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Main speed reducer of fan of novel GTF aircraft engine
InactiveCN104074926AReduce quality problemsReduce volumeToothed gearingsGearing detailsReduction driveCoupling
The invention discloses a main speed reducer of a fan of a novel GTF aircraft engine. The main speed reducer of the fan of the novel GTF aircraft engine is characterized in that sun gears and star gears use integrated double helical teeth, an inner tooth ring A and an inner tooth ring B are helical internal gears connected with a gear coupling through helical external splines, the gear coupling is connected with an output shaft through a straight-tooth internal spline, the speed reducer does not have an independent planetary rack, all the star gears are fixed on a left box body cover through star gear shafts, each star gear only revolves on its axis, the space position of each star gear is not changed in running, a bush of each star gear shaft uses a special structure that the diameter of the central hole is gradually changed to automatically compensate the flexible deformation of a cantilever end, and each of the input shaft and star gear shafts comprises a cantilever and a hollow structure to increase the elastic deformation ability and play a role of storing lubricating oil. The main speed reducer of the fan of the novel GTF aircraft engine has beneficial effects of simple structure, simple technique, good uniform loading and floating effect, small speed reducer volume, strong bearing capacity, large transmission power and small vibration noise and is capable of realizing the fixed-point spray lubrication for the star gears and bearing.
Owner:BEIHANG UNIV
Low-power radial welding bogie
The invention provides a low-power radial welding bogie comprising two wheel sets, a three-piece side welding beam and a crossbeam. Two ends of the side beam are connected with the wheel sets through primary rubber-metal pads and bearing saddles respectively. The wheel sets are connected with a wheel set connecting device through the bearing saddles. A crossbeam assembly is connected with the side beam through two secondary suspension systems. A foundation brake gear is suspended on the crossbeam assembly or the side beam. The secondary suspension systems have multiple structural styles, and the wheel sets are of variable- gauge structures. Compared with conventional freight car bogies, the low-power radial welding bogie has the advantages that the bogie is good in uniform load performance; defects of cast structure swing bolsters and side frame casting are avoided; wheeltrack acting force is reduced, and wear parts of the suspension systems are reduced; the variable-gauge wheel sets meet requirements on variable-gauge performance of the bogie; high-speed operation stability of the bogie is improved, and rim wear generated when the bogie passes curves is reduced; the bogie can meet the requirements on maximum axle load of 30t and highest running speed of 200km / h.
Owner:CRRC SHANDONG CO LTD
Quick-replacement type elastic-cushion-supported tilting pad thrust bearing
ActiveCN106321623ASimple structureImprove reliabilityBearing componentsSliding contact bearingsAerospace engineeringFood processing
The invention discloses a quick-replacement type elastic-cushion-supported tilting pad thrust bearing. The quick-replacement type elastic-cushion-supported tilting pad thrust bearing is mainly composed of a thrust plate (1), elastic-cushion-supported tilting pads, a retaining check ring (5) and a supporting ring (6). Each elastic-cushion-supported tilting pad is composed of a pad face material layer (2), a pad base body (3) and an elastic cushion (4), wherein the pad face material layer (2), the pad base body (3) and the elastic cushion (4) are bonded through super epoxy resin or other superglue of the same type. According to the quick-replacement type elastic-cushion-supported tilting pad thrust bearing, elastic dovetail grooves (7) and the retaining check ring (5) are ingeniously utilized, and therefore the quick-replacement type elastic-cushion-supported tilting pad thrust bearing is simple in structure and greatly improves the reliability. Besides, it is easier to replace an abraded and ablated pad, and the pad can be quickly replaced without disassembling the bearing or a thrust ring. The quick-replacement type elastic-cushion-supported tilting pad thrust bearing is high in practicability and can be widely applied to the ship field, the water pump field, the water turbine field, the food processing field and the like.
Owner:WUHAN UNIV OF TECH
Elastic support structure of planet wheel
InactiveCN103104690AGood load balancingReduce machining accuracyGearing detailsEngineeringMechanical engineering
The invention provides an elastic support structure of a planet wheel. The elastic support structure of the planet wheel mainly comprises a bracket, the planet wheel, a bearing, a space ring and a planet pin, wherein the planet wheel is supported on a planet shaft by the support, at least one side end portion of the bearing is locked by a round nut, an adjusting space ring and a spring stop ring are arranged outside the round nut, the planetary shaft is sleeved on the planet pin and in interference link, and the bracket which is arranged on one side of the planet shaft is sleeved on the planet pin and in interference link. Bearings are two tapered roller bearings which are arranged side by side and are not provided with outer circles, and a round nut which has a radial positioning function is arranged on one end portion of the planet pin. The planet wheel is arranged between the bracket and the planet wheel, and a limit tapered ring which has an overload protection function on the planet pin is arranged under the condition of overload. The planet pin has elastic deformation and produces offset to effectively make up machining error of the planet wheel and a planet support, achieve the aim of good uniform load, and ensure synchronous meshing of multiple planet wheels.
Owner:HANGZHOU ADVANCE GEARBOX GRP
Aspheric surface measuring apparatus
InactiveCN102235853ASmall sizeReduce moving loadUsing optical meansGeometric properties/aberration measurementOptical axisComputational physics
An aspheric surface measuring apparatus includes a sample holder mechanism and an interferential optical mechanism, and performs optical interferometric measurement while rotating a sample every time a measurement angle is varied. The sample holder mechanism has a first air spindle for rotating the sample about a test surface axis and a first airslide. The first airslide carries the sample orthogonally or parallel to the test surface axis. The interference optical mechanism has an interference optical system, a first imaging system, and a second imaging system, a second air spindle, and a second airslide. The second spindle revolves or turns the interference optical system and the first and second imaging systems integrally to change a measurement angle between the measurement optical axis and the test surface axis. The second airslide carries the second air spindle orthogonally to the moving direction of the first airslide.
Owner:FUJIFILM CORP
Epicyclic gear stage for a wind turbine gearbox, a wind turbine gearbox and a wind turbine
InactiveCN101903650AGood load balanceMinimize changes in operating statusEngine fuctionsShaftsAerospace engineeringSpur gear
The invention relates to an epicyclic gear stage for a wind turbine gearbox comprising a sun gear, at least two planet gears, engaged with said sun gear, an annulus gear, and a planet carrier. Torque from the wind turbine rotor is transferred via a torque transfer part connected to said planet carrier and said torque transfer part is flexiblely connected to said planet carrier at one or more joints.
Owner:VESTAS WIND SYST AS
WW-NGWN differential multi-connected planetary reducer
The invention provides a WW-NGWN differential multi-connected planetary reducer comprises a machine base, an input shaft, an output shaft, a central wheel, inner gear rings, a planetary wheel and a planet carrier; the center wheel is divided into a first-stage center wheel and a second-stage center wheel, and the inner gear rings comprise a first inner gear ring and a second inner gear ring; the planet carrier is divided into a first-stage planet carrier and a second-stage planet carrier, and the planet wheels are divided into a first-stage planet wheel and a second-stage planet wheel; the first-stage planet wheel, the first-stage center wheel and the second-stage center wheel simultaneously mesh to form a first differential output of a first-stage deceleration system; the first-stage planetary wheel, the first-stage central wheel and the first inner ring gear simultaneously mesh to form a second differential output of the first-stage deceleration system; the second-stage planet wheelmeshes with the second-stage center wheel, the first inner gear ring and the second inner gear ring simultaneously to form a second-stage reduction system; and the second inner ring gear is fixedly connected with the output shaft. The WW-NGWN differential multi-connected planetary reducer has the advantages of large reduction ratio, large bearing capacity and higher reliability under the conditionof small volume on the premise of having the advantages of NGW and NGWN type planetary reducers.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Electric vehicle transmission system
ActiveCN103660929ASmooth operation at high speedSimple structureControl devicesElectric machineryElectric vehicle
The invention provides an electric vehicle transmission system. The electric vehicle transmission system comprises a motor and a speed reducer. The motor is provided with an output shaft. The speed reducer is provided with a box and comprises a planetary gear train and a differential mechanism, wherein the planetary gear train is driven by the output shaft and arranged coaxial with the output shaft, and the differential mechanism is driven through the output end of the planetary gear train to rotate. The central axis of the differential mechanism and the axis of the output shaft are arranged in parallel. The electric vehicle transmission system has the advantages that the planetary mechanism is adopted for the speed reducer input stage, so that vibration force arms are offset mutually, and better smoothness and stability are achieved in the process of high-speed running; the output stage of the speed reducer and the differential mechanism are integrated together, the simple in structure, occupied space is small, the overall structure of the speed reducer is compact, the weight is lighter, and the overall running is smooth and stable.
Owner:CRRC QISHUYAN INSTITUTE CO LTD
Combined bearing used for vertical epicyclic gearbox of nuclear power circulating water pump
ActiveCN102213230AEvenly loadedGood lubrication and cooling effectPump componentsPumpsPlanetary gearboxEngineering
The invention discloses a combined bearing used for a vertical epicyclic gearbox of a nuclear power circulating water pump. The combined bearing comprises a thrust bearing (1), a flexible support block (2), a radial bearing (3), a thrust bearing seat (4) and a radial bearing seat (5); the thrust bearing (1) radially penetrates through the thrust bearing seat (4) and presses on the flexible supporting block (2); an adjusting bolt (6) radially penetrates through the radial bearing seat (5) and presses on the radial bearing (3); and adjusting curved support structures are arranged between the thrust bearing (1) and the flexible support block (2), and between the radial bearing (3) and the radial bearing seat (5). In the invention, a combined bearing with large bearing capacity, long service life and easiness of disassembly and maintenance is provided; the combined bearing is used for supporting a planetary carrier and bearing large thrust and radial force generated by operation of a circulating water pump, and ensuring that the gear stands under load and the bearing is subjected to uniform stress through self-adjustment.
Owner:CHONGQING GEARBOX
Low-scooter suspension-type bogie
InactiveCN103072590ALower center of gravityIncrease channel widthBogiesAxle-boxes mountingLow GravityEngineering
The invention relates to a low-scooter suspension-type bogie, which comprises a framework of an H-shaped structure, wherein the framework is hung on a spring support through four shaft box suspension seats, a shaft box spring structure consists of a shaft box body and laminated rubber, a way for supporting the outer side of the framework is adopted, and an independent wheel pair structure with a crankshaft is also used. Compared with the prior art, a unique bogie design structure that the framework is hung on a support is adopted. A lower gravity center of the bogie can be realized, so that a passage width of a floor inside a car body on the bogie on wheels can be further increased; and by adopting the independent wheel pair structure with the crankshaft, the guide performance and the running stability of the bogie can be improved compared with the independent wheel structure.
Owner:TONGJI UNIV
Split herringbone gear and planetary transmission device thereof
ActiveCN111637198ASolve processabilitySolve installation difficultiesToothed gearingsGearing detailsAviationGear wheel
The invention relates to a split herringbone gear and a planetary transmission device thereof and belongs to the technical field of mechanical transmission. The split herringbone gear comprises a radial segmented split-mounting herringbone-tooth internal gear, an axial separate herringbone-tooth external gear, herringbone-tooth planetary gears with a uniform loading effect and a planetary carrier,wherein the herringbone-tooth planetary gears are arranged on the radial segmented split-mounting herringbone-tooth internal gear, the different herringbone-tooth planetary gears are connected through the same planetary carrier, and the axial separate herringbone-tooth external gear is connected with the herringbone-tooth planetary gears in a meshing mode. Through mutual cooperation of the phase-adjustable herringbone-tooth external gear, herringbone-tooth internal gear and herringbone-tooth planetary gears, the herringbone gear planetary transmission device with controllable rigidity fluctuation and a good uniform loading condition of the planetary gears is obtained, the problems of high machining difficulty, difficult mounting and large rigidity fluctuation of an existing herringbone-tooth gear are solved, and an effective transmission structural form is provided for high-power application occasions of mines, ships and aviation.
Owner:DONGHUA UNIV
Tapered-land thrust pad with elastic supporting structures
InactiveCN108087426ARealize elastic supportAchieve deformation controlBearing componentsLubricationWorking life
The invention discloses a tapered-land thrust pad with elastic supporting structures. The tapered-land thrust pad comprises a tapered-land thrust pad body, disc springs, five positioning columns and aretainer, and is characterized in that the five positioning columns are mounted at the geometric center and various corners of the periphery of the retainer, and each disc spring is mounted on the corresponding positioning column; the tapered-land thrust pad body is arranged on the retainer with the positioning columns and the disc springs, and pressure plates are welded on the tapered-land thrust pad body, so that the tapered-land thrust pad with the elastic supporting structures can be formed. The tapered-land thrust pad has the advantages that the tapered-land thrust pad body can be supported by the five disc springs at the center and the periphery of the tapered-land thrust pad body, accordingly the tapered-land thrust pad can be elastically supported and is excellent in uniform-loadperformance; the disc springs at the center and the periphery of the tapered-land thrust pad body are reasonably selectively arranged, and accordingly deformation of the tapered-land thrust pad can becontrolled, the lubrication performance and the use reliability of tapered-land thrust bearings can be improved, and the working lives of the bearings can be prolonged.
Owner:HARBIN UNIV OF SCI & TECH
Electric drive axle of double-stage planetary gear reducer
The invention discloses an electric drive axle of a double-stage planetary gear reducer. The electric drive axle comprises a motor, the planetary gear reducer, a differential and axle housings. The motor outputs power to the differential through the planetary gear reducer, and the axle housings are arranged outside semi-shafts on the two sides of the differential in a covering manner. Axial through holes are formed in an output shaft of the motor and a center component of the planetary gear reducer correspondingly, and the output shaft of the motor, the center of the planetary gear reducer andthe two semi-shafts are coaxially arranged. The first semi-shaft of the differential stretches out axially, and the second semi-shaft of the differential sequentially penetrates through the axial through holes of the planetary gear reducer and the output shaft of the motor axially to stretch out. By means of the scheme, through structural improvement, the occupied space is optimized, and the weight of a transmission system can be reduced.
Owner:LIUZHOU WULING MOTORS +1
An electric vehicle transmission system
ActiveCN103660929BSimple structureCompact structureControl devicesElectric power transmissionDrivetrain
The invention provides an electric vehicle transmission system. The electric vehicle transmission system comprises a motor and a speed reducer. The motor is provided with an output shaft. The speed reducer is provided with a box and comprises a planetary gear train and a differential mechanism, wherein the planetary gear train is driven by the output shaft and arranged coaxial with the output shaft, and the differential mechanism is driven through the output end of the planetary gear train to rotate. The central axis of the differential mechanism and the axis of the output shaft are arranged in parallel. The electric vehicle transmission system has the advantages that the planetary mechanism is adopted for the speed reducer input stage, so that vibration force arms are offset mutually, and better smoothness and stability are achieved in the process of high-speed running; the output stage of the speed reducer and the differential mechanism are integrated together, the simple in structure, occupied space is small, the overall structure of the speed reducer is compact, the weight is lighter, and the overall running is smooth and stable.
Owner:CRRC QISHUYAN INSTITUTE CO LTD
Split torque transmission deceleration device for helicopters
ActiveCN109695664ALarge transmission ratioImprove carrying capacityToothed gearingsTorque transmissionHerringbone gear
The invention discloses a split torque transmission deceleration device for helicopters. The split torque transmission deceleration device for the helicopters is characterized by comprising an outputstage system, four two-stage split torque systems, four one-stage split torque systems and two input stage systems; the output stage system comprises a herringbone gear and an output shaft; each two-stage split torque system comprises a first shafting and a second shafting; each first shafting comprises a spur gear I, an intermediate shaft I, a helical gear I and a helical gear II; each second shafting comprises a spur gear II, an intermediate shaft II, a helical gear III and a helical gear IV; each first-stage split torque system comprises a bevel gear shaft, a supporting frame, a differential gear train, a spur gear III, an intermediate shaft III and a spur gear IV; and each input stage system comprises an input shaft, two intermediate shafts IV and two bevel gears. According to the split torque transmission deceleration device for the helicopters, a symmetrical arrangement structures and a differential shafting are adopted, so that all stages of split torque transmission are realized, the load-uniformizing requirement is met, and the service performance of a split torque transmission system is improved.
Owner:CHONGQING UNIV
Tilting-pad thrust bearing supported through elastic disc
ActiveCN106438675ASimple structureFew partsBearing componentsSliding contact bearingsThrust bearingAxial thrust
The invention discloses a tilting-pad thrust bearing supported through an elastic disc. The tilting-pad thrust bearing is mainly composed of a thrust disc (1), a tilting material layer (2), the elastic disc (3) and a copper ring (4). The copper ring (4) is bonded to the lower surface of the elastic disc (3) and has the functions of supporting the elastic disc (3) and improving the strength of the elastic disc (3). The tilting material layer (2) is bonded to bosses (5) of the elastic disc and used for bearing axial thrust from the thrust disc (1). The tilting-pad thrust bearing has the beneficial effects of being simple in structure, convenient to machine and the like; the integral machining manner is adopted in the elastic disc, and it can be guaranteed that tiles have high planeness; and according to the thrust bearing, the character of deformation coordination of elastic materials is ingeniously utilized, and the thrust bearing has outstanding performance in the aspects of vibration reducing, noise lowering, tile load equalizing, lubricating and the like.
Owner:WUHAN UNIV OF TECH
Flexible gear ring and planetary gear system with flexible gear ring
InactiveCN107131284AGood load balanceImprove reliabilityToothed gearingsPortable liftingReduction driveGear wheel
The invention discloses a flexible gear ring and a planetary gear system with the flexible gear ring. The flexible gear ring is of a wavy structure, and the wavy structure is used for adjusting the flexibility of the flexible gear ring. The planetary gear system with the flexible gear ring comprises a sun gear and a planet gear. The planetary gear system is characterized by further comprising a flexible gear and a sleeve, the flexible gear is connected with the sleeve, the flexible gear is engaged with the planet gear, and meanwhile the planet gear is engaged with the sun gear; and the flexible gear is of a wavy structure, and the wavy structure is used for adjusting the flexibility of the flexible gear ring. The flexible gear ring and the planetary gear system with the flexible gear ring are widely applied to planet gear transmission in the fields of helicopter main retarders and inner reduction gearboxes of aircraft engines, and meet the requirements for low weight and high reliability of aircraft products. The structure of the flexible gear ring is adjustable to adapt to needs for structures with different flexibilities, uniform load of the planetary gear system and damping of the system are facilitated, and the reliability and the stability of the planetary gear system are improved remarkably.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Multilayer composite material water lubricated bearing with gradually-expanded end face
PendingCN113202859AGood load balanceGood vibration reduction effectBearing componentsSliding contact bearingsPolymerCoefficient of friction
The invention relates to a multilayer composite material water lubricated bearing with a gradually-expanded end face, which comprises a metal matrix and a polymer lining, and the polymer lining is arranged in the metal matrix; gradually expanded holes are arranged on the left end surface and / or the right end surface of the polymer lining; a supporting cavity is arranged in the metal matrix and is of an annular or semi-annular structure; and a rubber layer supporting piece is arranged in the supporting cavity so as to support the polymer lining. According to the water-lubricated bearing provided by the invention, the uniform load and vibration reduction performance of the bearing is improved through a rubber layer, the friction performance of the bearing can be improved due to the fact that the polymer lining has the characteristic of being small in friction coefficient, end friction of the bearing is avoided through the end gradually-expanded hole structure, the friction performance is improved, and a complete liquid film is easily generated on the bearing.
Owner:HOHAI UNIV CHANGZHOU
GTF engine gearbox with adjustable supporting rigidity
PendingCN114658807AAvoid the problem of low assembly accuracy and difficultySolve the phenomenon of uneven forceGear lubrication/coolingToothed gearingsGear wheelFlight vehicle
The invention discloses a GTF engine gearbox with adjustable supporting rigidity, and belongs to the technical field of aircraft power. Comprising a box body, an input shaft and an output shaft, the input shaft and the output shaft respectively penetrate through the upper box cover and the lower box cover and are driven in the box body through a gear mechanism; the gear mechanism comprises a sun gear, a star wheel combination device, an inner gear ring and an inner gear ring installation disc, the sun gear is coaxially installed at the inner end of the input shaft, and the inner gear ring is coaxially installed on the end face of the inner end of the output shaft through the inner gear ring installation disc 8 and is coaxial with the sun gear 6; the multiple star wheel combination devices are arranged between the sun wheel and the inner gear ring in the circumferential direction and engaged with the sun wheel and the inner gear ring. And a rigidity adjusting device is arranged on the lower box cover. According to the invention, the sectional type planet gear is adopted, so that the phenomenon of non-uniform stress of a spline caused by manufacturing and mounting errors of a sectional sun gear is solved; the rigidity adjusting device can adjust the supporting rigidity of the herringbone inner gear ring, and it is guaranteed that the inner gear ring keeps the optimal supporting rigidity all the time at different rotating speeds.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Flexible framework with slewing bearing for railway vehicle bogie
The invention discloses a flexible framework used for a railway vehicle bogie and provided with slewing bearings, the whole framework is H-shaped and is composed of two T-shaped beams and two sets of slewing bearings connecting the two T-shaped beams, each T-shaped beam is composed of a beam extending in the longitudinal direction and a cross beam extending towards the middle in the transverse direction, and the two T-shaped beams are connected through the two sets of slewing bearings. The two sets of slewing bearings are coaxially arranged in the mode that the axes are parallel to cross beams of the T-shaped beams, the cross beams of the two T-shaped beams are hinged along a transverse shaft, the two T-shaped beams can freely rotate around the axes of the two slewing bearings through connection of the two sets of slewing bearings, and meanwhile the two T-shaped beams are connected in an approximately rigid mode in other directions. The bogie adopting the flexible framework has extremely low torsional rigidity, so that the bogie can adapt to line irregularity to the greatest extent and ensure the stability, the cross beams of the two T-shaped beams of the framework are each of an upper-side opening structure, and a center traction device between the cross beams and a vehicle body can be arranged, so that the bogie adapts to a short wheelbase and is beneficial to installation of a driving device; and the compact and light-weight design of the bogie is realized.
Owner:SOUTHWEST JIAOTONG UNIV
Inner axle box bogie adopting novel flexible framework and permanent magnet direct drive motor
The invention discloses an inner axle box bogie adopting a novel flexible framework and a permanent magnet direct drive motor, the framework is generally H-shaped and consists of two T-shaped beams and two sets of slewing bearings for connecting the two T-shaped beams, only the degree of freedom of transverse rotation is released, and meanwhile, the two T-shaped beams are in approximately rigid connection in other directions; by means of the characteristic, the axle box suspension device can adopt a splayed rubber pad which can meet reasonable horizontal positioning and large vertical suspension rigidity between the wheel pair and the framework and is compact in structure and economical in cost, and bearings are arranged on the inner sides of the two side beams, so that the bogie is simple in structure and low in cost. And the purpose of light weight is achieved. The driving device is directly driven by a permanent magnet synchronous motor and is mounted on the left and right inner axle box bodies, a motor shaft suspension and direct drive mode is adopted, a gearbox structure can be avoided, the structure is simple, the axle distance of the bogie can be obviously reduced, and the self weight of the bogie can be reduced.
Owner:SOUTHWEST JIAOTONG UNIV
Two-stage planetary gear speed reducer and straddle type railway vehicle
The invention provides a two-stage planetary gear speed reducer. The speed reducer comprises a main body shell, a primary sun gear, primary planetary gears, transmission shafts, secondary planetary gears, a secondary sun gear, an output shaft and a rim connecting piece, wherein the primary sun gear is used for inputting power and transmitting the power to the secondary sun gear through the primaryplanetary gears and the secondary planetary gears which are located on the transmission shafts, and then the power is directly output to the output shaft by the secondary sun gear. According to the two-stage planetary gear speed reducer, better load balancing can be achieved, vibration and noise are low, and the speed reducer has the advantages that structure is compact, the size is small and manufacturing cost is low. The invention further provides a straddle type railway vehicle, and the straddle type railway vehicle is provided with the two-stage planetary gear speed reducer, so that the straddle type railway vehicle is stable in performance and low in noise.
Owner:BYD CO LTD
New gtf aero engine fan main reducer
InactiveCN104074926BReduce quality problemsReduce volumeToothed gearingsGearing detailsAviationReduction drive
Owner:BEIHANG UNIV
Detachable compact type power-dividing main transmission system
The invention relates to a detachable compact type power-dividing main transmission system which is a wind power main transmission system. The detachable compact type power-dividing main transmissionsystem comprises a first-level planetary gear train, a second-level planetary gear train and a supporting gear ring. The first-level planetary gear train is arranged in the supporting gear ring, and the supporting gear ring is fixed in a cabin system through a plurality of bearings. The left end of the supporting gear ring is connected with a wind wheel through a flange, and the right side of thesupporting gear ring is connected with a second-level planet carrier assembly. The wind wheel is supported through the supporting gear ring. The structure is compact, and the supporting rigidity is high. The supporting gear ring is connected with a second-level planet carrier, and the wind wheel drives the second-level planet carrier while driving the supporting gear ring, so that power dividing is achieved. The gear ring is in floating connection with a cabin, the uniform loading performance is good, and the bearing capacity of the whole transmission chain system is high. A three-level planetary transmission structure is adopted, the bearing capacity is high, and the transmission speed ratio is large. The planetary gear train of each level is independent and detachable. The transmission chain system has the advantages of being high in power density, compact in structure, light in weight, high in bearing capacity, convenient to maintain and replace and low in cost.
Owner:廖安国
A quick-change spring-supported tilting pad thrust bearing
ActiveCN106321623BSimple structureImprove reliabilityBearing componentsSliding contact bearingsWater turbineThrust bearing
The invention discloses a quick-replacement type elastic-cushion-supported tilting pad thrust bearing. The quick-replacement type elastic-cushion-supported tilting pad thrust bearing is mainly composed of a thrust plate (1), elastic-cushion-supported tilting pads, a retaining check ring (5) and a supporting ring (6). Each elastic-cushion-supported tilting pad is composed of a pad face material layer (2), a pad base body (3) and an elastic cushion (4), wherein the pad face material layer (2), the pad base body (3) and the elastic cushion (4) are bonded through super epoxy resin or other superglue of the same type. According to the quick-replacement type elastic-cushion-supported tilting pad thrust bearing, elastic dovetail grooves (7) and the retaining check ring (5) are ingeniously utilized, and therefore the quick-replacement type elastic-cushion-supported tilting pad thrust bearing is simple in structure and greatly improves the reliability. Besides, it is easier to replace an abraded and ablated pad, and the pad can be quickly replaced without disassembling the bearing or a thrust ring. The quick-replacement type elastic-cushion-supported tilting pad thrust bearing is high in practicability and can be widely applied to the ship field, the water pump field, the water turbine field, the food processing field and the like.
Owner:WUHAN UNIV OF TECH
A Low Power Radial Welded Bogie
The invention provides a low-power radial welding bogie comprising two wheel sets, a three-piece side welding beam and a crossbeam. Two ends of the side beam are connected with the wheel sets through primary rubber-metal pads and bearing saddles respectively. The wheel sets are connected with a wheel set connecting device through the bearing saddles. A crossbeam assembly is connected with the side beam through two secondary suspension systems. A foundation brake gear is suspended on the crossbeam assembly or the side beam. The secondary suspension systems have multiple structural styles, and the wheel sets are of variable- gauge structures. Compared with conventional freight car bogies, the low-power radial welding bogie has the advantages that the bogie is good in uniform load performance; defects of cast structure swing bolsters and side frame casting are avoided; wheeltrack acting force is reduced, and wear parts of the suspension systems are reduced; the variable-gauge wheel sets meet requirements on variable-gauge performance of the bogie; high-speed operation stability of the bogie is improved, and rim wear generated when the bogie passes curves is reduced; the bogie can meet the requirements on maximum axle load of 30t and highest running speed of 200km / h.
Owner:CRRC SHANDONG CO LTD
A tilting pad thrust bearing supported by an elastic disc
ActiveCN106438675BSimple structureFew partsBearing componentsSliding contact bearingsThrust bearingAxial thrust
The invention discloses a tilting-pad thrust bearing supported through an elastic disc. The tilting-pad thrust bearing is mainly composed of a thrust disc (1), a tilting material layer (2), the elastic disc (3) and a copper ring (4). The copper ring (4) is bonded to the lower surface of the elastic disc (3) and has the functions of supporting the elastic disc (3) and improving the strength of the elastic disc (3). The tilting material layer (2) is bonded to bosses (5) of the elastic disc and used for bearing axial thrust from the thrust disc (1). The tilting-pad thrust bearing has the beneficial effects of being simple in structure, convenient to machine and the like; the integral machining manner is adopted in the elastic disc, and it can be guaranteed that tiles have high planeness; and according to the thrust bearing, the character of deformation coordination of elastic materials is ingeniously utilized, and the thrust bearing has outstanding performance in the aspects of vibration reducing, noise lowering, tile load equalizing, lubricating and the like.
Owner:WUHAN UNIV OF TECH
A split -type human character gear and its planet drive device
ActiveCN111637198BReduce the problem of large fluctuations in stiffnessSolve uneven load distributionToothed gearingsGearing detailsAviationGear wheel
The invention relates to a split-type herringbone gear and a planetary transmission device thereof, which belong to the technical field of mechanical transmission; it includes a radially segmented and assembled herringbone internal gear, an axially separated herringbone external gear, and a gear with a load equalizing effect. Herringbone planetary gear and planet carrier; herringbone planetary gears are arranged on the radially segmented herringbone inner gear, and different herringbone planetary gears are connected through a planet carrier; axially separated herringbone outer gear Mesh connection with herringbone planetary gear. The present invention realizes a herringbone planetary transmission device with controllable stiffness fluctuation and good planetary gear load balance through the mutual cooperation between the phase-adjustable herringbone external gear, the herringbone internal gear and the herringbone planetary gear , which solves the problems of difficult machining, difficult installation and large fluctuations in stiffness of herringbone gears, and provides an effective transmission structure for mining, marine and aviation high-power applications.
Owner:DONGHUA UNIV
A planet carrier structure with flexible floating and load sharing
The invention discloses a planet carrier structure with flexible floating and uniform loading effects. The planet carrier structure comprises a flexible support, connecting bolts, a planet carrier, aninner ring gear, a sun gear and planet gears. The sun gear and the five planet gears are arranged in the planet carrier, the inner gear ring sleeves the planet carrier, and the planet gears are meshed with the inner gear ring and the sun gear respectively. An annular thin plate is arranged on the flexible support, the flexible support is connected with the planet carrier through the connecting bolt, the connecting position is located in a center position of a thickness direction of the planet carrier, and ring plates, elastic washers, inner bushings, intermediate bushings, outer bushings andanti-extrusion rings are arranged at the connecting position, so that the flexible connection is realized. In the meshing process of the planet gears, slight floating can be made in an axial directionand a circumferential direction through the planet carrier, and the load on each planet gear can be balanced, so that the whole planet carrier has a good uniform loading effect. When vibration is generated on a top of an annular thin wall, an effect of relieving vibration and impact is achieved by elastic deformation of the annular thin wall.
Owner:CHONGQING UNIV +1
ww-ngwn differential multi-connected planetary reducer
ActiveCN110030330BExtended service lifeReduce power densityToothed gearingsReduction driveEngineering
The present invention proposes a WW-NGWN differential multi-connected planetary reducer, including a machine base, an input shaft, an output shaft, a center wheel, an inner ring gear, a planetary wheel, and a planet carrier; the center wheel is divided into a first-stage center wheel and a second-stage center wheel The first-level center wheel, the inner ring gear includes the first inner ring gear and the second inner ring gear; the planetary carrier is divided into a first-level planetary carrier and a second-level planetary carrier, and the planetary gear is divided into a first-level planetary gear and a second-level planetary gear; The planetary gear meshes with the first-stage sun wheel and the second-stage sun gear simultaneously to form the first differential output of the first-stage reduction system; the first-stage planetary gear meshes with the first-stage sun wheel and the first ring gear to form the first Two differential outputs; the two-stage planetary gear meshes with the two-stage center wheel, the first ring gear, and the second ring gear simultaneously to form a two-stage reduction system; the second ring gear is fixedly connected to the output shaft. The speed reducer provided by the present invention has the advantages of large reduction ratio, large load capacity and high reliability under the condition of small volume on the premise of possessing the advantages of NGW and NGWN type planetary speed reducers.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
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