CN104534503A - Automatic altitude and temperature correcting control method for diesel combustor - Google Patents
Automatic altitude and temperature correcting control method for diesel combustor Download PDFInfo
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- CN104534503A CN104534503A CN201410807399.4A CN201410807399A CN104534503A CN 104534503 A CN104534503 A CN 104534503A CN 201410807399 A CN201410807399 A CN 201410807399A CN 104534503 A CN104534503 A CN 104534503A
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Abstract
The invention discloses an automatic altitude and temperature correcting control method for a diesel combustor. The polyline fitting algorithm is utilized for carrying out fitting correction on the density value of air entering the combustor according to the effect of the temperature and the altitude to the air density, the rotating speed of a draught fan is determined, the real volume of air entering the combustor is worked out, and accordingly the corresponding optimal diesel supply amount is worked out. According to the method, it is guaranteed that the air and oil ratio of the diesel combustor is in a theoretical optimal range all the time, and a guarantee is provided for the optimal combustion efficiency.
Description
Technical field
The present invention is applicable to the control of diesel fuel burner, includes but not limited to above-mentioned field.
Background technology
The gas oil ratio control mode that current diesel fuel burner uses generally adopts declared working condition to configure, when the operating mode of burner is away from declared working condition, only do little accommodation or substantially without adjustment, cause the wind-oil match ratio of burner away from theoretical optimal value, also away from declared working condition design point.Especially, when temperature and height above sea level change, the density of air there occurs change---and as along with the rising of temperature and the rising of height above sea level, atmospheric density reduces, and same volume intake then can cause total blast volume not enough.
But generally can not ensure that burner long-term work is under its design conditions, the situation that the duty of burner is not in its rated designs point is more common, this causes the working condition of burner bad, and fired state is not good, and efficiency of combustion is low and pollutant emission is higher.
Summary of the invention
According to air density change, automatically adjust air quantity, principle that oil mass reaches best quantity delivered.
Determine that the main cause of burner combustion power and efficiency of combustion is the mode in wind supply quantity and air feed.And for the complete burner of design, wind supply quantity plays again conclusive effect.The present invention is just according to temperature, the impact on atmospheric density above sea level, adopt polyline fitting algorithm, matching correction is carried out to the air quantity entering burner, tables look-up and calculate the air quantity truly entering burner, and then calculate corresponding best diesel oil quantity delivered for it.
A kind of height above sea level of diesel fuel burner, temperature self-correction control method, the present invention is characterised in that, the method is according to temperature, the impact on atmospheric density above sea level, adopt polyline fitting algorithm, matching correction is carried out to the atmospheric density numerical value entering burner, and determine rotation speed of fan, calculate the air quantity truly entering burner, and then calculate corresponding best diesel oil quantity delivered;
Described polyline fitting algorithm, namely adopts the linear curve fit atmospheric density of multistage with the complex nonlinear rule of height above sea level and variations in temperature; After environment height above sea level and temperature parameter are determined, above-mentioned two parameters can be substituted in corresponding applicable linearity curve computing formula, thus the atmospheric density corrected Calculation value under trying to achieve respective conditions;
The described Wind Coverage Calculation entering burner, for motor often revolve turn around intake and blower motor rotating speed long-pending;
The calculating of described diesel oil quantity delivered, every pulse oil inlet quantity of oil pump is again basic fixing, the long-pending quantity delivered that be unit interval in operating frequency in time per unit.
Above-mentioned so-called polyline fitting algorithm, namely adopts approximating method, by the real change trend of multistage linear curve intake with rotation speed of fan, height above sea level, temperature three variablees.Look-up table is the method for another kind of estimation atmospheric density, namely in memory, the numerical value of atmospheric density under Different Altitude and temperature conditions is made data query table, namely inquire about in advance when the burner is in operation and correction air density values, calculate thus and determine rotation speed of fan, ensureing air quantity supply.
This section of height above sea level, temperature self-correction control algolithm are placed in the burner control routine starting stage, after boot system completes self-inspection, namely implement this section of intelligent control algorithm program, and then system enters the successive procedure such as normal ignition after completing and tabling look-up, calculate, revise.
implementation result:
This algorithm ensure that diesel fuel burner wind-oil match ratio is in theoretical optimum range all the time, provides guarantee for efficiency of combustion is in the best all the time.
Accompanying drawing explanation
Fig. 1 is method flow diagram of the present invention.
Detailed description of the invention
As Fig. 1, a kind of height above sea level of diesel fuel burner, temperature self-correction control method, the present invention is characterised in that, the method is according to temperature, the impact on atmospheric density above sea level, adopt polyline fitting algorithm, matching correction is carried out to the atmospheric density numerical value entering burner, and determines rotation speed of fan, calculate the air quantity truly entering burner, and then calculate corresponding best diesel oil quantity delivered;
Described polyline fitting algorithm, namely adopts the linear curve fit atmospheric density of multistage with the complex nonlinear rule of height above sea level and variations in temperature; After environment height above sea level and temperature parameter are determined, above-mentioned two parameters can be substituted in corresponding applicable linearity curve computing formula, thus the atmospheric density corrected Calculation value under trying to achieve respective conditions;
The described Wind Coverage Calculation entering burner, for motor often revolve turn around intake and blower motor rotating speed long-pending;
The calculating of described diesel oil quantity delivered, every pulse oil inlet quantity of oil pump is again basic fixing, the long-pending quantity delivered that be unit interval in operating frequency in time per unit.
Specific features of the present invention:
conversion relation between blower fan intake and blower motor rotating speed, explains containing the compensation method revised altitude change and variations in temperature
The motor speed of blower fan intake and blower fan is directly proportional, and flabellum blade profile and the air channel back pressure of the intake that blower motor often turns around and blower fan are closely related, and is exactly briefly relevant with blower fan and blower fan applied environment, this be by blower fan and environment for use determined.Because environment for use is determined, blower fan is determined, the air quantity that the motor of blower fan often turns around also is determined, so the linear relationship under just can being based upon certain density conditions between intake and the motor speed of blower fan.
Be it can also be seen that by above-mentioned explanation link, if atmospheric density there occurs change, then still likely cause actual intake to change, so need to consider the changing factor of density.And cause the principal element of air density change to be pressure and temperature, when pressure reduces or temperature raises, all cause atmospheric density to decline; Contrary then cause atmospheric density to rise.Air pressure variations maximum effect factor under atmospheric environment is height above sea level, so for the numerical value of atmospheric density under certain height above sea level and temperature conditions, can work out a form according to the empirical data of environment temperature and height above sea level, for inquiring about and providing reference.After environment height above sea level and temperature are determined, the density of air then according to height above sea level and the temperature conditions of correspondence, with the most similar Query Result for reference to carrying out calculating and revising.This concrete calculating and modification method a lot, can the calculating such as cross-correlation method be adopted.
Can also fitting process be adopted, namely adopt the linear curve fit atmospheric density of multistage with the complex nonlinear rule of height above sea level and variations in temperature.After environment height above sea level and temperature parameter are determined, height above sea level and temperature parameter can be substituted in corresponding applicable linearity curve computing formula, thus the atmospheric density correction value under trying to achieve respective conditions.
The total wind supply quantity of blower fan calculates, and amasss with blower motor rotating speed is for motor often revolves the intake that turns around.
about the computational methods of oil pump feed amount
About the calculating of fuel delivery, every pulse oil inlet quantity of oil pump is again basic fixing, the long-pending pump oil mass that be unit interval in operating frequency in time per unit.
about the guideline of the matching relationship between wind-oil match ratio
About the basis of fuel delivery, can be 1.2 ~ 1.4 to allocate with reference to the best actual wind oil equivalent proportioning of diesel combustion.When real work excess air ratio is less than 1.2, then reduces fuel delivery or strengthen wind supply quantity; When real work excess air ratio is greater than 1.4, then strengthens fuel delivery or reduce wind supply quantity.
about the explanation of polyline fitting process or look-up table
As previously mentioned, atmospheric density, by various factors, presents non-linear rule.Use a complicated algorithm accurately to describe the density of air, engineering there is no need.Conventional following two kinds of algorithms carry out the engineering calculation numerical value of approximate calculation atmospheric density.
Polyline fitting algorithm, namely adopts the linear curve fit atmospheric density of multistage with the complex nonlinear rule of height above sea level and variations in temperature.After environment height above sea level and temperature parameter are determined, above-mentioned two parameters can be substituted in corresponding applicable linearity curve computing formula, thus the atmospheric density corrected Calculation value under trying to achieve respective conditions.
Look-up table is the method for another kind of estimation atmospheric density, namely in memory, the numerical value of atmospheric density under Different Altitude and temperature conditions is made data query table, namely inquire about in advance when the burner is in operation and correction air density values, after environment height above sea level and temperature are determined, the density of air then according to height above sea level and the temperature conditions of correspondence, with the most similar Query Result for reference to carrying out calculating and revising.This concrete calculating and modification method a lot, the estimations such as contiguous point value cross-correlation method can be adopted.
conversion relation between rotation speed of fan and operation of oil pump frequency
By noted earlier, we can obtain such concept, under the system namely determined and environment for use condition, can know definite blower fan intake information by the rotating speed of blower motor.According to wind, oily matching relationship, the best pump oil mass of oil pump is also determined.
In the every pulse of known oil pump under oil condition, only need the operating frequency determining oil pump.
Namely the numerical relation between blower motor rotating speed and operation of oil pump frequency is determined.In actual engineering use procedure, namely by setting up the conversion relation that a linear relation is determined between the two, also can add some correction factor.
This relational expression is closely related with buner system and operation of oil pump characteristic, when more scavenge oil pump or blower fan, or during the use back pressure situation of adjustment burner, conversion relation formula all can be made to change.Here inconvenience provide definite equation because they and be not suitable for all situations, only can provide explanatory note here.
Claims (1)
1. height above sea level, the temperature self-correction control method of a diesel fuel burner, it is characterized in that, the method is according to temperature, the impact on atmospheric density above sea level, adopt polyline fitting algorithm, matching correction is carried out to the atmospheric density numerical value entering burner, and determine rotation speed of fan, calculate the air quantity truly entering burner, and then calculate corresponding best diesel oil quantity delivered;
Described polyline fitting algorithm, namely adopts the linear curve fit atmospheric density of multistage with the complex nonlinear rule of height above sea level and variations in temperature; After environment height above sea level and temperature parameter are determined, above-mentioned two parameters can be substituted in corresponding applicable linearity curve computing formula, thus the atmospheric density corrected Calculation value under trying to achieve respective conditions;
The described air quantity entering burner be motor often revolve turn around intake and blower motor rotating speed long-pending;
The calculating of described diesel oil quantity delivered, the long-pending quantity delivered be in the unit interval of operating frequency in every pulse oil inlet quantity of oil pump and time per unit; Wherein, every pulse oil inlet quantity of oil pump is again basic fixing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410807399.4A CN104534503A (en) | 2014-12-23 | 2014-12-23 | Automatic altitude and temperature correcting control method for diesel combustor |
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| CN201410807399.4A CN104534503A (en) | 2014-12-23 | 2014-12-23 | Automatic altitude and temperature correcting control method for diesel combustor |
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| CN104534503A true CN104534503A (en) | 2015-04-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018107366A1 (en) * | 2016-12-13 | 2018-06-21 | 中车株洲电力机车有限公司 | Traction fan cooling air volume adjusting method and device |
| CN114046528A (en) * | 2021-11-02 | 2022-02-15 | 中国船舶重工集团公司第七0三研究所 | Boiler fuel temperature control method |
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| US5634786A (en) * | 1994-11-30 | 1997-06-03 | North American Manufacturing Company | Integrated fuel/air ratio control system |
| CN101135460A (en) * | 2006-08-30 | 2008-03-05 | 三浦工业株式会社 | Boiler and combustion control method |
| CN101691930A (en) * | 2009-10-20 | 2010-04-07 | 云南航天工业总公司 | Output power control method of combustion apparatus |
| CN102353072A (en) * | 2011-10-24 | 2012-02-15 | 云南航天工业总公司 | Method for controlling output power of diesel combustor and device thereof |
| CN202281246U (en) * | 2011-10-24 | 2012-06-20 | 云南航天工业总公司 | Control device adopted in diesel burner output power control method |
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2014
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5634786A (en) * | 1994-11-30 | 1997-06-03 | North American Manufacturing Company | Integrated fuel/air ratio control system |
| CN101135460A (en) * | 2006-08-30 | 2008-03-05 | 三浦工业株式会社 | Boiler and combustion control method |
| CN101691930A (en) * | 2009-10-20 | 2010-04-07 | 云南航天工业总公司 | Output power control method of combustion apparatus |
| CN102353072A (en) * | 2011-10-24 | 2012-02-15 | 云南航天工业总公司 | Method for controlling output power of diesel combustor and device thereof |
| CN202281246U (en) * | 2011-10-24 | 2012-06-20 | 云南航天工业总公司 | Control device adopted in diesel burner output power control method |
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| 谢语权等: "自分段线性拟合法及其应用", 《工业仪表与自动化装置》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018107366A1 (en) * | 2016-12-13 | 2018-06-21 | 中车株洲电力机车有限公司 | Traction fan cooling air volume adjusting method and device |
| CN114046528A (en) * | 2021-11-02 | 2022-02-15 | 中国船舶重工集团公司第七0三研究所 | Boiler fuel temperature control method |
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Application publication date: 20150422 |