CN-116841326-B - Flow velocity debugging method and system for ship oil system

CN116841326BCN 116841326 BCN116841326 BCN 116841326BCN-116841326-B

Abstract

The invention discloses a flow velocity debugging method and a flow velocity debugging system for a ship oil system, wherein the debugging method comprises the steps of constructing a pipe network model of the ship oil system, wherein various components in the pipe network model comprise pipelines and valves; setting data parameters of components in a pipeline model, setting the resistance coefficient of a valve to be minimum, setting the resistance coefficient of the valve to be a first valve resistance coefficient, calculating a first Reynolds number of each section of pipeline fluid according to the set value of the data parameters and the minimum resistance coefficient of the valve, comparing the first Reynolds number with a preset range, judging whether the first Reynolds number is in the preset range, acquiring a second valve resistance coefficient of each valve according to the Reynolds number in the preset range, and calculating the opening of the first valve according to a resistance coefficient-valve opening curve and the second valve resistance coefficient. According to the invention, the oil flow velocity of the pipeline system is simulated and adjusted, so that the oil flow series washing of all pipelines is ensured to be efficiently completed, and the problem of overlong oil series washing period of the actual ship in the later period is avoided.

Inventors

BAI BING
Bian Xiutao
HOU FEI
Shan Rongjie
ZHANG ZHONGBIN
YANG GONGAN

Assignees

江南造船(集团)有限责任公司

Dates

Publication Date: 20260512
Application Date: 20230629

Claims (9)

1. A flow rate tuning method for a marine oil system, comprising: S1, constructing a pipe network model of a ship oil system, wherein the pipe network model comprises various components, and the components comprise pipelines and valves; S2, setting data parameters and fluid parameters of various components in a pipeline model, and setting the resistance coefficient of the valve to be minimum, wherein the resistance coefficient corresponding to the valve is a first valve resistance coefficient; S3, calculating the Reynolds number Re of the fluid of each section of pipeline according to the set value of the data parameter, the set value of the fluid parameter and the first valve resistance coefficient, and recording the Reynolds number Re as a first Reynolds number; S4, comparing the first Reynolds number with a preset Reynolds number range, judging whether the first Reynolds number is in the preset range, and acquiring a second valve resistance coefficient of each valve according to the Reynolds number in the preset range, wherein the step of judging whether the first Reynolds number is in the preset range comprises the following steps: when the first Reynolds number is in a preset range, the first valve resistance coefficient is the second valve resistance coefficient; When the first Reynolds number is not in the preset range, setting the Reynolds number of each pipeline in the preset range, defining the Reynolds number set in the preset range as a second Reynolds number, and calculating the second valve resistance coefficient of each valve according to the second Reynolds number; And S5, acquiring a first valve opening for guiding the operation of the on-site valve according to the resistance coefficient-valve opening curve and the second valve resistance coefficient.
2. The flow rate tuning method of claim 1, wherein the step of calculating a second valve drag coefficient for each valve based on the second reynolds number comprises: if the trial calculation is successful, the resistance coefficient of each valve which is successfully solved is the acquired second valve resistance coefficient of each valve; If the trial calculation fails, the pipeline system of the pipeline model is required to be adjusted, and the steps S1-S4 are repeated until the second valve resistance coefficient of each valve is obtained.
3. The flow rate adjustment method according to claim 1, characterized by further comprising, after the first valve opening is obtained: S6, applying the first valve opening to an actual ship pipeline system to obtain an actual flow value; And S7, calculating an error value according to the actual flow value and a model flow value corresponding to the first valve opening, and judging whether to execute the first valve opening or determining the final execution valve opening according to the magnitude of the error value.
4. A flow rate debugging method according to claim 3, wherein in the step of judging whether to execute the first valve opening or determining to finally execute the valve opening according to the magnitude of the error value, further comprising: When the error value is in the error range, the first valve opening is the final execution valve opening; And when the error value is not in the error range, correcting the data parameters of the pipeline, the pipeline accessories and the equipment in the pipeline model, and re-executing the steps S1-S7 until the error value is in the error range, acquiring the second valve opening, and finally executing the valve opening.
5. A flow rate debugging method according to claim 3, further comprising, after the step of judging whether to execute the first valve opening or determining to finally execute the valve opening according to the magnitude of the error value: Executing the final execution valve opening in an actual ship pipeline system, acquiring an actual resistance coefficient, and recording the actual resistance coefficient as a third valve resistance coefficient; and correcting the resistance coefficient-valve opening curve according to the final execution valve opening and the third valve resistance coefficient.
6. The flow rate adjustment method according to claim 5, wherein the step of obtaining the third valve resistance coefficient includes: The third valve drag coefficient is calculated by pressure difference readings of pressure sensors provided in the actual ship piping system.
7. A flow rate commissioning system, comprising: the pipe network model construction module is used for constructing a pipe network model according to an actual ship pipeline system; the data parameter setting module is used for setting data parameters and fluid parameters of various components in the pipe network model, setting the resistance coefficient of the valve to be minimum, and setting the resistance coefficient corresponding to the valve to be a first valve resistance coefficient at the moment; the Reynolds number calculation module is used for calculating a first Reynolds number in each section of pipeline according to the data parameters and the first valve resistance coefficient; The Reynolds number comparison judging module is used for comparing the first Reynolds number with a preset range, judging whether the first Reynolds number is in the preset range or not, and acquiring a second valve resistance coefficient of each valve according to the Reynolds number in the preset range; the Reynolds number comparison judging module comprises a comparison judging module and a trial calculation module, wherein the comparison judging module is used for judging whether the first Reynolds number is in a preset range, and when the first Reynolds number is in the preset range, the first valve resistance coefficient is judged to be a second valve resistance coefficient; The valve opening calculating module is used for obtaining the first valve opening according to the resistance coefficient-valve opening curve and the second valve resistance coefficient.
8. The flow rate commissioning system of claim 7, wherein the flow rate commissioning system further comprises: The error calculating and judging module is used for calculating the error between the obtained actual flow value and the model flow value corresponding to the first valve opening when the first valve opening is applied to the actual ship pipeline system, and judging whether to execute the first valve opening or determine the final execution valve opening according to the magnitude of the error value.
9. The flow rate commissioning system of claim 8, wherein the flow rate commissioning system further comprises: and the resistance coefficient-valve opening curve correction module is used for correcting the resistance coefficient-valve opening curve according to the third valve resistance coefficient and the final execution valve opening, which are obtained when the final execution valve opening is executed in the actual ship pipeline system.

Description

Flow velocity debugging method and system for ship oil system Technical Field The invention relates to the technical field of flow regulation of ship pipelines, in particular to a flow velocity debugging method and system for a ship oil system. Background The ship pipeline is used as an important component of the ship device, just like an arteriovenous vessel of a human body, and provides the needed working media such as fuel, lubricating oil, water, compressed air and the like for the ship device, so that the safe operation of ship equipment is ensured. With the progress of shipbuilding technology and the trend of ship upsizing, ship pipelines and pipe network systems develop to be upsized and complicated, and the technical requirements of modern complex pipe networks are difficult to meet by the traditional pipe network debugging method only based on manual experience. In order to accelerate the ship construction progress and shorten the power system debugging period, the pipe network system layout scheme can be simulated by a computer simulation technology, so that the ship system debugging process is optimized. The ship oil flow system is used for supplying enough fuel oil and lubricating oil which meet the quality requirement for ship power plant equipment, and a large amount of time is consumed for the series washing process of the pipeline system in the later period of ship construction in order to ensure the cleanliness of the fuel oil and the lubricating oil which are conveyed to the equipment, and in view of the fact that the viscosity is still large after the oil working medium is heated, the opening degree of a valve is continuously regulated to change the oil flow speed of each pipeline, so that the pipeline cleaning is completed. When the pipe network system is complex, the above-mentioned oil flow system series-washing time can seriously drag the shipbuilding progress or even influence the ship-crossing node. Currently, the disclosed patent mainly focuses on the monitoring and feedback regulation process of an electric regulating valve, for example, MX2016002889 of mexico patent provides a method for managing and controlling the demand of a fluid pipe network, a plurality of valve groups of the fluid network are controlled by a computer, parameters are calculated in real time by using a database, the flow rate and the flow rate of each valve are monitored and regulated, and the demand of the pipe network flow is ensured. The above patent is mainly applied to the actual debugging process in the field, and is matched with an electric valve to realize negative feedback regulation. The valve of the pipe network system in the ship industry is usually in a manual regulation mode, and negative feedback regulation of the valve aiming at a target variable can consume a great deal of time. Disclosure of Invention In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a flow rate adjustment method and system for a ship oil system, so as to improve the efficiency of the serial washing of the ship oil system. To achieve the above and other related objects, the present invention provides a flow rate debugging method for a ship oil system, comprising: s1, constructing a pipe network model of a ship oil system, wherein the pipe network model comprises various components, and the components comprise pipelines and valves; S2, setting data parameters of various components in the pipeline model, and setting the resistance coefficient of the valve to be minimum, wherein the resistance coefficient corresponding to the valve is a first valve resistance coefficient; s3, calculating the Reynolds number Re of the fluid of each section of pipeline according to the set value of the data parameter and the first valve resistance coefficient, and recording the Reynolds number Re as a first Reynolds number; S4, comparing the first Reynolds number with a preset range, judging whether the first Reynolds number is in the preset range, and acquiring a second valve resistance coefficient of each valve according to the Reynolds number in the preset range; And S5, calculating the opening of the first valve according to the resistance coefficient-valve opening curve and the resistance coefficient of the second valve. Optionally, the step of determining whether the first reynolds number is within the preset range includes: when the first Reynolds number is in a preset range, the first valve resistance coefficient is the second valve resistance coefficient; When the first Reynolds number is not in the preset range, the Reynolds number of each pipeline is set in the preset range, the Reynolds number set in the preset range is defined as a second Reynolds number, and the second valve resistance coefficient of each valve is calculated according to the second Reynolds number. Optionally, the step of calculating the second valve drag coefficient for each valve based on the second reynol