CN109838940A - A kind of closed heat pump/refrigeration system from cooling self-lubricating - Google Patents
A kind of closed heat pump/refrigeration system from cooling self-lubricating Download PDFInfo
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- CN109838940A CN109838940A CN201711203776.3A CN201711203776A CN109838940A CN 109838940 A CN109838940 A CN 109838940A CN 201711203776 A CN201711203776 A CN 201711203776A CN 109838940 A CN109838940 A CN 109838940A
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Abstract
The present invention relates to a kind of closed heat pump/refrigeration systems from cooling self-lubricating, which mainly includes air-bearing formula centrifugal compressor assembly, condenser/radiator, heater, the first expansion valve, the second expansion valve, evaporator/cold plate, trigger valve, compressor outlet bleed ports, bleed valve, air-bearing bleed air line.Certainly closed heat pump/refrigeration system of the cooling self-lubricating realizes lubrication and cooling using itself working medium.The present invention has the characteristics that structure is simple, adaptable without other cooling working medium, starting.
Description
Technical field
The present invention relates to refrigeration compressor art and spacecrafts, aircraft thermal control field, certainly more particularly to one kind
Closed heat pump/refrigeration system of cooling self-lubricating.
Background technique
With the rapid development of modern technologies, the demand and day of Future Spacecraft, the design of aircraft to thermal control problem
It is all to increase.Future Spacecraft, aircraft will face heat power consumption increase, conventional on-board is heat sink scarce capacity, heat flow density enhancing etc. it is new
Thermal control problem, requirement of the these problems to thermal control design is more and more harsh, and new thermal control technology will become research hotspot.
In the 3rd generation fighter plane, the electronic compartment thermal force of SU-27 is 18kW, and the electronic compartment thermal force of F-18 is 19kW.?
In 4th generation fighter plane, the electronic compartment thermal force of F-22 has reached 55kW.It is contemplated that a new generation such as phased-array radar electronics is set
Standby application will make the increase of the thermal force order of magnitude of future aircraft, it is contemplated that can achieve several hundred kilowatts of magnitude.With
The increase of thermal force, traditional aircraft thermal control means such as air circulation refrigeration system ACS (Air Cycle System) etc. will
It is difficult to provide enough cooling capacity to cool down these electronic equipments.Therefore, it is the thermal control demand for meeting future aircraft, energy need to be developed
Undertake the heat control system of high-power heat-dissipation, and heat pump techniques are solve the problems, such as the hot dissipation of future aircraft super high power important
Technological approaches.
In addition, throw-weight is a significant consideration for celestial body aerospace task outside ground.External using radiator
In the spacecraft thermal control system of heat dissipation, radiator quality usually accounts for the 50%~60% of whole system.According to this too luxuriant-bohr
Hereby graceful theorem, radiator surface heat dissipation capacity are proportional to 4 powers of its surface temperature, can pass through raising under the premise of same heat dissipation capacity
Radiator surface temperature achievees the purpose that being substantially reduced radiator surface accumulates, and heat pump system is able to achieve this function.External grinds
Study carefully and show system radiating amount in 10kW, heat pump can reduce 27% relative to one-way fluid loop mass is directlyed adopt, when being
When system heat dissipation capacity reaches 100kW, the quality that heat pump system mitigates is about 39%.It can be seen that continuous with dissipation power
Increase, advantage of the heat pump system in terms of mitigating weight is more and more obvious.
As can be seen that heat pump techniques, which have, improves heat loss through radiation temperature, reduces radiator area, improves sunny slope and extreme
The features such as heat-sinking capability and strong regulating power under environment, be solve future aircraft, the hot dissipation of spacecraft super high power is asked
The important technology approach of topic, however heat pump system refrigeration compressor technology is heat pump techniques under space microgravity and change gravity condition
With aerospace engineering using the bottleneck combined.
Conventional press is lubricated and cools down by gravity under ground routine gravity environment, therefore, micro- heavy in space
Under power and change gravity condition, the Conventional press on ground is not available then.To solve microgravity and becoming compressor under gravity condition
Lubrication problem, currently used method includes that non-lubricated compressor, lubricating oil refrigerant are total to recycle compressor, magnetic bearing
Compressor etc..Most common mode is the mode of gas lubrication again in oil-free lubrication, therefore the present invention is using air-bearing shafts
Hold the compressor of formula.
To sum up, it is able to achieve lubrication, cooling and the integrated heat pump system of sealing to develop, the present invention proposes one kind certainly
Closed heat pump/refrigeration system of cooling self-lubricating, the system can equally be well applied to the refrigeration on ground and the demand of heat pump application.
Summary of the invention
(1) technical problems to be solved
The object of the present invention is to provide it is a kind of can be realized using itself working medium it is cooling and sealing, can meet simultaneously space with
And closed heat pump/refrigeration system from cooling self-lubricating of ground heat pump and refrigeration system use condition.
(2) technical solution
In order to solve the above technical problem, the present invention provides a kind of closed heat pump/refrigeration system from cooling self-lubricating,
It is characterised in that it includes air-bearing formula centrifugal compressor assembly, condenser/radiator, heater, the first expansion valve, second
Expansion valve, evaporator/cold plate, trigger valve.
Wherein, the air-bearing formula centrifugal compressor assembly includes centrifugal impeller, compressor air suction mouth, compressor row
Port, air-bearing, motor, compressor case, centrifugal impeller air inlet, bleed valve, air-bearing bleed air line.
Wherein, working medium is in the process from the flowing in closed heat pump/refrigeration system of cooling self-lubricating are as follows:
Gaseous refrigerant working medium is flowed into from compressor air suction mouth, and working medium first passes around motor after entering compressor, most of
Working medium flowed through from the gap of motor and compressor case, a small amount of working medium is flowed through by the gap inside motor；Working medium stream
Motor is crossed, motor can be cooled down, while further increasing the degree of superheat of working medium；The working medium for flowing through motor passes through centrifugation leaf
Wheel air inlet enters centrifugal impeller part；Then working medium is compressed in centrifugal impeller, and compressed working medium is finally from compressor
Exhaust outlet outflow；Due to the cooling medium of refrigeration working medium and motor be it is same, ensure that entire refrigeration centrifugation pressure in this way
Contracting machine is the closed system of single working medium, while solving the problems, such as the cooling of compressor and leakage.
Wherein, the start-up course of the closed heat pump/refrigeration system from cooling self-lubricating are as follows:
Refrigeration working medium on startup, is heated to the operating pressure of air-bearing by compressor by heater first, makes to bring about the desired sensation
Floating axle holds start-up operation, overcomes the radial load of rotor by the way of static pressure air-bearing at this time；When air-bearing works normally,
Start motor, driving centrifugal impeller rotation；After centrifugal impeller work, refrigeration working medium can reach certain in compressor outlet
Pressure provides work gas source by way of compressor outlet bleed at this time for air-bearing；Entering high speed operation operation
After state, cause dynamic pressure effect that the load-carrying ability of bearing can be further improved by the bias of rotor unbalance generation.
(3) beneficial effect
A kind of closed heat pump/refrigeration system of oneself cooling self-lubricating provided by the invention, has the advantage that 1, sheet
Invention can not only use on ground, be equally applicable in the space become under gravity and microgravity condition.2, the present invention solves simultaneously
Determined the lubrication of compressor, cooling and leakage the problem of.3, this law is bright solves heat pump/refrigerating system compressor on startup
The control problem of air-bearing avoids the bearing wear of start-up course, guarantees the long-life.4, the simple, nothing of the invention with structure
The feature for needing other cooling working medium, starting adaptable.
Detailed description of the invention
Fig. 1 is a kind of system diagram of closed heat pump/refrigeration system from cooling self-lubricating provided by the invention.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Following instance
For illustrating the present invention, but it is not intended to limit the scope of the invention.
As shown in Figure 1, the present invention include air-bearing formula centrifugal compressor assembly 1, condenser/radiator 2, heater 3,
First expansion valve 4, the second expansion valve 5, evaporator/cold plate 6, trigger valve 7.
Air-bearing formula centrifugal compressor assembly 1 includes compressor case 8, air-bearing bleed air line 9, centrifugal impeller
10, compressor air suction mouth 11, preceding air-bearing 12, motor 13, rear air-bearing 14, centrifugal impeller air inlet 15, bleed valve 16,
Exhaust outlet of compressor 17.
Flow process of the working medium in closed heat pump/refrigeration system of certainly cooling self-lubricating of the invention are as follows:
Gaseous refrigerant working medium is flowed into from compressor air suction mouth 11, and working medium first passes around motor 13 after entering compressor, greatly
Partial working medium is flowed through from the gap of motor 13 and 1~10mm of compressor case 8, and a small amount of working medium passes through inside motor 13
Gap flow through；Working medium flows through motor 13, can cool down to motor 13, while further increasing the degree of superheat of working medium；Stream
The working medium for crossing motor 13 enters centrifugal impeller 10 by centrifugal impeller air inlet 15；Then working medium is pressed in centrifugal impeller 10
Contracting, compressed working medium are finally flowed out from exhaust outlet of compressor 17；Since the cooling medium of refrigeration working medium and motor 13 is same
One kind ensuring that entire refrigeration centrifugal compressor is the closed system of single working medium in this way, while solving the cold of compressor
But the problem of and revealing.
Certainly the start-up course in closed heat pump/refrigeration system of cooling self-lubricating of the invention are as follows:
Refrigeration working medium on startup, is heated to preceding air-bearing 12 and rear air-bearing shafts by heater 3 first by compressor
14 operating pressure is held, so that preceding air-bearing 12 and rear air-bearing 14 are started to work, uses the side of static pressure air-bearing at this time
Formula overcomes the radial load of rotor；When preceding air-bearing 12 and rear air-bearing 14 work normally, start motor 13, driving
Centrifugal impeller 10 rotates；After centrifugal impeller 10 works, refrigeration working medium can reach certain pressure in exhaust outlet of compressor 17,
Work gas source is provided for preceding air-bearing 12 and rear air-bearing 14 by way of 17 bleed of exhaust outlet of compressor at this time；?
After entering high speed operation operating status, dynamic pressure effect is caused to can be further improved by the bias of rotor unbalance generation
The load-carrying ability of bearing.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (4)
1. the present invention relates to a kind of closed heat pump/refrigeration systems from cooling self-lubricating, which is characterized in that including air-bearing
Formula centrifugal compressor assembly, condenser/radiator, heater, the first expansion valve, the second expansion valve, evaporator/cold plate, starting
Valve.
2. closed heat pump/refrigeration system as described in claim 1 from cooling self-lubricating, which is characterized in that air-bearing
Formula centrifugal compressor assembly includes centrifugal impeller, compressor air suction mouth, exhaust outlet of compressor, air-bearing, motor, compressor machine
Shell, centrifugal impeller air inlet, bleed valve, air-bearing bleed air line.
3. closed heat pump/refrigeration system as described in claim 1 from cooling self-lubricating, which is characterized in that working medium is in institute
The process for the flowing in air-bearing formula centrifugal compressor stated are as follows:
Gaseous refrigerant working medium is flowed into from compressor air suction mouth, and working medium first passes around motor, most work after entering compressor
Matter is flowed through from the gap of motor and compressor case, and a small amount of working medium is flowed through by the gap inside motor；Working medium flows through electricity
Machine can cool down motor, while further increase the degree of superheat of working medium；Flow through the working medium of motor by centrifugal impeller into
Port enters centrifugal impeller part；Then working medium is compressed in centrifugal impeller, and compressed working medium is finally from compressor air-discharging
Mouth outflow；Due to the cooling medium of refrigeration working medium and motor be it is same, ensure that entire refrigeration centrifugal compressor in this way
It is the closed system of single working medium, while solves the problems, such as the cooling of compressor and leakage.
4. closed heat pump/refrigeration system from cooling self-lubricating as described in claim 1, which is characterized in that it is described from
The start-up course of heart compressor are as follows:
Refrigeration working medium on startup, is heated to the operating pressure of air-bearing by compressor by heater first, so that air-bearing shafts
Start-up operation is held, overcomes the radial load of rotor by the way of static pressure air-bearing at this time；When air-bearing works normally, starting
Motor, driving centrifugal impeller rotation；After centrifugal impeller work, refrigeration working medium can reach certain pressure in compressor outlet
Power provides work gas source by way of compressor outlet bleed at this time for air-bearing；Entering high speed operation operation shape
After state, cause dynamic pressure effect that the load-carrying ability of bearing can be further improved by the bias of rotor unbalance generation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711203776.3A CN109838940A (en) | 2017-11-27 | 2017-11-27 | A kind of closed heat pump/refrigeration system from cooling self-lubricating |
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| CN201711203776.3A CN109838940A (en) | 2017-11-27 | 2017-11-27 | A kind of closed heat pump/refrigeration system from cooling self-lubricating |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111637086A (en) * | 2020-06-04 | 2020-09-08 | 青岛科技大学 | Centrifugal compressor air supply system for gas bearing support |
| WO2021018076A1 (en) * | 2019-07-30 | 2021-02-04 | 青岛海尔智能技术研发有限公司 | Hydrostatic bearing gas supply system and refrigeration device |
| WO2021018079A1 (en) * | 2019-07-30 | 2021-02-04 | 青岛海尔智能技术研发有限公司 | Hydrostatic bearing gas supply system and refrigeration apparatus |
| US11635091B2 (en) | 2020-03-13 | 2023-04-25 | Honeywell International Inc. | Compressor with integrated accumulator |
| US11841031B2 (en) | 2020-03-13 | 2023-12-12 | Honeywell International Inc. | Compressor sensor mount |
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| JPS6419254A (en) * | 1987-07-13 | 1989-01-23 | Hitachi Ltd | Bearing apparatus for compressor for turbo refrigerating machine |
| JP2005345083A (en) * | 2004-06-04 | 2005-12-15 | Shigeto Matsuo | Liquid-side energy recovering system of refrigeration air conditioner |
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| CN105782075A (en) * | 2015-01-13 | 2016-07-20 | Lg电子株式会社 | Turbo compressor and refrigerating device |
| CN205714830U (en) * | 2016-06-28 | 2016-11-23 | 杭州万辰机电科技有限公司 | Centrifugal compressor |
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Patent Citations (6)
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| JPS6419254A (en) * | 1987-07-13 | 1989-01-23 | Hitachi Ltd | Bearing apparatus for compressor for turbo refrigerating machine |
| JP2005345083A (en) * | 2004-06-04 | 2005-12-15 | Shigeto Matsuo | Liquid-side energy recovering system of refrigeration air conditioner |
| CN103727043A (en) * | 2014-01-03 | 2014-04-16 | 顾发华 | Two-stage centrifugal compressor and method for providing air for static pressure gas bearings of two-stage centrifugal compressor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021018076A1 (en) * | 2019-07-30 | 2021-02-04 | 青岛海尔智能技术研发有限公司 | Hydrostatic bearing gas supply system and refrigeration device |
| WO2021018079A1 (en) * | 2019-07-30 | 2021-02-04 | 青岛海尔智能技术研发有限公司 | Hydrostatic bearing gas supply system and refrigeration apparatus |
| US11635091B2 (en) | 2020-03-13 | 2023-04-25 | Honeywell International Inc. | Compressor with integrated accumulator |
| US11841031B2 (en) | 2020-03-13 | 2023-12-12 | Honeywell International Inc. | Compressor sensor mount |
| CN111637086A (en) * | 2020-06-04 | 2020-09-08 | 青岛科技大学 | Centrifugal compressor air supply system for gas bearing support |
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Application publication date: 20190604 |
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