CN209243808U - A kind of hydraulic crawler excavator multipath hydraulic system - Google Patents
A kind of hydraulic crawler excavator multipath hydraulic system Download PDFInfo
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- CN209243808U CN209243808U CN201821919303.3U CN201821919303U CN209243808U CN 209243808 U CN209243808 U CN 209243808U CN 201821919303 U CN201821919303 U CN 201821919303U CN 209243808 U CN209243808 U CN 209243808U
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- proportioning valve
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- hydraulic system
- pressure sensor
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Abstract
A kind of hydraulic crawler excavator multipath hydraulic system, including controller, oil inlet pipe, oil return pipe, variable pump, boom cylinder hydraulic system, bucket arm cylinder hydraulic system, bucket cylinder hydraulic system, rotary motor hydraulic system and running motor hydraulic system；The outlet of variable pump passes through piping connection oil return pipe by piping connection oil inlet pipe, the import of variable pump；Boom cylinder hydraulic system, bucket arm cylinder hydraulic system, bucket cylinder hydraulic system, rotary motor hydraulic system and running motor hydraulic system are arranged between oil inlet pipe and oil return pipe；The each system of the utility model includes independent overflow valve and proportioning valve, realizes load port independent control, so that control is more flexible；It uses variable pump for executive component simultaneously, the data of sensor is acquired by controller, carry out the flow that timely regulated variable pump is input to system, avoid energy waste, realize Energy Saving Control.
Description
Technical field
The utility model belongs to hydraulic excavating machinery drive area, in particular to a kind of hydraulic crawler excavator multipath hydraulic system
System.
Background technique
The one kind of hydraulic excavating machinery as Maintenance Machinery of building the road, has a wide range of applications field.And existing excavator
The design (calculated) load mouth of hydraulic circuit has the disadvantage in that cannot independent control；It can not achieve the same time control of pressure, flow
System causes the unstability factor of control to increase；And it can not achieve Energy Saving Control.It is higher and higher in energy-saving and environment-friendly cry
Today, energy-saving protective are more important to our life, realize that Energy Saving Control is extremely urgent.
Utility model content
The purpose of this utility model is to provide a kind of hydraulic crawler excavator multipath hydraulic systems, to solve the above problems.
To achieve the above object, the utility model uses following technical scheme:
A kind of hydraulic crawler excavator multipath hydraulic system, including controller, oil inlet pipe, oil return pipe, variable pump, boom cylinder liquid
Pressure system, bucket arm cylinder hydraulic system, bucket cylinder hydraulic system, rotary motor hydraulic system and running motor hydraulic system；
The outlet of variable pump passes through piping connection oil return pipe by piping connection oil inlet pipe, the import of variable pump；Boom cylinder hydraulic pressure system
System, bucket arm cylinder hydraulic system, bucket cylinder hydraulic system, rotary motor hydraulic system and running motor hydraulic system are respectively provided with
Between oil inlet pipe and oil return pipe；
Boom cylinder hydraulic system includes the first proportioning valve, the second proportioning valve and boom cylinder；Oil inlet pipe separate two-way it
Pipeline is separately connected the first entrance of the first proportioning valve and the second proportioning valve, and the first outlet of the first proportioning valve passes through piping connection
The rod chamber of boom cylinder, the first outlet of the second proportioning valve pass through the rodless cavity of piping connection boom cylinder；Second proportioning valve
First outlet and boom cylinder rodless cavity between pipeline and the first outlet of the first proportioning valve and having for boom cylinder
Pipeline between rod cavity is connected to oil return pipe；
Bucket arm cylinder hydraulic system includes the first proportioning valve, the second proportioning valve and bucket arm cylinder；Oil inlet pipe separate two-way it
Pipeline is separately connected the first entrance of the first proportioning valve and the second proportioning valve, and the first outlet of the first proportioning valve passes through piping connection
The rod chamber of bucket arm cylinder, the first outlet of the second proportioning valve pass through the rodless cavity of piping connection bucket arm cylinder；Second proportioning valve
First outlet and bucket arm cylinder rodless cavity between pipeline and the first outlet of the first proportioning valve and having for bucket arm cylinder
Pipeline between rod cavity is connected to oil return pipe；
Bucket cylinder hydraulic system includes the first proportioning valve, the second proportioning valve and bucket cylinder；Oil inlet pipe separate two-way it
Pipeline is separately connected the first entrance of the first proportioning valve and the second proportioning valve, and the first outlet of the first proportioning valve passes through piping connection
The rod chamber of bucket cylinder, the first outlet of the second proportioning valve pass through the rodless cavity of piping connection bucket cylinder；Second proportioning valve
First outlet and bucket cylinder rodless cavity between pipeline and the first outlet of the first proportioning valve and having for bucket cylinder
Pipeline between rod cavity is connected to oil return pipe；
Rotary motor hydraulic system includes the first proportioning valve, the second proportioning valve and rotary motor；Oil inlet pipe separate two-way it
Pipeline is separately connected the first entrance of the first proportioning valve and the second proportioning valve, and the first outlet of the first proportioning valve passes through piping connection
The entrance of rotary motor, the first outlet of the second proportioning valve pass through the outlet of piping connection rotary motor；The of second proportioning valve
Between the first outlet of pipeline and the first proportioning valve and the entrance of rotary motor between one outlet and the outlet of rotary motor
Pipeline be connected to oil return pipe；
Running motor hydraulic system includes the first proportioning valve, the second proportioning valve and running motor；Oil inlet pipe separate two-way it
Pipeline is separately connected the first entrance of the first proportioning valve and the second proportioning valve, and the first outlet of the first proportioning valve passes through piping connection
The entrance of running motor, the first outlet of the second proportioning valve pass through the outlet of piping connection running motor；The of second proportioning valve
Between the first outlet of pipeline and the first proportioning valve and the entrance of running motor between one outlet and the outlet of running motor
Pipeline be connected to oil return pipe；
Controller is used to control the conducting and closing of the first proportioning valve and the second proportioning valve；Variable pump connects controller.
Further, in boom cylinder hydraulic system, first pressure is provided on the pipeline of boom cylinder connection rod chamber
Sensor, boom cylinder connection rodless cavity pipeline on be provided with second pressure sensor；The rodless cavity of boom cylinder and oil return
It is provided with third overflow valve on pipeline between pipe, is provided with second on the pipeline between the rod chamber and oil return pipe of boom cylinder
Overflow valve；First proportioning valve, the second proportioning valve, first pressure sensor, second pressure sensor and third pressure sensor are equal
It is wired to controller.
Further, in bucket arm cylinder hydraulic system, first pressure is provided on the pipeline of bucket arm cylinder connection rod chamber
Sensor, bucket arm cylinder connection rodless cavity pipeline on be provided with second pressure sensor；The rodless cavity of bucket arm cylinder and oil return
It is provided with third overflow valve on pipeline between pipe, is provided with second on the pipeline between the rod chamber and oil return pipe of bucket arm cylinder
Overflow valve；First proportioning valve, the second proportioning valve, first pressure sensor, second pressure sensor and third pressure sensor are equal
It is wired to controller.
Further, in bucket cylinder hydraulic system, first pressure is provided on the pipeline of bucket cylinder connection rod chamber
Sensor, bucket cylinder connection rodless cavity pipeline on be provided with second pressure sensor；The rodless cavity of bucket cylinder and oil return
It is provided with third overflow valve on pipeline between pipe, is provided with second on the pipeline between the rod chamber and oil return pipe of bucket cylinder
Overflow valve；First proportioning valve, the second proportioning valve, first pressure sensor, second pressure sensor and third pressure sensor are equal
It is wired to controller.
Further, in rotary motor hydraulic system, first pressure biography is provided on the pipeline of rotary motor connection entrance
Sensor is provided with second pressure sensor on the pipeline of rotary motor connection outlet；Between the outlet and oil return pipe of rotary motor
Pipeline on be provided with third overflow valve, be provided with the second overflow valve on the pipeline between the entrance and oil return pipe of rotary motor；
First proportioning valve, the second proportioning valve, first pressure sensor, second pressure sensor and third pressure sensor pass through conducting wire
It is connected to controller.
Further, in running motor hydraulic system, first pressure biography is provided on the pipeline of running motor connection entrance
Sensor is provided with second pressure sensor on the pipeline of running motor connection outlet；Between the outlet and oil return pipe of running motor
Pipeline on be provided with third overflow valve, be provided with the second overflow valve on the pipeline between the entrance and oil return pipe of running motor；
First proportioning valve, the second proportioning valve, first pressure sensor, second pressure sensor and third pressure sensor pass through conducting wire
It is connected to controller.
Further, variable pump is connected with engine；The first overflow valve and third are provided on the export pipeline of variable pump
Pressure sensor.
Compared with prior art, the utility model has following technical effect:
The utility model includes boom cylinder hydraulic system, bucket arm cylinder hydraulic system, bucket cylinder hydraulic system, revolution
Motor hydraulic system and running motor hydraulic system, each system include independent overflow valve and proportioning valve, realize that load port is only
Vertical control, so that control is more flexible；It uses variable pump for executive component simultaneously, the data of sensor is acquired by controller,
Carry out the flow that timely regulated variable pump is input to system, avoids energy waste, realize Energy Saving Control.
The utility model can control variable pump and proportioning valve, which has the function of valve control and pump control simultaneously, using pressure
Power control and flow control determine that it passes in and out oil mass according to the stress condition of executive component each in the course of work.
Detailed description of the invention
Fig. 1 is hydraulic crawler excavator system circuit assembly figure.
Fig. 2 is boom cylinder hydraulic circuit figure；
Fig. 3 is bucket arm cylinder hydraulic circuit figure；
Fig. 4 is bucket cylinder hydraulic circuit figure；
Fig. 5 is rotary motor hydraulic circuit figure；
Fig. 6 is running motor hydraulic circuit figure；
Wherein: 1, variable pump；2, engine；3, the first overflow valve；6, the second overflow valve；12, third overflow valve；4, it controls
Device；5, third pressure sensor；7, first pressure sensor；8, second pressure sensor；9, the first proportioning valve；11, the second ratio
Example valve.
Specific embodiment
Below in conjunction with attached drawing, the present invention will be further described:
Please refer to Fig. 1 to Fig. 6, a kind of hydraulic crawler excavator multipath hydraulic system, including controller 4, oil inlet pipe, oil return pipe,
Variable pump 1, boom cylinder hydraulic system, bucket arm cylinder hydraulic system, bucket cylinder hydraulic system, rotary motor hydraulic system and
Running motor hydraulic system；The outlet of variable pump 1 is returned by piping connection oil inlet pipe, the import of variable pump 1 by piping connection
Oil pipe；Boom cylinder hydraulic system, bucket arm cylinder hydraulic system, bucket cylinder hydraulic system, rotary motor hydraulic system and row
Motor hydraulic system is walked to be arranged between oil inlet pipe and oil return pipe；
Boom cylinder hydraulic system includes the first proportioning valve 9, the second proportioning valve 11 and boom cylinder 10；Oil inlet pipe separates two
The pipeline on road is separately connected the first entrance of the first proportioning valve 9 and the second proportioning valve 11, and the first outlet of the first proportioning valve 9 passes through
The rod chamber of piping connection boom cylinder 10, the first outlet of the second proportioning valve 11 is by piping connection boom cylinder 10 without bar
Chamber；First of pipeline and the first proportioning valve 9 between the first outlet of second proportioning valve 11 and the rodless cavity of boom cylinder 10
Outlet is connected to oil return pipe with the pipeline between the rod chamber of boom cylinder 10；
Bucket arm cylinder hydraulic system includes the first proportioning valve 9, the second proportioning valve 11 and bucket arm cylinder 15；Oil inlet pipe separates two
The pipeline on road is separately connected the first entrance of the first proportioning valve 9 and the second proportioning valve 11, and the first outlet of the first proportioning valve 9 passes through
The rod chamber of piping connection bucket arm cylinder 15, the first outlet of the second proportioning valve 11 is by piping connection bucket arm cylinder 15 without bar
Chamber；First of pipeline and the first proportioning valve 9 between the first outlet of second proportioning valve 11 and the rodless cavity of bucket arm cylinder 15
Outlet is connected to oil return pipe with the pipeline between the rod chamber of bucket arm cylinder 15；
Bucket cylinder hydraulic system includes the first proportioning valve 9, the second proportioning valve 11 and bucket cylinder 16；Oil inlet pipe separates two
The pipeline on road is separately connected the first entrance of the first proportioning valve 9 and the second proportioning valve 11, and the first outlet of the first proportioning valve 9 passes through
The rod chamber of piping connection bucket cylinder 16, the first outlet of the second proportioning valve 11 is by piping connection bucket cylinder 16 without bar
Chamber；First of pipeline and the first proportioning valve 9 between the first outlet of second proportioning valve 11 and the rodless cavity of bucket cylinder 16
Outlet is connected to oil return pipe with the pipeline between the rod chamber of bucket cylinder 16；
Rotary motor hydraulic system includes the first proportioning valve 9, the second proportioning valve 11 and rotary motor 17；Oil inlet pipe separates two
The pipeline on road is separately connected the first entrance of the first proportioning valve 9 and the second proportioning valve 11, and the first outlet of the first proportioning valve 9 passes through
The entrance of piping connection rotary motor 17, the first outlet of the second proportioning valve 11 pass through the outlet of piping connection rotary motor 17；
The first outlet of pipeline and the first proportioning valve 9 between the first outlet of second proportioning valve 11 and the outlet of rotary motor 17
Pipeline between the entrance of rotary motor 17 is connected to oil return pipe；
Running motor hydraulic system includes the first proportioning valve 9, the second proportioning valve 11 and running motor 18；Oil inlet pipe separates two
The pipeline on road is separately connected the first entrance of the first proportioning valve 9 and the second proportioning valve 11, and the first outlet of the first proportioning valve 9 passes through
The entrance of piping connection running motor 18, the first outlet of the second proportioning valve 11 pass through the outlet of piping connection running motor 18；
The first outlet of pipeline and the first proportioning valve 9 between the first outlet of second proportioning valve 11 and the outlet of running motor 18
Pipeline between the entrance of running motor 18 is connected to oil return pipe；
Controller 4 is used to control the conducting and closing of the first proportioning valve 9 and the second proportioning valve 11；The connection control of variable pump 1
Device 4.
In boom cylinder hydraulic system, it is provided with first pressure sensor 7 on the pipeline of the connection rod chamber of boom cylinder 10,
Second pressure sensor 8 is provided on the pipeline of the connection rodless cavity of boom cylinder 10；The rodless cavity and oil return pipe of boom cylinder 10
Between pipeline on be provided with third overflow valve 12, is provided on the pipeline between the rod chamber and oil return pipe of boom cylinder 10
Two overflow valves 6；First proportioning valve 9, the second proportioning valve 11, first pressure sensor 7, second pressure sensor 8 and third pressure
Sensor 5 is wired to controller 4.
In bucket arm cylinder hydraulic system, it is provided with first pressure sensor 7 on the pipeline of the connection rod chamber of bucket arm cylinder 15,
Second pressure sensor 8 is provided on the pipeline of the connection rodless cavity of bucket arm cylinder 15；The rodless cavity and oil return pipe of bucket arm cylinder 15
Between pipeline on be provided with third overflow valve 12, is provided on the pipeline between the rod chamber and oil return pipe of bucket arm cylinder 15
Two overflow valves 6；First proportioning valve 9, the second proportioning valve 11, first pressure sensor 7, second pressure sensor 8 and third pressure
Sensor 5 is wired to controller 4.
In bucket cylinder hydraulic system, it is provided with first pressure sensor 7 on the pipeline of the connection rod chamber of bucket cylinder 16,
Second pressure sensor 8 is provided on the pipeline of the connection rodless cavity of bucket cylinder 16；The rodless cavity and oil return pipe of bucket cylinder 16
Between pipeline on be provided with third overflow valve 12, is provided on the pipeline between the rod chamber and oil return pipe of bucket cylinder 16
Two overflow valves 6；First proportioning valve 9, the second proportioning valve 11, first pressure sensor 7, second pressure sensor 8 and third pressure
Sensor 5 is wired to controller 4.
In rotary motor hydraulic system, it is provided with first pressure sensor 7 on the pipeline of the connection entrance of rotary motor 17, is returned
Turn to be provided with second pressure sensor 8 on the pipeline of 17 connection outlet of motor；Between the outlet and oil return pipe of rotary motor 17
It is provided with third overflow valve 12 on pipeline, is provided with the second overflow valve on the pipeline between the entrance and oil return pipe of rotary motor 17
6；First proportioning valve 9, the second proportioning valve 11, first pressure sensor 7, second pressure sensor 8 and third pressure sensor 5 are equal
It is wired to controller 4.
In running motor hydraulic system, it is provided with first pressure sensor 7 on the pipeline of the connection entrance of running motor 18, row
It walks and is provided with second pressure sensor 8 on the pipeline of 18 connection outlet of motor；Between the outlet and oil return pipe of running motor 18
It is provided with third overflow valve 12 on pipeline, is provided with the second overflow valve on the pipeline between the entrance and oil return pipe of running motor 18
6；First proportioning valve 9, the second proportioning valve 11, first pressure sensor 7, second pressure sensor 8 and third pressure sensor 5 are equal
It is wired to controller 4.
Variable pump 1 is connected with engine 2；It is provided with the first overflow valve 3 on the export pipeline of variable pump 1 and third pressure passes
Sensor 5.
As shown in Fig. 2, the specific working principle is as follows；
(1) swing arm lifts
Start engine 2, driving variable pump 1 inputs high pressure oil to major loop；Operator issues on swing arm 10 to controller 4
Signal is risen, controller 4 judges according to signal, control signal is issued to proportioning valve 9,11, so that proportioning valve 9 is in right position closure,
Proportioning valve 11 is in left position conducting, swing arm cylinder rodless cavity oil inlet, and swing arm lifting is realized in swing arm cylinder rod chamber oil return.It controls simultaneously
Device adjusts proportioning valve 9,11 spool positions according to pressure sensor 7,8 feedback signals, the control signal of export ratio valve 9,11,
Meet requirement of the boom cylinder load to the circuit pressure, flow.
(2) swing arm declines
Operator issues 10 dropping signal of boom cylinder to controller 4, and controller 4 is judged according to signal, to ratio
Valve 9,11 issue control signal so that proportioning valve 9 be in left position conducting, proportioning valve 11 be in right position be closed, swing arm rod chamber into
Oil, swing arm cylinder rodless cavity oil return；Controller is according to pressure sensor 7,8 feedback signals, the control of export ratio valve 9,11 simultaneously
Signal adjusts proportioning valve 9,10 spool positions, meets requirement of the boom cylinder load to the circuit pressure, flow.
Pressure sensor 5 monitors major loop pressure signal and feeds back to controller 4, and controller judges feedback signal.Control becomes
Amount structure carrys out the output flow of regulated variable pump, reduces flow loss, realizes Energy Saving Control.
Overflow valve 3,6,12 plays pressure stabilizing, overflow, safeguard protection.
The model REXROTH/ Rexroth A10VSO of variable pump；
The abundant emerging power ZH4102Y of the model of engine；
The model REXROTH/ Rexroth EX200-2 of overflow valve；
The model Caterpillar/ Caterpillar 336d of controller；
Pressure sensor model is HITACHI/ Hitachi 4436535；
Proportioning valve model tall building work XG150.
Claims (7)
1. a kind of hydraulic crawler excavator multipath hydraulic system, which is characterized in that including controller (4), oil inlet pipe, oil return pipe, variable
Pump (1), boom cylinder hydraulic system, bucket arm cylinder hydraulic system, bucket cylinder hydraulic system, rotary motor hydraulic system and row
Walk motor hydraulic system；The outlet of variable pump (1) passes through piping connection by piping connection oil inlet pipe, the import of variable pump (1)
Oil return pipe；Boom cylinder hydraulic system, bucket arm cylinder hydraulic system, bucket cylinder hydraulic system, rotary motor hydraulic system and
Running motor hydraulic system is arranged between oil inlet pipe and oil return pipe；
Boom cylinder hydraulic system includes the first proportioning valve (9), the second proportioning valve (11) and boom cylinder (10)；Oil inlet pipe separates
The pipeline of two-way is separately connected the first entrance of the first proportioning valve (9) and the second proportioning valve (11), and the first of the first proportioning valve (9)
Outlet passes through the rod chamber of piping connection boom cylinder (10), and the first outlet of the second proportioning valve (11) passes through piping connection swing arm
The rodless cavity of oil cylinder (10)；Pipeline between the first outlet of second proportioning valve (11) and the rodless cavity of boom cylinder (10), with
And first the first outlet of proportioning valve (9) be connected to oil return pipe with the pipeline between the rod chamber of boom cylinder (10)；
Bucket arm cylinder hydraulic system includes the first proportioning valve (9), the second proportioning valve (11) and bucket arm cylinder (15)；Oil inlet pipe separates
The pipeline of two-way is separately connected the first entrance of the first proportioning valve (9) and the second proportioning valve (11), and the first of the first proportioning valve (9)
Outlet passes through the rod chamber of piping connection bucket arm cylinder (15), and the first outlet of the second proportioning valve (11) passes through piping connection dipper
The rodless cavity of oil cylinder (15)；Pipeline between the first outlet of second proportioning valve (11) and the rodless cavity of bucket arm cylinder (15), with
And first the first outlet of proportioning valve (9) be connected to oil return pipe with the pipeline between the rod chamber of bucket arm cylinder (15)；
Bucket cylinder hydraulic system includes the first proportioning valve (9), the second proportioning valve (11) and bucket cylinder (16)；Oil inlet pipe separates
The pipeline of two-way is separately connected the first entrance of the first proportioning valve (9) and the second proportioning valve (11), and the first of the first proportioning valve (9)
Outlet passes through the rod chamber of piping connection bucket cylinder (16), and the first outlet of the second proportioning valve (11) passes through piping connection scraper bowl
The rodless cavity of oil cylinder (16)；Pipeline between the first outlet of second proportioning valve (11) and the rodless cavity of bucket cylinder (16), with
And first the first outlet of proportioning valve (9) be connected to oil return pipe with the pipeline between the rod chamber of bucket cylinder (16)；
Rotary motor hydraulic system includes the first proportioning valve (9), the second proportioning valve (11) and rotary motor (17)；Oil inlet pipe separates
The pipeline of two-way is separately connected the first entrance of the first proportioning valve (9) and the second proportioning valve (11), and the first of the first proportioning valve (9)
Outlet passes through the entrance of piping connection rotary motor (17), and the first outlet of the second proportioning valve (11) turns round horse by piping connection
Up to the outlet of (17)；Pipeline and first between the first outlet of second proportioning valve (11) and the outlet of rotary motor (17)
Pipeline between the first outlet of proportioning valve (9) and the entrance of rotary motor (17) is connected to oil return pipe；
Running motor hydraulic system includes the first proportioning valve (9), the second proportioning valve (11) and running motor (18)；Oil inlet pipe separates
The pipeline of two-way is separately connected the first entrance of the first proportioning valve (9) and the second proportioning valve (11), and the first of the first proportioning valve (9)
By the entrance of piping connection running motor (18), the first outlet of the second proportioning valve (11) is walked horse by piping connection for outlet
Up to the outlet of (18)；Pipeline and first between the first outlet of second proportioning valve (11) and the outlet of running motor (18)
Pipeline between the first outlet of proportioning valve (9) and the entrance of running motor (18) is connected to oil return pipe；
Controller (4) is used to control the conducting and closing of the first proportioning valve (9) and the second proportioning valve (11)；Variable pump (1) connection
Controller (4).
2. a kind of hydraulic crawler excavator multipath hydraulic system according to claim 1, which is characterized in that boom cylinder hydraulic pressure system
In system, it is provided with first pressure sensor (7) on the pipeline of boom cylinder (10) connection rod chamber, boom cylinder (10) connects nothing
Second pressure sensor (8) are provided on the pipeline of rod cavity；On pipeline between the rodless cavity and oil return pipe of boom cylinder (10)
It is provided with third overflow valve (12), is provided with the second overflow valve on the pipeline between the rod chamber and oil return pipe of boom cylinder (10)
(6)；First proportioning valve (9), the second proportioning valve (11), first pressure sensor (7), second pressure sensor (8) and third pressure
Force snesor (5) is wired to controller (4).
3. a kind of hydraulic crawler excavator multipath hydraulic system according to claim 1, which is characterized in that bucket arm cylinder hydraulic pressure system
In system, it is provided with first pressure sensor (7) on the pipeline of bucket arm cylinder (15) connection rod chamber, bucket arm cylinder (15) connects nothing
Second pressure sensor (8) are provided on the pipeline of rod cavity；On pipeline between the rodless cavity and oil return pipe of bucket arm cylinder (15)
It is provided with third overflow valve (12), is provided with the second overflow valve on the pipeline between the rod chamber and oil return pipe of bucket arm cylinder (15)
(6)；First proportioning valve (9), the second proportioning valve (11), first pressure sensor (7), second pressure sensor (8) and third pressure
Force snesor (5) is wired to controller (4).
4. a kind of hydraulic crawler excavator multipath hydraulic system according to claim 1, which is characterized in that bucket cylinder hydraulic pressure system
In system, it is provided with first pressure sensor (7) on the pipeline of bucket cylinder (16) connection rod chamber, bucket cylinder (16) connects nothing
Second pressure sensor (8) are provided on the pipeline of rod cavity；On pipeline between the rodless cavity and oil return pipe of bucket cylinder (16)
It is provided with third overflow valve (12), is provided with the second overflow valve on the pipeline between the rod chamber and oil return pipe of bucket cylinder (16)
(6)；First proportioning valve (9), the second proportioning valve (11), first pressure sensor (7), second pressure sensor (8) and third pressure
Force snesor (5) is wired to controller (4).
5. a kind of hydraulic crawler excavator multipath hydraulic system according to claim 1, which is characterized in that rotary motor hydraulic pressure system
In system, it is provided with first pressure sensor (7) on the pipeline of rotary motor (17) connection entrance, rotary motor (17) connection outlet
Pipeline on be provided with second pressure sensor (8)；It is provided on pipeline between the outlet and oil return pipe of rotary motor (17)
Third overflow valve (12) is provided with the second overflow valve (6) on the pipeline between the entrance and oil return pipe of rotary motor (17)；First
Proportioning valve (9), the second proportioning valve (11), first pressure sensor (7), second pressure sensor (8) and third pressure sensor
(5) controller (4) are wired to.
6. a kind of hydraulic crawler excavator multipath hydraulic system according to claim 1, which is characterized in that running motor hydraulic pressure system
In system, it is provided with first pressure sensor (7) on the pipeline of running motor (18) connection entrance, running motor (18) connection outlet
Pipeline on be provided with second pressure sensor (8)；It is provided on pipeline between the outlet and oil return pipe of running motor (18)
Third overflow valve (12) is provided with the second overflow valve (6) on the pipeline between the entrance and oil return pipe of running motor (18)；First
Proportioning valve (9), the second proportioning valve (11), first pressure sensor (7), second pressure sensor (8) and third pressure sensor
(5) controller (4) are wired to.
7. a kind of hydraulic crawler excavator multipath hydraulic system according to claim 1, which is characterized in that variable pump (1) connection
There are engine (2)；The first overflow valve (3) and third pressure sensor (5) are provided on the export pipeline of variable pump (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821919303.3U CN209243808U (en) | 2018-11-20 | 2018-11-20 | A kind of hydraulic crawler excavator multipath hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821919303.3U CN209243808U (en) | 2018-11-20 | 2018-11-20 | A kind of hydraulic crawler excavator multipath hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209243808U true CN209243808U (en) | 2019-08-13 |
Family
ID=67529147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821919303.3U Expired - Fee Related CN209243808U (en) | 2018-11-20 | 2018-11-20 | A kind of hydraulic crawler excavator multipath hydraulic system |
Country Status (1)
| Country | Link |
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| CN (1) | CN209243808U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109235534A (en) * | 2018-11-20 | 2019-01-18 | 长安大学 | A kind of hydraulic crawler excavator multipath hydraulic system |
| CN111485590A (en) * | 2020-05-28 | 2020-08-04 | 三一重机有限公司 | Hydraulic control system, excavator and excavator control method |
-
2018
- 2018-11-20 CN CN201821919303.3U patent/CN209243808U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109235534A (en) * | 2018-11-20 | 2019-01-18 | 长安大学 | A kind of hydraulic crawler excavator multipath hydraulic system |
| CN111485590A (en) * | 2020-05-28 | 2020-08-04 | 三一重机有限公司 | Hydraulic control system, excavator and excavator control method |
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