9results about How to "Improve flow characteristics" patented technology

This utility model relates to the field of heat exchange equipment technology, and in particular to a heat exchanger anti-impact structure. The support consists of a support sleeve and a support plate: the support sleeve is circular and tubular; one end of the support plate is fixed to the outer wall of the support sleeve, and the other end is fixed to the inner wall of the heat exchanger; one end of the support rod is provided with a guide cone; the support rod is inserted into the support sleeve; the first guide plate is disc-shaped, fitted onto the support rod, and located on the other side of the support sleeve; the top of the first guide plate is a guide surface one, on which there is a guide hole one parallel to the axis and a guide hole two extending outwards to the bottom; the second guide plate is disc-shaped, fitted onto the support rod, the top of which is a guide surface two, on which there is a guide hole four parallel to its own axis and located on the outer side, and a guide hole three extending inwards from the top to the bottom. This utility model can disperse the impact force of the fluid, protect the heat exchanger tube bundle, and simultaneously ensure uniform fluid distribution and good flow characteristics.

The invention discloses a parameterization optimization method of a mixed-flow water turbine blade and a water turbine, and relates to the technical field of water turbine optimizing.According to the parameterization optimization method, a three-dimensional parameterization model based on initial geometric parameters is constructed, multiple rounds of iteration orthogonal optimization are carried out with design parameters as variables, a search space is dynamically shrunk after each round of optimization, and therefore the optimization efficiency of the mixed-flow water turbine blade is improved. The optimization efficiency and the convergence stability are greatly improved; the problem that a traditional global optimization algorithm is high in calculation cost is avoided, meanwhile, the problem that single-round optimization is prone to falling into local optimum is solved, complex and mutually coupled parameters can be efficiently explored within the limited number of simulation times, and the simulation efficiency is improved. And a closed-loop optimization path which is high in systematicness and can be really applied to engineering is provided for improving the performance of the existing water turbine.

The invention relates to a sludge concentration tank, a sludge concentration system and an application method.The sludge concentration tank comprises a tank body (1), the interior of the tank body is composed of a gas collecting area (4), a settling area (5) and a sludge storage area (6) from top to bottom, the gas collecting area is provided with a gas outlet (7), the side wall of the settling area is provided with a sludge feeding pipe (8), and the upper portion of the settling area is provided with a liquid discharging pipe (12); a sludge discharge pipe (9) is arranged at the bottom of the sludge storage area; the rotational flow inner part (2) is arranged in the settling area, the rotational flow inner part is a cylinder with the pipe diameter reduced from top to bottom, an opening in the bottom of the rotational flow inner part is a mud outlet, the top of the rotational flow inner part is closed, a clear liquid outlet (16) is formed in the rotational flow inner part, and a feeding opening is formed in the side wall of the rotational flow inner part and communicated with the sludge feeding pipe. The sludge concentration tank and the sludge concentration system can realize efficient separation of sludge and water, and the subsequent sludge treatment energy consumption is reduced; meanwhile, gas is collected, and the deodorization effect is achieved. The working efficiency and the separation efficiency are relatively high.

The utility model relates to the technical field of air compressors, in particular to an auxiliary preheating micro-oil screw air compressor which comprises an air compressor body, an air inlet channel and a preheating assembly, the air inlet channel used for air inlet is arranged in the middle of the air compressor body, and the preheating assembly is installed on the outer wall of the air inlet channel. The preheating assembly comprises an air blower used for providing airflow, a heating layer used for heating the airflow, an air inlet used for sucking in external airflow and an exhaust port used for exhausting the airflow to the air compressor body. The multiple air blowers are installed on the outer wall of the heating layer in an array mode, through the design of the flow guide layer and the configuration of the air blowers, flowing of airflow in the air inlet channel is optimized, efficient transfer of heat is ensured, and therefore the technical problems that an air compressor is difficult to start and unstable in work under the low-load and high-load working conditions are solved.

The invention provides a laser vibration cladding device and a method thereof.The device comprises an annular heating cover and an infrared focal plane detector which are arranged in a working cabin with a laser cladding head, and a plurality of independently-controlled infrared heating units evenly distributed in the circumferential direction of the annular heating cover are arranged on the annular heating cover; a workpiece clamping position is arranged below the circle center of the annular heating cover, and the infrared heating units all point to the workpiece clamping position. A multi-channel coaxial powder feeder is further arranged in the working cabin, a plurality of independently-controlled powder bins are integrated in the multi-channel coaxial powder feeder, a powder feeding pipe of the multi-channel coaxial powder feeder is integrated with the laser cladding head, and powder in all channels is converged before entering the powder feeding pipe and conveyed to the laser cladding head through inert gas flow; and an ultrasonic generator, a piezoelectric transducer and a vibration transmission rod are also arranged in the working cabin.

This utility model relates to a novel grinding disc-assisted grinding device for a sand mill, comprising a frame, a variable frequency motor fixedly installed inside the frame, a bearing seat fixedly installed above the frame, a drive shaft mounted on the bearing seat, the variable frequency motor and the drive shaft connected by a drive belt device, a grinding cylinder fixedly mounted on the bearing seat by grinding cylinder fixing bolts, and an end cap fixedly mounted on the other end of the grinding cylinder by end cap fixing bolts. The bearing seat, grinding cylinder and end cap form a sealed grinding chamber, in which a grinding disc, a conical spacer and a rotor are arranged. The conical spacer is a spacer with a tapered structure. The grinding disc and the conical spacer are mounted on the drive shaft, and the rotor is mounted at the farthest end of the drive shaft. The stirring device composed of the grinding disc, the conical spacer and the rotor rotates with the drive shaft. This utility model solves the problems of traditional cylindrical spacers not being able to fully utilize the grinding chamber space and having low grinding efficiency, and square spacers having high energy consumption and relatively insufficient uniform mixing ability.

A resin composition comprising resin components and inorganic particles, subjected to a shear rate of 10 s at 130°C. ‑1 Viscosity V measured below 10 Divide by the temperature at 130℃ and the shear rate at 1 second. ‑1 The value V is obtained by measuring the viscosity V1 at the time of measurement. 10 / V1 is 0.7 or higher.

The invention provides a resistance reduction and vibration suppression design method with marine organism bionic structures, an impeller and a blade, and the method comprises the following steps: S1, constructing a main body structure of the impeller and the blade, the main body structure comprises a suction surface e and a pressure surface f, and the suction surface e and the pressure surface f are each provided with a scale area g with a plurality of marine organism bionic structures; s2, a single marine organism bionic structure coupling element is constructed and designed, and the structure coupling element is defined by a rib groove space curved surface and three special-shaped planes intersecting with the rib groove space curved surface; and S3, establishing a plurality of marine organism bionic structure arrangement rules. Based on flow control of a marine organism bionic structure, the flow characteristic of fluid on the surface of the blade can be improved, vibration is restrained, and noise is reduced.

This invention discloses an impeller blade based on a caudal fin scale biomimetic structure and an impeller having the same. The impeller blade based on the caudal fin scale biomimetic structure includes a blade body with a leading edge and a trailing edge. The trailing edge has a widened section at the end away from the leading edge, the width of which gradually increases from the leading edge to the trailing edge. The trailing edge has multiple grooves arranged sequentially along its width direction to give the trailing edge a caudal fin scale biomimetic structure. The impeller blade based on the caudal fin scale biomimetic structure proposed in this invention can achieve flow control based on the biomimetic surface structure, improve the fluid flow characteristics at the trailing edge of the blade, promote a smooth transition of fluid at the trailing edge, reduce vortex shedding, and reduce flow resistance, effectively reducing noise during the operation of the impeller pump.