13results about How to "Increase limit speed" patented technology

The utility model discloses a lead screw nut structure of a high-speed machine tool and the high-speed machine tool, the lead screw nut structure comprises a lead screw nut arranged on a lead screw in a sleeving mode, the lead screw nut is connected with a transmission mechanism of the machine tool, and the transmission mechanism drives the lead screw nut to rotate; wherein the transmission mechanism comprises a driving motor; the bearing sleeve is arranged on the lead screw nut in a sleeving mode, and the bearing sleeve is fixedly connected with the machine tool; wherein the bearing sleeve is provided with a cooling channel, and the cooling channel comprises an oil inlet and an oil outlet; and the connecting assembly is arranged between the lead screw nut and the bearing sleeve. Through the lead screw nut structure, the operation efficiency and stability of a machine tool can be improved.

The utility model relates to the field of fans, in particular to a wave-shaped coil fan blade which comprises a middle disc, blade sets arranged along the outer edges of the two end faces of the middle disc in the circumferential direction and air rings connected to the outer side edges of the blade sets. An air cavity is formed between the middle disc and the blade sets on the two sides of the middle disc, an enclosed area in the air ring forms the air inlet, and an air outlet is formed between every two adjacent blades in the blade sets. At least the circumferential edge of the middle disc is constructed to be in a wave shape regularly fluctuating in the axial direction, and the roots of the blade sets on the two sides are connected to the wave-shaped circumferential edge of the middle disc. According to the scheme, the circumferential edge of the middle disc is made into the wave shape, the overall strength of the edge of the middle disc is improved, the anti-falling height of the wind wheel is increased, and the limit rotating speed of the wind wheel is increased.

The invention provides a built-in permanent magnet synchronous motorized spindle optimization design method for a high-precision numerical control machine tool, and aims to solve the problem that a conventional motorized spindle structure cannot adjust an axial preload and a radial external load in real time. The structure of the motorized spindle is optimally designed from three aspects of high-speed ceramic ball mixed bearing materials, axial preload real-time compensation and radial external load real-time compensation. The dynamic characteristics of the rotor system can be improved, and shafting vibration can be actively inhibited.

The application discloses a processing method of a bearing with anti-fretting damage, and belongs to the technical field of bearings. The bearing comprises rollers and raceways, and comprises the following steps: 1) the bearing rollers are designed as hollow rollers, and the geometric sizes of the rollers are obtained through three-dimensional simulation optimization of mathematical models and physical models; 2) special surface heat treatment is performed on the rollers, and the smoothness of the roller contact surface is improved through grinding; 3) a sliding parallel liquid film mixed point array liquid film rolling group composite physical model about the working motion of the bearing rollers with oil storage pits and the raceways is established, an optimal physical model and an optimal mathematical model about continuous and stable lubrication of the point array rolling liquid film group about the arrangement of the oil storage pit point array are established, and the arrangement and size of the oil storage pits on the surface of the bearing rollers are optimized; and 4) special surface heat treatment is performed on the raceways of the inner ring and the outer ring of the bearing. The bearing rollers and the bearing raceways are optimized and improved, the anti-fretting damage capacity of the bearing, the limit rotating speed of the bearing and the service life of the bearing are improved.

The present application provides a magnetic bearing, a motor, a compressor and an air conditioner. The magnetic bearing comprises an axial magnetic field control unit, a radial magnetic field control unit and a rotor assembly, wherein the axial magnetic field control unit is configured to provide an axial control magnetic field to the rotor assembly, and the radial magnetic field control unit is configured to provide a radial control magnetic field to the rotor assembly. A permanent magnet (1) is arranged between the axial magnetic field control unit and the radial magnetic field control unit, and the permanent magnet (1) provides a bias magnetic field for the axial magnetic field control unit and the radial magnetic field control unit at the same time. The magnetic bearing according to the present application can effectively shorten the axial length of the rotor, simplify the rotor structure, increase the natural frequency of the shaft, and improve the rotor limit speed.

The invention discloses an elastomer structure for a high-rotating-speed flange type torque sensor rotor and a design method. The elastomer structure comprises a left flange plate, a right flange plate and a middle main body section, wherein the left flange plate and the right flange plate are integrally formed; the middle main body section is located between the two flange plates; the middle main body section is sequentially provided with a strain measuring area, an induction clamping ring mounting area and a rotating speed measuring area along the axial direction; a circle of annular groove is formed in the induction clamping ring installation area, a non-metal induction clamping ring with the inverted-T-shaped section is installed in the annular groove in a matched mode, a concave aluminum alloy pressing ring is arranged on the left side of the induction clamping ring, and the pressing ring and the elastic body are fastened through a bolt to form a concave-convex-concave embedded type fixing structure. Through the structural design of the groove, the contact area of the clamping ring and the elastic body is increased, the limit stress of the clamping ring is effectively reduced, and the clamping ring adapts to the high-rotating-speed working condition.

The invention discloses a rolling oil lubricating water-cooling bearing box device, and relates to the technical field of fans, the rolling oil lubricating water-cooling bearing box device comprises a supporting bearing box seat and a cylindrical hole self-aligning ball bearing, a supporting bearing box cover is arranged on the top of the supporting bearing box seat, a side cover is connected to one side of the supporting bearing box seat, and a first side seal is arranged on the other side of the supporting bearing box seat; a main shaft is rotationally connected to the interior of the first side seal, a second side seal is connected to the outer side of one end of the main shaft in a sleeving mode, a thrust bearing box seat is arranged on one side of the second side seal, and a thrust bearing box cover is connected to the top of the thrust bearing box seat. The cylindrical hole self-aligning ball bearing is mainly used for bearing the radial load of the main shaft and a small amount of axial load, meanwhile, the cylindrical hole self-aligning ball bearing has good self-aligning performance, the coaxiality error generated by shaft bending and shell deformation can be automatically compensated, and the radial clearance of the bearing can be finely adjusted; and mounting and dismounting are very convenient.

The high-reliability long-service-life mounted bearing comprises a base, a shell is welded to the top of the base, an outer ring and an inner ring are arranged in the middle of the shell, and balls are connected between the outer ring and the inner ring in an equal-angle rolling mode; an oil storage bin is fixed to the top of the shell. According to the high-reliability long-service-life mounted bearing, after the bearing rotates at a high speed for a long time, a large amount of heat can be generated, the heat is transmitted into the fixing box through a heat conduction rod, methyl acetate is heated into steam, pressure is generated, then a piston block can be pushed to move in the fixing box, and meanwhile a guide plate is driven by a connecting plate to move; then the through hole in the movable semi-ring coincides with the oil inlet pipeline, at the moment, lubricating oil in the oil storage bin enters the ball through the oil inlet pipeline, so that the ball is self-lubricated, frictional resistance and abrasion are greatly reduced, the service life of the ball is prolonged, and meanwhile the limit rotating speed and the bearing capacity of the bearing can be improved.

The application provides an optimization design method of an internal permanent magnet synchronous electric spindle for a high-precision numerical control machine tool, and aims at the problem that a conventional electric spindle structure cannot perform real-time adjustment on axial pre-load and radial external load, and performs optimization design on the electric spindle structure from three aspects of high-speed ceramic ball hybrid bearing material, axial pre-load real-time compensation and radial external load real-time compensation. The application can improve dynamic characteristics of a rotor system and can actively inhibit shafting vibration.

The invention relates to the technical field of fan cover machining devices, in particular to an automatic limiting fan cover top assembly tool which comprises a base, a center column is fixedly connected to the middle of the base, a steel ring limiting mechanism is connected to the peripheral side of the center column, and the steel ring limiting mechanism comprises a supporting arm, a sliding block, a spring pipe and an air pump. A plurality of supporting arms are arranged on the base, one ends of the supporting arms are fixedly connected to the peripheral side of the center column, the other ends of the supporting arms are fixedly connected to the base, and a plurality of sliding blocks are slidably connected to the supporting arms. Therefore, automatic concentric limiting and fixing of single steel rings from small diameters to large diameters can be carried out on the multiple steel rings, welding of the steel rings and steel bars is facilitated, the limiting speed of the steel rings with different diameters can be greatly increased, and then the welding speed of the fan cover is increased.

The utility model provides a kind of magnetic suspension rotating machinery, it includes: rotor, first axial bearing, second axial bearing, thrust disc and first sensor, rotor has first shaft section and second shaft section, the outer diameter of first shaft section is less than second shaft section to form first step surface at the joint of two, the iron core of second axial bearing is also formed protruding portion in the direction away from thrust disc by stretching out in the direction away from thrust disc in axial side away from thrust disc, protruding portion is located in the radial outer side of first shaft section, first sensor is set between the outer circumference of first shaft section and the radial inner circumference of protruding portion, and the axial side of first sensor is towards first step surface, to obtain the axial displacement of rotor by detecting the axial displacement of first step surface. According to the utility model, the detection accuracy of magnetic suspension rotor axial displacement can be greatly improved;Effectively solve the problem of low axial displacement detection accuracy of rotor in the magnetic suspension compressor in the prior art, leading to low axial reliability.

A bearing sealing ring and a sealing structure belong to the field of bearing sealing. The invention solves the technical problems of increased temperature rise and low limit speed of the bearing due to the tight contact position in the RS sealing form of the bearing. The sealing ring upper portion comprises an oil sealing lip, a guide face is arranged on the inner side of the top of the oil sealing lip, a pressure reducing groove is formed in the outer side of the top of the oil sealing lip, the sealing ring lower portion comprises a supporting portion, an inner side sealing lip and an outer side sealing lip, the supporting portion is arranged on the lower surface of the sealing ring lower portion, and the inner side sealing lip is arranged on the lower left side of the supporting portion. The outer side sealing lip is arranged on the lower right side of the supporting part, a first gap is formed between the lower surface of the lower portion of the sealing ring and the surface of the inner ring, sealing grooves are formed in the outer ring and the inner ring in the circumferential direction, the oil sealing lip is in interference fit with the sealing groove of the outer ring, and the inner side sealing lip is in interference fit with the sealing groove of the inner ring. A second gap is formed between the outer side sealing lip and the surface of the inner ring. The temperature rise of the bearing is reduced, the installation is more convenient, and the bearing sealing device is used for bearing sealing.

The present application provides a bearing assembly, including a first bearing, a second bearing and an adapter ring; the adapter ring includes a first ring portion, a second ring portion and an annular connecting portion arranged concentrically, the connecting portion includes a first end face and a second end face opposite to each other, the first ring portion is located on the outer peripheral side of the connecting portion and connected to the first end face, the second ring portion is located on the inner peripheral side of the connecting portion and connected to the second end face, the first bearing is sleeved on the inner periphery of the first ring portion, and the second bearing is sleeved on the outer periphery of the second ring portion; the first ring portion and the second ring portion are respectively located on both sides of the connecting portion. According to the bearing assembly of the present application, the limit speed and load-bearing capacity of the emergency bearing can be effectively improved.