CN103406999A - Stirring truck constant speed control apparatus and closed loop control method for achieving stirring truck constant speed - Google Patents
Stirring truck constant speed control apparatus and closed loop control method for achieving stirring truck constant speed Download PDFInfo
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- CN103406999A CN103406999A CN2013102981125A CN201310298112A CN103406999A CN 103406999 A CN103406999 A CN 103406999A CN 2013102981125 A CN2013102981125 A CN 2013102981125A CN 201310298112 A CN201310298112 A CN 201310298112A CN 103406999 A CN103406999 A CN 103406999A
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Abstract
The present invention discloses a stirring truck constant speed control apparatus and a closed loop control method for achieving a stirring truck constant speed. The constant speed control apparatus comprises: a measurement device for measuring a rotation speed and a rotation direction of a stirring truck tank body and outputting a measurement signal; a control device for receiving the measurement signal and outputting a control signal; a driving device for receiving the control signal and outputting a drive signal; a motor for performing the corresponding action according to the drive signal; and a transmission device and a hydraulic oil pump, wherein the transmission device transmits the action of the motor to the hydraulic oil pump to control discharge capacity of the hydraulic oil pump so as to adjust a rotation speed of the tank body. With the electrical control and mechanical control combined closed loop constant speed control apparatus and the method, the constant speed control apparatus cost can be reduced.
Description
Technical field
The present invention relates to the trucd mixer field, relate to particularly constant-speed control device of agitating truck and realize the closed loop control method of trucd mixer constant speed.
Background technology
Concrete mixer truck is a kind of special-purpose vehicle with transportation and ready-mixed concrete dual-use function.No matter vehicle is being run at high speed on highway or is being stopped before traffic lights, and tank body must keep the consistent continuously of rotating speed, otherwise there will be the phenomenons such as condensation, layering and segregation when the long-distance transportation concrete, greatly affects concrete quality.When the loading, unloading material, concrete mixer truck also will maintain on certain rotating speed of target, so that handling safety is efficient.
Yet in transportation and loading, unloading material process, along with engine speed changes, hydraulic oil pump changes fuel delivery, the rotating speed of the tank body rotating speed that also can thereupon depart from objectives.So, not only increased engine power consumption, accelerate the wearing and tearing of mixing drum, when affect the concrete mixer truck driving performance, also can't the uniform stirring concrete, the reduction concrete quality.So, in transportation and loading, unloading material process, keep trucd mixer constant-speed operation on corresponding rotating speed of target, it is the important topic of the confidential solution of concrete-agitating.
Traditional hydraulic drive scheme, change the hydraulic oil pump swash plate by joystick and control pull bar, on price, has advantage, welcome by producer and user.But the defect of this scheme also clearly, because with the rotating speed of joystick change tank body, can not reflect in time the variation of tank body rotating speed, the constant speed error is large, along with the development of Building technology, also more and more higher to the concrete quality requirement, this conventional hydraulic transmission scheme can not satisfy the demands.
Along with the development of technology, automatically controlled constant-speed control system has appearred.Fig. 1 is the block diagram that a kind of existing electric control constant velocity control device is shown.As shown in Figure 1, operating personnel are by remote controller or closely control cabinet 1 and control master controller 2, master controller 2 coordinates to control throttle actuator 3 and oil pump actuator 4, throttle actuator 3 control engine 5 work, the rotating speed of 4 control oil pump 6 work of oil pump actuator and then control mixing drum 7, simultaneously again with the rotating speed of a speed probe 8 measurement mixing drums 7 and to master controller 2 output feedback signals, make adjustment that master controller 2 can the be real-time control to throttle actuator 3 and oil pump actuator 4, reach the purpose of mixing drum 7 constant speed runnings.The oil pump that constant-speed control device illustrated in fig. 1 adopts is automatically controlled pump, and automatically controlled pump cost ratio standard machinery pump is high, causes the cost of this constant-speed control device high, and pure electric control gear is not easy to investigation, maintenance after being out of order.
Summary of the invention
The purpose of this invention is to provide a kind of lower-cost automatically controlled and mechanical closed loop constant-speed control device and method combined of controlling.
For achieving the above object, according to an aspect of the present invention, provide a kind of mixer constant-speed control device, described mixer constant-speed control device comprises: measurement mechanism, described measurement mechanism for measure described trucd mixer tank body rotating speed and turn to, and output measuring-signal; Control device, be used to receiving described measuring-signal, and the output control signal; Drive unit, be used to receiving described control signal, and the corresponding signal that drives of output; Motor, make corresponding action according to described driving signal; Transmission device and hydraulic oil pump, described transmission device is transferred to described hydraulic oil pump to control described hydraulic oil pump delivery by the action of described motor, regulates the rotating speed of described tank body.Further, described measurement mechanism is measured in real time the rotating speed of described tank body and is formed feedback to described control device output measuring-signal, forms thus an automatically controlled and mechanical closed loop constant-speed control device combined of controlling.
Preferably, described hydraulic oil pump can be common mechanical pump.
Replacedly, measurement mechanism comprises one or more approach switchs.
Replacedly, measurement mechanism is arranged on described tank body, reductor or the tugboat of described trucd mixer.
Replacedly, motor can be stepper motor, linear electric motors or servomotor.
Preferably, described transmission device comprises pinion and sector gear, described pinion is arranged on the output shaft of described motor, described sector gear is arranged on the control pull bar of described hydraulic oil pump, described pinion and the engagement of described sector gear, when described electric machine rotation, by described pinion, drive described sector gear, and then the described control pull bar that drives described hydraulic oil pump is adjusted described hydraulic oil pump delivery.
Replacedly, described transmission device can adopt gear connecting way, belt connected mode or bracing wire connected mode etc.
According to a further aspect in the invention, provide a kind of closed loop control method of realizing the trucd mixer constant speed, described method comprises: by measurement mechanism, measure turning to of described agitating lorry tank body and rotating speed, and the output measuring-signal; Control device receives the described measuring-signal of described measurement mechanism output, and the output control signal; Drive unit receives described control signal the corresponding signal that drives of output of described control device output; Described drive motor is made corresponding action; By transmission device, the described action of described motor is transferred to the control pull bar of hydraulic oil pump, to control described hydraulic oil pump delivery, regulates the rotating speed of described tank body.
Further, in trucd mixer transportation, charging process and discharge process, to the requirement difference of tank body rotating speed.Because constant speed control method provided by the invention and device can be controlled according to different preset values the rotation of tank bodies.Therefore, can, by described control device, setting different preset values, make the constant speed of tank body is controlled to the needs that meet different phase.
The present invention has adopted closed-loop control to regulate form, compares and greatly reduces the constant speed error with traditional hydraulic transmission mode, and according to the actual test to according to a preferred embodiment of the present invention, its constant speed error can be controlled in 10%.
Further, can adopt the standard machinery pump according to the hydraulic oil pump of the preferred embodiment of the present invention, compare and reduced cost with the Constant-Speed Unit that uses automatically controlled pump.Simultaneously, according to the automatically controlled and mechanical single close-loop control mode combine of controlling of the preferred embodiment of the present invention, also make after breaking down the investigation maintenance of being more convenient for.
Further, the gear drive adopted according to a preferred embodiment of the present invention, low cost of manufacture, installation compactness and easy to maintenance.
The accompanying drawing explanation
Accompanying drawing shows a preferred embodiment of the present invention in the mode of example.In the drawings, identical Reference numeral means same or analogous parts, wherein:
Fig. 1 is the block diagram that a kind of existing electric control constant velocity control device is shown.
Fig. 2 is the block diagram illustrated according to constant-speed control device of the present invention.
Fig. 3 is structural representation in accordance with a preferred embodiment of the present invention.
Description of reference numerals
1, remote controller or closely control cabinet 2, master controller
3, throttle actuator 4, oil pump actuator
5, engine 6, oil pump
7, mixing drum 8, speed probe
10, measurement mechanism 20, control device
30, drive unit 40, motor
50, transmission device 51, pinion
52, sector gear 60, hydraulic oil pump
70, tank body
The specific embodiment
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is further described.
According to an aspect of the present invention, provide a kind of constant-speed control device of agitating truck, described constant-speed control device of agitating truck comprises: measurement mechanism, described measurement mechanism for measure described trucd mixer tank body rotating speed and turn to, and output measuring-signal; Control device, be used to receiving the described measuring-signal of described measurement mechanism output, and the output control signal; Drive unit, be used to receiving the described control signal of described control device output, the corresponding signal that drives of output; Motor, make corresponding action according to the described driving signal of described drive unit output; Transmission device and hydraulic oil pump, described transmission device is transferred to described hydraulic oil pump to control described hydraulic oil pump delivery by the action of described motor, regulates the rotating speed of described tank body.
According to another aspect of the present invention, also provide a kind of closed loop control method of realizing the trucd mixer constant speed, it is characterized in that, described method comprises: by measurement mechanism, measure turning to of described agitating lorry tank body and rotating speed, and the output measuring-signal; Control device receives the described measuring-signal of described measurement mechanism output, and the output control signal; Drive unit receives described control signal the corresponding signal that drives of output of described control device output; Described drive motor is made corresponding action; By transmission device, the described action of described motor is transferred to the control pull bar of hydraulic oil pump, to control described hydraulic oil pump delivery, regulates the rotating speed of described tank body.
Preferably, measuring-signal and preset value that control device will receive compare, and when described measuring-signal was greater than described preset value, described control device sent the described control signal that rotating speed is reduced; Described measuring-signal and described preset value that control device will receive compare, and when described measuring-signal was less than described preset value, described control device sent the described control signal that rotating speed is increased.
Preferably, hydraulic oil pump used in the present invention is mechanical pump.Mechanical pump and automatically controlled pump structure compared is simple, cost is low, easy to maintenance.
Preferably, the installation site of measurement mechanism of the present invention is variable, for example can be arranged on the fluted disc on tugboat, can be arranged on reductor, also can be directly installed on tank body, namely measurement mechanism can be arranged on and can directly measure arbitrarily or indirectly measure tank body rotating speed and the position turned to according to speed ratio.
Interchangeable, the present invention can adopt various ways and device measure rotating speed and turn to, and for example described rotating speed and transfer can be metallicity or magnetic approach switch or other existing testing the speed and direction-finding device.
Interchangeable, the present invention can adopt the dedicated control device that can smoothly finely tune of knob, also can adopt the simpler control circuit of structure.
Interchangeable, the drive unit that the present invention adopts only needs to coordinate the correct drive motors of control device to get final product, and can be various applicable drive unit of the prior art or circuit.
Interchangeable, the present invention can adopt stepper motor, linear electric motors or servomotor etc.
Interchangeable, the present invention can adopt multiple transmission device, such as adopting gear connection, belt pulley connection etc., and when described constant-speed control device is used linear electric motors, the transmission device that can adopt bracing wire to connect.
Fig. 2 is the block diagram illustrated according to constant-speed control device of the present invention.As shown in Figure 2, measurement mechanism 10 measure in real time trucd mixer tank body 70 rotating speed and turn to, and to control device 20 output measuring-signals.Control device 20 after receiving described measuring-signal compares it and preset value, and when the rotating speed of described tank body was greater than preset value, control device 20 sent the control signal that rotating speed is reduced to drive unit 30; When the rotating speed of described tank body was less than preset value, control device 20 sent the control signal that rotating speed is increased to drive unit 30.The control signal that drive unit 30 sends according to control device 20 and the operating characteristic of motor 40, process described control signal, then exports corresponding driving signal to motor 40.Motor 40 is made corresponding action according to described driving signal, and controls by the swash plate of transmission device 50 drive hydraulic oil pumps 60 discharge capacity that pull bar is controlled hydraulic oil pump 60, reaches the purpose of the rotating speed of regulating described tank body 70.
For example, in transportation, suppose 2 to turn/min is the desirable rotary speed of tank body.When the throttle of trucd mixer increased, if there is no constant-speed control device, the rotating speed of tank body may be accelerated thereupon.If installed according to constant-speed control device of the present invention, when throttle increased, when tank body 70 had just started to have the trend that rotating speed accelerates, measurement mechanism 10 sent to control device 20 to this real-time measuring-signal in time; Control device 20 contrasts find that the rotating speed of tank body 70 is greater than 2 and turns/min, to drive unit 30, send the control signal that rotating speed is reduced immediately; Drive unit 30 processing control signals drive motors 40; Motor 40 rotates suitable angle and drives hydraulic oil pump 60 by transmission device 50; Hydraulic oil pump 60 reduces output flow at once, makes the power of tank body 70 reduce rotating speed slack-off, turns/min until the tank body rotating speed is returned to 2.Realize thus the constant control of tank body rotating speed, also made the fuel-economy type of trucd mixer be improved.
Fig. 3 is structural representation according to a preferred embodiment of the present invention.Embodiment as shown in Figure 3, measurement mechanism 10 comprises near a plurality of approach switchs the fluted disc be positioned on tugboat, it is not shown that tank body 70(Fig. 3 is measured in the motion of responding to the metal inductor on fluted disc by approach switch) rotating speed and turn to, alternatively, its turn signal also can be received and be processed by other equipment such as GPS, and its tach signal is exported to control device 20.Control device 20 is connected with measurement mechanism 10, with drive unit 30, is connected simultaneously, if rotating speed is greater than preset value, the pulse control signal that just to drive unit output, rotating speed is reduced, corresponding, if rotating speed is less than preset value, to drive unit output, be the pulse control signal that rotating speed increases.Drive unit 30 in Fig. 3 amplifies the pulse control signal received from control device 20 and sends stepper motor 40 to.After receiving pulse signal, stepper motor 40 can turn over a corresponding step angle.Pinion 51 is arranged on the output shaft of stepper motor 40, and sector gear 52 is fixed on the swash plate of hydraulic oil pump 60 and controls on pull bar, pinion 51 and sector gear 52 engagements.In case stepper motor 40 rotates suitable angle forward or backwards, will drive sector gear 52 by pinion 51, and then drive the swash plate control pull bar of hydraulic oil pump 60, the output flow of hydraulic oil pump 60 is changed, so control the rotating speed of tank body 70.Again because 10 real-time control measurements of the measured device of rotating speed of tank body 70, and metrical information is fed back to control device 20, make control device 20 can judge in time whether the rotating speed of current tank body 70 makes it.If do not reach, just continue to adjust until reach desired value; If reached the desired value of constant speed, just wouldn't, by drive unit 30 to motor 40 transmitted signals, make the swash plate of hydraulic oil pump 60 maintain current angle.
In the present embodiment, hydraulic oil pump 60 is mechanical pumps.
According to practical measurement, the constant speed error of above preferred embodiment can be controlled in 10%.
Although disclose embodiments of the invention for purpose of explanation, it should be understood that as the invention is not restricted to this, and it will be understood by those skilled in the art that the various modifications that do not depart from the scope and spirit of the present invention, increase and substitute to be possible.
Correspondingly, any and all modifications, variation or equivalent arrangement should take into account scope of the present invention, and detailed scope of the present invention will be open by the claims of enclosing.
Claims (10)
1. a constant-speed control device of agitating truck, is characterized in that, described constant-speed control device of agitating truck comprises:
Measurement mechanism, described measurement mechanism is for measuring the rotating speed of tank body of described trucd mixer, and the output measuring-signal;
Control device, be used to receiving the described measuring-signal of described measurement mechanism output, and the output control signal;
Drive unit, be used to receiving the described control signal of described control device output, output drive signal;
Motor, make corresponding action according to the described driving signal of described drive unit output;
Transmission device and hydraulic oil pump, described transmission device is transferred to described hydraulic oil pump to control described hydraulic oil pump delivery by the action of described motor, regulates the rotating speed of described tank body.
2. constant-speed control device of agitating truck according to claim 1, is characterized in that, described hydraulic oil pump is mechanical pump.
3. constant-speed control device of agitating truck according to claim 2, is characterized in that, described measurement mechanism is further measured the turning to of tank body of described trucd mixer.
4. constant-speed control device of agitating truck according to claim 2 is characterized in that:
Described measuring-signal and preset value that described control device will receive compare, and when described measuring-signal was greater than described preset value, described control device sent the described control signal that rotating speed is reduced;
Described measuring-signal and described preset value that described control device will receive compare, and when described measuring-signal was less than described preset value, described control device sent the described control signal that rotating speed is increased.
5. constant-speed control device of agitating truck according to claim 2, it is characterized in that, described transmission device comprises pinion and sector gear, described pinion is arranged on the output shaft of described motor, described sector gear is arranged on the control pull bar of described hydraulic oil pump, and described pinion and the engagement of described sector gear, when described electric machine rotation, by described pinion, drive described sector gear, and then the described control pull bar that drives described hydraulic oil pump is adjusted described hydraulic oil pump delivery.
6. a closed loop control method of realizing the trucd mixer constant speed, is characterized in that, described method comprises:
By measurement mechanism, measure the rotating speed of described agitating lorry tank body, and the output measuring-signal;
Control device receives the described measuring-signal of described measurement mechanism output, and the output control signal;
Drive unit receives the described control signal of described control device output, and output drive signal;
Described drive motor is made corresponding action;
By transmission device, the described action of described motor is transferred to the control pull bar of hydraulic oil pump, to control described hydraulic oil pump delivery, regulates the rotating speed of described tank body.
7. method according to claim 6, is characterized in that, described hydraulic oil pump is mechanical pump.
8. method according to claim 7, is characterized in that, described measurement mechanism is further measured turning to of described trucd mixer.
9. method according to claim 7 is characterized in that:
Described measuring-signal and preset value that described control device will receive compare, and when described measuring-signal was greater than described preset value, described control device sent the described control signal that rotating speed is reduced;
Described measuring-signal and described preset value that described control device will receive compare, and when described measuring-signal was less than described preset value, described control device sent the described control signal that rotating speed is increased.
10. the closed loop control method of realizing the trucd mixer constant speed according to claim 7, it is characterized in that, by being arranged on the sector gear of pinion engagement drive installation on the described control pull bar of described hydraulic oil pump on described motor, the described hydraulic oil pump of described driven by motor.
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| CN2013102981125A CN103406999A (en) | 2013-07-16 | 2013-07-16 | Stirring truck constant speed control apparatus and closed loop control method for achieving stirring truck constant speed |
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| CN106637804A (en) * | 2015-10-30 | 2017-05-10 | 青岛海尔洗衣机有限公司 | Driving method of stirring motor in the flocculation treatment process and washing machine |
| CN107790013A (en) * | 2016-09-07 | 2018-03-13 | 广东新宝电器股份有限公司 | Constant-speed stirring method and device |
| CN107790012A (en) * | 2016-09-07 | 2018-03-13 | 广东新宝电器股份有限公司 | Constant-speed stirring method and device |
| CN108422558A (en) * | 2018-01-26 | 2018-08-21 | 北汽福田汽车股份有限公司 | Servo Control method, apparatus and trucd mixer |
| CN112693000A (en) * | 2020-12-28 | 2021-04-23 | 三一汽车制造有限公司 | Unloading control method and device and mixing station |
| CN116512430A (en) * | 2023-06-20 | 2023-08-01 | 一汽解放汽车有限公司 | Stirring tank rotation speed control system, stirring tank rotation speed control method, computer equipment and storage medium |
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| CN112693000B (en) * | 2020-12-28 | 2022-09-13 | 三一汽车制造有限公司 | Unloading control method and device and mixing station |
| CN116512430A (en) * | 2023-06-20 | 2023-08-01 | 一汽解放汽车有限公司 | Stirring tank rotation speed control system, stirring tank rotation speed control method, computer equipment and storage medium |
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Application publication date: 20131127 |