51results about How to "Reduced design strength" patented technology

A transmission is provided which has a very compact system configuration and is capable of exerting high energy efficiency over all speed regions from a low speed region to a high speed region, while providing improved operability free from a torque shortage. To this end, the transmission has an input shaft 3, an intermediate output shaft 8, a planetary gear mechanism 9, a first pump-motor 7, and a second pump-motor 15 connected to the first pump-motor 7, the input shaft 3 being coupled to a first element (planetary carrier 12) of the planetary gear mechanism 9, the second pump-motor 15 being coupled to a second element (sun gear 19) of the planetary gear mechanism 9, the intermediate output shaft 8 being coupled to a third element (ring gear 16) of the planetary gear mechanism 9, and the transmission further comprising a switching mechanism (synchromesh mechanism 6) for selectively coupling the first pump-motor 7 to either the input shaft 3 or the intermediate output shaft 8.

The invention provides a circularly polarized antenna array having a spinning characteristic in a space structure. The circularly polarized antenna array is provided with an antenna array face divided into a plurality of sub arrays. The antenna array face adopts a circularly polarized antenna sub array structure having the spinning characteristic and is divided into the plurality of rectangular sub arrays (10). Each of rectangular sub arrays (10) is provided with four spinning units which is equivalent to one spinning sub array in the space structure and adopts four pendulous cross dipole antenna units as a group, rectangular array arrangement is formed in a space, and four pendulous cross dipole antennas of each sub array are respectively arranged on top points of four corners of each rectangular array and are clockwise arranged in 0-degree, 90-dgree, 180-degree and 270-degree spinning mode. By adopting the circularly polarized antenna array, the circularly polarized radiation performance can be achieved well, and design size of each unit is not required to be changed.

The invention belongs to a wet material granulation principle and an equipment combination process, and particularly relates to a combined-type granulator. The combined-type granulator comprises a plurality of layers of combined box bodies, a temporary storage feed bin and a plurality of layers and groups of roller mills. Each group of roller mills is equipped with a rotary joint, a cleaning blade, an elastic stripping frame, a material baffle and a guide plate; a waste gas emptying interface is also arranged on each of the box bodies, and an air inlet at a lowest layer of the granulator is arranged on a bracket. The linear velocity of a tooth surface and the flow rate of volume of a rotary drum of each of the roller mills at a second layer are higher than those of a rotary drum of each of the roller mills at a first layer, and the linear velocity of a tooth surface and the flow rate of volume of a rotary drum with a reticular tooth socket or a single radial tooth socket of each of the roller mills at an adjacent lower layer are designed according to the volume properties of materials in the area. According to the granulator disclosed by the invention, hard foreign matters can be stripped, and simple granulation of soft materials in a cream state, a paste state, a slurry state and the like can be realized; meanwhile, caky and blocky materials can be pulled into monomer granules, soft and hard materials can simultaneously enter into the granulator, and granules at an outlet have a plurality of pores and are in an irregular shape.

The invention discloses a cage type CT scanner, which reduces and eliminates vibration of the CT scanner itself mainly by reducing the volume and weight of the CT scanner, the rotational radian of a rotating part and the vibration amplitude of the whole machine at the same time in order not to balance correction to eliminate the drive eccentric force and other measures. The cage type CT scanner eliminates a mechanical transmission chain belt cover to reduce the number of components in a motor structure, which not only reduces the cost, also meets the work requirements of the ground, and thus the CT scanner using site becomes wider.

The invention discloses a main load-bearing structure suitable for a ballistic reentry recovery capsule, and belongs to the technical field of load bearing of a recovery capsule. The main load-bearing structure suitable comprises a head shell, a stabilizing flare, a flare bottom, an instrument panel, a transition bracket, a support base, a platform, a parachute bay device and a pull rod, wherein two ends of the stabilizing flare are respectively butted with the head shell and the flare bottom; the instrument panel is fixed to an upper end frame of the stabilizing flare; the transition bracket is coaxially mounted on the bottom surface of the instrument panel; the platform is connected with the middle bulkhead of the stabilizing flare; the support base is fixed to the upper surface of the platform; the support base is connected with the transition bracket; after a mounting end of the parachute bay device penetrates through the platform, the mounting end is connected with the support base and the transition bracket, and a parachute deployment end is connected with the stabilizing flare through the pull rod after penetrating through the stabilizing flare; a circular gap of the flare bottom is sealed by the spherical surface of the parachute deployment end of the parachute bay device; the structure can bear up under complicated reentry load conditions, meet the requirements of equipment mounting, increase the transversal fundamental frequency of the capsule body, and achieve lightweight design on the premise of satisfying rigidity and strength.

The invention discloses a fireproof composite wall for building protection. The simple wall comprises a bearing wall (1); multiple prestress dispersion layers (2) are transversely bonded on the two sides of the bearing wall (1) end to end; sandwich layer fillers (3) are cast in two space formed by the prestress dispersion layers (2) and the bearing wall (1); the sandwich layer fillers (3), the prestress dispersion layers (2) and the bearing wall (1) are integrally injected to form a simple wall main body. The simple wall is simple in structure and novel in design, improves the earthquake resistance of the overall wall structure, reduces the design strength and cost of wall components, meanwhile, greatly improves the shear resistance and the integrity, and has such advantages as excellent integrity, excellent earthquake resistance, higher bonding and anti-shearing capacity and excellent finished wall molding effect.

The invention relates to the technical field of ultra-hard materials, in particular to a hinge beam assembly and a novel synthesis press. The hinge beam assembly comprises a body, a thrust column, a small-stroke ultrahigh-pressure oil cylinder, a threaded part and a driving device. The thrust column is slidably arranged on the body along a first preset direction, the small-stroke ultrahigh-pressure oil cylinder is arranged at the front end of the thrust column, transmission and bearing connection between the body and the thrust column is formed by the threaded part, and the driving device andthe threaded part are in transmission connection. The thrust column is driven to reciprocate along a first preset direction, the small-stroke ultrahigh-pressure oil cylinder generates ultrahigh-pressure thrust, and the thrust column transmits bearing force to the body. The novel synthesis press is formed on the basis of the hinge beam assembly.

The invention discloses a supporting system of a slant cement soil mixing pile foundation pit. The supporting system comprises a slant gravity wall, a cement soil supporting wall where structural steel or precast piles are slantly inserted, double rows of slant pile supports, double rows of pile supports and a gravity and slant supporting combined gravity wall, wherein one row of pile support is straight, and the other row of pile support is slant. In the slant gravity wall, vertical cement soil mixing piles are changed into cement soil mixing piles with certain angles. In the supporting wallwhere structural steel (or precast piles) is (or are) slantly inserted, the structural steel (or precast piles) is (or are) added into the slant cement soil mixing piles. In the double rows of slant pile supports or the double rows of pile supports, two rows of piles are connected through a crown beam. In the gravity and slant supporting combined gravity wall, the slant cement soil mixing piles are driven into one side of the slant gravity wall or the traditional vertical gravity wall to serve as supporting of the gravity wall. According to the supporting system, pile top displacement is reduced to a large degree, the pile body bending moment is reduced, the supporting engineering cost is reduced, the excavation depth is increased, and meanwhile the possibility that overturn damage happensto the foundation pit is reduced.

The invention discloses an active inclined dual pile row foundation pit supporting method. The method comprises the following steps that (1) front-row supporting piles inclined towards the interior ofa pit and back-row supporting piles inclined towards the outer portion of the pit are driven to the pile bottom design elevation along the inner side of a foundation pit edge, and meanwhile a waterproof curtain is arranged behind the back-row supporting piles; (2) a jack is arranged at the pile top of each front-row supporting pile; (3) crown beams are arranged on the front-row supporting piles and the back-row supporting piles, and the crown beams on the front-row supporting piles and the back-row supporting piles are connected into a whole through connecting beams; and (4) the soil definedby the front-row supporting piles is excavated to the pit bottom design elevation, and in the excavation process or before excavation, the jacks arranged in the step (2) are adopted for applying control expansion force to the front-row supporting piles so as to reduce displacement of the soil and the pile tops. By means of the method, the pile top displacement can be reduced to a large degree, thebending moment of pile bodies and the engineering cost can be reduced, the excavation depth can be increased, and the possibility of toppling damage happening to the foundation pit can be reduced.

The invention discloses an active X-shaped double-row pile foundation pit supporting method. The active X-shaped double-row pile foundation pit supporting method comprises the following steps of (1) driving front-row vertical support piles to the pile bottom designed elevation along the inner side of the edge of a foundation pit, driving inclined rear-row support piles to the pile bottom designedelevation in the pit and meanwhile arranging a water isolation curtain behind the rear-row support piles; (2) arranging a jack on the pile top of each rear-row support pile; (3) arranging crown beamson the front-row vertical support piles and the rear-row support piles, and connecting the crown beams on the front-row vertical support piles and the rear-row support piles into a whole though connecting beams; and (4) excavating a soil body surrounded by the front-row vertical support piles and the rear-row support piles to the pit bottom designed elevation and applying control expansive force to the rear-row support piles through the jacks so as to reduce displacement of the soil body and the pile tops. Through the active X-shaped double-row pile foundation pit supporting method, the displacement of the pile tops can be reduced to a great extent, the bending moment of pile bodies can be reduced, the construction cost can be reduced, the excavation depth can be increased, and the possibility of collapse and damage to the foundation pit can be reduced.

The invention discloses an adjustable skid undercarriage for an unmanned helicopter. The adjustable skid undercarriage comprises a high-damping telescopic actuating rod, a bidirectional equal-rigidity tension-compression type buffer, a split bow beam and a variable-length skid; wherein the top ends of the two high-damping telescopic actuating rods in the same group are hinged to the unmanned helicopter body, and the bottom ends of the two high-damping telescopic actuating rods in the same group are hinged to the split bow beams on the two sides respectively. The two ends of the two-way equal-rigidity tension-compression type buffer are hinged between the split type bow beams on the two sides; the two-way equal-rigidity tension-compression type buffer and the two high-damping telescopic actuating rods form a stable triangular mechanism; the split type bow beams are hinged to the unmanned helicopter body around the longitudinal axis of the unmanned helicopter, and the split type arch beam and the variable-length skid are connected through a connecting spherical hinge. The arched beam can be rotationally folded and unfolded along the longitudinal horizontal line of the helicopter, passive absorption impact kinetic energy of the undercarriage is reduced, the landing angle of the undercarriage is freely adjusted, so that the adaptability of the undercarriage and task equipment such as a photoelectric pod is improved.

The invention discloses an installation method of a column foundation of an overhead contact system on a railway steel-concrete composite girder. The installation method of the column foundation of the overhead contact system on the railway steel-concrete composite girder comprises the steps of assembling, lifting and installing supporting parts, then embedding reinforcing steel bars on the top parts of the all supporting parts and the top part of a main girder, pouring, and accomplishing the installation of the column foundation. By adopting the method, the column foundation of the overhead contact system can be conveniently constructed, the pouring forming quality of a concrete layer is effectively improved, temporary construction measures such as independently arranging a template are reduced, the installation efficiency and the quality of the column foundation are effectively improved, the construction period is shortened, the lifting and the installing of follow-up stand columns can be carried out conveniently, the perpendicularity and the stability of the stand columns are favorably ensured, the occurrence of the phenomena of rod collapse and sedimentation is avoided, reinforcing steel bars on flanges of a bridge floor have no need to be densified, the design strength and the construction difficulty are effectively reduced, materials are favorably saved, the increase of the construction cost of bridge engineering is avoided, installation positions of the stand columns can be planned conveniently, the operating quality of the contact system is improved, the economicalefficiency is improved, and the safety of a railway power transmission line is improved.

The invention belongs to the technical field of aircraft structure design, and particularly relates to a method for determining the position of a wing body fusion body aircraft main beam. The method comprises the following steps: 1) making a necessary cabin body opening on the entity, such as an undercarriage cabin and an equipment cabin, and forming a wing body fusion area with an opening; 2) carrying out finite element entity modeling, setting a unified material attribute, setting a boundary condition, and applying a load; 3) performing topological optimization analysis, and setting the minimum structural weight as an optimization target to obtain an optimization analysis result; and (4) determining the positions of the front beam and the rear beam according to an optimization analysis result. Compared with the traditional structure design, the method has the advantages that the iteration process of the structure design and strength checking can be greatly reduced, the design periodis shortened, the design efficiency is improved, the cost is saved, and the determined position of the main beam is more accurate.

The invention relates to a rotary trolley body which is supported by trolley support beams of a trolley rotary frame; the rotary trolley body and the trolley support beams are arranged along a ring cold machine at intervals in sequence. The rotary trolley body comprises a trolley preposed end and a trolley postpose end which are arranged on the trolley rotary frame, and also comprises a spherical hinge seat arranged on the trolley preposed end and trolley support wheels arranged on the trolley postpose end; the spherical hinge seat is mounted on the support beam of a preposed trolley; hard contact is arranged between the bottom of the front support plate of the support beam of a postpose trolley and a trolley lower flat through a sealing member installation support plate; and the centre line of the wheel axle of the trolley support wheels is vertically arranged below the installation support plate. The invention also provides the rotary trolley body and a rotary trolley, which are used for reducing the strength and rigidity of the trolley support beams, an inner toroidal beam and an outer toroidal beam and reducing the weight of the rotary frame on the premise of meeting application, wherein the inner toroidal beam and the outer toroidal beam are connected with the two ends of the trolley support beams.

A controller for an aircraft steering system, the controller being configured to receive a steering input representative of a desired direction of travel of a steerable nose landing gear, and to receive one or more force-based inputs representative of lateral forces acting upon the nose landing gear, wherein the controller is adapted to automatically adjust the steering input based upon the force-based input(s) so as to output an adjusted steering command for a steering actuator of the nose landing gear.

The invention discloses a tractor axle with a planetary speed reducing mechanism, which consists of an axle main speed reducing mechanism assembly, a planetary gear speed reducing mechanism assembly and a wheel hub mechanism assembly. The main speed reducing mechanism assembly is internally provided with a main speed reducing assembly and a main speed reducing differential lock operating mechanism; the planetary gear reducing mechanism assembly is respectively designed at two ends of the axle main reducing mechanism assembly and is internally provided with the planetary gear reducing assembly;and the wheel hub mechanism assembly is provided with a brake system mechanism and a wheel hub seat. The planetary speed reducing mechanism assembly is designed at two sides of the axle main speed reducing mechanism assembly, so that a second deceleration can be realized after the main deceleration of the axle; the planetary gear speed reducing transmission and coaxial output are adopted; and theplanetary speed reduction mechanism assembly is compact in structure, high in strength and large in transmission torque. Under the condition of the same wheel edge output torque, the design strengthof the transmission system and the main reducing gear can be reduced, so that the transmission system and the main reducing gear assembly can be designed to be smaller and more compact, and the purposes of reliable use and light weight manufacture can be achieved.