CN208564662U - Supercritical carbon dioxide Brayton cycle power part coolant seal insulation system - Google Patents
Supercritical carbon dioxide Brayton cycle power part coolant seal insulation system Download PDFInfo
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- CN208564662U CN208564662U CN201821014675.1U CN201821014675U CN208564662U CN 208564662 U CN208564662 U CN 208564662U CN 201821014675 U CN201821014675 U CN 201821014675U CN 208564662 U CN208564662 U CN 208564662U
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Abstract
本实用新型提供一种超临界二氧化碳布雷顿循环动力部件冷却密封隔热系统：包括机壳与主轴之间的环状间隙，环状间隙的一端与压缩机侧泄漏间隙相连通，另一端设置有冷热工质混合腔室，冷热工质混合腔室与透平侧泄漏间隙相连通，机壳上设置有与冷热工质混合腔室相连通的排气孔。本实用新型的机壳与主轴之间具有环状间隙，可将压缩机侧的低温泄漏流引入机壳内，以冷却电机，并于冷热工质混合腔室内与透平侧高温泄漏流混合后通过排气孔引出至循环系统冷却器，可防止高温工质损坏主轴及轴承、线圈，结构简单。另外，本实用新型中利用隔热套筒将主轴与高温工质及透平完全隔开，有效解决了透平向主轴传递热量的问题。
The utility model provides a cooling, sealing and thermal insulation system for supercritical carbon dioxide Brayton cycle power components: comprising an annular gap between a casing and a main shaft, one end of the annular gap is communicated with a compressor side leakage gap, and the other end is provided with a The cold and hot working medium mixing chamber is communicated with the leakage gap on the turbine side, and the casing is provided with an exhaust hole communicated with the cold and hot working medium mixing chamber. The utility model has an annular gap between the casing and the main shaft, which can introduce the low temperature leakage flow from the compressor side into the casing to cool the motor, and mix with the high temperature leakage flow on the turbine side in the cold and hot working medium mixing chamber It is then led out to the cooler of the circulation system through the exhaust hole, which can prevent the high temperature working medium from damaging the main shaft, bearings and coils, and has a simple structure. In addition, in the present invention, the main shaft is completely separated from the high temperature working medium and the turbine by the heat insulating sleeve, which effectively solves the problem of heat transfer from the turbine to the main shaft.
Description
Technical field
The utility model relates to a kind of power parts of supercritical carbon dioxide Brayton cycle electricity generation system, and in particular to
The coolant seal insulation system of the power part.
Background technique
Supercritical carbon dioxide Brayton cycle electricity generation system have cycle efficieny is high, energy density is high, it is compact-sized, build
This low many advantages is caused, in emerging and traditional energy field, is regarded as most promising energy conversion system
One of system.
Core component one of of the power part as supercritical carbon dioxide Brayton cycle electricity generation system mainly include
Compressor, turbine, motor, bearing and sealing etc., for the small-power circulatory system, power part is frequently with turbine-motor-compression
Machine (T-A-C) arrangement, i.e. turbine, motor and compressor is coaxially arranged, and turbine and compressor are respectively arranged in machine shaft
The two sides of (main shaft), motor two sides are disposed with transverse bearing and thrust bearing, between turbine and bearing and compressor and bearing it
Between be arranged with labyrinth seal.
When power part is run under high speed conditions, the coil on rotor and stator can generate a large amount of heat,
Inevitably have part high temperature simultaneously, the carbon dioxide working medium of high pressure is let out via turbo wheel wheel back gap and labyrinth seal
It leaks into motor chamber, heat in motor chamber is caused to gather, temperature increases rapidly, makes rotor that loss of excitation, or even damage occur
Coil and bearing on bad stator；In addition to this, turbine side high temperature, high pressure working condition under work when, have part heat
Amount is conducted via turbine to machine shaft, and shaft temperature is caused to increase, and damages rotor.In order to avoid the hair of above situation
Raw, power part need to be equipped with a set of coolant seal insulation system.Safety of the structure of coolant seal insulation system to power part
Property, stability and system complexity have a significant impact.Currently, in the power of supercritical carbon dioxide Brayton cycle electricity generation system
In component, arranging exhaust air pipeline and pass through frequently with arranging water-cooling channel outside electrical-coil, while on power part shell
Booster pump is by the cooling scheme that leakage under high temperature fluid pumps out to reduce influence of the high temperature to power part.The cooling scheme can be effective
Reduce the indoor temperature of motor cavity, it is ensured that the safety of power part, but the complexity of system is also increased simultaneously, and cannot be had
The heat conduction problem that effect solves between turbine and machine shaft can be to power part if turbine end works under higher temperature conditions
Safety produce a very large impact.
In conclusion urgently proposing a kind of efficient supercritical carbon dioxide Brayton cycle electricity generation system power part at present
Part coolant seal insulation system.
Summary of the invention
The purpose of the utility model is to overcome the deficiency of existing coolant seal insulation system, a kind of efficient super face is provided
Boundary's carbon dioxide Brayton cycle power part coolant seal insulation system.
To achieve the above object, the utility model uses following technical scheme:
The power part coolant seal insulation system includes casing and the main shaft that is set in casing, and the two of the casing
End is provided with labyrinth seal, the casing wherein labyrinth seal of one end (compressor side) and the compressor impeller for being set to main shaft one end
Match, the labyrinth seal of the other end (turbine side) is matched with the turbo wheel for being set to the main shaft other end, the casing with
There are annular gap between main shaft, one end of the annular gap passes through the radial clearance of corresponding end (compressor side) labyrinth seal
It is connected with compressor impeller wheel back leakage-gap, the other end of annular gap is provided with cold and hot working medium mixing chamber, cold and hot work
Matter mixing chamber carries on the back leakage-gap with turbo wheel wheel by the radial clearance of corresponding end (turbine side) labyrinth seal and is connected, machine
The gas vent being connected with cold and hot working medium mixing chamber is provided on shell, gas vent is connected with the cooler being set to outside casing.
Preferably, the annular gap includes for that will carry on the back leakage-gap (and compressor side labyrinth from compressor impeller wheel
The radial clearance of sealing) successively connecting into the leakage stream (working medium) in casing along what is conveyed towards cold and hot working medium mixing chamber direction
Logical the first cooling duct, the second cooling duct, third cooling duct, the 4th cooling duct, the 5th cooling duct and the 6th are cold
But channel；First cooling duct and the 6th cooling duct be a pair of of protection bearing for being set on casing respectively with main shaft it
Between gap；Second cooling duct and the 5th cooling duct be a pair of of radial magnetic bearing for being set on casing respectively
Gap between main shaft；The third cooling duct is the thrust magnetic suspension bearing being set on casing and is set on main shaft
Thrust disc between gap；4th cooling duct is the motor stator coil being set on casing and is set on main shaft
Rotor between gap.
Preferably, the cold and hot working medium mixing chamber is by the 6th cooling duct exit end face, main shaft, turbo wheel, correspondence
The region of end (turbine side) labyrinth seal and casing setting gas vent surrounds jointly；The gas vent is arranged in cold and hot working medium
In casing corresponding region above mixing chamber.
Preferably, the cold and hot working medium mixing chamber is by flowing through (pressing from compressor end for the first to the 6th cooling duct
Contracting machine impeller wheel carries on the back leakage-gap) the high pressure cold fluid that leaks into casing will be from turbine end (turbo wheel wheel carry on the back leakage-gap)
The high-pressure heated fluid and main shaft isolation for leaking into casing are opened, and cold and hot fluid is mixed and is discharged via gas vent, institute in this chamber
It states exhaust hole exits to be connected by pipeline with recycle system coolers high temperature side entrance, cold and hot fluid-mixing is in the cooler high temperature
It is led at the working medium entrances of compressor impeller after the heat release of side by the cooler.
Preferably, pin is provided on the end face of the casing, one end of pin and the pin hole being set on casing are logical
It crosses close-fitting mode to fix, the length of pin is greater than the depth of pin hole, the other end of pin and is set to labyrinth seal
On casing side interporal lacuna cooperate (radial clearance and axial gap).
Preferably, the labyrinth seal includes that annular wears graphite grazing body, compressor impeller and turbo wheel
Wheel back side is provided with the radial seal tooth contacted with the inner ring for wearing graphite grazing body of casing corresponding end labyrinth seal, compresses
Pusher side labyrinth seal is collectively formed by the radial seal tooth that can wear graphite grazing body and compressor impeller wheel back, turbine side fan
Palace sealing is collectively formed by the radial seal tooth that can wear graphite grazing body and turbo wheel wheel back.Graphite grazing body can be worn
It is in close contact by the pressure of leakage stream with corresponding chassis axial end face close to the end face of casing.Between the back leakage of compressor impeller wheel
Gap be located at compressor impeller wheel back side and compressor side labyrinth seal wear end face of the graphite grazing body far from casing it
Between, what turbo wheel wheel back leakage-gap was located at the wheel back side of turbo wheel and the labyrinth seal of turbine side wears graphite grazing body
Between end face far from casing.
Preferably, the power part coolant seal insulation system further includes insulating sleeve and connecting rod, insulating sleeve
Be set between main shaft and turbo wheel, connecting rod run through turbo wheel, connecting rod stretch out turbo wheel one end be provided with every
Thermally induced flow cap (is located at turbo wheel sender property outlet), and heat-insulated fair water cone separates high-pressure heated fluid and connecting rod, connecting rod
The other end be connected with main shaft.
Preferably, the insulating sleeve is set on main shaft by interference fit or thread connecting mode, and insulating sleeve is certainly
Spindle nose extends inwardly to main shaft lateral side regions where the cold and hot working medium mixing chamber of covering, and the insulating sleeve is by main shaft and high
It presses hot fluid and turbo wheel completely separated, avoids directly contacting with main shaft.
Preferably, the connecting rod is connected through a screw thread mode and is connected or is fixed on main shaft with main shaft, spindle centerline
It is overlapped with connecting rod center line, turbo wheel is contacted by interference fit type with the insulating sleeve being arranged on main shaft, and really
Determine turbo wheel radial position, there are certain intervals (to connect turbo wheel not with connecting rod between turbo wheel and connecting rod
Touching), heat-insulated fair water cone uses lid formula nut, fixed turbo wheel axial position.
Preferably, the insulating sleeve and heat-insulated fair water cone use the metal material that thermal coefficient is low, heat-conductive characteristic is poor,
Such as Ni-Cr-Mo corrosion resistant alloy Inconel 625, cast superalloy K4002, titanium alloy TC 4 and titanium alloy T C11.
The beneficial effects of the utility model are embodied in:
Coolant seal insulation system described in the utility model has the annular gap between casing and main shaft, can incite somebody to action
The low temperature leak stream of compressor side introduces in casing, to cool down motor, and it is high in blocking turbine side in cold and hot working medium mixing chamber
Warm leakage stream is drawn after cold and hot working medium mixing by gas vent, and high temperature refrigerant damage main shaft and bearing, coil can be prevented, and
Structure is simple, reliable.
Further, in the utility model, the cold and hot indoor fluid of working medium mixing chamber is expelled to cyclic system via gas vent
System cooler high temperature side entrance, is not necessarily to additional booster pump device, high system safety.
Further, in the utility model, it is disposed with insulating sleeve between main shaft and turbo wheel, can effectively solve
Put down the problem of transmitting heat to main shaft.
Further, in the utility model, insulating sleeve is completely separated by main shaft and high temperature refrigerant and turbine, while turbine
Impeller is fixed on main shaft by interference fit type, contacts with insulating sleeve, and radial positioning, and turbo wheel does not connect with connecting rod
Touching, connecting rod extension end can reduce turbo wheel and high temperature refrigerant are transmitted to using the fixed turbine axial position of heat-insulated fair water cone
The heat of main shaft improves the safety of power part.
Detailed description of the invention
Fig. 1 is one of the structural schematic diagram of the utility model；
Fig. 2 is the second structural representation of the utility model；
In figure: 1 is compressor impeller, and 2 carry on the back leakage-gap for compressor impeller wheel, and 3 be that can wear graphite labyrinth seal, 4
The first cooling duct, the second cooling duct, third cooling duct, the 4th cooling logical is followed successively by for pin, 5,7,10,13,14,15
Road, the 5th cooling duct, the 6th cooling duct, 6 be protection bearing, and 8 be radial magnetic bearing, and 9 be thrust magnetic suspension bearing,
11 be rotor, and 12 be motor stator coil, and 16 be cold and hot working medium mixing chamber, and 17 be gas vent, and 18 be insulating sleeve, 19
Leakage-gap is carried on the back for turbo wheel wheel, 20 be turbo wheel, and 21 be heat-insulated water conservancy diversion nut, and 22 be connecting rod, and 23 be main shaft, and 24 are
Casing.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.
Currently used supercritical carbon dioxide Brayton cycle power part coolant seal insulation system needs additional
Water cooling plant and booster pump, structure is complicated, and not can solve heat transfer problem between turbine and main shaft.For this problem,
The utility model provides a kind of efficient coolant seal insulation system, can simplify power part coolant seal insulation system and can have
Effect reduces the heat transmitted between turbine and main shaft.
Embodiment 1
A kind of supercritical carbon dioxide Brayton cycle power part coolant seal insulation system provided by the utility model
As shown in Figure 1, the coolant seal insulation system include compressor impeller wheel back leakage-gap 2,24 both ends of casing arrangement grind
Damage graphite labyrinth seal 3, multiple cooling ducts for being sequentially arranged and being connected to, cold and hot working medium mixing chamber 16, gas vent 17, heat-insulated
Sleeve 18, turbo wheel wheel back leakage-gap 19, connecting rod 22 and heat-insulated water conservancy diversion nut 21.It carries on the back and leaks via compressor impeller wheel
Gap 2 and labyrinth seal enter cooling working medium of the carbon dioxide recycle working medium as coolant seal insulation system of cooling duct.
Pin 4 is disposed on the casing 24, and pin 4 and casing 24 are fitted close, the length of pin 4 is greater than casing 24
The depth of upper pin hole can wear hole and 4 clearance fit of pin that graphite labyrinth seal 3 is arranged in casing side.Compressor side (figure
Left side in 1) and turbine side (in Fig. 1 right side) can wear that graphite labyrinth seal 3 is included in compressor impeller 1 and turbo wheel 20 is right
The ring-shaped graphite seal that the radial seal tooth of back side arrangement should be taken turns and be in contact with the sealing tooth, can wear graphite labyrinth seal
3 are in close contact by the pressure and 24 axial end face of casing of leakage stream, can wear graphite labyrinth seal 3 and 24 axial end face of casing
Avoidable working medium is in close contact to leak into cooling duct, between pin 4 and labyrinth seal from casing 24 and the contact surface of labyrinth seal
Gap cooperates the safety that can guarantee labyrinth seal, prevents main shaft 23 from damaging labyrinth seal, while radial seal in rotary course
Tooth is in contact with ring-shaped graphite seal and (has the radial clearance being located inside sealing) can reduce compressor leaf to greatest extent
The leakage rate of wheel and turbo wheel wheel back leakage-gap.
The case where to prevent power part from surprisingly failing in the process of running, can wear graphite labyrinth in compressor side
3 upstream of graphite labyrinth seal can be worn and be equipped with protection bearing 6 by sealing 3 downstreams and turbine side, when magnetic suspension bearing failure, protection
Bearing 6 can support main shaft 23 and continue to rotate, and main shaft is avoided directly to contact with other stationary parts, and safety accident occurs, and protect axis
Holding 6 may be selected to be ball bearing.The protection bearing 6 is fixed on 24 inner wall of casing, is not contacted with main shaft 23, the two (main shaft 23
With protection bearing 6) between annular gap constitute the first cooling duct 5 and the 6th cooling duct 15；Compressor side protects bearing 6
Downstream and turbine side protection 6 upstream of bearing be equipped with radial magnetic bearing 8, be fixed on 24 inner wall of casing, by with main shaft
Magnetic force between 23 carrys out the radial position of fixed main shaft 23, does not contact with main shaft 23, the two (main shaft 23 and radial magnetic bearing
8) annular gap between constitutes the second cooling duct 7 and the 5th cooling duct 14；8 downstream of compressor side radial magnetic bearing
It equipped with thrust magnetic suspension bearing 9, is mounted on 24 inner wall of casing, passes through the magnetic between the thrust disc that is fixed on main shaft 23
Power determines the axial position of main shaft 23, does not contact with thrust disc, the ring between the two (thrust magnetic suspension bearing 9 and thrust disc)
Shape gap constitutes third cooling duct 10；9 downstream of thrust magnetic suspension bearing is equipped with motor stator coil 12, motor stator line
Circle 12 is fixed on casing 24, is not contacted with the rotor 11 being fixed on main shaft 23, the two (motor stator coil 12 and electricity
Machine rotor 11) between annular gap constitute the 4th cooling duct 13.Cooling working medium followed by first, second, third, the
Four, the 5th and the 6th cooling duct 5,7,10,13,14,15, cooling motor stator coil 12 and main shaft 23, subsequently enter cold and hot
Working medium mixing chamber 16.
The cold and hot working medium mixing chamber 16 is by 15 exit end face of the 6th cooling duct, main shaft 23, turbo wheel 20, casing
24 and turbine side can wear graphite labyrinth seal 3 and surround jointly, via the 6th cooling duct 15 outflow cooling working medium will
The ring-shaped graphite seal and turbine leaf of graphite labyrinth seal 3 can be worn by carrying on the back leakage-gap 19 and turbine side via turbo wheel wheel
The high temperature refrigerant that radial clearance between wheel wheel back side sealing tooth enters blocks in the chamber, and via being arranged in above chamber
Gas vent 17 be discharged, which can prevent high temperature refrigerant from entering cooling duct damage bearing, coil and main shaft etc., and nothing
Additional exhaust equipment is needed, the complexity of power part coolant seal insulation system is reduced.
The insulating sleeve 18 passes through interference fit or thread connecting mode cloth between main shaft 23 and turbo wheel 20
It is placed in 23 end face of main shaft, 23 end face of main shaft, which is located at central axes, is provided with location hole, and insulating sleeve 18 is inside from 23 end of main shaft
Extend, until the cold and hot 16 place main shaft lateral side regions of working medium mixing chamber of 18 lateral surface of insulating sleeve covering, and insulating sleeve 18
Medial surface covers main shaft positioned internal hole side.The insulating sleeve 18 is complete by main shaft 23 and high-pressure heated fluid and turbo wheel 20
It separates entirely, avoids directly contacting with main shaft 23.Connecting rod 22 is connected through a screw thread mode and is connected with main shaft 23,23 center line of main shaft
It is overlapped with 22 center line of connecting rod, turbo wheel 20 is fixed at 23 location hole of main shaft by interference fit type, with collet
Cylinder 18 contacts, and radial positioning, and connecting rod 22 runs through turbo wheel 20, and turbo wheel 20 is not contacted with connecting rod 22, it is described every
Thermally induced flow nut 21 is arranged in 20 outlet end of turbo wheel and is connected with 22 extension end of connecting rod, for fixing 20 axis of turbo wheel
To position, which can reduce turbo wheel 20 and high temperature refrigerant is transmitted to the heat of main shaft, improve the safety of power part.
Embodiment 2
Referring to fig. 2, the insulating sleeve 18 is connected between main shaft 23 and turbo wheel 20 by interference fit or screw thread
The mode of connecing is arranged in 23 end face of main shaft, and insulating sleeve 18 extends internally from 23 end of main shaft, until 18 side of insulating sleeve covers
Cold and hot 16 place main shaft lateral side regions of working medium mixing chamber.The insulating sleeve 18 is by main shaft 23 and high-pressure heated fluid and turbine leaf
It takes turns 20 completely separated, avoids directly contacting with main shaft 23.The connecting rod 22 is fixed on main shaft 23,23 center line of main shaft and company
22 center line of extension bar is overlapped.Turbo wheel 20 is connected by interference fit type with insulating sleeve 18, and connecting rod 22 runs through turbine
Impeller, turbo wheel 20 are not contacted with connecting rod 22, the heat-insulated water conservancy diversion nut 21 be arranged in 20 outlet end of turbo wheel and with
22 extension end of connecting rod is connected, for fixing the axial position of turbo wheel 20.
Compared with Example 1, connecting rod 22 is integrated with main shaft 23 in embodiment 2, the 23 central axes hole Chu Wuding of main shaft, system
Make that processing is more simple and convenient, but insulating sleeve 18 and 20 contact area of turbo wheel are larger in embodiment 2, to main shaft 23 every
It decreases from effect.
In the above various embodiments, cooling working medium is to carry on the back leakage-gap 2 and compressor side via compressor impeller wheel to wear
Enter the supercritical carbon dioxide working medium of the high pressure low temperature of cooling duct inside graphite labyrinth seal 3, cooling working medium flows successively through
First cooling duct, 5 to the 6th cooling duct 15, cooling electrical-coil and main shaft, while will in 15 exit of the 6th cooling duct
The overcritical dioxy of the high temperature entered inside graphite labyrinth seal 3 can be worn by carrying on the back leakage-gap 19 and turbine side by turbo wheel wheel
Change carbon working medium to block in cold and hot working medium mixing chamber 16, prevents high temperature refrigerant from entering cooling duct damage bearing, coil and master
Axis etc..The mixed working fluid blocked in cold and hot working medium mixing chamber 16 is expelled to recycle system coolers high temperature via gas vent 17
Side entrance comes back to circulatory system compressor impeller inlet after exchanging with cooler cold end working medium completion heat and continues to participate in
System circulation.
Claims (10)
1. a kind of supercritical carbon dioxide Brayton cycle power part coolant seal insulation system, it is characterised in that: the power
Component coolant seal insulation system includes casing (24) and the main shaft (23) being set in casing (24), the casing (24)
Both ends are provided with labyrinth seal, the labyrinth seal of casing (24) one end and the compressor impeller (1) for being set to main shaft (23) one end
It matches, the labyrinth seal of casing (24) other end is matched with the turbo wheel (20) for being set to main shaft (23) other end, machine
There are annular gap between shell (24) and main shaft (23), one end of annular gap by the radial clearance of corresponding end labyrinth seal with
Compressor impeller wheel back leakage-gap (2) is connected, and the other end of annular gap is provided with cold and hot working medium mixing chamber (16), cold
Hot working fluid mixing chamber (16) is connected by the radial clearance of corresponding end labyrinth seal with turbo wheel wheel back leakage-gap (19)
It is logical, the gas vent (17) being connected with cold and hot working medium mixing chamber (16), gas vent (17) and setting are provided on casing (24)
It is connected in the cooler of casing (24) outside.
2. a kind of supercritical carbon dioxide Brayton cycle power part coolant seal insulation system according to claim 1,
It is characterized by: the annular gap includes entering in casing (24) for that will carry on the back leakage-gap (2) from compressor impeller wheel
Leakage stream is along the first cooling duct (5) being sequentially communicated conveyed towards cold and hot working medium mixing chamber (16) direction, the second cooling
Channel (7), third cooling duct (10), the 4th cooling duct (13), the 5th cooling duct (14) and the 6th cooling duct (15)；
First cooling duct (5) and the 6th cooling duct (15) are the protection bearing (6) and main shaft being set on casing (24)
(23) gap between；Second cooling duct (7) and the 5th cooling duct (14) are the radial direction being set on casing (24)
Gap between magnetic suspension bearing (8) and main shaft (23)；The third cooling duct (10) is to be set to pushing away on casing (24)
Gap between power magnetic suspension bearing (9) and the thrust disc being set on main shaft (23)；4th cooling duct (13) is to set
Gap between the motor stator coil (12) being placed on casing (24) and the rotor (11) being set on main shaft (23).
3. a kind of supercritical carbon dioxide Brayton cycle power part coolant seal insulation system according to claim 2,
It is characterized by: the cold and hot working medium mixing chamber (16) by the 6th cooling duct (15) exit end face, main shaft (23), thoroughly
Flat impeller (20), corresponding end labyrinth seal and casing (24) surround jointly；The gas vent (17) is arranged in cold and hot working medium
In casing (24) corresponding region above mixing chamber (16).
4. a kind of supercritical carbon dioxide Brayton cycle power part coolant seal insulation system according to claim 1,
It is characterized by: between the high pressure cold fluid and the back leakage of turbo wheel wheel of compressor impeller wheel back leakage-gap (2) leakage
The high-pressure heated fluid of gap (19) leakage is mixed in cold and hot working medium mixing chamber (16), and gas vent (17) is drawn by the cooler
To the working medium entrances side of compressor impeller (1).
5. a kind of supercritical carbon dioxide Brayton cycle power part coolant seal insulation system according to claim 1,
It is characterized by: be fixed with pin (4) on the end face of the casing (24), pin (4) and it is set on labyrinth seal casing side
Interporal lacuna cooperation.
6. a kind of supercritical carbon dioxide Brayton cycle power part coolant seal insulation system according to claim 1,
It is characterized by: the labyrinth seal includes that contact with corresponding casing (24) end face annular wears seal, compressor
The wheel back side of impeller (1) and turbo wheel (20), which is provided with, wears the interior of seal with casing (24) corresponding end labyrinth seal
Enclose the radial seal tooth of contact.
7. a kind of supercritical carbon dioxide Brayton cycle power part coolant seal insulation system according to claim 1,
It is characterized by: the power part coolant seal insulation system further includes insulating sleeve (18) and connecting rod (22), it is heat-insulated
Sleeve (18) is set between main shaft (23) and turbo wheel (20), and connecting rod (22) runs through turbo wheel (20), connecting rod
(22) one end for stretching out turbo wheel (20) is provided with heat-insulated fair water cone, and the other end of connecting rod (22) is connected with main shaft (23).
8. a kind of supercritical carbon dioxide Brayton cycle power part coolant seal insulation system according to claim 7,
It is characterized by: the insulating sleeve (18) is set on main shaft (23) by interference fit or thread connecting mode, collet
Main shaft (23) lateral side regions where cylinder (18) extends inwardly to the cold and hot working medium mixing chamber (16) of covering from main shaft (23) end.
9. a kind of supercritical carbon dioxide Brayton cycle power part coolant seal insulation system according to claim 7,
It is connected or is fixed on main shaft (23) with main shaft (23) it is characterized by: the connecting rod (22) is connected through a screw thread mode, it is main
Axis (23) center line is overlapped with connecting rod (22) center line, and turbo wheel (20) passes through interference fit type and insulating sleeve (18)
It is connected, turbo wheel (20) is not contacted with connecting rod (22).
10. a kind of supercritical carbon dioxide Brayton cycle power part coolant seal insulation system according to claim 7,
It is characterized by: the insulating sleeve (18) uses metal material, heat-insulated fair water cone uses lid formula nut.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821014675.1U CN208564662U (en) | 2018-06-28 | 2018-06-28 | Supercritical carbon dioxide Brayton cycle power part coolant seal insulation system |
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| CN201821014675.1U CN208564662U (en) | 2018-06-28 | 2018-06-28 | Supercritical carbon dioxide Brayton cycle power part coolant seal insulation system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625917A (en) * | 2018-06-28 | 2018-10-09 | 西安交通大学 | A kind of supercritical carbon dioxide Brayton cycle power part coolant seal insulation system |
| CN110671165A (en) * | 2019-11-13 | 2020-01-10 | 重庆江增船舶重工有限公司 | High-speed expander of inflation electricity generation integral type |
| CN111547251A (en) * | 2020-04-13 | 2020-08-18 | 西安交通大学 | a turbo cooler |
| CN109944757B (en) * | 2019-04-22 | 2023-08-01 | 西安交通大学 | A kind of solar thermal power generation system and working method applied in space environment |
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2018
- 2018-06-28 CN CN201821014675.1U patent/CN208564662U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625917A (en) * | 2018-06-28 | 2018-10-09 | 西安交通大学 | A kind of supercritical carbon dioxide Brayton cycle power part coolant seal insulation system |
| CN108625917B (en) * | 2018-06-28 | 2024-05-24 | 西安交通大学 | A cooling, sealing and heat insulation system for supercritical carbon dioxide Brayton cycle power components |
| CN109944757B (en) * | 2019-04-22 | 2023-08-01 | 西安交通大学 | A kind of solar thermal power generation system and working method applied in space environment |
| CN110671165A (en) * | 2019-11-13 | 2020-01-10 | 重庆江增船舶重工有限公司 | High-speed expander of inflation electricity generation integral type |
| CN111547251A (en) * | 2020-04-13 | 2020-08-18 | 西安交通大学 | a turbo cooler |
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