CN115979619A - Hydroelectric generating set main shaft center aeration valve test device and test method - Google Patents
Hydroelectric generating set main shaft center aeration valve test device and test method Download PDFInfo
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- CN115979619A CN115979619A CN202310043947.XA CN202310043947A CN115979619A CN 115979619 A CN115979619 A CN 115979619A CN 202310043947 A CN202310043947 A CN 202310043947A CN 115979619 A CN115979619 A CN 115979619A
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- valve
- displacement sensor
- main shaft
- air compensating
- closing
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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
- Y02E10/20—Hydro energy
Abstract
The invention discloses a test device and a test method for a main shaft center aeration valve of a hydroelectric generating set, wherein the test device comprises a supporting component, a simulation action component and a data measurement component; the support assembly comprises an adjustable support rod assembly and a support plate; the simulated action assembly comprises a pull rod penetrating through the supporting plate, and the bottom end of the pull rod is connected with a detachable transition plate; the data measurement assembly comprises a displacement sensor support, a displacement sensor and a tension sensor, the displacement sensor and the tension sensor are electrically connected with the data processing unit, and the data processing unit processes detection data and outputs the processed detection data to the display screen. According to the testing device and the testing method provided by the invention, the opening and closing processes of the air compensating valve during the operation of the unit are simulated, the data such as the action force value, the opening degree, the closing time and the opening time of the air compensating valve are measured, and the relation curve of the opening degree and the vacuum degree of the air compensating valve and the relation curve of the opening degree and the closing time of the air compensating valve are drawn, so that the purpose of qualitatively and quantitatively detecting the performance of the air compensating valve is realized.
Description
Technical Field
The invention belongs to the technical field of hydroelectric generating sets, and particularly relates to a testing device and a testing method for a central aeration valve of a main shaft of a hydroelectric generating set.
Background
The central air compensating valve of the main shaft of the water turbine generator set is an important component of the water turbine generator set and is used for eliminating tail water vacuum in the running process of the set, reducing tail water vortex strips and cavitation erosion and improving the running conditions of the set. In the maintenance process of the hydroelectric generating set, the performance of a central aeration valve of the main shaft needs to be detected, and the main performance of the aeration valve mainly comprises sealing performance, the action flexibility of the aeration valve, the relation between an action threshold and the vacuum degree of tail water, the damping performance of a damping device and the like. Except for sealing performance, no professional performance qualitative and quantitative detection equipment exists for other performances of the gulp valve at present, the existing detection means mainly depends on manual operation of the gulp valve for detection, timing is carried out by means of a stopwatch, whether the action of the gulp valve is flexible or not can be roughly and subjectively judged, whether the resetting time is in a reasonable range or not can be judged, and the method has large detection error and cannot realize quantitative and accurate detection.
In the prior art, chinese patent application with publication number CN217538898U provides a mixed flow type hydroelectric generating set large shaft gulp valve calibration device, which comprises a bracket component and a calibration component, wherein the calibration component comprises a gulp valve, a hook ring detachably connected with the bottom of a valve core of the gulp valve, a hanging scale matched with the hook ring and a winch matched with the hanging scale.
Aiming at the problem, the testing device for the main shaft center aeration valve of the hydroelectric generating set is designed, so that the accurate detection and test of various performances of the aeration valve are realized.
Disclosure of Invention
The invention aims to provide a testing device for a central aeration valve of a main shaft of a hydroelectric generating set, which is used for completing a qualitative and quantitative intelligent detection mode of artificial perception step direction of aeration valve performance detection, realizing more accurate judgment of the aeration valve performance, better discovering the defects of equipment in advance and effectively detecting the assembly quality of the aerated valve after maintenance.
The technical purpose of the invention is realized by the following technical scheme: a test device for a main shaft center aeration valve of a hydroelectric generating set comprises a supporting component, a simulation action component and a data measuring component;
the supporting assembly comprises a plurality of groups of adjustable supporting rod assemblies and a supporting plate connected to the tops of the groups of adjustable supporting rod assemblies;
the simulated action assembly comprises a pull rod penetrating through the supporting plate, the pull rod is in threaded connection with a rotating hand wheel, the bottom end of the pull rod is connected with a detachable transition disc, and the transition disc is used for being connected with an air compensating valve guide cylinder;
the data measurement component comprises a displacement sensor support, a displacement sensor and a tension sensor, the displacement sensor support is connected to the lower portion of the supporting disk, the displacement sensor is connected to the displacement sensor support and between the transition disks, the tension sensor is connected to the transition disks and between the pull rods, a distribution box and a display screen are further installed on the supporting disk, the distribution box supplies power to the displacement sensor, the tension sensor and the display screen, the displacement sensor and the tension sensor are electrically connected with the data processing unit, and the data processing unit outputs detected data to the display screen after processing.
Preferably, the adjustable support rod assembly comprises a universal adjusting foot seat, a lower support rod, an adjusting screw rod and an upper support rod, the universal adjusting foot seat is connected with the lower support rod, the upper support rod is fixedly connected with the support disk, and the supporting rod is in threaded connection with the adjusting screw rod.
Preferably, a level is mounted on the support plate.
Preferably, the data processing unit is further electrically connected to a timer.
The invention also provides a test device and method for the main shaft center aeration valve of the hydroelectric generating set, the test device for the main shaft center aeration valve of the hydroelectric generating set comprises a valve opening test, and the valve opening test comprises the following steps:
s1, mounting a test device on the top of an air compensating valve, and adjusting a support assembly to enable a support disc to be in a horizontal state;
s2, the gulp valve guide cylinder is detachably and rigidly connected with the transition disc;
s3, zeroing data of the displacement sensor and the tension sensor;
s4, operating the rotating hand wheel to drive the pull rod to move upwards to simulate the valve opening action of the air supply valve;
and S5, the tension sensor and the displacement sensor measure the tension value of the pull rod and the displacement stroke of the transition disc in real time and output the tension value and the displacement stroke to the data processing unit, the displacement stroke corresponds to the real-time opening degree of the gulp valve, the data processing unit converts the tension value of the pull rod into the vacuum degree in the gulp valve and combines the gulp valve opening degree data acquired by the displacement sensor to form a relation curve between the opening degree of the gulp valve and the vacuum degree.
Preferably, the method further comprises a valve closing test, wherein the valve closing test comprises the following steps:
s1, an upward external force is given to a pull rod, after the gulp valve reaches the maximum opening degree, the external force is removed to simulate the automatic valve closing action of the gulp valve, and a timer records the valve closing time of the gulp valve from full opening to full closing;
and S2, the displacement sensor measures the displacement stroke of the transition disc in real time and outputs the displacement stroke to the data processing unit, the displacement stroke corresponds to the real-time opening of the gulp valve, and a relation curve of the closing opening of the gulp valve and the closing time is formed by combining the closing time recorded by the timer.
Preferably, a relation curve of the opening degree of the air supply valve and the vacuum degree and a relation curve of the closing opening degree of the air supply valve and the closing time of the air supply valve are respectively compared with a performance curve calibrated by a factory, whether the performance of the air supply valve in the current state meets the requirement of the air supply performance of the center of the main shaft of the water-turbine generator set is judged, and then whether the air supply valve needs to be replaced is judged.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the testing device and the testing method for the central gulp valve of the main shaft of the hydroelectric generating set, provided by the invention, the testing device applies external force to drive the gulp valve to act, the opening and closing processes of the gulp valve during the operation of the hydroelectric generating set are simulated, important data such as the acting force value of the gulp valve, the opening degree of the gulp valve, the closing and opening time of the gulp valve are measured, and a relation curve of the opening degree and the vacuum degree of the gulp valve and a relation curve of the closing degree and the closing time of the gulp valve are drawn, so that the purpose of qualitatively and quantitatively detecting the performance of the gulp valve is realized.
2. According to the test device for the central aeration valve of the main shaft of the hydroelectric generating set, which is provided by the invention, the supporting and adjusting assembly is designed, the level of the test device is adjusted to be consistent with the placement level of the aeration valve, the action of the aeration valve is simulated by the test device to be closer to the running state of the aeration valve, and the measurement of related data is more accurate.
3. According to the test device for the air compensating valve in the center of the main shaft of the hydroelectric generating set, which is provided by the invention, the display screen and the related data processing unit are designed to intelligently process the test measurement data, so that the data captured by the air compensating valve action test can be displayed more visually.
4. The testing device for the main shaft center air replenishing valve of the hydroelectric generating set, provided by the invention, is ingenious in structural design, strong in universality and high in application and popularization values, and the action test requirements of different types of main shaft center air replenishing valves are fully considered in the structural form.
Drawings
Fig. 1 is a schematic front view of an embodiment of the present invention.
FIG. 2 is a schematic side view of an embodiment of the present invention.
Fig. 3 is a schematic perspective view of an embodiment of the present invention.
Fig. 4 is a schematic view of the construction of the adjustable support bar assembly of the present invention.
In the drawings, wherein: 10. a support assembly; 11. an adjustable support bar assembly; 12. a support disc; 13. a level bar; 20. a simulated motion component; 21. a pull rod; 22. rotating a hand wheel; 23. a rotating bearing; 24. a transition disk; 30. a data measurement component; 31. displacement sensor support, 32, displacement sensor; 33. a tension sensor; 34. a distribution box; 35. a display screen; 111. a universal adjusting foot seat; 112. a lower support bar; 113. adjusting the screw rod; 114. an upper support rod; a. an air supply valve; b. a guide cylinder of the aeration valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1 to 4, as a preferred embodiment of the present invention, the present embodiment provides a testing apparatus for a main shaft center aeration valve of a hydro-generator set, which includes a supporting component 10, a simulated action component 20 and a data measuring component 30;
the support assembly 10 comprises four groups of adjustable support rod assemblies 11 and a support plate 12 connected to the tops of the four groups of adjustable support rod assemblies 11, and the four groups of adjustable support rod assemblies 11 are respectively connected to four positions of the support plate 12;
the simulated action assembly 20 comprises a pull rod 21 penetrating through the supporting disc 12, the pull rod 21 is in threaded connection with a rotary hand wheel 22, a rotary bearing 23 is installed on the supporting disc 12, the bottom end of the pull rod 21 is detachably connected with a transition disc 24 through a bolt, the transition disc 24 is used for being connected with an air make-up valve guide cylinder b, and the transition disc 24 and the air make-up valve guide cylinder b can be connected in a buckling mode or a bolt mode so as to be convenient to detach;
the data measurement assembly 30 comprises a displacement sensor support 31, a displacement sensor 32 and a tension sensor 33, the displacement sensor support 31 is connected to the lower portion of the support plate 12, the displacement sensor 32 is connected between the displacement sensor support 32 and the transition plate 34, the tension sensor 33 is connected between the transition plate 24 and the pull rod 21, a distribution box 34 and a display screen 35 are further installed on the support plate 12, the distribution box 34 supplies power to the displacement sensor 32, the tension sensor 33 and the display screen 35, the displacement sensor 32 and the tension sensor 33 are electrically connected with a data processing unit, the data processing unit processes detection data and outputs the detection data to the display screen 35, the data processing unit comprises a single chip microcomputer and a memory, the memory is used for recording data collected by the displacement sensor 32 and the tension sensor 33 and data processed by the single chip microcomputer, and the data processing unit is integrally installed with the display screen 35.
In the above embodiment, referring to fig. 4, the adjustable support rod assembly 11 includes a universal adjusting foot seat 111, a lower support rod 112, an adjusting screw 113, and an upper support rod 114, the universal adjusting foot seat 111 is connected to the lower support rod 112 through a ball hinge, the upper support rod 114 is fixedly connected to the support plate 12, and the adjusting screw 113 is connected between the lower support rod 112 and the upper support rod 114 through a screw thread.
The adjusting screw 113 is fixedly connected with the upper support rod 114 or the lower support rod 112, so as to achieve the purpose of quickly adjusting the length of the upper support rod 114 and the lower support rod 112.
In some embodiments, the data processing unit is further electrically connected to a timer, and the timer is used for recording the valve opening time or the valve closing time.
In other embodiments, for fast and precise adjustment of the level of the support plate 12, the present embodiment is provided with levels 13 in at least two different directions of said support plate 12.
As another preferred embodiment of the present invention, the present embodiment provides a method for testing a main shaft center aeration valve of a hydro-generator set, wherein the method for testing a main shaft center aeration valve of a hydro-generator set using any one of the above-mentioned methods includes a valve opening test, and the valve opening test includes the following steps:
s1, mounting the testing device on the top of an air compensating valve a, and adjusting a supporting assembly 10 to enable a supporting disc 12 to be in a horizontal state;
s2, the gulp valve guide cylinder b is detachably and rigidly connected with the transition disc 24;
s3, zeroing the data of the displacement sensor 32 and the tension sensor 33;
s4, operating the rotating hand wheel 22 to drive the pull rod 21 to move upwards to simulate the valve opening action of the air supply valve;
s5, the tension sensor 33 and the displacement sensor 32 measure the tension value of the pull rod 21 and the displacement stroke of the transition disc 24 in real time and output the tension value and the displacement stroke to the data processing unit, the displacement stroke corresponds to the real-time opening degree of the gulp valve a, the data processing unit converts the tension value of the pull rod 21 into the vacuum degree in the gulp valve a, and a relationship curve between the opening degree of the gulp valve and the vacuum degree is formed by combining the opening degree data of the gulp valve collected by the displacement sensor 32.
During calculation, according to a calculation formula F = PS, a tension value F is converted into a pressure value P by combining with an area S of a valve disc of the air compensating valve, the pressure value is further processed by combining with a standard atmospheric pressure value, the pressure value is converted into the vacuum degree in the air compensating valve for displaying, the axial displacement stroke of the air compensating valve is converted into the opening degree of the air compensating valve by combining with the maximum action displacement stroke of the air compensating valve for displaying, and a relation curve between the opening degree and the vacuum degree of the air compensating valve can be formed after data processing.
In some preferred embodiments, it is preferable that the method further comprises a valve closing test, and the valve closing test comprises the following steps:
s1, an upward external force is given to a pull rod, after an air compensating valve reaches the maximum opening degree, the external force is removed to simulate the automatic valve closing action of the air compensating valve, and a timer records the valve closing time of the air compensating valve from full opening to full closing;
and S2, the displacement sensor measures the displacement stroke of the transition disc in real time and outputs the displacement stroke to the data processing unit, the displacement stroke corresponds to the real-time opening of the gulp valve, and a relation curve of the closing opening of the gulp valve and the closing time is formed by combining the closing time recorded by the timer.
As another embodiment of the present invention, after obtaining a relationship curve between the opening degree and the vacuum degree of the aeration valve and a relationship curve between the closing degree and the closing time of the aeration valve, comparing the relationship curve between the opening degree and the vacuum degree of the aeration valve and the relationship curve between the closing degree and the closing time of the aeration valve with a performance curve calibrated by a factory respectively, it can be determined whether the performance of the aeration valve in the current state meets the aeration performance requirement of the center of the main shaft of the water-turbine generator set, and further, it can be determined whether the aeration valve needs to be replaced.
In addition, after the gulp valve is overhauled, the assembling quality of the overhauled gulp valve can be effectively detected by using the device and the method provided by the invention.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The utility model provides a hydroelectric set main shaft center aeration valve test device which characterized in that: the device comprises a supporting component, a simulated action component and a data measuring component;
the supporting assembly comprises a plurality of groups of adjustable supporting rod assemblies and a supporting plate connected to the tops of the groups of adjustable supporting rod assemblies;
the simulated action assembly comprises a pull rod penetrating through the supporting plate, the pull rod is in threaded connection with a rotating hand wheel, the bottom end of the pull rod is connected with a detachable transition disc, and the transition disc is used for being connected with an air compensating valve guide cylinder;
the data measurement assembly comprises a displacement sensor support, a displacement sensor and a tension sensor, the displacement sensor support is connected to the lower portion of the supporting disc, the displacement sensor is connected between the displacement sensor support and the transition disc, the tension sensor is connected between the transition disc and the pull rod, a distribution box and a display screen are further installed on the supporting disc, the distribution box supplies power to the displacement sensor, the tension sensor and the display screen, the displacement sensor and the tension sensor are electrically connected with the data processing unit, and the data processing unit outputs the detection data to the display screen after processing.
2. The hydroelectric set main shaft center aeration valve test device according to claim 1, characterized in that: the adjustable supporting rod assembly comprises a universal adjusting foot seat, a lower supporting rod, an adjusting screw rod and an upper supporting rod, the universal adjusting foot seat is connected with the lower supporting rod, the upper supporting rod is fixedly connected with the supporting disk, and the supporting rod is connected with the upper supporting rod through threads.
3. The hydroelectric generating set main shaft center aeration valve test device according to claim 1, characterized in that: and a level ruler is arranged on the supporting disk.
4. The hydroelectric generating set main shaft center aeration valve test device according to claim 2, characterized in that: the data processing unit is also electrically connected with a timer.
5. The method for testing the main shaft center aeration valve of the hydroelectric generating set by using the main shaft center aeration valve testing device of the hydroelectric generating set according to any one of claims 1 to 4 comprises a valve opening test, and is characterized in that the valve opening test comprises the following steps:
s1, mounting a test device on the top of an aeration valve, and adjusting a support assembly to enable a support plate to be in a horizontal state;
s2, the gulp valve guide cylinder is in detachable rigid connection with the transition disc;
s3, zeroing the data of the displacement sensor and the tension sensor;
s4, operating the rotating hand wheel to drive the pull rod to move upwards to simulate the valve opening action of the air supply valve;
and S5, the tension sensor and the displacement sensor measure the tension value of the pull rod and the displacement stroke of the transition disc in real time and output the tension value and the displacement stroke to the data processing unit, the displacement stroke corresponds to the real-time opening degree of the gulp valve, the data processing unit converts the tension value of the pull rod into the vacuum degree in the gulp valve and combines the gulp valve opening degree data acquired by the displacement sensor to form a relation curve between the opening degree of the gulp valve and the vacuum degree.
6. The method for testing the main shaft center aeration valve of the hydroelectric generating set according to claim 5, further comprising a valve closing test, wherein the valve closing test comprises the following steps:
s1, an upward external force is given to a pull rod, after an air compensating valve reaches the maximum opening degree, the external force is removed to simulate the automatic valve closing action of the air compensating valve, and a timer records the valve closing time of the air compensating valve from full opening to full closing;
and S2, the displacement sensor measures the displacement stroke of the transition disc in real time and outputs the displacement stroke to the data processing unit, the displacement stroke corresponds to the real-time opening of the gulp valve, and a relation curve of the closing opening of the gulp valve and the closing time is formed by combining the closing time recorded by the timer.
7. The hydroelectric generating set main shaft center aeration valve test device method according to claim 6, characterized in that: and respectively comparing a relation curve of the opening degree and the vacuum degree of the air compensating valve and a relation curve of the closing opening degree and the closing time of the air compensating valve with a performance curve calibrated by a factory, judging whether the performance of the air compensating valve in the current state meets the air compensating performance requirement of the center of the main shaft of the hydroelectric generating set, and further judging whether the air compensating valve needs to be replaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310043947.XA CN115979619A (en) | 2023-01-29 | 2023-01-29 | Hydroelectric generating set main shaft center aeration valve test device and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310043947.XA CN115979619A (en) | 2023-01-29 | 2023-01-29 | Hydroelectric generating set main shaft center aeration valve test device and test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115979619A true CN115979619A (en) | 2023-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310043947.XA Pending CN115979619A (en) | 2023-01-29 | 2023-01-29 | Hydroelectric generating set main shaft center aeration valve test device and test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115979619A (en) |
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2023
- 2023-01-29 CN CN202310043947.XA patent/CN115979619A/en active Pending
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