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Hybrid lubricating module
ActiveUS20120082406A1Evenly distributedExtend and improve and lifespanCrankshaftsCrossheadsEngineeringMechanical engineering
A hybrid lubricating module includes a housing and an assembly which consists of at least two elements and has an axial hole run through by a shaft. At least one of the elements has one set of multiple notches on one end surface communicating with the axle hole. The housing has a through axial cavity to encase the assembly. The outer wall surface of the assembly and the inner wall surface of the housing are assembled to each other to form at least one storage chamber to store lubricating media. The multiple notches on at least one adjacent element form at least one set of fine flow passages communicating with the axial hole and the storage chamber.
Owner:NEWCERA TECH
Sliding component
There is provided a sliding component that supplies a sealed fluid to a leakage side in a gap between sliding surfaces to exhibit high lubricity and has a small leakage of the sealed fluid. A sliding component that has an annular shape and is disposed in a place where relative rotation is performed in a rotary machine, includes a plurality of dynamic pressure generating mechanisms provided in a sliding surface of the sliding component, each of the dynamic pressure generating mechanisms including a deep groove portion that communicates with a leakage side, and a plurality of shallow groove portions that communicate with the deep groove portion and are arranged in a circumferential direction in parallel relationship to each other.
Owner:EAGLE INDS
Electromechanical joint for conductor arm having multiple degrees of freedom
An electromechanical joint provides rotational movement in at least two dimensions while conducting electrical power between orthogonal hubs. The joint, shaped as a cross, has four conical shafts positioned orthogonally and apart from each other within an interior of a housing. Apexes of the conical shafts face each other proximate a centroid of the housing. A conductive fluid, such as Galinstan, fills recesses between the conical shafts. Separate yokes attached to pairs of the hubs may impart forces on the shafts, causing the shafts to rotate within the conductive fluid around orthogonal axes. The conductive fluid provides simultaneous conduction of electrical power between the hubs. The yokes may be affixed respectively to a current collector and conductive arms of a work machine for improved movement and power conduction without the need for additional components.
Owner:CATERPILLAR GLOBAL MINING EQUIPMENT LLC
Sliding components
There are provided sliding components that allow sliding surfaces to smoothly slide against each other regardless of whether a relative rotation direction is a forward rotation or a reverse rotation. The sliding components and include: a pair of sliding surfaces and disposed to face each other at a location where a relative rotation takes place when a rotating machine is driven. The sliding surface is provided with a first dynamic pressure generating groove communicating with a radially outer-side space and extending in one circumferential direction, a second dynamic pressure generating groove extending in the opposed circumferential direction, and a conduit groove communicating with the space. The conduit groove includes an annular groove and a communication groove communicating between the annular groove and the space. The second dynamic pressure generating groove is disposed closer to the space than the annular groove, and communicates with the annular groove.
Owner:EAGLE INDS
Magnetic leakage prevention bearing structure
The invention relates to the technical field of magnetic suspension bearings, and provides a magnetic leakage prevention bearing structure which comprises a flux sleeve, a shell, a magnetic part, an inner-layer magnet yoke and an outer-layer magnet yoke. The shell is sleeved outside the flux sleeve, and an inner ring of the shell is provided with a mounting space; the magnetic part is arranged in the mounting space; the inner-layer magnet yoke is arranged in the mounting space and connected with the shell, the inner-layer magnet yoke is concaved inwards to form a first containing groove, and the magnetic part is contained in the first containing groove; the outer-layer magnet yoke is arranged in the installation space and connected with the shell, the outer-layer magnet yoke is concaved inwards to form a second containing groove, and the inner-layer magnet yoke is contained in the second containing groove. A closed magnetic circuit is formed through a double-layer magnet yoke nested structure, the axial magnetic shielding layer design is matched, magnetic flux leakage is effectively restrained, the magnetic field energy utilization rate is increased, electromagnetic interference to external equipment is reduced, and meanwhile the bearing performance and operation stability of the bearing are remarkably improved by optimizing magnet yoke thickness distribution and the permanent magnet arrangement mode.
Owner:CHINA STATE SHIPBUILDING CORP LTD RESEARCH INSTITUTE 719
Crossed roller bearing and isolation block
A crossed roller bearing and an isolation block belong to the technical field of bearings, and are characterized in that oil storage holes are respectively formed in the centers of contact surfaces of two rollers; the four vertical surfaces are respectively provided with a guide oil groove, and the guide oil grooves extend and penetrate through the whole thickness of the corresponding vertical surfaces; and an included angle is formed between the extending direction of the guide oil groove and the central axis of the isolation block, so that a pumping effect is generated when the roller rotates, and lubricating grease is promoted to flow in the guide oil groove. The internal grease storage space of the bearing is optimized, and the internal lubrication state is greatly improved.
Owner:CCTY BEARING COMPANY
Mecanum wheel
A wheel of the present disclosure includes a barrel holder, barrel support shafts, barrels, and bearings. The barrel holder is rotationally driven. The barrel support shafts arranged on the circumference of the barrel holder at an angle to a rotation axis of the barrel holder. The barrels are barrel-shaped rotating bodies. The barrels are rotatably supported on the corresponding barrel support shafts, and outer surfaces of the barrels contact a surface on which the wheel travels as the barrel holder rotates. The bearing supports the retainer. A groove is formed at least in a region of the outer circumferential surface of the barrel support shaft extending in the axial direction and including a radially inner projected area of the retainer.
Owner:NABTESCO CORP
Spherical roller bearing with asymmetric cage pockets
Disclosed is a spherical roller bearing comprising: at least an outer ring and an inner ring; two groups of spherical rollers; and at least one cage configured to retain the spherical rollers, the cage comprising at least one axially inner cage ring, a first axially outer cage ring and a second axially outer cage ring extending in a circumferential direction of the spherical roller bearing, the first axial outer retainer ring and the second axial outer retainer ring are respectively separated from the axial inner retainer ring and are connected to the axial inner retainer ring through a plurality of retainer rods to form a closed cavity; each pocket is configured to receive one spherical roller and has an axially inner pocket side face and an axially outer pocket side face configured to restrain the spherical roller in the axial direction, each cage bar has a curved portion extending in the axial direction in the circumferential direction, the curved portion is at least partially concave, and in the axial direction, the curved portion is at least partially concave. The distance between the vertex of the bending part and the side face of the axial inner cavity lattice is different from the distance between the vertex of the bending part and the side face of the axial outer cavity lattice.
Owner:AB SKF SKF PATENT DEPARTMENT
High-toughness, ultra-pure and large-quenching-depth 40CrNiMoRE rare earth special steel for large ring piece and preparation method of 40CrNiMoRE rare earth special steel
The invention relates to the field of ferrous metallurgy and forge piece manufacturing, in particular to high-toughness, ultra-pure and large-quenching-depth 40CrNiMoRE rare earth special steel for a large ring piece and a preparation method of the high-toughness, ultra-pure and large-quenching-depth 40CrNiMoRE rare earth special steel. The invention relates to a high-temperature-resistant steel material, which comprises the following chemical components in percentage by weight: 0.3 to 0.5 percent of C, 0.1 to 0.5 percent of Si, 0.4 to 0.8 percent of Mn, 0.5 to 1.5 percent of Cr, 0.5 to 1.5 percent of Ni, 0.1 to 0.5 percent of Mo, 0.05 to 0.30 percent of V, 0.0005 to 0.0030 percent of B, 0.005 to 0.030 percent of RE and the balance of Fe and inevitable impurities. Through V, B and RE comprehensive microalloying, molten steel purification, inclusion modification and grain refinement, the hardenability is improved, and the surface quenching layer depth, hardness uniformity and impact toughness are ensured. And moreover, the high-toughness, ultra-pure and large-quenching-depth large ring piece is obtained through preparation technologies such as pure smelting, airtight protection pouring and uniform deformation, and the technical problems that an existing large ring piece is low in purity, poor in toughness, insufficient in hardenability, cracked in surface quenching and the like can be effectively solved.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Linear motor
The present invention relates to a linear motor, the rotor is well sealed through a sealing module when running on the stator slide rail, so that small external dust that affects the operating accuracy and stability performance of linear motor is not easy to enter the sealed space; the lubrication module communicates with the sealed space, so that the linear motor can be effectively lubricated during operation, further improving the operational accuracy and stability of the linear motor; the ball return end cap and the first chute together form a circulation loop for ball movement, the ball retaining plate fits with rotor through locating surface to improve the installation accuracy, meanwhile contact surfaces that limit balls are provided on both sides of the locating surface, so that a ball retaining plate can be used for two rows of circulation loops.
Owner:SHENZHEN CRONUS TECHNOLOGY CO LTD
Rolling and sliding composite bearing
Owner:YANTAI TIANCHENG MASCH CO LTD +1
COOLANT CIRCULATION SYSTEM
PendingDE102025127699A1Cooling/ventillation arrangementElectrical componentsRotational axisVapor–liquid separator
[Problem] Reduction of the stirring resistance that arises in a motor in a coolant circulation system in which an oil-containing coolant circulates to cool and lubricate the motor.[Means of solution] A coolant circulation system 100 comprises: a motor 4 with a rotor 41, a stator 42, a rotating shaft 43 and plain bearings 44; a gas-liquid separator 12, which separates a coolant into CO2 and oil; a CO2 passage 22b, through which the CO2 separated by the gas-liquid separator is supplied to a gap between the rotor and the stator to cool the rotor and the stator; mixing channels 24a, through which a mixture of the CO2 and the oil, obtained by mixing the CO2 and the oil separated by the gas-liquid separator, is supplied to gaps between the rotating shaft and the plain bearings to lubricate the plain bearings; and mixing channels 24b, through which the CO2 supplied to the rotor and the stator from the CO2 channel 22b and the mixture of CO2 and oil supplied to the sliding bearings 44 from the mixing channels 24a are returned to the gas-liquid separator.
Owner:MAZDA MOTOR CORP
Hub bearing
The utility model discloses a hub bearing which comprises an outer ring and an inner ring, a flange plate is connected to the inner ring, a connecting groove is formed in the inner ring, a connecting ring is arranged on the connecting groove in a matched mode, and rolling bodies are arranged between the outer ring and the inner ring and between the outer ring and the connecting ring respectively. A first sealing piece is arranged at the end, close to the flange plate, of the outer ring, a second sealing piece is arranged at the end, away from the flange plate, of the outer ring, one end of the first sealing piece is connected to the inner wall of the outer ring, the other end of the first sealing piece extends towards the inner ring, the first sealing piece is wrapped by a first sealing lip, and a sealing step is formed on the inner ring. A gap is formed between the outer edge of the sealing step and the edge of the outer ring, a plurality of sealing grooves are formed in the side wall of the sealing step, and the first sealing lip extends into the sealing grooves to form a first blocking lip. The sealing device is simple in structure, better in sealing effect, more stable in sealing structure and capable of avoiding early failure of a sealing part.
Owner:C&U CO LTD +3
Silicon nitride sintered body, wear-resistant member using the same, and method for manufacturing silicon nitride sintered body
To have excellent surface workability, and to suppress the difference in workability between a surface and an inside, and processing quality and dimensional variations during mass production processing.SOLUTION: Silicon nitride sintered body has a silicon nitride crystal particle and a grain boundary phase, and when a width is D before the surface processing is performed, a relationship between an average particle diameter dA and an average aspect ratio rA of the silicon nitride crystal particles in a first region from the outermost surface to a depth of 0 to 0.01D, and an average particle diameter dB and an average aspect ratio rB of the silicon nitride crystal particles in a second region inside the first region, are satisfied the following formulas. 0.8≤dA / dB≤1.2, 0.8≤rA / rB≤1.2.SELECTED DRAWING: Figure 1
Owner:NITERRA MATERIALS CO LTD
Sliding components
A sliding surface of a first sliding component and a sliding surface of a second sliding component slide against each other in an intersecting manner such that first positive pressure generation grooves and second positive pressure generation grooves at least partially overlap each other. The first positive pressure generation grooves include at least one groove that differs in a position of a terminating end portion from other grooves. The one groove includes a terminating end portion located closer to a sealed fluid space side than a terminating end portions of the other grooves and terminating end portions of the second positive pressure generation grooves.
Owner:EAGLE INDS
Novel bearing for fan blade main shaft of wind driven generator
The utility model discloses a novel bearing for a fan blade main shaft of a wind power generator, which relates to the technical field of generator bearing equipment, and comprises a bearing seat, a bearing seat base, a bearing cover, a sectional bearing bush, an upper bushing and a lower bushing, the top end of the bearing seat is provided with a circular-truncated-cone-shaped mounting groove, and the bottom end of the bearing cover is a circular-truncated-cone-shaped surface matched with the circular-truncated-cone-shaped mounting groove. A first gap is reserved between the outer wall of the upper bushing and the top wall of the circular-truncated-cone-shaped mounting groove and a first gap is reserved between the outer wall of the lower bushing and the bottom wall of the bearing cover, and a plurality of sectional bearing bushes are movably arranged in the first gaps at equal angles. Compared with the prior art, the service life of the bearing is prolonged, stable and long-acting operation of the wind driven generator is effectively guaranteed, smaller bearing bush segments are adopted, the difficulty in manufacturing, mounting and transporting the bearing bush is reduced, and only a small number of bearing bush segments which break down need to be replaced during maintenance.
Owner:SHAANXI TECHN INST OF DEFENSE IND
Signal processing system and method for automatically adjusting gap between guide bearing bushes
ActiveCN120991970AMachine part testingMaterial analysis using acoustic emission techniquesFault toleranceControl engineering
The invention relates to the field of guide bearing bush control, in particular to a signal processing system and method for guide bearing bush clearance automatic adjustment, and the system comprises a clearance metering module, a model boundary module, a fault learning module, a clearance adjustment module and an oil film lubrication module, the model boundary module is used for establishing a dynamic pressure lubrication model of the guide bearing bush and solving the gap of the guide bearing bush, the fault learning module is used for determining the gap adjustment amount, the gap adjustment module is used for adjusting gap distribution, and the oil film lubrication module is used for adjusting lubricating oil injection. And fault identification and automatic fault-tolerant adjustment are carried out, so that mechanical vibration of the bearing is reduced, operation stability of equipment is guaranteed, abnormal bearing bush gaps are avoided, mechanical efficiency of the bearing is improved, invalid power loss is reduced, service life of the equipment is prolonged, thickness and pressure distribution of a lubricating oil film are improved, and performance of bearing turbine equipment is improved.
Owner:NANCHANG INST OF TECH
Tapered roller bearing machining device and machining process thereof
The invention relates to the field of bearings, in particular to a tapered roller bearing machining device and a machining process thereof. The machining device comprises a supporting ring, the cross section of the supporting ring is in an L shape, a plurality of protruding strips are annularly arranged on the supporting ring, when the bearing is machined, the supporting ring is placed in a horizontal state, an inner ring is placed on the protruding strips, the inner ring is sleeved with an isolation frame, and then the supporting ring supports the isolation frame; at the moment, a plurality of tapered rollers are placed in a plurality of through holes in the isolation frame, the tapered rollers are inserted into the tapered roller path, the outer edge of the supporting ring supports the tapered rollers, and then the outer ring is buckled on the outer sides of the tapered rollers, so that the tapered roller bearing is convenient to assemble and machine. Assembling and machining of a plurality of tapered rollers in the tapered roller bearing are facilitated, and the tapered rollers are prevented from falling off during assembling.
Owner:ZHEJIANG JINGLI BEARING TECH CO LTD
Sliding bearing, wind power main gear box and wind turbine generator
The invention belongs to the technical field of wind power generation equipment, and discloses a sliding bearing, a wind power main gear box and a wind turbine generator. The sliding bearing includes a sliding layer. The sliding layer is deposited on the surface of the first member. When the first component and the second component rotate relatively, a lubricating oil layer is formed between the sliding layer and the second component, and the lubricating oil layer serves as a lubricating film with certain bearing capacity and can separate the sliding layer from the solid surface of the second component, so that dry friction is converted into liquid friction among molecules in the lubricating oil layer; the friction coefficient between the sliding layer and the second component is remarkably reduced, and therefore abrasion between the sliding layer and the second component is reduced. The sliding bearing has the advantages of being small in size, light in weight and good in economical efficiency. The sliding layer is made of the wear-resistant material and is deposited on the first component, so that the sliding layer forms a high-hardness and wear-resistant coating on the surface of the first component, and the service life of the sliding bearing can be prolonged.
Owner:NANJING HIGH SPEED GEAR MFG
Bearing assembly system for vehicle steering systems
A bearing assembly system for a vehicle steering system includes a tubular member having a radially inwardly protruding shoulder, the tubular member having a stake portion angling radially inwardly, the stake portion having a stake surface. The bearing assembly system also includes a bearing disposed within the tubular member and in contact with the radially inwardly protruding shoulder. The bearing assembly system further includes a retainer disposed within the tubular member and in contact with the bearing, the bearing disposed between the retainer and the radially inwardly protruding shoulder, the retainer having an angled surface, the angled surface in flush contact with the stake surface in a fully assembled condition.
Owner:STEERING SOLUTIONS IP HOLDING CORP
Electric cylinder of pure electric servo bending machine
The invention discloses a pure electric servo bending machine electric cylinder, which relates to the technical field of bending machine driving parts, and comprises an electric cylinder body, a transmission assembly, an execution assembly, a lubricating assembly and an anti-rotation assembly, the transmission assembly is matched with a ball screw through a synchronous pulley, a conical screw nut sleeve and a ball screw nut to realize motion transmission; the execution assembly drives an electric cylinder piston to stretch; the lubricating assembly realizes self-circulation lubrication of lubricating oil; the anti-rotation assembly limits radial rotation of the piston through a piston anti-rotation cambered surface. Pure electric servo transmission is adopted, positioning is accurate, response is rapid, an external oil way is not needed, safety risks such as oil leakage are avoided, and maintenance is convenient and fast; stable operation of equipment is guaranteed through self-circulation lubrication, movement stability is improved through an anti-rotation structure, and a conical matching structure is convenient to disassemble and assemble and high in universality. The hydraulic oil cylinder effectively overcomes the defects of an existing hydraulic oil cylinder, is suitable for various high-precision bending machines, and has high practical value.
Owner:WUXI HUADE AUTOMATION CONTROL TECH CO LTD
Anti-deformation crown-shaped retainer of ultra-high-speed motor bearing and manufacturing method of anti-deformation crown-shaped retainer
ActiveCN121273767ABearing componentsManufacturing data aquisition/processingStress concentrationUltra high speed
The invention discloses an ultra-high-speed motor bearing anti-deformation crown-shaped retainer and a manufacturing method, and belongs to the technical field of motor bearings. The super-high-speed motor bearing anti-deformation crown-shaped retainer is formed by printing functionally graded materials, the functionally graded materials comprise a hard-phase material and a soft-phase material, the hard-phase material is glass fibers, and the soft-phase material is nylon 66; the equivalent elastic modulus of the functionally graded material is continuously and gradually changed in the axial direction from the bottom of the pocket to the tail end of the lock claw, so that the elastic modulus of the bottom area of the pocket is higher than that of the tail end area of the lock claw, and elliptical deformation of the pocket and centrifugal deformation of the lock claw are cooperatively restrained. And active reconstruction of a rigidity field of the crown-shaped retainer is achieved, specifically, a tough phase is constructed in a locking claw area to absorb collision energy, a strengthening phase is formed in a pocket area to weaken stress concentration, a rigidity gradient is established at a connecting part to restrain the umbrella-shaped effect, and the crown-shaped retainer with the high toughness-gradient-high strength characteristics and the design method of the crown-shaped retainer are provided.
Owner:XI AN JIAOTONG UNIV
Vertical roller end shaft sleeve lubricated by oil
The invention discloses an oil-lubricated vertical roller end shaft sleeve, and belongs to the technical field of transmission of metal rolling equipment. An inner cavity used for containing a roller flat head is formed in a shaft sleeve body of the shaft sleeve, an oil storage cavity is formed in the bottom of the inner cavity, an oil inlet hole is formed in the shaft sleeve body and communicated with the oil storage cavity, and a quick connector is arranged on the oil inlet hole. The lining plate is fixed to the inner cavity wall of the shaft sleeve body, the outer centering sleeve is fixed to the inserting end of the shaft sleeve body, and the inner centering sleeve is fixed to the connecting end of the shaft sleeve body. A first sealing groove for mounting a first oil seal is formed in the inner wall of the outer centering sleeve; a second sealing groove for mounting a second oil seal is formed in the inner wall of the inner centering sleeve; the lining plate is provided with a matching surface and a mounting surface opposite to the matching surface, the mounting surface is provided with an oil inlet groove extending to the lower end part, and the matching surface is provided with an oil storage groove; and the quick-plug connector, the oil storage cavity, the oil inlet groove, the oil storage groove, the inner cavity of the inner centering sleeve and the inner cavity of the outer centering sleeve form a closed oil way.
Owner:TAIER HEAVY INDUSTRY CO LTD
High-temperature-resistant reusable self-aligning roller bearing
The invention relates to a high-temperature-resistant reusable self-aligning roller bearing, and belongs to the technical field of bearings. A roller is arranged between an inner ring and an outer ring, and the inner ring is made of Al0. 5CrCoFeW0. 5Ni high-entropy alloy; the oxidation resistance, the strength, the stability and the wear resistance during working are met; the outer side surface of the inner ring is subjected to ion implantation modification to form a modified layer of the inner ring; the TiAlN coating reduces energy loss, and the first Ag coating is used for conducting heat and reducing oxidation loss; the outer ring is made of an Al < 0.5 > CoCrFeV < 0.5 > Ni high-entropy alloy; the high bearing capacity, the wear resistance, the fatigue resistance, the dimensional stability and the corrosion resistance in the working process are met; the modified layer on the inner side surface of the outer ring is used for improving the surface hardness and enhancing the wear resistance; the CrAlN coating is used for improving oxidation resistance, and the second Ag coating is used for conducting heat and reducing oxidation loss; the roller is made of an AlCoCrFeNi2. 1Nb0. 6 high-entropy alloy; a lubricating structure on the surface of the roller comprises an annular groove and graphite fluoride; a lubricating film is formed when the raceway and the roller rub each other, and the integrity of the lubricating film is maintained.
Owner:HARBIN INST OF TECH
Hydraulic retarder
This invention relates to the field of retarder technology, and more particularly to a hydraulic retarder. The hydraulic retarder includes a housing, a rotor shaft, a stator, a rotor, and a flow disruptor. The housing has a cavity, and the rotor shaft rotatably passes through the cavity, with a drive gear at one end extending out of the cavity. An external splined gear is located at the end of the rotor shaft within the cavity. The stator is fixedly mounted on the housing and fitted onto the rotor shaft, with the stator blades sealingly extending into the cavity. The rotor is located within the cavity and meshes with the external splined gear for transmission. The rotor is rotatably fitted onto the stator, and the rotor blades are fixedly clearance-fitted with the stator blades to form a working chamber. The flow disruptor is retractably positioned within the fixed gap between the stator and the rotor. The flow disruptor extends into the working chamber after the hydraulic retarder exits operation or exits the working chamber when the hydraulic retarder enters operation. This shortens the response time for entering and exiting operation, and reduces the no-load loss of the hydraulic retarder through the flow disruptor.
Owner:FAW JIEFANG AUTOMOTIVE CO
Rolling-element bearing with seals and purging channel
A rolling-element bearing includes first and second concentric ring assemblies and rolling elements supporting the ring assemblies for relative rotation. The first ring assembly includes a first rolling ring and a first sealing ring mounted axially to the first rolling ring and supporting a first seal element and a second seal element, and the second ring assembly includes a second rolling ring and a second sealing ring mounted axially to the second rolling ring. The first seal element includes a first lip in contact with the second sealing ring and the second seal element includes a second lip in contact with the second sealing ring, the first and second lips delimiting a first chamber between the first and second sealing rings, A first purging channel extends from an inlet at the first chamber to at least one outlet in at least one external surface of the second rolling ring.
Owner:AB SKF SKF PATENT DEPARTMENT
A water cooling system for the rotor of a low-speed, high-torque permanent magnet synchronous motor
ActiveCN117856493BMagnetic circuit rotating partsSynchronous machine detailsCoolant flowElectric machine
This invention discloses an internal water channel cooling system for a low-speed, high-torque permanent magnet synchronous motor rotor. The system includes an internal water channel cooling device, a bearing, and a waterproofing device. The internal water channel cooling device is fixed to the inner wall of the rotor and rotates at the same speed as the rotor. The inner ring of the bearing is connected to the inlet end of the internal water channel cooling device, and the outer ring of the bearing is connected to the outlet end of the external water channel. Coolant flows from the external water channel along the gap in the middle of the inner ring of the bearing to the internal water channel cooling device. The connection between the water channels at both ends of the bearing is sealed off by the waterproofing device. This invention sets up internal water channels inside the motor and extends the flow path of the coolant within the channels using baffles, increasing the coolant flow distance and thus improving the cooling effect. This solves the problem of temperature rise in the permanent magnet part, which has the greatest impact on the performance of the permanent magnet synchronous motor, thereby improving the performance of the permanent magnet synchronous motor.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Rolling-element bearing with seals and leakage test channel
A rolling-element bearing includes first and second concentric ring assemblies mounted for relative rotation. The first ring assembly includes a first rolling ring and a first sealing ring supporting first and second seal elements each having a lip. The second ring assembly includes a second rolling ring and a second sealing ring contacted by the lips of the first and second seal elements. The first sealing ring includes a first sealing member radially spaced from the first seal element and a first leakage test channel having an inlet between the first sealing member and the first seal element and an outlet at an external surface of the first sealing ring, and / or the second sealing ring includes second and third sealing members and a second leakage test channel having an inlet between the second and third sealing members and an outlet at an external surface of the second sealing ring.
Owner:AB SKF SKF PATENT DEPARTMENT
Rotor shaft for a rotor of an electric machine
The invention relates to a rotor shaft (1) for a rotor (2) of an electric machine (3), in particular for use in an electrically operable drive train (4) of a motor vehicle (5), the rotor shaft comprising a circumferential toothing (6) which is formed monolithically with the rotor shaft (1) and which can be brought into meshing engagement with a corresponding toothing (7) in order to transmit a torque, and a first bearing seat (8) formed on the rotor shaft (1) and a second bearing seat (9) formed on the rotor shaft (1), wherein the toothing (6) of the rotor shaft (1) is arranged axially between the first bearing seat (8) and the second bearing seat (9), wherein a first rolling bearing (10) having an inner ring (11), connected to the rotor shaft (1) for conjoint rotation therewith, is arranged on the first bearing seat (8), and wherein a raceway (12) for rolling elements (14) guided in a cage (13), on which raceway the rolling elements (14) roll, is formed on the second bearing seat (9).
Owner:SCHAEFFLER TECHNOLOGIES AG & CO KG
Sliding component
An annular sliding component disposed at a relative rotation point of a rotating machine, includes a plurality of positive pressure generation grooves arranged side by side in a circumferential direction on a sliding surface of the sliding component. The positive pressure generation grooves are configured for generating positive pressure by a sealing target fluid on the sealing target fluid side being introduced during the relative rotation of the sliding component and a sliding component. The positive pressure generation grooves have a plurality of leading edge portions at leading edges on a downstream side in a direction of the relative rotation. The plurality of leading edge portions are arranged side by side in the circumferential direction. At least part of the plurality of leading edge portions is disposed at different radial positions.
Owner:EAGLE INDS