2 The method comprises the steps of carrying out a first treatment on the surface of the When the crusher starts to work, the working current of the carried finished belt motor is measured to be I in real time through the current transducer 3 ；
The power P required by the belt when idling 1 The method comprises the following steps:
P 1 ＝(C×f×L×3.6Gm×V)/367
wherein P is 1 The belt speed is equal to the speed of a belt conveyor, and is equal to the speed of a steering roller;
the belt horizontally transmits the power P required by the load 2 The method comprises the following steps:
P 2 ＝(C×f×L×Qt 1 )/367
wherein P is 2 The power required by the horizontal conveying load of the belt is C is the damping coefficient of the conveying belt and the bearing, f is the damping coefficient of the carrier roller, L is the effective horizontal conveying distance of the belt conveyor, and Qt 1 The belt conveying amount;
the power P required by the belt to lift the load height 3 The method comprises the following steps:
P 3 ＝Qt 1 ×H/367
wherein P is 3 The power, qt, required to raise the load height for the belt 1 The belt conveying amount is H, and the belt conveying vertical height is H;
the power P required by the belt when idling 1 Calculated by the following formula:
wherein P is 1 Is the power required by the idle running of the belt, U is the power supply voltage, cos phi is the power factor of the motor, I 1 Motor idle current for crusher product motor, I 2 Motor current in idle state of finished belt;
power P consumed by the belt when loaded 2 +P 3 Calculated by the following formula:
wherein P is 2 Power required for horizontal load transfer of belt, P 3 The power required by the load height is lifted for the belt, U is the power supply voltage, cos phi is the power factor of the motor, I 2 Motor current for idle state of finished belt, I 3 Working current of the finished belt motor;
the vertical belt conveying height H is calculated by the following formula:
H＝L 0 ×sinθ
wherein H is the vertical height of belt conveying, L 0 The length of the belt is the length of the belt, and theta is the inclination angle of the belt;
the belt conveying horizontal distance L is calculated by the following formula:
L＝L 0 ×cosθ
wherein L is the horizontal distance of belt conveying, L 0 The length of the belt is the length of the belt, and theta is the inclination angle of the belt;
the motor resistance coefficient K is calculated by the following formula:
K＝C×f＝P 1 ×367/L×3.6Gm×V
wherein K is the resistance coefficient of the motor, C is the damping coefficient of the conveyer belt and the bearing, f is the damping coefficient of the carrier roller, and P 1 The power required by the idling of the belt is L, the horizontal distance of belt conveying is L, gm is the mass of a conveying belt, a carrier roller and a steering roller, and V is the belt speed;
the belt conveying amount Qt 1 Calculated by the following formula:
Qt 1 ＝(P 2 +P 3 )×367/(K×L+H)
wherein Qt 1 For the belt conveying amount, P 2 Power required for horizontal load transfer of belt, P 3 The power required by lifting the load height of the belt is provided, K is the resistance coefficient of the motor, L is the horizontal distance of belt conveying, and H is the vertical height of belt conveying;
real-time capacity Qt of the crusher 2 Calculated by the following formula:
Qt 2 ＝635×U×cosφ×(I 3 -I 2 )/[635×U×cosφ×(I 2 -I 1 )/3.6Gm×V+L 0 ×sinθ]
wherein Qt 2 For real-time capacity of the crusher, cos phi is the power factor of the motor, I 1 Motor idle current for crusher product motor, I 2 Motor current for idle state of finished belt, I 3 The working current of the finished belt motor is Gm is the mass of a conveying belt, a carrier roller and a steering roller, V is the belt speed, L 0 The length of the belt is the length of the belt, and theta is the inclination angle of the belt;
the total yield m of the crusher in a fixed time is calculated by the following formula:
wherein m is the total yield of the crusher in a fixed time, qt 2 The real-time capacity of the crusher is realized.
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