797results about "Aerodynamic brakes" patented technology

The invention relates to an urban tram braking system. The system comprises a braking instruction generation system, a braking control system and an anti-skid system, wherein the braking instruction generation system comprises a braking electronic control unit (BECU) and a braking control unit (BCU) and sends a braking instruction to the BECU; the BECU calculates required braking force according to the braking instruction and loading force detected by a loading pressure sensor and provides the braking force for a traction control unit; the traction control unit feeds a dynamic braking force signal back to the BECU; the BECU calculates air braking force which is needed to be supplemented and controls the BCU to generate braking cylinder pressure so as to realize braking control; the braking instruction generation system is provided with a driver controller, an emergency braking switch and a logic control unit connected with the emergency braking switch; the anti-skid system comprises a speed sensor arranged on a wheel axle and an anti-skid exhaust valve arranged on a braking cylinder pipe; the speed sensor detects a speed signal and transmits the speed signal to the BECU; and the BECU controls the action of the anti-skid exhaust valve according to the speed signal.

The invention provides a brake control device for railway carriages. The brake control device comprises a brake air cylinder, a brake controller, an electric pneumatic change-over valve, a relay valve, an emergency electromagnetic valve, a load adjustment valve, a brake two-way valve, a distribution valve and a working air cylinder, wherein the brake controller outputs a current signal for to the electric pneumatic change-over valve; the electric pneumatic change-over valve converts the current signal into a pilot control pressure signal and then sends to a first pressure input port of the relay valve; the relay valve performs flow amplification on the pilot control pressure signal and inputs a brake cylinder pipe; two pressure input ports of the brake two-way valve are respectively connected with pressure output ports of the emergency electromagnetic valve and the distribution valve through pipelines; the pressure input port of the brake two-way valve is connected with a second pressure input port of the relay valve through the load adjustment valve; and an adjustment signal input port of the load adjustment valve is communicated with two air springs. According to the brake control device, a microcomputer controlled direct electric pneumatic brake system and an air automatic brake system are integrated. Under normal conditions, the direct system is used; and the automatic system is taken as a safe brake method to satisfy rescue and loopback requirements.

The invention provides a control device of an air braking system of rail vehicles. The control device comprises an air brake, a locomotive distribution valve, an operating valve, at least one automatic brake unit, a first two-way valve, a brake electromagnetic valve and a release electromagnetic valve, wherein the unit comprises an equalizing air cylinder, an overcharge air cylinder, a relay valve and an automatic brake valve; an air inlet of the brake electromagnetic valve is connected with a main air pipe; an air outlet of the brake electromagnetic valve and an air inlet of the release electromagnetic valve are connected with a first air inlet of the first two-way valve; an air outlet of the release electromagnetic valve is communicated with the atmosphere; a second air inlet of the first two-way valve is connected with the operating valve through a twelfth pipe; an air outlet of the first two-way valve is connected with a brake cylinder; and the control ends of the brake electromagnetic valve and the release electromagnetic valve are connected with a switch through leads. The switch is mounted at the required position, controls the two electromagnetic valves to inflate and exhaust the brake cylinder and controls the locomotive to brake and release. The control device is reliable in action, simple in connection, easy to manufacture and maintain and low in cost.

The invention discloses an integrated multifunctional parking braking system and a control method thereof. A first bi-directional valve, a dust filtration check valve, a pressure reducing valve, a parking braking electromagnetic valve, a second bi-directional valve, an electric interlocking cock and an outlet in the system are connected in sequence. The first bi-directional valve is connected with a first air source and a second air source. A parking braking air cylinder is arranged between the dust filtration check valve and the pressure reducing valve. The second bi-directional valve is connected with a comparison outlet. A first pressure switch and a second pressure switch are arranged between the electric interlocking cock and the outlet. The integrated multifunctional parking braking system and the control method thereof have the advantages that the original parking braking function is reserved, meanwhile, the function of the double air sources from a total air pipe and a train pipe (or other external air sources) is achieved, and it can be guaranteed that parking braking can be automatically implemented when total air does not exist; meanwhile, the functions of parking braking status display, mechanical display or digital display, manual release and the like can be achieved; an air board integration mode is adopted, the size is small, the integration degree is high, and rapid installation or maintenance is facilitated.

The invention discloses a control method and device for a locomotive brake average tube. The device comprises an air source filtering device, a first solenoid valve, a pressure boost valve, a third solenoid valve, a second solenoid valve, a control unit, a pressure detection device, a control air cylinder and a pneumatic reversing valve, wherein the first solenoid valve, the pressure boost valve and the third solenoid valve are connected with the air source filtering device and arranged on an air circuit installing plate, the second solenoid valve is connected with the air source filtering device and arranged on the air circuit installing plate, the control unit and the pressure detection device are connected with the first solenoid valve and the second solenoid valve, the control air cylinder is connected with the pressure boost valve and the pressure detection device, the pneumatic reversing valve is connected with the pressure boost valve and the third solenoid valve, and an air outlet of the pneumatic reversing valve is connected with an output port of the average tube. The working state of a locomotive local pusher engine can be set automatically, the operation of setting the working state of the locomotive local pusher engine is simplified, the precontrol pressure of the average tube is controlled in a closed-loop mode, the response speed of a brake cylinder of the locomotive pusher engine is increased, and the synchronism of the brake cylinder of the locomotive local pusher engine is improved.

A compressed air control and distribution device for return and rescue of motor train units is characterized by comprising a hoisting frame, a BP rescue conversion device, two air storage cylinders, a valve plate and a hanging plate, wherein a hoisting hole for hoisting the whole device is formed in the hoisting frame, a plurality of installing holes are formed in the hoisting plate according to the positions of the valve plate, air storage cylinder installing hoisting belts and the hoisting plate to facilitate fastening and installation conducted on the valve plate, the air storage cylinders and the hanging plate through bolts, the BP rescue conversion device is installed on the hoisting frame and used for achieving the function of converting electric signals and air way signals during return and rescue. A complicated return and rescue control device is integrated through integrated design concept under the condition that a vehicle body chassis zone space is limited, mutual return and rescue of different types of motor train units are achieved functionally, and convenience is brought to running organization. In addition, the compressed air control and distribution device is simple to install and fix and convenient to maintain and test, and occupied space is greatly decreased.

The invention discloses an air stand-by brake system and brake method. The air stand-by brake system comprises a brake controller, an equalizing reservoir, a relay valve, an input valve and a throttle valve; the air stand-by brake system is connected with an original train pipe of a locomotive through the input valve, and connected with an original main blast line of the locomotive through the throttle valve; if a main brake control system is power-off, the input valve is used for being opened to a switch-on position, so that an air channel is communicated; the brake controller is used for controlling the pressurization and depressurization of the equalizing reservoir; the equalizing reservoir is used for taking the pressure of the equalizing reservoir as the pilot pressure of the relay valve; and the relay valve is used for controlling the pressure change of the train pipe according to the pressure change of the equalizing reservoir, wherein the pressure of the equalizing reservoir and the pressure of the train pipe are in a synchronous state. According to the embodiment of the invention, the brake function of the locomotive can be ensured, so that the locomotive can continue to run and maintain to a locomotive depot, and then is maintained, in such a way, the locomotive does not stop on a trunk railway for a long tine, thereby reducing the effect on the order of a railway.

The invention relates to a method and system for braking a railway vehicle, which have the advantages of higher brake force, shorter idling braking time and brake cylinder boosting and relieving time and capabilities of shortening the braking distance, arranging passenger trains and adjusting the brake force according to the change of the weight of the vehicle. A high-friction-coefficient composition brake shoe with a higher friction coefficient is adopted, and the pressures of the brake cylinder and the brake shoe are controlled on the basis of measurement of the vehicle load by using a sensing valve, so that stepless control of the brake force of a quick freight car is realized; and the idling braking time and the brake cylinder relieving time are shortened by changing the inflation anddeflation time of the brake cylinder. The invention provides a method and system for braking a quick railway freight car. By adopting the method and system, the stepless change of the brake force canbe realized with the load increase and decrease change of the vehicle at the same time of improving the brake force and shortening the idling breaking time, therefore the safety traveling braking distance is ensured; meanwhile, the device has the advantages of high reliability, high vibration insulation, high dynamic performance, higher linearity and high sensitivity.

The invention discloses a train anti-skid control method based on an optimal slip rate and a control device thereof. The method comprises the following steps: firstly, according to a braking cylinderpressure, calculating a locomotive braking force; secondly, according to a non-linear relationship between an adhesion coefficient and a slip rate, calculating the optimal slip rate through an extremevalue search algorithm; and according to a difference value of an actual slip rate and the optimal slip rate, through running a PID control algorithm, solving to obtain a braking force moment by an anti-skid valve control panel; based on the braking force moment, controlling an anti-skid valve switch to exhaust air or re-charge air to the braking cylinder, adjusting the pressure of the braking cylinder until the braking force moment is solved. The anti-skid control method is capable of realizing the optimal slip rate as a control objective, through adjusting parameters of a controller, enabling a wheel slip rate to be near the optimal slip rate, and guaranteeing that a train has the good anti-skid control effect while driven in different rail environments.

The invention relates to a microcontroller control electro-pneumatic brake unit for locomotive brake systems and aims to achieve conversion of electrical signals of a locomotive brake system and an air brake pressure signal. The microcontroller control electro-pneumatic brake unit comprises an air circuit portion and an electrical portion; the air circuit portion mainly comprises an intake electromagnetic valve, an exhaust electromagnetic valve and a pressure sensor. The electrical portion mainly comprises a life signal module, an RS232 communication module, an analog input module, a CAN (controlled area network) communication module, a BI (batch input) module, a master control CPU (central processing unit) module, a monitoring CPU module, a high-speed electromagnetic valve drive module, an analog acquiring module and a power processing module powering the modules above. The electro-pneumatic brake units in a brake control system can automatically control train tubes, distributor valves and independent brake pressures, separately, automatically in response to control commands of the electro-pneumatic brake units, the stability of the brake control system is improved, and fault rate is decreased.

The invention discloses a control system for a distribution valve of a brake system of a storage battery power engineering truck, belonging to the control field of the brake system in the storage battery power engineering truck. The control system comprises an electronic distribution valve closed loop control system, a reserve air distribution valve control system and a hard braking fast pressurizing control system, wherein the electronic distribution valve closed loop control system is started under the normal condition; the reserve air distribution valve control system is started when the electronic distribution valve closed loop control system fails; and the hard braking fast pressurizing control system is used under the emergent condition. In the invention, closed loop control is carried out on the braking cylinder of the storage battery power engineering truck through controlling the pressure of a wind cylinder in advance, so that the control precision of the braking cylinder pressure can be greatly improved; the reliability of the brake system can be improved through using a reserve air distribution valve; and an emergent braking fast pressurizing passageway can ensure that the emergent braking action can be generated in a short time under an emergent circumstance, thus the safety of the storage battery power engineering truck can be guaranteed.

A wind resistance braking device comprises a wind resistance braking board and a driving mechanism; the driving mechanism comprises a driving rod; the driving rod is hinged onto the wind resistance braking board; and one end of the wind resistance braking board is hinged on a fixed seat and is driven by the driving rod to rotate around the fixed seat. The wind resistance braking board can be rotated around the fixed seat for a corresponding angle, and when airflow flows towards the wind resistance braking board, the wind resistance braking board can generate certain air resistance which directly pushes the wind resistance braking board to rotate through the driving rod, so that the required driving force is small, the efficiency is improved, and energy is saved; two wind resistance braking boards are symmetrically mounted on side wall plates on the two sides of a motor car body, so that a motor car keeps a good balance; rain water, dust and other impurities can not fall in the wind resistance braking device to influence the wind resistance braking device, so that the service life of the wind resistance braking device is prolonged; and the mounting areas of the two sides of the motor car body are large, so that the wind resistance braking device can be mounted and used conveniently.

The invention relates to a wagon brake system, which comprises a brake control system and a base control system. The base control system comprises that each car axle is provided with at least one disc brake device; the disc brake device comprises a brake disc (11) rotating with the car axle, a lever system (12), a brake pad (13), and a unit brake cylinder (14); certain gap is formed between the brake pad and the brake disc; the lever system is acted on the brake pad; the brake control system comprises an antiskid unit (9) communicated with the unit brake cylinder; compressed air entering the unit brake cylinder through the antiskid unit is converted into an acting force and output by the unit brake cylinder, and is amplified to the brake pad through the lever system; a positive pressure acted on the brake disc is formed by the brake pad; when wheel set sliding is detected to generate by the antiskid unit, an access from the brake control system to the unit brake cylinder is closed; and an access from the unit brake cylinder to atmosphere is opened; therefore, a brake force is eased so as to lead the car axle to resume to normal speed reduction rapidly. The wagon brake system can be adopted to improve the brake power, and is suitable for improving the speed of a wagon.

The invention discloses a wireless idle brake control system and control method for a railway wagon. The control system comprises a locomotive brake control system and a vehicle brake control system; the locomotive brake control system comprises an operator, a display screen and a control module; the vehicle brake control system comprises an electric control device and an execution module; the control module is communicated with an electric control device of each vehicle by a wireless ad hoc network; the control module and the electric control module of each vehicle are nodes of the wireless ad hoc network. By using the wireless ad hoc network technology, in the operation of a railway wagon train, a brake release signal becomes a wireless network signal and is transmitted to the rear vehicles, and the transmission speed is improved, so the rear vehicles act at the time as consistent as possible, the longitudinal force in the brake process of the train is reduced, the impact among the vehicles is reduced, a bus cable does not need to be arranged on the train due to the wireless signal transmission mode, the operation that stations are arranged along the railway line as relay points is not needed, and the influence on the environment of the railway line is smaller.

The invention discloses a controlling device capable of automatically cutting off a train pipe and exhausting in case of an undervoltage main blast line and a control method. The controlling device comprises a pneumatic valve, wherein the left and right sides of the pneumatic valve are provided with valve ports, the valve port at the left side of the pneumatic valve is connected with a train pipeoutlet of a locomotive equalizing reservoir relay valve, the valve port at the right side of the pneumatic valve is connected with a train pipe inlet of a locomotive distributing valve, an exhaust outlet is arranged at one side of the pneumatic valve, the bottom of the pneumatic valve is provided with an actuating valve port, a magnetic valve is arranged below the pneumatic valve, an air inlet and an air outlet are arranged on the magnetic valve, the air inlet at the top of the magnetic valve is connected with a locomotive main blast line, the air outlet is connected with the actuating valve port, and an exhaust port is also arranged on the magnetic valve. The connection, isolation and automatic exhaust of the train pipe can be controlled by the switch-on and switch-off of an electronic control valve; and the train pipe cutoff and automatic exhaust can be realized on an air path in case of the undervoltage main blast line communicated with the pneumatic valve.

The invention discloses a high-speed train wind resistance braking device, which comprises a box fixedly embedded to the top of a train. Opening mechanisms, locking devices, a driving mechanism, a transmission mechanism, a locking mechanism and an angle sensor are arranged in the box. The driving mechanism is connected with the transmission mechanism, upper ends of the opening mechanisms and the locking devices contact with middles of inner surfaces of brake wind wing plates, and the inner surfaces of the brake wind wing plates refer to surfaces, in a roof, of the folded brake wind wing plates. Rocker arms are mounted on retaining bearing seats which are mounted on a bottom plate of the box, the rocker arms rotate based on the retaining bearing seats, the locking mechanism is used for controlling rotation angles of the rocker arms, the brake wind wing plates are mounted on the rocker arms, and the angle sensor is used for measuring rotating angles of the rocker arms. The high-speed train wind resistance braking device is excellent in braking effect and capable of meeting different requirements of service braking and emergency braking states, and a function of locking the brake windwing plates in any angles ranging from 0 to 75 degrees can be realized.

The invention discloses a high-speed train braking force allocating optimizing controlling method, and relates to a high-speed train braking force allocating optimizing controlling system. The high-speed train braking force allocating optimizing controlling method and the system thereof is used for coordinative controlling for to-be-applied braking force of all sections of a train. The high-speed train braking force allocating optimizing controlling system comprises a braking force allocating optimizing controlling module, the module obtains the adhesion gravity FNi based on a single section train stressing model, and the high-speed train braking force allocating optimizing controlling system further comprises a comparator, a multiplier, a braking force allocating optimizing controlling unit and a braking force re-allocating and an optimizing unit thereof, wherein the comparator and the multiplier are used for obtaining the train adhesion force constraint condition F[mu]; and the high-speed train braking force allocating optimizing controlling method comprises calculation for the adhesion gravity, determination for the train adhesion force constraint condition, braking force optimizing controlling algorithm for electric braking priority and a braking force re-allocating method and optimizing algorithm thereof. According to the high-speed train braking force allocating optimizing controlling method and the system thereof, safe, stable and reliable braking of the train is achieved under various complex rail surface situation condition by following the changing dynamic process during the adhesion status of the train, the problem of braking sliding of the high-speed train is solved effectively, and stability and accuracy of the high-speed train braking controlling system are further improved.