39results about How to "Reduce eccentricity" patented technology

The invention belongs to the technical field of aero-engines, and discloses a centrifugal impeller and an aero-engine rotor. The centrifugal impeller comprises an impeller body, a centrifugal switching section and a fastener; a connecting part is arranged on the side, close to the gas turbine disc, of the impeller body, the centrifugal switching section comprises an impeller switching part and a turbine switching part which are fixedly connected, an annular spigot is formed in the side, close to the impeller body, of the impeller switching part, and outer teeth are arranged on the outer side of the impeller switching part in the circumferential direction; the connecting part is fixedly connected with the impeller switching part through a fastener, the connecting part is located in the spigot, a positioning surface for radially positioning the impeller body is arranged in the spigot, and end teeth are arranged at the end, away from the impeller body, of the turbine switching part. The centrifugal impeller is provided with the centrifugal switching section, the impeller body and the centrifugal switching section can be made of different materials, the centrifugal switching section is made of high-temperature alloy, the abrasion resistance of the rear end teeth of the centrifugal impeller can be effectively improved, end tooth bonding is prevented or relieved, and the problems of end tooth bonding and disc body abrasion of the centrifugal impeller are solved.

The present invention relates to the field of centrifuge structure, and specifically discloses a roll frame for a high-g value three-degree-of-freedom centrifuge, comprising a frame, wherein the frame is an octagonal annular cavity surrounded by an outer skin outer ring, an inner skin inner ring and a cover plate; the frame is symmetrically provided with two roll axis mounting holes, wherein a small shaft sleeve is provided in the roll axis mounting hole, and the side wall of the frame perpendicular to the line connecting the two roll axis mounting holes is provided with two pitch axis mounting holes, wherein a large shaft sleeve is provided in the pitch axis mounting hole; and a plurality of threading tubes are provided in the cavity between the outer skin and the inner skin. The advantages of the present invention are that the roll frame's outer shape structure, box cross-sectional structure, local structure and wiring method are improved and designed to improve the roll frame's overload resistance, rigidity and load-bearing capacity, and reduce the eccentricity of the roll frame, so that it can be used in a high-g value three-degree-of-freedom centrifuge.

The invention relates to the technical field of straightening equipment, and discloses an automatic matching straightening machine for shaft workpieces, which comprises a machine body, a plurality of linear sliding rails for a plurality of mechanisms to linearly move are arranged on the machine body, and strip-shaped tooth grooves matched with moving gears are formed in the two sides of the interior of the machine body; one side of the machine body is provided with a PLC (Programmable Logic Controller) control cabinet for calculating input shaft workpiece data information and generating a control signal, and the PLC control cabinet is used for controlling each mechanism on the machine body in an operation process. By adding and arranging the movable detection mechanism, when the shaft workpiece is straightened, the movable detection mechanism adopts a lever type detection structure, can be tightly attached to the surface of the shaft workpiece, sensitively captures bending deformation information of the workpiece, realizes accurate acquisition of deformation, avoids subjectivity and errors of manual detection, and improves the straightening accuracy of the shaft workpiece. And full-length movement detection can be realized along a linear sliding rail, all parts of the shaft workpiece are covered, and the condition of missing detection of a deformation position is avoided.

A motor iron core stator and rotor large rotation die comprises a fixedly-arranged supporting sleeve and a rotation sleeve rotationally connected to the supporting sleeve with the vertical direction as the axis, a die is arranged on the rotation sleeve, the motor iron core stator and rotor large rotation die further comprises a rotation gear, a transmission assembly and a rotation motor, and the rotation gear and the rotation sleeve are mutually connected and coaxial. The transmission assembly comprises a transmission gear, a synchronous belt wheel and a transmission belt, the transmission gear and the synchronous belt wheel are connected with each other and are coaxial with each other, the rotation gear is meshed with the transmission gear, the transmission belt is connected to the synchronous belt wheel in a winding mode, and the output end of the rotation motor acts on the transmission belt. According to the scheme, the problem of single-side abrasion between the rotary sleeve and the supporting sleeve due to the tension effect of the transmission belt is effectively solved, the eccentric degree of a mold on the rotary sleeve is weakened, and various problems caused by mold eccentricity are further solved.

The invention provides a support-free mounting structure of a laminated beam and a laminated slab and a mounting method of the support-free mounting structure, and belongs to the field of fabricated buildings. The support-free mounting structure comprises a laminated beam prefabricated part, a laminated slab prefabricated part and an adjustable opposite-pulling mold; two ends of the superposed beam prefabricated part are arranged on the main body structure; the adjustable opposite-pulling mold comprises two sets of pouring molds and opposite-pulling pieces, the two sets of pouring molds are oppositely pulled on the two sides of the prefabricated part of the superposed beam through the opposite-pulling pieces and support the prefabricated part of the superposed beam, and the two sets of pouring molds and the prefabricated part of the superposed beam form a pouring space of the post-pouring part of the superposed beam; the two ends of the pouring mold are supported on the main body structure; the prefabricated part of the laminated slab is placed on the top of the pouring mold. The thickness of the prefabricated part of the superposed beam can be greatly reduced by oppositely pulling the adjustable opposite-pulling dies on the two sides of the prefabricated part of the superposed beam, and due to the fact that the bending resistance of the dies is far larger than that of the prefabricated part of the superposed beam, the dies can make up for insufficient rigidity of the superposed beam and reduce the dead weight of the prefabricated part of the superposed beam, and the thickness of the prefabricated part of the superposed beam is only about 200 mm.

The utility model belongs to the technical field of power tool turrets, and particularly relates to a numerical control machine tool slant bed power tool turret turning and milling composite machine tool which comprises a numerical control turning and milling composite machine tool body, a power tool turret is arranged on the inner wall of the numerical control turning and milling composite machine tool body, and a motor installation groove is formed in the inner wall of the power tool turret. Servo motors are installed on the inner wall of the power tool turret, one servo motor is installed on the inner wall of the motor installation groove, a thermal shrinkage tool handle is installed at the output end of the servo motor, and a tool bit is movably connected to the inner wall of the thermal shrinkage tool handle. By arranging the thermal shrinkage cutter handle and utilizing the principle of thermal expansion and cold contraction, the cutter head is installed during heating and tightly held after cooling, vibration transmission can be reduced, the machining precision can be improved, errors can be automatically compensated, the coaxiality is ensured, the service life of the cutter head is prolonged, the surface quality is improved, the clamping force is higher, the cutter head can be effectively prevented from loosening, and the machining yield of fragile materials is improved.

The invention relates to the technical field of heat preservation pipes, in particular to a polyurethane heat preservation pipe heat preservation layer manufacturing process which comprises the following steps that S1, a conveying pipe penetrates through a protection pipe, the two ends of the protection pipe are connected with the conveying pipe through a support, and the protection pipe and the two ends of the conveying pipe are in a concentric state; the material injection opening is formed in the protection pipe, and then the fixing frame is arranged on the conveying pipe. The outer wall of the protection pipe is fixed after pipe penetrating, so that the problem that the thickness of a manufactured heat preservation layer is not uniform due to the fact that the protection pipe is eccentric due to the fact that the protection pipe collapses under the action of gravity is avoided, and therefore on the premise that the use of a wood block support is reduced, the concentricity of the protection pipe and the conveying pipe can still be guaranteed, and the uniformity of the heat preservation layer is guaranteed; in this way, the service life of the polyurethane thermal insulation pipe is prolonged, use of wood block supports is reduced, pipe penetrating can be more convenient, and the manufacturing efficiency of a thermal insulation layer of the polyurethane thermal insulation pipe is effectively improved.

The utility model discloses a cable shielding net cutting and overturning mechanism which comprises a driving assembly, a workbench, a holding assembly, a positioning assembly, an overturning assembly and a cutting assembly. The holding assembly, the positioning assembly, the overturning assembly and the cutting assembly are sequentially arranged in the length direction of the workbench. The driving assembly is used for driving the cutting assembly and the overturning assembly to do reciprocating motion in the length direction of the workbench, the cable is jointly kept in the horizontal state through the holding assembly and the positioning assembly so that the steps of cutting and overturning the shielding net can be carried out subsequently, and the positioning assembly comprises a wire clamping and supporting device. According to the cable shielding net cutting and overturning mechanism, when the cutting and overturning process steps of the shielding net are carried out, the cable can be always in a horizontal state through the cable clamping and supporting device, the situation that the cable is eccentric is reduced, the efficiency of the cutting and overturning process of the cable shielding net is improved, the operation difficulty is reduced, and the working efficiency of the cable shielding net is improved. And the cable production quality is improved.

The invention provides a stator outer diameter roundness detection mechanism and method based on internal expansion type positioning, and relates to the technical field of precision measurement, the stator outer diameter roundness detection mechanism comprises a base station, a rotation driving module, a product positioning module, a lifting driving module and a detection module, the product positioning module adopts an internal expansion type mechanism composed of a top column, a positioning block and a wedge block group, the wedge block group is driven to radially tighten the inner hole of the stator through the axial movement of the top column, so that different inner diameter tolerances are adapted, high-precision and non-eccentric positioning is realized, during detection, the lifting driving module drives the plurality of contact displacement sensors to move along the axial direction of the stator and scan the outer diameter contour of the stator iron core unit, and meanwhile, the rotating driving module is used for indexing, so that the detection precision is improved. According to the invention, automatic and high-efficiency detection of the outer diameter roundness of all stator core units is realized, the problems of inaccurate positioning and poor universality of a traditional jig are effectively solved, and the detection precision and efficiency are remarkably improved.

A non-submerged cavitation-erosion synergistic damage simulation device, system and method belong to the field of hydraulic machinery working condition simulation, including a sediment jet channel and a cleaning fluid channel in its periphery; high-speed sand-containing fluid is introduced into the sediment jet channel to form a central high-speed jet impacting the sample surface, high-speed cleaning fluid is introduced into the cleaning fluid channel to form a peripheral low-speed water curtain surrounding the central high-speed jet after being ejected from the annular steady flow pipe, and the peripheral low-speed water curtain impacts the sample surface to form a local liquid phase confining pressure zone together with the central high-speed jet. The present application not only realizes the true simulation of the actual working condition under non-submerged conditions, but also can adjust the flow and pressure of the cleaning fluid to adjust the cavitation number and cavitation collapse intensity around the high-speed sand-containing jet without changing the atmospheric environmental pressure, and quickly adjust the simulation test parameters.

The utility model discloses a lens processing fixing device, including the bottom plate, the bottom plate is fixedly connected with the support, the support rotationally connected with the rotation cover, the rotation cover is fixedly connected with the support block, the support block rotationally connected with two rotators, the support is fixedly connected with the motor, the output shaft of motor is fixedly connected with the gear no.

The present application belongs to the technical field of grain fumigation, and particularly relates to a granary medicine feeding machine, which comprises a base plate, a rack fixed on the base plate, a lifting seat in sliding guide cooperation with the rack, a lifting driving mechanism installed on the rack, an outer pipe body vertically downwardly extending through the base plate, an inner pipe body sleeved in the outer pipe body and abutting against the inner bottom end of the outer pipe body, and a connecting mechanism installed on the lifting seat and connected with the top of the inner pipe body. The present application can reduce the resistance of pipe body insertion into the grain pile, reduce the grain occupation of the medicine feeding space and the pipe body blockage, improve the stability of the outer pipe body embedding depth and position, and is beneficial to the release of fumigant in the grain pile according to the predetermined position, so as to realize the fumigation effect.

The utility model relates to the technical field of lens assembly, in particular to an automatic assembly machine for a mobile phone lens, which is connected with a motor, drives the assembly machine to move back and forth through the motor, and comprises a cylinder, a piston, a connecting piece, a fixing piece and a floating joint, the outer side of the upper end of the air cylinder is fixedly connected with a fixing piece. The connecting piece is provided with a through communicating hole, the lower tail end of the floating connector penetrates through the communicating hole of the connecting piece from top to bottom and is arranged in the communicating hole, the lower end of the connecting piece is provided with a connecting supporting rod, the free end of the piston is provided with an axial connecting hole, and the connecting supporting rod of the connecting piece penetrates through the connecting hole and is connected with the piston; when the structure operates, the air cylinder and the connecting piece work stably, the effects of reducing errors, protecting related parts, maintaining stable operation of equipment and prolonging the service life of the equipment can be achieved, and the structure further has the advantages of being small in size, easy to install, high in durability, high in pressure resistance and the like.

This invention discloses an H-beam positioning device and method for SMW (Self-Mixed Mixing) piles. A guide trench is formed in the soil at the top of the SMW pile, with its centerline aligned with the centerline of the SMW pile. The SMW pile includes multiple mixing piles evenly distributed in the soil at the bottom of the guide trench for inserting H-beams. The H-beam positioning device comprises multiple positioning device bodies, each including a positioning frame, at least two markers, and at least two observation points. This invention uses variable-length connecting rods and fixing bolts to connect multiple positioning device bodies into a single unit, accommodating various H-beam insertion methods. The observation points, in conjunction with the markers, monitor the position of the H-beams during insertion, reducing the probability of eccentricity. It eliminates the need to move individual positioning device bodies to the next H-beam insertion point after the current H-beam is completed, thus improving construction efficiency.

The present application relates to the field of building structure energy dissipation construction, and discloses a method for hoisting viscous damping wall without support, which is suitable for concrete structure wall; the method comprises the following steps: determining two bearing holes on the concrete structure wall above the installation opening, setting bearing pull rods in the bearing holes, and forming detachable bearing connection through wall surface pressure bearing parts; setting adjustable hanging seats on the side of the bearing pull rods facing the installation opening, and adjusting the position of the upper lifting point in the wall thickness direction; setting lower guide supporting seats at the lower embedded steel plates; connecting two lifting parts with the adjustable hanging seats and the hoisting connection parts of the viscous damping wall respectively, setting synchronous differential parts, and then synchronously lifting the viscous damping wall; guiding the lower end of the viscous damping wall to laterally enter the position through the lower guide supporting seats, and completing correction, temporary fixation and welding fixation in the semi-unloading correction state. The method does not need to set up floor support, and can improve the stability of the viscous damping wall hoisting, positioning and welding before positioning in the narrow opening.

The utility model discloses elevator speed governor action speed detection platform, including quick locking assembly, quick locking assembly includes concave strip and convex strip, the outer ring of main shaft rod four -around fixed installation concave strip, the outer ring of external connection axle four -around fixed connection convex strip, convex strip protruding end activity joint concave strip groove end, quick locking assembly still includes rectangular groove, dismounting spring, clamping block and clamping groove, the middle part of convex strip is seted up rectangular groove, and dismounting spring and clamping block are connected in rectangular groove, and clamping block is located above dismounting spring, and the middle part of concave strip is seted up clamping groove, and clamping block is connected in clamping groove. The utility model can guarantee the concentricity of main shaft rod and external connection axle through the accurate matching of geometric shape, reduce the eccentric problem of shafting caused by bolt hole error or uneven assembly, reduce additional radial force and vibration, make motor output speed more stable, thereby improve the precision of speed governor action speed detection.

The utility model relates to the field of expansion shaft, concretely to a pure mechanical type expansion shaft, it includes an expansion mandrel, the multiple sector expansion sheets that the sector expansion sheet radial position is limited to the positioning sleeve of installation in the expansion mandrel end portion and even distribution about the circumferential direction of expansion mandrel, the snap spring of setting at the both ends of expansion mandrel and limiting the axial movement of sector expansion sheet, and the tension spring of being sleeved on the multiple sector expansion sheets and being used to restore the inward contraction of sector expansion sheet, the multiple eccentric circular arc structure surfaces that the circumferential direction is even set on the outer peripheral wall of expansion mandrel, drive the multiple sector expansion sheets to outward unfold or inward contract through the rotation of eccentric circular arc structure surface and the contraction force of tension spring. Therefore, the utility model discloses a mechanical type self -adaptation expansion, effectively solved the positioning failure problem of welding and the machining in the tolerance, and has the precision and efficiency advantage.

This invention relates to the field of land consolidation and development technology, and in particular to a land leveling device and method with adjustable functions. The leveling method involves first determining a reference horizontal plane, then dividing the farmland into m*n blocks. The bucket passes through n rows of farmland sequentially along a first direction, recording the distances h1 to hn between the reference horizontal plane and the blade. Based on the data h1 to hn, the average distance h between the blade and the reference horizontal plane when in n rows of farmland is obtained. Δh is measured based on the soil volume in the bucket and the farmland area. (h-Δh) is the distance between the target leveling surface and the reference horizontal plane. The bucket height is adjusted to maintain the distance (h-Δh) between the blade and the reference horizontal plane. The process continues along a second direction, passing through m rows of farmland sequentially, completing the farmland leveling. The leveling method provided by this invention facilitates the determination of the target leveling surface and is more conducive to agricultural cultivation and irrigation drainage.

The utility model discloses a cast aluminium rotor broken strip testing arrangement belongs to testing technical field, including test platform, cast aluminium rotor broken strip testing arrangement still includes test subassembly and drive assembly, and test subassembly is located with drive assembly in test platform, and test platform includes workbench surface, and test subassembly and drive assembly are located workbench surface upper and lower two sides respectively, and test subassembly includes positioning subassembly, detection subassembly and clamping assembly, and the plane of clamping assembly is perpendicular to the plane of workbench surface, and rotor is located in clamping assembly, and detection subassembly is located one side of clamping assembly, and the plane of clamping assembly is perpendicular with the plane of positioning subassembly each other. The gravity direction is consistent with rotor axial direction through the vertical arrangement of clamping assembly in test platform, and rotor is naturally drooping under the action of gravity, and reduces the additional eccentricity or sway of the gravity, and compared with horizontal arrangement, can reduce the rotor unbalance influence of the factor such as installation, improves test stability.

The application discloses a kind of multi-physical field experimental devices for strong magnetic field, it is related to strong magnetic field technical field, including bearing assembly, pneumatic stirring assembly, reaction bottle fixing assembly and photo-thermal liquid bath component;Bearing assembly includes bearing frame and lifting mechanism, pneumatic stirring assembly includes air supply equipment, flexible air pipe, turbine, planetary reducer and stirring paddle, reaction bottle fixing assembly includes fixed frame structure and reaction bottle, photo-thermal liquid bath component includes outer bushing, heat equalizing cylinder, heating film, quartz window, light source and radiator.The application has the advantages that the reaction area can be accurately adjusted to the target magnetic field strength and magnetic field gradient position by precise positioning and lifting, and the illumination, heating and stirring can be cooperatively loaded and relatively independently controlled in the local reaction bottle, so as to meet the stable operation and rapid sampling requirements of multi-physical field reaction experiment under strong magnetic field extreme environment.

The utility model relates to the technical field of flange machining equipment, in particular to a rapid clamping tool for flange detection, which comprises a workbench, a detection table is arranged on the workbench, the detection table is located at the center position of the workbench, movable seats are arranged on the workbench in a sliding manner, the movable seats are respectively arranged on two opposite sides of the workbench, and the movable seats are arranged on the workbench. The workbench is provided with a driving assembly used for driving the two movable seats to be close to or away from each other, the movable seats are provided with clamping blocks, the clamping blocks are located on the opposite side walls of the two movable seats, elastic buffering assemblies are arranged between the movable seats and the clamping blocks, the clamping blocks are provided with V-shaped grooves, and the V-shaped grooves are located in the V-shaped grooves. The V-shaped grooves are located in the opposite side walls of the two clamping blocks. The flange fixing device has the advantages that the problems of poor repeated positioning and insufficient universality of a flange fixing mode are solved, and the clamping efficiency of the flange is improved.

The invention discloses a capsular bag tension ring assembly which comprises a capsular bag tension ring, a suture line and a suture needle, one end of the suture line is connected with the capsular bag tension ring, and the other end of the suture line is connected with the tail of the suture needle. The invention further discloses a using method of the capsular bag tension ring assembly, and the using method comprises the following steps that S1, the capsular bag tension ring is stored in a releaser needle tube, and the suture line and the suture needle are located outside the needle tube; s2, one end of a suture is fixed to the capsular bag tension ring, then the suture and the capsular bag tension ring are implanted into the lens capsular bag together, and the suture is adjusted to be located in the center of the dislocation capsular bag; and S3, inserting a needle from the main incision, penetrating through the anterior chamber and passing through the rear part of the iris, withdrawing the needle from the edge of the keratosclera, fixing the capsular bag tension ring by using a suture technology after withdrawing the needle, and keeping the lens capsular bag, the capsular bag tension ring and a suture in the center and constant, so that the artificial lens is safely implanted and the dislocation condition is corrected. The invention is mainly used for maintaining the stability of the lens capsular bag in the moderate and severe lens imperfect dislocation operation.

The utility model provides a high-precision adjustment-free aluminum extrusion coating die which comprises a male die and a female die, the male die and the female die are independently arranged and are parallel to each other, a certain gap is reserved between the male die and the female die, a gap channel between the male die and the female die is a die stripping position, and the gap between the male die and the female die is the thickness of an aluminum sheath. One end of the die body is provided with a die nozzle, the other end of the die body is fixedly connected with the base, a section opening is formed in one side, close to the die nozzle, of the die body of the male die, and in the aluminum sheath manufacturing process, the size of an upper side runner is increased through the section opening formed in one side of the die body, so that the thickness of the upper end aluminum sheath is increased; the consistency of the thickness of the aluminum sheath at the upper end and the overall thickness of the aluminum sheath is guaranteed, the eccentricity of the aluminum sheath is reduced, and the purpose of mold adjustment-free is achieved.

The utility model relates to a gear meshing instrument eccentricity compensation device, and relates to the technical field of gear detection, the gear meshing instrument eccentricity compensation device comprises an induction assembly and a correction assembly, the induction assembly is located on an ejector pin frame of a gear meshing instrument and is connected with the gear meshing instrument, and the induction assembly is used for detecting the eccentricity of a gear shaft; the correction assembly is located on a base of the gear meshing instrument and connected with the gear meshing instrument, and the correction assembly is used for eliminating the eccentricity of a gear shaft. The gear parameter measuring device has the effect of facilitating gear parameter measurement.

This utility model belongs to the field of smart lock technology, and relates to a clamping mechanism and a smart door lock. The clamping mechanism includes a rotating component and a slide adjustment component axially connected to the rotating component. When the rotating component rotates and there is eccentricity, the slide adjustment component adjusts in a first direction and / or a second direction to reduce the eccentricity; wherein the first and second directions intersect and are both in the radial direction. The clamping mechanism and smart door lock provided by this utility model, when the rotating component of the clamping mechanism rotates and there is eccentricity between the knob or key and the rotating component, the slide adjustment component can adjust in the first direction and / or the second direction to reduce the eccentricity, effectively avoiding the problem of the clamping mechanism being unable to rotate or the lock being damaged due to forced rotation of the clamping mechanism. This effectively improves the usability and service life of locks with this clamping mechanism, providing users with a better user experience.

The utility model belongs to the technical field of single crystal furnace production, and particularly relates to a water cooling device for single crystal furnace production, which comprises a water cooling jacket body, a water inlet pipe, a water outlet pipe, a lifting mechanism and a crushing mechanism, the lifting mechanism comprises a power source, a lead screw and a nut seat, the power source is fixedly connected with the single crystal furnace body through the supporting frame, the lead screw is fixedly connected with an output shaft of the power source, the nut seat is fixedly connected with the water-cooled jacket body, the lead screw is in threaded connection with the nut seat, and the crushing mechanism is detachably connected with the single crystal furnace body. Comprising a pulling rope and a crushing head, a single crystal furnace body is fixedly connected with a plurality of groups of lifting lugs, the pulling rope is hung on the lifting lugs, the crushing head is in an inverted cone shape and is fixedly connected with the pulling rope, and the water cooling device in the single crystal furnace has the beneficial effects that the water cooling effect and the quality of a monocrystalline silicon finished product are improved, and the cleaning of the water cooling device in the single crystal furnace is increased.

This utility model relates to the field of curling irons, and more particularly to an adjustment device for an adjustable curling iron, including an adjustment part comprising a rotating paddle, a first gear and a second gear, and a driven gear; and a rotating part comprising a positioning plastic, heating wires, a drive shaft, and a support shaft. This utility model achieves high precision and stability in adjusting the curling area of ​​the curling iron through precise gear transmission and axial limiting design. The rotating paddle, through meshing with the first and second gears, can precisely control the rotation angle of the driven gear, thereby driving the coordinated movement of the drive shaft. The first limiting protrusion passes through the first limiting groove and the moving groove, ensuring the movement of the positioning plastic with the heating wire attached when the drive shaft operates, ensuring precise positioning and smooth movement of the rotating parts, effectively preventing the curling iron from shaking and loosening during use, and allowing for arbitrary adjustment of the size of the curling area formed by each heating wire, improving the accuracy of the curling iron and the user experience.

The invention belongs to the technical field of slope support, and discloses a split retaining wall and a construction method thereof, the split retaining wall comprises a double-row pile foundation, a joist, a multi-row retaining wall and a support beam; the double-row pile foundations are arranged side by side at a first preset interval and extend below the ground line. The joist is arranged on the top of the double-row pile foundation in a crossing mode. The multiple rows of retaining walls are sequentially and fixedly arranged at the top of the joist, and the top elevations of the multiple rows of retaining walls are arranged in a step shape. The supporting beams are arranged between two adjacent rows of retaining walls, and the two ends of each supporting beam are fixedly connected with the two rows of retaining walls. The stability is improved through the double-row staggered pile foundations, the split retaining wall flexibly adapts to the terrain, construction is simplified through prefabrication and assembly, the progress is accelerated while the cost is reduced, and quality control is more reliable. The unique design reduces material consumption, combines decoration and greening, not only beautifies the environment, but also remarkably improves social and economic benefits, and brings comprehensive optimization and appreciation to engineering projects.

The invention discloses a planetary gear mechanism, a grinding device and grinding equipment. The technical problem that in the prior art, a planetary gear mechanism is low in power output stability is solved. The planetary gear mechanism comprises a fixing frame, a sun gear, a planet gear and an inner gear ring, the sun gear, the planet gear and the inner gear ring are sequentially meshed, the sun gear is used for power input, and the fixing frame is provided with an output part used for power output. The planet gear is rotatably mounted in the fixing frame; the planet gear comprises a first-stage gear and a second-stage gear which are arranged in the axial direction, the first-stage gear is meshed with the sun gear, the second-stage gear is meshed with the inner gear ring, and the first-stage gear is closer to the output part than the second-stage gear. The power transmission process of the planetary gear mechanism is not linearly transmitted, but is a process of axially transmitting the power in a reciprocating manner along the planetary gear, and an eccentric error is automatically corrected in the power transmission process, so that the eccentricity of the fixing frame can be remarkably reduced, and the transmission stability of the planetary gear mechanism is improved.

The invention discloses a large constellation ultrahigh-precision phase adjustment method, system and device considering camera incoming light avoidance and eccentricity rate control and a storage medium, belongs to the technical field of constellation phase adjustment, and solves the problem that the prior art lacks a large constellation ultrahigh-precision phase adjustment method considering camera incoming light avoidance and eccentricity rate control. Sorting the plurality of satellites based on the average orbit initial height in the initial orbit information of the plurality of satellites in the large constellation, and taking the satellite with the highest average orbit initial height as a reference satellite; any satellite except the reference satellite in the large constellation is selected, and the orbit control day number and the orbit control circle number of the satellite are obtained respectively; respectively obtaining the optimal orbit control day number and the optimal orbit control circle number of the satellite; selecting the orbit control time within the optimal orbit control circle number of the satellite; and the operation is repeatedly executed until the orbit control time of all satellites in the large constellation is determined, and then phase adjustment of the large constellation is completed.