CN103465784B - Power distribution system and control method, concrete pump truck, construction machinery and equipment - Google Patents

Power distribution system and control method, concrete pump truck, construction machinery and equipment Download PDF

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Publication number
CN103465784B
CN103465784B CN201310414687.9A CN201310414687A CN103465784B CN 103465784 B CN103465784 B CN 103465784B CN 201310414687 A CN201310414687 A CN 201310414687A CN 103465784 B CN103465784 B CN 103465784B
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China
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described
transfer device
connected
speed
output shaft
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CN201310414687.9A
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CN103465784A (en
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万梁
陈祺
王佳茜
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中联重科股份有限公司
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Abstract

The invention provides a kind of power distribution system and control method, concrete pump truck, construction machinery and equipment.This power distribution system comprises: driving engine (10); First transfer device (20), input shaft is connected to the output shaft of driving engine (10); Speed setting unit (30), is connected to the first transfer device (20), and exports adjustable rotating speed by the output shaft of speed setting unit (30); Second transfer device (40), input shaft is connected to speed setting unit (30); Actuating unit (50), is connected to the second transfer device (40); And control unit (60), according to the job information of the driving engine received (10), actuating unit (50), control the rotating speed that speed setting unit (30) exports the second transfer device (40) to.According to power distribution system of the present invention, diesel motor rate of load condensate in prior art can be solved unstable, the problem that energy charge is larger.

Description

Power distribution system and control method, concrete pump truck, construction machinery and equipment

Technical field

The present invention relates to hydraulic machinery field, in particular to a kind of power distribution system and control method, concrete pump truck, construction machinery and equipment.

Background technology

In concrete pump truck work progress, the net output of diesel motor exports to pumparound, distribution system, stirring and washing system and boom system by Hydraulic Pump, and each system consumed power under different operating mode is different.

Fig. 1 is the system construction drawing of concrete pump truck.Main pump 52 ', constant pressure pump 53 ', gear type pump 54 ' and arm-pump 51 ' are cascaded.Pump truck is in work progress, and moment of torsion is passed to string pump by transmission shaft and auxiliary gear box 20 ' by diesel motor 10 '.Main pump 52 ' driving pumping load on string pump, constant pressure pump 53 ' drives and distributes load, and gear type pump 54 ' drives stirring and washing load, and arm-pump 51 ' drives the load of jib supporting leg, and the rotating speed of diesel motor 10 ' is by going here and there pump speed decision.

Because the speed of string pump determined by the load power demand under current working, therefore concrete pump truck is in work progress, the rotating speed of diesel motor can change with the speed needed for string pump, cause diesel motor rate of load condensate unstable, energy charge is comparatively large, and can reduce the service life of diesel motor.

Summary of the invention

The present invention aims to provide a kind of power distribution system and control method, concrete pump truck, construction machinery and equipment, unstable to solve diesel motor rate of load condensate in prior art, the problem that energy charge is larger.

To achieve these goals, according to an aspect of the present invention, provide a kind of power distribution system, comprising: driving engine; First transfer device, the first end of the input shaft of the first transfer device is connected to the output shaft of driving engine; Speed setting unit, is connected to the output shaft of the first transfer device, and exports adjustable rotating speed by the output shaft of speed setting unit; Second transfer device, the input shaft of the second transfer device is connected to the output shaft of speed setting unit; Actuating unit, is connected to the output shaft of the second transfer device; And control unit, according to the job information of the driving engine received, actuating unit, control the rotating speed that speed setting unit exports the second transfer device to.

Further, speed setting unit is hydraulic speed regulating device.

Further, speed setting unit comprises: volume adjustable hydraulic pump, is connected to the output shaft of the first transfer device, and is hydraulic energy by the changes mechanical energy of the output shaft of the first transfer device; Fixed displacement motor, is connected with volume adjustable hydraulic pump pipeline, and output mechanical energy; The input shaft of the second transfer device is connected to the output shaft of fixed displacement motor, and control unit is connected to fixed displacement motor and volume adjustable hydraulic pump respectively, and the output discharge capacity of control variable Hydraulic Pump.

Further, speed setting unit comprises: quantitative hydraulic pump, is connected to the output shaft of the first transfer device, and is hydraulic energy by the changes mechanical energy of the output shaft of the first transfer device; Variable-dis-placement motor, is connected with quantitative hydraulic pump pipeline, and output mechanical energy; The input shaft of the second transfer device is connected to the output shaft of variable-dis-placement motor, and control unit is connected to variable-dis-placement motor and quantitative hydraulic pump respectively, and the output discharge capacity of control variable motor.

Further, speed setting unit comprises: volume adjustable hydraulic pump, is connected to the output shaft of the first transfer device, and is hydraulic energy by the changes mechanical energy of the output shaft of the first transfer device; Variable-dis-placement motor, is connected with volume adjustable hydraulic pump pipeline, and output mechanical energy; The input shaft of the second transfer device is connected to the output shaft of variable-dis-placement motor, and control unit is connected to variable-dis-placement motor and volume adjustable hydraulic pump respectively, and the output discharge capacity of control variable motor.

Further, actuating unit comprises the string pump of the output shaft being connected to the second transfer device, and string pump comprises at least two pumps of serial connection mutually, and at least two pumps are selected from: arm-pump, controls the load of jib supporting leg; Main pump, controls pumping load; Constant pressure pump, controls to distribute load; And gear type pump, control stirring and washing load.

Further, the second end of the input shaft of the first transfer device is connected to vehicle-bridge system.

According to a further aspect in the invention, provide a kind of control method of power distribution system, comprising: speed setting unit is driven the output shaft being connected to driving engine; Actuating unit is driven the output shaft being connected to speed setting unit; Obtain the output speed of driving engine; Obtain the rotating speed that actuating unit is required under current working; According to the output speed of the driving engine got and the speed adjustment speed setting unit of actuating unit, make the required rotational speed matches of the output speed of speed setting unit and actuating unit.

Further, the step being connected to the output shaft of driving engine is driven to comprise speed setting unit: the input shaft output shaft of driving engine being connected to the first transfer device, and the output shaft input shaft of speed setting unit being connected to the first transfer device; Drive the step being connected to the output shaft of speed setting unit to comprise actuating unit: the input shaft output shaft of speed setting unit being connected to the second transfer device, and the output shaft of the second transfer device is connected to actuating unit.

Further, speed setting unit comprises volume adjustable hydraulic pump and fixed displacement motor, hydraulic circuit is formed between volume adjustable hydraulic pump and fixed displacement motor, the input shaft of volume adjustable hydraulic pump drives with the output shaft of the first transfer device and is connected, the output shaft of fixed displacement motor drives with the input shaft of the second transfer device and is connected, according to the output speed of the driving engine got and the speed adjustment speed setting unit of actuating unit, the step of the required rotational speed matches of the output speed of speed setting unit and actuating unit is comprised: the output speed of rotating speed determination fixed displacement motor needed for actuating unit, discharge capacity needed for the discharge capacity determination volume adjustable hydraulic pump of the output speed of the second transfer device, the output speed of driving engine and fixed displacement motor, regulated variable hydraulic pressure capacity of pump is to required discharge capacity.

Further, the required discharge capacity of volume adjustable hydraulic pump obtains by the following method:

V g 1 = n p n e * V g 2 i 1 i 2

Wherein i 1be the transmitting ratio of the first transfer device, i 2be the transmitting ratio of the second transfer device, V g1for variable delivery hydraulic capacity of pump, V g2for the discharge capacity of fixed displacement motor, n pbe the output speed of the second transfer device, n efor the output speed of driving engine.

Further, the output speed of driving engine is determined according to the bearing power of power distribution system.

According to a further aspect in the invention, provide a kind of concrete pump truck, comprise power distribution system, this power distribution system is above-mentioned power distribution system.

In accordance with a further aspect of the present invention, provide a kind of construction machinery and equipment, comprise power distribution system, this power distribution system is above-mentioned power distribution system.

Apply technical scheme of the present invention, power distribution system comprises: driving engine; First transfer device, the first end of the input shaft of the first transfer device is connected to the output shaft of driving engine; Speed setting unit, is connected to the output shaft of the first transfer device, and exports adjustable rotating speed by the output shaft of speed setting unit; Second transfer device, the input shaft of the second transfer device is connected to the output shaft of speed setting unit; Actuating unit, is connected to the output shaft of the second transfer device; And control unit, according to the job information of the driving engine received, actuating unit, control the rotating speed that speed setting unit exports the second transfer device to.Because control unit can determine horsepower output needed for driving engine by the gross horsepower in advance needed for actuating unit, and the rotating speed of horsepower output determination driving engine according to driving engine, therefore, the invariablenes turning speed of driving engine can be made after determining horsepower output needed for driving engine.In the course of the work, if the rotating speed needed for actuating unit changes, can directly be adjusted the rotating speed that driving engine exports by speed setting unit, the rotating speed that speed setting unit is exported meets the need of work of actuating unit, therefore without the need to adjusting the rotating speed of driving engine again, also the problem regulating the engine load instability brought in the process of engine speed is just avoided, decrease the problem that power distribution system energy charge is excessive, extend the service life of driving engine.

Accompanying drawing explanation

The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:

Fig. 1 shows the structural representation of power distribution system of the prior art;

Fig. 2 shows the structural representation of the power distribution system according to the first embodiment of the present invention;

Fig. 3 shows the workflow diagram of the power distribution system according to the first embodiment of the present invention; And

Fig. 4 shows the structural representation of power distribution system according to a second embodiment of the present invention.

Reference numeral: 10, driving engine; 20, the first transfer device; 30, speed setting unit; 40, the second transfer device; 50, actuating unit; 60, control unit; 70, vehicle-bridge system; 31, volume adjustable hydraulic pump; 32, fixed displacement motor; 33, variable-dis-placement motor; 51, arm-pump; 52, main pump; 53, constant pressure pump; 54, gear type pump.

Detailed description of the invention

Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.

As shown in Figures 2 to 4, according to embodiments of the invention, power distribution system comprises: driving engine 10; The first end of the input shaft of the first transfer device 20, first transfer device 20 is connected to the output shaft of driving engine 10; Speed setting unit 30, is connected to the output shaft of the first transfer device 20, and exports adjustable rotating speed by the output shaft of speed setting unit 30; The input shaft of the second transfer device 40, second transfer device 40 is connected to the output shaft of speed setting unit 30; Actuating unit 50, is connected to the output shaft of the second transfer device 40; And control unit 60, according to the job information of the driving engine 10 received, actuating unit 50, control the rotating speed that speed setting unit 30 exports the second transfer device 40 to.The first transfer device 20 is herein the first auxiliary gear box, and the second transfer device 40 is the second auxiliary gear box.

The speed setting unit 30 at this place can be hydraulic speed regulating device, also can be mechanical adjustable speed drive, its objective is that driving engine 10 rotation speed change brought by the adjustment of rotational speed of actuating unit 50 is transferred to speed setting unit 30, make speed setting unit 30 can export the rotating speed being applicable to actuating unit 50 needs when driving engine 10 rotating speed is constant, the various problems avoiding driving engine 10 adjustment of rotational speed to bring with this.

Because control unit 60 can determine horsepower output needed for driving engine 10 by the gross horsepower in advance needed for actuating unit 50, and the rotating speed of horsepower output determination driving engine 10 according to driving engine 10, therefore, the invariablenes turning speed of driving engine 10 can be made after determining horsepower output needed for driving engine 10.In the course of the work, if the rotating speed needed for actuating unit 50 changes, can directly be adjusted the rotating speed that driving engine 10 exports by speed setting unit 30, the rotating speed that speed setting unit 30 is exported meets the need of work of actuating unit 50, therefore without the need to adjusting the rotating speed of driving engine 10 again, also the problem regulating the driving engine 10 load instability brought in the process of driving engine 10 rotating speed is just avoided, decrease the problem that power distribution system energy charge is excessive, extend the service life of driving engine 10.

For concrete pump truck, the present invention is illustrated below.The actuating unit 50 of concrete pump truck comprises the string pump of the output shaft being connected to the second transfer device 40, this string pump comprise mutual serial connection following at least two: arm-pump 51, controls the load of jib supporting leg; Main pump 52, controls pumping load; Constant pressure pump 53, controls to distribute load; And gear type pump 54, control stirring and washing load.In the present embodiment, above-mentioned arm-pump 51, main pump 52, constant pressure pump 53 and gear type pump 54 are serially connected by the output shaft of the second transfer device 40, thus formation string pump.When concrete pump truck is in work process, driving engine 10 drives string pump, now the rotating speed n of driving engine 10 by speed setting unit 30 ewith string revolution speed n p(i.e. the output speed of the second transfer device 40) has nothing to do, and can keep constant, string revolution speed n pregulated by speed setting unit 30.

In the present embodiment, the power distribution system of concrete pump truck can also comprise vehicle-bridge system 70, vehicle-bridge system 70 drives the second end being connected to the input shaft of the first transfer device 20 by coupler, and be connected with the first transfer device 20 when concrete pump truck is in motoring condition, make power distribution system by driving engine 10 Direct driver vehicle-bridge system, thus construction machinery and equipment motion can be driven.In such cases, the rotating speed n of driving engine 10 edetermined by vehicle-bridge system 70.

As shown in Figures 2 and 3, according to the first embodiment of the present invention, speed setting unit 30 comprises: volume adjustable hydraulic pump 31, is connected to the output shaft of the first transfer device 20, and be hydraulic energy by the changes mechanical energy of the output shaft of the first transfer device 20, make hydraulic oil form high pressure oil; Fixed displacement motor 32, is connected with volume adjustable hydraulic pump 31 pipeline, and rotates under the driving of hydraulic oil, by output shaft output mechanical energy; The input shaft of the second transfer device 40 is connected to the output shaft of fixed displacement motor 32, and control unit 60 is connected to fixed displacement motor 32 and volume adjustable hydraulic pump 31 respectively, and the output discharge capacity of control variable Hydraulic Pump 31.

In the present embodiment, the installation method of the power distribution system of concrete pump truck is as follows:

First fixedly mount driving engine 10, then by coupler, the first end of the input shaft of the first auxiliary gear box is connected on the output shaft of driving engine 10, and the second end of the input shaft of the first auxiliary gear box is connected with vehicle-bridge system 70 by coupler.

Then the input shaft of the volume adjustable hydraulic pump 31 of speed setting unit 30 is connected on the output shaft of the first auxiliary gear box, and be connected to form closed hydraulic loop by between fixed displacement motor 32 and volume adjustable hydraulic pump 31 by hydraulic tubing, then volume adjustable hydraulic pump 31 is passed into oil sources.Afterwards the input shaft of the second auxiliary gear box is connected on the output shaft of fixed displacement motor 32, and arm-pump 51 is connected in series on the output shaft of the second auxiliary gear box, main pump 52, constant pressure pump 53 and gear type pump 54, then arm-pump 51 is connected with the load of jib supporting leg, arm-pump 51 is made to drive jib supporting leg load action, main pump 52 is connected with pumping load, main pump 52 is made to drive pumparound to perform pump action, constant pressure pump 53 is connected with distribution load, constant pressure pump 53 is driven and distributes load dispense pressure, finally gear type pump 54 is connected with stirring and washing load, the load of gear pump driven stirring and washing is performed stir or cleaning action.

After above-mentioned connection structure completes, by control unit 60 respectively with driving engine 10, volume adjustable hydraulic pump 31, the load of jib supporting leg, pumping load, distribute load and stirring and washing load is connected, and control the work of whole power distribution system by control unit 60.

The control process of the power distribution system of concrete pump truck is as follows:

First determine when concrete pump truck is in pumping operating mode, the required load of each mechanism.The bearing power defining method of each mechanism is as follows:

For jib leg system, need the string revolution speed first determined needed for jib work, when then determining to meet this rotating speed according to this rotating speed, the required flow Q3 of arm-pump 51, then determines the power N3 consumed needed for the load of jib supporting leg according to the delivery pressure P3 of arm-pump 51.

For pumparound, string revolution speed required when needing first to determine that pumparound works, the required flow Q1 of main pump 52, the power N1 of required consumption when then determining that pumparound works according to the delivery pressure P1 of main pump 52 when then determining to meet this rotating speed according to this rotating speed.

For distribution system, dispense pressure P2 required when needing first to determine that distribution system works, then according to the power N2 distributing required consumption when oil pump flow Q2 determines that distribution system works.

For stirring and washing system, string revolution speed required when needing first to determine stirring and washing system works, then the required flow Q4 of situation lower tooth wheel pump 54 that will meet this rotating speed is determined according to this rotating speed, the power N4 of required consumption when then determining stirring and washing system works according to the delivery pressure P4 of gear type pump 54.

Bearing power needed for above-mentioned each system can determine the bearing power N=N1+N2+N3+N4 needed for concrete pump truck, and then control unit can determine rational engine speed n according to the bearing power N of this concrete pump truck e, in the working process of concrete pump truck, driving engine 10 can work with this rotating speed constant speed.

If under pump truck is in pumping operating mode, then string revolution speed n pneeded for main pump 52, rotating speed determined; If pump truck is in jib landing leg stretching operating mode, then string revolution speed n pneeded for arm-pump 51, rotating speed determined; If pump truck is in stirring and washing operating mode, then string revolution speed n pneeded for gear type pump 54, rotating speed determined.For different operating modes, string revolution speed n pfinally determine according to rotating speed required under this operating mode.

Determining string revolution speed n pafterwards, due to the discharge capacity V of fixed displacement motor 32 g2necessarily, and the output speed n of driving engine 10 ealso determine, now can according to the required discharge capacity V exported of following formula determination volume adjustable hydraulic pump 31 g1, and by control unit 60 regulated variable Hydraulic Pump 31 to this required discharge capacity V g1, the rotating speed that driving engine 10 is exported, when arriving string pump, finally can meet the rotation speed requirements of string pump.

Formula is specific as follows:

V g 1 = n p n e * V g 2 i 1 i 2

Wherein i 1be the transmitting ratio of the first transfer device 20, i 2be the transmitting ratio of the second transfer device 40, V g1for the discharge capacity of volume adjustable hydraulic pump 31, V g2for the discharge capacity of fixed displacement motor 32, n pbe the output speed of the second transfer device 40, n efor the output speed of driving engine 10.

When the concrete operating mode of concrete pump truck changes, the string revolution speed n that control unit 60 is required under can obtaining current working according to the change of operating mode p, and according to this string revolution speed n pcarry out the discharge capacity V of corresponding regulated variable Hydraulic Pump 31 g1, make when driving engine 10 rotating speed is constant, only by the discharge capacity V of regulated variable Hydraulic Pump 31 g1the action work requirements of concrete pump truck can be met, both decreased the adjustment number of times of driving engine 10, avoid the problem of driving engine 10 rate of load condensate instability, also reduce the problem that the energy charge that brings in driving engine 10 adjustment process is larger.

Although the embodiment in the present invention is illustrated for concrete pump truck, but the work structuring and working process that are only used to more be convenient to the present embodiment is described are described for concrete pump truck here, so that the understanding of those skilled in the art, itself should as to limitation of the present invention.Should see, the present invention has good applicability, and for when needing to be applied to similar system, the present invention all can be suitable for, and also all can play corresponding effect.Here string pump is not limited to above-mentioned several; operating mode does not limit to several operating modes with concrete pump truck yet; for different construction machinery and equipments, as long as its principle applied is identical with the present invention or similar, all can think within protection scope of the present invention.

As shown in Figure 4, according to a second embodiment of the present invention, it is from the different of the first embodiment, and speed setting unit 30 comprises: volume adjustable hydraulic pump 31, be connected to the output shaft of the first transfer device 20, and be hydraulic energy by the changes mechanical energy of the output shaft of the first transfer device 20; Variable-dis-placement motor 33, is connected with volume adjustable hydraulic pump 31 pipeline, and output mechanical energy; The input shaft of the second transfer device 40 is connected to the output shaft of variable-dis-placement motor 33, and control unit 60 is connected to variable-dis-placement motor 33 and volume adjustable hydraulic pump 31 respectively, and the output discharge capacity of control variable motor 33.

In the present embodiment, the string revolution speed adjustment of power distribution system is realized by following formula.

Concrete formula is as follows:

V g 1 V g 3 = n p n e * 1 i 1 i 2

Wherein i 1be the transmitting ratio of the first transfer device 20, i 2be the transmitting ratio of the second transfer device 40, V g1for the discharge capacity of volume adjustable hydraulic pump 31, V g3the discharge capacity of variable-dis-placement motor 33, n pbe the output speed of the second transfer device 40, n efor the output speed of driving engine 10.

Due in the present embodiment, V g1and V g3be all uncertain, therefore can be carried out the discharge capacity V of regulated variable Hydraulic Pump 31 by control unit 60 g1with the discharge capacity V of variable-dis-placement motor 33 g3between ratio, thus realize different transmitting ratios, finally meet string revolution speed n prequirement.

In a unshowned embodiment, also there is a kind of identical speed setting unit 30 uniform with said structure, this speed setting unit 30 comprises: quantitative hydraulic pump, is connected to the output shaft of the first transfer device 20, and is hydraulic energy by the changes mechanical energy of the output shaft of the first transfer device 20; Variable-dis-placement motor 33, is connected with quantitative hydraulic pump pipeline, and output mechanical energy; The input shaft of the second transfer device 40 is connected to the output shaft of variable-dis-placement motor 33, and control unit 60 is connected to variable-dis-placement motor 33 and quantitative hydraulic pump respectively, and the output discharge capacity of control variable motor 33.

It is similar that method for determination of amount is arranged in the output of volume adjustable hydraulic pump 31 in output row's method for determination of amount of the variable-dis-placement motor 33 of the present embodiment and the first embodiment, repeats no more here.

According to embodiments of the invention, concrete pump truck comprises power distribution system, and this power distribution system is above-mentioned power distribution system.

According to embodiments of the invention, construction machinery and equipment comprises power distribution system, and this power distribution system is above-mentioned power distribution system.

As can be seen from the above description, the above embodiments of the present invention achieve following technique effect: power distribution system comprises: driving engine; First transfer device, the first end of the input shaft of the first transfer device is connected to the output shaft of driving engine; Speed setting unit, is connected to the output shaft of the first transfer device, and exports adjustable rotating speed by the output shaft of speed setting unit; Second transfer device, the input shaft of the second transfer device is connected to the output shaft of speed setting unit; Actuating unit, is connected to the output shaft of the second transfer device; And control unit, according to the job information of the driving engine received, actuating unit, control the rotating speed that speed setting unit exports the second transfer device to.Because control unit can determine horsepower output needed for driving engine by the gross horsepower in advance needed for actuating unit, and the rotating speed of horsepower output determination driving engine according to driving engine, therefore, the invariablenes turning speed of driving engine can be made after determining horsepower output needed for driving engine.In the course of the work, if the rotating speed needed for actuating unit changes, can directly be adjusted the rotating speed that driving engine exports by speed setting unit, the rotating speed that speed setting unit is exported meets the need of work of actuating unit, therefore without the need to adjusting the rotating speed of driving engine again, also the problem regulating the engine load instability brought in the process of engine speed is just avoided, decrease the problem that power distribution system energy charge is excessive, extend the service life of driving engine.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (14)

1. a power distribution system, is characterized in that, comprising:
Driving engine (10);
First transfer device (20), the first end of the input shaft of described first transfer device (20) is connected to the output shaft of described driving engine (10);
Speed setting unit (30), is connected to the output shaft of described first transfer device (20), and exports adjustable rotating speed by the output shaft of speed setting unit (30);
Second transfer device (40), the input shaft of described second transfer device (40) is connected to the output shaft of described speed setting unit (30);
Actuating unit (50), is connected to the output shaft of described second transfer device (40); And
Control unit (60), according to the job information of the described driving engine (10) received, described actuating unit (50), controls the rotating speed that described speed setting unit (30) exports described second transfer device (40) to.
2. power distribution system according to claim 1, is characterized in that, described speed setting unit (30) is hydraulic speed regulating device.
3. power distribution system according to claim 2, is characterized in that, described speed setting unit (30) comprising:
Volume adjustable hydraulic pump (31), is connected to the output shaft of described first transfer device (20), and is hydraulic energy by the changes mechanical energy of the output shaft of described first transfer device (20);
Fixed displacement motor (32), is connected with described volume adjustable hydraulic pump (31) pipeline, and output mechanical energy;
The input shaft of described second transfer device (40) is connected to the output shaft of described fixed displacement motor (32), described control unit (60) is connected to described fixed displacement motor (32) and described volume adjustable hydraulic pump (31) respectively, and controls the output discharge capacity of described volume adjustable hydraulic pump (31).
4. power distribution system according to claim 2, is characterized in that, described speed setting unit (30) comprising:
Quantitative hydraulic pump, is connected to the output shaft of described first transfer device (20), and is hydraulic energy by the changes mechanical energy of the output shaft of described first transfer device (20);
Variable-dis-placement motor (33), is connected with described quantitative hydraulic pump pipeline, and output mechanical energy;
The input shaft of described second transfer device (40) is connected to the output shaft of described variable-dis-placement motor (33), described control unit (60) is connected to described variable-dis-placement motor (33) and described quantitative hydraulic pump respectively, and controls the output discharge capacity of described variable-dis-placement motor (33).
5. power distribution system according to claim 2, is characterized in that, described speed setting unit (30) comprising:
Volume adjustable hydraulic pump (31), is connected to the output shaft of described first transfer device (20), and is hydraulic energy by the changes mechanical energy of the output shaft of described first transfer device (20);
Variable-dis-placement motor (33), is connected with described volume adjustable hydraulic pump (31) pipeline, and output mechanical energy;
The input shaft of described second transfer device (40) is connected to the output shaft of described variable-dis-placement motor (33), described control unit (60) is connected to described variable-dis-placement motor (33) and described volume adjustable hydraulic pump (31) respectively, and controls the output discharge capacity of described variable-dis-placement motor (33).
6. power distribution system according to any one of claim 1 to 5, it is characterized in that, described actuating unit (50) comprises the string pump of the output shaft being connected to described second transfer device (40), and described string pump comprises at least two pumps of serial connection mutually, and described at least two pumps are selected from:
Arm-pump (51), controls the load of jib supporting leg;
Main pump (52), controls pumping load;
Constant pressure pump (53), controls to distribute load; And
Gear type pump (54), controls stirring and washing load.
7. power distribution system according to any one of claim 1 to 5, is characterized in that, the second end of the input shaft of described first transfer device (20) is connected to vehicle-bridge system (70).
8. a control method for power distribution system, is characterized in that, comprising:
Speed setting unit (30) is driven the output shaft being connected to driving engine (10);
Actuating unit (50) is driven the output shaft being connected to described speed setting unit (30);
Obtain the output speed of described driving engine (10);
Obtain the rotating speed that described actuating unit (50) is required under current working;
Speed setting unit (30) according to the output speed of the described driving engine (10) got and the speed adjustment of described actuating unit (50), makes the output speed of described speed setting unit (30) and the required rotational speed matches of described actuating unit (50).
9. the control method of power distribution system according to claim 8, is characterized in that,
Described step speed setting unit (30) driving being connected to the output shaft of driving engine (10) comprises:
The output shaft of driving engine (10) is connected to the input shaft of the first transfer device (20), and
The input shaft of described speed setting unit (30) is connected to the output shaft of described first transfer device (20);
Described step actuating unit (50) driving being connected to the output shaft of described speed setting unit (30) comprises:
The output shaft of described speed setting unit (30) is connected to the input shaft of the second transfer device (40), and
The output shaft of described second transfer device (40) is connected to described actuating unit (50).
10. the control method of power distribution system according to claim 9, it is characterized in that, described speed setting unit (30) comprises volume adjustable hydraulic pump (31) and fixed displacement motor (32), hydraulic circuit is formed between described volume adjustable hydraulic pump (31) and described fixed displacement motor (32), the input shaft of described volume adjustable hydraulic pump (31) drives with the output shaft of described first transfer device (20) and is connected, the output shaft of described fixed displacement motor (32) drives with the input shaft of described second transfer device (40) and is connected, speed setting unit (30) described in the output speed of the described driving engine (10) that described basis gets and the speed adjustment of described actuating unit (50), the step of the required rotational speed matches of the output speed of described speed setting unit (30) and described actuating unit (50) being comprised:
The output speed of described fixed displacement motor (32) is determined according to the required rotating speed of described actuating unit (50);
The required discharge capacity of described volume adjustable hydraulic pump (31) is determined according to the discharge capacity of the output speed of described second transfer device (40), the output speed of described driving engine (10) and described fixed displacement motor (32);
Regulate the discharge capacity of described volume adjustable hydraulic pump (31) to described required discharge capacity.
The control method of 11. power distribution systems according to claim 10, is characterized in that, the required discharge capacity of described volume adjustable hydraulic pump (31) obtains by the following method:
V g 1 = n p n e * V g 2 i 1 i 2
Wherein i 1be the transmitting ratio of the first transfer device, i 2be the transmitting ratio of the second transfer device, V g1for variable delivery hydraulic capacity of pump, V g2for the discharge capacity of fixed displacement motor, n pbe the output speed of the second transfer device, n efor the output speed of driving engine.
The control method of 12. power distribution systems according to claim 11, is characterized in that, the output speed of described driving engine (10) is determined according to the bearing power of described power distribution system.
13. 1 kinds of concrete pump trucks, comprise power distribution system, it is characterized in that, the power distribution system of described power distribution system according to any one of claim 1 to 7.
14. 1 kinds of construction machinery and equipments, comprise power distribution system, it is characterized in that, the power distribution system of described power distribution system according to any one of claim 1 to 7.
CN201310414687.9A 2013-09-12 2013-09-12 Power distribution system and control method, concrete pump truck, construction machinery and equipment CN103465784B (en)

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CN105626495B (en) * 2014-11-28 2017-10-27 中联重科股份有限公司 A kind of pumping equipment control method, control device and concrete pumping equipment
CN109109659A (en) * 2018-09-07 2019-01-01 中国铁建重工集团有限公司 Wheeled agricultural machinery and its hydraulic travel system
CN110080532A (en) * 2019-03-19 2019-08-02 北汽福田汽车股份有限公司 Pump truck fluid power system and its control method

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