CN111664121A - Centrifugal compressor blade diffuser adjusting mechanism and control method thereof - Google Patents
Centrifugal compressor blade diffuser adjusting mechanism and control method thereof Download PDFInfo
- Publication number
- CN111664121A CN111664121A CN202010450565.5A CN202010450565A CN111664121A CN 111664121 A CN111664121 A CN 111664121A CN 202010450565 A CN202010450565 A CN 202010450565A CN 111664121 A CN111664121 A CN 111664121A
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- Prior art keywords
- blade
- diffuser
- cap
- angle
- centrifugal compressor
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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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/462—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps
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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
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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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
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes
Abstract
The invention discloses a centrifugal compressor blade diffuser adjusting mechanism and a control method thereof, which are applicable to the field of compressed air energy storage system centrifugal compressor testing. The invention has the main advantages that the blade diffuser adjusting mechanism is manually adjusted, and a complex actuating mechanism, a transmission link mechanism and the like are not arranged, so that the complexity of the device is reduced, and the interference on the flow field in the volute can be avoided; the blade diffuser adjusting mechanism is provided with a dial, a metal pointer and the like, so that control errors caused by an actuating mechanism can be avoided, and the accuracy of a compressor test result is improved.
Description
Technical Field
The invention belongs to the technical field of compressed air energy storage centrifugal compressor testing, relates to a blade diffuser adjusting mechanism, and particularly relates to a centrifugal compressor blade diffuser adjusting mechanism capable of being adjusted manually and a control method thereof.
Background
Compressed air energy storage is considered as one of the most promising large-scale physical energy storage technologies, and a centrifugal compressor is usually selected as the compressor used in the system. The adjustable vane diffuser is one of the main parts of the centrifugal compressor, the performance of the adjustable vane diffuser has important influence on the efficiency, the pressure ratio, the operating condition range and the like of the whole compressor, and the pneumatic performance experiment and detection are necessary to be carried out to meet the requirements of a compressed air energy storage system on high efficiency and wide operating conditions.
The structure of the commonly used adjustable vane diffuser in the prior centrifugal compressor is that a rotating shaft is arranged in the middle of a diffuser vane and is rotationally adjusted through a connecting rod mechanism, and an actuating mechanism adopts a pneumatic or electric type. However, during the centrifugal compressor test, there are the following problems: (1) the pneumatic or electric actuating mechanism has low control precision, and the actual functional relation between the stroke of the actuating mechanism and the angle of the diffuser has larger deviation from a theoretical value, so that the error of a test result is larger; (2) the connecting rod penetrates through the volute to be connected with the actuating mechanism, and the flow field in the volute is interfered, so that the error of a test result is large.
Disclosure of Invention
In view of the above disadvantages and shortcomings in the prior art, an object of the present invention is to provide a centrifugal compressor vane diffuser adjustment mechanism and a control method thereof, which can realize independent adjustment of the installation angle of each diffuser vane, thereby avoiding interference of a link mechanism on the flow field inside the volute and control errors caused by an execution mechanism, and effectively improving the accuracy of the centrifugal compressor test result.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a centrifugal compressor vane diffuser adjusting mechanism comprises an annular mounting plate and a plurality of diffuser vanes uniformly arranged on one side of the annular mounting plate along the circumferential direction,
the annular mounting plate is uniformly provided with a plurality of mounting holes along the circumferential direction, each diffuser blade is correspondingly arranged in each mounting hole one by one through a blade rotating shaft at the bottom of the diffuser blade, each blade rotating shaft is independently provided with a manual angle adjusting device, each manual angle adjusting device comprises a cover cap, a rotating handle and an outer sleeve, wherein,
each outer sleeve is fixedly arranged in one mounting hole, one end of each outer sleeve is used for assembling the blade rotating shaft, the other end of each outer sleeve is used for assembling the cap, the cap is fixedly arranged at the other end of each outer sleeve, the blade rotating shaft is rotatably arranged in the outer sleeves, the tail ends of the blade rotating shafts penetrate through the outer sleeves and the cap and then are positioned at the other side of the annular mounting plate, the rotating handle is fixedly arranged at the tail ends of the blade rotating shafts, a plurality of fastening screws are arranged on the side walls of the caps, when the fastening screws are screwed into the side walls of the blade rotating shafts to be tightly abutted against, the blade rotating shafts are in a locking state, the fastening screws are retreated to be separated from the abutted against the side walls of the blade rotating shafts, the blade rotating shafts are in an unlocking state, and the rotating handle is used for adjusting the installation angle of the diffuser blades when, and after the installation angle of the diffuser blade is adjusted to a target angle by the rotating handle, the blade rotating shaft is locked by the fastening screw.
Preferably, the outer sleeve is fixedly disposed in the mounting hole by a fastener such as a screw, and the cap is fixedly mounted on the outer sleeve by external threads thereof.
Preferably, two ends of the blade rotating shaft are respectively provided with a deep groove ball bearing, a distance sleeve is arranged between the two deep groove ball bearings, the outer end face of one deep groove ball bearing abuts against a step portion in the outer sleeve, and the outer end face of the other deep groove ball bearing abuts against the inner end face of the cap.
Preferably, the end of the blade rotating shaft is provided with an external thread, and the rotating handle is fixedly arranged on the external thread at the end of the blade rotating shaft through the internal thread. After the rotating handle is installed in place, the fastening screws are loosened, the rotating handle can drive the diffuser blades to rotate, and then the installation angles of the diffuser blades can be adjusted.
Preferably, a dial is arranged on the outer end face of the cover cap, a pointer is arranged on the rotating handle, and the pointer and the dial are matched with each other to indicate the angle of the installation angle of the diffuser blades.
Preferably, the number of the set screws between the blade rotating shaft and the cover cap is at least two, so that the diffuser blades are prevented from loosening in the compressor testing process.
Another technical purpose of the present invention is to provide a control method of the vane diffuser adjusting mechanism of the centrifugal compressor, which is characterized in that,
determining diffuser blade design angles: after the manual angle adjusting device is installed in place, the set screws are loosened, and the designed angle position of the diffuser blade on the cover cap dial is determined by utilizing the diffuser blade designed angle tool.
Adjusting the angle of the blade diffuser: manually loosening a set screw between the blade rotating shaft and the cap, driving the diffuser blade to rotate by using a rotating handle, and determining the required angle position of the blade diffuser according to the angle value indicated by a pointer on the rotating handle on the cap dial; after the required angle position of the blade diffuser is determined, the diffuser blade is fixed and the set screw is tightened between the cover caps, so that the testing requirement of the compressor is met.
Compared with the prior art, the centrifugal compressor blade diffuser adjusting mechanism and the control method thereof have the following advantages: (1) the centrifugal compressor vane diffuser adjusting mechanism provided by the invention is manually adjusted, does not have a complex executing mechanism, a transmission connecting rod mechanism and the like, reduces the complexity of the device, and can avoid the interference on the flow field in the volute. (2) The centrifugal compressor blade diffuser adjusting mechanism provided by the invention is provided with a dial, a pointer and the like, can avoid control errors caused by an actuating mechanism, and improves the accuracy of a compressor test result.
Drawings
FIG. 1 is a schematic structural view of a centrifugal compressor vane diffuser adjustment mechanism of the present invention;
FIG. 2 is a schematic view of the overall structure of the manual angle adjustment apparatus according to the present invention;
FIG. 3 is a cross-sectional view of the manual angle adjustment apparatus of the present invention;
FIG. 4 is a schematic view of the structure of the cap of the present invention;
fig. 5 is a schematic structural view of a turning handle in the present invention.
The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
1-annular mounting plate, 2-diffuser blade, 3-cap, 4-rotating handle, 5-outer sleeve, 6-set screw, 7-screw, 8/10-deep groove ball bearing, 9-distance sleeve and 11-bushing.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The structure and technical scheme of the present invention are further described in detail with reference to the accompanying drawings, and an embodiment of the present invention is provided.
Referring to fig. 1 to 5, the centrifugal compressor vane diffuser adjusting mechanism provided by the invention mainly comprises a cap 3, a rotating handle 4, an outer sleeve 5, a set screw 6, a screw 7, a deep groove ball bearing 8/10, a distance sleeve 9, a bushing 11, a plurality of diffuser vanes 2 uniformly arranged on an annular mounting plate 1 along the circumferential direction and the like. Specifically, the centrifugal compressor blade diffuser adjusting mechanism comprises an annular mounting plate 1 and a plurality of diffuser blades 2 uniformly arranged on one side of the annular mounting plate 1 along the circumferential direction, the annular mounting plate 1 is uniformly provided with a plurality of mounting holes along the circumferential direction, each diffuser blade 2 is correspondingly arranged in each mounting hole one by one through a blade rotating shaft at the bottom of the diffuser blade, each blade rotating shaft is independently provided with a manual angle adjusting device, each manual angle adjusting device comprises a cover cap 3, a rotating handle 4 and an outer sleeve 5, wherein each outer sleeve 5 is fixedly arranged in one mounting hole, one end of each outer sleeve 5 is used for assembling the blade rotating shaft, the other end of each outer sleeve 5 is used for assembling the cover cap 3, the cover cap 3 is fixedly arranged at the other end of the outer sleeve 5, the blade rotating shaft is rotatably arranged in the outer sleeve 5, and the tail end of the blade rotating shaft passes through the outer sleeve 5 and the cover cap 3 and then is positioned, rotate the fixed end that sets up at the blade pivot of handle 4, be equipped with a plurality of holding screw 6 on the lateral wall of block 3, holding screw 6 precession to when closely butt with the lateral wall of blade pivot, the blade pivot is in lock-out state, holding screw 6 retreats when breaking away from the butt with the lateral wall of blade pivot, the blade pivot is in unlock-out state, it is used for adjusting diffuser blade 2's angle of erection when the blade pivot is in unlock-out state to rotate handle 4, after rotating handle 4 and adjusting diffuser blade 2's angle of erection to the target angle, through holding screw 6 locking blade pivot.
In the preferred embodiment of the invention, the outer sleeve 5 is fixed on the diffuser annular mounting plate 1 through a screw 7, the cap 3 is installed on the outer sleeve 5 through a screw thread, and the diffuser blade 2 is fixed or loosened with the cap 3 through a fastening screw 6 after passing through the bushing 11, the deep groove ball bearing 10, the distance sleeve 9, the deep groove ball bearing 8 and the cap 3 in the outer sleeve 5. The top of the diffuser blade 2 is provided with an external thread, and after the diffuser blade 2 and the cover cap 3 are fixed by a set screw 6, a rotating handle 4 can be installed; after the rotating handle 4 is installed in place, the set screw 6 is loosened, the rotating handle 4 can drive the diffuser blades 2 to rotate, and then the installation angle of the blade diffuser can be adjusted.
Specifically, the design angle of the vane diffuser needs to be determined before the vane diffuser adjusting mechanism is used, and the specific control method comprises the following steps: the diffuser blade 2 passes through the bushing 11, the deep groove ball bearing 10, the distance sleeve 9, the deep groove ball bearing 8 and the cap 3 in the outer sleeve 5, is fixed with the cap 3 by a set screw 6, and is provided with a rotating handle 4; after the rotating handle 4 is installed in place, the set screw 6 is loosened, and the design angle position of the diffuser blade 2 on the dial of the cap 3 is determined by utilizing the diffuser blade design angle tool.
Specifically, the control method for adjusting the angle of the vane diffuser by the vane diffuser adjusting mechanism comprises the following steps: manually loosening a set screw 6 between the diffuser blade 2 and the cap 3, driving the diffuser blade 2 to rotate by utilizing the rotating handle 4, and determining the required angle position of the blade diffuser according to the angle value indicated by a metal pointer on the rotating handle 4 on the dial disc of the cap 3; after the required angle position of the blade diffuser is determined, a set screw is fastened between the fixed diffuser blade 2 and the cover cap 3, and the testing requirement of the compressor is met.
Referring to fig. 4 and 5, the cap 3 has a dial on the top and the rotating handle 4 is provided with a metal pointer for indicating the vane diffuser angle.
The above description is only a preferred embodiment of the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A centrifugal compressor vane diffuser adjusting mechanism comprises an annular mounting plate and a plurality of diffuser vanes uniformly arranged on one side of the annular mounting plate along the circumferential direction,
the annular mounting plate is uniformly provided with a plurality of mounting holes along the circumferential direction, each diffuser blade is correspondingly arranged in each mounting hole one by one through a blade rotating shaft at the bottom of the diffuser blade, each blade rotating shaft is independently provided with a manual angle adjusting device, each manual angle adjusting device comprises a cover cap, a rotating handle and an outer sleeve, wherein,
each outer sleeve is fixedly arranged in one mounting hole, one end of each outer sleeve is used for assembling the blade rotating shaft, the other end of each outer sleeve is used for assembling the cap, the cap is fixedly arranged at the other end of each outer sleeve, the blade rotating shaft is rotatably arranged in the outer sleeves, the tail ends of the blade rotating shafts penetrate through the outer sleeves and the cap and then are positioned at the other side of the annular mounting plate, the rotating handle is fixedly arranged at the tail ends of the blade rotating shafts, a plurality of fastening screws are arranged on the side walls of the caps, when the fastening screws are screwed into the side walls of the blade rotating shafts to be tightly abutted against, the blade rotating shafts are in a locking state, the fastening screws are retreated to be separated from the abutted against the side walls of the blade rotating shafts, the blade rotating shafts are in an unlocking state, and the rotating handle is used for adjusting the installation angle of the diffuser blades when, and after the installation angle of the diffuser blade is adjusted to a target angle by the rotating handle, the blade rotating shaft is locked by the fastening screw.
2. The centrifugal compressor vane diffuser adjustment mechanism of the preceding claim, wherein the outer sleeve is fixedly disposed in the mounting hole by a fastener, such as a screw, and the cap is fixedly mounted on the outer sleeve by external threads thereof.
3. The centrifugal compressor blade diffuser adjusting mechanism of the above claims, wherein two ends of the blade rotating shaft are respectively provided with a deep groove ball bearing, a distance sleeve is arranged between the two deep groove ball bearings, an outer end surface of one deep groove ball bearing abuts against a step portion in the outer sleeve, and an outer end surface of the other deep groove ball bearing abuts against an inner end surface of the cap.
4. The centrifugal compressor vane diffuser adjustment mechanism of the preceding claim, wherein the tip of the vane spindle is provided with external threads, and the rotating handle is fixedly disposed on the external threads at the tip of the vane spindle through internal threads thereof.
5. The centrifugal compressor blade diffuser adjustment mechanism of the preceding claim, wherein an index dial is provided on the outer end face of the cap, a pointer is provided on the rotating handle, and the pointer and the index dial are mutually engaged to indicate the angle of the installation angle of the diffuser blade.
6. The centrifugal compressor blade diffuser adjustment mechanism of the preceding claim, wherein the number of set screws between the blade shaft and the cap is at least two to prevent the diffuser blade from loosening during compressor testing.
7. A method of controlling a centrifugal compressor vane diffuser adjustment mechanism according to any one of the preceding claims,
determining diffuser blade design angles: after the manual angle adjusting device is installed in place, the set screws are loosened, and the designed angle position of the diffuser blade on the cover cap dial is determined by utilizing the diffuser blade designed angle tool.
Adjusting the angle of the blade diffuser: manually loosening a set screw between the blade rotating shaft and the cap, driving the diffuser blade to rotate by using a rotating handle, and determining the required angle position of the blade diffuser according to the angle value indicated by a pointer on the rotating handle on the cap dial; after the required angle position of the blade diffuser is determined, the diffuser blade is fixed and the set screw is tightened between the cover caps, so that the testing requirement of the compressor is met.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010450565.5A CN111664121B (en) | 2020-05-25 | 2020-05-25 | Centrifugal compressor blade diffuser adjusting mechanism and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010450565.5A CN111664121B (en) | 2020-05-25 | 2020-05-25 | Centrifugal compressor blade diffuser adjusting mechanism and control method thereof |
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| CN111664121A true CN111664121A (en) | 2020-09-15 |
| CN111664121B CN111664121B (en) | 2021-07-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114843208A (en) * | 2022-01-18 | 2022-08-02 | 江苏邑文微电子科技有限公司 | Driving mechanism and semiconductor equipment |
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| CN201696311U (en) * | 2010-05-27 | 2011-01-05 | 河南众力空分设备有限公司 | Centrifugal compressor with variable inlet guide vane and rotatable vane diffuser |
| CN103671286A (en) * | 2012-09-02 | 2014-03-26 | 湖北省风机厂有限公司 | Inlet guide vane regulating mechanism of high pressure fan |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114843208A (en) * | 2022-01-18 | 2022-08-02 | 江苏邑文微电子科技有限公司 | Driving mechanism and semiconductor equipment |
| CN114843208B (en) * | 2022-01-18 | 2024-03-26 | 江苏邑文微电子科技有限公司 | Driving mechanism and semiconductor device |
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| CN111664121B (en) | 2021-07-30 |
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Effective date of registration: 20210207 Address after: 100190, No. 11 West Fourth Ring Road, Beijing, Haidian District Applicant after: Institute of Engineering Thermophysics, Chinese Academy of Sciences Address before: 100081 no.02a-073, block B (second floor), a 28, information road, Haidian District, Beijing Applicant before: Zhongke Halometasone (Beijing) energy saving Technology Co.,Ltd. |
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