383results about "Radial flow pumps" patented technology

An exhaust turbocharger has a housing, in which a shaft is mounted by bearings, which carries a turbine wheel, on the one hand, and a compressor wheel, on the other hand. An electric machine has a rotor and a stator. The rotor is secured on the shaft for conjoint rotation therewith and the stator surrounds the rotor radially on the outside. A sleeve, which supports the rotor radially and axially, is arranged between the stator and the rotor. The sleeve has at least one fluid duct, by way of which a cooling fluid can be guided toward the bearings of the shaft.

An electric pump including a shaft extending in an axial direction, a rotatable rotor located at an outer side of the shaft in a radial direction, a stator located at an outer side of the rotor in a radial direction and surrounding the rotor, a pump portion coupled to the rotor at one side in an axial direction, a housing to accommodate the rotor and the stator, a circuit board located at another side of the housing in an axial direction, and a cover configured to cover another side of the circuit board in an axial direction. The cover includes a base portion, heat dissipation portions protruding more toward another side than the base portion, and a raised portion protruding more toward another side in an axial direction than the base portion and the heat dissipation portions.

The application discloses an axial sealing lubricating mechanism and a double-suction centrifugal pump containing the same, relates to the technical field of centrifugal pumps, and comprises a pipe body one and a pipe body two, the pipe body one is provided with openings in a circle, the openings are all provided with moving rings, the outer side of the openings is provided with static rings, the moving rings and the static rings abut against each other, the outer side of the pipe body one is provided with a sleeve ring, the outer side of the sleeve ring is provided with an annular groove, the outer side of the annular groove is provided with a plurality of groups of through openings in a circle, movable blocks are arranged in the through openings, movable ports are formed in the movable blocks, rubber rings are formed in the plurality of groups of movable ports, the different material expansion coefficients of the moving rings and the static rings make the static rings have a slight axial displacement, the risk of lock caused by excessive expansion of materials under high temperature is avoided, fresh lubricating oil is directly delivered to a friction surface through an auxiliary mechanism, and wear debris is washed away.

The application discloses a novel inclined flow type downhole natural gas compressor and belongs to the technical field of natural gas exploitation. The compressor is in a multistage series connection structure and comprises a plurality of single-stage compression modules. Each module comprises coaxially arranged diffuser pipelines, rectifier pipelines and inclined flow impellers. The inclined flow impeller is integrally formed by using gradient functional materials, and the material composition continuously changes from the hub side to the blade tip side. The compressor is provided with an electromagnetic coupling self-balancing system. The rear radial magnetic bearing and the thrust bearing share the same set of electromagnetic windings and simultaneously bear the radial suspension and axial thrust control. The conductive ring on the back of the impeller disc is electromagnetically coupled with the induction coil to realize the self-sensing of the axial force without displacement sensors and actively balance the axial force through a closed-loop control algorithm. The application realizes high-speed and high-reliability operation in a limited downhole space.

The application provides a cross-flow fan, an air conditioner and a control method thereof. The cross-flow fan comprises a driving component, a cross-flow fan blade and a magnetic suspension bearing. One end of the cross-flow fan blade is connected with the driving component, the other end of the cross-flow fan blade has a rotating shaft, the rotating shaft has magnetism, the magnetic suspension bearing is sleeved outside the rotating shaft, the magnetic suspension bearing comprises a stator core and a plurality of coil groups, the stator core has a plurality of pole column units, each pole column unit is distributed at intervals along the circumference of the stator core, and each coil group is wound around each pole column unit. According to the application, the magnetic suspension bearing suspends the cross-flow fan blade away from the one end of the driving component in the air through controllable magnetic field force, realizes high-speed operation of the rotating structure and the stationary structure without contact, eliminates the friction between the cross-flow fan blade and the surrounding components during operation, greatly reduces the noise generated during the operation of the cross-flow fan, and improves the mute performance of the air conditioner indoor unit and the service life of the cross-flow fan blade and other components.

The application belongs to the technical field of centrifugal pumps, in particular to a high-efficiency single-stage end centrifugal pump, which comprises a centrifugal pump main body, a liquid inlet pipe is vertically arranged on one side of the top of the centrifugal pump main body, a liquid outlet pipe is horizontally arranged on one side of the centrifugal pump main body, a filter plate for filtering impurities in liquid is fixedly connected to one side of the inner wall of the liquid inlet pipe, a plurality of rows of filter holes are uniformly arranged on the filter plate in the circumferential direction, and an intermittent dredging assembly for preventing the filter holes from being blocked is arranged on the liquid inlet pipe. The intermittent dredging assembly can continuously reciprocate up and down through the dredging column during the liquid conveying process, lift the impurities covered on the surface of the filter plate or adhered to the inner wall of the filter hole, and make the impurities away from the filter hole, so as to avoid the impurities from blocking the filter hole and ensure the smooth passing of the liquid. In addition, the above-mentioned dredging process does not need to stop the centrifugal pump, thereby ensuring the continuity of the liquid conveying.

The present application relates to the technical field of range hood, and particularly relates to a centrifugal fan and a range hood. The centrifugal fan comprises a volute; the volute comprises a side plate and a surrounding plate, the surrounding plate and the side plate jointly form an inner cavity and an air outlet, a plurality of flow guide fins are arranged at the inner cavity close to the air outlet, a first flow guide air duct is formed between adjacent flow guide fins and between the flow guide fins and the surrounding plate; from the side close to the volute tongue to the side away from the volute tongue along the impeller axis direction, the distance between the end away from the air outlet and the air outlet surface of the air outlet gradually increases in the projection of each flow guide fin. The range hood comprises the above centrifugal fan. The centrifugal fan and the range hood provided by the present application divide the air outlet into a plurality of independent first flow guide air ducts by arranging a plurality of flow guide fins at the inner cavity close to the air outlet, so that the high-speed airflow and the low-speed airflow are respectively separated into different first flow guide air ducts, so as to ensure that the airflow velocity is uniform at the air outlet and prevent the generation of vortex and wind noise.

A disk-pack turbine includes two disks each having a waveform surface and a second surface, the waveform surfaces face each other and have an axially centered waveform pattern, at least one disk includes an axially centered opening passing from the second surface to the waveform surface, the disks define an expansion chamber including the at least one opening and a disk chamber between the disks from the expansion chamber to a periphery of the disks. The waveform pattern includes at least one waveform that has an amplitude that varies in a radial direction and the waveform pattern maintains or increases the number of peaks for each level of waveforms progressing out from the inner most waveform about the axial center to the periphery where the increase is by a multiplier of 2 to 8. The second surfaces have a slight parabolic shape or are flat.

The embodiment of the application provides a centrifugal fan and electronic equipment, and relates to the technical field of centrifugal fans. The centrifugal fan comprises an upper cover plate and a lower cover plate. At least one of the upper cover plate and the lower cover plate comprises a composite board, and the composite board comprises at least three layers of fiber composite material layers arranged side by side along the thickness direction of the centrifugal fan. The material of the fiber composite material layer comprises a fiber material and a resin material. In this way, the upper cover plate and the lower cover plate are made of the fiber composite material, so that the thickness of the centrifugal fan can be reduced while the weight of the centrifugal fan is reduced, and the electronic equipment can be designed to be light and thin.

The invention relates to a compression device (10) for a drive train (100) of a motor vehicle (K), comprising at least two compressors (30, 40) driven via a common shaft (20), of which a first compressor (30) of the at least two compressors (30, 40) is configured for pre-compression of a medium (14) and of which a second compressor (40) of the at least two compressors (30, 40) is configured for post-compression of the medium (14), and comprising a cooling device (50) through which the medium (14) flows, the at least two compressors (30, 40) being connected to each other via the medium-carrying system, and which is arranged downstream of the first compressor (30) and upstream of the second compressor (40) for cooling the medium (14). Further aspects of the invention relate to a drive train (100) with a compression device (10) and a motor vehicle (K).

A fan assembly (1) for a hood for extraction of cooking fumes, used above a cooking hob in a kitchen, comprising a casing (2) and an impeller (22) driven by an electric motor (20), said casing having an internal cavity (4) delimited by a wall (3) and suitable for housing said impeller (22) and said electric motor (20), said impeller (22) being located in said internal cavity (4) in such a way as to define with said wall of said internal cavity a helical duct (25) for the entry of vapours into said internal cavity, said helical duct opening into a terminal outlet (5), and the casing (2) being open on opposite sides (6, 7) (at 8, 9) to favour the entry of vapours at opposite heights of said impeller (22). Said wall (3) of said casing comprises a plurality of portions (30, 31, 32, 33, 34, 35, 36) having different radii or radial configurations from one another.

A submersible well fluid pump (12) has diffusers (41) non-rotatably mounted in a pump housing (21). A drive shaft (29) rotates an impeller (43) between each of the diffusers. A bearing (45) is positioned between and in abutment with two of the diffusers. An annular recess (55) encircles an outer wall (61) of the bearing. A wave spring (85) has undulations with inward protruding indentations (93) in contact with a base (86) of the recess and outward protruding indentations (91) in engagement with an inner wall (27) of the housing. The wave spring is split and radially compressed between the base of the recess and the housing inner wall.

Disclosed is a cooling fan (10) that includes an outer guide (23) and an inner guide (22). The outer guide (23) has a portion positioned between an upper end (21a) and a lower end (21b) of fins (21) in the axial direction and between two adjacent fins (21), and guides air toward the radial outside of an impeller (20). The inner guide (22) is positioned between the upper end (21a) and a lower end (21b) of the fins (21) in the axial direction, positioned closer to the center in the radial direction than the outer guide (23), and configured to guide the air toward the radial outside of the impeller (20). Consequently, the flow rate and flow velocity of the air delivered to the upper and lower sides of a circuit board (80) can be made appropriate.

The centrifugal fan with adjustable inlet pressure in wide working condition of the application is provided with a first flange plate fixedly installed at the inlet; the end of the motor away from the blade is fixedly connected with a second flange plate through a second adjusting column; the first flange plate and the second flange plate are fixedly connected through a first adjusting column installed outside the fan; the first adjusting column is a coarse adjustment, which can adjust the axial position relationship between the flow collector and the wheel cover from the inlet direction to change the auxiliary flow channel structure for coarse pressure adjustment; the second adjusting column is a fine adjustment, which can adjust the axial position relationship between the flow collector and the wheel cover from the outlet direction to change the auxiliary flow channel structure for fine pressure adjustment; in the working condition, the high efficiency area on the performance curve is wider and the unstable area is reduced; in the pressure, the leakage impact and friction loss are reduced; in the efficiency, the efficiency loss is reduced; and in the reliability, the reliability and stability are improved.

An air blower assembly and a ducted air conditioner are provided. An air blower assembly includes a plurality of air blowers, wherein the plurality of air blowers are sequentially connected and capable of rotating at a same time to change orientations of air outlets of the plurality of air blowers, and rotating axes of the plurality of air blowers are collinear; and a driving apparatus, in driving connection with the plurality of air blowers and configured to drive the plurality of air blowers.

This invention discloses a centrifugal booster pump for aircraft fuel systems and its maintenance-free method, belonging to the field of aircraft fuel system design technology. The centrifugal booster pump includes a pump housing and a pump core. The pump housing is a purely mechanical structure, fixedly installed at the bottom opening of the aircraft fuel tank, and integrates a self-sealing valve assembly. The pump core is detachably connected to the pump housing and includes a DC brushless motor and an impeller driven by the motor. When the pump core is installed inside the pump housing, it mechanically opens the self-sealing valve assembly, allowing fuel to enter. When the pump core is disassembled, the self-sealing valve assembly automatically resets and closes, isolating the fuel outside the pump housing, achieving maintenance-free operation. This invention, through the separate design of the pump core and housing, the integration of the self-sealing valve, and the application of a brushless motor, simultaneously solves the problems of needing to drain fuel and periodically replace carbon brushes during the maintenance of traditional centrifugal booster pumps, significantly improving the maintainability and economy of the product.

This utility model relates to the field of centrifugal pump technology, and in particular to a novel end-suction centrifugal pump inlet ring. The inlet ring has a first groove and a second groove machined on its left side. The inner wall of the first groove is slidably connected to a sealing gasket, and the conical groove is machined on the inner wall of the pump body. With the cooperation of the pump housing and the mounting structure, the operator inserts the inlet ring into the conical groove, then inserts the sealing gasket into the first groove. The operator then aligns the threaded hole on the inlet ring cover with the threaded hole on the pump body. Using a screwdriver, the operator rotates multiple bolts (Phillips head bolts) to screw the bolt ends sequentially onto the inlet ring cover and the pump body. When the sealing gasket is firmly pressed against the inlet ring and the inlet ring cover on both sides, the inlet ring is fixed. The conical groove is wider on the left and narrower on the right, and the conical shape of the inlet ring makes it easier to insert into the conical groove, allowing for quick installation.

This utility model discloses a low-noise centrifugal pump for petrochemical applications, comprising a centrifugal pump body, an impeller movably mounted inside the pump body with an impeller shaft mounted on it, an inlet pipe at the front of the pump body, a drain pipe at the top of the pump body, and a low-noise mechanism wrapped around the outside of the pump body. The low-noise mechanism consists of noise reduction covers A, B, C, and D. Noise reduction cover B is fixedly mounted at one end of noise reduction cover A, and noise reduction cover D is fixedly mounted at one end of noise reduction cover C. This low-noise centrifugal pump for petrochemical applications features modularly designed noise reduction covers that can be quickly installed using a mounting bracket without complex tools or specialized skills, reducing the noise level generated by the centrifugal pump and preventing damage to the inner ear hair cells of factory workers, thus avoiding irreversible hearing loss. The rock wool itself has a porous fiber structure, primarily absorbing mid-to-high frequency noise.

The invention relates to a fan (15) comprising an annular housing (20) with an inlet opening (45) and an opposite outlet opening (50), the housing having an aerodynamic profile (30) in the cross-section and a radially inwardly facing inner surface (25), along which a slot (35) is provided through which air from a first source can flow via a fan (115), the air flowing in the direction of the outlet opening (50) via the aerodynamic profile (30). An axial fan (55) having a rotor blade (60) is provided in the interior of the annular housing (20), the axial fan conveying air from the inlet opening (45), as a second source, in the direction of the outlet opening (50) such that the discharged air is composed of the air flow from the first source (110) and the air flow from the second source (95). The invention also relates to a heat exchanger assembly (75) comprising such a fan (15).

This invention discloses a coaxial, side-connected, series-connected dual-impeller centrifugal fan and its fluid pressurization and conveying method, including a primary pressurizing impeller and a secondary pressurizing impeller; a baffle plate is fixed inside the primary impeller casing, and multiple arc-shaped guide plates are fixed on the side of the baffle plate facing the fluid outlet of the primary impeller casing; a circular arc noise-reducing flow channel is formed between the baffle plate, an integrally formed volute inside the primary impeller casing, each arc-shaped guide plate, and the arc-shaped inner wall of the primary impeller casing; the volute has a guide channel, one end of which is connected to the fluid inlet of the guide channel; the fluid outlet of the guide channel is connected to the fluid outlet of the primary impeller casing through an arc-shaped flow channel, and the side of the arc-shaped noise-reducing flow channel is connected to the fluid outlet of the primary impeller casing through the remaining arc-shaped flow channels. This invention pressurizes the impeller through two stages of pressurization, and significantly reduces the noise and energy loss of the primary pressurization stage by relying on the arc-shaped noise-reducing flow channel and the arc-shaped flow channel, thereby delivering high pressure.

An air purification device (1) with a novel air guide consists of a housing (13) which has at least one air intake area (26) formed in an intake plenum (3) for drawing contaminated air into the housing (13) and at least one air discharge area (27) formed in an outlet plenum (8) for blowing the filtered air out of the housing (13), wherein at least one fan wheel (7.1) of a radial fan (7) rotatable about a fan rotation axis (18) and at least one air filter (2) for filtering the air drawn in through the air intake area (26) are arranged in the housing (13), and the main nozzle airflow (5.4) formed downstream of the air filter (2) is deflected at a main nozzle (5) arranged upstream of the fan wheel (7.1) in the housing (13) in the direction of the fan wheel (7.1), wherein for optimized airflow to the fan wheel (7.1) of the radial fan (7) and in order to homogenize the air quantities in the air-conducting inlet plane of the radial fan (7), the main nozzle airflow (5.4) is separated by an auxiliary nozzle (6) arranged upstream in front of the main nozzle (5) and splitting the main nozzle airflow (5.4), which supplies an auxiliary nozzle airflow (6.4) split from the main nozzle airflow (5.4) into the inner intake area of ​​the fan wheel (7.1).

The application provides a horizontal compressor liquid accumulator support structure and a horizontal compressor. The support structure comprises a connecting seat, the bottom of the connecting seat is fixed to the side wall of the horizontal compressor, the connecting seat is connected to the side of the horizontal compressor, the center of the connecting seat is protruded away from the direction of the housing of the compressor, and the connecting seat extends along the circumference of the compressor; and an arc-shaped support part connected to the side of the connecting seat, the arc-shaped support part is used for surrounding and tightly clamping the liquid accumulator with an arc-shaped clamp. The application has simple structure, can reduce the process difficulty during welding, and can improve the stress strength of the support structure.

The utility model discloses a fixed base of horizontal centrifugal pump, which comprises a first horizontal plate and a second horizontal plate, the second horizontal plate is abutted on the ground, the second horizontal plate is connected with the first horizontal plate through a supporting plate, a base is symmetrically arranged on the first horizontal plate, a centrifugal pump is fixedly connected on the base to be arranged above the first horizontal plate, a cable routing column is arranged on the first horizontal plate, a control box is arranged on the cable routing column, a control cable connected between the control box and the centrifugal pump is arranged in the cable routing column, a cable horse leg is arranged on one side of the first horizontal plate to fix the power cable of the centrifugal pump. The fixed base of horizontal centrifugal pump avoids the direct placement of the centrifugal pump on the ground, the rust caused by the ground moisture, and the problem of large vibration caused by uneven ground, and the control cable and power cable of the centrifugal pump are arranged more regularly and beautifully.

A vacuum pump is proposed that has favorable back pressure performance even in a case where an intake gas is a hydrogen gas or the like. A vacuum pump 100 includes an exhaust portion 114 constituted of a turbine pump portion 115 that includes a plurality of stages of rotor blades 102 and a plurality of stages of stator blades 123, and a drag pump portion 116 that is located on a further toward exhaust downstream side than the turbine pump portion 115, exhausts from an outlet port 133 through a gas flow passage FP1 an intake gas sucked from an inlet port 101 by the exhaust portion 114, and includes an introduction flow passage FP3 through which an intermediate introduction gas having viscosity higher than that of the intake gas is introduced, and the introduction flow passage FP3 is connected to the gas flow passage FP1 on the further toward exhaust downstream side than the rotor blade 102, from among the plurality of stages of the rotor blades 102, that is closest to the inlet port 101 in the exhaust portion 114.

The utility model belongs to centrifugal fan technical field especially for low noise centrifugal fan. Including support frame, the upper end surface of support frame is provided with centrifugal fan body, servo motor, servo motor is butt -joint through drive shaft and centrifugal fan blade in centrifugal fan body, be provided with intermittent oiling lubricating component on centrifugal fan body, intermittent oiling lubricating component is located the top of drive shaft, intermittent oiling lubricating component is used for lubricating servo motor and drive shaft junction place. The utility model discloses the setting of intermittent oiling lubricating component can intermittently oiling lubricating servo motor and drive shaft junction place, to this reduces the friction between drive shaft and servo motor upper limit part, like this not only can reduce the loss of electric energy when the device uses, thereby plays the role of energy -conserving, and can also reduce the noise generated by the friction between drive shaft and servo motor upper limit part.

This application provides a two-stage air-float air compressor cooling system, belonging to the field of air compressor technology. It includes a main shaft, stator, housing, and cooling channels. The stator, housing, and main shaft are integrated, enabling better heat conduction and thus helping the air compressor dissipate heat. This also reduces the overall size and weight of the air compressor, facilitating its miniaturization. The cooling channels are used to cool the housing. By placing the inlet and outlet of the cooling channels at the same end of the housing, the cooling medium can flow back and forth within the housing, forming a circulating cooling loop in the water-cooling channel. This makes the temperature of the cooling medium more uniform during flow, resulting in more uniform cooling of the housing and its internal components. This improves the uniformity of heat dissipation in the air compressor, providing excellent cooling performance and preventing thermal bending deformation of internal components due to uneven heat dissipation and temperature gradients. Effective cooling ensures normal and stable operation of the air compressor and extends its service life.