347results about How to "Working principle is clear" patented technology

The invention discloses intelligent management system and method of an electric power grounding wire based on an RFID (Radio Frequency Identification Device). The intelligent management system of the electric power grounding wire comprises an RFID electronic label installed on a grounding wire, an RFID electronic label installed on an electric power tower, a hand-held PDA (Personal Digital Assistant) and a warehouse server, wherein the RFID electronic label installed on the grounding wire is used for storing the parameter information of the grounding wire; the RFID electronic label installed on the electric power tower is used for storing the parameter information of the tower; and the RFID electronic label on the grounding wire is respectively in radio-frequency wireless connection with the hand-held PDA and the warehouse server, the RFID electronic label on the tower is in radio-frequency wireless connection with the hand-held PDA, and the hand-held PDA is communicated with the warehouse server through a communication network. The grounding wire closed-loop management system based on the RFID can be used for effectively improving the warehousing management level of the groundingwire, reducing equipment loss, preventing the misoperation of hanging / removing operation of the grounding wire and improving the running efficiency of an electric power system and the safety levels of workers.

The invention discloses a variable-rigidity and variable-damping tuned mass damper, which is mainly applied to vibration control over multi-frequency structures such as high-rise buildings or long-span bridges, ocean platforms and the like. The tuned mass damper comprises a mass block, wherein a vertical spring is connected to the upside of the mass block in a vertical direction, and magnetorheological dampers are respectively arranged on the mass block in a horizontal direction and a vertical direction; and a cantilever spring is arranged horizontally and longitudinally, one end of the cantilever spring is connected with the mass block, the other end of the cantilever is connected with a traveling mechanism. Two ends of the traveling mechanism are placed on a rigid guide rail, and the traveling is driven by a stepping motor to move longitudinally. The length of the cantilever spring is regulated by the movement of the stepping motor, so that the tuning frequency of the tuned mass damper is further regulated; and by regulating currents of the magnetorheological dampers to change the damping ratio of the tuned mass damper, the rigidity and the damping are regulatable continuously, so that the vibration control in the vertical direction and the horizontal direction. The variable-rigidity and variable-damping tuned mass damper disclosed by the invention has a clear working principle and has the advantages of easiness for realizing semi-active control property, good damping effect, fast response, high precision and the like in engineering application.

The invention relates to an adhesive toe for a gecko robot and a movement method thereof and belongs to the field of technical application of biomorphic robots. The toe comprises a flexible material toe base (c) and a sticky material layer (a) which is embedded into the flexible material toe base (c), wherein the height of the lower bottom surface of the sticky material layer (a) is equal to that of the flexible material toe base (c); and a spring layer (b) is also formed on the flexible material toe base (c). The toe has three specific structures, namely flat-shaped, semi-arc and arched stereo structures with bending of 180 degrees. According to the characteristic of a special cantilever type structure, the driven mode is adopted, so that the characteristics that the toe has the larger adhesion in one direction and the smaller desorption force in the negative direction are provided, and the mechanical anisotropy characteristics that a gecko has the larger adhesion in the one direction and the smaller desorption force in the negative direction can be simulated fully and are applied to the gecko robot.

An oil-saving boosting unit able to recover the braked kinetic energy for car features that the additional mechanical structure and simple hydraulic system are additionally installed to the output axle of speed variator or drive axle. When the car is braking, its inertia can drive oil pump to become the pressure energy of fluid and store it in energy accumulator. When the car is driven or accelerated, the energy is released via the same mechanism. An enclosed leather bag type oil tank and a simple hydraulic system are used.

The invention discloses a damping device and a using method of the damping device, in particular relates to a friction-metallic yielding energy consumption combined control damping device applied to a shear wall connecting beam and a using and installation method of the damping device, belonging to the technical field of structural vibration control in civil engineering. The invention relates to a control method for combining a metallic yielding damper and a metal friction damper to improve an energy consumption vibration-damping performance of a damper, and the damping device mainly consists of a metal friction energy consumption area, a soft steel yielding energy consumption area and a built-in area connected with a shear wall. The purpose of energy consumption in a staging manner is achieved by soft steel yielding energy consumption and steel plate friction energy consumption, and the magnitude of pretightening force that the friction damper is connected with a bolt is adjusted to enable the combined control damper to have an adjusting function. The device and the method in the invention can be applied to a high-rise coupled shear wall structure to attach or replace the connecting beam, so as to improve the energy consumption performance and improve the structural seismic-resisting effect. The friction-metallic yielding energy consumption combined control damping device is convenient to manufacture, and has accurate working principle and good application prospect.

The invention discloses a fiber optic monitoring method for the straightness of a scraper conveyor in fully mechanized mining face. The method includes the following steps: (1) laying cylindrical flexible long rod on the body of the scraper conveyor; (2) arranging the horizontal sensing optical fiber and the vertical sensing optical fiber along the long side of the longitudinal section of the cylindrical flexible long rod parallel to the horizontal and vertical planes; (3) connecting the horizontal sensing optical fiber and the vertical sensing optical fiber to the mining signal demodulator and then to the mining industrial personal computer; (4) calculating the straightness of the scraper conveyor according to the mapping relationship between the straightness of the horizontal sensing optical fiber and the vertical sensing optical fiber and the straightness of the scraper conveyor. The method disclosed by the invention realizes direct, convenient, accurate and on-line real-time monitoring of the straightness of the scraper conveyor, and has the advantages of high anti-interference ability, intrinsic explosion-proof insulation, simple structure, reasonable cost and clear principle.

The invention relates to a parallel-connection three-dimensional force sensor with a decoupling structure, belonging to the technical field of sensors. The sensor consists of a fixed base 1, a force measurement platform 2 and three branches which connect the fixed base and the force measurement platform, wherein the fixed base 1 is fixedly connected with three force-sensitive inductive elements 6, 10 and 14 and connected with each branch through a revolving pair, the force measurement platform is connected with each branch through the revolving pair, each branch is formed by connecting the three revolving pairs in series, three revolving pair axes forming the same branch are parallel with each other, the revolving pair axes among different branches are perpendicular to each other in space, and the force signal detected by the force-sensitive inductive element of each branch has the same direction with the revolving pair axes of the branch. The sensor can sense special three-dimensional information, has symmetrical structure, simple manufacture and dimensional decoupling, is formed by assembling separative elements, is convenient for realizing seriation, and can be applied to various fields, such as robots, aerospace, athletic sports, and the like needing for three-dimensional force measurement.

The invention relates to a device for testing hydrothermal variation features of a hydrous porous medium in a freeze thawing process. The device is characterized in that a double-layer system of internal and external model boxes is adopted, a test sample and a variety of sensors are arranged in the internal model box, the external model box mainly plays a heat preservation and thermal insulation role, refrigerating coils arranged on the inner side wall and at the bottom of the external model box are communicated with two external cold baths to control the temperature and integrally heat and cool, and such liquid with low freezing points as alcohol, kerosene and ethanediol can be placed in the interlayer space of the internal and external model boxes to improve the temperature control precision and the constant temperature effect. The device provided by the invention is mainly used for testing the hydrothermal variation feature parameters of the hydrous porous medium in the freeze thawing process, comprising temperature, volume unfrozen water content, matric suction and the like, so that a water feature curve of the hydrous porous medium in the freeze thawing process is drawn. The device provided by the invention has the advantages of simplicity in operation, stable work, high temperature control precision, high overall heating and cooling speed and the like, data are automatically collected by a data collector, and then the hydrothermal variation feature parameters of the hydrous porous medium in the freeze thawing process are effectively tested and the water feature curve is accurately obtained.

The invention discloses a grinder with the cooling function and belongs to the technical field of machining equipment. The grinder comprises a grinding machine which is composed of a grinding disc and a grinding machine housing, wherein a water storage tank body is arranged below the grinding machine; fixing blocks are arranged at the front end of the water storage tank body; a guide rod is arranged between each fixing block and the back end of the water storage tank body; a handheld handle is arranged on each guide rod; workpiece clamps and a water outlet nozzle are arranged on the corresponding handheld handles; the water outlet nozzle is formed behind one workpiece clamp; a water outlet is formed in the bottom end of one side of the water storage tank body; a water suction pump body is fixedly arranged above the water outlet on the same side; one end of the water suction pump body is connected with the water outlet; and the other end of the water suction pump body is connected with the water outlet nozzle. According to the grinder, the structure is simple, and the working principle is clear; with arrangement of a movable type clamp on the traditional grinder, the grinder has all the functions of the traditional grinder, the movable type clamp can also operated by replacing the traditional handheld type workpiece; and the design of a water outlet structure also ensures the cutter grinding process not to be influenced by burning hot of the workpiece, so that the metal mechanical properties of a ground part and the processing production efficiency are both improved.

A superimposed and extractable adjustable sieve plate belongs to the field of sieve plate equipment, and is composed of an upper plate, a middle plate and a bottom plate. There are uniformly distributed large sieve holes, middle sieve holes are set on the middle plate, and small sieve holes are set on the bottom plate. It is in a concentric state with the small sieve holes. Its structure is simple and reasonable, and its working principle is clear. It is composed of three layers of sieve plates that can move each other. Each layer is equipped with a sieve hole with different specifications. Arrangement, the sieve plate can be adjusted according to the screening object during the screening operation. When the sieve plate is synthesized and used, the wear of the sieve plate can be further reduced. It has high wear resistance, strength and strong impact resistance, and improves the The working efficiency of the sieve plate greatly prolongs the service life of the sieve plate.

The present invention discloses a magneto-rheological dampers-tuned liquid column, which includes a horizontal tube at the bottom of the U-shaped tube,its character is: In the horizontal segment of he U-tube installed a magneto-rheological fluid damper, the ends of core rod are located in the corresponding external the Magneto-rheological fluid damper, between the end of the steel tube of the magneto-rheologica fluid damper and core rob installed a sealed structure. Two ends of the core rob are fixed pistons which can move in axial direction attending the core rob and keep apart from the two sides of the piston sealed in the horizontal tube. It adapts to the magneto-rheological fliud damper to control damper force, so that the characteristics of the invention is energy small, simple structure, low cost, easy to control adm high efficiency.

The invention provides a tablet personal computer or mobile phone support for a backseat of a private car and belongs to the technical field of vehicle-mounted auxiliary equipment. A mobile phone support body is formed by connecting a left socket, a right socket, closed rings, a support board, a left movable rod, a right movable rod, screwing nuts, sliding blocks and a sliding groove. The sliding groove is transversely formed in the middle portion of the support board. The left movable rod and the right movable rod are connected into the sliding groove in a sliding manner through the sliding blocks. The left socket and the right socket are formed in the upper end of the support board. The closed rings are movably arranged at the tail portions of the left socket and the right socket through pin shafts. The support body is fixedly connected with a headrest support through the left socket and the right socket. The tablet personal computer or mobile phone support is simple in structure, clear in work principle and extremely convenient to use; and the support is structurally connected with a car headrest support through the sockets, and the movable rods which can slide and be fixed are arranged on the support board, so that mobile phones or tablet personal computers of various specifications can be placed, the support is easy and convenient to detach and install, the inner structure of the car does not need to be changed, the two hands of a passenger are released, the comfort level is improved, and the use requirement of the passenger on the back row of the car is met.

The invention discloses a manufacturing method for a safe lithium ion power battery positive plate. The manufacturing method comprises the steps of performing ball milling and mixing on a positive electrode active substance and a conductive agent based on mass percent to obtain a positive electrode powder mixture A; adding the positive electrode powder mixture A into solvent based on a certain proportion, and stirring to obtain a solvent sizing material B; adding the positive electrode powder mixture A into the sizing material B in multiple times, controlling the mass ratio of the solid body quantity of the positive electrode powder mixture A to the solvent, stirring and preparing positive electrode slurry, adjusting and controlling the viscosity of the slurry, and stirring to obtain positive electrode slurry; taking an aluminum foil as a current collector, coating the current collector with the positive electrode slurry in a single-surface coating manner; reserving ML current collector, drying, controlling the surface density, rolling, controlling compaction density and the pole piece thickness; and performing operations of striping, slitting, tab spot welding, and T-shaped tab rubber tape gluing to obtain the safe lithium ion power battery positive plate. The lithium ion battery assembled by the manufactured safe lithium ion power battery positive plate is good in electrical performance and extremely high in safety performance.

The invention discloses a mobile sensing type hydrostatic leveling system and a method for monitoring vertical displacement deformation. In order to improve the reliability and universality of the sensing type hydrostatic leveling system and reduce the cost, the leveling system comprises a reference hydrostatic leveling barrel for containing liquid on a stationary point, multiple measuring point hydrostatic leveling barrels for containing liquid and arranged on deformation points, and a distance measurement device used for measuring the distance between the liquid level in the hydrostatic leveling barrel and the top end of the hydrostatic leveling barrel; the lower parts of adjacent two hydrostatic leveling barrels are connected in series through a corresponding communicating pipe. The system is simple in structure, stable in precision, simple and convenient in range adjustment, semi-automatic in sensing, automatic in recording, low in construction cost and good in effect, and the operating cost is reduced.

The invention discloses a light source and a setting method thereof, and an optical detection method and system. The method comprises the following steps: acquiring image gray level distribution characteristic data of a standard sample in a camera view field range; adjusting the light-emitting intensity distribution of a light source according to the image gray level distribution characteristic data, wherein the light source is an area array light-emitting device, and the area array light-emitting device comprises a light-emitting unit with controllable light-emitting intensity; and using an adjusted light source to illuminate a detected product, adjusting the luminous intensity distribution of an area array illumination light source, feeding back the compensated brightness distribution to the light source, and carrying out illumination for compensating the brightness distribution. Image saturation of a high-reflection area is avoided, and meanwhile the image brightness of a low-reflection area is improved. Therefore, the detection precision of the detected object irradiated by the light source is improved.

The invention discloses a laminar shear model box capable of simulating a viscoelastic boundary, and belongs to the field of vibration testing of civil engineering structures. A box body of the laminar shear model box is formed by overlapping N layers of square steel tube frames at equal intervals; each layer of the square steel frame is formed by mutually welding four square steel pipes; in every two adjacent layers of the square steel frames, three stainless steel base plates are welded between the lower surface of the upper square steel frame and the upper surface of the lower square steel frame at equal intervals; three independent V-shaped grooves perpendicular to one another in direction are milled in each stainless steel base plate; the V-shaped angle of each groove bottom is 90 degrees; a plurality of steel balls are placed in each groove so as to form freely-sliding supporting points; and the two sides in the longitudinal direction of the box body are each provided with two round steel stand columns and steel cross beams. According to the laminar shear model box capable of simulating the viscoelastic boundary, the rigidity and the damping coefficient of the box body can be adjusted according to the soil properties of different soil bodies, and seismic responses under different soil layers or layered soil site conditions can be simulated well.

The invention discloses a displacement rotation amplifying type shape memory alloy damper which comprises superelastic shape memory alloy wires, a ball screw threaded rod, a ball screw nut, a guide supporting seat, a fixed retaining block, a ball bearing, clamps, a fixing plate, a sleeve, a left end cap, a right end cap, connecting bolts and fastening bolts. The ball screw threaded rod serves as a push-pull rod to be supported through the guide supporting seat and only be in push-pull motion axially, the ball screw nut is supported and limited by the ball bearing and can only be in rotating motion, and the superelastic shape memory alloy wires penetrate space between a through hole of the ball screw nut and a through hole of the fixing plate and are clamped and fixed through the clamps. A ball screw is utilized to convert axial linear motion into rotating motion so as to amplify displacement stroke of the shape memory alloy wire, energy-consuming effect is improved remarkably, and the displacement rotation amplifying type shape memory alloy damper has the advantages of self-resetting, simple structure, safety, reliability, convenience for actual application and the like and can be applied to seismic resistance and vibration reduction of structures like high-rise buildings and large-span bridges.

The invention discloses a monitoring method for firefighting space integration of a firefighting robot, and belongs to the technical field of monitoring. The monitoring method comprises the following steps of: obtaining a geographic position and a geographic environment of firefighting through reconnaissance of an unmanned aerial vehicle, so as to obtain an initial scene; on the initial scene, obtaining a building structure and an indoor structure by the firefighting robot; obtaining operation positions of firefighters, and determining the position of a control center, so as to obtain a final scene; and carrying out monitoring according to the scenes. According to the monitoring method, the geographic position of the firefighting field is acquired and obtained through the control center, marks are made on a map, and the unmanned aerial vehicle carries out reconnaissance around the field according to the map and the marks on the map so as to obtain the field environment. Field information is transferred to the control center, the control center distributes and schedules firefighting robots to carry out firefighting rescue through final settlement, and firefighters are dispatched when necessary. According to the monitoring method, the whole-process real-time monitoring of the firefighting field is realized, the firefighting efficiency is greatly improved, and the life safety of the firefighters and the people are ensured.

The invention relates to a tunnel geological advance forecasting method based on mechanical energy nondestructive detection. The method is characterized in that seismic wave receiving points are distributed on a tunnel face and within range of two-meter-deep non-excavated surrounding rocks around the tunnel face, seismic wave excitation points are distributed on the tunnel axis of certain distance within an excavated range behind the tunnel face and the surrounding range or on a bottom plate parallel to the tunnel axis in turn, and a gasket plate is distributed on the position of each excitation point; and after drilling at the seismic wave receiving points, detectors are distributed in the hole bottoms, and the detectors are connected with a seismic wave acquisition instrument via signal transmission lines so that stable, controllable and safe mechanism energy is utilized to excite seismic wave under the premise of no damage to tunnel lining, seismic reflection wave is enabled to reach receiving holes in "first time" by reasonable distribution of the positions of the excitation points and receiving points and thus tunnel geological advance forecasting can be realized.

The invention provides a dry-wet combined dual-cooling multi-condition cross-flow closed cooling tower and a regulating method for the running mode of the cooling tower, and belongs to the technical field of cooling by circulating water. The cooling tower comprises a tower body, draught fans, water absorbers, a finned tube bundle heat exchanger, a plain tube bundle heat exchanger, a water spraying system, air inlets, a filler, a water collecting tank, a make-up floating ball valve and a drain valve, wherein the inner cavity of the tower body is divided by the water absorbers into two parts: a left cavity and a right cavity; the draught fans are mounted at the top of the left cavity; a first spraying row tube, the finned tube bundle heat exchanger, a second spraying row tube, a plain tube bundle heat exchanger, the filler and the water collecting tank are arranged in the right cavity from top to bottom; and the first air inlet, the second air inlet and the third air inlet are formed in the right wall of the right cavity from top to bottom. The cooling tower provided by the invention has the advantage that the dry-wet combined dual-cooling multi-condition flexible conversion can be achieved by regulating the number of the draught fans which need to start up, the air inlets, the water amount and the water spraying tow tubes according to changes in the outdoor environment and those in the heat dissipating capacity of cooling water, thereby fulfilling the energy-saving, water-saving and efficient cooling purposes.

The invention relates to a sectional and continuous seeding integrated depth-adjustable multifunctional seeder, and belongs to the technical field of seeding apparatus manufacturing. The seeder comprises a sectional seeding device, a continuous seeding device, a transfer mechanism, a seed throwing head mechanism, a seeding depth adjusting device, a travel switch and a control device; the sectional seeding device, the continuous seeding device and the transfer mechanism are arranged above a working platform in a parallel manner, the seed throwing head mechanism is arranged under the working platform, a seed supplementing seat is arranged behind the working platform, the travel switch is arranged at one side of the frame of the seeder, the seeding depth adjusting device is arranged at the bottom of the frame of the seeder, the control device is arranged in the middle portion of the frame of the seeder, and the control device, a fifth wheel instrument, the travel switch, the sectional seeding device and the continuous seeding device form feedback connection. The seeder has the advantages of uniform seed distribution, accurate seed falling, rand setting of the length of a small zone, realization of sectional and continuous seeding integration, and enlargement of the application range of seeders.

As an object to be tested, a magnetic steel-block (MS) is put on the Boolean resonance instrument. The magnetic field (MF) produced by the vibrating MS becomes a variable one against the closely fixed Hall cell (HC). The voltage induced by HC in the variable MF reflects the moving state of MS. Finally, the induced voltage is amplified, analyzed and processed. This method uses a HC and the existing lab equipment to non-contacted collect the amplitude info of a regularly or irregularly moving object around an axis to analyzes its moving state. This is a university teaching experiment method. It is easy to operate and easy to realize. The cost of equipment and material is low. It is convenient to collect and analyze data under the state of chaos movement, including torsional pendulum and other special movement. This benefits to teaching and research on chaos theory and experiment and raises learning interest and induces creative thinking.

The invention discloses a disease early warning system based on excrement ecological evaluation, a health monitoring ring (or a box body) and a closestool. The system comprises a closestool terminal ecological detection and analysis subsystem and a cloud disease evaluation subsystem. The closestool terminal ecological detection and analysis subsystem comprises a vision module, a spectrum module, agas module, a wireless data transmission module and a display module; the vision module comprises a camera for shooting excreta in a closestool and an image processor for receiving and processing data of the camera; the spectrum module comprises a spectrum emitter used for emitting detection light to excreta and a spectrum receiver used for receiving reflected light of the excreta and analyzing the reflected light. The cloud disease evaluation subsystem is used for receiving processing results of the image processor and the spectrum receiver, comparing and analyzing the processing results with a pre-stored disease information database to obtain a disease evaluation result and sending the disease evaluation result to the display module for display. According to the invention, consumables are not needed, a non-contact detection method is adopted, and various data indexes are combined for comparison, so that the reliability of a comparison result is higher, and the disease evaluation response speed is increased.

The invention provides a swimsuit vending machine and an operating method thereof, and belongs to the technical field of retail auxiliary equipment. The swimsuit vending machine is novel in structure, compact and reasonable in layout, and clear in working principle, and structurally consists of a vending machine casing, and a horizontal movement mechanism, a vertical movement mechanism, a code-scanning ejection mechanism, a storage mechanism and an electric control module arranged in the vending machine casing. The swimsuit vending machine can complete code-scanning recording and ejection selling operations, the actions of code scanning and ejection are fast, and the ejection position is accurate, so that vending actions of swimsuit products are effectively assisted, and the vending efficiency is improved.

A new check valve spool structure belongs to the technical field of valves and is composed of a valve stem, a valve plate, a sealing gasket, a pressure plate and a nut. The valve stem is a stepped shaft, and the shaft head of the stepped shaft is processed with external threads. Placed on the shoulder of the stepped shaft, the gasket is placed under the valve plate, the pressure plate is placed under the gasket, the nut is tightened under the pressure plate, and a pin hole through the valve stem is opened on the tightened nut. A latch is arranged in the pin hole. The invention has simple structure and clear working principle. Compared with the traditional valve core structure, it avoids the welding connection between the valve stem and the valve plate, and the fracture of the root of the valve stem is caused by the stress concentration; the setting of the gasket can play a buffering and sealing effect , prolonging the service life of the sealing surface; the use of cylindrical pins can avoid the entanglement of fibrous substances and affect the matching of the sealing surface, further improving the sealing performance.

The invention discloses an automatic glue preparation device, and belongs to the technical field of textile equipment. The automatic glue preparation device comprises a glue preparation box body and seat feet arranged at the bottom of the glue preparation box body; the bottom of the glue preparation box body is provided with a stirring motor, and stirring blades are arranged above the stirring motor; feeding assemblies are arranged in the front direction, the rear direction, the left direction and the right direction of the exterior of the glue preparation box body and each comprise a feedingcylinder, a pushing piston, a feed pipe, a discharge pipe and one-way valves; one end of each feed pipe is connected with a raw material end, and the other end of each feed pipe is connected with thebottom end of the feed cylinder; one end of each discharge pipe is connected at the bottom of the feed cylinder, and the other end of each discharge pipe communicates with the glue preparation box body; each pushing piston is arranged in the feed cylinder; each feed pipe is provided with a feed one-way valve; each discharge pipe is provided with a discharge on-way valve. The automatic glue preparation device has the advantages of novel structure and clear working principle; compared with a traditional glue preparation device, the automatic glue preparation device can be used for preparing a large amount of glue solution, has the advantages of full and uniform stirring, and time-saving and labor-saving operation, can quickly prepare a dipping glue solution, has high preparation efficiency,and improves the processing efficiency.

A graphite copper sleeve piston rod upper assembly that can replace the guide belt belongs to the technical field of hydraulic equipment. The end of the hydraulic cylinder body is provided with an internal seal, a graphite copper sleeve assembly and an external seal in sequence from the inside to the outside. The sleeve assembly is set inside the inner seal, the outer seal is close to the inner seal and the graphite copper sleeve assembly and is tightly connected with the hydraulic cylinder body, and the outer seal, graphite copper sleeve assembly and inner seal are all sleeved on the piston rod and form a sliding fit connection with the piston rod. The structure of the invention is simple and the working principle is clear. The combination of graphite copper sleeve and inner and outer seals is used to replace the traditional resin copper powder guide belt. The graphite plays a self-lubricating role, and the copper sleeve plays a The anti-friction effect reduces the movement resistance of the piston rod, makes the movement of the piston rod more smooth, reduces the eccentric wear of the piston rod, and prolongs the working life of the sealing ring; at the same time, the copper sleeve also increases the radial bearing capacity. Improve the working efficiency of the equipment.

The invention discloses a movable lifting type plastic garbage crushing device, and belongs to the technical field of garbage recycling equipment. The device comprises fixed supporting legs and a machine cover, wherein a sleeve is arranged on each fixed supporting leg in a sleeving mode; a movable supporting leg is arranged below each sleeve; a supporting block is arranged below each movable supporting leg; a wheel plate frame with a rolling wheel is arranged on each supporting block; a rotary drum cutter is arranged in the middle position of the interior of the machine cover; a fixed drum cutter is arranged on the outer side of the rotary drum cutter; left and right partition plates are arranged on the shell of the fixed drum cutter; left and right hobs are arranged above the fixed drum cutter; a feeding port is arranged above the left hob and the right hob; and a material collecting cylinder is arranged at the outer bottom end of the fixed drum cutter. The movable lifting type plastic garbage crushing device is novel in structure and clear in working principle, and compared with traditional waste plastic equipment, height adjustment can be carried out and mobile operation can becarried out, thus the crushing efficiency is improved, the development of the waste plastic recycling industry is promoted, prevention of the problem that the white pollution is intensified is facilitated, and the device has important significance on the environment protection.

The invention discloses an automatic lifting device for a wind speed monitor for a wind tunnel. The automatic lifting device comprises a bottom plate; a portal bracket is fixedly connected to the bottom plate; a rotating threaded stand column is arranged between a cross beam at the top of the portal bracket and the bottom plate; inclined supporting rods are respectively and fixedly connected between the tops of the two stand columns of the portal brackets and the bottom plate; a horizontal lifting bracket is movably connected to the two stand columns of the portal bracket and the rotating threaded stand column through a transverse bracket of the horizontal lifting bracket; a three-dimensional pulsation anemometer is fixedly connected to an extending bracket of the horizontal lifting bracket; a gear transmission device is connected to the bottom of the rotating threaded stand column, and is sequentially connected with a stepping motor and a pulse signal receiver which are mounted on the bottom plate; and the pulse signal receiver is connected with a programmable stepping motor controller positioned outside the bottom plate through a connecting wire. The automatic lifting device is simple in structure, low in cost, clear in operating principle, and good in real effect, and occupies a small space.

The invention provides a deformable parallel three-dimensional dynamic force sensor which mainly comprises a fixed base, a force measuring plate and three force measuring branches with the same structure. On the fixed base, three equal-altituded side support columns are distributed in a normal triangle, and the other center support column is located at the center of the normal triangle. A guide rail of the same angle with the fixed base is arranged between each side support column and the center support column. Each force measuring branch comprises a cylindrical pair, a first rotation pair, a connection rod, a second rotation pair, a tension and compression type single-dimensional force sensor and a spring. The lower end of each force measuring branch is in sleeve joint with a guide rail, and the upper end is connected with the force measuring plate. According to the invention, force measuring requirements of a space three-dimensional dynamic force can be met; when measurement is carried out, the sensor can produce large deformation, and the mapping relationship between input and output is always constant during the deformation; and the sensor is assembled by separate components, has the advantages of symmetrical structure, simple manufacture and easy serialization, and can be applied to a variety of occasions needing space three-dimensional dynamic force measuring.