CN106436810B - A kind of matching excavator power method - Google Patents
A kind of matching excavator power method Download PDFInfo
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- CN106436810B CN106436810B CN201610963890.5A CN201610963890A CN106436810B CN 106436810 B CN106436810 B CN 106436810B CN 201610963890 A CN201610963890 A CN 201610963890A CN 106436810 B CN106436810 B CN 106436810B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2246—Control of prime movers, e.g. depending on the hydraulic load of work tools
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention discloses a kind of matching excavator power method and system, the matching excavator power system includes host controller, and the host controller is connected by conducting wire with the proportion magnetic valve on engine assembly, instrument assembly, operation range driver plate, action phase detection sensor group, one pressure transmitter of pump, second pressure transmitter and main pump；The engine assembly is connected by shaft coupling with main pump, and two pressure transmitters of one pressure transmitter of pump and pump are provided on main pump, and the main pump is connected by hydraulic circuit with load.The present invention can make engine, using optimal revolving speed, using optimal torque, engine operation be allowed on optimal performance point, fuel economy to be made to be greatly improved in this way when corresponding to the load stage according to the size of load.
Description
Technical field
The present invention relates to a kind of matching excavator power method and system, belong to hydraulic crawler excavator technical field.
Background technique
Existing matching excavator power system, for mechanical engine, only one specified torque or power curve,
For electric spraying type engine, then different torque or power curve is set by the heavy duty of load weight difference point, economy, weight, bears
Lighter mode is carried, numerical value is lower, the fuel economy of engine when improving different loads.This three curves are in same rotating speed
Under torque or power be different.
For engine, only one bearing power or the economy of torque are best under certain revolving speed, as long as
The load of engine is certain, and the best revolving speed point of performance and torque point are with regard to only one.The above-mentioned a plurality of performance curve the case where
Under, in a certain revolving speed of engine, there is that the setting value of a curve is more excellent than the setting value of another two curves certainly, and also not
It must be optimal value.So although comparing mechanical engine according to a plurality of torque of load weight difference setting or power curve
Single 100% performance curve economy to get well, but also there was only very limited promotion.
Summary of the invention
The object of the present invention is to provide a kind of matching excavator power method and system, to make engine according to negative
The size of load uses optimal revolving speed, using optimal torque, makes engine operation optimal when corresponding to the load stage
On performance point, fuel economy can be made to be greatly improved in this way.
A kind of technical solution of the present invention: matching excavator power method, comprising the following steps:
(1) the nominal load power demand of each working stage under each operation range of each dynamic mode of excavator is set first,
Then the power demand of main pump, the power demand of power demand and engine accessory power rating further according to main pump are calculated according to bearing power
The power for matching main pump and engine, determines the engine speed under the operating condition further according to engine consumption figure, makes engine work
Make in low oil consumption area；
(2) the specified control electricity of the main pump under the operating condition is calculated according to the engine speed of the power demand of main pump and determination
Stream makes the power and load matched of main pump, while being calculated according to the power demand of the power demand of main pump and engine accessory power rating etc.
The torque demand and accessory torque demand of main pump；
(3) EFI is arranged according to the torque demand of the torque demand of the main pump under determining revolving speed and engine accessory power rating to start
Nominal torque value of the machine under the revolving speed, and finally obtain a best torque curve, it is desirable that engine producer is in engine control
Above-mentioned best torque curve is added in the program of device processed, excavator is when carrying out power match, the engine under each dynamic mode
All use above-mentioned best torque curve.
In the above method, in operation handle attonity, a base current is only given, certain energy-saving effect is played；If having
Movement, using 500~1000ms time elevator pump proportion magnetic valve control electric current arrive rated current, to avoid movement initially
It is excessive that moment falls speed.
In the above method, the host controller on engine judges the work under current working according to the data in relation to sensor
Which make in the stage, host controller reads from engine controller and works under the real-time torque percentage of engine and the operating condition
The best torque in stage is compared, and reduces pump electric current then if more than best torque to reduce load, and real-time torque is made to be equal to best turn round
Square avoids engine overload.
In the above method, if the real-time torque percentage of engine is less than best torque, and pump pressure has been greater than pressure regulation power, then
Increasing pump electric current makes real-time torque reach best torque；If pump pressure has been less than pressure regulation power, do not adjust.
Meanwhile the present invention also provides a kind of matching excavator power systems for realizing the above method, including host control
Device processed, the host controller are passed by conducting wire and engine assembly, instrument assembly, operation range driver plate, action phase detection
Proportion magnetic valve on sensor group, one pressure transmitter of pump, two pressure transmitters of pump and main pump is connected；The engine assembly
It is connected by shaft coupling with main pump, two pressure transmitters of one pressure transmitter of pump and pump, the main pump is provided on main pump
It is connected by hydraulic circuit with load.
In above-mentioned matching excavator power system, the engine assembly is connect with engine controller.
In above-mentioned matching excavator power system, the instrument assembly is keyed by control line and model selection.
Due to the adoption of the above technical scheme, the present invention has the advantages that the present invention is according to each work of each dynamic mode of excavator
Make the nominal load power demand of each working stage under gear to calculate pump power demand, further according to pump power demand and engine
The power demand of attachment etc., the power of matching pump and engine, determines the engine under the operating condition further according to engine consumption figure
Revolving speed makes engine operation in low oil consumption area；Then it is calculated under the operating condition according to the engine speed of pump power demand and determination
The specified control electric current of pump, make the power and load matched of pump, while according to the power of pump power demand and engine accessory power rating etc.
Demand calculates the torque demand and accessory torque demand of pump；Finally according under determining revolving speed pump torque demand and engine it is attached
Nominal torque value of the torque demand setting EFI engine of part etc. under the revolving speed, and finally obtain a best torque song
Line, it is desirable that engine producer adds above-mentioned best torque curve in its control, when carrying out power match, each power of excavator
Engine all uses above-mentioned best torque curve under mode.Therefore, the present invention can make engine according to the size of load using most
Good revolving speed, using optimal torque, allow engine operation when corresponding to the load stage on optimal performance point, such energy
Fuel economy is set to be greatly improved.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of matching excavator power system of the invention；
Fig. 2 is the flow chart of matching excavator power method of the invention.
Description of symbols: 1- host controller, 2- electric-control motor, 3- instrument assembly, 4- operation range driver plate, 5-
Action phase detection sensor group, 6- pump a pressure transmitter, and 7- pumps two pressure transmitters, and 8- pumps proportion magnetic valve, and 9- is loaded,
10- engine controller, 11- mode selecting key, 12- main pump.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and examples to this hair
It is bright to be described in further detail.
The embodiment of the present invention: the structural schematic diagram of matching excavator power system of the invention is as shown in Figure 1, include master
Machine controller 1, the host controller 1 pass through conducting wire and electric-control motor 2, instrument assembly 3, operation range driver plate 4, movement rank
Pump proportion magnetic valve 8 on section detection sensor group 5, one pressure transmitter 6 of pump, two pressure transmitters 7 of pump and main pump 12 is connected
It connects；The electric-control motor 2 is connected by shaft coupling with main pump 12, while electric-control motor 2 and engine controller 10 connect
Connect, be provided with two pressure transmitters 7 of one pressure transmitter 6 of pump and pump on main pump 12, the main pump 12 by hydraulic circuit with
Load 9 is connected；The instrument assembly 3 is connect by control line with mode selecting key 11.
When carrying out matching excavator power using above-mentioned matching excavator power system, following steps progress can be used:
(1) first Setting pattern selection key 11 in each mode, each work of the operation range driver plate 4 under each operation range
The nominal load power demand in stage, such as: economic model, 8 grades, excavation phase is set as 160KW, then further calculates
Obtaining the power demand that main pump 12 need to be asked for electric-control motor 2 is 168KW, asks for the hair such as fan, compressor of air conditioner to producer
The general power of motivation attachment is 20KW, and the bearing power of electric-control motor 2 is 188KW at this time, is determined according to engine consumption figure
The most economical revolving speed of electric-control motor 2 under the operating condition is 1700 revs/min, makes the work of electric-control motor 2 in low oil consumption area；
(2) it according to 1700 revs/min of revolving speed of the power demand 168KW of main pump 12 and the electric-control motor 2 of determination, calculates
The specified control electric current for obtaining the pump proportion magnetic valve 8 under the operating condition on main pump 12 is 565mA, makes power and the load 9 of main pump 12
Matching, while being according to the torque demand that the power demand of the power demand of main pump 12 and engine accessory power rating etc. calculates main pump 12
944Nm, accessory torque demand 95Nm；
(3) according under the revolving speed of determining electric-control motor 2, the torque demand of main pump 12 and the torque of engine accessory power rating are needed
It asks to obtain nominal torque value of the electric-control motor 2 under the revolving speed to be 1039Nm, equally, the power under other each operating conditions is set,
It calculates to correspond to the torque value under revolving speed, each torque value is linked up to obtain a best torque curve, when carrying out power match,
Excavator electric-control motor 2 under each mode that mode selecting key 11 selects all uses above-mentioned best torque curve.
(4) it is linked up with engine producer, is that the above-mentioned best torque control of program increase by one of engine controller 10 is bent
Line；
(5) engine speed under each working stage of each each operation range of dynamic mode and pump control current value are set
Table；
(6) program of host controller 1 is set as regardless of all controlling to engine in what mode, gear, working stage
Device 10 issues the instruction for calling above-mentioned best torque curve；
(7) host controller 1 passes through mode select signal, the work shelves that instrument assembly 3 transmits according to mode selecting key 11
The position gear selection signal transmitted of driver plate 4 and the working stage signal checked according to action phase detection sensor group 5 call
The electric current of the revolving speed and pump proportion magnetic valve 8 of corresponding revolving speed and current value control engine 2.
(8) host controller 1 is arranged in operation handle attonity, only gives a base current, plays certain energy conservation effect
Fruit, if there is movement, using 500~1000ms time elevator pump proportion magnetic valve 8 control electric current to rated current, to avoid
It is excessive that movement initial instant falls speed.
(9) host controller 1 judges the work under current working according to the data that action phase detection sensor group 5 detects
Which make in the stage, host controller 1 reads the real-time torque percentage and the work of engine 2 from engine controller 10
Best torque value under the revolving speed that working stage determines under condition is compared, and then reduces pump proportion magnetic valve 8 if more than best torque
Electric current makes real-time torque be equal to best torque to reduce load, and engine 2 is avoided to overload.
If real-time torque percentage is less than best torque, and pumps a pressure transmitter 6 or pump two pressure transmitters 7 and detect
Pressure be greater than pressure regulation power, then the electric current of increasing pump proportion magnetic valve 8, makes real-time torque reach best torque；If being less than
Pressure regulation power, then do not adjust.
Claims (4)
1. a kind of matching excavator power method, it is characterised in that the following steps are included:
(1) the nominal load power demand of each working stage under each operation range of each dynamic mode of excavator is set first, then
The power demand of main pump, the power demand matching of power demand and engine accessory power rating further according to main pump are calculated according to bearing power
The power of main pump and engine determines the engine speed further according to engine consumption figure, makes engine operation in low oil consumption area；
(2) the specified control electric current that the main pump is calculated according to the engine speed of the power demand of main pump and determination, makes main pump
Power and load matched, while according to the torque demand of the power demand of the power demand of main pump and engine accessory power rating calculating main pump
With accessory torque demand；
(3) EFI engine is arranged according to the torque demand of the torque demand of the main pump under determining revolving speed and engine accessory power rating to exist
Nominal torque value under the revolving speed, and finally obtain a best torque curve, it is desirable that engine producer is in engine controller
Program in add above-mentioned best torque curve, when carrying out power match, engine all makes excavator under each dynamic mode
With above-mentioned best torque curve.
2. matching excavator power method according to claim 1, it is characterised in that: in operation handle attonity, only
To a base current, certain energy-saving effect is played；If there is movement, the time elevator pump ratio electromagnetism of 500~1000ms is used
The control electric current of valve falls fast excessive to rated current to avoid movement initial instant.
3. matching excavator power method according to claim 1, it is characterised in that: the host controller root on engine
Judge which stage the work under current working is according to the data in relation to sensor, host controller is read from engine controller
Take the real-time torque of engine compared with the best torque of working stage under the operating condition, if more than best torque then reduce pump electric current with
Reduce load, so that real-time torque is equal to best torque, avoid engine overload.
4. matching excavator power method according to claim 1, it is characterised in that: if the real-time torque of engine is less than most
Good torque, and pump pressure has been greater than pressure regulation power, then increasing pump electric current, makes real-time torque reach best torque；If pump pressure is less than
Pressure regulation power is played, then is not adjusted.
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| CN201610963890.5A CN106436810B (en) | 2016-10-28 | 2016-10-28 | A kind of matching excavator power method |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107642121B (en) * | 2017-09-13 | 2020-12-04 | 上海华兴数字科技有限公司 | Energy-saving prompt control method and system for excavator |
| CN108104191B (en) * | 2017-12-21 | 2020-07-21 | 柳州柳工挖掘机有限公司 | Intelligent control method for working gear of excavator |
| CN108561234B (en) * | 2018-04-03 | 2020-08-25 | 徐工集团工程机械股份有限公司 | Mechanical driving road roller control system with torque limiting protection and control method thereof |
| CN110258709B (en) * | 2019-07-08 | 2021-07-30 | 山重建机有限公司 | Method for automatically matching different working conditions of excavator |
| CN110965607B (en) * | 2019-12-17 | 2022-02-08 | 上海华兴数字科技有限公司 | Excavator engine control method and system |
| CN113062397B (en) * | 2021-03-26 | 2022-05-10 | 大连理工大学 | Power matching rule base-based power matching method for excavator |
| CN114396375B (en) * | 2022-02-22 | 2023-12-22 | 贵州詹阳动力重工有限公司 | Limiting power control method of electric chemical engineering machinery |
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