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

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 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 arrangedbelow 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.

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.

A direct driving device of a self-bearing motor is provided with a central rotation body, a magnetic suspension bearing and a direct driving motor, wherein the central rotation body is in rotation symmetry, the magnetic suspension bearing is used for restraining the rotation body to do axial and radial movement, the direct driving motor drives the central rotation body, the central rotation body in rotation symmetry forms a rotation workbench, a load is arranged on the rotation workbench, the magnetic suspension bearing for restraining the rotation body to do axial and radial movement comprises an upper axial permanent-magnet bias magnetic suspension bearing, a lower axial permanent-magnet bias magnetic suspension bearing, four axial bias magnetic suspension bearing or bearing units and four axial active magnetic suspension or bearing units, each bearing or bearing unit forms the magnetic suspension bearing system of the device, and moreover, an axial / radial rolling bearing is arrangedand used as a protection bearing. The direct driving device is easy to process and assemble and has the advantages of no friction, low power consumption, high transmission efficiency, high rotation positioning accuracy, and no climbing phenomenon during rotation at an ultralow speed.

The invention relates to a bidirectional speed regulation hydraulic control system of an oil return cavity based on a hydraulic cylinder negative load. The system is characterized by comprising a fueltank, a power pump, an oil source pressure setting valve set and a bidirectional speed regulation hydraulic control loop. According to the system, a speed regulation valve is used, so that the more energy-saving effect is achieved; balance of the negative load can be realized by the speed regulation valve and a balance valve, but if the balance valve is opened, at least hydraulic pressure of 2MPaneeds to be increased in a negative load cavity, and the balance valve is only used for supplementing oil to the negative cavity; and the number of valves for a loop is reduced, for the same system,if the balance valve is used, control on the speed can only be realized by adding the speed regulation valve in an oil inlet cavity, namely, the balance valve can only limit the force but not limit the speed, but the speed regulation valve has the functions of speed limiting and force limiting, only one bridge type bidirectional bottom plate is used, the structure of the system is simple, and thefailure rate is low.

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.

The invention belongs to the field of mechanical equipment, and particularly relates to a ceramic fiber cutting device. The ceramic fiber cutting device is composed of a horizontal rotation mechanism (1), a vertical lifting mechanism (2), a radial adjustment mechanism (3) and a swing mechanism (4); and the radial adjustment mechanism (3) is installed on one side of the horizontal rotation mechanism (1), the vertical lifting mechanism (2) is vertically installed on the radial adjustment mechanism (3) in a penetrating manner, and the lower end of the vertical lifting mechanism (2) is connected with the swing mechanism (4). The structure manner that a circular orbit rotary bridge is combined with a cantilever is adopted in the ceramic fiber cutting device so that the span of a cutting machine can be effectively reduced through the structure, the overall size can be decreased, and meanwhile the cutting accuracy can be guaranteed. The overall weight of the rotation mechanism, a radial feeding mechanism, a cantilever support structure and the swing mechanism is supported by outer rings of four rolling bearings, when the rotary bridge rotates, the outer rings of the bearings move on the end plane of a large gear ring, the friction coefficient is small, dynamic coefficients are approximate to static friction coefficients, the crawl phenomenon is avoided, motion is light and flexible, and the positioning accuracy is high.

An ultralow-speed unitary spliced-disc maglev torque motor comprises a base and a pair of unitary spliced-disc direct-drive motors and is characterized in that a center rotator in rotational symmetryand a pair of conical active biased maglev bearings that restrain axial and radial motion of the center rotator are provided, and maglev supporting is provided for a rotary shaft; a pair of radial protection bearings, a pair of axial protection bearings and a position feedback system are also provided correspondingly; on this basis, the unitary spliced-disc direct-drive motors drive the center rotator in redundant or synchronous manner. The direct-drive motor, the maglev bearings, the axial and radial protection bearings and a feedback and braking system are integrated, the structure is simpleand compact, the integrity is high, space utilization is increased, machining cost and power electronic component cost can be effectively reduced, and product competitiveness is greatly improved.

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 wide range speed regulation device for a torque motor. The device consists of a speed regulation command generator, a speed regulation controller, a power drive module, a speed regulation actuator and a speed sensor; the speed regulation controller consists of a comparator, an integrator, an integral coefficient multiplier, a subtracter, a PDF (Portable Document Format) coefficient multiplier, a PDF (Portable Document Format) follower, a feedback follower and an integral saturation limiter; the speed regulation actuator consists of the torque motor, a coupling and a mechanical load, wherein the comparator, the integrator, the integral coefficient multiplier, the subtracter, the power drive module, the torque motor, the coupling, the mechanical load, the speed sensor and the feedback follower are annularly connected in a clockwise direction; the comparator is also connected with the speed regulation command generator; the subtracter is also connected with the speed regulation sensor by the PDF coefficient multiplier and the PDF follower; and the integral saturation limiter is respectively connected with the output of the integral coefficient multiplier and the integrator. The wide range speed regulation device provided by the invention has the advantages of wide speed regulation range from zero to thousands of turns and excellent speed regulation performance.

The invention discloses a fixed-point fractional cutting method for a fixed-length guide strip. The method comprises the following steps: installing a guide strip cutting device; installing the guide strip in classification and establishing a guide strip length standard; confirming the width of a guide strip positioning slot according to the classification of the guide strip and the guide strip length standard; confirming the initial cutting point of the guiding strip by performing the heating and temperature-control treatment on the guide strip or directly connecting a fixing device of the guide strip cutting device; adjusting a cutting tool on the guide strip cutting device according to the classification of the guide strip; fixing the guide strip in the positioning slot; fixing a cutting position by bilaterally fixing points according to the standard length; connecting the guide strip cutting device; transmitting after cutting the guide strip by referring to the fixed point position; and till the guide strip is fixed at the fixed point position again according to the length standard, starting the next cutting process. The invention also provides a cutting device for realizing the method.

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.

The invention discloses a short-distance measuring device for paperboard strength detection. The device comprises a first installation plate, a sample paper cutting mechanism, a strength detection mechanism and a discharging mechanism, the sample paper cutting mechanism and the strength detection mechanism are fixed to the two sides of the upper end of the first installation plate, the dischargingmechanism is arranged on the strength detection mechanism, a displayer is arranged on the strength detection mechanism, and a thermal printer is arranged on one side of the displayer. The paperboardslitting machine realizes automatic slitting of paperboards, automatically crushes paper slips, automatically detects pressure values, records and analyzes the pressure values, automatically discharges the detected paper slips, and is high in automation degree, high in working efficiency and high in detection precision.