CN111305008A - Hydraulic vibration system of road roller and control method thereof - Google Patents
Hydraulic vibration system of road roller and control method thereof Download PDFInfo
- Publication number
- CN111305008A CN111305008A CN202010195307.7A CN202010195307A CN111305008A CN 111305008 A CN111305008 A CN 111305008A CN 202010195307 A CN202010195307 A CN 202010195307A CN 111305008 A CN111305008 A CN 111305008A
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- hydraulic
- port
- valve group
- hydraulic motor
- pressure oil
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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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses a hydraulic vibration system of a road roller and a control method thereof, wherein the hydraulic vibration system comprises a hydraulic pump, a hydraulic motor and a valve bank; the hydraulic pump and the hydraulic motor are connected in parallel to form a closed loop; the valve group is connected with the hydraulic motor in parallel, an A port, a B port, a C port and a D port are respectively arranged on the valve group, the A port and the B port of the valve group are connected with one end of the hydraulic motor, and the C port and the D port of the valve group are connected with the other end of the hydraulic motor. Aiming at solving the technical defects that the existing system has large impact and is not stable and the vibration exciter has a rebound phenomenon when vibration is stopped, the valve core is positioned at the middle position under the action of the forces of the springs at two sides through the valve group, the pressure oil in two cavities of the hydraulic motor is communicated through the middle position of the valve group, the function of stable braking is realized through the intercommunication of the pressure oil, the technical effects of quick and stable vibration stopping and small impact when the vibration of the road roller is stopped are realized, and the reliability of the vibration exciter can be improved.
Description
Technical Field
The invention relates to a hydraulic vibration system of a road roller and a control method thereof, belonging to the technical field of hydraulic engineering machinery.
Background
At present, the existing vibration system of a road roller consists of a variable plunger pump and a quantitative plunger motor, and the motor drives the vibration exciter of the road roller. When vibration is stopped, the existing system has large impact and is not stable, and the vibration exciter has a rebound phenomenon.
Disclosure of Invention
The invention aims to overcome the technical defects in the prior art, solve the technical problems and provide a hydraulic vibration system of a road roller and a control method thereof.
The invention adopts the following technical scheme: a hydraulic vibration system of a road roller is characterized by comprising a hydraulic pump, a hydraulic motor and a valve group; the hydraulic pump and the hydraulic motor are connected in parallel to form a closed loop; the valve group is connected with the hydraulic motor in parallel, an A port, a B port, a C port and a D port are respectively arranged on the valve group, the A port and the B port of the valve group are connected with one end of the hydraulic motor, and the C port and the D port of the valve group are connected with the other end of the hydraulic motor.
As a preferred embodiment, the valve set is a three-position two-way pilot-controlled valve set.
In a preferred embodiment, the upper and lower positions of the valve block are off, and the middle position of the valve block is a passage.
As a preferred embodiment, the valve group includes valve body, case, spring, and the case slides and sets up in the inside center of valve body, and the both ends of spring fixed connection case's lateral wall, the inside wall of valve body respectively.
As a better embodiment, when the hydraulic pump drives the hydraulic motor to rotate in the forward direction, high-pressure oil enters the port A and the port B of the valve group, so that the port B and the port C of the valve group are cut off, a hydraulic vibration system of the road roller works normally, and when vibration is stopped, pressure oil in two cavities of the hydraulic motor is communicated through a middle position of the valve group, the pressure oil is communicated, and stable braking is realized.
As a better embodiment, when the hydraulic pump drives the hydraulic motor to rotate reversely, high-pressure oil enters the port C and the port D of the valve bank to cut off the port B and the port C of the valve bank, the hydraulic vibration system of the road roller works normally, when vibration is stopped, pressure oil in two cavities of the hydraulic motor is communicated through the middle position of the valve bank, and the pressure oil is communicated with each other to realize stable braking.
The invention also provides a control method of the hydraulic vibration system of the road roller, which is characterized by comprising the following steps: a hydraulic pump driving hydraulic motor forward rotation control step; and a hydraulic pump driving the hydraulic motor to rotate reversely.
As a preferred embodiment, the step of controlling the forward rotation of the hydraulic motor driven by the hydraulic pump specifically includes: when the hydraulic pump drives the hydraulic motor to rotate forwards, high-pressure oil enters the port A and the port B of the valve group, the valve core of the valve group is in upper connection, the port B and the port C of the valve group are cut off, the hydraulic vibration system of the road roller normally works, when vibration is stopped, the valve group enables the valve core to be in a middle position under the action of force of springs on two sides, and pressure oil in two cavities of the hydraulic motor is communicated through the middle position of the valve group and is communicated through pressure oil, so that stable braking is realized.
As a preferred embodiment, the hydraulic pump driving the hydraulic motor to rotate reversely comprises: when the hydraulic pump drives the hydraulic motor to rotate reversely, high-pressure oil enters the port C and the port D of the valve bank, the valve core of the valve bank is communicated at the lower position, the port B and the port C of the valve bank are cut off, the hydraulic vibration system of the road roller normally works, when vibration is stopped, the valve bank enables the valve core to be at the middle position under the action of force of springs at two sides, and pressure oil in two cavities of the hydraulic motor is communicated through the middle position of the valve bank and is communicated through the pressure oil, so that stable braking is realized.
As a preferred embodiment, the valve group adopts a three-position two-way hydraulic control valve group; the upper and lower positions of the valve group are cut-off, and the middle position of the valve group is a passage.
The invention achieves the following beneficial effects: aiming at solving the technical defects that the existing system has large impact and is not stable and the vibration exciter has a rebound phenomenon when the vibration is stopped, the invention designs a hydraulic vibration system of the road roller and a control method thereof, wherein a valve core is positioned at the middle position under the action of the forces of springs at two sides through a valve group, pressure oil of two cavities of a hydraulic motor is communicated through the middle position of the valve group, and stable braking is realized through the intercommunication of the pressure oil, so that the technical effects of quick and stable vibration stopping and small impact when the vibration of the road roller is stopped are realized, and the reliability of the vibration exciter can be improved.
Drawings
FIG. 1 is a schematic diagram of a hydraulic vibratory system for a road roller of the present invention.
Fig. 2 is a schematic view of the valve block of the present invention.
The meanings of the symbols in the figures: 1-hydraulic pump, 2-hydraulic motor, 3-valve bank, 4-valve body, 5-valve core, 6-spring.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1: as shown in fig. 1 and 2, the invention provides a hydraulic vibration system of a road roller, comprising a hydraulic pump 1, a hydraulic motor 2 and a valve group 3; the hydraulic pump 1 and the hydraulic motor 2 are connected in parallel to form a closed loop; the valves 3 are connected with the hydraulic motor 2 in parallel, the valve group 3 is provided with an A port, a B port, a C port and a D port, the A port and the B port of the valve group 3 are connected with one end of the hydraulic motor 2, and the C port and the D port of the valve group 3 are connected with the other end of the hydraulic motor 2.
The valve group 3 adopts a three-position two-way hydraulic control valve group; the upper and lower positions of the valve group 3 are cut-off, and the middle position of the valve group 3 is a passage; when hydraulic pump 1 drives hydraulic motor 2 forward rotation, high-pressure oil gets into A mouth and the B mouth of valves 3, makes the B mouth and the C mouth of valves 3 cut off, and road roller hydraulic vibration system normally works, and when stopping vibrating, the pressure oil in 2 two chambeies of hydraulic motor communicates through 3 meso-position of valves, and pressure oil intercommunication realizes steady braking. When hydraulic pump 1 drive hydraulic motor 2 counter rotation, high-pressure oil gets into C mouth and the D mouth of valves 3, makes the B mouth and the C mouth of valves 3 cut off, and road roller hydraulic vibration system normally works, and when stopping vibrating, the pressure oil in 2 two chambeies of hydraulic motor communicates through 3 meso-position of valves, and pressure oil intercommunication realizes steady braking.
Example 2: the valve group 3 comprises a valve body 4, a valve core 5 and a spring 6, wherein the valve core 5 is arranged in the inner center of the valve body 4 in a sliding manner, two ends of the spring 6 are respectively fixedly connected with the outer side wall of the valve core 5 and the inner side wall of the valve body 4, and the rest are the same as those of the embodiment 1.
Example 3: the invention also provides a control method of the hydraulic vibration system of the road roller, which comprises the following steps: a hydraulic pump 1 driving a hydraulic motor 2 to rotate in a forward direction; the hydraulic pump 1 drives the hydraulic motor 2 to perform a reverse rotation control step.
Wherein, the hydraulic pump 1 drives the hydraulic motor 2 forward rotation control step and specifically includes: when hydraulic pump 1 drives hydraulic motor 2 forward rotation, high-pressure oil gets into A mouth and the B mouth of valves 3, makes valve core 5 of valves 3 be in upper switch-on, and the B mouth and the C mouth of valves 3 cut off, and road roller hydraulic vibration system normally works, and when stopping vibrating, valves 3 make valve core 5 be in the meso position under the effect of both sides spring 6, and the pressure oil in 2 two chambeies of hydraulic motor communicates through the meso position of valves 3, through pressure oil intercommunication, realizes steady braking.
Wherein, the hydraulic pump 1 drives the control step of the counter-rotation of the hydraulic motor 2 and specifically includes: when hydraulic pump 1 drive hydraulic motor 2 reverse rotation, high-pressure oil gets into C mouth and the D mouth of valves 3, makes valve core 5 of valves 3 be in next switch-on, and the B mouth and the C mouth of valves 3 cut off, and road roller hydraulic vibration system normally works, and when stopping vibrating, valves 3 make valve core 5 be in the meso position under the effect of both sides spring 6, and the pressure oil in 2 two chambeies of hydraulic motor communicates through the meso position of valves 3, through pressure oil intercommunication, realizes steady braking.
Example 4: the valve group 3 adopts a three-position two-way hydraulic control valve group; the upper and lower positions of the valve block 3 are cut-off, the middle position of the valve block 3 is a passage, and the rest is the same as that of the embodiment 3.
Aiming at solving the technical defects that the existing system has large impact and is not stable and the vibration exciter has a rebound phenomenon when the vibration is stopped, the invention designs a hydraulic vibration system of the road roller and a control method thereof, wherein the valve core 5 is positioned at the middle position under the action of the forces of the springs 6 at two sides through the valve group 3, the pressure oil in two cavities of the hydraulic motor 2 is communicated through the middle position of the valve group 3, and the stable braking is realized through the intercommunication of the pressure oil, so that the technical effects of quick and stable vibration stopping and small impact when the vibration of the road roller is stopped are realized, and the reliability of the vibration exciter can be improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A hydraulic vibration system of a road roller is characterized by comprising a hydraulic pump (1), a hydraulic motor (2) and a valve bank (3); the hydraulic pump (1) and the hydraulic motor (2) are connected in parallel to form a closed loop; the valve group (3) is connected with the hydraulic motor (2) in parallel, an A port, a B port, a C port and a D port are respectively arranged on the valve group (3), the A port and the B port of the valve group (3) are connected with one end of the hydraulic motor (2), and the C port and the D port of the valve group (3) are connected with the other end of the hydraulic motor (2).
2. A hydraulic vibroramming system according to claim 1, characterized in that said valve group (3) is a three-position two-way pilot operated valve group.
3. A hydraulic vibrorammer system according to claim 1, characterized by the fact that the upper and lower positions of the valve group (3) are cutoff and the middle position of the valve group (3) is passage.
4. The hydraulic vibration system of a road roller according to claim 1, wherein the valve set (3) comprises a valve body (4), a valve core (5) and a spring (6), the valve core (5) is slidably arranged in the center of the interior of the valve body (4), and two ends of the spring (6) are fixedly connected with the outer side wall of the valve core (5) and the inner side wall of the valve body (4) respectively.
5. The hydraulic vibration system of the road roller according to claim 1, characterized in that when the hydraulic pump (1) drives the hydraulic motor (2) to rotate in the forward direction, high-pressure oil enters the port A and the port B of the valve group (3) to cut off the port B and the port C of the valve group (3), the hydraulic vibration system of the road roller works normally, when vibration is stopped, pressure oil in two cavities of the hydraulic motor (2) is communicated through neutral positions of the valve group (3), and the pressure oil is communicated to realize smooth braking.
6. The hydraulic vibration system of the road roller according to claim 1, characterized in that when the hydraulic pump (1) drives the hydraulic motor (2) to rotate reversely, high-pressure oil enters the port C and the port D of the valve group (3) to cut off the port B and the port C of the valve group (3), the hydraulic vibration system of the road roller works normally, when vibration is stopped, pressure oil in two cavities of the hydraulic motor (2) is communicated through neutral positions of the valve group (3), and the pressure oil is communicated with each other to realize smooth braking.
7. A method for controlling a hydraulic vibration system of a road roller according to claim 1, comprising the steps of: a hydraulic pump (1) driving a hydraulic motor (2) to rotate in the forward direction; a hydraulic pump (1) driving a hydraulic motor (2) to rotate in reverse.
8. The method for controlling the hydraulic vibration system of a road roller according to claim 7, wherein the step of controlling the forward rotation of the hydraulic motor (2) driven by the hydraulic pump (1) comprises: when hydraulic pump (1) drive hydraulic motor (2) forward rotation, high-pressure oil gets into A mouth and the B mouth of valves (3), makes case (5) of valves (3) be in the upper switch-on, and the B mouth and the C mouth of valves (3) cut off, road roller hydraulic vibration system normally work, and when the vibration stopping, valves (3) make case (5) be in the meso position under the effect of the power of both sides spring (6), and the pressure oil in two chambeies of hydraulic motor (2) is through the meso position intercommunication of valves (3), through pressure oil intercommunication, realizes steady braking.
9. The method for controlling the hydraulic vibration system of a road roller according to claim 7, wherein the step of controlling the hydraulic pump (1) to drive the hydraulic motor (2) to rotate in reverse specifically comprises: when hydraulic pump (1) drive hydraulic motor (2) counter rotation, high-pressure oil gets into C mouth and the D mouth of valves (3), makes case (5) of valves (3) be in the next switch-on, and the B mouth and the C mouth of valves (3) cut off, road roller hydraulic vibration system normally work, and when stopping vibrating, valves (3) make case (5) be in the meso position under the effect of the power of both sides spring (6), and the pressure oil in two chambeies of hydraulic motor (2) is through the meso position intercommunication of valves (3), through pressure oil intercommunication, realizes steady braking.
10. A method for controlling a hydraulic vibration system of a roller according to any one of claims 8 or 9, wherein said valve group (3) is a three-position two-way pilot-controlled valve group; the upper and lower positions of the valve group (3) are cut off, and the middle position of the valve group (3) is a passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010195307.7A CN111305008A (en) | 2020-03-19 | 2020-03-19 | Hydraulic vibration system of road roller and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010195307.7A CN111305008A (en) | 2020-03-19 | 2020-03-19 | Hydraulic vibration system of road roller and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111305008A true CN111305008A (en) | 2020-06-19 |
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ID=71161194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010195307.7A Pending CN111305008A (en) | 2020-03-19 | 2020-03-19 | Hydraulic vibration system of road roller and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111305008A (en) |
-
2020
- 2020-03-19 CN CN202010195307.7A patent/CN111305008A/en active Pending
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