CN114802167B - Traction locomotive braking system, braking detection method and vehicle - Google Patents

Traction locomotive braking system, braking detection method and vehicle Download PDF

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Publication number
CN114802167B
CN114802167B CN202210542503.6A CN202210542503A CN114802167B CN 114802167 B CN114802167 B CN 114802167B CN 202210542503 A CN202210542503 A CN 202210542503A CN 114802167 B CN114802167 B CN 114802167B
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connecting rod
braking
brake
left connecting
force value
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CN114802167A (en
Inventor
徐光华
刘德斌
陈和平
叶理
汪兴浩
庄泽伟
武贤掌
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Yueshuidian Track Traffic Construction Co ltd
Guangdong No 2 Hydropower Engineering Co Ltd
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Yueshuidian Track Traffic Construction Co ltd
Guangdong No 2 Hydropower Engineering Co Ltd
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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
    • 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
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

The invention discloses a traction locomotive braking system, a braking detection method and a vehicle, and relates to the technical field of vehicle control. The braking device drives the braking mechanism to brake the wheels through the braking air cylinder, and the pulling pressure sensor is arranged on the piston rod of the braking air cylinder to detect the pulling force value of the braking air cylinder on the braking mechanism. After the processing device obtains the pulling force value of the pulling pressure sensor, the braking force value representing the force of the wheel subjected to the braking mechanism is determined according to the pulling force value, and then the braking force value is sent to the display device for display, so that the braking working condition can be provided for a driver during braking, and the driving safety is improved.

Description

Traction locomotive braking system, braking detection method and vehicle
Technical Field
The invention relates to the technical field of vehicle control, in particular to a traction locomotive braking system, a braking detection method and a vehicle.
Background
In the current traffic tunnel construction, most of tunnel construction adopts a shield tunneling machine for tunneling, and then duct piece assembly is carried out to complete the tunnel. During construction, a backup set of equipment for traction of an electric locomotive or an internal combustion locomotive is indispensable and used for completing conveying of various materials such as lining segments, mortar, dregs, grease foam and the like in a tunnel. At present, a manual brake system is adopted for a traction locomotive, the working condition of the brake system is judged by virtue of the proficiency and experience of a locomotive driver, and potential safety hazards are high.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a traction locomotive braking system, a braking detection method and a vehicle, which can detect and display the braking force value received by the wheels of the traction locomotive, and improve driving safety.
In one aspect, an embodiment of the invention provides a traction locomotive braking system, which comprises a processing device, a braking device and a display device, wherein the processing device is connected with the display device;
the brake device comprises a brake mechanism and brake cylinders, the brake mechanism is arranged on two sides of a wheel, the brake cylinders are connected with the brake mechanism, and the brake cylinders are used for locking the wheel by controlling the brake mechanism to move;
a pulling pressure sensor is arranged on a piston rod of the brake cylinder and is electrically connected with the processing device, and the pulling pressure sensor is used for detecting a pulling force value of the piston rod of the brake cylinder;
the processing device is used for determining a braking force value according to the tension value, wherein the braking force value is used for representing the force of the wheel subjected to the braking mechanism;
the display device is used for displaying the braking force value.
According to some embodiments of the invention, the processing device includes a signal amplifier and a processor, the pull pressure sensor is connected to the signal amplifier, the signal amplifier is connected to the processor, and the processor is connected to the display device.
According to some embodiments of the invention, the traction locomotive braking system further comprises a relay and a pneumatic valve, the processing device is connected with the relay, the relay is connected with the pneumatic valve, and the pneumatic valve is connected with the braking cylinder;
the processing device is also used for sending a control signal to the relay according to the braking force value and controlling the braking cylinder through the pneumatic valve.
According to some embodiments of the invention, the processing device is further connected to a locomotive tachometer;
the processing device is also used for:
when the locomotive speed exceeds the preset speed, a control signal is sent to the relay to control the mechanism to lock wheels;
and when the braking force value is smaller than the preset braking force value during braking, generating and displaying alarm information.
According to some embodiments of the present invention, the piston rod includes a flange, a mounting shaft ear, a bolt, a lock nut and a torsion-stop nut, a tension pressure sensor is disposed between the flange and the mounting shaft ear, a plurality of bolts sequentially pass through the flange and the tension pressure sensor and respectively cooperate with the lock nut and the torsion-stop nut to fix the tension pressure sensor and the flange, a mounting shaft ear screw is disposed at the bottom of the mounting shaft ear, the mounting shaft ear screw is connected with the tension pressure sensor, a hole corresponding to the number of the torsion-stop nuts is disposed at the bottom of the mounting shaft ear, the rod of the torsion-stop nut is inserted into the hole, the shaft hole of the mounting shaft ear is used for connecting the brake mechanism, and the flange is used for connecting the brake cylinder.
According to some embodiments of the invention, the brake mechanism comprises a first left connecting rod, a first right connecting rod, a second left connecting rod, a second right connecting rod, a brake connecting rod, a left brake shoe and a right brake shoe;
the first end of the first left connecting rod and the first end of the second left connecting rod are respectively fixed on the vehicle body at the left side of the wheel through a hinge component;
the first end of the first right connecting rod and the first end of the second right connecting rod are respectively fixed on the vehicle body on the right side of the wheel through a hinge component;
the two ends of the brake connecting rod are respectively connected with the left piston rod and the right piston rod;
the second end of the first left connecting rod is hinged to the second end of the second left connecting rod at an included angle, and the second end of the second left connecting rod is hinged between the left piston rod and the left brake cylinder;
the second end of the first right connecting rod is hinged to the second end of the second right connecting rod at an included angle, and the second end of the second right connecting rod is hinged between the right piston rod and the right brake cylinder;
the left brake shoe is connected to the first left connecting rod, and the right brake shoe is connected to the first right connecting rod.
According to some embodiments of the invention, the processing device is further configured to:
obtaining a stress model of a braking mechanism during braking;
determining a moment arm parameter according to the stress model;
based on a static moment balance principle, a braking force value is determined according to the tension value and the arm of force parameter.
According to some embodiments of the invention, the braking force value is determined by the following formula:
Figure GDA0004133214170000021
wherein F is 1 Represents the braking force value, F 2 Represents the tension value, l, detected by the left piston rod pull-up pressure sensor 1 Indicating the distance from the first end of the first left connecting rod to the joint of the first left connecting rod and the left brake shoe, l 2 Representing the distance from the first end of the first left connecting rod to the point where the force of the second left connecting rod is applied, l 3 Representing the distance from the first end of the second left connecting rod to the point where the force of the first left connecting rod is applied, l 4 Representing the distance from the first end on the second left connecting rod to the connection with the left piston rod.
On the other hand, the embodiment of the invention also provides a brake detection method which is applied to the traction locomotive brake system, and comprises the following steps:
acquiring a tension value from a tension pressure sensor during braking;
obtaining a stress model of a braking mechanism during braking;
determining a moment arm parameter according to the stress model;
based on a static moment balance principle, a braking force value is determined according to the tension value and the arm of force parameter.
In another aspect, embodiments of the present invention also provide a vehicle including a traction locomotive braking system as described above.
The technical scheme of the invention has at least one of the following advantages or beneficial effects: the braking device drives the braking mechanism to brake the wheels through the braking air cylinder, and the pulling pressure sensor is arranged on the piston rod of the braking air cylinder to detect the pulling force value of the braking air cylinder on the braking mechanism. After the processing device obtains the pulling force value of the pulling pressure sensor, the braking force value representing the force of the wheel subjected to the braking mechanism is determined according to the pulling force value, and then the braking force value is sent to the display device for display, so that the braking working condition can be provided for a driver during braking, and the driving safety is improved.
Drawings
FIG. 1 is a schematic diagram of a traction locomotive braking system provided by an embodiment of the present invention;
fig. 2 is a schematic diagram of a piston rod structure provided with a tension and pressure sensor according to an embodiment of the present invention;
FIG. 3 is a schematic view of a brake mechanism according to an embodiment of the present invention;
FIG. 4 is a schematic view of a brake mechanism according to another embodiment of the present invention;
FIG. 5 (a) is a schematic view of a force point of a braking mechanism according to an embodiment of the present invention;
FIG. 5 (b) is a schematic illustration of the force applied to a brake mechanism according to an embodiment of the present invention;
FIG. 5 (c) is a schematic diagram of the forces applied to the first left connecting rod according to an embodiment of the present invention;
fig. 5 (d) is a schematic diagram of the acting force applied to the second left connecting rod according to the embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, left, right, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, the description of first, second, etc. is for the purpose of distinguishing between technical features only, and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
The embodiment of the invention provides a traction locomotive braking system, and referring to fig. 1, the traction locomotive braking system of the embodiment of the invention comprises a processing device, a braking device and a display device, wherein the processing device is connected with the display device. The brake device comprises a brake mechanism and brake cylinders, the brake mechanism is arranged on two sides of the wheels, the brake cylinders are connected with the brake mechanism, and a driver can drive the brake mechanism by changing the pressure of gas in the brake cylinders, so that the wheels are locked. The device comprises a brake cylinder, a processing device, a display device, a brake mechanism, a brake force sensor, a processing device, a display device and a control device, wherein the brake cylinder is provided with a piston rod, the piston rod of the brake cylinder is provided with a tension pressure sensor, the tension pressure sensor is electrically connected with the processing device, the tension pressure sensor is used for detecting the tension value of the piston rod of the brake cylinder, namely the tension value of the brake cylinder acting on the brake mechanism, the tension value detected by the tension pressure sensor is sent to the processing device in real time, and the processing device determines a brake force value used for representing the force of the wheel subjected to the brake mechanism according to the tension value, and then sends the brake force value to the display device for display.
According to some embodiments of the present invention, the display device may be a touch screen, a mobile phone, a tablet, a personal computer, etc., and the terminal is not particularly limited in the implementation of the present invention, as long as the display device can interact with the processing device and display the braking force value.
According to some embodiments of the invention, referring to fig. 1, the processing device includes a signal amplifier and a processor, the pull pressure sensors are each connected to the signal amplifier, the signal amplifier is connected to the processor, and the processor is connected to the display device.
In particular, the signal amplifier may have multiple inputs, such as a four-way input or an eight-way input. In the embodiment, the diesel locomotive is taken as an example, the diesel locomotive is provided with eight rail wheels, eight braking devices are correspondingly arranged on the eight wheels respectively, a pulling pressure sensor in each braking device is connected to eight paths of signal amplifiers, and pulling force value signals are amplified by the signal amplifiers and then sent to a processing device for further processing.
According to some embodiments of the present invention, referring to fig. 1, the traction locomotive braking system according to the embodiment of the present invention further includes a relay and a pneumatic valve, the processing device is connected to the relay, the relay is connected to the pneumatic valve, and the pneumatic valve is connected to the brake cylinder. The processing device is also used for sending a control signal to the relay according to the braking force value and controlling the braking cylinder through the pneumatic valve. In the embodiment of the invention, the control of the processing device on the brake cylinder can be realized by arranging the relay and the pneumatic valve between the processing device and the brake cylinder. The processing device generates a control signal and sends the control signal to the relay, the relay converts the control signal into control current for controlling the pneumatic valve, and the pneumatic valve compresses air in the brake cylinder after being opened, so that the brake mechanism is driven, and automatic braking is realized.
According to some embodiments of the present invention, the processing device further performs the following steps:
when the locomotive speed exceeds the preset speed, a control signal is sent to the relay to control the braking mechanism to lock wheels;
when the braking force value is smaller than the preset braking force value during braking, generating and displaying alarm information.
In this embodiment, the processing device is connected with the locomotive velometer, and the locomotive speed cannot be too fast during tunnel construction, so that the processing device acquires the locomotive speed in real time, and when the locomotive speed exceeds the preset speed, the processing device sends control information to control the braking mechanism to brake, so as to realize automatic deceleration and ensure construction safety.
In this embodiment, a contact sensor is disposed on a brake gear of a locomotive, the contact sensor is connected with a processing device, when the contact sensor detects a signal, it indicates that a driver has a braking intention, the processing device detects whether a braking force value at this time is smaller than a preset braking force value, if the braking force value is smaller than the preset braking force value, it indicates that the braking force of the braking device is insufficient, the processing device generates an alarm message and sends the alarm message to a display device to prompt the driver to repair the braking device.
In this embodiment, a contact sensor is disposed on a parking gear of a locomotive, the contact sensor is connected with a processing device, when the contact sensor detects a signal, it indicates that a driver has a parking intention, the processing device detects whether a braking force value at this time is 0, and if the braking force value is 0, the processing device sends an automatic parking instruction to prevent a car sliding accident.
According to some embodiments of the present invention, referring to fig. 2, the piston rod includes a flange 240, a mounting shaft lug 210, bolts 250, lock nuts 260 and torsion-stop nuts 220, a tension-pressure sensor 230 is disposed between the flange and the mounting shaft lug, a plurality of bolts sequentially pass through the flange and the tension-pressure sensor and respectively cooperate with the lock nuts and the torsion-stop nuts to fix the tension-pressure sensor and the flange, a mounting shaft lug screw 270 is disposed at the bottom of the mounting shaft lug, the mounting shaft lug screw is connected with the tension-pressure sensor, a hole corresponding to the torsion-stop nuts is disposed at the bottom of the mounting shaft lug, the rod of each torsion-stop nut is correspondingly inserted into one hole, the shaft hole of the mounting shaft lug is used for connecting a brake mechanism, and the flange is used for connecting a brake cylinder. The piston rod as shown in fig. 2 may be provided with eight bolts, four lock nuts and four torsion-stop nuts corresponding to the eight bolts, and four apertures corresponding to the four torsion-stop nuts at the bottoms of the mounting lugs.
According to some embodiments of the present invention, referring to fig. 3, the braking mechanism includes a first left connecting rod 312, a first right connecting rod 330, a second left connecting rod 311, a second right connecting rod 350, a brake connecting rod 380, a left brake shoe 313 and a right brake shoe 320. The first end of the first left connecting rod and the first end of the second left connecting rod are fixed on the vehicle body on the left side of the wheel 360 through hinge components respectively, and the first end of the first right connecting rod and the first end of the second right connecting rod are fixed on the vehicle body on the right side of the wheel through hinge components respectively. The two ends of the brake link are connected with the left piston rod 390 and the right piston rod 370, respectively. The second end of the first left connecting rod is hinged at an included angle to the second end of the second left connecting rod, which is hinged between the left piston rod and the left brake cylinder 310. The second end of the first right connecting rod is hinged to the second end of the second right connecting rod at an included angle, and the second end of the second right connecting rod is hinged between the right piston rod and the right brake cylinder 340. The first left connecting rod is connected with a left brake shoe, and the first right connecting rod is connected with a right brake shoe. At least one of the left piston rod or the right piston rod is provided with a pull pressure sensor 230.
In another embodiment of the present invention, there is provided another brake mechanism structure, referring to fig. 4, comprising a left connecting rod 450, a right connecting rod 430, a connecting rod 440, a left brake shoe 460 and a right brake shoe 420. The first end of the left connecting rod is fixed on the left side of the wheel 360 through a hinge component, the first end of the right connecting rod is connected with a piston rod on a brake cylinder 410, a tension pressure sensor 230 is arranged on the piston rod, and the brake cylinder is fixed on the right side of the wheel. The two ends of the connecting rod are respectively hinged with the second ends of the left connecting rod and the right connecting rod. The left connecting rod is connected with a left brake shoe, and the right connecting rod is connected with a right brake shoe.
According to some embodiments of the invention, the processing means determine the braking force value by:
obtaining a stress model of a braking mechanism during braking;
determining a moment arm parameter according to the stress model;
based on a static moment balance principle, a braking force value is determined according to the tension value and the arm of force parameter.
Specifically, to analyzeAs shown in fig. 3, for example, the left side force of the brake mechanism is applied, referring to fig. 5 (a), the left side force applying point of the brake mechanism includes a connection point O of the first left connecting rod and the hinge member 1 Connection point O of the second left connecting rod and the hinge component 2 The connecting point A of the first left connecting rod and the left brake shoe, the acting point B of the second left connecting rod on the first left connecting rod and the acting point C of the first left connecting rod on the second left connecting rod. Referring to FIG. 5 (b), the external force applied to the brake mechanism during braking includes the force applied to the brake mechanism at O 1 And O 2 Receives the thrust force F of the wall surface 3 And F 4 Thrust force F from wheel 1 Thrust force F from brake cylinder 2 . Referring to fig. 5 (c), the force applied to the first left connecting rod includes F 4 、F 1 Thrust force F from the second left connecting rod 5 . Referring to fig. 5 (d), the force applied to the second left connecting rod includes F 3 、F 2 Thrust force F from the first left connecting rod 6 Wherein F is 5 And F 6 The reaction force is mutually generated. The thrust force F2 of the self-braking cylinder is a pulling force value detected by a pulling pressure sensor, and the thrust force F1 of the wheel and the force of the wheel applied by the braking mechanism are reaction forces, namely the magnitude of the F1 is a braking force value.
Under the brake steady state, according to the static moment balance principle, can obtain:
F 5 ×I 2 ＝F 1 ×I 1 ；
F 2 ×I 4 ＝F 6 ×I 3 ；
since the magnitudes of F5 and F6 are equal, the calculation formula of the braking force value is:
Figure GDA0004133214170000061
wherein F is 1 Represents the braking force value, F 2 Represents the tension value, l, detected by the left piston rod pull-up pressure sensor 1 Indicating the distance from the first end of the first left connecting rod to the joint of the first left connecting rod and the left brake shoe, l 2 Representing the first leftThe distance from the first end of the connecting rod to the position subjected to the force of the second left connecting rod 3 Representing the distance from the first end of the second left connecting rod to the point where the force of the first left connecting rod is applied, l 4 Representing the distance from the first end on the second left connecting rod to the connection with the left piston rod.
In this embodiment, the processing device determines the force arm parameter based on the stress model of the braking mechanism, and then determines and displays the braking force value according to the detected tension value of the braking cylinder and the corresponding force arm parameter, so that the driver can determine the force applied to the wheels, and thus determine the braking condition of the locomotive. For braking mechanisms with different structures, the detection of the tension sensor on the braking cylinder and the calculation of the processing device can provide a standard braking force value for a driver as a reference.
The embodiment of the invention also provides a brake detection method which is applied to the traction locomotive brake system in the previous embodiment, and the brake detection method in the embodiment of the invention comprises the following steps:
s1, acquiring a tension value from a tension pressure sensor during braking;
s2, obtaining a stress model of a braking mechanism during braking;
s3, determining a force arm parameter according to the stress model;
s4, determining a braking force value according to the tension value and the arm of force parameter based on the static moment balance principle.
The embodiment of the invention also provides a vehicle, comprising the traction locomotive braking system of the previous embodiment.
It will be appreciated that the foregoing embodiments of the locomotive braking system are applicable to the present vehicle embodiment, and that the functions specifically implemented by the present vehicle embodiment are the same as those implemented by the foregoing embodiments of the locomotive braking system, and the beneficial effects achieved by the foregoing embodiments of the locomotive braking system are the same as those achieved by the foregoing embodiments of the locomotive braking system.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.

Claims (7)

1. The traction locomotive braking system is characterized by comprising a processing device, a braking device and a display device, wherein the processing device is connected with the display device;
the brake device comprises a brake mechanism and brake cylinders, the brake mechanism is arranged on two sides of a wheel, the brake cylinders are connected with the brake mechanism, and the brake cylinders are used for locking the wheel by controlling the brake mechanism to move; the braking mechanism comprises a first left connecting rod, a first right connecting rod, a second left connecting rod, a second right connecting rod, a braking connecting rod, a left braking shoe and a right braking shoe; the first end of the first left connecting rod and the first end of the second left connecting rod are respectively fixed on the vehicle body at the left side of the wheel through a hinge component; the first end of the first right connecting rod and the first end of the second right connecting rod are respectively fixed on the vehicle body on the right side of the wheel through a hinge component; the two ends of the brake connecting rod are respectively connected with the left piston rod and the right piston rod; the second end of the first left connecting rod is hinged to the second end of the second left connecting rod at an included angle, and the second end of the second left connecting rod is hinged between the left piston rod and the left brake cylinder; the second end of the first right connecting rod is hinged to the second end of the second right connecting rod at an included angle, and the second end of the second right connecting rod is hinged between the right piston rod and the right brake cylinder; the first left connecting rod is connected with a left brake shoe, and the first right connecting rod is connected with a right brake shoe;
a pulling pressure sensor is arranged on the left piston rod or the right piston rod of the brake cylinder, the pulling pressure sensor is electrically connected with the processing device, and the pulling pressure sensor is used for detecting the pulling force value of the piston rod of the brake cylinder;
the processing device is used for determining a braking force value according to the tension value, wherein the braking force value is used for representing the force of the wheel subjected to the braking mechanism;
the display device is used for displaying the braking force value;
wherein the braking force value is determined by the following formula:
Figure FDA0004133214160000011
wherein F is 1 Represents the braking force value, F 2 Representing the tension value detected by the left piston rod or the right piston rod upward-pulling pressure sensor, l 1 Indicating the distance from the first end of the first left connecting rod to the joint of the first left connecting rod and the left brake shoe, l 2 Representing the distance from the first end of the first left connecting rod to the point where the force of the second left connecting rod is applied, l 3 Representing the distance from the first end of the second left connecting rod to the point where the force of the first left connecting rod is applied, l 4 Representing the distance from the first end on the second left connecting rod to the connection with the left piston rod.
2. The traction locomotive braking system of claim 1, wherein the processing device comprises a signal amplifier and a processor, the pull pressure sensor connected to the signal amplifier, the signal amplifier connected to the processor, the processor connected to the display device.
3. The traction vehicle braking system of claim 1, further comprising a relay and a pneumatic valve, wherein the processing device is coupled to the relay, wherein the relay is coupled to the pneumatic valve, and wherein the pneumatic valve is coupled to the brake cylinder;
the processing device is also used for sending a control signal to the relay according to the braking force value and controlling the braking cylinder through the pneumatic valve.
4. The traction locomotive braking system of claim 3 wherein the processing device is further connected to a locomotive velometer;
the processing device is also used for:
when the locomotive speed exceeds the preset speed, a control signal is sent to the relay to control the braking mechanism to lock wheels;
and when the braking force value is smaller than the preset braking force value during braking, generating and displaying alarm information.
5. The traction locomotive brake system according to claim 1, wherein the piston rod comprises a flange, a mounting shaft lug, bolts, locking nuts and torsion-proof nuts, a tension-pressure sensor is arranged between the flange and the mounting shaft lug, a plurality of bolts sequentially penetrate through the flange and the tension-pressure sensor and respectively cooperate with the locking nuts and the torsion-proof nuts to fix the tension-pressure sensor and the flange, a mounting shaft lug screw is arranged at the bottom of the mounting shaft lug, the mounting shaft lug screw is connected with the tension-pressure sensor, holes corresponding to the torsion-proof nuts in number are arranged at the bottom of the mounting shaft lug, rods of the torsion-proof nuts are inserted into the holes, shaft holes of the mounting shaft lug are used for connecting the brake mechanism, and the flange is used for connecting the brake cylinder.
6. A method of brake detection for a traction locomotive brake system according to claim 1, said method comprising the steps of:
acquiring a tension value from a tension pressure sensor during braking;
obtaining a stress model of a braking mechanism during braking;
determining a moment arm parameter according to the stress model;
based on a static moment balance principle, determining a braking force value according to the tension value and the arm of force parameter;
wherein the braking force value is determined by the following formula:
Figure FDA0004133214160000021
wherein F is 1 Represents the braking force value, F 2 Representing the tension value detected by the left piston rod or the right piston rod upward-pulling pressure sensor, l 1 、l 2 、l 3 、l 4 All are arm parameters, l 1 Indicating the distance from the first end of the first left connecting rod to the joint of the first left connecting rod and the left brake shoe, l 2 Representing the distance from the first end of the first left connecting rod to the point where the force of the second left connecting rod is applied, l 3 Representing the distance from the first end of the second left connecting rod to the point where the force of the first left connecting rod is applied, l 4 Representing the distance from the first end on the second left connecting rod to the connection with the left piston rod.
7. A vehicle comprising a traction locomotive braking system as claimed in any one of claims 1 to 5.
CN202210542503.6A 2022-05-18 2022-05-18 Traction locomotive braking system, braking detection method and vehicle Active CN114802167B (en)

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