CN101576738B - Power matching control system for novel energy-saving double-drum vibratory roller - Google Patents
Power matching control system for novel energy-saving double-drum vibratory roller Download PDFInfo
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- CN101576738B CN101576738B CN2009100229429A CN200910022942A CN101576738B CN 101576738 B CN101576738 B CN 101576738B CN 2009100229429 A CN2009100229429 A CN 2009100229429A CN 200910022942 A CN200910022942 A CN 200910022942A CN 101576738 B CN101576738 B CN 101576738B
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Abstract
The invention discloses a power matching control system for a novel energy-saving double-drum vibratory roller. The power matching control system comprises a controller, a travel state control device,a frequency adjusting switch, a compaction/travel selection switch of the travel state and the compaction state of a roller and a speed sensor for detecting the rotate speed of an engine of the roller in real time, wherein a travel pump electromagnetic valve and a travel motor electromagnetic valve are controlled by the controller; a vibratory pump electromagnetic valve is connected with the controller which staggers the power peak values of a travel mechanism hydraulic drive system and a vibratory compaction hydraulic drive system by controlling the starting time of the vibratory pump electromagnetic valve; moreover, when the roller is in compaction work mode, the vibratory pump electromagnetic valve is correspondingly controlled and started by the controller according to a signal detected by the speed sensor. The power matching control system has reasonable design, simple use and operation, reliable performance and good use effect; moreover, the control system can effectively reducethe installed power of the vibratory roller, reduce power consumption and save use cost while reliably restraining the momentary power of the travel system and the vibratory system of the roller.
Description
Technical field
The invention belongs to the field of road engineering machinery technical field, especially relate to a kind of novel energy-conserving double-steel wheeled vibratory roller power matching control system.
Background technology
Double-steel wheeled vibratory roller is the surface layer operation compacting machinary of compacting asphalt, its target to the compacting operation quality requirements than higher.In order to reach qualified compaction quality, the compacting distance in the GB in the regulation dual-steel wheel road roller course of work is a 60-80 rice, and promptly the compacting operation process of double-steel wheeled vibratory roller is the cycling cycling vibration compacting operation.Therefore, dual-steel wheel road roller is the work machine that moves in circles, and wherein starts and the dynamic process that stops has occupied more than 25% of operation T.T., start and docking process in power demand and compression shock amount maximum in the entire job process.Test shows, in the start-up course, it is more than 2 times of normal compacting operation that vibrational system and running gear need maximum general power, in order to satisfy street roller dynamic perfromance demand, all adopts the coupling high-power engine usually.So just directly bring following consequence, bring the lifting of engine capacity coupling on the one hand, impact is excessive in the start-up course on the other hand, and operation quality is defective.
Compacting machinary deadweight usually is all bigger, will inevitably produce very big inertia load in the state change process of the big object of quality, inertia load is excessive can to bring excessive impulsive load to kinematic train again, causes that system dynamic characteristic worsens and the skew oil consumption of engine working point is higher.The excessive method of tradition resolving roller inertia load all is to increase the engine capacity deposit, and the bigger engines of mesh power improve whole dynamic perfromance, avoid operation quality to worsen.But aforesaid way has a large amount of power affluences in the steady operation process, cause unnecessary waste.
Simultaneously, be hybrid power system in the vibroll course of work, running gear and vibrational system start work compound in the course of work when starting simultaneously.Because running gear and vibrational system all are big inertia systems, dual system all needs very big instantaneous power in the start-up course, will propose than higher power requirement engine like this.When engine capacity can not satisfy dual system dynamic process demand, the dynamic perfromance of running gear and vibrational system will variation, the serious problems of operation quality unloading phase of will directly impacting; And because dual system starts simultaneously, form walking starting load peak value and vibrate overlapping of starting load peak value, thereby have to mate powerful engine guaranteeing operate as normal, thus caused great power dissipation, increased the use cost of vibroll greatly.
Drive the drive system that above-mentioned double-steel wheeled vibratory roller carries out vibrating compacting and walking and be respectively vibratory hydraulic system and vibration hydraulic system, wherein vibratory hydraulic system mostly is pump control double motor cascade system, and vibration hydraulic system mostly is pump control double motor parallel system greatly.The pump-control-motor system is a kind of Large-power Driving System, and its system frequency is not high.
Summary of the invention
Technical matters to be solved by this invention is at above-mentioned deficiency of the prior art, a kind of novel energy-conserving double-steel wheeled vibratory roller power matching control system is provided, it is reasonable in design, use is easy and simple to handle and dependable performance, result of use are good, in walking of reliable inhibition street roller and vibrational system instantaneous power, also can effectively reduce the installed power of vibroll, reduce power consumption, save use cost.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of novel energy-conserving double-steel wheeled vibratory roller power matching control system is characterized in that: comprise controller, the walking states control device that the speed of travel and the forward-reverse direction of double-steel wheeled vibratory roller are controlled adjustment, frequency of operation during to the compacting operation of double-steel wheeled vibratory roller is controlled the frequency of adjustment and is adjusted switch, be used to select the compacting/walking selector switch and the real-time speed pickup that the engine speed of described double-steel wheeled vibratory roller is detected of double-steel wheeled vibratory roller walking states and compaction state; Described walking states control device, frequency adjust switch and compacting/walking selector switch all connects controller; The traveling pump solenoid valve and the running motor solenoid valve that the travel mechanism fluid power system of described double-steel wheeled vibratory roller are carried out start and stop and the control of drive amount size all join with controller, and the two is controlled by controller; The vibratory pump solenoid valve that the vibrating compacting fluid power system of described double-steel wheeled vibratory roller is carried out start and stop control with join by controlling the controller of realizing its start-up time described travel mechanism fluid power system and two dynamic system power peak values of vibrating compacting fluid power system stagger mutually, and when compacting/walking selector switch selection compacting mode of operation the vibratory pump solenoid valve corresponding control starts according to the rate signal that speed pickup detected by controller.
The in-line of described traveling pump solenoid valve is provided with one or more in order to restriction before the valve of corresponding increase system damping.
The vent line of described traveling pump solenoid valve is provided with one or more in order to restriction behind the valve of corresponding increase system damping.
Also comprise the display unit that joins with controller.
The walking states joystick of described walking states control device for described travel mechanism fluid power system is controlled, the walking states joystick links to each other with described travel mechanism fluid power system by gear train.
It is the high-frequency/low-frequency selector switch that described frequency is adjusted switch.
The present invention compared with prior art has the following advantages:
1, novel in design, reasonable and intelligent degree height uses easy and simple to handle.
The instantaneous power that 2, can effectively suppress the double-steel wheeled vibratory roller vibration hydraulic system: because the vibration hydraulic system (the organization hydraulic pressure drive system of promptly walking) of double-steel wheeled vibratory roller mostly is pump control double motor parallel system greatly; And the pump-control-motor system is a kind of Large-power Driving System, its system frequency is not high, total system is controlled to be the little closed-loop control of pumping rate, add the control mode of pump-control-motor system again, thereby, reduce to respond overshoot in order to suppress the stability that instantaneous power will improve system, also to satisfy the rapidity of system simultaneously, this just requires appropriateness to increase system damping, can not reduce the frequency of system simultaneously.Consider that the pump-control-motor loop is system's major loop, any adjusting is very big to the influence of system power transmission characteristic, therefore the damping characteristic of the little closed loop of regulated variable pump, the Comprehensive Control performance of improving whole transmission link are exactly the most effective and the control method of suitable dual-steel wheel road roller.Correspondingly, the present invention has adopted at the variable output pump solenoid valve and has been the porch of traveling pump solenoid valve or adds suitable damping simultaneously in the exit, to change the variable output pump characteristic, the mode of control total system characteristic suppresses system's instantaneous power, has also guaranteed the corresponding rapidity of system simultaneously.Particularly, the present invention is mainly according to the match condition of hydraulic pump and oil motor, under the situation that satisfies the street roller starting characteristic, size according to mass load, choose suitable restriction at traveling pump solenoid valve in-line or while at vent line, reach obvious inhibition inertia impact load, reduce the purpose of hydraulic system instantaneous power demands, thereby can effectively reduce in the start-up course pressure to the power demand of engine, reduce the mesh power of engine, make engine satisfy the output power of travel mechanism to the engine requirement, moment of torsion also has under the condition of suitable surplus, reduces installed power, allows hydraulic pump works in efficient district simultaneously, improve the efficient of hydraulic system, reduce fuel consumption, improve the complete machine mechanical efficiency, reduce noise, reduce mechanical wear simultaneously, improve machine serviceable life.
3, because double-steel wheeled vibratory roller adopts the hybrid power system of vibration hydraulic system and vibratory hydraulic system, its start-up course power demand is a change procedure, power demand has a peak value, the two system peak power that stagger are just necessary, the present invention adopts double dynamical start-up control system, specifically be the peak power critical point that velocity variations situation (determining vibration hydraulic system peak load point according to the engine speed amplitude of variation) by test engine is determined vibration hydraulic system, the start-up course of mating vibratory hydraulic system then.Particularly, start-up control of the present invention is exactly to judge the start-up time of vibrational system by the commentaries on classics degree of monitoring engine, thereby avoids the peak power stack of two systems.This mode can make vibrational system and running gear all satisfy rapidity and stationarity requirement, power peak between above-mentioned two systems simultaneously staggers, further reduce the power demand of start-up course to engine, in the control procedure, controller can be judged the Best Times of starting of oscillation according to program setting, thereby the power peak of starting of effectively staggering (hydraulic system of promptly walking start-up course) and starting of oscillation (being the vibratory hydraulic system start-up course), reduce power demand to engine, save the energy.
4, intelligent degree height uses easy and simple to handlely, and in the control procedure, controller is controlled the starting of oscillation of vibroll automatically, no longer needs the driver to intervene, and has simplified operation, has reduced driver's working strength.
5, starting power control system of the present invention can effectively suppress the appearance of maximum inertia force in the dual-steel wheel road roller start-up course, obviously improves the phenomenon that compacting starting link material is passed, and improves compaction quality.
6, the present invention can obviously reduce the engine capacity coupling, and fuel saving consumption effectively reduces discharging.
In sum, the present invention is reasonable in design, use is easy and simple to handle and dependable performance, result of use are good, in walking of reliable inhibition street roller and vibrational system instantaneous power, also can be according to the compacting operation demand, automatically judge the starting of oscillation time by controller, avoid the power peak of dual system (hydraulic system of promptly walking and vibratory hydraulic system) and join, reach the installed power of effective reduction vibroll, reduce the purpose of power consumption, saving use cost.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is a circuit block diagram of the present invention.
Fig. 2 is a control flow block diagram of the present invention.
Fig. 3 is the hydraulic schematic diagram of the fluid power system of restriction of the present invention.
Fig. 4 uses the power characteristic comparison diagram of front and back double-steel wheeled vibratory roller for the fluid power system of band restriction.
Fig. 5 uses the part throttle characteristics comparison diagram of front and back double-steel wheeled vibratory roller for the present invention.
Fig. 6 uses the power characteristic comparison diagram of front and back double-steel wheeled vibratory roller for the present invention.
Description of reference numerals:
The 1-controller; 2-walking states joystick; 3-compacting/walking selector switch;
4-running motor solenoid valve; 5-vibratory pump solenoid valve; 6-traveling pump solenoid valve;
The 7-speed pickup; The 8-display unit; 9-high-frequency/low-frequency selector switch;
Restriction before the 10-valve; Restriction behind the 11-valve; The 12-traveling pump;
The 13-running motor; The 15-surplus valve; The 16-flushing valve;
The 17-slippage pump; 18-repairing surplus valve.
Embodiment
As shown in Figure 1, the present invention includes controller 1, the walking states control device that the speed of travel and the forward-reverse direction of double-steel wheeled vibratory roller are controlled adjustment, the frequency of operation during to the compacting operation of double-steel wheeled vibratory roller and control compacting/walking selector switch 3 and the real-time speed pickup 7 that the engine speed of described double-steel wheeled vibratory roller is detected that the frequency of adjustment is adjusted switch, is used to select double-steel wheeled vibratory roller walking states and compaction state.Described walking states control device, frequency adjust switch and compacting/walking selector switch 3 all connects controller 1.In addition, the present invention also comprises the display unit 8 that joins with controller 1.
The traveling pump solenoid valve 6 and the running motor solenoid valve 4 that the travel mechanism fluid power system of described double-steel wheeled vibratory roller are carried out start and stop and the control of drive amount size all join with controller 1, and the two is controlled by controller 1.The vibratory pump solenoid valve 5 that the vibrating compacting fluid power system of described double-steel wheeled vibratory roller is carried out start and stop control with join by controlling the controller of realizing its start-up time described travel mechanism fluid power system and two dynamic system power peak values of vibrating compacting fluid power system stagger mutually 1, and vibratory pump solenoid valve 5 is started according to the corresponding control of rate signal that speed pickup 7 is detected by controller 1 when compacting/walking selector switch 3 selection compacting mode of operations.
In the present embodiment, the in-line of described traveling pump solenoid valve 6 and vibratory pump solenoid valve 5 is provided with a restriction.The walking states joystick 2 of described walking states control device for described travel mechanism fluid power system is controlled, walking states joystick 2 links to each other with described travel mechanism fluid power system by gear train.It is high-frequency/low-frequency selector switch 9 that described frequency is adjusted switch.Particularly, described compacting/walking selector switch 3, walking states joystick 2, high-frequency/low-frequency selector switch 9 and speed pickup 7 join with the corresponding input end of controller 1 respectively, and traveling pump solenoid valve 6, running motor solenoid valve 4 and vibratory pump solenoid valve 5 join with the corresponding output terminal of controller 1 respectively.
In conjunction with Fig. 2, the course of work of the present invention is: before the operation, at first set a speed of travel threshold value for described vibratory hydraulic system startup judgement by controller 1, above-mentioned speed of travel threshold value is and the corresponding speed of travel of peak power critical point of vibration hydraulic system that controller 1 is by the whole starting process of user's input instruction control double-steel wheeled vibratory roller afterwards.
When the driver is " compacting " by the mode of operation that compacting/walking selector switch 3 is selected, frequency of operation when selecting the double-steel wheeled vibratory roller compacting operation by high-frequency/low-frequency selector switch 9 earlier, starting the walking fluid power system simultaneously walks forward to order about double-steel wheeled vibratory roller, before the walking fluid power system starts, select the speed of travel and the direction of travel of double-steel wheeled vibratory roller earlier by walking states joystick 2, controller 1 is corresponding to send steering order according to corresponding traveling pump solenoid valve 6 and the running motor solenoid valve 4 given of walking states joystick 2 selected above-mentioned parameters, the walking of control double-steel wheeled vibratory roller; And the startup of vibratory pump solenoid valve 5 is controlled according to the threshold engine speed that sets automatically by controller 1, particularly: in the walking process of double-steel wheeled vibratory roller, speed pickup 7 real-time rotating speeds to engine detect and the signal Synchronization that is detected are sent to controller 1, controller 1 compares engine rotational speed signal and the preceding engine speed value of once surveying that speed pickup 7 imports in real time, Vibration on Start-up pump when the engine speed value that is detected no longer reduces, promptly make vibratory pump solenoid valve 5 switch on, otherwise Vibration on Start-up pump not, can guarantee effectively that like this vibratory hydraulic system started in the moment of the best, thereby reach the power peak of effectively stagger walking and vibration two systems, reduce purpose the power demand of engine.In sum, when the mode of operation of driver's selection is " compacting ", the speed of travel that controller 1 is at first set according to the driver sends steering order for traveling pump solenoid valve 6 and running motor solenoid valve 4, make the discharge capacity of traveling pump and running motor meet the requirement of travel speed, start the double-steel wheeled vibratory roller walking; Controller 1 compares the real-time engine speed of street roller of speed pickup 7 inputs and the preceding engine speed value of once preserving simultaneously, when the practical engine speeds that is detected no longer reduces, controller 1 sends steering order to vibratory pump solenoid valve 5 again, starts the double-steel wheeled vibratory roller vibration.
When the driver is " walking " by the mode of operation that compacting/walking selector switch 3 is selected, 1 speed of travel of setting by walking states joystick 2 according to the driver of controller, send steering order for traveling pump solenoid valve 6 and running motor solenoid valve 4, make the discharge capacity of traveling pump and running motor meet the requirement of the speed of travel, to start the double-steel wheeled vibratory roller walking.
In conjunction with Fig. 3, described travel mechanism fluid power system comprises that specifically the hydraulic pump that drives the street roller walking is a traveling pump 12, join with the oil inlet and outlet of traveling pump 12 respectively and two oil motors the respectively front and back wheel of described double-steel wheeled vibratory roller being driven are walked motor 13 at once by fluid pressure line, described double-steel wheeled vibratory roller advance or fallback procedures in tackle two surplus valves 15 that oil liquid pressure in traveling pump 12 and 13 hydraulic tube roads of running motor is controlled adjustment mutually, the traveling pump solenoid valve 6 that the start and stop and the displacement size of traveling pump 12 are controlled, and traveling pump 12 joins and traveling pump solenoid valve 6 and the retaining valve by surplus valve 15 are carried out the slippage pump 17 of fuel feeding respectively to the hydraulic circuit of 13 of traveling pump 12 and running motors and be connected on flushing valve 16 on the running motor 13.Described traveling pump 12 is a variable output pump, running motor 13 is a variable displacement motor, described two surplus valves 15 are connected in the fluid pressure line of 13 of traveling pump 12 and running motors, all join by the fluid pressure line that repairing surplus valve 18 is housed between the oil-in of described slippage pump 17 and traveling pump solenoid valve 6 and surplus valve 15, two oil-outs of traveling pump solenoid valve 6 all join with the valve control oil cylinder of traveling pump 12 by fluid pressure line and described two oil-outs join with the overflow hydraulic fluid port of two surplus valves 15 respectively by fluid pressure line.In the present embodiment, on the fluid pressure line that the in-line of described traveling pump solenoid valve 6 promptly joins with the oil-in of traveling pump solenoid valve 6, have one or more in order to restriction 10 before the valve of corresponding increase system damping.Simultaneously, on two fluid pressure lines that the vent line of described traveling pump solenoid valve 6 promptly joins with two oil-outs of traveling pump solenoid valve 6 respectively, have one or more in order to restriction 11 behind the valve of corresponding increase system damping.
Simultaneously, because the used traveling pump 12 of vibration hydraulic system is a variable output pump, corresponding on variable output pump in-line or in-line and vent line, add a damping hole simultaneously and be valve before behind the restriction 10, increase a damping just for the little closed-loop control system of variable output pump servo-cylinder, reach the input characteristics that changes the variable output pump response characteristic, change the pump-control-motor system then, improve the frequency characteristic of pump-control-motor and effectively suppress the impact load of start-up course and start the purpose of required instantaneous power.
In the actual processing and making process, can tackle before the valve behind the restriction 10 and valve the quantity and the size of restriction 11 according to actual needs mutually and adjust.The size of restriction 11 and the selection and the combination of installation site behind preceding restriction 10 of described valve and the valve, it is fixed that the response characteristic that can require according to the size and the hydraulic system of actual mass load that double-steel wheeled vibratory roller bears is come.Generally speaking: for baby roller, inertial mass is smaller, mass load is not very serious, thereby will fully take into account the response characteristic of machine, restriction 10 gets final product before only adding a valve, and the size of restriction 10 is selected according to the actual acceleration requirement of street roller before the valve, when the acceleration requirement is big more, restriction 10 is big more before the valve, otherwise more little; For medium-sized street roller, mass load is more serious, this moment, street roller not only will be considered the dynamic perfromance of machine, also to consider economy and reliability in the start-up course, should choose restriction 10 before the less valve this moment, perhaps choose before two bigger slightly valves restrictions 10 and valve after restriction 11 be complementary; For large roller, mass load is more serious, the dynamic perfromance of street roller will be a primary goal with reliability and operation quality this moment, the appropriate preferential treatment dynamic property, thereby must adopt binodal discharge orifice pattern promptly to adopt to be provided with simultaneously before the valve mode of restriction 11 behind the restriction 10 and valve, simultaneously before the valve behind restriction 10 and the valve size parameter of restriction 11 calculate and will require carry out in conjunction with machine characteristic.To sum up, among the present invention, the travel mechanism fluid power system that described double-steel wheeled vibratory roller adopted is the fluid power system of band restriction.Find out that in conjunction with Fig. 4, Fig. 5 the fluid power system of band restriction can effectively suppress the instantaneous inertia impact load in the double-steel wheeled vibratory roller start-up course, and can significantly reduce the instantaneous power demands of double-steel wheeled vibratory roller.Can find out in conjunction with Fig. 6, the travel mechanism fluid power system of double-steel wheeled vibratory roller adopts the fluid power system of restriction, and after adopting the controller of realizing two dynamic system power peak values of described travel mechanism fluid power system and vibrating compacting fluid power system are staggered mutually by the start-up time of control vibratory pump solenoid valve 51, can significantly effectively reduce the power match of double-steel wheeled vibratory roller.
In addition, in the double-steel wheeled vibratory roller course of work, the display unit 8 that joins with controller 1 intuitively shows information such as the speed of travel of current double-steel wheeled vibratory roller and vibration frequency, in real time so that the driver accurately understands the duty of double-steel wheeled vibratory roller.
The above; it only is preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, everyly any simple modification that above embodiment did, change and equivalent structure changed, all still belong in the protection domain of technical solution of the present invention according to the technology of the present invention essence.
Claims (6)
1. a novel energy-conserving double-steel wheeled vibratory roller power matching control system is characterized in that: comprise controller (1), the walking states control device that the speed of travel and the forward-reverse direction of double-steel wheeled vibratory roller are controlled adjustment, frequency of operation during to the compacting operation of double-steel wheeled vibratory roller is controlled the frequency of adjustment and is adjusted switch, be used to select the compacting/walking selector switch (3) and the real-time speed pickup (7) that the engine speed of described double-steel wheeled vibratory roller is detected of double-steel wheeled vibratory roller walking states and compaction state; Described walking states control device, frequency adjust switch and compacting/walking selector switch (3) all connects controller (1); The traveling pump solenoid valve (6) and the running motor solenoid valve (4) that the travel mechanism fluid power system of described double-steel wheeled vibratory roller are carried out start and stop and the control of drive amount size all join with controller (1), and the two is controlled by controller (1); The vibratory pump solenoid valve (5) that the vibrating compacting fluid power system of described double-steel wheeled vibratory roller is carried out start and stop control with by controlling its realization start-up time the controller (1) that described travel mechanism fluid power system and two dynamic system power peak values of vibrating compacting fluid power system stagger is mutually joined, and vibratory pump solenoid valve (5) is started according to the corresponding control of rate signal that speed pickup (7) is detected by controller (1) when compacting/walking selector switch (3) is selected the compacting mode of operation, the real-time rotating speed to engine of speed pickup (7) detects and the signal Synchronization that is detected is sent to controller (1), controller (1) compares Vibration on Start-up pump when the engine speed value that is detected no longer reduces with engine rotational speed signal and the preceding engine speed value of once surveying that speed pickup (7) imports in real time.
2. according to the described a kind of novel energy-conserving double-steel wheeled vibratory roller power matching control system of claim 1, it is characterized in that: the in-line of described traveling pump solenoid valve (6) is provided with one or more in order to restriction (10) before the valve of corresponding increase system damping.
3. according to the described a kind of novel energy-conserving double-steel wheeled vibratory roller power matching control system of claim 2, it is characterized in that: the vent line of described traveling pump solenoid valve (6) is provided with one or more in order to restriction (11) behind the valve of corresponding increase system damping.
4. according to claim 1,2 or 3 described a kind of novel energy-conserving double-steel wheeled vibratory roller power matching control systems, it is characterized in that: also comprise the display unit (8) that joins with controller (1).
5. according to claim 1 or 2 described a kind of novel energy-conserving double-steel wheeled vibratory roller power matching control systems, it is characterized in that: the walking states joystick (2) of described walking states control device for described travel mechanism fluid power system is controlled, walking states joystick (2) links to each other with described travel mechanism fluid power system by gear train.
6. according to claim 1 or 2 described a kind of novel energy-conserving double-steel wheeled vibratory roller power matching control systems, it is characterized in that: it is high-frequency/low-frequency selector switch (9) that described frequency is adjusted switch.
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| CN2009100229429A CN101576738B (en) | 2009-06-15 | 2009-06-15 | Power matching control system for novel energy-saving double-drum vibratory roller |
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| CN101182702A (en) * | 2007-12-18 | 2008-05-21 | 三一重工股份有限公司 | Tire road roller energy-saving control system |
-
2009
- 2009-06-15 CN CN2009100229429A patent/CN101576738B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2730925Y (en) * | 2004-06-04 | 2005-10-05 | 中外建发展股份有限公司 | Transmission device for hydraulic driven road roller |
| CN2878469Y (en) * | 2005-04-07 | 2007-03-14 | 徐州工程机械科技股份有限公司徐工研究院 | Stepless adjustable automatic control system for vibration of intelligent road presser |
| CN101182702A (en) * | 2007-12-18 | 2008-05-21 | 三一重工股份有限公司 | Tire road roller energy-saving control system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778640A (en) * | 2019-03-28 | 2019-05-21 | 山东临工工程机械有限公司 | A kind of vibration control system and road roller |
| CN109914199A (en) * | 2019-03-28 | 2019-06-21 | 山东临工工程机械有限公司 | A kind of vibration control system and road roller |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101576738A (en) | 2009-11-11 |
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