CN102535575A - Hydraulic control energy-saving device of crawler-type hydraulic digging machine - Google Patents

Hydraulic control energy-saving device of crawler-type hydraulic digging machine Download PDF

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Publication number
CN102535575A
CN102535575A CN2012100257632A CN201210025763A CN102535575A CN 102535575 A CN102535575 A CN 102535575A CN 2012100257632 A CN2012100257632 A CN 2012100257632A CN 201210025763 A CN201210025763 A CN 201210025763A CN 102535575 A CN102535575 A CN 102535575A
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CN
China
Prior art keywords
valve
hydraulic
rotary motor
oil
communicated
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
CN2012100257632A
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Chinese (zh)
Inventor
李春生
王保森
王正磊
满涛
谢广
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.)
STRONG CONSTRUCTION MACHINERY (JINING) CO Ltd
Strong Construction Machinery Co Ltd
Original Assignee
STRONG CONSTRUCTION MACHINERY (JINING) CO Ltd
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 STRONG CONSTRUCTION MACHINERY (JINING) CO Ltd filed Critical STRONG CONSTRUCTION MACHINERY (JINING) CO Ltd
Priority to CN2012100257632A priority Critical patent/CN102535575A/en
Publication of CN102535575A publication Critical patent/CN102535575A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a hydraulic control energy-saving device of a crawler-type hydraulic digging machine. The hydraulic control energy-saving device comprises a pilot handle, a back pressure valve, a bypass valve, a hydraulic pump and an engine, wherein the engine is connected with the hydraulic pump, the hydraulic pump is communicated with a hydraulic oil tank, a shuttle valve is arranged between a left connecting hose and a right connecting hose of the pilot handle, a middle valve core of the shuttle valve is connected with control cavities of the back pressure valve and the bypass cavity through the connecting hoses, the left connecting hose and the right connecting hose of the pilot handle are respectively connected with two ends of a control cavity of a main valve core of a rotary motor, the hydraulic pump is connected with the control cavity of the main valve core of the rotary motor through an oil path, the control cavity of the main valve core of the rotary motor is communicated with the rotary motor through an oil path, two ends of the back pressure valve and the bypass valve are respectively communicated with the control cavity of the valve core of the rotary motor and the hydraulic oil tank through oil paths, and an oil path communicated with an oil supplementing opening of the rotary motor is arranged on the oil path for communicating the back pressure valve and the bypass valve with the control cavity of the main valve core of the rotary motor. The hydraulic control energy-saving device has the characteristics that the oil is saved, the waste gas exhaust quantity is small, the noise is low, and the efficiency is high.

Description

Crawler hypraulic excavator hydraulic control energy saver
Technical field the invention belongs to the hydraulic crawler excavator technical field of hydraulic, relates to a kind of crawler hypraulic excavator hydraulic control energy saver, and this device is applicable to hydraulic crawler excavator gyration control.
All increased Hydraulic Elements on the background technology hydraulic control system way to cycle oil that hydraulic crawler excavator uses now both at home and abroad: counterbalance valve and bypass valve increase oil compensation pressure and return oil pressure.In the process of avoiding the digger operating device high speed rotary, the oil-feed of rotary motor oil-in is not enough, and emptying phenomenon takes place.Simultaneously, also avoid in the rotary braking process, because oil return opening oil return resistance is little, pressed deficiency, braking moment is little, causes the problem of rotary braking time lengthening.
But the hydraulic control system way to cycle oil increases counterbalance valve can make excavator in whole operation cycle process with bypass valve, all has return oil pressure, makes that action resistance beyond the revolution becomes greatly, actuation time is elongated.In this process, the loss of system liquid pressure energy is bigger, and system temperature rises, and increases the Hydraulic Elements leakage rate, influences potted component performance and application life, has reduced the reliability of system.
Summary of the invention the objective of the invention is to solve prior art and exists the hydraulic pressure loss of energy than technical problem big and that application life is short, a kind of crawler hypraulic excavator hydraulic control energy saver is provided, to overcome the deficiency of prior art.
Crawler hypraulic excavator hydraulic control energy saver of the present invention; It comprises guide's handle, counterbalance valve, bypass valve, hydraulic pump and motor; Said motor is connected with hydraulic pump, and hydraulic pump is communicated with hydraulic oil container, is provided with shuttle valve between left and right two connection flexible pipes of guide's handle; Its main points are that the middle spool of said shuttle valve is connected with the control chamber of counterbalance valve and bypass valve through connecting flexible pipe, and left and right two connection flexible pipes of guide's handle are connected with the two ends of rotary motor main valve plug control chamber respectively; Said hydraulic pump is connected with rotary motor main valve plug control chamber through oil circuit, and said rotary motor main valve plug control chamber is communicated with rotary motor through oil circuit; The two ends of said counterbalance valve and bypass valve are communicated with rotary motor main valve plug control chamber and hydraulic oil container through oil circuit respectively, and the oil circuit that counterbalance valve and bypass valve are communicated with rotary motor main valve plug control chamber is provided with the oil circuit that is communicated with rotary motor repairing mouth.
The invention solves prior art and exist the hydraulic pressure loss of energy, have characteristics fuel-efficient, that discharge amount of exhaust gas is little, noise is low, efficient is high, thereby reach the economic effect of energy-conserving and environment-protective than technical problem big and that application life is short.
Appended drawings is a structural principle sketch map of the present invention.
Among the figure 1, guide's handle 2, shuttle valve 3, connect flexible pipe 4, connect flexible pipe 5, connect flexible pipe 6, counterbalance valve 7, bypass valve 8, hydraulic pump 9, motor 10, rotary motor main valve plug control chamber 11, rotary motor 12, hydraulic oil container 13, repairing mouth
The specific embodiment is with reference to accompanying drawing; It comprises guide's handle 1, counterbalance valve 6, bypass valve 7, hydraulic pump 8 and motor 9 the present invention; Said motor 9 is connected with hydraulic pump 8; Hydraulic pump 8 is communicated with hydraulic oil container 12; Left and right two of guide's handle 1 connect flexible pipes 3, are provided with shuttle valve 2 between 4, and the middle spool of said shuttle valve 2 is connected with the control chamber of counterbalance valve 6 with bypass valve 7 through connecting flexible pipe 5, and left and right two connection flexible pipes 3,4 of guide's handle 1 are connected with the two ends of rotary motor main valve plug control chamber 10 respectively; Said hydraulic pump 8 is connected with rotary motor main valve plug control chamber 10 through oil circuit, and said rotary motor main valve plug control chamber 10 is communicated with rotary motor 11 through oil circuit; The two ends of said counterbalance valve 6 and bypass valve 7 are communicated with rotary motor main valve plug control chamber 10 and hydraulic oil container 12 through oil circuit respectively, and counterbalance valve 6 is provided with the oil circuit 3 that is communicated with rotary motor 11 repairing mouths 13 with the oil circuit that bypass valve 7 is communicated with rotary motor main valve plug control chamber 10.
When operating principle of the present invention is turned round action about excavator needs; Guide's handle 1 swings; The rotating interface in guide's handle 1 control left and right sides is in open mode; Hydraulic oil flows into shuttle valve 2 and rotary motor main valve plug control chamber 10 through connecting flexible pipe 3,4, opens and closes through spool in the shuttle valve 2 to make hydraulic oil act on the control chamber of counterbalance valve 6 and bypass valve 7 through connection flexible pipe 5 again, improves the opening pressure of counterbalance valve 6 and bypass valve 7.The opening pressure of counterbalance valve 6 is brought up to 3Bar by 1Bar, and the opening pressure of bypass valve 7 is brought up to 5Bar by 3Bar.Under this kind situation, when excavator starts in revolution, can start more stably, reduce hydraulic shock, and during braking, rotary motor 11 return oil pressures improve, and avoid rotary motor 11 emptying phenomenon to occur.But when other move; The rotating interface in guide's handle 1 left and right sides is in closed condition, does not have the hydraulic oil process in the flexible pipe 3,4 of connection shuttle valve 2 and guide's handle, and shuttle valve 2 passes through with also there being pressure oil being connected of counterbalance valve 6, bypass valve 7 in the flexible pipe 5; Promptly there is not hydraulic oil to act on the control chamber of counterbalance valve 6 and bypass valve 7; The opening pressure of counterbalance valve 6 is reduced to 1Bar by 3Bar, and the opening pressure of bypass valve 7 is reduced to 3Bar by 5Bar, and the opening pressure of counterbalance valve 6 and bypass valve 7 reduces.At this moment; The flow through resistance force diminishes of counterbalance valve 6 and bypass valve 7 of the oil return of hydraulic system, promptly the pressure loss of hydraulic system reduces, thereby reduces hydraulic pump 8 power outputs; Reduce the power output of motor 9; Thereby saved fuel oil, reduced discharge amount of exhaust gas, reduced noise, improved efficient, reached the economic effect of energy-conserving and environment-protective.

Claims (1)

1. crawler hypraulic excavator hydraulic control energy saver; It comprises guide's handle, counterbalance valve, bypass valve, hydraulic pump and motor; Said motor is connected with hydraulic pump, and hydraulic pump is communicated with hydraulic oil container, is provided with shuttle valve between left and right two connection flexible pipes of guide's handle; The middle spool that it is characterized in that said shuttle valve is connected with the control chamber of counterbalance valve and bypass valve through connecting flexible pipe, and left and right two connection flexible pipes of guide's handle are connected with the two ends of rotary motor main valve plug control chamber respectively; Said hydraulic pump is connected with rotary motor main valve plug control chamber through oil circuit, and said rotary motor main valve plug control chamber is communicated with rotary motor through oil circuit; The two ends of said counterbalance valve and bypass valve are communicated with rotary motor main valve plug control chamber and hydraulic oil container through oil circuit respectively, and the oil circuit that counterbalance valve and bypass valve are communicated with rotary motor main valve plug control chamber is provided with the oil circuit that is communicated with rotary motor repairing mouth.
CN2012100257632A 2012-02-03 2012-02-03 Hydraulic control energy-saving device of crawler-type hydraulic digging machine Pending CN102535575A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012100257632A CN102535575A (en) 2012-02-03 2012-02-03 Hydraulic control energy-saving device of crawler-type hydraulic digging machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012100257632A CN102535575A (en) 2012-02-03 2012-02-03 Hydraulic control energy-saving device of crawler-type hydraulic digging machine

Publications (1)

Publication Number Publication Date
CN102535575A true CN102535575A (en) 2012-07-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012100257632A Pending CN102535575A (en) 2012-02-03 2012-02-03 Hydraulic control energy-saving device of crawler-type hydraulic digging machine

Country Status (1)

Country Link
CN (1) CN102535575A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102912823A (en) * 2012-11-09 2013-02-06 浙江大学 Rotary energy saving system of excavator
CN103195124A (en) * 2013-04-03 2013-07-10 徐州徐工挖掘机械有限公司 Excavator return oil pressure control loop

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07180190A (en) * 1993-12-22 1995-07-18 Komatsu Ltd Hydraulic circuit preventing back pressure
CN102021927A (en) * 2010-11-10 2011-04-20 三一重机有限公司 Rotary oil supply loop for hydraulic excavator
CN202492880U (en) * 2012-02-03 2012-10-17 山重建机(济宁)有限公司 Hydraulically-controlled energy-saving device for crawler-type hydraulic excavator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07180190A (en) * 1993-12-22 1995-07-18 Komatsu Ltd Hydraulic circuit preventing back pressure
CN102021927A (en) * 2010-11-10 2011-04-20 三一重机有限公司 Rotary oil supply loop for hydraulic excavator
CN202492880U (en) * 2012-02-03 2012-10-17 山重建机(济宁)有限公司 Hydraulically-controlled energy-saving device for crawler-type hydraulic excavator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102912823A (en) * 2012-11-09 2013-02-06 浙江大学 Rotary energy saving system of excavator
CN102912823B (en) * 2012-11-09 2014-10-29 浙江大学 Rotary energy saving system of excavator
CN103195124A (en) * 2013-04-03 2013-07-10 徐州徐工挖掘机械有限公司 Excavator return oil pressure control loop

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Application publication date: 20120704