CN112918496B - Train air consumption calculation method and system - Google Patents
Train air consumption calculation method and system Download PDFInfo
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- 238000004364 calculation method Methods 0.000 title claims abstract description 59
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- 230000001172 regenerating effect Effects 0.000 claims description 20
- 238000007664 blowing Methods 0.000 claims description 8
- 238000004378 air conditioning Methods 0.000 claims description 7
- 239000002699 waste material Substances 0.000 claims description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
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- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C17/00—Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
- B60T17/228—Devices for monitoring or checking brake systems; Signal devices for railway vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/0072—On-board train data handling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/0081—On-board diagnosis or maintenance
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Abstract
The invention relates to a train air consumption calculation method and a system, the method obtains the total air consumption of a train by respectively calculating the conventional braking air consumption, the emergency braking air consumption and the air consumption of an air spring and adding the optional air consumption of the train according to the requirement, thereby improving the calculation efficiency and the calculation precision; by analyzing the air consumption rate and visually displaying, a user can conveniently adjust each part of the train in time, and the safe operation of the train is ensured; the method can be used for calculating the static air supply time of the train and the dynamic air supply time of the train, can be used for the design calculation of related products, and can also be suitable for the analysis of the actual running condition of the train.
Description
Technical Field
The invention relates to the technical field of train operation control, in particular to a train air consumption calculation method and system.
Background
The wind source is an indispensable part in normal operation of the train, and a plurality of components in the high-speed train need to use the wind source. The braking system and the air spring of the train occupy a large part of air consumption, and in addition, the work of other parts of the train also needs to consume a certain air source to carry out normal work.
The braking system plays an important role in the safe operation of the train. In the conventional high-speed train braking, regenerative braking is firstly involved, and air braking is then involved after the train reaches a certain speed, so that the conventional braking is called, and the consumed wind is relatively small. However, when an emergency situation occurs and the regenerative braking fails, the high-speed train needs to complete the whole braking process of the train by means of air braking, the situation is called emergency braking, and the emergency braking of the train needs to consume a large amount of wind. Whether the wind source is sufficient determines whether the train can be operated safely.
Generally, the operating environment of a high-speed train is complex, and the rigidity of the air spring needs to be adjusted continuously, so that a large amount of wind is consumed in a period of time. Because the air spring can greatly improve the comfort level, the transverse movement performance, the curve passing capacity and other performances of the high-speed train, the sufficiency of the air source is ensured to be very important.
In addition, many parts (siren, car door, toilet …) on the train also need the support of the wind source, so it is important to ensure the sufficiency of the wind source of the high-speed train.
The prior art has certain data and can calculate the air consumption of the train, but is limited by the analysis capability of train crews, only can roughly judge the air consumption of the high-speed train, and the accuracy is not high.
Therefore, a method and a system for accurately calculating the air consumption of the train are needed to further improve the operation safety of the train.
Disclosure of Invention
The invention aims to provide a train air consumption calculation method and a train air consumption calculation system, which can accurately calculate the train air consumption and improve the safety of train operation.
In order to achieve the purpose, the invention provides the following scheme:
a train air consumption calculation method comprises the following steps:
calculating the air consumption of the conventional braking of the train to obtain the air consumption of the conventional braking; the conventional braking of the train refers to a braking process that regenerative braking is started firstly during the running of the train, and the regenerative braking is carried out by relying on air after a certain speed is reached;
calculating the air consumption of the emergency braking of the train to obtain the air consumption of the emergency braking; the train emergency braking means that the regenerative braking fails during the running of the train, and the whole braking process of the train is completed only by air braking;
calculating the air consumption of the air spring of the train to obtain the air consumption of the air spring;
and obtaining the total air consumption of the train according to the conventional braking air consumption, the emergency braking air consumption and the air spring air consumption.
A train air consumption calculation system comprising:
the conventional braking air consumption calculation module is used for calculating the air consumption of the conventional braking of the train to obtain the conventional braking air consumption; the conventional braking of the train refers to a braking process that regenerative braking is started firstly during the running of the train, and the regenerative braking is carried out by relying on air after a certain speed is reached;
the emergency braking air consumption calculation module is used for calculating the air consumption of the emergency braking of the train to obtain the air consumption of the emergency braking; the train emergency braking means that the regenerative braking fails during the running of the train, and the whole braking process of the train is completed only by air braking;
the air spring air consumption calculation module is used for calculating the air consumption of the train air spring to obtain the air spring air consumption;
and the total air consumption calculation module is used for obtaining the total air consumption of the train according to the conventional braking air consumption, the emergency braking air consumption and the air spring air consumption.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
(1) the train air consumption calculation method provided by the invention can calculate the air consumption of each part of the train and also can calculate the total air consumption of the train operation section, a user can quickly and accurately obtain a corresponding result, meanwhile, the user can add or delete related parts of the train according to the requirement and also can define the train air consumption by user, so that the calculation process is more flexible.
(2) The air consumption calculation method can analyze the calculation result to a certain extent, and can make a user more clearly and intuitively know the air consumption relation of each part of the train by drawing a corresponding chart to perform visual processing on data, so that each part can be adjusted according to requirements in the running of the train, and the running safety of the train is ensured.
(3) The invention also introduces two analysis methods of the train static air supply time calculation (static analysis) and the train dynamic air supply time calculation (dynamic analysis), and is suitable for different types of user requirements. The static analysis is more suitable for the design calculation of related products, and the dynamic analysis is more suitable for the analysis of the actual running condition of the train.
(4) The parameters adopted by calculation and the obtained calculation result can be stored in the database, and the user can store the input parameters at any time and quickly call the previous parameters and results, so that the method is more convenient and quicker.
(5) According to the method, the calculation result can be automatically generated into the calculation analysis report according to the requirement, so that the working time is saved, and the user can conveniently adjust the train.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a flowchart of a train air consumption calculating method provided in embodiment 1 of the present invention;
fig. 2 is a structural diagram of a train air consumption calculation system provided in embodiment 2 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The invention aims to provide a train air consumption calculation method and a train air consumption calculation system, which can accurately calculate the train air consumption and improve the safety of train operation.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example 1: referring to fig. 1, the invention provides a train air consumption calculation method, which includes:
step S1: calculating the air consumption of the conventional braking of the train to obtain the conventional braking air consumption; the conventional braking of the train refers to a braking process that regenerative braking is started firstly during the running of the train, and the regenerative braking is started to reach a certain speed and then is braked by air, and the braking process is represented as follows:
wherein Q is nm The air consumption rate (unit is L.bar/min) for the conventional braking of the train; p nbc The average pressure (in bar) in a brake cylinder at each regular braking of the train is used; p 0 Atmospheric pressure (in bar); s. the bc Is the effective area (unit is mm) of the brake cylinder piston 2 )；d bc Is the working stroke (in mm) of the brake cylinder piston; v bc0 Is the volume of the brake cylinder (in units of L); l is the total length (in m) of the train brake pipeline; d is the diameter (in mm) of the brake pipe; a is the wall thickness (in mm) of the brake pipe; k r An additional coefficient of action (typically 0.15) is applied to the brake cylinder; k is r-add An additional coefficient of action (typically 0.1) is applied to the brake pipe; t is t rb The train braking time is one time of routine braking;
step S2: calculating the air consumption of the emergency braking of the train to obtain the air consumption of the emergency braking; the emergency braking of the train means that the regenerative braking fails during the running of the train, and the whole braking process of the train is completed only by air braking, which is expressed as follows:
wherein Q is em The air consumption rate for emergency braking (unit is L.bar/min); n is a radical of ve Number of trains to be marshalled for an entire train; n is a radical of bc The number of brake cylinders of each train; v bc Is the volume (unit is L) of each set of brake cylinders; v bcg Is the clearance volume (unit is L) of each set of brake cylinders; p bc Is the emergency brake pressure (in KPa); v bct Is the brake pipe volume (in units of L) of each train; v t Is the total volume (unit is L) of the external train pipeline; p tbr The pressure of the train external pipeline when the pressure is relieved (the unit is KPa); p tbb The pressure of the train outer pipeline during braking (the unit is KPa); n is a radical of bct The emergency braking times applied to the train running section; t is t op The running time between stations is set;
step S3: calculating the air consumption of the air spring of the train to obtain the air consumption of the air spring; the air spring air consumption is expressed as:
wherein Q is am The air consumption of the air spring (unit is L.bar/min); n is a radical of ac The number of air springs of each train; p air-max The pressure intensity (in bar) in the air spring is the maximum load of the train; p air-min The pressure intensity (in bar) in the air spring when the train is unloaded; p 0 Atmospheric pressure (in bar); s ac Is the effective area (unit is mm) of the air spring 2 ) (ii) a h is the change height (unit is mm) of the air spring when the train is at the maximum load; v ac The volume (in L) for each air spring and additional reservoir; nhv is the number of height valves per train; q hv The dynamic air consumption (unit is L.bar/min) of each altitude valve; n is a radical of hydrogen st The number of train stops; t is t st The train stop time (unit is min); k a Air usage rate (usually 0.05) due to load variation;
step S4: and obtaining the total air consumption of the train according to the conventional braking air consumption, the emergency braking air consumption and the air spring air consumption, wherein the total air consumption of the train is expressed as follows:
Q all ＝Q nm +Q em +Q am
wherein Q is all The total air consumption of the train is obtained.
Because the braking of the train and the air spring occupy most of the air consumption of the train, and the braking of the train and the work of the air spring are involved in each running working condition of the train, the braking air consumption of the train and the air consumption of the air spring must be considered when the total air consumption of the train is calculated. In addition, many parts on the train also need the support of the air source, so when calculating the total air consumption of the train, according to a plurality of factors such as train operation lines, train models and the like, a user can consider the air consumption of other parts of the train according to actual conditions and can also customize the air consumption.
For this reason, when the total air consumption of the train is calculated, on the basis of the conventional braking air consumption, the emergency braking air consumption and the air spring air consumption, the optional air consumption of the train can be added, wherein the optional air consumption of the train comprises one or more of the air consumption of other parts, the pipeline leakage air consumption and the user-defined air consumption, and the air consumption of other parts of the train comprises one or more of the air consumption of a siren, the air consumption of a car door, the air consumption of a pantograph, the air consumption of a toilet, the air consumption of sanding, the air consumption of a tread sweeper, the air consumption of a waste exhaust unit, the air consumption of air conditioning equipment and the air consumption of a windshield wiper, wherein:
the wind consumption of the wind whistle component is expressed as:
Q aw ＝N aw q aw
wherein Q is aw The air consumption of the air whistle part of the whole train (the unit is L.bar/min); n is a radical of aw The number of horns of each train; q. q of aw The flow rate (in L-bar/min) required for whistling.
The door part air consumption is expressed as:
Q vd ＝(N vd V vd (P dmo +P 0 )N dmo )/((t op +t st )*100)
wherein Q is vd The air consumption rate (unit is L.bar/min) of the door part of the whole train is increased; n is a radical of vd The number of doors of each train; v vd For each actuator volume (in units of L); p dmo Pressure required for door motion completion (in KPa); p is 0 Atmospheric pressure (in KPa); n is a radical of dmo The number of door actions; t is t op Is the running time between stations (unit is min); t is t st Is the train stop time (in min).
The pantograph part air consumption is expressed as:
Q pa ＝(N pa V pa (P pmo +P 0 )N pmo )/((t op +t st )*100)
wherein Q is pa For the air consumption of pantograph parts of the whole trainThe position is L.bar/min); n is a radical of pa The number of the pantograph of each train; v pa For each actuator volume (in units of L); p pmo Pressure required for pantograph action completion (in KPa); p 0 Atmospheric pressure (in KPa); n is a radical of pmo The times (times) of pantograph actions; t is t op Is the running time between stations (unit is min); t is t st Is the train stop time (in min).
The air consumption of the toilet parts is expressed as:
Q to ＝(N to V to (P tmo +P 0 )N tmo )/((t op +t st )*100)
wherein Q to The air consumption (unit is L.bar/min) of the toilet part of the whole train; n is a radical of to Number of toilets per train; v to For each actuator volume (in units of L); p is tmo The pressure required for the toilet flushing action to be completed (in KPa); p 0 Atmospheric pressure (in KPa); n is a radical of tmo The number of flushing actions of the toilet; t is t op Is the running time between stations (unit is min); t is t st Is the train stop time (in min).
The air consumption of the sanding part is expressed as:
Q sand ＝N sand q sand
wherein Q is sand The air consumption rate (unit is L.bar/min) of a sanding part of the whole train is increased; n is a radical of sand The number of sand scattering devices of each train; q. q.s sand The flow rate (in L.bar/min) required for sanding.
Tread sweeper component air consumption was expressed as:
Q cl ＝(N cl V cl (P cmo +P 0 )N cmo )/((t op +t st )*100)
wherein Q cl The air consumption (unit is L.bar/min) of the tread sweeper component of the whole train; n is a radical of hydrogen cl The number of tread cleaners per train; v cl For each actuator volume (in units of L); p cmo Pressure required for completing action of tread cleanerBit KPa); p 0 Atmospheric pressure (in KPa); n is a radical of hydrogen cmo The times of actions of the tread sweeper are counted; t is t op Is the running time between stations (unit is min); t is t st Is the train stop time (in min).
The air consumption of the waste discharge unit and the air conditioning equipment components is expressed as follows:
Q air_c ＝(N air_c V air_c (P amo +P 0 )N amo )/((t op +t st )*100)
wherein Q is air_c The air consumption (unit is L.bar/min) of the waste discharge unit and the air conditioning equipment component of the whole train; n is a radical of air_c The number of the waste discharge units and the air conditioning equipment of each train is (number); v air—c For each actuator volume (in units of L); p is amo The pressure (unit is KPa) required for the actions of the waste discharge unit and the air conditioning equipment; p 0 Atmospheric pressure (in KPa); n is a radical of amo The operation times (times) of the waste discharge unit and the air conditioning equipment are counted; t is t op Is the running time between stations (unit is min); t is t st Is the train stop time (in min).
The windshield wiper component air consumption is expressed as:
Q ws ＝N ws q ws
wherein Q is ws The air consumption (unit is L.bar/min) of the wiper component of the whole train; n is a radical of ws The number of wipers per train; q. q.s ws The flow rate required for the wiper (in L.bar/min).
The selectable air consumption of the train is represented as:
Q selection ＝∑(Q aw +Q vd +Q pa +Q to +Q cl +Q air_c +Q ws +Q leak +Q self-1 +Q self-2 +Q self-3 )
wherein Q is selection The air consumption (unit is L.bar/min) can be selected for the train; q leak The air leakage rate of the pipeline (unit is L.bar/min); q self-1 Defining air consumption 1 (unit is L.bar/min) for a user; q self-2 Customizing consumption for userAir volume 2 (unit is L.bar/min); q self-3 The air consumption 3 (unit is L.bar/min) is defined for the user.
Therefore, the total air consumption Q of the train all It can also be expressed as:
Q all ＝Q em +Q nm +Q am +Q selection 。
after the total air consumption of the train is obtained, calculating the air consumption ratio, and visually displaying the air consumption ratio in a pie chart form; the calculation of the air consumption ratio specifically comprises the following steps:
calculating the proportion of the conventional braking air consumption according to the conventional braking air consumption and the total train air consumption, wherein the specific formula is as follows:
calculating the proportion of the emergency braking air consumption according to the emergency braking air consumption and the total train air consumption, wherein the specific formula is as follows:
according to the air consumption of the air spring and the total air consumption of the train, the air consumption ratio of the air spring is calculated, and the specific formula is as follows:
according to the optional train air consumption and the total train air consumption, calculating the optional train air consumption ratio, wherein the specific formula is as follows:
After the total air consumption of the train is obtained, calculating the air consumption rate, and visually displaying the conventional braking air consumption, the emergency braking air consumption, the air consumption of the air spring, the optional air consumption of the train and the air consumption rate in a histogram form;
the calculation of the air consumption rate specifically comprises the following steps:
calculating the conventional braking air consumption rate according to the total air consumption of the train and the conventional braking time, wherein the specific formula is as follows:
wherein v is 1 For conventional braking wind consumption rate, t con1 The conventional braking time is adopted;
calculating the emergency braking air consumption rate according to the total air consumption and the emergency braking time of the train, wherein the specific formula is as follows:
wherein v is 2 Wind rate for emergency braking, t con2 Is the time of emergency braking;
according to the total air consumption of the train and the air suspension time, calculating the air consumption rate of the air spring, wherein the specific formula is as follows:
wherein v is 3 Is the air spring air consumption rate, t con3 Air suspension time;
calculating the optional air consumption rate of the train according to the total air consumption of the train and the optional air consumption time of the train, wherein the specific formula is as follows:
The air consumption numerical values of all parts, the air consumption proportion of all parts and the air consumption rate of all parts are calculated and analyzed, and are visually displayed, so that each part of the train can be conveniently adjusted in time, and the normal operation of the train is ensured.
When the air consumption of the train is analyzed, the size of an air source which can be provided by the train, namely the total air storage capacity of the train, is also considered, and the specific calculation formula is as follows:
V total ＝V tac +V bac +V toac +V aac +V sac +V ttac +V asac +V sac1 +V sac2
wherein, V total The total air storage capacity (unit is L.bar) of the train; v tac The volume of a total air cylinder of the train (the unit is L.bar); v bac The volume of a train brake air cylinder (the unit is L.bar); v toac The volume of the air cylinder of the train toilet (the unit is L.bar); v aac The volume of a train air whistle air cylinder (the unit is L.bar); v sac The volume of the air cylinder of the pantograph of the train (the unit is L.bar); v ttac The volume of a total air pipe of the train (the unit is L.bar); v asac The volume of an air cylinder of the air spring (the unit is L.bar); v sac1 1 air cylinder volume (unit is L.bar) is defined for a user; v sac2 And defining 2 air cylinder volumes (in L.bar) for users.
It should be noted that, when the total air storage volume of the train is calculated, the braking and the air spring of the train are optional conditions, and other components and user-defined air springs can be added or deleted according to actual needs.
According to the conventional braking air consumption, the air consumption of the air spring, the optional air consumption of the train and the total air storage capacity, the static air supply time of the train is calculated, namely:
t static ＝V total /(Q nm +Q am +Q selection )
wherein, t static The static air supply time of the train is set; v total The total air storage volume is; q nm The air consumption rate is the conventional braking air consumption rate of the train; q am Air consumption of the air spring is achieved; q selection The air consumption can be selected for the train;
or according to the emergency braking air consumption, the air spring air consumption, the train selectable air consumption and the total air storage, calculating the static air supply time of the train, namely:
t static ＝V total /(Q em +Q am +Q selection )
wherein Q is em Air consumption for emergency braking.
According to the conventional braking air consumption, the air consumption of the air spring, the optional air consumption of the train, the air blowing capacity of the air compressor and the total air storage capacity, the dynamic air supply time of the train is calculated, namely
t dynamic ＝V total /(Q nm +Q am +Q selection -P pump )
Wherein, t dynamic Dynamic air supply time for the train; v total The total air storage capacity is obtained; q nm The air consumption rate is the conventional braking air consumption rate of the train; q am Air consumption of the air spring is achieved; q selection The air consumption can be selected for the train; p pump The wind blowing capacity of the air compressor is improved;
or according to the emergency braking air consumption, the air consumption of the air spring, the optional air consumption of the train, the air blowing capacity of the air compressor and the total air storage capacity, calculating the dynamic air supply time of the train, namely:
t dynamic ＝V total /(Q em +Q am +Q selection -P pump )
wherein Q is em Air consumption for emergency braking.
And the related parameters and the calculation results in the calculation process of the air consumption of each part of the train, the total air consumption of the train, the total air storage quantity, the static air supply time of the train and the dynamic air supply time of the train are stored in a database so as to be convenient for later calling, and the related parameters among the air consumption of each part of the train, the total air consumption of the train, the total air storage quantity, the static air supply time of the train and the dynamic air supply time of the train can be shared, so that the times of repeated input of a user are reduced.
Finally, the above calculation results and visualization results can both generate an analysis report of the air consumption rate in the train operation interval, and the user also needs to simply input the related parameters of "project name", "project number", "project responsible person", "project group member", "consignment unit", "report year", "report month", "report date", "fax number", "report keyword", "telephone number", "report type", "project completion unit and communication address", "abstract content", "foreword" and "summary" in the report.
The invention can quickly and accurately calculate the air consumption of each part of the train and the total air consumption of the train running section through the formula, and simultaneously further analyzes the calculation result to obtain the air consumption ratio and the air consumption rate, and generates an analysis report according to the static air supply time of the train and the dynamic air supply time of the train, thereby being beneficial to the user to adjust the train running in time, saving the working time and improving the working efficiency.
Example 2:
referring to fig. 2, the present invention also provides a train air consumption calculation system, including:
the conventional braking air consumption calculation module M1 is used for calculating the air consumption of the conventional braking of the train to obtain the conventional braking air consumption; the conventional braking of the train refers to a braking process that regenerative braking is started firstly during the running of the train, and the regenerative braking is carried out by relying on air after a certain speed is reached;
the emergency braking air consumption calculation module M2 is used for calculating the air consumption of the emergency braking of the train to obtain the emergency braking air consumption; the train emergency braking means that the regenerative braking fails during the running of the train, and the whole braking process of the train is completed only by air braking;
the air spring air consumption rate calculating module M3 is used for calculating the air consumption rate of the train air spring to obtain the air consumption rate of the air spring;
and the total air consumption calculation module M4 is used for obtaining the total air consumption of the train according to the conventional braking air consumption, the emergency braking air consumption and the air spring air consumption.
The system is developed by adopting python language, a Qt frame is used for providing a user operation interface, and a user can input related parameters according to actual conditions to complete the calculation of the air consumption of the train. Meanwhile, the system also provides a secondary development environment for the user, and the user can add special parameters and algorithms according to the self condition.
The emphasis of each embodiment in the present specification is on the difference from the other embodiments, and the same and similar parts among the various embodiments may be referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (6)
1. A train air consumption calculation method is characterized by comprising the following steps:
calculating the air consumption of the conventional braking of the train to obtain the conventional braking air consumption; the conventional braking of the train refers to a braking process that regenerative braking is started firstly during the running of the train, and the regenerative braking is carried out by relying on air after a certain speed is reached;
calculating the air consumption of the emergency braking of the train to obtain the air consumption of the emergency braking; the train emergency braking means that the regenerative braking fails during the running of the train, and the whole braking process of the train is completed only by air braking;
calculating the air consumption of the air spring of the train to obtain the air consumption of the air spring;
obtaining the total air consumption of the train according to the conventional braking air consumption, the emergency braking air consumption and the air spring air consumption;
after the total air consumption of the train is obtained, calculating an air consumption ratio, and visually displaying the air consumption ratio in a pie graph form; the calculation of the air consumption ratio specifically comprises the following steps:
calculating the conventional braking air consumption ratio according to the conventional braking air consumption and the total train air consumption;
calculating the emergency braking air consumption ratio according to the emergency braking air consumption and the total train air consumption;
calculating the air spring air consumption ratio according to the air spring air consumption and the total train air consumption;
calculating the ratio of the optional air consumption of the train according to the optional air consumption of the train and the total air consumption of the train;
after the total air consumption of the train is obtained, calculating the air consumption rate, and visually displaying the conventional braking air consumption, the emergency braking air consumption, the air spring air consumption, the train selectable air consumption and the air consumption rate in a bar graph form;
the calculation of the air consumption rate specifically comprises:
calculating the conventional braking air consumption rate according to the total air consumption of the train and the conventional braking time;
calculating the emergency braking air consumption rate according to the total air consumption of the train and the emergency braking time;
calculating the air consumption rate of an air spring according to the total air consumption of the train and the air suspension time;
calculating the optional train air consumption rate according to the total train air consumption and the optional train air consumption time;
after obtaining the total air consumption of the train, the method further comprises the following steps:
calculating the total wind energy storage capacity of the train to obtain the total wind storage capacity;
calculating the static air supply time of the train according to the conventional braking air consumption, the air spring air consumption, the optional train air consumption and the total air storage volume;
or according to the emergency braking air consumption amount, the air spring air consumption amount, the train selectable air consumption amount and the total air storage amount, calculating the static air supply time of the train;
after the total air consumption of the train is obtained, the method further comprises the following steps:
calculating the total wind energy storage capacity of the train to obtain the total wind storage capacity;
calculating the dynamic air supply time of the train according to the conventional braking air consumption, the air consumption of the air spring, the optional air consumption of the train, the air blowing capacity of an air compressor and the total air storage capacity;
or calculating the dynamic air supply time of the train according to the emergency braking air consumption, the air spring air consumption, the optional train air consumption, the air compressor blowing capacity and the total air storage capacity;
relevant parameters and calculation results in the calculation process of the air consumption of each part of the train, the total air consumption of the train, the total air storage quantity, the static air supply time of the train and the dynamic air supply time of the train are stored in a database so as to be convenient to call in the future, and the relevant parameters among the air consumption of each part of the train, the total air consumption of the train, the total air storage quantity, the static air supply time of the train and the dynamic air supply time of the train can be shared;
the method is developed by adopting python language, a Qt frame is used for providing a user operation interface, a user can input related parameters according to actual conditions to complete the calculation of the air consumption of the train, meanwhile, a secondary development environment is provided for the user, and the user can add special parameters and algorithms according to self conditions.
2. The train air consumption calculation method of claim 1, wherein the total train air consumption further comprises a train selectable air consumption, the train selectable air consumption comprises one or more of other component air consumption, pipeline leakage air consumption and user-defined air consumption, and the other train component air consumption comprises one or more of air consumption of a siren, air consumption of a door, air consumption of a pantograph, air consumption of a toilet, air consumption of a sanding, air consumption of a tread sweeper, air consumption of a waste dump unit, air consumption of air conditioning equipment, and air consumption of a windshield wiper.
3. The method for calculating the train air consumption rate according to claim 1, wherein the step of obtaining the total train air consumption rate according to the conventional braking air consumption rate, the emergency braking air consumption rate and the air spring air consumption rate specifically comprises the following steps:
the conventional braking air consumption is expressed as:
wherein Q is nm Consuming air for the conventional braking of the train; n is a radical of hydrogen ve Number of marshalling trains for an entire train; n is a radical of bc The number of brake cylinders of each train; p nbc The average pressure intensity in a brake cylinder is obtained when the train is normally braked each time; p 0 Is at atmospheric pressure; s bc Is the effective area of the brake cylinder piston; d is a radical of bc Is the working stroke of the brake cylinder piston; v bc0 Is the volume of the brake cylinder; l is the total length of the train brake pipeline; d is the diameter of the brake pipeline; a is the wall thickness of the brake pipe; k is r Operating additional coefficients of action for the brake cylinder; k r-add An additional coefficient of action for brake pipe work; t is t rb One conventional braking time for the train;
the emergency braking air consumption is expressed as follows:
wherein Q is em Consuming air for the emergency braking; n is a radical of ve Number of marshalling trains for an entire train; n is a radical of hydrogen bc The number of brake cylinders of each train; v bc The volume of each set of brake cylinder; v bcg The clearance volume of each set of brake cylinder; p bc Is the emergency brake pressure; v bct The brake pipe volume of each train; v t The total volume of the train external pipeline; p tbr The pressure of the train external pipeline is relieved; p tbb The pressure of the train external pipeline during braking; n is a radical of bct The emergency braking times applied to the train running section; t is t op The running time between stations is used;
the air consumption of the air spring is expressed as:
wherein Q is am Consuming air for the air spring; n is a radical of ac Number of air springs per train, P air-max The pressure intensity in the air spring is the maximum load of the train; p is air-min The pressure intensity in the air spring is the pressure intensity when the train is in no-load; p 0 Is at atmospheric pressure; s ac Is the effective area of the air spring; h is the change height of the air spring when the train is at the maximum load; v ac The volume of each air spring and the additional air cylinder; n is a radical of hv The number of altitude valves for each train; q hv Dynamic air consumption for each altitude valve; n is a radical of st The number of train stops; t is t st The train stop time; k a The air utilization rate caused by load change;
the total air consumption of the train is represented as: q all ＝Q nm +Q em +Q am
Wherein Q all And the total air consumption of the train is obtained.
4. The method for calculating the air consumption of the train according to claim 1, wherein the specific method for calculating the static air supply time of the train comprises the following steps:
t static ＝V total /(Q nm +Q am +Q selection )
or t static ＝V total /(Q em +Q am +Q selection )
Wherein, t static Providing static air supply time for the train; v total The total air storage volume is; q nm Consuming air for the conventional braking of the train; q am Consuming air for the air spring; q selection Selecting air consumption for the train; q em And consuming air volume for the emergency braking.
5. The method for calculating the air consumption of the train according to claim 1, wherein the specific method for calculating the dynamic air supply time of the train comprises the following steps:
t dynamic ＝V total /(Q em +Q am +Q selection -P pump )
or t dynamic ＝V total /(Q nm +Q am +Q selection -P pump )
Wherein, t dynamic Dynamic air supply time for the train; v total The total air storage volume is; q nm Consuming air for the conventional braking of the train; q am Consuming the air volume for the air spring; q selection Selecting air consumption for the train; p pump The wind blowing capacity of the air compressor is improved; q em And consuming air volume for the emergency braking.
6. A train air consumption calculation system, characterized by comprising:
the conventional braking air consumption calculation module is used for calculating the air consumption of the conventional braking of the train to obtain the conventional braking air consumption; the conventional braking of the train refers to a braking process that regenerative braking is started firstly during the running of the train, and the regenerative braking is carried out by relying on air after a certain speed is reached;
the emergency braking air consumption calculation module is used for calculating the air consumption of the emergency braking of the train to obtain the air consumption of the emergency braking; the train emergency braking means that the regenerative braking fails during the running of the train, and the whole braking process of the train is completed only by air braking;
the air spring air consumption calculation module is used for calculating the air consumption of the train air spring to obtain the air spring air consumption;
and the total air consumption calculation module is used for obtaining the total air consumption of the train according to the conventional braking air consumption, the emergency braking air consumption and the air spring air consumption.
After the total air consumption of the train is obtained, calculating an air consumption ratio, and visually displaying the air consumption ratio in a pie chart form; the calculation of the air consumption ratio specifically comprises the following steps:
calculating the air consumption ratio of the conventional brake according to the air consumption of the conventional brake and the total air consumption of the train;
calculating the emergency braking air consumption ratio according to the emergency braking air consumption and the total train air consumption;
calculating the air spring air consumption ratio according to the air spring air consumption and the total train air consumption;
calculating the ratio of the optional air consumption of the train according to the optional air consumption of the train and the total air consumption of the train;
after the total air consumption of the train is obtained, calculating the air consumption rate, and visually displaying the conventional braking air consumption, the emergency braking air consumption, the air spring air consumption, the train selectable air consumption and the air consumption rate in a bar graph form;
the calculation of the air consumption rate specifically comprises:
calculating the conventional braking air consumption rate according to the total air consumption of the train and the conventional braking time;
calculating the emergency braking air consumption rate according to the total air consumption of the train and the emergency braking time;
calculating the air consumption rate of an air spring according to the total air consumption of the train and the air suspension time;
calculating the optional train air consumption rate according to the total train air consumption and the optional train air consumption time;
after obtaining the total air consumption of the train, the method further comprises the following steps:
calculating the total wind storage capacity of the train to obtain the total wind storage capacity;
calculating the static air supply time of the train according to the conventional braking air consumption, the air consumption of the air spring, the optional air consumption of the train and the total air storage capacity;
or calculating the static air supply time of the train according to the emergency braking air consumption amount, the air spring air consumption amount, the optional train air consumption amount and the total air storage amount;
after the total air consumption of the train is obtained, the method further comprises the following steps:
calculating the total wind storage capacity of the train to obtain the total wind storage capacity;
calculating the dynamic air supply time of the train according to the conventional braking air consumption, the air consumption of the air spring, the optional air consumption of the train, the air blowing capacity of an air compressor and the total air storage capacity;
or calculating the dynamic air supply time of the train according to the emergency braking air consumption, the air spring air consumption, the optional train air consumption, the air compressor blowing capacity and the total air storage capacity;
relevant parameters and calculation results in the calculation process of the air consumption of each part of the train, the total air consumption of the train, the total air storage quantity, the static air supply time of the train and the dynamic air supply time of the train are stored in a database so as to be convenient for later calling, and relevant parameters among the air consumption of each part of the train, the total air consumption of the train, the total air storage quantity, the static air supply time of the train and the dynamic air supply time of the train can be shared;
the system is developed by adopting python language, a user operation interface is provided by using a Qt frame, a user can input related parameters according to actual conditions to complete the calculation of the air consumption of the train, meanwhile, the system also provides a secondary development environment for the user, and the user can add special parameters and algorithms according to the self conditions.
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