CN104728170A - Gas compressor frequency adjustment structure - Google Patents
Gas compressor frequency adjustment structure Download PDFInfo
- Publication number
- CN104728170A CN104728170A CN201510134747.0A CN201510134747A CN104728170A CN 104728170 A CN104728170 A CN 104728170A CN 201510134747 A CN201510134747 A CN 201510134747A CN 104728170 A CN104728170 A CN 104728170A
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- CN
- China
- Prior art keywords
- blade root
- frequency modulation
- blade
- gas compressor
- root
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
- F04D29/324—Blades
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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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
Abstract
The invention relates to the technical field of combustion gas turbines, in particular to a gas compressor frequency adjustment structure. The gas compressor frequency adjustment structure comprises a gas compressor blade and a blade root arranged at the bottom of the gas compressor blade; frequency adjustment holes are formed in the bottom of the blade root, and the blade root comprises a blade root bottom, a blade root neck portion and a blade root top; the blade root neck portion is arranged between the blade root bottom and the blade root top, and the depths of the frequency adjustment holes are larger than the distance from the blade root neck portion to the blade root bottom. According to the gas compressor frequency adjustment structure, by the arrangement of the frequency adjustment holes, the quality and the distribution of rigidity of the gas compressor blade are changed, a fast frequency adjustment is achieved after the blade is processed and manufactured, the processing is simple, the fast frequency adjustment is easy to achieve, and the vibration reliability of a product is improved; the gas compressor frequency adjustment structure has an advantage of being simple in structure.
Description
Technical field
The present invention relates to gas turbine technology field, particularly relate to a kind of gas compressor frequency modulation structure, particularly a kind of gas compressor frequency modulation structure can carrying out frequency adjustment quickly and easily.
Background technique
During rotating machinery blade working, the effect being constantly subject to pulse pneumatic power makes blade vibration.Particularly when excitation force frequency and Natural Frequency of Blade are mutually integral multiple, resonance will be caused, even damaged blade.For blade design, usually estimated the natural frequency of vibration of blade by theory calculate, determined the frequency safety of blade by test.The more important thing is and leave vibration damping and frequency modulation means at the beginning of blade design.
The adjustment of prior art Leaf frequency or the Main Means of vibration damping are: change blade thickness, before and after blade stator blade non-uniform Distribution, Ye Ding adds shroud (integral shroud), blade adds band (lacing wire), blade root adds damping pin, blade root double tenon structure.Frequency modulation can also be realized by changing pin hole gap to pin type leaf dish Connecting format or prong type blade root.
For the blade manufactured, to be tested or test run determine its natural frequency can not meet avoid rate require time, in order to the size making it not affect aeroperformance and adjacent structure, frequency adjustment means are very limited, particularly for not being with hat non-cooled solid vane, as gas turbine blower frequency modulation structure, the method changing the blade natural frequency of vibration is less, and frequency adjustment range is also narrower.Will inevitably the design cycle be extended as redesigned blade, increasing design cost, weaken competitive ability; As can not effective frequency modulation, then blade can be made under the effect of the oscillating load of centrifugal force and alternation to produce fatigue crack, when Crack Extension to a certain extent, when residual area is not enough to bear centrifugal force, blade will fracture.
In view of the defect of above-mentioned prior art, need to provide a kind of gas compressor frequency modulation structure can carrying out frequency adjustment quickly and easily.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is the existing blade manufactured, to be tested or test run determine its natural frequency can not meet avoid rate require time, in order to the size making it not affect aeroperformance and adjacent structure, frequency adjustment means very limited.Will inevitably the design cycle be extended as redesigned blade, increasing design cost, weaken competitive ability; As can not effective frequency modulation, then blade can be made under the effect of the oscillating load of centrifugal force and alternation to produce the problems such as fatigue crack.
(2) technological scheme
In order to solve the problems of the technologies described above, the invention provides a kind of gas compressor frequency modulation structure, comprise compressor blade and be arranged at the blade root bottom compressor blade, the bottom of described blade root is provided with frequency modulation hole, described blade root comprises bottom blade root, blade neck and blade root top, described blade neck is arranged at bottom described blade root and between blade root top, and the degree of depth in described frequency modulation hole is greater than the distance bottom described blade neck to described blade root.
Further, one end of described blade root is blade root air inlet end face, and the other end is that blade root is given vent to anger end face, and the give vent to anger distance of end face of blade root air inlet end face and blade root described in described frequency modulation pitch-row is greater than 2 times of the diameter of the trailing edge of the root of described compressor blade.
Further, described frequency modulation hole is circle, parallelogram, triangle or ellipse.
Further, described frequency modulation hole is parallelogram, and a limit parallel and described blade root air inlet end face in described frequency modulation hole or described blade root are given vent to anger end face.
Further, described frequency modulation hole is arranged perpendicular to bottom described blade root or with becoming angle bottom described blade root, and the degree of depth in described frequency modulation hole is greater than the diameter of the leading edge of the root of described compressor blade apart from the distance at described blade root top.
Further, described frequency modulation hole is single or multiple, and is less than 2/3 of the width of described blade neck along the width of its circumference.
Further, described blade root is dove-tail form.
Present invention also offers a kind of gas compressor locking mechanism, comprise above-mentioned gas compressor frequency modulation structure, it is characterized in that: also comprise the wheel disc being provided with locking plate, described wheel disc is connected with described compressor blade by described frequency modulation hole and locking plate.
(3) beneficial effect
Technique scheme tool of the present invention has the following advantages: the bottom of the blade root in gas compressor frequency modulation structure provided by the invention is provided with frequency modulation hole, blade root comprises bottom blade root, blade neck and blade root top, blade neck is arranged at bottom blade root and between blade root top, the degree of depth in frequency modulation hole is greater than the distance bottom blade neck to blade root.Changed quality and the Stiffness Distribution of compressor blade in gas compressor frequency modulation structure provided by the invention by the setting in frequency modulation hole, can realize frequency modulation fast after blade processing manufacture, processing is simple, easily realizes, improves the vibration reliability of product; There is the simple advantage of structure.
Accompanying drawing explanation
Fig. 1 is the perspective view of embodiment of the present invention gas compressor frequency modulation structure;
Fig. 2 is the plan view of embodiment of the present invention gas compressor frequency modulation structure;
Fig. 3 is the partial bottom view of embodiment of the present invention gas compressor frequency modulation structure;
Fig. 4 is the partial front elevation view of embodiment of the present invention gas compressor frequency modulation structure;
Fig. 5 is the partial side view of embodiment of the present invention gas compressor frequency modulation structure.
In figure: 1: compressor blade; 2: blade root; 3: frequency modulation hole; 11: leading edge; 12: trailing edge; 21: blade root air inlet end face; 22: blade root is given vent to anger end face; 23: bottom blade root; 24: blade neck; 25: blade top.
Embodiment
In describing the invention, except as otherwise noted, the implication of " multiple " is two or more; Term " on ", D score, "left", "right", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the machine of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
As shown in Figures 1 to 5, gas compressor frequency modulation structure provided by the invention, comprise compressor blade 1 and be arranged at the blade root 2 bottom compressor blade 1, blade root 2 described in the present embodiment is dove-tail form.The bottom of described blade root 2 is provided with frequency modulation hole 3, described blade root 2 to comprise bottom blade root 23, blade neck 24 and blade root top 25, described blade neck 24 is arranged at bottom described blade root between 23 and blade root top 25, the distance that the degree of depth in described frequency modulation hole 3 is greater than bottom described blade neck 24 to described blade root 23.Changed quality and the Stiffness Distribution of compressor blade in gas compressor frequency modulation structure provided by the invention by the setting in frequency modulation hole, can realize frequency modulation fast after blade processing manufacture, processing is simple, easily realizes, improves the vibration reliability of product; There is the simple advantage of structure.
One end of blade root 2 described in the present embodiment is blade root air inlet end face 21, the other end is that blade root is given vent to anger end face 22, described frequency modulation hole 3 is greater than 2 times of the diameter of trailing edge 12 apart from the give vent to anger distance of end face 22 of described blade root air inlet end face 21 and blade root, simultaneously large as far as possible for ensureing the adjustment range of the 3 pairs of frequencies in frequency modulation hole, frequency modulation hole 3 degree of depth is greater than the distance of 23 distance blade necks 24 bottom blade root.2 times of the diameter of the trailing edge 12 in the cross section of the root of compressor blade 1 described in the present embodiment.
Described in gas compressor frequency modulation structure provided by the invention, frequency modulation hole 3 is circle, parallelogram, triangle or ellipse.Described frequency modulation hole 3 is parallelogram, and the parallel and described blade root air inlet in a limit end face 21 in described frequency modulation hole 3 or described blade root are given vent to anger end face 22.Described frequency modulation hole 3 is perpendicular to bottom described blade root 23 or arrange with 23 one-tenth angles bottom described blade root, and the degree of depth in described frequency modulation hole 3 is greater than the diameter of the leading edge 11 in the cross section of the root of described compressor blade 1 apart from the distance at described blade root top 25.
The hole of frequency modulation described in the present embodiment 3 is single or multiple, and the degree of depth in multiple frequency modulation hole 3 can be identical, also can be different.In order to make the 3 pairs of blade necks 24 in frequency modulation hole weakening less, frequency modulation hole 3 is less than 2/3 of the width of described blade neck 24 along the width of frequency modulation hole 3 circumference.
Present invention also offers gas compressor locking mechanism, comprise above-mentioned gas compressor frequency modulation structure, it is characterized in that: also comprise the wheel disc being provided with locking plate, described wheel disc is connected with described compressor blade 1 by described frequency modulation hole 3 and locking plate.Wheel disc and described blade root 2 are connected by locking plate and described frequency modulation hole 3 and realize locating, and namely one end of locking plate is fixed on wheel disc, and the other end is fixed in described frequency modulation hole 3.
When gas compressor frequency modulation structure of the present invention uses, changed quality and the Stiffness Distribution of compressor blade in gas compressor frequency modulation structure provided by the invention by the setting in frequency modulation hole, frequency modulation fast can be realized after blade processing manufacture.
In sum, the present invention has the following advantages: the bottom of the blade root in gas compressor frequency modulation structure provided by the invention is provided with frequency modulation hole, blade root comprises bottom blade root, blade neck and blade root top, blade neck is arranged at bottom blade root and between blade root top, the degree of depth in frequency modulation hole is greater than the distance bottom blade neck to blade root.Changed quality and the Stiffness Distribution of compressor blade in gas compressor frequency modulation structure provided by the invention by the setting in frequency modulation hole, can realize frequency modulation fast after blade processing manufacture, processing is simple, easily realizes, improves the vibration reliability of product; There is the simple advantage of structure.
Above embodiment only in order to technological scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technological scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technological scheme.
Claims (8)
1. a gas compressor frequency modulation structure, it is characterized in that: comprise compressor blade (1) and be arranged at the blade root (2) bottom compressor blade (1), the bottom of described blade root (2) is provided with frequency modulation hole (3), described blade root (2) comprises (23) bottom blade root, blade neck (24) and blade root top (25), described blade neck (24) to be arranged at bottom described blade root between (23) and blade root top (25), the degree of depth of described frequency modulation hole (3) is greater than the distance of (23) bottom described blade neck (24) to described blade root.
2. gas compressor frequency modulation structure according to claim 1, it is characterized in that: one end of described blade root (2) is blade root air inlet end face (21), the other end is that blade root is given vent to anger end face (22), and described frequency modulation hole (3) is greater than 2 times of the diameter of the trailing edge (12) of the root of described compressor blade (1) apart from the give vent to anger distance of end face (22) of described blade root air inlet end face (21) and blade root.
3. gas compressor frequency modulation structure according to claim 2, is characterized in that: described frequency modulation hole (3) is circle, parallelogram, triangle or ellipse.
4. gas compressor frequency modulation structure according to claim 3, it is characterized in that: described frequency modulation hole (3) is parallelogram, a parallel and described blade root air inlet in limit end face (21) of described frequency modulation hole (3) or described blade root are given vent to anger end face (22).
5. gas compressor frequency modulation structure according to claim 1, it is characterized in that: described frequency modulation hole (3) becomes angle to arrange perpendicular to (23) bottom described blade root or with (23) bottom described blade root, the degree of depth of described frequency modulation hole (3) is greater than the diameter of the leading edge (11) of the root of described compressor blade (1) apart from the distance of described blade root top (25).
6. gas compressor frequency modulation structure according to claim 1, is characterized in that: described frequency modulation hole (3) for single or multiple, and is less than 2/3 of the width of described blade neck (24) along the width of its circumference.
7. gas compressor frequency modulation structure according to claim 1, is characterized in that: described blade root (2) is dove-tail form.
8. a gas compressor locking mechanism, comprise the gas compressor frequency modulation structure as described in claim 1-7 any one, it is characterized in that: also comprise the wheel disc being provided with locking plate, described wheel disc is connected with described compressor blade (1) by described frequency modulation hole (3) and locking plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510134747.0A CN104728170A (en) | 2015-03-25 | 2015-03-25 | Gas compressor frequency adjustment structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510134747.0A CN104728170A (en) | 2015-03-25 | 2015-03-25 | Gas compressor frequency adjustment structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104728170A true CN104728170A (en) | 2015-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510134747.0A Pending CN104728170A (en) | 2015-03-25 | 2015-03-25 | Gas compressor frequency adjustment structure |
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| CN (1) | CN104728170A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837866A (en) * | 2016-09-12 | 2017-06-13 | 东莞市卓奇电子科技有限公司 | Noise-and-vibration-reduction impeller |
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| US20040191068A1 (en) * | 2003-03-28 | 2004-09-30 | Christoph Richter | Moving-blade row for fluid-flow machines |
| TW200508502A (en) * | 2003-05-28 | 2005-03-01 | Sony Corp | Thin fan motor |
| CN2714854Y (en) * | 2004-05-18 | 2005-08-03 | 常熟市鼓风机有限公司 | Bidirectional propeller fan |
| CN100419218C (en) * | 2004-04-01 | 2008-09-17 | 通用电气公司 | Frequency-tuned compressor stator blade and related method |
| CN201802443U (en) * | 2010-08-05 | 2011-04-20 | 成都市成航发工艺有限公司 | Flue gas turbine rotor |
| CN204716615U (en) * | 2015-03-25 | 2015-10-21 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | A kind of gas compressor frequency modulation structure and apply the gas compressor locking mechanism of this structure |
-
2015
- 2015-03-25 CN CN201510134747.0A patent/CN104728170A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040191068A1 (en) * | 2003-03-28 | 2004-09-30 | Christoph Richter | Moving-blade row for fluid-flow machines |
| TW200508502A (en) * | 2003-05-28 | 2005-03-01 | Sony Corp | Thin fan motor |
| CN100419218C (en) * | 2004-04-01 | 2008-09-17 | 通用电气公司 | Frequency-tuned compressor stator blade and related method |
| CN2714854Y (en) * | 2004-05-18 | 2005-08-03 | 常熟市鼓风机有限公司 | Bidirectional propeller fan |
| CN201802443U (en) * | 2010-08-05 | 2011-04-20 | 成都市成航发工艺有限公司 | Flue gas turbine rotor |
| CN204716615U (en) * | 2015-03-25 | 2015-10-21 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | A kind of gas compressor frequency modulation structure and apply the gas compressor locking mechanism of this structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837866A (en) * | 2016-09-12 | 2017-06-13 | 东莞市卓奇电子科技有限公司 | Noise-and-vibration-reduction impeller |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20150624 |