8results about How to "Improve deflection problem" patented technology

This invention provides a shield tunnel construction anti-deviation structure, including a shield machine (TBM), with a tunnel segment connected to one axial side of the TBM. An adjustment mechanism is provided between the TBM and the tunnel segment, adapted to drive the TBM to move radially along the tunnel segment. A positioning groove is formed on the side of the TBM facing the tunnel segment, and a protective opening communicating with the positioning groove is formed on the radially outer side of the TBM. The protective opening is an openable and closable protective opening. This shield tunnel construction anti-deviation structure, through the coordinated arrangement of the sensing mechanism and the adjustment mechanism, utilizes an angle sensor and an angle sensing plate to quickly sense the angular deviation of the TBM, facilitating the adjustment mechanism to deflect the entire TBM, and enabling the TBM to adjust its attitude within a small range, reducing cutterhead wear and increasing the service life of the TBM.

The utility model discloses a bicycle parking frame, and one side of the interior of a mounting L-shaped plate is rotatably connected with a telescopic supporting rod, and the other side of the interior of the mounting L-shaped plate is rotatably connected with a deflection supporting rod. Through a first limiting arc groove in the mounting L-shaped plate, the telescopic supporting rod can conveniently drive a first supporting wheel to deflect; a telescopic supporting rod is locked and limited through a locking rotary knob, so that the wheel is preliminarily supported, a deflection supporting rod conveniently drives a second supporting wheel to deflect through a second limiting arc groove in a mounting L-shaped plate, and under the supporting effect of a supporting torsional spring, the deflection supporting rod is preliminarily supported and limited conveniently; the first supporting wheel and the second supporting wheel are rotated to be attached to the edge of the bicycle wheel, so that the bicycle wheel is effectively supported, and the stability of the parking frame in the actual bicycle supporting process is ensured.

The application relates to the technical field of starting motors, and particularly discloses a fan heat dissipation type starting motor for a centrifugal pump, which comprises a base and a machine shell fixedly connected to the base, a strip-shaped air inlet is arranged on the machine shell and penetrates through the inside and outside of the machine shell, a filter screen for shielding dust is arranged in the strip-shaped air inlet, a rotor is arranged in the machine shell, and a transmission shaft penetrates through the rotor coaxially. At the beginning of starting, the fan blade cannot rotate at high speed, so that the starting response slow degree and the starting current size of the centrifugal pump can be reduced, the additional energy consumption loss of the motor at the initial stage of starting can be reduced, the windward area of the fan blade at the initial stage of starting of the starting motor is small, so that the rotating resistance of the fan blade can be reduced, the starting response slow degree and the starting current size of the centrifugal pump can be further reduced, and the additional energy consumption loss of the motor at the initial stage of starting can be further reduced.

This application discloses a control valve, including a drive assembly, a valve body, a first valve core, a second valve core, a first drive shaft, and a second drive shaft. The drive assembly includes a first drive member and a second drive member. The first valve core is drivenly connected to the first drive member via the first drive shaft, and the second valve core is drivenly connected to the second drive member via the second drive shaft. The valve body includes a first limiting portion and a second limiting portion. The main body of the first valve core has a spherical structure, and the first valve core can deflect around the first limiting portion so that there is an angle between the axis of the first valve core and the axis of the cavity wall of the first chamber, and / or, the main body of the second valve core has a spherical structure, and the second valve core can deflect around the second limiting portion so that there is an angle between the axis of the second valve core and the axis of the cavity wall of the second chamber. This facilitates stable cooperation between the valve core and the corresponding drive member.

The application provides a high-entropy niobate ceramic with high-temperature water vapor sintering resistance and high fracture toughness, a preparation method and application thereof, and belongs to the technical field of thermal barrier coating materials for hydrogen hybrid combustion engines.The high-entropy niobate ceramic prepared by the application can promote crack deflection and bridging through ferroelastic domain and super-dense dislocation, consume crack propagation energy, and thus improve the fracture toughness of the coating, so that the fracture toughness of the coating is comparable to that of YSZ; on the other hand, the high-entropy niobate ceramic can form a covalent bond with water vapor adsorbed on the surface, the covalent bond has strong binding force, and the hydroxyl group cannot move; meanwhile, high-temperature water vapor can reduce the surface energy of the high-entropy niobate ceramic, promote the diffusion of particles to the neck, increase the curvature radius of the neck, and reduce the diffusion driving force, so as to inhibit sintering; the high-entropy niobate ceramic is doped with multi-element rare earth elements to obtain an "entropy-stable" high-entropy niobate, so that the high-entropy niobate ceramic material has high-temperature phase stability, high-temperature water vapor sintering resistance, high-temperature thermal insulation performance and high fracture toughness.

This utility model relates to the field of ball valve manufacturing technology and discloses a valve core feeding device for ball valve production. The device includes a feeding rack with a feeding groove at its center and an auxiliary feeding assembly on its top. Through the auxiliary feeding assembly, this device, during the continuous movement of the transmission belt, uses multiple sets of push plates to divide the ball valve cores vibrating and feeding them into the feeding groove. One ball valve core is accommodated between every two sets of push plates, allowing for intermittent feeding. Furthermore, the turning of a single ball valve core within the gap between two sets of push plates does not affect the turning correction of other ball valve cores. Simultaneously, the arrangement of several contact wheels reduces the friction experienced by the ball valve cores during vibration turning correction, ensuring the directional feeding accuracy of the ball valve cores and improving the device's performance.

This invention relates to the field of tree transport frame technology, specifically a tree transplanting device for landscaping construction based on a green and environmentally friendly approach. It includes a support frame assembly, within which a stabilizing mechanism is installed. The stabilizing mechanism contains a support plate, and a support plate is mounted on the upper end of the support plate. An adjusting mechanism is provided on the support plate, and the adjusting mechanism has multiple partitions. Two diagonal rods are rotatably connected to one side of each partition. This invention allows for adjustment of the distance between adjacent connecting frame assemblies as needed, and can carry transplanted trees via a conveyor belt assembly. It can also move multiple trees simultaneously and automatically control the rotation of the conveyor belt assembly, enabling the trees to move under the action of the conveyor belt assembly and rubber vertical shafts, automatically placing the trees into the corresponding planting holes, thus improving transplanting efficiency.

The application relates to a light periclase-zirconite aggregate with a core-shell structure and a preparation method thereof.The technical scheme is as follows: 84.0-96.0 wt% of magnesium hydroxide powder and 4.0-16.0 wt% of zirconite powder are used as raw materials, 2.0-5.0 wt% of aluminum hydroxide powder and 2.5-5.0 wt% of polyvinyl alcohol of the raw materials are additionally added, stirring is carried out, forming is carried out, drying is carried out, then the temperature is kept at 800-1100 DEG C for 1-3 hours, then the temperature is kept at 1400-1600 DEG C for 1-4 hours, cooling is carried out, crushing is carried out, screening is carried out, and packaging is carried out, so that the light periclase-zirconite aggregate with a core-shell structure is prepared.The light periclase-zirconite aggregate with a core-shell structure prepared by the application has the characteristics of high closed-pore porosity, small pore size, high strength, low thermal conductivity, excellent thermal shock resistance and excellent corrosion resistance.