43results about How to "No crawling phenomenon" patented technology

The invention relates to an anti-wrapping closed hydrostatic slideway structure of a numerical control machine. The anti-wrapping closed hydrostatic slideway structure is characterized in that the lower ends of the left side and the right side of a sliding base are respectively and fixedly provided with a movable guide rail through bolts, fixed guide rails are fixed above two inner sides of a machine body, and three end faces of the movable guide rails are respectively provided with a plurality of oil cavities; and a left oil baffle plate and a right oil baffle plate are respectively arranged below two outer sides of the sliding base and used for preventing static pressure oil from leaking to the machine body. The highest rapid transverse speed of a feeding shaft of the machine is 42m / min, an anti-wrapping rectangular sliding guide rail form is adopted, guidance is carried out by using inner sides of the two guide rails so that the deflection of moving components due to the movement can be reduced and guidance performance and guide precision of the moving components are improved; a liquid static pressure guide rail form is selected in coupling surfaces of the guide rails so as to achieve the advantages of extremely small friction resistance and high transmission efficiency; the moving precision of the guide rails are kept well, and the service life of the guide rails is long; the influence of the change of an operating speed of a working platform on the oil film thickness is smaller, the working platform works stably and has no creeping phenomenon at low speed; and an oil film has a vibration-absorbing function and good vibration performance of the guide rails. The anti-wrapping closed hydrostatic slideway structure has large bearing capacity and high supporting rigidity; and high-precision feeding movement of the machine is realized.

An ultra-low-speed and ultra-accurate-arc motor for a large-bore astronomical telescope is a large-torque alternating RE permanent-magnet synchronized servo motor. The present invention is composed of a rotor and a stator; the rotor is attached with a permanent magnet and adopts an adhesive structure; the number of pole pairs is 60 pairs and 120 poles; the stator is composed of 15 stator blocks, each block is equivalent to 46.07mm in arc length, each stator consists of 9 complete silicon steel plates and 2 silicon steel plates for reducing the edge effect; each stator adopts 9 plates / 8 poles winding mode and an armature winding is arranged according to UVWUVWUVW from right to left; the motor rotor is composed of 4 rotor blocks and has 120 magnetic steel plates in total; the magnetic steelplate adopts the torque design for reducing tooth space and is provided with a fastening device. The present invention achieves the arc movement directly driven by the large-bore astronomical telescope: low speed 1' / s; high speed 10degrees / s; speed change 30,000:1; positioning precision 0.1'; no creeping phenomenon.

A dual-redundancy telescope tracking device for an astronomical telescope comprises a pitch axis set and an azimuth axis set and is characterized in that two sets of tracking systems are respectively adopted for the pitch axis set and the azimuth axis set, and then an azimuth axis dual-redundancy axis set and a height axis dual-redundancy axis set are respectively formed; the two sets of tracking systems are automatically switched through a control system; the two sets of tracking systems in the pitch axis set jointly drive a height axis and share a set of feedback systems and a set of height limiting and braking systems; the two sets of tracking systems in the azimuth axis set jointly drive an azimuth axis and share a set of feedback systems and a set of azimuth limiting and braking systems. The dual-redundancy telescope tracking device has the advantages that bearing capacity is high, friction force is low, power consumption is small, transmission efficiency is high, and rotation accuracy is high; positioning accuracy can reach 20 degrees per second at high speed and reach 0.05'' per second at low speed, and no creeping phenomenon exists; emergency braking and mechanical shock protection can be achieved at the same time through braking and limiting, and the rotation range can be adjusted within the range from 0 degree to 360 degrees in the forward direction and in the reverse direction. The dual-redundancy telescope tracking device can be also used for other heavy high-precision rotating equipment.

The invention provides a downhole string lifting device which is characterized by comprising a control mechanism, an actuation mechanism, a hollow lead screw, a tray, a support mechanism and a short pipe. The control mechanism is fixed onto the tray, is connected with the actuation mechanism and is used for driving the actuation mechanism to circularly move; the actuation mechanism is movably connected with the tray and is screwed with the hollow lead screw, the bottom of the lead screw can be connected with a downhole string, and the actuation mechanism is used for driving the hollow lead screw to longitudinally move, so that the downhole string can be driven to longitudinally move. The downhole string lifting device has the advantages that the downhole string lifting device is simple in structure and operation, high in automation degree and safe and reliable in work, is high and environmental friendly, can carry out section milling operation on oilfield abrasive jet casings without being driven by drilling machines and further can be used for windowing and slotting operation on the casings, and energy can be saved.

The invention relates to a diamond cutter slow-feeding and fast-retracting device based on an air static pressure guide rail component and belongs to the technical field of ultra-precision processing. Up to now, no slow-feeding and fast-retracting device capable of realizing the high-precision grinding and the fast in-suit measurement of a diamond cutter exists. The air static pressure guide railcomponent and the slow-feeding and fast-retracting device are arranged on a machine tool base, a long hole of the machine tool base is communicated with a long groove, an extending rod penetrates into the long hole and is supported through a bearing support seat, the bearing support seat is fixedly connected with the long groove, one ends of a fan-shaped baffle block and a short connecting rod are respectively nested on the extending rod, a position limiting block is fixedly arranged on a bearing support seat and is provided with an inclined surface, the fan-shaped baffle block and the position limiting block are in relative arrangement in the radial direction of the extending rod, a long connecting rod is arranged in the long groove, rotating pairs are formed between a short connecting rod and the long connecting rod as well as between the long connecting rod and a guide rail connecting element, the guide rail connecting element is fixedly connected with a slide carriage of the air static pressure guide rail component, and the extending rod is fixedly connected with an operation hand wheel. The diamond cutter slow-feeding and fast-retracting device is used for the high-precision grinding and the slow-feeding and fast-retracting operation of the diamond cutter.

The invention discloses a high-precision silicon chip table and utility, which comprises the following parts: air-float support, leveling organization, plane motor and reed, wherein the square lens is set on the reed, which is supported by at least three square lens supports with bottom on the upper surface of leveling organization; the sucker is set on the upper surface of square lens to place silicon chip; the electric vortex sensor is set between air-float support and square lens; the leveling organization is composed of at least three leveling executers along circumferential direction, which correspond to square lens supports; the mirror plane is set on the square lens, which aligns mark board and reflects laser beam. The invention can assemble high-precise silicon chip within 50 nm vertical precision and 10 nm leveling precision, which improves manufacturing precision of semiconductor equipment greatly.

The invention discloses a control parameter setting method of a speed regulating controller in a speed regulating device of a torque motor; a speed regulating device on which the method is based is composed of a speed regulating order generator, a speed regulating controller, a power driving module, a speed regulating executing mechanism and a speed sensor; the setting method comprises the steps of forming a parameter identifying device of the speed regulating executing mechanism; according to a phase step output response feature of the speed regulating executing mechanism, identifying an equivalent viscous damping coefficient and an equivalent inertia of the speed regulating executing mechanism, dividing the maximal output voltage of the power driving module by the maximal value of a speed regulating order, squaring the obtained quotient, multiplying by 5 times and dividing by the equivalent inertia to obtain an integral coefficient of the speed regulating controller; multiplying the equivalent inertia by the integral coefficient of the speed regulating controller and calculating a square root, multiplying by twice, and subtracting the equivalent viscous damping coefficient from the obtained product to obtain a probability distribution function (PDF) coefficient of the speed regulating controller. According to the control parameter setting method, the controlling parameter of the speed regulating controller is precisely set, and the speed of the torque motor is stably regulated within a wide range.

The invention belongs to a friction loading device and specifically discloses a front-oscillation center spray pipe load simulating friction loading device. The device comprises a friction loading hydraulic system and a friction loading mechanism; the friction loading hydraulic system comprises an oil source, a high-pressure ball valve, a high-pressure filter, a proportional pressure reducing valve and an electromagnetic directional valve; the oil outlet of the oil source is communicated with one end of the high-pressure ball valve by use of a pipeline, the other end of the high-pressure ball valve is communicated with one end of the high-pressure filter by use of a pipeline, the other end of the high-pressure filter is communicated with one end of the proportional pressure reducing valve by use of a pipeline, and the other end of the proportional pressure reducing valve is communicated with one end of the electromagnetic directional valve by use of a pipeline; the other end of the electromagnetic directional valve is communicated with the input end of the friction loading mechanism; the friction loading mechanism comprise an outer barrel, a supporting barrel, a friction disc, a rear end cover, a bearing, a hydraulic cylinder, a fixed friction assembly, a movable friction assembly and a rotating shaft. The front-oscillation center spray pipe load simulating friction loading device is capable of simulating the friction load characteristics of a front-oscillation center spray pipe, and is high in friction torque loading accuracy and good in loading stability.

The invention relates to a pin roller bearing nut and screw rod pair. The pin roller bearing nut and screw rod pair comprises a screw rod and a nut, wherein the screw rod is externally provided with an outer thread; the pin roller bearing nut and screw rod pair further comprises a pin roller; the pin roller comprises a pin roller body; a roller head part of the pin roller body is in a cone frustum structure; a roller main body of the pin roller body is in a cylindrical structure; the nut is provided with pin roller holes; the roller main body is located in the pin roller holes to form clearance fit; the roller head part is located in a tooth groove of the screw rod to form the clearance fit; the diameter of each pin roller hole is a half of a screw pitch of the screw rod and the pin roller hole is arranged spirally; at least two circles of the pin roller holes are arranged; the pin roller holes are divided into pin roller positioning holes and pin roller adjusting holes; the pin roller positioning holes and the pin roller adjusting holes are arranged on a spiral track at intervals; the centers of the pin roller positioning holes are located on the central line of the spiral track; the centers of the pin roller adjusting holes are upwards or downwards deviated for the distance of one tolerance clearance relative to the axial direction of the central line of the spiral track. The pin roller bearing nut and screw rod pair is high in positioning precision, is great in bearing load, is safe and reliable in performance, is reasonable in structure, is convenient to mount and maintain and is wide in applicable range.