979results about How to "Avoid loss" patented technology

The invention relates to the technical field of power systems, and discloses a photovoltaic equipment fault diagnosis method, system and equipment and a medium. The method comprises the steps of obtaining a structured multi-mode fault data set based on a disclosed photovoltaic data set and collected multi-source heterogeneous data generated in the operation process of photovoltaic equipment; selecting an initial multi-modal large language model, and constructing a feature-oriented dynamic routing architecture according to a pre-training weight matrix of the initial multi-modal large language model; based on the structured multi-modal fault data set, utilizing a pre-constructed joint training loss function to carry out fine tuning training on the initial multi-modal large language model to obtain a target multi-modal large language model; and inputting the real-time operation data of the photovoltaic equipment into the target multi-mode large language model for reasoning to obtain a fault diagnosis result of the photovoltaic equipment. According to the invention, efficient and accurate diagnosis of the photovoltaic equipment fault is realized.

The invention provides an NoC low-delay data transmission method based on a dynamic routing algorithm, relates to the technical field of data transmission, and aims to solve the technical problems that an existing NoC routing algorithm cannot adapt to a link dynamic load, is lack of congestion trend prejudgment, is slow in path search convergence and is insufficient in QoS differential scheduling. The method comprises the following steps: constructing a dynamic sensing module containing a double-branch LSTM time sequence prediction model, collecting states such as link bandwidth and queue length in real time, and predicting a congestion trend in 50-100ms in the future; constructing a multi-objective evaluation function taking delay as a core, and dynamically adjusting the weight according to the QoS level; solving an optimal path by adopting an improved ant colony algorithm which introduces a congestion penalty and pruning strategy; during transmission, dynamic reselection is triggered through a pre-calculation + fast matching mechanism; and iteratively optimizing the prediction model based on incremental learning. According to the method, congestion is avoided in advance, the path search efficiency and the transmission reliability are improved, the delay is remarkably reduced compared with a traditional algorithm, and the method is adaptive to delay sensitive scenes such as a high-performance processor and an AI chip.

The invention discloses an airborne equipment acceleration monitoring and outrange control method and system, which cover acceleration monitoring of the whole flight process, combine dynamic scene modeling and a hierarchical response mechanism, and can timely identify an abnormal state and start corresponding measures. Through system calibration, noise identification, dynamic filtering, mistaken touch prevention parameter setting and a collision algorithm, false alarm and missing alarm caused by vibration, impact or sensor faults are effectively avoided, double modes of automatic collision detection alarm and manual triggering alarm are supported, the flexibility and safety of the system are improved, and once it is confirmed that the system is in distress, the system is safe and reliable. Rescue signals including position, time, height and other key information can be automatically sent, and the emergency response time is remarkably shortened.

The invention relates to the technical field of cross-border data secure transmission, and particularly discloses a semantic analysis-based cross-border data secure transmission method, which comprises the following steps of: dividing a sender credit investigation level through a multi-source credit investigation acquisition and semantic analysis model; the method comprises the following steps: preprocessing to-be-transmitted multi-modal data, and classifying the data through semantic alignment; matching transmission authority according to credit investigation levels and data types, separating transmittable data according to core / non-core data, and performing hierarchical encryption according to sensitive types of the data; data are transmitted through a cross-border private line of a TLS1.3 protocol, a sliding window and a retransmission mechanism are combined, and the integrity is verified by adopting a Hash algorithm. According to the invention, compliance dynamic adaptation is realized, protection precision and reliability are improved, and safety and efficiency are balanced.

The invention belongs to the field of aerospace sensors, and discloses an intelligent wide-range pressure measurement system and method for an aero-engine. The system comprises a pressure acquisition module which comprises at least two pressure sensors with different measuring ranges and overlapped measuring intervals, and an electromagnetic valve group used for switching gas circuits of the pressure sensors; the intelligent control module communicates with an engine FADEC to obtain real-time working condition parameters, predicts the pressure change trend in combination with a pre-stored pneumatic model, switches gas circuits in advance before the pressure reaches a range critical point, triggers a special collection mode to lock an adaptive sensor under a transient working condition, and collects data at the highest sampling rate. The measurement method comprises the steps of working condition parameter acquisition, pressure trend prediction, advanced range switching and self-diagnosis calibration, and through multi-sensor data comparison under environment pressure or stable working conditions, temperature drift errors are dynamically compensated, and faults of the sensors and transmission pipelines are accurately diagnosed. According to the scheme, the problems of switching delay, data distortion, sensor precision drift and difficulty in fault discovery of a traditional system are effectively solved, high precision and stability of full-range pressure measurement are guaranteed, and reliable support is provided for precise regulation and control and flight safety of an aero-engine.

The invention provides a wave position dynamic transfer method, system and device based on inter-satellite linkage and a medium, and the method is executed by an overload satellite and comprises the steps: judging whether a self load is overloaded or not; if the load is judged to be overloaded, selecting a to-be-transferred wave position from self-managed wave positions; acquiring state information of the adjacent satellites through inter-satellite interaction with the adjacent satellites; based on the obtained state information, determining a target satellite capable of bearing a to-be-transferred wave position from adjacent satellites having coverage overlapping with the target satellite; negotiating with the target satellite through an inter-satellite link to confirm beam position transfer, and triggering the target satellite to adjust the beam to cover the to-be-transferred beam position; and after negotiation confirmation, controlling the user equipment in the to-be-transferred wave position to be switched to the target satellite, and releasing the wave position resources. By adopting the method, the communication delay of the user equipment can be reduced, the throughput of the user equipment and the constellation resource utilization rate can be improved, and the service quality and user experience of a satellite communication system can be comprehensively optimized.

The utility model discloses an environmental light shielding mechanism relates to environmental light shielding technical field, monochromatic box one side is fixed with fixed pipe, fixed pipe communicates with monochromatic box, light -shielding cover, the light -shielding cover is located fixed pipe away from monochromatic box one end, be equipped with the limiting mechanism of being able to with fixed pipe and light -shielding cover each other fixed between the light -shielding cover and fixed pipe, connecting mechanism, the connecting mechanism is located fixed pipe both sides, is used for connecting light -shielding cover and fixed pipe, through the convex block rotation round plate, and the L -shaped block is rotated and is inserted into the inside of slot in arc -shaped groove with round plate, and this is fixed to light -shielding cover and fixed pipe, simple and practical, avoid the abrasion of the long -term use of thread and cause the light -shielding cover to be unable normal switch, and through the setting sliding plate and rotating lever simultaneously make the light -shielding cover rotatable accomodate to fixed pipe bottom, avoid the light -shielding cover to be placed in other places and lead to loss.

This disclosure relates to a control method, apparatus, electronic device, and storage medium for a device. When the electronic device is running, the method acquires the input current signal of the PFC circuit within the electronic device. When the input current signal is greater than or equal to a first preset current threshold and less than a preset current protection value, the method acquires signal parameters corresponding to the input current signal. These signal parameters include a first duration or a first count. Based on these signal parameters, the method controls the electronic device. This disclosure controls the operation or shutdown of the electronic device using the signal parameters corresponding to the input current signal, avoiding the damage caused to the electronic device by directly shutting down when the input current signal reaches the preset current protection value, extending the device's lifespan, and improving the user experience.

This invention belongs to the field of integrated circuit design technology, specifically relating to a method for optimizing integrated circuit design data. This method first constructs a "tool-layer-semantic" data acquisition architecture, integrating multi-channel parallel acquisition units to collect heterogeneous data from multiple sources. Compliance pre-verification is performed through hardware logic circuits and a verification rule base, extracting key data identifiers. A three-level incremental compression strategy based on key data priority, combined with an intelligent index integrating multi-dimensional indexes, is used for compression and storage. The stored data undergoes multi-dimensional optimization, including semantic deduplication, priority optimization, format conversion, and source quality backtracking, forming a unified format optimized semantic. Through an interactive interface, it is adapted and interacted with electronic design automation tools. After consistency verification and performance testing feedback loops, the final design data and full-process traceability information are obtained and stored. This invention achieves unified management, efficient compression, intelligent optimization, and full-process traceability of design data.

The application relates to the technical field of fault monitoring of wind turbines, in particular to a doubly-fed wind turbine fault monitoring method and system based on frequency monitoring, which comprises the following steps: acquiring operation parameter data of a doubly-fed wind turbine, generating a similar working condition time period of a gearbox in the doubly-fed wind turbine according to the operation parameter data based on a clustering algorithm; extracting target vibration data; generating modal components and central frequencies corresponding to each modal component according to the target vibration data, and generating modal component energy; generating a fusion modal energy value according to the modal component energy, and generating a unit fault early warning result. According to the application, only vibration data corresponding to the similar working condition time period is extracted, so that the interference of signal differences under different working conditions on vibration characteristics is excluded, a comprehensive criterion for unit faults based on the fusion modal energy value is used, the gearbox fault risk is early warned as accurately as possible, and false negatives are reduced.

The application discloses a method, device and system for realizing data synchronization. Since the synchronization task notifies the identification information of the synchronization task itself when notifying a remote cluster to delete the log record corresponding to a point, the subsequent deletion of the source cluster can be performed on the log record corresponding to the minimum point. In this way, the loss of the synchronized data is avoided, the common storage for saving the point information applied by different synchronization tasks does not need to be introduced and maintained, the complexity of the system is reduced, and the maintenance cost is greatly reduced.

This utility model relates to a cross-arranged hybrid metastructure sound barrier structure, comprising a perforated panel (1), a metastructure module (2), and an assembly base (3) arranged sequentially. The perforated panel (1) includes a cross-arranged large-aperture panel (11) and a small-aperture panel (12). The metastructure module (2) includes a cross-arranged metastructure cotton module (21) and a low-frequency module (22). The assembly base (3) includes a cross-arranged metastructure cotton fixing base (31) and a low-frequency module fixing base (32). Compared with the prior art, this utility model uses lightweight composite acoustic metastructure materials and combines a hybrid design of irregularly shaped perforated panels, metastructure modules, and an assembly base to achieve wideband sound absorption and sound insulation, significantly improving noise control capabilities. At the same time, modular assembly helps reduce overall costs and is suitable for noise reduction needs in scenarios such as rail transit and elevated bridges.

The invention provides a radio frequency signal transmission delay adjusting device, which is characterized by comprising a first outer conductor, a second outer conductor, a first inner conductor and a second inner conductor which are coaxially arranged, the first inner conductor comprises a first step section and a second step section in the axial direction, the first step section is arranged in the first outer conductor, and the second step section is arranged in the second outer conductor; the second outer conductor internally comprises a first inner cavity and a second inner cavity along the axial direction, the first outer conductor is inserted in the first inner cavity, and the second inner conductor is arranged in the second inner cavity; one end, close to the first outer conductor, of the second inner conductor comprises a containing cavity extending in the axial direction, and at least part of the second step section is arranged in the containing cavity in a penetrating mode; an adjusting section is arranged between the end, located in the first inner cavity, of the first outer conductor and the end, close to the first inner cavity, of the second inner cavity, the first outer conductor can drive the first inner conductor to move in the axial direction relative to the second outer conductor, the length, penetrating through the containing cavity, of the second step section is changed, and therefore the length of the adjusting section is adjusted.

The utility model discloses a physiotherapy patch heating device relates to physiotherapy patch heating technical field, including heating assembly, and heating assembly is by base and heating plate composition, and the upper end of base is fixedly installed to heating plate, and the outside of heating plate is equipped with the heat preservation heat insulation sleeve ring, and the heat preservation heat insulation sleeve ring is by base ring, heat preservation heat insulation ring and inside contact ring composition, and heat preservation heat insulation ring fixed mounting is on the inner wall of base ring, and inside contact ring fixed mounting is on the inner wall of heat preservation heat insulation ring, and through setting up by heating assembly, heat preservation heat insulation sleeve ring, support frame, rotary limit component and heat preservation compression assembly composition's physiotherapy patch heating device, can place the physiotherapy patch that needs heating to heating assembly heating, utilize support frame, rotary limit component and heat preservation compression assembly simultaneously and press the physiotherapy patch on heating assembly, make the physiotherapy patch can overall with heating assembly contact, ensure that physiotherapy patch is heated evenly, avoid appearing local overheating or heating insufficient condition.

The application relates to an SSD fixing device for fixing an SSD card on a circuit board, comprising a fixing column configured to be fixed on the circuit board and arranged adjacent to the SSD card to be fixed; a supporting seat sleeved and positioned on the outer periphery of the fixing column; a rotating part sleeved on the outer periphery of the fixing column and located above the supporting seat and rotationally connected with the fixing column; wherein the supporting seat is used for axially supporting the rotating part and limiting the axial movement of the rotating part along the fixing column; the rotating part has a pressing part which can press the SSD card or release the SSD card by rotating around the fixing column. Compared with the mode of fixing the SSD card by using screws, the application realizes the pressing and releasing of the SSD card by rotating the rotating part, the operation is simple, the screws do not need to be repeatedly tightened and loosened, the test efficiency in the scene of frequently replacing the SSD card for batch testing is improved, and the problems of screw slipping or loss are avoided.

A new mobile trailer device, comprising a vehicle body and a storage box; the vehicle body is provided with an outwardly opening charging cabin, a charging socket electrically connected with a power supply unit provided with the vehicle body is arranged in the charging cabin, and a cabin cover for opening or closing the opening of the charging cabin is further installed on the vehicle body; the storage box is installed in the charging cabin and is used for storing keys, and the storage box is covered in when the cabin cover closes the opening of the charging cabin; wherein, by setting the storage box to place the keys, the keys can be prevented from falling and being lost, and the design that the storage box is located in the charging cabin and is covered by the cabin cover can confuse the judgment of passers-by and prevent passers-by from learning the position of the keys; therefore, compared with the prior art, the scheme can temporarily secretly store the keys, prevent the keys from being lost and stolen, and ensure that the mobile trailer device can be normally handed over and reduce the risk of being stolen.

The utility model discloses a hearing aid anti-loss rope, and belongs to the technical field of medical auxiliary tools. According to the utility model, the problems of complex operation, inconvenient wearing and the like of hearing aid anti-lost measures in the prior art are solved. The device comprises a neck connecting rope and a hearing aid connecting rope, the middle of the neck connecting rope is connected with the middle of the hearing aid connecting rope, one end of the neck connecting rope is detachably connected with the other end of the neck connecting rope, and a left connecting piece and a right connecting piece which are the same in structure are arranged at the two ends of the hearing aid connecting rope respectively. The left connecting piece comprises a plurality of elastic rings which are sequentially arranged on the hearing aid connecting rope, the elastic rings can be arranged on the hearing aid in an interference sleeving mode, fixing rings are arranged on the two sides of the joint of the neck connecting rope and the hearing aid connecting rope, and the neck connecting rope and the hearing aid connecting rope are sleeved with the fixing rings; and the neck connecting rope and the hearing aid connecting rope are connected in a sliding manner. The hearing aid is simple in structure, convenient to wear, high in comfort level and capable of effectively preventing the hearing aid from being lost.

The invention provides a resonant converter parameter optimization method and system of an electric vertical take-off and landing aircraft, and relates to the technical field of aviation power electronics. The method comprises the following steps: constructing an improved equivalent circuit model containing transformer secondary side leakage inductance; deriving a voltage gain function expression of the improved equivalent circuit model and an optimization calculation formula of the excitation inductance required for realizing the soft switching; parameter optimization is carried out based on the voltage gain function expression and the excitation inductance optimization calculation formula; and building an LLC resonant converter experimental prototype according to the optimized parameters, and carrying out system verification and performance evaluation. According to the invention, the problem of performance reduction caused by neglecting secondary side leakage inductance under a high-frequency working condition in a traditional design is solved, the efficiency, the voltage stabilization precision and the power density of the converter are remarkably improved, and the high requirement of eVTOL on an airborne power supply is met.

The application discloses an electric-thermal comprehensive energy system collaborative frequency modulation method and system, the method comprising: obtaining a frequency deviation parameter in an electric power subsystem and a thermal energy storage state parameter in a thermal power subsystem as a real-time frequency modulation parameter; calculating a frequency deviation change rate and combining the real-time frequency modulation parameter to evaluate a thermal energy storage capacity margin value, generating a composite frequency modulation demand index; generating a multi-time scale frequency modulation task; based on the multi-time scale frequency modulation task, generating an electric-thermal weight distribution value by fusing the frequency deviation change rate and the thermal energy storage capacity margin value; generating an electric-thermal collaborative frequency modulation instruction according to the electric-thermal weight distribution value; and executing the electric-thermal collaborative frequency modulation instruction to control frequency modulation devices in the electric power subsystem and the thermal power subsystem. The application adopts a multi-time scale task decomposition and dynamic weight distribution strategy based on a composite frequency modulation demand index, can realize deep collaboration and optimized control of electric-thermal resources, and improves the frequency modulation performance and operation economy of the comprehensive energy system.

This utility model discloses a tower door locking mechanism, including a tower body and a tower door rotatably mounted on the tower body. The tower door has an arrangement hole for a locking bolt to pass through. A locking screw hole is provided on the tower body. When the locking bolt is screwed into the corresponding locking screw hole, the tower door locks to the tower body. A limit screw hole is provided on the side of the tower door corresponding to the arrangement hole. An annular groove is provided at the rear of the locking bolt, and a limit bolt is detachably installed at the limit screw hole. When the locking bolt is inserted into the arrangement hole, the annular groove aligns with the limit screw hole. When the limit bolt is in place, it enters the annular groove to prevent the locking bolt from exiting the arrangement hole. This utility model, through a simple structural design, limits the locking bolt to the tower door. When workers unlock the bolt, it will not detach from the tower door, thus preventing bolt loss and ensuring that workers can properly lock the tower door, effectively protecting the tower door and internal components of the tower.

The utility model relates to the technical field of moxibustion robots, and discloses a moxibustion robot graphene heating device which comprises a mounting seat, a mounting groove is formed in the bottom of the mounting seat, a heating mechanism is arranged in the mounting groove, a fixing plate is arranged below the mounting seat, and a massage mechanism is arranged at the bottom of the fixing plate; fixing seats are fixedly mounted on the two sides of the mounting seat, two inserting grooves are formed in the bottom of the mounting seat, the mounting groove is located between the two inserting grooves, a piston cavity is formed in the mounting seat, the piston cavity is located above the inserting grooves, and a piston mechanism is arranged in the piston cavity. Compared with the prior art, the heating device has the following advantages and effects that by arranging the limiting mechanism, the purpose of conveniently and fixedly mounting the fixing plate and the mounting base can be achieved, by arranging the sealing mechanism, the purpose of sealing the fixing plate and the mounting base can be achieved, heat can be prevented from being dissipated from gaps, and the heating efficiency is improved; and the use effect is prevented from being influenced.

This invention relates to the field of optoelectronic detection technology and discloses an online detection system for screen color uniformity based on dynamic rotating polarization spectrum. The system includes an online transmission module for carrying and driving the illuminated screen under test to move continuously along a set direction at a set speed; and a combined optical encoding module, positioned above the screen under test, comprising a static spatial-spectral phase delay mask and a continuously rotating polarization modulator arranged sequentially along the beam propagation direction. By driving the screen to continuously translate using the online transmission module, and cooperating with the continuously rotating polarization modulator and hyperspectral acquisition module to acquire dynamic spatiotemporal aliasing data, the accuracy of the spectral dimension can be guaranteed. Furthermore, by extracting high-precision chromaticity parameter matrices and multidimensional polarization distortion feature matrices from the decoupled and reconstructed optimal polarization spectral tensor solution, the system's ability to detect complex internal quality problems can be significantly enhanced.

The application relates to the technical field of robots, and provides a cargo loss prevention method and device in an unmanned vehicle connection process. The method is applied to a control system and comprises the following steps: determining environmental information around a first unmanned vehicle by the first unmanned vehicle; collecting monitoring data determined according to the environmental information when the environmental information meets collection conditions; determining target cargo information; determining actual cargo information unloaded by the first unmanned vehicle when the first unmanned vehicle is connected with a second unmanned vehicle; determining difference cargo if the target cargo information is inconsistent with the actual cargo information, and calling the monitoring data; and determining image information of the difference cargo from the monitoring data. The application can leave traceability evidence after cargo loss in an unmanned vehicle connection cargo compartment process, and find out the cause of the cargo loss according to the traceability evidence, so that the cargo loss can be prevented.

The utility model relates to the technical field of artificial hives, in particular to a modularized field long-term monitoring hive which mainly comprises a main hive. The main nest box is of a box body structure with an opening in the top and used for providing living space for birds. The top opening of the main nest box is detachably connected with a monitoring equipment box through a connecting part to form a modular combination; the connecting part is of an axially-extending reducing structure, one end of the connecting part is matched with a connecting opening in the bottom of the monitoring equipment box, and the other end of the connecting part is matched with an opening in the top of the main nest box. A multi-stage reducing structure is arranged at the end matched with the main hive, and the size of each reducing stage corresponds to the size of an opening in the top of the main hive of different specifications, so that universal connection between the main hive of different specifications and the monitoring equipment box is achieved; the hive breaks through the traditional installation limitation, and the installation and use efficiency of monitoring equipment is greatly improved. And a single part can be conveniently detached and replaced, so that the maintenance difficulty and cost are reduced, and powerful support is provided for bird research and protection work.

This utility model discloses a hand-cranked activated carbon cleaning device, including a cleaning hood mounted between fixed supports via a horizontal shaft. Both ends of the cleaning hood are sealed with support panels. A mesh is evenly distributed on the outer cover between the support panels, and a feed inlet is also provided on the outer cover. Both ends of the horizontal shaft extend out from the support panels, with the extended portions resting on the fixed supports. One end is connected to a hand crank handle. The horizontal shaft is also fixedly connected to the support panels. A water pipe support is provided beside the fixed supports, with the water pipe horizontally mounted on the support and positioned above the cleaning hood. Multiple nozzles are arranged on the water pipe. This utility model device has a simple structure and low cost, suitable for activated carbon cleaning needs in environments without electricity or in small-scale scenarios, as well as for cleaning small-scale (1-20 kg) activated carbon in laboratories.

The utility model discloses a kind of automobile instrument filter cable plug connectors, including the cover plate of installation in the backboard side of automobile instrument, first protrusion is provided inward to cover plate, inside forms accommodating groove, and is equipped with filter, filter is fixed to a PCB board, and first male row and second male row are respectively installed in the upper and lower end side of PCB board;Sealing cover is installed to the outside slot side of accommodating groove corresponding to cover plate, for sealing accommodating groove, female row is provided to the inboard of accommodating groove corresponding to sealing cover, for with second male row butt joint, cable interface is provided to the outside of sealing cover. The cable plug connector of this automobile instrument is overall structure, and accommodating groove is formed by its own recess, for closed installation filter, play good protection effect to filter, and have external cable interface, for the access of various model data line, have built-in interface slot, for the signal connection of internal instrument host part.

This invention discloses a multi-process synergistic method for strengthening and toughening titanium alloys. The method includes: firstly, pre-treating the titanium alloy surface with sandblasting; then, subjecting the pre-treated titanium alloy to solid embedding carburizing treatment; subsequently, under inert atmosphere protection, sequentially subjecting the carburized titanium alloy to solution treatment, rapid cryogenic treatment, and aging treatment; and finally, shot peening the surface of the heat-treated titanium alloy. This invention solves the problem in existing technologies where a single process is insufficient to synergistically improve the strength and toughness of titanium alloys, achieving a synergistic match between high strength and high hardness on the surface of the titanium alloy material and high toughness in the matrix.

This invention belongs to the field of QR code printing control technology, specifically disclosing a variable QR code printing control method. This method includes: importing order parameters containing QR code printing position, content type, and application scenario characteristics; real-time acquisition of the flatness and colorimetric features of the substrate surface; quantifying and generating integrity assurance coefficient and clarity maintenance coefficient based on flatness features and printing position; quantifying and generating color stability coefficient and readability maintenance coefficient based on colorimetric features; comparing and verifying each quality indicator with quality indicator thresholds dynamically generated based on order parameters; if verification passes, printing is executed; otherwise, printing parameters are dynamically adjusted before printing is executed. This invention, through multi-feature fusion and dynamic verification adjustment, significantly improves the printing quality, physical durability, and visual readability of QR codes in complex outdoor environments, and overall enhances the adaptability of the QR code printing process.

The utility model relates to the field of clothing deburring device discloses mothproof and ventilative sweater processing's deburring device, including two fixed plates, two fixed plates are fixed on handheld rod respectively, the below of handheld rod is equipped with connecting block, the bottom surface of connecting block is fixed in two fixed plates, the bottom surface of connecting block detachably installs the brush, the bottom surface of connecting block is equipped with two clamping holes, the top of brush is fixed with two elastic clamping blocks, the clamping hole, elastic clamping block interlock. In the utility model, through the cooperation of fixed plate, handheld rod, connecting block, brush, clamping hole and elastic clamping block, not only provides stable, convenient operation tool for staff, is favorable to the deburring operation of woolen sweater, but also can realize the quick dismounting of brush, improves work efficiency and reduces maintenance cost.

The invention provides a high-speed direct-driven double-cantilever multi-stage cylindrical centrifugal compressor, and relates to the technical field of centrifugal compressors, the compressor is directly driven by a high-speed motor, and multi-stage impellers are serially connected on two sides of a driving spindle in a double-cantilever manner to form a first compression section and a second compression section which are serially connected to work; unification of a high pressure ratio and an extremely compact structure is realized, a transient protection device integrated at the tail end of a stay bolt is provided aiming at specific transient safety risks of the long cantilever rotor, a bearing mounting part of the stay bolt is in clearance fit with an auxiliary bearing, and the stay bolt is kept in non-contact with a rotating part when the compressor operates stably, so that the safety of the compressor is ensured. Unnecessary friction and loss are avoided, the auxiliary bearing can be in contact with the stay bolt before any static runner component only when transient overlarge deflection of the rotor occurs, so that effective mechanical limiting is provided, and collision and abrasion of dynamic and static parts are prevented.