11 results about "Load deflection" patented technology

The invention provides a bridge model loading detection test device, and relates to the technical field of bridge test devices.The bridge model loading detection test device comprises a supporting frame, a static system simulation mechanism, a loading mechanism and a deflection detector, the supporting frame is provided with at least one pair of force measuring mechanisms, and each force measuring mechanism comprises a cylindrical ring and a dynamometer vertically fixed in the cylindrical ring; a support for supporting the end part of the model beam is arranged on the cylindrical ring; the cylindrical ring is arranged in a rolling manner along the axial direction of the model beam; the static system simulation mechanism comprises a horizontal moving part; the loading mechanism is used for abutting against different positions of the model beam to apply loads. The deflection detector is positioned below the mounting area; according to the invention, model beams of different static systems can be simulated, and loading and deflection change and stress change measurement can be carried out on the model beams of different static systems, so that more sufficient test data can be provided.

The application provides a sandwich combination structure lower hanging steel beam coordinate precision control method, and belongs to the technical field of wind tunnel construction. The application establishes an independent reference control network, sets a forced closed control point to block error linear transmission, calculates the lower hanging steel beam camber, and offsets the dead load deflection through reverse prefabricated bending processing. A buried part rigid positioning frame is installed and the position deviation is monitored. A hydraulic synchronous jacking device is used to iteratively adjust the posture of the steel beam. Pre-stressed tension is applied to realize reverse arch shaping. Finally, the least squares adjustment technology and the minimum spanning tree optimization algorithm are used to reasonably distribute the section cumulative error between the forced closed control points, thereby solving the technical problem of excessive steel beam coordinate precision caused by large-span multi-section construction cumulative error.

A foot switch device includes: a housing, a pedal moveably mounted on the housing, a bias element, and a switching device, wherein the pedal is configured to be moveable against a force of the bias element to operate the switching device, and wherein the bias element has a non-linear load deflection curve.

The present invention provides a static load deflection inclination test device for a wind turbine blade and a test method thereof, relating to the technical field of wind turbine blade testing. It includes a base, on which a support frame is fixed. A rotating frame is rotatably fitted inside the support frame. A mounting seat is rotatably fitted on one side of the rotating frame. A wind turbine blade is installed on one side of the rotating frame, corresponding to the mounting seat. A support and limit structure is installed on the base. A first motor is installed on the support frame, corresponding to the rotating frame. A driving structure is installed on the rotating frame. The present invention is applicable to relatively long wind turbine blades, preventing the small space below the wind turbine blade from affecting the wind turbine blade, enabling the device to test wind turbine blades of most sizes, thereby expanding the application range of the device. And it can drive the wind turbine blade to vibrate by the reciprocating movement of the rotating frame, so as to conduct vibration testing and expand the vibration range of the device, so that the device can not only be applied to static load testing, improving the practicability of the device.

The invention belongs to the technical field of structural component static balance testing, and particularly relates to a wind power blade static load deflection measuring device and method based on the satellite precision positioning technology, and the measuring device comprises a positioning module, a static force applying mechanism, a miniature strain gauge, a computer end and a communication radio station. The positioning module comprises a multi-band circular polarization positioning antenna, an adaptation layer assembly, a resolving module, a communication assembly and a power supply assembly, and the static force applying mechanism is provided with a traction force control module and a tension sensor. The detection method comprises the steps of dynamic adaptation layer initialization, static force loading and two-case data acquisition, two-case data preprocessing, two-case algorithm resolving, dynamic feedback tuning and result integration and output. And in combination with cooperative work of the base station and the mobile station, accurate measurement of the deflection of the wind power blade under the static load condition is realized, and the displacement calculation precision and the test automation level are effectively improved.

The invention relates to the technical field of laser cutting, in particular to a high-precision pipe cutting machine which comprises a plurality of bases and a plurality of follow-up supporting assemblies, each follow-up supporting assembly comprises a lifting assembly, a supporting platform, a supporting unit and a clamping unit, and the supporting platform is arranged at the driving end of the lifting assembly; a supporting roller of the supporting unit is rotatably arranged on a supporting platform, the clamping unit comprises two clamping rollers and a clamping adjusting assembly, the two clamping rollers are rotatably arranged on the clamping adjusting assembly, and the clamping adjusting assembly is used for driving the two clamping rollers to be close to or away from each other. The supporting roller and the two clamping rollers jointly form a three-point supporting structure so as to allow the pipe to rotate in the circumferential direction and move in the axial direction. The lower supporting roller and the clamping rollers on the two sides jointly position the pipe, self-weight deflection is effectively counteracted, it is ensured that the pipe is always kept in the preset axis in the cutting process, cutting errors are reduced, and scratching is avoided due to rolling contact between the rollers and the pipe.

This invention relates to the technical field of testing devices, specifically disclosing a wind turbine blade static load deflection and tilt testing device and its usage method. The device includes a moving component, a receiving component, a clamping component, and a detection component. The clamping component is located below the receiving component, which is also below the moving component. The detection component is fixedly connected to the lower end of the moving component and located above the receiving component. The wind turbine blade is located inside the clamping component. The detection component includes a support platform, a rotating cylinder, a connecting rod, a drive rod, and a laser collimator. A cylinder support frame is rotatably mounted at the middle position of the rotating cylinder, and the right side of the cylinder support frame is fixedly connected to the left side of the support platform. A rotating connector is rotatably mounted at one end of the rotating cylinder, and the rotating connector is fixedly sleeved at the middle position of the connecting rod. This invention can automatically calibrate and test the detection component, automatically adjusting it to a suitable angle and position, and can clamp wind turbine blades of various types and sizes.

Using a bending test with enhanced measurement accuracy, this experimental study involved testing partially sheathed composite steel beams with and without prestressing and without openings on the vertical plate. The bending strength and behavior patterns were also analyzed. The new technique for these composite beams proved to be an effective bending system. The steel-constructed structure significantly increased the bending capacity of the sheathed beam, while the prestressing of the cables was dependent on the steel's stress ratio. An infinite-scale analysis was conducted to study the behavior up to failure of a partially supported and partially covered composite beam subjected to a constant symmetrical load. Three-dimensional models were then analyzed using finite-element software to assess the beam's behavior under load deflection and failure conditions. The methodology employed was nonlinear gear and nonlinear geometric analysis based on repeated load incrementing. Twelve models were analyzed using this method to verify their potential and effectiveness. The results obtained using finite element models and failure methods were compared with experimental results. Good correlations were found between finite element analysis and experimental results.

A torsional vibration control coupling having a rotation axis includes a first coupling part as the input side of the coupling, a second coupling part as the output side of the coupling and a damping unit. The damping unit has at least one spring arrangement that is designed as a nonlinear spring arrangement having a degressive load deflection curve.

The present invention provides a simply supported to continuous track beam bridge and a support design method and a construction method, which are applied to the technical field of simply supported to continuous track beam bridge design and construction. The bridge includes track beams, bridge piers, permanent supports for continuous piers, post-cast wet joints and upper prestressed short beam assemblies. Adjacent track beams are connected by post-cast wet joints, and the post-cast wet joints are strengthened to be connected to the track beams by upper prestressed short beam assemblies. The support design method solves the friction coefficient of the support to ensure that the track beams do not slide under traction braking force. The construction method is a method for erecting track beams and setting post-cast wet joints, upper prestressed short beam assemblies, and lower edge prestressed short beam assemblies. The present invention effectively reduces the beam end rotation angle and live load deflection, ensures that the butt end maintains prestress and is not prone to cracking, realizes a smooth transition between the two spans of track beams, avoids the phenomenon of vehicle jumping at this location, and has better mechanical properties, durability, construction convenience and economic and social benefits.

The utility model discloses a crane load deflection detecting and early warning device which comprises a fixed box, a driving motor is fixedly installed on the top of the outer surface of the fixed box, a worm is fixedly installed at the output end of the driving motor, and the bottom of the worm is movably connected to the bottom of an inner cavity of the fixed box through a bearing. Through the arrangement of the contact plate, the fixed seat, the first spring, the U-shaped moving rod, the magnetic block, the magnetic control switch and the audible and visual alarm, when the deflection angle of the steel rope is too large in the loading process of the crane, an alarm prompt can be given to surrounding workers, so that the workers can timely discover and carry out corresponding safety treatment; through the arrangement of the horizontal sensor, the driving motor, the worm, the worm gear, the rotating shaft, the fixing box, the fixing plate, the transverse shaft, the fixing ring, the fixing seat, the U-shaped moving rod and the contact plate, personnel can conveniently and effectively adjust the contact plate horizontally in the angle adjusting process of the crane jib.