35results about How to "Improve the radial bearing capacity" patented technology

The invention relates to a composite-structure bearingless switched reluctance motor and a control method thereof and belongs to the field of bearingless switched reluctance motors and control methods thereof. A torque stator and a levitation stator are axially stacked to form a stator; a winding is wound on teeth of the stator and passes the torque stator and the levitation stator, and the winding is wound in a central winding manner; a rotor comprises a torque rotor and a levitation rotor, the torque rotor and the levitation rotor are axially stacked in the stator, the torque rotor is located below the torque stator, the torque stator and the torque rotor are equal in axial length, and the levitation stator corresponds to the levitation rotor while the levitation stator and the levitation rotor are equal in axial length; the levitation stator is in a pole shoe structure, and the polar arc angle of the levitation stator is larger than that of the torque stator. Levitation and torque decoupled control is achieved; the control method is simple; radial bearing force is large; the motor is fine in levitating performance. Levitation control is achieved by minimum inductance zone; the levitating current has low effect on torque current, and interphase coupling effect is low.

The invention provides a permanent-magnet biased hybrid magnetic bearing switch reluctance motor. A torque stator and a suspension force stator of the motor are axially superposed, and a torque rotor and a suspension force rotor of the motor are axially superposed; each of the torque stator and the suspension force stator both is of a salient pole structure and provided with twelve teeth; the torque rotor is of the salient pole structure and provided with eight teeth, while the suspension force rotor is of a cylindrical structure; windings, twelve in total, are wound around a stator tooth formed by the torque stator and the suspension force stator; an annularly magnetized permanent magnet is placed on each of twelve stator yokes, or a radially magnetized permanent magnet is placed on each of twelve suspension force stator teeth. The motor is characterized in that decoupling of torque and suspension force is realized structurally and convenient control is achieved, permanent magnets are used for providing biased magnetic flux and large radial bearing capacity is realized, and the influence of motional electromotive force on current chopping control is eliminated, and good current control effect and good high speed adaptability are achieved.

The invention discloses a drainage tube and a flushing guide pipe. The drainage tube comprises a drainage section for guiding accumulated fluid to outflow, a middle section for controlling a stretch-in position and positioning the stretch-in position and an exporting section for exporting and collecting fluid, wherein the drainage section, the middle section and exporting section are sequentially and seamlessly connected with one another; the tube body inner surface of the drainage section is provided with a first radial supporting structure for supporting the drainage section tube body and maintaining the drainage section in the radial direction, and a drainage opening which is used for guiding the accumulated fluid into a drainage cavity is formed in the outer surface of the drainage section; the tube body inner surface of the middle section is provided with a second radial supporting structure for supporting the tube body of the middle section and maintaining the middle cavity of the middle section smooth. The drainage section stretches into the fluid accumulated part, the drainage opening is formed in the drainage section, the accumulated fluid successfully enters the inner cavity of the drainage section by virtue of the drainage opening, and the accumulated fluid is led out.

The invention relates to an oil static pressure main shaft for shaft oil supply, which belongs to the mechanical engineering technical field. The invention is characterized in that the oil static pressure main shaft for shaft oil supply is composed for the main shaft, a front end cover, a regulating ring, a bearing bush, a rear end cover and a bush seat. The high pressure oil is directly entered into an oil chamber of the bearing bush through an oil nozzle, an oil orifice is drilled on the main shaft, therefore the high pressure oil is supplied to the radial oil chamber through the oil orifice of the main shaft for thrusting the oil chamber. The main shaft is suspended in the bearing bush by an oil membrane, the hydraulic oil flowed out of the oil chamber is returned back to a hydraulic station through an oil return hole of the bearing bush. The oil static pressure main shaft has the effect and performance that a restrictor and a bush sleeve are removed, the shaft but the bush sleeve is used for oil supply, and the structure is simplified. The oil static pressure main shaft solves the obstruction problem of the restrictor and reduces the complex degree of mechanical treatment and assembly process.

The invention provides a design method of a cross cylindrical roller bearing with two right-angle roller paths. An outer ring (1) is designed in an integral structure by a split type dual-half structure. The outer ring comprises two right-angle roller paths, an outer mounting hole (1.1), an outer hoisting thread hole (1.2), a lubricating oil hole (1.3), a plunger (6) and a conical pin (7). An inner ring comprises two right-angle roller paths, an inner mounting hole (2.1) and an inner hoisting thread hole (2.2). A cylinder roller (3) and an isolation block (5) are configured in the corresponding roller paths of the inner ring and the outer ring. Sealing is carried out through a sealing assembly (4), so that the problems of a plurality of machining processes, poor mounting condition, poor sealing, no lubrication and the like in a cross cylindrical roller bearing with a single roller path can be solved. Therefore, the axial bearing force and the overturn moment can be ensured, and simultaneously the radial bearing force is greatly improved.

The invention relates to the field of bearings and provides a combination bearing for a disc-shaped elevator tractor. The combination bearing comprises an inner bearing ring and a first outer bearing ring and a second outer bearing ring which are located on the inner bearing ring; the first outer bearing ring and the second outer bearing ring are closely arranged along an axial direction of the inner bearing ring; a radial cylindrical roller component is arranged between the first outer bearing ring and the inner bearing ring; a ball bearing component is arranged between the second outer bearing ring and the inner bearing ring; a first sealing ring is arranged between the first outer bearing ring and the axial outer end of the inner bearing ring; a second sealing ring is arranged between the second outer bearing ring and the axial outer end of the inner bearing ring. The combination bearing is mainly designed for the machinery, such as the elevator tractor; the combination bearing can simultaneously bear the radial load and the axial load, and is especially suitable for the occasions with higher rotating speed and higher axial load; the assembling and disassembling are simple and the bearing capacity is ultrahigh; the combination bearing has an excellent sealing effect and can guarantee that the lubricating grease does not leak in the running process of the bearing.

The invention relates to a knuckle bearing structure. The knuckle bearing structure comprises an outer ring with a pulling rod, wherein the outer ring is internally provided with an inner ring. The knuckle bearing structure is characterized in that the inner sides of the two ends of the outer ring are respectively provided with a gap; the length of the gap corresponds to the outer diameter of the inner ring; the width of the gap corresponds to the thickness of the inner ring; the inner ring is placed in the outer ring by the gaps; and the outer ring and the inner ring form matched spherical-surface contact. The knuckle bearing structure has the advantages that the inner sides of the two ends of the outer ring are respectively provided with the gap, the length of the gap corresponds to the outer diameter of the inner ring, the width of the gap corresponds to the thickness of the inner ring, the inner ring is horizontally placed in the gaps and is placed into the outer ring by rotation, and the outer ring and the inner ring form matched spherical-surface contact, and since the inner ring is placed into the outer ring by rotation, the separation of the inner ring and the outer ring is conveniently realized, the convenient replacement of the inner ring or the outer ring is realized and the production cost is effectively reduced.

The invention relates to the field of bearings, in particular to a combination bearing suitable for an elevator disc tractor. The combination bearing comprises a bearing inner ring, a first bearing outer ring and a second bearing outer ring, wherein the first bearing outer ring and the second bearing outer ring are positioned on the bearing inner ring, the first bearing outer ring and the second bearing outer ring are arranged in the axial direction of the bearing inner ring in a gathered manner; a radial cylindrical roller assembly is arranged between the first bearing outer ring and the bearing inner ring, a ball bearing assembly is arranged between the second bearing outer ring and the bearing inner ring, four-point contact of the ball bearing assembly in the radial direction and the axial direction is achieved, and it is necessary to note that four-point contact is that two end points, in the axial direction of the bearing inner ring, of the ball bearing assembly and two end points, in the radial direction of the bearing inner ring, of the ball bearing assembly make contact with a component to form positioning. The combination bearing is mainly designed for the elevator tractor and other machines; due to the fact that the combination bearing can bear radial loads and axial loads at the same time, the combination bearing is especially suitable for occasions where the rotating speed is relatively high and relatively large axial loads exist; and the combination bearing is easy to mount and demount and very high in bearing capacity.

The invention relates to the technical field of psychological education, in particular to a sand table with the height adjusting function for college student psychological education. The sand table comprises a base, a threaded rod, a vertical rod and a sand table. A stepping motor is arranged at the upper part of the base, and supporting columns and supporting rods are further fixed at the upper part of the base through bolts; and the supporting columns are plugged to bearing plates in a matching manner. A supporting block is arranged between the two bearing plates in a clamped mode, and a sand table body is fixedly connected to the upper portion of the supporting block in a glued mode; a vertical rod is fixed to the bottom of the supporting block through a bolt, the bottom of the verticalrod is welded to a connecting block, a bearing is fixedly glued in an inner circular hole formed in the connecting block, and a threaded block is arranged in an inner ring of the bearing in a matchedmode; the threaded block is connected with the threaded rod in a matched mode, and operation of the threaded rod is controlled by a stepping motor. The stepping motor is controlled to drive a rotating shaft and a belt to operate, under the connection effect of a vertical rod, the supporting block and the sand table body are pushed to move upwards in position height, and the purpose of adjusting the position height of the sand table is achieved.

The invention provides a rod end spherical plain bearing structure. Through the use of the structure, external dimensions of the whole rod end spherical plain bearing and wall thickness of an outer ring are ensured at the same time, the bearing capacity of the rod end spherical plain bearing is improved, the separation of an inner ring and the outer ring is conveniently realized, the convenient replacement of the inner ring or the outer ring is realized, and the production cost is effectively reduced. The structure comprises the outer ring with a pull rod, and the inner ring is arranged in the outer ring; and the structure is characterized in that breaches are respectively formed in the inner sides of the both ends of the outer ring, the length of the breaches and the outer diameter of the inner ring are corresponding, the width of the breaches and the thickness of the inner ring are corresponding, the inner ring is put into the outer ring through the breaches, and anastomotic spherical contact is formed between the outer ring and the inner ring.

The invention relates a kind of belt roller especially relates a kind of one-way belt roller used in cars. It has a shell and a mandrel and there is installing a one-way pillow between the shell and the mandrel; there is installed and fixed dust prevention cover; the internal sleeve of one-way pillow said above and the mandrel are the integral construction; the outer coating of one-way pillow has none edge fold and there is bindingly setting up a baffle ring at the two side faces of outer coating; there are setting up a base bearing and a supplementary bearing individually at the two terminals of one-way pillow. The one-way belt roller said about the invention has the merits like convenience assemblage, good wear-resisting property and long useful life period.

The invention discloses a double-circular table magnetic bearing rotor. The double-circular table magnetic bearing rotor comprises a rotor body, and different from the prior art, the rotor body is characterized in that the bottom surfaces of two same circular tables are connected in an overlapping manner to form a double-circular table structure, an included angle between slope buses and axes of the two circular tables is alpha, and alpha is larger than or equal to 15 degrees and is smaller than or equal to 45 degrees. According to the magnetic bearing rotor, the double-circular table structure is adopted, so that radial bearing force is greatly improved, and axial and radial coupling interference is reduced.

The invention relates to a non-mechanical-contact magnetic bearing, and discloses a radial large-bearing-capacity hybrid magnetic bearing. The hybrid magnetic bearing comprises a stator and a rotor located on an inner ring of the stator, wherein the stator comprises a left radial stator core, four axial cores which are distributed on the circumferential edge at equal intervals and are the same insize, a right radial stator core and a non-magnetic-conductive shell. The rotor comprises a left rotor core, an axially-magnetized permanent magnet ring, a right rotor core and a rotating shaft. According to the bearing, static bias magnetic flux is provided by the axially-magnetized rotor permanent magnet ring, and corresponding bias magnetic flux is adjusted by radial control magnetic flux generated by electrifying a radial control winding; and a radial magnetic pole of the hybrid magnetic bearing with the structure has no winding, the area of the magnetic pole can be designed to be maximum,the radial bearing capacity is effectively increased, the axial length is reduced, the size is small, the structure is compact, the critical speed is high, and the suspension force density is large.

The invention discloses a tip device with large radial bearing force. The tip device comprises a tip unit and a tip base, and the tip unit is installed on the tip base; a morse tapered hole is formedin the tip base and used for the tip unit to be placed in; the tip unit comprises a tip core, and a first bearing installing area, a second bearing installing area and a third bearing installing areaare successively arranged on the tip core. The radial bearing force of the tip device is greatly improved, so that the maximum ribbon rolling weight of a ribbon rolling machine every time is increased, the frequency of lap changing is reduced, the loss on defective products is reduced, and the social benefit of the tip device is huge.

The invention relates to a super-overloading high-speed rail bearing, and provides the super-overloading high-speed rail bearing with a spherical roller center ball. The super-overloading high-speed rail bearing with the spherical roller center ball comprises an inner sleeve ring, two double half outer sleeve rings, a circle of convex symmetrical roller and two circles of convex asymmetrical rollers, wherein after the two double half outer sleeve rings are coaxially combined, inner circumferences of the two double half outer sleeve rings form a shared spherical roller orbit, the curvature radius of the shared spherical roller orbit is larger than the radius of a roller circumference orbit, and the axial cross section of the shared spherical roller orbit is of an ellipsoidal structure; a circle of spherical roller orbit is arranged in the middle of the outer circumference of the inner sleeve ring perpendicular to a bearing axis; an axis of a spherical roller arranged in the orbit is symmetrical to the bearing axis; a circle of spherical roller orbit is arranged at each of two ends of the spherical roller orbit; the two rows of spherical roller orbits and a vertical axis of the bearing form an angle of 1-20 degrees; and the inner sleeve ring is combined with the shared spherical roller orbit arranged on the inner circumferences of the double half outer sleeve rings through threerows of spherical roller so as to form a spherical roller bearing structure of an ellipsoidal spherical roller orbit. According to the super-overloading high-speed rail bearing with the spherical roller center ball, by utilizing the convex symmetrical roller center ball, the carrying capacity is improved, the friction force is reduced, and a joint load is carried by convex asymmetrical roller bearings arranged at two ends of the center ball, so that the super-overloading high-speed rail bearing is formed.

The invention provides an asymmetric air bearing for a built-in pitching mechanism, and belongs to the technical field of bearings. The bearing system comprises an air bearing and a supporting rod, wherein the air bearing comprises a bearing shell, a bearing bush, a bearing stator, an upper end cover and a lower end cover, the bearing bush is in interference fit with the bearing stator, the bearing shell is arranged outside the air bearing, the upper end cover and the lower end cover are fixedly installed at the two ends of the bearing shell through bolts correspondingly, and the supporting rod is connected to the air bearing. The air bearing is of an asymmetric air bearing structure, and asymmetry of the air bearing is reflected in the aspects of asymmetric structure in the circumferential direction, uneven distribution of shallow cavities, unequal sizes, unequal depths, unequal diameters of throttling holes and the like, a radial air return hole and a fan-shaped groove with a certain opening angle are formed in the middle position of the air bearing in the direction of the supporting rod, and the static balance position of the asymmetric air bearing is adjusted by changing the size of the fan-shaped groove. Compared with an existing device, the air bearing has the advantages of being low in damping and large in dynamic bearing capacity.