CN2673931Y - Hydraulic loop for driving front wheel of spreading machine - Google Patents
Hydraulic loop for driving front wheel of spreading machine Download PDFInfo
- Publication number
- CN2673931Y CN2673931Y CN 200420034886 CN200420034886U CN2673931Y CN 2673931 Y CN2673931 Y CN 2673931Y CN 200420034886 CN200420034886 CN 200420034886 CN 200420034886 U CN200420034886 U CN 200420034886U CN 2673931 Y CN2673931 Y CN 2673931Y
- Authority
- CN
- China
- Prior art keywords
- constant pressure
- pressure variable
- variable displacement
- displacement pump
- front wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
The utility model discloses a hydraulic loop for driving front wheel of spreading machine, comprising an oil tank, constant pressure variable pumps, front wheel running motors and a two-way control valve. The oil tank is respectively communicated with the constant pressure variable pumps, the front wheel running motors and the two-way control valve, the constant pressure variable pumps are communicated with the front wheel running motors which are connected in parallel, and the two-way control valve is communicated with the constant pressure variable pumps via the control ports of the constant pressure variable pumps. The hydraulic loop for driving front wheel of spreading machine is characterized in that one end of an electronic proportioning control overflow valve is communicated with the constant pressure variable pumps via the control ports of the constant pressure variable pumps, and the other end of the electronic proportioning control overflow valve is communicated with the oil tank. The optimum driving force distribution of front wheel and back wheel in operating condition with large load variation is ensured, the driving force of the front wheel changes with the variation of the driving force of the back wheel, and thus the working stability of wheel type bitumen spreading machines and other building machinery is ensured.
Description
Technical field
The utility model belongs to the building machinery hydraulic circuit, is specifically related to paver front-wheel drive hydraulic circuit.
Background technology
In building machinery driving process such as wheeled asphalt paver, generally take the front and rear wheel four-wheel drive, existing front-wheel drive all is the mode of constant driving.Fuel tank is connected with constant pressure variable displacement pump, two driving motors in parallel, two logical control valves respectively, constant pressure variable displacement pump is connected with driving motors in parallel, two logical control valves are connected with constant pressure variable displacement pump through the control port of constant pressure variable displacement pump, when two lead to the control valve no power, two logical control valve spools are in the diconnected state, constant pressure variable displacement pump control port is communicated with fuel tank, and the constant pressure variable displacement pump output pressure is very low preparation pressure P
1, the two preceding little driving torque T of wheel motor output stage
1When two logical control valves energisings, two logical control valve spools are in unidirectional fastening position, and promptly hydraulic oil flow to fuel tank from constant pressure variable displacement pump control port and is in closed condition, and the constant pressure variable displacement pump output pressure is constant operating pressure P
2, the driving torque T that the output of two front-wheel driving motors is constant
2Because wheel motor can only be exported constant driving torque T before two
1Or T
2, driving torque can not be regulated and control with the variation of load, can't accomplish best front and back wheel driving force distribution under the bigger operating mode of load variations, so just can't reach best stable working.
The utility model content
The technical problems to be solved in the utility model provides the hydraulic circuit that a kind of driving pressure of front-wheel driving motors can be regulated and control according to the variation of load.
The technical solution adopted in the utility model is: fuel tank is connected with constant pressure variable displacement pump, front-wheel driving motors, two logical control valves respectively, constant pressure variable displacement pump is connected with driving motors in parallel, two logical control valves are connected with constant pressure variable displacement pump through the control port of constant pressure variable displacement pump, electricity proportional control overflow valve one end is connected with constant pressure variable displacement pump through the control port of constant pressure variable displacement pump, and the other end is connected with fuel tank.
Improvement of the present utility model is connected with the motor operations control valve between constant pressure variable displacement pump and motor.
Further improvement of the utility model, signal amplifying apparatus are connected with electric proportional control overflow valve and pressure sensitive device respectively, and the pressure sensitive device contacts with the pressure hydraulic fluid port of rear wheel drive hydraulic circuit.
When two led to the control valve no power, change-over valve core was in the diconnected state, and constant pressure variable displacement pump control port and fuel tank are in connected state, and the constant pressure variable displacement pump output pressure is very low preparation pressure P
1, the driving torque T that the output of two front-wheel driving motors is minimum
1When two logical control valves are switched on, two logical control valve spools are in unidirectional fastening position, the oil pressure of constant pressure variable displacement pump control port is controlled by electric proportional control overflow valve, on the pressure hydraulic fluid port in rear wheel drive loop, insert a pressure sensor, fuel injection pressure signal on the detected rear wheel drive hydraulic circuit system after signal amplifying apparatus amplifies as the control signal of electric proportional control overflow valve, thereby reach the front-wheel drive moment of torsion at T
1With T
2Between.
Owing to adopted technique scheme, guaranteed under the bigger operating mode of load variations, to accomplish best front and back wheel driving force distribution, front-wheel drive power changes according to the variation of rear wheel drive power, thereby has guaranteed the stationarity of building machinery work such as wheeled asphalt paver.
Description of drawings
Fig. 1 is a schematic diagram of the present utility model;
Wherein:
1, fuel tank 2, constant pressure variable displacement pump 3, motor operations control valve,
4, front-wheel driving motors 5, front-wheel driving motors 6, two logical control valves,
7, control port 8, electric proportional control overflow valve 9, signal amplifying apparatus,
10, pressure sensitive device 11, pressure hydraulic fluid port.
The specific embodiment
The utility model is the improvement at building machinery front-wheel drive hydraulic circuits such as existing pavers.Be that example describes with wheeled asphalt paver below, referring to accompanying drawing, fuel tank 1 is connected with constant pressure variable displacement pump 2, motor 4, motor 5, two logical control valves 6 respectively, constant pressure variable displacement pump 2 is connected with driving motors 4 in parallel, motor 5, two logical control valves 6 are connected with constant pressure variable displacement pump 2 through the control port 7 of constant pressure variable displacement pump 2, electricity proportional control overflow valve 8 one ends are connected with constant pressure variable displacement pump 2 through the control port 7 of constant pressure variable displacement pump 2, and the other end is connected with fuel tank 1.Be connected with motor operations control valve 3 between constant pressure variable displacement pump 2 and motor 4, the motor 5.Signal amplifying apparatus 9 is connected with electric proportional control overflow valve 8 and pressure sensitive device 10 respectively, and pressure sensitive device 10 is positioned on the pressure hydraulic fluid port 11 of rear wheel drive hydraulic circuit, and this pressure sensitive device 10 is a pressure sensor.
When two led to control valve 6 no powers, the spools of two logical control valves 6 were in the diconnected state, and the control port 7 of constant pressure variable displacement pump 2 directly is communicated with fuel tank 1, and the control oil pressure of control port 7 is very little, and constant pressure variable displacement pump 2 output pressures are very low preparation pressure P
1, wheel motor 4, the minimum driving torque T of motor 5 outputs before parallel connection this moments two
1When two logical control valves 6 are switched on, the spool of two logical control valves 6 is in unidirectional fastening position, to be hydraulic oil flow to fuel tank 1 from the control port 7 of constant pressure variable displacement pump 2 through two logical control valves 6 is in closed condition, at this moment, the oil pressure of the control port 7 of constant pressure variable displacement pump 2 is subjected to electric proportional control overflow valve 8 controls, on the pressure hydraulic fluid port 11 of rear wheel drive hydraulic circuit, insert a pressure sensor, the pressure signal of the detected rear wheel drive hydraulic circuit system of pressure sensor after signal amplifying apparatus 9 amplifies as the control signal of electric proportional control overflow valve 8, when the control signal of electric proportional control overflow valve 8 is zero, at this moment, hydraulic oil flow to fuel tank 1 from the control port 7 of constant pressure variable displacement pump 2 through electric proportional control overflow valve 8 and is in closed condition, and constant pressure variable displacement pump 2 output pressures are constant operating pressure P
2, the driving torque T that the output of two front-wheel driving motors is constant
2When the oil pressure of rear wheel drive hydraulic circuit changed, the control signal of electric proportional control overflow valve 8 changed thereupon, and then the front-wheel drive moment of torsion also changes, but the front-wheel drive moment of torsion is at T
1With T
2Between change, promptly the front-wheel drive moment of torsion subsequently the wheel drive torque proportion relation change, then wheel drive torque changes with the variation of load.
Owing to adopted technique scheme, guaranteed under the bigger operating mode of load variations, to accomplish that the front-wheel drive moment of torsion changes with the variation of load, thereby guarantee best front and back wheel driving force distribution, front-wheel drive power and the proportional relation of rear wheel drive power have improved the stationarity of building machinery work such as wheeled asphalt paver.
Claims (3)
1, a kind of paver front-wheel drive hydraulic circuit, comprise fuel tank (1), constant pressure variable displacement pump (2), front-wheel driving motors (4,5), two logical control valves (6), fuel tank (1) respectively with constant pressure variable displacement pump (2), front-wheel driving motors (4,5), two logical control valves (6) are connected, constant pressure variable displacement pump (2) and front-wheel driving motors (4 in parallel, 5) be connected, two logical control valves (6) are connected with constant pressure variable displacement pump (2) through the control port (7) of constant pressure variable displacement pump (2), it is characterized in that: electric proportional control overflow valve (8) one ends are connected with constant pressure variable displacement pump (2) through the control port (7) of constant pressure variable displacement pump (2), and the other end is connected with fuel tank (1).
2, according to the described paver front-wheel drive of claim 1 hydraulic circuit, it is characterized in that: constant pressure variable displacement pump (2) and front-wheel driving motors are connected with motor operations control valve (3) between (4,5).
3, according to the described paver front-wheel drive of claim 2 hydraulic circuit, it is characterized in that: signal amplifying apparatus (9) is connected with electric proportional control overflow valve (8) and pressure sensitive device (10) respectively, and pressure sensitive device (10) contacts with the pressure hydraulic fluid port (11) of rear wheel drive hydraulic circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420034886 CN2673931Y (en) | 2004-01-15 | 2004-01-15 | Hydraulic loop for driving front wheel of spreading machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420034886 CN2673931Y (en) | 2004-01-15 | 2004-01-15 | Hydraulic loop for driving front wheel of spreading machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2673931Y true CN2673931Y (en) | 2005-01-26 |
Family
ID=34483868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420034886 Expired - Lifetime CN2673931Y (en) | 2004-01-15 | 2004-01-15 | Hydraulic loop for driving front wheel of spreading machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2673931Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899808A (en) * | 2009-05-25 | 2010-12-01 | 约瑟夫福格勒公司 | Paver and method |
| WO2011057498A1 (en) * | 2009-11-10 | 2011-05-19 | 湖南三一智能控制设备有限公司 | Front wheel drive control system and method for controlling tire spreading machine and tire spreading machine |
| CN102822420A (en) * | 2010-04-14 | 2012-12-12 | 宝马格有限公司 | Front drive of a road paver and a method for controlling the front drive |
-
2004
- 2004-01-15 CN CN 200420034886 patent/CN2673931Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899808A (en) * | 2009-05-25 | 2010-12-01 | 约瑟夫福格勒公司 | Paver and method |
| CN101899808B (en) * | 2009-05-25 | 2012-08-08 | 约瑟夫福格勒公司 | Road finisher and method |
| WO2011057498A1 (en) * | 2009-11-10 | 2011-05-19 | 湖南三一智能控制设备有限公司 | Front wheel drive control system and method for controlling tire spreading machine and tire spreading machine |
| CN102822420A (en) * | 2010-04-14 | 2012-12-12 | 宝马格有限公司 | Front drive of a road paver and a method for controlling the front drive |
| CN102822420B (en) * | 2010-04-14 | 2015-03-25 | 宝马格有限公司 | Front drive of a road paver and a method for controlling the front drive |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104554432B (en) | Engineering machine steer-by-wire system | |
| CN102996536B (en) | Load sensitive hydraulic system and power controller thereof as well as crane | |
| CN201685704U (en) | Electric forklift hydraulic device used with single power source | |
| CN1821574A (en) | Low idling energy consumption hydraulic power source | |
| CN101182702A (en) | Tire road roller energy-saving control system | |
| CN107489671B (en) | Hybrid power engineering machinery multi executors control system | |
| CN2673931Y (en) | Hydraulic loop for driving front wheel of spreading machine | |
| CN100406649C (en) | Control method and apparatus for omnirange stepless speed-adjusting travel drive of milling machine | |
| CN102601863A (en) | Mixing drum rotation speed control system, concrete mixing vehicle and concrete mixing pump truck | |
| CN113153843A (en) | Double-pump confluence paver load-sensitive hydraulic system and control method thereof | |
| CN202879244U (en) | Closed type hydraulic system for controlling running of vehicle, as well as vehicle | |
| CN203199027U (en) | Hydraulic transmission system of full-hydraulic drive crawler-type tractor | |
| CN108757651A (en) | Electri forklift and its hydraulic control system | |
| CN208595123U (en) | Electri forklift and its hydraulic control system | |
| CN2858744Y (en) | Poleless speed regulation driving device for whole course of milling machine | |
| CN208565099U (en) | It is a kind of to turn to preferential equipment for plant protection hydraulic system and fog machine | |
| CN103711172B (en) | The quantitative combining hydraulic system of loader four pump | |
| CN215944294U (en) | Front wheel driving system and paver | |
| CN202944206U (en) | Double-steel-wheel road roller anti-slip system | |
| CN201633539U (en) | Hydraulic drive remote control tractor | |
| CN203488486U (en) | Electronic-hydraulic system of self-propelled turning machine | |
| CN205225901U (en) | Laser leveling machine hydraulic drive control system | |
| CN205154780U (en) | Oil pump constant speed control system | |
| CN107503997A (en) | Back pressure and the double actuator systems of power matching hydraulic hybrid regulation and control | |
| CN205001267U (en) | Quiet hydraulic drive system and walking vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140115 Granted publication date: 20050126 |