CN109235534A - A kind of hydraulic crawler excavator multipath hydraulic system - Google Patents

A kind of hydraulic crawler excavator multipath hydraulic system Download PDF

Info

Publication number
CN109235534A
CN109235534A CN201811384856.8A CN201811384856A CN109235534A CN 109235534 A CN109235534 A CN 109235534A CN 201811384856 A CN201811384856 A CN 201811384856A CN 109235534 A CN109235534 A CN 109235534A
Authority
CN
China
Prior art keywords
proportioning valve
pipeline
outlet
hydraulic system
pressure sensor
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.)
Pending
Application number
CN201811384856.8A
Other languages
Chinese (zh)
Inventor
叶敏
李嘉波
尤广辉
石大维
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changan University
Original Assignee
Changan University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Changan University filed Critical Changan University
Priority to CN201811384856.8A priority Critical patent/CN109235534A/en
Publication of CN109235534A publication Critical patent/CN109235534A/en
Pending legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/2221Control of flow rate; Load sensing arrangements
    • E02F9/2225Control of flow rate; Load sensing arrangements using pressure-compensating valves
    • E02F9/2228Control of flow rate; Load sensing arrangements using pressure-compensating valves including an electronic controller
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/2221Control of flow rate; Load sensing arrangements
    • E02F9/2232Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
    • E02F9/2235Control of flow rate; Load sensing arrangements using one or more variable displacement pumps including an electronic controller
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/2246Control of prime movers, e.g. depending on the hydraulic load of work tools

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 present invention 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

A kind of hydraulic crawler excavator multipath hydraulic system
Technical field
The invention belongs to hydraulic excavating machinery drive area, in particular to a kind of hydraulic crawler excavator multipath hydraulic 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.
Summary of the invention
The purpose of the present invention is to provide a kind of hydraulic crawler excavator multipath hydraulic systems, to solve the above problems.
To achieve the above object, the invention adopts the 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 present invention has following technical effect:
The present invention includes boom cylinder hydraulic system, bucket arm cylinder hydraulic system, bucket cylinder hydraulic system, rotary motor Hydraulic system and running motor hydraulic system, each system include independent overflow valve and proportioning valve, realize that load port is independently controlled System, so that control is more flexible;Simultaneously use variable pump for executive component, by controller acquisition sensor data, come and When regulated variable pump be input to the flow of system, avoid energy waste, realize Energy Saving Control.
The present invention can control variable pump and proportioning valve, which has the function of valve control and pump control simultaneously, using pressure control System 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 is 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).
CN201811384856.8A 2018-11-20 2018-11-20 A kind of hydraulic crawler excavator multipath hydraulic system Pending CN109235534A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811384856.8A CN109235534A (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
CN201811384856.8A CN109235534A (en) 2018-11-20 2018-11-20 A kind of hydraulic crawler excavator multipath hydraulic system

Publications (1)

Publication Number Publication Date
CN109235534A true CN109235534A (en) 2019-01-18

Family

ID=65075330

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811384856.8A Pending CN109235534A (en) 2018-11-20 2018-11-20 A kind of hydraulic crawler excavator multipath hydraulic system

Country Status (1)

Country Link
CN (1) CN109235534A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110671376A (en) * 2019-09-29 2020-01-10 中国矿业大学 Engineering machinery load sensitive-inlet-outlet independent hydraulic system and control method thereof
CN112128175A (en) * 2020-08-27 2020-12-25 中联重科股份有限公司 Engineering machinery power adjusting method based on included angle detection and hydraulic power system
CN112128176A (en) * 2020-08-27 2020-12-25 中联重科股份有限公司 Engineering machinery power adjusting method based on displacement detection and hydraulic power system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110671376A (en) * 2019-09-29 2020-01-10 中国矿业大学 Engineering machinery load sensitive-inlet-outlet independent hydraulic system and control method thereof
CN112128175A (en) * 2020-08-27 2020-12-25 中联重科股份有限公司 Engineering machinery power adjusting method based on included angle detection and hydraulic power system
CN112128176A (en) * 2020-08-27 2020-12-25 中联重科股份有限公司 Engineering machinery power adjusting method based on displacement detection and hydraulic power system
CN112128175B (en) * 2020-08-27 2022-04-19 中联重科股份有限公司 Engineering machinery power adjusting method based on included angle detection and hydraulic power system
CN112128176B (en) * 2020-08-27 2022-04-19 中联重科股份有限公司 Engineering machinery power adjusting method based on displacement detection and hydraulic power system

Similar Documents

Publication Publication Date Title
CN109235534A (en) A kind of hydraulic crawler excavator multipath hydraulic system
CN202827716U (en) Steering electro-hydraulic control system for remote-control loader
CN101575978B (en) Pressure-speed mixed control shield propulsion hydraulic system
CN103122648B (en) Multi-way valve hydraulic control system, rectilinear walking control valve and excavator
Mirzaliev A review of energy saving techniques in mobile hydraulic machines
WO2016004664A1 (en) Energy-saving control system of excavator
CN203926235U (en) Have many actuators loop without throttling hydraulic system
CN104246237A (en) Hydraulic drive device of construction machine
CN202833008U (en) Concrete pump and hydraulic system thereof
CN107059983A (en) Minus flow imports and exports independent composite control hydraulic system
CN102312451B (en) Excavator converging control system and excavator thereof
CN201553113U (en) Hydraulic system for crawler traction engines
CN204553377U (en) Low energy consumption many actuators hydraulic system and excavator
CN107061382B (en) Positive flow imports and exports independent composite control hydraulic system
CN104389830A (en) Intelligent synchronous type hydraulic hoist
CN209243808U (en) A kind of hydraulic crawler excavator multipath hydraulic system
CN105351263B (en) A kind of differential hydro cylinder control loop
CN103924629A (en) Hydraulic excavator driving system with potential energy recovery function
CN204590151U (en) The new-type movable arm potential energy recovery system of ultra-large type hydraulic crawler excavator
CN202544013U (en) Excavator hydraulic system and excavator
CN209620158U (en) A kind of excavator hydraulic control system
CN201507494U (en) Pilot valve block of loader operation device
CN205715031U (en) A kind of multiple directional control valve of band mechanical release device
CN104176664A (en) Hydraulic system for preventing forward running of telescopic arm of crane and crane
CN103807236B (en) Valve control unit loads mouth independently controls multi-cylinder assignment of traffic hydraulic system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination