489results about How to "No contact" patented technology

This invention relates to an electromagnetic progressive shaping method for plate moving coils and a device, in which, said device includes a computer control system, an electromagnetic force generation system and a three-shaft digital control shaping system including a plate clamping elevating device, a supporting model frame and an electromagnetic shaping clamping rod, in which, the computer controls the coil to move downward along the contour of a model profile from the top according to the contour data of the model profile and the plate is formed partly relying on the magnetic force of coil till to the bottom of the model and finish the entire process.

The invention relates to a visual sample positioning operating system and a visual sample positioning operating method based on light spot detection. The system comprises a visible laser source, a collimation beam expansion unit, a light beam condensation unit, an electric control mobile sample table, a CCD (charge coupled device) image acquisition unit and a computer, wherein a sample to be detected is loaded on the electric control mobile sample table; visible laser emitted by the visible laser source sequentially passes through the collimation beam expansion unit and the light beam condensation unit to form a conical marking light path; the marking light path is emitted to the sample to be detected to form a marking light spot; the CCD image acquisition unit acquires the marking light spot and sends the marking light spot to the computer; the computer processes the received marking light spot image to obtain marking light spot parameter information, judges a defocusing state of the marking light spot according to the marking light spot information to search a focusing position and controls the electric control mobile sample table to adjust the position of the sample to be detected according to the searched focusing position, so that automatic focusing of the sample to be detected is realized. The visual sample positioning operating system and the visual sample positioning operating method based on the light spot detection can be widely applied to an automatic sample positioning operation.

The invention relates to a target positioning method and a target positioning device for airborne equipment. The device comprises a signal processing unit, a laser distance measuring instrument, a thermal infrared imager, a visible light camera, a combined inertial navigation module and an angle meter, wherein output signals of the laser distance measuring instrument, the thermal infrared imager, the visible light camera, the combined inertial navigation module and the angle meter are all connected to the signal processing unit, and the signal processing unit is used for solving positional information of a target according to uploaded signals. Aerial carrier global positioning system (GPS) information, aerial carrier gesture information, angular deviation of observation equipment relative to an aerial carrier and distance measuring information of the target by the observation equipment are integrated to realize accurate positioning of longitude and latitude height of the target. The advantage of a multi-sensor is combined, a multi-dimensional spatial alternation principle is utilized so as to rapidly and effectively realize accurate target positioning in a non-contact and high-adaptability way, and the target positioning method can be applied to fields such as forest fire prevention, personnel rapid search and rescue and the like, and has wide technological and market prospects.

The invention discloses a magnetic suspension linear motion platform based on the combination of permanent magnets and electromagnets. The electromagnets are vertically installed in a suspensoid, array permanent magnets are arranged on the surface of a guide rail, the suspension of the suspensoid can be realized by utilizing the principle of holopolarity repulsion between the electromagnets and the permanent magnets; and meanwhile, an eddy current displacement sensor is combined to realize the stable suspension of the suspensoid above the guide rail; two pairs of electromagnets are horizontally installed in the suspensoid, which can provide guidance for the linear motion of the platform by combining with the eddy current displacement sensor; a linear motor stator is fixed on a base, a linear motor rotor is fixed on the suspensoid, a grating ruler is arranged on the surface of the guide rail, and the reading head of the grating ruler is installed on the suspensoid, thus the precise linear positioning motion of the suspensoid can be realized. The platform provided by the invention can realize the functions such as super cleaning, high speed, long stroke, precise positioning motion and the like, which can not be realized by the traditional scheme that a rotary servo motor is utilized to drive, a precise ball screw is utilized to transmit and a slide guide is utilized to support, and has the advantages of good load bearing characteristic and stable suspension performance.

The invention provides a laser heating assisted turning device and method. The laser heating assisted turning device comprises a turning device body, a laser device, a non-contact temperature measuring device and a control device, wherein a tool and a workpiece are fixed to the turning device body, the tool is detachably connected with the turning device body, the laser device is used for heating the workpiece through laser, the non-contact temperature measuring device is used for acquiring the temperature at the cutting position of the workpiece in real time, and the control device is used for comparing data of an optimum temperature field stored in the control device with temperature data acquired by the non-contact temperature measuring device in real time and controlling the laser device to adjust laser parameters so as to achieve the optimum temperature field if difference exists. The laser heating assisted turning device has the advantages that the laser parameters are adjusted in a data matching mode so that the temperature field at the cutting position of the workpiece can be always consistent to the optimum temperature field, the cutting performed in the temperature field makes the service life of the tool longest, the machined surface quality of the workpiece is the best, and the turning efficiency is the highest.

The invention discloses a full-automatic LCD detecting control system and method based on an AOI technology. The system comprises an Inline line body PLC module and a detecting workstation, wherein automatic compression joint equipment and an AOI system are arranged in the detecting workstation; the Inline line body PLC module is used for controlling the position of an LCD panel on an assembly line; the automatic compression joint equipment is used for controlling a motor to carry out automatic plug wire compression joint on the LCD panel of the detecting workstation; after plug wire compression joint is finished, the AOI system is informed to begin to detect; after a detection finish signal transmitted from the AOI system is received, a wire is automatically unplugged from the LCD panel; and the AOI system is used for receiving a detection beginning signal and then automatically optically detecting the LCD panel, generating a detecting information file, and transmitting the detecting finish signal to the automatic compression joint equipment. Disadvantages of manual detection can be overcome, the defect detection speed is high, the precision is also high, the system is automatic and practical, a non-contact mode is carried out, and the development prospect in the industry of defect detection of liquid crystal displays is wide.

The invention relates to a seedling nursery disc planting quality testing system and the application in testing. In the system, a conveying belt passes under a pair of cameras; a planting device is arranged above the conveying belt between the pair of cameras; the output signals of the two cameras are connected with a PC, and the program of the PC includes an image processing software. During the application, the conveying belt drives the seedling disc to run to a position below the inlet end, and the camera obtains the image information of the seedling disc prior to planting; when the seedling disc runs to a position below the outlet end of the camera, the camera obtains the image information after planting; the PC obtains the testing result through comparing the information of two images by an image processing software. The invention has the advantages that the complete testing process is free of contact, damage and pollution; human interference and influence are reduced, and the reliability of testing is improved; besides high testing efficiency, the man power and material resources are reduced, and the production cost is lowered.

The invention discloses a screw tightening machine capable of preventing a screw from being brought up. The screw tightening machine comprises a support, a feed mechanism, an upper slide block, a lower slide block, a pushing-up mechanism, an electric screwdriver assembly and a screwdriver head. The support is provided with an air cylinder seat and a pushing-up mechanism seat. The feed mechanism is composed of a main air cylinder and a feed rod. The upper slide block and the lower slide block are arranged on the support. The feed rod of the feed mechanism penetrates through the upper slide block and the lower slide block sequentially. The pushing-up mechanism is arranged on the pushing-up mechanism seat. The screwdriver head is arranged on the lower slide block. The electric screwdriver assembly is arranged on the upper slide block. The feed mechanism and the pushing-up mechanism are adopted for the screw tightening machine, so that when the screw is tightened through a screwdriver, stable axial contact force between the screwdriver and the screw is maintained. When the screwdriver retreats from the screw, the pushing-up mechanism makes the screwdriver head leave the screw fast, so that the hidden trouble that the screw is brought up by the screwdriver head is avoided completely. The screw tightening machine has the advantages of being contactless, easy to control and high in efficiency.

The invention discloses a graphite heat conduction film compound block and a manufacturing method thereof. The graphite heat conduction film compound block comprises a graphite heat conduction film and an adhesive film, wherein a plurality of through holes are formed in the graphite heat conduction film, and all or part of the through holes are filled with a material which is the same as that of the adhesive film. When the graphite heat conduction composite film is used, the end surface of the graphite heat conduction film is jointed with a heat source of a device to be cooled, and the graphite heat conduction film is fixed at the position by the adhesive film through the through holes formed in the graphite heat conduction film, so that the bonding reliability is guaranteed, and the graphite heat conduction film is in contact with the heat source without a barrier; therefore, the heat resistance between the graphite heat conduction film and the heat source can be effectively reduced, and the thermal conductivity of the graphite heat conduction film compound block along the thickness direction can be increased.

The invention discloses an active vibration isolation control platform. The active vibration isolation control platform comprises an active vibration isolation device and an active vibration isolation controller; the active vibration isolation device comprises a lower platform, a midbody and an upper platform; a voice coil motor actuator is arranged between the midbody and the lower platform; a linear variable differential transformer type displacement sensor is arranged between the upper platform and the midbody; and two three-freedom-degree acceleration sensors are arranged on the upper platform and the lower platform respectively. The vibration isolation controller is designed according to a master-slave open type control structure and consists of an upper control computer and a lower execution controller, wherein the upper control computer is a mainframe of an embedded type industrial control computer PC / 104; and the lower execution controller is an open-type controller. The active vibration isolation control platform is quite effective on low-frequency vibration isolation and is applicable to precise manufacture, precise measurement, aerospace application and other vibration isolation fields with special requirement on vibration environment.

The invention discloses a differential magnetic suspension vibration isolator which comprises an upper annular E-shaped electromagnet (15), a lower annular E-shaped electromagnet (11), an upper coil winding (8), a lower coil winding (10), a displacement sensor (1), a connecting flange plate (3), an adjusting nut (4), a spring (6), a linear bearing (7) and an armature (9). The upper annular E-shaped electromagnet (15) and the lower annular E-shaped electromagnet (11) are fixed onto a shell (14) and a base (12) respectively, the upper coil winding (8) and the lower coil winding (10) are fixed onto the upper annular E-shaped electromagnet (15) and the lower annular E-shaped electromagnet (11) respectively, the displacement sensor (1) is fixed onto the shell (14) through a support (16), the connecting flange plate (3), the adjusting nut (4), the spring (6), the linear bearing (7) and the armature (9) are sequentially connected in series from top to bottom through connecting rods (5), the shell (14) is fixed onto the base (12), and a sleeve (13) is fixed into the shell and matched with a spiral groove in the inner wall of the shell to form a sealed cooling water channel. The differential magnetic suspension vibration isolator has the advantages of simple structure, small size, non-contact, long service life, rapid response and easiness in regulating electromagnetic force, and has an excellent application prospect in the field of active vibration noise control.

The present invention relates to a cell cartridge which enables the mass production and stabilization thereof, and in which a plurality of unit cells are assembled in a composite serial-parallel connection method in a case, and thus is modulated. The aim of the present invention is to provide a cell cartridge with a composite intercell connecting net structure, which can be simply assembled, as opposed to conventional methods of binding cells using a glass tape or the like, to shorten the time required for assembly and to enable easy assembly, and to improve the productivity and the accuracy of production standards.; Further, the aim of the present invention is to provide a cell cartridge with a composite intercell connecting net structure in which cells are maintained at a constant interval to prevent problems caused by the direct contact among cells and by the heat generated thereby, to prevent the problems of the performance degradation of cells and the shortened lifespan of a battery caused by the direct contact among cells and by the heat generated thereby, and to enable mass production of standardized module-wide cell packs. To this end, a cell cartridge with a composite intercell connecting net structure is disclosed, wherein said cartridge comprises: a plurality of unit cells; a case which accommodates the unit cells assembled therein; spacing members arranged among the unit cells accommodated in the case to keep the unit cells separate from one another by a predetermined spacing; and a connection plate which is fixed at the inner surface of the case, and equipped with terminals connected to the terminal of each of the unit cells to connect the unit cells in a composite serial-parallel fashion.

The invention discloses a masking plate and array substrate manufacturing method and aims to simplify the manufacturing process of an organic light-emitting diode display panel, save manufacturing cost and improve the product yield. The masking plate comprises a masking plate body and a supporting structure, wherein the masking plate body has a first side surface facing a substrate in the vapor plating process and a second side surface at the back of the substrate, the supporting structure comprises multiple supporting projections arranged at the first side surface of the masking plate body, and surfaces of the supporting projections are smooth transition surfaces.

The invention discloses an electromagnetic excitation shafting loading device. The electromagnetic excitation shafting loading device is composed of an axial loading device, a radial loading device, an armature, a current generating device and a load measuring device. The axial loading device and the radial loading device are respectively used for exerting the axial and radial loads on the shafting. The static and dynamic loads can be simultaneously loaded by using the electromagnet principle, and the static load also can be only loaded. The loaded load is controlled by the input current; the loaded dynamic load can be a single-frequency exciting force, and can be the combination of a plurality of exciting forces. The invention provides a new technical approach for simulating ship shafting vibration and ship stern vibration caused by the ship propeller exciting force and the ship structure noise caused by these vibrations, realizes the contact-free and friction-free purpose of the shafting; the loading of the precise single-frequency sine wave exciting force and the loading of the combined waveform exciting force are mainly used for the excitation experiment of the ship shafting experiment table or ship shafting berth, and can be further used for the excitation experiment underwater.

The invention relates to an improved corrugated board production line which comprises an inner body paper rack used for placing corrugated inner paper of the corrugated board, an inner paper preheating cylinder used for heating the corrugated inner paper, a corrugated body paper rack used for placing the corrugated paper, a corrugated paper preheating cylinder used for heating the corrugated paper, a corrugating machine used for corrugating the corrugated paper and adhering the corrugated inner paper and the corrugated paper, a surface body paper rack used for placing corrugated surface paper, a pasting machine used for gluing the to-be-adhered upper surface of the corrugated paper, and a double-faced machine used for adhering the to-be-adhered upper surface of the corrugated paper and the lower surface of the corrugated surface paper. The improved corrugated board production line disclosed by the invention is compact in structure, reasonable in design and convenient to use, has the capacities of saving energy, reducing consumption, optimizing the process and lowering the cost, and is suitable for large-scale popularization.

The invention discloses a method and an instrument thereof for an acoustic diagnosis of an automobile engine, which relate to a technique for diagnosing the automobile engine, namely a method and the instrument thereof for determining whether the working condition of the engine is normal or not by using acoustic features of the sound production of the engine. The instrument comprises a sound transducer (1), an analog-digital converter (2) and a data processor (3) which are connected with one another in turn from front to back. The method and the instrument thereof can discover whether the automobile engine works normally or not during driving under the condition of not influencing road automobile running for a traffic control department to realize a non-contact diagnosis and eliminate driveway hidden dangers of a vehicle with an abnormal engine in time; besides, the method and the instrument can also provide a practical diagnostic technique for other automotive vehicles.

The invention relates to a thin material laser on-line perforating device comprising a high-power continuous laser, a prism light-splitting mechanism, a vibrating mirror scanning focusing system, a perforating output mechanism and a delivery mechanism. The prism light-splitting mechanism comprises a prism and a high-speed motor driving the prism to rotate; the vibrating mirror scanning focusing system comprises N vibrating mirror scanning focusing mechanisms; the perforating output mechanism comprises N laser perforating processing heads which respectively correspond to the vibrating scanningfocusing mechanism and are arranged on the delivery mechanism, wherein N is no less than 2. The thin material laser on-line perforating device can densely perforate the thin material in large width by utilizing the prism light-splitting mechanism and only adopting the single high power continuous laser, not only has high efficiency, smaller perforating distance of product produced and better ventilation property, but also has simple structure, low cost and higher performance-price ratio.

The invention discloses a method for checking attendance by means of face recognition at mobile ends. The method includes steps of 1, carrying out registration by company administrators via application programs at the mobile ends; 2, carrying out information registration and face registration by company staffs via company codes; 3, allowing the staffs to log in attendance checking application programs at the mobile ends via the company codes, user names and initial passwords to carry out attendance checking; 4, carrying out face recognition on detected face images on servers and feeding attendance checking results to users; 5, writing attendance checking information in databases, allowing company administrative staffs to check attendance conditions of the staffs via programs in mobile phones, synchronizing attendance checking data to company staff management systems and carrying out unified management. The invention further provides a system for checking the attendance by means of face recognition at the mobile ends. The method and the system have the advantages that the locations of the staffs with the attendance to be checked can be determined by the aid of positioning information, identity of the staffs with the attendance to be checked can be determined by means of face recognition, the locations and the identity of the staffs are combined with one another, and accordingly the attendance of the staffs can be checked at the mobile ends in specified ranges.

The present invention discloses a thermal-current generating system by complementing geothermal energy and solar energy, including a chimney, a turbine generator arranged at the bottom of the chimney and a heat collecting shelter for collecting solar energy arranged below the chimney. The present invention is characterized in that the inside of the heat collecting shelter is provided with a coiled radiator; the coiled radiator is respectively connected with a first geothermal well, a regenerative tank and a second geothermal well through a pipeline and a valve. The system effectively solves the operating continuity and the stability of the solar thermal-current power station, improves the peak load capacity of the power station and provides guarantee for the interconnected synchronous generation.

A laser furnace for smelting different alloys, the metal or alloy difficult to smelt, pure alloy, etc is composed of furnace body, copper mould, cooling water unit, atmosphere protector, upper furnace body and top cover, and features the laser beams are used as heat source for smelting alloy.

The invention discloses a bearing-free permanent magnetic synchronous generator. A permanent magnetic rotor is coaxially sleeved with a stator iron core, the stator iron core is evenly provided with 36 stator grooves in the circumferential direction, and each stator groove is internally provided with an inner layer winding and an outer layer winding. Each outer layer winding is composed of two pairs of pole generation windings, the number of stator grooves of each pole and each phase is three, and each inner layer winding is a pair of pole suspension force windings and two pairs of pole excitation windings. The generation windings are distributed according to an A1+ phase, a B1- phase, a C1+ phase, an A1- phase, a B1+ phase, a C1- phase, an A2+ phase, a B2- phase, a C2+ phase, an A2- phase, a B2+ phase and a C2- phase in the clockwise direction. The suspension force windings are distributed according to an a+ phase, a b- phase, a c+ phase, an a- phase, a b+ phase and a c- phase in the clockwise direction. The excitation windings are distributed according to an X1+ phase, a Y1- phase, a Z1+ phase, an X1- phase, a Y1+ phase, a Z1- phase, an X2+ phase, a Y2- phase, a Z2+ phase, an X2- phase, a Y2+ phase and a Z2- phase in the clockwise direction. Operation reliability of a motor under special working conditions is improved.

The invention relates to a system and method for recognizing the motion state of a twisting type roller winding and unwinding steel wire rope, which are suitable for detecting the motion state of the steel wire ropes of mine hoisting systems and elevator traction systems. The system comprises an industrial camera, a steel wire rope axial-speed measuring device and an industrial personal computer, wherein the industrial personal computer is used for receiving an image signal obtained by shooting a roller rope outlet point with the industrial camera and an axial motion speed signal of the steel wire rope collected by a shaft encoder, and comprehensively motoring the motion state of the steel wire rope. The comprehensive monitoring for the circular degree of a roller, the disorder station of the roller steel wire rope and the real-time speed of a lifting container is realized. The visualization, automation and intelligentization of monitoring the motion state of the twisting type roller winding and unwinding steel wire rope are realized. The system has the advantages of being simple in structure, convenient to operate and good in using effect.

The invention provides a rotation connector with which two flat cables with wide-width strip conductors can be connected with a wire-leading block easily. End portions in the length direction of a first flat cable and a second flat cable (5, 6) are formed into shapes that are formed by cutting off sides in the width direction and enabling the strip conductors (19) to be exposed in the front end sides of the rest narrow-width portions (5a, 6a). The strip conductor (19) is connected with a pair of connection terminals (30) arranged in the wire-leading block (12 (or 22)) respectively. Besides, the end portions in the length direction of the first flat cable and the second flat cable (5, 6) are positionally overlapped with each other in a manner that the narrow-width portion (5a, (6a))of one flat cable is configured on a cut portion (6b (5b)) of the other flat cable. In the wire-leading block, the end portion which is adjacent to the cut portion (5b) and is in the length direction of the first flat cable (5) that is as a lower layer side bends towards the direction that is away from the narrow-width portion (6b) of the second flat cable (6) that is as an upper layer side.

The invention discloses a shortening-related thermal tomography detection method and a shortening-related thermal tomography detection system for GFRP (glass fiber reinforced plastics) crack defects. The shortening-related thermal tomography detection system comprises a thermal infrared imager, an Ethernet cable, a computer, a USB (universal serial bus) data line, a BCN (broadband communication network) triggering signal line, a data collection card, a BNC data line, a laser device power source, a laser device power line, a laser device, an optical fiber and a collimating lens. The thermal infrared imager is connected with the computer through the Ethernet cable, the computer is connected with the data collection card through the USB data line, the data collection card is connected with the thermal infrared imager through the BNC triggering signal line and is connected with the laser device power source through the BNC data line, the laser device power source is connected with the laser device through the laser device power line, and the laser device is connected with the collimating lens through the optical fiber. The shortening-related thermal tomography detection system has the advantages that completely-damage-free, non-contact and efficient detection of the crack defects of GFRP materials can be realized, and dimensional limitation of detection materials is avoided.

The invention discloses an organic light-emitting display with a glass material packaging body and a manufacturing method thereof. The display comprises a packaging structure, wherein the packaging structure comprises a first substrate, a second substrate, an organic light-emitting unit, a glass material packaging body and a first colloid, wherein the first substrate comprises at least one first substrate cutting side surface formed by cutting, the second substrate comprises at least one second substrate cutting side surface formed by cutting, the glass material packaging body is connected with the first substrate and the second substrate, and the first colloid comprises at least one colloid cutting side face which is formed by cutting and is adjacent to the first substrate cutting side surface and the second substrate cutting side surface. Therefore, when the packaging structure is cut by the first colloid, a function of buffering the cutting stress is realized, and the external force impact resistance of the packaging structure can be further enhanced. In addition, the invention also provides a method for manufacturing the organic light-emitting display.

A real-time measurement method of pupil diameters based on the binocular stereo vision is provided. The method comprises: using Zhang Zhengyou's dual target method for camera calibration to obtain a rotation matrix, a translation matrix, a parameter matrix in the left industrial camera, and a parameter matrix in the right industrial camera; respectively processing images captured by the left industrial camera and the right industrial camera to obtain true ellipses corresponding to the pupil; drawing a straight line across the center of the true ellipse of the pupil obtained by the left industrial camera, wherein the straight line equation is intersected by the true ellipse of the left industrial camera to obtain a first intersection point and a second intersection point; according to the principle of polar line constraint and order consistency, by using the first intersection point and the second intersection point, respectively solving a first matching point and a second matching point corresponding to the two intersection points on the true ellipse obtained by the right industrial camera; and obtaining preliminary values of a plurality of pupil diameters corresponding to a plurality of straight lines with different slopes, and solving an average value to obtain a final result. The method provided by the present invention has high measurement precision, does not require the worker to fix the working distance, and has great application value.

The invention provides a horizontal tuning frame type eddy current damper. The horizontal tuning frame type eddy current damper comprises a supporting system, a spring mass system, an eddy current damping system and a negative stiffness system, wherein the supporting system comprises an outer frame and a guide rod; the spring mass system comprises a spring and a balancing weight; the eddy currentdamping system comprises a low-speed end permanent magnet, a high-speed end permanent magnet, a guide rail, a sliding block, a magnetism adjusting plate, a conductor plate and back iron; the negativestiffness system comprises a moving permanent magnet and a fixed permanent magnet; and the damper applies the magnetic field modulation principle and the concept of a negative stiffness nonlinear energy trap. The moving speed of the high-speed end permanent magnet is increased through the magnetism adjusting plate, and the energy consumption efficiency of the damper is improved. The movement of the balancing weight can be promoted through the tangential component of repulsive force between the permanent magnets of the same name, and therefore the vibration reduction frequency band is widened,robustness is better, and the problem that the vibration reduction effect is poor when a traditional tuning mass damper is out of order is solved.

The invention discloses a remote control system for temporary ground wires, comprising a management server, a detection locking mechanism, a communication server and a ground wire. The management server and a five-prevention management host are connected by a ground wire identification code and locking attachments on the ground wire. The remote control system has the following beneficial effects: a non-contact online detection state is adopted, contact and wear are avoided, the service life is long, and unlocking operation is verified in multiple ways to prevent safety accidents caused by personal failure of staff. Moreover, storage, unlocking and positions of ground wires of a plurality of substations can be monitored and managed in real time.

The invention discloses a pull-up detection system and method based on bone and face key points. The pull-up detection system comprises an image acquisition module for processing an image acquired bya camera to acquire image recognition information; an image recognition module which is used for extracting face key points, human skeleton key points and cross rod positions; an action detection module which is used for judging whether the pull-up behavior starts and ends or not according to the relative positions of the wrist skeleton key points and the cross rod, judging whether the human bodyascends or descends according to the included angle between the big arm and the forearm, calculating the relative position of the cross rod and the jaw, judging whether one pull-up action is completedor not according to the ascending and descending states and judging the action completion effective degree;; an action counting module which is used for recording the pull-up action completion times;and a data display module is used for displaying the pull-up action completion times.

The invention discloses a charging pump for a nuclear power station, which comprises a stator component, a rotor component, a bearing component and a shaft sealing device. The stator component comprises a pump head, a barrel and a tail board, the barrel comprises an outer shell and an inner shell, the rotor component comprises a rotary shaft, an impeller, a middle shaft sleeve, a front shaft sleeve, a thrust disc, a positioning sleeve and a rear bearing sleeve, wherein the impeller, the middle shaft sleeve, the front shaft sleeve, the thrust disc, the positioning sleeve and the rear bearing sleeve are sleeved on the rotary shaft, and the bearing component comprises a drive-end bearing, a middle auxiliary bearing and a non-driven-end bearing. The charging pump for the nuclear power station has the advantages that the size of the charging pump can be reduced, special performance requirements of the charging pump are met, and working efficiency is high.