CN101761105B - Power matching method of hydraulic excavator - Google Patents
Power matching method of hydraulic excavator Download PDFInfo
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- CN101761105B CN101761105B CN200910199039XA CN200910199039A CN101761105B CN 101761105 B CN101761105 B CN 101761105B CN 200910199039X A CN200910199039X A CN 200910199039XA CN 200910199039 A CN200910199039 A CN 200910199039A CN 101761105 B CN101761105 B CN 101761105B
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Abstract
The invention relates to a power matching method of a hydraulic excavator, which comprises the following steps: setting a plurality of rotating speeds and outputting different powers according to the known rotating speed of an engine-power characteristic data so as to meet the requirement of different work conditions; the power matching method is characterized in that when the hydraulic excavator works, the method causes that the power of a hydraulic pump and the output power of the engine are matched; when the external load is suddenly added in the working process of the hydraulic excavator, the electric current I of a proportional valve of the hydraulic pump are amplified step by step so that the delivery volume V of the hydraulic pump is amplified step by step and finally the output power of the hydraulic pump is steadily increased; and when the external load is suddenly added in the working process of the hydraulic excavator, the dynamic actual electric current is output by tracking the variation condition of the rotating speed of the engine and the detected real-time pump pressure. The power matching method has the advantages of meeting the operational requirement of the excavator by using the power of the engine, thus achieving the purpose of increasing the operational efficiency and reducing the oil consumption.
Description
Technical field
The present invention relates to a kind of power matching method of hydraulic crawler excavator, be used for the hydraulic system and the dynamic system power coupling of hydraulic crawler excavator, belong to hydraulic excavating mechanomotive force and technical field of hydraulic.
Background technology
The characteristics of the hydraulic power of hydraulic crawler excavator (being the digging machine load) are the saltus step instabilities, and close the United Nations General Assembly with operating mode, and the power of different operating modes is defeated asks different.Reasonably utilizing the power of motor to satisfy the digging machine job requirements, can raise the efficiency on the one hand, also is requirements of saving energy on the other hand.
The power out-put characteristic of motor as shown in Figure 1, during the engine throttle fixed-site, power output is with rotation speed change, is the economical and efficient district of power output back a section of peak power engine speed, can guarantee the output of peak power.
The oil consumption characteristic of motor as shown in Figure 2, A, B... are etc. that oil consumption is than line (oil consumption/power).The A line is above to be general oil consumption district between A-B for low oil consumption district, and the B line is following to be high oil consumption district.Under the engine speed certain condition, the oil consumption of correspondence was than little when power output was high, and promptly certain oil consumption can be exported more power, and relative high efficiency is also fuel-efficient.
Rotating speed one power characteristic of motor (i.e. band carry a characteristic) be outer load when strengthening, and rotating speed descends output torque is increased to be suitable for outer load, corresponding power increase when being higher than power peak rotating speed district.
Above-mentioned is some characteristic introductions of motor, and the method that does not have a kind of maturation so far makes hydraulic crawler excavator on the basis of analyzing above-mentioned characteristic, utilizes the power of motor to satisfy the method for digging machine job requirements.
Summary of the invention
The power matching method that the purpose of this invention is to provide a kind of hydraulic crawler excavator can utilize the power of motor to satisfy the digging machine job requirements, thereby reaches the purpose that improves operating efficiency and reduce oil consumption.
In order to achieve the above object, technical scheme of the present invention has provided a kind of power matching method of hydraulic crawler excavator, and step is:
Step 1, set multiple rotating speed according to known engine speed-power characterization data, the output different capacity, different operating modes are defeated to be asked to satisfy, it is characterized in that,
The present invention is target current I with the maximum ratio valve current value adjustment of hydraulic pump under corresponding rotating speed of hydraulic crawler excavator
Ob, make the power of hydraulic pump and the power output of motor be complementary, can be so that engine speed be stabilized in the high-output power district; And substep increases the proportioning valve electric current I of hydraulic pump, is to make engine speed steady relatively on the one hand, reduces hydraulic shock on the other hand, and it is excessive stably that the responsiveness of machine is had, and makes machine operation soft, balance of movement.
Advantage of the present invention is that the power that makes full use of motor satisfies the digging machine job requirements, thereby reaches the purpose that improves operating efficiency and reduce oil consumption.
Description of drawings
Fig. 1 is the power out-put characteristic figure of motor;
Fig. 2 is the oil consumption characteristic performance plot of motor;
Fig. 3 is an adjusted stepwise current time control chart.
The specific embodiment
Specify the present invention below in conjunction with embodiment.
Embodiment
The power matching method of a kind of hydraulic crawler excavator provided by the invention the steps include:
Step 1, set multiple rotating speed according to known engine speed-power characterization data, the output different capacity, different operating modes are defeated to be asked to satisfy, and is respectively the rotating speed that power output is the 109kW/102kW/97kW/82kW correspondence as setting engine speed;
The real-time rotating speed of step 2.1, detection of engine obtains corresponding engine output according to known engine speed-power parameter, detects the pressure P that obtains hydraulic pump, promptly outer load size simultaneously;
Step 2.2, hydraulic pump power=pressure P * flow Q=pressure P * discharge capacity V* engine speed n=engine output, and the current i * COEFFICIENT K of discharge capacity V=proportioning valve, K measures definite by experiment, and the maximum ratio valve current value adjustment of hydraulic pump under corresponding rotating speed that calculates hydraulic crawler excavator by above-mentioned formula is target current I
Ob
The power matching method of above-mentioned hydraulic crawler excavator is applied in this electric-control system of wheat jade-like stone (MCSS).
Claims (3)
1. the power matching method of a hydraulic crawler excavator, step is:
Step 1, set multiple rotating speed according to known engine speed-power characterization data, the output different capacity to satisfy different operating mode demands, is characterized in that,
Step 2, when hydraulic crawler excavator is worked, be target current I with the maximum ratio valve current value adjustment of hydraulic pump under corresponding rotating speed of hydraulic crawler excavator
Ob, make the power of hydraulic pump and the power output of motor be complementary;
Step 3, in the process of hydraulic crawler excavator work outside the impact during load, substep increases the proportioning valve electric current I of hydraulic pump, makes hydraulic pressure pump delivery V obtain substep and increases, and finally makes the stable output power of hydraulic pump improve;
Step 4, stable when adding outer load in the process of hydraulic crawler excavator work is by the rotation speed change situation of tracking motor and the dynamic deflection value DI that detected real-time pump pressure gauge is calculated the pump electric current
Ob, DI
Ob=k*I
Ob, wherein, k measures definite by experiment, I
ObThe target current that obtains for step 2 is with dynamic current deviant DI
ObTarget current I is added to
ObOn, export dynamic actual current I=(1+k) * I
Ob
2. the power matching method of a kind of hydraulic crawler excavator as claimed in claim 1 is characterized in that, target current I in the described step 2
ObComputational methods be:
The real-time rotating speed of step 2.1, detection of engine obtains corresponding engine output according to known engine speed-power characterization data, detects the pressure P that obtains hydraulic pump, promptly outer load size simultaneously;
Step 2.2, hydraulic pump power=pressure P * flow Q=pressure P * discharge capacity V* engine speed n=engine output, and the current i * COEFFICIENT K of discharge capacity V=proportioning valve, K measures definite by experiment, and the maximum ratio valve current value adjustment of hydraulic pump under corresponding rotating speed that calculates hydraulic crawler excavator by above-mentioned formula is target current I
Ob
3. the power matching method of a kind of hydraulic crawler excavator as claimed in claim 1 is characterized in that, the concrete steps that increase the proportioning valve electric current I of hydraulic pump in the described step 3 step by step are: with at least three time periods of 2 minutes shock load stages, i.e. time period T
1, time period T
2And time period T
3, substep strengthens pump control electric current I, makes to reach target current I in the described step 2 in steady 3 o'clock load stages
Ob, wherein, pump control electric current I is by big step mode, i.e. time period T after the first small step
1Electric current I t1=1/6I
Ob, time period T
2Electric current I t2=1/3I
Ob, time period T
3Electric current I t3=1/2I
Ob
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910199039XA CN101761105B (en) | 2009-11-19 | 2009-11-19 | Power matching method of hydraulic excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910199039XA CN101761105B (en) | 2009-11-19 | 2009-11-19 | Power matching method of hydraulic excavator |
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| Publication Number | Publication Date |
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| CN101761105A CN101761105A (en) | 2010-06-30 |
| CN101761105B true CN101761105B (en) | 2011-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910199039XA Expired - Fee Related CN101761105B (en) | 2009-11-19 | 2009-11-19 | Power matching method of hydraulic excavator |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251546B (en) * | 2011-06-14 | 2013-04-24 | 三一重机有限公司 | Control method for reducing oil consumption of excavator engine |
| CN102505996B (en) * | 2011-11-28 | 2014-06-25 | 上海中联重科桩工机械有限公司 | Power matching system for electronic control engine and volume adjustable hydraulic pump and method |
| CN102776913A (en) * | 2012-07-31 | 2012-11-14 | 龙工（上海）挖掘机制造有限公司 | Power matching method for hydraulic excavator |
| CN102828539B (en) * | 2012-08-16 | 2016-02-10 | 三一重机有限公司 | Variable power of main pump regulating system and method |
| CN102817725A (en) * | 2012-08-22 | 2012-12-12 | 中联重科股份有限公司 | Mobile crane and engine revolution speed control method, engine revolution speed control device and engine revolution speed control system thereof |
| CN103925091B (en) * | 2014-04-09 | 2016-09-07 | 三一汽车起重机械有限公司 | Dynamic power matching process |
| JP7114429B2 (en) * | 2018-09-26 | 2022-08-08 | 日立建機株式会社 | construction machinery |
| CN109538361B (en) * | 2018-11-30 | 2021-04-27 | 恒天九五重工有限公司 | Method for preventing faults generated during loading and starting of engineering machinery |
| CN109990090B (en) * | 2019-03-29 | 2020-07-10 | 长安大学 | Power matching method of engine and hydraulic torque converter for loader |
| JP7368130B2 (en) * | 2019-07-19 | 2023-10-24 | 株式会社小松製作所 | Work machines and work machine control methods |
| CN114384957B (en) * | 2022-01-17 | 2023-04-25 | 雷沃工程机械集团有限公司 | Intelligent control system and method for crushing working condition of excavator |
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2009
- 2009-11-19 CN CN200910199039XA patent/CN101761105B/en not_active Expired - Fee Related
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| CN101761105A (en) | 2010-06-30 |
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