CN102061719A - Excavator overheating protection method - Google Patents

Excavator overheating protection method Download PDF

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Publication number
CN102061719A
CN102061719A CN 201010581062 CN201010581062A CN102061719A CN 102061719 A CN102061719 A CN 102061719A CN 201010581062 CN201010581062 CN 201010581062 CN 201010581062 A CN201010581062 A CN 201010581062A CN 102061719 A CN102061719 A CN 102061719A
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China
Prior art keywords
temperature
main pump
controller
excavator
engine
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Application number
CN 201010581062
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Chinese (zh)
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CN102061719B (en
Inventor
戴晴华
汪春晖
陈少春
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Sany Heavy Machinery Ltd
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Sany Heavy Machinery Ltd
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Publication date
Application filed by Sany Heavy Machinery Ltd filed Critical Sany Heavy Machinery Ltd
Priority to CN2010105810628A priority Critical patent/CN102061719B/en
Publication of CN102061719A publication Critical patent/CN102061719A/en
Application granted granted Critical
Publication of CN102061719B publication Critical patent/CN102061719B/en
Expired - Fee Related legal-status Critical Current
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  • Operation Control Of Excavators (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

The invention dissolves an excavator overheating protection method is characterized by comprising the steps of: detecting water temperature of an engine by a temperature sensor of the engine, transmitting a signal to a controller by the temperature sensor when the water temperature is not less than 103 DEG C, receiving the signal by the controller and sending a signal to control the current of a main pump proportional valve, reducing the power of a main pump by 3 percent, enabling an excavator to continuously work when the temperature is not higher than 100 DEG C after regulation; if the temperature is still high after regulation, judging that the power of the main pump is reduced, and when the reduction reaches 15 percent, controlling the engine to be in an idling state by the controller; and when the reduction is not more than 15 percent, continuously reducing the power of the main power until the engine does not overheat. Int the invention, the temperature is detected by the temperature sensor and the signal is transmitted to the controller, the controller controls the reduction of the power of the main pump, therefore, the temperature of the engine is lowered and normal work is not influenced.

Description

A kind of excavator method for excessive heating protection
Technical field
The present invention relates to a kind of method for excessive heating protection, be specifically related to a kind of engine overheat guard method of excavator.
Background technology
Along with continuous progress in science and technology, in engineering fields such as building, water conservancies, all kinds of construction machineries begin to be used widely, such as excavator, crane, bulldozer or the like, the construction machinery that this class is used for engineering construction is referred to as engineering machinery, and is wherein especially more general with the use of excavator.Excavator mainly is made up of running gear, slewing equipment, driver's cabin, equipment and control (power) device, its power set generally are to adopt Diesel engine as power set, Diesel engine is the internal combustion engine that adopts diesel oil to act as a fuel, chemical energy in the fuel oil is converted into the mechanical energy that drives the vehicle action by burning fuel oil pusher dynamic air cylinder inner carrier as back and forth movement, it has the high advantage of the thermal efficiency, power ratio is big and save diesel oil, thereby is applied in widely in the power set of excavator.
When excavator is worked under the summer high-temperature state, often run into the situation of engine overheat, just more common in the torrid areas that temperature is higher, engine overheat causes engine scuffing easily, cause motor to be damaged, and then influenced the runnability of excavator, and also can delay the duration, influence programming.The reason of the engine overheat of excavator mainly comprises following two kinds, a kind of is the reason of motor self, another kind is the reason of load, when the operator runs into the situation of engine overheat, generally all be by reducing himself rotating speed or reducing its load, spray thereby reduce fuel oil, reduce calorific value, to reach the purpose that reduces the diesel engine temperature.But, if load is reduced too much, then can reduce operating efficiency, the rotating speed of motor is reduced, can lower efficiency equally, thus when reducing load and rotating speed, need control again, when the temperature of motor is recovered within 100 ℃, just should keep present load and rotating speed, in the hope of not influencing operate as normal to greatest extent.
From the above, how when reducing engine temperature, do not influence the operate as normal of excavator again, become in the industry urgency problem to be solved.
Summary of the invention
The object of the invention provides a kind of excavator method for excessive heating protection, uses this method, can not influence operate as normal again when reducing engine temperature.
For achieving the above object, the technical solution used in the present invention is: a kind of excavator method for excessive heating protection, the temperature pick up detection of engine water temperature of motor, when water temperature is not less than 103 ℃, temperature pick up is transferred to controller with signal, the controller received signal is also sent signal controlling main pump proportioning valve electric current, and main pump power is descended 3%, adjust the back temperature be not more than 100 ℃ then excavator work on; Adjust back temperature or high temperature, judge main pump power slippage, be in idling mode when slippage reaches 15% controller control motor, to continue to reduce main pump power not overheated until motor when slippage is not more than 15%.
In the technique scheme, described motor is a Diesel engine, cooperates to be provided with temperature pick up, and described temperature pick up is to utilize the temperature variant rule of the various physical characteristics of material the sensor of temperature transition for electric weight.If the too high meeting of Diesel engine temperature causes the various faults that diminish diesel engine of degradation under motor pull bar, the power, thereby shorten service life of a machine, therefore, the control motor not high temperature be diesel engine utilization and supporting in very important work.The diesel engine temperature is too high, if owing to the reason of thermostat or water tank causes that if minor failure also can adopt the method that suitably reduces load to solve by the sensor of load, warning reminding needs repairing simultaneously; If this failure ratio is more serious, reducing by 15% load can't solve, and so just should shut down solution; The same high temperature that causes owing to the excessive reason of load; also can adopt this method, select 15% as standard, be because under 85% load; still can suitably carry out work; if low again, so just not necessarily can guarantee that machine has normally used, maximum purpose; still guarantee that machine normally uses; detect maintenance when waiting to shut down again, this allows in whole control process, has so just improved economic benefit greatly.
Because the technique scheme utilization, the present invention compared with prior art has following advantage:
1. the present invention is by the temperature pick up detected temperatures, and signal passed to controller, controller descends according to signal controlling main pump power, if high temperature still after adjusting, then controlling main pump power drops to 15% motor and is in idling mode, if it is not overheated until motor that slippage continues to reduce main pump power less than 15%, the signal that gives the alarm simultaneously, thus when reducing engine temperature, do not influence operate as normal again.
Description of drawings
Fig. 1 is the flow chart of the embodiment of the invention one.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is further described:
Embodiment one: referring to shown in Figure 1, a kind of excavator method for excessive heating protection, the temperature pick up detection of engine water temperature of motor, when water temperature is not less than 103 ℃, temperature pick up is transferred to controller with signal, the controller received signal is also sent signal controlling main pump proportioning valve electric current, and main pump power is descended 3%, adjust the back temperature be not more than 100 ℃ then excavator work on; Adjust back temperature or high temperature, judge main pump power slippage, be in idling mode when slippage reaches 15% controller control motor, to continue to reduce main pump power not overheated until motor when slippage is not more than 15%.
When excavator is in normal use, in-engine temperature pick up is monitored engine water temperature in real time, and detection information is passed to the controller of excavator, when temperature pick up detects water temperature and is higher than 103 ℃, temperature pick up passes to controller with this information, controller receives information and handles, send the proportioning valve output current of signal controlling excavator main pump then, thereby the power output of main pump is reduced by 3%, through after the above-mentioned adjustment, temperature pick up continues the detection of engine water temperature, be not more than 100 ℃ words then excavator work on; If it still is higher adjusting the back temperature, controller is judged main pump power drop amount, and controller control motor makes it be in idling when slippage reaches 15%, and it is not overheated up to motor that 15% of slippage less than continues to reduce main pump power.

Claims (1)

1. excavator method for excessive heating protection, it is characterized in that: the temperature pick up detection of engine water temperature of motor, when water temperature is not less than 103 ℃, temperature pick up is transferred to controller with signal, the controller received signal is also sent signal controlling main pump proportioning valve electric current, main pump power is descended 3%, adjust the back temperature be not more than 100 ℃ then excavator work on; Adjust the back temperature still greater than 100 ℃, judge main pump power slippage, be in idling mode when slippage reaches 15% controller control motor, to continue to reduce main pump power not overheated until motor when slippage is not more than 15%.
CN2010105810628A 2010-12-09 2010-12-09 Excavator overheating protection method Expired - Fee Related CN102061719B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010105810628A CN102061719B (en) 2010-12-09 2010-12-09 Excavator overheating protection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010105810628A CN102061719B (en) 2010-12-09 2010-12-09 Excavator overheating protection method

Publications (2)

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CN102061719A true CN102061719A (en) 2011-05-18
CN102061719B CN102061719B (en) 2012-10-31

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102777272A (en) * 2012-07-23 2012-11-14 中联重科股份有限公司渭南分公司 Overload protection control equipment, method and system as well as engineering machine
CN103758629A (en) * 2013-12-25 2014-04-30 柳州正菱集团有限公司 High temperature protecting method for water temperature of engine
CN103883417A (en) * 2014-03-18 2014-06-25 潍柴动力股份有限公司 Method and device for controlling temperature of engine
CN110735712A (en) * 2019-11-07 2020-01-31 徐州众信矿业科技有限公司 mining equipment engine temperature detection and adjustment device and method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3308019B2 (en) * 1993-03-01 2002-07-29 日立建機株式会社 Hydraulic control device for hydraulic construction machinery
CN1401057A (en) * 2000-12-18 2003-03-05 日立建机株式会社 Control device for construction machine
JP2005188433A (en) * 2003-12-26 2005-07-14 Hitachi Constr Mach Co Ltd Engine protecting device for construction machine
JP2005290891A (en) * 2004-04-01 2005-10-20 Shin Caterpillar Mitsubishi Ltd Overheating prevention system for working machinery
DE102005043110A1 (en) * 2005-09-10 2007-04-12 Terex Gmbh Method for controlling hydraulic fluid temperature especially in excavator with electronic temperature sensor and electro hydraulic flow control valve
JP2009303365A (en) * 2008-06-12 2009-12-24 Hitachi Constr Mach Co Ltd Protection device of electric motor and electromotive hydraulic excavator
CN101974926A (en) * 2010-09-29 2011-02-16 三一重机有限公司 Oil returning system capable of automatically controlling hydraulic oil temperature used for excavator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3308019B2 (en) * 1993-03-01 2002-07-29 日立建機株式会社 Hydraulic control device for hydraulic construction machinery
CN1401057A (en) * 2000-12-18 2003-03-05 日立建机株式会社 Control device for construction machine
JP2005188433A (en) * 2003-12-26 2005-07-14 Hitachi Constr Mach Co Ltd Engine protecting device for construction machine
JP2005290891A (en) * 2004-04-01 2005-10-20 Shin Caterpillar Mitsubishi Ltd Overheating prevention system for working machinery
DE102005043110A1 (en) * 2005-09-10 2007-04-12 Terex Gmbh Method for controlling hydraulic fluid temperature especially in excavator with electronic temperature sensor and electro hydraulic flow control valve
JP2009303365A (en) * 2008-06-12 2009-12-24 Hitachi Constr Mach Co Ltd Protection device of electric motor and electromotive hydraulic excavator
CN101974926A (en) * 2010-09-29 2011-02-16 三一重机有限公司 Oil returning system capable of automatically controlling hydraulic oil temperature used for excavator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
《工程机械》 20080110 姜楠等 YS220型履带式液压挖掘机的技术创新特点 第4页第2.1节至第6页第2.3节 1 , 第01期 2 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102777272A (en) * 2012-07-23 2012-11-14 中联重科股份有限公司渭南分公司 Overload protection control equipment, method and system as well as engineering machine
CN103758629A (en) * 2013-12-25 2014-04-30 柳州正菱集团有限公司 High temperature protecting method for water temperature of engine
CN103758629B (en) * 2013-12-25 2017-08-08 柳州正菱集团有限公司 Digger engine water temperature high-temperature protection method
CN103883417A (en) * 2014-03-18 2014-06-25 潍柴动力股份有限公司 Method and device for controlling temperature of engine
CN110735712A (en) * 2019-11-07 2020-01-31 徐州众信矿业科技有限公司 mining equipment engine temperature detection and adjustment device and method

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