1521 results about "Volute" patented technology

A respiratory treatment apparatus configured to provide a flow of breathable gas to a patient, including a breathable air outlet, an outside air inlet, and an pneumatic block module, wherein the pneumatic block module includes: a volute assembly including an inlet air passage, a mount for a blower and an outlet air passage; the blower being mounted in the mount such that an impeller of the blower is in a flow passage connecting the inlet air passage and the outlet air passage; a casing enclosing the volute assembly, wherein air passages within the casing connect air ports on the volute assembly, wherein the inlet air passage of the volute assembly is in fluid communication with the outside air inlet and the outlet air passage of the volute assembly is in fluid communication with the air outlet.

This invention discloses a fan turbine casing inletting wind from two sides including a front cover plate, a back cover plate and a circular middle shell connecting the two, a front air-inlet and a back air-inlet are set on them separately, and the projection of the center of the front one on the plane where the back cover places is coincident with that of the back one characterizing that a curved panel projecting downward is connected between the down edges of the two plates to shield the middle shell, so smoke can be led to the front and back air-inlets smoothly.

The invention relates to an air suspension centrifugal blower which comprises a motor, a motor base, a flow guide opening, an air outlet, turbines and volutes. A rotor is coaxially connected with the left turbine and the right turbine through a rotor mandrel. A left radial bearing component and a right radial bearing component are disposed in a motor shell. Each radial bearing component comprises a radial bearing block, a radial bearing, a journal and a radial bearing gland, wherein the radial bearing is a foil piece type dynamic pressure gas radial bearing. An inner thrust bearing block, an outer thrust bearing block and a thrust plate are disposed on the right side in the motor shell. An inner thrust bearing is disposed between the inner thrust bearing block and the thrust plate. An outer thrust bearing is disposed between the thrust plate and the outer thrust bearing block. The inner thrust bearing and the outer thrust bearing are foil piece type dynamic pressure gas thrust bearings. The air suspension centrifugal blower has the advantages that the foil piece type dynamic pressure gas radial bearing and thrust bearings are used, the blower is good in high-speed stability, high in bearing capacity, good in lubrication performance, high temperature resistant and long in service, no external gas sources are needed, blower efficiency is increased, and energy consumption and noise pollution are reduced.

The invention provides a double-air-inlet centrifugal fan which comprises a volute, double-air-inlet impellers and a motor. The double-air-inlet impellers are arranged on a rotating shaft of the motor and are arranged in the volute. The volute comprises a front cover plate, a rear cover plate and a volute coaming arranged between the front cover plate and the rear cover plate. The positions, aligned with the double-air-inlet impellers, of the front cover plate and the rear cover plate are provided with a front air-inlet channel and a rear air-inlet channel respectively. The volute coaming is provided with an air outlet channel. The position, corresponding to the air outlet channel, of the volute is provided with a volute tongue. The volute tongue comprises a volute tongue curved face, and the volute tongue curved face is located on one side of the air outlet channel and is an inwards-concave and asymmetric curved face. According to the double-air-inlet centrifugal fan, the inwards-concave and asymmetric curved face is adopted for the volute tongue curved face, on one hand, rotating noise can be reduced, on the other hand, a deep tongue form is adopted for the volute tongue contour line close to an impeller front end ring and an impeller rear end ring, a shallow tongue form is adopted for the volute tongue contour line close to an impeller middle disc, so that the problem caused by uneven outlet speed distribution of the impellers can be avoided, and thus air volume and air pressure are increased, and efficiency are improved easily.

The invention discloses a cleaning device of an extractor hood, a control method of the extractor hood and the extractor hood. The cleaning device of the extractor hood comprises a volute, a wind wheel, a water containing box, an oil containing cup, a water inlet pipeline, a water drain pipeline, an oil drain pipeline and a control valve. The water inlet pipeline is used for inletting fluid into a mounting cavity, the water drain pipeline is used for draining the fluid in the mounting cavity, and the control valve is used for controlling on and off states of the water inlet pipeline and the water drain pipeline. The control valve has a first state, a second state and a third state; when the control valve is in the first state, both the water inlet pipeline and the water drain pipeline are disconnected; when the control valve is in the second state, the water inlet pipeline is connected, and the water drain pipeline is disconnected; and when the control valve is in the third state, the water inlet pipeline is disconnected, and the water drain pipeline is connected. According to the cleaning device of the extractor hood, under the premise of guaranteeing normal operation of the extractor hood, the extractor hood can be effectively cleaned.

The invention discloses a double-volute hydraulic design method based on an RSM model. The design method comprises the steps of 1) solving double-volute initial hydraulic geometric parameters based on a velocity coefficient method; 2) performing optimization solving on double-volute key geometric parameters by adopting an RSM-based adaptive sequence algorithm; 3) performing parameterization automatic modeling based on a CATIA macroprogram, and outputting to obtain a three-dimensional double-volute model; 4) by adopting a GridPro script file to output a grid file used for numerical value calculation; 5) automatically completing grid loading and boundary condition setting based on a CFX CCL language drive program to complete calculation of related data, and outputting a calculation result; 6) repeatedly executing the steps 3) to 5) to obtain a double-volute scheme with the minimum total pressure loss coefficient; and 7) taking the data obtained in the steps 1) to 6) as the double-volute design parameters to manufacture a double-volute centrifugal pump. By adoption of the double-volute hydraulic design method, the double-volute hydraulic optimization design can be realized.

The invention discloses a vertical indoor unit. A vertical air conditioner comprises a shell arranged on a body fixing seat. The shell is provided with an air inlet and an air outlet. The air outlet is in a longitudinally-extending strip shape. An evaporator, a volute and volute tongue assembly and an air outlet frame are sequentially arranged between the air inlet and the air outlet. A longitudinally-extending cross-flow wind wheel is arranged in the volute and volute tongue assembly. The air outlet frame is connected between the volute and volute tongue assembly and the air outlet. An air channel communicated with the air inlet and the air outlet is formed by the air outlet frame and the volute and volute tongue assembly. The evaporator, the volute and volute tongue assembly and the position of the body fixing seat are fixed. A drive device is arranged in the shell and drives the air outlet frame to do reciprocating rotation around a longitudinally-extending rotating axis. The vertical air conditioner further comprises a movable door device used for exposing out of the air outlet and sealing the air outlet. The effect that the swing air guide coverage area is larger is achieved.

An indoor unit of an air conditioner with a vertical air channel comprises a vertically arranged volute, a tubular air wheel, a volute tongue, a heat exchanger and an indoor unit air outlet formed between the volute and the volute tongue, wherein the shape of the cross section of an indoor unit air channel system takes a right triangle-like structure or a trapezoid-like structure; the indoor unit air channel system consists of the volute, the tubular air wheel, the volute tongue and the heat exchanger; the outlet edge of the indoor unit air outlet is a right-angled edge of the triangle or the trapezoid; the back surface of the volute is another right-angled edge of the triangle or the trapezoid; the heat exchanger is a transversely bent structure or a straight piece structure; and the outer edges of the heat exchanger are the inclined edges of the triangle or the inclined edges and the short straight edge of the trapezoid. The indoor unit has a compact and simple structure and a smaller size, can be mounted in a hiding manner or can be mounted obviously through being matched with a casing, and can be mounted against a wall by one surface or can be mounted against a corner, so that the mounting application range is wide, the refrigeration and heating utilization rate of the air conditioner is higher, the heating effect of the air conditioner is better, and the indoor unit is maintained and repaired more conveniently.

The invention discloses a range hood with an axial-flow type wind wheel. The range hood comprises a range hood main body, wherein an axial-flow type exhaust component is assembled inside the range hood main body; a plane L on which the gas inlet of the exhaust component is arranged is parallel to a plane P on which the a gas outlet is arranged; the exhaust component comprises a volute; the gas outlet and the gas inlet are correspondingly formed in the upper surface and the lower surface of the volute; a motor is assembled inside the volute; blades are rotationally assembled at the rotor end ofthe motor; the plane M of the central points of the blades is parallel to the plane L and the plane P respectively; the gas inlet is communicated with air inlet groups of the range hood main body through an air flue; the gas outlet is communicated with a smoke discharge channel in the top of the range hood main body; a plurality of air inlet groups are arranged; the air inlet groups comprise cleaned air inlet groups and cooking fume air inlet groups. The range hood with the axial-flow type wind wheel is simple in structure and convenient to mount and dismount; meanwhile, according to air dynamic principle, cooking fume is not introduced into the axial-flow type wind wheel but is discharged directly, then the interior of the wind wheel is kept clean, and the service life of the wind wheelis prolonged.

The invention discloses a method for producing an integral volute pressurization exhaust manifold. The integral volute pressurization exhaust manifold comprises a supercharger turbo shell and an exhaust manifold. The supercharger turbo shell and the exhaust manifold are integrally cast. The integral volute pressurization exhaust manifold is made of an austenitic nodular cast iron QTANi35Si5Cr2 material. According to a product produced by the invention, the supercharger turbo shell and the exhaust manifold are designed into an integral cast; weights of parts are greatly reduced; simultaneously, a flow channel is smooth; and the normal exertion of engine power cannot be influenced by preventing a vortex from locally generated in a gap of combined surfaces in the gas flowing process.

The invention relates to an improved anticorrosive wear-resistant centrifugal pump volute casing, which is characterized in that: a pump casing an all-plastic or plastic-lined pump casing, and a sectioning pump casing is a volute casing which is formed by asymmetrically lateral sectioning and provided with a complete liquid outlet pipe section; an integral wear-resistant inlay is in a shape of a cover or basis which is provided with a liquid outlet hole and not provided with a liquid outlet pipe section and is provided with a through axle hole at the bottom; an involution end surface of a lining in the volute casing does not exceed an involution end surface of the volute casing; and a casting-type hardened combining layer is arranged between the volute casing and the wear-resistant inlay. By adoption of the structure and the lining mode, the lining manufacturing difficulty of ceramics, microcrystal glass and the like which are low in cost and difficult to mold is greatly decreased, the manufacturing cost is reduced, the lining is simple, the two historic difficulties of lining body molding and manufacturing and easiness of crazing of high-brittleness lining body during installation and maintenance are solved with low cost, the comprehensive service life is prolonged by more than one time, the overall cost is higher than that of the original all iron pump casing lining ceramic inlay. The invention creates a precedent that the silicon carbide and microcrystal glass materials which are difficult to mold and machine, high in brittleness and extremely good in abrasive resistance are applied to a wear-resisting lining of a centrifugal pump.

The invention provides a device and a method for testing blade pump backflow vortex cavitation. The device and the method are used for testing the backflow vortex cavitation performance and dynamic characteristics of a blade pump under small flow working conditions. According to the device, the blade pump is fixed to a working table; one pressure pulsation sensor is mounted at an organic glass inlet pipe 1*Ds away from an impeller inlet; a plurality of pressure pulsation sensors are correspondingly mounted in the circumferential direction of a volute flow channel every 45 degrees; a pressure pulsation sensor is mounted at a position 2*Ds away from a pump outlet pipe; and a sensor and a collecting card are sequentially connected in series to a computer system provided with signal acquisition and data processing software. According to the testing method, based on the situation that backflow is generated at the pump impeller inlet, the mainstream flow of a pump inlet and the hydraulic performance of the pump inlet can be affected, the internal pressure pulsation information of the pump is collected in real time through the pressure pulsation sensor, and the internal flow condition ofthe pump during backflow vortex cavitation is combined to accurately identify and judge blade pump backflow vortex cavitation.

The invention discloses a range hood, which comprises a fan frame and a fan system arranged in the fan frame. The fan system comprises a volute and an impeller; a vortex eliminating and noise reducingdevice is arranged in the fan frame; the vortex eliminating and noise reducing device is a cylinder; the vortex eliminating and noise reducing device has windward wall faces located at the bottom, flow guide wall faces located on the side face and an airflow separation wall face located at the top. One ends of the two windward wall faces are connected, and the other ends of the two windward wallfaces extend away from each other; the flow guide wall faces extend upwards in the longitudinal direction from the ends, away from each other, of the windward wall faces; and the airflow separation wall face is connected between the top ends of the two flow guide wall faces. The vortex eliminating and noise reducing device deflects relative to the vertical direction and has an inclination angle theta, and the deflection direction of the vortex eliminating and noise reducing device is opposite to the rotating direction of the impeller. Compared with the prior art, the range hood has the advantages that the deflection of the vortex eliminating and noise reducing device is used for eliminating obvious air inlet vortexes in the fan frame, so that local backflow and vortex kinetic energy loss caused by vortexes are reduced, and noise is reduced.

The invention discloses an air suspension centrifugal blower. The air suspension centrifugal blower comprises a motor, a volute, an impeller, an impeller shaft, bearing rotating shafts, air suspensionradial bearings and air suspension thrust bearings. The front end and the rear end of a motor rotor are rotationally connected with the air suspension radial bearings through the bearing rotating shafts respectively. The bearing rotating shaft located at the front end of the motor is rotationally connected with the air suspension thrust bearing through a thrust disc, PVD coatings are arranged onthe friction faces of the bearing rotating shafts and the thrust disc, the friction coefficient of the PVD coatings is smaller than or equal to 0.1, and the thickness of the PVD coatings ranges from 2micrometers to 8 micrometers. PTFE coatings are arranged on the friction faces of the air suspension radial bearings and the air suspension thrust bearings, the friction coefficient of the PTFE coatings is smaller than or equal to 0.05, and the thickness of the PTFE coatings ranges from 0.02 mm to 0.05 mm. The air suspension centrifugal blower has the advantages of compact structure, high efficiency, long service life, good stability, high start-stop frequency, low motor temperature rise and the like.

The invention discloses an exhaust steam cylinder of a miniature steam turbine, which comprises a volute and a diffuser, wherein the diffuser comprises an inner deflector and an outer deflector; the volute is arranged on the circumference of the diffuser and comprises an upper wall and a side wall; the width of the volute along the axial direction of the exhaust steam cylinder is bigger than that of the diffuser; the outer deflector is connected with the side wall, and the inner deflector is arranged in the volute; inner wall corners at the connecting part of the upper wall and the side wall and the connecting part of the outer deflector and the side wall are both arc-shaped wall corners; the side face of the inner deflector is a side face consisting of first non-uniform rational spline curves; and the side face of the inner deflector consists of second non-uniform rational spline curves. The exhaust steam cylinder of the miniature steam turbine, provided by the invention, can prevent vortex secondary flow from occurring at the wall corners and eliminate the influence of the vortex secondary flow on steam pressure at the final blade cascade outlet of the miniature steam turbine.

The invention relates to a centrifugal fan, and discloses a centrifugal fan, comprising a volute (5), a motor (6) and a wind wheel (1) arranged on the motor (6), the wind wheel (1) includes a base The seat (4) is connected to the wind guide vane (2), and the lower end of the wind guide vane (2) is connected to the base (4), and the upper end of the wind guide vane (2) is fixed by the rim (3). The folded edge of the volute of the present invention cooperates with the seamless connection on the centrifugal wind guide vane, and the folded edge extends into the wind wheel. When the wind wheel rotates at a high speed in the volute, the folded edge extended into the wind wheel can effectively prevent The backflow of gas in the air duct increases the air intake area, and at the same time prevents the air pressure generated by the wind wheel from reacting on the air coming in from the air inlet, offsetting part of the air intake and increasing the air volume.

The invention discloses a turbine, comprising: a motor casing, a volute casing and a working medium pump casing; a stator assembly arranged on the inner wall of the motor casing; a rotor shaft; a front radial permanent magnetic bias magnetic suspension bearing and a rear Radial permanent magnetic bias magnetic suspension bearings, front radial permanent magnetic bias magnetic suspension bearings and rear radial permanent magnetic bias magnetic suspension bearings are arranged on the motor housing to support the rotor shaft; axial permanent magnetic bias magnetic suspension bearings, axial permanent magnetic bias magnetic suspension bearings, The permanent magnetic bias magnetic suspension bearing is set on the motor casing to limit the axial displacement of the rotor shaft; the expansion turbine is located in the turbine working chamber, and the gaseous working medium enters the turbine working chamber from the intake passage, and the expansion turbine is After doing work, it is discharged from the exhaust passage; the centrifugal impeller is arranged at the front end of the rotor shaft of the working medium pump and is located in the third installation space. The turbine according to the invention has simple structure, low cost and high thermoelectric efficiency.

The invention discloses a current collector, which comprises a wind guide surface and a fixed surface, the fixed surface is in the shape of a ring, the wind guide surface includes a radial wind guide surface extending a certain distance in the radial direction from the radial inner side of the fixed surface, and The radial inner side of the radial air guide surface is an axial wind guide surface extending a certain distance in the axial direction. The middle of the air guide surface is formed as an air inlet. The axial wind guide surface has a first end and a second end in the circumferential direction. The axial wind guide surface Between the first end and the second end are a straight first air guide section and an arc-shaped second air guide section respectively, and the first air guide section and the second air guide section form a closed ring. Also disclosed is a centrifugal fan applied with the collector as described above. Cut a straight line across the air inlet of the collector, and the cross-cut part is close to the volute tongue of the volute, so that the air intake at the volute tongue is reduced, and the flow space at the volute tongue is increased, which reduces the bad flow at the volute tongue The oil fume flow, and the increased space increases the buffer space for the impact of the oil fume flow.

The invention relates to an improved centrifugal type wind wheel as well as a volute and a turbine fan assembly. The wind wheel comprises a bottom plate, multiple blades and a stirrup, wherein the multiple blades are distributed on the bottom plate at intervals, the stirrup is connected with the multiple blades, and the multiple blades and the bottom plate form a negative pressure region; the envisaging projection shape of each blade is a right angle trapezoid, the sloping side of each blade faces to the negative pressure region, the width of the top side of each blade is less than that of the bottom side of each blade, and the connecting part of the top side and the sloping side of each blade is provided with a half-baked groove; the centrifuge wind wheel provided by the invention has the characteristics of large air quantity, small noises, low cost, high energy efficiency and the like as compared with the centrifuge wind wheel in the same specification; and the volute is provided with an edgefold stretching into the half-baked groove of the wind wheel, the volute and the edgefold are connected in a match manner so as to be capable of effectively preventing gas from flowing back to an air inlet, and increase the inlet air area effectively, and meanwhile, the air pressure generated by the wind wheel is prevented from counteraction on the incoming air from the air inlet so as to counteract part of air input. If a motor is same, the diameter and height of the wind wheel and the torsion angle of the blades are same, and an air duct system is same, the air quantity of the centrifugal type wind wheel provided by the invention can be improved by more than 20%.