CN110247504A - One kind being used for the air compressor motor general assembly of hydrogen fuel cell dual-cooling type ultracentrifugation - Google Patents
One kind being used for the air compressor motor general assembly of hydrogen fuel cell dual-cooling type ultracentrifugation Download PDFInfo
- Publication number
- CN110247504A CN110247504A CN201910470935.9A CN201910470935A CN110247504A CN 110247504 A CN110247504 A CN 110247504A CN 201910470935 A CN201910470935 A CN 201910470935A CN 110247504 A CN110247504 A CN 110247504A
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- cooling
- shell
- air compressor
- fuel cell
- air
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Classifications
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- 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
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- 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
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
Abstract
The invention discloses one kind to be used for the air compressor motor general assembly of hydrogen fuel cell dual-cooling type ultracentrifugation, including shell and the intracorporal shaft of shell, the front end of the shaft is provided with centrifugal impeller, the forward and backward side of shell is respectively arranged with front-end bearing pedestal, rear bearing block, water-cooling channel is provided in the shell, the water-cooling channel is connected with water pipe head, and the shaft rear end is provided with cooling wheel；Pass through the water cooling of water-cooling channel, double Cooling Designs of the air-cooled formation of cooling wheel, the temperature that rotor-support-foundation system high-speed high frequency operates lower high-speed motor rotor and foil air bearing is effectively reduced, it prevents bearing running hot from surface covering failure, stator overheat being caused to lead to the excessively thermally-induced loss of excitation failure of failure of insulation and rotor, improves air compressor machine job stability.
Description
Technical field
The present invention relates to air compressor machine technical fields, especially a kind of to be suitable for hydrogen fuel cell, have the double air-cooled structures of aqueous vapor
Single-stage ultracentrifugation air compressor machine.
Background technique
As energy-saving and environment-friendly demand gradually increases, hydrogen fuel cell technology flourishes.Hydrogen fuel cell is a kind of incites somebody to action
Chemical energy is converted directly into the device of electric energy by electrode reaction by hydrogen and oxygen, and reaction product is mainly water, is realized real
No pollution.Simultaneously as do not limited by Carnot cycle, energy conversion efficiency can reach 60%~80%, high efficiency, without dirt
The features such as dye, usability be wide, low noise, is the huge power source of development potentiality.
Air compressor is the important component of hydrogen fuel cell, and by being pressurized into heap air, fuel can be improved
The power density and efficiency of battery reduce the size of fuel cell system, while the parasitic power consumption of air compressor machine is very big, accounts for about fuel
The 80% of battery auxiliary power consumption, operational efficiency and power density ratio directly affect the overall performance of system.
Air compressor machine suitable for hydrogen fuel cell must satisfy following requirement: (1) oil-free, lubricating oil can be damaged seriously
Proton exchange membrane reduces its service life；(2) efficiently, air compressor machine parasitic power is big, and efficiency directly affects overall efficiency；(3)
The advantage of miniaturization, low cost, high power density and low cost facilitates its industrialization；(4) low noise, air compressor machine are fuel electricity
One of maximum noise source of cell system, reducing its noise helps to enhance man-machine friendly interaction, improves the market competitiveness；(5) good
Good dynamic response capability is that air mass flow heel pressure can track output power and be adjusted when demand power changes.
For oil-free requirement, inevitably permeability enters cell reaction heap to conventional ball bearings, influences other component
Test, with air-supported and lubricating spindle be the optimal selection scheme of air compressor machine using advanced elastic foil bearing.It is right
In efficient, miniaturization, the requirement of low noise, the power consumption of air compressor machine accounts for about the 80% of fuel cell auxiliary power consumption, accounts for battery output
20-the 30% of power, tradition is vortexed, screw isometric(al) formula air compressor machine, and there are phase mutual friction between blade, increase friction damage
Consume and reduce efficiency, at the same noise also due to the presence of friction and increase, and the direct-drive type centrifugal air compressor under identical operating condition,
Other mechanical loss are not present other than windmill is lost in head, and efficiency greatly improves, and aerolite, body can be used in head
Product, weight can reduce 70% or more.Centrifugal air compressor flow is directly proportional to revolving speed, pressure and revolving speed it is square directly proportional, only
Revolving speed need to be adjusted by frequency-variable controller can be obtained the flow heel pressure of corresponding output power demand, simple controllable.Therefore, foil
The high-speed motor of piece air bearing bearing directly drives the excellent scheme that centrifugal air compressor is hydrogen fuel cell.
In general, the output of air compressor machine needs metered flow >=125g/s, pressure ratio >=2.5, in order to reach the height of demand
Pressure ratio, direct-drive type centrifugal air compressor is there are two-stage and single-stage two schemes, compared to by two concatenated two-stage sides of head part
Case, single-stage solution have the advantages such as weight is small, power density is high, pneumatic efficiency is high, but the higher driving revolving speed of its demand.Single-stage
Ultracentrifugation air compressor machine will generally reach 120,000rpm and operate above, therefore also bring high power density motor heat dissipation
Technical problem.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provide it is compact-sized, high-efficient, small in size, light-weight, for air pressure
Single-stage ultracentrifugation air compressor motor general assembly of the hydrogen fuel cell for the features such as power is high with the double air-cooled structures of aqueous vapor.
The technical solution adopted by the present invention to solve the technical problems is:
One kind being used for the air compressor motor general assembly of hydrogen fuel cell dual-cooling type ultracentrifugation, including shell and intracorporal turn of shell
Axis, the front end of the shaft are provided with centrifugal impeller, and the forward and backward side of shell is respectively arranged with front-end bearing pedestal, rear bearing block, institute
It states and is provided with water-cooling channel in shell, the water-cooling channel is connected with water pipe head, and the shaft rear end is provided with cooling wheel.
As a preference, it is additionally provided with cooling wheel cap on rear side of the shell, the cooling wheel, which covers, is provided with air inlet
Mouthful, the air outlet of the cooling wheel cap is connected to the venthole of rear bearing block.
As a preference, the shell includes casing ontology and the cooling jacket that is sleeved on casing ontology, wherein
The water-cooling channel is between casing ontology and cooling jacket.
As a preference, the front-end bearing pedestal, shell, rear bearing block are connected to form cooling duct.
As a preference, the shaft front end is additionally provided with thrust button, and preceding radial direction is provided on the front-end bearing pedestal
Foil air bearing, preceding thrust foil air bearing, rear thrust foil air bearing.
As a preference, the water-cooling channel front and rear sides are respectively arranged with sealing ring.
The beneficial effects of the present invention are: by the water cooling of water-cooling channel, double Cooling Designs of the air-cooled formation of cooling wheel,
The temperature that rotor-support-foundation system high-speed high frequency operates lower high-speed motor rotor and foil air bearing is effectively reduced, prevents bearing running hot
Cause surface covering failure, stator overheat to lead to the excessively thermally-induced loss of excitation failure of failure of insulation and rotor, improves air compressor machine work
Stability.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is perspective view of the invention.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The present invention is further elaborated.For the thorough explanation present invention, some certain details can be related in following description
Section.And in these no specific details, the invention can still be realized, i.e., the technical staff in fields uses herein
These describe and state that the others skilled in the art into fields can more effectively introduce their work essence.
Referring to Fig.1, a kind of to be used for the air compressor motor general assembly of hydrogen fuel cell dual-cooling type ultracentrifugation, including 1 He of shell
Shaft 2 in shell 1, the front end of the shaft 2 are provided with centrifugal impeller 3, and the forward and backward side of the shell 1 is respectively arranged with front axle
Seat 4, rear bearing block 5 are held, water-cooling channel 6 is provided in the shell 1, the water-cooling channel 6 is connected with water pipe head 61, described
2 rear end of shaft is provided with cooling wheel 7.
In compressor operation, rotor-support-foundation system rotation, cooling water circulates in water-cooling channel 6 connects, from stator appearance
The heat of its generation is taken away in face, controls the temperature rise of motor.Cooling wheel 7 sucks air and is blown by the venthole that rear axle is made
Enter inside shell 1, cooling wheel is directly driven by high-speed motor, without introducing extraneous cooling air, reduces the auxiliary facility of complete machine.?
Under the operating of rotor-support-foundation system high-speed high frequency, the loss of rotor windmill, stator harmonic loss, rotor eddy current loss are greatly increased, the cooling
The temperature of high-speed motor rotor and foil air bearing can be effectively reduced in design, prevent bearing running hot from surface covering being caused to lose
Effect, stator overheat lead to the excessively thermally-induced loss of excitation failure of failure of insulation and rotor.
Air compressor machine uses single-stage impeller scheme, and variable frequency drives directly drive high-speed permanent magnetic synchronous motor, motor band turn
Subsystem carries out ultrahigh speed rotation, and revolving speed can reach 150,000rpm, and the centrifugal impeller on rotor-support-foundation system passes through import wheel
Lid sucks air and by sending out after spiral case gas collection, and output gas can meet the use need of flow >=125g/s, pressure ratio >=2.5
It asks.According to the different output power of battery system, frequency converter can match adjusting input frequency, control high-speed permanent magnetic synchronous motor with
Different rotating speeds operation, and then export and the matched air mass flow of output power and pressure.Rotor-support-foundation system is rotation assembly, rotor
The remaining parts such as system external stator, casing are stationary parts.
Front-end bearing pedestal 4, rear bearing block 5 are connect with front and back shaft interference, prevent from loosening, and bearing and bearing block are convenient for individually
Disassembly, replacement
It is additionally provided with cooling wheel cap 8 on rear side of the shell 1, is provided with air inlet 81, the cooling on the cooling wheel cap 8
The air outlet of wheel cap 8 is connected to the venthole 51 of rear bearing block 5, and guidance cooling air-flow enters inside motor from rear bearing block, is protected
Demonstrate,proving cooling wheel 7 has suitable working clearance and out flow channel.
The shell 1 includes casing ontology 11 and the cooling jacket 12 being sleeved on casing ontology 11, wherein the water cooling
Channel 6 is between casing ontology 11 and cooling jacket 12.6 front and rear sides of water-cooling channel are respectively arranged with sealing ring 62.
The front-end bearing pedestal 4, shell 1, the connection of rear bearing block 5 form cooling duct.
2 front end of shaft is additionally provided with thrust button 9, radial foil air bearing before being provided on the front-end bearing pedestal 4
41, preceding thrust foil air bearing 43, rear thrust foil air bearing 44.Rear bearing block 5 is equipped with rear radial foil air axis
Hold 42.After cooling wheel 7 sucks air, wherein one cooling air-flow passes through rotor surface and stator yoke, cold from 1 front end of shell
But hole outlet, another burst of cooling air-flow by preceding radial foil air bearing 41, preceding thrust foil air bearing 43, after thrust foil
The thrust shaft block of piece air bearing 44, thrust button 9 is finally flowed out from the cooling hole of front-end bearing pedestal 4.Rotor-support-foundation system high speed rotation
When, the air film gap of wedge shape is formed between bearing holder (housing, cover) and radial foil bearing, high pressure air film floats rotor-support-foundation system bearing, stablizes
When operation, rotor is directly not present with bearing and directly contacts, and greatly reduces the frictional dissipation of shaft, provide motor and impeller it
Between transmission efficiency.Thrust button is constrained by two thrust foil air bearings on rotor-support-foundation system, when rotor-support-foundation system high speed rotation, only
Bearing air film is formed between push-plate and thrust foil bearing, prevents rotor-support-foundation system axial float.In traditional structure thrust button with from
Lobus cardiacus wheel distinguishes rotor-support-foundation system both ends again, and when running at high speed, rotor-support-foundation system temperature is increased, and thermally expands, rotor-support-foundation system
Axial length increase, and due to the constraint of thrust button 9, significant change occurs for the gap of centrifugal impeller 3, in some instances it may even be possible to import
Wheel cap touches mill, seriously affects performance and reliability, in hydrogen fuel cell system, the super performance of expected change meeting of performance of air compressor
Seriously affect the performance of battery system.Thrust button is mounted on 3 end of centrifugal impeller, the main shadow of the thermal expansion effects of shaft by the design
The cooling wheel of rear end is rung, and avoids influencing centrifugal impeller 3, guarantees that air compressor machine is stable, reliably work.
Thrust button 9 and centrifugal impeller 3 on rotor-support-foundation system are connected on front rotary shaft by the way of pull rod and nut check,
Impeller and thrust button are pre-tightened by bolt tensioning jack, pretightning force need to reach the standard pretightning force of 12.9 grade bolts, to ensure leaf
There are enough contact stiffness between wheel-thrust button-front rotary shaft, improves the rotor dynamics stability under high speed rotation.
It is permanent magnet in the middle part of rotor-support-foundation system, sheath is connected front rotary shaft, permanent magnet and rear shaft by the way of interference connection
It is connected into entirety, guarantees to influence dynamic magnitude of interference between lower jacket and front rotary shaft, permanent magnet and rear shaft not in centrifugal force, temperature rise
The rotor dynamics stability under high speed rotation is improved less than 0.08mm to ensure to have enough contact stiffness.
Sealing plate installation on front-end bearing pedestal, thereon there are two well-designed sealing structure, wherein radial seal structure
In order to adjust axial force suffered by impeller entirety, to match the design performance of thrust bearing, the radial position of the sealing passes through
It carries out complete three-dimensional coupling CFD to impeller, spiral case, sealing runner to emulate to obtain, to guarantee thrust bearing under suitable axial force
Reach optimal working condition.
According to above-mentioned principle, the present invention can also be made appropriate changes and modifications to the above embodiments.Therefore, this hair
It is bright to be not limited to specific embodiment disclosed and described above, some modifications and changes of the invention should also be as to fall into this
In the scope of protection of the claims of invention.
By it was verified that new technology has the advantage that compared with similar technique
(1) present invention directly drives centrifugal impeller using high-speed permanent magnetic synchronous motor, reaches as high as 150,000rpm, and revolving speed is high,
Power density is big, and is supported using the foil bearing of air lubrication, avoids the mechanical friction directly contacted, and transmission efficiency is high,
Flow is flexibly controllable with pressure output, output power that can be different according to battery system, and frequency converter can match adjusting input frequency,
Control high-speed permanent magnetic synchronous motor is run with different rotating speeds, and then is exported and the matched air mass flow of output power and pressure.
(2) rotor-support-foundation system building block uses aviation high-strength material, using big interference, big preload between component and component
Connection, contact stiffness is big, and the rotor dynamics stability under high revolving speed operation is effectively ensured.
(3) the double cold designs of aqueous vapor are used, one side casing outer surface designs cooling water cooling, takes away it from stator outer surface
The heat of generation controls the temperature rise of motor；On the other hand cooling wheel is designed in rotor-support-foundation system rear end, cooling wheel is by high speed electricity
Machine directly drives, and without introducing extraneous cooling air, additional cooling is provided under the premise of not increasing the auxiliary of complete machine, the Cooling Design
The temperature that rotor-support-foundation system high-speed high frequency operates lower high-speed motor rotor and foil air bearing can be effectively reduced, prevent bearing mistake
Thermal conductivity causes surface covering failure, stator overheat to lead to the excessively thermally-induced loss of excitation failure of failure of insulation and rotor.
(4) using thrust button, the design of the ipsilateral installation of centrifugal impeller, the thermal expansion effects of shaft is effectively avoided to influence centrifugation
Impeller makes impeller clearance not increase and be obviously reduced with shaft temperature, guarantees that air compressor machine is stable, reliably runs.
(5) axial force of impeller carries out complete three-dimensional coupling CFD simulation and forecast, Fine design using impeller, spiral case, sealing runner
Sealing structure guarantees that thrust bearing reaches optimal working condition under suitable axial force.
Claims (6)
1. one kind is used in the air compressor motor general assembly of hydrogen fuel cell dual-cooling type ultracentrifugation, including shell (1) and shell (1)
Shaft (2), the front end of the shaft (2) is provided with centrifugal impeller (3), and the forward and backward side of the shell (1) is respectively arranged with front axle
Hold seat (4), rear bearing block (5), it is characterised in that: be provided with water-cooling channel (6) in the shell (1), the water-cooling channel (6)
It is connected with water pipe head (61), shaft (2) rear end is provided with cooling wheel (7).
2. one kind according to claim 1 is used for the air compressor motor general assembly of hydrogen fuel cell dual-cooling type ultracentrifugation,
It is characterized in that: being additionally provided with cooling wheel cap (8) on rear side of the shell (1), be provided with air inlet on the cooling wheel cap (8)
(81), the air outlet of the cooling wheel cap (8) is connected to the venthole (51) of rear bearing block (5).
3. one kind according to claim 1 is used for the air compressor motor general assembly of hydrogen fuel cell dual-cooling type ultracentrifugation,
Be characterized in that: the shell (1) includes casing ontology (11) and the cooling jacket (12) being sleeved on casing ontology (11), wherein
The water-cooling channel (6) is located between casing ontology (11) and cooling jacket (12).
4. one kind according to claim 1 or 2 is used for the air compressor motor general assembly of hydrogen fuel cell dual-cooling type ultracentrifugation,
It is characterized by: the front-end bearing pedestal (4), shell (1), rear bearing block (5) connection form cooling duct.
5. one kind according to claim 1 is used for the air compressor motor general assembly of hydrogen fuel cell dual-cooling type ultracentrifugation,
Be characterized in that: shaft (2) front end is additionally provided with thrust button (9), and radial foil is empty before being provided on the front-end bearing pedestal (4)
Gas bearing (41), preceding thrust foil air bearing (43), rear thrust foil air bearing (44).
6. one kind according to claim 3 is used for the air compressor motor general assembly of hydrogen fuel cell dual-cooling type ultracentrifugation,
Be characterized in that: water-cooling channel (6) front and rear sides are respectively arranged with sealing ring (62).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910470935.9A CN110247504A (en) | 2019-05-31 | 2019-05-31 | One kind being used for the air compressor motor general assembly of hydrogen fuel cell dual-cooling type ultracentrifugation |
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| CN201910470935.9A CN110247504A (en) | 2019-05-31 | 2019-05-31 | One kind being used for the air compressor motor general assembly of hydrogen fuel cell dual-cooling type ultracentrifugation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111158139A (en) * | 2020-02-22 | 2020-05-15 | 中国工程物理研究院流体物理研究所 | Ultra-high-speed rotating prism optical fiber delay line for real-time terahertz medical imaging |
| CN111271304A (en) * | 2020-02-27 | 2020-06-12 | 海德韦尔(太仓)能源科技有限公司 | Centrifugal air compressor with double cooling systems |
| CN114024408A (en) * | 2021-11-24 | 2022-02-08 | 贵州航天林泉电机有限公司 | Double-cooling double-salient-pole generator |
| CN114673689A (en) * | 2022-04-22 | 2022-06-28 | 天津捷强动力装备股份有限公司 | High-density culture fan |
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| CN111158139A (en) * | 2020-02-22 | 2020-05-15 | 中国工程物理研究院流体物理研究所 | Ultra-high-speed rotating prism optical fiber delay line for real-time terahertz medical imaging |
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| CN114673689A (en) * | 2022-04-22 | 2022-06-28 | 天津捷强动力装备股份有限公司 | High-density culture fan |
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Application publication date: 20190917 |