CN113958529B - Be used for large-scale axial fan axle to shake orbit test fixture - Google Patents
Be used for large-scale axial fan axle to shake orbit test fixture Download PDFInfo
- Publication number
- CN113958529B CN113958529B CN202111198626.4A CN202111198626A CN113958529B CN 113958529 B CN113958529 B CN 113958529B CN 202111198626 A CN202111198626 A CN 202111198626A CN 113958529 B CN113958529 B CN 113958529B
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- tool
- axial flow
- testing
- base
- flow fan
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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
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A shaft vibration track testing tool for a large-sized axial flow fan belongs to the technical field of shaft vibration track testing of the large-sized axial flow fan. The tool comprises a tool head and a base, wherein a plurality of telescopic rods are arranged between the tool head and the base, the tool head is of a circular ring-shaped structure, a plurality of through holes are uniformly distributed in the circumferential direction of the tool head, the tool head is sleeved on the outer side of a rotating shaft of a tested fan, an eddy current sensor is arranged in the through holes in a penetrating mode, circular ring-shaped sponge is arranged between the eddy current sensor and the inner side wall of the through hole, the shape of the base is identical to that of the tool head, and a plurality of connecting brackets are uniformly distributed on the outer side of the circumference of the base. The tool solves the problem that the shaft vibration track of the large axial flow fan is difficult to measure; the height-adjustable structure is adopted, so that the spatial position of the sensor arrangement is controlled, and the sensor arrangement is convenient and adjustable; the tool is fixed with the inner wall surface of the fan in a welding mode, so that safety accidents are prevented, and the safety of the testing process is ensured.
Description
Technical Field
The invention belongs to the technical field of large axial flow fan shaft vibration track testing, and particularly relates to a tool for testing a large axial flow fan shaft vibration track.
Background
In the field of large axial flow fans, as the rotating speed of the fan is up to 1485r/min and the running time is long, once the fan breaks down, huge property loss can be brought to countries and enterprises. By identifying the shape of the axis track of the fan, the vibration cause of the equipment can be further analyzed, a fault precursor is obtained, and measures are taken in time to prevent the fault from deteriorating.
Currently, non-contact measurement is mostly adopted in the axle center track measuring device in the market, and the measuring method needs to design a bracket to fix the sensor, and measure the axle center track of the rotary machine after the sensors are mutually perpendicular. However, due to the structural specificity of the large axial fan, the motor shaft of the large axial fan is not exposed outside the equipment, so that the axial track of the large axial fan cannot be tested by using a common bracket.
Therefore, in order to solve such problems, it is necessary to design a tool for testing the shaft vibration track of a large axial flow fan, which can provide a more effective solution to such problems.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a tool for testing the shaft vibration track of a large-sized axial flow fan, which can solve the problem that the shaft vibration track of the large-sized axial flow fan is difficult to measure, and is convenient and adjustable and high in safety.
The invention provides the following technical scheme: be used for large-scale axial fan axle to shake orbit test fixture, its characterized in that: including frock head and base, be equipped with a plurality of telescopic links between frock head and the base, the outside in the fan pivot that is surveyed is established to frock head cover, the frock head is ring-shaped structure, and the equipartition has a plurality of through-hole on its circumference direction, wear to be equipped with electric vortex sensor in the through-hole, be equipped with ring-shaped sponge between electric vortex sensor and the through-hole inside wall, the shape of base and frock head is the same, and its circumference outside equipartition has a plurality of linking bridge, the inner fixed mounting of linking bridge is on the lateral wall of base, the linking bridge outer end is installed on the internal face of being surveyed the fan.
The tool for testing the shaft vibration track of the large axial flow fan is characterized in that the connecting support is of a strip-shaped structure.
The tool for testing the shaft vibration track of the large axial flow fan is characterized in that the curvature of the end part of the inner end of the connecting support is the same as that of the outer side wall of the base.
The tool for testing the shaft vibration track of the large axial flow fan is characterized in that the curvature of the end part of the outer end of the connecting bracket is the same as the curvature of the inner wall surface of the fan to be tested.
The tool for testing the shaft vibration track of the large axial flow fan is characterized in that the inner diameter of the annular sponge is the same as the outer diameter of the eddy current sensor.
The tool for testing the shaft vibration track of the large axial flow fan is characterized in that the telescopic rod comprises an upper adjusting rod and a lower adjusting rod sleeved on the outer side of the upper adjusting rod, the lower adjusting rod is of a cylindrical annular structure, a screw lifting mechanism is arranged between the upper adjusting rod and the lower adjusting rod, and the screw lifting mechanism is controlled through handle rotation.
The tool for testing the shaft vibration track of the large axial flow fan is characterized in that the inner diameter of the tool head is larger than the diameter of a rotating shaft of the fan to be tested, and the thickness of the longitudinal section of the tool head is smaller than the length of the eddy current sensor.
The shaft vibration track testing tool for the large axial flow fan is characterized in that the electric vortex sensor is fastened on the head of the tool through two nuts.
By adopting the technology, compared with the prior art, the invention has the following beneficial effects:
the method solves the problem that the shaft vibration track of the large axial flow fan is difficult to measure; the height-adjustable structure is adopted, so that the spatial position of the sensor arrangement is controlled, and the sensor arrangement is convenient and adjustable; the tool is fixed with the inner wall surface of the fan in a welding mode, so that safety accidents are prevented, and the safety of the testing process is ensured.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a structure of a tool mounted on a fan under test according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an installation of an eddy current sensor according to an embodiment of the invention;
fig. 4 is a schematic view of a telescopic rod according to an embodiment of the present invention.
In the figure: 1. a tool head; 2. an eddy current sensor; 3. a telescopic rod; 31. an upper adjusting rod; 32. a lower adjusting rod; 33. a handle; 4. a base; 5. a connecting bracket; 6. annular sponge.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and examples of the present invention. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
On the contrary, the invention is intended to cover any alternatives, modifications, equivalents, and variations as may be included within the spirit and scope of the invention as defined by the appended claims. Further, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. The present invention will be fully understood by those skilled in the art without the details described herein.
Referring to fig. 1-4, a tool for testing shaft vibration track of a large axial flow fan comprises a tool head 1, four eddy current sensors 2, four telescopic rods 3, a base 4 and three connecting brackets 5.
Specifically, the structure of the tool head 1 and the structure of the base 4 are the same, and are of circular structures, the tool head 1 and the base 4 are arranged up and down, and four telescopic rods 3 are uniformly distributed between the tool head 1 and the base 4; four through holes are formed in the tool head 1 along the circumferential direction of the tool head, a circular sponge 6 is arranged on the Kong Nasai, and the eddy current sensor 2 is arranged in the circular sponge 6; the three connecting brackets 5 are uniformly distributed along the outer circumference of the base 4, and the outer end parts of the three connecting brackets are fixedly arranged on the inner wall of the tested fan.
Specifically, the connecting bracket 5 is of a strip-shaped structure, the inner end of the connecting bracket is welded and installed on the outer side wall of the base 4, the curvature of the end part of the inner end is the same as that of the outer side wall of the base 4, the outer end of the connecting bracket is fixedly installed on the inner wall of the tested fan, and the curvature of the end part of the outer end is the same as that of the inner wall surface of the fan.
Specifically, the inner diameter of the annular sponge 6 is the same as the outer diameter of the eddy current sensor 2, the eddy current sensor 2 passes through the through hole on the tool head 1 along the inner wall of the annular sponge 6, the thickness of the longitudinal section of the tool head 1 is smaller than the length of the eddy current sensor 2, each eddy current sensor 2 is provided with two nuts, and the two nuts are matched with the inner side and the outer side of the tool head 1 to lock the eddy current sensor 2.
Specifically, the inner diameter of the tool head 1 is larger than the diameter of the rotating shaft of the tested fan, so that the tool head 1 is conveniently sleeved outside the rotating shaft of the tested fan.
Specifically, the telescopic rod 3 comprises an upper adjusting rod 31 and a lower adjusting rod 32 sleeved outside the upper adjusting rod 31, the lower adjusting rod 32 is of a cylindrical annular structure, a screw lifting mechanism is arranged between the upper adjusting rod 31 and the lower adjusting rod 32, and the screw lifting mechanism is controlled by rotation of a handle 33.
A testing method of a shaft vibration track testing tool of a large axial flow fan comprises the following steps:
1) The method comprises the steps of pre-assembling other parts except the connecting support 5 in the test fixture, confirming the shape and the size of the connecting support 5 according to the surface curvature of the inner wall surface of the tested fan, machining, welding the inner end of the machined connecting support 5 onto the outer side wall of the base 4 in the test fixture, fixedly placing the whole fixture into the tested fan, and welding the outer end of the connecting support 5 on the inner wall surface of the tested fan;
2) The induction height of the eddy current sensor 2 is adjusted by adjusting the length of the telescopic rod length 3; the locking positions of nuts at two sides on the eddy current sensor 2 are adjusted, and the spatial position of the eddy current sensor 2 is ensured by combining the arrangement of the induction heights of the nuts;
3) Connecting the eddy current sensor 2 with a related signal acquisition device;
4) Starting a tested fan, reading the digital signal acquired by the signal acquisition device in 5 seconds after the tested fan works stably, and repeating the reading for three times;
5) And closing the tested fan, removing the connecting bracket 5 after ensuring the environmental safety, and taking out the whole tool to finish the removal.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. Be used for large-scale axial fan axle to shake orbit test fixture, its characterized in that: including frock head (1) and base (4), be equipped with a plurality of telescopic links (3) between frock head (1) and base (4), the outside in being surveyed fan pivot is established to frock head (1) cover, frock head (1) are ring-shaped structure, and the equipartition has a plurality of through-hole in its circumference direction, wear to be equipped with electric vortex sensor (2) in the through-hole, be equipped with ring-shaped sponge (6) between electric vortex sensor (2) and the through-hole inside wall, the shape of base (4) and frock head (1) is the same, and its circumference outside equipartition has a plurality of linking bridge (5), the inner fixed mounting of linking bridge (5) is on the lateral wall of base (4), the inner wall of being surveyed the fan is installed to linking bridge (5) outer end.
2. The tool for testing the shaft vibration track of the large axial flow fan according to claim 1, wherein the connecting support (5) is of a strip-shaped structure.
3. The tool for testing the shaft vibration track of the large axial flow fan according to claim 2, wherein the curvature of the inner end part of the connecting support (5) is the same as the curvature of the outer side wall of the base (4).
4. The tool for testing the shaft vibration track of the large axial flow fan according to claim 3 is characterized in that the curvature of the outer end part of the connecting bracket (5) is the same as the curvature of the inner wall surface of the fan to be tested.
5. The tool for testing the shaft vibration track of the large axial flow fan according to claim 1, wherein the inner diameter of the circular ring-shaped sponge (6) is the same as the outer diameter of the eddy current sensor (2).
6. The tool for testing the shaft vibration track of the large axial flow fan according to claim 1, wherein the telescopic rod (3) comprises an upper adjusting rod (31) and a lower adjusting rod (32) sleeved outside the upper adjusting rod (31), the lower adjusting rod (32) is of a cylindrical annular structure, a screw lifting mechanism is arranged between the upper adjusting rod (31) and the lower adjusting rod (32), and the screw lifting mechanism is controlled through rotation of a handle (33).
7. The tool for testing the shaft vibration track of the large axial flow fan according to claim 1 is characterized in that the inner diameter of the tool head (1) is larger than the diameter of a rotating shaft of the fan to be tested, and the thickness of the longitudinal section of the tool head (1) is smaller than the length of the eddy current sensor (2).
8. A tool for testing the shaft vibration track of a large axial flow fan according to claim 6, characterized in that the eddy current sensor (2) is fastened to the tool head (1) by two nut locks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111198626.4A CN113958529B (en) | 2021-10-14 | 2021-10-14 | Be used for large-scale axial fan axle to shake orbit test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111198626.4A CN113958529B (en) | 2021-10-14 | 2021-10-14 | Be used for large-scale axial fan axle to shake orbit test fixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113958529A CN113958529A (en) | 2022-01-21 |
| CN113958529B true CN113958529B (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111198626.4A Active CN113958529B (en) | 2021-10-14 | 2021-10-14 | Be used for large-scale axial fan axle to shake orbit test fixture |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387575A (en) * | 2008-10-20 | 2009-03-18 | 兖矿国泰化工有限公司 | Rotor bearing system failure perfect information analytical method and apparatus |
| CN101458157A (en) * | 2009-01-07 | 2009-06-17 | 西安交通大学 | Dynamic performance integrated test experimental device for high speed principal axis |
| CN104154853A (en) * | 2014-08-26 | 2014-11-19 | 上海瑞视仪表电子有限公司 | Method for measuring wind driven generator air gap through eddy current sensors |
| CN107314893A (en) * | 2017-05-08 | 2017-11-03 | 上海交通大学 | A kind of modular multi-function rotor testbed |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060288788A1 (en) * | 2005-05-18 | 2006-12-28 | Rajendra Mistry | Systems and devices for reducing slow roll |
-
2021
- 2021-10-14 CN CN202111198626.4A patent/CN113958529B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387575A (en) * | 2008-10-20 | 2009-03-18 | 兖矿国泰化工有限公司 | Rotor bearing system failure perfect information analytical method and apparatus |
| CN101458157A (en) * | 2009-01-07 | 2009-06-17 | 西安交通大学 | Dynamic performance integrated test experimental device for high speed principal axis |
| CN104154853A (en) * | 2014-08-26 | 2014-11-19 | 上海瑞视仪表电子有限公司 | Method for measuring wind driven generator air gap through eddy current sensors |
| CN107314893A (en) * | 2017-05-08 | 2017-11-03 | 上海交通大学 | A kind of modular multi-function rotor testbed |
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| Publication number | Publication date |
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| CN113958529A (en) | 2022-01-21 |
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Address after: 310006 No.18 Chaowang Road, Chaohui 6th District, Gongshu District, Hangzhou City, Zhejiang Province Applicant after: JIANG University OF TECHNOLOGY Applicant after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: 310006 No.18 Chaowang Road, Chaohui 6th District, Gongshu District, Hangzhou City, Zhejiang Province Applicant before: JIANG University OF TECHNOLOGY Applicant before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. |
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