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531 results about "Outer annulus" patented technology
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Elastic support integrated bearing and squeeze film damper integrated structure with outer ring provided with holes in radial direction
The invention discloses an elastic support integrated bearing and squeeze film damper integrated structure with outer ring radial holes. The elastic support integrated bearing and squeeze film damper integrated structure comprises an elastic support integrated outer ring, a bearing inner ring, a retainer, a rolling body, a squeeze film damper, a bearing seat and the like. The elastic support integrated outer ring adopts the integrated design of a squirrel-cage type elastic support and the bearing outer ring, the radial size is reduced, the centering precision is improved, and an oil storage groove and a radial oil hole are formed in the outer side wall of the bearing outer ring of the integrated structure; the extrusion oil film damper is located on the outer side of the elastic support integrated bearing, and an oil film is communicated with a radial oil hole in the bearing outer ring, so that bearing lubrication and the extrusion oil film damper share a lubricating oil path; radial lubricating oil lubrication of the bearing is achieved through the arrangement of the radial oil holes, and the situation that the bearing is damaged due to lack of oil lubrication under the extreme working condition is avoided; meanwhile, the oil storage grooves and the radial oil holes can effectively promote flowing of lubricating oil in an oil film, formation of a dead cavity of the squeeze oil film damper is avoided, and the vibration reduction effect of the squeeze oil film damper is enhanced.
Owner:INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
Gas lift reverse circulation drilling starting pressure and circulation gas supply pressure calculation method
The invention discloses a gas lift reverse circulation drilling starting pressure and circulation gas supply pressure calculation method. The method comprises the following steps that S1, hydrostatic pressure of the bottom of an inner pipe of a double-wall drill rod is calculated; s2, calculating the friction loss pressure of compressed air of an outer annulus of the double-wall drill rod; s3, calculating the friction loss pressure of the compressed air flowing through the earth surface gas transmission channel; s4, calculating the local pressure loss of the compressed air passing through the orifice in the gas-liquid mixer from the outer pipe of the double-wall drill rod; s5, calculating the liquid phase flow friction pressure loss of the inner pipe of the double-wall drill pipe; s6, calculating the liquid-phase flow friction pressure loss of the deslagging pipeline; s7, calculating the three-phase flow pressure drop of the inner pipe of the double-wall drill pipe; and S8, the starting pressure and the circulating air supply pressure are calculated. According to the method for calculating the starting pressure and the circulating gas supply pressure of the gas lift reverse circulation drilling, the starting pressure and the circulating gas supply pressure of the gas lift reverse circulation drilling can be accurately and conveniently calculated by accurately calculating the pressure of each part of the gas lift reverse circulation drilling process, and a theoretical basis is provided for stable and efficient operation of a circulating system.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING) +2
Efficient cleaning device for feed circular mold
The invention relates to the technical field of feed circular mold cleaning, in particular to a feed circular mold efficient cleaning device which comprises a second cylinder, a light block, a spraying assembly, a driving assembly and a lifting assembly. A cylinder II is fixedly connected in the cylinder I; a plurality of light blocks are connected to the outer ring face of the second cylinder in an annular array mode. The sections of the light blocks are isosceles triangles; the cylinder I is connected with a spraying assembly; clean water is blocked through a second cylinder, so that the clean water can be prevented from carrying impurities to be sprayed into a through hole in the other side of the feed circular mold, the cleaning efficiency is improved, meanwhile, the clean water splashed after making contact with the second cylinder is intercepted through a light block, the clean water is prevented from carrying impurities to be splashed back to the inner side face of the feed circular mold, and the cleaning effect is ensured. And the side, close to the feed circular mold, of the light block is arranged to be a long inclined face, so that when the clear water impacts the long inclined face of the light block, the clear water can flow towards the second cylinder along the long inclined face, the clear water sputtering phenomenon can be reduced, and the cleaning effect is further ensured.
Owner:CHANGZHOU JUMEILA MOULD TECH CO LTD
Double-ring shear type acceleration sensor and forming method thereof
The invention discloses a double-ring shear type acceleration sensor and a forming method thereof, and belongs to the field of sensors. The sensor comprises a base, an annular mass block, a first piezoelectric ring, a second piezoelectric ring, an upper cover and a connector, the base comprises a bottom plate, an outer annular surrounding plate and an inner annular surrounding plate, the outer annular surrounding plate and the inner annular surrounding plate are coaxially arranged, a second threaded hole is formed in the outer annular surrounding plate, and the connector is installed in the second threaded hole and is in threaded fit with the second threaded hole; a first annular boss and a first annular positioning step are arranged on the outer annular face of the inner annular surrounding plate, and a second annular boss and a second positioning step are arranged on the inner annular face of the outer annular surrounding plate. The first piezoelectric ring and the second piezoelectric ring are polarized in the same direction in the axial direction. The double-layer annular nested structure ensures the lateral bending resistance of the sensor, and the lightweight design increases the bandwidth of the sensor. The structure center penetrating type mounting hole can ensure tight connection between the sensor and an object to be detected, so that the detection precision of the acceleration sensor can be improved.
Owner:SHENZHEN UNIV
Ventilation connecting structure and system for large pipeline of ship ammonia fuel engine
PendingCN120626850AFlanged jointsInternal combustion piston enginesStructural engineeringMechanical engineering
The invention discloses a ventilation connecting structure and system for a large pipeline of a ship ammonia fuel engine, and belongs to the technical field of ships, the ventilation connecting structure comprises a first ventilation flange and a second ventilation flange which are connected in a paired mode, and an inner ring sealing structure is arranged at the contact position of the first ventilation flange and the second ventilation flange; an outer ring sealing structure is arranged outside the inner ring sealing structure, an annular discharging groove is formed between the inner ring sealing structure and the outer ring sealing structure, and a ventilation outlet and a cleaning opening are formed in the outer portion of the first ventilation flange and communicate with the annular discharging groove. The ventilation structure of paired installation flanges is simplified, the layout of a ventilation system is optimized, the manufacturing cost is low, and installation is convenient; the required negative pressure ventilation air quantity is small, the type selection capacity and size of each related device and accessory are small, and the initial investment cost, the later maintenance cost and the operation cost are low; ventilation air is distributed in a centralized mode, and through switching of on-off states of the ventilation stop valves, which group of flange connection in the system leaks can be distinguished and confirmed conveniently.
Owner:CHINA SHIPBUILDING IND GRP DIESEL ENGINE CO LTD
Fuel Can
A fuel can includes a can body, the can body contains liquid fuel and a wick with its lower end immersed in the liquid fuel, and a top cover is provided at a top of the can body. The top cover includes a ring-pull cap and a sealing cap, the ring-pull cap consists of an outer ring and a tear-off piece, the outer ring is connected to an upper opening of the can body in a sealing manner, and the sealing cap is buckled at a top end of the outer ring; a tray is provided at an upper end of the can body, and a periphery of the tray is connected to an inner wall of the can body in a sealing manner, and at least one fixing mouth for fixing the upper end of the wick provided in a middle of the tray.
Owner:TANGSHAN SAIDISI METAL PACKAGING CO LTD
Bump stop for non-pneumatic tire
A non-pneumatic tire includes an annular inner ring, an annular outer ring, and a support structure extending from the annular inner ring to the annular outer ring. The support structure includes a plurality of spokes, webbing, cells, or other open-sided support structure. The tire includes a bump stop. The bump stop includes an inner member radially extending from a radially outer surface of the annular inner ring. The inner member has a radially outer surface facing a radially inner surface of the annular outer ring. The bump stop includes an outer member radially extending from a radially inner surface of the annular outer ring. The outer member has a radially inner surface facing a radially outer surface of the annular inner ring.
Owner:BRIDGESTONE AMERICAS TIRE OPERATIONS LLC
Annular combined protection tool and using method
The invention relates to an annular combined protection tool and a using method, the annular combined protection tool comprises an upper cover plate and a lower cover plate, the upper cover plate and the lower cover plate are provided with via holes corresponding to bearing pedestal flange connecting holes, and the upper cover plate and the lower cover plate are connected through screws or studs; the lower cover plate adopts an inner and outer ring nesting structure and comprises an outer ring cover plate and an inner ring cover plate, and an adjustable sealing strip is arranged on the inner ring of the inner ring cover plate; the problems of insufficient protection, poor sealing performance and insufficient adaptability in the paint spraying process of the bearing seat are effectively solved; according to the device, the upper cover plate and the lower cover plate are combined with the adjustable sealing strip, so that tight attachment to the surface of the bearing seat is ensured, and paint particles are prevented from invading; the quick locking mechanism realizes quick mounting and dismounting through an eccentric cam and a locking handle, so that the operation efficiency is improved; an inner and outer ring nesting structure is matched with a radial adjusting mechanism, so that the device adapts to bearing seats with different sizes, and the flexibility is high; meanwhile, the buffer cushion layer effectively relieves pressure accumulation and enhances the protection effect.
Owner:CSSC NANJING LUZHOU MACHINE
Flow-adjustable pipeline
PendingCN120487908AOperating means/releasing devices for valvesValve members for absorbing fluid energyGear wheelPhysics
The flow-adjustable pipeline comprises an outer ring and an inner ring, the outer ring is hollow, a mounting groove is formed in the outer ring, and the inner ring is arranged in the mounting groove in a clearance fit mode; the outer ring comprises an outer adjusting ring, a connecting ring and a power ring, and the outer adjusting ring, the connecting ring and the power ring are rotationally connected in sequence; a first annular groove is formed between the outer adjusting ring and the connecting ring, the first annular groove is formed in the inner wall of the outer adjusting ring and the inner wall of the connecting ring, a second annular groove is formed between the power ring and the connecting ring, and the second annular groove is formed in the inner wall of the power ring and the inner wall of the connecting ring. The inner ring comprises an upper gear ring, a middle gear ring and a lower gear ring, a plurality of first blade adjusting gears are meshed between teeth of the upper gear ring and teeth of the middle gear ring, and a plurality of second blade adjusting gears are meshed between teeth of the lower gear ring and teeth of the middle gear ring. The device solves the problem of poor flow velocity controllability of the current pipeline.
Owner:YICHANG MANBO PIPELINE INSTALLATION CO LTD
Rigidity suppression and damping enhancement type squeeze film damper
The invention relates to a rigidity suppression and damping enhancement type squeeze film damper which comprises a damper outer ring, a damper inner ring and two sealing expansion rings located between the damper outer ring and the damper inner ring, an oil film is formed between the damper outer ring and the damper inner ring, an oil supply hole communicated to the oil film is formed in the damper outer ring, and the oil supply hole is communicated with the oil film. The sealing device is characterized in that an annular groove is formed in the outer circle of the damper inner ring, the sealing expansion rings are located in the annular groove, a plurality of bosses distributed in the circumferential direction are arranged between the sides, away from each other, of the two sealing expansion rings and the annular groove, and a plurality of leakage grooves distributed in the circumferential direction are formed in the sealing expansion rings. After the leakage channel is innovatively and additionally arranged on the first sealing face or the second sealing face, the amplitude of oil film force is obviously reduced, the mechanical vector of the oil film force is obviously deviated in the tangential direction, then the rigidity of the oil film is greatly reduced, the structural improvement effectively optimizes the dynamic performance of a system by changing the distribution characteristic of the oil film force, and the service life of the system is prolonged. And a good inhibition effect is achieved on the generation of steam cavitation.
Owner:SHENYANG AEROSPACE UNIVERSITY
Tooling and method for assembling a vane ring
Tooling and methods for assembling a vane ring of a turbine engine are provided. A tool includes a base configured to receive an outer ring and vanes radially inwardly of the outer ring. A heater is operable to apply heat to the outer ring when the outer ring is received on the base. Expandable jaws having a plurality of radially actuatable pads are operable to urge the vanes radially outwardly toward the outer ring. A press is operable to apply an axial force against an inner support of the vane ring to install the inner support radially inwardly of the vanes.
Owner:PRATT & WHITNEY CANADA CORP
Planetary gear box planetary attenuation spring damper
This invention relates to planetary damping spring dampers for gearboxes. Specifically, a planetary gear arrangement includes planetary gears rotatable on planetary bearings mounted to a bracket of the planetary gear arrangement via support pins. A damping spring is disposed between the outer surface of the outer ring of the bearing and the opposing inner surface of the planetary gear, and includes an annular gap. A spring diaphragm damper is disposed between the cylindrical outer surface of the support pin and the opposing inner surface of the inner ring of the planetary bearing, and also includes an annular gap. The support pin (96) and / or the outer ring includes an oil supply hole leading to the corresponding annular gap. Gas turbine engines include planetary gear arrangements having such planetary bearings.
Owner:GENERAL ELECTRIC CO
Magnetic suspension axial bearing, stator and iron core thereof, compressor and method
The invention provides a magnetic suspension axial bearing and a stator, an iron core, a compressor and a method thereof, the stator iron core comprises a first sub-block and a second sub-block, the first sub-block is provided with an iron core inner ring, the second sub-block is provided with an iron core outer ring, the iron core inner ring is used for being sleeved and fixed on the outer side of an insulation framework, and the insulation framework is sleeved and fixed on the outer side of the first sub-block. The annular winding groove, deviating from one side of the iron core inner ring, of the insulating framework extends in the circumferential direction of the iron core inner ring; wherein the second sub-block is used for being assembled on the first sub-block, so that the iron core outer ring is arranged on the outer side of the iron core inner ring in a sleeving manner, and an annular groove for accommodating the insulating framework is formed between the iron core outer ring and the iron core inner ring. According to the invention, the winding difficulty can be reduced.
Owner:GREE ELECTRIC APPLIANCE INC OF ZHUHAI
Method and device for checking air tightness of long shaft assembly
The invention discloses a method and a device for checking the air tightness of a long shaft assembly. The device comprises an outer ring piece, an inner ring piece, a joint, a valve, a first rubber sealing ring, a bolt, a gasket, a nut, a second rubber sealing ring and a pipeline. On the premise of not blocking a plurality of air holes which influence the air tightness of the junction surface H in the long shaft assembly, the inspection device is adopted to establish an annular closed cavity, and the inner ring surface of the annular closed cavity comprises the junction surface H, an outer ring surface and two axial end surfaces. Wherein two sealing pairs are established at the contact positions of the inspection device, the long shaft assembly and the sealing shell. The method is easy and efficient to operate, air holes in the shell do not need to be blocked and sealed, and the inspection result is accurate.
Owner:CHINA HANGFA GUIZHOU LIYANG AVIATION POWER CO LTD
A method of underbalanced well drilling
A method for tripping out of an underbalanced well, the method comprising: determining the drilling fluid balance density and the annular pressure loss outside the drill pipe; determining the time for oil and gas to surge to the wellhead and the tripping time to the depth of the first injected gas plug, and comparing them to determine whether the conditions for safe operation are met; if the conditions for safe operation are met, determining the density and volume of the first gas plug based on the drilling fluid balance density and the annular pressure loss outside the drill pipe; tripping out of the well based on the density and volume of the first gas plug, completing the tripping out of the first gas plug; determining the density and volume of the gas plug at the depth near the wellhead using a preset method based on the depth after the tripping out of the first gas plug; and completing the tripping out of the gas plug near the wellhead based on the determined density and volume of the gas plug at the depth near the wellhead.
Owner:PETROCHINA CO LTD
Air conditioner defrosting control method, air conditioner and readable storage medium
The invention provides an air conditioner defrosting control method, an air conditioner and a readable storage medium. The air conditioner defrosting control method comprises the steps that an air conditioner is controlled to operate in a defrosting mode; when the operation duration of the defrosting mode reaches the preset duration, the outer ring temperature, the outer ring relative humidity and the outer side pipe temperature are obtained; if the outer side pipe temperature is smaller than or equal to the preset pipe temperature and the outer ring relative humidity is larger than or equal to the first preset humidity, the frequency variation and the opening degree variation are determined according to the outer ring temperature and the outer ring relative humidity; and the frequency of the compressor is increased according to the frequency variation, and the opening degree of the expansion valve is decreased according to the opening degree variation. According to the control method, the frequency variable quantity and the opening variable quantity are determined according to environmental parameters such as the outer side pipe temperature, the outer ring temperature and the outer ring relative humidity which are closely related to the current working condition, defrosting is rapidly and effectively completed, and it is guaranteed that defrosting is thorough and free of residues.
Owner:GREE ELECTRIC APPLIANCE INC OF ZHUHAI
Machine tool spindle unit
The present invention provides a spindle device for a machine tool that prevents lubricating oil from adhering to the area around the bearing and prevents the bearing temperature from rising due to the re-inflow of lubricating oil. [Solution] An air supply passage 34 is provided radially through the outer ring collar 31, which has a notch 33 that forms part of the oil drain passage 29. An air introduction passage 35 is provided in the fixed housing 2 to supply air to the air supply passage 34 of the outer ring collar 31. The inner ring collar 32 consists of a first ring portion 41 that faces the inner surface of the outer ring collar 31 from the radially inward side with a required gap between them, and a second ring portion 42 positioned between the first ring portion 41 and the inner ring 4b. The outer diameter of the second ring portion 42 is larger than the inner diameter of the outer ring collar 31, so that a gap G is formed between the outer ring collar 31 and the second ring portion 42, which serves as a guide passage 36 that guides the air blown out from the air supply passage 34 of the outer ring collar 31 to the oil drain passage 29.
Owner:OKUMA CORP
Low-friction rubber sealing ring capable of eliminating shaking abnormal sound of oil cylinder
The utility model relates to the technical field of rubber sealing rings, and discloses a low-friction rubber sealing ring capable of eliminating shaking abnormal sound of an oil cylinder, which comprises a rubber ring body, an outer ring is fixedly connected to the outer wall of the rubber ring body, an inner ring is fixedly connected to the side wall of the rubber ring body, and a plurality of slightly convex sealing sliding sections are arranged in the rubber ring body. The micro-convex sealing sliding sections are arranged in the rubber ring body in an annular array mode, an outer sealing lip is formed in the outer ring, and an inner sealing lip is formed in the inner ring. In the utility model, the outer sealing lip and the inner sealing lip have a buffering function while sealing, impact force and vibration generated by the movement of the piston can be absorbed by the elastic deformation of the lips, for example, when the piston is quickly started, the elastic deformation of the lips converts the impact force and reduces shaking, and as the lips are tightly attached to the wall of the oil cylinder and the piston, the vibration can be isolated and the sealing performance can be maintained; and the problem of shaking abnormal sound of the oil cylinder is effectively eliminated.
Owner:HEBEI LONGLI SEALING TECH CO LTD
High-precision locking washer with inner sawteeth and outer sawteeth
The utility model relates to the field of sawtooth locking washers, in particular to a high-precision inner and outer sawtooth locking washer, which comprises a plurality of outer sawteeth, a lower ring, a plurality of inner sawteeth and an upper ring, the plurality of outer sawteeth are fixedly arranged on the outer circumferential surface of the lower ring, the plurality of inner sawteeth are fixedly arranged on the inner ring surface of the upper ring, and a clamping block is arranged on the inner ring surface of the lower ring. A notch is formed in the outer ring face of the upper ring, the width of the notch is not smaller than that of the clamping block, a clamping groove is formed in one side wall of the notch, the thickness of the clamping groove is consistent with that of the clamping block, the clamping groove is in the shape of an unclosed annular section with the central axis of the upper ring as the axis, the clamping block is connected with the clamping groove in a clamped mode, and the thickness of the upper ring is consistent with that of the lower ring. When the gasket is replaced and the mounting bolt is unscrewed, the upper ring and the lower ring cannot rotate synchronously, so that the outer sawteeth or the inner sawteeth can recover from a deformation state, the force applied to a mounting plane by the outer sawteeth and the inner sawteeth is reduced, and the scratch of the mounting plane is reduced.
Owner:JIASHAN YONGXIN FASTENER
Stator core assembly
The utility model discloses a stator iron core assembly, comprising a plurality of iron core sheets which are successively laminated from top to bottom, the middle part of each iron core sheet is provided with a circular hole, each iron core sheet comprises an annular stator yoke part, and the circular hole is formed in the middle part of the stator yoke part; every two adjacent iron core sheets are connected together through riveting, the inner side wall of each round hole is provided with a semicircular groove extending in the axial direction, the peripheral side wall of the stator yoke part is connected with a plurality of wrapping posts which are sequentially arranged at equal intervals in the circumferential direction, and each wrapping post comprises a connecting section and an outer ring section. One end of the connecting section is integrally formed and connected to the peripheral side wall of the stator yoke part, the outer ring section is integrally formed and connected to the other end of the connecting section, the included angle between the inner side surface of the outer ring section and the connecting section is a right angle, and the outer side surface of the outer ring section is an arc-shaped surface protruding outwards; first R angles are arranged at the two ends of the inner side face and the outer side face of the outer ring section in the circumferential direction; therefore, the purpose of preventing burrs and burrs can be achieved, and the winding can be prevented from being cut off.
Owner:DONGGUAN QIXIANG HARDWARE TECH CO LTD
Electric compaction apparatus
Owner:HEILONGJIANG TRANSPORT INVESTMENT GRP CO LTD +1
Integrated composite sewage intercepting well
The utility model provides an integrated composite sewage intercepting well, which belongs to the technical field of drainage inspection wells, the inspection well comprises an outer ring well and an inner ring well, the outer ring well surrounds the outer side of the inner ring well, the inner ring well is formed by an inner ring well wall, and the outer ring well is formed by an outer ring well wall and an inner ring well wall; a water passing hole communicated with the outer ring well and the inner ring well is formed in the well wall of the inner ring well, a float valve is arranged on the side, facing the outer ring well, of the water passing hole, a duckbill valve is arranged on the side, facing the inner ring well, of the water passing hole, the inner ring well is provided with an inner ring well water inlet pipe and an inner ring well water outlet pipe, and the outer ring well is provided with a confluence water inlet pipe, an overflow water outlet pipe and a water retaining weir. The water retaining weir is located between the water passing hole and the confluence water inlet pipe. The multifunctional inspection well is divided into two parts, the outer ring well is divided into the water inlet area, the overflow area and the energy dissipation area, the inner ring well is divided into the connection area, the closure area and the water outlet area, the multifunctional inspection well can effectively prevent water immersion, land occupation is saved, and investment is reduced.
Owner:BEIJING GENERAL MUNICIPAL ENG DESIGN & RES INST
An adjustable and replaceable device for reducing vibration of rotating equipment in marine environments.
ActiveCN224453160UReduce vibration amplitudeImprove long-term safe and stable operation capabilitiesVibration amplitudeClassical mechanics
This utility model discloses an adjustable and replaceable device for reducing vibration of rotating equipment in marine environments, comprising: an outer pipe, a main shaft, and a bearing bracket. The outer pipe is coaxially arranged with the main shaft, and the bearing bracket is sleeved on the outside of the main shaft. An annular groove is provided on the inner wall of the outer pipe at a position corresponding to that of the bearing bracket. A positioning ring is detachably installed in the annular groove. An outer ring is provided on the outer edge of the bearing bracket, and the outer ring cooperates with the positioning ring. The positioning ring reduces the fitting gap, improves the overall stability of the bearing bracket and the outer pipe, and thus enhances the stability of the bearing and pump unit. It can reduce the vibration amplitude of the rotating equipment and improve the long-term safe and stable operation capability of the rotating equipment in marine environments. The addition of the 316L positioning ring simplifies on-site construction, and the positioning ring can be adjusted and replaced in a timely manner according to the subsequent vibration of the rotating equipment.
Owner:XIAMEN UNIV
Novel heat-resistant steam rubber pipe
The utility model is applicable to the technical field of rubber hoses, and provides a novel heat-resistant steam rubber hose which comprises a rubber hose body, a connector is fixed at one end of the rubber hose body, an installation head is arranged at one end of the connector, and an inner ring is fixed in the side, close to the rubber hose body, of the installation head. Due to the arrangement of the installation head, when the rubber pipe body and other devices are connected and combined for use, the connection position can be sealed through the inner ring and the outer ring, the leakage condition is avoided, meanwhile, due to the effect of the fixing ring, the rubber pipe body can be prevented from being damaged, and the service life of the rubber pipe body is prolonged. According to the rubber hose, the connecting head and the mounting head can be connected more tightly through the first heat-resisting layer and the second heat-resisting layer, the heat resistance of the rubber hose is enhanced through the action of the first heat-resisting layer and the second heat-resisting layer, the rubber hose can be shaped through the action of the reinforcing layer, and the situation that the rubber hose deforms in the using process is avoided.
Owner:HEBEI HARUI RUBBER PRODUCTS CO LTD
Solid precursor heating device for induction heating
The present application provides a solid precursor heating device for induction heating, comprising: a stainless steel cylinder having a bottom plate, an outer ring wall, a cover and an exhaust pipe, the bottom plate and the outer ring wall define an internal space, the cover is separably arranged at the top of the outer ring wall, the exhaust pipe is arranged on the cover and is communicated with the internal space, and the exhaust pipe is communicated with the internal space; the magnetic conductivity of the stainless steel cylinder is higher than 1H / m; the plurality of vertically stacked disc bodies are separably arranged in the inner space, each disc body is provided with a bearing space, an additional circuit board, an annular edge and a circular ring, and the bearing space is defined among the additional circuit board, the annular edge and the circular ring.
Owner:嘉善卓益凯盛科技有限公司
Elastic ring dynamic stiffness testing device considering extrusion oil film characteristics under rotary excitation
The present application belongs to the technical field of performance test of aero-engine parts, and particularly relates to an elastic ring dynamic stiffness testing device considering extrusion oil film characteristics under rotary excitation, comprising a rotary excitation driving assembly, an elastic ring assembly, a plurality of force sensor assemblies and an outer shell. An annular chamber of the extrusion oil film is formed between the inner and outer bushings of the elastic ring assembly, the elastic ring assembly is installed between the inner and outer bushings, and the outer bushing is fixed to the outer shell through the force sensor assembly; the inner bushing is used for tight fit with the bearing outer ring. The present application can accurately simulate the elastic ring extrusion oil film characteristics under rotary excitation, apply rotary excitation load by using an unbalanced rotor system with adjustable unbalance, directly measure the excitation force amplitude by cross-arranged dynamic force sensors, measure the rotor displacement response by high-precision laser displacement sensors, and further realize accurate testing of dynamic stiffness considering the elastic ring structure and oil film characteristics, thereby providing strong support for elastic ring design.
Owner:BEIHANG UNIV
Double-seal leak-proof structure of sleeve furnace rotary joint
The utility model relates to metallurgy, chemical equipment sealing connection technical field, concretely is sleeve furnace rotary joint double -sealed leakproof structure, including static pipe and rotating pipe, and the integrated connection pipe that goes into the inside of static pipe is formed on rotating pipe, and one sealed bearing is installed on the inner ring wall of connection pipe, and the integrated connection ring that is connected with sealed bearing is formed in static pipe. The utility model discloses a sealed bearing is arranged on the inner ring wall of the connection pipe of rotating pipe, and the interference fit of its outer ring and connection pipe, inner ring and static pipe connection ring forms first heavy sealing, and the structure of the annular sealing groove is set up simultaneously in the outer ring wall of connection pipe, and the sealing convex ring of cooperation outer sealing pipe forms second heavy rotary seal, and the leakproof performance of rotary joint is improved significantly in double -sealed structure, the threaded connection mode of outer sealing pipe and static pipe, the close adhesion of sealed convex ring and annular sealing groove is guaranteed, and it is convenient to install and maintain, realizes the reliable sealing when static pipe and rotating pipe relatively rotate.
Owner:JIANGSU YULI ENERGY SAVING TECH CO LTD
Sealing structure and motor cover thereof
The utility model discloses a sealing structure and a motor cover thereof, and belongs to the technical field of motor sealing, and the sealing structure comprises a sealing ring which is provided with a slot; the insertion ring is matched with the insertion groove; a plurality of ring grooves are formed in the outer ring surface of the inner ring; and the outer ring is rotatably sleeved on the outer side of the inner ring, and the outer ring is fixedly connected with a convex ring matched with the ring groove, so that the motor cover and the motor shell can be stably sealed, and liquid such as water, oil and the like can be effectively prevented from permeating.
Owner:ANHUI METEK MECHANICAL & ELECTRICAL CO LTD
A turbine guide vane air flow test fixture and method
This invention relates to a test fixture and method for testing the airflow of a turbine guide vane. The fixture includes an inlet side and an outlet side, which are connected to form a clamping groove. The inlet side includes an outer inlet ring and an inner inlet ring, and the outlet side includes an outer outlet ring and an inner outlet ring. The end of the outer inlet ring furthest from the outer outlet ring is inclined towards the axis of the outer inlet ring, and the end of the outer inlet ring closest to the outer outlet ring has a rounded corner on its inner sidewall. The sidewall of the inner inlet ring furthest from the outer outlet ring is conical, and the apex of the conical sidewall of the inner inlet ring has a rounded corner, as does the end of the conical sidewall furthest from its apex. The fixture in this design minimizes air pressure and flow loss during airflow testing of the turbine guide vane, thus reducing measurement errors in the test results to a minimum.
Owner:CHINA HANGFA SOUTH IND CO LTD
A bolt connection structure suitable for power turbine casing
The present application belongs to the field of aero-engine technology, and particularly relates to a bolt connection structure suitable for a power turbine casing, a power turbine casing, and a plurality of segmented power turbine outer rings mounted on the inner wall surface of the power turbine casing; wherein, the inner wall surface of the power turbine casing is provided with a plurality of annular stoppers and a plurality of annular mounting platforms; the annular mounting platform is composed of a ring having a plurality of circumferentially distributed U-shaped through grooves for accommodating bolts, the opening of the U-shaped through grooves faces the inner side of the power turbine casing, and the end face of the U-shaped through grooves has a U-shaped groove for accommodating bushing nuts; the power turbine outer ring has an annular groove clamped in the annular stopper and a mounting edge, the mounting edge has a plurality of through holes, the bolts pass through the through holes and are connected with the U-shaped through grooves and bushing nuts, so that the mounting edge is fixedly connected to the annular mounting platform.
Owner:AECC SHENYANG ENGINE RES INST