23results about How to "Reduce eddy current" patented technology

This invention provides a pump body assembly for a compressor and a compressor. The pump body assembly includes: a first cylinder with a suction channel, comprising a main channel and a branch channel, the axis of the main channel being inclined relative to the axis of the compressor; a connecting channel on a partition member, the axis of the connecting channel being inclined relative to the axis of the compressor; and an intake channel on a second cylinder, the axis of the intake channel being inclined relative to the axis of the compressor. The main channel, the connecting channel, and the intake channel are sequentially connected. The intake end of the main channel is located on the side of the first cylinder and / or on the end face of the first cylinder facing away from the partition member. The intake channel communicates with the chamber of the second cylinder, and the branch channel connects the main channel and the chamber of the first cylinder. The technical solution of this invention solves the problem of high suction resistance in the second cylinder of the compressor in the prior art, which leads to reduced overall energy efficiency.

This invention discloses an eccentric sleeve and a scroll compressor. The eccentric sleeve includes a shaft portion and an edge portion. The edge portion includes a front end edge and a rear end edge disposed radially on the shaft portion. The edge portion is formed by the front end edge extending around the edge of the shaft portion towards the rear end edge. The front end edge and / or the rear end edge are at least partially tangential. By implementing this invention, the front end edge and rear end edge are designed with tangential structures. When the eccentric sleeve rotates, the tangential structures of the front end edge and rear end edge cause them to be tangential to the refrigerant oil. The small contact area between the front end edge and the refrigerant oil greatly reduces the agitation of the refrigerant oil, reduces the generation of eddies, lowers the compressor's power consumption, and thus improves the compressor's energy efficiency.

The utility model discloses a high-precision low-flow-resistance stop valve, belongs to the technical field of valves, and provides the following technical scheme for solving the problem that the flow pressure adjusting precision is reduced due to vibration of a valve clack of a traditional stop valve: the valve clack is connected with a valve rod through a plurality of groups of supporting assemblies which are uniformly distributed in the circumferential direction, and an inner rod and an outer rod form an axial telescopic structure; and the turntable is in running fit with the valve rod through the L-shaped connecting ring. An annular communicating groove is formed in the top of the valve clack, an annular connecting groove is formed in the corresponding position of the bottom of the valve clack, the two grooves are communicated through communicating holes in an annular array, and a sealing ring capable of being embedded into the connecting groove is arranged in the corresponding position of the inner wall of the valve cavity. When the valve is opened, fluid can directly penetrate through the valve clack through the communicating hole to reduce impact force, the supporting assembly counteracts lateral acting force of the fluid on the valve clack through the axial bearing structure, and bending deformation of the valve rod is prevented. According to the valve, the fluid control precision and the operation stability are effectively improved while the sealing performance is kept by optimizing the fluid channel shape and the valve clack supporting structure.

This invention relates to the field of centrifugal fans, specifically disclosing a portable energy-saving electric fan and its usage method. The fan includes a housing with a grille and a fan installed inside the housing. The fan's outlet is aligned with the grille. The top of the housing has an opening through which the fan can extend. The fan's outer casing is divided into a fixed part and at least one movable part. The movable part is movable relative to the fixed part. When the movable and fixed parts are separated, maintenance tools can be inserted into the casing to inspect the inner wall and impeller. This invention allows the fan to be lifted from the housing for easy maintenance. Furthermore, the fan's outer casing can be divided into a fixed part and at least one movable part, and the fixed and movable parts can be fixed to the fixed part without connecting parts, only by a retaining element inside the housing, facilitating maintenance and return to its original position after maintenance.

This application relates to the field of fan technology, disclosing a fan and a range hood. The fan includes: a volute casing, including annular walls; and an impeller located inside the volute casing. In the axial section of the fan, the annular walls bulge towards the side away from the axis, and the outer annular wall surface of the impeller also bulges towards the side away from the axis. This improves the fan's airflow and air pressure output capacity, increases energy efficiency and air volume, and reduces noise.

The utility model discloses a kind of water storage tank structures of water cold storage, comprising: anti-vortex component, anti-vortex component includes fixed pipe, cold water inlet and outlet pipe, connecting pipe and silica gel ring.The utility model is provided with anti-vortex component, when cold water in the inside of tank body needs to be extracted or discharged, under the appearance setting of cold water inlet and outlet pipe, water flow will along the side of cold water inlet and outlet pipe, axial flow is carried out, to complete the extraction of cold water, when cold water inlet and outlet pipe needs to be installed in the position required, cold water inlet and outlet pipe are placed into the bottom of tank body, after making silica gel ring be inserted into fixed pipe inside, half ring pipe is placed in one end of cold water inlet and outlet pipe, again the position of limiting column is aligned with the hole in half ring pipe, push the force of connecting column, so that connecting column and the surface of cold water inlet and outlet pipe are attached, again threaded rod is placed into support column inside, the force of rotating guide block is applied, namely, this scheme, guide water flow to flow along axial, inhibit radial disturbance, to reduce the generation of vortex.

This utility model belongs to the field of air conditioning maintenance technology and discloses a driver's cab air conditioner, including a housing assembly, a connecting assembly, a heater, and a fan, with the fan fixed to a fan plate. During maintenance, the fan can be replaced simply by disassembling the fan plate, improving the convenience of air conditioning maintenance. Furthermore, the heater is detachably connected to the opening frame via a first and second connecting member. The heater can be replaced and maintained by disassembling either the first or second connecting member and the first baffle, further improving the convenience of air conditioning maintenance and reducing maintenance costs. By staggering the first and second connecting members, the heater is placed obliquely within the opening frame, maximizing its size within a limited space. Compared to a horizontally arranged heater, this reduces eddies generated on the windward side and increases the distance between the heater and the fan, further mitigating the risk of combustion.

This application relates to the field of lithium hexafluorophosphate production technology, specifically disclosing a high-efficiency reactor for lithium hexafluorophosphate production. The reactor includes a reactor body and a stirring shaft positioned at the center of the reactor body. A motor is fixedly connected to the top of the stirring shaft. A circular opening is formed at the center of the top of the reactor body, and a flange seal connects to an air inlet cylinder extending into the reactor body. A channel is formed at the center of the top of the air inlet cylinder, through which the stirring shaft extends into the bottom of the reactor body, forming an air inlet chamber between the stirring shaft and the air inlet cylinder. An air inlet pipe is provided at the top of the reactor body, extending into the reactor body, with its end penetrating the air inlet cylinder and communicating with the air inlet chamber. Gas is transported from top to bottom along the air inlet chamber into the reactor to participate in the reaction, resulting in a long residence time of the reactant gas in the reactor, thus ensuring that most of the gas participates in the reaction and improving reaction efficiency.

The application provides a preparation method of organic microspheres. The preparation method comprises the following steps: preparing a first organic polymer seed emulsion by using a vertical reaction kettle with baffles on the inner wall, then adding the seed emulsion into a second organic polymer emulsion, and continuously stirring in the vertical reaction kettle with baffles on the inner wall to obtain the organic microspheres. The method can obtain stable and particle size controllable organic microspheres.

The utility model discloses a tester for the wet density flow change rate of foam light soil, and belongs to the technical field of buildings. The slurry cylinder is provided with a containing cavity, a first pipeline connector and a second pipeline connector, and the first pipeline connector and the second pipeline connector are arranged at the bottom of the slurry cylinder; the hose pump comprises a suction inlet and a discharge outlet, a feeding pipe is arranged between the discharge outlet and the first pipeline connector, and a discharging pipe is arranged between the suction inlet and the second pipeline connector. One end of the supporting pipe is communicated with the feeding pipe through the first pipeline connector, the other end of the supporting pipe penetrates through the discharging disc, and a backflow gap is reserved between the discharging disc and the slurry cylinder. The device can effectively simulate the phenomenon that foam floats on the surface and slurry sinks into the bottom in the construction process of foam light soil, so that more accurate data support is provided for construction quality control.

This application belongs to the field of fans and relates to an air inlet grille and a fan. The air inlet grille includes multiple air guide ribs arranged radially around a preset axis. Adjacent air guide ribs are spaced apart, and the ends of the multiple air guide ribs near the preset axis are connected to form an air inlet area. The air guide ribs have a windward side and a leeward side arranged opposite each other. The leeward side is provided with a flow guiding structure, and the extension direction of the flow guiding structure intersects with the extension direction of the air inlet area. In this application, by connecting the ends of the multiple air guide ribs near the preset axis to form an air inlet area, providing a flow guiding structure on the leeward side of the air guide ribs, and having the extension direction of the flow guiding structure intersect with the extension direction of the air inlet area, an air inlet area is formed in the middle of the air inlet grille. After the airflow passes through the air inlet area, it can be dispersed by the flow guiding structure to effectively reduce the vortex in the middle of the leeward side of the air inlet grille, thereby reducing noise and improving blowing efficiency.

The application provides a composite slot wedge structure for inhibiting rotor eddy current of a two-axis excitation phase modifier and a two-axis excitation motor, and belongs to the technical field of two-axis excitation motors. Compared with a traditional slot wedge structure, the two-axis excitation motor adopts a double-layer composite slot wedge structure of a hard bakelite slot wedge and an aluminum bronze slot wedge, so that the two-axis excitation motor has the damping capacity and the ability of reducing eddy current at the same time, can guarantee the damping and oscillation inhibition capacity of the two-axis excitation motor, and can also run asynchronously with a large slip. The inertia support capacity of the two-axis excitation motor is improved, and the frequency stability of a power system is guaranteed. A multi-branch path ventilation groove is alternately connected by single branches and double branches, the winding heat dissipation area is significantly increased, and the turn conductor heat dissipation coefficient is improved. The stepped auxiliary slot ventilation groove and the unequal outlet diameters of the hard bakelite slot wedge are beneficial to improving the air flow distribution uniformity in each radial ventilation groove and reducing the rotor winding axial thermal imbalance.

The utility model discloses a kind of angle of automatic adjustment push force fan, it is related to air cushion vehicle accessory technical field, the utility model includes fan shell, fan shell top is connected with mounting seat, and mounting seat outer surface is connected with vertical rod, vertical rod one end is connected with support ring, vertical rod both ends are connected with cross bar;Second support rope is arranged in cross bar, and second support rope is connected with second pressure rod between cross bar, first support rope is arranged in vertical rod.The utility model is set by mounting seat, vertical rod, cross bar and support ring, and protective net is formed by mounting seat, vertical rod, cross bar and support ring, mounting seat is the outer ring support base of protective net, and support ring is the inner ring support base of protective net, main body protection is carried out by vertical rod and cross bar, vertical rod and cross bar adopt water drop shape section and sharp part is towards fan blade, can guide airflow more smoothly pass through, help to reduce the generation of vortex, turbulence;Air resistance generated by protective net is reduced, so as to play certain energy-saving effect.

The utility model relates to fan impeller technical field, concretely is a kind of high-strength aluminum alloy impeller structure for high pressure fan, including the base disc and front cover assembly made of high-strength aluminum alloy, leaf blade assembly is arranged between the base disc with the front cover assembly, annular reinforcing assembly is provided at the back of base disc, connecting piece is fixed in the center of annular reinforcing assembly, the inside of base disc is equipped with multiple annular distribution counterweight, the utility model is designed and cooperates with counterweight etc. structure of base disc, front cover assembly, leaf blade assembly, annular reinforcing assembly, connecting piece, multiple technical promotion is realized, high-strength aluminum alloy is used as main material, while having good strength basis in the guarantee light weight.

This utility model relates to a wind-resistant vehicle body, comprising a main body consisting of a front fascia, side fascias, a roof, a floor, and a tailgate. The three sides of the roof facing away from the tail are curved beams with a smoothly transitioning curved surface structure. One side of the tail is a non-curved beam with a tail fin installed. Multiple teardrop-shaped air guides arranged in a predetermined direction are integrally formed on its corrugated plate. Curved columns are installed on both sides with extended end faces. After installation, these extended end faces overlap and connect with corresponding parts of the front and side fascias, forming a curved surface structure at the transition between the front and side fascias. An arc-shaped cover is installed at the junction of the curved columns and the roof, completely enclosing the junction to form a curved surface structure. This utility model, through the curved beams, curved columns, and arc-shaped cover forming multiple smoothly transitioning curved surface structures, effectively reduces airflow impact and eddies caused by traditional right-angle or acute-angle connections. The teardrop-shaped air guides guide the orderly flow of air from the roof, reducing turbulence interference.

This utility model discloses a mixing device for a fluorine-free aqueous film-forming foam fire extinguishing agent, relating to the field of mixing technology. The mixing device includes a tank, and further includes: a mixing assembly disposed at the top of the tank, the mixing assembly comprising a motor, a drive shaft, several stirring rods, and a curved panel; a temperature control assembly disposed on the surface of the tank, the temperature control assembly comprising a liquid temperature-conducting ring, a liquid pipe, a water pump, and a temperature control box; and a fixing frame disposed on the surface of the tank, the bottom end of which is fixedly connected to a sound-absorbing plate. The inner wall of the tank is provided with several evenly distributed baffles. In this utility model, the motor drives the drive shaft to rotate, and multiple sets of stirring rods are evenly distributed on the drive shaft, with curved panels fixedly connected to the ends of the stirring rods, increasing the mixing effect and improving the mixing efficiency. Simultaneously, the multiple sets of baffles evenly distributed on the inner wall of the tank reduce eddies, increase turbulence, and enhance the mixing effect.

The present application relates to the technical field of household appliances, and discloses an oil fume exhauster, which comprises a smoke collecting cavity, a first smoke collecting part and a second smoke collecting part, the first smoke collecting part is provided with an inlet, the second smoke collecting part is connected to one side of the top of the first smoke collecting part and communicates with the first smoke collecting part, the length of the second smoke collecting part is less than that of the first smoke collecting part, a box body is arranged in the smoke collecting cavity, the box body is arranged on the top of the smoke collecting cavity and simultaneously communicates with the first smoke collecting part and the second smoke collecting part, and the second smoke collecting part forms a transition and drainage part between the first smoke collecting part and the fan, compared with the related art, the top of the smoke collecting cavity is contracted from both sides to the middle, the space on both sides of the top of the smoke collecting cavity is reduced, the vortex formed at the cavity on both sides is reduced, the air volume of the fan is improved, and the noise is reduced.

This utility model relates to the field of multi-blade centrifugal fan technology, specifically to an impeller structure, a multi-blade centrifugal fan, and a multi-blade centrifugal blower. It includes a first disc and a second disc, and several blades located between them. The blades have an arc-shaped cross-section and are spirally twisted from the end closer to the first disc to the end closer to the second disc. A first centerline L1 exists at the end of the blade closer to the first disc, and a second centerline L2 exists at the end of the blade closer to the second disc. The projections of the first centerline L1 and the second centerline L2 intersect at an intersection point P. The intersection point P, the midpoint m1 of the first centerline L1, and the midpoint m2 of the second centerline L2 do not coincide simultaneously. This utility model optimizes the blade geometry, effectively improving the airflow guidance capability, improving airflow organization, and significantly reducing eddies and flow separation phenomena, thereby improving the aerodynamic performance of the blower. Furthermore, it improves the impeller's operating efficiency while effectively reducing operating noise.

The utility model provides a kind of impeller and the centrifugal fan comprising it, impeller includes front disc, rear disc and blade, blade is connected in front disc and rear disc, blade is cut from the export end of blade towards the import end of blade along the chord length direction of blade near front disc, to form the transition section along the axial direction of impeller close to front disc and main blade section close to rear disc, along chord length direction, transition section is partially connected with main blade section, the export angle of transition section is greater than the export angle of main blade section. By cutting blade to form transition section and main blade section, and the export angle of transition section is set to be greater than the export angle of main blade section, the flow rate of airflow in transition zone is increased, to avoid forming larger vortex zone at the wall surface of volute close to front disc, so as to improve the work capacity of transition section, and then improve the work capacity of impeller as a whole, improve the efficiency of centrifugal fan with the impeller.

This invention discloses a low-voltage cable junction box with an automatic drainage and dehumidification structure, including a junction box body. A dehumidification chamber is installed at the top of the junction box body. A semiconductor heating element is installed inside the dehumidification chamber, dividing the internal space of the dehumidification chamber into a condensation chamber and a heat dissipation chamber. The two sides of the semiconductor heating element are a cold surface and a hot surface, respectively. The cold surface is placed in the condensation chamber, and the hot surface is placed in the heat dissipation chamber. This invention uses the cold surface of the semiconductor heating element to condense water vapor in the air into liquid water. Simultaneously, multiple condensation screens are provided. A first heat-conducting surface quickly transfers cooling energy to the condensation screens, cooling them below the dew point temperature. When air flows through, water vapor more easily condenses into liquid water, adhering to the surface of the condensation screens and dripping to the bottom of the condensation chamber. This effectively reduces the humidity inside the junction box, reduces the risk of electrical components getting damp, and extends the service life of the equipment.

This utility model relates to a vertical pipeline centrifugal pump, including a drive source, a pump body, a shaft system, an impeller, and a sealing component. The drive source has an output shaft; the pump body is connected to the drive source and has a suction channel; the shaft system is mounted on the output shaft; the impeller is mounted in the pump body, and the end of the shaft system facing away from the drive source is connected to the impeller; the sealing component is located at the mating point between the shaft system and the pump body; a streamlined guide boss is provided in the area of ​​the suction channel of the pump body near the impeller inlet, and the guide boss gradually contracts along the liquid flow direction; different areas of the pump body have differentiated wall thicknesses, and reinforcing ribs are provided in the areas of concentrated stress on the pump body, with the reinforcing ribs integrally formed with the pump body. This utility model guides the liquid flow evenly into the impeller through the streamlined guide boss in the suction channel, reducing eddies and low-pressure areas, thus reducing the net positive suction head (NPSH) and extending the impeller life; the differentiated wall thickness adapts to the stress in different areas, and the reinforcing ribs can disperse stress and solve the problem of deformation and cracking.

The utility model belongs to the technical field of column tube heat exchanger, especially a column tube heat exchanger baffle, including column tube heat exchanger body, the surface fixed mounting of column tube heat exchanger body has the protection shell, the inner wall fixed mounting of protection shell has the baffle, the surface of protection shell is opened the pipe hole, the surface of baffle is opened the flow guide hole, the side fixed mounting of protection shell has the flanging lug, the side of baffle is opened the flow guide groove. Fluid flows in the column tube heat exchanger body in the process, fluid will be guided by the flow guide groove of baffle one side, make fluid flow to both sides, and flow to the flow guide hole opened, reduce the stagnation zone, optimize fluid flow direction, and the drag reduction hole of water drop shape can reduce the resistance of fluid, reduce the generation of vortex, and reduce local resistance, make the flow velocity distribution more uniform, avoid fluid frequently changing direction, improve the heat exchange area, guarantee column tube heat exchanger heat exchange efficiency.

The application provides an ironing and sucking head and an ironing machine, and relates to the field of cleaning equipment technology. The ironing and sucking head comprises a shell, a sucking assembly and a filtering assembly. The sucking assembly is arranged in the shell and has an air inlet channel. The filtering assembly comprises a supporting part and a filtering piece. The supporting part is provided with a mounting hole, the mounting hole is arranged opposite to the air inlet channel, the filtering piece is arranged in the mounting hole, and the supporting part is provided with an air guide groove in communication with the mounting hole. By arranging the filtering piece in the mounting hole of the supporting part, the impurities such as fibers, dust and hair of clothes are directly intercepted, and the impurities are prevented from entering the inside of the sucking assembly. The air guide groove of the supporting part is in communication with the mounting hole, the circulation path area of the airflow can be increased, the airflow is uniformly guided to pass through the filtering piece, and the local excessive resistance caused by the direct impact of the airflow on the filtering piece is avoided. The design of the air guide groove disperses the airflow path, reduces the generation of turbulent flow and vortex flow, and thus reduces the air resistance and noise.