62results about "Machine part testing" patented technology

The invention relates to a screw drilling tool, a vertical drilling tool testing method and well inclination simulation testing equipment, and relate to the technical field of petroleum equipment. Thetesting equipment comprises a main bracket, a push-pull device and an angle measuring device, wherein the first end of a tested tool is suspended and pivoted to the main bracket, one end of the push-pull device is connected with the main bracket, the other end of the push-pull device is connected with the tested tool, and the push-pull device is used for pushing or pulling the tested tool to makethe tested tool incline; and the angle measuring device is connected with the tested tool and used for measuring the offset distance of the second end of the tested tool. The testing method includesthe following steps that the first end of the tested tools is suspended and pivoted to the main bracket; the second end of the tested tool is pushed or pulled to make the tested tool incline; the offset distance of the second end of the tested tool is measured; and according to the offset distance, the inclination angle of the tested tool is calculated. By means of the testing equipment and the testing method, the tested tool can incline at different angles, and the working condition that the tested tool deviates from the vertical plane due to inclination of a well wall is simulated.

The invention relates to a wireless monitoring system and method for a modal parameter of a blade of a fan. The method comprises the following steps of: A, collecting a vibration acceleration signal of a blade according to periods; B, processing the signal collected in the step A to obtain a digital signal; C, processing the digital signal obtained in the step B to obtain the modal parameter of the blade, and meanwhile, reading the air speed of the fan and variable pitch data; D, storing the data obtained in the step C, and transmitting the data to a remote analysis terminal; and E, carrying out analytical calculation on the data to obtain the inherent frequency and vibration mode of the blade. The system comprises a coordinator and more than one sensor fixedly arranged on the blade. By using the wireless monitoring system for the modal parameter of the blade of the fan, provided by the invention, the real-time modal parameter of the blade of the fan can be obtained through monitoring the vibration of the blade; the monitoring method and a mounting way are simple; no strain gauge is used, and correction on a result is not needed; and the test process is independent from the operation process of the fan, therefore, stopping of the fan is not needed.

The invention discloses an automobile hand brake fatigue test rack. The test rack is provided with a traction cable (18), a traction pulley (17), a traction poise (19), a hand brake operating cylinder (4) and a hand brake button cylinder (5), wherein a time relay and a travel switch are arranged in a control circuit of the automobile hand brake fatigue test rack; and the travel switch is a limit position travel switch of the hand brake operating cylinder (4). By using the technical scheme, the ascending process of the cylinder is controlled by the time relay and the travel switch together, and the ascending time of the cylinder is controlled by the time relay; a deflation device is adopted during loading of force on a ratchet and a tooth plate to guarantee that the load is fully loaded onthe ratchet and the tooth plate; the loading time is controlled by the time relay and can be flexibly adjusted according to a standard requirement; and the test rack has high universality and is suitable for generalization and application.

The invention discloses a fatigue test device for a torque arm assembly and belongs to the fatigue test technology for torque arm assemblies. The fatigue test device for the torque arm assembly is characterized in that two opposite semicircular holes are formed in one end of a shaft body of an artificial main shaft, the outer diameter of the shaft body of the artificial main shaft is matched with the inner diameter of a clamping ring, the two semicircular holes in the shaft body and two opposite semicircular holes in the clamping ring are aligned, and the other end of the artificial main shaft is fixed to a test stand rack; a first actuator is connected with a first force transducer and is connected with a first torque arm through a first loading connector, a second actuator is connected with a second force transducer and is connected with a second torque arm through a second loading connector, the first actuator and the second actuator are symmetrical about the artificial main shaft, a pair of loads which are opposite in direction are exerted on the first loading connector and the second loading connector respectively in the tangential directions of the torque arms, and the fixed end of the first actuator and the fixed end of the second actuator are fixed to the test stand rack. According to the fatigue test device for the torque arm assembly, the loading structure and the load characteristics can be simulated more truly, and results are more accurate and more credible. When the fatigue test device is used for testing, the overall testing error can be controlled below 3%.

The invention discloses a key-dialing switch testing device and a testing method thereof. The key-dialing switch testing device comprises a product fixing mechanism, a testing mechanism, a control system and a slide rail driving mechanism electrically connected with the control system; the testing mechanism is installed on the slide rail driving mechanism, the testing mechanism and the product fixing mechanism are opposite to each other; the testing mechanism comprises a bent fixing plate, a bent sliding plate, a first connector, a second connector and a dual-way pull-pressure sensor electrically connected with the control system. The key-dialing switch testing device and the testing method thereof replace the traditional manual detection mode, the switch sliding force and the switch travel of the key-dialing switch can be accurately detected, the detection is reliable, the manpower is saved, and the detection cost is low.

The invention provides a net cage model test platform which is characterized in that two platform main beams stretch across rails and move through towing of a trailer. A platform framework is formed by the platform main beams via longitudinal connecting rods and transverse connecting rods through connection. The middle of the platform frame is provided with connecting supports which are used for installing a volume measuring instrument. The four corners and the front part of the platform framework are provided with clamping plates which are used for installing photographing rods and towing rods. One side of the platform framework is provided with a lateral photographing operation rod. Waterproof cameras are adopted to act as cameras which are provided with LED lighting lamps and fixed at the bottom part of the photographing operation rod. The top part of each towing rod is provided with a tension sensor bracket which is used for placing a tension sensor, and the bottom part of each towing rod is provided with slide wheels which act as transmission devices of tension steel ropes of a model test. Multi-angle model images are transmitted to a display end by the photographing devices arranged at the four corners and the sides of the platform. Tension data are measured by the tension sensors and transmitted to the computer display end and the data are read in real time and saved. The whole platform structure is connected with the tail part of the trailer via a connecting device arranged at the front end.

The invention discloses a method for diagnosing a state of a rolling bearing based on a self-attention neural network, comprising the steps of: using a vibration acceleration sensor to acquire timingsequence signals of vibration acceleration of the rolling bearing in different states under different motor loads to obtain vibration acceleration data to be used as sample data; performing data enhancement processing on the acquired sample data; attaching corresponding labels to the sample data subjected to the data enhancement processing according to the type of the state of the rolling bearing;extending characteristic vectors of each sample data by using multilayer mapping, so as to change one-dimensional characteristics into multi-dimensional characteristics; establishing a self-attentionnetwork diagnosis model; training the self-attention network diagnosis model by using the processed sample data, evaluating the trained self-attention network diagnosis model, and applying the trained self-attention network diagnosis model to monitoring the to-be-diagnosed rolling bearing. According to the method of the invention, a data enhancement technology and a characteristic extension method are adopted, so that a requirement of the method on data volume can be reduced, and the capacity of the method for coping with an extreme environment is improved.

The invention discloses an energy dissipation property testing device of a bolting connection part, a testing method and a molding method; the testing device comprises a force tensile testing machine, an upper test piece, a lower test piece, a bolt, a strain gage, a bridge, a dynamic strain meter, a signal collecting system and a computer; the upper test piece is fixed with an upper clamp of the force tensile testing machine, and the lower test piece is fixed with a lower clamp of the force tensile testing machine; the upper test piece and the lower test piece are fixed through the bolt; the strain gage is placed in the bolt, and connected with the bridge; the bridge is connected with the signal collecting system through the dynamic strain meter; the force and displacement of the force tensile testing machine are sent to the signal collecting system through the force sensor and the displacement sensor respectively; the signal collecting system is connected with the computer and sends the testing data of the collected bolting combining part force, displacement and bolt pre-tightening force to the computer. The device is simple in structure, convenient to mount and dismount, and easy to repeat test, and solves the problem that the lagged non-linear property of the bolting combining part is hard to test.

The invention discloses an automatic circulation impact fatigue test device. The test device comprising a base, a clamping assembly, supporting plates vertically arranged on the base and located on the two sides of the clamping assembly, guide rods vertically arranged on the base and parallel to the supporting plates, lifting driving assemblies arranged at top ends of the supporting plates and used for driving the clamping assembly to ascend and descend along the supporting plates, an opening and closing assembly which is arranged on the guide rod in a sleeving mode and used for controlling opening and closing of the clamping assembly, and an impact assembly which is arranged on the guide rod in a sleeving mode and clamped by the clamping assembly, wherein the opening and closing assembly is located above the impact assembly, the impact assembly is slidably connected with the guide rod, and the clamping assembly is located between the opening and closing assembly and the impact assembly; a test placement assembly is arranged on the base, and the test placement assembly corresponds to the impact assembly. By arranging the lifting driving assembly, the clamping assembly, the opening and closing assembly, the impact assembly and the test placement assembly, circulation efficiency of the impact fatigue test device is improved, and meanwhile, accuracy of experimental data is improved.

The invention relates to the technical field of welding, and discloses a circular radial butt weld damage torque testing method which comprises the following steps: S1, determining actual welding parameters according to an actual transmission structure; S2, establishing a model; S3, respectively manufacturing a first sample piece and a second sample piece based on the model, and selecting a locking assembly; S4, assembling the first sample piece, the second sample piece and the locking assembly; S5, welding the to-be-welded weld joint through an actual welding process, and forming a test weldjoint; S6, manufacturing a clamp; and S7, clamping the test transmission structure to a torque testing machine and carrying out a damage torque test. The circular radial butt weld damage torque testing method is easy to operate and low in detection cost, the maximum bearing torque of the actual weld can be accurately evaluated, an actual transmission structure is prevented from being designed toostrongly, and therefore the manufacturing cost of the actual transmission structure is reduced.

The invention provides a bending resistant expandable type test platform system with an auxiliary support. The test platform system comprises a platform base, a height adjustment force-bearing frame,a cage-shaped main force-bearing frame, a lateral force-bearing column, a loading beam, a hydraulic cylinder, a screw rod, force-bearing ground rails, a ground force-bearing point and ground rail bolts. The test platform system in the invention makes full use of the bearing capacity of the force-bearing ground rails and the ground force-bearing point, expands the bearing capacity of a main platform formed by the platform base and the height adjustment force-bearing frame by designing the cage-shaped main force-bearing frame and adding the lateral force-bearing column as the auxiliary support,decomposes and transfers the root bending moment load to the auxiliary support and the main platform by using the end face and side of the cage-shaped main force-bearing frame, transfers the load simultaneously to the force-bearing ground rails and the ground force-bearing point so that the ground force-bearing point usually used for concentrated loading and bearing in a laboratory can also bear the test load, and enables the bending resistance of the test platform to be significantly improved without changing infrastructure conditions of fixing bearing members such as the force-bearing groundrails and the ground force-bearing point.

The invention discloses steam turbine generator unit fault visual diagnosis method and system. The method comprises the steps: acquiring operation parameters and vibration data of the steam turbine generator unit; obtaining a reference vibration vector of the steam turbine generator unit under all working conditions according to the operation parameters and the vibration data; acquiring a real-time vibration vector of the steam turbine generator unit under all working conditions; comparing the real-time vibration vector with a reference vibration vector to obtain a vibration vector differencevalue; and carrying out fault determination on the steam turbine generator unit according to the vibration vector difference value. By adopting the method or the system provided by the invention, faults can be judged in time, and the risk of serious accidents of the unit is reduced.

The invention discloses an AC motor bearing fault diagnosis method adopting a convolutional neural network and a bidirectional long-short term memory network. According to the method, the advantages of parameter sharing, local sensing, downsampling and the like of the convolutional neural network are fully utilized, corresponding spatial features are effectively extracted from original current data, and a complex feature extraction process is avoided. And then the extracted current data spatial features are input into a bidirectional long-short-term memory network, time sequence information of the current data spatial features is captured, and the rolling bearing fault diagnosis accuracy is further improved. According to the invention, the stator current obtained in the motor driving process is used as a fault signal, a non-intrusive fusion system which is easy to form a closed-loop'driving-diagnosis' is provided, and the monitoring cost can be effectively reduced; the bearing fault diagnosis method combines the characteristics of the convolutional neural network and the bidirectional long and short time memory neural network, has good performance in depth and complexity of feature extraction, and can realize accurate and effective extraction of fault features.

The damage length measurement system has an object being measured that comprises a plurality of members is vibrated by an oscillator, and the vibration that propagates through the object being measured is detected by three sensors. A measurement apparatus analyzes that vibration wave, and measures the arrival time of the maximum peak. Using the fact that the time for a wave to propagate between two vibration detection sensors separated by a set interval is fixed, the measurement apparatus determines whether the difference in arrival time between two sensors is within a set reference range that includes the vibration propagation time between two vibration sensors. When the measurement apparatus determines that the difference is not within the set reference range, uses the fact that that wave is delayed compared to the wave that was to be detected.

The invention discloses a vibration detection device. The vibration detection device comprises a grabbing limit unit and a detection unit. The grabbing limit unit is formed by a substrate and a floating clamping jaw mechanism. The detection unit is formed by a base bench, a vibration sensor and an electrification element. The electrification element is connected with a to-be-detected motor in a powering manner. The vibration sensor is abutted to the to-be-detected motor. After the vibration detection device is used, the beneficial effects are that the vibration sensor can be easily moved and adjusted to cling to the to-be-detected motor in a convenient and quick manner; the vibration sensor is provided with a damping body; the floating clamping jaw is provided with an elastic piece which can eliminate effects on an electric motor imposed by an environment system, so precision of vibration detection can be increased; and the electrification element is provided with horizontal linear displacement towards the to-be-detected motor and is of a detachable type structure, and according to different specifications of electric motors, the electrification element can be replaced and positions of the electrification element can be adjusted, so switching can be quickly finished, detection efficiency is high and application range is wide.

The invention relates to a low temperature liquefaction vehicle fuel tanker operation box pipeline equipment plugging simulation test bench. The bench includes a pipeline, a first shut-off valve, a second shut-off valve, a shut-off valve-pipe elbow connection plugging device and a shut-off valve stem plugging device, the first shut-off valve and the second shut-off valve are installed in the pipeline, an elbow connection structure is formed between the first shut-off valve and the pipeline, the pipeline is connected with a liquid nitrogen bottle, the shut-off valve-pipe elbow connection plugging device is installed at the elbow connection of the first shut-off valve and the pipeline, and the shut-off valve stem plugging device is mounted on a valve stem of the second shut-off valve. The bench can conduct simulating experiment on the leakage plugging of the internal shut-off valve of a liquefied natural gas tank car operation box, a pipe elbow joint and the shut-off valve stem, and achieve the purpose of verifying the plugging effect.

The invention provides a swirler test fixture, which comprises a fixture flange (1), a pull rod (2) and a press block, wherein a first position of the fixture flange (1) along the edge is used for assembling a swirler (7); the pull rod (2) is pivoted to a second position of the fixture flange (1) along the edge; the second position is opposite to the first position; and the press block is arranged on the pull rod in a sliding way, and is operably pressed against a pressure stabilizing cylinder flange (51) of a pressure stabilizing cylinder (5). When the test fixture is used for testing the swirler, tools such as a spanner, a bolt and the like are not required to be used for fastening the fixture flange and the pressure stabilizing cylinder flange together, the pull rod is required to be rotated only, and an adjusting block is used for clamping the fixture flange and the pressure stabilizing cylinder flange. The operation is safe, time-saving and labor-saving; and the work efficiency is greatly improved.

The invention discloses a limit load reliability test device for a miniature ball screw pair. The device comprises a driving device which is used for driving a ball screw pair to be tested to move reciprocally, a loading device which is used for applying an axial load to the ball screw pair to be tested, measurement assemblies which are used for detecting the performance parameters of the ball screw pair to be tested, a supporting guiding assembly which is used for supporting the driving device, the loading device and the measurement assemblies, and a control module which is used for controlling the rotating speed of the driving device and the axial loading force of the loading device. The ball screw pair to be tested, the driving device, the loading device and the measurement assemblies are all arranged on the supporting guiding assembly; one end of the ball screw pair to be tested is connected with the driving device; the other end of the ball screw pair to be tested is connected with the loading device; and the measurement assemblies are arranged between the ball screw pair to be tested and the driving device as well as between the ball screw pair to be tested and the loading device. The device is simple in structure and convenient to operate, can acquire reliability test data quickly and accurately so as to evaluate the reliability of the ball screw pair to be tested more optimally.

The invention provides an abnormal data detection method and device and a mechanical fault detection method and device, and belongs to the technical field of data processing. The abnormal data detection method comprises the steps of obtaining first training data; constructing a filter, and determining a coefficient of the filter by using the first training data; enabling the first training data topass through a filter to obtain second training data; constructing an anomaly detection model, training the anomaly detection model by using the second training data until the recognition effect of the anomaly detection model reaches the expectation, the input of the anomaly detection model being the second training data, wherein the output of the anomaly detection model is the difference featurevalue between the second training data and the reconstruction data, and the reconstructed data is obtained by reconstructing the second training data by the anomaly detection model; and inputting theto-be-detected data into the filter, and then inputting the to-be-detected data into the anomaly detection model to obtain abnormal data in the to-be-detected data. The method can improve the detection precision of abnormal data.

The invention discloses a conversion device for a high temperature modal test and a vibration test method. The conversion device comprises at least one conversion portion. The conversion portion comprises a metal rod, a connection rod and a sensor, wherein the metal rod is vertically arranged with an axial direction of a test piece which is about to carry out vibration testing and the test piece passes through the metal rod; the connection rod is connected with a lower end of the metal rod and an axis of the connection rod is arranged oppositely to the axis of the metal rod; and the sensor used for testing a vibration signal of the test piece is connected to the lower end of the connection rod.

The invention relates to the electromechanical field and particularly relates to a tractor chassis two-machine loading running-in test stand. The test stand includes a base, a traction input mechanism, an input lifting adjusting mechanism, a test piece mounting mechanism and a loading mechanism which are mounted on the base, and further includes a real-time data detection and processing system anda PLC automatic control system, wherein the mechanisms and the system are connected with a tractor chassis test piece. The tractor chassis two-machine loading running-in test stand is advantaged functions of synchronous running-in, real-time detection and cleaning purification are achieved, the hidden fault risk is eliminated, the integral quality of a tractor is improved, the energy source is saved, production efficiency is improved, and online loading running-in, real-time detection, cleaning purification and PLC automatic control are achieved.

The invention discloses a bearing fault identification method based on combination of VMD and multi-fractal. The bearing fault identification method comprises the following steps: acquiring a rolling bearing fault signal; carrying out denoising preprocessing on the signal, wherein a VMD method is adopted to carry out preprocessing on the fault signal; performing feature extraction on the pre-processed signal, performing feature extraction on the pre-processed fault signal by adopting a fractal dimension method mainly based on a multi-fractal de-trending fluctuation analysis method, and performing effective identification on a nonlinear signal from the aspects of spectrum analysis, waveform analysis and instantaneous information features; and selecting a proper classifier to simulate the fault signal to obtain the accuracy. The fault signal characteristic frequency can be clearly obtained, so that the fault type is diagnosed, the traditional mechanical fault diagnosis technology is improved, and the diagnosis precision is improved.

The invention discloses a fixing device for automobile rubber and plastic part production detection, which comprises a mounting base, an electric lifting support, an electric turntable, a cylinder and a fixing platform, wherein the mounting base is internally provided with a battery pack; the electric lifting support is arranged above the mounting base through a mounting seat; the upper end of the electric lifting support is provided with the electric turntable through a bolt; the edge of one side above the fixing platform is provided with a first mounting plate; one side of the first mounting plate is provided with the cylinder through a long-neck bolt; one side of a first fixing ring is provided with a first fixing plate; one side of a second mounting plate is provided with a second fixing ring through a mounting part; and one side of the second fixing ring is provided with a second fixing plate. Through mounting a series of structures, the fixing device can facilitate detection during the automobile part production detection.

The invention discloses a self-operated temperature control valve detection device and detection method. The self-operated temperature control valve detection device comprises a test barrel, a steam branch which is arranged on the external side of the test barrel and connected with the test barrel, a thermometer which is arranged above the test barrel with the measuring end inserted into the testbarrel, and a blow-down valve which is installed on the bottom part of the test barrel. The steam branch comprises a steam piping valve, a first steam pipeline and a second steam pipeline. The steam piping valve is arranged on the steam inlet end of the first steam pipeline. The steam outlet end of the second steam pipeline is connected with the test barrel. The detected self-operated temperaturecontrol valve is connected between the steam outlet end of the first steam pipeline and the steam inlet end of the second steam pipeline, and the temperature sensor of the self-operated temperature control valve is arranged in the test barrel. According to the self-operated temperature control valve detection device and detection method, whole course control before and after use of the self-operated temperature control valve can be realized, and fault elimination and sensitivity test of multiple self-operated temperature control valves can be simultaneously performed.

The invention discloses a fingertip tactile performance test experimental device. A touch assembly is mounted in a through slot in the middle of the top of a rack. A test piece is disposed under the touch assembly and is fixed to a front-back moving module. The front-back moving module is installed on a left-right moving module. The left-right moving module is installed on a vertical moving module. The vertical moving module, the left-right moving module and the front-back moving module constitute a three-degree-of-freedom motion platform to realize fine motion. A plurality of contact cylindrical rods on the touch assembly are in contact with the upper surface of the test piece, motion with the test piece in three dimensions so as to present the outline of the upper surface of the test piece in a lattice shape. A fingertip recognizes the shape of the lattice by sensing contact stimulation (contact height, lattice density, and contact height fall) through tactile sense. The fingertip tactile performance test experimental device can satisfy two interaction modes including finger active touch and finger passive feeling, provides fine contact stimulation, and can be used for test experiments of fingertip tactile performance.