232results about How to "Improve hydraulic efficiency" patented technology

A dishwasher includes a number of spray arms, a circulation pump with a pump housing, an impeller, a suction port, and a number of discharge ports on the pump housing. The discharge ports are associated with the spray arms. A water diverter is located on a delivery side of the pump and generates a flow leading from the suction port selectably to one or more of the discharge ports. The water diverter includes a blocking element having a number of diaphragm openings positionable to one or more outlet positions by a drive via a rotation of the blocking element in a circumferential direction.

There is provided a non-contact, passively suspended blood pump that includes (a) a housing; (b) a pump rotor within the housing, wherein the pump rotor has a first end and a second end, and an axis of rotation; (c) a first axial thrust bearing across a first axial gap, between the first end and the housing, that axially suspends the first end; (d) a second axial thrust bearing across a second axial gap, between the second end and the housing, that axially suspends the second end; (e) a first radial hydrodynamic bearing that radially suspends the first end; and (f) a second radial hydrodynamic bearing that radially suspends the second end. Determining pump differential pressure by monitoring rotor axial position allows automatic physiologic control.

The reversible hydraulic pressure converter (1) employing tubular valves includes a medium-pressure stage (44) consisting of a medium-pressure cylinder (2) and a double-acting medium-pressure piston (3) the position of which is sent to a control computer of the converter (19) by a piston position sensor (14), the cylinder (2) and the piston (3) forming two medium-pressure chambers (5) that can be placed in communication with a medium-pressure inlet-outlet circuit (15) by at least one tubular valve (12), the converter (1) also including two high-pressure cylinders (9) each cooperating with a high-pressure piston (8) of smaller diameter and defining two high-pressure chambers (11) that can be placed in communication with a high-pressure inlet-outlet circuit (16) by at least one tubular valve (12), each of the various tubular valves (12) cooperating with an independent valve actuator (13).

A subsea rotary gas separator system has a separator located adjacent the discharge of the pump for separating gas from the high pressure liquid stream exiting the pump. Some of the high pressure liquid is recycled back to the inlet of the pump to maintain a liquid-rich inlet stream for the pump.

Blood pumps for ventricular assist devices employ a hollow rotor to impel blood through the blood pump. A blood pump includes a housing having a housing inlet, a housing outlet, and a housing blood flow channel through which the housing inlet and the housing outlet are in fluid communication. A motor stator is disposed around the housing blood flow channel and operable to generate a rotating magnetic field. A hollow rotor is disposed within the housing blood flow channel and rotated via the rotating magnetic field. The hollow rotor has a rotor circumferential wall enclosing a rotor blood flow channel. The hollow rotor has at least one rotor blade extending inwardly from the rotor circumferential wall. The at least one rotor blade is configured to impel blood through the rotor blood flow channel when the hollow rotor is rotated via the rotating magnetic field.

A pump impeller for a centrifugal pump The impeller is defined by a shroud rotatable about an axis of rotation At least two pump vanes extend axially from the shroud, each of the vanes configured as a blunted tear drop shape and having an inside wall and an outside wall, the leading edges of which are interconnected by a blunt wall The trailing edges of the inside and outside walls merge together A substantially constant width flow channel is defined between the blunted wall of one vane and a confronting surface defined by an inside wall of the other vane The vanes are tapered in the axial directions by inclining the inside wall of each vane radially outwardly.

The invention discloses a hydraulic design method for a double-blade non-block centrifugal impeller. The double-blade non-block centrifugal impeller structurally comprises a front cover plate, blades and a rear cover plate. The hydraulic design method comprises the steps that (1) the main hydraulic geometrical parameters of the double-blade non-block centrifugal impeller are worked out based on a velocity coefficient method; (2) the shapes of the axial surfaces of the blades are controlled based on a quadratic Bezier curve control algorithm; (3) the molded line installation angles of the blades are controlled based on a quartic Bezier curve control algorithm; (4) optimization design is conducted on the double-blade non-block centrifugal impeller based on a non-dominated sorting genetic algorithm (NSGA) II; and (5) the double-blade non-block centrifugal impeller according with the given flow, the given lift, the given pump efficiency and the given rotating speed value is manufactured by using the data obtained in the step (1) to step (4) as the dimension parameters of the double-blade non-block centrifugal impeller. By the adoption of the double-blade non-block centrifugal impeller designed through the method, the flow capacity and the anti-twining capacity of the impeller can be improved, the internal flowing condition of the impeller is improved, and the operating stability and the hydraulic efficiency of the impeller are improved.

The invention discloses an aviation centrifugal pump blade profile optimization design method. Under a Matlab platform, a five-point four-time bezier curve and a linear function are adopted to controlthe blade profile circumference angle distribution and the product superposition change rule, and internal flow field numerical simulation is carried out on 15 sets of design results through a software UG and Fluent combined batch processing method. On the basis of obtaining a calculation space boundary condition through curved surface interpolation, numerical solution is carried out on the dual-harmonic partial differential equation by adopting a central difference format, and a hypercurved surface performance agent model is sestaboished. Global optimization is carried out on the design variable based on an artificial fish swarm algorithm by taking the highest efficiency as an objective function. The result shows that the hypersurface agent model based on the double harmonic equation canensure that the test value and the predicted value are completely consistent, the wake effect in the optimized centrifugal impeller flow is obviously weakened, and the hydraulic efficiency is improved by 5.4% compared with that of a prototype pump.

The invention belongs to the technical field of a self-priming pump, and particularly relates to an outer ring type efficient start system for the self-priming pump and a start method thereof. The outer ring type efficient start system comprises a main pump which is communicated with a water pool, a pump inlet adjusting valve, a pump outlet adjusting valve, a gas-liquid separation device, a first pressure detecting device, a second pressure detecting device and a third pressure detecting device. All the parts of the invention form a vacuum adjusting system together. The vacuum adjusting system is used to facilitate circular flow of liquid in a circular pipeline outside the pump and enable a water inlet pipeline of the main pump to be in a vacuum state so that gas and liquid can be absorbed into the main pump, the gas absorbed into the main pump is exhausted in the gas-liquid separation device, and eventually the main pump achieves self-priming to complete start process. The outer ring type efficient start system for the self-priming pump and the start method thereof are simple in structure, quick in start, simple in main pump flow channel and convenient to process, flowability of the flow channel is greatly improved, the main pump needs no other auxiliary systems so that loss inside the pump is avoided, and accordingly operation efficiency of the main pump is greatly improved.

A sliding vane, positive displacement pump is provided which includes a dual mechanical seal that protects against leakage from a pump chamber while also reducing slip across rotor end faces. The dual mechanical seal may be formed as a cartridge seal that is readily demountable from the pump for replacement and service, and is retrofittable to existing pumps to improve the performance thereof. The pump may integrally include a dual mechanical seal, or the mechanical seal assembly may be provided for use by itself or in combination with a replaceable head ring that can be installed on existing pumps for repair thereof or for a retrofit upgrade of such existing pump.

The present invention relates to a double-suction microminiature paddle pump. It is characterized by that its pump paddle wheel and motor rotor are formed into one body, the centre of said motor rotor is equipped with two paddle wheel inlets which are respectively communicated with pump paddle wheel, the cross-sectional area of said two inlets is progressively expanded along flowing direction; said two paddle wheel inlets ar respectively communicated with two suction inlets of pump. Said pump has no need of mechanical drive shaft, and can implement high-effective and safety conveyance.

The present invention discloses a BJL multichannel modified line special-purpose air-conditioning energy-saving centrifugal pump. Said centrifugal pump includes the following several portions: motor, blade wheel, water-discharging chamber, water-entering chamber, straight taper tube flow channel, conical water-dividing cone, curved flow-guiding rib and flow deflector, etc. said invention can raise cavitation resistance of vertical centrifugal pump, and can raise hydraulic efficiency of pump and its volume efficiency.

The invention provides a turbine stator and rotor combination piece for linear projection blade and a turbine motor. The turbine stator and rotor combination piece comprises a stator and a rotor which are coaxially sleeved, wherein the stator comprises a stator body, a stator blade and a stator shroud; the rotor comprises a rotor body, a rotor blade and a rotor shroud; the inner wall of the stator shroud and the outer wall of the rotor body are coaxially sleeved; points on an outer outline line of the stator blade and an intersection line of the corresponding equivalent meridian plane form a first intersecting line; the first intersecting line is vertically intersected with a first projection straight line passing through the inside of the stator shroud; points on the outer outline line of the rotor blade and an intersection line of the corresponding equivalent meridian plane form a second intersecting line; the second intersecting line is vertically intersected with a second projection straight line passing through the inside of the rotor shroud. The turbine stator and rotor combination piece provided by the invention has the advantages of high hydraulic efficiency. The turbine motor provided by the invention has the advantages of simple structure and large torque, and is applicable to drilling boreholes with various sizes.

The invention discloses a sectional type multi-stage centrifugal pump equipped with adjustable guide vane devices. The sectional type multi-stage centrifugal pump comprises a suction section, a primary impeller, the adjustable guide vane devices, a middle section, secondary impellers, a discharge section, a pump shaft, a shaft sleeve, impeller spacer rings, a sliding bearing, a rolling bearing, a flexible connector and an external prime mover, wherein the impellers are connected and assembled on the pump shaft through keys; the adjustable guide vane devices are assembled in the middle section; the adjustable guide vane devices collect liquids pressurized by the impellers and reduce the flow velocity, and the liquids are discharged from the discharge section and sent into a pipeline system. According to the adjustable guide vane devices, the angles of guide vanes can be adjusted according to the pressure at a water pump outlet, so that the water pump operates at an efficiency optimized working point under any working condition, the hydraulic efficiency of the water pump under the working condition of part load or overload is improved, the operation efficiency of a water pump system, especially a variable-frequency or variable-flow water pump system, is improved, and the energy consumption of the water pump system is saved.

The invention relates to an automatic control type efficient self sucking pump. The automatic control type efficient self sucking pump comprises a pump body, a motor, an automatic exhausting and vacuumizing device and an intelligent control box; a liquid inlet is formed in the bottom of the pump body and is connected to an inlet elbow, a liquid outlet is formed in the side surface of the pump body and is connected to an automatic blowoff valve, an outlet stand pipe is arranged on the top of a valve body of the automatic blowoff valve, and the bottom of the valve body of the automatic blowoff valve is connected to a return pipeline through a return valve; a rotation shaft of the motor is connected to a pump shaft through a coupling, a pump cover is arranged between the pump body and the motor, a cavity formed by the pump body and the pump cover is a pump cavity, and an impeller is arranged inside the pump cavity; the pump cover is provided with an inductive probe and a vacuumizing and exhausting hole, an exhausting pipeline is installed on the vacuumizing and exhausting hole, the automatic exhausting and vacuumizing device communicates with the pump cavity through the exhausting pipeline, and the motor, the inductive probe and the automatic exhausting and vacuumizing device are electrically connected to the intelligent control box through signal cables. The automatic control type efficient self sucking pump is simple and compact in structure, the self sucking function is realized by the automatic exhausting and vacuumizing device, and the hydraulic efficiency is high.

The invention relates to a hydraulic design method for an efficient and large-flow vortex pump quasi-annulus pumping chamber. Design formulas of a volute base diameter, a gap between an annular retraction cavity and an impeller, a pumping chamber wrap angle, a separation tongue helix angle, a diffusing pipe diffusion angle and a diffusing pipe height are provided. The vortex pump pumping chamber designed through the design method can well guarantee that a vortex pump is not blocked, the flowing condition inside the pump is improved under the condition that the hydraulic loss is small, the passing ability of the vortex pump pumping chamber for liquid containing impurities is improved, and the hydraulic efficiency of the vortex pump is improved.

The invention discloses a multistage deep sea mixture pump with an axial force transmission structure. The pump comprises a pump case. Two ends of the pump case are fixedly provided with an inlet pumpcover and an outlet pump cover. The other end of the outlet pump cover is fixedly connected with an outlet connecting pipe. The outlet pump cover is coaxially provided with an outlet bearing pedestal. The other end of the inlet pump cover is fixedly connected with an inlet connecting pipe, a bearing box, and a motor. The inlet pump cover is coaxially provided with an inlet bearing pedestal. The bearing box is internally provided with a bearing box shaft. One end of the bearing box, far away from a motor, extends into the inlet connecting pipe. The pump case is internally provided with a pumpshaft. One end of the pump shaft extends into the inlet connecting pipe and is connected with the bearing box by a shaft, and the other end of the pump shaft is in the outlet bearing pedestal. A plurality of stages of static pressure expanders are uniformly sleeved on the pump shaft along an axial direction in sequence. Ends of the pressure expanders, close to the inlet pump cover, are provided with closed impellers which are fixedly coupled with the pump shaft in a cooperated manner. A thrust collar is arranged between a first stage impeller and the inlet bearing pedestal. The pump is high inoperation efficiency under a working condition of high gas content, and the pump is easy to process and install.