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

The invention discloses a radial-axial three-degree-of-freedom alternating current-direct current hybrid magnetic bearing used for non-contact suspension bearing. An axial control coil is arranged between a radial stator core and an axial stator core; an axial air gap is formed between the axial stator core and the end face of a rotor in the axial direction; three same stator core magnetic poles uniformly distributed in the circumferential direction extend from the wall of an inner cavity of the radial stator core to the axle center; same radial control coils are wound on the three stator core magnetic poles, and radial air gaps are formed between the stator core magnetic poles and the outer wall of the rotor in the radial direction; same axially magnetized annular permanent magnets are arranged between two axial sides of the radial stator core and the axial stator core; and S poles of the permanent magnets face the radial stator core, and N poles of the permanent magnets face the axial stator core. The radial-axial three-degree-of-freedom alternating current-direct current hybrid magnetic bearing integrates axial and radial functions, is only driven by a three-phase alternating current power inverter, is provided with two axially magnetized annular permanent magnets, controls the magnetic flux not to pass magnetic poles where the permanent magnets are positioned, and has the advantages of low power consumption, small volume, light weight and high bearing capacity.

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 radial-axial three-degree-of-freedom alternating current-direct current hybrid magnetic bearing used for non-contact suspension bearing. An axial control coil is arranged between a radial stator core and an axial stator core; an axial air gap is formed between the axial stator core and the end face of a rotor in the axial direction; three same stator core magnetic poles uniformly distributed in the circumferential direction extend from the wall of an inner cavity of the radial stator core to the axle center; same radial control coils are wound on the three stator core magnetic poles, and radial air gaps are formed between the stator core magnetic poles and the outer wall of the rotor in the radial direction; same axially magnetized annular permanent magnets are arranged between two axial sides of the radial stator core and the axial stator core; and S poles of the permanent magnets face the radial stator core, and N poles of the permanent magnets face the axial stator core. The radial-axial three-degree-of-freedom alternating current-direct current hybrid magnetic bearing integrates axial and radial functions, is only driven by a three-phase alternating current power inverter, is provided with two axially magnetized annular permanent magnets, controls the magnetic flux not to pass magnetic poles where the permanent magnets are positioned, and has the advantages of low power consumption, small volume, light weight and high bearing capacity.

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 discloses a single winding hybrid outer rotor magnetic levitation switched reluctance motor for a flywheel battery. A hybrid outer rotor is disposed outside a stator. The hybrid outer rotor is encapsulated on the inner side of a flywheel in an overlying manner and integrally combined with a flywheel rotor. The hybrid outer rotor is of an integrated structure axially formed by a salient pole rotor and a disc rotor. No windings exist on the hybrid outer rotor. Toothed poles are evenly distributed on the salient pole rotor. No salient poles exist on the disc rotor side. The disc rotor is disposed on the gravity side close to the flywheel rotor. The axial length of the salient pole rotor is 1-4 times of that of the disc rotor. The single winding hybrid outer rotor magnetic levitation switched reluctance motor has the advantages that by the differential excitation of radial anti-pole winding, radial controllable levitation of the flywheel can be achieved, mechanical-electric energy conversion can be achieved, levitation support force, power generating efficiency and motor power density are increased effectively, and the winding and switch inverter circuit structure is simplified.

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 discloses an electric spindle system supported by double radial six-pole hybrid magnetic bearings with different magnetic pole surfaces, which drives a rotating shaft to rotate, and radial-axial magnetic bearings which have the same structure and are symmetrical relative to the central point of a high-speed spindle motor are respectively arranged on the left side and the right side in the axial direction of a high-speed spindle motor; the first radial-axial magnetic bearing on the axial right side is composed of a first radial magnetic bearing, a first annular permanent magnet and a first conical magnetic bearing which are sequentially arranged in the axial direction, the first radial magnetic bearing is close to the high-speed spindle motor, and the first conical magnetic bearing is composed of a first conical stator, a first conical rotor and a first conical magnetic bearing control coil; and the conical outer surface of the first conical rotor and the inner surface ofa first conical stator magnetic pole are conical, and the large end of the conical inner surface of the first conical stator magnetic pole is close to the first radial magnetic bearing. The conical magnetic bearing is adopted to replace an axial magnetic bearing, a thrust disc can be removed, the axial length of the rotor is shortened, and the critical rotating speed of the rotor can be increased.

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 discloses a hub module of mining equipment, and belongs to the technical field of bearing structures. The hub module comprises an outer ring and an inner ring for oppositely rotating; the inner ring is sleeved in the outer ring, and is coaxially arranged with the outer ring; a cage is arranged between the outer ring and the inner ring; a flange with a mounting hole is arranged at one end of the outer ring; the other end of the outer ring is leveled with the axial end surface of the inner ring; an annular inner slide way is peripherally formed in the inner side of the outer ring; an annular outer slide way is peripherally formed in the outer side of the inner ring; a slide body is arranged between the inner slide way and the outer slide way; the slide body comprises multiple slide blocks with arc structures; the slide blocks are provided with upper curved surface parts bonded corresponding to the outer slide way, and lower curved surface parts bonded corresponding to the inner slide way; a baffle plate is arranged in a shaft hole, at one end of the flange, of the outer ring; the baffle plate is extruded and pressed with the outer ring through a stop retainer ring; and the baffle plate is provided with an annular projection in interference fit with the axial end surface of the inner ring. The hub module adopts a full-contact surface rolling body, and can satisfy the use demands of a rotating part with low speed, heavy load and high load change in the process.

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 discloses a ferry vehicle traveling wheel convenient to install, and belongs to the technical field of aerated concrete production, the ferry vehicle traveling wheel comprises a traveling wheel body, a shaft is arranged on the inner wall of the traveling wheel body, two pairs of symmetrical shaft sleeves are arranged at the outer end of the shaft, a half coupling is arranged on one side of the shaft, and a pair of bilaterally symmetrical bearing glands is fixedly connected to the outer side of the traveling wheel body; the ends, close to each other, of the pair of bearing glands are fixedly connected with self-aligning roller bearings, two pairs of symmetrical bearing chambers are arranged outside the walking wheel body, the bearing chambers are fixedly connected with the self-aligning roller bearings, the outer end of the shaft is fixedly connected with a code disc, and the outer end of the walking wheel body is fixedly connected with a code disc detection assembly. The current situation that quick-wear parts of the traveling wheels are not easy to replace can be changed, the stability of the whole wheel train is improved, and the traveling crane is ensured to travel more smoothly, so that the workload of workers is reduced, the maintenance and repair of a production line are simplified, and the production efficiency is improved.

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 a rolling needle lead screw. The rolling needle lead screw comprises a lead screw and a slide sleeve, wherein the slide sleeve coats the lead screw, and has a slide hole; the slide sleeve comprises multiple travel roller mechanisms and multiple support roller mechanisms arranged along the inner wall of the slide hole; the support roller mechanisms comprise multiple rotating grooves arranged along the inner wall of the slide hole in an array form; rolling columns A are rotationally embedded in the rotating grooves; one sides of the rolling columns A are embedded in a spiral groove of the lead screw; the travel roller mechanisms comprise an annular slide groove formed in the slide sleeve; multiple rolling columns B are embedded in the slide groove; an opening communicated with the slide hole is formed in the slide groove; the rolling columns B are contacted with the spiral groove of the lead screw through the opening; the travel roller mechanisms comprise transparent support rings arranged on the annular inner wall of the slide groove; and the middle parts of the transparent support rings are fixed with a laser displacement sensor for monitoring the moving speed of an array of the rolling columns B.

The invention discloses a radial hybrid magnetic bearing of a slice rotor. The radial hybrid magnetic bearing is characterized in that the slice rotor is sleeved with a radial stator disc in a hollow manner, and the radial stator disc is composed of a radial stator cylinder and three radial stator pieces, and the three radial stator pieces are successively fixed on the inner wall of the radial stator cylinder along the axial direction; a first axial cavity is arranged between a first radial stator piece and a second radial stator piece, a second axial cavity is reserved between the second radial stator piece and a third radial stator piece, and radial control coils are arranged in the two axial cavities; the slice rotor is composed of a rotor magnet yoke and a permanent magnet, the rotor magnet yoke is coaxially closely nested outside the permanent magnet, and the permanent magnet is of a hollow cylinder shape and is radially filled with magnetism; the permanent magnet provides static bias flux, the radial control coils provide radial control magnetic flux, and the radial control magnetic flux and the static bias flux are overlapped at radial gaps. The radial hybrid magnetic bearing provided by the invention has the advantages that a radial magnetism filling permanent magnet is adopted, the spaces of the radial control coils are reduced, and the radial bearing capacity is increased.

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.

The invention discloses a bearing system of mining machinery, and belongs to the technical field of bearing structures. The bearing system comprises an outer ring and an inner ring which oppositely rotate, wherein the inner ring is sleeved by the outer ring and is coaxial with the outer ring; a retaining frame is further arranged between the outer ring and the inner ring; a ring-shaped inner slide path which is arranged in the peripheral direction of the outer ring is arranged inside the outer ring; a ring-shaped outer slide path which is arranged in the peripheral direction of the inner ring is arranged outside the inner ring; a slide body is positioned between the inner slide path and the outer slide path; the slide body comprises a plurality of slide blocks which are of circular-arc-shaped structures; and an upper curved-surface body which correspondingly fits to the outer slide path and a lower curved-surface part which correspondingly fits to the inner slide path are arranged on the slide block. The bearing system is low in processing cost, is simple in structure, and is great in radial bearing force; and surface-contact sliding is used, so that the defects of a rolling bearing in the prior art are solved, and popularization and application of agricultural machinery and mining machinery can be met.

The invention discloses a one-dimensional micrometric displacement device, and relates to a micrometric displacement device, solving the problems of small radial stiffness of a flexible hinge, small radial bearing capacity and difficulty of accurately controlled output of the existing micrometric displacement device. The connecting shaft of the one-dimensional micrometric displacement device is positioned in a working hole of a base; a front strain gage and a rear strain gage are arranged in parallel; a first inner ring and a second inner ring are respectively fixed in shoulders at two ends of the connecting shaft; a front end cover and a rear end cover are respectively connected with the shoulders of the connecting shaft through the first inner ring and the second inner ring; the first inner ring and the second inner ring are respectively fixed at two ends of the base; and the second inner ring is fixedly connected with the rear end cover. The device of the invention can be widely applicable to the occasions in ultra-precision finishing for provision of error compensation, precise microscale feed and the like.