30results about How to "Avoid uneven loading" patented technology

The invention discloses a fit clearance continuously-adjustable thrust rolling bearing test bench, and belongs to the technical field of bearing working performance testing. The fit clearance continuously-adjustable thrust rolling bearing test bench includes a support plate, an elastic coupling and a control device. A main thrust rolling bearing, an oil pool and a lever loading device are arrangedabove the support plate; and a drive machine is arranged below the support plate. An oil hole is formed in the center of a bearing upper cover. A thrust rolling bearing to be tested is installed in abearing seat, and fit clearance continuous adjustment is performed on an inner ring of a seat ring of the thrust rolling bearing by using fitting of a semi-conical hollow shaft and a tapered pin. Thebearing seat and a bearing seat tray are connected through countersunk screws; and the bearing seat tray and a rotary main shaft are connected through a flat key. The invention adopts a mechanical manner, and the inner and outer rings of the bearing seat ring are double-fitted, the fit clearance of the thrust rolling bearing is continuously adjustable, and the fitting type under different loads can be satisfied without replacing parts; and the structure is simple, the operation is safe, and the bearing replacement and disassembly are convenient and reliable.

The invention discloses a method for preparing a six-core MgB2 superconducting wire by a magnesium diffusion method. The preparing method comprises the steps that first, a niobium strip coil is manufactured to be a niobium tube, amorphous boron and SiC mixed powder are filled into the niobium tube with a metal magnesium rod being used as a centering rod, and continuous groove rolling is conducted to obtain single-core wires; second, a Cu-Nb composite rod and the single-core wires are placed in an oxygen-free Cu tube to be assembled to obtain a secondary composite body, and the six-core wire is manufactured by route processing through the technology with drawing and rolling combined; third, the two ends of the six-core wire are sealed to be protected and then are coiled, and then the six-core wire is placed on a stainless steel plate, phase heat processing is conducted in an annealing furnace, and the six-core MgB2 superconducting wire through magnesium diffusion is obtained. The core wire of the wire prepared by the method is higher in compactness, meanwhile, uneven tubulating caused by human factors is avoided, the tubulating process is suitable for full-automatic mechanical operation, mass production is facilitated while the evenness of tubulated powder is guaranteed, and therefore the production efficiency of the wire is greatly improved.

The invention relates to a printed circuit, in particular to a clamping pin positioning drilling machine and a clamping pin positioning method. The clamping pin positioning drilling machine provided by the invention comprises a working platform; the working platform is provided with an origin positioning hole and a positioning groove of a clamping pin; the origin positioning hole and the positioning groove are collinear; the origin positioning hole is internally provided with a first positioning sliding block which is connected with a first pushing and clamping mechanism; and the positioning groove is internally provided with a second positioning sliding block which is connected with a second pushing and clamping mechanism. The invention also provides the clamping pin positioning method and has the benefits that an electric wood board does not need to be used, the production cost is reduced, the unsmooth plate installation is avoided, the drilling quality is improved, processes performed on the drilling machine are reduced and the utilization rate is improved.

The invention belongs to the technical field of essential oil production, and particularly relates to a plant aromatic essential oil preparation and extraction process which comprises the following steps: 1, steam heating: putting a plant containing aromatic substances into a distiller, and introducing water vapor into the distiller from the bottom of the distiller; 2, condensing and standing: introducing the water vapor mixed with the aromatic essential oil component into a condenser, and standing to obtain an oil-water mixed solution; 3, filling and shaking: filling the oil-water mixed solution into a separating funnel, and then shaking the separating funnel; and 4, layered extraction: standing the shaken separating funnel, and carrying out layered extraction after the oil-water mixed solution is layered; The step 3 is completed by adopting a plant aromatic essential oil preparation and extraction device in a matching manner. The uniformity of the filling amount when the oil-water mixed solution is filled into the separating funnel is improved, meanwhile, the mixing effect of the oil-water mixed solution is improved, and the situation that the separating funnel is broken is avoided.

The invention discloses a sampling device of a urine analyzer. The sampling device comprises a sample disc, a sample injection mechanism, a vertical conveying mechanism, and a transverse conveying mechanism; the sample disc is provided with urine cup holes; urine cups are placed in the urine cup holes; the sample disc is driven by a driving motor 1 to rotate, and positioning is realized through controlling the stride of the driving motor 1; an elevating cylinder is arranged right below a urine cup hole at the rightmost side of the sample disc; the sample injection mechanism comprises a sampleinjection rotating disc and microscale sample injection devices; the sample injection rotating disc is provided with through holes; the microscale sample injection devices are arranged in the throughholes; the sample injection rotating disc is driven by a driving motor 2 to rotate, and positioning is realized through controlling the stride of the driving motor 2; the vertical conveying mechanismcomprises a driving motor 3, and a vertical conveying belt; the transverse conveying mechanism comprises a driving motor 4, and a transverse conveying belt. The sample device is invented based on improvement of a conventional urine analyzer sampling device, so that continuous sample injection function is achieved, nonuniform sample injection caused by artificial sample injection is avoided, artificial errors caused in detection process are reduced, and detection precision and automatic degree are increased.

The invention relates to a quantitative rock soil ore loading station, which is a device capable of loading bulk cargos into a railway wagon by a hopper. The quantitative geotechnical ore loading station comprises a steel structure frame, and a conveying belt machine head arranged at the topmost end of the steel structure frame, wherein a buffer bin with a double-wing radial gate, which is arranged on the steel structure frame, is arranged below the conveying belt machine head, and a quantitative bin with a double-wing radial gate, which is connected with the steel structure frame by a weighing device, is arranged below the buffer bin; and a swing type chute with a radial gate, which is arranged on the steel structure frame, is arranged below the quantitative bin, and an anti-wear gratingis respectively arranged on the inner walls of the oblique bin plates of the buffer bin and the quantitative bin. The anti-wear gratings allow the gratings in the bin wall plates to be filled with materials after loading and protect the bin wall plates, and the curvilinear motion formed by the closing of the swing type radial gate can effectively prevent large-particle materials from being stuck and ensure the closing of the gate; and the swing type chute with the radial gate can effectively control rock soil material flow and prevent the rock soil from vertically falling down to cause too great impact on the wagon.

The invention provides a force transmission device which is formed by two semi-disc-shaped components. The two semi-disc-shaped components have the predetermined thickness, and can be combined together to form a cylinder. Grooves penetrating through the semi-disc-shaped components in the thickness direction are formed in the respective combination faces of the two semi-disc-shaped components. After the two semi-disc-shaped components are combined, the two grooves are combined to form a combination hole in smooth transition. The combination hole can be buckled to an installing hole of a tension sensor. In the installing process, the side wall, located in the installing hole, of the combination hole and the inner wall of the installing hole are closely matched in a face contacting mode. External grooves are formed in the respective outer arc parts of the two semi-disc-shaped components in the outer circumferential direction. When the two semi-disc-shaped components are combined to form the cylinder, the external grooves in the two semi-disc-shaped components are in smooth transition in the outer circumferential direction of the cylinder, the sections of the external grooves are of arc shapes, and when installed, steel wire ropes are installed in the external grooves in the mode of being matched with the external grooves.

The invention discloses a routing method for monitoring path node energy and queue length, which overcomes the problems in the prior art that the established path is not an optimal path and uneven load easily leads to network failure. The method includes: 1. Related routing control grouping Expansion of: 1) extended routing request grouping RREQ, adding request energy flag bits etc. on the basis of RREQ grouping of AOMDV agreement; 3) Expand the format of the Hello packet, add the minimum suitability path destination address, the minimum suitability path energy flag, etc. on the basis of the Hello packet of the AOMDV protocol; 2. Expansion of the path state information; 3. Routing Request process: 4. Routing response process; 5. Nodes use Hello packets to dynamically monitor network path information.

The invention discloses a miniature loess unsaturated suction control loading device and method for a detachable pressure chamber. Indoors, the support assembly on one side of the detachable pressure chamber is provided with a displacement sensor for measuring the vertical displacement of the soil sample, and the power device is arranged above the detachable pressure chamber to provide a driving force for rotation of the detachable pressure chamber . The invention has the advantages of simple structure, convenient operation, miniaturized overall structure, and the ability to separate a sample in an unsaturated state from a loading device for scanning by high-precision CT.

The invention discloses a moving mechanism locking device and a locking method based on the inverse flexoelectric effect. The locking device includes a support rod arranged on a base, a sensitive unit and a plurality of arc-shaped metal blocks; the support rod is vertical Set on the base, the sensitive unit is a ring structure, which is horizontally set on the top of the support rod; several metal blocks are evenly arranged on the outer ring of the sensitive unit; the outer rings of several metal blocks are provided with annular insulating strips; There is a gap between the ring and the cup inner shell of the rotating device; the sensitive unit is made of flexible dielectric material, and the inner and outer sides of the sensitive unit are respectively plated with inner metal electrodes and outer metal electrodes. The invention is based on the flexoelectric effect in the crystal electromechanical coupling effect, and realizes the position locking of the moving parts. Compared with traditional electromagnets, mechanical buckles or locking screws, it is simple to use, easy to disassemble and assemble, and does not require complicated mechanical structures.

The invention discloses a motion mechanism locking device and method based on the inverse flexoelectric effect. The locking device comprises a supporting rod arranged on a base, a sensitive unit and multiple metal blocks of an arc-shaped structure. The supporting rod is vertically arranged on the base, and the sensitive unit is of an annular structure and is horizontally arranged at the top of thesupporting rod. The multiple metal blocks are uniformly arranged on the outer ring of the sensitive unit. Annular insulating strips are arranged on the outer rings of the multiple metal blocks. A gapis formed between the outer ring of each annular insulating strip and a cup body inner shell of a rotating device. The sensitive unit is made of a flexoelectric dielectric material, and the inner side and the outer side of the sensitive unit are plated with an inner side metal electrode and an outer side metal electrode correspondingly. According to the motion mechanism locking device and methodbased on the inverse flexoelectric effect, position locking of a moving part is achieved based on a flexoelectric effect in a crystal force-electricity coupling effect. Compared with a traditional electromagnet, a mechanical buckle or a locking screw, the device is easy to use and convenient to disassemble and assemble, and a complex mechanical structure is not needed.

A data transmission method and apparatus avoids uneven loading of stored data, supports allocation of storage spaces with load balancing, and supports fast access to data. The method may include receiving, by a distributed storage system, data and a corresponding data key sent by a client. Nodes are allocated to the data according to load conditions of nodes in the distributed storage system. The data is stored in the corresponding nodes. A constructed key is generated for the data, which includes the data key and node routing information corresponding to a location where the data is stored. The constructed key is returned to the client. The client uses the constructed key to acquire the stored data. The distributed storage system receives the constructed key, retrieves the stored data based on the routing information in the constructed key and sends the data to the client.

The present invention proposes a fast underground excavation construction method for large-span shallow-buried tunnels, in which, the large section of the large-span tunnel is decomposed into multiple small-section forms by using the middle partition wall and cross braces, and the tunnel is segmented and batched and intermediate prefabricated Excavation by leaving the core soil column reduces the difficulty of full-section excavation of long-span tunnels. Excavation is carried out from the pilot pits on both sides of the upper vault first, which can effectively use the soil arch support effect at the top of the tunnel, and can also be used as a construction channel for subsequent excavation; synchronous and symmetrical excavation on both sides can maintain the force balance during excavation and avoid Uneven stress; the reserved core soil column can be used as the supporting point for the whole construction process to prevent the overall instability and damage of the tunnel; the temporary support of the middle partition and cross brace can ensure the collapse of the top and the expansion and extrusion damage of the side wall and bottom , the supporting structure and construction method proposed by the present invention are safe and practical, with reasonable steps, simple construction, low operation difficulty and efficient process.

The method belonging to CDMA mobile communication area includes following steps. A package data service node (PDSN) selects and joins a cluster group. Each PDSN broadcasts timed or not timed information of own cluster. PDSN records information from other PDSN onto 'cluster PDSN table' and 'cluster MS table'. When a user is switched in a PDSN, the PDSN queries cluster MS table first. If the user is found in the table, the PDSN recommends the user to PDSN just switched in; otherwise, the MS is a new user. PDSN queries cluster PDSN table for new user. A PDSN with most light load is found. The new user is recommend to a PDSN with most light load. The invention realizes load balancing and intelligent selection between PDSNs in cluster so as to prevent unnecessary switching and reduce communication discontinuity in moving procedure.

The invention discloses a gear and rack lifting device. The gear and rack lifting device comprises a driving gear box, a driving gear assembly, a driven gear assembly and an installation rack. The driving gear box, the driving gear assembly and the driven gear assembly are all installed on the installation rack. The driving gear box comprises a driving gear. The driving gear assembly comprises a first external gear, a second external gear and a first climbing gear. The first external gear, the second external gear and the first climbing gear are connected together in sequence in a coaxial manner. The first external gear is engaged with the driving gear. The driven gear assembly comprises a driven external gear and a second climbing gear. The driven external gear and the second climbing gear are connected together in a coaxial manner. The driven external gear is engaged with the second external gear. The first climbing gear and the second climbing gear are arranged side by side. Both the first climbing gear and the second climbing gear are used for being engaged with pile leg racks. According to the gear and rack lifting device, the bearing capacity of a gear and rack lifting systemis improved, and the manufacturing cost and maintenance cost are reduced.

The invention discloses a method for weighing and loading granular goods, in particular the method for weighing and loading coal. In the method, a device consisting of a surge bin, a quantitative bin, a quantitative bin hopper steelyard, a program controlled (PLC) electric automatic control system and a computer monitoring system is adopted. The granular goods are loaded by the method which comprises the following steps of: weighing the weight of goods in the quantitative bin by using the quantitative bin hopper steelyard; controlling hydraulic flat discharge gates of the surge bin and the quantitative bin; and closing a hydraulic flat discharge gate of a lower hopper of the surge bin after opening for 3 to 5 seconds when the quantity of the granular goods in the quantitative bin displayed on the quantitative bin hopper steelyard reaches vehicle loaded quantity. The method makes the loading quantity of a truck bed reach the standard of the vehicle loaded quantity, reduces punishment for contract breach and artificial supplement caused by the deficiency of loaded goods, and improves the accuracy of vehicle loaded goods quantity.

The invention relates to a printed circuit, in particular to a clamping pin positioning drilling machine and a clamping pin positioning method. The clamping pin positioning drilling machine provided by the invention comprises a working platform; the working platform is provided with an origin positioning hole and a positioning groove of a clamping pin; the origin positioning hole and the positioning groove are collinear; the origin positioning hole is internally provided with a first positioning sliding block which is connected with a first pushing and clamping mechanism; and the positioning groove is internally provided with a second positioning sliding block which is connected with a second pushing and clamping mechanism. The invention also provides the clamping pin positioning method and has the benefits that an electric wood board does not need to be used, the production cost is reduced, the unsmooth plate installation is avoided, the drilling quality is improved, processes performed on the drilling machine are reduced and the utilization rate is improved.

The invention discloses a thrust rolling bearing test bench with continuously adjustable fit clearance, which belongs to the technical field of bearing performance testing and comprises a support plate, an elastic coupling and a control device. The main thrust rolling bearing, oil pool and lever loading device are arranged above the supporting plate; the driving machine is arranged under the supporting plate. There is an oil hole in the center of the upper cover of the bearing. The thrust rolling bearing to be tested is installed in the bearing seat, and the fit clearance of the inner ring of the thrust rolling bearing is continuously adjustable by using the cooperation of the semi-tapered hollow shaft and the tapered pin. The bearing seat is connected with the bearing seat tray with countersunk screws, and the bearing seat tray is connected with the rotating main shaft with a flat key. The invention adopts a mechanical method, and the inner and outer rings of the bearing seat ring are double-fitted, and the fit gap of the thrust rolling bearing is continuously adjustable, and the fit type under different loads can be satisfied without replacing parts; it has simple structure, safe operation, and bearing Easy and reliable replacement and disassembly.

The invention discloses a cutter head connecting structure and a reconstruction method thereof. The cutter head connecting structure comprises a cutter head and a transmission shaft, wherein an internal spline is arranged in the cutter head, a blind hole which is coaxial with the internal spline is arranged at the inner end of the internal spline, a spline is arranged on the transmission shaft, is embedded into the internal spline and is engaged with the internal spline, and an auxiliary shoring cylindrical rod which is coaxial with the transmission shaft is arranged at the end part of the spline, extends into the blind hole and is in clearance fit with the blind hole. According to the cutter head connecting structure and the reconstruction method thereof, the radial load bearing of the spline part is achieved through arranging the auxiliary shoring cylindrical rod and the blind hole, the condition that the load bearing of the spline is uneven due to a cantilever is avoided, and the condition that the spline part is uniform in load bearing and stress is ensured, so that the damage to the spline position of equipment is avoided, the service life of the equipment is greatly prolonged, the maintenance is reduced, the maintenance cost is reduced, and the production efficiency is increased greatly; the cutter head connecting structure also has the characteristics of simple structure and low cost.

The force transmission device of the present invention is composed of two semi-disc-shaped members having a predetermined thickness and capable of being combined to form a cylinder, and a semi-circular plate penetrating through the thickness direction is formed on the joint surfaces of the two semi-disc-shaped members. The groove of the disc-shaped component, after the combination of the two semi-disc-shaped components, the two grooves are combined into a combination hole with a smooth transition, the combination hole can be fastened to the installation hole of the tension sensor, and the combination hole is located at the installation The side wall of the part in the hole is closely matched with the inner wall of the mounting hole in a surface contact manner, and an external groove is formed on the respective outer arc parts of the two semi-disc-shaped members in a manner along the outer circumference. When two semi-disc-shaped components are combined to form a cylinder, the external grooves on the two semi-disc-shaped components in the outer circumferential direction of the cylinder transition smoothly, and the section of the external groove is arc-shaped. When installing the wire rope , the wire rope is placed in the external groove in a manner that cooperates with the external groove.