165results about "Aerodynamic brakes" patented technology

The bogie weighing device comprises a weighing valve and a force transmission mechanism, an air inlet of the weighing valve is communicated with an auxiliary air cylinder, an air outlet of the weighing valve is communicated with a distribution valve in a vehicle braking system, the weighing valve is fixed to a framework of a vehicle bogie, and the force transmission mechanism is connected with the framework and can rotate around a connecting point. One end of the force transmission mechanism is connected with the weighing valve, and the other end of the force transmission mechanism is connected with the hanging bracket. Stepless regulation of vehicle braking can be achieved.

The present application provides an air supply control system, method, device and medium for a rail vehicle, wherein the air supply control system includes a control module, an air supply module and an air cylinder module, wherein the control module is used to generate an air supply instruction based on the pressure value collected in the air cylinder module and send the air supply instruction to the air supply module; the air supply module is used to receive the air supply instruction and, based on the air supply instruction, provide compressed air to the air cylinder module to increase the pressure value in the air cylinder module to provide working air to the pneumatic flow receiving device and the brake system. According to the system and method, the air supply instruction is sent to the air supply module through the control module, and the air supply module supplies air to the pneumatic flow receiving device or the brake system, thereby enabling the pneumatic flow receiving device and the brake system to operate normally and ensuring the normal use of the pneumatic flow receiving device and the brake system.

The utility model provides a bogie device for track engineering machinery. The bogie device for the track engineering machinery comprises four sets of primary suspension devices which are installed at the positions, close to the two sides, of the bottom of a framework respectively. Two axles are installed at the positions, close to the two sides, of the bottom of the framework through axle box devices respectively, wheels are installed at the two ends of each axle respectively, lever type foundation braking devices are installed at the positions, close to the two sides, of the bottom of the framework respectively, each lever type foundation braking device comprises two braking levers, and the braking levers are arranged on the two sides of the framework respectively. The top end of one brake lever is provided with a horizontal lever body through a connecting rod, and the other end of each horizontal lever body is provided with a brake cylinder. According to the bogie device for the track engineering machinery, the basic braking capacity of a vehicle is effectively improved by increasing the configuration number of the brake shoes, the cost reduction effect is obvious compared with a unit brake type basic braking device, and meanwhile higher application stability is achieved.

The utility model discloses a railway vehicle braking system and a railway vehicle. A main pipe of the railway vehicle braking system is provided with a rescue entrance; the main pipe is communicated with an input port of the pressure valve; an output port of the pressure valve is communicated with an input port of the brake; the main pipe is communicated with an input port of the pedal valve, an output port of the pedal valve is communicated with an input port of the switch valve, and the output port of the switch valve and the rescue pressure regulating pipe can selectively convey fluid to a pressure regulating port of the pressure valve to regulate the pressure of the fluid flowing from the input port of the pressure valve to the output port of the pressure valve. The railway vehicle can be normally braked, and the braking force for normally braking the railway vehicle can be synchronously adjusted; rescue braking can be carried out on the railway vehicle, and the braking force for rescue braking of the railway vehicle can be synchronously adjusted; even if the pedal valve of the rail vehicle is operated by mistake, the rescue vehicle is not influenced to control the rail vehicle to carry out rescue driving or rescue braking.

The present invention discloses a brake beam module and a brake structure containing the same, comprising an assembly beam, a connecting rod, a brake cylinder, and a cooler. The end of the assembly beam is rotatably connected to a wheel frame, and a wheel is installed on the surface of the wheel frame. When the wheel is braked, the first electrically controlled valve is opened, so that the high-pressure gas in the first gas tank controls the brake cylinder to contract, and the brake cylinder drives the brake seat and the brake pad to fit onto the wheel for braking. The brake pad contacts the rolling surface of the wheel with a large contact area, so that the wheel can stop rotating quickly to shorten the braking distance, and the brake pad and the wheel are cooled to avoid the problem of thermal attenuation of the brake pad. When the wheel is braked continuously, good braking force is maintained, and the brake pad clamps the wheel at two symmetrical points on the wheel, so that the friction resistance applied to the wheel is more uniform, and when the wheel is braked, the wheel is prevented from being subjected to different braking forces.

This application discloses a hydraulic valve control method, control device, and vehicle hydraulic brake control system. The hydraulic valve control method includes: obtaining a currently requested target pressure value and the actual output pressure value corresponding to the hydraulic valve; calculating a control output value based on the target pressure value and the actual output pressure value using a preset closed-loop control algorithm model; and adjusting the duty cycle of the drive signal output from the valve drive circuit to the hydraulic valve based on the control output value, such that the adjusted duty cycle is equal to the duty cycle corresponding to the control output value. Using this application, the magnitude of the output pressure corresponding to the adjusted hydraulic valve can be precisely controlled.

This application relates to a hydraulic brake cylinder pressure control system and its control method. The control system includes a pressure generation module and a pressure control module. The pressure generation module includes a check valve, an external accumulator, and an accumulator sensor. The check valve is connected to an oil tank. The pressure control module includes a proportional solenoid valve connected to the external accumulator and the brake cylinder; a pressure-holding solenoid valve located at the overflow port of the proportional solenoid valve, which is connected to the oil tank via the pressure-holding solenoid valve; a brake cylinder sensor collecting and outputting the brake cylinder pressure; and a brake cylinder pressure switch electrically connected to the brake cylinder sensor. During the relief condition, the proportional solenoid valve is de-energized and the pressure-holding solenoid valve is energized. During coasting or braking conditions, the proportional solenoid valve is energized, and the pressure-holding solenoid valve is de-energized after a delay. This application reduces the usage rate of the proportional solenoid valve and improves system reliability through the coordinated control of the proportional solenoid valve and the pressure-holding solenoid valve.

The embodiment of the application provides a kind of multi-axis flatcar air brake system, comprising: multiple unit brakes, flatcar total wind pipe, flatcar train pipe and parking control subsystem.Unit brake has brake state, release state and parking state.Parking control subsystem includes parking control pipeline and parking air cylinder assembly, parking control pipeline is connected respectively flatcar total wind pipe and each unit brake parking interface, parking air cylinder assembly is set on parking control pipeline, when parking air cylinder assembly interruption provides parking release air for unit brake, unit brake is in parking state.Brake control subsystem includes brake pipeline and the air path control assembly set on brake pipeline, brake pipeline is connected respectively flatcar train pipe and each unit brake brake interface, air path control assembly is used to control to provide air pressure to unit brake or pass through the passage of unit brake to exhaust air to atmosphere, to adjust unit brake to brake state or release state.

The invention relates to an integrated two-stage empty and load adjusting device for a railway wagon and a control method thereof, and aims to meet the requirements that an existing stepless adjusting device is complex in pipeline and has multiple leakage points, and a heavy load special line only needs two-stage empty and load adjustment, a proportional valve assembly and a sensing valve assembly are integrated into a whole. Installation arrangement is simplified, and pipeline joints and potential leakage risks are reduced. A proportional valve assembly of the device adjusts the compressed air flow from a brake control valve to a brake cylinder, a sensing valve assembly controls connection and disconnection of the brake cylinder and a pressure reduction air cylinder according to the vehicle load state, and a pressure adjusting assembly controls exhaust of a proportional piston back cavity through the pressure of the pressure reduction air cylinder. The sensing valve assembly opens a brake cylinder and pressure reduction air cylinder passage when the vehicle is empty and closes when the vehicle is loaded, precise two-stage pressure adjustment of empty and loaded working conditions is achieved, and meanwhile structural light weight, arrangement convenience and system reliability are taken into consideration.

The present invention belongs to the technical field of rail transit vehicles, and particularly relates to a parking brake module for a locomotive, and a control method therefor. The technical solution is as follows: a parking brake module for a locomotive, the parking brake module comprising a two-way valve, wherein a main air pipe air circuit and a train pipe air circuit are respectively connected to two inlet ends of the two-way valve. A main air pipe cock is connected to the main air pipe air circuit, and a train pipe cock is connected to the train pipe air circuit. An intake air circuit is connected to an air outlet of the two-way valve, and a brake air circuit is connected to the other end of the intake air circuit. A pressure-reducing valve and a parking brake electrically controlled valve are sequentially connected to the brake air circuit. An outlet end of the brake air circuit is connected to a front bogie parking brake pipe air circuit and a rear bogie parking brake pipe air circuit, respectively. A front bogie parking brake cock is connected to the front bogie parking brake pipe air circuit, and a rear bogie parking brake cock is connected to the rear bogie parking brake pipe air circuit. Provided in the present invention are a parking brake module for a locomotive and a control method therefor.

The invention relates to the field of rail transit, in particular to a rail transit vehicle electric pneumatic braking control system and method.The control system comprises an electronic braking control unit, a common pre-control branch, an emergency pre-control branch and a relay valve, and the electronic braking control unit is used for controlling the common pre-control branch to output common pre-control pressure; the emergency pre-control branch comprises an emergency valve, a remote relief electromagnetic valve and an empty and load valve, the empty and load valve outputs emergency pre-control pressure corresponding to vehicle load information, and the relay valve receives common and emergency pre-control pressure and selects one of the common and emergency pre-control pressure to output corresponding compressed air to a brake cylinder; the electronic brake control unit analyzes the service brake instruction, the service pre-control pressure and the pressure value at the output position of the relay valve, can judge the emergency valve fault and control the remote relieving electromagnetic valve to empty compressed air of the emergency pre-control branch, and the problems that after the emergency valve fault occurs, the emergency air path pressure is not relieved, and the relieving capacity of the air path pressure is unstable are solved.

The application provides a JZ-7 remote control braking system, which comprises a total air pipe, a first passage, a second passage and a third passage, a relay valve, an equalizing air cylinder, a first high-speed electric air valve, an overcharge air cylinder, a control device, a CCU and a remote network control unit, the total air pipe is connected with the overcharge pipe of the relay valve after being communicated with the first passage, and the gas outlet of the first passage is also communicated with the exhaust port of the overcharge air cylinder; the total air pipe is connected with the equalizing pipe of the relay valve after being communicated with the second passage, and the gas outlet of the second passage is also communicated with the first high-speed electric air valve and the equalizing air cylinder respectively; the total air pipe is connected with the cut-off pipe of the relay valve after being communicated with the third passage, and the train pipe of the relay valve is also connected with an electric air release valve. The application can realize remote networking operation of the braking system, and the locomotive can implement braking and relieving functions without operating the automatic brake valve.

The invention relates to the technical field of railway vehicle braking, and discloses an automatic parking device for a railway vehicle, the automatic parking device comprises a mounting assembly and a parking assembly, the mounting assembly is connected with the vehicle, the parking assembly is connected with the mounting assembly, the mounting assembly comprises a connecting part and a movable part, and the parking assembly is used for controlling the movable part to move close to or away from the connecting part. And meanwhile, locking and unlocking of the movable part are controlled, a mounting piece is arranged at the end of the movable part, and the mounting piece is connected with a vehicle foundation braking device. The method has the effect of not influencing an original vehicle braking system and can be suitable for the integrated braking system vehicle installed in a floating mode.

This invention relates to an air backup braking system and a locomotive. The system includes: a backup switching valve with two positions: normal and air position; a backup pressure regulating valve; a pressure measuring point; a backup brake valve with three positions: braking, neutral, and release; a backup equalizing pressure cylinder; and a backup relay valve, used to output its A2 port pressure in real time according to the pressure of the equalizing cylinder when the air backup mode is activated. Specifically, in the normal position of the backup switching valve, ports A2 and A3 of the backup switching valve are connected, cutting off the main air supply to the backup brake valve, venting the pressure at the control port C1 of the first, second, and third switching valves, and outputting a high-level signal. In the air position of the backup switching valve, ports A1 and A2 are connected, and the main air supply is simultaneously output through the pressure at port A2 to the control port C1 of the first, second, and third switching valves, and outputting a low-level signal. This invention solves the technical problem of the inability to switch in real time after a locomotive electro-pneumatic brake failure.

This application discloses a release structure and device for train parking brakes, applicable to the field of rail transit technology. During normal train operation, the parking brake isolation valve is open, and the parking brake caliper unit is in a brake release state. When the parking brake isolation valve closes, the gas in the brake cylinder of the parking brake caliper unit is discharged into the atmosphere through the parking brake isolation valve, at which point the parking brake caliper unit is in a braking application state. When the parking brake isolation valve closes, the energization state of the solenoid valve changes to open its own pipe, at which point the solenoid valve opens, and the first bidirectional valve charges the brake cylinder of the parking brake caliper unit through the first air inlet, thus releasing the braking application state of the parking brake caliper unit. With the release structure proposed in this application, after the parking brake caliper unit automatically applies parking brake due to isolation, it is no longer necessary for the driver and passengers to get off the train for manual release, improving operational convenience.

The invention relates to a train wired electric pneumatic braking system. The system is characterized in that a braking instruction is generated through a locomotive brake under the condition that a train executes an electric control air braking mode, and the braking instruction is sent to a locomotive control unit; then the locomotive control unit sends the obtained braking instruction to the vehicle control unit through a train bus; the vehicle control unit controls an electric pneumatic control valve to conduct braking processing according to the received braking instruction; a mode switching instruction for the electric control air braking mode is sent to a vehicle control unit, and then the vehicle control unit switches the electric control air braking mode into an automatic air braking mode according to the received mode switching instruction; the automatic air braking mode is used for instructing braking treatment according to the pressure reduction amount of a train pipe of the train. By the adoption of the method, the train tail safety protection function can be integrated into the train control unit and the electric pneumatic control valve of the train boxcar, and the reliability of train braking control is improved.

The application provides a control method and device for independent release of a brake system. First, brake data of a locomotive is acquired. Then, a target brake state of the locomotive is determined by using the brake data of the locomotive, wherein the target brake state of the locomotive is an emergency brake state, a penalty brake state or an excessive pressure reduction brake state. A speed parameter of the locomotive and a pressure parameter of the locomotive are acquired. Based on the target brake state of the locomotive, execution of an independent release instruction of the locomotive is limited. Thus, the independent release instruction of the locomotive is limited based on the target brake state of the locomotive, control of the independent release of the brake system is realized, and brake safety of the locomotive is ensured.

The present application relates to a kind of rail vehicle anti-skid control method, the method comprises: obtaining the deceleration a 车 And wheel deceleration a 轴 When the deceleration a 车 Of the acquisition value of vehicle is within reasonable range, the deceleration a 车 Of vehicle is filtered;The axle speed of each axle is measured, and the vehicle speed is determined according to the comparison result of wheel deceleration and the deceleration of vehicle;According to the calculation formula of slip rate, the axle speed is calculated, and according to the corresponding relationship between slip rate and adhesion coefficient, the first ideal axle speed and the second ideal axle speed are determined;The measured axle speed is compared with the first ideal axle speed and the second ideal axle speed, to determine the air supply or exhaust or pressure maintenance of anti-skid valve.The present application solves the problem of inaccurate data source in the anti-skid control of rail vehicle in the prior art.

A low-power-consumption derailment detection apparatus for railway freight cars, said apparatus comprising a detection module, a diagnosis module, an actuation module, a power management module and a storage battery; the power management module is mounted near a center plate of a car body, and is used for controlling the storage battery to supply power to the derailment detection apparatus when the vibration acceleration of the car body is greater than a preset threshold value, and controlling the derailment detection apparatus to power off when the vibration acceleration of the car body is not greater than the preset threshold value; the detection module is used for detecting, by means of through-beam laser technology, the positions of wheel sets relative to the car body, and transmitting a detection result to the diagnosis module; the diagnosis module is used for logically determining, on the basis of the detection result, whether a car has derailed, when detecting that the car has derailed, outputting a derailment signal to the actuation module, and when detecting that the car has not derailed, controlling the derailment detection apparatus to power off after a system operates for a short period of time; and the actuation module is used for controlling, after receiving the derailment signal, the train to perform emergency braking. The derailment detection apparatus has a structure that is conveniently assembled and disassembled; and all devices are mounted on a car body, and thus a connecting ring between the car body and a bogie is omited, thereby greatly reducing the workload of mounting and dismounting the automatic derailment detection apparatus during lifting and lowering of the car. The present application also relates to a detection method.

The utility model provides a high-precision flow-controllable electromagnetic exhaust valve for a controllable train tail, and belongs to the technical field of exhaust valves. The problem that detection is inaccurate due to the fact that an existing train tail electromagnetic exhaust valve structure is prone to being damaged by dust is solved. Comprising an electromagnetic valve body and a detection valve body, four independent and mutually-communicated electromagnetic valve cavities are formed in the electromagnetic valve body, a valve element assembly is installed in each electromagnetic valve cavity, an electromagnetic valve body cover is installed at the top of the electromagnetic valve body, and electromagnetic coils corresponding to the valve element assemblies are arranged on the electromagnetic valve body cover; an electromagnetic valve is mounted on the electromagnetic coil, and an air outlet is formed in an electromagnetic valve body; the detection valve body is internally provided with three independent detection cavities, each detection cavity is internally provided with an air pressure sensor, the detection valve body is provided with an air inlet, and the detection valve body is communicated with one of the electromagnetic valve cavities; detection chambers of the three air pressure sensors are higher than the horizontal plane of the air inlet; the air exhaust device is applied to air exhaust on the train air pipe.

To reduce a size of an aerodynamic brake device.SOLUTION: An aerodynamic brake system comprises: a resistance plate which generates air resistance against travel wind of a vehicle, takes a storage state stored inside a vehicle body of the vehicle during non-operation, and takes a projection state projecting from the vehicle body during operation; a lock mechanism which locks the resistance plate in the storage state; and an operation device which releases lock by the lock mechanism, and causes a part of the resistance plate to project from the vehicle body. The operation device is pyrotechnic.SELECTED DRAWING: Figure 2

The invention discloses a railway train brake hose access type wireless remote control brake control device. The invention belongs to the technical field of railway train brake control, and particularly relates to a wireless remote control brake control technology and method for a railway train. The device is inserted between brake hoses of a train vehicle through a bidirectional connector, is sequentially inserted between the train brake hoses from the front part of the train to the rear part of the train, and controls the increase and decrease of the air pressure of the train brake hoses by receiving a wireless signal instruction from a train service machine; the train braking, relieving and recharging effects of the whole train are synchronous and consistent, the longitudinal impact force and the train braking distance of the train are reduced, and safe operation of the train is guaranteed. The device has the power generation and air supply functions, is portable independent equipment, is convenient to assemble and disassemble, does not need to modify a vehicle and add equipment during use, can be disassembled after being used and can be used on other trains, and the cost is reduced. By using the device, the number of marshalling trains can be increased, and the railway transportation efficiency is improved.

This invention relates to a locomotive train pipe constant pressure switching system and control method. The system includes: a first equalizing pressure regulating valve, a second equalizing pressure regulating valve, a switching valve, an electrically interlocked switching valve, the first end of which is connected to the main air duct, and the second end of which is connected to the pre-control port of the switching valve; an electrically interlocked switch connected to the electrically interlocked switching valve; an air circuit cutoff unit connected between the switching valve and the equalizing air cylinder; and an exhaust unit connected to the equalizing air cylinder. The system controls the electrically interlocked switching valve to switch the train pipe constant pressure between the set values ​​of the first and second equalizing pressure regulating valves. Furthermore, when switching from the second to the first equalizing pressure regulating valve, the electrically interlocked feedback signal from the switching valve controls the air supply and exhaust passages of the equalizing air cylinder, causing the pressure in the equalizing air cylinder to decrease over a period of time.

The present invention discloses a constant pressure valve for a rail vehicle anti-skid device, which belongs to the field of rail vehicle braking technology, and comprises: a lower valve body, a middle valve body is fixed on the top of the lower valve body, a first chamber is formed between the lower valve body and the middle valve body, and an exhaust valve is arranged in the first chamber; an upper valve body is fixed on the top of the middle valve body, a second chamber is formed between the middle valve body and the upper valve body, an upper valve cover is fixed on the top of the upper valve body, a third chamber is formed between the upper valve body and the upper valve cover, and an air filling valve is arranged in the third chamber; a through cavity is opened in the middle of the upper valve body, the second chamber and the third chamber are connected through the through cavity, and a one-way valve is also arranged in the through cavity; a plurality of pipes are opened in the middle valve body and the upper valve body. The present invention can automatically prevent and relieve the train from skidding based on the pressure change of the train brake pipe as a signal source; adding a one-way valve can prevent the anti-skid device from affecting the air pressure of the train brake pipe, thereby improving the safety performance of the train.

The invention discloses a locomotive braking system which comprises a main air cylinder, a parking air cylinder, a braking cylinder, a parking pulse electromagnetic valve and a parking braking cylinder. The main air cylinder is respectively connected with a parking air cylinder and a port B of a parking pulse electromagnetic valve; a port P of the parking pulse electromagnetic valve is connected with a parking brake cylinder; the device further comprises a three-linkage cock, a first piston valve, a second piston valve and a third piston valve. When the three-linkage cock is in a first state, the first cock and the third cock are conducted, and the second cock is closed; and in the second state, the first cock and the third cock are both communicated with the atmosphere, and the second cock is conducted. Compared with the prior art, roll-in and roll-out operation in an unpowered state can be achieved only by controlling the three-linkage cock, a manual release device does not need to be operated to manually release the parking brake cylinder, and the operation hidden danger caused by incomplete manual release of parking brake is avoided. And secondly, the situation that parking braking is accidentally applied due to abnormal breakage of the hose, and then the vehicle runs with a brake can be avoided.

The present disclosure relates to a hydraulic braking system and a vehicle, the hydraulic braking system comprising a braking mechanism, a first hydraulic braking unit and a second hydraulic braking unit independent of the first hydraulic braking unit, a first hydraulic pump in the first hydraulic braking unit being communicated with the braking mechanism through a first hydraulic braking oil path to provide hydraulic pressure to the braking mechanism so that the braking mechanism brakes the vehicle normally. An accumulator in the second hydraulic braking unit being communicated with the braking mechanism through a second hydraulic braking oil path to provide hydraulic pressure to the braking mechanism so that the braking mechanism brakes the vehicle in an emergency. The pressure building oil path for realizing normal braking of the vehicle and the pressure building oil path for realizing emergency braking of the vehicle are independent of each other and do not affect each other, when the pressure building oil path of one of them is out of order, the pressure building oil path of the other can normally build pressure, improving the reliability of the hydraulic braking system of the vehicle.

The utility model relates to a pressure monitoring device for an air brake system of a railway wagon, which belongs to the technical field of railway wagons and specifically comprises a detection block arranged between a 120-type valve and a main valve, an installation cover is arranged at the top of the detection block, and a relief air cylinder detection hole, a main pipe detection hole, a brake cylinder detection hole and an auxiliary air cylinder detection hole are arranged on the detection block. A first mounting groove, a second mounting groove, a third mounting groove and a fourth mounting groove are formed in the top of the detection block and are respectively communicated with the relief air cylinder detection hole, the main pipe detection hole, the brake cylinder detection hole and the auxiliary air cylinder detection hole through air guide channels; and an acceleration relief air cylinder sensor, a main pipe sensor, a brake cylinder sensor and an auxiliary air cylinder sensor are respectively mounted in the first mounting groove, the second mounting groove, the third mounting groove and the fourth mounting groove. The valve operating state detection device is reasonable in structure, convenient to mount and capable of detecting the operating states of 120 and 120-1 valves.

The application provides a parking brake manual remote relief labor-saving system, which comprises a compressed air supply pipeline, an execution module, a protection module and a relief device; the relief device comprises a protection cylinder and an execution cylinder; a piston structure is arranged in each of the protection cylinder and the execution cylinder; the protection cylinder is provided with a protection cylinder spring; the piston rod of the protection cylinder is connected with the piston of the execution cylinder through a connecting body; the execution cylinder is provided with an execution cylinder spring; the compressed air supply pipeline is used for supplying compressed air; the execution module is used for controlling the filling or discharging of compressed air into the compressed air cavity of the execution cylinder; the protection module is used for controlling the filling or discharging of compressed air into the compressed air cavity of the protection cylinder; when the parking brake device needs to be relieved, the compressed air cavity of the execution cylinder is controlled to discharge compressed air by the execution module, and the piston rod of the execution cylinder pulls the steel wire rope b to relieve the parking brake device. The application can relieve the parking brake on the vehicle mechanically, can improve the safety of the staff, shorten the fault handling time and reduce the influence of the fault.

The invention relates to a brake cylinder pressure adjusting method based on a virtual air cylinder, and relates to the technical field of brake cylinders. Comprising the following steps: 1, calculating an initial pipeline length and an initial pipeline volume from a pressure-limiting valve to a brake cylinder of the air brake system; step 2, acquiring brake cylinder pressure during empty braking based on the configuration of the air braking system in the step 1; 3, the expected value of pressure reduction of the brake cylinder is obtained through calculation; 4, setting the length and the volume of a connecting pipeline for forming the virtual air cylinder, the volume of a brake cylinder and the volume of an auxiliary air cylinder, and calculating to obtain the volume of the virtual air cylinder; 5, setting the diameter of a connecting pipeline of the virtual air cylinder; and 6, calculating the length of the connecting pipeline according to the volume and the diameter of the virtual air cylinder. Under the condition that the specification of a brake cylinder of an existing railway wagon brake system is not changed, flexible adjustment of the pressure of the brake cylinder is achieved, and the requirement for corresponding reduction of empty wagon brake force of light weight of a railway wagon can be met in a stepless mode within the moving range.

The invention discloses a braking system and a train. The braking system is provided with a first wind resistance braking device which plays a role in wind resistance braking on a head train, a second wind resistance braking device which plays a role in wind resistance braking on the top of a middle train, and a third wind resistance braking device which plays a role in wind resistance braking on the side portion of the middle train. According to the scheme, the third wind resistance braking device is matched with the second wind resistance braking device, the third wind resistance braking device can guide airflow located in front of the second wind resistance braking device, the airflow is obliquely and upwards guided to the second wind resistance braking device, and the airflow is reintegrated; according to the high-speed superconductive electric maglev train, high-quality and high-energy airflow is formed in front of the second wind resistance braking device, the influence on the resistance coefficient of the second wind resistance braking device of each middle train is reduced, the influence on the braking force of a braking system is reduced, and safe braking of the high-speed superconductive electric maglev train is ensured.