22results about How to "Reduced durability" patented technology

This invention relates to machining tools and surface finishing methods using the DL (deep-drilling) method, the tools comprising ceramic-metal composites with uniformly polished surfaces. In some embodiments, the machining tool exhibits compressive stress less than -500 MPa after polishing, or equal to or greater than 40% of the compressive stress generated during the grinding process. In some embodiments of the invention, the machining tool has a uniformly polished surface along the cutting edge, i.e., perfect flatness between the metal and ceramic components of the tool, such that the roughness of the cutting edge is in the sub-micron range. In some cases, the machining tool has a roughness variation along the cutting edge and adjacent surfaces along the tool's uniform or regular cutting edge.

The utility model discloses an industrial waste residue composite cementing material preparation system which comprises a first calcining furnace, a kaolin feeding hole and a bauxite feeding hole are formed in the first calcining furnace, the first calcining furnace is connected with a first mixing kettle, and a coal ash feeding hole and a 10% sodium hydroxide solution feeding hole are formed in the first mixing kettle; the outlet end of the second calcining furnace is connected with the inlet end of the dehydrating tower, the outlet end of the dehydrating tower is connected with the inlet end of the second calcining furnace, the second calcining furnace is provided with a sodium dihydrogen phosphate feed port and a urea feed port, and the second calcining furnace is connected with the second mixing kettle; the second mixing kettle is provided with a red mud feeding hole, a coal gangue feeding hole, a metallurgical slag feeding hole and a glass water feeding hole; and the second mixing kettle is sequentially connected with the air furnace, the grinding kettle and the finished product bin. According to the utility model, the stockpiling of industrial solid wastes can be reduced, the environmental pollution can be effectively reduced, and the problem of infrastructure material shortage can be effectively relieved on the premise of ensuring the engineering quality.

The application discloses a shear connector, a steel-concrete composite beam containing the shear connector and a construction method of the steel-concrete composite beam. The shear connector comprises an inverted truncated cone type cylinder (7), a stiffener, a cover plate, a penetrating steel bar (8) and a high-strength bolt (21); the stiffener comprises an integrally formed stiffener bottom plate (13) and a stiffener side plate (14), the size of the stiffener bottom plate is consistent with the size of the lower opening of the cylinder, and the stiffener bottom plate is attached to the lower opening of the cylinder; the stiffener bottom plate is provided with a second connecting hole for connecting the high-strength bolt; the stiffener side plate is arranged around the stiffener bottom plate and is attached to the inner wall of the cylinder; the height of the stiffener side plate is lower than that of the first connecting hole; the cover plate covers the upper opening of the cylinder; the penetrating steel bar transversely passes through the cylinder through the first connecting hole and leaves a connecting section on each side of the cylinder; and the high-strength bolt connects the stiffener bottom plate through the second connecting hole. The application realizes the disassembly and replacement of each component of the shear connector and the prefabricated bridge deck; and the structure form and stress performance of the shear connector are optimized.

The utility model relates to bridge engineering technical field, and disclose a kind of steel box girder and concrete pier column consolidation structure, including steel box girder, concrete pier column, shear nail and the adjusting member for adjusting the elevation of steel box girder installation, concrete pier column top is reserved with shear key, steel box girder bottom is equipped with for with concrete pier column top socket joint connection's notched, concrete pier column top outer circumferential wall is equipped with the slope of being inserted easily, concrete pier column top is inserted in the inside of notched, adjusting member includes jacking corbel and jack, jacking corbel is connected by bolt with the reserved planting bar on the outer wall below concrete pier column, jack is installed in jacking corbel top, jack top and steel box girder bottom are abutted. The present application is simple in structure, high in precision of factory prefabrication, force transmission is direct in socket design, stress concentration is small, and the elevation of section member is accurately adjusted, convenient for construction, applicable to complex environment and large-span bridge.

The utility model discloses a novel protection layer structure of a prefabricated vertical component, which relates to the field of concrete structure construction, the cross section of the structure is a component main body of a rectangular cylinder, a main framework support is arranged in the component main body, a groove is arranged on the side surface for accommodating a transverse steel bar, a curved surface reed is arranged at the opening of the groove, and U-shaped hooks inclined inwards are arranged at the two ends of the component main body. Materials of the main framework are selected according to the thickness of a vertical component, and a component body is filled with fine aggregate concrete or high-strength mortar. The working mechanism is as follows: firstly prefabricating the tire membrane, installing the main framework and the hook during cast-in-place, and pouring the filler. The structure can effectively avoid many defects caused by the fact that the protective layer is too thick or too thin, and compared with the prior art, the structure has the remarkable beneficial effects of guaranteeing structural stability, preventing steel bar corrosion, improving construction quality and structural performance and the like.

The invention provides a relay device for a vehicle, which can restrain a movable member from shaking at a standby position of the movable member pressed by a return spring. A relay device (4) for a vehicle is provided with: a movable member (11) having a conductor (13); electrode relays (14, 15) which are brought into a conductive state by bringing the conductor (13) into contact with the electrode relays (14, 15) by the movement of the movable member (11); an elastic member (17) that presses the movable member (11) in a predetermined direction; and a housing (8) that accommodates the movable member (11), in which a recess (19) into which the movable member (11) is fitted when the movable member (11) is pressed by the elastic member (17) is formed in the housing (8), and the recess (19) is provided with an inclined surface (19a) that is inclined with respect to the movement direction of the movable member (11) and that is in contact with the movable member (11).

The invention provides a steel slag-based building material and a preparation method thereof. The steel slag-based building material comprises a steel slag matrix, and a micro-dot array layer, a nano rough layer and a fluoride-free low-surface-energy interface layer are sequentially formed on the surface of the steel slag matrix; the micro-dot array layer comprises bulge structures which are distributed on the surface of the steel slag matrix in an array manner. According to the steel slag-based building material provided by the invention, the convex structures distributed in the micro-dot array layer in an array manner are compounded with the nano rough units in the nano rough layer, so that double-scale rough is formed, the surface layer adopts a low-interface-energy interface, the interface free energy and adhesion work of the surface of the building material are reduced, the friction performance of the building material is guaranteed, and the service life of the building material is prolonged. And low adhesion, hydrophobicity and durability of the steel slag-based building material are realized.

This invention relates to the field of mechanical assembly tooling technology, specifically to an installation device for a double-layer filter screen of a crusher. The device includes a hollow shaft. Through the cooperation of variable-diameter positioning components at both ends of the hollow shaft and a guiding installation component, a stable coaxial reference can be established using the center hole of the crusher rotor. The connecting rod between the second and first connecting rods drives the contact block to expand radially synchronously, causing the arc-shaped friction block to conform to the hole wall and complete the tooling positioning. No modification to the crusher body structure is required. An auxiliary handle drives the threaded rod to rotate, and the guide diameter formed by the guide frame is adjusted via a pull rod transmission. The adjustment size can be intuitively controlled using a scale and indicator needle. The auxiliary rollers on the guide frame reduce the pushing resistance of the filter screen cylinder, minimizing scratch damage to the inner wall and effectively improving the alignment efficiency and installation accuracy of the inner filter screen cylinder. It can adapt to reference center holes of different diameters and cylindrical workpieces of different specifications, helping to improve the tediousness of manual alignment and enhance the consistency of installation quality.

The present invention addresses the problem of suppressing any lowering of durability in a carrier of a catalyst layer. This electroconductive titanium oxide has an electroconductivity of 0.1 S / cm or greater as measured under a pressure of 10 MPa.

The application discloses an engine control method and related equipment, and relates to the technical field of new energy vehicles, and the method comprises the following steps: in the case that the duration that a target vehicle meets a preset starting condition reaches a first preset duration based on vehicle state data and driver demand data, starting the engine of the target vehicle; determining a target idle speed of the engine based on a temperature correlation parameter and a shutdown history parameter; after the engine runs at the target idle speed for a preset stable duration, determining a target operation mode according to driver operation data and a state of charge of a power battery of the target vehicle; controlling the engine to adjust from the target idle speed to a target dynamic speed; in the case that the duration that the target vehicle meets a preset shutdown condition reaches a second preset duration, shutting down the engine. The application can improve the engine start-stop stability, speed transition smoothness and operation mode matching, and reduce engine mechanical impact and energy loss.

An X-ray image acquisition device includes a pixel unit having M pixel arrays each including N pixel portions (N and M are integers of 2 or more), M circuit units, and a control unit. Each circuit unit includes T (T is an integer of N or more) adding sections that sequentially add electrical signals corresponding to output signals from the N pixel portions and a switch section for switching connection states between the N pixel portions and the T adding sections. The control unit switches the connection states in synchronization with the transportation of an object along a first direction so that the electrical signals corresponding to the output signals output from the pixel portions by detecting X-rays transmitted through the same region of the object are added by the same adding sections.

This disclosure relates to a control device for all-wheel-drive vehicles. While ensuring power performance in a differential limiting state of the power distribution device, it suppresses a decrease in the durability of the power transmission path on the front wheels. When the power distribution device is set to a differential limiting state and wheel braking torque is applied to both the front and rear wheels, torque limiting control is performed, setting the upper limit of the power source torque to a smaller value when the wheel braking torque is high compared to when the wheel braking torque is low. Therefore, for example, when a large accelerator and a large brake operation are performed in the differential limiting state of the power distribution device, it is easier to limit the torque of the power source, so it is less likely to transmit high torque to the power transmission path on the front wheels. Furthermore, for example, when the braking operation gradually decreases while the accelerator operation gradually increases in the differential limiting state of the power distribution device, the torque limitation of the power source is gradually released, so the torque of the power source increases when the rear wheels are less prone to slight slippage.

The invention discloses a non-Van der Waals artificial solid material as well as a preparation method, a thin film, a dispersion liquid and application of the non-Van der Waals artificial solid material. According to the preparation method, effective stabilization and structural transformation of a conventional MXene material are realized through a two-step method of first zinc vapor electron injection stabilization and then metal vapor bonding transformation, irreversible transformation of MXene to a rock salt structure at a high temperature can be prevented, the MXene can react with various active metal vapor, and the performance of the MXene material is improved. The invention provides a general way for controllably synthesizing a series of ultrathin non-Van der Waals artificial solid materials, solves the problem that the conventional MXene is unstable at high temperature, can be used for preparing a series of ultrathin layered materials including Al-Ti3C2 and large-area flexible films thereof, and the obtained material has high conductivity, mechanical flexibility and high-temperature oxidation resistance, and has a wide application prospect. The method has a wide application prospect in the fields of flexible electronics, high-temperature electromagnetic shielding and infrared stealth.

The invention relates to the technical field of metal composite plates, in particular to a ship metal composite plate structure and an operation method.The ship metal composite plate structure comprises a first metal plate, the inner wall of one side of the first metal plate is fixedly connected with side plates, the outer walls of the upper side and the lower side of the first metal plate are fixedly connected with top plates, and the opposite sides of the two side plates are fixedly connected with a second metal plate; the opposite sides of the two top plates are fixedly connected with the upper side and the lower side of a second metal plate. The first metal plate and the second metal plate form a tight whole through mechanical locking of the inserting rod and the cavity, when external force is borne, stress can be evenly distributed in the connecting area between the inserting rod and the metal plates instead of being concentrated on an adhesive layer interface, the bearing capacity of the structure is remarkably improved through the overall stress mode, and the service life of the structure is prolonged. The situation that the overall mechanical property and durability of the material are reduced due to the fact that the adhesive layer is prone to being influenced by factors such as environment temperature and humidity and aging and layering or debonding is generated at an interface is avoided.

An X-ray image acquisition device includes a pixel unit having M pixel arrays each including N pixel portions (N and M are integers of 2 or more), M circuit units, and a control unit. Each circuit unit includes T (T is an integer of N or more) adding sections that sequentially add electrical signals corresponding to output signals from the N pixel portions and a switch section for switching connection states between the N pixel portions and the T adding sections. The control unit switches the connection states in synchronization with the transportation of an object along a first direction so that the electrical signals corresponding to the output signals output from the pixel portions by detecting X-rays transmitted through the same region of the object are added by the same adding sections.

The present application discloses a stepped pinion capable of making the engagement of tooth surfaces appropriate regardless of the direction of the transmitted torque and simple in structure. In the stepped pinion, a large-diameter gear portion and a small-diameter gear portion are arranged at a prescribed interval in the axial direction of a rotation shaft. The large-diameter gear portion has a disc portion and a rim portion extending from the outside in the radial direction of the rotation shaft. A reinforcing member is arranged in the rim portion to support the portion extending from the disc portion toward one side in the axial direction. The reinforcing member is fixed in a state of extending to the outside in the radial direction of the rotation shaft. The inner peripheral surface of the rim portion is brought into abutment with the front end portion to limit the first inclination of the rim portion and allow the second inclination of the rim portion in the direction opposite to the first inclination in which the inner peripheral surface of the rim portion is separated from the front end portion.

This invention provides a front structure of a vehicle that offers good operability when installing and removing high-voltage wiring harnesses relative to high-voltage components located in the front region of the vehicle, and effectively protects the live parts and wiring harness connections when impact loads are applied from the front of the vehicle. In this invention, an electric compressor fixed to the front of the vehicle's engine E has a live part inside. A wiring harness connection for connecting a high-voltage wiring harness is provided in the outer peripheral region on the left side of the electric compressor in the vehicle width direction. The protective member includes: a first cover that covers the area corresponding to the live part from the front of the vehicle; and a second cover that is continuous with the first cover and located at a certain interval from the wiring harness connection to the front of the vehicle, covering the wiring harness connection from the front of the vehicle. A low-rigidity section with lower rigidity than the first and second covers is provided at the continuous portion between the first and second covers.

An embodiment of the present disclosure relates to a spectacle lens including an antifouling layer which is a condensate of an antifouling agent composition containing: 10 to 70 mass% of a compound (A) having a silyl group and a fluorinated alkyl group; and 30 to 90 mass% of a compound (B) having a silyl group at one end, a reactive group at the other end, and a polysiloxane chain structure.

The application relates to a rotary engine rotor structure and a rotary engine, and relates to the technical field of engines. The rotary engine rotor structure comprises a first rotor, the outer periphery of the first rotor is provided with at least one convex part, the profile line of the convex part comprises a top arc segment and a first transition segment and a second transition segment connected to the two ends of the top arc segment respectively; the outer periphery of a second rotor is provided with at least one inner recess part matched with the convex part, the profile line of the inner recess part comprises a concave arc segment and a first matched transition segment and a second matched transition segment connected to the two ends of the concave arc segment respectively; wherein the radii of the top arc segment and the concave arc segment are equal, and the centers of the circles are located on the rotation center axis of the first rotor; in the process of relative rotation of the first rotor and the second rotor, when the top arc segment rotates through the concave arc segment, a dynamic seal is formed between the top arc segment and the concave arc segment; the inside of the first rotor is provided with a cooling medium channel. The rotary engine rotor structure has the characteristics of good sealing performance, heat dissipation and light weight.

[Object] To provide an electric valve capable of having a valve port with a large diameter while ensuring durability. [Solution] An electric valve 1 includes a valve body (10) having a valve port (14), a valve member (40) facing the valve port (14), a rotor 51 rotatable with respect to the valve body (10), and a driving shaft (70) to which rotation of the rotor (51) is transmitted. When the rotation of the rotor (51) is transmitted to the driving shaft (70), the driving shaft (70) moves downward or upward. The driving shaft (70) pushes the valve member (40) when moving downward, pulls the valve member (40) when moving upward, and is rotatable with respect to the valve member (40).

The utility model relates to the technical field of electric vehicles, in particular to an electric vehicle temple support. Comprising a supporting arm, an integrally-formed rotating shaft mechanism is arranged at the top of the supporting arm, and an anti-skid base is arranged at the bottom of the supporting arm; the rotating shaft mechanism is of a U-shaped groove structure, the supporting arm is hinged to the frame through the rotating shaft mechanism, the rotating shaft mechanism further comprises a rotating shaft face, the rotating shaft face is parallel to the hinged portion of the frame, at least two vertical cutting seams are formed in the rotating shaft face and the cutting face adjacent to the rotating shaft face respectively, and a metal strip capable of being folded inwards is formed between the cutting seams. The metal strip is bent by 90 degrees towards the inner side of the U-shaped groove and fixed through welding. Efficient forming of the rotating shaft mechanism is achieved, material and cost limitation of the cold heading technology is broken through, the bearing capacity is greatly improved through the double-layer composite structure of the closed U-shaped groove, the scheme can flexibly meet the requirements of different materials and vehicle types, and a reliable technical path is provided for manufacturing of the electric vehicle temple support with light weight, long service life and low cost.

The utility model relates to a kind of polyurethane ball pin assembly, belong to ball pin assembly technical field.The polyurethane ball pin assembly includes: installation shell and ball pin;Protective mechanism, the protective mechanism includes the outer sleeve fixedly connected in the inner wall of installation shell, the inner wall of the outer sleeve is fixedly connected with anti-tear sleeve, the inner wall of the anti-tear sleeve is fixedly connected with inner sleeve, the surface lower end ball of the ball pin is hinged to the inner wall of inner sleeve;Through the inner sleeve of special polyurethane component has good self-lubricating characteristics, reduce the wear between the ball head of ball pin and inner sleeve, avoid frequent grease lubrication, and then guarantee the sealing effect between ball pin and inner sleeve, to reduce the wear between ball pin and inner sleeve, guarantee the service life of ball pin assembly, through the outer sleeve of special polyurethane component, inner sleeve and reinforcing rib, the impact force received by ball pin is dispersed, guarantee the stability and durability of installation shell dynamic performance, and then improve the service life of ball pin assembly.