566results about "Railway hydrodynamic brakes" patented technology

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.

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.

A brake rigging comprising first and second brake beams. A brake shoe assembly including a brake shoe adjacent each end of brake beams. A first force transfer mechanism connected intermediate first and second ends thereof to the first brake beam for moving a brake shoe into engagement with confronting wheels during braking. A second force transfer mechanism connected intermediate first and second ends thereof for moving brake shoes into engagement with confronting wheels during braking. A first force transmitting device engageable with such second brake beam for rotating such second force transfer mechanism. An adjustable length second force transmitting device having one end connected to the first force transfer mechanism and another end connected to the second force transfer mechanism and an apparatus engageable with such second force transmitting device and a portion of such brake rigging for changing a length of the second force transmitting device.

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 discloses a train pipe low-pressure protection system and method applicable to a locomotive braking system, belonging to the field of locomotive braking systems, and aiming at solving the problems that precontrol pressure fluctuation is large, total wind consumption is high and energy is wasted when the traditional pressure limiting method is adopted and braking force of the locomotive is easy to attenuate. The train pipe low-voltage protection system disclosed by the invention comprises a pressure regulating valve, a two-position three-way pneumatic valve, an or gate shuttle valve, a fireless feedback safety valve, an operating valve and a volume chamber, wherein pressure of the volume chamber is only related to commonly pressure reduction of a train pipe, a channel used for controlling the operating valve is added by virtue of the pressure regulating valve, the two-position three-way pneumatic valve and the or gate shuttle valve, low pressure protection on the train pipe is realized by virtue of the added control channel, and control function of the braking system is improved. By adopting the train pipe low-pressure protection system and method disclosed by the invention, low pressure protection on the train pipe is realized, the problem that leakage is caused in a DK-1 braking system such as a distributing valve, a safety valve and the like is solved, and life cycle operating cost of a locomotive is saved.

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 an electromagnetic evacuated ultraspeed railway system. The electromagnetic evacuated ultraspeed railway system comprises a housing and at least one transporting line which isarranged in the housing; the transporting line comprises an evacuated transportation tube and a train which is positioned in the evacuated transportation tube; and active collision avoidance devices are arranged between compartments of the train and the train head and the compartments. An external electromagnetic propulsion layer is arranged on the internal wall of the evacuated transportation tube; an internal electromagnetic propulsion layer is arranged on the external wall of the train; when the train penetrates through the evacuated transportation tube, homopolar magnetism pushes the trainto advance; and meanwhile, a power generation closed lead configured for the train cuts a magnetic induction line of the external electromagnetic propulsion layer to generate electric energy needed by running. The electromagnetic evacuated ultra-speed railway system is a people and object carrying integrated transportation system with a certain power generation capacity; and according to the electromagnetic evacuated ultra-speed railway system, requirements on external power supply are extremely low; under a mutual effect of an electromagnetic tube and an evacuated environment, the train running speed is highest, the energy consumption is lowest, no fear of influence from any weather is realized, the cost is lowest, and the input-output ratio is highest.

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 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.

The invention relates to a vehicle brake method of a railway vehicle bogie-controlled electronic brake control system. The vehicle brake method comprises the following steps: receiving a brake force signal of a hard brake line by a digital input and output board and sending the brake force signal to a brake management board through in-board network; computing a brake force needed for the whole vehicle by the brake management board; sending a distributed electric brake force to a TCU (Traction Control Unit) through an MVB (Multifunctional Vehicle Bus) for electric braking; when the brake force needed for the whole vehicle is larger than the maximum available electric brake capacity of the whole vehicle, equally distributing a residual brake force to all local units by the brake management board for air braking; sending target air brake pressure to a brake antiskid board through brake internal network by the brake management board; driving an EP pneumatic valve on an air circuit board by controlling two release valves and two holding valve electromagnetic valves by the brake antiskid board, thus enabling a brake cylinder to achieve the target brake pressure.

A pressure control method for a brake cylinder of a magnetically levitated train comprises the steps that the error between an actual value of the brake cylinder pressure and a final target value of the brake cylinder is worked out and recorded as a target error; the error between the actual value of the brake cylinder pressure and a target value of the impulse limit of the brake cylinder is worked out and recorded as a transient error; a first threshold value and a second threshold value are set; when the target error is larger than the first threshold value, an inflating and deflating electromagnetic valve is opened normally; when the target error is larger than the second threshold value but smaller than the first threshold value, the open time of the inflating and deflating electromagnetic valve during one control cycle is adjusted according to the transient error and recorded as a rough adjusted duty ratio; when the target error is smaller than the second threshold value, the open time of the inflating and deflating electromagnetic valve during one control cycle is adjusted according to the transient error and recorded as a fine adjusted duty ratio; and the rough adjusted duty ratio is larger than the fine adjusted duty ratio. The method is conducted based on the target pressure and the impulse limit target, on the premise that the impulse limit target and the target pressure of the brake cylinder are met, more precise control can be achieved, the brake response time is shortened, the brake distance is decreased, and the steady-state performance of the brake cylinder is improved.