CN112590854A - Subway vehicle air brake supplementing method and device - Google Patents

Subway vehicle air brake supplementing method and device Download PDF

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Publication number
CN112590854A
CN112590854A CN202110007228.3A CN202110007228A CN112590854A CN 112590854 A CN112590854 A CN 112590854A CN 202110007228 A CN202110007228 A CN 202110007228A CN 112590854 A CN112590854 A CN 112590854A
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belt
train
brake
electric
deceleration
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CN112590854B (en
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王丽
段继超
何小军
任得鹏
张青
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CRRC Zhuzhou Locomotive Co Ltd
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CRRC Zhuzhou Locomotive Co Ltd
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Priority to PCT/CN2021/123216 priority patent/WO2022148079A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H11/00—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types
    • B61H11/06—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types of hydrostatic, hydrodynamic, or aerodynamic brakes
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Braking Systems And Boosters (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Regulating Braking Force (AREA)

Abstract

The invention discloses an air brake supplementing method for a metro vehicle, which comprises the following steps: s1, calculating a according to the following formulaBelt 1：aBelt 1＝aFirst stage‑aFinal (a Chinese character of 'gan')(ii) a S2, mixing aBelt 1Comparing with a preset deceleration difference zone delta a if aBelt 1A is more than or equal to delta a, the air braking force is increased by aRegulating device. Due to the adoption of the technical scheme, compared with the prior art, the invention compares aBelt 1And Δ a to identify whether the electric brake is in cliff-type decrease, i.e. when aBelt 1When the speed is more than or equal to delta a, the electric brake is judged to be reduced in a cliff-breaking mode, and the air brake force is increased in time, so that the problem that the deceleration of the train is suddenly reduced is solved. In addition, because the characteristics of the brake shoe of the braking system are closely related to environmental factors such as temperature, humidity and the like, the deceleration difference of the train can be dynamically adjusted by adopting the method of the invention, and the braking output by the train can be adjusted according to the closest characteristic of the brake shoeForce.

Description

Subway vehicle air brake supplementing method and device
Technical Field
The invention relates to the field of train brake control, in particular to a method and a device for supplementing air brake of a subway vehicle.
Background
Two braking forces of electric braking and air braking exist in the parking stage of the subway vehicle in the normal operation process. Generally, the electric braking force is preferentially used when the train brakes, and the electric braking force is withdrawn when the train is below a certain speed, and air braking is applied until the train stops. In this process, the cooperation between electric braking and air braking directly affects the braking effect of the train. Although the train braking performance is tested and corrected before the train runs, the coordination between the electric brake and the air brake of the train cannot be kept consistent all the time due to the influence of uncertain factors such as environment temperature, brake shoe friction coefficient and the like, so that the situation that the electric brake is reduced in a cliff-breaking manner and the deceleration of the train is suddenly reduced often occurs.
Disclosure of Invention
In order to solve the problems that the matching between the electric brake and the air brake of the existing subway vehicle can not be kept consistent all the time in the background technology, the electric brake is reduced in a cliff-breaking mode, and the deceleration of a train is suddenly reduced, the invention provides an air brake supplementing method for the subway vehicle, and the specific technical scheme is as follows.
An air brake supplement method for a metro vehicle, comprising the steps of:
s1, calculating a according to the following formulaBelt 1：aBelt 1＝aFirst stage-aFinal (a Chinese character of 'gan')；
Wherein a isFirst stageThe deceleration value of the electric brake when the electric brake is started to exit in the previous matching process of the electric brake and the air brake, aFinal (a Chinese character of 'gan')The deceleration value of the train when the electric brake is completely withdrawn in the previous matching process of the electric brake and the air brake;
s2, mixing aBelt 1Comparing with a preset deceleration difference zone delta a if aBelt 1≥Δa，The air braking force is increased by aRegulating deviceWherein a isRegulating device＝aBelt 1+(Δa/2)。
The preset deceleration difference zone delta a is the maximum difference of the deceleration differences of the electric brake and the air brake in a plurality of electric-air matching tests. When the electric braking force exits, an electric brake fade-out signal is sent to a vehicle control network in advance, a vehicle control system sends the signal to a vehicle air braking system, and the air braking system applies the air braking force after receiving the signal. The time value for sending the electric brake fade-out signal in advance when the electric brake force is withdrawn is the response time of the air brake.
Electric-air fit test: in the low-speed stage of the train in the parking process, the electric braking force capability is reduced along with the reduction of the vehicle speed, the deceleration requirement required by the train cannot be met, the train is supplemented by air braking, and the process is called an electric-air matching test process. Because the air brake needs response time for mechanical brake, the traction system and the air brake system negotiate, an electric brake force fade-out signal is sent in advance for a period of time before the electric brake force drops, the brake system starts to supplement the air brake force after receiving the signal, when the air brake force plays a role, the electric brake force value begins to drop, and the superposition effect of the electric brake force and the air brake force ensures that the deceleration of the vehicle is stable and unchanged. The specific content of the electric-air coordination test can be referred to in the document "coordination analysis of a traction system and a brake system of a Chongqing subway train", Huang-obviously Wu, Zhan-Bin and Mao kang Xin, and the period 2016 of locomotive electric transmission ".
The above method by comparing aBelt 1And Δ a to identify whether the electric brake is in cliff-type decrease, i.e. when aBelt 1When the speed is more than or equal to delta a, the electric brake is judged to be reduced in a cliff-breaking mode, and the air brake force is increased in time, so that the problem that the deceleration of the train is suddenly reduced is solved. Further, since the characteristics of the brake shoes of the brake system are closely related to environmental factors such as temperature and humidity, the deceleration difference of the train can be dynamically adjusted by using the above method, and the braking force output by the train can be adjusted according to the closest characteristics of the brake shoes. On the other hand, the train braking performance test verification is carried out on a certain train, and different vehicles can have differences, so that the method can be used for verifying the braking performance of the trainAnd dynamically adjusting the train deceleration difference so as to adjust the braking performance which is most suitable for each train according to the characteristics of each train.
Preferably, the following steps are further included between S1 and S2:
s11, calculating a according to the following formulaBelt 2：aBelt 2＝VElectric 0 2[ 2S ] where S is the deviation of the allowed stopping distance of the train, VElectric 0The speed of the train when the electric brake is completely withdrawn; if aBelt 2＜aBelt 1Then a will beBelt 2As new aBelt 1. Therefore, the train stopping distance deviation can be associated with the train control program, and the adjustment precision can be ensured to meet the train operation requirement.
Preferably, in step S2, the air braking force is increased by aRegulating deviceIn which the train-down deceleration command is disabled and the train-up deceleration command is enabled. Therefore, the frequent adjustment of the control level of the train control system caused by the objective slow mechanical response speed of the air brake can be reduced.
Preferably, in step S2, if aBelt 1< Δ a, the train up/down deceleration commands are both active.
Based on the same inventive concept, the present invention also provides a subway vehicle air brake supplementary device, comprising:
a first calculation unit for calculating a according to the following formulaBelt 1：aBelt 1＝aFirst stage-aFinal (a Chinese character of 'gan')(ii) a Wherein a isFirst stageThe deceleration value of the electric brake when the electric brake is started to exit in the previous matching process of the electric brake and the air brake, aFinal (a Chinese character of 'gan')The deceleration value of the train when the electric brake is completely withdrawn in the previous matching process of the electric brake and the air brake;
a comparison execution unit, in communication with the first calculation unit, for comparing aBelt 1Comparing with a preset deceleration difference zone delta a if aBelt 1A is more than or equal to delta a, the air braking force is increased by aRegulating device(ii) a Wherein a isRegulating device＝aBelt 1+(Δa/2)。
The preset deceleration difference zone delta a is used for electric braking and air braking in a plurality of electric-air fit testsMaximum difference in dynamic deceleration difference. By the above structure, a can be comparedBelt 1And Δ a to identify whether the electric brake is in cliff-type decrease, i.e. when aBelt 1When the speed is more than or equal to delta a, the electric brake is judged to be reduced in a cliff-breaking mode, and the air brake force is increased in time, so that the problem that the deceleration of the train is suddenly reduced is solved. Further, since the characteristics of the brake shoes of the brake system are closely related to environmental factors such as temperature and humidity, the deceleration difference of the train can be dynamically adjusted by using the above method, and the braking force output by the train can be adjusted according to the closest characteristics of the brake shoes. On the other hand, the train braking performance test verification is carried out on a certain train, different vehicles have differences, and the train deceleration difference can be dynamically adjusted through the method, so that the braking performance which is most suitable for the train is adjusted according to the characteristics of each train.
Preferably, a second calculation unit is further included, in communication with the first calculation unit, for calculating a according to the following formulaBelt 2：aBelt 2＝VElectric 0 2[ 2S ] where S is the deviation of the allowed stopping distance of the train, VElectric 0The speed of the train when the electric brake is completely withdrawn; if aBelt 2＜aBelt 1Then a will beBelt 2As new aBelt 1. Therefore, the train stopping distance deviation can be associated with the train control program, and the adjustment precision can be ensured to meet the train operation requirement.
Preferably, the air brake system further comprises a first execution unit which is communicated with the comparison execution unit and is used for increasing the air brake force by aRegulating deviceThe train lower deceleration command is disabled and the train upper deceleration command is enabled. Therefore, the frequent adjustment of the control level of the train control system caused by the objective slow mechanical response speed of the air brake can be reduced.
Preferably, the device further comprises a second execution unit, which is communicated with the comparison execution unit and used for comparing when the comparison result of the comparison execution unit is aBelt 1< Δ a, the train up/down deceleration command is asserted.
Due to the adoption of the technical scheme, compared with the prior art, the invention compares the technical scheme with the prior artaBelt 1And Δ a to identify whether the electric brake is in cliff-type decrease, i.e. when aBelt 1When the speed is more than or equal to delta a, the electric brake is judged to be reduced in a cliff-breaking mode, and the air brake force is increased in time, so that the problem that the deceleration of the train is suddenly reduced is solved. In addition, because the characteristics of brake shoes of the braking system are closely related to environmental factors such as temperature, humidity and the like, the deceleration difference of the train can be dynamically adjusted by adopting the method of the invention, and the braking force output by the train can be adjusted according to the closest characteristics of the brake shoes. On the other hand, the train braking performance test verification is carried out on a certain train, different vehicles can have differences, and the train deceleration difference can be dynamically adjusted through the method, so that the braking performance of the train which is most suitable for the train can be adjusted according to the characteristics of each train.
Drawings
FIG. 1 is a schematic flow chart of an air brake supplementing method for a metro vehicle according to the present invention;
fig. 2 is a schematic circuit structure diagram of the air brake supplementary device for the metro vehicle.
Detailed Description
The present invention is described in further detail below with reference to the attached drawing figures.
Example 1
Referring to fig. 1, an air brake supplement method for a subway vehicle includes the steps of:
s1, calculating a according to the following formulaBelt 1：aBelt 1＝aFirst stage-aFinal (a Chinese character of 'gan')；
Wherein a isFirst stageThe deceleration value of the electric brake when the electric brake is started to exit in the previous matching process of the electric brake and the air brake, aFinal (a Chinese character of 'gan')The deceleration value of the train when the electric brake is completely withdrawn in the previous matching process of the electric brake and the air brake;
s11, calculating a according to the following formulaBelt 2：aBelt 2＝VElectric 0 22S; wherein S is the allowable deviation of the stopping distance of the train, VElectric 0The speed of the train when the electric brake is completely withdrawn; if aBelt 2＜aBelt 1Then a will beBelt 2As new aBelt 1。
S2, mixing aBelt 1Comparing with a preset deceleration difference zone delta a;
if aBelt 1A is more than or equal to delta a, the air braking force is increased by aRegulating deviceMeanwhile, the deceleration reducing command of the train is disabled, and the deceleration increasing command of the train is effective; wherein a isRegulating device＝aBelt 1+(Δa/2)；
If aBelt 1< Δ a, the train up/down deceleration command is enabled.
The preset deceleration difference zone delta a is the maximum difference of the deceleration differences of the electric brake and the air brake in a plurality of electric-air matching tests.
Example 2
Referring to fig. 2, an air brake supplementary device for a subway vehicle includes:
a first calculation unit for calculating a according to the following formulaBelt 1：aBelt 1＝aFirst stage-aFinal (a Chinese character of 'gan')(ii) a Wherein a isFirst stageThe deceleration value of the electric brake when the electric brake is started to exit in the previous matching process of the electric brake and the air brake, aFinal (a Chinese character of 'gan')The deceleration value of the train when the electric brake is completely withdrawn in the previous matching process of the electric brake and the air brake;
a second calculation unit, in communication with the first calculation unit, for calculating a according to the following formulaBelt 2：aBelt 2＝VElectric 0 2[ 2S ] where S is the deviation of the allowed stopping distance of the train, VElectric 0The speed of the train when the electric brake is completely withdrawn; if aBelt 2＜aBelt 1Then a will beBelt 2As new aBelt 1；
A comparison execution unit, in communication with the first calculation unit, for comparing aBelt 1Comparing with a preset deceleration difference zone delta a if aBelt 1A is more than or equal to delta a, the air braking force is increased by aRegulating device(ii) a Wherein a isRegulating device＝aBelt 1+(Δa/2)；
A first execution unit, in communication with the comparison execution unit, for increasing a at the air braking forceRegulating deviceIn the time period (D), the deceleration reducing command of the train is disabled, and the train is enabledRaising the deceleration command is active;
a second execution unit, in communication with the comparison execution unit, for executing a comparison when the comparison result of the comparison execution unit is aBelt 1< Δ a, the train up/down deceleration command is asserted. The preset deceleration difference zone delta a is the maximum difference of the deceleration differences of the electric brake and the air brake in a plurality of electric-air matching tests.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (8)

1. A railcar airbrake replenishment method, comprising the steps of:
s1, calculating a according to the following formulaBelt 1：aBelt 1＝aFirst stage-aFinal (a Chinese character of 'gan')；
Wherein a isFirst stageThe deceleration value of the electric brake when the electric brake is started to exit in the previous matching process of the electric brake and the air brake, aFinal (a Chinese character of 'gan')The deceleration value of the train when the electric brake is completely withdrawn in the previous matching process of the electric brake and the air brake;
s2, mixing aBelt 1Comparing with a preset deceleration difference zone delta a if aBelt 1A is more than or equal to delta a, the air braking force is increased by aRegulating device(ii) a Wherein a isRegulating device＝aBelt 1+(Δa/2)。
2. A method for supplementing air brake of subway vehicle as claimed in claim 1, wherein between S1 and S2 further comprising the steps of:
s11, calculating a according to the following formulaBelt 2：aBelt 2＝VElectric 0 2/2S, whereinS is the allowable deviation of stopping distance of the train, VElectric 0The speed of the train when the electric brake is completely withdrawn; if aBelt 2＜aBelt 1Then a will beBelt 2As new aBelt 1。
3. A subway vehicle air brake supplement method as claimed in claim 1 or 2, wherein: in step S2, the air braking force is increased by aRegulating deviceIn which the train-down deceleration command is disabled and the train-up deceleration command is enabled.
4. A subway vehicle air brake supplement method as claimed in claim 1 or 2, wherein: in step S2, if aBelt 1< Δ a, the train up/down deceleration commands are both active.
5. An air brake supplement for a railcar, comprising:
a first calculation unit for calculating a according to the following formulaBelt 1：aBelt 1＝aFirst stage-aFinal (a Chinese character of 'gan')(ii) a Wherein a isFirst stageThe deceleration value of the electric brake when the electric brake is started to exit in the previous matching process of the electric brake and the air brake, aFinal (a Chinese character of 'gan')The deceleration value of the train when the electric brake is completely withdrawn in the previous matching process of the electric brake and the air brake;
a comparison execution unit, in communication with the first calculation unit, for comparing aBelt 1Comparing with a preset deceleration difference zone delta a if aBelt 1A is more than or equal to delta a, the air braking force is increased by aRegulating device(ii) a Wherein a isRegulating device＝aBelt 1+(Δa/2)。
6. A metro vehicle air brake replenishing device according to claim 5, wherein: further comprising a second calculation unit, in communication with the first calculation unit, for calculating a according to the formulaBelt 2：aBelt 2＝VElectric 0 2[ 2S ] where S is the deviation of the allowed stopping distance of the train, VElectric 0For electric brakingThe speed of the train upon exit; if aBelt 2＜aBelt 1Then a will beBelt 2As new aBelt 1。
7. A subway vehicle air brake supplementary device according to claim 5 or 6, wherein: the air brake system also comprises a first execution unit which is communicated with the comparison execution unit and is used for increasing a when the air brake force is increasedRegulating deviceThe train lower deceleration command is disabled and the train upper deceleration command is enabled.
8. A subway vehicle air brake supplementary device according to claim 5 or 6, wherein: the device also comprises a second execution unit which is communicated with the comparison execution unit and is used for comparing when the comparison result of the comparison execution unit is aBelt 1< Δ a, the train up/down deceleration command is asserted.
CN202110007228.3A 2021-01-05 2021-01-05 Subway vehicle air brake supplementing method and device Active CN112590854B (en)

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PCT/CN2021/123216 WO2022148079A1 (en) 2021-01-05 2021-10-12 Method and apparatus for supplementing air brake of subway vehicle

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WO2022148079A1 (en) * 2021-01-05 2022-07-14 中车株洲电力机车有限公司 Method and apparatus for supplementing air brake of subway vehicle

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