38results about How to "Good load balance" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.