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Method for determining pressure booster distribution machine parameter under marine diesel ISO condition

A technology of marine diesel engines and superchargers, which is applied in the testing of machines/structural components, testing of engines, instruments, etc., can solve problems such as inability to correctly determine engine configuration parameters, and achieve the effect of improving calculation accuracy

Active Publication Date: 2008-12-24
HUDONG HEAVY MACHINERY
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  • Abstract
  • Description
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the matching parameters under the ISO condition cannot be correctly determined in the prior art, and provide a method for measuring the matching parameters of the supercharger under the ISO condition of the marine diesel engine

Method used

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  • Method for determining pressure booster distribution machine parameter under marine diesel ISO condition
  • Method for determining pressure booster distribution machine parameter under marine diesel ISO condition
  • Method for determining pressure booster distribution machine parameter under marine diesel ISO condition

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Embodiment Construction

[0033] The method for measuring the turbocharger matching parameters of the marine diesel engine under the ISO condition of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention cannot be limited by this.

[0034] Take the 100% load of a machine of 6S60MCC model as an example to calculate.

[0035] Its 100% load parameters are shown in the table below:

[0036] In the table:

[0037]

[0038] 1) 8.8 in the measured data is the default value in the original calculation method; the ISO data is calculated from the turbine end inlet parameters in the measured data.

[0039] 2) The fuel consumption in the measured data is the average value of three minutes of measurement; the ISO data is converted from the measured data of fuel consumption.

[0040] 3) The turbine pressure ratio in the measured data is the ratio of the measured turbine inlet and o...

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Abstract

The invention relates to a measuring method of the matching supercharger parameters of a shipborne diesel engine under ISO condition, which comprises the following steps: the parameters of the diesel engine with 100 percent load under real condition are measured; air consumption under real condition is calculated according to the measured parameters and then converted into air consumption J46 under ISO condition; the absolute value of scavenging air pressure under the real condition G41 is converted into the absolute value J41 of scavenging air pressure under the ISO condition; the pressure ratio K11 of a gas compressor that is corresponding to the running parameters of the diesel engine under ISO condition is calculated; airflow rate J14 and the pressure ratio K11 of the gas compressor that are corresponding to each load of the diesel engine under ISO condition (such as 90 percent, 75 percent and 50 percent) are calculated; matching supercharger points are depicted on a gas compressor property curve according to J14 and K11 and connected into a matching line, and a surge margin Delta is calculated by comparing with the matching line with a surging line 2. The measuring method of the invention can obtain the matching supercharger parameters under ISO condition and provide reference for ship masters and scientific researches, and is easy to determine the matching degree between the supercharger and the diesel engine.

Description

technical field [0001] The invention relates to the calculation and determination of turbocharger configuration parameters-air flow rate and pressure ratio under the ISO condition of low-speed marine diesel engine, and involves the measurement and calculation of performance parameters of low-speed marine diesel engine. Background technique [0002] After the diesel engine is installed on the workshop test platform, performance debugging and product submission testing must be carried out. At present, the performance debugging and product submission of diesel engines use the calculation method of MBD to sort out data and calculate related performance parameters, such as: scavenging pressure, compression pressure, explosion pressure, exhaust temperature, fuel consumption, turbocharger efficiency, air Consumption, etc., and judge the performance of the diesel engine based on these values, and then further adjust, measure, and calculate the diesel engine, and finally adjust until...

Claims

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Application Information

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IPC IPC(8): G01M15/00
Inventor 张端梁刘锋华
Owner HUDONG HEAVY MACHINERY
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