159 results about "Pump design" patented technology

The invention provides a centrifugal pump performance optimization method and device, computer equipment and a storage medium, and belongs to the field of centrifugal pump design. The method comprises the steps that a parameterized model of a centrifugal pump impeller is established to define the geometrical shape of the centrifugal pump impeller, a design space is determined, and a plurality of sample points are generated; for each sample point, performing computational fluid dynamics simulation, adjusting inlet pressure, monitoring a ratio of simulation lift to rated lift, determining critical cavitation pressure corresponding to the sample point, and storing flow field data to construct a data set; training an agent model by using the data set; the lift, the efficiency and the critical cavitation pressure serve as targets, design variables serve as optimization variables, performance is evaluated through an agent model, global optimization is conducted through a multi-target optimization algorithm, and a target design scheme is selected from a Pareto solution set obtained through optimization. Therefore, the centrifugal pump performance under different design variables can be quickly and accurately predicted, multiple targets are effectively balanced, and a comprehensive optimization solution is provided.

The invention provides a pump injection design method based on an effective support coefficient, and belongs to the technical field of oil and gas field development, and the method comprises the following steps: S1, based on a fluid-solid coupling theory, establishing a hydraulic fracture proppant migration equivalent model considering a bedding fracture; s2, with the optimal laying area as the target, the hydraulic fracture proppant migration equivalent model is used for simulating the proppant migration conditions under different parameter combinations, and an effective support coefficient is calculated; s3, based on the calculation result of the effective support coefficient, analyzing the change rule of the effective support coefficient under different parameters, and establishing a distribution pattern; and S4, on the basis of the distribution pattern, the pump injection process is optimized by utilizing the optimal range of the effective support coefficient. By means of the method, optimization of pumping key parameters such as displacement, sand ratio, sand adding particle size and particle size combination can be achieved, improvement of the overall flow conductivity of a shale oil reservoir fracturing fracture system is achieved, and therefore the fracturing effect is improved.

The invention discloses a simulation method for a corresponding relation between a baffle tongue position and a flow field of a semi-spiral suction chamber, and relates to the technical field of double suction pump design and numerical simulation. According to the method, a three-dimensional flow channel model of multiple groups of baffle tongue reference position parameters is constructed, multi-working-condition simulation and quantitative analysis are combined, a mapping relation model of baffle tongue positions and flow field characteristic parameters is established, and a baffle tongue region vortex generation rule, turbulence dissipation and pressure pulsation characteristics are accurately captured; the optimal baffle tongue parameter interval is determined by combining the flow field uniformity and energy loss minimization principle, the flow loss is effectively reduced, the vortex strength and energy dissipation are reduced, and the flow field uniformity is improved, so that the pump efficiency is improved, the vibration noise and the cavitation phenomenon are inhibited, and the optimal baffle tongue parameter interval is obtained by adopting adaptive grid encryption, a multiphase flow cavitation model and a test verification mechanism. The mapping model is corrected by combining measured data, so that the optimization result can directly guide the baffle tongue design under different working conditions, the research and development period is remarkably shortened, and the physical test cost is reduced.

The invention discloses a digital twinning-oriented lead-cooled fast reactor main pump design method and system, and relates to the technical field of pump design, and the method comprises the following steps: constructing a parameterized lead-cooled fast reactor main pump flow channel geometric model; generating a control equation and boundary conditions for describing a flow field in the main pump; training the PINN proxy model through the CFD simulation data set, the control equation and the boundary condition to obtain a prediction model; and deploying the prediction model in a digital twin system to obtain a plurality of physical quantities of the flow field of the main pump of the lead-cooled fast reactor, and solving a main pump design optimization problem through the plurality of physical quantities to obtain a main pump design scheme. According to the method, the defect that re-calculation is needed due to design and working condition parameter changes caused by different application scene requirements in a traditional CFD algorithm of a PINN agent model is avoided, rapid simulation of an internal flow field can be achieved with extremely low calculation time cost and calculation resource cost, and the design cycle of a main pump is greatly shortened.

The impeller type centrifugal pump suitable for the low-specific-speed working condition comprises a volute and an impeller, the impeller comprises a rotating shaft, a first impeller cover plate, a second impeller cover plate and a plurality of blades, and the first impeller cover plate, the blades and the second impeller cover plate are sequentially and tightly arranged in the axial direction of the rotating shaft. The impeller is arranged in the volute; the volute is provided with a fluid inlet and a fluid outlet; in the axial direction, the distance between the opposite vertical faces of the radial edges of the first impeller cover plate and the second impeller cover plate is smaller than the width of the fluid outlet. And the distance between the opposite vertical surfaces of the radial edges is greater than the width of the fluid outlet. The axial width of the fluid outlet of the centrifugal pump is discussed separately from a general centrifugal pump design theory, so that the design accuracy of the low-specific-speed centrifugal pump is improved, the number of design iterations can be reduced, and the development cost is reduced.

A ductless mobile air conditioner, comprising a condenser and a water sprinkling assembly. The water sprinkling assembly comprises a water tank, a water pump and a sprinkling member, wherein the water pump is configured to convey water in the water tank to the sprinkling member, the sprinkling member is provided with a plurality of water output holes, and the sprinkling member is arranged above the condenser such that water discharged from the water output holes can drop onto the condenser. The ductless mobile air conditioner has a conventional working state in which the water pump is configured to work alternately between starting and stopping. The design of the water pump to work alternately between starting and stopping can ensure the service life of the water pump.

The invention relates to the technical field of water pumps, in particular to a novel low-cavitation sectional multi-stage pump. Two smaller first-stage impellers are adopted on the premise that the design flow of the two first-stage impellers is 1 / 2 of the design flow of the water pump; the two first-stage impellers are installed in series and are each independently provided with a guide vane. A first guide vane outlet and a second guide vane outlet are communicated through a runner cavity, so that the parallel operation state of two small first-stage impellers is realized; therefore, a single first-stage impeller only needs to bear 1 / 2 of the running flow of the pump, and the cavitation performance of the first-stage impeller can be greatly reduced; and finally, the net positive suction head can be consistent with that of a traditional first-stage double-suction stage type multi-stage pump, but the structure is more compact and simpler, and the efficiency is higher.

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 discloses a method for optimizing key structure parameters of a deep well electric submersible pump based on performance simulation, and relates to the technical field of design optimization of electric submersible pumps, a three-dimensional geometric model of a deep well submersible centrifugal pump is built in advance, the three-dimensional geometric model comprises an impeller, a guide shell, a pump shaft, a pump shell, an upper connector, a lower connector and a full-flow-channel structure, and initial structure parameters are calibrated; and establishing a centrifugal pump simulation model based on a computational fluid dynamics technology, performing fluid domain extraction, grid division and grid independence verification on the three-dimensional geometric model, and setting fluid attributes, boundary conditions and a turbulence model. According to the method, a closed-loop iteration framework for simulation, optimization, evaluation and feedback is constructed by adopting a mode of coupling a computational fluid dynamics simulation technology and a genetic algorithm, the limitation of local parameter optimization in the prior art is broken through, systematic and collaborative optimization of key structure parameters of the submersible centrifugal pump is realized, and the method is suitable for large-scale popularization and application. And the efficiency of the optimization process and the final optimization effect are obviously improved.

The utility model discloses a dynamic pressure balance dynamic seal deep well high-speed internal lift pump, and relates to the technical field of deep well pump design. The upper end cover and the lower end cover are in threaded connection with the two ends of the pump shell, a liquid inlet hole is formed in the lower end cover, the stator and the winding are fixed to the upper portion of the inner wall of the pump shell, and the open end of an annular cylinder of the annular differential pressure balancer faces downwards and is in threaded connection with the lower portion of the inner wall of the pump shell. A reset spring is supported between an annular plug and a lower end cover, a hollow main shaft of the rotor assembly is rotationally installed between an upper end cover and the lower end cover, a silicon steel sheet is fixed to the upper portion of the outer wall of the hollow main shaft, and O-shaped movable sealing rings are arranged between the hollow main shaft and an annular cylinder and between the hollow main shaft and the upper end cover. And spiral strips are arranged around the central shaft and are fixedly connected with the inner wall of the hollow main shaft through welding spots. The hollow main shaft of the motor rotor assembly serves as a flow channel, the spiral strip pieces are welded in the flow channel, abrasion is not prone to occurring, and the annular differential pressure balancer is additionally arranged to avoid leakage at the dynamic sealing position in the high-pressure environment.

The invention discloses a hybrid vehicle oil pump control method and related equipment, and relates to the technical field of hybrid vehicles, the method comprises the following steps: obtaining a driving mode of a target vehicle; based on the driving mode, engine lubrication required power and motor lubrication required power are determined; according to the engine lubrication required power and the motor lubrication required power, target control power of a duplex electronic oil pump is determined; and based on the target control power, a rotating speed control instruction is sent to a motor driving the duplex electronic oil pump. Through the design of the integrated oil pan and the duplex electronic oil pump and in combination with an intelligent lubrication control strategy based on a driving mode, structure simplification, cost reduction and efficient and reliable multi-working-condition lubrication management are achieved, and the performance and stability of the whole vehicle can be improved.

The embodiment of the invention discloses a hydraulic system of a filling industrial pump, relates to the technical field of industrial pumps, and can effectively reduce the influence of reversing of the filling industrial pump on slurry conveying. The filling industrial pump hydraulic system comprises a first main pump, a second main pump, a third main pump, a first hydraulic cylinder, a second hydraulic cylinder, a first main valve, a second main valve and a third main valve. The first main valve is connected with the first main pump and the first hydraulic cylinder so that hydraulic oil of the first main pump can flow into the first hydraulic cylinder through the first main valve. The second main valve is connected with the second main pump and the second hydraulic cylinder so that hydraulic oil of the second main pump can flow into the second hydraulic cylinder through the second main valve. The third main valve is connected with the third main pump, the first main valve and the second main valve so that hydraulic oil of the third main pump can flow into the first hydraulic cylinder through the third main valve and the first main valve, or the hydraulic oil of the third main pump can flow into the second hydraulic cylinder through the third main valve and the second main valve. The method is suitable for filling industrial pump design and application scenes.

A motionless pumping design that reduces operation and maintenance costs, and enhances reliability in three aspects of pneumatics system configuration. A motionless and corrosion-resistant pump which uses the continuous generation of pressure variation push / pull force by relying on the venturi effect induced by a pair of gas ejectors together with an argon pneumatic sub-system.

A pump unit (4) for a lubricant pump (100) is disclosed, comprising a pump housing (6) designed to be connected to a lubricant reservoir (2), the pump housing (6) having a lubricant receiving chamber (12) with at least one lubricant outlet (20), wherein at least one pump element (14) can be arranged in the lubricant receiving chamber (12) and is designed to pump lubricant from the lubricant reservoir (2) via the lubricant receiving chamber (12) to the lubricant outlet (20), the pump unit (4) further comprising a pump drive motor (28), in particular an electric motor, designed to drive the pump element (14), the pump drive motor (28) having an output shaft (30) and a drive shaft (24) rotatably mounted in the pump housing (6), the drive shaft (24) being detachably connected to the output shaft (30) of the pump drive motor (28). pump drive motor (28) can be connected.

According to the pump shell for the electronic water pump, the structure of a traditional electronic water pump is improved and optimized, an oval flow channel opening in the traditional pump shell is replaced, the design of the flow channel opening with the rectangular section is adopted, it is verified that through shape optimization of the outlet of the flow channel, vortexes generated when water flows through can be reduced, and the service life of the electronic water pump is prolonged. According to the electronic water pump, vibration caused by passing of water flow is greatly reduced, the working noise NVH value of the water pump can be greatly reduced by adopting the rectangular flow channel opening section design compared with an oval flow channel opening, and the technical problems that noise, vibration and poor sound vibration roughness performance exist in the design of an existing electronic water pump for the vehicle, and the use experience of the vehicle is affected are effectively solved. The utility model further provides an electronic water pump comprising the pump shell and a new energy vehicle comprising the electronic water pump.

This application belongs to the field of pump design technology, and particularly relates to a design verification method for the balance disc and motor electromagnetic components in a long-life pump system. The design verification method includes: Step 1, after integrating the design of the balance disc and motor electromagnetic components in the centrifugal pump system, determining the motor air gap and the outer diameter of the balance disc; Step 2, designing the parameters to be optimized in the balance disc; Step 3, using a fault diagnosis model, verifying the sliding bearing eccentricity fault of the centrifugal pump system containing the designed balance disc under operating conditions. If the verification fails, return to Step 2; otherwise, the verification is considered successful. This application ensures that the designed motor rotor diameter meets electromagnetic performance requirements, and the balance disc also has stronger balancing capabilities. Furthermore, it guarantees through verification that the designed balance disc will not cause sliding bearing eccentricity faults; significantly improving the overall performance and safety of the centrifugal pump system, while extending the lifespan of the centrifugal pump system.

The utility model discloses a magnetic rotary vane pump, and belongs to the technical field of rotary vane pumps. According to the magnetic rotary vane pump, the pump shaft input end is combined with the inner magnetic cylinder, and the isolation sleeve of the inner magnetic cylinder is connected with the pump body in a sealing manner, so that the pump body is absolutely sealed at the pump shaft input end, the problem of medium leakage at the pump shaft input end is avoided, and the safety of the pump body during working is improved; meanwhile, an independent oil chamber is adopted in the pump body to lubricate the mechanical seal of the pump shaft, so that the stability of the mechanical seal under long-time work is guaranteed, the mechanical seal can operate for a long time under the medium gasification environment, the service life of the mechanical seal is prolonged, and the risk of medium leakage is further reduced; the rotary vane pump is scientific and reasonable in design, simple and novel in structure, convenient to machine, low in manufacturing cost and high in practicability.

A fluid pump (1) comprising a motor (10), a pump head (20), and a cooling sleeve (30). The motor (10) includes a stator assembly (11) and a circuit board assembly (13) located at one axial end of the stator assembly (11). The pump head (20) and the other axial end of the stator assembly (11) together enclose a cavity (40). The pump head (20) is provided with a fluid inlet (210) and a fluid outlet (211) that communicate with the cavity (40), and coolant is designed to enter the cavity (40) via the fluid inlet (210) and is then expelled from the fluid outlet (211). The cooling sleeve (30) is attached to the outside of the stator assembly (11) and is thermally connected to the circuit board assembly (13), and the cooling sleeve (30) and the outer circumferential surface of the stator assembly (11) together enclose a cooling channel (50).The stator assembly (11) is further provided with an inlet channel (60) and an outlet channel (70) to form the cooling channel (50) and the cavity (40), so that at least some of the coolant in the cavity (40) can enter the cooling channel (50) from the inlet channel (60) and then flow back into the cavity (40) from the outlet channel (70) to dissipate the heat generated by the circuit board assembly (13) and the heat transferred to the cooling sleeve (30). The fluid pump (1) has a simple design, occupies little space, and effectively dissipates the heat for an electronic control unit of the motor.

A drive unit (100) for a motor vehicle (105) comprises a machine housing section (300) with an electric machine (115) and a transmission housing section (305) with a transmission (130), as well as a hydraulic system (135) for cooling and / or lubricating thermal and / or mechanical consumers in the machine housing section (300) and in the transmission housing section (305). The hydraulic system (135) comprises a pump system (200, 600) with a first pump (601). The machine housing section (300) has a first suction point (310) which is hydraulically connected to the first pump (601) via a first suction line (225), and the transmission housing section (305) has a second suction point (400) which is hydraulically connected to the first pump (601) via a second suction line (230). Here, the first pump (601) is designed as a gear pump, which includes more than two externally toothed pump gears (611, 612, 613).

One embodiment of the present invention provides a technology that optimally designs a single-channel pump and improves performance such as high efficiency and low vibration of the single-channel pump. A method of designing a single-channel pump according to an embodiment of the present invention includes a first step of determining a shape of a volute and setting a plurality of points inside and outside the volute, a second step of selecting a target value, which is a value for a performance numerical value of the single-channel pump, and determining a shape of an impeller suitable for the target value, a third step of setting an analytical cross-sectional area, which is a channel cross-sectional area that adjoins inner and outer points in the volute, and setting a plurality of analytical cross-sectional areas for a plurality of portions in the volute, a fourth step of setting a structure design variable, which is a structural variable of the single-channel pump, and deriving the target value by a numerical analysis, and a fifth step of deriving, as a design plan, a structure design variable value that is a value of the structure design variable that allows the target value to satisfy a preset set target value.

The utility model relates to a hydraulic control system for a hybrid power box and a vehicle, and the hydraulic control system comprises a hydraulic oil way which comprises a main oil way and a working oil way, and the working oil way comprises a low-pressure oil way and a high-pressure oil way; the oil supply module is connected with the main oil way; the pressure switch valve is arranged on the high-pressure oil way and is used for controlling the on-off of the high-pressure oil way; the oil way switching valve is arranged among the main oil way, the low-pressure oil way and the high-pressure oil way and used for switching the communication state of the main oil way and the low-pressure oil way or the high-pressure oil way; the feedback cavity communicates with the high-pressure oil way through a feedback oil way, and the feedback oil way is located between the pressure switch valve and the oil way switching valve. According to the scheme, a traditional double-pump design is abandoned, high-low pressure automatic switching under driving of a single oil supply module is achieved, hardware is reduced, and cost is reduced; the feedback cavity of the oil way switching valve and the high-pressure oil way form linkage design through the feedback oil way, automatic switching of the oil flow direction can be achieved, external control signal intervention is not needed, control logic is simplified, and reliability is improved.

The invention belongs to the field of water pump runner blade design, and particularly relates to a water pump runner with an S swept shape, a design method and an optimization method thereof. The method comprises the steps that 1, a rotating wheel three-dimensional parameterized model is established, axial coordinates z, radial coordinates r and circumferential wrap angles theta of control points P1-P5 serve as design variables, hydraulic efficiency eta and lift H serve as optimization targets, and iterative optimization is conducted through a multi-target genetic algorithm; 2, constraint conditions in the optimization process include that the curvature radius change rate between adjacent control points is smaller than or equal to 15%; the maximum deflection of the S-shaped curve of the outlet edge is less than or equal to 0.1 D0; the rounding radius ratio RP2 / RP4 belongs to [1.5, 2.0]; and 3, fitting the relationship between the design variable and the target function through the response surface model, and finally outputting a Pareto optimal solution set. The problem that an existing water pump is single in design parameter is solved, blade surface pressure gradient distribution is improved, the vortex intensity of a wake flow area is reduced, and the performance and efficiency of the water pump are improved.

The present invention discloses an integrated system for heavy oil injection and production by using a small oil pipe to launch and salvage an electric pump, comprising an outer heat injection string and an inner production string, wherein the production string comprises a small oil pipe, an electric submersible pump connector, and an inverted electric submersible pump from top to bottom, and the electric submersible pump connector is provided with a second guide flow hole. The present application involves less ground operation equipment, high operation efficiency, and saves operation resources and costs; a small oil pipe is selected as the output fluid output channel to avoid fluid immersion and scouring in the annulus between the inner production string and the outer heat injection string, thereby protecting the thermal insulation performance of the insulated oil pipe and the insulation performance of the cable, and reducing the risk of failure; the electric submersible pump unit adopts an inverted pump design, and the cable is directly connected to the electric submersible pump motor after passing through the upper production packer, reducing the risk of cable crushing and improving the operating stability of the electric submersible pump in highly deviated wells; the small oil pipe has a strong launching and salvaging capability, and can realize launching and salvaging of the electric submersible pump in highly deviated wells and horizontal wells.

The application discloses a kind of blade pump cavitation induced noise numerical prediction method, the application provides a kind of blade pump cavitation induced noise numerical prediction method based on test, this method not only can be predicted the monopole noise generated by the cavity volume pulsation under the condition of blade pump cavitation, but also can predict the flow induced noise except monopole noise.The high-precision unsteady cavitation numerical calculation of the application can provide accurate sound source information for subsequent acoustic calculation, to improve the accuracy of acoustic numerical prediction, the prediction result is applied to the low-noise hydraulic design of blade pump, which can reduce the number of tests, shorten the development cycle, save development cost, thereby improve the efficiency of low-noise blade pump design;On the other hand, it can reveal the time-space evolution characteristics of vortex structure inside blade pump and the coupling mechanism of vortex and cavitation in the process of cavitation unsteady flow, to provide theoretical support for early-stage design or later-stage optimization of blade pump.

A method of designing an artificial lift system for producing fluid from a wellbore includes receiving wellbore data indicating configuration specifications and production specifications for the wellbore and identifying a plurality of candidate electrical submersible pump (ESP) designs for implementing in the wellbore based on the wellbore data. The method further includes determining a design score for each of the plurality of candidate ESP designs, the candidate ESP designs each indicating a collection of downhole components defining an ESP system. The design score is based on inventory data for an inventory of available downhole components and historical wellbore data, the historical wellbore data indicating historical conditions for the wellbore and historical production performance for the wellbore. The method further includes selecting an ESP design from the plurality of candidate ESP designs based on an associated design score best fulfilling one or more criteria.

The invention relates to the technical field of coal mine slurry pumps, and particularly discloses a slurry pump truck for coal mine directional drilling. An energy accumulator assembly, a slurry pump assembly, a high-pressure filtering assembly, a multi-way reversing valve assembly, an oil tank assembly, a mining flame-proof LED locomotive lamp, a coal mine underground flame-proof three-phase asynchronous motor, a mining flame-proof and intrinsically safe vacuum electromagnetic starter and an installation platform similar to a table structure are sequentially arranged on a platform on the upper surface of the frame assembly from left to right. A pilot operation assembly, a portable methane detection alarm instrument, a mining flame-proof type scram button and a mining flame-proof type control button are fixedly installed on the installation platform through bolts. The technical problems that in the prior art, in order to achieve high-flow and high-pressure slurry conveying under the coal mine underground condition, the double-pump design with larger flow and pressure is adopted or the power of a pump body is improved, and consequently pollution and degradation acceleration of pump truck power hydraulic oil are caused are solved.

Disclosed herein are devices, systems, and methods relating to high-pressure fuel pump designs and features. A high-pressure fuel pump assembly includes a body, a camshaft, and an embossment. The body has a forward end and a rearward end opposite thereof and configured to couple to a low-pressure fuel pump. The camshaft is received and secured within a central bore of the body so as to be rotationally movable within the central bore. A coupler end of the camshaft is configured to couple to a drive shaft of the low-pressure fuel pump. The embossment includes at least one fastener boss configured to receive a fastener to couple the low-pressure fuel pump to the high-pressure fuel pump assembly. The embossment is formed at the rearward end of the body such that thermal stresses that cause geometrical deformations at the embossment are reduced through a range of engine temperature operating conditions.

Hydraulic braking system (30) for a land vehicle, with at least one wheel brake (48, 50) assigned to a wheel of the land vehicle; a master brake cylinder (36) which is hydraulically connected to the at least one wheel brake (48, 50), wherein the master brake cylinder (36) is configured to move hydraulic fluid into the at least one wheel brake (48, 50) when the brake system (30) is actuated by the driver; a pump (58) whose output is hydraulically connected to the at least one wheel brake (48, 50) and the pump (58) is designed to move hydraulic fluid into the at least one wheel brake (48, 50); a variety of valve arrangements (42, 44, 46, 54, 56, 60); a control unit (68) configured to control the pump (58) and the plurality of valve arrangements (42, 44, 46, 54, 56, 60); and an intermediate storage tank (10) which is hydraulically connected to the at least one wheel brake (48, 50) and an inlet of the pump (58), wherein the intermediate storage tank (10) includes a return element and is configured to - to accommodate a hydraulic fluid reserve volume during a rest state of the brake system (30), - to provide the pump (58) with the absorbed hydraulic fluid reserve volume during an actuation state for displacement into the at least one wheel brake (48, 50), and the return element comprises a piston (16) limiting the intermediate storage (10) and a first spring (22) acting on the piston (16), characterized in that the restoring element further comprises a second spring (24), wherein the first and the second spring (22, 24) are arranged such that the first spring (22) causes a restoring force directed in a first direction and the second spring (24) causes a restoring force directed in a second direction.

The utility model relates to a swimming pool water pump with adjustable water outlet, comprising a pump body, the pump body having a diversion channel and a driving mechanism, the driving mechanism being used to drive water to flow out from the water inlet end of the diversion channel to the water outlet end, the pump body being provided with at least two water outlets connected to the diversion channel, the openings of the at least two water outlets facing in different directions; an adjusting ring being rotatably sleeved on the pump body, the adjusting ring being provided with an outlet joint adapted to the water outlet, the adjusting ring being configured to be able to rotate relative to the pump body under the action of an external force, so that the outlet joint is connected to any water outlet to form the water outlet end of the diversion channel. The swimming pool water pump with adjustable water outlet designed by the utility model realizes flexible adjustment of the water outlet direction by providing a plurality of water outlets in different directions and a rotatable adjusting ring, so that the user can easily select a suitable water outlet direction according to the actual direction of the pipeline, thereby avoiding the trouble of modifying the original pipeline or adding an additional adapter.

The utility model discloses a long-acting large-displacement oil lubrication plunger pump, and belongs to the technical field of plunger pump design and manufacturing. The long-acting large-displacement oil lubrication plunger pump further comprises a pair of electric cylinders fixedly connected to the left end face of the first right partition plate. The inner side end faces of the pair of second partition plates are fixedly connected with a pair of oil storage blocks correspondingly. The inner sides of the pair of second partition plates at the same height are slidably connected with sliding rods. A liquid channel is formed in the inner side of each sliding rod; each sliding rod is fixedly connected with the output end of the adjacent electric cylinder; a pair of second one-way valves is embedded in the two ends of the inner side of each liquid channel. A first one-way valve is embedded in the position, corresponding to the oil storage block, of each second partition plate. Two pairs of first one-way valves, two pairs of second one-way valves and two electric cylinders are arranged, so that two sliding rods move oppositely, hydraulic oil is continuously input into a pump outlet, long-acting large-displacement oil pumping is achieved, and meanwhile residual hydraulic oil on the inner side of an oil storage block can be used for oil lubrication.