CN103790196B - A kind of Hydraulic Excavator's Boom potential energy recovery control device - Google Patents

A kind of Hydraulic Excavator's Boom potential energy recovery control device Download PDF

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Publication number
CN103790196B
CN103790196B CN201410021665.0A CN201410021665A CN103790196B CN 103790196 B CN103790196 B CN 103790196B CN 201410021665 A CN201410021665 A CN 201410021665A CN 103790196 B CN103790196 B CN 103790196B
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valve
equalizing
way
equalizing valve
swing arm
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CN103790196A (en
Inventor
李宗�
王振兴
张宏
秦家升
费树辉
史继江
高见厂
孙本强
郑扬
李志鹏
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Xuzhou XCMG Excavator Machinery Co Ltd
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Xuzhou XCMG Excavator Machinery Co Ltd
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Abstract

The invention discloses a kind of Hydraulic Excavator's Boom potential energy recovery control device, comprise the first one way valve (1), first equalizing valve (2), second equalizing valve (3), second one way valve (4), overflow valve (5), first one-way valve inlet is connected with swing arm multi-channel control valve outlet port with the first balancing valve outlet, first one-way valved outlet is connected with chamber at the bottom of the second equalizing valve entrance and boom cylinder with the first equalizing valve entrance, second balancing valve outlet is connected with the second one-way valve inlet, second one-way valved outlet is with stored energy or utilize device to be connected, first equalizing valve is connected with swing arm decline guide oil circuit with the control mouth of the second equalizing valve, the control oil return opening of the first equalizing valve is communicated with fuel tank with the control oil return opening of the second equalizing valve, overflow valve is arranged on the second one way valve and stored energy or utilizes between device.This device can realize handling height when swing arm decline fine motion is done, handling not high when carrying out recovery quick acting to movable arm potential energy, and integrated level is high, transplantability is good.

Description

A kind of Hydraulic Excavator's Boom potential energy recovery control device
Technical field
The present invention relates to a kind of hydraulic crawler excavator, specifically a kind of Hydraulic Excavator's Boom potential energy recovery control device, belongs to excavator technical field.
Background technology
Excavator uses scraper bowl to excavate higher or lower than materials such as the soil holding machine side, coal, silt or the Soil and Rocks after pre-pine, and load haulage vehicle or unload the earth moving plant to rickyard, become one of topmost engineering machinery in engineering construction at present.
Hydraulic crawler excavator operating efficiency is high, applied widely, but the problem that its energy consumption is high, discharge is poor is under social development requires more and more higher background to energy-conserving and environment-protective, shows all the more necessity of improvement.
In the hydraulic crawler excavator course of work, equipment needs frequent rising and decline, when rising to a high position, potential energy improves, and when declining, for preventing decrease speed too fast, throttling speed control circuit is set usually, potential energy a large amount of in throttle grverning process is converted into heat energy, cause system temperature to raise fast, reduce the performance of hydraulic system, also can increase heat radiation power simultaneously.
At present for the research of excavator potential energy recovery control device, many employings solenoid operated directional valve or proportional reversing valve control swing arm action, complete the recovery of movable arm potential energy simultaneously, if application number is 201120372836.6, the Chinese invention patent of authorizing on 05 30th, 2012, which disclose the one way valve before utilizing luffing jib maintaining valve to realize the large chamber of boom cylinder and enter, the automatic switchover of return line, the second bidirectional hydraulic control reversal valve is utilized to realize accumulator to collection of energy, the automatic decision of release, but adopt separately solenoid operated directional valve to control, the microoperation of swing arm cannot be ensured, the performance of swing arm can be sacrificed, for another example application number be 201110048582.7,2011 years 05 month 25 days announce Chinese invention patent, which disclose and adopt adoption rate reversal valve control realization movable arm potential energy to reclaim, but adoption rate reversal valve controls, need the couplings such as proportional reversing valve aperture area, control signal, swing arm exercise performance, and all will again mate for each different type, its versatility and portability bad, debugging and manufacturing cost higher.
Summary of the invention
For the problems referred to above, the invention provides a kind of Hydraulic Excavator's Boom potential energy recovery control device, meet handling height when swing arm decline fine motion is done, the handling not high but requirement need reclaimed excavator swing arm potential energy during quick acting, change few to the original components and parts of excavator, integrated level is high, portable good.
For achieving the above object, this Hydraulic Excavator's Boom potential energy recovery control device comprises the first one way valve, first equalizing valve, second equalizing valve, second one way valve and overflow valve, the entrance of described first one way valve is connected with the outlet of swing arm multi-way control valve with the outlet of the first equalizing valve, at the bottom of the entrance of the outlet of the first one way valve and the entrance of the first equalizing valve and the second equalizing valve and boom cylinder, chamber is connected, the outlet of the second equalizing valve is connected with the entrance of the second one way valve, the outlet of the second one way valve is with stored energy or utilize device to be connected, first equalizing valve is connected with swing arm decline guide oil circuit with the control mouth of the second equalizing valve, the control oil return opening of the first equalizing valve is communicated with fuel tank with the control oil return opening of the second equalizing valve, overflow valve is arranged on the second one way valve and stored energy or utilizes between device.
As present invention further optimization scheme, the first described one way valve, the second one way valve are the logic valves with reverse cutoff function.
As present invention further optimization scheme, described first equalizing valve is solenoid-operated proportional reversal valve open in usual or hydraulic control proportional reversing valve.
As present invention further optimization scheme, described second equalizing valve is normally closed type solenoid-operated proportional reversal valve or hydraulic control proportional reversing valve.
Compared with prior art, the present invention is used as micro-action circuit owing to being provided with the first equalizing valve, second equalizing valve is used as quick acting loop, therefore, it is possible to treat the microoperation of swing arm decline and quick step-down operation with a certain discrimination, ensure swing arm exercise performance when microoperation, when falling operation at the fast speed, ensure the recovery of movable arm potential energy; Because equalizing valve controlled pressure of the present invention controls according to the adjustment of swing arm decline pilot pressure, therefore automaticity is high; Because the first equalizing valve and the second equalizing valve are provided with identical controlled pressure source, and direction of action is contrary, and therefore decline fine motion work and quick acting achieve automatic decision, little to swing arm performance impact; Because this device can be connected at the bottom of original system swing arm multi-channel control valve outlet port and boom cylinder between the entrance of chamber, without the need to changing original system, therefore versatility and portability good, can reduce debugging and manufacturing cost.
Accompanying drawing explanation
Fig. 1 is hydraulic schematic diagram of the present invention,
Fig. 2 is pilot handle push rod of the present invention displacement and output pressure graph of relation.
In figure: 1, the first one way valve, the 2, first equalizing valve, the 3, second equalizing valve, the 4, second one way valve, 5, overflow valve, 6, swing arm multi-way control valve, 7, boom cylinder, 8, fuel tank, 9, stored energy or utilize device, 10, swing arm decline guide oil circuit, 11, oil supply system.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described.
As shown in Figure 1, this Hydraulic Excavator's Boom potential energy recovery control device comprises the first one way valve 1, first equalizing valve 2, second equalizing valve 3, second one way valve 4, overflow valve 5.
The entrance of the first one way valve 1 and the outlet of the first equalizing valve 2 export with swing arm multi-way control valve 6 and are connected, the outlet of the first one way valve 1 is connected with the second equalizing valve 3 entrance and chamber, boom cylinder 7 end with the entrance of the first equalizing valve 2, the outlet of the second equalizing valve 3 is connected with the entrance of the second one way valve 4, the outlet of the second one way valve 4 is with stored energy or utilize device 9 to be connected, first equalizing valve 2 is connected with swing arm decline guide oil circuit 10 with the control mouth of the second equalizing valve 3, the control oil return opening of the first equalizing valve 2 is communicated with fuel tank 8 with the control oil return opening of the second equalizing valve 3, overflow valve 5 is arranged on the second one way valve 4 and stored energy or utilizes between device 9.
In order to can the reliability of safety action logic and system, as present invention further optimization scheme, the first described one way valve 1, second one way valve 4 replaces with the logic valve with reverse cutoff function.
In order to improve precision and the flexibility of control, as present invention further optimization scheme, described first equalizing valve 2 is open in usual, replaces with solenoid-operated proportional reversal valve or hydraulic control proportional reversing valve.
In order to improve precision and the flexibility of control, as present invention further optimization scheme, described second equalizing valve 3 is normally closed type, replaces with solenoid-operated proportional reversal valve or hydraulic control proportional reversing valve.
Under duty, when swing arm rises, oil supply system 11 fuel feeding, first equalizing valve 2 is opening, second equalizing valve 3 is closed condition, and the outlet of swing arm multi-way control valve 6 is communicated with chamber, boom cylinder 7 end by the first one way valve 1, first equalizing valve 2, and hydraulic oil promotes excavator swing arm and rises;
When swing arm declines, oil supply system 11 fuel feeding, first equalizing valve 2, second equalizing valve 3 controlled pressure adjusts according to swing arm decline pilot pressure, the action of pilot control handle does not reach total travel, during the state of swing arm decline pilot pressure under P1, swing arm drops to fine motion and does, first equalizing valve 2 is opening, second equalizing valve 3 is closed condition, first equalizing valve is used as micro-action circuit, chamber, boom cylinder 7 end is by the outlet of the first equalizing valve 2 with swing arm multi-way control valve 6, boom cylinder 7 end cavity pressure oil is by the former loop oil sump tank 8 of swing arm multi-way control valve 6, the exercise performance of swing arm is subject to the Properties Control of former swing arm multi-way control valve 6 spool, identical with original system, when swing arm decline pilot control handle output pressure is greater than the state of P1, swing arm drops to quick acting, first equalizing valve 2 is closing process or buttoned-up status, second equalizing valve 3 is opening process or complete opening, first equalizing valve 2 and the action simultaneously of the second equalizing valve 3, second equalizing valve is used as quick acting loop, and chamber, boom cylinder 7 end is connected with energy storage device or energy utilization device 9 by the second equalizing valve 3, second one way valve 4, reaches the effect of reclaiming potential energy, recovered oil hydraulic coupling limits by overflow valve 5 pressure.
Present invention achieves swing arm micro-performance that declines identical with original system, the recoverable function of gesture is carried out in swing arm decline quick acting, because the first equalizing valve and the second equalizing valve are provided with identical controlled pressure source, and direction of action is contrary, therefore decline fine motion work and quick acting achieve automatic decision, little to swing arm performance impact.
As shown in Figure 2, when swing arm decline microoperation, pilot handle output pressure is under P1 pressure, and when swing arm decline fast operating, pilot handle output pressure is between P1 and P2, and P2 is greater than P1; Control mouth pressure first equalizing valve 2 under P1 and be held open state, when controlling to be in closing process or buttoned-up status when mouth pressure is greater than P1; Control mouth pressure second equalizing valve 3 under P1 and keep closed condition, be in opening process or complete opening when controlling mouth pressure and being greater than P1.
The present invention can treat the microoperation of swing arm decline and quick step-down operation with a certain discrimination, ensures swing arm exercise performance when microoperation, ensures the recovery of movable arm potential energy when falling operation at the fast speed; Decline fine motion work and quick acting achieve automatic decision, little to swing arm performance impact, and automaticity is high, versatility and portability good, can reduce debugging and manufacturing cost.

Claims (6)

1. a Hydraulic Excavator's Boom potential energy recovery control device, comprise the first one way valve (1), first equalizing valve (2), second equalizing valve (3), second one way valve (4) and overflow valve (5), oil supply system (11) is connected with the entrance of swing arm multi-way control valve (6), the epicoele of boom cylinder (7) is connected with swing arm multi-way control valve (6), it is characterized in that, the entrance of the first one way valve (1) and the outlet of the first equalizing valve (2) export with swing arm multi-way control valve (6) and are connected, the outlet of the first one way valve (1) is connected with the chamber, the end of the entrance of the first equalizing valve (2) with the second equalizing valve (3) entrance and boom cylinder (7), the outlet of the second equalizing valve (3) is connected with the entrance of the second one way valve (4), the outlet of the second one way valve (4) is with stored energy or utilize device (9) to be connected, first equalizing valve (2) is connected with swing arm decline guide oil circuit (10) with the control mouth of the second equalizing valve (3), the control oil return opening of the first equalizing valve (2) is communicated with fuel tank (8) with the control oil return opening of the second equalizing valve (3), overflow valve (5) is arranged on the second one way valve (4) and stored energy or utilizes between device (9).
2. Hydraulic Excavator's Boom potential energy recovery control device according to claim 1, is characterized in that, described first equalizing valve (2) is solenoid-operated proportional reversal valve open in usual or hydraulic control proportional reversing valve.
3. Hydraulic Excavator's Boom potential energy recovery control device according to claim 1, is characterized in that, described second equalizing valve (3) is normally closed type solenoid-operated proportional reversal valve or hydraulic control proportional reversing valve.
4. Hydraulic Excavator's Boom potential energy recovery control device according to claim 1, is characterized in that, described the first one way valve (1), the second one way valve (4) are the logic valves with reverse cutoff function.
5. Hydraulic Excavator's Boom potential energy recovery control device according to claim 4, is characterized in that, described first equalizing valve (2) is solenoid-operated proportional reversal valve open in usual or hydraulic control proportional reversing valve.
6. Hydraulic Excavator's Boom potential energy recovery control device according to claim 4, is characterized in that, described second equalizing valve (3) is normally closed type solenoid-operated proportional reversal valve or hydraulic control proportional reversing valve.
CN201410021665.0A 2014-01-17 2014-01-17 A kind of Hydraulic Excavator's Boom potential energy recovery control device Active CN103790196B (en)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104358749B (en) * 2014-09-30 2017-01-18 徐州徐工挖掘机械有限公司 Energy recovery and utilization system for movable arm potential energy
CN104747544B (en) * 2015-02-04 2017-01-11 同济大学 Engineering machinery movable arm potential energy variable amplitude energy recovery device
CN105926696B (en) * 2016-06-20 2017-12-29 浙江大学 A kind of excavator swing arm potential energy classification recovery and release device and its method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201339206Y (en) * 2008-12-09 2009-11-04 中南大学 Movable arm potential energy recovery device of hybrid power hydraulic pressure excavating machine
CN201649155U (en) * 2010-02-05 2010-11-24 浙江大学 Rotary decelerating brake energy recovery system of hydraulic excavator
CN201746870U (en) * 2010-06-10 2011-02-16 重汽集团专用汽车公司 Hydraulic hybrid power device of excavator
CN203729356U (en) * 2014-01-17 2014-07-23 徐州徐工挖掘机械有限公司 Hydraulic excavator movable arm potential energy recovery control device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3481674B2 (en) * 1994-05-31 2003-12-22 東芝機械株式会社 Hydraulic circuit of construction machinery

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201339206Y (en) * 2008-12-09 2009-11-04 中南大学 Movable arm potential energy recovery device of hybrid power hydraulic pressure excavating machine
CN201649155U (en) * 2010-02-05 2010-11-24 浙江大学 Rotary decelerating brake energy recovery system of hydraulic excavator
CN201746870U (en) * 2010-06-10 2011-02-16 重汽集团专用汽车公司 Hydraulic hybrid power device of excavator
CN203729356U (en) * 2014-01-17 2014-07-23 徐州徐工挖掘机械有限公司 Hydraulic excavator movable arm potential energy recovery control device

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