1481 results about "Volute" patented technology

The invention provides an analysis method and device for flow, efficiency and water consumption rate of a hydraulic power plant generator set. A distributed flow measurement unit based on a domestic PLC controller and a domestic operating system is constructed, and each unit is independently configured with the flow measurement unit to realize decentralization of data acquisition and processing; active power, guide vane opening, water head difference, instantaneous flow and volute inlet pressure data are collected in real time through a distributed flow measurement unit, and a unit efficiency and water consumption rate calculation model is dynamically fitted based on the data; sending an output result of the calculation model to a monitoring system through an anti-interference communication network, wherein the communication network adopts layered wiring and a double-shielded twisted pair to reduce the signal bit error rate; and the IMC integrated management and control platform is used for remote monitoring and diagnosis of the flow measurement unit, and seamless connection with a smart power plant data medium station is realized. The system reliability and the maintenance flexibility are improved, and the autonomous controllable requirements of domestic substitution and intelligent power plants are comprehensively met.

The utility model provides an air pipe type air conditioner, and relates to the technical field of household appliances. The air pipe type air conditioner comprises a shell provided with an air return opening; the volute assembly is located in the shell and comprises a first volute and a second volute, the first volute is provided with a first connecting part, the second volute is provided with a second connecting part, the first connecting part and the second connecting part are matched and fixed to form a matching part, and the matching part is perpendicular to the plane where the air return opening is located so that the matching part can be disassembled through the air return opening. According to the air pipe type air conditioner, the matching part formed by matching the first connecting part of the first volute and the second connecting part of the second volute is perpendicular to the plane where the air return opening is located, and the second connecting part can be pushed and pulled in the direction perpendicular to the plane where the air return opening is located; therefore, the second volute is installed in the shell or separated out of the shell through the air return opening, the structure is simple, operation is convenient, and the disassembly and assembly efficiency is improved.

The invention relates to a compressor and an air compressor system.The compressor comprises a machine shell, an air compressor, an air compressor, an air compressor, an air compressor and an air compressor, the first volute assembly is installed on one side of the machine shell in the axial direction, the first volute assembly is provided with an inner cavity, and a sealing separation part is arranged in the inner cavity; the rotor shaft is rotatably arranged in the accommodating cavity, and part of the rotor shaft is arranged in the inner cavity in a penetrating manner; the first impeller is arranged in the containing cavity and fixedly arranged on the rotor shaft in a sleeving mode. The second impeller is arranged in the containing cavity and fixedly arranged on the rotor shaft in a sleeving mode. Wherein the first impeller and the second impeller are arranged in a back-to-back mode and are in rotary sealing fit with the sealing separation part, the sealing separation part, the first impeller and the second impeller jointly divide the inner cavity into a first compression cavity and a second compression cavity, at least blades of the first impeller are arranged in the first compression cavity, and blades of the second impeller are arranged in the second compression cavity. According to the compressor, the occupied axial space is reduced, and the length of the rotor shaft can be shortened.

The invention discloses a compressor system and a method for realizing stable boundary control of a gas compressor thereof, which can actively adjust parameters B of the system and realize switching of an instability mode of the gas compressor between surging and rotating stall by only depending on an independent, small and adjustable switching section on the premise of not modifying large basic hardware (such as a volute and a pipeline). According to the principle of the compressor system provided by the embodiment of the invention, the effective flow area is changed by adjusting the angle of the turbine guider, so that the stability boundary of an upstream gas compressor or a fan is actively expanded, low-cost and rapid adjustment of the stability of the gas compressor is realized, the research and development efficiency is improved, and the test period is effectively shortened. The compressor system provided by the embodiment of the invention has the characteristic of wide applicability, can be applied to an independent compression system part test environment, and can also be applied to a complex complete machine environment comprising a compression system.

The invention relates to the technical field of auxiliary power, in particular to an air supply device of an auxiliary power system. The device comprises an air inlet duct shell, an air inlet air pocket, an air inlet duct outer ring, an air inlet volute, a labyrinth ring, a locking unit and a rotor. The axial end face of the air inlet air pocket is coaxially connected with the air inlet channel shell in an abutting mode. The air inlet channel outer ring comprises an outer sealing cylinder and an outer extending ring which are coaxially and fixedly connected, and the axial end face of the outer extending ring is coaxially connected with the air inlet air pocket in an abutting mode. The air inlet volute comprises a volute positioning cylinder and a spiral air channel shell which are fixedly connected, and the end face of the air inlet volute coaxially abuts against the outer extending ring. The labyrinth ring is clamped between the air inlet channel outer ring and the air inlet volute, the inner peripheral wall and the outer peripheral wall are attached to the first sealing face and the second sealing face respectively, the radial linear expansion coefficient of the labyrinth ring is larger than that of the first sealing face and that of the second sealing face, the labyrinth ring comprises a ring body and a plurality of pressure reduction gear rings axially arranged at intervals, and a stepped pressure relief cavity is formed between every two adjacent pressure reduction gear rings. In this way, the problem that gas leakage is prone to occurring at the connecting position of the air inlet end shell of the auxiliary power system is solved.

The invention provides a single-stage centrifugal air compressor. An air path cooling system of the single-stage centrifugal air compressor comprises a first cooling air path and a second cooling air path. The first cooling gas path comprises a shell cooling gas channel; an annular channel; a plurality of bearing seat air inlets; the housing cavity is provided with a main air outlet; the bearing seat air outlet hole is communicated between a fit clearance between a first radial air bearing, far away from the volute, of the motor and a motor stator and the housing cavity; the second cooling air path comprises an air inlet gap between the back of the impeller and the end face of the shell close to the impeller, a fit gap between a second radial air bearing of the motor close to the volute and the main shaft, a fit gap between the stator and the main shaft, a fit gap between the stator and the first radial air bearing and a bearing seat air outlet hole which are communicated in sequence; the air inlet gap communicates with the air outlet side of the impeller. The first cooling air path and the second cooling air path can cool rotor parts at different parts of the motor, so that the cooling effect on the rotor parts of the motor is improved, and the use performance of the motor is ensured.

The invention relates to the field of mechanical engineering, in particular to a hydraulic-structure collaborative optimization design method for a shield pump, and aims to solve the problems of load distortion and structure matching imbalance caused by traditional staged optimization. The method comprises the following steps: constructing a fluid-solid bidirectional coupling simulation model, and extracting transient hydraulic loads under multiple working conditions; establishing a structure dynamic response agent model based on modal superposition and Gaussian process regression; key coupling parameters such as the impeller outlet width and the volute base circle diameter are recognized through a Sobol method; and the efficiency, the lift fluctuation rate, the stress and the vibration are taken as multiple targets, and a Pareto optimal solution is searched through an improved genetic algorithm. Manufacturing constraints are embedded in the optimization process, the single period is shorter than 48 hours, and fatigue life evaluation and knowledge base intelligent recommendation are supported. According to the method, closed-loop cooperation of hydraulic excitation and structural response is achieved, the vibration prediction error is lower than 10%, the optimization dimension is compressed to be within 5 dimensions, the efficiency is improved by 20 times or above, and the performance reliability and the design intelligence level of the shield pump are remarkably improved.

The invention relates to the technical field of auxiliary power systems, in particular to a manufacturing method of an air supply device of an auxiliary power system. The method comprises the steps that a high-pressure air pressure distribution area under the working state of an auxiliary power system air supply device is obtained; determining a positioning surface and a sealing surface of the air supply device of the auxiliary power system according to the distribution area; the assembly tolerance of the auxiliary power system air supply device is determined according to the positioning face and the sealing face; an air inlet channel shell, an air inlet air pocket, an air inlet channel outer ring, an air inlet volute, a labyrinth ring, a locking unit and a rotor are machined according to the assembly tolerance; and an auxiliary power system air supply device is assembled, so that the air inlet channel shell, the air inlet air pocket, the air inlet channel outer ring and the air inlet volute sequentially abut against one another in the axial direction, the labyrinth ring is pressed between the outer side ring face of the outer sealing barrel and the inner side ring face of the volute positioning barrel, and a stepped pressure relief cavity is formed between every two adjacent pressure relief ring gears. Therefore, the problem that the air inlet end shell of the auxiliary power system is very difficult to position and seal well is solved.

The utility model provides an obliquely-installed air duct of a mobile air conditioner, which comprises a shell serving as an installation carrier, and the shell is hollow and forms an installation cavity; the volute assembly is obliquely arranged in the mounting cavity, the volute assembly comprises an upper volute assembly and a lower volute assembly located below the upper volute assembly, an upper volute cavity and a lower volute cavity are formed in the upper volute assembly and the lower volute assembly respectively, the upper volute cavity and the lower volute cavity are coaxially arranged, and the axis of the upper volute cavity and the axis of the lower volute cavity incline to the horizontal plane; the side wall of the upper volute cavity is provided with an exhaust channel, the exhaust channel extends upwards, is in butt joint with a first air outlet in the top of the shell and is used for discharging air, an evaporator is arranged on an air inlet path of the upper volute cavity, and a condenser is arranged on an air inlet path of the lower volute cavity. The inclined air duct of the mobile air conditioner is compact in structure, small in size, low in manufacturing cost and use cost, convenient to assemble, high in air outlet speed, long in air supply distance, low in working noise and good in use effect.

The invention discloses an air suspension turbine power generation and refrigeration integrated device which comprises a shell, a stator and a rotor spindle, the rotor spindle is rotationally arranged in the shell through a bearing assembly, the stator is fixed in the shell and is coaxial with the rotor spindle, and an air gap exists between the stator and the rotor spindle to form a permanent magnet synchronous generator. The rotor further comprises a first-stage volute, a second-stage volute, a first-stage radial flow turbine, a second-stage radial flow turbine, a volute connecting pipe and a cooling water jacket, the first-stage volute and the second-stage volute are fixed to the two ends of the shell respectively, and the first-stage radial flow turbine and the second-stage radial flow turbine are coaxially fixed to the two ends of the rotor spindle respectively and are arranged back to back; the first-stage radial flow turbine is located in the first-stage volute, the second-stage radial flow turbine is located in the second-stage volute, the first-stage volute is provided with a high-temperature and high-pressure air inlet and a first-stage air outlet, and the second-stage volute is provided with a second-stage air inlet and an expansion cooling air exhaust port; the device has the advantages of being capable of stably running at a high speed in a high-altitude low-pressure environment and simultaneously achieving efficient power generation and refrigeration functions.

The utility model discloses a straw cleaning device and a returning machine adopting the straw cleaning device, the straw cleaning device comprises one or a plurality of cleaning assemblies arranged in parallel, each cleaning assembly comprises a volute, the volute is fixedly arranged and sleeved outside a first auger, the first auger comprises a shaft rod, the shaft rod is sleeved outside the volute, and the shaft rod is sleeved outside the first auger. A spiral extending blade is arranged on the shaft rod, the volute comprises a cambered surface section, the two ends of the cambered surface section extend outwards to form a first free end and a second free end, the volute and the first auger define a removing cavity, and the first free end and the second free end jointly form a suction inlet with a downward opening. When the first auger rotates under the action of an external driving unit, guiding airflow can be generated on the periphery of the first auger, so that straw enters the clearing cavity through the suction inlet. The field returning machine comprises a machine frame, and a straw smashing unit and a straw cleaning device are sequentially arranged on the machine frame. The straw cleaning device is reasonable in structure and good in straw cleaning effect.

The invention provides a leading pretreatment device for pumping and cleaning clustered marine organisms and floaters, the leading pretreatment device comprises a buoyancy platform, a butt joint structure, a controller and a dispersion assembly, a treatment cabin is arranged in the middle of the buoyancy platform, and the dispersion assembly is composed of a turbulent flow triggering assembly and a liquid spraying assembly; impurities are collected in a suction mode, the device is provided with self-buoyancy and a modular structure and can be rapidly in butt joint with a tail bag of an interception net, the optimal suction posture is achieved, and the core innovation of the device is that a dispersing assembly and a cutting device are sequentially arranged in the suction direction, material distribution is achieved through a rotating cylinder and a conical column, and high-frequency vibration and a reverse micro-impact mechanism are combined; the block mass structure is effectively damaged; by adopting the unique design of the fixed impeller and the rotary volute, an annular liquid curtain is formed when the barrel rotates, so that the winding property and the overall strength of disaster-causing objects can be reduced, the disaster-causing objects are more easily scattered and cut by subsequent components, the subsequent mechanical load is reduced, the problem of blockage of a flow channel is solved, and the energy consumption and the abrasion of equipment are reduced.

The invention discloses a volute, a fan and a range hood, and relates to the technical field of range hoods. The volute comprises a first end plate, a second end plate and a surrounding plate and is arranged between the first end plate and the second end plate, the surrounding plate protrudes outwards relative to the first end plate and the second end plate in the direction opposite to the interior of the volute, and the outward protruding degree of the surrounding plate is gradually increased in the spiral expansion direction of the volute. According to the technical scheme, the coaming is opposite to the interior of the volute and protrudes outwards relative to the first end plate and the second end plate, the non-uniform degree of the speed of airflow impacting the coaming can be reduced, static pressure conversion is more uniform, vortex generation is effectively restrained, the outward protruding degree of the coaming is gradually increased in the spiral expansion direction of the volute, and therefore the vortex generation efficiency is improved. And under the condition that the flow of the fan is not changed, the non-uniform degree of the airflow speed impacting the coaming can be further reduced, and the performance of the fan is improved.

A fan assembly and a gas water heater. The fan assembly comprises: a fan housing (10), the fan housing (10) being provided with a volute air channel (101), and the volute air channel (101) having a volute inlet (1011) and a volute outlet (1012); and a freeze protection device (50), the freeze protection device (50) comprising an air pipe (51) and a blade (52), the air pipe (51) being connected to the fan housing (10) and being communicated with the volute outlet (1012), at least a part of the air pipe (51) being integrally formed with the fan housing (10), and the blade (52) being connected to the air pipe (51) and being configured to be unidirectionally opened in the air outlet direction of the volute air channel (101).

The present application provides a test system and method for throttling and desurge of the exhaust gas of a compressor tester. The test system includes: an exhaust volute assembly; a throttling exhaust device connected to the rear side of the exhaust volute assembly, which has multiple parallel exhaust pipelines, the exhaust pipeline includes an exhaust main pipeline, an exhaust auxiliary pipeline and a desurge pipeline, the exhaust auxiliary pipeline and the desurge pipeline converge on the exhaust main pipeline, and the three pipelines are respectively provided with first to third valves; an exhaust branch pipeline connected to the rear side of the throttling exhaust device, which has at least two parallel branch pipelines, each of which is sequentially provided with a guide assembly, a venturi nozzle and an exhaust silencer assembly, and a fourth valve is provided on one of the branch pipelines, and the fourth valve is located between the venturi nozzle and the exhaust silencer assembly. This test system can improve the adjustment accuracy of the compressor test state and achieve rapid desurge after surge, reduce the test risk caused by a single valve failure, and ensure the safety of the test and equipment.

The utility model discloses a fan and an air duct type air conditioner. The fan comprises a volute. The volute comprises a volute body and a movable inner shell. The volute body is provided with a side air outlet located in the side face and a lower air outlet located in the bottom face. The movable inner shell is arranged on the inner side of the volute body and provided with a ventilation opening. The movable inner shell is rotatably arranged around the axis of the fan relative to the volute body so that the fan can be switched between the side air outlet state and the lower air outlet state. In the side air outlet state, the ventilation opening communicates with the side air outlet to form a side air outlet channel used for supplying cold air. In the lower air outlet state, the ventilation opening communicates with the lower air outlet to form a lower air outlet channel used for supplying hot air. On the plane perpendicular to the axis of the draught fan, the projection of the side air outlet channel forms a side air outlet volute molded line. And the projection of the lower air outlet duct forms a lower air outlet volute molded line. The shape of the side air outlet volute molded line is different from that of the lower air outlet volute molded line. According to the utility model, the working noise of the fan is effectively reduced.

The utility model particularly relates to three-axis linkage synthesis mixing equipment, a mixing reaction method and a method for preparing ferric oxalate. The three-axis linkage synthesis mixing equipment comprises a motor and a gear box, a volute is arranged at the top of the outer barrel, and an air outlet is formed in one side of the volute and used for exhausting air; the three rotating shafts are arranged in the outer cylinder body, each rotating shaft is provided with an inner cylinder body, a plurality of vertically arranged gas-liquid separation plates are uniformly arranged on the upper part of each inner cylinder body along the peripheral side, and a plurality of layers of blades which are parallel to one another and are obliquely arranged are arranged on the lower part of each inner cylinder body along the peripheral side; the bottom of the volute is provided with an opening matched with the inner cylinder with the gas-liquid separation plate in size; the inner cylinders on the three rotating shafts are mutually enclosed to form an inner duct, and the rotating shafts are synchronously driven by a motor to rotate through a gearbox; a plurality of annular separation discs are arranged on the inner wall of the outer cylinder body; and an air inlet is further formed in the peripheral side of the outer cylinder body. The utility model has the advantages that the contact area and the contact time of the solvent and the air are fully increased and prolonged in a weightless state.

The invention provides a rotor structure, a motor and a compressor, the rotor structure comprises a sheath, a permanent magnet, two end shafts, a first ring sleeve and a second ring sleeve are sleeved in the sheath, the permanent magnet is located between the two end shafts, at least part of one end shaft is sleeved with the first ring sleeve, and at least part of the other end shaft is sleeved with the second ring sleeve. A first short shaft is arranged in the first ring sleeve in a sleeved mode, one end shaft is located between the first short shaft and the permanent magnet, a second short shaft is arranged in the second ring sleeve in a sleeved mode, the other end shaft is located between the second short shaft and the permanent magnet, and first gaps are formed between the first short shaft and one end shaft and between the second short shaft and the other end shaft in the axial direction of the permanent magnet. The first ring sleeve and the second ring sleeve are made of negative expansion coefficient materials, and according to the high-speed motor, the technical problem that in the prior art, when a high-speed motor operates in a rated mode, a rotating shaft material is heated to extend, and consequently impact damage exists between an impeller and a volute can be solved.

The invention relates to a centrifugal fan and a range hood. The centrifugal fan comprises a volute and an impeller. A current collector is arranged at the air inlet of the volute; the first disc and the second disc are oppositely arranged in the front-back direction; the blades are connected between the first disc and the second disc and distributed in the circumferential direction, the front edge of at least one blade is provided with a wave-shaped section, and the length H2 of the wave-shaped section in the axis direction of the impeller meets the conditions that 0.8 Dn < = D1 < = Dn, 0.5 < = Hz / Hq < = 2; wherein D1 is the maximum diameter of an inlet of the current collector, Dn is the minimum inner diameter of the impeller, Hz is the axial depth of the impeller, and Hq is the air inlet space depth of the front side or the rear side of the centrifugal fan in the machine shell. A plurality of parameters such as the axial length size of the wave-shaped section, the inlet size of the current collector, the inner diameter of the impeller, the depth direction size of the impeller on the single side and the depth of the air inlet space on the side are subjected to collaborative design synthesis and matching. The invention has the advantages that the pneumatic performance of the machine can be ensured while the airflow noise is obviously reduced.

The invention discloses an efficient low-noise centrifugal fan. The efficient low-noise centrifugal fan comprises an impeller, a volute and a current collector. Core innovative design is adopted for the impeller, the combined strategy of inlet angle changing, thickness changing and blade number optimizing is adopted, the inlet angle of each blade ranges from 20 degrees to 25 degrees, the outlet angle of each blade ranges from 36 degrees to 49 degrees, the thickness of each blade decreases linearly from the inlet end to the outlet end, the number of the blades ranges from 14 to 16, accurate design is conducted on the basis of a deduced thickness and performance correlation formula, and the blade number is optimized. And the airflow impact loss is effectively minimized. Meanwhile, the volute adopts an exponential expansion section (the expansion coefficient k is equal to 1.05-1.08) and is combined with a volute tongue (R is equal to 15-18mm) with a specific circular arc radius, so that the airflow uniformity is remarkably improved, and the backflow noise is reduced. In addition, the inner wall of the volute is covered with a nano-porous sound absorption coating to absorb residual vortex noise. Through the cooperation of the structures, the excellent comprehensive performance that the total pressure efficiency is larger than or equal to 82% and the operation noise is smaller than or equal to 75 dB (A) is finally achieved, and the air conditioner is particularly suitable for the ventilation environment with the high requirements for energy efficiency and silence.

The utility model provides a shell assembly and a ceiling electric appliance with the same, and relates to the technical field of volutes. The shell assembly comprises a shell, the shell is provided with an air duct side plate used for forming an air duct, the shell is provided with an air outlet communicating with the air duct, and the air duct side plate is provided with an opening; the spliced volute is movably connected with the shell, so that the spliced volute is provided with a blocking position where the side, away from the air outlet, of the spliced volute moves to the opening so as to block the opening, and the spliced volute is provided with an avoiding position where the side, close to the air outlet, of the spliced volute moves to the side of the opening; when the spliced volute is located at the blocking position, at least part of the spliced volute protrudes out of the outer side of the opening, and the problem that in the prior art, due to the fact that the size of the volute is limited, the air volume in the volute is small is solved.

This invention discloses a low-noise range hood, including a range hood body and a fan housing mounted on the range hood body. A sound-absorbing volute is fixedly installed inside the fan housing. The sound-absorbing volute includes a volute body and a damping layer on the inner wall of the volute body. Multiple baffles are mounted on the volute body, and these baffles are rotatably connected to the volute body via connecting components. A noise-reducing plate is installed inside the fan housing. An exhaust pipe is connected to the exhaust vent extending from the volute body to the outside of the fan housing. An oil fume filter plate is installed inside the exhaust pipe. This invention discloses a low-noise range hood that reduces noise while also filtering oil fumes.

The utility model discloses an air conditioner which comprises a machine shell assembly, an air duct assembly and a heat exchanger assembly. The machine shell assembly comprises a machine shell. The machine shell comprises a detachable first shell plate. The air duct assembly is arranged in the machine shell and comprises an air duct volute and a fan, the fan is installed on a second volute, the air duct volute comprises a first volute and a second volute which are oppositely arranged in the first direction, the first volute and the second volute are detachably connected, the first volute is installed and fixed to the machine shell assembly, and the second volute is installed and fixed to the machine shell assembly. The second volute is slidably connected with the machine shell assembly and is detachable relative to the machine shell assembly, and the second volute can slide relative to the machine shell assembly and the first volute in the second direction so that the second volute and the draught fan can be taken out of the machine shell or installed into the machine shell. According to the air conditioner provided by the embodiment of the utility model, the second volute and the fan can be conveniently taken out from the shell assembly, the fan can be conveniently maintained and cleaned, and the disassembly difficulty of the air duct assembly is reduced; and the mounting difficulty of the air duct assembly is reduced.

The invention discloses an air conditioner indoor unit, and belongs to the technical field of air conditioners. The air conditioner indoor unit comprises a shell, an impeller, a heat exchanger, a volute and a volute tongue, an air inlet channel is formed between the volute tongue and the shell, and an impeller mounting cavity and an air outlet channel are formed between the volute and the volute tongue; the impeller is arranged at the impeller mounting cavity, the impeller is used for driving airflow to sequentially pass through the air inlet duct and the impeller mounting cavity to form outlet airflow, and the outlet airflow comprises backflow airflow which flows back to the impeller after being shunted at the volute tongue and air outlet airflow flowing to the air outlet duct; the air outlet airflow exchanges heat with the heat exchanger; a gap flow channel is formed in a gap between the volute tongue windward side of the volute tongue and the impeller; the volute tongue is provided with a drainage channel, and the drainage channel is used for guiding a part of backflow airflow to the gap flow channel. According to the air conditioner indoor unit, the pressure resistance of the cross-flow fan can be improved.

The utility model provides a volute assembly, a centrifugal fan and an indoor unit. The volute assembly comprises a fixed volute; a movable volute; a limiting structure is arranged between the movable volute and the fixed volute. According to the volute assembly, the centrifugal fan and the indoor unit, the axial movement of the fixed volute and the axial movement of the movable volute are limited through the limiting structure, the movable volute is prevented from being driven by airflow of the fan blades to generate axial movement, and therefore it is guaranteed that the positions of the movable volute and the fixed volute are relatively reliable; and meanwhile, the limiting structure can seal a gap between the end face of the fixed volute and the end face of the movable volute, so that the working efficiency of the centrifugal fan is improved.

The utility model discloses an outer rotor centrifugal fan which comprises a volute and a motor installed in the volute, and further comprises motor supports, the motor supports are fixed to the volute and located at the two ends of the motor, the two ends of the motor are provided with motor shafts, the motor shafts are connected to the motor supports, and vibration reduction glue is arranged on the combination portions of the motor shafts and the motor supports. The motor in the outer rotor centrifugal fan is provided with the motor shafts on the two sides and is different from a cantilever type structure of a common outer rotor motor, so that the motor is easier to be arranged in the central area of the volute, the stress structure of the motor is balanced, the fluid efficiency of the fan can be improved, and the service life of the motor can be prolonged. The vibration damping glue is arranged at the joint part of the motor shaft and the motor bracket, so that rigid contact between the motor and the motor bracket can be isolated, and conduction of vibration generated in the operation process of the motor and vibration noise caused by the conduction are weakened.

The utility model provides a centrifugal volute feeding cyclone which comprises a body, a plurality of barrels are arranged at the top of the body, and flange plates are fixedly installed on the outer side faces of the barrels. The multiple supporting frames are arranged on the outer side faces of the multiple barrels correspondingly; and the multiple limiting assemblies are arranged on the outer side faces of the multiple supporting frames correspondingly. According to the centrifugal volute feeding cyclone provided by the utility model, the supporting frame, the threaded ring, the rotating ring, the pull rod, the clamping assembly and other structures are matched with one another, so that when the cylinder body is mounted, the cylinder body only needs to be inserted into the inner side surface of the supporting frame, then the bottom of the flange plate is propped against the top of the supporting frame, and the cylinder body is mounted; and then a threaded ring is rotated to drive a rotating ring, a pull rod and a clamping assembly to move downwards, so that the bottom of the clamping assembly is pressed on the top of a flange plate, the effect of limiting and mounting the barrel can be achieved, operation is convenient and rapid, and the mounting efficiency is improved.

The application relates to the technical field of centrifugal pumps, and particularly discloses a high-sealing non-variable-volume pump and components thereof, which comprises a pump shell and an impeller, a water inlet and a water outlet are respectively arranged on the pump shell, the pump shell is in a volute type, the volute type comprises a wide section and a narrow section, and the pump shell further comprises a flow assisting mechanism which comprises a flow distribution port and a flow distribution sleeve arranged on the narrow section of the pump shell, a plurality of liquid inlet holes are arranged in a circular array on the water inlet, and the flow distribution sleeve is covered on the flow distribution port and the liquid inlet hole at two ends respectively. In the application, the flow distribution sleeve guides the fluid into the flow distribution sleeve along the flow distribution port at the narrow section of the volute type with the largest pressure during the operation of the impeller, then the flow distribution sleeve supplements the fluid to the water inlet of the pump shell, and the negative pressure at the water inlet is supplemented to reduce the cavitation and prolong the service life of the centrifugal pump.

The invention relates to the field of centrifugal fan industry, in particular to an efficient material conveying centrifugal fan with a non-axial air inlet, which comprises a volute, an impeller fixedly arranged in the volute and the air inlet fixedly connected with the volute, the air inlet partially extends into the volute, the air inlet and the impeller are non-coaxially arranged, and a gap is arranged between the air inlet and the impeller; the air inlet comprises a connecting part, an air guide section, an air inlet part and an air guide part, the air guide section is fixedly connected with the volute through the connecting part, an inlet of the air guide section forms the air inlet part, and an outlet of the air guide section forms the air guide part; the air guide section is of an oblique cylinder structure. According to the efficient material conveying centrifugal fan with the non-axial air inlet, the design of the non-axial air inlet, the impeller without a front disc and a matched volute molded line is adopted, and the problem that in the prior art, due to material blockage such as bayonet overstock during feeding and conveying of a material conveying centrifugal fan, the material conveying efficiency is low is solved.

The invention relates to the field of centrifugal fan industry, in particular to a dust discharge centrifugal fan with a three-dimensional flow impeller, which comprises a volute, an impeller and a current collector, the current collector is fixedly connected with the volute, one part of the impeller extends into the volute, and the other part of the impeller extends into the current collector; the impeller comprises a rear disc and a hub, the rear disc is provided with a central cone of a circular truncated cone structure, the rear disc is fixedly installed on the hub through the central cone, a plurality of blades are arranged on the rear disc in a surrounding array mode, each blade is of a single-plate backward-inclining arc-shaped structure, and an impeller channel is formed between every two adjacent blades. The central cone and the hub are coaxially arranged, and the diameter of the central cone is gradually increased in the direction from the position away from the rear disc to the position close to the rear disc. Through the design of the three-dimensional flow impeller, the fan has a better static pressure ratio and a wider efficient dust removal working condition range, the better static pressure ratio facilitates dust removal so as to reduce accumulation of dust on the impeller, and meanwhile, the fan has lower noise when working.