CN201738368U - Hydraulic damping control loop of excavator - Google Patents

Hydraulic damping control loop of excavator Download PDF

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Publication number
CN201738368U
CN201738368U CN2010201643640U CN201020164364U CN201738368U CN 201738368 U CN201738368 U CN 201738368U CN 2010201643640 U CN2010201643640 U CN 2010201643640U CN 201020164364 U CN201020164364 U CN 201020164364U CN 201738368 U CN201738368 U CN 201738368U
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CN
China
Prior art keywords
guide
valve
way
operated directional
directional control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2010201643640U
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Chinese (zh)
Inventor
胡学军
张博友
陈志强
张军荣
李兵
李小亮
夏金玲
张玮
胡月平
周文涛
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.)
Qingdao Lovol Engineering Machinery Co Ltd
Original Assignee
Foton Lovol International Heavy Industries Co Ltd
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Filing date
Publication date
Application filed by Foton Lovol International Heavy Industries Co Ltd filed Critical Foton Lovol International Heavy Industries Co Ltd
Priority to CN2010201643640U priority Critical patent/CN201738368U/en
Application granted granted Critical
Publication of CN201738368U publication Critical patent/CN201738368U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a hydraulic damping control loop of excavator and belongs to the hydraulic system of an excavator. The control loop mainly comprises a main two-way hydraulic control reversing valve and a manual pilot valve, wherein the main two-way hydraulic control reversing valve controls the operation of hydraulic execution elements through working hydraulic oil, and the manual pilot valve controls the reverse of the main two-way hydraulic control reversing valve through pilot hydraulic oil. A first pilot oil path and a second pilot oil path are arranged between a working oil port of the manual pilot valve and a control oil port of the main two-way hydraulic control reversing valve, a first one-way throttling valve and a second one-way throttling valve are connected in series in the first pilot oil path and the second pilot oil path respectively, and a pilot two-way hydraulic control reversing valve is arranged between the first pilot oil path and the second pilot oil path. The control loop not only can reduce vibration of entire machine, but also can eliminate the negative effect of action delay. With a reasonable design, the control loop can be widely applied in the hydraulic system of the excavator.

Description

Excavator liquid-springing control loop
Technical field
The utility model relates to a kind of excavator hydraulic system, relates in particular to a kind of excavator liquid-springing control loop.
Background technology
Present excavator field, manually the connected mode between pilot valve and the main valve mainly contains two kinds: first kind is that manual pilot valve directly is connected with main valve, and second kind is series throttle between manual pilot valve and the main valve.First kind of connected mode, in the manual pilot valve of pilot control, because directly connect, guide's hydraulic fluid pressure directly acts on the spool of main valve, the spool of main valve is moved rapidly, connect working connection, make the hydraulic actuator action, when the driver cancelled action, the spool of main valve was got back to meta under the effect of back-moving spring, close working connection, make hydraulic actuator stop action, because the effect of inertia force, when hydraulic actuator begins and stops to move, can cause the complete machine oscillation amount bigger, cause the very fast fatigue of driver; Second kind of connected mode can play certain damping effect in middle series throttle, but can produce the negative effect that action lags behind.
The utility model content
Technical problem to be solved in the utility model is: a kind of excavator liquid-springing control loop is provided, and this vibration damping control loop not only can reduce the vibration of complete machine, and can eliminate the negative effect that action lags behind.
For solving the problems of the technologies described above, the technical solution of the utility model is: excavator liquid-springing control loop comprises the two-way pilot operated directional control valve of master by the action of working hydraulic pressure oil control hydraulic actuator; Control the manual pilot valve of the two-way pilot operated directional control valve commutation of described master by guide's hydraulic oil, be provided with first guide's oil circuit between first control port of first actuator port of described manual pilot valve and the two-way pilot operated directional control valve of described master, be provided with second guide's oil circuit between second control port of second actuator port of described manual pilot valve and the two-way pilot operated directional control valve of described master; Series connection is connected to first one-way throttle valve on described first guide's oil circuit, and series connection is connected to second one-way throttle valve on described second guide's oil circuit; Be provided with the two-way pilot operated directional control valve of guide between described first guide's oil circuit and the second guide's oil circuit, two control ports of the two-way pilot operated directional control valve of described guide are connected on the described first guide's oil circuit and described second guide's oil circuit near two actuator ports of described manual pilot valve, first pair of actuator port of the two-way pilot operated directional control valve of described guide is in parallel with described first one-way throttle valve, second pair of actuator port of the two-way pilot operated directional control valve of described guide is in parallel with described second one-way throttle valve, and the two-way pilot operated directional control valve of described guide comprises that also is used for a direct work oil-out that is communicated with fuel tank.
As a kind of improvement, the two-way pilot operated directional control valve of described guide is three six pass two-way pilot operated directional control valves.
After having adopted technique scheme, the beneficial effects of the utility model are: owing to be respectively equipped with first guide's oil circuit and second guide's oil circuit between two control ports of two actuator ports of manual pilot valve and main two-way pilot operated directional control valve, on first guide's oil circuit and second guide's oil circuit, be in series with first one-way throttle valve and second one-way throttle valve respectively, be provided with the two-way pilot operated directional control valve of guide between first guide's oil circuit and the second guide's oil circuit, when carrying out control action, can reach the fast effect in the slow earlier back of spool stroke speed of main two-way pilot operated directional control valve, hydraulic oil is to the impact of executive component when having reduced to carry out action, improved the soft property of each action, improved the phenomenon that action lags behind, improved the servo-actuated of each action, eliminated because the negative effect that action lags behind and brings; In the cancellation control action, the return speed of the spool of main two-way pilot operated directional control valve is slower, has reduced the impact of hydraulic oil to executive component, has improved the soft property of each action, has significantly reduced the vibration of complete machine.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Accompanying drawing is the hydraulic schematic diagram of the utility model embodiment;
Among the figure: 1, manual pilot valve, 2, the two-way pilot operated directional control valve of guide, 3, first one-way throttle valve, 4, second one-way throttle valve, 5, main two-way pilot operated directional control valve, 6, hydraulic jack.
The specific embodiment
As shown in drawings, a kind of excavator liquid-springing control loop, comprise two-way pilot operated directional control valve 5 of master that moves by working hydraulic pressure oil control hydraulic actuator and the manual pilot valve 1 of controlling main two-way pilot operated directional control valve 5 commutations by guide's hydraulic oil, manually be provided with first guide's oil circuit between the first control port E of first actuator port A of pilot valve 1 and main two-way pilot operated directional control valve 5, manually be provided with second guide's oil circuit between the second control port F of second actuator port B of pilot valve 1 and main two-way pilot operated directional control valve 5; Series connection is connected to connect on first one-way throttle valve, 3, the second guide's oil circuits and is connected to second one-way throttle valve 4 on first guide's oil circuit; Be provided with the two-way pilot operated directional control valve 2 of guide between first guide's oil circuit and the second guide's oil circuit, two control port C, D of the two-way pilot operated directional control valve 2 of guide are connected on the first guide's oil circuit and second guide's oil circuit of close manually two actuator port A, B of pilot valve 1, first pair of actuator port of the two-way pilot operated directional control valve 2 of guide is in parallel with described first one-way throttle valve 3, second pair of actuator port of the two-way pilot operated directional control valve 2 of guide is in parallel with second one-way throttle valve 4, and the two-way pilot operated directional control valve 2 of guide comprises that also is used for a direct work oil-out that is communicated with fuel tank.The two-way pilot operated directional control valve 2 of guide is three six pass two-way pilot operated directional control valves.
Its operating principle is as follows:
Be recovered as example with the piston rod of handling manual pilot valve 1 control hydraulic jack 6, the flow direction of guide's hydraulic oil is in first guide's oil circuit: connect the oil inlet P of manual pilot valve 1 ' and the first actuator port A, guide's hydraulic oil acts on the spool of leading two-way pilot operated directional control valve 5 through first one-way throttle valve 3, and the spool that promotes main two-way pilot operated directional control valve 5 moves to the second control port F from the first control port E; The flow direction of guide's hydraulic oil is in second guide's oil circuit: originally guide's hydraulic oil of main two-way pilot operated directional control valve 5 second control port F be by second one-way throttle valve 4 and the manually second actuator port B oil return of pilot valve 1 when the spool of the two-way pilot operated directional control valve 2 of guide does not move, through oil return inlet T ' oil sump tank, because the throttling action of second one-way throttle valve 4, the oil return resistance ratios is bigger, the spool stroke resistance of main two-way pilot operated directional control valve 5 is bigger, the spool stroke speed of main two-way pilot operated directional control valve 5 is slower, drain presses oil pressure to be elevated to certain value in the ban, the spool of the two-way pilot operated directional control valve 2 of guide moves to the second control port D from the first control port C, connect the second control port F of main two-way pilot operated directional control valve 5 and the fuel-displaced working hole of the two-way pilot operated directional control valve 2 of guide, guide's hydraulic oil returns fuel tank rapidly, the spool stroke resistance of main two-way pilot operated directional control valve 5 is reduced, the spool stroke of main two-way pilot operated directional control valve 5 speeds up, can reach the fast effect in the slow earlier back of spool stroke speed of main two-way pilot operated directional control valve 5 like this, hydraulic oil is to the impact of hydraulic jack 6 when having reduced to carry out action, improved the soft property of action, improved the phenomenon that action lags behind simultaneously, improved the servo-actuated of action, eliminated because the negative effect that action lags behind and brings.
When the piston rod of cancellation hydraulic jack 6 reclaims action, the flow direction of the guide's hydraulic oil in first guide's oil circuit is: connect the oil return inlet T of manual pilot valve 1 ' and the first actuator port A, make guide's hydraulic fluid pressure of two-way pilot operated directional control valve 2 first control port C of guide and main two-way pilot operated directional control valve 5 first control port E reduce, guide's hydraulic oil of the two-way pilot operated directional control valve 2 of guide returns fuel tank through manual pilot valve 1 under action of reset spring, the spool of the two-way pilot operated directional control valve 2 of guide returns meta; Guide's hydraulic oil of main two-way pilot operated directional control valve 5 under the effect of back-moving spring through first one-way throttle valve 3 and the manual first actuator port A of pilot valve 1, return fuel tank, because the throttling action of first one-way throttle valve 1, guide's hydraulic oil return speed of main two-way pilot operated directional control valve 5 is slower, cause the return speed of spool of main two-way pilot operated directional control valve 5 slower, reduced the impact of hydraulic oil, improved the soft property of action, significantly reduced the vibration of complete machine hydraulic jack 6.
It is identical with above-mentioned principle that the piston rod of control hydraulic jack 6 stretches out and cancel the action that piston rod stretches out, and repeats no more.
The utility model is not limited to above-mentioned concrete embodiment, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, all conversion of having done all drop within the protection domain of the present utility model.

Claims (2)

1. excavator liquid-springing control loop comprises
The two-way pilot operated directional control valve of master by the action of working hydraulic pressure oil control hydraulic actuator;
Control the manual pilot valve of the two-way pilot operated directional control valve commutation of described master by guide's hydraulic oil, be provided with first guide's oil circuit between first control port of first actuator port of described manual pilot valve and the two-way pilot operated directional control valve of described master, be provided with second guide's oil circuit between second control port of second actuator port of described manual pilot valve and the two-way pilot operated directional control valve of described master; It is characterized in that:
Series connection is connected to first one-way throttle valve on described first guide's oil circuit, and series connection is connected to second one-way throttle valve on described second guide's oil circuit; Be provided with the two-way pilot operated directional control valve of guide between described first guide's oil circuit and the second guide's oil circuit, two control ports of the two-way pilot operated directional control valve of described guide are connected on the described first guide's oil circuit and described second guide's oil circuit near two actuator ports of described manual pilot valve, first pair of actuator port of the two-way pilot operated directional control valve of described guide is in parallel with described first one-way throttle valve, second pair of actuator port of the two-way pilot operated directional control valve of described guide is in parallel with described second one-way throttle valve, and the two-way pilot operated directional control valve of described guide comprises that also is used for a direct work oil-out that is communicated with fuel tank.
2. excavator liquid-springing control loop as claimed in claim 1 is characterized in that: the two-way pilot operated directional control valve of described guide is three six pass two-way pilot operated directional control valves.
CN2010201643640U 2010-04-14 2010-04-14 Hydraulic damping control loop of excavator Expired - Lifetime CN201738368U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010201643640U CN201738368U (en) 2010-04-14 2010-04-14 Hydraulic damping control loop of excavator

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Application Number Priority Date Filing Date Title
CN2010201643640U CN201738368U (en) 2010-04-14 2010-04-14 Hydraulic damping control loop of excavator

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CN201738368U true CN201738368U (en) 2011-02-09

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102788053A (en) * 2012-07-27 2012-11-21 柳州柳工挖掘机有限公司 Oil changing and buffering device used in pilot hydraulic control system
CN102788050A (en) * 2012-07-27 2012-11-21 柳州柳工挖掘机有限公司 Oil changing and buffering device and pilot hydraulic control system with same
CN102788052A (en) * 2012-07-27 2012-11-21 柳工常州挖掘机有限公司 Oil changing and buffering device and pilot hydraulic control system with same
CN102788051A (en) * 2012-07-27 2012-11-21 柳州柳工挖掘机有限公司 Pilot hydraulic control system with oil changing, buffering and stagnancy relieving functions
CN102966137A (en) * 2012-12-12 2013-03-13 潍柴动力股份有限公司 Method and device for lowering vibration of digger
CN103088854A (en) * 2011-11-05 2013-05-08 靖江市长源液压机械有限公司 Hydraulic circuit of damper valve
CN104088830A (en) * 2014-07-30 2014-10-08 徐州重型机械有限公司 Hydraulic system of crane and pilot type control valve thereof
CN105805075A (en) * 2016-05-31 2016-07-27 青岛雷沃挖掘机有限公司 Buffering loop avoiding influence on starting response and engineering machinery
CN110566531A (en) * 2019-10-16 2019-12-13 湖南鸿辉科技有限公司 Hydraulic control reversing valve for controlling multiple oil ways
CN112498047A (en) * 2019-09-16 2021-03-16 河北雷萨重型工程机械有限责任公司 Crane air conditioner control system and crane

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103088854A (en) * 2011-11-05 2013-05-08 靖江市长源液压机械有限公司 Hydraulic circuit of damper valve
CN102788051B (en) * 2012-07-27 2015-09-02 柳州柳工挖掘机有限公司 There is the pilot hydraulic control system of stagnant function of changing oil, cushion and disappear
CN102788050A (en) * 2012-07-27 2012-11-21 柳州柳工挖掘机有限公司 Oil changing and buffering device and pilot hydraulic control system with same
CN102788052A (en) * 2012-07-27 2012-11-21 柳工常州挖掘机有限公司 Oil changing and buffering device and pilot hydraulic control system with same
CN102788051A (en) * 2012-07-27 2012-11-21 柳州柳工挖掘机有限公司 Pilot hydraulic control system with oil changing, buffering and stagnancy relieving functions
CN102788053A (en) * 2012-07-27 2012-11-21 柳州柳工挖掘机有限公司 Oil changing and buffering device used in pilot hydraulic control system
CN102788053B (en) * 2012-07-27 2015-09-02 柳州柳工挖掘机有限公司 Change oil and damping device and there is the pilot hydraulic control system of this device
CN102966137B (en) * 2012-12-12 2015-10-07 潍柴动力股份有限公司 A kind of method and device reducing excavator vibration
CN102966137A (en) * 2012-12-12 2013-03-13 潍柴动力股份有限公司 Method and device for lowering vibration of digger
CN104088830A (en) * 2014-07-30 2014-10-08 徐州重型机械有限公司 Hydraulic system of crane and pilot type control valve thereof
CN105805075A (en) * 2016-05-31 2016-07-27 青岛雷沃挖掘机有限公司 Buffering loop avoiding influence on starting response and engineering machinery
CN112498047A (en) * 2019-09-16 2021-03-16 河北雷萨重型工程机械有限责任公司 Crane air conditioner control system and crane
CN110566531A (en) * 2019-10-16 2019-12-13 湖南鸿辉科技有限公司 Hydraulic control reversing valve for controlling multiple oil ways
CN110566531B (en) * 2019-10-16 2024-03-15 湖南鸿辉科技有限公司 Hydraulic control reversing valve for controlling multiple oil ways

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GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: QINGDAO LEIWO EXCAVATOR CO., LTD.

Free format text: FORMER OWNER: FUTIAN LEIWO INTERNATIONAL HEAVY INDUSTRY CO., LTD.

Effective date: 20140827

C41 Transfer of patent application or patent right or utility model
COR Change of bibliographic data

Free format text: CORRECT: ADDRESS; FROM: 261206 WEIFANG, SHANDONG PROVINCE TO: 266500 QINGDAO, SHANDONG PROVINCE

TR01 Transfer of patent right

Effective date of registration: 20140827

Address after: 266500, No. 75 east the Yellow River Road, Huangdao economic and Technological Development Zone, Qingdao, Shandong

Patentee after: QINGDAO LEIWO EXCAVATOR CO., LTD.

Address before: 261206 Beihai South Road, Fangzi District, Shandong, No. 192, No.

Patentee before: Futian Leiwo International Heavy Industry Co., Ltd.

CP01 Change in the name or title of a patent holder

Address after: 266500, No. 75 east the Yellow River Road, Huangdao economic and Technological Development Zone, Qingdao, Shandong

Patentee after: Qingdao leiwo Engineering Machinery Co. Ltd.

Address before: 266500, No. 75 east the Yellow River Road, Huangdao economic and Technological Development Zone, Qingdao, Shandong

Patentee before: QINGDAO LEIWO EXCAVATOR CO., LTD.

CP01 Change in the name or title of a patent holder
CX01 Expiry of patent term

Granted publication date: 20110209

CX01 Expiry of patent term