CN110258262B - Vibratory roller and vibratory roller control method - Google Patents
Vibratory roller and vibratory roller control method Download PDFInfo
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- CN110258262B CN110258262B CN201910561125.4A CN201910561125A CN110258262B CN 110258262 B CN110258262 B CN 110258262B CN 201910561125 A CN201910561125 A CN 201910561125A CN 110258262 B CN110258262 B CN 110258262B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
- E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
- E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
- E01C19/286—Vibration or impact-imparting means; Arrangement, mounting or adjustment thereof; Construction or mounting of the rolling elements, transmission or drive thereto, e.g. to vibrator mounted inside the roll
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- Road Paving Machines (AREA)
Abstract
The invention belongs to the technical field of road rollers, and discloses a vibratory roller and a vibratory roller control method. This vibratory roller includes the steel wheel and sets up at the inside vibrating motor of steel wheel, still is provided with in the inside of steel wheel: the transmission shaft is connected to the output end of the vibration motor, and a first oil duct and a second oil duct are formed in the transmission shaft; the vibration oil cylinder comprises a cylinder body sleeved on the transmission shaft and a piston arranged in the cylinder body in a sliding mode, the piston can divide the cylinder body into an upper cavity and a lower cavity, the first oil duct is communicated with the upper cavity, and the second oil duct is communicated with the lower cavity. The vibration motor can drive the vibration oil cylinder to rotate through the transmission shaft, and the centrifugal force of the transmission shaft is adjusted by adjusting the position of the piston relative to the cylinder body, so that the exciting force of the steel wheel is adjustable. The size of the exciting force of the vibratory roller can be accurately set according to the material to be compacted, and the compactness and the flatness of the vibratory roller are guaranteed.
Description
Technical Field
The invention relates to the technical field of road rollers, in particular to a vibratory roller and a control method of the vibratory roller.
Background
The vibratory roller is one of the important compaction equipments for road surface engineering machinery construction, and is mainly used for compacting various broken stones, soil, concrete, asphalt and other different road beds or road surfaces.
The conventional vibratory roller comprises a vibratory steel wheel and an eccentric mechanism, wherein the vibratory steel wheel is used for rolling on a road surface to be compacted and is a core working component of the vibratory roller. The eccentric mechanism is arranged in the vibrating steel wheel and comprises a vibrating motor, an eccentric shaft and an eccentric cam, the vibrating motor drives the eccentric shaft through a spline and drives an eccentric cam block to rotate at a high speed to generate a large centrifugal force, under the action of the centrifugal force, the vibrating steel wheel contacts with a pavement material to be compacted to generate excitation vibration, the vibrating steel wheel applies repeated impact force to the pavement material to be compacted, the pavement material to be compacted generates vibration and compaction, so that a loose roadbed and the pavement material are gathered in a short time, and the material density is improved.
The conventional vibrating road roller has the defects that the rotating phase between the vibrating motor and the eccentric shaft is difficult to accurately adjust, and the eccentric cam can quickly obtain two different exciting forces of different heights only by controlling the forward rotation and the reverse rotation of the vibrating motor. For compaction of roadbeds and pavements made of different materials, road rollers with different tonnages are generally selected according to experience to meet the amplitude requirement, so that the magnitude of the exciting force cannot be accurately set according to the material to be compacted, and the phenomenon of over-pressing or segregation is easy to occur in the rolling working process, thereby resulting in poor compaction degree and flatness of the compacted surface of the pavement. In addition, the road roller usually works in a construction site with poor environment, and the road roller often breaks down due to poor construction environment and long continuous operation time. The traditional road roller mainly depends on detection instruments and experiences, the fault analysis response and processing time is slow, the operation time is delayed, and the production efficiency is influenced.
Disclosure of Invention
The invention aims to provide a vibratory roller and a vibratory roller control method, which can adjust the magnitude of an exciting force according to different materials to be compacted.
In order to achieve the purpose, the invention adopts the following technical scheme:
a vibratory roller, includes the steel wheel and sets up the inside vibrating motor of steel wheel still be provided with in the inside of steel wheel:
the transmission shaft is connected to the output end of the vibration motor, and a first oil duct and a second oil duct are formed in the transmission shaft;
the vibration oil cylinder comprises a cylinder body sleeved on the transmission shaft and a piston arranged in the cylinder body in a sliding mode, the piston can divide the cylinder body into an upper cavity and a lower cavity, the first oil duct is communicated with the upper cavity, and the second oil duct is communicated with the lower cavity;
the vibration motor can drive the vibration oil cylinder to rotate through the transmission shaft, and the position of the piston relative to the cylinder body is adjusted to adjust the centrifugal force of the transmission shaft, so that the excitation force of the steel wheel can be adjusted.
Preferably, the hydraulic oil supply device further comprises an oil supply assembly, wherein the oil supply assembly is arranged inside the steel wheel and connected to the transmission shaft, and the oil supply assembly is communicated with the first oil channel and the second oil channel respectively and used for conveying hydraulic oil.
Preferably, the oil supply assembly comprises an oil supply support, an oil inlet pipe, an oil return pipe and a rotary joint connected to the transmission shaft, one end of the oil supply support and the steel wheel are rotatably arranged, the other end of the oil supply support is used for fixing the oil inlet pipe and the oil return pipe, the oil inlet pipe is communicated with the first oil duct through the rotary joint, and the oil return pipe is communicated with the second oil duct through the rotary joint.
Preferably, the rotary joint comprises a shell, a rotating shaft and a rotary bearing, the rotary bearing is arranged between the shell and the rotating shaft, the rotating shaft can rotate relative to the shell, one end of the rotating shaft is connected to the transmission shaft, the other end of the rotating shaft penetrates through the shell, a first communicating oil channel and a second communicating oil channel are formed in the rotating shaft, the oil inlet pipe is communicated with the first oil channel through the first communicating oil channel, and the second oil channel is communicated with the oil return pipe through the second communicating oil channel.
Preferably, the hydraulic system further comprises a stepless amplitude modulation hydraulic system, the stepless amplitude modulation hydraulic system comprises an amplitude modulation pump and an amplitude modulation solenoid valve assembly, the amplitude modulation pump conveys hydraulic oil into the rotary joint through the amplitude modulation solenoid valve assembly, and a bidirectional hydraulic lock is arranged between the rotary joint and the vibration oil cylinder and used for locking the position of the piston relative to the cylinder body.
Preferably, the hydraulic system further comprises a stepless frequency-modulation hydraulic system, wherein the stepless frequency-modulation hydraulic system comprises a frequency-modulation vibration pump, and the frequency-modulation vibration pump is used for adjusting the rotating speed of the vibration motor.
Preferably, the vibration motor comprises a plunger variable motor, an electromagnetic directional valve and a frequency modulation servo oil cylinder which are communicated with each other, hydraulic oil can enter the frequency modulation servo oil cylinder through the electromagnetic directional valve and push a sliding block in the frequency modulation servo oil cylinder to move, and the sliding block is connected with a swash plate of the plunger variable motor through a connecting rod and used for adjusting the swing angle of the swash plate.
To achieve the purpose, the invention further provides a vibratory roller control method, which is used for controlling the vibratory roller, and the vibratory roller control method comprises the following steps:
according to the compactness of the pavement material to be compacted, the stepless amplitude modulation process of the steel wheel is realized by adjusting the position of a piston in a vibration oil cylinder, and the stepless frequency modulation process of the steel wheel is realized by adjusting the rotating speed of a vibration motor.
Preferably, the method for controlling the vibratory roller comprises an automatic adjustment mode, wherein the automatic adjustment mode comprises the following steps: and acquiring actual working condition parameters, when the actual working condition parameters cannot meet the range of the preset working condition parameters, calculating and reading working condition parameters close to the actual working conditions in the database, and carrying out corresponding correction on the basis of the working condition parameters to form a correction, and then starting the automatic amplitude modulation system and the automatic frequency modulation system.
Preferably, the method for controlling the vibratory roller further comprises a manual adjustment mode, wherein the manual adjustment mode comprises the following steps: after the user manually inputs the vibration parameters, stepless amplitude modulation and stepless frequency modulation are carried out according to the vibration parameters.
The invention has the beneficial effects that:
according to the vibratory roller provided by the invention, hydraulic oil is conveyed into the upper cavity of the vibratory cylinder through the first oil duct, the hydraulic oil flows into the lower cavity of the vibratory cylinder along a gap between the piston and the cylinder body, and the hydraulic oil in the lower cavity flows back into the second oil duct.
If the piston is positioned at the top dead center of the cylinder body, namely the position closest to the transmission shaft, the minimum centrifugal force exists; the maximum centrifugal force is present if the piston is located at the bottom dead center of the cylinder, i.e., the position farthest from the drive shaft. According to different materials to be compacted, different eccentric moments are generated by controlling the oil amount flowing into the vibration oil cylinder from the oil duct, and the centrifugal force of the transmission shaft is adjusted. By adopting the mode, compared with the prior art, the size of the exciting force can be accurately set according to the material to be compacted, and the phenomenon of overpressure or segregation in the rolling working process is reduced, so that the compaction degree and the flatness of the compacted surface of the pavement are ensured. Meanwhile, compared with the prior art, the requirement of the amplitude of the road roller can be met without selecting the tonnage of the vibratory roller according to experience, the artificial subjective influence is reduced, the universality of the vibratory roller is realized, and the accuracy of the selection of the exciting force is also ensured.
According to the control method of the vibratory roller, the excitation force is adjusted through stepless amplitude modulation and stepless frequency modulation according to the compactness of different materials to be compacted, so that the compactness and the flatness of the compacted surface of the pavement are guaranteed.
Drawings
Fig. 1 is a schematic view of the construction of a vibratory roller according to the invention;
FIG. 2 is a hydraulic schematic of a hydraulic system for stepless amplitude modulation in the vibratory roller of the present invention;
FIG. 3 is a hydraulic schematic diagram of a stepless frequency modulation hydraulic system in the vibratory roller of the present invention;
fig. 4 is a schematic view of a control structure of the vibratory roller of the invention;
fig. 5 is a flow chart of a vibratory roller control method of the present invention.
In the figure:
1. a steel wheel; 2. a vibration motor; 3. a drive shaft; 4. a vibration oil cylinder; 5. an oil supply assembly; 6. a stepless amplitude modulation hydraulic system; 7. a stepless frequency modulation hydraulic system; 8. a shock absorber; 9. a compactness sensor;
11. a first bearing housing; 12. a cover plate; 13. a base plate; 14. a double-row tapered roller bearing; 15. an outer bearing seat; 16. an inner bearing seat; 17. a self-aligning ball bearing;
21. a plunger variable displacement motor; 22. an electromagnetic directional valve; 23. a frequency modulation servo oil cylinder; 24. a flush valve; 25. an overflow valve;
41. a piston; 51. an oil supply bracket; 52. an oil inlet pipe; 53. an oil return pipe; 54. a rotary joint; 541. A housing; 542. a rotating shaft;
61. an amplitude-modulated pump; 62. an amplitude modulated solenoid valve assembly; 63. a bidirectional hydraulic lock; 64. a flow dividing throttle valve;
621. a first amplitude modulated solenoid valve; 622. a second amplitude modulated solenoid valve;
71. a frequency modulated vibration pump; 72. a filter;
711. an oil replenishing pump; 712. a first frequency modulation solenoid valve; 713. a second frequency modulation solenoid valve; 714. a first frequency modulation servo cylinder; 715. a frequency modulation reversing valve; 716. a second frequency modulation servo oil cylinder; 717. a plunger variable pump.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The conventional vibrating road roller has the defects that the rotating phase between the vibrating motor and the eccentric shaft is difficult to accurately adjust, and the eccentric cam can quickly obtain two different exciting forces of different heights only by controlling the forward rotation and the reverse rotation of the vibrating motor. For compaction of roadbeds and pavements made of different materials, road rollers with different tonnages are generally selected according to experience to meet the amplitude requirement, so that the magnitude of the exciting force cannot be accurately set according to the material to be compacted, and the phenomenon of over-pressing or segregation is easy to occur in the rolling working process, thereby resulting in poor compaction degree and flatness of the compacted surface of the pavement.
Fig. 1 is a schematic view of the construction of a vibratory roller according to the invention. The present embodiments provide a vibratory roller for adjusting the excitation force of the roller. As shown in fig. 1, the vibratory roller comprises a steel wheel 1, wherein the steel wheel 1 is of a hollow cylindrical structure, and the steel wheel 1 is used for rolling road surface materials to be compacted. Be provided with vibrating motor 2, transmission shaft 3 and vibration cylinder 4 in the inside of steel wheel 1, vibrating motor 2 has played the effect of fixed support through motor fixing base setting on steel wheel 1, and vibrating motor 2's output is connected in transmission shaft 3, has seted up first oil duct and second oil duct in transmission shaft 3, and first oil duct is used for supplying with hydraulic oil, and the second oil duct is used for the backward flow of hydraulic oil. Vibrating motor 2 can drive transmission shaft 3 rotatoryly, along with the rotation of transmission shaft 3, can drive vibrating cylinder 4's rotation, vibrating cylinder 4 can realize eccentric effect and realize through letting in hydraulic oil to its inside, wherein vibrating cylinder 4 specifically is no pole vibrating cylinder 4, vibrating cylinder 4 specifically includes cylinder body and piston 41, the transmission shaft 3 is located to the cylinder body cover, piston 41 slides and sets up inside the cylinder body, piston 41 can be cut apart into upper chamber and lower chamber with the cylinder body, the oil duct communicates in the upper chamber, first oil duct communicates in the upper chamber, the second oil duct communicates in lower chamber.
After the hydraulic oil flows into the upper cavity through the oil passage, the hydraulic oil pushes the piston 41 to slide along the inside of the cylinder body, and the position of the piston 41 relative to the cylinder body is adjusted by controlling the oil amount introduced into the upper cavity from the first oil passage and the oil amount returned to the lower cavity from the lower cavity to adjust the centrifugal force of the transmission shaft 3, so that different centrifugal forces are obtained, and the excitation force of the steel wheel 1 is adjustable.
According to the vibratory roller provided by the embodiment, hydraulic oil is conveyed into the upper cavity of the vibratory cylinder 4 through the first oil duct, the hydraulic oil flows into the lower cavity of the vibratory cylinder 4 along a gap between the piston 41 and the cylinder body, the hydraulic oil in the lower cavity flows back into the second oil duct, in the process, the vibratory motor 2 drives the vibratory cylinder 4 to rotate at a high speed through the transmission shaft 3, as the vibratory cylinder 4 is filled with the hydraulic oil, the position of the piston 41 relative to the cylinder body is equivalent to the eccentric action of the eccentric bump, a large centrifugal force is generated, and under the action of the centrifugal force, the steel wheel 1 is contacted with a pavement material to be compacted and then exerts repeated impact force to generate excitation, so that the pavement material to be compacted is vibrated and compacted.
If the piston 41 is located at the top dead center of the cylinder, i.e., the position closest to the drive shaft 3, there is the smallest centrifugal force at this time; if the piston 41 is located at the bottom dead center of the cylinder, i.e., the farthest position from the drive shaft 3, there is the maximum centrifugal force at this time. According to different materials to be compacted, different eccentric moments are generated by controlling the oil amount flowing into the vibration oil cylinder 4 from the oil duct, and the centrifugal force of the transmission shaft 3 is adjusted. By adopting the mode, compared with the prior art, the size of the exciting force can be accurately set according to the material to be compacted, and the phenomenon of overpressure or segregation in the rolling working process is reduced, so that the compaction degree and the flatness of the compacted surface of the pavement are ensured. Meanwhile, compared with the prior art, the requirement of the amplitude of the road roller can be met without selecting the tonnage of the vibratory roller according to experience, the artificial subjective influence is reduced, the universality of the vibratory roller is realized, and the accuracy of the selection of the exciting force is also ensured.
Because steel wheel 1 is shell structure, in order to guarantee the support of each spare part, as shown in fig. 1, be provided with two parallel interval's first riser and second riser in the inside of steel wheel 1, first riser and second riser are cut apart the inside of steel wheel 1 and are formed first side chamber, second side chamber and are located the middle cavity between first side chamber and the second side chamber. First side chamber is used for placing vibrating motor 2, be connected through the connecting axle sleeve between vibrating motor 2 and the transmission shaft 3, in order to guarantee the rotation effect of connecting axle sleeve, both sides at primary shaft bearing 11 are provided with apron 12 and bottom plate 13 respectively, make primary shaft bearing 11 be connected with vibrating motor 2 through apron 12, primary shaft bearing 11 is connected with the first riser through bottom plate 13, at primary shaft bearing 11, the accommodation space that apron 12 and bottom plate 13 enclose is used for placing biserial tapered roller bearing 14, the connecting axle sleeve is worn to locate in biserial tapered roller bearing 14, connecting axle sleeve pivoted smooth and easy nature has been guaranteed.
In order to guarantee the rotation effect of transmission shaft 3, as shown in fig. 1, parallel interval is provided with third riser and fourth riser between first riser and second riser, and the one end of third riser and the one end of fourth riser all are connected with first riser and second riser through the first diaphragm, and the other end of third riser and the other end of fourth riser all are connected with first riser and second riser through the second diaphragm for cut apart the formation of a plurality of subcavities with the middle chamber. Wherein the space that first riser, third riser, first diaphragm and second diaphragm enclose is used for holding one of them vibration hydro-cylinder 4, and the space that second riser, fourth riser, first diaphragm and second diaphragm enclose is used for holding another one vibration hydro-cylinder 4.
In order to guarantee the rotation effect of axis of rotation 542, all be provided with outer bearing frame 15 on first riser and second riser, all be provided with inner bearing frame 16 on third riser and fourth riser, all be provided with self-aligning ball bearing 17 in every outer bearing frame 15 and every inner bearing frame 16 for four self-aligning ball bearing 17 can be worn to establish respectively by transmission shaft 3, when self-aligning ball bearing 17 played the 3 supporting role of transmission shaft, transmission shaft 3 pivoted smooth and easy nature has still been guaranteed. Optionally, there is a shock absorber 8 on the fourth riser through shock-absorbing bracket connection, and shock absorber 8 has played the effect of shock attenuation to steel wheel 1.
Further, the number of the vibration oil cylinders 4 is two, as shown in fig. 1, each vibration oil cylinder 4 is sleeved on the transmission shaft 3 and communicated with the oil duct, and the two vibration oil cylinders 4 are symmetrically arranged on the transmission shaft 3, so that a stable and balanced effect is achieved. Because two vibration hydro-cylinders 4 set up respectively in the both sides of transmission shaft 3, if the position of piston 41 is inconsistent in two vibration hydro-cylinders 4 for the volume is also different in the hydraulic oil of storage in the vibration hydro-cylinder 4, the exciting force that the steel wheel 1 is located the left and right sides can be different when vibrating, thereby the compaction effect of treating compaction road surface material is treated in the influence, in order to solve this problem, all be provided with displacement sensor in the inside of every vibration hydro-cylinder 4 for detect the position of piston 41.
In order to ensure that hydraulic oil can be supplied to the oil channels, the vibratory roller further comprises an oil supply assembly 5, the oil supply assembly 5 is arranged inside the steel wheel 1 and connected to the transmission shaft 3, and the oil supply assembly 5 is respectively communicated with the first oil channel and the second oil channel and used for conveying the hydraulic oil. If the oil supply assembly 5 adopts a mode that a plurality of oil supply pipelines are communicated with the oil channels, the condition of the rotation winding of the oil supply pipelines can occur along with the rotation of the transmission shaft 3, in order to solve the problem, the oil supply assembly 5 comprises an oil supply bracket 51, an oil inlet pipe 52, an oil return pipe 53 and a rotary joint 54, the oil supply bracket 51 plays a role in intermediate connection support, one end of the oil supply bracket 51 is rotatably connected to the steel wheel 1, the other end of the oil supply bracket is used for fixing the oil inlet pipe 52 and the oil return pipe 53, the oil inlet pipe 52 is communicated with the first oil channel through the rotary joint 54, and the oil return pipe 53 is communicated with the second oil channel through the rotary joint 54.
It will be appreciated that the steel wheel 1 is generally centred on and rotatable relative to an axis of rotation which is fixedly arranged relative to the steel wheel 1, and that the oil feed bracket 51 may preferably be provided on this fixedly arranged axis of rotation.
Further, the oil inlet pipe 52 and the oil return pipe 53 communicate with an external hydraulic component, and the rotary joint 54 is connected to the rotary shaft 542. As shown in fig. 1, the rotary joint 54 includes a housing 541, a rotating shaft 542 and a rotary bearing, the rotary bearing is disposed between the housing 541 and the rotating shaft 542, so that the rotating shaft 542 can rotate relative to the housing 541, one end of the rotating shaft 542 is connected to the transmission shaft 3, the other end of the rotating shaft is disposed through the housing 541, a first communicating oil passage and a second communicating oil passage are disposed in the rotating shaft 542, the oil inlet pipe 52 is communicated with the first oil passage through the first communicating oil passage, and the second oil passage is communicated with the oil return pipe 53 through the second communicating oil passage.
A first communicating oil passage and a second communicating oil passage are formed in the rotary joint 54, so that the oil inlet pipe 52 and the oil return pipe 53 are communicated with the first oil passage and the second oil passage through the rotary joint 54. By adopting the mode, the conversion of the hydraulic element from static or linear motion to high-speed rotation motion in the field of engineering machinery is realized, and the centrifugal force of the transmission shaft 3 is adjusted by controlling the oil quantity flowing into the vibration oil cylinder 4, so that the range of the exciting force of the steel wheel 1 can be adaptively adjusted.
Fig. 2 is a hydraulic schematic diagram of a hydraulic system for stepless amplitude modulation in a vibratory roller according to the invention. In order to realize the adjustment of the oil inlet of the upper cavity and the oil return of the lower cavity in the vibration oil cylinder 4, the vibration roller further comprises a stepless amplitude modulation hydraulic system 6, as shown in fig. 2, the stepless amplitude modulation hydraulic system 6 comprises an amplitude modulation pump 61 and an amplitude modulation electromagnetic valve assembly 62, the amplitude modulation pump 61 conveys hydraulic oil into the rotary joint 54 through the amplitude modulation electromagnetic valve assembly 62, and a bidirectional hydraulic lock 63 is arranged between the rotary joint 54 and the vibration oil cylinder 4 and used for locking the position of the piston 41 relative to the cylinder body. Therein, the amplitude modulation solenoid valve assembly 62 includes a first amplitude modulation solenoid valve 621 and a second amplitude modulation solenoid valve 622.
When the first amplitude modulation electromagnetic valve 621 is powered off, the hydraulic pipeline in the stepless amplitude modulation hydraulic system 6 is closed, and the amplitude modulation pump 61 pumps the hydraulic oil filtered by the coarse filter and directly returns to the oil tank through the fine filter.
When the first amplitude modulation electromagnetic valve 621 is powered on, the right position of the first amplitude modulation electromagnetic valve 621 works, the right position of the second amplitude modulation electromagnetic valve 622 works, the amplitude modulation pump 61 extracts hydraulic oil filtered by the strainer, the hydraulic oil sequentially passes through the first amplitude modulation electromagnetic valve 621 and the second amplitude modulation electromagnetic valve 622 and is introduced into the rotary joint 54, then the hydraulic oil enters the shunt throttle valve 64, and the shunt throttle valve 64 plays a role in shunt throttling and reducing pressure fluctuation. In order to ensure that the piston 41 in each vibration cylinder 4 remains unchanged after reaching the preset position, a two-way hydraulic lock 63 is provided between the shunt throttle 64 and the vibration cylinder 4 for locking the position of the piston 41 relative to the cylinder. The two-way hydraulic lock 63 is two one-way valves, wherein one of the two-way valves is communicated with a pilot port of the other one-way valve.
Specifically, the hydraulic oil cylinder is divided into two branches through a diversion throttle valve 64, the two branches are respectively and correspondingly communicated with two vibration oil cylinders 4, for example, one branch enters a one-way valve on the left side of a two-way hydraulic lock 63 and enters a one-way valve pilot port on the right side of the two-way hydraulic lock 63, the one-way valves on the left side and the right side are opened along with the rise of the hydraulic oil pressure, the one-way valve on the left side is opened for oil feeding of an upper cavity of the vibration oil cylinder 4, the one-way valve on the right side is opened for oil returning of a lower cavity of the vibration oil cylinder 4, at this time, even if the vibration oil cylinder 4 rotates at a high speed, the position of a piston 41 is not changed, so that the position of the piston 41 is kept unchanged, and the locking of the piston 41 relative to the position of the cylinder body is realized.
By adopting the arrangement, the two branches respectively supply oil to the vibration oil cylinders 4 corresponding to the two branches, so that the centrifugal force of the two vibration oil cylinders 4 is the same, the two vibration oil cylinders 4 are symmetrically arranged on the transmission shaft 3, and the positions of the pistons 41 corresponding to the two vibration oil cylinders are locked by each bidirectional hydraulic lock 63, so that the relative positions of the two pistons 41 are kept consistent, the centrifugal force generated by the two vibration oil cylinders 4 is the same, and the consistency of the compaction effect of the steel wheel 1 on the road surface material to be compacted is ensured.
Fig. 3 is a hydraulic schematic diagram of a stepless frequency-modulation hydraulic system in the vibratory roller of the present invention. In order to realize the adjustment of the rotating speed of the vibration motor 2, as shown in fig. 3, the vibratory roller further includes a stepless frequency modulation hydraulic system 7, the stepless frequency modulation hydraulic system 7 specifically includes three parts, namely a frequency modulation vibration pump 71, a filter 72 and the vibration motor 2, the filter 72 is used for filtering hydraulic oil pumped by the frequency modulation vibration pump 71, and the frequency modulation vibration pump 71 is used for adjusting the rotating speed of the vibration motor 2.
The frequency-modulated vibration pump 71 is an integrated pump, the frequency-modulated vibration pump 71 comprises an oil supplementing pump 711, a first frequency-modulated electromagnetic valve 712, a second frequency-modulated electromagnetic valve 713, a first frequency-modulated servo oil cylinder 714, a frequency-modulated reversing valve 715, a second frequency-modulated servo oil cylinder 716 and a plunger variable pump 717, and the plunger variable pump 717 is an output end. Correspondingly, the vibration motor 2 is an integrated motor, the vibration motor 2 comprises a plunger variable motor 21, an electromagnetic directional valve 22, a frequency modulation servo oil cylinder 23, a flushing valve 24 and an overflow valve 25, the overflow valve 25 plays a role in overflow, and the flushing valve 24 plays roles in heat exchange and protection. The plunger variable displacement motor 21 can be in direct communication with the plunger variable displacement pump 717, i.e. the plunger variable displacement pump 717 can control the vibration motor 2.
Specifically, the oil supplementing pump 711 and the plunger variable pump 717 are in transmission connection through the transmission shaft 3, when the motor rotates and works, the oil supplementing pump 711 and the plunger variable pump 717 are driven to rotate simultaneously, if the input current of the first frequency modulation electromagnetic valve 712 is zero or smaller than the start modulation current, the first frequency modulation electromagnetic valve 712 cannot introduce hydraulic oil into the first frequency modulation servo oil cylinder 714, and the sliding block in the first frequency modulation servo oil cylinder 714 does not move, so that the working position of the frequency modulation reversing valve 715 is a middle position.
The hydraulic oil pumped by the oil supplementing pump 711 is divided into two sub-paths, wherein one sub-path enters the middle position of the frequency modulation reversing valve 715 through the filter 72 and flows back to the oil tank, the sliding blocks in the first frequency modulation servo oil cylinder 714 and the second frequency modulation servo oil cylinder 716 do not move in the process, and the sliding block in the second frequency modulation servo oil cylinder 716 is rigidly connected with the swash plate of the plunger variable pump 717, so that the swing angle of the swash plate of the plunger variable pump 717 does not change, and the output displacement of the plunger variable pump 717 is zero. The hydraulic oil of the other sub-path enters the electromagnetic directional valve 22, the working position of the electromagnetic directional valve 22 is the right position, the hydraulic oil enters the left cavity of the frequency modulation servo oil cylinder 23, the sliding block of the frequency modulation servo oil cylinder 23 is pushed to move towards the right side, the sliding block of the frequency modulation servo oil cylinder 23 is rigidly connected with the swash plate of the plunger variable motor 21 through the connecting rod, the swing angle of the swash plate of the plunger variable motor 21 is changed, and the displacement of the vibration motor 2 is the maximum displacement at the moment.
The hydraulic oil pumped by the oil supply pump 711 is divided into two sub-paths, which are independent of each other and are used for adjusting the displacement of the plunger variable displacement pump 717 and the vibration motor 2, respectively. When the input current of the first frequency modulation solenoid valve 712 is increased and opened, one of the sub-paths enters the first frequency modulation solenoid valve 712 through the filter 72, then enters the left cavity of the first frequency modulation servo cylinder 714 and pushes the slide block of the first frequency modulation servo cylinder 714 to move towards the right side, the slide block of the first frequency modulation servo cylinder 714 is connected with the frequency modulation reversing valve 715 for moving and transposition of the frequency modulation reversing valve 715, at the moment, the working position of the frequency modulation reversing valve 715 is the left position, then the hydraulic oil flowing in through the frequency modulation reversing valve 715 enters the left cavity of the second frequency modulation servo cylinder 716 and pushes the slide block of the second frequency modulation servo cylinder 716 to move towards the right side, so as to drive the swash plate of the plunger variable pump 717 to move to change the displacement of the plunger variable pump 717, thereby realizing the main regulation effect on the rotating speed of the vibration motor 2.
It should be noted that, since the displacement of the movement is proportional to the current magnitude of the first frequency modulation solenoid valve 712, the displacement is controlled in an electrical proportional manner, so that the plunger variable displacement pump 717 maintains the displacement corresponding to the input current of the first frequency modulation solenoid valve 712. Meanwhile, in the second fm servo cylinder 716, the pre-pressure of the spring provided on both sides of the slider determines the modulation current and the modulation pressure of the displacement of the plunger variable displacement pump 717.
The other sub path divided by the hydraulic oil pumped by the oil supplementing pump 711 enters the electromagnetic directional valve 22 of the vibration motor 2, the working position of the electromagnetic directional valve 22 is the right position, the hydraulic oil enters the left position of the frequency modulation servo oil cylinder 23 through the electromagnetic directional valve 22 and pushes the slide block of the frequency modulation servo oil cylinder 23 to move, and the slide block of the frequency modulation servo oil cylinder 23 is rigidly connected with the swash plate of the vibration motor 2 through a connecting rod, so that the swing angle of the swash plate of the vibration motor 2 is changed, and secondary adjustment of the vibration motor 2 is realized.
Thus, for stepless amplitude modulation, it is achieved by changing the position of the piston 41 in the vibration cylinder 4, and for stepless frequency modulation, it is achieved by adjusting the rotation speed of the vibration motor 2. Because the materials to be compacted in different pavement base layers are different, the compactness before and after the crushed stone, soil, concrete, asphalt and the like are compacted is different, in order to ensure the accuracy of the stepless amplitude modulation and stepless frequency modulation adjusting process, a compactness sensor 9 (shown in figure 1) can be arranged on the outer side of the steel wheel 1, and the compactness sensor 9 is used for detecting the compactness of the pavement materials to be compacted. The compactness sensor 9 is electrically connected to the control mechanism, and the control mechanism respectively controls the stepless amplitude modulation system and the stepless frequency modulation system to provide corresponding exciting force. Under the action of the exciting force, the compacted material particles are in a vibration state by adopting a vibration compaction mode, and small particles are filled in large particle gaps, so that the compaction effect of the roadbed and the road surface is ensured.
It can be understood that, the vibratory roller has a walking function when the steel wheel 1 rolls on the ground and the road, the moving speed of the steel wheel 1 can also have a certain influence on the compaction effect, and the moving speed of the steel wheel 1 is detected through the speed sensor.
Fig. 4 is a schematic view of the control structure of the vibratory roller of the invention. As the road roller is basically operated in a construction site with a poor environment, the construction environment is poor, and the continuous operation time is long, so that the road roller frequently breaks down, and in order to ensure that the fault treatment is completed quickly, as shown in fig. 4, the control mechanism of the vibratory roller specifically comprises a first control module, a second control module, a third control module, a fourth control module and a fifth control module. The first control module is electrically connected to the compactness sensor 9, the rotation speed sensor and the speed sensor respectively, and acquires information detected by the three sensors. The control module II is a fuzzy PID self-adaptive data processor, the control module III is a fault analysis database, the control module IV is synchronous control processing of the two vibration oil cylinders 4, the control module V is man-machine switching, and data parameters and fault diagnosis detected by each sensor can be displayed on a display screen.
When the vibratory roller works, the compactness sensor 9 detects the compactness of a material to be compacted, the rotating speed sensor detects the rotating speed of the vibrating motor 2 and the speed sensor detects the running speed of the steel wheel 1, and the detection data are subjected to analog-digital conversion through the first control module, and are displayed on a display screen through the fifth control module; and on the other hand, the detection data is transmitted to a second control module. Meanwhile, each displacement sensor detects the position of the piston 41 in the corresponding vibration oil cylinder 4, the position information is processed by the control module IV and then fed back to the control module II, the control module II performs fuzzy PID self-adaptive data processing on the data in the two aspects at the moment, and the stepless frequency modulation system are respectively controlled through digital-analog conversion after the processing, so that the stepless frequency modulation and amplitude modulation closed-loop feedback control is realized, and the advantages of real-time detection, high control precision and high corresponding speed are achieved.
When each sensor works, the operation parameters of each part are detected in real time, the detected data enter a parameter judgment module to be compared with preset working condition parameters of the road roller, if the detected parameters are abnormal, the road roller is stopped to alarm, then a fault analysis database is compared, corresponding fault information or codes are found out and are displayed on a display screen through a control module V.
When a certain structure of the road roller is in a problem during working, all sensors feed detection parameters back to a corresponding control module and compare the detection parameters with related parameters in a fault analysis database, all possible fault phenomena and processing methods of the vibratory road roller are stored in the fault analysis database, fault reasons are found out through operational reasoning, an accurate processing method is given out, the fault reasons and fault processing measures are directly displayed on a display screen, an operator only needs to repair or replace parts according to prompts to eliminate faults, time for troubleshooting, fault analysis and processing is greatly saved, and operation efficiency is improved.
The embodiment further provides a method for controlling the vibratory roller, which is used for controlling the vibratory roller, and the method for controlling the vibratory roller comprises the following steps: according to the compactness of the pavement material to be compacted, the stepless amplitude modulation process of the steel wheel 1 is realized by adjusting the position of the piston 41 in the vibration oil cylinder 4, and the stepless frequency modulation process of the steel wheel 1 is realized by adjusting the rotating speed of the vibration motor 2.
According to the control method of the vibratory roller, the exciting force is adjusted through stepless amplitude modulation and stepless frequency modulation according to the compactness of different materials to be compacted, so that the compactness and the flatness of the compacted surface of the pavement are guaranteed.
The control method of the vibratory roller comprises a manual regulation mode and an automatic regulation mode, wherein the automatic regulation mode is preferentially adopted, and the manual regulation mode plays a role in assisting and supplementing the automatic regulation mode.
After the automatic adjustment is selected, actual working condition parameters (the actual working condition parameters specifically include the compactness of the pavement material to be compacted and the actual moving speed of the steel wheel 1) are obtained through various sensors, and the actual working condition parameters need to be compared with the preset working condition parameter range in the database.
And if the actual working condition parameters meet the preset working condition parameter range, the vibration compaction parameters are matched. The starting vibration variable shielding is a signal of using database parameters, and if the vibration compaction parameters are matched, the vibration variable shielding is started to start the database, and the preset working condition parameters of the vibration compaction parameters matched with the database in the database are directly utilized and read to finish vibration starting.
If the actual working condition parameters do not meet the preset working condition parameter range, the deviation exists between the actual working condition parameters and the preset working condition parameters in the database, the vibration compaction parameters are not matched, and the vibration variable shielding is cancelled, so that the use function of the database parameters is closed. And at the moment, fuzzy PID self-adaptive data processing and calculation are carried out according to a control module II in the control mechanism, then working condition parameters close to the actual working condition in the database are read, corresponding correction is carried out on the working condition parameters on the basis, corrected vibration parameters are formed, and an automatic amplitude modulation system and an automatic frequency modulation system are respectively started to finish the starting vibration process.
When the optimal compaction parameters of the material to be compacted do not exist in the database, a manual adjustment mode is selected to enter manual parameter setting, vibration parameters are manually input by a user according to experience, and stepless amplitude modulation and stepless frequency modulation are performed according to the vibration parameters to complete the vibration starting process.
The manual adjustment mode and the automatic adjustment mode can meet the requirements of different customers, and the situation that the vibration cannot be started because certain compactness parameters corresponding to special roadbed and pavement materials to be compacted are not recorded in a database is avoided; meanwhile, the situation that the automatic adjusting mode cannot be started normally due to the fault of the electric control system can be avoided, and therefore the vibratory roller can work normally and efficiently under various conditions.
Fig. 5 is a flow chart of a vibratory roller control method of the present invention. As shown in fig. 5, the flow process of the method for controlling a vibratory roller provided in this embodiment is as follows:
s1, starting;
s2, judging whether an automatic adjusting mode is selected, if so, executing S211, and if not, executing S22;
s211, acquiring actual working condition parameters;
s212, reading a preset working condition parameter range;
s213, judging whether the actual working condition parameters meet the preset working condition parameter range, if so, executing S214, and if not, executing S216;
s214, starting a vibration variable shield and reading preset working condition parameters;
s215, starting oscillation, and returning to S2;
s216, canceling the vibration variable shielding, calculating and reading working condition parameters close to the actual working conditions in the database, and performing corresponding correction on the basis to form corrected vibration parameters;
s217, starting an automatic amplitude modulation system and an automatic frequency modulation system, and executing S215;
s22, manually inputting vibration parameters;
and S23, carrying out stepless amplitude modulation and stepless frequency modulation according to the vibration parameters, and executing S215.
In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are based on the orientations and positional relationships shown in the drawings and are used for convenience in description and simplicity in operation, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular operation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. The utility model provides a vibratory roller, includes steel wheel (1) and sets up vibrating motor (2) inside steel wheel (1), its characterized in that the inside of steel wheel (1) still is provided with:
the transmission shaft (3) is connected to the output end of the vibration motor (2), and a first oil channel and a second oil channel are formed in the transmission shaft (3);
the vibration oil cylinder (4) comprises a cylinder body sleeved on the transmission shaft (3) and a piston (41) arranged in the cylinder body in a sliding mode, the piston (41) can divide the cylinder body into an upper cavity and a lower cavity, the first oil duct is communicated with the upper cavity, the second oil duct is communicated with the lower cavity, and the upper cavity and the lower cavity are both located on the same side of the axis of the transmission shaft (3);
the vibration motor (2) can drive the vibration oil cylinder (4) to rotate through the transmission shaft (3), and the centrifugal force of the transmission shaft (3) is adjusted by adjusting the position of the piston (41) relative to the cylinder body, so that the excitation force of the steel wheel (1) is adjustable;
the hydraulic system (7) with the stepless frequency modulation function is further included, the hydraulic system (7) with the stepless frequency modulation function comprises a frequency modulation vibration pump (71), and the frequency modulation vibration pump (71) is used for adjusting the rotating speed of the vibration motor (2); the frequency modulation vibration pump (71) comprises an oil supplementing pump (711), a first frequency modulation electromagnetic valve (712), a second frequency modulation electromagnetic valve (713), a first frequency modulation servo oil cylinder (714), a frequency modulation reversing valve (715), a second frequency modulation servo oil cylinder (716) and a plunger variable pump (717), wherein the plunger variable pump (717) is an output end;
vibrating motor (2) are including plunger variable motor (21), electromagnetic directional valve (22) and frequency modulation servo cylinder (23) that communicate each other, and plunger variable motor (21) can directly communicate with plunger variable pump (717), and hydraulic oil can pass through electromagnetic directional valve (22) get into in frequency modulation servo cylinder (23), and promote slider in frequency modulation servo cylinder (23) removes, the slider pass through the connecting rod with the sloping cam plate of plunger variable motor (21) is connected, is used for adjusting the pivot angle of sloping cam plate.
2. The vibratory roller according to claim 1, further comprising an oil supply assembly (5), wherein the oil supply assembly (5) is disposed inside the steel wheel (1) and connected to the transmission shaft (3), and the oil supply assembly (5) is respectively communicated with the first oil passage and the second oil passage for conveying hydraulic oil.
3. The vibratory roller according to claim 2, wherein the oil supply assembly (5) comprises an oil supply bracket (51), an oil inlet pipe (52), an oil return pipe (53) and a rotary joint (54) connected to the transmission shaft (3), one end of the oil supply bracket (51) is rotatably arranged with the steel wheel (1), the other end of the oil supply bracket is used for fixing the oil inlet pipe (52) and the oil return pipe (53), the oil inlet pipe (52) is communicated with the first oil channel through the rotary joint (54), and the oil return pipe (53) is communicated with the second oil channel through the rotary joint (54).
4. The vibratory roller according to claim 3, wherein the rotary joint (54) comprises a housing (541), a rotating shaft (542) and a rotary bearing, the rotary bearing is arranged between the housing (541) and the rotating shaft (542) to enable the rotating shaft (542) to rotate relative to the housing (541), one end of the rotating shaft (542) is connected to the transmission shaft (3), the other end of the rotating shaft (542) penetrates through the housing (541), a first communicating oil passage and a second communicating oil passage are formed in the rotating shaft (542), the oil inlet pipe (52) is communicated with the first oil passage through the first communicating oil passage, and the second oil passage is communicated with the oil return pipe (53) through the second communicating oil passage.
5. The vibroroller according to claim 3, characterized by further comprising a hydraulic system (6) of stepless amplitude modulation, said hydraulic system (6) of stepless amplitude modulation comprising an amplitude modulation pump (61) and an amplitude modulation solenoid valve assembly (62), said amplitude modulation pump (61) delivering hydraulic oil into the swivel joint (54) through said amplitude modulation solenoid valve assembly (62), a bidirectional hydraulic lock (63) being provided between said swivel joint (54) and said vibroroller (4) for locking the position of said piston (41) with respect to said cylinder.
6. A method of controlling a vibratory roller according to any of claims 1-5, the method comprising the steps of:
according to the compactness of the pavement material to be compacted, the stepless amplitude modulation process of the steel wheel (1) is realized by adjusting the position of a piston (41) in a vibration oil cylinder (4), and the stepless frequency modulation process of the steel wheel (1) is realized by adjusting the rotating speed of a vibration motor (2).
7. A method of controlling a vibratory roller as claimed in claim 6 including an automatic adjustment mode, the automatic adjustment mode including the steps of: and acquiring actual working condition parameters, when the actual working condition parameters cannot meet the range of the preset working condition parameters, calculating and reading working condition parameters close to the actual working conditions in the database, and carrying out corresponding correction on the basis of the working condition parameters to form a correction, and then starting the automatic amplitude modulation system and the automatic frequency modulation system.
8. A method of controlling a vibratory roller as claimed in claim 6 further comprising a manual adjustment mode, the manual adjustment mode comprising the steps of: after the user manually inputs the vibration parameters, stepless amplitude modulation and stepless frequency modulation are carried out according to the vibration parameters.
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| CN201910561125.4A CN110258262B (en) | 2019-06-26 | 2019-06-26 | Vibratory roller and vibratory roller control method |
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| CN201910561125.4A CN110258262B (en) | 2019-06-26 | 2019-06-26 | Vibratory roller and vibratory roller control method |
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