347results about How to "Reduce frictional torque" patented technology

The invention relates to a slidable spherical hinge support with great anti-pulling force, comprising a base, a top plate, a support bottom plate, a spherical hinge supporting structure, a force transfer piece and an anti-pulling piece, wherein the spherical hinge supporting structure is positioned in the base; the base and the top plate are integrated into a whole to form a support shell; the support bottom plate is positioned below and fixed with the support shell; the support shell is provided with an inner cavity; the spherical hinge supporting structure, the force transfer piece and the anti-pulling piece are all positioned inside the inner cavity of the support shell, wherein the spherical hinge supporting structure is positioned on the bottom of the inner cavity and is supported on the support bottom plate; the top surface of the spherical hinge supporting structure supports the force transfer piece; a base and a vertical main body of the force transfer piece form a reverse T shape structure as a whole; the anti-pulling piece is arranged around the vertical main body of the force transfer piece and is supported on the base of the force transfer piece; the upper surface of the anti-pulling piece is limited by the inner surface of the top of the support shell; the vertical main body of the force transfer piece passes out from the top surfaces of the anti-pulling piece and the support shell, and is used to be connected with other construction pieces. The spherical hinge support has great anti-pulling force, which is suitable for building structures.

The invention discloses a complex structural well drag-reduction wrenching-reduction compound drilling method. An underground drag-reduction wrenching-reduction device is arranged between an upper-portion drilling rig and a measurement-while-drilling drilling assembly combination, and therefore the upper-portion drilling rig can rotate independently relative to the measurement-while-drilling drilling rig; a reaction torque balancing device is arranged between a power drilling rig and a drill bit, and the disturbance of the reaction torque generated by a power drilling rig to a tool face is eliminated. The complex structural well drag-reduction wrenching-reduction compound drilling method has the advantages that the drag-reduction wrenching-reduction device can change the drill string sliding drilling into rotary drilling during the guiding drilling process, the friction resistance and the torque loss are reduced, and the occurrence rate of complex situations that the drill string is stuck and clamped is reduced; the reaction torque balancing device can effectively eliminate the influence of the reaction torque generated by a power drilling rig on the tool face, the tool face is controlled to be stable, the well track control accuracy is improved, the well body quality is improved, and complex structure well efficient drilling is achieved.

The invention discloses a high-speed rolling contact fatigue testing machine. The high-speed rolling contact fatigue testing machine is characterized in that a driving pulley (6) arranged on the upper end of the output shaft of a servo motor (9) is in transmission connection with a driven pulley (8) arranged on the upper end of a static pressure main shaft (5), and the static pressure main shaft (5) is fixed on an upper beam (30) arranged on a rack (3); a servo electric cylinder (2) is connected with a pressure sensor (36) fixed on the lower surface of a moving beam through a connecting piece (15) of the pressure sensor; the upper end of a hydraulic supporting platform (4) is fixed on a sphere base lower part (18), a lower test specimen base (21) is connected with a sphere base upper part (20), and the lower test specimen base (21) is connected with a test specimen base ring (45) in a clearance fit mode. The high-speed rolling contact fatigue testing machine provided by the invention has the advantages that the rolling contact of a bearing material under a high speed and heavy load working condition is simulated, the key parameter of rolling contact fatigue of a testing material can realize accurate detection, and finally, the data support is provided for evaluating the rolling contact fatigue property of the bearing material.

The invention discloses a composite type automobile hub bearing unit which comprises a flange large inner ring, a small inner ring and an outer ring, wherein the end part of the flange large inner ring is provided with a turned edge; the neck part of the flange large inner ring is provided with a step; the small inner ring is fixed on a shaft neck between the turned edge and the step by the turned edge; the step on the neck part of the flange large inner ring is provided with a conical outer roller path; the small inner ring is provided with a spherical outer channel; the inner side of the outer ring is provided with a conical inner roller path and a spherical inner channel; a tapered roller is arranged between the conical outer roller path and the conical inner roller path; and a ball roller is arranged between the spherical outer channel and the spherical inner channel. In the technical scheme of the invention, a bearing with greater stress at the inner side is designed into a tapered roller type, a bearing with smaller stress at the outer side is designed into an angular-contact ball bearing structure, so that the hub bearing unit hardly has early failure, simultaneously the quality risk brought about by the complex manufacturing can be reduced, and the reliability of a unit assembly can be improved better.

The invention discloses a rolling confluence ring device suitable for transmission with large power. The device comprises an inner conductive wire, an outer conductive wire, an inner shaft, a plurality of layers of confluence assemblies and a mounting assembly, wherein the inner shaft is provided with a cavity; the layers of confluence assemblies are respectively connected with the outer conductive wire and the inner conductive wire, the inner conductive wire is arranged in the cavity of the inner shaft in a penetrating way, the layers of confluence assemblies are connected with the outer conductive wire, the layers of confluence assemblies are mutually insulated, and the inner conductive wire, the outer conductive wire, the inner shaft and the layers of confluence assemblies fixedly form an integral structure through the mounting assembly; and the layers of confluence assemblies are respectively connected with an external power circuit through the outer conductive wire so as to carry out confluence to the inner conductive wire for the external power circuit. By the adoption of the device, the confluence assemblies can be flexibly configured according to a specific use environment to improve conductive power; and meanwhile a friction torque is small, the service life is long, and the device further has the characteristics of high reliability, compact structure, adaptability to transmission with large power and the like.

The invention relates to a device and a method for testing the wire-wound moment of a rotary table. The device for testing the wire-wound moment of the rotary table comprises a rotating platform, a rate gyroscope, a B code, a rotating platform driving unit and a data processing computer, wherein the rotating platform and the B code are electrically connected with the data processing computer respectively; the rotating platform driving unit drives the rotating platform to rotate; and a rotating component to be tested and the rate gyroscope are arranged on the rotating platform, and the rotating component to be tested, the rate gyroscope and the rotating platform rotate synchronously. The device for testing the wire-round moment of the rotary table is simple in structure, and the device and the method for testing the wire-round moment of the rotary table are high in testing accuracy and convenient to operate.

Provided is an inner ring having a first raceway at an outer periphery thereof, an outer ring having a second raceway at an inner periphery thereof, an intermediate ring which is interposed between these, and has a third raceway at an inner periphery thereof and also has a fourth raceway at an outer periphery thereof, first rolling elements interposed between the first raceway and the third raceway, and second rolling elements interposed between the fourth raceway and the second raceway. The intermediate ring includes a larger-diameter ring portion, and a smaller-diameter ring portion formed on the larger-diameter ring portion through an inclined ring portion. The third raceway is formed at a boundary portion between the larger-diameter ring portion and the inclined ring portion, and the fourth raceway is formed at a boundary portion between the smaller-diameter ring portion and the inclined ring portion.

The invention provides a tilting bush thrust bearing with a complex slip surface. The tilting bush thrust bearing comprises multiple bushes; the upper surface of each bush is divided into two areas: an area I near an inlet area and a rest area II, wherein the surface treatment is performed for the area I to form a hydrophobic surface so as to achieve lower limit shearing stress and to be liable to generate the interface slip; the surface treatment is performed for the area II to form a hydrophilic surface so as to achieve higher limit shearing stress and to be not liable to generate the interface slip; after the pressure center change caused by the interface effect and the tilting characteristics of the bushes are considered, the radial and peripheral distribution ranges of the area I are optimally obtained; after a lubricating medium flows from the area I to the area II, as the medium flowing continuity can generate additional pressure peak, the bearing capacity of the tilting bush thrust bearing is improved; as the fluid shearing viscosity in the area I is reduced, the friction torque of the tilting bush thrust bearing is reduced; and the step design in different areas solves the problem of no wear resistance of hydrophobic components in the area I.

There is provided a hydrodynamic bearing assembly including: a sleeve against which a shaft is supported so that an upper end of the shaft, being compressed and inserted into a hub base of a rotor case, protrudes upwardly in an axial direction; a first thrust dynamic pressure generating part formed in at least one of a protrusion and the hub base corresponding to the protrusion, the protrusion being formed at an end of the sleeve along an inner diameter direction; and a second thrust dynamic pressure generating part formed around a protruding end portion of the sleeve, the protruding end portion facing an upper portion of a stopper part in the axial direction and the stopper part rotating together with the rotor case. Also, an oil sealing part has an oil interface between an outer circumferential surface of the sleeve along an outer diameter direction and an inner surface of the stopper part.

The invention relates to a measuring system and a measuring method for a centroid. The system is compact and reliable in structure, and can test a centroid of a tested piece in any state. The method has a simple calculation process and high calculation precision. The system mainly comprises a three-axis air floating moment test bench, a two-dimensional rotating mechanism, a first centroid adjusting mechanism and a second centroid adjusting mechanism. The three-axis air floating moment test bench comprises a support, an air floating bearing, an air floating platform table, a gravity balance adjusting mechanism, and a force sensor assembly. The lower surface of the air floating platform table is provided with the gravity balance adjusting mechanism for adjusting three directions of X, Y, andZ, and a force sensor assembly for measuring force conditions in the X, Y, and Z directions. The two-dimensional rotating mechanism is mounted on the upper surface of the air floating platform table.The first centroid adjusting mechanism is mounted on the lower surface of a loading plate of a pitching portion in the two-dimensional rotating mechanism, and the tested piece is placed on the uppersurface. An azimuth portion of the two-dimensional rotating mechanism is provided with the second centroid adjusting mechanism.

The invention concerns an axial roller bearing (1), in particular an axial needle bearing, consisting essentially of a first annular bearing disk (2) and a second annular bearing disk (3) that are each made of a thin-walled sheet steel and are arranged at a distance from one another on a common center axis (AM), and of a plurality of rolling elements (4) arranged next to one another that roll between the axial inner sides—implemented as races (5, 6)—of the two bearing disks (2, 3) and that are held at uniform distances from one another by a bearing cage (7). According to the invention, the bearing disks (2, 3) of the axial roller bearing (1) are implemented as disk springs that deflect as a function of load and have races (5, 6) positioned at an angle, and are arranged relative to one another such that the rolling elements (4) have low-friction point contact in the unloaded state of the axial roller bearing (1) and only have load-bearing line contact with the races (5, 6) in the fully loaded state of the axial roller bearing (1).

A slide bearing having a simple configuration and low friction torque. A slide bearing (1) for supporting heat rollers, such as a fixing roller and a pressing roller which are used for an image forming device, the slide bearing (1) comprising an outer ring (3) and an inner ring (2). Either the outer ring (3) or the inner ring (2) consists of resin, and the other consists of a sintered metal. The outer peripheral surface of the inner ring (2) is a convex surface, and the inner peripheral surface of the outer ring (3) is a concave surface corresponding to the convex surface. The outer ring (3) is bisected in the radial direction, and the inner ring (2) is sandwiched between the bisected halves of the outer ring (3). The inner peripheral surface of the outer ring (3) and the outer peripheral surface of the inner ring (2) are in sliding contact with each other.