CN115370595A - Bilateral self-suction cooling double-impeller air-floatation high-speed direct-drive centrifugal blower and working method - Google Patents

Bilateral self-suction cooling double-impeller air-floatation high-speed direct-drive centrifugal blower and working method Download PDF

Info

Publication number
CN115370595A
CN115370595A CN202110542530.9A CN202110542530A CN115370595A CN 115370595 A CN115370595 A CN 115370595A CN 202110542530 A CN202110542530 A CN 202110542530A CN 115370595 A CN115370595 A CN 115370595A
Authority
CN
China
Prior art keywords
suction
air
permanent magnet
impeller
pipeline
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110542530.9A
Other languages
Chinese (zh)
Inventor
不公告发明人
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Jizhi Power Technology Co ltd
Original Assignee
Nanjing Jizhi Power Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing Jizhi Power Technology Co ltd filed Critical Nanjing Jizhi Power Technology Co ltd
Priority to CN202110542530.9A priority Critical patent/CN115370595A/en
Publication of CN115370595A publication Critical patent/CN115370595A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F04D17/162—Double suction pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/057—Bearings hydrostatic; hydrodynamic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
    • F04D29/584—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling or heating the machine
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft

Abstract

The invention discloses a bilateral self-absorption cooling double-impeller air-flotation high-speed direct-drive centrifugal blower and a working method thereof, wherein a high-speed impeller with the same blade type is adopted on both sides of the blower to replace a high-specific-speed impeller, so that the designed speed is ensured to be within the safe speed range of an air-flotation bearing and the high-efficiency compression of main flow is met, the design and cooling scheme design of a high-speed synchronous permanent magnet motor is developed on the basis, the cooling efficiency of a rotor and a stator of the high-speed direct-drive motor is increased by utilizing the vacuum suction force generated when two main flow centrifugal impellers run at high speed and through a channel structure formed by an air inlet pipeline, a suction pipeline, a cold air outlet annular cavity of the motor and a suction annular cavity, the flow speed and the flow rate of cold air between the rotor and the stator of the high-speed direct-drive motor are improved to the maximum extent, the cooling efficiency of the rotor and the stator of the high-speed direct-drive motor is increased, the centrifugal impeller of the motor is not required to be increased, the processing cost, the axial length of a main shaft and the heat dissipation power consumption of the motor are reduced, and the overall safety and the level of the equipment are improved.

Description

Bilateral self-suction cooling double-impeller air-floatation high-speed direct-drive centrifugal blower and working method
Technical Field
The invention relates to the technical field of air floatation air compression and conveying, in particular to a bilateral self-suction cooling double-impeller air floatation high-speed direct-drive centrifugal blower and a working method.
Background
The power consumption of equipment such as a blower, a compressor, a pump and the like accounts for about one third of the annual generated energy, the energy efficiency of the equipment is improved by adopting a new technology, and the power consumption expenditure and carbon emission indexes of enterprises are directly reduced. In the existing blower with the power level of 200kW or above, the air floatation direct-drive blower has the advantages of high efficiency and oil-free lubrication, and becomes a better alternative for replacing the traditional Roots blower which is widely applied.
Meanwhile, the air-flotation direct-drive blower with a larger power level has the problem that the heat dissipation of the high-speed direct-drive motor is not smooth after long-time operation; meanwhile, due to the increase of flow, if the design scheme of a single centrifugal impeller with a large specific rotating speed is adopted, the rotating speed of the impeller is too low, and the air bearing is extremely easy to damage. The two factors bring huge risks to the research, development, design and operation safety of the air floatation blower equipment with the power level of 200kW and above, and the use of the high-efficiency air floatation blower equipment is greatly limited.
As the heat dissipation technology and the design technology of the high specific speed centrifugal impeller of the air-floating direct-drive blower are not mature, the over 200kW medium and high power grade air-floating direct-drive centrifugal blower has serious economic loss caused by the overheat burning of a high-speed direct-drive motor or the axle seizure accident of an air-floating bearing. At present, no effective technical scheme for solving the problems is available.
Disclosure of Invention
The present invention aims at providing one kind of double-side self-sucking cooling double-impeller air floating high speed direct driving centrifugal blower and its operation process.
The invention realizes the purpose through the following technical scheme:
a bilateral self-suction cooling double-impeller air-flotation high-speed direct-drive centrifugal blower comprises a first air inlet pipeline 1, a first centrifugal impeller 2, a first exhaust volute 3, a permanent magnet synchronous motor spindle 4, an air-flotation thrust disc 5, a first air-flotation radial bearing 6, a second air-flotation radial bearing 7, a motor air-cooling inlet annular cavity 18, a first suction pipeline 15, a stator iron core 10, a stator winding 11, a fixed structure 12, a permanent magnet synchronous motor shell 13, a motor air-cooling outlet annular cavity 14, a first suction annular cavity 16, a second air inlet pipeline 9, a second centrifugal impeller 8, a second exhaust volute 17, a second suction pipeline 20 and a second suction annular cavity 19, wherein the first centrifugal impeller 2, the air-flotation thrust disc 5 and the second centrifugal impeller 8 are sequentially fixed on the permanent magnet synchronous motor spindle 4, radial bearing supports of the permanent magnet synchronous motor spindle 4 are respectively supported by the first air-flotation radial bearing 6 and the second air-flotation radial bearing 7, one end of the first air inlet pipeline 1 is connected with the first exhaust volute 3 through an external pipeline of the first centrifugal impeller 2, the second centrifugal impeller thrust disc 5 and the second centrifugal impeller 8 are connected with the stator air-cooling annular cavity, one end of the stator air-suction annular cavity 14 is connected with the stator inlet cavity of the stator synchronous motor shell 14, the stator air-cooling annular cavity 14, the stator core 10 is fixed on the permanent magnet synchronous motor shell 13 through a fixing structure 12, and the central line of the main shaft of the permanent magnet synchronous motor main shaft 4 is superposed with the central lines of the stator core 10 and the stator winding 11.
The flow cross section area of the first suction ring cavity 16 is gradually increased from the inlet to the outlet, the flow cross section area of the outlet is 3 times or more than that of the outlet, the inner surface of the first suction ring cavity 16 is in smooth gradual transition with the outlet surface of the first suction pipeline 15 and the side surface of the first air inlet pipeline 1 respectively, and the curvature radius is larger than 10 cm.
The flow cross-sectional area of the second suction ring cavity 19 gradually increases from the inlet to the outlet, the flow cross-sectional area of the outlet is 3 times or more than that of the outlet, the inner surface of the second suction ring cavity 19 is in smooth gradual transition with the outlet surface of the second suction pipeline 20 and the side surface of the second air inlet pipeline 9 respectively, and the curvature radius is larger than 10 cm.
The first air-floatation radial bearing 6 and the second air-floatation radial bearing 7 are dynamic pressure air suspension bearings, and the rotating speed is 1.6-12 ten thousand revolutions per minute.
The permanent magnet synchronous motor spindle 4 is composed of a spindle supporting section, a permanent magnet and a high-temperature alloy sheath, and the high-temperature alloy sheath is located on the outer side of the permanent magnet.
The working process of the main flow working medium of the bilateral self-priming cooling double-impeller air-flotation high-speed direct-drive centrifugal blower is that the main flow working medium is divided into two parts of fluid with equal mass flow, the first part of fluid enters the first centrifugal impeller 2 through the first air inlet pipeline 1, is discharged from the outlet of the first exhaust volute 3 after the pressure is raised by the first centrifugal impeller 2, is converged with the second part of fluid to enter the equipment main exhaust pipeline, the second part of fluid enters the second centrifugal impeller 8 through the second air inlet pipeline 19, is discharged from the outlet of the second exhaust volute 17 after the pressure is raised by the second centrifugal impeller 8, and is converged with the first part of fluid to enter the equipment main exhaust pipeline.
The working process of the cooling gas of the permanent magnet synchronous motor of the bilateral self-absorption cooling double-impeller air-flotation high-speed direct-drive centrifugal blower is that under the suction effect generated by the high-speed rotation of the first centrifugal impeller 2 and the second centrifugal impeller 8, the cooling gas of the permanent magnet synchronous motor enters the inner cavity of the shell 13 of the permanent magnet synchronous motor from the cold air inlet annular cavity 18 of the motor, the heat generated during the working of the permanent magnet synchronous motor is taken away through the gap between the spindle 4 of the permanent magnet synchronous motor, the stator iron core 10 and the stator winding 11 and the shell 13 of the permanent magnet synchronous motor, the cooling gas flows through the cold air outlet annular cavity 14 of the motor and then is divided into two parts of cooling fluid, the first part of cooling fluid sequentially passes through the first suction pipeline 15 and the first suction annular cavity 16 and then enters the first air inlet pipeline 1, then the first part of cooling fluid of the main flow is converged, and the second part of cooling fluid sequentially passes through the second suction pipeline 20 and the second suction annular cavity 19 and then enters the second air inlet pipeline 9 and then converges the second part of the main flow.
The invention has the beneficial effects that:
the invention provides a bilateral self-suction cooling double-impeller air-flotation high-speed direct-drive centrifugal blower with low manufacturing cost and high operability and a working method. The invention divides the main flow into two parts, designs two identical high-speed impellers to replace one high-specific-speed impeller in the original design scheme, ensures that the designed speed is in the safe speed range of the air bearing and meets the high-efficiency compression of the main flow, and develops the design of the high-speed synchronous permanent magnet motor design and the motor cooling scheme on the basis. The air floatation direct-drive centrifugal blower heat dissipation device can effectively take away heat generated by a motor in the long-time running process of the air floatation direct-drive centrifugal blower, and prevents the air floatation direct-drive centrifugal blower from being burnt out. In addition, the flow loss can be reduced by gradually increasing the flow cross-sectional area of the suction ring cavity from the inlet to the outlet and by smoothly and gradually changing the inner surface of the suction ring cavity, the surface of the outlet of the suction pipeline and the side surface of the air inlet pipeline respectively, so that the suction effect on cold air is enhanced; the invention adopts the dynamic pressure air suspension bearing, reduces the friction loss in the operation process of the equipment to the maximum extent, and does not increase an air supply device; the permanent magnet synchronous motor spindle fixes and protects the permanent magnet through the high-temperature alloy sheath, so that the safety of equipment is improved.
Drawings
FIG. 1 is a schematic view of a bilateral self-suction cooling double-impeller air-float high-speed direct-drive centrifugal blower of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
as shown in FIG. 1, the double-sided self-absorption cooling double-impeller air-flotation high-speed direct-drive centrifugal blower comprises a first air inlet pipeline 1, a first centrifugal impeller 2, a first exhaust volute 3, a permanent magnet synchronous motor spindle 4, an air-flotation thrust disc 5, a first air-flotation radial bearing 6, a second air-flotation radial bearing 7, a motor cold air inlet annular cavity 18, a first suction pipeline 15, a stator core 10, a stator winding 11, a fixed structure 12, a permanent magnet synchronous motor housing 13, a motor cold air outlet annular cavity 14, a first suction annular cavity 16, a second air inlet pipeline 9, a second centrifugal impeller 8, a second exhaust volute 17, a second suction pipeline 20 and a second suction annular cavity 19, wherein the first air-cooling centrifugal impeller 2, the air-flotation thrust disc 5 and the second centrifugal impeller 8 are sequentially fixed on the permanent magnet synchronous motor spindle 4, radial bearing supports of the permanent magnet synchronous motor spindle 4 are respectively supported by the first air-flotation radial bearing 6 and the second air-flotation radial bearing 7, one end of the first air inlet pipeline 1 is connected with the first exhaust volute 3 through an external pipeline of the first air-cooling impeller 2, the second centrifugal impeller 8 is connected with a stator winding of the permanent magnet synchronous motor, the stator inlet annular cavity 14 is connected with the stator winding 14, the stator inlet of the second air-flotation radial bearing 14, the stator synchronous motor housing 14 is connected with the stator synchronous motor housing 14, the stator core 10 is fixed on a permanent magnet synchronous motor shell 13 through a fixing structure 12, and the central line of a main shaft of a permanent magnet synchronous motor main shaft 4 is superposed with the central lines of the stator core 10 and the stator winding 11.
As a preferred embodiment of the present invention, the flow cross-sectional area of the first suction ring cavity 16 gradually increases from the inlet to the outlet, the outlet flow cross-sectional area is 3 times or more of the outlet flow cross-sectional area, the inner surface of the first suction ring cavity 16 is in smooth gradual transition with the outlet surface of the first suction pipeline 15 and the side surface of the first air inlet pipeline 1, respectively, and the curvature radius is greater than 10 cm.
As a preferred embodiment of the present invention, the flow cross-sectional area of the second suction ring cavity 19 gradually increases from the inlet to the outlet, the outlet flow cross-sectional area is 3 times or more of the outlet flow cross-sectional area, the inner surface of the second suction ring cavity 19 is in smooth gradual transition with the outlet surface of the second suction pipeline 20 and the side surface of the second air inlet pipeline 9, respectively, and the curvature radius is greater than 10 cm.
In a preferred embodiment of the present invention, the first air-bearing radial bearing 6 and the second air-bearing radial bearing 7 are hydrodynamic air-bearing bearings, and the rotation speed is 1.6 to 12 ten thousand revolutions per minute.
As a preferred embodiment of the present invention, the permanent magnet synchronous motor spindle 4 is composed of a spindle support section, a permanent magnet, and a high temperature alloy sheath, and the high temperature alloy sheath is located outside the permanent magnet.
The working process of the main flow working medium means that the main flow working medium is divided into two parts of fluid with equal mass flow, the first part of fluid enters the first centrifugal impeller 2 through the first air inlet pipeline 1, is discharged from the outlet of the first exhaust volute 3 after the pressure is increased by the first centrifugal impeller 2, is converged with the second part of fluid to enter the equipment main exhaust pipeline, the second part of fluid enters the second centrifugal impeller 8 through the second air inlet pipeline 19, is discharged from the outlet of the second exhaust volute 17 after the pressure is increased by the second centrifugal impeller 8, and is converged with the first part of fluid to enter the equipment main exhaust pipeline.
The working process of the cooling gas of the permanent magnet synchronous motor refers to that under the suction effect generated by high-speed rotation of the first centrifugal impeller 2 and the second centrifugal impeller 8, the cooling gas of the permanent magnet synchronous motor enters a chamber inside a shell 13 of the permanent magnet synchronous motor from a cold air inlet annular cavity 18 of the motor, the heat generated during the working of the permanent magnet synchronous motor is taken away through a gap between a spindle 4 of the permanent magnet synchronous motor, a stator core 10, a stator winding 11 and the shell 13 of the permanent magnet synchronous motor, the cooling gas flows through a cold air outlet annular cavity 14 of the motor and then is divided into two parts of cooling fluid, the first part of cooling fluid sequentially passes through a first suction pipeline 15 and a first suction annular cavity 16 and enters a first air inlet pipeline 1, then converges into a first part of main flow, and the second part of cooling fluid sequentially passes through a second suction pipeline 20 and a second suction annular cavity 19 and enters a second air inlet pipeline 9, and then converges into a second part of main flow.
The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.

Claims (7)

1. Bilateral self-suction cooling double-impeller air-flotation high-speed direct-drive centrifugal blower is characterized in that: comprises a first air inlet pipeline (1), a first centrifugal impeller (2), a first exhaust volute (3), a permanent magnet synchronous motor spindle (4), an air-floatation thrust disc (5), a first air-floatation radial bearing (6), a second air-floatation radial bearing (7), a motor cold air inlet annular cavity (18), a first suction pipeline (15), a stator core (10), a stator winding (11), a fixed structure (12), a permanent magnet synchronous motor shell (13), a motor cold air outlet annular cavity (14), a first suction annular cavity (16), a second air inlet pipeline (9), a second centrifugal impeller (8), a second exhaust volute (17), a second suction pipeline (20) and a second suction annular cavity (19), wherein the first centrifugal impeller (2), the air-floatation thrust disc (5) and the second centrifugal impeller (8) are sequentially fixed on the permanent magnet synchronous motor spindle (4), the radial bearing supporting positions of the permanent magnet synchronous motor spindle (4) are respectively supported by the first air-floatation radial bearing (6) and the second air-floatation radial bearing (7), one end of the first air inlet pipeline (1) is connected with the second air-floatation radial bearing (9) through the first centrifugal impeller (2), and one end of the second exhaust volute (8) is connected with the second air-inlet pipeline (3), the motor cold air outlet annular cavity (14) and the motor cold air inlet annular cavity (18) are located on the inner side of a permanent magnet synchronous motor shell (13) and on two sides of a stator winding (11), the motor cold air inlet annular cavity (18) and the motor cold air outlet annular cavity (14) are communicated with a cavity formed by the permanent magnet synchronous motor shell (13), one end of a first suction pipeline (15) is connected with an inlet of a first suction annular cavity (16), the other end of the first suction pipeline is communicated with the motor cold air outlet annular cavity (14), one end of a second suction pipeline (20) is connected with an inlet of a second suction annular cavity (19), the other end of the second suction pipeline is communicated with the motor cold air outlet annular cavity (14), the stator winding (11) is fixed on a stator iron core (10), the stator iron core (10) is fixed on the permanent magnet synchronous motor shell (13) through a fixing structure (12), and a main shaft center line of a permanent magnet synchronous motor main shaft (4) is coincided with center lines of the stator iron core (10) and the stator winding (11).
2. The double-sided self-suction cooling double-impeller air-flotation high-speed direct-drive centrifugal blower according to claim 1 is characterized in that: the flow cross section area of the first suction ring cavity (16) is gradually increased from the inlet to the outlet, the flow cross section area of the outlet is 3 times or more than that of the outlet, the inner surface of the first suction ring cavity (16) is in smooth gradual transition with the outlet surface of the first suction pipeline (15) and the side surface of the first air inlet pipeline (1) respectively, and the curvature radius is larger than 10 cm.
3. The double-sided self-suction cooling double-impeller air-flotation high-speed direct-drive centrifugal blower according to claim 1 is characterized in that: the flow cross section area of the second suction ring cavity (19) is gradually increased from the inlet to the outlet, the flow cross section area of the outlet is 3 times or more than that of the outlet, the inner surface of the second suction ring cavity (19) is in smooth gradual transition with the outlet surface of the second suction pipeline (20) and the side surface of the second air inlet pipeline (9), and the curvature radius is larger than 10 cm.
4. The double-sided self-suction cooling double-impeller air-flotation high-speed direct-drive centrifugal blower according to claim 1, characterized in that: the first air-floatation radial bearing (6) and the second air-floatation radial bearing (7) are dynamic pressure air-floatation bearings, and the rotating speed is 1.6-12 ten thousand revolutions per minute.
5. The double-sided self-suction cooling double-impeller air-flotation high-speed direct-drive centrifugal blower according to claim 1, characterized in that: the permanent magnet synchronous motor spindle (4) is composed of a spindle supporting section, a permanent magnet and a high-temperature alloy sheath, and the high-temperature alloy sheath is located on the outer side of the permanent magnet.
6. The working method of the double-sided self-suction cooling double-impeller air-flotation high-speed direct-drive centrifugal blower according to any one of claims 1 to 4, characterized by comprising the following steps: the working process of the main flow working medium means that the main flow working medium is divided into two parts of fluid with equal mass flow, the first part of fluid enters a first centrifugal impeller (2) through a first air inlet pipeline (1), is discharged from an outlet of a first exhaust volute (3) after the pressure is raised by the first centrifugal impeller (2), and is converged with the second part of fluid to enter an equipment main exhaust pipeline, the second part of fluid enters a second centrifugal impeller (8) through a second air inlet pipeline (19), is discharged from an outlet of a second exhaust volute (17) after the pressure is raised by the second centrifugal impeller (8), and is converged with the first part of fluid to enter the equipment main exhaust pipeline.
7. The working method of the double-sided self-suction cooling double-impeller air-flotation high-speed direct-drive centrifugal blower according to any one of claims 1 to 4, characterized by comprising the following steps: the working process of the cooling gas of the permanent magnet synchronous motor refers to that under the suction effect generated by high-speed rotation of a first centrifugal impeller (2) and a second centrifugal impeller (8), the cooling gas of the permanent magnet synchronous motor enters an inner cavity of a shell (13) of the permanent magnet synchronous motor from a cold air inlet ring cavity (18) of the motor, the heat generated during the working of the permanent magnet synchronous motor is taken away through a gap between a spindle (4) of the permanent magnet synchronous motor, a stator core (10), a stator winding (11) and the shell (13) of the permanent magnet synchronous motor, the cooling gas flows through a cold air outlet ring cavity (14) of the motor and then is divided into two parts of cooling fluid, the first part of cooling fluid sequentially passes through a first suction pipeline (15) and a first suction ring cavity (16) and then enters a first fluid of a main flow, the second part of cooling fluid sequentially passes through a second suction pipeline (20) and a second suction ring cavity (19) and then enters a second fluid of the main flow.
CN202110542530.9A 2021-05-19 2021-05-19 Bilateral self-suction cooling double-impeller air-floatation high-speed direct-drive centrifugal blower and working method Pending CN115370595A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110542530.9A CN115370595A (en) 2021-05-19 2021-05-19 Bilateral self-suction cooling double-impeller air-floatation high-speed direct-drive centrifugal blower and working method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110542530.9A CN115370595A (en) 2021-05-19 2021-05-19 Bilateral self-suction cooling double-impeller air-floatation high-speed direct-drive centrifugal blower and working method

Publications (1)

Publication Number Publication Date
CN115370595A true CN115370595A (en) 2022-11-22

Family

ID=84059680

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110542530.9A Pending CN115370595A (en) 2021-05-19 2021-05-19 Bilateral self-suction cooling double-impeller air-floatation high-speed direct-drive centrifugal blower and working method

Country Status (1)

Country Link
CN (1) CN115370595A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116498574A (en) * 2023-06-29 2023-07-28 鸿陆智能科技(山东)有限公司 Magnetic suspension double suction type centrifugal compressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116498574A (en) * 2023-06-29 2023-07-28 鸿陆智能科技(山东)有限公司 Magnetic suspension double suction type centrifugal compressor

Similar Documents

Publication Publication Date Title
CN112628161A (en) Air-cooled compressor
CN212672115U (en) Self-cooling system of totally enclosed doublestage centrifugation vapor compressor
CN115370595A (en) Bilateral self-suction cooling double-impeller air-floatation high-speed direct-drive centrifugal blower and working method
CN215830756U (en) Self-suction cooling type air-floating direct-drive centrifugal blower
CN207920880U (en) The double-impeller pump of symmetrical impeller arrangement
CN115370594A (en) Self-suction cooling type air floatation direct-drive centrifugal blower and working method
CN104976133A (en) High temperature water pump of mechanical seal and vortex pump closed type self-circular system
CN113294359B (en) High-performance single-side double-impeller magnetic levitation high-speed direct-drive turbine compressor and working mechanism
CN209654263U (en) A kind of high speed centrifugation compressor that dynamical and static pressure gas is hybrid bearing-supported
CN215830755U (en) Bilateral self-suction cooling double-impeller air-floatation high-speed direct-drive centrifugal blower structure
CN115370591A (en) Pressurizing suction cooling type air flotation centrifugal air compressor and working method
CN215830748U (en) High-performance single-side double-impeller air-floatation high-speed direct-drive turbo compressor
CN215805305U (en) Magnetic suspension centrifuge air-blower
CN112879313B (en) Submersible centrifugal pump with integrated pump
CN113250981B (en) High-performance single-side double-impeller air-floatation high-speed direct-drive turbine compressor and working method
CN112761973A (en) Nitrogen compressor structure driven by ultra-high-speed permanent magnet motor
CN204312395U (en) The turbosupercharger of axially wearing and tearing can be reduced
CN113404706A (en) Self-cooled air suspension air-blower
CN217783802U (en) Pressurizing suction cooling type air-float centrifugal air compressor
CN113417869A (en) Air suspension type low-pressure pure oil-free centrifugal compressor
CN219068012U (en) Air suspension centrifugal blower and negative pressure air cooling high-speed permanent magnet motor
CN113819077A (en) Magnetic suspension air blower with single-stage double-suction and double stator and rotor
CN202789710U (en) Multistage centrifugal blower
CN215830749U (en) High-performance unilateral double-impeller magnetic levitation high-speed direct-drive turbine compressor structure
CN214577793U (en) Air-cooled compressor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination