5719 results about "Bushing" patented technology

The invention discloses a transformer bushing high-frequency partial discharge signal on-line monitoring method and system, and relates to the technical field of electrical equipment insulation state monitoring, and the method comprises the steps: synchronously collecting signals based on a high-frequency current sensor and an ultrahigh-frequency sensor; performing mixed noise reduction and feature extraction according to the collected signals; and carrying out discharge type identification on the processed data by constructing a lightweight convolutional neural network, and carrying out early warning and positioning in combination with a dynamic alarm threshold. The method can significantly improve the signal-to-noise ratio and enhance the weak discharge signal detection capability by combining the dual-mode sensor with a hybrid noise reduction strategy of wavelet packet decomposition and adaptive filtering, adopts the lightweight convolutional neural network, supports edge equipment to implement reasoning, realizes intelligent identification of the discharge type, and improves the detection accuracy of the weak discharge signal. The insulation state of the transformer bushing is monitored online in real time, off-line dependence is reduced, the service life of equipment is prolonged, and the intelligent level of operation and maintenance of a power system is improved.

The invention discloses an automatic shock absorber assembling device and method. The automatic shock absorber assembling device comprises a rack, a rotating disc, a graduator arranged on a shell and used for driving the rotating disc to rotate and a plurality of jigs circumferentially arranged on the rotating disc. The shell and lining feeding and press-fitting mechanism, the transferring mechanism, the sealing cover feeding mechanism, the spin riveting mechanism, the torque detection mechanism and the discharging mechanism are arranged on the machine frame. The shock absorber assembling device has the advantages that the integration degree of all the mechanisms is high, products can be rapidly assembled, the shock absorber assembling efficiency is effectively improved, the size of the whole device is reduced, and the manufacturing cost is saved. According to the shell and lining feeding press-fitting mechanism, linings and shells can be fed at the same time, multiple performance detection of the linings can be completed, synchronous movement of the linings in all assemblies is achieved through the linkage transfer mechanism, and the press-fitting efficiency between the shells and the linings is effectively improved.

The invention discloses a transmission assembly assembling device which comprises a rotary disc assembly, a synchronous material taking and assembling unit, a pawl material taking and assembling mechanism, a shaft sleeve material taking and assembling mechanism, a bearing material taking and assembling mechanism, a pressing mechanism and a discharging mechanism, and the pawl material taking and assembling mechanism, the shaft sleeve material taking and assembling mechanism, the bearing material taking and assembling mechanism, the pressing mechanism and the discharging mechanism are all installed on a workbench. The synchronous material taking and assembling unit comprises a ratchet ring material taking and assembling mechanism, a crankshaft material taking and assembling mechanism and a gasket material taking and assembling mechanism which are installed on the first translation module and located above the rotary disc assembly, and a ratchet ring material conveying mechanism, a crankshaft material conveying mechanism and a gasket material conveying mechanism are arranged at the first working position of the synchronous material taking and assembling unit; the second working position of the synchronous material taking and assembling unit is matched with the third assembling positioning hole, a shaft sleeve conveying mechanism is arranged at the first working position of the pawl material taking and assembling mechanism, and a bearing conveying mechanism is arranged at the first working position of the bearing material taking and assembling mechanism. Automatic assembly can be achieved, and the assembly efficiency is improved.

The invention discloses a fault detonation simulation test method and platform for an extra-high voltage converter transformer network side bushing, and the method comprises the steps: providing a critical value calculation method for primary physical explosion and secondary chemical explosion of the extra-high voltage converter transformer network side bushing under different arc fault energy conditions; and the critical conditions of primary physical explosion and secondary chemical explosion can be accurately judged. According to the invention, the whole dynamic evolution process from rapid cracking of transformer oil and sudden pressure increase caused by converter transformer fault arc to superposition of physical explosion and explosion chemistry can be truly simulated, a grid-side bushing fault detonation critical discrimination method is provided, and technical parameters and theoretical support are provided for the explosion-proof and pressure-relief design of the converter transformer.

The invention discloses a sleeve fault diagnosis method and system. The method comprises the following steps: preprocessing an acquired sleeve infrared image to filter out a non-heating part; segmenting the image of which the non-heating part is filtered out to obtain a single sleeve image; diagnosing the sleeve fault according to the segmented single sleeve image. According to the invention, theinfrared image of the transformer sleeve is preprocessed and segmented, therefore, an infrared image of a single sleeve is obtained; the temperature of each part of the sleeve can be conveniently obtained by converting the gray scale of each pixel in the gray scale map of the infrared image of the single sleeve into the corresponding temperature value, the method is simple but very ingenious, thefaulted sleeve and the faulted area can be quickly positioned, the specific fault type can be judged, and convenience and quickness are achieved.

A position sensor of a motor includes: a housing in which a hollow is formed and an accommodation space is formed as surrounding the hollow; a ground ring formed through an inner circumferential surface of the housing; a first PCB installed in the accommodation space and formed with a first circuit part; an induction unit facing the first PCB and rotates; a connecting bushing embedded in the housing and electrically connected to the ground by a fastening member; and a relay unit installed in the accommodation space and relaying the ground ring and the connection bushing. The ground ring is formed with a body formed through the inner circumferential surface, a contact part formed on one side of the body and disposed of in the hollow, and a first connection part extending from the other side of the body and contacting the relay unit.

The invention discloses an oil-immersed transformer active defense method and system based on pulse current characteristics. The acquisition device is used for acquiring output signals of high-frequency pulse current sensors mounted at a high-voltage bushing end screen grounding position, a high-voltage bushing position and an iron core grounding position to obtain digital pulse current signals; whether active defense is started or not is judged according to whether the instantaneous value of the pulse current signal at the iron core grounding position reaches a protection starting threshold or not; judging whether the current pulse cluster is a discharge pulse cluster with abnormal internal discharge or not based on the three groups of pulse current signal characteristics; and judging whether protection acts or not according to the number of abnormal discharge pulse clusters in a set period. According to the method, serious partial discharge in the large oil-immersed transformer can be identified, protection measures are actively taken, and the situation that serious discharge defects are further developed into arc breakdown faults is effectively avoided.

The invention relates to the technical field of oil field fracturing operation, and provides a horizontal well shaft completion pipe string and a reconstruction method.The horizontal well shaft completion pipe string comprises an original casing pipe, an inner casing pipe, a suspension packer, a shearing ball seat, a float collar, a float shoe and a plurality of composite metal pipe outer packers.The suspension packer is connected to one end of the inner casing pipe, and the shearing ball seat, the float collar and the float shoe are sequentially connected to the other end of the inner casing pipe; a plurality of composite metal pipe outer packers are sequentially arranged on the inner casing pipe at intervals and used for blocking an annular space between the original casing pipe and the inner casing pipe and forming a plurality of fracturing sections, the inner drift diameter of a reconstructed new shaft is large, large-displacement and high-pressure fracturing construction can be met, the construction cost is reduced, the repeated transformation efficiency of an old well reservoir is improved, and the construction period is shortened. And in the later period, the original gas production section can be ejected to implement commingling production, and the oil-gas output efficiency is further improved.

The invention relates to the technical field of high-voltage electrical equipment, and particularly discloses a high-insulating-property thermoplastic sleeve and a method for preparing the same based on a co-extrusion process, the surface of a nonlinear layer is wrapped with an insulating material, so that the corona discharge phenomenon is avoided; and meanwhile, the same thermoplastic material is adopted as the insulating layer (including the first thermoplastic layer and the second thermoplastic layer) material and the base material of the nonlinear layer, so that no obvious interface exists between the insulating layer and the nonlinear layer, charge accumulation is avoided, insulation failure is avoided, the insulation and voltage resistance of the sleeve is improved, and the operation reliability is improved.

The invention discloses a laminated structure and a differentiated hole machining method of the laminated structure, and relates to the technical field of machining, the method comprises the steps that S1, first reaming is conducted on the laminated structure, and the laminated structure comprises two or more layers of laminated plates; s2, linings made of matched materials are selected according to the material characteristics of different plates; s3, bushings made of different materials are installed in the reamed holes of the matched plates by pulling the core rod; s4, the linings made of the different materials are extruded, so that the linings made of the different materials are in interference fit with the matched plates; and S5, secondary reaming is conducted on the laminated structure according to the assembly requirement, so that the inner diameters of the deformed bushings made of different materials are the same. According to the method, the fatigue performance of plates made of different materials is coordinated through a differential hole machining method, and the fatigue life of the laminated structure is remarkably prolonged; and it is guaranteed that hole machining of different machining amounts is conducted on the laminated structure under one-time hole forming, the continuity of the hole forming technology is guaranteed, and the hole position precision is improved.

The invention provides a transformer partial discharge positioning method and device based on bushing CT acquisition. The method comprises the following steps: acquiring a high-frequency partial discharge pulse signal of a current transformer at a transformer bushing; background noise of the pulse signal is removed, amplitude correction is carried out, and a corrected pulse signal is obtained; judging whether the partial discharge belongs to external interference or internal partial discharge based on the polarity distribution rule of the corrected pulse signal; if the interference is external interference, comparing the amplitudes of the correction acquisition signals corresponding to the bushings, and taking the position corresponding to the current transformer with the maximum amplitude as an interference source injection position; if partial discharge occurs in the transformer, calculating the distance proportion from the partial discharge position to the head end of the winding according to the attenuation characteristic of the pulse signal propagating in the winding and the pre-injected calibration square wave signal so as to determine the discharge position. According to the method, the method for determining the partial discharge position of the transformer is simplified, external interference and internal partial discharge signals can be quickly identified, and misoperation of a protection device is avoided.

The invention discloses metal bushing press-fitting equipment, which relates to the technical field of metal automatic assembly, and has the technical key points that the metal bushing press-fitting equipment comprises a bushing feeding mechanism: a discharge port of a vibration disc is connected with an inclined first feeding slideway and then connected with a positioning groove, the bottom of the vibration disc is provided with a strip-shaped turnover port and a transmission belt, a belt driving assembly drives the belt to operate, and the direction is vertical to the feeding direction; a height limiting rod is arranged on the position adjusting groove, so that the lining topples over, and the lower portion is funnel-shaped and connected with a second feeding slide way; the bottom of a second feeding slide way is connected with a to-be-taken groove, the width in the groove is equal to the outer diameter of the bushing, and a limiting plate and a bushing adsorption assembly are arranged at one end and form a rectangular groove; according to the press-fitting mechanism, a workbench is provided with a first positioning assembly, an upper fixing frame top beam is connected with a lifting press-fitting assembly through a translation assembly, and a bottom movable part is connected with a clamping assembly and used for taking the lining. According to the automatic press-fitting device, the positioning precision of feeding and taking can be improved, and the efficiency and effect of automatic press-fitting are guaranteed.

The embodiment of the invention provides a transformer bushing oil extraction tool system and a control method and device thereof, and the system comprises a multi-degree-of-freedom flexible positioning module, a real-time data collection and feedback control module, an electrical isolation and insulation module, and an intelligent alarm system. Automatic operation of oil extraction of the transformer bushing in an electrified environment can be achieved, the accuracy, the sealing performance and the safety of the oil extraction process are ensured, and the efficiency and the reliability of equipment maintenance are improved. Wherein the flexible positioning module enables the oil taking module to be accurately in butt joint with an oil taking port, the data acquisition and feedback control module monitors and adjusts pressure and flow in real time, and the stability of oil taking is ensured; the electrical isolation module provides necessary insulation protection to avoid high-voltage risks; and the alarm system automatically gives an alarm and stops operation when abnormity occurs, so that multi-layer safety guarantee is provided for system operation.

The invention discloses a precise connecting rod bushing forming process, which relates to the field of multi-pass spinning forming and comprises the steps of S1, blank customization, S2, die optimization, S3, blank clamping and positioning, S4, spinning roller track planning, S5, size measurement and parameter adjustment, S6, multi-pass successive approximation, S7, parameter optimization and S8, quality detection. And S9, stress relief is conducted, specifically, the connecting rod bushing obtained after spinning is put into a box-type resistance furnace to be subjected to low-temperature tempering treatment, the tempering temperature is set to range from 200 DEG C to 250 DEG C, the heat preservation time ranges from 2 hours to 3 hours, and then the connecting rod bushing is cooled to the room temperature along with the furnace. Through spinning roller track planning, size measurement, parameter adjustment and multi-pass successive approximation, it is ensured that the size precision and stability of the formed precise connecting rod bushing are improved, through stress relief, the mechanical property of the formed precise connecting rod bushing is excellent, meanwhile, a mold is optimized, stress concentration is reduced, and the production efficiency is improved. Through track planning, size measurement and parameter adjustment of the spinning roller, the production process is efficient and controllable.

The invention discloses an axial-radial integrated loading rotating shaft bush high-temperature swing friction-wear testing machine, and belongs to the technical field of friction-wear testing, the axial-radial integrated loading rotating shaft bush high-temperature swing friction-wear testing machine comprises a bottom plate, a loading module is arranged on the bottom plate, one side of the loading module is connected with a high-temperature clamp module, one side of the high-temperature clamp module is connected with a motion generation module, and the motion generation module is connected with the loading module. One side of the motion generation module is connected with an electric control box body, and one side of the electric control box body is connected with a control computer. According to the axial-radial integrated loading rotating shaft bush high-temperature swing friction wear testing machine disclosed by the invention, synchronous application of an axial load and a radial load is realized through cooperative control of double stepping motors in the loading module; meanwhile, the influence of the coupling on torque measurement is effectively eliminated through the self-designed coupling, and the accuracy of synchronous application is improved.

The utility model provides a spring-free type bushing end screen, which belongs to the technical field of bushing end screens and comprises a flange seat, an insulating sealing sleeve is embedded in an inner cavity of the flange seat and is clamped in the inner cavity of the flange seat through a locking component, and a locking thread is arranged at the end part, far away from the flange seat, of a binding post along the outer wall. The inner wall of the side, away from the flange hole, of the flange base is in threaded connection with a grounding piece, the grounding piece is arranged outside the locking thread in a sleeving mode, anti-skid lines are arranged on the outer wall of the grounding piece in the circumferential direction, external threads are formed in the bottom of the outer wall of the grounding piece in the circumferential direction, internal threads are formed in the top of the inner wall of the flange base, and therefore the grounding piece is in threaded connection with the top of an inner cavity of the flange base. After the grounding piece is in threaded connection with the flange seat, the end screen is in a continuous grounding state, stable operation of the transformer is guaranteed under the condition that overall stability is guaranteed, and the protection effect is enhanced.

The invention is suitable for the field of cycloidal speed reducers, and provides a cycloidal speed reducer which comprises a shell, an input mechanism, an output mechanism, a speed reduction mechanism and a limiting assembly, and is characterized in that the shell comprises a speed reduction supporting front shell and a speed reduction supporting rear shell, and threaded holes are formed in the speed reduction supporting front shell and the speed reduction supporting rear shell; threaded holes are formed in the speed reduction supporting front shell and the speed reduction supporting rear shell in an annular mode, the speed reduction supporting front shell and the speed reduction supporting rear shell are installed in a matched mode through screws, the machining cost of the cycloid speed reducer is reduced, the service life is prolonged, the loss of parts is smaller, meanwhile, the service life can be prolonged by replacing a quick-wear shaft sleeve, and the service life of the cycloid speed reducer is prolonged. And the use cost of the cycloidal-pin wheel speed reducer is further reduced.

Method of removing casing from a well, in which an annulus between the outside of the casing and the inside of a surrounding downhole body is at least partially filled by debris, the perforated section of casing is washed in casing lengths shorter than the perforation length and an attempt made to pull the casing after each shorter length is washed. If the casing is free after washing only a shorter section of the perforated section of casing then it can be recovered and saves the washing time. A bottom hole assembly is described which includes a downhole power tool to exert a greater force to pull the section of casing between washing steps.

The invention discloses a self-adaptive parallel clamp and method suitable for a bush-disc test, and belongs to the technical field of mechanical engineering, the self-adaptive parallel clamp comprises a supporting mechanism, a parallelism adjusting mechanism is arranged in the supporting mechanism, the lower end of the supporting mechanism is connected with a clamping rod, the lower end of the clamping rod is provided with a sample clamping mechanism, and the sample clamping mechanism is provided with a clamping mechanism. And a movement mechanism is arranged at the lower end of the sample clamping mechanism. By adopting the self-adaptive parallel clamp suitable for the lining-disc test, the problem of parallelism error between the lining and the disc is solved, so that the horizontal load error and the friction force and friction coefficient measurement error caused by the error are reduced, and a more accurate surface-surface friction wear disc test is realized.

A press tool system for pressing a bushing assembly into a bushing opening defined by a structural member comprising a tool assembly and an actuator system. The press tool system comprises a tool assembly and an actuator system. The tool assembly comprises a brace assembly, a drive member, and a retaining sleeve. The actuator system comprises an actuator housing assembly and a piston member. The brace assembly is arranged to brace the actuator housing assembly relative to the structural member. The drive member is arranged between the piston member and the bushing assembly. The retaining sleeve is arranged at least partly around the bushing assembly. The actuator system displaces the piston member relative to the actuator housing assembly to force the bushing assembly at least partly through the retaining sleeve and into the bushing opening in a desired position relative to the structural member.

The utility model belongs to the field of dust removal and environmental protection of a coal-fired power plant, and particularly relates to a pre-charged adjustable high-voltage wire inlet system of an electric precipitator, which comprises a pre-charged device and a wall bushing which are arranged at the front end of the electric precipitator, the pre-charged device is provided with a high-voltage power supply, and the high-voltage power supply is provided with a double-switch disconnecting link and is connected with an insulating pillar through a high-voltage lead. Every two adjacent insulation supporting columns are connected through a rigid material, and the last insulation supporting column is connected with a wall bushing on a wall plate through a high-voltage wire and then connected with a pre-charging device to conduct power supply. According to the utility model, one high-voltage power supply is used for supplying power to the pre-charging devices arranged on the two or more loudspeakers, each pre-charging device can be independently disconnected without influencing the normal operation of other pre-charging devices and an electric field under the condition that a main power supply is not cut off, and on the premise that the pre-charging devices normally operate the required high-voltage power supply, the pre-charging devices can be independently disconnected. The construction cost is greatly saved, and the market competitiveness is improved.

The invention relates to the technical field of high-voltage bushings, in particular to a 72.5 kV impregnated paper high-voltage bushing which comprises a sheath layer, an insulation paper layer, an impregnation medium, a flexible supporting structure, a temperature control layer, a self-healing insulation medium and a connecting end. The sheath layer is made of aluminum alloy and is used for providing mechanical protection and support; the insulation paper layer adopts multi-layer high-elasticity polyester impregnated paper, so that excellent electrical insulation performance is provided; the impregnation medium is selected from nano reinforced silicone oil and is uniformly filled between the insulation paper layers, so that the insulation performance is enhanced, and the moisture-proof and anti-pollution capacities are improved. The flexible supporting structure comprises a honeycomb-shaped FRP supporting layer and a shape memory alloy connecting piece, mechanical stress generated in transportation, installation and long-term operation can be effectively absorbed, and the structural integrity is kept under the complex environment such as foundation settlement or temperature change. The high-voltage cable has the advantages of high insulating property, high mechanical strength, excellent environmental adaptability and self-repairing capability, is suitable for transformer substations, power transmission lines and other high-voltage electrical equipment, and has wide application prospects.

According to the method and system for detecting the oil level of the oil-immersed transformer bushing, an upper computer adopts a simulation method to determine the installation position, the transmitting power and the transmitting frequency of an ultrasonic probe in a detection device, determines effective echo signals from n times of echo signals, and determines the propagation duration of the effective echo signals when no oil exists in the bushing and when oil exists in the bushing; fixing the detection device on the side wall of the sleeve according to the mounting position of the ultrasonic probe; the upper computer verifies whether the current position of the ultrasonic probe is deviated from the mounting position or not; if no deviation exists, the upper computer sends a detection instruction to the detection device; when receiving the detection instruction, the detection device detects the propagation duration of an effective echo signal in the to-be-detected sleeve and uploads the propagation duration to the upper computer; the upper computer judges whether the oil level is detected or not according to the propagation duration of the effective echo signal when no oil exists in the casing and oil exists in the casing and the propagation duration of the effective echo signal in the casing to be detected; when it is judged that the oil level is detected, the upper computer outputs the oil level of the casing pipe.

The invention discloses a battery box accessory welding tool for a new energy automobile, and relates to the technical field of battery box machining, the battery box accessory welding tool comprises a base, a mounting platform is arranged on the base, a supporting plate assembly is arranged on the mounting platform, and a lining welding tool, a support welding tool and a sealing plate welding tool are arranged on the supporting plate assembly; the bush welding tool comprises a plurality of rotary pressing assemblies A, a rotary pressing assembly B and a powerful pressing assembly, and a bush positioning assembly is arranged on the portion, below a front end pressing head of the rotary pressing assembly B, of the supporting plate assembly. The battery box accessory welding device is reasonable in structural design, battery box accessories are stably supported, positioned and clamped through the lining welding tool, the support welding tool and the sealing plate welding tool, the stability and accuracy of welding connection are enhanced, the uniformity and consistency of welding are ensured, the overall quality of welding is improved, and the efficiency of welding machining is improved.

[Bearing device with integrated electrical insulation, in particular for an electric motor or machine] This bearing device comprises a bearing 10 provided with a first ring 12 and a second ring 14 capable of rotating relative to each other. The device comprises at least one insulating sleeve 22 mounted on the second ring 14 of the bearing and provided with a bushing 24 and an insulating lining 26 overmolded on the second ring 14 and made of electrically insulating material. The bushing comprises a first axial flange 24a and a second axial flange 24b connected by a central radial core 24c. The insulating lining 26 covers at least the second axial flange 24b, the first axial flange 24a being radially offset relative to the insulating lining 26 on the side opposite the bearing 10. Reference: Figure 3

The utility model discloses an air exhaust ring piece, a process cavity and thin film deposition equipment. The air exhaust ring piece is mounted in a chamber of the process cavity; the air exhaust ring piece comprises an air exhaust lining and an air exhaust ring; the air exhaust lining is installed in the cavity, and an annular lap joint groove is formed in the air exhaust lining. The air exhaust ring is in lap joint in the annular lap joint groove, and an air exhaust channel for connecting the cavity with the outside is formed between the air exhaust ring and the air exhaust lining; a leakage-proof piece is arranged at the joint of the cavity, the air exhaust lining and the air exhaust ring and used for eliminating tolerance clearances at the joint of the cavity, the air exhaust lining and the air exhaust ring so as to guarantee the air tightness of the air exhaust channel. According to the utility model, the tolerance clearance at the joint of the cavity, the air exhaust bushing and the air exhaust ring is eliminated through the leakage-proof piece, so that the air exhaust ring piece has better air tightness in the air exhaust process, and the process is prevented from being influenced by air leakage.

The invention discloses a dry-type bushing fault multi-parameter monitoring method and system, and belongs to the technical field of electrical insulation monitoring. The method comprises the following steps: acquiring collected original sensing data of a key part of the dry-type bushing, performing data normalization processing on the original sensing data, and acquiring sensing data of the key part of the dry-type bushing; extracting feature information in the sensing data of the key part of the dry-type bushing to obtain feature extraction information; performing anomaly detection on the feature extraction information by using an isolated forest anomaly detection mechanism to obtain an anomaly score; and according to the abnormal score, judging whether the dry-type bushing has a fault or not.

The invention discloses an expansion sleeve with low expansion pressure and high external extrusion resistance after expansion. The expansion sleeve comprises chemical components in percentage by weight as follows: 0.04%-0.25% of C, 0.1%-1.0% of Si, 0.5%-1.8% of Mn, 0.02%-0.10% of Nb and Plt. Slt, 150 ppm, Slt; 80 ppm, with the balance being Fe and unavoidable impurities. The production method comprises the following steps: smelting and continuously casting molten steel to obtain a proper casting blank; a pipe blank is produced through hot rolling, and it is ensured that the proper size and a good-plasticity organization structure are achieved; pretreating the hot-rolled pipe blank, wherein the pretreatment comprises acid pickling, cleaning, neutralizing, phosphating and saponifying; cold rolling is conducted to achieve the needed size specification, and high size precision is achieved; heat treatment is carried out, and methods such as annealing or hardening and tempering can be selected to optimize the material performance; and the inner surface is subjected to sand blasting or polishing treatment, and anti-rust measures are taken.

The invention relates to the technical field of ceramic production, and discloses a raw material stirring and mixing device for ceramic processing and a method thereof.The raw material stirring and mixing device comprises a stirrer shell, a motor and a stirring assembly, the motor is installed at the bottom of the stirrer shell, and the stirring assembly comprises a rotating shaft fixedly connected to an output shaft of the motor; supporting rods are fixedly connected to the outer wall of the rotating shaft in an annular array distribution mode, sleeves are fixedly connected to the sides, away from the rotating shaft, of the supporting rods, and stirring blades are fixedly connected to the inner wall of each sleeve in an annular array distribution mode; in the process that the second sleeve reciprocates in the inner cavity of the stirrer shell, the state of the blocking piece is switched between the vertical state and the horizontal state, so that in the process that the second sleeve moves downwards in the stirrer shell, the contact area of the blocking piece to the ceramic raw materials can be reduced, and the ceramic raw materials are uniformly stirred; when the second sleeve moves upwards, the contact area between the blocking piece and the ceramic raw materials can be increased in an overturning and flattening mode, and therefore the ceramic raw materials can be in an upward gushing state under the action of the blocking piece.

The invention belongs to the technical field of semiconductor processing, and particularly relates to a semiconductor cavity high-precision polishing machine which comprises a guide rail base, a motor, a shaft sleeve, a supporting plate, a transmission cylinder and a polishing assembly which are fixedly connected. The grinding assembly comprises a support, a protective shell, a shell, a take-up box, a spliced grinding belt, a supporting roller and an adjusting roller. The adjusting roller pulls the spliced grinding belt, the spliced grinding belt drives the second sliding roller on the supporting roller to slide along the first sliding groove, the size of the grinding assembly is reduced, the grinding assembly can easily stretch into a small-caliber cavity, the operation space of the grinding assembly is increased, and the probability that the grinding assembly collides with the cavity is reduced. While the size of the grinding assembly is reduced, the coarse grain grinding belt is switched to the fine grain grinding belt, the small-caliber cavity is polished through the coarse grain grinding belt, the polishing precision can be ensured, and the situation that the precision of a high-precision device is reduced due to the fact that the surface roughness of the small-caliber cavity is too high is avoided.