36results about How to "Increase the runner area" patented technology

The invention relates to the field of seawater desalination, in particular to a submersible self-priming filter head of a miniature desalination machine and a working method. The interior of the filter head shell includes the swirl shell, check valve A, downward sloping baffle, bracket, upward sloping baffle and check valve B from bottom to top; three-stage filtration is performed through 3 cavities from bottom to top, respectively relying on The cyclone separation in the first chamber and the inclined plate settlement principle in the second and third chambers improve the filtering capacity of the filter head and the dirt holding effect of multiple chambers; the support frame can move according to the negative pressure in the filter head It drives the sealing gasket to move up and down, which reduces the chance of clogging the filter head, increases the flow channel area, increases the gravity separation time, avoids the appearance of complex flow field and water flow "dead zone" in the tank, and effectively improves the separation of water and sewage efficiency. The main components in the filter head adopt a detachable structure. Even if there is a blockage, the filter head can be disassembled to quickly clean the internal parts to achieve the effect of quick maintenance.

The invention discloses a stability enhancement device for circumferential air blowing of a tail edge of an axial flow compressor. An air blower is mounted on a tail edge of a blade, and flow direction of jet stream is consistent with the rotation direction of a rotor; the air blower comprises a suction force surface and a pressure surface, and the pressure surface rotates anticlockwise by 1.48 degrees along the axial direction; the bottom of the air blower is mounted on a cartridge receiver at 10% of axial chord length of the downstream part of the tail edge of a blade top of the rotor, an air blower outlet is tangent to the surface of the cartridge receiver of the blade top of the rotor, the circumferential span of the air blower is 1.48 degrees, the axial distance of the air blower is 1.5mm, and an included angle between an air blower outlet and the circumferential direction is 0 degree; and an air blower inlet is communicated with an external air source, and the air blower is in threaded connection with the wall of the cartridge receiver. The air is circumferentially blown to the tail edge of the blade through the air blower, and the countercurrent flow of the tail edge of the blade is inhibited through high-speed fluid, so that the flow area of the axial flow compressor is increased; and a main stream can relatively smoothly flow to the downstream, so that the delayed stall is avoided, the stability margin of the axial flow compressor is increased, and the working efficiency of the axial flow compressor is improved.

The present invention makes it possible, in a torque converter, to increase the cross-sectional area of a flow path for hydraulic oil, and also to minimize the occurrence of hydraulic oil, having flowed out from an impeller, being drawn into the impeller. In the torque converter, an impeller core (13) has a first projecting part (132b) that projects axially out from the outlet-side edge (12a) of an impeller blade (12). A turbine core (17) has a second projecting part (172) that projects axially outward from the inlet-side edge (16a) of a turbine blade (16). The second projecting part (172) is positioned on the inner peripheral side of the first projecting part (132b) and extends at least to the distal end of the first projecting part (132b).

The invention discloses an active cooling double-spray pipe support plate ejection rocket for a rocket based combined cyclic engine. The active cooling double-spray pipe support plate ejection rocketfor the rocket based combined cyclic engine comprises a support plate ejection rocket body. The support plate ejection rocket body is a sold cuboid and used for longitudinal arrangement in a segregation segment of the engine. A vertical direction combustion chamber is formed in the side, close to a short edge, in the support plate ejection rocket body. Two longitudinal Rafael spray pipes are arranged on the side, close to the other short edge, of the combustion chamber in an up-down spaced manner and communicate with the combustion chamber. In the support plate ejection rocket body, communicating M type cooling channels are formed along one long edge of the support plate ejection rocket body and then surrounding the outer walls of one sides of the Rafael spray pipes and the outer wall of the combustion chamber by one circle in sequence, and then surrounding the outer walls of the other sides of the Rafael spray pipes and the other long edge of the support plate ejection rocket body insuccession. An outer side cooling channel and an inner side cooling channel are formed in the support plate ejection rocket body. Cooling requirements of the inner side wall surface and the outer sidewall surface of the support plate rocket can be met simultaneously, and long-time working of the support plate ejection rocket is achieved.

The invention discloses a proton exchange membrane fuel cell bipolar plate based on a labyrinth-baffle-plate-structured flow field. The proton exchange membrane fuel cell bipolar plate includes a rectangular gas flow field (1), the reaction gas inlet (11) and the reaction gas outlet (12) of which are located at two ends of one diagonal of the gas flow field (1) in diagonal distribution. A plurality of ridges (13) with the same height and a plurality of baffle plates (15) are distributed in the gas flow field (1). The gas flow field (1) is internally divided by the ridges (13) into to a plurality of flow channels (14) with the same width, and all the baffle plates (15) arranged along the other diagonal of the gas flow field (1) and the ridges (13) located on the diagonal form a flow channel dam along the diagonal. The labyrinth-baffle-plate-structured flow field allows forced convection and water discharge capacity of the reaction gas to be improved, the gas is made to be uniformly distributed, and the electrochemical reaction efficiency of the cell is increased. The electric current density becomes uniform, and the electrochemical performance of the whole fuel cell is improved.

The structure of the gate position of the injection molded part is characterized in that the gate position of the injection molded part is a convex structure that protrudes outward, and the diameter of the convex structure gradually increases from the top to the bottom, and the wall body transitions smoothly without corners The hollow tubular shape of the injection molded part is located on the top of the raised structure. The purpose of the present invention is to solve the problem of low strength at the gate position of injection molded parts, provide a structure for the gate position of injection molded parts, improve the structural strength of the gate position of injection molded parts, and ensure that the structure at the gate position of injection molded parts is in the process of loading It is not easy to be deformed and damaged, improves the reliability of the injection molded parts, prolongs the service life of the injection molded parts, and effectively improves the fluidity of the fluid material at the gate position, and improves the injection molding process performance of the injection molded parts. The invention also provides a structural design method for the gate position of the injection molded part.

The invention relates to a reverse osmosis membrane element, comprising a central pipe, a water inlet spacer, a reverse osmosis membrane and a pure water diversion cloth, the water inlet spacer, the reverse osmosis membrane and the pure water diversion cloth all have multiple layers, Wound on the central pipe, wherein the pure water diversion cloth communicates with the inner cavity of the central pipe; the water inlet flow channel and the water production flow channel are respectively formed between the two adjacent reverse osmosis membranes , the water inlet channel and the water production channel are arranged at intervals, the water inlet spacer is located in the water inlet channel, the pure water diversion cloth is located in the water production channel, and the pure water diversion cloth is a multi-support point structure. In the present invention, the pure water guide cloth has a multi-support point structure, which can effectively increase the pressure-bearing contact points of the reverse osmosis membrane element, improve the pressure resistance of the reverse osmosis membrane element, and increase the flow channel area of ​​pure water at the same time. It can effectively improve the water flux of the membrane element.

The invention provides a coal powder-prevention tubular discharging and extracting pump for pumping liquid in coal bed gas wells, which especially can prevent coal powder from burying pump, blocking the pump and extending the period of pump inspection. The coal powder-prevention tubular discharging and extracting pump comprises a pump cylinder assembly, a plunger assembly, a liquid inlet valve assembly and a fixing device. A hemispherical valve ball enlarges the flow area of a pump valve, improves the speed for well liquid to enter the pump, is beneficial to the discharging of well liquid outof the pump together with the coal powder to prevent the coal powder from blocking the pump; a resetting spring is matched with a positioning pin to reinforce the resetting capacity of the valve ballso that the tubular discharging and extracting pump reduces loss and realizes the purpose of smoothly opening the pump valve under low sinking degree; a coal powder-prevention slot can temporarily contain the coal powder to reduce the abrasion of the coal powder for plungers and pump cylinders; the bottom of the coal powder-prevention slot is provided with jetting holes so that the coal powder ina valve cover is washed by utilizing the well liquid stored in the slot, thereby the discharging and extracting pump realizes the function of self washing to prevent the blockage of the liquid inlet valve from blocking the pump; and a stirrer drives vanes to rotate along with the reciprocating motion of a plunger of the liquid inlet valve to constantly stir the well liquid and deposited coal powder in a sieve tube, thereby preventing coal powder particles from rapidly settling in the sieve tube to result in that the pump is buried by the coal powder.