48results about How to "Vibration will not" patented technology

The invention discloses a cooling device for a 3D printer, comprising: an annular member, which includes an annular upper part and an annular lower part, the interior of the annular upper part has a hollow annular cavity, and the annular side wall of the annular upper part is symmetrically distributed with a plurality of upper air intakes The lower end is arranged with a plurality of annular upper air outlets, and a plurality of annular air passages are arranged inside, each annular air passage is an inverted trapezoid, and the upper end of the annular lower part has a plurality of lower air inlets. The air port is aligned with an upper air outlet, so that the annular cavity is in gas communication with a plurality of annular air passages; an air pump; wherein, the annular member surrounds the outer side of the extrusion nozzle. The annular cavity of the present invention acts as a buffer to reduce the vibration of gas ejection; the inner part of the annular lower part has a plurality of concentric annular air passages to ensure that the cooling range is an evenly distributed area centered on the extrusion nozzle, ensuring the Local raw materials are cooled to the same degree without causing vibrations to the extrusion nozzle.

The invention discloses a double-layer composite tube and a manufacturing method thereof. The double-layer composite tube and the manufacturing method aim to solve the technical problems that black pigment is added into traditional HDPE tubes, accordingly inner walls are not smooth, water scale is prone to being generated, bacteria grow, and secondary pollution of water is caused. The double-layer composite tube comprises an inner layer and an outer layer, the inner layer is made of ultrahigh molecular weight polyethylene and ethylene-vinyl alcohol copolymers or low-density polyethylene, and the outer layer is made of high-density polyethylene, ethylene-vinyl alcohol copolymers and special melanin particles C of PE. The method includes the following steps of material proportioning and dehumidifying, material plastifying, material forming, vacuum sizing and spraying and cooling. The double-layer composite tube has the advantages of being good in toughness and flexibility, high in chemical stability, good in corrosion resistance, good in sealing performance, large in distribution power, long in service life, high in low temperature resistance, hygienic, free of toxin and the like. The manufacturing method is simple, easy to operate and capable of achieving integral production of the double-layer composite tube.

The invention discloses a heavy-load unmanned aerial vehicle. The heavy-load unmanned aerial vehicle comprises a fuselage assembly and more than three arm assemblies, one end of each arm assembly is connected with the fuselage assembly, the other end of each arm assembly is provided with two coaxially arranged rotor components, each rotor component comprises a propeller and a motor, and the bottom part of the fuselage assembly is provided with a loading platform for loading articles. The heavy-load unmanned aerial vehicle has the advantages of large pulling force, capability of adjusting flight gravity center, good loading damping effect, good flight efficiency, high security and carriage convenience, and the heavy-load unmanned aerial vehicle can meet the heavy load demands.

The invention provides a high temperature resistant device for powder metallurgy damping experiment, which includes a high temperature vacuum furnace fixed on the base, the middle part of the high temperature vacuum furnace is used to fix the test piece; a cooling device is fixed above the high temperature vacuum furnace opposite to the test piece, Another cooling device is fixed at the position opposite to the test piece under the vacuum furnace; a switch assembly is fixed at the opening of the two cooling devices. One of the cooling devices is fixed with a vibration generating device, and the vibrating part of the vibration generating device contacts the test piece to drive the test piece to vibrate; the other cooling device is fixed with a data detection device inside, and the detection part of the data detection device detects the vibration response of the test piece; The invention completes the entire damping experiment process in a high-temperature vacuum furnace, avoids repeatedly opening windows to affect the experiment accuracy, and also uses a cooling device to reduce the temperature of the data detection device in a high-temperature environment to improve its detection accuracy.

The invention discloses a vertical continuous electroplating device which is used for carrying out vertical continuous electroplating or cleaning on a circuit board. The vertical continuous electroplating device comprises a driving wheel group, a driven wheel group, a first conveyor belt, a second conveyor belt, a conductive guide rail, a rack guide rail, a plurality of first conductive hangers, a second conductive hanger, flexible cables and a rack head, wherein the driving wheel group and the driven wheel group are in transmission connection through the first conveyor belt and the second conveyor belt; the first conductive hangers are electrically connected with the second conductive hanger through the flexible cables; the first conveyor belt and the second conveyor belt are driven, so that the first conductive hangers move along the conductive guide rail; the second conductive hanger moves along the rack guide rail; and the rack head is arranged at one end of the second conductive hanger, and is used for connecting a circuit board. According to the vertical continuous electroplating device, the conductive guide rail does not vibrate when the circuit board vibrates through two separate guide rails of the conductive guide rail and the rack guide rail, so that the problems such as poor contact of the conductive guide rail are avoided; and the electroplating effect is improved.

The invention discloses a printing device for a three-dimensional biological structure. The printing device comprises an execution unit with a liquid supply system, and a control unit, wherein the liquid supply system comprises an air compressor, an air capacitor communicated with an air outlet of the air compressor, and a liquid storage tank; a liquid outlet of the liquid storage tank is communicated with a liquid inlet of a spray head; a liquid inlet of the liquid storage tank is communicated with an air outlet of the air capacitor; a pressure reducing valve is arranged on a pipeline between the liquid storage tank and the air capacitor; the opening degree of the pressure reducing valve can be adjusted, and thus liquid drops at a spray nozzle of the spray head are enabled to not drop off; the height of the liquid storage tank can be adjusted, and thus the lowest end of a liquid level at the spray nozzle of the spray head is leveled with the spray nozzle of the spray head. The printing device disclosed by the invention can be widely applied to forming of biological scaffolds with various shapes, can be used for printing vascular structures and has the advantages of high printing precision, simpleness in operation, low cost and the like. Due to the adoption of the design of a replaceable clamp, a replaceable working face and a replaceable Z-shaped mounting plate, the printing device can be used for printing biological structures with different sizes and different tissue materials.