97 results about "Balance test" patented technology

The invention discloses a dynamic balance test de-weighting device, and relates to the technical field of dynamic balance test. The invention discloses dynamic balance test de-weighting equipment which comprises a machine base, a carrying mechanism which can ascend and descend and is arranged on the machine base in a mode of rotating around the axis direction of the carrying mechanism, and a driving mechanism used for driving the carrying mechanism to move, and a plurality of machining stations are arranged on the peripheral side of the carrying mechanism. A conveying mechanism, at least one testing mechanism and at least one weight removing mechanism are arranged on each machining station, and the carrying mechanism can sequentially pass through the machining stations in the movement process of the carrying mechanism. According to the dynamic balance test de-weight equipment, each mechanism on the dynamic balance test de-weight equipment can respectively bear the rotary body workpiece and test and de-weight the rotary body workpiece in the moving process of the carrying mechanism, so that the dynamic balance test de-weight efficiency is greatly improved; and meanwhile, all the mechanisms can be integrated into an integral structure through the carrying mechanism, so that the use cost is saved, and the occupied area of the equipment is reduced.

The invention relates to a motor rotor dynamic balance test adjusting device, and relates to the technical field of motor rotors, the motor rotor dynamic balance test adjusting device comprises an operation table, and the upper surface of the operation table is provided with a dynamic balance test assembly, a moving assembly, a turn-milling assembly and a clamping assembly. By designing the moving assembly, the turn-milling assembly and the clamping assembly and adopting a separated layout, the operation space is expanded, metal scraps can be prevented from splashing and accumulating in a narrow space in the turn-milling process to influence equipment operation, the detection precision is improved, brush rollers on the two sides of a linkage cutting opening rotate in the turn-milling process, and the detection precision is improved. According to the technical scheme, scraps are continuously prevented from splashing, the side face of the rotor is cleaned, meanwhile, the rotor can be rotated according to the position of an unbalance point, the turning and milling pressing assembly is matched to achieve turning and milling of any part of the outer side face of the rotor, the coverage area of the turning and milling unbalance point is greatly enlarged, the recheck qualification rate is increased, the recheck frequency is reduced, and then the dynamic balance testing efficiency is improved.

The invention relates to the technical field of dynamic balance testing, in particular to an inclined vibration balance testing system and method for a 4D platform seat, and the system comprises a vibration detection system, a bolt, an elastic ball, a fixing assembly, a fixing plate, an anti-falling assembly, and a sliding wire plate. The vibration detection system comprises a rack, a vibration controller and a vibration platform, and the vibration platform is provided with a segmented spiral groove and a working cavity; clamping grooves are formed in the bottom ends of the bolts; the elastic ball is placed at the bottom end of the working cavity, a fixing assembly is arranged above the elastic ball, a fixing plate is arranged on the fixing assembly, and the elastic ball drives the fixing plate to slide into the clamping groove to lock the bolt through the fixing assembly; a screw groove is formed in the fixing assembly, an anti-falling assembly is arranged above the fixing assembly, a thread sliding plate is arranged on the inner side of the circumference of the anti-falling assembly, an arc-shaped groove matched with the screw groove is formed in the thread sliding plate, and the fixing assembly drives the thread sliding plate to be separated from the screw groove through the anti-falling assembly. And the stability of the detection effect is ensured.

The invention relates to the technical field of dynamic balance testing of rotating machinery, and discloses a dynamic balance state testing system based on equipment operation data, which comprises a synchronous sampling module, a fundamental frequency vector analysis module and an influence coefficient self-adaptive calibration module, the synchronous sampling module collects key phase pulses and original vibration signals of the rotating equipment; a fundamental frequency vector analysis module extracts an instantaneous rotating speed and a real-time fundamental frequency vibration vector; the influence coefficient self-adaptive calibration module stores a weight matrix representing rotor supporting characteristics, monitors a rotating speed fluctuation variance, corrects the weight matrix according to complex deviation of a vibration vector when the variance exceeds a preset threshold value, solves a net unbalance vector of the controlled rotating equipment, and outputs the net unbalance vector. According to the method, the rotating speed micro fluctuation in the operation process is used as an excitation increment source, and the sensitivity model reflecting the rotor bearing characteristics is constructed, so that the dynamic balance test gets rid of the limitation of adding a physical test weight, and the online test requirement under the continuous working condition is met.

The invention belongs to the technical field of impeller detection, and provides an air floating type clamping tool and impeller dynamic balance testing device.The air floating type clamping tool comprises an outer fixing sleeve, a first air inlet connecting hole, a second air inlet connecting hole and a third air inlet connecting hole are formed in the outer fixing sleeve, and an inner mounting cylinder is fixedly mounted in the outer fixing sleeve; a wheel shaft sleeve is mounted in the inner mounting cylinder through an end cover and a locking pressing ring; an outer end face groove is formed in the side, away from the wheel shaft sleeve, of the end cover. The first air inlet connecting hole communicates with the outer end face groove through a first airflow channel. In a test state, the wheel shaft sleeve and the middle part of the wheel shaft of the impeller are encircled to form a middle cavity, and the second air inlet connecting hole is communicated with the middle cavity through a second airflow channel; a plurality of blowing holes are formed in the inner walls of the top and the bottom of the wheel shaft sleeve. The third air inlet connecting hole communicates with the blowing holes through a third airflow channel. According to the invention, the dynamic balance test precision of the impeller is higher, secondary damage possibly caused to the impeller in the test process is avoided, and the test efficiency of the impeller is greatly improved.

The application discloses a motor rotor dynamic balance test system and method, comprising: arranging an acceleration sensor and an encoder, collecting vibration, angular position signal and current signal; establishing a multi-resonance phase-locked loop, outputting a de-bouncing phase and an angular position sequence, forming a phase reference; angular domain resampling and sparse harmonic decomposition, extracting complex amplitude and generating observation and working condition data; complex value reversible flow model reverse mapping, combining constraint processing, outputting target counterweight instruction; target counterweight instruction injection virtual correction, calculating vibration decline rate, dynamically optimizing counterweight instruction; physical correction and recheck, archiving working condition label, counterweight instruction and recheck result after passing. The application realizes intelligent detection and correction of motor rotor dynamic balance by fusing multi-resonance phase-locked loop and complex value reversible flow model, and is free of test weight, high in precision and capable of multi-working condition.

The application discloses a positioning clamp for testing a generator set, belongs to the technical field of dynamic balance measurement testing, and is provided with a production conveying belt and a switching conveying belt. A dynamic balance testing structure is arranged below the switching conveying belt. The dynamic balance testing structure comprises a testing table. Opposite surfaces of the testing table are provided with vertical guide rails. Surfaces of the vertical guide rails are provided with horizontal plates. Positioning rotary shafts are arranged on both sides of the center of the upper surfaces of the horizontal plates. Clamping rods are fixedly connected to the surfaces of the positioning rotary shafts. The testing table is further provided with positioning plates. The positioning plates are rotated to drive the horizontal plates to move towards each other. The generator set positioning swing can be above the center of the testing table. Balance assemblies are arranged on the lower surfaces of the four corners of the testing table. The balance assemblies comprise bearing bodies. The bearing bodies are swung up and down to drive the pressure changes of positive pressure sensors and side pressure sensors. The dynamic balance of the four corners of the generator set can be tested at the same time. The continuity and stability of the dynamic balance testing work are improved. The dynamic balance testing effect is improved.

The utility model relates to the technical field of balance test fixtures, in particular to a gyrorotor dynamic balance test fixture which comprises a U-shaped base, fixing plates are arranged at the tops of two side arms of the base, a second screw hole is formed in the outer end of a boss, a sliding groove is formed in the inner end of the boss, an adjusting rod is arranged in the second screw hole, and a clamping seat is arranged at the inner end of the adjusting rod. A rotor is matched between the two clamping seats; according to the gyroscope rotor dynamic balance test clamp, the base with the fixing plate is arranged, external screws penetrate through the fixing holes to be combined and fixed with the corresponding dynamic balancing machine, the base can be conveniently and rapidly combined and fixed, the adjusting rod with the clamping seat is rotationally connected with the boss on the base, the clamping seat is provided with the shaft groove, and the shaft groove is clamped in the shaft groove. The device can be conveniently inserted and matched with a rotating shaft of a rotor needing to be tested, the two clamping seats realize distance adjustment matching under the rotation matching of the adjusting rod, the rotors with different widths can be stably clamped and matched, and the position of the adjusting rod is fixed through a positioning bolt under the action of friction force.

The utility model discloses a dynamic balance testing device, which belongs to the technical field of dynamic balance testing devices and comprises a base. The mounting seat is movably arranged on the top surface of the base; the two first clamping assemblies are movably arranged on the side, away from the base, of the mounting base correspondingly, and the first clamping assemblies are suitable for clamping the circular shaft; the driving assembly is connected with the two first clamping assemblies, and the driving assembly is suitable for driving the two first clamping assemblies to move towards or away from each other; the testing machine is arranged on the top surface of the base, and the mounting seat selectively moves towards or away from the testing machine. According to the dynamic balance testing device designed by the utility model, the position of the first clamping assembly is automatically adjusted, the clamping speed of the circular shaft is accelerated, the overall dynamic balance testing efficiency is improved, a synchronous control mechanism ensures that the two sides of the circular shaft are uniformly stressed, the measurement error caused by too tight or too loose single side is avoided, and the measurement accuracy is improved. Certainly, the situation that the two first clamping assemblies are independently adjusted can be avoided, and the clamping speed of the circular shaft is further increased.

The invention discloses a motor rotor dynamic balance test system and method, and the method comprises the steps: arranging an acceleration sensor and an encoder, and collecting vibration and angular position signals and current signals; establishing a multi-resonance phase-locked loop, outputting a de-jitter phase and an angular position sequence, and forming a phase reference; carrying out angular domain resampling and sparse harmonic decomposition, extracting a complex amplitude and generating observation and working condition data; performing reverse mapping on the complex value countercurrent model, and outputting a target counterweight instruction in combination with constraint processing; virtual correction is injected into the target counterweight instruction, the vibration drop rate is calculated, and the counterweight instruction is dynamically optimized; and performing physical correction and reinspection, and archiving a working condition label, a counterweight instruction and a reinspection result after qualification. According to the method, the multi-resonance phase-locked loop and the complex value countercurrent model are fused, so that test-weight-free, high-precision and multi-working-condition intelligent detection and correction of dynamic balance of the motor rotor are realized.

The application relates to an assembling method of a dynamic balance test tool and the dynamic balance test tool. The assembling method of the dynamic balance test tool comprises the following steps: processing initial raw materials to form a balance mandrel; the balance mandrel is gradually increased in outer diameter from one end to the other end, so that small-diameter ends and large-diameter ends are formed at the two ends of the balance mandrel; a part to be tested is provided, and the part to be tested is formed with a through hole; the small-diameter end of the balance mandrel is inserted into the through hole, the small-diameter end is in clearance fit with the through hole of the part to be tested, the balance mandrel is guided without resistance; an insertion force F is continuously applied in the axial direction, so that the surface of the balance mandrel is attached to part of the through hole, and the axial displacement of the balance mandrel is prevented; and the overall vibration amplitude of the balance mandrel and the part to be tested is detected to verify the stability of the assembly between the balance mandrel and the part to be tested and the absence of additional unbalance.

The utility model discloses a testing device for dynamic balance of a motor rotor, which relates to the technical field of dynamic balance testing devices and comprises a testing table, a mounting plate is fixedly mounted on one side of the surface of the testing table, an adjusting motor is mounted on the surface of the mounting plate and connected with a transmission device, and a fixing plate is fixedly mounted at the top of the testing table. An adjusting groove is formed in the side, away from the fixed plate, of the top of the testing table, the testing table is movably connected with a movable plate through the adjusting groove, a lifting mechanism is fixedly connected to the surface of the side, close to the fixed plate, of the movable plate, and a driving motor is installed at the top end of the lifting mechanism; the top of the fixed plate and the top of the movable plate are movably provided with adjustable supports, the tops of the adjustable supports are fixedly provided with supporting frames, and the problem that a traditional motor rotor dynamic balance testing device needs to adopt different testing methods and equipment to carry out dynamic balance testing on motor rotors of different specifications is solved.

The utility model provides a rapid clamping device for a dynamic balance test of a motor rotor, which comprises a host, a driving mechanism, a pair of V-shaped roller carriers and a pressing frame positioned above the pair of V-shaped roller carriers are arranged on the host, a transmission belt is arranged on the pressing frame, and the transmission belt performs transmission through the driving mechanism; a rotor is placed on the pair of V-shaped roller carriers, and a first shaft rod and a second shaft rod are arranged at the two ends of the rotor respectively; the device further comprises a clamping assembly. According to the utility model, through the arrangement of the clamping assembly, on one hand, the auxiliary wheel can support the longer first shaft rod, so that the rotation is more stable during the balance test, and on the other hand, when the auxiliary wheel supports the first shaft rod, the auxiliary wheel is pressed down by weight, so that the supporting rod at the bottom end of the fixed seat goes deep into the fixed block; therefore, the purpose of rapidly clamping the two ends of the rotor is achieved, an operator does not need to manually adjust the positions of the two abutting rods during taking and placing, and the working efficiency is greatly improved.

The invention discloses a dynamic balance test machine for motor production, and the machine is provided with a clamping part, the inner side of a connection spring fixedly connected to the inner side of a connection block is fixedly connected with an elastic clamping plate, and the bottom of an arc-shaped adjustment frame fixedly connected to the two sides of the connection block is slidably connected with a threaded block. The outer wall of a threaded rod in threaded connection with a threaded hole of the threaded block is fixedly connected with a rotating block, the threaded block is moved to drive a limiting spring fixedly connected to the inner side to move, an elastic clamping plate in contact connection with the inner side of the limiting spring is deformed by the compressed limiting spring, and a test piece is limited towards the inner side; the threaded block in threaded connection is locked and limited, and the deformed elastic clamping plate clamps and limits the test piece on the inner side, so that the test piece can be conveniently tested according to different specifications; when the test piece is tested, the baffle is pulled to move upwards, and the arranged baffle prevents the rotating test piece from being separated from the clamping component in the testing process to accidentally injure an operator.

The application relates to a dynamic balance adjusting device and an adjusting process, and relates to the technical field of dynamic balance testing. The device comprises a base, a mounting rack for placing one end of a rotor is arranged on the base, a driving mechanism for driving the rotor is arranged on the base, a sliding seat is arranged on the base, a clamp is arranged on the sliding seat, the clamp and the mounting rack are arranged on the two sides of the rotor, a sliding piece is arranged on the base, a sliding groove is formed in the sliding seat, the sliding piece is inserted into the sliding groove, the sliding seat moves on the sliding piece through the sliding groove and moves towards or away from the mounting rack, and a fixing structure for fixing the sliding seat is arranged on the sliding seat. The dynamic balance adjusting device has a wider application range, is more convenient to operate, and improves the convenience during dynamic balance detection of the rotor.

The present invention relates to the technical field of dynamic balancing machines. Disclosed is a weighing mechanism of a vertical dynamic balancing machine, comprising a base, a support frame, a horizontal locating plate, a mounting base, and support plates, wherein adjustment blocks are fixedly mounted on four edge sides of the mounting base; the horizontal locating plate is provided as a square-loop structure; the mounting base is located on the inner side of the horizontal locating plate, and the mounting base is not in contact with the horizontal locating plate; the four adjustment blocks are all located below the horizontal locating plate. The present invention achieves rapid measurement of the weight of a part to be measured to facilitate a weighting or de-weighting operation on a workpiece. When dynamic balance testing is continued after weighing has been completed, the mounting base can be jacked up and adjusted to a horizontal state by using jacking assemblies in conjunction with the adjustment blocks, so that a dynamic balance testing mechanism on the mounting base can be kept horizontal, thereby ensuring the precision of dynamic balance detection. Moreover, the adjustment blocks can be fixed by means of pressing rings and the horizontal locating plate, so that the mounting base is kept stable.

The utility model discloses a circular shaft clamping assembly and a clamping device for a dynamic balance test, and belongs to the technical field of dynamic balance test fixtures, the clamping assembly comprises a first support, and the first support is provided with a first accommodating groove which is open towards the top; the second support is rotatably arranged at the top of the first support, a second containing groove facing the first containing groove is formed in the second support, and the first containing groove and the second containing groove are jointly used for containing the circular shaft; the fixing mechanism is rotationally connected with the second support and provided with a fixing part and an adjusting part, the fixing part is suitable for abutting against the peripheral wall of the circular shaft, the adjusting part is suitable for connecting the fixing part with the fixing mechanism, and the adjusting part is suitable for moving towards or away from the second support when the circular shaft jumps. According to the clamping assembly designed by the utility model, the clamping assembly is prevented from being damaged or the surface of the circular shaft is prevented from being damaged when the circular shaft is in a dynamic balance test and jumps, and meanwhile, the clamping assembly can be ensured to stably clamp the circular shaft all the time.

The utility model discloses a dynamic balance testing device which is used for testing the dynamic balance of a flight power system, the flight power system comprises a propeller and a driving motor which are connected with each other, the surface of one blade of the propeller is provided with a reflective area, and the dynamic balance testing device comprises a supporting structure and a detection assembly. The supporting structure is provided with a first end and a second end which are oppositely arranged, the supporting structure is fixed at a preset height through the first end, the flight power system is fixed at the second end, the supporting structure has flexibility, and the second end of the supporting structure can swing when the flight power system simulates a flight state on the supporting structure; the detection assembly is arranged on the supporting structure and comprises a photoelectric sensor and a vibration sensor, the photoelectric sensor is used for emitting light signals to the light reflecting area to obtain rotating speed signals of the propeller, and the vibration sensor is used for detecting vibration signals of the supporting structure. The technical scheme of the utility model aims to improve the detection precision of the dynamic balance of the flight power system in the hovercar.

1. Name of the product in this design: Drive spindle. 2. Purpose of this design: This design is used to drive the workpiece to be tested to rotate in a balance testing machine. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The application discloses a rotor dynamic balance testing device with a self-clamping function, and relates to the technical field of rotor dynamic balance detection equipment. The rotor dynamic balance testing device comprises a supporting frame, a testing table is bolted to the upper end of the supporting frame, an automatic clamping loading frame mechanism is arranged at one corner of the upper end of the testing table, an automatic clamping testing frame mechanism is arranged at the upper end of the testing table, and a rotating plate is arranged above the testing table. A first cylinder is arranged at one side of the bottom end of the testing table, and a first motor is bolted to the side of the rotating plate. When the rotor dynamic balance testing device is used, the two ends of the rotor are penetrated into the inside of the clamping groove, and the clamping groove is matched with the pressing cover strip, the pressing cover block and the connecting seat, so that the pressing cover block performs pressing cover work on the two ends of the rotor, the stability of the rotor during detection is maintained, and the detection result is prevented from being affected by the shaking of the rotor during detection.

The application provides a dynamic balance testing device and a testing method thereof, and belongs to the technical field of dynamic balance testing, wherein the device comprises a spiral bevel gear assembly and a dynamic balance machine, and the spiral bevel gear assembly is clamped on the dynamic balance machine. The spiral bevel gear assembly of the application can improve the bearing capacity and cooling effect of the spiral bevel gear assembly of the main reducer, and meet the use requirements of an aero-engine. By arranging the ball bearing, the cylindrical roller bearing and the bearing seat, the radial bearing capacity of the ball bearing is low, the gap fit provides axial support for the gear shaft, the radial bearing capacity of the cylindrical roller bearing is high, and the axial bearing capacity is low. By arranging the two different bearings, the high radial bearing capacity and the high axial bearing capacity can be realized, the wear of the bearing is reduced, and the operation life of the bearing is improved.

The present invention discloses a dynamic balancing mandrel for dynamic balancing test of an impeller assembly and a manufacturing method thereof. The dynamic balancing mandrel is mainly assembled from a shaft body, a pulley and a cylindrical pin. The shaft body includes a micro-conical cylindrical surface that is in assembly contact with the impeller assembly, a shaft shoulder at the large end of the micro-conical cylindrical surface, and a cylindrical surface at the other end of the shaft shoulder; the pulley includes a second cylindrical hole, and the second cylindrical hole is assembled with an interference fit with the cylindrical surface on the shaft body. A cylindrical hole for dynamic balancing test mandrel is provided on the axial end face of the shaft body close to the pulley, and the depth of the cylindrical hole for dynamic balancing test mandrel is used to adjust the center of gravity of the dynamic balancing mandrel. The present invention adjusts the center of gravity of the dynamic balancing mandrel to within the mounting support surface of the impeller assembly without a locating key, and minimizes the distance between the center of gravity of the impeller assembly and the center of gravity of the dynamic balancing mandrel as much as possible to ensure that the dynamic balancing quality of the impeller assembly meets the design requirements.

The present invention discloses a motor rotor dynamic balancing test device, which relates to the field of motor rotor testing technology. The device comprises a base and a support mechanism fixed to the base. The support mechanism comprises two brackets. A transfer mechanism for transferring and loading the rotor is provided between the two brackets. The transfer mechanism comprises a rotating drum, a plurality of connecting rods, a plurality of groups of clamps for clamping the rotor, and a control component for driving a single group of clamps to open or close. Compared with the prior art, the present invention realizes the clamping and transfer of the rotating shaft through the cooperation of the control component and the clamp. The control component uses gas flow to control the opening and closing of the clamp, thereby reducing interference caused by the operation of the electronic equipment and improving the accuracy and stability of the test. At the same time, by controlling the flow and pressure of the gas, the opening and closing action of the clamp can be further adjusted, thereby meeting the requirements of different rotor dynamic balancing tests and improving the test efficiency and accuracy.

The invention discloses a cylindrical roller bearing dynamic balance test bench and a test method, and relates to the technical field of bearing dynamic balance test, the cylindrical roller bearing dynamic balance test bench comprises a test bench, a connection positioning assembly, a long shaft system, a vibration test assembly and a radial test assembly, a long shaft system is installed at the end, away from the transmission shaft, of the connection positioning assembly, and a vibration testing assembly and a radial testing assembly are arranged between the installation support and the second vertical plate. The long shaft system and the connection positioning assembly are matched with rotation of the motor to carry out dynamic balance testing, vibration signals and vibration amplitude of the cylindrical roller bearing are amplified through the long shaft system, and signal collection and data analysis are carried out on torsional vibration, axial vibration and radial vibration of the cylindrical roller bearing in the rotation process.

The utility model discloses a balance testing device, and relates to the technical field of balance testing. The balance testing device comprises a detection assembly and a rotation driving assembly, the detection assembly is provided with a detection position, and the rotation driving assembly comprises a rotation driving part movably arranged in the direction close to or away from the detection position and a first driving module used for driving the rotation driving part to move. According to the balance test device, the driving part on the balance test device can be far away from the detection position when the manipulator performs feeding and discharging actions, so that the driving part is prevented from interfering with the stroke of the manipulator, and the feeding and discharging efficiency of the rotary body is improved.

The application discloses a kind of single-end support motor rotor's balancing test device.Rotor is supported clamped on floating mechanism, and air cylinder assembly is installed on floating mechanism, and sensor is arranged on the side of floating mechanism.In floating mechanism, floating platform bottom plate is elastically supported and installed on spring sheet mounting plate through spring sheet, movable bearing mounting block is horizontally slidably installed on floating platform bottom plate, air cylinder assembly is installed on the side of floating platform bottom plate, air cylinder assembly is connected with movable bearing mounting block, sensor is installed on spring sheet mounting plate, the bottom surface of floating platform bottom plate is connected with sensor, first bearing piece is installed on floating platform bottom plate and movable bearing mounting block, and second bearing piece is also installed on floating platform bottom plate.The device of the application simplifies mechanical structure, and only one set of shaft end limiting bearing can play the role of rotor axial support, and movable bearing block driven by air cylinder is used to realize stable clamping, so that the measurement accuracy is improved, the measurement error is reduced, and the cost is saved.

The application relates to the technical field of vibration detection, in particular to a static balance inspection vibration detector for a concrete finishing machine compression roller, which comprises two groups of guide pieces, each of which is provided with two No. 2 roller wheels; an energy storage assembly is connected with the No. 2 roller wheels, a cylindrical spring is arranged in the energy storage assembly, and a pulley is arranged at the end of the energy storage assembly far from the No. 2 roller wheels; a traction assembly is connected with the energy storage assembly, and when the traction assembly drives the energy storage assembly to move towards the concrete finishing machine compression roller, the energy storage assembly can slide in the No. 2 inclined groove arranged on the guide piece; a pushing structure is connected with the energy storage assembly, the pushing structure cooperates with the pulley, can release one end of the cylindrical spring when the energy storage assembly moves towards the concrete finishing machine compression roller, can clamp the concrete finishing machine compression roller with different diameters, and prevents the swing of the concrete finishing machine compression roller when the clamping force is too large to inhibit the rotation of the concrete finishing machine compression roller.

The invention relates to the technical field of balance testing of structural components, in particular to a digitization-based bearing stability evaluation method for a spandrel girder structure, which specifically comprises the following steps of: constructing a virtual reality feedback model; performing internal micro-damage analysis caused by physical continuity attenuation, extracting an internal recessive stripping index obtained through the internal micro-damage analysis, and importing balancing fluctuation data of the bilaterally symmetrical support obtained by combining real-time weight measurement counterforce into oblique displacement offset plug evaluation analysis to perform bearing stability proofreading; evaluating the deterioration condition of the connection rigidity of the interface structure; and according to the oblique displacement offset plug index and the structural interface stability evaluation index, carrying out joint anomaly judgment to obtain a comprehensive collapse pre-estimation index and carrying out risk alarm. According to the method, the problem that in the prior art, before visible damage or remarkable deformation occurs to the bearing beam with the component stress specificity, an effective technical means capable of early warning sudden instability (such as oblique section shear damage) caused by internal damage accumulation of the bearing beam in advance is lacked is solved.

The invention relates to the technical field of tire balance test benches, in particular to a multi-working-condition tire balance test bench which comprises a supporting column and a first base, the supporting column is rotationally installed on the first base, and a tire is installed at the front end of the supporting column; the device further comprises a driving device, a pressure device, a collection sensor, a second base, a barrel and an air pump, the collection sensor is installed between the first base and the supporting column, the first base is installed on the driving device, and the driving device is used for providing power for rotation of the supporting column and driving the first base to move and adjust. The cylinder is rotationally mounted on the second base, the air pump is mounted on the outer side wall of the second base, and the power input end of the air pump is concentrically connected with the cylinder; a balance test is carried out on a tire under load rotation, the linkage effect that the larger the tire rotation load is, the larger the extrusion force on the tire is, the real effect of the balance test for simulating extrusion deformation of the tire under the actual load bearing working condition is improved, and the comprehensiveness of the tire multi-working-condition test is improved.

This invention discloses a laser marking device for impeller imbalance, relating to the field of rotor dynamic balancing technology. The invention aims to solve the problems of visual deviation and inaccurate positioning caused by human factors in existing impeller balancing tests that rely on manual visual marking of the center of gravity. The device includes a balancing test apparatus and a laser device independently of the impeller's rotation axis. The laser device includes a fixed base and a testing device, which slides laterally on a slide rail of the fixed base via pulleys. A multi-degree-of-freedom adjustment mechanism, including a clamping plate, grippers, a shaft, a connecting rod, and a pin, is mounted on the fixed platform of the testing device. The laser emitting device is installed at the end of the connecting rod. This invention achieves non-contact laser-based point marking, eliminating errors caused by manual visual marking, effectively improving the accuracy of impeller imbalance location marking, and enhancing the efficiency of impeller weight reduction and correction while improving equipment operational safety.