CN109026866A - A kind of hydrostatic walking loop brake release system of road roller and control method - Google Patents
A kind of hydrostatic walking loop brake release system of road roller and control method Download PDFInfo
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- CN109026866A CN109026866A CN201811175360.XA CN201811175360A CN109026866A CN 109026866 A CN109026866 A CN 109026866A CN 201811175360 A CN201811175360 A CN 201811175360A CN 109026866 A CN109026866 A CN 109026866A
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- brake
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- 230000002706 hydrostatic effect Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000002828 fuel tank Substances 0.000 claims abstract description 31
- 230000005611 electricity Effects 0.000 claims abstract description 25
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 11
- 230000000630 rising effect Effects 0.000 claims description 10
- 239000000446 fuel Substances 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 description 28
- 230000007423 decrease Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/26—Supply reservoir or sump assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Control Of Fluid Gearings (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses a kind of hydrostatic walking loop brake release system of road roller and control method, system includes fuel tank, filter, hydraulic pump, electric proportional hydraulic motor, controller, manipulation device, valve group, hydraulic power unit, oil cylinder group and brake；Hydraulic pump is through filter from fuel tank oil suction, hydraulic pump hydraulic fluid port A, B are connected with electric proportional hydraulic motor hydraulic fluid port D, C respectively, constitute hydrostatic walking closed circuit, the E mouth of valve group is connect with the G of hydraulic pump mouth, the F mouth of valve group is connect with fuel tank, the H mouth of valve group is connect with hydraulic power unit, and the L mouth of valve group is connect with brake, and the K mouth of valve group is connect with oil cylinder group；Hydraulic power unit includes valve, motor, hydraulic pump；The motor is connect with hydraulic pump, for driving hydraulic pump works；The valve group, valve, the mechanical, electrical proportional hydraulic motor of electricity are connect with controller, and controller is connect with manipulation device, is operated by manipulation device.
Description
Technical field
The present invention relates to a kind of hydrostatic walking loop brake release system of road roller and control methods, belong to compacting machinary
Technical field.
Background technique
Existing fluid power system, hydraulic pump through filter from fuel tank draw oil liquid, hydraulic pump and hydraulic motor structure
At hydrostatic closed circuit, hydraulic pump provides pressure oil to brake through brake valve and hand-operated valve by internal slippage pump, manually
It pumps both ends and connects check valve, and is in parallel with brake valve, hand-operated valve, brake is mounted on the output device of hydraulic motor, braking
Valve must be electric after starting engine, and right position work can thus release braking.There is event when encountering engine or hydraulic circuit etc.
Barrier when needing trailer, need to manipulate hand-operated valve through professional, cut off the oil sources circuit that hydraulic pump provides, and will be inside hydraulic pump
Shut-off valve open, manipulate handlance, can release braking, such operating procedure bothers, need professional to hydraulic pump into
Row adjustment, just can be with trailer.
Using the road roller of hydrostatic technology, trailer is extremely troublesome, and professional technician is needed to instruct, by cutting on hydraulic pump
Only valve is opened, and connection rubber tube is opened brake with handlance, can carry out trailer.It is not only easy to seep hydraulic oil in this way
Leakage, and the state of hydraulic pump is adjusted, it also needs to restore again, if without configuring corresponding handlance on road roller,
It also needs to buy again.
Summary of the invention
Purpose: in order to overcome the deficiencies in the prior art, the present invention provides a kind of hydrostatic walking loop of road roller
Brake release system and control method.
Technical solution: in order to solve the above technical problems, the technical solution adopted by the present invention are as follows:
A kind of hydrostatic walking loop brake release system of road roller, including fuel tank, filter, hydraulic pump, electric proportional hydraulic horse
It reaches, controller, manipulation device, valve group, hydraulic power unit, oil cylinder group and brake；
Through filter from fuel tank oil suction, hydraulic pump hydraulic fluid port A, B's hydraulic pump are connected with electric proportional hydraulic motor hydraulic fluid port D, C respectively,
Hydrostatic walking closed circuit is constituted, the E mouth of valve group is connect with the G of hydraulic pump mouth, and the F mouth of valve group is connect with fuel tank, the H of valve group
Mouth is connect with hydraulic power unit, and the L mouth of valve group is connect with brake, and the K mouth of valve group is connect with oil cylinder group；
The hydraulic power unit includes valve, motor, hydraulic pump；The motor is connect with hydraulic pump, for driving hydraulic pump works；
The valve group, valve, the mechanical, electrical proportional hydraulic motor of electricity are connect with controller, and controller is connect with manipulation device, passes through behaviour
Vertical device is operated.
As a specific implementation preferred embodiment, the valve group 7 is by two-position three-way valve 71,2/2-way valve 72, two-bit triplet
Valve 73 forms.
As another specific implementation preferred embodiment, the valve group is by two position four-way valves 74 and a two-position three-way valve 73
Composition.
Preferably, the hydrostatic walking loop brake release system of the road roller, it is characterised in that: the liquid
Press pump station further includes manual pump, for releasing braking manually.
Further, the hydrostatic walking loop brake release system of the road roller, it is characterised in that: the electricity ratio
The discharge capacity default of hydraulic motor is zero delivery.
Further, the hydrostatic walking loop brake release system of the road roller, it is characterised in that: the manipulation dress
It sets and is provided with gear button, walking handle, parking button, danger button, rising button, declines button, trailer button.
The present invention also provides the control method of the hydrostatic walking loop brake release system of the road roller, feature exists
In,
When trailer: pressing the trailer button on manipulation device 6, controller 5 makes the two-position three-way valve 71 in valve group 7 and two two
Port valve 72 must be electric, and two-position three-way valve 73 must not be electric, and the electric default of proportional hydraulic motor 4 is in zero-displacement condition, while controller 5 makes
The motor 83 obtained in hydraulic power unit 8 works, and motor 83 drives hydraulic pump 84 to work, and the high pressure oil that hydraulic power unit 8 comes out is through valve group 7
In the right bit stream of two-position three-way valve 71 to brake 10, release braking, can trailer；
Or, when trailer: the trailer button on manipulation device 6 is pressed, it is electric that controller 5 obtains two position four-way valves 74 in valve group 7,
Two-position three-way valve 73 must not be electric, and the electric default of proportional hydraulic motor 4 is in zero-displacement condition, while controller 5 makes hydraulic power unit 8
In motor 83 work, motor 83 drive hydraulic pump 84 work, hydraulic power unit 8 come out high pressure oil through two four in valve group 7
The right bit stream of port valve 74 releases braking to brake 10, can trailer.Using the present invention, trailer button is pressed, it can be to road roller
Carry out trailer operation.
When normal work: after engine start, controller 5 makes two-position three-way valve 71 and 2/2-way valve 72 in valve group 7
Must not be electric, two-position three-way valve 73 must be electric, and 73 working position of two-position three-way valve is right position, and G mouth of the oil liquid through hydraulic pump 3 is through in valve group 7
The right position of two-position three-way valve 73 and 72 left position of 2/2-way valve flow to brake 10, release braking, pass through 6 middle gear of manipulation device
Button, via controller 5 make electric proportional hydraulic motor 4 reach setting discharge capacity, pass through the walking handle in manipulation device 6, hydrostatic
Press running gear work, road roller normal walking；
When road roller parking braking, the parking button on manipulation device 6 is pressed, controller 5 makes the two-position three-way valve in valve group 7
71,73 and 2/2-way valve 72 must not electricity, brake 10 is connected to through valve group 7 with fuel tank 1,10 locking electricity proportional hydraulic horse of brake
Up to 4 output device；
When road roller emergency braking, the danger button on manipulation device 6 is pressed, controller 5 makes the two-position three-way valve in valve group 7
71,73 and 2/2-way valve 72 must not electricity, brake 10 is connected to through valve group 7 with fuel tank 1,10 locking electricity proportional hydraulic horse of brake
Up to 4 output device, the emergency braking in walking is realized；
When hood needs to rise, the rising button on manipulation device 6 is pressed, controller 5 makes 83 work of motor in hydraulic power unit 8
Make, motor 83 drives hydraulic pump 84 to rise hood through 71 left position of two-position three-way valve in valve group 7 to 9 fuel feeding of oil cylinder group；Machine
When cover decline, the declines button on manipulation device 6 is pressed, controller 5 makes the valve 82 in hydraulic power unit 8 work, and oil cylinder group 9 passes through
71 left position of two-position three-way valve and valve 82 in valve group 7 connect fuel tank in hydraulic power unit and slowly decline by hood gravity；
Or, when working normally: after engine start, controller 5 keeps two position four-way valves 74 in valve group 7 electric, two-bit triplet
Valve 73 must be electric, and 73 working position of two-position three-way valve is right position, and G mouth of the oil liquid through hydraulic pump 3 is right through the two-position three-way valve 73 in valve group 7
Position and two position four-way valves, 74 left position flow to brake 10, release braking, by 6 middle gear button of manipulation device, via controller 5 makes
It obtains electric proportional hydraulic motor 4 and reaches setting discharge capacity, by the walking handle in manipulation device 6, hydrostatic running gear work, pressure
Road machine normal walking；
When road roller parking braking, the parking button on manipulation device 6 is pressed, controller 5 makes the two-position three-way valve 73 in valve group 7
Must not be electric with two position four-way valves 74, brake 10 is connected to through valve group 7 with fuel tank 1,10 locking electricity proportional hydraulic motor 4 of brake
Output device；
When road roller emergency braking, the danger button on manipulation device 6 is pressed, controller 5 makes the two-position three-way valve 73 in valve group 7
Must not be electric with two position four-way valves 74, brake 10 is connected to through valve group 7 with fuel tank 1,10 locking electricity proportional hydraulic motor 4 of brake
Output device realizes the emergency braking in walking；
When hood needs to rise, the rising button on manipulation device 6 is pressed, controller 5 makes 83 work of motor in hydraulic power unit 8
Make, motor 83 drives hydraulic pump 84 to rise hood through two position four-way valves, 74 left position in valve group 7 to 9 fuel feeding of oil cylinder group；Machine
When cover decline, the declines button on manipulation device 6 is pressed, controller 5 makes the valve 82 in hydraulic power unit 8 work, and oil cylinder group 9 passes through
Two position four-way valves, 74 left position and valve 82 in valve group 7 connect fuel tank in hydraulic power unit and slowly decline by hood gravity.
The utility model has the advantages that the hydrostatic walking loop brake release system of road roller provided by the invention and control method, hydraulic
The hydraulic motor of drive system uses the hydraulic motor of electric proportional control, and braking oil sources is provided by electric hydraulic station, need to only be pressed
Lower trailer button since the discharge capacity default of hydraulic motor is zero delivery, while making electric hydraulic station and braking valve group work, solution
It, can trailer except braking.When trailer, can a key manipulation carry out releasing braking, it is simple and convenient, be not required to professional and manipulate,
And do not have to manually adjust the shut-off valve in hydraulic pump, shut-off valve also needs professional to adjust.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment 1；
Fig. 2 is the structural schematic diagram of valve group in embodiment 2.
In figure: fuel tank 1, filter 2, hydraulic pump 3, electric proportional hydraulic motor 4, controller 5, manipulation device 6, valve group 7, liquid
Press pump station 8, manual pump 81, valve 82, motor 83, hydraulic pump 84, oil cylinder group 9, brake 10.
Specific embodiment
The present invention will be further explained combined with specific embodiments below.
Embodiment 1
As shown in Figure 1, a kind of hydrostatic walking loop brake release system of road roller, including fuel tank 1, filter 2, hydraulic pump 3,
Electric proportional hydraulic motor 4, controller 5, manipulation device 6, valve group 7, hydraulic power unit 8, oil cylinder group 9 and brake 10.
Hydraulic pump 3 through filter 2 from 1 oil suction of fuel tank, hydraulic pump 3 hydraulic fluid port A, B respectively with electric 4 hydraulic fluid port D of proportional hydraulic motor,
C is connected, and constitutes hydrostatic walking closed circuit, and the E mouth of valve group 7 is connect with the G of hydraulic pump 3 mouth, the F mouth and fuel tank 1 of valve group 7
Connection, the H mouth of valve group 7 are connect with hydraulic power unit 8, and the L mouth of valve group 7 is connect with brake 10, and the K mouth and oil cylinder group 9 of valve group 7 connect
It connects.
The hydraulic power unit 8 includes manual pump 81, valve 82, motor 83, hydraulic pump 84；
7 motor 83 of valve group, valve 82, electric proportional hydraulic motor 4 are connect with controller 5, and controller 5 and manipulation device 6 connect
It connects, is operated by manipulation device 6, gear button, walking handle, parking button, urgent is provided on the manipulation device 6
Button, rising button, declines button, trailer button.
In the present embodiment, the valve group 7 includes two-position three-way valve 71,2/2-way valve 72, two-position three-way valve 73；
Specific embodiment:
When normal work: after engine start, controller 5 makes two-position three-way valve 71 and 2/2-way valve 72 in valve group 7 must not
Electricity, two-position three-way valve 73 must be electric, and 73 working position of two-position three-way valve is right position, and G mouth of the oil liquid through hydraulic pump 3 is through two in valve group 7
The right position of position three-way valve 73 and 72 left position of 2/2-way valve flow to brake 10, release braking, are pressed by 6 middle gear of manipulation device
Button, via controller 5 make electric proportional hydraulic motor 4 reach setting discharge capacity, hydrostatic by the walking handle in manipulation device 6
Running gear work, road roller normal walking.When road roller parking braking, the parking button on manipulation device 6, controller are pressed
5 make two-position three-way valve 71,73 and 2/2-way valve 72 in valve group 7 must not be electric, and brake 10 is connected to through valve group 7 with fuel tank 1, is made
The output device of dynamic 10 locking electricity proportional hydraulic motor 4 of device；When road roller emergency braking, press on manipulation device 6 it is urgent by
Button, controller 5 make two-position three-way valve 71,73 and 2/2-way valve 72 in valve group 7 must not be electric, and brake 10 is through valve group 7 and oil
Case 1 is connected to, the output device of 10 locking electricity proportional hydraulic motor 4 of brake, realizes the emergency braking in walking；When hood needs
When rising, the rising button on manipulation device 6 is pressed, controller 5 makes the motor 83 in hydraulic power unit 8 work, and motor 83 drives
Hydraulic pump 84 rises hood through 71 left position of two-position three-way valve in valve group 7 to 9 fuel feeding of oil cylinder group；When hood declines, press
Declines button on manipulation device 6, controller 5 make the valve 82 in hydraulic power unit 8 work, and oil cylinder group 9 is through two in valve group 7
71 left position of triple valve and valve 82 connect fuel tank in hydraulic power unit and slowly decline by hood gravity.
When trailer: pressing the trailer button on manipulation device 6, controller 5 makes the two-position three-way valve 71 and two in valve group 7
Position two-way valve 72 it is electric, two-position three-way valve 73 must not electricity, electric proportional hydraulic motor 4 default is in zero-displacement condition, controls simultaneously
Device 5 makes the motor 83 in hydraulic power unit 8 work, and motor 83 drives hydraulic pump 84 to work, the high pressure oil warp that hydraulic power unit 8 comes out
The right bit stream of two-position three-way valve 71 in valve group 7 releases braking to brake 10, can trailer, at electric proportional hydraulic motor 4
It is not in counter drag in zero delivery.It, at this time can be manually by the two-position three-way valve in valve group 7 if power supply of the whole machine also breaks down
71 and 72 working position of 2/2-way valve become right position, and manipulate the manual pump 81 on hydraulic power unit 8, braking can be released manually,
Electric proportional hydraulic motor 4 is in zero delivery, is not in counter drag.
Embodiment 2
With valve group 7 in 7 alternate embodiments of valve group in Fig. 2, specific embodiment is consistent.
In the present embodiment, two-position three-way valve 71 and 2/2-way valve 72 in embodiment 1 are replaced with two position four-way valves 74
Combination, valve group 7 is made of two position four-way valves 74 and two-position three-way valve 73.
Specific embodiment:
When normal work: after engine start, controller 5 keeps two position four-way valves 74 in valve group 7 electric, two-position three-way valve 73
It is electric, 73 working position of two-position three-way valve be right position, G mouth of the oil liquid through hydraulic pump 3 through in valve group 7 the right position of two-position three-way valve 73 with
Two position four-way valves, 74 left position flows to brake 10, releases braking, by 6 middle gear button of manipulation device, via controller 5 makes electricity
Proportional hydraulic motor 4 reaches setting discharge capacity, by the walking handle in manipulation device 6, hydrostatic running gear work, and road roller
Normal walking.When road roller parking braking, the parking button on manipulation device 6 is pressed, controller 5 makes two three in valve group 7
Port valve 73 and two position four-way valves 74 must not be electric, and brake 10 is connected to through valve group 7 with fuel tank 1,10 locking electricity proportional hydraulic of brake
The output device of motor 4；When road roller emergency braking, the danger button on manipulation device 6 is pressed, controller 5 makes in valve group 7
Two-position three-way valve 73 and two position four-way valves 74 must not be electric, and brake 10 is connected to through valve group 7 with fuel tank 1,10 locking electricity ratio of brake
The output device of example hydraulic motor 4, realizes the emergency braking in walking；When hood needs to rise, press on manipulation device 6
Rising button, controller 5 make the motor 83 in hydraulic power unit 8 work, and motor 83 drives hydraulic pump 84, through two in valve group 7
Hood is risen to 9 fuel feeding of oil cylinder group 74 left position of four-way valve；When hood declines, the declines button on manipulation device 6 is pressed, is controlled
Device 5 processed makes the valve 82 in hydraulic power unit 8 work, oil cylinder group 9 through in valve group 7 two position four-way valves, 74 left position and valve 82 connect liquid
Fuel tank in press pump station slowly declines by hood gravity.
When trailer: pressing the trailer button on manipulation device 6, controller 5 obtains two position four-way valves 74 in valve group 7
Electricity, two-position three-way valve 73 must not be electric, and the electric default of proportional hydraulic motor 4 is in zero-displacement condition, while controller 5 makes hydraulic pump
The motor 83 stood in 8 works, and motor 83 drives hydraulic pump 84 to work, and the high pressure oil that hydraulic power unit 8 comes out is through two in valve group 7
The right bit stream of four-way valve 74 releases braking to brake 10, can trailer will not since electric proportional hydraulic motor 4 is in zero delivery
There is counter drag.If power supply of the whole machine also breaks down, two position four-way valves, 74 working position in valve group 7 can be become right manually at this time
Position, and the manual pump 81 on hydraulic power unit 8 is manipulated, braking can be released manually, and electric proportional hydraulic motor 4 is in zero delivery, no
It will appear counter drag.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (8)
1. a kind of hydrostatic walking loop brake release system of road roller, including fuel tank, filter, hydraulic pump, electric proportional hydraulic
Motor, controller, manipulation device, valve group, hydraulic power unit, oil cylinder group and brake；
Through filter from fuel tank oil suction, hydraulic pump hydraulic fluid port A, B's hydraulic pump are connected with electric proportional hydraulic motor hydraulic fluid port D, C respectively,
Hydrostatic walking closed circuit is constituted, the E mouth of valve group is connect with the G of hydraulic pump mouth, and the F mouth of valve group is connect with fuel tank, the H of valve group
Mouth is connect with hydraulic power unit, and the L mouth of valve group is connect with brake, and the K mouth of valve group is connect with oil cylinder group；
The hydraulic power unit includes valve, motor, hydraulic pump；The motor is connect with hydraulic pump, for driving hydraulic pump works；
The valve group, valve, the mechanical, electrical proportional hydraulic motor of electricity are connect with controller, and controller is connect with manipulation device, passes through behaviour
Vertical device is operated.
2. the hydrostatic walking loop brake release system of road roller according to claim 1, it is characterised in that: the valve group
(7) it is made of two-position three-way valve (71), 2/2-way valve (72), two-position three-way valve (73).
3. the hydrostatic walking loop brake release system of road roller according to claim 1, it is characterised in that: the valve group
(7) it is made of two position four-way valve (74) and a two-position three-way valve (73).
4. the hydrostatic walking loop brake release system of road roller according to claim 1, it is characterised in that: described hydraulic
Pumping plant further includes manual pump, for releasing braking manually.
5. the hydrostatic walking loop brake release system of road roller according to claim 1, it is characterised in that: the electricity ratio
The discharge capacity default of example hydraulic motor is zero delivery.
6. the hydrostatic walking loop brake release system of road roller according to claim 1, it is characterised in that: the manipulation
Gear button, walking handle, parking button, danger button, rising button, declines button, trailer button are provided on device.
7. the control method of the hydrostatic walking loop brake release system of road roller according to claim 1-6,
It is characterized in that,
When trailer: pressing the trailer button on manipulation device (6), controller (5) makes the two-position three-way valve (71) in valve group (7)
Must be electric with 2/2-way valve (72), two-position three-way valve (73) must not be electric, and electric proportional hydraulic motor (4) default is in zero delivery shape
State, while controller (5) makes the motor (83) in hydraulic power unit (8) work, motor (83) drives hydraulic pump (84) work, liquid
The high pressure oil that press pump station (8) comes out to brake (10), releases braking through two-position three-way valve (71) the right bit stream in valve group (7),
It can trailer；
Or, when trailer: pressing the trailer button on manipulation device (6), controller (5) makes two position four-way valves in valve group (7)
(74) must be electric, two-position three-way valve (73) must not be electric, and electric proportional hydraulic motor (4) default is in zero-displacement condition, while controller
(5) motor (83) in hydraulic power unit (8) is made to work, motor (83) drives hydraulic pump (84) work, and hydraulic power unit (8) comes out
High pressure oil through two position four-way valves (74) the right bit stream in valve group (7) to brake (10), release braking, can trailer.
8. the control method of the hydrostatic walking loop brake release system of road roller according to claim 1-6,
It is characterized in that,
When normal work: after engine start, controller (5) makes two-position three-way valve (71) and 2/2-way valve in valve group (7)
(72) must not be electric, two-position three-way valve (73) must be electric, and two-position three-way valve (73) working position is right position, G mouth of the oil liquid through hydraulic pump (3)
Through in valve group (7) the right position of two-position three-way valve (73) and 2/2-way valve (72) left position flow to brake (10), release braking, lead to
Manipulation device (6) middle gear button is crossed, via controller (5) makes electric proportional hydraulic motor (4) reach setting discharge capacity, passes through manipulation
Walking handle in device (6), hydrostatic running gear work, road roller normal walking；
When road roller parking braking, the parking button on manipulation device (6) is pressed, controller (5) makes two three in valve group (7)
Port valve (71), two-position three-way valve (73) and 2/2-way valve (72) must not be electric, and brake (10) connects through valve group (7) and fuel tank (1)
It is logical, the output device of brake (10) locking electricity proportional hydraulic motor (4)；
When road roller emergency braking, the danger button on manipulation device (6) is pressed, controller (5) makes two three in valve group (7)
Port valve (71), (73) and 2/2-way valve (72) must not be electric, and brake (10) is connected to through valve group (7) with fuel tank (1), brake
(10) output device of locking electricity proportional hydraulic motor (4) realizes the emergency braking in walking；
When hood needs to rise, the rising button on manipulation device (6) is pressed, controller (5) makes the electricity in hydraulic power unit (8)
Machine (83) work, motor (83) drive hydraulic pump (84), through two-position three-way valve (71) left position in valve group (7) to oil cylinder group (9)
Fuel feeding rises hood；When hood declines, the declines button on manipulation device (6) is pressed, controller (5) makes hydraulic power unit
(8) valve 82 in works, and oil cylinder group (9) is through in two-position three-way valve (71) left position and the connection hydraulic power unit of valve 82 in valve group (7)
Fuel tank slowly declines by hood gravity；
Or, when working normally: after engine start, controller (5) keeps two position four-way valves (74) in valve group (7) electric, two
Position three-way valve (73) must be electric, and two-position three-way valve (73) working position is right position, and G mouth of the oil liquid through hydraulic pump (3) is through in valve group (7)
The right position of two-position three-way valve (73) and two position four-way valves (74) left position flow to brake (10), release braking, pass through manipulation device (6)
Middle gear button, via controller (5) make electric proportional hydraulic motor (4) reach setting discharge capacity, pass through the row in manipulation device (6)
Walk handle, hydrostatic running gear work, road roller normal walking；
When road roller parking braking, the parking button on manipulation device (6) is pressed, controller (5) makes two three in valve group (7)
Port valve (73) and two position four-way valves (74) must not be electric, and brake (10) is connected to through valve group (7) with fuel tank (1), and brake (10) is embraced
The output device of dead electricity proportional hydraulic motor (4)；
When road roller emergency braking, the danger button on manipulation device (6) is pressed, controller (5) makes two three in valve group (7)
Port valve (73) and two position four-way valves (74) must not be electric, and brake (10) is connected to through valve group (7) with fuel tank (1), and brake (10) is embraced
The output device of dead electricity proportional hydraulic motor (4), realizes the emergency braking in walking；
When hood needs to rise, the rising button on manipulation device (6) is pressed, controller (5) makes the electricity in hydraulic power unit (8)
Machine (83) work, motor (83) drive hydraulic pump (84), through two position four-way valves (74) left position in valve group (7) to oil cylinder group (9)
Fuel feeding rises hood；When hood declines, the declines button on manipulation device (6) is pressed, controller (5) makes hydraulic power unit
(8) valve 82 in works, and oil cylinder group (9) is through in two position four-way valves (74) left position and the connection hydraulic power unit of valve 82 in valve group (7)
Fuel tank slowly declines by hood gravity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811175360.XA CN109026866B (en) | 2018-10-10 | 2018-10-10 | Braking release system of hydrostatic traveling loop of road roller and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811175360.XA CN109026866B (en) | 2018-10-10 | 2018-10-10 | Braking release system of hydrostatic traveling loop of road roller and control method |
Publications (2)
| Publication Number | Publication Date |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112339725A (en) * | 2020-10-28 | 2021-02-09 | 徐工集团工程机械股份有限公司道路机械分公司 | Auxiliary braking method and system for road roller |
| CN113173147A (en) * | 2021-04-19 | 2021-07-27 | 郑州宇通重工有限公司 | Hybrid brake system and hydraulic drive transportation equipment |
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| CN113173147A (en) * | 2021-04-19 | 2021-07-27 | 郑州宇通重工有限公司 | Hybrid brake system and hydraulic drive transportation equipment |
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| Publication number | Publication date |
|---|---|
| CN109026866B (en) | 2023-11-24 |
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