794 results about "Track gauge" patented technology

A system and method for inspecting railroad track is disclosed. The disclosed system includes lasers, cameras, and a processor. The lasers are positioned adjacent the track. The laser emits a beam of light across the railroad track, and the camera captures images of the railroad track having the beam of light emitted thereon. The processor formats the images so that they can be analyzed to determine various measurable aspects of the railroad track. The disclosed system can include a GPS receiver or a distance device for determining location data. The measurable aspects that can be determined by the disclosed system include but are not limited to the spacing between crossties, the angle of ties with respect to rail, cracks and defects in surface of ties, missing fastener components, misaligned fastener components, sunken tie plates, raised spikes, rail wear, gage of rail, ballast height relative to ties, size of ballast stones, and break or separation in the rail. The system includes one or more algorithms for determining these measurable aspects of the railroad track.

The invention discloses a variable-track-gauge wheel set and a locking mechanism thereof. The locking mechanism of the variable-track-gauge wheel set is arranged between a wheel hub and a wheel axle and used for locking wheels at different positions of the wheel axle to adjust the distance between the two wheels. A guiding structure for guiding the wheels to move axially is arranged on the wheel axle, and the locking mechanism adjusts the wheels to designated positions and then locks the wheels at the designated positions. On the premise that a variable track gauge is achieved, it is ensured that the wheel set has enough flexibility, reliability and accuracy.

The invention belongs to the technical field of bogie systems, and particularly relates to a variable gauge bogie. The variable gauge bogie comprises an axle assembly, a sliding key assembly and an axle box assembly. The axle assembly comprises an axle and a bearing and wheel integrated mounting seat. The sliding key assembly comprises a sliding part. The axle box assembly comprises an axle box and a bearing. The position from a wheel seat to the end part of the axle is provided with a moving pair connecting part. The bearing and wheel integrated mounting seat comprises a bearing mounting seat and a wheel mounting seat which are mutually connected and further comprises a moving pair junction part. The moving pair junction part and the moving pair connecting part form an axial moving pair. The sliding part is of a cylindrical body. The outer side wall of the cylindrical body is in axial slidable connection with the axle box. The inner side wall of the cylindrical body is in axial fixed connection with the bearing mounting seat through the bearing. The wheel axial direction of the variable gauge bogie is adjustable to be adapted to different gauges, railway transportation of ''Silk Road Economic Belt'' is developed, and the problem that railway gauges are not uniform must be solved, therefore, it is very important and far-reaching to carry out design of the variable gauge bogie.

An automated tribometer for measuring the coefficient of friction of the tread and gauge surfaces of railroad rail is disclosed. A tribometer is provided that is pushed in front of a high-rail vehicle, wherein during operation, the tribometer extends a rail test assembly to contact the surfaces of the rail. The rail test assembly has a rail testing wheel that is urged towards contact with the rail to be tested, and eventually contacts the rail, and lastly applies a known load to the rail. The testing wheel is then dynamically braked to slow the testing wheel to the point of creepage. The automated tribometer then can calculate the coefficient of friction of the rail.

A camera measuring method of long-straight track geometric parameter belongs to digital camera measuring and digital image disposing technique of railway contribution. It is: fix cooperate symbol on circuit detecting vehicle head moving on long-straight track, install camera before the vehicle. When vehicle moving along the track, at least two images at different time of the symbol moving as track waving and deflecting are shoot. Achieve geometric parameter (at least one of gage, cant, longitudinal deviation and versed sine) of the track by image processing. The invention efficiently meets high-speed railway requirements of high precision, reliability and automatic degree detecting, greatly improves geometric parameter level of track, which can be applied directly in geometric parameter detecting system of tamping vehicle and be as a core to design multiform track detecting vehicles.

The invention relates to the field of variable gauges for rail vehicles, and discloses a wheel set for a variable gauge bogie and the bogie. The wheel set comprises wheels, an axle and variable gaugemechanisms, and the variable gauge mechanism comprises a fixed sleeve, a locking pin, a mitigation sleeve and an unlocking disc. The wheels are slidably disposed at two ends of the axle, and the variable gauge mechanisms are respectively disposed on the inner side axle of the wheel, and by pushing the unlocking disc to drive the locking pin to move upwards, the fixed sleeve is unlocked with the mitigation sleeve. Therefore, the wheels are locked or unlocked conveniently, to achieve the variable gauge. The wheel set variable gauge process is convenient and reliable.

The invention discloses a bogie of narrow gauge railway vehicle, which comprises a wheel pair, a side frame, a vibration absorber, a swing bolster and a braking device. The wheel pair is connected with the side frame in a rolling way through a rolling bearing device; the side frame and the swing bolster form a bogie body structure through central mounting; a dual-acting elastic side bearer is laid in a swing bolster side bearer box; and the swing bolster side bearer box and the swing bolster are cast into a whole body. The invention optimizes structures of the wheel pair, a vehicle axle, the swing bolster and the side frame, and ensures that the wheel pair meets running requirements of narrow gauge (especially 1067mm gauge), and the structural strength of main bearing structures, such as the swing bolster and the side frame, meets bearing requirements of an 18t axle load bogie. The central mounting adopts a dual-stage variable stiffness spring, increases the empty natural bow, and meets different requirements on the central mounting in different operating conditions. By adopting the frictional vibration absorber of the control type bogie, the diamond resistant rigidity of the bogie is improved. By adopting the dual-acting elastic side bearer, stable turning drag torque is provided for the running of a vehicle, and the running speed of the vehicle is increased.

The invention discloses a track detector. The track detector comprises a machine frame, a gauge measuring device and a geometric parameter measuring device for an F-shaped track, wherein the machine frame consists of a horizontal beam, a vertical beam and a running device, and one end of the horizontal beam is connected with the vertical beam; the gauge measuring device comprises a first pressing device and a gauge measuring sensor, the first pressing device is connected with the other end of the horizontal beam through an elastic component, and the gauge measuring sensor is mounted at one end, connected with the elastic component, of the horizontal beam; the geometric parameter measuring device for the F-shaped track is arranged on the vertical beam and comprises second pressing devices, a data collecting sensor and one or more brackets allowing the data collecting sensor to be mounted, and during the operation, the first pressing device, the second pressing devices and the elastic component are matched to fasten the track detector on the F-shaped track. The main body of the machine frame consists of the horizontal beam and the vertical beam, so that the track detector is good in wholeness, not prone to vibrate, simple in structure and convenient to assemble, disassemble and carry.

A force measurement wheel set calibration test stand comprises a T-shaped stand base, portal systems and a transverse loading system. The force measurement wheel set calibration test stand is characterized in that perpendicular guide systems are installed on the portal systems and used for fixing a wheel set and achieving perpendicular loading; a bottom plate system is arranged at the position, below two portal top beams of the two portal systems, of the T-shaped stand base and used for adjusting track gauge, provides a platform for applying longitudinal force and transversely limiting the wheel set; a wheel set rotating indexing system is arranged at one end of the T-shaped stand base and used for achieving loading of any automatic rotating angle of the wheel set. According to the force measurement wheel set calibration test stand, perpendicular force and transverse force are independently loaded on the wheel set, and combined loading of loads in three directions can also be conducted on the wheel set; the force measurement wheel set calibration test stand has the wide track gauge calibration capacity, and meets the requirement for calibrating force measurement wheel sets of railway vehicles with the meter gauge, railway vehicles with the standard track gauge, railway vehicles with the wide gauge and other different railway vehicles; the force measurement wheel set calibration test stand has the capacity for adjusting lateral moving amount of wheel track contact points, and provides required perpendicular, transverse and longitudinal loads in a hydraulic loading mode.

The invention discloses a railway track gauge and horizontal parameter measuring method based on vehicle-mounted Lidar point cloud. The method includes the following steps that S1, a track model is established; S2, the track model and the vehicle-mounted Lidar track point cloud are initially matched; S3, the track model and the vehicle-mounted Lidar track point cloud are precisely matched, the distances from left and right working edges and an upper tread surface of the steel track model to the corresponding vehicle-mounted Lidar point cloud are calculated separately, and the gauge is adjustedaccording to the distances from the working edges of the steel track model to the vehicle-mounted Lidar point cloud; and S4, the step S3 is repeated iteratively until the distances from the working edges and the upper tread surface of the steel track model to the vehicle-mounted Lidar point cloud are smaller than a preset threshold value. The method realizes high-precision measurement of geometric parameters of a railway track, realizes matching of the track model considering the gauge and horizontal parameters with the vehicle-mounted Lidar track point cloud, and the gauge and the horizontalparameters of a railway track are measured based on the track model, so that technical support is provided for railway track measurement by using the vehicle-mounted Lidar technology.

The invention provides a track dynamic measuring system and method. The track dynamic measuring system comprises a longitudinal beam, a transverse beam, a total station instrument, a controller, an inertial navigation device, track gauge sensors and a mileage sensor. By using the track dynamic measuring system and method, the track measuring efficiency can be greatly enhanced on the premise of guaranteeing the absolute measuring accuracy of the track, can avoid problems that GNSS signals are missing in long and bid tunnels and the measuring accuracy does not satisfy the use requirement and can realize the balance between the track dynamic measuring accuracy and the track dynamic measuring efficiency.

The invention discloses a construction method of track gauge variation block slippage of a long span spatial composite roof truss, namely, the roof is divided into a plurality of slippage zones in the radial direction, the slippage zones are assembled on a hall hollow side and are mounted through a radial accumulation slippage method, and lastly the remained lifting zones are lifted and mounted through a combined installation method of slippage and lifting. The construction method of track gauge variation block slippage of the long span spatial composite roof truss can be applied to the construction of the long span spatial composite roof truss which weights more than 10000 tons, the problem that oversized profile steel pillars can not be lifted and mounted is solved, and the construction method can be widely used in the field of long-span construction of a steel structure and has wide popularization and application prospects.

The invention provides a method and device for determining the dynamic equivalent conicity of a railway vehicle, and relates to the technical field of railway vehicle routes. The method comprises the steps that tread data of each wheel in a wheel tread library and profile data of each steel rail in a steel rail profile library are classified and combined respectively, and various wheel-rail molded surface combined working conditions are formed; the change curve of the equivalent conicity corresponding to the wheel-rail molded surface combined working conditions along with the gauge is determined; the tread data of each wheel and the profile data of each steel rail are matched with the wheel-rail molded surface combined working conditions, and the wheel-rail molded surface combined working conditions corresponding to actual operation of the railway vehicle are determined; the actually measured gauge of a route is obtained, the dynamic equivalent conicity corresponding to the actually measured rail gauge on each mileage point is determined according to the change curve of the dynamic equivalent conicity along with the gauge, and the dynamic equivalent conicity of the railway vehicle on the whole route is formed.

The invention provides a rapid non-contact measuring method of railway intrusion boundary, and specifically relates to the method of automatically measuring the distance between objects such as a railway station and the like and a gauge center and the height of the objects relative to a rail surface based on a structured light three-dimensional visual detection technology. In the method, on the basis of a principle of structured light three-dimensional visual measurement, a linear-structured laser and a camera are employed, wherein, the linear-structured laser emits a laser line which is vertical to the rail surface, the camera acquires an image illuminated by the laser line, and a microprocessor calculates the distance between the objects such as the railway station and the like and the gauge center and the height of the objects relative to the rail surface according to spatial three-dimensional relation, thus realizing non-contact, high-speed and high-precision measurement.