CN106988787B - Rotor blade and turbomachine - Google Patents
Rotor blade and turbomachine Download PDFInfo
- Publication number
- CN106988787B CN106988787B CN201610039820.0A CN201610039820A CN106988787B CN 106988787 B CN106988787 B CN 106988787B CN 201610039820 A CN201610039820 A CN 201610039820A CN 106988787 B CN106988787 B CN 106988787B
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- Prior art keywords
- phase
- blade
- change
- working substance
- wall
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/18—Hollow blades, i.e. blades with cooling or heating channels or cavities; Heating, heat-insulating or cooling means on blades
- F01D5/187—Convection cooling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The present invention relates to a kind of rotor blade and turbomachines, wherein rotor blade includes blade body, and Packed phase-change heat-exchange chamber is set in blade body, phase-change heat-exchange it is intracavitary be partially filled at normal temperature be in on-gaseous phase-change working substance；In the operating condition, the phase-change working substance of on-gaseous, which is flowed and absorbed heat to the blade tip direction of blade body by the effect of centrifugal force, mutually becomes gaseous phase-change working substance, gaseous phase-change working substance is to the flowing of the blade root direction of blade body and exothermic phase becomes the phase-change working substance of on-gaseous, to realize the circulating phase-change heat exchange of phase-change working substance.Phase-change working substance back and forth flows in the intracavitary direction between blade tip and blade root of phase-change heat-exchange to form the Phase cooling of a reciprocation cycle, carries out continuing cooling to rotor blade to realize, improves rotor blade heat transfer effect, effectively increase cooling efficiency.
Description
Technical field
The present invention relates to impeller machinery technical field more particularly to a kind of rotor blades and turbomachine.
Background technique
The runner of turbomachine is usually made of guide vane, movable vane and outer ring, is directly contacted with high-temperature fuel gas, and movable vane is come
It says, while wanting thermally stressed and centrifugal force effect, so must effectively be cooled down.Conventional cooling blade is usually adopted
Cooling structure is set used in blade interior and internal heat is strengthened to impact, in a manner of heat convection etc. by internal cooling air,
And the air film hole being arranged by blade forms one layer of cooling air film in blade surface to reduce outer heat exchange.But due to cooling air
Amount is usually lower, so the blade coefficient of heat transfer is usually lower, when to often result in blade surface temperature excessively high and burn, seriously affect leaf
The safety of wheel mechanical operating and service life.
Summary of the invention
To overcome the above technological deficiency, the technical problem to be solved by the present invention is to provide a kind of rotor blade and turbomachine,
Rotor blade heat transfer effect can be improved, effectively improve cooling efficiency.
In order to solve the above technical problems, the present invention provides a kind of rotor blades comprising blade body, in blade body
If Packed phase-change heat-exchange chamber, phase-change heat-exchange it is intracavitary be partially filled at normal temperature be in on-gaseous phase-change working substance；?
Under working condition, the phase-change working substance of on-gaseous, which is flowed and absorbed heat to the blade tip direction of blade body by the effect of centrifugal force, mutually to be become
Gaseous phase-change working substance, gaseous phase-change working substance is to the flowing of the blade root direction of blade body and exothermic phase becomes the phase transformation of on-gaseous
Working medium, to realize the circulating phase-change heat exchange of phase-change working substance.
Further, rotor blade further includes the cooling structure being arranged at blade root.
Further, cooling structure includes the air-cooled channel led to for cold airflow.
Further, air-cooled channel is serpentine channel.
Further, the inner wall in air-cooled channel is equipped with enhanced heat exchange structure.
Further, enhanced heat exchange structure includes the rib, slot or raised particle extended along the direction in air-cooled channel.
Further, blade body includes blade outer wall and blade inner layer wall, blade outer wall and blade inner layer wall it
Between formed phase-change heat-exchange chamber.
Further, convection current cooling chamber and cooling structure are equipped in blade inner layer wall, cooling structure includes logical for cold airflow
Air-cooled channel, the cold air outlet in air-cooled channel communicates with convection current cooling chamber, and blade body further includes for connecting blade outer layer
The connection rib of wall and blade inner layer wall, connection rib are equipped with the cooling of the outside wall surface of connection convection current cooling chamber and blade outer wall
Hole.
Further, the inner wall of blade outer wall is equipped with enhanced heat exchange structure.
Further, enhanced heat exchange structure includes the rib extended along phase-change working substance flow direction, slot or raised particle.
The present invention also provides a kind of turbomachines comprising above-mentioned rotor blade.
As a result, based on the above-mentioned technical proposal, rotor blade of the present invention in its blade body by being arranged the phase transformation of sealing
Heat exchanging chamber and phase-change heat-exchange it is intracavitary be partially filled under room temperature be in on-gaseous phase-change working substance, rotor blade is in working condition
Lower high speed rotation, gaseous phase-change working substance is flowed to the direction of blade tip under the influence of centrifugal force in phase-change heat-exchange chamber, and is absorbed
The heat of blade body tip region, density reduces simultaneously after the phase-change working substance of on-gaseous mutually becomes gaseous phase-change working substance at this time
It is flowed under the pushing of on-gaseous phase-change working substance to the blade root direction of blade body, and discharges heat to blade body base region
Amount, gaseous phase-change working substance mutually becomes the phase-change working substance of on-gaseous again at this time, and under the influence of centrifugal force again to leaf
The direction flowing of point, thus phase-change working substance back and forth flows to be formed in the intracavitary direction between blade tip and blade root of phase-change heat-exchange
The Phase cooling of one reciprocation cycle carries out rotor blade to continue cooling, improves rotor blade heat transfer effect to realize,
Effectively increase cooling efficiency.Turbomachine provided by the invention correspondingly also has above-mentioned beneficial effect.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description for explaining only the invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is a longitudinal profile structure schematic of rotor blade embodiment of the present invention；
Fig. 2 is a horizontal cross-section structure diagram of rotor blade embodiment of the present invention；
Fig. 3 is rotor blade embodiment of the present invention from blade root to the structural schematic diagram at blade tip visual angle.
Specific embodiment
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
A specific embodiment of the invention be for the ease of to design of the invention, it is solved the technical issues of, constitute skill
The technical characteristic and bring technical effect of art scheme have further description.It should be noted that for these embodiment party
The explanation of formula does not constitute a limitation of the invention simultaneously.In addition, technology involved in the embodiment of present invention described below is special
Sign can be combined with each other as long as they do not conflict with each other.
Convective heat transfer between usual substance and substance is usually influenced by following several respects factor: the physical property of fluid, flowing
State, whether there is phase transformation at heat exchange surface geometry.In above-mentioned factor, fluid has surface film thermal conductance with the presence or absence of phase transformation
It obviously influences, fluid has the state of the surface film thermal conductance under phase change conditions significantly larger than without phase-change, thus uses phase
The surface film thermal conductance that the form of transformation heat carries out blade cooling is higher by several times, than routine than liquid forced-convection heat transfer coefficient
Without phase-change gas forced convection heat exchange be higher by an order of magnitude.
As a result, for the usual lower and blade coefficient of heat transfer of type of cooling cooling air volume of current existing rotor blade
Usual lower technological deficiency, the present invention devise a kind of rotor blade, and rotor blade is close by being arranged in its blade body
The phase-change heat-exchange chamber of envelope and phase-change heat-exchange it is intracavitary be partially filled under room temperature be in on-gaseous phase-change working substance, phase-change working substance exists
The intracavitary direction between blade tip and blade root of phase-change heat-exchange is back and forth flowed to form the Phase cooling of a reciprocation cycle, thus
It realizes and rotor blade is carried out to continue cooling, improve rotor blade heat transfer effect, effectively increase cooling efficiency.
In rotor blade one schematical embodiment of the present invention, as shown in FIG. 1 to 3, rotor blade includes blade
Ontology sets Packed phase-change heat-exchange chamber 3 in blade body, in 3 inner part of phase-change heat-exchange chamber filled at normal temperature in non-
Gaseous phase-change working substance 4；
In the operating condition, the phase-change working substance 4 of on-gaseous is flowed by the effect of centrifugal force to the blade tip direction of blade body
And absorb heat and mutually become gaseous phase-change working substance 4, gaseous phase-change working substance 4 is flowed to the blade root direction of blade body and heat release phase transformation
At the phase-change working substance of on-gaseous, to realize the circulating phase-change heat exchange of phase-change working substance.
In the schematical embodiment, rotor blade in its blade body by being arranged the phase-change heat-exchange chamber 3 of sealing
And the phase-change working substance 4 in on-gaseous at normal temperature is filled in 3 inner part of phase-change heat-exchange chamber, phase-change working substance 4 is under normal temperature state
It can be solid-state or liquid, such as fuse salt, boiling point is lower than the wall surface temperature of rotor blade in normal working conditions.
Rotor blade high speed rotation in the operating condition, work of the gaseous phase-change working substance 4 in centrifugal force in phase-change heat-exchange chamber 3
It is flowed with lower to the direction of blade tip, and absorbs the heat of blade body tip region, to reduce blade body tip region
Temperature, density reduces after the phase-change working substance 4 of on-gaseous mutually becomes gaseous phase-change working substance 4 because of heat absorption at this time, and in not yet phase
It is flowed under the pushing of the on-gaseous phase-change working substance 4 of change to the blade root direction of blade body, due to the temperature of blade body base region
Degree is lower than the temperature of tip region, and gaseous phase-change working substance 4 discharges heat, at this time gaseous phase transformation to blade body base region
Working medium 4 mutually becomes the phase-change working substance 4 of on-gaseous again, and flows again to the direction of blade tip under the influence of centrifugal force, because
And direction of the phase-change working substance 4 in phase-change heat-exchange chamber 3 between blade tip and blade root is back and forth flowed to form a reciprocation cycle
Phase cooling, thus realize to rotor blade carry out continue cooling, improve rotor blade heat transfer effect, effectively increase cold
But efficiency, and circulating cooling avoids the addition of phase-change working substance 4, has saved material.
Temperature difference in order to effectively guarantee blade body base region and tip region it is sufficiently large come so that gaseous phase
Matter of exchanging work 4 mutually becomes the phase-change working substance 4 of on-gaseous again after discharging heat to blade body base region, rotor blade can be with
The cooling structure being arranged at blade root is preferably included, cooling structure can guarantee that the temperature of blade body base region is sufficiently low
Mutually become the phase-change working substance 4 of on-gaseous to guarantee gaseous phase-change working substance 4 again.
It should be noted that depending on the dimensional parameters and phase-change working substance of rotor blade itself whether the setting of cooling body
Cooling knot can not also be arranged in 4 material selection, blade longer for blade and the biggish blade of blade root Temperature Difference Ratio at blade root
Structure.
Wherein, the structure that cooling structure can be cooling using liquid, can also preferably use air-cooled cooling, excellent at one
In the embodiment of choosing, as shown in Figure 1, cooling structure includes the air-cooled channel 5 led to for cold airflow.By the way that air-cooled channel 5 is arranged, from
The cold air that the cold air inlet 7 in air-cooled channel 5 enters can be effectively reduced the temperature of blade body base region, it is easy to accomplish,
Exploitativeness is high.Cooling effect is further improved in order to increase the contact area of cold air and blade body base region, one
Aspect, air-cooled channel 5 are preferably serpentine channel, and the serpentine channel for detour of wriggling can increase air-cooled channel 5 as much as possible and exist
Length in blade body base region；On the other hand, enhanced heat exchange structure 6 is provided preferably on the inner wall in air-cooled channel 5
To increase the inner wall area in air-cooled channel 5, wherein as shown in figure 3, enhanced heat exchange structure can be preferably by air-cooled channel
Rib 61, slot or the raised particle extended along the direction in air-cooled channel is set on 5 inner wall, and certainly, enhanced heat exchange structure is also
It can be other enhanced heat exchange components commonly used in the prior art.
Blade body can be simple layer wall construction, interior to be equipped with phase-change heat-exchange chamber, can also preferably wrap as shown in Figure 1
Blade outer wall 1 and blade inner layer wall 2 are included, forms phase-change heat-exchange chamber 3, the structure between blade outer wall 1 and blade inner layer wall 2
The blade body of form can guarantee the heat exchange area of phase-change heat-exchange chamber 3 under the premise of reducing the volume of phase-change heat-exchange chamber 3, have
Conducive to saving phase-change working substance 4 and realize the light-weight design of rotor blade, save the cost.
As the improvement to above preferred embodiment, as depicted in figs. 1 and 2, convection current cooling chamber is equipped in blade inner layer wall 2
8 and cooling structure, cooling structure includes the air-cooled channel 5 led to for cold airflow, the cold air outlet and convection current cooling chamber in air-cooled channel 5
8 communicate, and blade body further includes the connection rib 9 for connecting blade outer wall 1 and blade inner layer wall 2, and connection rib 9, which is equipped with, to be connected
The cooling hole 10 of the outside wall surface of logical convection current cooling chamber 8 and blade outer wall 1.It is right by setting convection current cooling chamber 8 and cooling hole 10
The base region of blade body carries out cold air after cooling and enters convection current cooling chamber 8, and the cold air of convection current cooling chamber 8 is made to pass through setting
Cooling hole 10 in blade body blade or leaf top flows to the outside wall surface of blade outer wall 1 and forms cooling air in blade surface
Film further decreases the temperature of rotor blade, protects rotor blade.In addition, connection rib 9 is applied not only to setting cooling hole 10 and keeps away
Exempt from convection current cooling chamber 8 and phase-change heat-exchange chamber 3, and is conducive to improve the overall structural strength of rotor blade.
Similarly, in order to increase phase-change working substance and the inner wall contact area of outer wall 1 further improve cooling
Effect, in a preferred embodiment, the inner wall of blade outer wall 1 are equipped with enhanced heat exchange structure, enhanced heat exchange structure
Preferably include rib, slot or the raised particle extended along 4 flow direction of phase-change working substance.Certainly, enhanced heat exchange structure can be with
For other enhanced heat exchange components commonly used in the prior art.
The present invention also provides a kind of turbomachines comprising above-mentioned rotor blade.Due to rotor blade energy of the present invention
Enough improve rotor blade heat transfer effect, effectively improves cooling efficiency.Correspondingly, turbomachine of the present invention also has above-mentioned beneficial
Technical effect, details are not described herein.
The embodiment combined above is described in detail embodiments of the present invention, but the present invention is not limited to be retouched
The embodiment stated.For a person skilled in the art, in the case where not departing from the principle and substance of the present invention spirit
A variety of variations, modification, equivalence replacement and modification is carried out to these embodiments to still fall within protection scope of the present invention.
Claims (7)
1. a kind of rotor blade, which is characterized in that including blade body, Packed phase-change heat-exchange chamber is set in the blade body
(3), in phase-change heat-exchange chamber (3) inner part filled with the phase-change working substance (4) for being at normal temperature in on-gaseous；
In the operating condition, the phase-change working substance (4) of on-gaseous is by the effect of centrifugal force to the blade tip side of the blade body
Mutually become the gaseous phase-change working substance (4) to flowing and absorbing heat, gaseous phase-change working substance (4) the Xiang Suoshu blade body
The flowing of blade root direction and exothermic phase become the phase-change working substance of on-gaseous, to realize that the circulating phase-change of the phase-change working substance changes
Heat；
The blade body includes blade outer wall (1) and blade inner layer wall (2), the blade outer wall (1) and the blade
The phase-change heat-exchange chamber (3) is formed between inner layer wall (2), is equipped in the blade inner layer wall (2) convection current cooling chamber (8) and cooling
Structure, the cooling structure is set at the blade root and the air-cooled channel (5) including leading to for cold airflow, the air-cooled channel
(5) cold air outlet is communicated with the convection current cooling chamber (8), and the blade body further includes for connecting the blade outer wall
(1) and the connection rib (9) of the blade inner layer wall (2), the connection rib (9) be equipped be connected to the convection current cooling chamber (8) and
The cooling hole (10) of the outside wall surface of the blade outer wall (1).
2. rotor blade according to claim 1, which is characterized in that the air-cooled channel (5) is serpentine channel.
3. rotor blade according to claim 1, which is characterized in that the inner wall of the air-cooled channel (5) is equipped with strong
Change heat exchange structure (6).
4. rotor blade according to claim 3, which is characterized in that the enhanced heat exchange structure includes along described air-cooled
Rib (61), slot or the raised particle that the direction in channel extends.
5. rotor blade according to claim 1, which is characterized in that the inner wall of the blade outer wall (1) is equipped with
Enhanced heat exchange structure.
6. rotor blade according to claim 5, which is characterized in that the enhanced heat exchange structure includes along the phase transformation
Rib, slot or the raised particle that working medium (4) flow direction extends.
7. a kind of turbomachine, which is characterized in that including the described in any item rotor blades of claim 1~6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610039820.0A CN106988787B (en) | 2016-01-21 | 2016-01-21 | Rotor blade and turbomachine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610039820.0A CN106988787B (en) | 2016-01-21 | 2016-01-21 | Rotor blade and turbomachine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106988787A CN106988787A (en) | 2017-07-28 |
| CN106988787B true CN106988787B (en) | 2019-05-21 |
Family
ID=59413696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610039820.0A Active CN106988787B (en) | 2016-01-21 | 2016-01-21 | Rotor blade and turbomachine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106988787B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4484859A (en) * | 1980-01-17 | 1984-11-27 | Rolls-Royce Limited | Rotor blade for a gas turbine engine |
| CN2098556U (en) * | 1991-06-01 | 1992-03-11 | 西安交通大学 | Cooling blades of turbine rotor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2693527B2 (en) * | 1988-11-21 | 1997-12-24 | 株式会社東芝 | Blade structure of turbomachine |
-
2016
- 2016-01-21 CN CN201610039820.0A patent/CN106988787B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4484859A (en) * | 1980-01-17 | 1984-11-27 | Rolls-Royce Limited | Rotor blade for a gas turbine engine |
| CN2098556U (en) * | 1991-06-01 | 1992-03-11 | 西安交通大学 | Cooling blades of turbine rotor |
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| Publication number | Publication date |
|---|---|
| CN106988787A (en) | 2017-07-28 |
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Address after: 200241 Minhang District Lianhua Road, Shanghai, No. 3998 Applicant after: China Hangfa commercial aviation engine limited liability company Address before: 200241 Minhang District Lianhua Road, Shanghai, No. 3998 Applicant before: AVIC Commercial Aircraft Engine Co.,Ltd. |
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