214 results about "Mechanical load" patented technology

The invention provides a special-shaped air film hole thermal mechanical fatigue simulation part design method, which comprises the following steps of: 1, analyzing the strength and the service life of a turbine blade, and identifying a key part of the service life of a special-shaped air film hole; 2, determining that the thermal mechanical fatigue simulation piece is of a hollow structure; 3, parameters of a clamping part of the hollow simulation piece are stipulated; 4, determining the mechanical stress of the key part through three-dimensional finite element simulation of the turbine blade; 5, verifying the included angle between the principal stress direction and the growth direction of the key part of the simulation part; step 6, measuring stress by using a strain gauge under a normal-temperature initial mechanical load, and verifying whether the load is compliant or not; 7, performing three-dimensional finite element simulation analysis on the temperature field of the test piece and calculating thermal stress; 8, controlling the thermal stress distribution of the section of the simulation piece by controlling the temperature distribution; step 9, when cooling gas is introduced into the inner cavity of the special-shaped gas film hole simulation piece, carrying out a thermal mechanical fatigue test by adopting an in-phase mechanical-temperature load; and step 10, optimizing the structure of the special-shaped gas film hole and analyzing the strength.

The invention discloses a high-speed rail vehicle body aluminum alloy material corrosion fatigue performance simulation method and system, and belongs to the technical field of material corrosion fatigue testing. The method comprises the following steps: acquiring multi-source data of a high-speed rail body aluminum alloy material on an actual service route; establishing a material corrosion conversion coefficient database; obtaining an equivalent mapping relation based on the service environment and the load input set; generating a laboratory equivalent accelerated environment spectrum; and executing the laboratory equivalent accelerated environment spectrum, obtaining material failure data, and if the comparison difference is not less than a preset threshold value, correcting the calculation parameters of the equivalent mapping relation and regenerating the spectrum system. Through synchronous acquisition and fusion analysis of the multi-source environmental data and the mechanical load and in combination with the corrosion conversion coefficient database construction and closed-loop verification optimization method, the problem of test result distortion caused by separation of a laboratory simulation environment and an actual service condition in the prior art is solved.

The invention relates to the technical field of industrial robot fault diagnosis, and discloses a fault early warning and remote diagnosis method for an industrial robot electrical control system, and the method comprises the steps: obtaining a mechanical load parameter through a potential load model, an inertia load model and a basic dynamics model, obtaining an electrical state parameter through an electrical efficiency model, and carrying out the fault early warning and remote diagnosis. A correction factor is generated through a correction model in combination with the environment temperature, a dynamic current threshold value is calculated through a threshold value model based on the correction factor and a basic current threshold value, and finally health scores and fault early warning information are output through a diagnosis model in combination with the vibration acceleration and servo ring following errors. According to the method, mechanical, electrical and environmental multi-source parameters are fused, dynamic threshold adjustment and multi-dimensional health assessment are realized, normal working conditions and abnormal states are effectively distinguished, the fault early warning accuracy is remarkably improved, the false alarm rate is reduced, and a reliable remote diagnosis scheme is provided for the industrial robot.

The invention discloses an operation control method for a wind power generation system, and relates to the technical field of operation control, and the method comprises the steps: obtaining the historical operation data of a wind power generation system in a target sea area, taking an offshore environment factor as an interference factor, and coupling the time-space parameters of ocean turbulence intensity, wave load and salt spray corrosion rate; establishing a fan-marine environment digital twinborn body; operation data is acquired in real time, synchronous mapping and dynamic updating of the digital twin are realized, and a state prediction model is established in combination with historical operation characteristics; taking the maximum power generation efficiency and the minimum mechanical load as a multi-objective optimization function, and introducing a model prediction controller to obtain an optimal control sequence of the wind power generation system in a future time domain of each control period; and selecting a first control instruction in the optimal control sequence, issuing the first control instruction to a physical fan torque controller and a variable pitch system in real time, realizing rolling optimization of the wind power generation system, and obtaining a self-adaptive operation control scheme of the wind power generation system. The power generation benefit of the whole life cycle is improved.

The invention relates to the technical field of variable frequency motor control, and discloses an energy consumption optimization regulation method for a variable frequency motor of a shot blasting machine, which comprises the following steps of: acquiring a real-time current signal of the motor, and converting an endogenous high-frequency ripple form into a discrete gear signal reflecting a mechanical load through a signal processing module; according to the invention, the dependence on an external load sensor is eliminated, the adjustment basis is completely established on the electromagnetic characteristics of the motor, the control precision is improved, and the control precision is improved. Not only is the failure risk caused by sensor faults avoided structurally, but also response delay of traditional feedback control is replaced by an instantaneous feedforward mode in control logic, and close following of energy consumption and load is achieved.

The invention provides a wind power blade fatigue damage early warning method and system based on modal energy excursion, and relates to the technical field of wind driven generators. According to the method, a multi-dimensional health baseline library is established under the healthy state of a wind power blade, and a current total strain signal and temperature distribution are synchronously collected in the operation process of a fan; performing temperature-strain decoupling on the total strain by using a healthy baseline library, and accurately extracting a real mechanical strain signal caused by the mechanical load; on the basis, a working condition modal recognition method is adopted to steadily obtain a current inherent frequency and a strain modal shape from real mechanical strain; calculating a current modal energy proportion and comparing the current modal energy proportion with the health baseline to generate an offset index reflecting a modal energy localization degree; and finally, in combination with the amplitude, the duration and the dynamic evolution trend of the offset index, and in combination with a fatigue accumulated damage assessment result, performing graded early warning judgment, and realizing early perception, accurate positioning and risk graded output of the fatigue damage of the blade.

The invention relates to the technical field of electromagnetic shielding rooms, and discloses a load-bearing framework and shielding panel integrated electromagnetic shielding room, which comprises a first structural shielding unit and a second structural shielding unit, the first structural shielding unit and the second structural shielding unit are alternately arranged, the first structural shielding unit comprises a first load-bearing framework, and the second structural shielding unit comprises a second load-bearing framework. The first structural shielding unit comprises a first load-bearing frame, the second structural shielding unit comprises a second load-bearing frame, the edges of the adjacent first load-bearing frame and second load-bearing frame are spliced through a multi-dimensional interlocking structure, so that an electromagnetic shielding room load-bearing framework is defined, and the splicing seam of the first load-bearing frame and the second load-bearing frame is provided with at least one zigzag electromagnetic wave attenuation path. The load-bearing frames and the electromagnetic shielding function are deeply integrated, the first load-bearing frame and the second load-bearing frame are mechanical load-bearing components, electromagnetic shielding is achieved through zigzag electromagnetic wave attenuation paths of the splicing seams and the magnetic conductive filling materials, an independent shielding framework does not need to be additionally arranged, and the overall structure is simplified.

The invention discloses a building material mechanical testing system based on multi-algorithm fusion, and belongs to the technical field of building material testing, and the system comprises an initial damage quantification module which is used for obtaining detection information of a tested material test piece before mechanical loading and generating a quantitative evaluation result; the loading and information acquisition module is used for applying a mechanical load to the tested material test piece with the generated quantitative evaluation result and acquiring a mechanical response signal and a microscopic state signal of the tested material test piece; the damage analysis module is used for calling a preset second data processing algorithm and analyzing and generating a dominant damage path; and the diagnosis and prediction module is used for integrating the associated data atlas and the dominant damage path information, generating a material performance diagnosis report and constructing a prediction model through a preset third data processing algorithm. According to the method, the initial damage of the tested material test piece is quantified, so that systematic deviation of a test result caused by neglecting the initial damage is corrected.

The invention discloses an energy-saving and consumption-reducing tunnel excavation method of a cantilever type heading machine under the action of gravity. The energy-saving and consumption-reducing tunnel excavation method comprises the following steps: step 1, drawing a geological form map; step 2, identifying an excavation contour line of the tunnel; step 3, constructing an initial free face; step 4, constructing a contour boundary groove; 5, drilling holes in the tunnel face at intervals, and sequentially stretching a rock stratum crushing device into each drill hole to perform fracturing operation; 6, the cutting head is controlled to conduct circuitous cutting in the trend of the rock stratum; in the excavation process, a rock stratum crushing device is used for moving along a cutting path; and step 7, trimming the contour boundary groove. According to the invention, the contact time of the cutting pick and the hard rock can be effectively reduced, and the abrasion of the cutting head is reduced; the rock is caved by utilizing gravity, so that the excavation efficiency is improved; the mechanical load is optimized, and the service life of equipment is prolonged; and meanwhile, the stress is released step by step, and the probability of sudden collapse risk is reduced. The method is suitable for the technical field of tunnel construction.

The invention discloses a method for predicting high-temperature and complex stress of a ceramic-based composite material based on strain control damage evolution, and belongs to the technical field of stress prediction of ceramic-based composite materials. The method comprises the following steps: determining material high-temperature performance degradation conditions according to temperature; the total strain (mechanical strain and thermal strain) of the material is calculated, and then based on a three-dimensional failure criterion of strain control, six damage initial criterion equations including stretching and compression in the warp direction, the weft direction and the out-of-plane direction are constructed; establishing an evolution model of damage coefficients by introducing a coupling mechanism of damage factors in different directions; combining a multi-linear constitutive relation of the ceramic matrix composite material to construct a rigidity degradation matrix, and realizing rigidity adjustment of the failure unit; and finally deducing a stress-strain relation equation to complete stress prediction of the material under the conditions of high temperature and complex load. The prediction method provided by the invention can accurately predict the complex stress state of the ceramic matrix composite material under the combined action of the high temperature and the mechanical load.

The utility model discloses a multi-layer corrosion-resistant stainless steel composite plate which comprises a base layer, a primary protection inner layer is arranged on the base layer, a middle layer is arranged on the primary protection inner layer, a secondary outer layer is covered outside the middle layer, and a coating layer is arranged on the secondary outer layer. The base layer is compounded with the primary protection inner layer through explosion, the secondary outer layer is compounded with the covering layer through explosion, and the primary protection inner layer and the secondary outer layer are compounded with the middle layer through hot rolling; the stainless steel composite plate formed by compositing five layers of base materials not only has a solid structural strength foundation, but also can bear larger mechanical load, and can adapt to a complex corrosive medium environment; the explosive cladding process provides strong interlayer bonding force, so that different material layers are tightly bonded, the layering phenomenon in the using process is prevented, the integrity and the performance stability of the composite board are guaranteed, and the hot rolling process further optimizes the interlayer bonding quality.

An insulator of the cap / pin type for an aerial electrical line comprises a dielectric element that has an outer surface in the form of a skirt that is extended by a metal cap on one side and a metal pin on the other side. It also comprises a mechanical load detection device comprising at least one strain gauge fastened to the metal cap of the insulator so as to be used to detect mechanical stresses representative of a mechanical load exerted on the electrical line.

The invention relates to the technical field of fatigue load reduction, in particular to a wind power plant torque and variable pitch cooperative control method with fatigue load reduction as the target. The method comprises the following steps: acquiring real-time and historical operation data of each fan in a wind power plant, and preprocessing the operation data; based on the preprocessed operation data, load characteristic indexes reflecting structural fatigue are extracted, and a load state vector reflecting the current fatigue accumulation trend of the draught fan is constructed; and based on the load state vector, establishing a coupling model of the influence of the generator torque and the variable pitch angle on the rotating speed response and the fatigue load, wherein the coupling model is used for reflecting the influence mechanism of torque adjustment on the low-frequency load and the inhibition effect of variable pitch adjustment on the high-frequency load. According to the method, the load state vector fusing the low-frequency mechanical load and the high-frequency pneumatic excitation is constructed, and the rain flow counting and equivalent damage theory is combined, so that the load component which has the greatest influence on the fatigue life of key parts such as a main shaft, a transmission chain, a tower and a blade root is accurately identified.

The invention discloses a titanium alloy deformation behavior testing device and method, and relates to the technical field of material deformation testing, the titanium alloy deformation behavior testing device comprises a universal testing machine, a clamping module, an ultrasonic vibration module, an electric pulse excitation module and a cooperative control module, the clamping module comprises a ceramic chuck main body, and a conductive contact is arranged on the clamping surface of the ceramic chuck main body; the ultrasonic vibration module comprises an ultrasonic vibrator, and the ultrasonic vibrator is arranged on one side of the ceramic chuck body and used for applying an ultrasonic vibration signal to the titanium alloy sample; the electric pulse excitation module is connected with the conductive contact and is used for applying an electric pulse signal to the titanium alloy sample; the cooperative control module is connected with the clamping module, the ultrasonic vibration module and the electric pulse excitation module. According to the invention, synchronous loading of mechanical load, electric pulse and ultrasonic vibration can be realized, and the clamping module solves the problems of electric conduction, vibration transmission and interference resistance, so that the deformation behavior of the titanium alloy in the electro-acoustic composite field can be accurately and reliably tested.

The invention relates to the technical field of fault prediction, in particular to a robot finger test method and system based on a robot, and the method comprises the following steps: synchronously collecting a phase current time sequence signal and an injected ultra-wideband pulse reflection signal at a servo motor drive output end of a robot finger, carrying out the alignment according to a collection timestamp, and carrying out the detection of the phase current time sequence signal; a pair of original timing electrical signals is generated. According to the invention, a phase current time sequence signal reflecting mechanical load characteristics and an ultra wide band pulse reflection signal actively detecting electrical link integrity are synchronously acquired at a driving output end of a servo motor, a multi-dimensional and information-complementary original electrical signal pair is constructed, and a phase current signal is processed to separate current ripples. And transmission harmonic energy distribution directly related to mechanical motions such as meshing of a reduction gear and rotation of a motor is extracted, so that non-intrusive quantitative evaluation of the health state of the internal transmission system of the robot finger is realized.

The invention provides a low-carbon high-conductivity aluminum alloy rod and a preparation method thereof, and aims to solve the technical problems that the conductivity of an aluminum alloy material which depends on a Cu element to improve the strength is suddenly reduced, and a pure aluminum wire cannot bear the mechanical load of large-span power transmission. The low-carbon and high-conductivity aluminum alloy rod comprises 0.5-0.8 wt% of Mg, 0.4-0.6 wt% of Si, less than or equal to 0.3 wt% of Cu, 0.05-0.15 wt% of mixed rare earth elements, 0.03-0.1 wt% of Sc, less than or equal to 0.1 wt% of Fe and Clt. 0.01 wt% of the total weight; the mixed rare earth elements are La and Ce, and the ratio of La to Ce is (2: 1)-(1: 2); and the balance of Al and inevitable impurities. The content of the Cu element is reduced, the damage of theta to the electric conductivity is reduced, rare earth is added and mixed, the impurity Fe is inhibited from forming an AlFe brittle phase, the grain boundary is purified, the electric conductivity is improved, Sc is added, an AlSc nano precipitated phase is formed, pinning dislocation and the grain boundary are formed, and the strength is improved.

The invention provides an aero-engine turbine interstage casing thermal-mechanical coupling loading test device, which comprises a mechanical loading test tool clamp, a temperature field control system and a test assembly, and is characterized in that the test assembly is used for simulating a turbine interstage casing assembly and is installed on the mechanical loading test tool clamp; the mechanical loading test tool clamp is used for composite loading of radial force and axial force of the test assembly. The temperature field control system comprises a cooling system and a heating system, and the cooling system and the heating system enable the test assembly to reach an expected target temperature field by controlling the temperature to adjust the current of the heater and the flow of cold air. The device has the advantages of being simple in structure, flexible to install, high in control precision, easy to operate and the like, and can be used for controlling the deformation discordance of the turbine interstage casing supporting plate and applying the mechanical load of the casing, so that an interstage casing outer ring stress-strain assessment point reaches the working state of an engine, and the working efficiency of the engine is improved. And checking whether the strength design of the inter-stage casing meets the expectation or not.

The invention relates to the technical field of electric cylinders, and provides a heavy-load electric cylinder actuating mechanism with bidirectional overload clutch protection, the heavy-load electric cylinder actuating mechanism with bidirectional overload clutch protection comprises an electric cylinder main body, and a motor is fixedly mounted on the surface of the electric cylinder main body. A threaded shaft rotatably penetrates through the inner wall of the electric cylinder body, and a material pushing shaft is slidably mounted on the inner wall of the electric cylinder body. According to the heavy-load electric cylinder executing mechanism with the bidirectional overload clutch protection, the clutch chuck II moves downwards to be disengaged from the clutch chuck I, at the moment, power transmission to the threaded shaft is cut off, and the material pushing shaft is slidably mounted on the inner wall of the electric cylinder body; clutch protection of the electric cylinder is achieved, breakage or deformation caused by over-torque and over-current is avoided, the service life of key components of equipment is prolonged, and the technical problem that in the prior art, in the operation process of the electric cylinder, due to the fact that the electric cylinder cannot bear high mechanical loads, negative influences on internal components of the electric cylinder to a certain degree are easily caused is solved.

A hardware (e.g., a process and / or circuitry) and / or software-based controller for septic system grinder or chopper units monitors load to the unit. As the unit encounters debris, electrical and mechanical load on the unit increases. In some cases, a signal to stop the unit from grinding / chopping (including but not limited to a signal based a waste-water level) is received while the unit is under the increased load. The controller may override the stop signal and continue sending power to the unit to clear the unit from debris causing increased load. The override may cease when it is determined that the debris has been cleared, such as when it is determined that the increased mechanical and / or electrical load on the unit has decreased or returned to a target load, allowing the unit to stop. The unit may include self-configuration functionality, determining thresholds for signaling override, target load, etc.

Method (3) for monitoring at least one component (4) of a motor vehicle (1), in which at least one detection value (12) of a detection quantity (14) is detected at several times (10, 11) within a time period by means of at least one sensor element (7) of the motor vehicle (1), which characterizes a mechanical load on the at least one component (4) of the motor vehicle (1), wherein it is determined by means of an electronic computing device (15) whether at least one value (16) of a comparison quantity (17) calculated from at least one of the detection values ​​(12) and / or assigned to at least one of the detection values ​​(12), which characterizes a mechanical stress (17a) of the component (4) accumulated over the time period, deviates from a reference value (19) by more than a predetermined amount (18), characterized in thatthat the respective measurement value (12) of the measurement quantity (14) detected by means of the sensor element (7) is assigned to one of a number of values ​​(16a, 16b, 16c) of the comparison quantity (17) and it is determined by means of the electronic computing device (15) whether the respective value (16a, 16b, 16c) of the comparison quantity (17) deviates from a respective reference value (19a, 19b, 19c) by more than the specified amount (18).

This utility model belongs to the field of bathroom technology, specifically relating to an explosion-proof overhead shower. The invention employs a double-ring gradient connection structure consisting of a main connecting ring and an auxiliary connecting ring. The main connecting ring comprises 2-8 spaced main connecting seats, providing high pre-tightening positioning. The auxiliary connecting ring, located outside the main connecting ring and composed of 12-30 spaced auxiliary connecting seats, is used to equalize circumferential stress. A positioning ring with an annular groove is provided on the inner side of the housing, cooperating with a positioning ring on the water outlet panel to achieve pre-positioning constraint during assembly. A pressure plate is sandwiched between the housing and the water outlet panel, with an integrally formed protrusion at the bottom of its pressure hole inserted into the positioning hole of the housing. The protrusion contains a water outlet hole with a diameter smaller than the pressure hole, forming an integrated throttling and pressure-stabilizing positioning unit. The main and auxiliary connecting parts are locked to their corresponding connecting holes by fasteners, achieving a rigid connection. This structure synergistically improves mechanical load-bearing capacity, assembly accuracy, and hydraulic buffering capacity, significantly enhancing explosion-proof reliability.

This invention relates to the field of variable frequency motor control technology, and discloses a method for optimizing and adjusting the energy consumption of a variable frequency motor in a shot blasting machine. The method includes: acquiring the real-time current signal of the motor; converting its inherent high-frequency ripple shape into a discrete gear signal reflecting the mechanical load through a signal processing module; filtering the discrete gear signal using a confirmation time window to suppress instantaneous impacts; and then matching and determining the target operating frequency in a lookup table based on the effective gear signal for feedforward adjustment. This invention eliminates the reliance on external load sensors, basing the adjustment entirely on the electromagnetic characteristics of the motor itself. This not only structurally avoids the risk of failure due to sensor malfunctions, but also replaces the response delay of traditional feedback control with an instantaneous feedforward approach in the control logic, achieving close tracking of energy consumption and load.

The application discloses a dangerous rock mass deterioration multifunctional test device and method, and through the setting of a self-weight stress loading frame and a detachable rock deterioration experiment cabin, deep coupling of mechanical load and environmental erosion is realized, technical defects of mutual disconnection of a stress field and an environmental field in traditional tests are solved from the root, the whole process of rock samples from deterioration evolution to final mechanical failure does not need to experience secondary transportation and repeated installation, a crack initiation and evolution mechanism under the guidance of a stress field is effectively restored, and therefore, the accuracy of experimental data in characterization of real damage laws of dangerous rock mass is remarkably improved.

The invention discloses a high-integration driving unit with an active variable geometric positioning parameter function. The high-integration driving unit is mainly composed of a wheel assembly, a suspension system, a first actuator and a second actuator. The actuator is arranged on the upper control arm, so that the mechanical load borne by the actuating mechanism during working is effectively reduced. The interior of the actuator is driven by a self-locking mechanism, continuous energy consumption is not needed when positioning parameters are maintained, and the steady-state power consumption of the system is remarkably reduced. In the aspect of mechanism connection, through combined arrangement of kinematic pairs, accurate matching of the degree of freedom of movement of the mechanism is achieved, the problems of interference and movement uncertainty in the adjusting process are effectively solved, and the accuracy of action execution is ensured. The unit integrates the functions of steering, active variable camber, active variable kingpin caster angle and fault tolerance. Dynamic real-time adjustment of geometric parameters is achieved through the compact structural layout, the vehicle control limit and stability are improved, and meanwhile the space utilization rate and work reliability are extremely high.

The utility model discloses a walking beam potential energy recovery energy-saving hydraulic system, and belongs to the technical field of hydraulic pressure. The system comprises a control system, a hydraulic pump, an oil cylinder, an energy accumulator set and a reversing valve set composed of seven reversing valves and proportional valves. The four working modes are switched through the control valve set. Small-flow driving is achieved through a differential loop during no-load rising. When the load rises, the energy accumulator releases pressure oil and supplies the pressure oil to the rodless cavity; when the load descends, oil in the rodless cavity is recycled to the energy accumulator to store potential energy; and oil flows back to the oil tank for circulating cooling during no-load descending. The gravitational potential energy recycling device can recycle gravitational potential energy in the descending process of a mechanical load, when load equipment needs to ascend again, hydraulic pressure of the energy accumulator is released and used for supporting ascending of the load, and the hydraulic energy is converted into the gravitational potential energy again. In the process of switching the system from no-load rising to load rising, pressure impact caused by switching of the reversing valve is limited on the valve group and is not transmitted to an oil cylinder and equipment.

The invention relates to the technical field of numerically-controlled machine tools, and particularly discloses an external mechanical skeleton production monitoring system based on a numerically-controlled machine tool, and the system comprises a data collection module which is used for collecting electrical parameters and mechanical parameters of the numerically-controlled machine tool in a one-time external mechanical skeleton production process according to a fixed time interval; a data calculation module is combined with electrical parameters of a numerical control machine tool in the one-time external mechanical skeleton production process, and main shaft rotating speed data in the mechanical parameters are cleaned and corrected based on the data, so that comprehensive analysis of electrical data of the machine tool can be introduced, and the influence of electrical data changes on a main shaft is eliminated; reliable and accurate data are provided for follow-up evaluation of the mechanical load risk, the reliability of the mechanical load risk evaluation result of the numerical control machine tool can be guaranteed, reliable data support can be provided for follow-up prediction of the future load risk of the numerical control machine tool, and therefore the accuracy of external mechanical skeleton production monitoring is guaranteed.

A test specimen (10), in particular for pressing into an object (12) to be tested, which is, for example, a covering system for buried steel pipes (14), has the shape of a truncated pyramid, truncated cone or a hemispherical layer with a base area (10g) and a top surface (10d), wherein - the projection of the top surface onto the base surface lies within the base surface; - the top surface is parallel to the base surface. A method for determining the mechanical strength of a casing system for buried steel pipes includes the following: - the test specimen is pressed from the outside against the encapsulation system with the top surface facing forward, according to a predetermined path and / or force profile; - the penetration depth of the test specimen into the encapsulation system is recorded; - the load-bearing capacity is determined depending on the measured penetration depth. A test rig (16) for determining the mechanical strength of a casing system for buried steel pipes comprises - a holding system (18); - a material testing machine (20) that can press the test specimen with the top surface forward against the encapsulation system; - a measuring device (22) that can detect the penetration depth of the test specimen into the encapsulation system; - a control device (24) which, according to the procedure, can control the material testing machine and the measuring device and determine the load-bearing capacity. The test specimen is used to determine the mechanical load-bearing capacity according to the procedure.

This application belongs to the field of wearable robot technology, specifically providing a mechanical load-bearing exoskeleton system based on ground reaction force self-triggering. The exoskeleton system includes an upper body mechanism, a thigh mechanism, a knee joint mechanism, a lower leg mechanism, and a foot mechanism. The knee joint mechanism includes a knee joint support, a locking component, and a transmission assembly. When the foot mechanism touches the ground and the sole of the foot is compressed and deformed by the ground reaction force, the thigh mechanism slides downward relative to the knee joint support. The transmission assembly drives the locking component to slide towards the thigh mechanism and connect with it, thereby locking the knee joint mechanism. The compression deformation of the sole of the foot caused by the ground reaction force is used as a trigger signal to automatically trigger the locking of the knee joint mechanism. The knee joint mechanism can lock at any reasonable angle, so that when the wearer is going up or down slopes, climbing stairs, or bending their knees for cover, the exoskeleton system can still effectively assist the human body in bearing the load by locking the knee joint mechanism.

This invention discloses a compressor and refrigeration equipment, relating to the field of compressor technology. The compressor includes a motor and a cylinder. The motor includes a stator core and windings, with the windings located on the stator core. The maximum outer diameter of the stator core is D1, and the axial length of the stator core along the compressor is L. The cylinder and stator core are distributed axially, with the axial height of the cylinder being H and the inner diameter being D2, satisfying: where U is the maximum voltage of the compressor in V, B is the gauge pressure of the compressor in MPa, and D1, L, D2, and H are in mm. The technical solution provided by this invention aims to match the magnetic load capacity of the stator core with the mechanical load of the compressor, avoiding material waste and ensuring the energy efficiency of the compressor.

The utility model discloses a mechanical load test device for a charging interface, which comprises a case with an inner cavity and a machine table connected to the side wall of the lower part of the case, a jig is rotatably arranged on the side wall of the upper part of the case, and a charging gun with a cable is mounted on the jig. A driving mechanism connected with the jig is arranged on the inner wall of the machine box, a lifting table is arranged on the top face of the machine table in a lifting mode, and a force application assembly and a clamping assembly connected to the upper portion of the force application assembly are placed on the lifting table. According to the utility model, the charging gun is installed through the clamp, a charging interface load test is carried out on the charging gun through the force application assembly after the cable of the charging gun is clamped by the clamping assembly, and the cable can be stably fixed by the clamping assembly, so that the cable is not easy to fall off, safety accidents are avoided, and the test efficiency is improved.