52 results about "Working life" patented technology

The invention discloses a magnesium alloy electric drive main shell mold wear detection method and system based on machine vision, and belongs to the technical field of mold predictive maintenance. According to the method, three-dimensional point cloud, a surface texture image and an infrared thermogram of a mold are synchronously collected, and point cloud data fused with multi-modal information is generated through multi-sensor joint calibration and high-precision registration; geometric, texture and thermodynamic features are extracted and fused from the features, and a cross-modal feature vector is constructed; intelligent judgment of the wear level of the mold and accurate prediction of the remaining service life are achieved through the trained LightGBM ensemble classification model and the long-short-term memory network time sequence regression model; and finally, associating and visualizing the evaluation result and the three-dimensional model, and automatically generating a structured detection report. According to the method, comprehensive quantification, intelligent evaluation and accurate prediction of mold wear are realized, and the detection efficiency and the scientificity of maintenance decision are remarkably improved.

The utility model discloses a front and rear protection device of a rotating mechanism, which relates to the technical field of road snow removal equipment and comprises a rotating mechanism front protection cover and a rotating mechanism rear protection cover which are respectively arranged on the front side and the rear side of a side row rotating mechanism; the rotating mechanism front protective cover is fixed on the icebreaking machine frame body; the rotating mechanism rear protection cover is rotatably arranged on the icebreaking machine frame body, one end of the rotating mechanism rear protection cover is rotatably installed on the icebreaking machine frame body through a pivot shaft, and a shovel blade is fixed to the other end of the rotating mechanism rear protection cover; the lower side of the rotating mechanism rear protection cover is rotatably connected with one end of a hydraulic cylinder, and the other end of the hydraulic cylinder is rotatably connected with the icebreaking machine frame body. According to the utility model, foreign matters can be prevented from entering the high-speed rotating side-row rotating mechanism, the side-row rotating mechanism is prevented from being damaged, the maintenance cost is reduced, and the service life of equipment is prolonged.

The invention discloses an underground intubation type long-acting separation and production combination tool, and relates to the technical field of long-acting obstructors, the underground intubation type long-acting separation and production combination tool comprises a central tube, fixing blocks are fixed on the outer side of the upper end of the central tube at equal angles, the fixing blocks and a connector are mutually fixed, and the inner side of the connector is slidably connected with a sealing mechanism used for sealing a production tube. According to the underground intubation type long-acting separation and production combined tool, the cleaning mechanism is adopted, and axial gravity is converted into rotation torque through the spirally-distributed rollers, so that when the tool is put down, the cambered surface plate is tightly attached to the pipe wall under the thrust of the air bag; the friction force between the spiral rolling wheel (30-60-degree lead angle) and the pipe wall generates tangential component force enabling the whole rotating assembly (the circular ring, the cambered surface plate and the scraping plate) to rotate around the central pipe, the scraping plate rotates along with the tangential component force, attachments in the circumferential direction are scraped away, the process penetrates through the whole tripping-in stroke, the pre-treatment effect on the well wall of the sealing section is achieved, and the service life of the sealing section is prolonged. And the contact quality and the service life of the follow-up sealing rubber cylinder and the metal slip are obviously improved and prolonged.

The invention relates to a sealing lip inclined type bidirectional dynamic pressure oil seal which comprises an annular rubber body, an oil seal main lip and a dustproof lip are arranged in the middle of the oil seal of the annular rubber body, and an included angle alpha is formed between the oil seal main lip and the vertical plane of the axis center. Due to the fact that the sweeping bandwidth of the oil seal lip on the shaft is far larger than the contact bandwidth of the main lip, the lubricating condition of the sealing lip is greatly improved, friction heating at the position of the sealing lip is remarkably reduced, meanwhile, the heat dissipation area is increased, the temperature of the oil seal lip is reduced, and the service life of the oil seal lip is prolonged.

This utility model belongs to the field of electronic engineering measurement technology, specifically a test fixture for a small-power pulse transformer, including a transformer body; a connecting disc rotatably connected to the bottom inner side of the transformer body; a first gear rotatably connected to the top inner side of the transformer body; and a transmission gear ring rotatably connected to the top inner side of the transformer body; the transmission gear ring meshes with the first gear; and multiple sets of fan blades are arranged inside the transmission gear ring; during operation, the first gear is activated, causing it to rotate in the opposite direction. The first gear can interact with the elastic connecting plate through its teeth, thereby driving the connecting disc to rotate. The connecting disc can then be wound up with the fixture connecting wire fixed on its surface, thus reducing the risk of the existing fixture connecting wire being exposed to the outside for extended periods, leading to folding or damage. The overall device improves the working life of the fixture connecting wire and enhances the overall measurement efficiency.

A tubing assembly is provided that can comprise a plurality of tubes or lumens that can be disposed within a head of a peristaltic pump. The tubing assembly can provide a flow rate or volume capacity that is generally equal to or greater than that achieved with a comparable prior art tube while operating at higher pressures than that possible using the prior art tube. Further, in accordance with some embodiments, the tubing assembly can achieve a longer working life than a comparable prior art tube, and the load on the pump motor can be reduced such that the pump life is increased and / or a larger pump motor is not required to achieve such advantageous results.

This utility model relates to the field of medical device technology, and in particular to an artificial kidney dialysis solution preparation device, including a body assembly, the body assembly including a body body; two mounting slots are formed inside the body body; a synchronous drive assembly is provided at the bottom of the body body; and two permanent magnet rotors are provided at the output end of the synchronous drive assembly. This allows for the simultaneous and independent preparation of solution A and solution B, avoiding mixing and precipitation. Simultaneously, the stirring shaft inside the separate preparation tank is driven by a non-contact magnetic force transmission between the permanent magnet rotor and the permanent magnet ring, allowing the separate preparation tank to be removed from the mounting slot on the body body for easy cleaning and maintenance. Furthermore, the non-contact magnetic force transmission eliminates frictional losses associated with traditional gear or belt drives, extending equipment lifespan and reducing the risk of corrosive liquids eroding metal parts, significantly improving the working life of the preparation device.

The invention relates to the technical field of textile after-finishing, and discloses a production process of anti-static work clothes, which comprises the following steps: activating the surface of a base material fabric; padding the fabric by using a controlled release type functional finishing liquid prepared from a core functional monomer, boric acid as a dynamic protective agent and the like; and carrying out multi-stage temperature control baking on the padded fabric. According to the invention, the dynamic protective agent can temporarily close the active group of the core functional monomer and inhibit the self-condensation of the core functional monomer in the finishing liquid, so that the working life of the working liquid is prolonged; in the high-temperature baking stage, the protected active groups are dissociated and released, covalent bonding is carried out on the surfaces of the activated fibers, and a cross-linked network is formed on the surfaces of the fibers. The chemical bonding anti-static functional layer is constructed on the surface of the fiber, so that the work clothes have excellent washing resistance and stable product quality, and meanwhile, the finishing process is high in stability and suitable for industrial production.

The utility model discloses a contact switch, including circuit substrate, first fixed contact and first contact spring, be equipped with the power module of control machine opening and closing on circuit substrate, first fixed contact and first contact spring with power module electric connection, make first contact spring and first fixed contact can pass through power module control machine opening and closing, because first contact spring and first fixed contact simple structure personally, have not set up the shell body and wrapped first contact spring and first fixed contact, make first contact spring and first fixed contact even contaminate various dust or moisture, after machine work is completed, can very easily wipe dry and blow dry dust or moisture on first contact spring and first fixed contact, have the advantage that easy to clean, prolong the working life of machine. The utility model discloses still a kind of including the cleaning gun of above-mentioned contact switch.

The application relates to a method for prolonging the service life of a turbine disc, and relates to the technical field of a turbine disc of an aero-engine. The method comprises the following steps: heating a first region of the turbine disc and heating a second region of the turbine disc; obtaining a first real-time temperature of the first region and a second real-time temperature of the second region; if the first real-time temperature reaches a first temperature threshold corresponding to the first region, stopping heating the first region; if the second real-time temperature reaches a second temperature threshold corresponding to the second region, stopping heating the second region; wherein the first temperature threshold and the second temperature threshold are different. Different temperatures are used to heat different regions of the turbine disc, so that controllable elastic-plastic deformation of the turbine disc occurs, the crack tip is blunted, the damage tolerance is improved, the fatigue life at the center hole of the turbine disc is prolonged, and the service life of the turbine disc is significantly prolonged.

The invention provides a conveyor belt cleaning head and a conveyor belt cleaning device.The conveyor belt cleaning head comprises a scraper assembly which comprises an extension rod, a connecting shaft and at least one set of scrapers, the scrapers are arranged at the first end of the extension rod, and the connecting shaft is arranged at the second end of the extension rod; a mounting through hole is formed in the center shaft of the elastic plug block, and at least one extrusion cavity is further formed in the peripheral side of the mounting through hole; the connecting seat comprises a connecting cylinder and a connecting beam arranged on the outer surface of the connecting cylinder, and the elastic plug block is embedded in an inner cavity of the connecting cylinder; and the connecting shaft penetrates through the mounting through hole and is fixedly connected with the elastic plug block. According to the conveyor belt cleaning head, the elastic plug block with the lightening hole structure is adopted, the elastic plug block embedded in the connecting cylinder has a better elastic effect through the lightening hole, the elastic plug block is easier to elastically deform and reset, the damage probability of the scraper is reduced, and therefore the service life of the whole conveyor belt cleaning device is prolonged.

The invention belongs to the technical field of aircraft environment control, and discloses an efficient active rotational flow airborne water removal device which comprises a shell, a motor, a water collection cavity, a rotor impeller, stator blades and a main shaft, an axial cavity is formed in the shell, the main shaft driven by the motor is axially arranged in the cavity, and a device inlet is formed in the radial direction of the shell. A rotor impeller driven by the main shaft to rotate is arranged in the cavity corresponding to the device inlet, stator blades are arranged on the downstream of the rotor impeller, a water collecting cavity is arranged on the downstream of the stator blades, and the device outlet is formed in the radial direction of the shell at the rear end of the downstream of the water collecting cavity. By means of the structural design, the size and the weight of the water removal device are greatly reduced, the water removal device can be widely applied to an airborne air supply system, the centrifugal water removal mode and the spiral-flow type water removal mode are combined, the water removal efficiency can reach 99% or above, the water removal effect is stable, the water removal device is not affected by front-end air supply, the requirement for the moisture content of the air supply is met, and the service life of the air supply system is prolonged. And the comfort of passengers and the working life and reliability of airborne equipment can be greatly improved.

This invention relates to the field of robot health management and intelligent operation and maintenance technology, specifically a robot fault prediction system based on artificial intelligence algorithms. The system includes: a data acquisition module for collecting multi-dimensional sensor time-series data of the robot and constructing an N-dimensional time-series tensor from the collected data; a manifold mapping module for constructing a real-time updated health phase diagram; a risk assessment module for calculating the spatial distance between the current state point and a preset ideal health manifold, quantifying the physical degradation pressure of the equipment, and generating a probability distribution of the remaining effective working life; a decision generation module for acquiring external spare parts supply chain data and generating dynamic maintenance work orders; and a feedback closed-loop module for executing the dynamic maintenance work orders. This invention effectively solves the problem that traditional fixed threshold schemes are difficult to handle complex working conditions and nonlinear characteristics, significantly improving the sensitivity of fault precursor identification.

The utility model discloses an anti -freezing air conditioner heat pump unit, it includes: indoor shell, the inner wall fixed connection of indoor shell has condenser, compressor and throttle valve, the inner wall fixed connection of throttle valve has into steam pipe, the outer surface fixed connection of into steam pipe has evaporimeter, the inner wall fixed connection of evaporimeter has out steam pipe, the inner wall fixed connection of compressor has warm pipe, the inner wall fixed connection of condenser has out cold pipe, the outer surface fixed connection of evaporimeter has outdoor shell, the inner wall fixed connection of warm pipe has defrosting pipe, the inner wall fixed connection of indoor shell has defrosting pump, the inner wall rotatory joint of outdoor shell has several closed mechanisms, the outer surface fixed connection of evaporimeter has temperature sensor. Through above -mentioned structure, can prevent the medium in the mechanism to freeze due to temperature too low and evaporimeter to reduce the working efficiency due to frost, prolongs the working life of mechanism, improved the stability of working time.

The invention discloses an intelligent control method and system of a die-cutting machine, and relates to the technical field of intelligent control, a plurality of die-cutting contents are determined based on identification of die-cutting events, and a die-cutting optimization mode of a die-cutting node is determined according to the plurality of die-cutting contents, a real-time image of a die-cutting area and a node importance level of the die-cutting node. And the intelligent control system of the die-cutting machine is determined according to the die-cutting optimization mode of each die-cutting node, the working life of the die-cutting machine and the to-be-die-cut piece, so that the accuracy of the intelligent control system of the die-cutting machine is improved. Meanwhile, multiple optimization characteristics are determined according to detection of the dynamic optimization event, the working mode of the die-cutting machine is determined according to the multiple optimization characteristics, the working efficiency of the die-cutting machine and the corresponding die-cutting progress, and the die-cutting path of the die-cutting machine is dynamically regulated and controlled along with the form change of the part to be subjected to die-cutting; the overall consideration of a plurality of optimization characteristics, the working efficiency of the die-cutting machine and the corresponding die-cutting task is realized, and the accuracy of the working mode of the die-cutting machine is improved.

The application belongs to the field of aero-engine design, and is a gas turbine combustor outlet temperature real-time calculation method and system. By analyzing the oil-gas ratio calculation formula, the corresponding relationship between the combustor outlet temperature and the currently measurable parameters during the whole machine test is obtained, the combustor outlet temperature is realized in real time online evaluation, the inlet temperature change and component performance of the high-pressure turbine component can be evaluated in real time; by combining the application of the power turbine inlet exhaust gas temperature test measurement value and the combustor outlet temperature calculation value in the control system, the problem of the delay of the single use of the power turbine inlet exhaust gas temperature limit in the transition state process of the current various gas turbines can be solved, the delay time of the transition state process over-temperature control can be obviously shortened, thereby the working life of the hot end component is improved, and the problems of inaccurate grasp of the existing low-emission gas turbine combustion mode switching point, poor generality of the calculation method and poor effectiveness are solved.

The application discloses a kind of automatic pressurizing device for pump low-speed stage water-lubricated bearing in the field of hydraulic machinery, water-lubricated bearing is equipped on pump, and automatic pressurizing device injects water with set pressure to water-lubricated bearing, and automatic pressurizing device includes water inlet pipe, water tank and water outlet pipe connected in sequence;The water inlet pipe is connected to the outlet section of pump;Valve for controlling on-off is equipped on the water inlet pipe;The water outlet pipe is connected to water-lubricated bearing;Spring top cover and spring for blocking water inlet pipe are equipped in the water tank;The spring extrudes spring top cover, and spring top cover is on the outlet of water inlet pipe;The application adds water to pump water-lubricated bearing, which can effectively alleviate the vibration and noise caused by shaft eccentric rotation to water-lubricated bearing friction, and due to the lubrication and cooling effect of water, friction damage will also be weakened to a certain extent, the application has simple structure, small size, low cost, easy implementation, improves the working life of shaft and water-lubricated bearing.

The invention relates to the field of circulating pumps, and discloses a refrigerant pump which comprises a closed box and an auxiliary cylinder which are welded to each other, a flow slowing mechanism is arranged in the auxiliary cylinder and used for slowing down surge of a refrigerant, and a connecting mechanism located between the closed box and the auxiliary cylinder is arranged on one side of the flow slowing mechanism. And the other side of the connecting mechanism is connected with a pumping mechanism located in the closed box, the outer side of the pumping mechanism is provided with a processing mechanism located in the closed box, and the processing mechanism compresses gas in the box body and conducts flow guiding. Surge of liquid flowing and irregular mixed flow generated during gas-liquid mixing are reduced, the stability of whole liquid flowing is improved, gas explosion in a later-stage pipeline system is reduced, fluid can be driven to flow stably through combination of the two, impact on equipment and abrasion of other modes are reduced, the working noise of the whole system is reduced, and meanwhile the service life of the system is prolonged. And the stable working life of the whole system is prolonged.

Embodiments of the present disclosure provide a separation structure, a separation device and an image forming device. The separation structure comprises a base, a box movably arranged on the base, a separation module rotatably arranged on the box and having a plurality of working surfaces, a driving mechanism for driving the separation module to rotate, and a one-way clutch arranged on the separation module. When the box moves from a first position to a second position, the one-way clutch engages the driving mechanism with the separation module, so that the box drives the driving mechanism to drive the separation module to rotate, so that the working surface of the separation module is switched. When the box moves from the second position to the first position, the one-way clutch separates the driving mechanism from the separation module, so that the separation module maintains the switched working surface. By switching different working surfaces, the working life of the separation module can be effectively improved.

The application discloses a kind of based on data link's communication data's cleaning method, it is related to data processing technical field, the data quality characteristic of each data group is identified and obtained, data quality coefficient is generated, if it exceeds quality threshold, send cleaning instruction;From the cleaning priority value of data processing in each sub-region generated by data condition set, the cleaning priority value in each sub-region is sorted, and the sorting obtained is used as cleaning sequence;The cleaning feature of data in each sub-region is identified and obtained, and from the pre-constructed test cleaning scheme library, several corresponding candidate schemes are matched out, and the recommended scheme is selected from several candidate schemes;Several data quality coefficients are continuously obtained, the time consumption of data quality coefficient exceeding corresponding quality threshold is predicted, if it is shorter than expected, then send prompt instruction.The busy degree of each sub-region is formed evaluation, and the working state of each sub-region is adjusted according to the evaluation result, to prolong its working life.

The application discloses a vibrating diaphragm, an air guide loudspeaker and a wearable electronic device. The vibrating diaphragm comprises a center body and a folded ring. The folded ring is connected to the outer periphery of the center body. The folded ring comprises two arc-shaped sections and two connecting sections. The two arc-shaped sections are spaced apart and oppositely arranged. The two connecting sections are arranged side by side and spaced apart, and are connected to the two pairs of opposite ends of the two arc-shaped sections one by one. Each arc-shaped section is provided with a plurality of first pattern grooves which are spaced apart from each other along the extension direction of the arc-shaped section. The two ends of each first pattern groove extend in the direction of the inner ring and the outer ring of the folded ring respectively. The plurality of first pattern grooves are radially arranged along the same rotation direction. In this way, the working stability and the working life of the vibrating diaphragm can be effectively improved, and the working life of the wearable electronic device can be effectively improved.

The application provides a manufacturing method and structure of an IGBT device, which comprises the following steps: firstly, providing a substrate and forming an insulating layer on the surface of the substrate; then, etching the insulating layer and the substrate to form a plurality of contact hole grooves; then, forming a contact metal on the side and bottom of the contact hole groove and the surface of the insulating layer, and the contact metals in each contact hole groove are connected; then, forming a front metal layer on the surface of the contact metal; finally, etching the front metal layer to form a front metal layer pattern, and etching and removing part of the contact metal by taking the metal layer pattern as a mask. The contact metal of the application can have a larger contact area with the front metal layer, thereby reducing the contact resistance between the contact metal and the front metal layer, and further reducing the on-state voltage drop of the IGBT. The IGBT structure of the application has a thicker metal on the surface, which improves the heat capacity of the metal, thereby being beneficial to heat dissipation during the operation of the device, reducing the working junction temperature of the IGBT, and improving the working life of the IGBT.

The application relates to the technical field of automatic guided vehicles, and discloses a composite automatic guided vehicle and a vehicle control method.The composite automatic guided vehicle comprises a mechanical arm, a support frame, a support assembly and a vehicle body; the mechanical arm is arranged on the upper surface of the support frame; the support assembly is arranged between the lower surface of the support frame and the upper surface of the vehicle body, is configured to connect the support frame and the vehicle body, and adjusts the distance between the support frame and the vehicle body; the support frame comprises a plurality of support legs, the height of the support legs is greater than a first height and smaller than a second height; the first height is the sum of the height of the vehicle body and the minimum height of the support assembly, and the second height is the sum of the height of the vehicle body and the maximum height of the support assembly.The support legs provide support force when the mechanical arm is working, the support assembly only plays a role in pulling up the vehicle body, cannot bear vibration and eccentric load force, and can greatly improve the working life and reliability.

The application relates to the field of 3D printing technology, and provides a 3D printing extrusion mechanism and a 3D printer, which comprise a shell, both end inner walls of the shell near the top are fixedly provided with mounting side seats, both sides of the mounting side seats are fixedly provided with melting frames, the inside of the melting frames is provided with a heating assembly, one end of the top of the melting frame is fixedly provided with a feeding pipe, one end of the top of the shell is fixedly provided with a feeding pipe, and the inside of the feeding pipe and the inside of the feeding pipe are provided with wires. In the application, the whole 3D printer is provided with driving structures running synchronously when feeding and discharging, the extrusion mechanism of the whole 3D printer has better discharging effect, the 3D printing product can be effectively cooled and treated, the 3D printing product can be quickly formed, the forming rate of the whole printer is improved, the air circulation rate above the inside of the shell is accelerated, the inside of the shell above is effectively ventilated and cooled, and the working life is improved.

The application relates to the technical field of battery cooling, and particularly discloses an energy storage lithium battery device based on rapid heat dissipation and cooling, which comprises a machine body and lithium batteries, the inner surface of the machine body is fixedly connected with a bracket used for placing the lithium batteries, the lower end outer surface of the machine body is fixedly connected with a fixing sleeve, a through hole is formed in the lower end outer surface of the machine body, a moisture absorption assembly is arranged on the inner side of the fixing sleeve, and the moisture absorption assembly comprises a moisture absorption plate which is in sliding connection with the inner surface of the through hole. When air passes through the mesh holes on the surface of the moisture absorption plate, the air can be in full contact with the surface of the moisture absorption plate, the moisture in the air can be absorbed through the moisture absorption plate, so that the moisture entering the machine body can be effectively reduced, the probability of condensation in the machine body can be reduced, the risk of short circuit of the lithium batteries can be reduced, the probability of rusting of the metal connecting piece can be reduced to a certain extent, and the working life of the metal connecting piece can be effectively prolonged.

The utility model discloses a one two stage piston integrated compressor piston connecting rod mechanism, include: the conjoined piston, including the support plate and two pistons, and the opposite two ends of support plate are coaxially connected with piston respectively, and the piston is equipped with the leather bowl, and the middle part of support plate is equipped with two perforated holes, left connecting rod is pasted in one side of support plate, right connecting rod is pasted in the other side of support plate, and one end of right connecting rod is connected in one end of left connecting rod through the dowel, and the dowel is rotatably arranged in a perforated hole, and the other end of left connecting rod is formed with the boss, and the boss is movably arranged in another perforated hole and is connected in the other end of left connecting rod, and the boss is formed with the jack, and the drive shaft of the motor for transmission connection, and the eccentric shaft is eccentrically connected with the drive shaft, and the eccentric shaft is rotatably inserted in the jack. The utility model solves the problem that the traditional two stage compressor for the automobile air suspension cannot make linear motion with the same frequency, and the leather bowl on the piston is unevenly stressed, and the working life is low.

The invention discloses a permanent magnet semi-direct-drive slewing mechanism of a mining excavator and a control method of the permanent magnet semi-direct-drive slewing mechanism, and belongs to the technical field of engineering machinery. The permanent magnet semi-direct-drive slewing mechanism of the mining excavator comprises a slewing assembly, a brake hydraulic control assembly and a slewing lubricating assembly, the primary planetary reducer is fixed on the rotary platform, the permanent magnet synchronous motor is directly connected above the primary planetary reducer, and the hydraulic disc brake is fixed at the top of the permanent magnet synchronous motor. The permanent magnet synchronous motor is used for replacing an electro-magnetic asynchronous motor and forms direct connection and direct drive with the first-stage planetary reducer, and a traditional driving scheme is replaced; a split type hydraulic disc brake is adopted to replace an existing dry type disc brake, a working state early warning threshold value is updated in a manual supervision and automatic execution mode, then a case library of the slewing mechanism is continuously updated, self-learning evolution of the case library of the slewing mechanism is achieved, the working life of the slewing mechanism of the mining excavator is effectively prolonged, and the working efficiency of the slewing mechanism of the mining excavator is effectively improved.

The application provides a flow restrictor for a gas valve, which comprises an inlet pipe, an outlet pipe, a base and a flow-restricting cover. The base is connected with the flow-restricting cover, the inlet pipe is arranged on the flow-restricting cover, and the outlet pipe is arranged on the base. The inlet pipe and the outlet pipe correspond to each other and further comprise a plug rod, a top plate assembly, an external magnetic force assembly and a plurality of contraction assemblies. The flow restrictor for the gas valve is matched with the inlet pipe, the outlet pipe, the base, the flow-restricting cover, the plug rod, the top plate assembly, the external magnetic force assembly and the plurality of contraction assemblies. The flow restrictor can make the originally sealed spring in the plug rod rotate along the plug rod through the magnet, so that the originally damaged or abnormal-sounding spring enters the opening. In this way, the spring in the opening is not extruded and secondarily damaged when the flow-restricting plate works. The working life of the flow restrictor is effectively prolonged, the maintenance frequency is greatly reduced, and the personnel use is facilitated.

The invention belongs to the technical field of life prediction and reliability analysis of electromechanical equipment, and particularly relates to a method for predicting the working life of a mining electric shovel by adopting a large-torque load extrapolation model, and the method comprises the following steps: S1, carrying out the collection and preprocessing of load data; s2, constructing a kernel density estimation model; s3, constructing a large-torque directional expansion model and performing sample expansion; s4, extrapolating and compiling a load spectrum; s5, verifying an extrapolation result; the problems that in the prior art, when the torque of the motor of the electric shovel is extrapolated, due to the fact that large-torque data are missing in the software collection process, the number of large-torque samples is small, and the extrapolation precision is low in the extrapolation process are solved.

The utility model discloses a kind of switch life test equipment, knob life test device can be used to test the working life of knob, specific mode is the fixed part of knob is installed in fixed unit, the rotating part of knob is installed in driving unit, the rotating part of knob can be driven relative fixed part by the rotation of chuck of servo motor of driving unit, that is, knob is twisted, after the preset number of times of knob is repeatedly twisted, whether knob can still effectively work is observed or tested, so the working life of knob can be obtained. The rotating part of knob is clamped and fixed by three evenly distributed clamping claws, which can improve the clamping effect of the knob, prevent the knob from rotating offset relative to the chuck, and ensure the authenticity and reliability of the test results.