27results about How to "Reduce cavitation" patented technology

The utility model discloses an integrated type swing cycle pump lubricating device, including pump casing, inner rotor and outer rotor, be provided with oil cavity and with oil inlet and oil outlet of oil cavity communication on the pump casing, its characterized in that, the bottom of oil cavity is provided with annular unloading groove with oil outlet communication, and the bottom surface of annular unloading groove is multistage step surface. This integrated type swing cycle pump lubricating device can effectively buffer fluid resistance and pulsation, reduce cavitation and cavitation erosion phenomenon, and stabilize oil pressure of oil outlet.

The application relates to the technical field of preventing pump cavitation, and particularly relates to a device for preventing pump cavitation, which comprises a base, a pump shell mounted on the base, a lower shell body located on the base, an upper shell body detachably mounted on the lower shell body, and a cavitation-preventing mechanism connected with the lower shell body and the upper shell body and communicated with the pump shell, wherein the cavitation-preventing mechanism comprises a defoaming assembly and a cooling assembly; the defoaming assembly is located in the upper shell body, the cooling assembly is located in the lower shell body and connected with the upper shell body, and the cooling assembly is also communicated with the pump shell. The device for preventing pump cavitation has a novel structure, can reduce the cavitation phenomenon, prolong the service life of equipment and provide convenience for workers.

This application relates to the field of vacuum pumps, and more particularly to a vacuum pump drainage device, comprising a vacuum pump, a return water pump, and a return water well. The vacuum pump, the return water pump, and the return water well are sequentially connected via a return water pipe. Multiple vacuum pumps are provided, and at least one water collection tank is provided between each vacuum pump and the return water pump. The end of the water collection tank closest to the vacuum pump is open, and the height difference between the bottoms of two adjacent water collection tanks is 10-20 cm. This application has the effect of ensuring smooth water return from the vacuum pump and eliminating air trapped in the return water pipe.

The application discloses a flow-adjustable multi-stage throttling device and application thereof, wherein the device comprises a front flange pipeline, a flow-adjustable component and a rear flange pipeline, and the front flange pipeline and the rear flange pipeline are tightly connected; the flow-adjustable component comprises a plurality of adjustable orifice plate assemblies arranged in the inner cavity of the flange pipeline formed by the front flange pipeline and the rear flange pipeline; each adjustable orifice plate assembly comprises a sealing cover plate, a bottom plate, an adjusting rod, a rotating disc and a driver; the adjusting rod is arranged in the mounting hole of the bottom plate, the rotating disc is mounted on the bottom plate, the driver is mounted on the sealing cover plate, and the throttling hole of the sealing cover plate and the throttling hole of the bottom plate are communicated to form a throttling window; the driver is used for driving the rotating disc to rotate when rotating; the rotating disc is used for driving the adjusting rod to enter or exit the throttling window through the rotating wheel, so that the effective throttling area of the throttling window is changed. The application can actively and low-noise adjust the flow under different working conditions.

The application discloses a flood releasing device for hydraulic engineering, which comprises a flood releasing base, a water retaining wall and a flood releasing gate, a flood releasing groove is formed in the flood releasing base, the flood releasing gate is arranged on one side of the flood releasing groove, the flood releasing gate comprises a gate, a portal frame, a screw rod, a driving assembly and a hand wheel, a flood releasing hole is formed in the gate, the portal frame is fixedly arranged on the top of the flood releasing base, a sliding groove is formed in the portal frame and the flood releasing base, and the gate is slidably connected with the sliding groove. The flood releasing device for hydraulic engineering integrates a separate opening and closing assembly on the main gate, when only small flow needs to be released, the heavy main gate does not need to be driven, and only by controlling the opening degree of the cover gate, stepless and fine adjustment of the flow can be realized, the operation response is fast, the energy consumption is low, when large flow needs to be released, the cover gate can be closed first, then the main gate is lifted, full opening degree flow releasing is realized, and the flexibility and working condition adaptability of the flood releasing operation are enhanced.

The utility model discloses an axial flow water turbine water guide mechanism which comprises an upper ring seat (1) and a lower ring seat (2), a plurality of guide vanes (3) are arranged between the upper ring seat (1) and the lower ring seat (2), rotating shafts (4) are arranged in the middles of the upper ends and the lower ends of the guide vanes (3), driving rings (5) are connected to the upper ring seat (1) in a rotating mode, servomotors (6) are connected to the driving rings (5), and the servomotors (6) are connected to the driving rings (5). The upper ends of the rotating shafts (4) are connected with the driving ring (5) through a first connecting rod (7) and a second connecting rod (8), and a linkage mechanism connected with the lower ends of all the rotating shafts (4) is arranged at the bottom of the lower ring seat (2); the linkage mechanism comprises a plurality of adapter plates (9), the adapter plates (9) are fixed to the lower ends of the rotating shafts (4) respectively, third connecting rods (10) are arranged between the adjacent adapter plates (9), and the third connecting rods (10) are hinged to the adapter plates (9). The utility model has the advantage of low maintenance frequency.

The application discloses a servo cut-off valve group, which comprises a first valve body and a second valve body integrated on a valve seat. Both the valve bodies are provided with valve cavities, and the valve cavities are internally provided with valve spools driven by a servo motor through a screw rod. The valve bodies are provided with outer ring channels communicated with inlet and outlet of the valve seat on the side surfaces, the outer ring channels are communicated with the valve cavities through a plurality of uniformly distributed lateral flow channels, and the inner walls of the valve cavities are further provided with inner ring channels. The longitudinal flow channels at the bottoms of the two valve cavities are communicated with each other through channels in the valve seat. When the two valve spools synchronously rise above the lateral flow channels, fluid can sequentially pass through the flow channels, and the valve is opened; when the two valve spools synchronously descend to completely cover the lateral flow channels, the valve is closed. The two valve cavities are communicated at the bottoms to form a pressure balance cavity, so that the valve spools are hardly subjected to axial thrust when the valve is closed, and high pressure is converted into sealing force in the radial direction of the valve spools, thereby fundamentally solving the high pressure leakage problem of traditional cut-off valves, and the application is especially suitable for high pressure equipment such as filter presses.

This invention provides a server liquid cooling pump, which has the advantages of self-heating using liquid medium, high pump reliability and long service life, self-balancing pump chamber pressure difference, and near-zero leakage risk. Its structure includes a pump casing, a stator-rotor assembly, and an impeller. The stator-rotor assembly is installed inside the pump casing and drives the impeller to rotate, causing the liquid medium to flow within the flow channel. A cooling channel is also provided inside the pump casing, communicating with the flow channel. The liquid medium can enter the cooling channel and immerse the stator-rotor assembly in the liquid medium, thereby dissipating heat from the stator-rotor assembly.

The utility model provides a kind of spherical elbow belongs to pipe fitting technical field.It solves the problem of uneven distribution of fluid at branch and generation of larger noise in the prior art multi-channel elbow.The spherical elbow includes main pipe body, the main pipe body has several branch pipe bodies respectively with the communication of main pipe body, the main pipe body is spherical, the inner wall of each branch pipe body has several flow guide protrusions, the flow guide protrusions are spirally extended from the water inlet end of branch pipe body to the water outlet end, the pipe wall of branch pipe body has noise reduction hole along the length direction of branch pipe body, the noise reduction hole has multiple and is interval setting along the circumference of branch pipe body.The utility model has the advantage of solving the problem of larger noise generated during use of existing multi-channel elbow.

The utility model discloses a flow-limiting orifice plate for a backflow pipeline of a nuclear power plant, relates to the technical field of transportation of fluid in a pipeline, and is used for solving the problems of violent vibration and noise of the pipeline caused by cavitation of an existing flow-limiting orifice plate for a pipeline of a safety facility system. The restriction orifice plate comprises an orifice plate and a handle arranged above the orifice plate, the pore plate is round, the thickness of the pore plate is 1 / 10-1 / 4 of the inner diameter of the pipeline where the pore plate is located, a round hole is formed in the middle of the pore plate, and a chamfer is arranged on one side of the round hole; the size of the chamfer is 1 / 2-2 / 3 of the thickness of the pore plate; and the flow-limiting orifice plate is mounted in the pipeline through an ASME standard flange. The flow state behind the pore plate can be improved by adopting the oblique-angle flow limiting pore plate, the pipe nozzle jet flow of the right-angle pore plate is changed into orifice diffusion flow, the lowest pressure P2 behind the pore plate can be further increased, the cavitation phenomenon behind the pore plate is weakened, and the cavitation performance of the pore plate is improved.

The embodiment of the invention discloses a workpiece suction method and device, the workpiece suction method is applied to surface mounting equipment, and the workpiece suction method comprises the steps that target map data corresponding to a target tray is obtained, the target tray comprises a single-plate tray or a jointed-plate tray composed of at least two trays, and the target map data comprises at least one address matrix corresponding to each tray; the values of the elements in each address matrix are determined according to the placement positions of the to-be-sucked workpieces in each tray, and the elements with different values are used for representing whether the to-be-sucked workpieces are placed at the positions in the corresponding trays or not; and according to the address matrix, the chip mounting equipment is controlled to suck the to-be-sucked workpiece in the target tray. According to the method, the target map data containing the address matrix corresponding to the target tray is obtained, and the placement position of the workpiece in the tray is determined based on the element values in the address matrix, so that the surface mounting equipment can quickly position and suck the workpiece, the normative requirement of workpiece placement is reduced, and the efficiency and accuracy of the production process are improved.

The present application relates to the technical field of flow distribution disc, and particularly relates to a high-pressure flow distribution disc three-section flow groove anti-cavitation structure, which comprises a flow distribution disc, the flow distribution disc comprises two centrally-symmetrically arranged large waist-shaped grooves, small waist-shaped grooves are symmetrically arranged on the two sides of the large waist-shaped grooves, the small waist-shaped grooves are arranged through the flow distribution disc, three-section flow grooves and a second single-section flow groove are respectively arranged at the two ends of the large waist-shaped grooves, and the two three-section flow grooves are centrally symmetrically arranged; the three-section flow groove comprises three triangular grooves which are completely identical in structure, the three triangular grooves are arranged at equal intervals, and one end of a same circular-arc groove is communicated with the end portions of the three triangular grooves, and the other end of the circular-arc groove is communicated with the large waist-shaped groove. The present application can increase the flow area, reduce the jet velocity, weaken the influence of wall shear force, thereby inhibit vortex production, further inhibit cavitation phenomenon of the flow distribution disc of the axial plunger pump under high-pressure working condition, reduce flow pressure pulsation and cavitation, and improve the efficiency and service life of the axial plunger pump.

The utility model discloses a refrigerating system and refrigerating equipment, and relates to the technical field of refrigerating equipment, the refrigerating system comprises a compressor, a condenser, a capillary tube and an evaporator, the compressor, the condenser, the capillary tube and the evaporator are communicated in sequence; the refrigerating system further comprises a gas-liquid separator, the capillary tube comprises a first branch tube and a second branch tube, the first branch tube is communicated with an outlet of the condenser and an inlet of the gas-liquid separator, and the second branch tube is communicated with a liquid outlet of the gas-liquid separator and a first inlet of the evaporator. The evaporator is further provided with a second inlet, and a gas outlet of the gas-liquid separator is communicated with the second inlet. According to the refrigerating system and the refrigerating equipment, noise can be reduced.

The application discloses a bearing retainer with slot type through cavities, each cross beam of the bearing retainer is provided with two slot type through cavities which are distributed along the radial direction of the retainer body; one slot type through cavity is used for connecting the converging area on one side of the cross beam with the diverging area on the other side, and the other slot type through cavity is used for connecting the diverging area on one side of the cross beam with the converging area on the other side. The bearing retainer can realize the stable lubricating oil flow self-enhancement effect near the friction surface through the slot type through cavities, effectively reduces the extrusion flow and the oil film cavitation degree near the friction surface between the rolling body and the retainer, makes the lubricating oil near the friction surface more efficient, reduces the friction resistance and the wear condition, improves the heat dissipation capacity of the bearing, and collects the bearing abrasion through the slot type through cavities, avoids the abrasion from entering the contact area of the friction surface in the flowing process, and makes the bearing appear more serious wear problems.

The invention relates to the technical field of filtering equipment, and discloses terrestrial heat recharging equipment with an impurity removal function and a method thereof.The terrestrial heat recharging equipment with the impurity removal function comprises a filtering tank, a sealing cover arranged at the top of the filtering tank, a water inlet pipe arranged on the outer side of the filtering tank and a water outlet pipe arranged on the outer side of the sealing cover; the filter cartridge is arranged at the bottom of the sealing cover. According to the geothermal recharging equipment and method with the impurity removal function, by arranging the cleaning assembly, during impurity removal, high-pressure water flow enters a backwashing space along a connecting pipe, the water penetrates through a filter cartridge from inside to outside and flushes the filter cartridge, then a screw rotates to drive a cleaning head to move up and down in the filter cartridge, the filter cartridge is flushed little by little, and the cleaning efficiency is improved. In this way, pressure is concentrated in a small area, the washing effect on the filter cartridge can be improved, the flowing path of water flow can be effectively mastered, comprehensive washing of the filter cartridge is achieved, and cleaning dead corners are avoided.

This utility model discloses an anti-cavitation device for a desulfurization pump. This utility model relates to the field of desulfurization pump technology. The anti-cavitation device includes: a pump body; an anti-cavitation component fixedly connected to the outer wall of the pump body; a motor fixedly connected to the outer wall of the pump body; the anti-cavitation component includes an impeller baffle; a first impeller is fixedly connected to one side of the outer wall of the impeller baffle; and a second impeller is fixedly connected to the other side of the outer wall of the impeller baffle. Holes are formed in the walls of both the first and second impellers, and the holes are arranged in ascending order of size along the outer wall of the first impeller. This anti-cavitation device, through the linearly distributed holes of varying sizes on the impellers, can change the flow field characteristics inside and around the impellers, suppress bubble generation, appropriately reduce the centrifugal force during impeller rotation, make the pressure distribution at the impeller inlet more uniform, and reduce the occurrence of cavitation.

This invention belongs to the field of automotive component technology, and specifically relates to a hybrid vehicle motor cooling device and its design method. Through a rational layout of the main circulation pipeline and branch expansion chambers, it achieves tiered energy absorption for cooling the multi-function controller and water pump assembly, expelling air, reducing cavitation, and lowering the possibility of leakage. A unique spatial arrangement places most of the cooling circulation system within the convection air passage between the cooler and the battery, facilitating heat dissipation and cooling. The cooling pipe type and length determined by this method result in a shorter overall length of the cooling system hoses, facilitating integration and preventing buckling during installation, thus ensuring stable and reliable heat dissipation performance. This invention also provides a non-transitory readable recording medium storing a method program and a system containing this medium. The program can be invoked by a processing circuit to execute the above method.

This utility model discloses a multi-stage pressure-reducing regulating valve for cavitation prevention, comprising a valve body. The valve body is characterized by a valve cover mounted on its top, an outlet pipe and an inlet pipe respectively located on opposite sides of the valve body, a valve seat mounted inside the valve body, a valve stem slidably fitted inside the valve body, a valve core corresponding to the valve seat mounted at the bottom end of the valve stem, a pneumatic actuator mounted on the top of the valve cover, and one end of the valve stem passing through the top of the valve body slidably fitted inside the valve cover and cooperating with the pneumatic actuator. The valve body contains a pressure-reducing inner cylinder and a pressure-reducing outer cylinder, with the outer wall of the inner cylinder and the inner wall of the outer cylinder in contact and in both sliding and rotating fit. This utility model, through the pressure-reducing inner and outer cylinders, enables the pressure-reducing inner and outer cylinders to reduce the pressure of the medium flowing within the valve body. This allows the medium to pass through multiple first and second through holes, and the first and second connecting grooves reduce the impact force of the medium, facilitating pressure reduction within the valve body and reducing cavitation.

The invention relates to an anti-cavitation vertical steam generator which comprises an upper tube box, a lower tube box, an upper tube plate, a lower tube plate, a shell pass barrel, a heat exchange tube and an anti-cavitation structure. A barrel inlet communicated with the cold flow cavity is formed in the lower side of the shell pass barrel and located above the lower tube plate, and a barrel outlet communicated with the cold flow cavity is formed in the upper side of the shell pass barrel and located below the upper tube plate. The heat exchange pipe is used for containing a high-temperature medium and is arranged in the cold flow cavity in an extending mode in the vertical direction. The anti-cavitation structure comprises a defoaming pipe and an anti-cavitation plate, the anti-cavitation plate is arranged in the cold flow cavity and located between the upper pipe plate and the outlet of the barrel in the vertical direction, the defoaming pipe is used for containing a second cooling medium, the defoaming pipe penetrates through the anti-cavitation plate, and an outlet of the defoaming pipe protrudes out of the upper surface of the anti-cavitation plate. The anti-cavitation plate can prevent the first cooling medium from directly impacting the upper tube plate; and the second cooling medium in the defoaming pipe can reduce the temperature of the medium at the outlet of the barrel body, so that bubble formation and cavitation phenomena are reduced.

The utility model belongs to the technical field of tobacco processing equipment, and discloses a knife door structure and shredding equipment. The knife door structure comprises an upper knife door, a lower knife door and two side knife doors, the upper knife door comprises an upper knife door body and two upper pressing arc parts, the two upper pressing arc parts are arranged at the two ends of the upper knife door body in the length direction, and the two upper pressing arc parts extend from the upper knife door body in the direction close to the lower knife door; the lower knife door comprises a lower knife door body and two lower pressing arc parts, the two lower pressing arc parts are arranged at the two ends of the lower knife door body in the length direction, and the two lower pressing arc parts extend from the lower knife door body in the direction close to the upper knife door. When the knife door structure applies pressure to materials, the pressure can be transmitted to the materials through the upper pressing arc part and the lower pressing arc part, the pressure can have component force in the horizontal direction, the pressure applying effect is optimized, the compaction degree of the materials can be improved, the cavity phenomenon is effectively reduced, sheet running is prevented, and the tobacco shredding quality and the production efficiency are improved.

The utility model relates to an amphibious spherical robot, including spherical shell, wheeled module, propeller module and foot leg module, spherical shell includes intermediate spherical shell and half spherical shell, installs center support in spherical shell, installs steering motor on center support, and steering motor connects heavy piece, be equipped with main beam and a plurality of support arms on center support, and half spherical shell is connected with support arm through spherical shell fixed support, propeller module is installed on main beam, and foot leg module is installed on support arm, wheeled module is installed on intermediate spherical shell, compared with prior art, the utility model has modularization design, combines multiple movement modes, has certain obstacle crossing ability and amphibious movement ability, adopts propeller module to make it can float on the water surface and can complete straight running and steering actions, adopts foot leg module under complex terrain conditions, satisfies obstacle crossing ability and other advantages.

An energy-saving guide wheel design method, through CFD analysis, selects an energy-saving guide wheel that meets the use of a real ship, selects the maximum energy-saving effect as the optimal method by energy-saving effect = ((PD_with energy-saving guide wheel / PD_naked ship)-1)*100%, determines the size and installation position of the energy-saving guide wheel, selects a good energy-saving effect scheme, and then determines it through testing, improves the propelling efficiency, reduces the energy loss of the propeller wake rotation, and the efficiency is improved by about 3-8%; the structure-matched energy-saving guide wheel can further reduce fuel consumption, and the comprehensive fuel-saving effect will exceed 2-5%, reducing the annual operating cost; reducing cavitation and vibration, optimizing water flow uniformity, reducing propeller cavitation corrosion and ship vibration, and prolonging equipment life; adapt to multiple working conditions, and the partially self-adaptive guide wheel can adjust the angle to adapt to different drafts or speeds.

The utility model provides a kind of static hydraulic stepless speed changer, belong to speed changer technical field.It solves the motor swash plate peripheral wear and tear and other technical problems of existing speed changer.This static hydraulic stepless speed changer, including fixedly connected shell and shell cover, shell and shell cover between being provided with pump assembly and motor assembly, motor assembly and shell between being provided with motor swash plate, the upper end surface of motor swash plate is horizontal plane lower end surface is inclined surface, shell is provided with motor cavity, the upper end surface of motor swash plate and the top wall of motor cavity abut and are fixed by at least two cylindrical pin, the upper end of motor swash plate and shell form a fixed groove jointly, bearing one is fixedly arranged in fixed groove, motor main shaft is connected in bearing one, the side of motor swash plate is the free surface of no contact, the lower end surface of motor swash plate is fixedly connected with motor thrust plate.The utility model improves the service life of motor swash plate and motor thrust plate, improves the reliability of whole machine.

The utility model discloses a thermal deoxidizing and energy-saving system for a boiler. The thermal deoxidizing and energy-saving system comprises a water softener, the boiler, a deaerator, a first heat exchanger, a second heat exchanger and a third heat exchanger, the water softener is used for softening water, the output end of the water softener communicates with the first heat exchanger, the output end of the first heat exchanger communicates with a heat exchange water tank, and the output end of the heat exchange water tank communicates with the input end of the deaerator; the boiler is provided with a steam output pipe, a smoke exhaust pipe and a blow-off pipe, the boiler is used for generating steam, the smoke exhaust pipe is used for discharging smoke of the boiler, and the blow-off pipe is used for discharging sewage in the boiler; the output end of the deaerator, the second heat exchanger, the third heat exchanger and the boiler are sequentially communicated, the second heat exchanger is arranged in the heat exchange water tank, and the third heat exchanger is arranged in the smoke exhaust pipe; a first water pump is arranged between the second heat exchanger and the third heat exchanger. The thermal deoxidizing and energy-saving system of the boiler can reduce steam consumption and improve heat efficiency.

This application provides a hydraulic clearance adjuster, an engine, and a vehicle. The hydraulic clearance adjuster includes: a housing; at least a portion of a plunger disposed within a first receiving cavity, with an oil drain channel formed between the outer peripheral surface of at least a portion of the plunger and the side wall of the first receiving cavity, and a first working cavity formed between the bottom of the plunger and the bottom of the first receiving cavity, the plunger being movably disposed relative to the housing to change the volume of the first working cavity; a first annular gap formed between the inner ring of a seal and the outer peripheral surface of the plunger, the first annular gap communicating with the first working cavity; a second annular gap formed between the outer ring of the seal and the inner side wall of the housing, the second annular gap communicating with the oil drain channels located on both sides of the seal; and a communicating channel formed on at least one of the seal and the housing, the communicating channel communicating with the oil drain channels located on both sides of the seal. The hydraulic clearance adjuster dynamically adjusts the flow cross-section of the oil drain channel according to the oil pressure, thereby precisely controlling the hydraulic stiffness damping.

The utility model discloses hydraulic system technical field discloses a control system and loader for loader boom. A control system for loader boom, including distribution valve and hydraulic cylinder. Distribution valve includes second control valve and first control valve, and second control valve is communicated with first control valve, and second control valve is equipped with at least drop position, floating position. Hydraulic cylinder is communicated with second control valve, first control valve through pipeline respectively. Through second control valve, the regenerative capacity of hydraulic system is promoted, and makes the loader equipped with the control system for loader boom of this application can control the pressure and speed of boom drop flexibly, reduces the component suction, or the phenomenon of boom step in the boom operation process.

The utility model provides a zinc aluminum alloy steel wire production device belongs to alloy wire cooling field. Solve the problem of inert atmosphere mixing efficiency low and gas consumption amount big. It includes fixed air pipe, and one end is closed end, and the other end is open end, rotates the air pipe, and fixed air pipe coaxial arrangement and the air outlet end by the closed end inserts in fixed air pipe, the air outlet end is used for jet flow N2 and forms the back pressure area in fixed air pipe, rotates the air pipe wall and the circumference even arrangement several with the angle air outlet, blade, is used for the air outlet gas of the angle air outlet to add the circumferential force when rotating, air inlet hole is provided with several and even penetrates the fixed air pipe wall surface on the back pressure area corresponding and sets up, CO2 buffer cavity is used for introducing CO2, heat insulation flow guide part is used for isolating the rotary connection of rotating air pipe and CO2 airflow, and gently flow guide airflow to the blade. It is mainly used for zinc aluminum alloy steel wire cooling.