22results about How to "Improve hydraulic efficiency" patented technology

The intelligent spraying irrigation system comprises a movable trolley (1), a water storage tank (2), a variable frequency water pump (3), a water inlet electromagnetic valve (4), a first electromagnetic valve (5), a second electromagnetic valve (6), a liquid level sensor (7), a liquid storage tank (8), a third electromagnetic valve (9), a first quick coupler (10), a first pressure sensor (11), a flow sensor (12), a tree-shaped spraying device and a control system. The tree-shaped spraying device comprises a movable plate trailer (13), a main pipeline (14), a spray head (15), a second quick coupler (16), a fourth electromagnetic valve (17), a second pressure sensor (18) and a storage battery (19). Uniform, intelligent and automatic spraying irrigation of edible mushrooms on the multi-layer cultivation bed frame is achieved, the spraying irrigation precision is high, and the spraying irrigation efficiency is high; the stability of output pressure and flow of the water pump can be improved, the anti-cavitation performance of the water pump can be improved, the operation stability of the water pump can be improved, and the service life of the water pump can be prolonged.

The utility model discloses a sludge stirrer impeller for sewage treatment. The sludge stirrer impeller comprises a sludge stirrer impeller body, the water inlet end of the sludge stirrer impeller body is in a first arc shape; the outer lead angle of the sludge stirrer impeller body is arc-shaped; and the water outlet end of the sludge stirrer impeller body is in a second arc shape. The operation performance and the operation efficiency of the stirrer are improved, the requirements of a sewage treatment process flow are met, the water quality is stabilized, the operation efficiency is improved, and powerful support is provided.

The invention discloses a vertical multistage centrifugal pump with a fully open flow channel, comprising a motor, an inlet and outlet water housing and a cylinder connected in sequence, a flow channel housing being arranged in the cylinder, the flow channel housing comprising an extrusion section, a middle section and a suction section connected in sequence, a guide impeller being arranged in the flow channel housing, the motor being connected to the cylinder through the inlet and outlet water housing, the inlet and outlet water housing being connected to the extrusion section, the middle section, the suction section and the guide impeller through a pipe; the guide impeller is composed of several stages of impellers connected in sequence from top to bottom, the bottom impeller being located in the suction section, each stage of the impeller comprising a hub and blades covering the hub, the outer edge positions of the inlet and outlet of the blades being connected with a water inlet ring and a water outlet ring; a flange connection surface is arranged at the maximum outer diameter position of the guide impeller, and the connection surface between the extrusion section, the middle section and the suction section is a flange connection stop fitting surface. The invention solves the defects in the traditional vertical multistage centrifugal pump, improves the manufacturing accuracy and hydraulic performance of the centrifugal pump, and is convenient for installation and maintenance.

The invention discloses a design method of a two-stage low-temperature deep-well pump. The two-stage low-temperature deep-well pump comprises an inducer, a first-stage impeller, a space guide vane, a second-stage impeller and a radial guide vane which are arranged on a rotating shaft from front to back. The inducer comprises a hub connected with the rotating shaft and inducer blades connected with the hub, the space guide blades are divided into a plurality of flow channels through the blades of the space guide blades, and the radial guide blades only comprise positive blades; the design method comprises the following steps that S1, the inducer is designed; s2, designing a first-stage impeller and a second-stage impeller; s3, designing the space guide vane; and S4, the radial guide blade is designed. The method can be used for designing the high-efficiency two-stage LNG low-temperature deep-well pump, the cavitation resistance can be guaranteed by improving the shape and size parameters of the inducer, the matched first-stage impeller is designed with the size parameters of the inducer as the standard, then the space guide vane, the second-stage impeller and the radial guide vane are designed, and the hydraulic efficiency of the designed product is high.

The invention provides an experimental method for measuring particle size distribution of particulate matter and a wet screening instrument.The wet screening instrument comprises a centrifugal screening barrel and a rotating mechanism, the centrifugal screening barrel comprises a barrel body, a screen assembly and a washing assembly are arranged in the barrel body, the screen assembly comprises a plurality of screen components which are arranged in a nested mode, and the washing assembly is connected with the rotating mechanism. A plurality of screen holes are formed in the side wall of the screen component; the screen mesh apertures of the screen mesh components are sequentially reduced from the middle part of the screen mesh assembly to the outside; an annular channel used for receiving accumulated materials on the screen is formed between every two adjacent screen components. The flushing assembly is located on the outer side of each screen component, and a water spraying opening of the flushing assembly faces the outer side wall of the screen component; the rotating mechanism is connected with the screen assembly and drives the screen assembly to rotate. The rotating mechanism is fixedly connected with the screen assembly, and a water outlet is formed in the bottom of the barrel body. By adopting the technical scheme of the invention, accurate and efficient measurement of particle size distribution of particles is realized, and the experiment precision and the experiment efficiency are improved.

The invention relates to the technical field of hydraulic pumps, and discloses a ship emergency manual hydraulic pump and a using method thereof.The ship emergency manual hydraulic pump comprises two sets of hydraulic pump bodies, the hydraulic pump bodies on the left side and the right side are arranged in a mirror image mode, the hydraulic pump body on the right side comprises a pump body, and a first one-way valve is connected to the rear side of the right end of the pump body; the front side of the right end of the pump body is connected with a second one-way valve, the rear side of the left end of the pump body is connected with a third one-way valve, the front side of the left end of the pump body is connected with a fourth one-way valve, the pump body is connected with a liquid inlet pipe through the first one-way valve and the second one-way valve, and the pump body is connected with a liquid outlet pipe through the third one-way valve and the fourth one-way valve. According to the scheme, the first U-shaped frame, the first rotating pipe, the first connecting rod and the first connecting plate are arranged and matched to drive the inserting rod to move front and back, the traditional mode that hydraulic work is conducted by moving a swing arm is changed, and then the labor amount of workers is reduced.

The invention discloses an impact-resistant large ceramic impeller and a machining method thereof.The impact-resistant large ceramic impeller comprises a hub and an impeller body arranged on the hub; the impeller body is provided with a plurality of groups of outer lining plates on the radial outer side of the front cover plate or / and the rear cover plate of the impeller; the splicing position of every two adjacent sets of outer lining plates is arranged at the combination position of the blades and the front cover plate or the rear cover plate, and the two sides of each set of outer lining plates are arranged at the combination position of the blades and the front cover plate or the rear cover plate. A connecting part which is made of a silicon carbide material and is used for combining the outer lining plate into a whole is arranged between the blades and the inner side part of the front cover plate or / and the rear cover plate. The large ceramic impeller is better in structural performance and lower in production cost.

The present invention discloses a flow channel assembly for a membrane element, the flow channel assembly comprises: a flow channel element, the flow channel element is concaved inwards to form a plurality of concave structures and is convex outwards to form a plurality of convex structures, and the plurality of concave structures and the plurality of convex structures are distributed in a staggered manner; the flow channel element comprises a water inlet section, a transition section and a water outlet section in the first direction, and the density of the multiple concave structures and the density of the multiple convex structures are gradually increased in sequence along the water inlet section, the transition section and the water outlet section. Through the gradient design that the density of the concave-convex structures of the water inlet section, the transition section and the water outlet section is gradually increased, water flow resistance at the water inlet end is reduced, pressure loss is reduced, and it is guaranteed that water flow enters rapidly and stably; the transition section realizes stable transition of water flow from a low-resistance state to a high-turbulence state and prevents the water flow from impacting the surface of the membrane; the high-density concave-convex structure at the water outlet end generates strong turbulence to effectively scour a concentration polarization layer on the surface of the membrane, low resistance and high turbulence are both considered, the scale deposition risk is reduced, and the service life of the membrane element is prolonged.

The invention discloses an electronic water pump, a heat management system and a vehicle. The electronic water pump comprises a pump shell provided with a liquid inlet and a liquid outlet, the inner wall face of the pump shell comprises a matching circumferential face and an annular sealing face connected with one axial end of the matching circumferential face, and the matching circumferential face extends in the circumferential direction of the liquid inlet; a liquid inlet cylinder section is arranged at one axial end of the impeller assembly, and at least part of the liquid inlet cylinder section is located in an area defined by the matching circumferential face; the floating opening ring is arranged between the matching circumferential surface and the outer circumferential surface of the liquid inlet cylinder section, the floating opening ring can axially float so as to abut against the annular sealing surface for sealing when the impeller assembly rotates, the inner diameter of the matching circumferential surface is M, the outer diameter of the liquid inlet cylinder section is N, the outer diameter of the floating opening ring is P, the inner diameter of the floating opening ring is L, and M-P is larger than L-N. According to the electronic water pump, the hydraulic efficiency is obviously improved, the required motor efficiency is lower, the size and weight of the motor are reduced, light weight is achieved, the cost is reduced, and the floating opening ring is simple in structure, small in part number and easy to assemble.

A vertical long-shaft draining pump structure belongs to the technical field of industrial vertical pumps. The centrifugal pump comprises a base seat, a discharge connecting pipe, an external connecting pipe, a main shaft, a guide vane body, a pump impeller and a flared pipe assembly, the flared pipe assembly comprises a flange, an outer circular flared pipe and an inner circular flared pipe, the flange, the outer circular flared pipe and the inner circular flared pipe are fixedly connected into a whole, the flange is connected with the guide vane body, and the outer circular flared pipe is connected with the main shaft. The outer circular flared pipe serves as an impeller chamber, and the pump impeller is located in the outer circular flared pipe. Maintenance and leakage points can be reduced, flow resistance of an overflowing portion is small, hydraulic efficiency is high, cost is saved, and benefits are remarkable.

The application relates to the technical field of centrifugal pumps, in particular to an energy-saving high-temperature-resistant centrifugal pump capable of conveying crystallized materials, which comprises a motor, a support and a pump body, and further comprises an inner rotor assembly, an outer rotor assembly, a jacket assembly and a flow guiding part; the inner rotor assembly is connected with the pump body and is used for driving the pump body to convey liquid; the outer rotor assembly is connected with the motor and transmits mechanical energy of the motor to the inner rotor assembly through magnetic coupling. The flow guiding part driven by medium pressure is arranged, automatic switching of two working conditions is cleverly realized. When medium flows in the pump, the static pressure of the medium makes the flow resistance assembly open, the medium itself is allowed to flow through the bearing cavity for flushing and lubrication, meanwhile, the flushing liquid passage of the jacket assembly is closed, so that pollution of external flushing liquid to the conveying medium is avoided. When there is no medium in the pump, the medium channel is automatically closed and the flushing liquid passage of the jacket assembly is opened, external flushing liquid is used for flushing, cooling and anti-crystallization protection of the bearing.

The utility model discloses a workpiece loosening prevention hydraulic machine for automobile part die production, which comprises a hydraulic machine body, a fixing plate, a supporting plate, a driving component, a supporting column, a clamping plate and a clamping component, a hydraulic plate and a hydraulic table are mounted on the hydraulic machine body, a groove is formed in the hydraulic table, and an anti-skid pad is arranged in the groove. The two fixing plates are symmetrically and detachably connected to the top end of the hydraulic table, each fixing plate is symmetrically connected with two fixing blocks, fixing screws are in threaded connection between the fixing blocks and the hydraulic table, the supporting plates are movably arranged on the upper sides of the fixing plates, the supporting plates are rotationally arranged on the upper side of the hydraulic table, and the driving assemblies are installed on the fixing plates. The two supporting columns are symmetrically connected to the top end of each supporting plate, and the clamping plate is movably arranged on one side of each supporting column. According to the hydraulic machine capable of preventing the workpiece from loosening and used for producing the automobile accessory die, the deformation condition of the clamping plate and the loosening condition of the die workpiece are reduced conveniently.

The present invention discloses a dual-cavity structure of an integrated heating pump for household appliances. The dual-cavity structure includes a heating chamber and a boosting chamber for the integrated heating pump, respectively, which avoids heating and pressurizing in the same pump chamber at the same time, thereby compressing the volume of the boosting chamber to a greater extent and improving the hydraulic efficiency of the integrated heating pump. The dual-cavity structure of an integrated heating pump for household appliances described in the present invention is designed with a dual-cavity structure, a partition and an opening are arranged in the middle of the dual-cavity, and an opening is arranged on the outer surface of one side of the partition to communicate with a water guide groove for the heating chamber, and the opening communicates with the boosting chamber on the other side. A stainless steel heating tube is used as a heating element in the heating chamber, and the heating tube is immersed in the heated liquid to directly heat the liquid, thereby maximizing the heating efficiency. The heating tube has a built-in fuse, which makes it easy to install and safe and reliable. An impeller is used as a centrifugal pressurizing power in the boosting chamber of the integrated heating pump.

The invention provides a wing plate structure for inhibiting secondary flow in a pump guide vane body and a hydraulic mechanical device, and belongs to the technical field of fluid machinery. Comprising a main shaft, an impeller, a guide vane body and a wing plate, the wing plate is fixedly arranged in a runner between adjacent vanes of the guide vane body and obliquely arranged in the main flow direction, and the two ends of the wing plate are fixedly connected with the inner wall of the guide vane. Key geometric parameters such as the radial position, the circumferential deflection angle, the axial position, the wing type wrap angle, the inlet and outlet angle and the thickness of the wing plate are limited in a specific numerical value range, so that the wing plate forms a secondary flow guide face in a guide vane flow channel, fluid is guided to flow close to the wall, and transverse secondary flow and flow separation of a hub area is effectively weakened. The structure is simple and compact, flow field distribution in the guide vane can be remarkably improved, hydraulic loss is reduced, the hydraulic efficiency of the pump is improved, and the guide vane is suitable for a mixed-flow pump, an axial-flow pump and various fluid machines containing the guide vane.

The invention relates to a bucket (2) of a Pelton turbine, the bucket (2) having an outlet edge (6) curved at least in sections. According to the invention, in order to achieve particularly high efficiency, the outlet edge (6) forms, in a side view, a rear projection (7), the center of curvature of which lies below the outlet edge (6) in the side view, and the apex (10) of which is closer to the cup base (3) than to the bucket front (4).

The utility model discloses a novel balance disc multistage pump body which comprises a main shaft and a pump body outer shell body, the pump body outer shell body is arranged outside the main shaft, a final-stage impeller, a novel balance disc and a tail cover are sequentially installed outside the main shaft in the axial direction, the final-stage impeller and the novel balance disc are arranged between the main shaft and the pump body outer shell body, and the tail cover is arranged on the main shaft. The tail cover is installed on one side of the pump body outer shell, a guide vane chamber is formed in the side, away from the tail cover, of the pump body outer shell, a middle section shell installation straight opening is formed in the outer portion of the side, away from the tail cover, of the pump body outer shell, a pump body flow channel outlet is formed in the outer portion of the pump body outer shell, and a pump body water outlet flange is installed at the end of the pump body flow channel outlet. A pull rod cover is installed outside the pump body outer shell, and a shaft seal chamber is arranged between the tail cover and the main shaft. The structure of the pump body is redesigned, a last-stage guide vane in a traditional multi-stage pump is omitted, the last-stage impeller is directly installed on the pump body, the structure is simplified, and manufacturing cost and maintenance complexity are reduced.

The invention discloses a flow guide structure for a baffling type disinfection tank and a design method thereof, the flow guide structure comprises baffles and flow guide plates arranged in the disinfection tank, the starting ends of the baffles are connected with the inner wall of the disinfection tank, flow channels exist between the open ends of the baffles and the inner wall of the disinfection tank, the multiple baffles are alternately arranged in the disinfection tank in parallel, and the flow guide plates are arranged in the disinfection tank. The guide plate is arranged at the open end of the baffle plate, and gaps exist between the guide plate and the open end of the baffle plate and between the guide plate and the inner wall of the disinfection tank, and the guide plate is used for guiding fluid flowing to the open end of the baffle plate. The inlet of each reaction chamber is divided into a left part and a right part through the guide plate, so that the influence of right-side high-speed fluid on left-side fluid flowing is weakened, meanwhile, the right-side high-speed fluid of each reaction chamber can be guided to flow through the guide plate, the flowing direction of the fluid is optimized, and the flowing speed of the left-side fluid of each reaction chamber is increased; therefore, the area of a backflow low-speed area is reduced, the strength of adherent flow is weakened, and the velocity distribution uniformity of fluid in the reaction chamber is optimized.

The utility model discloses an electronic water pump, heat management system and vehicle. Electronic water pump includes: pump shell is equipped with liquid inlet and liquid outlet, and the inner wall surface of pump shell includes cooperation circumference surface and the annular sealing surface that is connected with the axial one end of cooperation circumference surface, and cooperation circumference surface extends along the periphery of liquid inlet, impeller subassembly, axial one end is equipped with liquid inlet cylinder section, and liquid inlet cylinder section is at least partially located in the region surrounded by cooperation circumference surface, and the outer periphery between cooperation circumference surface and liquid inlet cylinder section is equipped with floating mouth ring, and floating mouth ring can axially float to abut and seal with annular sealing surface under the state that impeller subassembly rotates, and the inner diameter of cooperation circumference surface is M, and the outer diameter of liquid inlet cylinder section is N, and the outer diameter of floating mouth ring is P and the inner diameter is L, and M-P is greater than L-N. The hydraulic efficiency of the electronic water pump according to the utility model embodiment is improved obviously, and the required motor efficiency is lower to reduce the volume and weight of motor, realizes light weight and reduces cost, and the floating mouth ring structure is simple, and the part quantity is few and easy to assemble.

The application provides a hydraulic turbine large shaft adaptive air supplement control system based on dynamic pressure feedback, and relates to the technical field of hydraulic turbine unit operation control. The pressure monitoring module is arranged at a position close to the runner blade outlet in the hydraulic turbine large shaft, is used for collecting dynamic pressure data in the hydraulic turbine, and transmits the dynamic pressure data to the air supplement control unit in real time. The air supplement control unit is used for analyzing and processing the dynamic pressure data in real time to obtain a target air supplement amount. The air supplement execution module is used for supplementing air to the hydraulic turbine large shaft based on the control signal of the air supplement control unit. Real-time monitoring of dynamic pressure and adaptive adjustment of air supplement amount can effectively inhibit pressure pulsation in the hydraulic turbine, reduce unit vibration caused by unstable pressure, and prolong the service life of the hydraulic turbine and components. According to actual working conditions, air is accurately supplemented, the flow state in the hydraulic turbine is more reasonable, energy loss is reduced, and the power generation efficiency of the hydraulic turbine is improved.

The application discloses a low-temperature liquid ammonia pump inducer assembly, which comprises an inducer, a sleeve and a bearing seat sleeved on the inducer, the inducer is fixed with the sleeve, the bearing seat is fixed on a pump shell, and the bearing seat and the sleeve form a sliding friction pair; a threaded groove and an annular collecting groove are arranged on the outer circle of the sleeve, the front end of the threaded groove is communicated with the annular collecting groove, the rear end of the threaded groove is arranged to the rear end surface of the sleeve, and the rotating direction of the threaded groove is opposite to the working rotating direction of the inducer; the outer circle of the bearing seat is uniformly distributed with backflow holes, the backflow holes penetrate through the bearing seat and are located at the front end of the inducer, the outer circle of the bearing seat is provided with a backflow groove, the front end of the backflow groove is communicated with the corresponding backflow hole, and the rear end of the backflow groove is arranged to the rear end surface of the bearing seat. The application has the characteristics of compact structure, high reliability, high cavitation resistance, support function and dynamic sealing effect, improved cavitation resistance, improved hydraulic efficiency of the pump, enhanced operation stability and prolonged service life.

The invention provides a vortex pump with a grinding function, which comprises a pump shell and a semi-open impeller, the rotatable semi-open impeller is mounted in the pump shell, a movable grinding unit is arranged at an outlet of the semi-open impeller, a static grinding unit is supported in the pump shell, one end of the static grinding unit extends to the middle of the movable grinding unit, and the other end of the static grinding unit extends to the middle of the movable grinding unit. The method is used for forming at least two cutting layers. According to the invention, solid particles in a conveyed solid-liquid two-phase medium can be ground; the impeller does not need to be arranged at the rear, and a bladeless cavity in front of the impeller effectively plays a role in draining a high-speed medium, so that solid particles can smoothly flow out along a grinding part on the periphery of an outlet of the impeller, and liquid-phase media with different viscosities can be conveyed and fully stirred and mixed.

The present invention discloses a double-suction fully symmetrical multistage pump, comprising a secondary impeller, a double-suction impeller and a double-suction pump body. The double-suction pump body is arranged outside the double-suction impeller, and the double-suction impeller is a completely symmetrical structure. The double-suction pump body is located on the coaxial line of the double-suction impeller, thereby providing a double-suction fully symmetrical multistage pump, thereby realizing a multi-stage double-suction pump is conveniently formed on the premise of making maximum use of existing single-suction multistage pump parts, thereby multiplying the flow rate of the pump and expanding the performance range of the pump; since the first-stage impeller, the secondary impeller and the double-suction impeller are completely symmetrically arranged, the axial force is completely balanced, and the theoretical axial force is zero; the flow area of ​​the first-stage impeller is larger than that of the secondary impeller, thereby improving the cavitation performance of the pump; the use of the double-suction impeller and the double-suction pump body is convenient for liquid collection and convergence, thereby improving the hydraulic efficiency of the pump; the double-axle extension scheme is adopted, and it can be driven from either end, thereby meeting the diverse requirements of pump installation.