131results about How to "Precise control of displacement" patented technology

The invention relates to a lifting correction device and method for a CRTSI mould board type ballastless track on a high-speed railway roadbed. The device comprises H-type longitudinal steel beams (1), H-type short cross beams (2), high-strength bolts (3), vertical jacks (4), tetrafluoroethylene plates (5) and vertical concrete piers (6). The H-type longitudinal steel beams (1) arranged on a base plate are fixedly connected with the base plate through the high-strength bolts (3); the H-type short cross beams (2) disposed on the outer side of the upper portion of the base plate and the H-type longitudinal steel beams (1) are directly welded and fixed; each H-type short cross beam (2) extends out of the left side and the right side of the base plate (8) for a certain distance respectively; the vertical concrete piers (6), the vertical jacks (4) and the tetrafluoroethylene plates (5) are sequentially connected on the lower sides of the H-type short cross beams (2) from bottom to top; displacement is transmitted to the base plate (8) sequentially through the tetrafluoroethylene plates (5), the H-type short cross beams (2) and the H-type longitudinal steel beams (1) by means of movement of the vertical jacks (4), and therefore the base plate (8) and a track plate (7) are lifted.

The invention discloses a pneumatic hydraulic control clutch automatic operation device applied to vehicles. The invention aims at overcoming the problems in the prior art of large volume, slow response, low control precision, etc. The device is provided with an automatic control system consisting of a hydraulic control circuit, an air pressure control circuit, a displacement sensor (11) and an electric control unit (10). Two interfaces at one end of the hydraulic control circuit are respectively connected with a through-hole pipeline on the cylinder bottom and the cylinder wall of a transition hydraulic cylinder (4); the interface at the other end is connected with a through-hole pipeline on the cylinder wall of an execution hydraulic cylinder (12). The air pressure control circuit is connected with a through-hole pipeline on the cylinder wall at the left end of a pneumatic cylinder (1). A core rod of a displacement sensor (11) is fixedly connected with a piston rod at the left end of a piston (13). Corresponding wiring ends of the electric control unit (10) are respectively connected with an electromagnet wiring end of a two-position three-way proportion flux valve (6), an electromagnet wiring end of a two-position three-way pneumatic valve (8) and a wiring end wires of the displacement sensor (11).

The invention discloses a testing system for a shield tunnel excavation face stability-losing centrifugal model test under the seepage condition. An FBG sensor of the testing system guides out a signal through an optical fiber grating, an advanced optical fiber grating sensing technology is used for the shield tunnel excavation face stability-losing centrifugal model test under the seepage condition firstly, the change characteristics of supporting force of the excavation face in the shield tunnel excavation face stability-losing process can be obtained in high-precision and real-time modes, and actual shield tunnel construction is guided. The displacement and retreat rates of an excavation face plate are controlled precisely in real time in a centrifugal field through a geotechnical centrifuge manipulator, the shield tunnel excavation face stability-losing centrifugal model test at different tunnel longitudinal slope angles is achieved through the geotechnical centrifuge manipulator and an angle adjusting device, the conception is ingenious, implementing is easy, and the testing system is reasonable in scheme, simple in structure and conventional in use equipment, and has good economic benefits and social benefits.

The invention relates to a laser processing device for a crankshaft and a method for performing laser processing on the crankshaft. The laser processing device comprises the crankshaft, a three-claw clamping disk, sliding blocks, a stepping motor, a ball screw, a bearing, a support, a workbench, a guide column, a screw support, a support, a shaft coupler, a motor support, a second stepping motor, a transmission shaft, a second bearing and a laser device. The laser processing device for the crankshaft is used for performing laser processing on the crankshaft, so that the rotating axes of a main shaft neck and a connecting rod shaft neck of the crankshaft can be adjusted more precisely; meanwhile, a PLC control system is adopted to more precisely control the rotating angles of the three stepping motors and the displacements of the two sliding blocks, so that the rotating error can be reduced, and the processing precision is improved; the aim of precise laser processing of the main shaft neck and the connecting rod shaft neck of the crankshaft is fulfilled.

The invention provides a device for a support side pressure testing model during stratified unloading and nonuniform lateral displacement and a method based on the device. The device comprises a triangular diagonal bracing rack, a loading frame, a rib slot rack, a loading unit, a loading crutch, a return spring, a spliced retaining wall, a micro-soil pressure sensor, a rubber film and a model box; and the method is based on the device. The device provided by the invention can simulate the lateral pressure of a support structure in a process of stratified excavation and unloading of a foundation pit, provide a basis for engineering design and support, research a distribution law of the lateral pressure of the support structure and a law of variation with displacement during nonuniform displacement, particularly, control the lateral displacement of the retaining wall at each depth accurately, and load the passive displacement of the retaining wall with relatively small loading thrust force.

The invention discloses a multi-stage synchronous screw rod push rod mechanism. The multi-stage synchronous screw rod push rod mechanism comprises a transmission mechanism, a stretching mechanism, a fixing mechanism and a guide mechanism. A servo motor of the transmission mechanism drives a first-stage ball screw of a first-stage transmission mechanism to rotate through a motor synchronous pulleyand a ball screw synchronous pulley sequentially, the first-stage ball screw drives a first-stage ball nut and a first-stage guide mechanism to move so as to drive the other-stage hollow ball screws to rotate separately, thereby driving the ball nuts and guide mechanisms corresponding to the hollow ball screws at the same stage to move through the stretching mechanism. The multi-stage synchronousscrew rod pushing rod mechanism is small in size and capable of realizing large-stroke transmission, high-precision expansion about n times of the length of the mechanism is realized, and a pluralityof sections can be expanded and retracted simultaneously. The multi-stage ball screw push rod mechanism can achieve synchronous expansion and retraction of the multi-stage ball screws at the same speed, and has the characteristics of being high in transmission precision, small in occupied space, high in transmission efficiency, low in noise and the like.

The invention provides a hot rolling mill rolling control system used for improving rolling accuracy, and relates to a hot rolling mill control system. The hot rolling mill rolling control system used for improving rolling accuracy solves the problems that an existing hot rolling mill control system can not realize constant roll bit rolling under manual control, so that control accuracy is low. The hot rolling mill rolling control system used for improving rolling accuracy can detect the displacement of a piston inside a hydraulic cylinder through a displacement sensor, and compares detected displacement signals with roll bit control signals to obtain a displacement difference, a servo valve carries out conversion between electrical signals and flow signals on the received displacement difference, oil feeding amount of an oil tank to the hydraulic cylinder is controlled, the displacement of the piston of the hydraulic cylinder is further accurately controlled, constant roll bit rolling is finally achieved, and the rolling accuracy of a hot rolling mill is improved by 40%.

The invention discloses a rail wagon bearing seal cover removing machine and relates to bearing seal cover removing equipment. The rail wagon bearing seal cover removing machine solves the problems that due to the fact that a bearing seal cover of a rail wagon bearing is removed manually, labor intensity of operation is large, working efficiency is low and requirements of rapid development of railway operation and modernization management of railways can not be met. The rail wagon bearing seal cover removing machine comprises a transmission device, an ejection mechanism, a fixing device, a machine frame, and two cover removing mechanisms. The transmission device comprises a first motor, a first bevel gear, two second bevel gears, two first electronic rulers and two driving mechanisms. The first motor is installed on the machine frame. The two bevel gears are respectively connected with a driving mechanism. Each driving mechanism is provided with one electronic ruler. Each cover removing mechanism comprises a second electronic ruler, a second motor, a base seat, a chuck body, a disc and four clamp jaws. The ejection mechanism is arranged on the machine frame. The fixing device is installed on the machine frame. The rail wagon bearing seal cover removing machine is used for removal of rail wagon bearing seal covers.

The invention discloses a stretching mechanism for a metal mask plate stretching machine, which comprises pulling plates and stretching drivers, wherein each pulling plate is suitable for one side of a to-be-stretched metal mask plate; and the stretching drivers are used for driving the pulling plates to stretch the metal mask plate. According to the stretching mechanism provided by the embodiment of the invention, the stretching force of the metal mask plate can be controlled accurately; and according to metal mask plate stretching machine with the stretching mechanism provided by the embodiment of the invention, the stretching of each edge of the to-be-stretched metal mask plate can be controlled accurately, so as to ensure accurate pulling force, improve the accuracy of the opening position of the metal mask plate, and save labor cost.

The invention provides a hydraulic power unit system capable of automatically controlling and distributing oil quantity and a jacking and falling method of the hydraulic power unit system. The hydraulic power unit system comprises a linkage control system. The linkage control system is connected with a plurality of PLC hydraulic power units which are in one-to-one correspondence and a PLC adjusting oilway distributor through integrated data lines. The high-pressure oil pipe output ends and the data ports of the PLC hydraulic power units are respectively connected with the oil input end and the data port of the PLC adjustable oilway distributor. The PLC adjustable oilway distributor is connected with at least one digital flowmeter of a hydraulic jack through one single data line and is connected to the oil inlet of the hydraulic jack through a high-pressure oil pipe, the PLC adjustable oilway distributor reads the dynamic oil quantity information of the hydraulic jack and generates a control instruction according to a preset program so as to adjust the opening and closing of the oil supply lines in the PLC adjustable oilway distributor, and precise control of displacement of multiple jacks is achieved.

The invention discloses a novel floating caliper disc brake which comprises a brake disc and a brake caliper. The brake caliper on the right side of the brake disc is provided with a piston chamber and a shaft hole, and an electric push rod passes through the shaft hole. A smart encoder that precisely controls the stroke of the electric push rod is mounted on the electric push rod. According to the scheme, a mode of driving a piston by the electric push rod is adopted, and the problem of sealing and oil leakage of a traditional brake does not occur. At the same time, the smart encoder on the electric push rod can accurately control the displacement of a movable brake block and avoid the excessive friction between the movable brake block and the brake disc. After a long period of work, wearoccurs on the surface of the brake disc, and the smart encoder can also well control the displacement of the movable brake block to continue braking. In addition, both sides of the movable brake block and a fixed brake block are provided with damping pieces, the braking vibration and noise can be effectively reduced during braking, and thus the brake according to the scheme is simple in structureand high in reliability.

The invention relates to a stress monitoring-based fiber/polymer interfacial shear crystallization on-line detector. According to the detector, fibers are drawn in semi-crystalline polymer melt, and interfacial stress and an interfacial crystallization process are monitored on line to obtain relation among a drawing rate, interfacial shear stress, interfacial crystallization morphology and a polycrystalline state. The detector has the characteristics of high integration degree, high displacement accuracy, capability of monitoring the interfacial shear stress and the interfacial crystalline morphology in real time and the like. The drawing speed is accurate and stable to control, the interfacial shear stress is measured through a force measuring sensor, and variation in interfacial crystallization morphology is recorded through a polarizing microscope in real time; and meanwhile, data and images are acquired and processed through a computer. The interfacial shear stress introduced by drawing the fibers is compared with the corresponding crystallization morphology, and shear induced polymer crystallization is quantitatively and deeply researched.

The invention discloses a clothing radioactive contamination detection sorting instrument which comprises an upper rack, an upper detection mechanism, an upper detection mechanism crane, a display and control terminal and a displacement detection device, wherein the upper detection mechanism crane comprises a lifting motor and a bearing screw rod; the bearing screw rod comprises a driving screw rod and a plurality of driven screw rods; the driving screw rod is connected with the plurality of driven screw rods through transmission mechanisms; the lifting motor is connected with the driving screw rod through a transmission shaft; the upper detection mechanism is connected to the bearing screw rod in a liftable manner through a screw rod nut; the display and control terminal is used for controlling on/off of the lifting motor; the displacement detection device is used for measuring the displacement of the upper detection mechanism, and is connected with the display and control terminal. Through the adoption of the scheme, the lifting motor is adopted to drive the bearing screw rod to rotate so as to achieve lifting control on the upper detection mechanism; combined use of the display and control terminal and the displacement detection device can achieve accurate control on the lifting distance of the upper detection mechanism. The scheme is simple to operate and improves accuracy and efficiency of detection.

The present invention provides an air circuit breaker including an interlock apparatus. The air circuit breaker comprises a movable breaker body having a power source terminal and a load terminal and connecting or disconnecting a circuit between power source and a load, a cradle electrically and mechanically connected to or separated from the breaker body in accordance with movement of the breaker body and having a connector electrically and mechanically connected to the breaker body, a screw pipe guiding the connection to or separation from the breaker body and a power source terminal and a load terminal respectively connected to the power source and the load, a base frame fixed to the breaker body, a lead screw supported by the base frame so as to be rotatable and movable to a position for being inserted into the screw pipe and a position for being separated from the screw pipe, a interlock apparatus installed on the base frame and for indicating a position of the breaker body such as a disconnected position in which the breaker body is totally separated from the cradle, a testing position for testing the breaker body and a connected position in which the breaker body is connected to the cradle.

The invention provides a water-sand two-phase seepage testing device for broken rock. The testing device comprises a loading frame, a permeameter, a first hydraulic control system and a second hydraulic control system, wherein the first hydraulic control system comprises a double-action hydraulic cylinder, a first branched circuit and a second branched circuit, the first branched circuit comprises a first stop valve, a first reversing valve, a first quantitative plunger pump and a first motor which are connected sequentially, the second branched circuit comprises a second stop valve, a second reversing valve, a second quantitative plunger pump and a second motor which are sequentially connected, and the piston rod of the double-action hydraulic cylinder is connected with the permeameter; and the second hydraulic control system comprises a single-action hydraulic cylinder and a third stop valve, and the piston rod of the single-action hydraulic cylinder is connected with the permeameter. According to the testing device, the material of the frame is greatly saved, the rigidity of the frame is enhanced, the volume of the device is reduced, the manufacturability is improved, and the permeameter can be placed and moved easily; and the testing device has a simple structure, can be operated easily and can greatly improve the testing accuracy.

The invention discloses a vanadium-cell assembling machine, which comprises an assembly underframe, an output underframe, a translation assembly, a pushing assembly, a first driving device, and a second driving device. Slide rails are arranged on planes of the output underframe and the assembly underframe; the assembly underframe is provided with four screws; and the pushing assembly is installed on the four screws in screw connection. The first driving device comprises a first servo motor, a first speed reducer, and a plurality of sprocket wheels. The first servo motor drives the first speed reducer to run, and the first speed reducer drives the plurality of sprocket wheels to synchronously rotate through transmission chains in order to enable the screws to synchronously rotate with the sprocket wheels. The four screw rotate to drive the pushing assembly to be lifted or be pressed, instead of a conventional pneumatic manner or an oil-hydraulic manner, so that force and displacement can be precisely controlled. The displacement accuracy can reach 0.01 mm, the generated pressure can reach 100 Ton; and the pressing strength is relatively uniform, so that an entire use effect of a vanadium-cell pile is effectively improved.

The invention discloses a mobile secondary power distribution box for a construction site. A storage battery is arranged at the top of a power distribution box body by a screw and is electrically connected with a solar panel, a GPS navigator is fixed at a right side of the storage battery, a shutter controller is arranged above a front surface of the power distribution box body, a mobile controller is arranged above a right side surface of the power distribution box body, a guide rail is horizontally arranged in the power distribution box body, two ends of the guide rail are connected with a support plate, the support plate is connected with a fixed rack, a lower part of the fixed rack is connected with a horizontal installation rack, an outer side of the fixed rack is connected with a vertical installation rack, two ends of the vertical installation rack are fixed and connected by a bolt, and a heat dissipation and dust removal device is right opposite to a rear surface of the guide rail and is connected with a discharging hole through a dust collection pipeline. In the power distribution box, the power distribution box body is controlled to move by using a remote controller, a user does not need to get close to the power distribution box, and the power distribution box is high in safety, cannot bring damage to an operator, is convenient to use and can be widely applied in construction.

The invention belongs to the technical field of compressors, and particularly relates to a swinging reversing two-stage pressurization zero-clearance type ionic liquid compressor. Ionic liquid compressors use ionic liquid instead of metal pistons to generate high pressure under isothermal condition, however, an existing ionic liquid compressor uses 5-stage compression, and is complex in structure,difficult to machine and high in cost, so that the construction and development of a hydrogen refueling station are limited. The swinging reversing two-stage pressurization zero-clearance type ionicliquid compressor comprises a hydraulic mechanism and a gas pressurization mechanism which are mutually connected; the gas pressurization mechanism comprises a hydraulic swinging assembly, the hydraulic swinging assembly is connected with a first-stage gas pressurization assembly, and the hydraulic swinging assembly is connected with a second-stage gas pressurization assembly; and the hydraulic swinging assembly is connected with the hydraulic mechanism through a reversing assembly. According to the compressor, the structure is simple, machining is convenient, the control precision is high, the energy consumption is low, the clearance volume is zero, the universality is strong, hydrogen is not polluted and the cost is low.

The invention belongs to the technical field of electric main shafts, and in particular, relates to an electric beating knife cylinder. The invention aims to solve the problem of increment of the energy consumption due to necessary preparation of a hydraulic station or air pump for a traditional beating knife cylinder. For the purpose, the electric beating knife cylinder, provided by the invention, comprises a driving motor, and a transmission mechanism arranged in the driving motor; the driving motor includes a stator and a rotor; the transmission mechanism includes a lead screw, and a lead screw nut engaged with a lead screw thread; and the lead screw nut is fixedly mounted on the rotor, and can drive axial movement of the lead screw along with rotation of the rotor. The electric beating knife cylinder drives axial movement of the lead screw through synchronous rotation of the rotor and the lead screw nut, replaces traditional hydraulic and pneumatic beating knife cylinders, and realizes the purpose of saving of energy consumption.

The invention provides a drilling machine. The drilling machine is used for processing a plurality of holes in a large revolving body after being positioned at one time, and comprises a base, a rotary workbench, an upright column, a big carriage, a small carriage and a cutting device, wherein the rotary workbench is rotationally arranged on the base; the upright column, the axis of which is parallel with the rotating axis of the rotary workbench, is fixedly connected to the rotary workbench; the big carriage is movably arranged on the upright column along the axis direction of the upright column during moving; the small carriage is vertical to the axis direction of the upright column during moving and is movably arranged on the big carriage; the cutting device is arranged on the small carriage; the cutting device comprises a cutting motor and a hydraulic power head; the hydraulic power head is connected with the cutting motor through a speed-reducing device; the axis of the hydraulic power head is vertical and crossed with the rotating axis of the rotary workbench; at least three hydraulic support frames for clamping the revolving body are further arranged on the big carriage; each hydraulic support frame comprises a bracket which is fixedly connected with the big carriage; the upright plate of the bracket is parallel with the axis of the upright column; the drilling machine further comprises a hydraulic cylinder which is vertical to the upright plate and fixedly connected to the upright plate; a support head is rotationally arranged on the piston rod of the hydraulic cylinder.

The invention relates to a 3D mobile platform for a refrigerator. The 3D mobile platform for the refrigerator comprises a base and a three-dimensional mobile mechanism arranged on the base and used for mounting the refrigerator. The three-dimensional mobile mechanism comprises an X-axis mobile mechanism, and a Y-axis mobile mechanism and a Z-axis mobile mechanism which are used for achieving the purpose that the refrigerator can move in the three-dimensional direction. The refrigerator is arranged on the Z-axis mobile mechanism through a fixing device, and the fixing device is provided with a Z-directional fine adjustment device for adjusting the refrigerator in the Z direction in a fine mode. According to the 3D mobile platform for the refrigerator, the Z-directional fine adjustment device is arranged on the three-dimensional mobile mechanism, so that displacement of the refrigerator in the three-dimensional space can be controlled precisely on one hand, the Z-directional fine adjustment device can eliminate the displacement deviation in the Z direction caused by the gravity of the refrigerator on the other hand, and the three-dimensional mobile precision of the refrigerator is guaranteed.

The invention relates to a traction electromagnet capable of precisely controlling displacement quantity, which is used for solving the problem of positioning an object in traction. The technical scheme is as follows: the electromagnet and a control circuit thereof constitute a closed loop control system, wherein the control circuit consists of a signal acquisition circuit, a single-chip microcomputer and a driving circuit, the signal acquisition circuit consists of a photoelectric sensor and a comparator, a light emitting tube and a photoelectric tube of the photoelectric sensor are respectively positioned on two sides of an armature of the electromagnet, two input ends of the comparator are respectively connected with an output signal and reference voltage of the photoelectric sensor, and an output end is connected with an INTO end of the single-chip microcomputer; the input end of the driving circuit is connected with a P1.7 end of the single-chip microcomputer, the output end drives a coil of the electromagnet; and a plurality of equidistant inspection holes are formed on the armature of the electromagnet along the direction of an axial line. The device takes motion parameters as closed loop control objects, thereby leading the object in the traction to acquire precise motion velocity and further implementing the precise positioning of the object in the traction.

The invention discloses a bionic fishing device, which comprises a fishing device body. The fishing device body comprises a storage cabin, a lifting cabin and a plurality of artificial muscle based traveling limbs. The inner lower portion of the fishing device body is provided with the storage cabin; the lifting cabin is arranged in the fishing device body above the storage cabin; the traveling limbs are arranged at four corners of the fishing device body and used for realizing traveling of the fishing device body and fishing. Each traveling limb comprises a fishing passage, a plurality of sector-shaped columnar cavities and a plurality of high-pressure liquid pipes, wherein the fishing passage penetrates the axis of the corresponding traveling limb, and one end of the fishing passage is communicated with the storage cabin; the sector-shaped columnar cavities are penetratingly arranged at intervals on the traveling limb on the periphery of the fishing passage, and one end, away from the fishing device body, of each sector-shaped columnar cavity is closed; the high-pressure liquid pipes are arranged in the sector-shaped columnar cavities and in one-to-one corresponding communicationwith the sector-shaped columnar cavities and are used for controlling pressure of the sector-shaped columnar cavities. The invention further provides a control method of the bionic fishing device torealize efficient fishing.