146results about How to "Ensure dynamic balance" patented technology

The invention provides a screw rotor cooling device of a screw vacuum pump, belonging to the technical field of pumps and solving the problems that an existing screw rotor cooling device of the screw vacuum pump is poor in cooling effect and inconvenient to machine. The screw rotor cooling device comprises a hydraulic pump and a cooling liquid tank; a helical tooth is arranged on a screw rotor, a cooling liquid channel is formed in the helical tooth along the helical direction, an opening opened relative to the outside is formed in the upper surface of the cooling liquid channel, and an insert matched with the shape of the opening is fixed at the opening of the cooling liquid channel; the helical tooth is externally coated by an engineering plastic attaching layer, and the engineering plastic attaching layer covers the joint of the insert and the opening; a liquid inlet end of the cooling liquid channel is communicated with the cooling liquid tank through the hydraulic pump, and a liquid outlet end of the cooling liquid channel is communicated with the cooling liquid tank. According to the screw rotor cooling device of the screw vacuum pump, the cooling liquid channel is formed in the helical tooth of the screw rotor, so that the cooling effect of the screw rotor is relatively good.

The invention provides a rotor system on-line dynamic balancing system and a rotor system on-line dynamic balancing method. The rotor system on-line dynamic balancing system comprises a signal sensor, a signal acquirer, a data processing system, a signal transmitter, and a balance adjuster. The signal sensor is used to acquire unbalanced vibration information of a rotor system, and is used to convert the unbalanced vibration information into an analog signal, which is transmitted to the signal acquirer. The signal acquirer is used to convert the analog signal into a digital signal, and is used to transmit the digital signal into the data processing system after the denoising and the filtering process of the digital signal. The data processing system is used to calculate and process the received digital signal, and is used to acquire the unbalanced mass and the phase information of the rotor system, and is used to generate a motion signal, which is transmitted to the signal transmitter. The signal transmitter is used to transmit the motion signal to the balance adjuster. The balance adjuster is used to generate a motion in the adjuster, and is used to adjust the unbalanced mass of the rotor system, and then the on-line dynamic balancing of the rotor system is realized. The dynamic balancing of the rotor system is completed without requiring shutdown, and repeated starting and stopping steps of a conventional dynamic balancing experiment are saved, and therefore the rotor system on-line dynamic balancing system and the rotor system on-line dynamic balancing method are suitable for systems, which are not suitable for being shut down, and then economic losses caused by the shutdown are reduced.

The invention discloses an explosion-proof and anti-skid emergency wheel for a motor vehicle. The wheel consists of a tire, an explosion-proof emergency wheel, an inner wheel hub seat, explosion-proof emergency wheel retaining semicircular keys, an emergency wheel conical surface mounting steel bowl, an anti-skid spacer, a retaining nut, an outer wheel hub seat, a charging connector, an overpressure control valve, a minimum air pressure alarm and an anti-skid device, wherein the explosion-proof emergency wheel retaining semicircular keys are arranged in three semicircular key grooves of the outer wheel hub seat; the explosion-proof emergency wheel is built in an emergency wheel conical surface mounting groove on the outer wheel hub seat through the explosion-proof emergency wheel retaining semicircular keys, and the anti-loose spacer and the retaining nut are arranged; the charging connector, the overpressure control valve and the minimum air pressure alarm are arranged on the outer wheel hub seat; and the inner wheel hub seat is arranged on the outer wheel hub seat. In the wheel, when a tire burst accident is suddenly encountered, the tire is instantly substituted by the emergency wheel to run so as to avoid accidents; the anti-skid device can prevent the accidents from being produced by skidding of the tire; tire demounting equipment is not required for repairing the tire; resources and energy are saved; and pollution emission is reduced.

The invention relates to an insulation structure of a friction disc and an equipment body in a current-carrying friction wear testing machine. The friction disc is fixedly assembled at the external end of a transmission shaft; the transmission shaft is rotatablely assembled on the equipment body; a disconnecting surface is arranged on the transmission shaft of the exposed section at the internal side of the fixed assembly position with the friction disc; the disconnecting surface divides the transmission shaft into a left transmission shaft body section, a right transmission shaft body section and an end section; the left transmission shaft section and the right transmission shaft section have the same axis line and are fixed into a whole; electric insulated coating is coated on the disconnecting surface of at least one side. The insulated coating generally has thin thickness, light weight, large hardness, good rigidity and is not easy to deform when bearing the pressure; as the insulation type between the testing part and the machine body of a current-carrying testing machine, the insulation structure of the invention meets the insulation performance requirement at the high speed, improves the rotation precision and ensures the dynamic balance during the high-speed rotation process simultaneously, avoids the infidelity of the test results and correctly reflects the performance of the test objects.

The invention discloses a multi-tool path layered and adjustable milling cutter. The multi-tool path layered and adjustable milling cutter comprises a cutter rest sliding support, cutter rests and cutter bodies; a matching location hole is formed in the center of the cutter rest sliding support and cooperatively clamps a chuck of a machine tool; the cutter rest sliding support is provided with at least two adjusting grooves in the radial direction, one cutter rest is installed and fixed inside one adjusting groove, and the cutter bodies are fixedly installed on the cutter rests; the rotation radiuses of the cutter bodies installed on the cutter rests are progressively increased or reduced in the rotation direction. The milling cutter has the beneficial technical effects that Z-direction large-allowance multi-tool path continuous and layered milling can be realized on work-pieces in the surface milling process after tool setting of one time, one-step forming is realized, and the machining efficiency is improved; the diameters of tool paths can be adjusted in the X direction and the Y direction through support sliding grooves according to the sizes of blank surfaces, and the application range is wide; meanwhile, safety grooves and adjusting screws are arranged, and the phenomenon of cutter collision due to different materials and different shapes in the high-speed operation process of the machine tool can be effectively avoided.

The invention relates to a double-arm moving and taking robot simulation experiment platform and a testing method thereof. The platform comprises a tail end executing mechanism, a control system, a brain wave instrument and a myoelectricity sensor, and the tail end executing mechanism is composed of a left arm and a right arm, wherein the axis of the left arm is parallel to the axis of the right arm, the left arm and the right arm can do the plane movement in the vertical plane perpendicular to the axis, in other words, each arm has two freedom degrees in the vertical plane, and the two freedom degrees include the up-down horizontal movement and the left-right horizontal movement. The two-freedom-degree horizontal movement of the two arms in the vertical plane perpendicular to the axis isexecuted through corresponding motors. Left arm engineering skin and right arm engineering skin are attached to the left arm and the right arm correspondingly, and the front positions and the rear positions of the two arms are provided with pressure sensors used for detecting the pressure borne by the arms. The control system comprises an industrial personal computer and a PMAC. According to the method, under the situation that different human body model parameters are input, the double arms can meet the requirements of transversely-embraced human bodies for dynamic balance, the safety degree,the comfort degree and the like.

The invention provides a silage harvester automatic knife sharpening device which is characterized by comprising a reciprocating motion mechanism and a knife sharpening feeding mechanism, wherein the reciprocating motion mechanism comprises a guide rail base, two guide rails horizontally installed on the guide rail base, paired sliding blocks installed on the two guide rails respectively, a sliding block plate for fixedly connecting the paired sliding blocks to form a whole body, a lead screw, a lead screw supporting seat, a screw nut, a motor and a pawl; the knife sharpening feeding mechanism comprises a knife sharpening shell, a knife grinder, a worm wheel, a worm gear, a shaft, a feeding sleeve and a ratchet and is connected with the sliding block plate of the reciprocating motion mechanism through the knife sharpening shell; before a knife is sharpened, the knife grinder is in contact with a moving blade of a rotary knife type cutter; and during knife sharpening, the screw nut drives the knife grinder to carry out reciprocating motion under the driving of the motor, and thus a cutting edge of the moving blade on a drum is sharpened again. According to the silage harvester automatic knife sharpening device, the structure design is simple and practical, the manufacturing difficulty and the cost are lowered, operation control is liable, and the working efficiency and the operation quality are improved.

The invention discloses a ring die pelleter belonging to the field of the feed machinery. A pressing roll assembly of the ring die pelleter is wholly arranged in a ring die; the pressing roll assembly comprises three pressing roll supporting shafts, a front plate and a rear plate; the three pressing roll supporting shafts are distributed in a triangle shape; two ends of each pressing roll supporting shaft are respectively supported on the front plate and the rear plate, and each pressing roll supporting shaft is locked by pressing roll locking nuts outside the front plate; one of the three pressing roll supporting shafts is a pressing roll eccentric shaft; connecting pins are evenly distributed on the rear end surface of the rear plate; the end of a main shaft, which is the same as that of the pressing roll assembly, is provided with connecting discs; the connecting discs are provided with pin slots which are respectively matched with the connecting pins; and the connecting pins are respectively clamped in the corresponding pin slots of the connecting discs. The main shaft of the ring die pelleter only supports a rotor assembly and restricts the pressing roll assembly from rotating along with the rotor assembly, and the rotor assembly only outputs power to the ring die, thus the load of the cantilever for the main shaft, the vibration and the damage of the bearing and other components are reduced, and less power is consumed.

The invention discloses a wind driven generator end cover broken bolt dismounting device. A bearing is arranged in the center of a chassis; a rotating shaft rotates around the periphery of the chassis, and fits a bearing; a connecting end fitting a dismounting component is arranged at one end of the rotating shaft; the dismounting component comprises a drilling component for drilling a blind hole in a broken bolt, a tapping component for tapping the blind hole as a thread hole, and a screw rod component fitting the thread hole; the screw rod component comprises a screw rod; and the thread rotating direction of the screw rod is opposite to the thread rotating direction of the broken bolt. The dismounting device has the following beneficial effects: the broken bolt is drilled through the drilling component; then, the drilled hole is tapped; the screw rod component is connected with the tapped thread hole; and as the thread rotating direction of the screw rod is opposite to the thread rotating direction of the broken bolt, the broken bolt can be taken out through reversely rotating the rotating shaft, the operation is convenient and fast, the damage of a traditional thread and the dismounting of an outer end cover are not needed, the repair efficiency is greatly improved, and the repair cost is reduced.

The invention discloses a mixing dynamic balance method for crossing an outer rotor, which comprises the steps: carrying out a dynamic balance work under the condition of covering by selecting a suitable balance surface crossing the outer rotor; utilizing a mixing dynamic balance method, i.e. a least-square influence coefficient balance method and a holographic dynamic balance technology, to calculate the balance adding weight, wherein the least-square influence coefficient balance method can enable the quadratic sum of the residual oscillation values of each measuring point to be minimum, and the holographic dynamic balance technology can combine a holographic spectrum principle and a flexible rotor dynamic balance technology; and fully utilizing the structure information and the vibration information of a set to enhance the precision and the efficiency of the dynamic balance on site. The mixing dynamic balance method for crossing the outer rotor can rapidly and effectively carry out the dynamic balance on the rotor and has the advantages of high speed and high accuracy.

The invention relates to a method for machining a hot-mounted dam roller. The method for machining the hot-mounted dam roller comprises the steps of machining of a roller cylinder, machining of spindle heads and assembling of the roller cylinder and the spindle heads; assembling of the roller cylinder and the spindle heads comprises the following steps that the spindle heads and the roller cylinder are in interference fit to obtain the dam roller; unbalance amount of the dam roller is detected, center offset amount and the offset direction of the dam roller are calculated, when the unbalance amount is larger than 10 g based on a balance amount, a double-four-jaw chunk clamping device on a lathe is adopted to conduct eccentric borrowing on the dam roller, outer circle turning is conducted to remove the unbalance amount; and finish turning is conducted on a second outer circle of the roller cylinder and eighth outer circles, ninth outer circles and tenth outer circles of the spindle heads by adopting a numerical control lathe turning. The method for machining the hot-mounted dam roller has the advantage of high balance precision.

The invention relates to the technical field of aerostat accessory equipment, and discloses a foam-sandwich carbon fiber flywheel and a manufacturing method thereof. The foam-sandwich carbon fiber flywheel comprises a flywheel inner ring, a flywheel middle ring and a flywheel outer ring which are coaxially arranged at intervals from inside to outside in sequence, and further comprises a pluralityof spokes which are arranged between the flywheel inner ring and the flywheel outer ring in the radial direction of the flywheel outer ring; the spokes are evenly distributed in the circumferential direction of the flywheel outer ring; the flywheel inner ring is of a carbon fiber composite material solid structure; and the flywheel middle ring, the flywheel outer ring and the spokes are of a carbon fiber composite material hollow structure, and the inside of the carbon fiber composite material hollow structure is filled with foam core materials. The flywheel further comprises a plurality of balancing weights connected with the flywheel outer ring, and the balancing weights are evenly distributed in the circumferential direction of the flywheel outer ring. The foam-sandwich carbon fiber flywheel has excellent mechanical property and realizes the design requirement that the weight of a flywheel body structure is reduced to the greatest extent; and the design of filling of foam core effectively improves the torsional rigidity of the flywheel in the process of rotation.

The invention discloses a motor, a rotor and an installation method of the rotor. The rotor comprises an inner rotor iron core (1) and an outer rotor iron core (2), wherein a plurality of inner rotor bosses (11) distributed uniformly are arranged on the outer wall of the inner rotor iron core (1), first positioning holes (12) are formed in the inner rotor bosses (11), outer rotor bosses (21) are arranged on the inner wall of the outer rotor iron core (2) and are in one-to-one correspondence to the inner rotor bosses (11), the outer rotor bosses (21) and the inner rotor bosses (11) are staggered in an axial direction, and second positioning holes (22) are formed in the outer rotor bosses (21) and arranged corresponding to the first positioning holes. With the rotor provided by the invention, the inner rotor bosses and the outer rotor bosses are prevented from being mismatched, the rotor dynamic balance performance is ensured, and the running reliability of the rotor is ensured.

The invention belongs to the technical field of conveying devices, and particularly relates to a conveying chain capable of automatically compensating and balancing tension. The conveying chain comprises a driving station, a conveying chain, a sliding support, a telescopic guide rail, a sliding trolley, a trolley sliding rail, a counterweight tensioning assembly, a guide rail warning limit switch, a guide rail early warning limit switch and a guide rail position maintaining assembly, through the arrangement of the telescopic guide rail and the counterweight tensioning assembly, the conveying chain can automatically adjust the telescopic, tensioning and balancing of the guide rail, and the conveying efficiency of the conveying chain is prevented from being influenced by loosening of the conveying chain; a guide rail early warning limit switch and a guide rail position maintaining assembly are additionally arranged, the guide rail position maintaining assembly provides a reverse compensation force for the telescopic guide rail within a certain time when the guide rail early warning limit switch is triggered, the imbalance of the moving amount of the sliding trolley is reduced, the sliding trolley at the near end or the far end of the driving station can be prevented from triggering the limit position signal to give an alarm in advance, the whole conveying chain can not be shut down, so that the dynamic balance of tensioning stations at two positions can be guaranteed, and the tightness change of the chain can be completely counteracted.

The invention relates to a fixing device for a loop laying tube of a loop laying machine. The fixing device is characterized by comprising a loop laying head body, the loop laying tube, tube clamps and a fixing assembly, wherein the loop laying tube is arranged at the loop laying head body according to Archimedes spiral; the tube clamps are arranged on the loop laying tube and the loop laying head body; the fixing assembly is used for fixing the tube clamps and the loop laying head body and comprises fixing pins and bolts, the fixing pins are arranged in pin holes of the tube clamps and the loop laying head body, and the bolts are arranged in the fixing pins. The fixing device can prevent bump between the tube clamps of the loop laying head and a protection cover, protects the tube clamps of the loop laying head from wearing, guarantees stable dynamic balance of the loop laying head and reduces vibration of the loop laying head greatly.

The invention relates to a high-speed air floatation turbine device, mainly comprising a turbine disk, an end cap of the turbine disk, a hollow shaft, an air flotation bush, a bearing front cap and a bearing rear cap; among the components, the hollow shaft rear is provided with a shaft shoulder; the clearance of the shaft shoulder is embedded between the end cap of the turbine disk and the air floatation bush in a matching way; the front circumference of the end cap of the turbine disk is provided with an axial air floatation supporting air inlet that communicates an intake chamber of floating air to the back end surface of the shaft shoulder of the hollow shaft, and the rear circumference of the air flotation bush is provided with an axial air floatation supporting air inlet that communicates the intake chamber of floating air to the front end surface of the shaft shoulder of the hollow shaft. The device is the highly innovative high-speed air floatation turbine device, and has the advantages of compact structure, scientific and reasonable design, high reliability and long service life; and by providing radial and axial stable support for the hollow shaft by floating air, the device is effectively ensured to operate smoothly at high speed.

The invention relates to an automobile oil pipe joint machining technology, in particular to an automobile oil pipe joint machining device and a machining method thereof, and aims to solve the problems that clamping is unstable during automatic clamping of an automobile oil pipe joint, vibration noise is too large in the using process of a motor, and transmission efficiency is low. A workpiece is clamped through the clamping plates, the clamping contact area is wide, the workpiece is prevented from shaking left and right with a clamping point as a fulcrum, the stability of the workpiece in the machining process is guaranteed, the machining precision is improved, the motor is of a fixedly-installed structure, the stability of the motor is guaranteed, vibration and noise are effectively reduced, and the machining precision is improved. The transmission efficiency is improved, when the transmission gear switches the meshing state, through sliding of the transmission gear on the main driving shaft and compression of the reset spring, rapid adjustment can be achieved when the transmission gear is overlapped with the locking gear or the driving gear, smooth connection of the transmission gear is guaranteed, and switching between gear connection states is rapid and stable.

The invention provides an angular contact ball bearing in order to reduce noise generated when the angular contact ball bearing operates. The angular contact ball bearing comprises an inner ring, an outer ring and oil injection holes formed in the inner ring or the outer ring; inlets of the oil injection holes are located in the end surface of the inner ring or the outer ring; outlets of the oil injection holes are located in the concave surface, corresponding to a rolling body, of the inner ring or the outer ring; and the outlets of the oil injection holes fall behind the inlets in the rotation direction of the inner ring or the outer ring where the oil injection holes are formed. The outlets of the oil injection holes fall behind the inlets in the rotation direction of the inner ring or the outer ring, lubricating oil in the oil injection holes can be thrown towards a rolling ball of the bearing by a backward throwing force generated when the inner ring or the outer ring rotates, so that the lubricating oil automatically enters the rolling ball of the bearing to realize lubrication; and compared with the existing high-speed jet oil injection way, the angular contact ball bearing has the advantages that the speed of the lubricating oil is reduced, and no relatively high noise can be generated after airflow collision caused when the bearing rotates.

The invention discloses a high-efficiency and high-speed analysis type counter-current chromatograph. A metal unwinding frame and a dynamic balance adjusting plate are arranged on an existing chromatograph; the metal unwinding frame comprises a metal base, a metal straight pipe, a center shaft oil plug, two symmetrically-arranged metal bent pipes and two separation column oil plugs, one end of each metal bent pipe is fixedly connected with the metal base, one end of each separation column oil plug is connected with a center hole of the corresponding separation column in an expanding mode, andthe other end of each separation column oil plug is arranged in the other end of the corresponding metal bent pipe. One end of the metal straight pipe is fixedly connected with the metal base, one endof the central shaft oil plug is in expansion connection with one end of the central shaft, the other end of the central shaft oil plug is arranged in the other end of the metal straight pipe, the metal straight pipe is communicated with the two metal bent pipes, and lining hoses filled with grease are arranged in the metal straight pipe and the two metal bent pipes; and the metal base is connected with the planet carrier through a dynamic balance adjusting plate. The chromatograph can realize counter-current chromatography separation at an ultra-high rotating speed, and has the characteristics of small size and high reliability.

The invention provides a cleaning device for a high-speed rotary atomizer. The cleaning device can efficiently clean away lime slurry adhering to an atomizing disc, the maintenance time is shortened,dynamic balance of the atomizing disc can also be guaranteed, and the service life of the equipment is prolonged; the cleaning device comprises the atomizer, the atomizer comprises a lime slurry channel and the atomizing disc which are communicated with each other, the atomizer further comprises a cylinder and a circulating pump arranged outside the cylinder, the interior of the cylinder is divided into a soaking area and a storing area by a clapboard, a sewage draining opening is formed in the position, at the bottom of each area, of the cylinder, the atomizer is installed on the cylinder, the atomizing disc is arranged in the soaking area, the storing area is communicated with the lime slurry channel after being connected with the circulating pump, the clapboard is provided with a waterpassing hole which is higher than the atomizing disc, and cleaning liquid is added into the storing area.