92 results about "Ceramic bearing" patented technology

The invention provides a method, a system and a device for detecting surface defects of a ceramic bearing roller. The method comprises the following steps: acquiring an original image matrix and an original point cloud of the surface of the ceramic bearing roller in the same state; preprocessing the original image matrix and the original point cloud to obtain a preprocessed image matrix and a preprocessed point cloud; performing wavelet transform processing on the preprocessed image matrix to obtain a low-frequency multi-scale feature matrix; performing weighted fusion on the low-frequency multi-scale feature matrix and the surface roughness to obtain a multi-modal fusion feature matrix; the surface roughness is obtained based on the preprocessed point cloud; reasoning surface defects of the to-be-detected ceramic bearing roller based on the surface defect detection model to obtain a defect detection result of the surface of the ceramic bearing roller; the surface defect detection model is obtained by training a surface defect detection pre-training model based on the multi-modal fusion feature matrix. The method can improve the identification accuracy and the measurement precision of the ceramic bearing roller surface microdefects.

The utility model discloses a kind of silicon nitride ceramic bearing dynamic balance test tool, belong to dynamic balance test field.A kind of silicon nitride ceramic bearing dynamic balance test tool, including rack and the positioning frame of detachable installation on rack, further include: rotation is installed on the rack gas expansion shaft, wherein, the gas expansion shaft is provided with the driving part for driving gas expansion shaft rotation;At least two groups of laser vibration meter, the laser vibration meter is set on gas expansion shaft upper end, wherein, the laser vibration meter is provided with adjusting member;Positioning frame of sliding connection on the rack;The utility model can realize the quick positioning of multiple silicon nitride ceramic bearings by using gas expansion shaft, subsequently under the driving of driving part, make multiple silicon nitride ceramic bearings rotate, and the position adjustment of multiple laser vibration meters using adjusting member, can realize one-to-one monitoring, to improve silicon nitride ceramic bearing dynamic balance detection quality and efficiency.

This invention relates to an apparatus and method for preparing magnesium alloy wire for arc additive manufacturing by pulsed current-assisted hot drawing with a roller die, belonging to the field of magnesium alloy wire preparation technology. The apparatus includes a pay-off frame, a straightener, a tubular heating furnace, a pulse power supply, a roller die, and a drawing machine. The roller die includes a roller die frame and roller sets. The roller die frame includes an elliptical roller die frame and a circular roller die frame. The elliptical roller die frame contains an elliptical roller set, and the circular roller die frame contains a circular roller set. The rollers of the elliptical and circular roller sets are fixed to the elliptical and circular roller die frames by high-temperature resistant ceramic bearings. This method uses a pulsed current to connect the electrodes to the rollers and the pulse power supply, transmitting the pulsed current to the wire through the rollers. Furthermore, the rollers and wire maintain close contact at all times, avoiding or even eliminating the adverse effects of friction and arcing between the electrodes and wire on the surface quality of the wire during conventional electroplastic drawing.

The application relates to the field of bearing ball preparation, and discloses a forming die and a preparation process of a thermal shock-resistant silicon nitride ceramic bearing ball, which comprises a die base, a DC motor is installed at the top of the die base, a transmission rod is rotationally connected to the top of the die base, a guide rod is fixedly connected to the top of the die base, the output end of the DC motor is fixedly connected with one end of the transmission rod, a guide screw is fixedly connected to one end of the transmission rod, and a sliding frame is threadedly connected to the outside of the guide screw. The die plate is arranged to slide on the top of the mounting base through the sliding T block, and is limited through the limiting block; when the user pushes the push block, the limiting block can be retracted into the limiting body, the die plate can be conveniently disassembled, disassembled and installed, the die plate can be conveniently disassembled, replaced and cleaned, and the problem of inconvenient disassembly and installation of the die plate is solved.

Disclosed is a production process for a ceramic bearing component part (1), in which the process comprises the steps of: providing (S1) a ceramic bearing component part (1) having a naturally generated oxide layer (4) having a first thickness (d1), and at least partially modifying (S2, S3, S4, S5) the naturally generated oxide layer (4) on the surface of the ceramic component (1) and / or of the ceramic material.

The invention provides a medium / long wave dynamic regulation and control filter for an infrared detector. The upper-layer rotatable superstructure unit layer is composed of a lower-layer fixed superstructure unit layer, and the upper-layer rotatable superstructure unit layer is driven by a micro stepping motor to rotate around a central shaft of the silicon nitride ceramic bearing. And multi-band dynamic regulation and control: through rotation of an upper-layer medium, medium wave and long wave dynamic detection of different bands can be realized. Through the design of the resonant ring units and the optimization of geometric parameters, the broadband high transmission of a target wave band and the high suppression of a non-target wave band are realized, the interference of the non-target wave band is filtered out, and the signal-to-noise ratio is improved. According to the invention, a traditional multi-stage optical filter stack or light splitting assembly is abandoned, and multiband filtering and switching are realized through a single metamaterial device. The light source is bonded to a staring type imaging detector (such as a HgCdTe focal plane array) through epoxy resin, additional light path adjustment is not needed, and integration complexity and cost are reduced.

This application relates to the field of ceramic bearings, and in particular to a corrosion-resistant, high-hardness sapphire bearing. A corrosion-resistant, high-hardness sapphire bearing includes a sapphire inner ring, a sapphire outer ring, a cage, ceramic balls, and a dust cover. The cage has a plurality of ball-retaining grooves; the ceramic balls are disposed within the ball-retaining grooves; a grease channel communicating with the ball-retaining grooves is formed on the surface of the cage; the dust cover has an injection hole; and a rubber plug is fixedly connected to the injection hole of the dust cover. In this application, the corrosion-resistant, high-hardness sapphire bearing allows grease to be injected into the surface of the ceramic balls through the injection hole of the dust cover. Specifically, the grease sequentially passes through the injection hole of the dust cover and the grease channel formed by the cage to adhere to the surface of the ceramic balls. Rotating the sapphire bearing evenly disperses the grease across the surface of the ceramic balls, effectively simplifying the grease replenishment process for sapphire bearings.

The application discloses a kind of preparation methods of high wear-resistant ceramic composite bearing, comprising the following steps: S1, raw material gradient premix preparation;S2, gradient green compact forming and furnace loading;S3, magnetron sputtering (SPS) collaborative sintering;S4, ceramic body interface activation treatment;S5, / hydroxyapatite gradient transition layer preparation;S6, precision post-processing and performance detection.The application solves the problem that traditional ceramic bearing causes inner and outer layer performance homogenization due to raw material homogenization mixing, sintering density is insufficient, interface treatment is simple, coating adhesion is weak and easy to fall off, and post-processing precision is low, which makes it difficult to meet the demand of high wear-resistant, high stability and severe working condition.

The utility model relates to the technical field of spray washing towers, and discloses a corrosion-resistant spray washing tower, which solves the problems of poor corrosion resistance and insufficient waste gas treatment of the existing spray washing tower, and comprises a glass fiber reinforced plastic tower body, a gas inlet pipe is arranged at the bottom end of one side of the glass fiber reinforced plastic tower body in a penetrating manner, and a gas outlet pipe is arranged at the bottom end of the other side of the glass fiber reinforced plastic tower body. An exhaust pipe is arranged at the top end of the glass fiber reinforced plastic tower body, an aluminum alloy sprayer is arranged at the top end in the glass fiber reinforced plastic tower body in a penetrating mode, an aluminum alloy dispersion exhaust mechanism is arranged at the bottom end in the glass fiber reinforced plastic tower body, and a first aluminum alloy honeycomb reactor and a second aluminum alloy honeycomb reactor are arranged in the middle in the glass fiber reinforced plastic tower body. The aluminum alloy dispersion exhaust mechanism is composed of a hollow disc, a plurality of air nozzles and a dispersion screen plate, the hollow disc is rotationally connected with the air inlet pipe through a ceramic bearing, the air nozzles are connected to the side edge of the bottom end of the hollow disc, and the air inlet pipe is sleeved with the dispersion screen plate; by means of the spray washing tower, the corrosion resistance can be improved, and meanwhile the waste gas treatment effect is improved.

The invention discloses a bias voltage introduction and vacuum ionization prevention all-dimensional coating tool, and belongs to the technical field of vacuum coating. The tool is mainly composed of a track, a walking mechanism, a planetary workpiece disc assembly, a bias voltage wiring and leading-in mechanism and the like, and the core of the tool is that bias voltage output by a bias voltage power supply can be safely applied to a sample to be plated which is completely isolated from a grounded vacuum chamber in an atmospheric state. Through multiple insulation designs (such as an insulation sleeve and a ceramic bearing), reliable insulation between key components such as a planetary workpiece disc, a fixed rod and a self-rotating rod and a cavity is realized, and vacuum ionization sparking is effectively prevented. The bias voltage is finally applied to the sample through a series of transmission of the bias voltage wiring assembly, the entering mechanism, the introducing autorotation rod mechanism and the like. The traveling mechanism enables the tool to enter and exit the cavity along the track, and bias connection can be automatically switched on and off along with the traveling mechanism. In addition, the planetary workpiece disc adopts a wear-resistant and high-temperature-resistant full-bead bearing steel thrust bearing, so that the height of revolution and rotation parts is reduced, and the utilization rate of a coating space is improved. The coating quality and the automation degree are improved, and high reliability and large load capacity are achieved.

This invention discloses a corrosion-resistant circulating pump with a quick-change seal structure, comprising a base, a pump housing, a motor, and an integrated sealing assembly connecting the pump housing and the motor. An impeller shaft is supported within the pump housing by a ceramic bearing. One end of the impeller shaft is fixed to the impeller, and the other end has a first connecting portion. The integrated sealing assembly includes a sealing housing, an intermediate drive shaft passing through the sealing housing, and a mechanical seal installed between the two. One end of the intermediate drive shaft has a second connecting portion that inserts into the first connecting portion, and the other end is connected to the motor via a coupling. When the mechanical seal needs to be replaced, the integrated sealing assembly along with the intermediate drive shaft can be pulled out as a whole, separating the second connecting portion from the first connecting portion. This invention achieves rapid replacement of the entire sealing assembly. During the replacement process, the impeller shaft and impeller remain stationary, eliminating the need for realignment, significantly shortening maintenance time and improving repair efficiency.

The invention relates to the technical field of dismounting tools, in particular to a ceramic bearing dismounting device which comprises a first clamping assembly and a second clamping assembly. The second clamping assembly can move relative to the first clamping assembly in the axial direction of the main shaft; the second clamping assembly comprises a fixing base, a first clamping jaw, a second clamping jaw, a first connecting rod, a second connecting rod and a driving mechanism. The first connecting rod and the second connecting rod are rotationally connected with the fixing base, the two ends of the first connecting rod are connected with the first clamping jaw and the driving mechanism correspondingly, and the two ends of the second connecting rod are connected with the second clamping jaw and the driving mechanism correspondingly. When the driving mechanism drives the first connecting rod and the second connecting rod to rotate, the first clamping jaw and the second clamping jaw are driven to move oppositely so as to clamp the ceramic bearing, or the first clamping jaw and the second clamping jaw are driven to move oppositely so as to loosen the ceramic bearing. Clamping grooves matched with the ceramic bearing are formed in the first clamping jaw and the second clamping jaw; and the displacement driving assembly is connected with the second clamping assembly. The device can reduce the damage risk when the ceramic bearing is disassembled.

A single-screw water-lubricated sliding bearing testing device comprises a water tank (1) and a casing (2) located on the upper portion of the water tank, and is characterized in that an upper bearing seat (3) is mounted on the upper portion of the casing, a lower bearing seat (4) is mounted on the lower portion of the casing, sliding bearing static rings (5) are mounted in the upper bearing seat and the lower bearing seat, and the upper end and the lower end of a spindle (6) are mounted in the sliding bearing static rings. The sliding bearing moving ring (7) is sleeved on the main shaft; a wave spring (8) is additionally arranged on the main shaft; the outer side of the loading disc (9) abuts against a corresponding axial ceramic bearing (10) and a corresponding radial ceramic bearing (11) in the circumferential direction and the axial direction respectively, a main shaft synchronous belt wheel (14) is installed on the main shaft and connected with a driving synchronous belt wheel (16) through a synchronous belt (15), and the driving synchronous belt wheel (16) is installed on an output shaft of a servo motor (17). The device is convenient to test, low in overall cost and low in operation energy consumption.

The invention relates to the field of bearings, in particular to a light ceramic bearing and a manufacturing method thereof.The light ceramic bearing comprises an inner ring, an outer ring, a retainer and ceramic balls, the inner ring and the outer ring are both made of C / C-SiC ceramic materials, and the C / C-SiC ceramic materials comprise hyperbranched polycarbosilane, divinyl benzene, xylene, carbon fibers, phenolic resin and silicon powder; the C / C-SiC ceramic material has a skeleton network structure formed by carbon fibers and a SiC matrix wrapping fiber bundles of the skeleton network structure, the SiC matrix is obtained by reaction and conversion of hyperbranched polycarbosilane and silicon powder permeating into the skeleton network structure and carbon, and pores of the SiC matrix are filled with free carbon; the manufacturing method comprises the following steps: preparing the bearing ring from the hyperbranched polycarbosilane, the divinyl benzene, the xylene, the carbon fiber and the silicon powder, and assembling the bearing by a cold charging method. The inner ring and the outer ring are made of C / C-SiC ceramic composite materials, the ceramic balls are made of Si3N4 ceramic materials, the retainer is made of polytetrafluoroethylene materials, and a bearing structure with complementary performance is formed.

The impeller comprises a hub, a rear cover plate and a plurality of blades, the hub is coaxially arranged on the rear cover plate, and the blades are evenly distributed on the rear cover plate around the axis of the hub; the front ends of the blades are close to the axis of the hub, the rear ends of the blades are far away from the axis of the hub, the rear half sections of the blades are provided with flow guide wings, and the flow guide wings incline downwards in the rotating direction of the impeller. According to the embodiment of the utility model, the inclined flow guide wings are arranged on the blades, so that when the impeller rotates for air intake, an inclined outward resistance is generated to air sucked into the impeller, meanwhile, the air forms a counter-acting force opposite to the resistance to the flow guide wings, and the counter-acting forces of all the flow guide wings are superposed; therefore, force which can push the impeller inwards along the axial direction of the impeller is formed, so that the effect of reducing or offsetting the axial force borne by the motor main shaft is achieved, the abrasion of the ceramic bearing is reduced, and the service life of the bearing is prolonged.

This invention discloses a dual-function cage structure for ultra-high temperature, high-speed all-ceramic ball bearings, belonging to the field of all-ceramic bearing technology. The cage is made of silicon nitride, silicon carbide, or zirconium oxide and includes a guiding structure and a lubrication and protection structure. The guiding structure is an arc-shaped fitting pocket for high-precision guidance. The lubrication and protection structure consists of an annular lubrication storage cavity, a gradient aperture slow-release channel, and a capillary transport structure connected in sequence to form a synergistic lubrication system, which can suppress high-temperature volatilization, overcome centrifugal oil spillage, provide quantitative slow release, and ensure precise oil supply. This invention achieves dual-function coupling of guidance and lubrication, reducing the friction coefficient by ≥35% and increasing service life by ≥60%. It is suitable for ultra-high temperature, high-speed, and extreme operating conditions in aerospace, high-end equipment, and other fields, and has high engineering application value.

The utility model belongs to the technical field of ceramic bearings, and particularly relates to a ceramic bearing feeding device which comprises a shell. A feeding channel is arranged in the shell and comprises a first channel, a second channel and a third channel; a feed port is formed in one end of the second channel, and a discharge port is formed in one end of the third channel; a stop block is detachably arranged at the bottom of the third channel; the first driving device is arranged at one end, far away from the stop block, in the first channel in a penetrating manner; the second driving device is arranged at the end, away from the discharging port, of the third channel in a penetrating mode. By arranging the first driving device and the second driving device, the ceramic bearing can be pushed to move in the feeding channel, so that the ceramic bearing is conveyed out from the discharging opening, the feeding process is completed, manual feeding is omitted, and the production efficiency is improved; and by arranging the detachable stop block, when the interior of the feeding channel is blocked, the stop block can be detached, and the interior blockage can be dredged.

The invention discloses a cable plugging member, which comprises an insulating shell integrated with a plastic insulating member and a conductive core, the conductive core part located in the insulating shell is arranged to be a twisted section, and the twisted section forms movable push-pull on the two end parts of the conductive core through twisting. An insulating rod is fixedly connected to the insulating block on the twisted section, and the middle part of the insulating rod is assembled with a ceramic bearing on the plastic insulator. The beneficial effects of the invention are that the twisting section connected by the insulating rod and the insulating block is twisted by twisting the insulating rotating handle in the forward or reverse direction to form backward pulling of the two ends of the conductive core, and the two ends of the conductive core are automatically reset by means of the elastic reset of the twisting section after loosening, so that the effect of pushing and pulling the plugging elements at the two ends of the conductive core is achieved; according to the utility model, the compensation acting force can be applied to the plugging part, the firmness of the plugging part is ensured, the conduction can be conveniently cut off when the two ends of the cable plugging part are not pulled out, and the safety of the plugging operation is improved.

The invention relates to the field of copper wire equipment, and discloses a winding and packaging device for copper wire production and manufacturing, which comprises a rotary reciprocating mechanism positioned on a traction driving mechanism, and is matched with a main fixing table and a linkage rotating shaft to limit the reciprocating operation of a bearing softening mechanism; the feeding extension mechanism is located on the bearing softening mechanism and matched with the input pipeline and the high-temperature tank to be used for feeding, conveying and extending copper wire raw materials. And the output winding mechanism is located on the bearing softening mechanism, is matched with the side sealing ring and is used for outputting and winding processed finished products. A linkage gear ring reverse driving technology is adopted, stable heat conduction of a copper wire in a thermoplastic critical temperature interval is guaranteed through the composite action of centrifugal force and Coriolis force, a pi-shaped suspension structure of an unwinding roller frame is matched with a ceramic bearing to guide an inner groove roller, static feeding and dynamic tank physical isolation are achieved under the working condition that a high-temperature tank rotates, and the mechanical performance of the high-temperature tank is improved. And surface oxidation of copper wire raw materials caused by mechanical friction is avoided.

The utility model relates to the field of ceramic bearings, in particular to a ceramic bearing with a dust cover convenient to disassemble and assemble. The utility model relates to a ceramic bearing with a dust cover convenient to disassemble and assemble, which comprises a ceramic inner ring, a ceramic outer ring, a retainer arranged between the ceramic inner ring and the ceramic outer ring, a ceramic ball arranged between the ceramic inner ring and the ceramic outer ring, and a dust cover, an inner arc-shaped limiting groove is formed in the peripheral side surface of the inner ring groove of the ceramic inner ring; an outer ring groove is formed in the side face of the ceramic outer ring, and an outer arc-shaped limiting groove is formed in the circumferential side face of the outer ring groove of the ceramic outer ring. And the dustproof cover is detachably connected between the inner arc-shaped limiting groove of the ceramic inner ring and the outer arc-shaped limiting groove of the ceramic outer ring. The dustproof cover of the ceramic bearing can be quickly disassembled and assembled and is convenient to disassemble, assemble and maintain.

The invention discloses a ceramic bearing device for thin glass processing and a ceramic supporting strip preparation method, the ceramic bearing device for thin glass processing comprises a plurality of ceramic supporting strips and a supporting frame, the ceramic supporting strips are vertically arranged, and the plurality of ceramic supporting strips are arranged in parallel; the ceramic supporting strip comprises a continuous ceramic line, and the diameter of the ceramic line is 1-2 mm. The ceramic line is provided with a plurality of first arc-shaped ceramic line segments, every two adjacent first arc-shaped ceramic line segments are connected through a connecting part, and each connecting part comprises a horizontal ceramic line segment or a second arc-shaped ceramic line segment. The first arc-shaped ceramic line segment is of an arc-shaped structure; the arc-shaped ceramic line segment is of an arc-shaped structure; the ceramic support strip is prepared by integral forming; the prepared ultra-thin glass bearing device is resistant to acid and alkali corrosion and stable at high temperature, and the supporting strips used for bearing ultra-thin glass are integrally formed and long in service life.

The utility model relates to a gear pump, in particular to an integral ceramic shaft sleeve gear pump which comprises a plate assembly, a first rotating shaft, a second rotating shaft and four bearing sleeves, one end of the first rotating shaft and one end of the second rotating shaft are matched with two of the bearing sleeves, and the other end of the first rotating shaft and one end of the second rotating shaft are matched with two of the bearing sleeves. The other end of the first rotating shaft and the other end of the second rotating shaft are both matched with the other two bearing sleeves, the bearing sleeves are ceramic bearings, and therefore the wall face bearings are blocked. Meanwhile, a first flow guide groove, a plurality of second flow guide grooves and a plurality of third flow guide grooves are formed in the inner wall of the bearing sleeve so that fluid materials can lubricate the end of the first rotating shaft or the end of the second rotating shaft. According to the utility model, the advantages of convenient lubrication, difficulty in locking and high practicability can be realized by effectively utilizing the self structural configuration.

This invention provides a method, system, and apparatus for detecting surface defects on ceramic bearing rollers. The method includes: acquiring an original image matrix and an original point cloud of the ceramic bearing roller surface under the same conditions; preprocessing the original image matrix and the original point cloud to obtain a preprocessed image matrix and a preprocessed point cloud; performing wavelet transform processing on the preprocessed image matrix to obtain a low-frequency multi-scale feature matrix; weighted fusing the low-frequency multi-scale feature matrix and surface roughness to obtain a multi-modal fusion feature matrix; the surface roughness is obtained based on the preprocessed point cloud; inferring the surface defects of the ceramic bearing roller to be detected based on a surface defect detection model to obtain the defect detection result of the ceramic bearing roller surface; and training the surface defect detection model based on the multi-modal fusion feature matrix to obtain a pre-trained surface defect detection model. This invention can improve the accuracy and measurement precision of identifying micro-defects on the surface of ceramic bearing rollers.

The invention discloses a silicon nitride ceramic bearing ball detection device which comprises a box body, an upper clamping disc and a lower clamping disc, and further comprises a plurality of sliding pipes, probes are arranged on the sliding pipes in a sliding mode, push blocks are arranged on the sliding pipes in a sliding mode, pressure springs are arranged between the push blocks and the probes, and the two ends of the pressure springs are fixedly connected with the push blocks and the probes respectively. When bearing balls of different sizes are detected, a plurality of probes can abut against the bearing balls, after abutting, a plurality of sliding pipes are limited and fixed through a lifting assembly, and meanwhile, a pressing spring is limited through sliding of a push block, so that certain abutting force exists between the probes and the bearing balls, and the detection accuracy is improved. The bearing ball detection device can detect a plurality of positions of bearing balls with different sizes, and can also enable the abutting force between the probe at each position and the bearing ball to be the same, thereby not only improving the detection efficiency of the bearing ball, but also improving the detection accuracy.

The invention discloses a preparation method of a high-wear-resistance ceramic composite bearing. The preparation method comprises the following steps: S1, raw material gradient premixing preparation; s2, gradient green body forming and charging; s3, performing magnetic control SPS (spark plasma sintering) cooperative sintering; s4, activating the interface of the ceramic body; s5, preparing a / hydroxyapatite gradient transition layer; and S6, performing precise post-treatment and performance detection. The method solves the problems that the traditional ceramic bearing is difficult to meet the requirements of high-wear-resistance and high-stability harsh working conditions due to the fact that the inner and outer layers are homogenized due to homogenized mixing of the raw materials, the sintering compactness is insufficient, the coating is weak in binding force and easy to fall off due to simple interface treatment, and the post-treatment precision is low due to the fact that the coating cannot meet the requirements of high-wear-resistance and high-stability harsh working conditions.

The magnetic driver comprises an outer bearing seat, a machine frame and a bearing seat which are fixedly connected, a transmission shaft penetrates through the bearing seat and the machine frame, a full-ceramic bearing is arranged at the upper end in the bearing seat, a radial magnetic suspension bearing is arranged at the lower end in the bearing seat, a magnetic transmission part is arranged at the upper end of the transmission shaft, and a magnetic bearing is arranged at the lower end of the transmission shaft. The upper end of the bearing seat is provided with an inflow port, the lower end of the bearing seat is provided with an outflow port, the upper end in the bearing seat is provided with a cleaning fluid distributor, the cleaning fluid distributor is communicated with the inflow port, and a runner is arranged in the rack; through the combination of the full-ceramic bearing and the radial magnetic suspension bearing which are arranged inside and the circular arc transition design of the internal flow channel, no dead angle of the flow channel is realized, so that the cleaning and sterilization of the driver are effectively realized, the driver can adapt to special industries needing highly clean and sterile environments, and the service life of the driver is prolonged. And the practicability of the device is improved.

The utility model relates to a novel extraction bearing device, which belongs to the technical field of diaphragm production, and comprises: a hydrostatic bearing assembly, which is composed of an inner ring and an outer ring, and a gap is arranged between the inner ring and the outer ring; the bearing medium supply system is used for injecting a pressurized liquid medium into the gap; and the power transmission assembly transmits power to the extraction roller through a non-contact coupling. The hydrostatic bearing assembly is adopted to replace a traditional ceramic bearing, a pressurized liquid medium is injected into the gap through the bearing medium supply system to serve as a bearing medium, a rolling body structure is eliminated, and the problems that the ceramic bearing is fragile and poor in bearing capacity are solved. In addition, non-contact driving of the power transmission assembly is achieved through a magnetic coupling, reduction of mechanical abrasion is facilitated, and the service life of the device is prolonged conveniently.

This utility model provides a magnetic levitation low-friction dual-hub device suitable for heavy-duty medical equipment, belonging to the technical field of hub devices. This magnetic levitation low-friction dual-hub device for heavy-duty medical equipment includes an outer load-bearing hub, an inner drive hub, radial ceramic bearings, and an axial magnetic levitation module. The outer load-bearing hub is sleeved on the outside of the inner drive hub. The radial ceramic bearings are disposed between the outer load-bearing hub and the inner drive hub, and are connected to the inner wall of the outer load-bearing hub and the outer wall of the inner drive hub, respectively. The axial magnetic levitation module is disposed at the end of the outer load-bearing hub away from the radial ceramic bearings, and is connected to the end of the outer load-bearing hub. This invention solves the problems of high friction coefficient, high movement resistance, heavy operating burden for medical personnel, and difficulty in meeting the frequent movement requirements of traditional heavy-duty medical equipment hub systems.

The present invention relates to the technical field of bearing life calculation, and discloses a fatigue life calculation method and device for a ceramic ball hybrid bearing. The method calculates the maximum contact stress of any ceramic bearing ball of the target ceramic ball hybrid bearing based on the bearing type of the target ceramic ball hybrid bearing and the maximum normal force borne by any ceramic bearing ball and the bearing ring of the target ceramic ball hybrid bearing. If the maximum contact stress between any ceramic bearing ball and the bearing ring of the target ceramic ball hybrid bearing is less than a preset stress threshold, the remaining fatigue life of the target ceramic ball hybrid bearing is calculated based on the external load of the bearing ring of the target ceramic ball hybrid bearing, the average remaining life correction factor of the target ceramic ball hybrid bearing, and the remaining life temperature correction factor of the target ceramic ball hybrid bearing. Because the present invention takes into account the ambient temperature of the target ceramic ball hybrid bearing, it can accurately calculate the remaining fatigue life of the target ceramic ball hybrid bearing and meet practical needs.

The utility model belongs to the technical field of water pumps, in particular to a bearing structure of a submersible pump for a well, which comprises a bearing seat and a ceramic shaft sleeve circumferentially fixed and sleeved on a rotating shaft, a ceramic bearing is rotatably sleeved outside the ceramic shaft sleeve, and an elastic sleeve fixedly mounted with the bearing seat is sleeved outside the ceramic bearing. The outer side wall of the ceramic bearing is an outer convex spherical surface, and the inner side wall of the elastic sleeve is an inner concave spherical surface matched with the outer convex spherical surface. According to the utility model, the coaxiality and perpendicularity of each ceramic bearing can be effectively ensured, the abrasion is effectively delayed, and the service life is prolonged.