3271results about "Radial flow pumps" patented technology

The invention relates to the technical field of multi-stage centrifugal pumps, and discloses an axial balance assembly which comprises a balance shaft sleeve, a pump shaft and a high-pressure throttling ring connected to a water inlet and outlet section, the balance shaft sleeve is connected to the pump shaft and arranged on the periphery of the pump shaft in a sleeving mode, and the high-pressure throttling ring is arranged on the periphery of the balance shaft sleeve in a sleeving mode. The high-pressure throttling ring and the periphery of the balance shaft sleeve are limited to form a flow blocking cavity, the flow blocking cavity is provided with a high-pressure flow blocking inlet and a high-pressure flow blocking outlet, the high-pressure flow blocking inlet and the high-pressure flow blocking outlet are oppositely arranged at the two ends of the flow blocking cavity in the axial direction of the balance shaft sleeve, and the high-pressure throttling ring is provided with a high-pressure ring end face. The balance shaft sleeve is provided with a high-pressure shaft end face, and the high-pressure choke flow inlet is located between the high-pressure ring end face and the high-pressure shaft end face. According to the axial balance assembly, generation of residual axial force from the high-pressure section to the low-pressure section is reduced, the service life of the water pump is prolonged, and the operation reliability of the water pump 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.

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.

The utility model discloses a heat management system based on an air floatation centrifugal compressor and a machine room. The heat management system comprises the air floatation centrifugal compressor, an evaporator, a condenser and a throttling element. An air inlet of the air flotation centrifugal compressor communicates with an outlet of the evaporator, a liquid cooling module is arranged in the air flotation centrifugal compressor to cool a motor of the air flotation centrifugal compressor, an inlet of the liquid cooling module is connected to an outlet of the condenser through a first control valve, and an outlet of the liquid cooling module is connected to an inlet of the evaporator. The evaporator is arranged at the to-be-cooled device to absorb heat emitted by the to-be-cooled device. An inlet of the condenser communicates with an exhaust port of the air flotation centrifugal compressor, and the throttling element is arranged at an inlet of the evaporator and used for conducting throttling expansion on the cooled refrigerant. The heat management system is applied to the machine room, an oil separator and corresponding pipelines are omitted, the overall structure is simple, and meanwhile the heat dissipation efficiency can be improved.

The centrifugal compressor provided by the application comprises an impeller, a diffuser and a backflow device. The diffuser comprises a cover plate and a partition plate. The cover plate is installed on the backflow device and forms a containing cavity with the backflow device. The partition plate is accommodated in the containing cavity and divides the containing cavity into a supply air passage communicated with an air inlet. The supply air passage comprises a diffuser passage, a reversing passage and a backflow passage. The reversing passage has opposite first and second side walls. The first side wall is arranged on the inner side wall of the cover plate, and the second side wall is arranged on the outer side wall of the partition plate. The first side wall comprises a first arc surface, a second arc surface and a first plane arranged between the first arc surface and the second arc surface. The second side wall comprises a third arc surface and a fourth arc surface. According to the scheme, the gas in the diffuser passage is smoothly transitioned into the backflow passage, and the loss of gas flow from the diffuser passage into the backflow passage is avoided.

The invention relates to the technical field of multi-stage horizontal centrifugal pumps, and discloses a multi-stage horizontal centrifugal pump which comprises a driving motor, an output end of the driving motor is fixedly connected with one end of a pump shaft, the other end of the pump shaft is fixedly connected with a multi-stage centrifugal pump component, a positioning mechanism is further arranged on the pump shaft, and the positioning mechanism is rotationally connected with the pump shaft; the balance mechanism comprises a driven part and a hydraulic part, the driven part is located between the positioning mechanism and the driving motor, one end of the driven part is connected with the pump shaft in a matched mode, and the other end of the driven part is fixedly connected with the hydraulic part; the feedback mechanism comprises a thrust component, an amplifying component and a sealing component, the thrust component is located between the positioning mechanism and the multistage centrifugal pump component, the thrust component is connected with the amplifying component in a matched mode through the sealing component, the amplifying component is rotationally connected with the hydraulic component, and the thrust component communicates with the hydraulic component through a pipeline. According to the invention, the adaptability under various working conditions is improved, and the pump shaft movement phenomenon is reduced.

The invention discloses an impeller and a compressor. The impeller comprises a wheel disc, a wheel cover and a plurality of blades, the blades are connected with the wheel disc and the wheel cover, the wheel disc, the wheel cover and two adjacent blades define an airflow channel, a first inlet is formed in the airflow channel, a plurality of through holes are formed in the wheel cover, and the airflow channel and the first inlet are communicated through the through holes. According to the impeller, the through hole is formed in the impeller cover of the impeller so that the first inlet can communicate with the airflow channel, when the actual flow of the centrifugal compressor is too large or too small, the through hole can balance the air pressure in the airflow channel and the air pressure at the first inlet, and therefore the blocking or surging phenomenon is avoided; and damage to the compressor and connected equipment is avoided.

The invention relates to the technical field of pumps, and discloses a reliable double-shell self-balancing multi-stage centrifugal pump, a low-pressure section is provided with a medium inlet and an inducer chamber, the two ends of the inducer chamber communicate with the medium inlet and a fluid cavity correspondingly, and an inducer connected to a pump shaft is arranged in the inducer chamber; the pump shaft sleeve is provided with a throttling ring, the throttling ring is located at the end, away from the low-pressure section, of the high-pressure section, drainage threads are arranged on the periphery of the throttling ring, a throttling channel is defined between the drainage threads and the high-pressure section, the mechanical seal base is provided with a pressure relief channel, one end of the throttling channel is communicated with the fluid cavity, and the other end of the throttling channel is communicated with the pressure relief channel. And the pressure relief channel is communicated with the inducer chamber through a pressure relief pipe. According to the reliable double-shell self-balancing multi-stage centrifugal pump, the throttling ring is driven by the pump shaft to rotate, the inlet pressure is effectively increased, cavitation is prevented, the throttling channel has the pressure relief effect on the high-pressure section, the impact load of a high-pressure medium on the pump shaft, the bearing and the bearing box is relieved, the operation stability of the pump is improved, and the service life of the pump is prolonged.

Systems and methods are disclosed herein for simultaneously milling an obstructions and collecting the resulting debris within a wellbore in an oil-and-gas setting. An example debris collection tool can include a motor, centrifugal pump, gear boxes, bailers, and a pass-through milling bit. A series of shafts can pass through the internal components of the tool and cause various components to rotate when driven by the motor. The gear boxes can lower the speed and increase the torque of rotating downhole components. The tool therefore can simultaneously drive the pump and milling bit at different speeds and torques. The centrifugal pump can include a flow control mechanism at allows the tool to control the flow of drilling fluid from the centrifugal pump into the surrounding subsurface.

A fan assembly has a substantially centrifugal outlet, an axial intake, an airflow channel extending substantially perpendicular to the axial intake, and a guide element for redirecting airflow adjacent the axial intake. The axial intake is spaced apart from a back wall of the airflow channel by a first distance, and the guide element is positioned between the axial intake and the back wall of the airflow channel, or the guide element comprises a back surface of the fan assembly. The airflow from the airflow channel then passes through the guide element to enter the axial intake.

Embodiments of the present disclosure provides a respiratory ventilation apparatus including: a main body configured to generate a high pressure gas above atmospheric pressure. The main body may include a noise reduction device, the noise reduction device being configured to reduce a noise generated during an operation of the main body. The noise reduction device may include a gas inlet structure, a noise reduction housing, a blower cavity, and a gas channel. A gas may enter the gas channel through the gas inlet structure. The gas channel may be formed between a sidewall of the noise reduction housing and a sidewall of the blower cavity, and the gas channel may be configured to transfer the gas. The blower cavity may be disposed with at least one cavity gas inlet along a gasflow direction. The gas in the gas channel may enters the blower cavity through the cavity gas inlet.

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).

A fluid pump includes a pump casing, an impeller arranged in the pump casing and a motor for driving the impeller to rotate in the pump casing. The pump casing includes a sleeve arranged therein and dividing an internal space of the pump casing into a first space and a second space. The motor includes a stator, and a rotor fixedly connected to the impeller through a rotating shaft. The rotor, the rotating shaft and the impeller are movably arranged in the first space, and the stator is fixedly arranged in the second space. A first bearing assembly and a second bearing assembly are respectively arranged at two ends of the rotating shaft. The second bearing assembly is positioned at one end of the sleeve far away from the impeller and fixedly connected to the sleeve by a fixing member.

An energy dissipation system for a vehicle, the energy dissipation system comprising an air compressor comprising a compressor inlet configured to receive ambient air, an electric motor comprising a rotor having a rotor shaft operatively connected to a compressor shaft of the air compressor, power electronics arranged in a power electronics housing, the power electronics being electrically connected to the electric motor and configured to feed electric power to the electric motor, and an air flow channel through which the ambient air is configured to be fed to the compressor inlet, the air flow channel being formed by an inner elongated tube member and an outer elongated tube member, wherein the electric motor is housed within the inner elongated tube member and attached to a first inner surface, and wherein the power electronics housing is attached to a second outer surface.

The invention discloses a runner rotary vane mechanism for a fluid machine and an engine. The runner rotary vane mechanism comprises a differential control device, a runner, a left impeller set and a right impeller set. A plurality of inner transmission shafts and an outer transmission shaft of the differential control device are concentrically arranged in a sleeved mode. The rotating wheel is installed in a cylinder body of the stator, and a left separation blade and a right separation blade are arranged on the two sides of a wheel disc of the rotating wheel respectively. The cylinder body is divided into a left cylinder and a right cylinder by the rotating wheel, and a plurality of left blades of the left impeller group are arranged in the left cylinder; and a plurality of right blades of the right impeller group are arranged in the right air cylinder. And the rotating wheel rotates under the control of the differential control device so as to carry out two-stage fluid conveying work.

The utility model belongs to the technical field of centrifugal fans, and discloses a multi-wing centrifugal impeller and a multi-wing centrifugal fan, the multi-wing centrifugal impeller comprises an impeller disc, a plurality of blades and an impeller circular ring, the impeller disc and the impeller circular ring are connected to the two ends of the plurality of blades, each blade extends towards the circle center of the impeller disc, and the impeller circular ring is connected with the impeller disc. Each blade is provided with a front end and a rear end which are arranged at intervals in the radial direction of the impeller disc and a pressure face and a suction face which are arranged at intervals in the circumferential direction of the impeller disc, the front ends are arranged close to the circle center of the impeller disc, and sand dune type protrusions protruding towards the suction face are formed on the portions, close to the front ends, of the blades. The flow field uniformity and stability of the multi-wing centrifugal impeller are high, the flow channel shrinkage coefficient of the impeller is increased, and therefore the problem that the aerodynamic performance is poor when inlet impact loss and blade tail edge separation loss of airflow of an existing multi-wing centrifugal fan are large is solved.

The invention relates to the technical field of gas machinery, and discloses a pressurizing energy-saving centrifugal fan which comprises a limiting ring, a driving motor is fixedly connected into the limiting ring, an impeller frame is fixedly arranged at the output end of the driving motor, and fan blades are arranged in the impeller frame. A protection assembly and a transmission assembly are arranged on the outer wall of the impeller frame, a friction plate is fixedly connected to the outer wall of the transmission assembly, a circular gear is arranged on the outer wall of the friction plate, an annular rack is connected to the tooth end of the circular gear in a meshed mode, and a connecting frame is fixedly connected to the outer wall of the annular rack. Through the linkage design that a driving motor drives an impeller frame to be in linkage with a first bevel gear and a second bevel gear, in combination with mechanical transmission of a friction plate, a circular gear and an annular rack, automatic adjustment of the size of an air inlet of an air inlet pipe is achieved, opening and closing of a flow guide plate can be adjusted in real time according to the rotating speed of an impeller, the air inlet amount and air pressure are optimized, and turbulence losses are effectively reduced; and the working efficiency and performance of the fan are improved.

An electric submersible pump stage optimized for viscous fluid is provided. The stage can include a diffuser having a curved break water area. The stage can include an impeller having a cut back shroud and / or hub.

The invention discloses a magnetic suspension vacuum pump, and relates to the technical field of vacuum pumps. The magnetic suspension vacuum pump comprises a shell, and an impeller, a front bearing seat, a front radial magnetic bearing, a stator, a rear radial magnetic bearing, an axial magnetic bearing and a rotor which are sequentially assembled in the shell, and further comprises a spacer ring, the spacer ring is arranged between the front bearing seat and the front radial magnetic bearing, and a gap communicated with the exterior of the shell is reserved between the spacer ring and the front radial magnetic bearing; a first air inlet cavity is formed; the first flow channel comprises a first air inlet cavity, an air gap between the front radial magnetic bearing and the rotor, an air gap between the stator and the rotor and a first air exhaust cavity. The heat exchange devices are arranged at the two ends of the stator, so that the temperature of the cooling gas can be reduced through the heat exchange devices before the cooling gas passes through the stator, and the problem of local heat accumulation caused by continuous temperature rise in the flowing process of the cooling gas in the shell is avoided.

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 neck fan includes a neck fan main body and fan blade groups. The neck fan main body includes a blowing housing. The blowing housing forms an accommodating cavity, an air inlet and an air outlet. The fan blade groups arranged in the accommodating cavities. Each fan blade group includes a base plate, a first centrifugal vane wheel, and a second centrifugal vane wheel. The second centrifugal vane wheel is arranged around a periphery of the first centrifugal vane wheel. Each blowing housing includes a first side, a second side opposite to the first side, a third side and a fourth side. The at least one air inlet is provided in one of the first side and the second side and the other one of the first side and the second side has no air inlet, so that the blowing housing is formed into a single-sided air inlet structure.

There is provided a centrifugal air blower capable of maintaining strength of a case body and having high handleability and reliability even when an exhaust port is provided to a radial-direction side surface of the case body, and securing air volume and static pressure and reducing noise even in a small and flat shape. In an annular air blowing path 4f formed to circle around a case body 4 at a radial-direction outer side by a first case 4a and a second case 4b being assembled together, a radial-direction side surface of the second case 4b is provided with an exhaust port 4m partitioned by a diffuser 4n. The diffuser 4n is formed upright at a bottom plate 4q forming a second air blowing path 4e and is coupled to an annular end part 4r arranged at a radial-direction outer side.

The invention relates to the technical field of cross flow fans, in particular to a dry-type transformer cross flow cooling fan. Comprising a lower shell, an upper shell is arranged at the top of the lower shell, a transverse flow impeller is rotationally installed between the lower shell and the upper shell, air inlets are formed in the front ends of the lower shell and the upper shell, transverse plates are welded to the rear ends of the lower shell and the upper shell, and the two transverse plates are distributed up and down to form an air outlet; an intercepting plate is fixedly connected to the bottom of the inner wall of the upper shell, an air channel is formed in the upper shell, and when airflow passes through the air outlet, part of airflow at the air outlet is intercepted by the intercepting plate, enters the air channel and is exhausted upwards to form an air curtain. By means of the intercepting plate and the air channel, part of air outlet airflow is intercepted to form an air curtain to block hot air backflow, air outlet is concentrated in cooperation with the guide plate of the lower shell, the cooling effect is enhanced, meanwhile, the air inlet opening is increased by means of the adjusting assembly, the air inlet amount is increased, and therefore the problems of hot air circulating suction and low cooling efficiency in the background technology are solved.

To effectively cool a rotor and a stator in an electric motor.SOLUTION: A compressor (10) compresses a refrigerant (W). The compressor includes an electric motor (20), and a compression mechanism (30) to be operated by the electric motor. The compression mechanism comprises an impeller (31) to be rotated by the electric motor. The electric motor comprises a drive shaft (21), a rotor (22) fixed to the drive shaft, and a stator (23) disposed closer to an outer peripheral side (R1) than the rotor. The drive shaft and the rotor include a refrigerant passage (40) through which the refrigerant flows. The refrigerant passage comprises: an axial passage (50) extending in an inner part (21i) of the drive shaft from a first direction side (X1) in an axial direction (X) to a second direction side (X2) opposite to the first direction side, and where the impeller is disposed; and a communication passage (60) making a gap (A) between the rotor and the stator, and the axial passage communication with each other.SELECTED DRAWING: Figure 1

A diagonal fan is disclosed and includes a frame and an impeller. The frame includes an inlet, an outlet, and an accommodation space. The inlet and the outlet are communicated through the accommodation space. The impeller is accommodated within the accommodation space and includes a hub, a cylindrical part, a conical section shell and a plurality of blades, wherein the cylindrical part is configured to accommodate a rotor. The cylindrical part includes a plurality of protrusion portions and a plurality of indentation portions disposed on an inner surface thereof, and the plurality of protrusion portions are abutted against an outer surface of a magnetic shell of the rotor.

The utility model discloses a wind wheel, a draught fan and refrigeration equipment, and belongs to the technical field of wind wheels. The fan blades comprise a plurality of blades, and the blades are arranged on the mounting side of the base in the circumferential direction of the center line of the wind wheel; the ends, close to the center of the wind wheel, of the blades are air inlet ends, and the ends, away from the center of the wind wheel, of the blades are air outlet ends. The inlet angle of each blade ranges from 16 degrees to 20 degrees, and the inlet angle is the included angle between the tangent line of each blade at the air inlet end and the tangent line direction of a circle with the center of the wind wheel as the circle center at the air inlet end. The inlet angles of the blades range from 16 degrees to 20 degrees, so that airflow flows in the wind wheel more smoothly, turbulent flow and vortex are reduced, and flow loss is reduced. The proper inlet angle can guide airflow to stably flow in the wind wheel, so that the risks of disturbance and unstable flowing are reduced, the overall flowing stability of the airflow is improved, the phenomenon of local excessive flow speed or uneven flowing is avoided, the air flowing resistance is reduced, and the operation efficiency of the wind wheel is improved.

The present invention relates to a method of starting a submersible pump used for transferring liquefied gas. The method includes starting a submersible pump (1A) disposed in a suction container (2A) of a pump apparatus (100A) to deliver liquefied gas to a suction container (2B) of a pump apparatus (100B) through a flow-path switching device (5A) in the suction container (2A), passing the liquefied gas through a flow-path switching device (5B) in the suction container (2B) while the liquefied gas bypasses a submersible pump (1B) disposed in the suction container (2B), and then starting the submersible pump (1B).

The invention discloses a safe operation control method for a permanent magnet motor centrifugal pump, and particularly relates to the technical field of operation control of permanent magnet motor driving fluid equipment. Operation state parameters of a permanent magnet motor side and a centrifugal pump side are synchronously collected in the stages of covering starting, steady-state operation and working condition change, a continuous operation state sequence is formed, and a dynamic feature vector is constructed; judging whether an abnormal development stage exists or not, and forming a judgment result when an abnormal development trend exists; constructing and predicting a plurality of control action sequences according to a judgment result, determining an operation interval, and selecting the control action sequences for execution; according to the method, the abnormal development trend is recognized by constructing the dynamic feature vector, the influence of different control actions on the operation state is predicted on the basis, and the control action sequence meeting the operation safety requirement is selected for execution, so that the abnormal recognition accuracy is improved, the control decision risk is reduced, and the operation safety of the permanent magnet motor centrifugal pump is enhanced.

The invention provides a magnetic suspension integrated energy-saving refrigeration compressor, and relates to the technical field of refrigeration equipment, the magnetic suspension integrated energy-saving refrigeration compressor comprises a main body assembly, and the two ends of the main body assembly are in threaded connection with volute assemblies; the two volute assemblies are connected through a gas-liquid circulation assembly, a magnetic suspension motor unit is installed in the main body assembly, an impeller assembly is in driving connection with the interior of the magnetic suspension motor unit, and a magnetic suspension control module and a motor monitoring module are installed on the two side walls of the main body assembly respectively. Full magnetic suspension supporting is adopted, mechanical friction is avoided, energy is saved, consumption is reduced, the service life of a unit is prolonged, and operation noise is reduced. The integrated structure is matched with the sealing piece, gas and liquid leakage is prevented, gas circuit and system circulation is optimized, and the refrigeration energy efficiency is improved. The stable and efficient operation of the compressor is guaranteed through the wear resistance of the impeller and real-time monitoring and regulation of the intelligent module.