CN114112279A - Pumped storage power station transformer impact test bed and test method - Google Patents
Pumped storage power station transformer impact test bed and test method Download PDFInfo
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- CN114112279A CN114112279A CN202111431365.6A CN202111431365A CN114112279A CN 114112279 A CN114112279 A CN 114112279A CN 202111431365 A CN202111431365 A CN 202111431365A CN 114112279 A CN114112279 A CN 114112279A
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- 238000009863 impact test Methods 0.000 title claims abstract description 36
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Abstract
The invention belongs to the technical field of transformer impact tests, and particularly relates to a pumped storage power station transformer impact test bed and a test method. Aiming at the defect that the existing mechanical aspect aiming at transformer impact is less researched, the invention adopts the following technical scheme: a pumped storage power station transformer impact test stand, comprising: the supporting mechanism comprises a compression spring, an impact barrel arranged at the other end of the compression spring and an impact column connected with the impact barrel; the power mechanism is provided with a connecting piece which is detachably connected with the impact cylinder; a testing mechanism; during the test, the power mechanism drives the impact barrel to move axially along the compression spring through the connecting piece and compress the compression spring, when the compression spring is compressed to a preset degree, the connecting piece is separated from the impact barrel, and the impact column on the impact barrel impacts the transformer under the action of the compression spring. The invention has the beneficial effects that: the impact on the transformer is realized through the resetting of the compression spring, the smooth proceeding of the test is ensured, and the blank of the existing research device is made up.
Description
Technical Field
The invention belongs to the technical field of transformer impact tests, and particularly relates to a pumped storage power station transformer impact test bed and a test method.
Background
The pumped storage power station pumps water to an upstream reservoir by using electric energy at a power load valley, and discharges water to a reservoir downstream for power generation at a power load peak. The pumped storage power station is suitable for frequency modulation and phase modulation, and stabilizes the cycle and voltage of a power system. The pumped storage transformer converts electric energy generated by the water turbine into high voltage by utilizing the electromagnetic induction principle and transmits the high voltage to an electric power system, can greatly reduce electric power transmission at a long distance, and is important equipment of a pumped storage power station.
The mechanical strength of the transformer has a great influence on the performance of the transformer, and once the mechanical strength of the transformer fails, the operation of a hydropower station is directly influenced, even the frequency modulation of a power grid is influenced, and the safety of the power grid is influenced.
The existing tests aiming at the transformer impact are focused on the electrical aspect, and the mechanical aspect is less researched. However, in recent years, transformer accidents caused by mechanical problems occur frequently, and therefore, research on the transformer accidents is urgently needed.
Disclosure of Invention
The invention provides a pumped storage power station transformer impact test bed aiming at the defects that the existing test aiming at transformer impact focuses on the electrical aspect and few researches on the mechanical aspect. The invention also provides a test method.
In order to achieve the purpose, the invention adopts the following technical scheme: a pumped storage power station transformer impact test stand, the test stand comprising:
the supporting mechanism comprises a base, a fixed seat vertically arranged on the base, a spring sleeve transversely arranged on the fixed seat, a compression spring arranged in the spring sleeve, an impact barrel arranged at the other end of the compression spring, an impact column connected with the impact barrel, and a guide assembly for guiding the impact barrel;
the power mechanism is provided with a connecting piece which is detachably connected with the impact cylinder;
the testing mechanism comprises a transformer mounting seat, a transformer fixing component arranged on the transformer mounting seat and a transformer fixed by the transformer fixing component;
during the test, the power mechanism drives the impact barrel to move axially along the compression spring through the connecting piece and compress the compression spring, when the compression spring is compressed to a preset degree, the connecting piece is separated from the impact barrel, and the impact column on the impact barrel impacts the transformer under the action of the compression spring.
The impact test bed for the transformer of the pumped storage power station comprises a supporting mechanism, a power mechanism and a test mechanism, wherein the supporting system provides auxiliary support, the test mechanism mainly comprises a transformer to be tested and a fixing device, and the power mechanism realizes impact on the transformer through the reset of a compression spring so as to ensure the smooth running of a test; simple structure, functional strong, can realize the structural analysis behind the different impact forces to the transformer, compensatied the blank of current research device.
As an improvement, the power mechanism comprises a fixed platform, a power trolley arranged on the fixed platform and a separable connecting assembly arranged on the power trolley, the separable connecting assembly comprises a moving part, a connecting sleeve is arranged on the impact cylinder, and the moving part is detachably connected with the connecting sleeve.
As an improvement, the separable connecting component comprises a driving component which drives the movable component to reciprocate along the axial direction perpendicular to the compression spring; the connecting sleeve is provided with a positioning groove, and the moving part can be positioned in the positioning groove.
As an improvement, the driving assembly comprises a motor and a gear rack assembly driven by the motor, and a movable piece is fixedly connected to the gear rack.
As an improvement, the driving assembly further comprises a rack guide groove component.
As an improvement, the power trolley comprises a motor and a pair of rollers driven by the motor.
As an improvement, the impact column is detachably connected with the impact barrel.
As an improvement, a unidirectional movement assembly is further arranged between the power trolley and the fixed table, the unidirectional movement assembly comprises teeth arranged on the fixed table and a rotatable stopping piece arranged on the power trolley, and the stopping piece can stop the teeth. When the compression spring is compressed in place, the stop piece automatically stops the teeth, the power trolley cannot move to the initial position, and at the moment, the power trolley can stop outputting power, so that the impact on the power trolley is reduced.
As an improvement, a separation component for enabling the stopping piece to rotate is arranged on the power trolley.
As an improvement, the separation assembly comprises an electric push rod. When the compression spring is compressed to the right position, the electric push rod pushes up the stop piece, so that the power trolley can be reset to the initial position.
As an improvement, the guide assembly comprises a T-shaped piece and a T-shaped table which are arranged on the base, a guide groove matched with the T-shaped piece is formed in the T-shaped table, and the T-shaped table is fixedly connected with the impact cylinder.
As an improvement, the guide assembly further comprises a fixing plate arranged on the T-shaped piece and a central pipe arranged on the fixing plate, and the central pipe is matched with the impact cylinder.
As an improvement, a connecting frame is fixedly connected to the T-shaped table, a side plate is arranged on the base, a movable groove is formed in the side plate, the connecting frame penetrates through the movable groove, a connecting plate is connected to the connecting frame, and the connecting plate is fixedly connected with the connecting sleeve.
As an improvement, the transformer fixing component comprises a transformer back plate vertically arranged on the transformer mounting seat and a U-shaped part fixedly connected with the transformer back plate, wherein a long groove is formed in the U-shaped part, and a movable plate is arranged in the long groove.
As an improvement, a threaded hole along the axial direction of the compression spring is formed in the U-shaped part, an adjusting screw is arranged in the threaded hole, and the adjusting screw abuts against the movable plate; the U-shaped part is an assembly and comprises a first plate fixedly connected with the transformer back plate and a second plate fixedly connected with the first plate, a plurality of positioning holes are formed in the first plate, and one end of the second plate is positioned in the positioning holes.
A transformer impact test method, the test method comprising:
step S1, assembling the supporting mechanism, the power mechanism and the testing mechanism, and fixing the transformer;
step S2, the power mechanism drives the impact barrel to move along the axial direction of the compression spring through the connecting piece and compress the compression spring, when the compression spring is compressed to a preset degree, the connecting piece is separated from the impact barrel, and the impact column on the impact barrel impacts the transformer under the action of the compression spring;
step S3, resetting the power mechanism;
step S4, repeating the above actions until the impact of the required times is completed;
and step S5, detecting the related parameters of the transformer.
The impact test bed for the pumped storage power station transformer has the beneficial effects that: the testing device comprises a supporting mechanism, a power mechanism and a testing mechanism, wherein the supporting system provides auxiliary support, the testing mechanism mainly comprises a transformer to be tested and a fixing device, and the power mechanism realizes impact on the transformer through the resetting of a compression spring so as to ensure the smooth running of a test; simple structure, functional strong, can realize the structural analysis behind the different impact forces to the transformer, compensatied the blank of current research device.
The test method is applied to the impact test bed for the transformer of the pumped storage power station, and has all the beneficial effects of the impact test bed for the transformer of the pumped storage power station.
Drawings
Fig. 1 is a schematic structural diagram of a pumped storage power station transformer impact test bed according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a supporting mechanism of a pumped storage power station transformer impact test bed according to a first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a power mechanism of a pumped storage power station transformer impact test bed according to a first embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a testing mechanism of a pumped storage power station transformer impact test bed according to a first embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a detachable connection assembly of a pumped storage power station transformer impact test bed according to a first embodiment of the present invention.
In the figure, 1, a support mechanism; 11. a base; 12. a fixed seat; 13. a spring housing; 14. a compression spring; 15. an impact cylinder; 16. an impact column; 17. a connecting frame; 18. connecting sleeves; 19. a side plate; 101. a T-piece; 102. a T-shaped table; 103. a fixing plate; 104. a central tube;
2. a power mechanism; 21. a fixed table; 22. a power trolley; 23. a movable member; 24. teeth; 25. a stopping member; 26. an electric push rod; 27. gears, 28, racks; 29. a rack guide groove;
3. a testing mechanism; 31. a transformer mounting base; 32. a transformer backplane; 33. a U-shaped piece; 34. a movable plate; 35. and adjusting the screw.
Detailed Description
The technical solutions of the embodiments of the present invention will be explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and are not all embodiments. Other embodiments obtained by persons skilled in the art without any inventive work based on the embodiments in the embodiment belong to the protection scope of the invention.
Referring to fig. 1 to 5, the invention relates to a pumped storage power station transformer impact test bed, which comprises:
the supporting mechanism comprises a base, a fixed seat vertically arranged on the base, a spring sleeve transversely arranged on the fixed seat, a compression spring arranged in the spring sleeve, an impact barrel arranged at the other end of the compression spring, an impact column connected with the impact barrel, and a guide assembly for guiding the impact barrel;
the power mechanism is provided with a connecting piece which is detachably connected with the impact cylinder;
the testing mechanism comprises a transformer mounting seat, a transformer fixing component arranged on the transformer mounting seat and a transformer fixed by the transformer fixing component;
during the test, the power mechanism drives the impact barrel to move axially along the compression spring through the connecting piece and compress the compression spring, when the compression spring is compressed to a preset degree, the connecting piece is separated from the impact barrel, and the impact column on the impact barrel impacts the transformer under the action of the compression spring.
The impact test bed for the transformer of the pumped storage power station comprises a supporting mechanism, a power mechanism and a test mechanism, wherein the supporting system provides auxiliary support, the test mechanism mainly comprises a transformer to be tested and a fixing device, and the power mechanism realizes impact on the transformer through the reset of a compression spring so as to ensure the smooth running of a test; simple structure, functional strong, can realize the structural analysis behind the different impact forces to the transformer, compensatied the blank of current research device.
Example one
Referring to fig. 1 to 5, a pumped storage power station transformer impact test bed according to a first embodiment of the present invention includes:
the supporting mechanism 1 comprises a base 11, a fixed seat 12 erected on the base 11, a spring sleeve 13 transversely arranged on the fixed seat 12, a compression spring 14 arranged in the spring sleeve 13, an impact barrel 15 arranged at the other end of the compression spring 14, an impact column 16 connected with the impact barrel 15 and a guide assembly for guiding the impact barrel 15;
the power mechanism 2 is provided with a movable piece 23 which is detachably connected with the impact cylinder 15;
the testing mechanism 3 comprises a transformer mounting seat 31, a transformer fixing component arranged on the transformer mounting seat 31 and a transformer fixed by the transformer fixing component;
during the test, the power mechanism 2 drives the impact cylinder 15 to axially move along the compression spring 14 through the movable part 23 and compress the compression spring 14, when the compression spring 14 is compressed to a preset degree, the movable part 23 is separated from the impact cylinder 15, and the impact column 16 on the impact cylinder 15 impacts the transformer under the action of the compression spring 14.
In this embodiment, the power mechanism 2 includes a fixed platform 21, a power trolley 22 disposed on the fixed platform 21, and a separable connecting assembly disposed on the power trolley 22, where the separable connecting assembly includes a movable member 23, a connecting sleeve 18 is disposed on the impact cylinder 15, and the movable member 23 is detachably connected to the connecting sleeve 18.
In other embodiments, the power cart 22 may be replaced by other structures as long as the axial reciprocating motion along the compression spring 14 is achieved, such as a linear cylinder, a hydraulic cylinder, or the like, or a motor-driven chain and sprocket assembly, or the like.
In this embodiment, the connecting sleeve 18 is provided with a positioning slot, and the movable member 23 can be positioned in the positioning slot.
In this embodiment, the separable connecting element drives the movable element 23 to reciprocate along an axis perpendicular to the compression spring 14.
In this embodiment, the separable connecting assembly includes a motor and 24 assemblies of 24 teeth driven by the motor, and the 24 teeth are fixedly connected to the moving member 23.
In this embodiment, the driving assembly further includes 24 guide slot members, and the 24 guide slot members are arranged to limit the positions of the 24 teeth, so as to ensure that the 24 teeth linearly reciprocate. The 24-rack guide slot arrangement also reduces the impact on the motor of the drive assembly.
In this embodiment, the power cart 22 includes a cart body, a motor disposed on the cart body, and a pair of rollers driven by the motor.
In this embodiment, the impact beam 16 is detachably connected to the impact cylinder 15, so that an appropriate impact beam 16 can be selected.
In this embodiment, a unidirectional moving component is further disposed between the power cart 22 and the fixed platform 21, the unidirectional moving component includes a tooth 24 disposed on the fixed platform 21 and a rotatable stopping member 25 disposed on the power cart 22, and the stopping member 25 can stop the tooth 24. When the compression spring 14 is compressed to the proper position, the stop member 25 automatically stops the teeth 24, and the power cart 22 cannot move to its initial position, at which time the power cart 22 can stop outputting power, thereby reducing the impact on the power cart 22.
In this embodiment, the power cart 22 is provided with a separating component for rotating the stopping member 25.
In this embodiment, the disengagement assembly includes an electric push rod 26. When the compression spring 14 is compressed into position, the electric push rod 26 pushes up the stop 25, so that the power cart 22 can be returned to the initial position. The power pushrod 26 may be disposed obliquely upward.
In this embodiment, the guide assembly includes a T-shaped member 101 and a T-shaped table 102T disposed on the base 11, a guide groove matched with the T-shaped member 101 is formed on the T-shaped table 102T, and the T-shaped table 102T is fixedly connected to the impact cylinder 15.
In this embodiment, the guide assembly further comprises a fixing plate 103 disposed on the T-piece 101 and a center tube 104 disposed on the fixing plate 103, wherein the center tube 104 is engaged with the impact cylinder 15.
In this embodiment, the T-shaped table 102 is fixedly connected with a connecting frame 17, the base 11 is provided with a side plate 19, the side plate 19 is provided with a movable groove, the connecting frame 17 penetrates through the movable groove, the connecting frame 17 is connected with a connecting plate, and the connecting plate is fixedly connected with the connecting sleeve 18. By providing the connecting frame 17, the tooth 24 size and the tooth 24 stroke can be reduced.
In this embodiment, the transformer fixing assembly includes a transformer back plate 32 erected on the transformer mounting seat 31, and a U-shaped member 33 fixedly connected to the transformer back plate 32, wherein a long groove is formed in the U-shaped member 33, and a movable plate 34 is disposed in the long groove.
In this embodiment, the U-shaped member 33 is provided with a threaded hole along the axial direction of the compression spring 14, an adjusting screw 35 is disposed in the threaded hole, and the adjusting screw 35 abuts against the movable plate 34.
In other embodiments, the U-shaped member 33 is a component, and includes a first plate fixedly connected to the transformer back plate 32 and a second plate fixedly connected to the first plate, the first plate has a plurality of positioning holes, and one end of the second plate is positioned in the positioning holes.
In this embodiment, the transformer fixing component can fix transformers with different sizes.
In this embodiment, different impact forces can be achieved by selection of the compression spring 14 and control of the degree of compression of the compression spring 14.
In this embodiment, a travel switch may be provided at the fixing base 21 of the power mechanism 2, and when the power cart 22 is reset to the initial position, the forming switch is triggered to stop the power cart 22.
In this embodiment, the supporting mechanism 1, the power mechanism 2 and the testing mechanism 3 are connected in a non-fixed manner, so that the replacement is convenient.
The impact test bed for the pumped storage power station transformer disclosed by the embodiment of the invention has the beneficial effects that: the test device comprises a support mechanism 1, a power mechanism 2 and a test mechanism 3, wherein the support system provides auxiliary support, the test mechanism 3 mainly comprises a transformer to be tested and a fixing device, and the power mechanism 2 realizes impact on the transformer through the reset of a compression spring 14 so as to ensure the smooth running of a test; simple structure, functional strong, can realize the structural analysis behind the different impact forces to the transformer, compensatied the blank of current research device.
The invention discloses a transformer impact test method, and relates to a pumped storage power station transformer impact test bed in an embodiment of the invention, wherein the test method comprises the following steps:
step S1, assembling the supporting mechanism 1, the power mechanism 2 and the testing mechanism 3, and fixing the transformer;
step S2, the power mechanism 2 drives the impact cylinder 15 to move axially along the compression spring 14 through the movable element 23 and compress the compression spring 14, when the compression spring 14 is compressed to a preset degree, the movable element 23 is separated from the impact cylinder 15, and the impact post 16 on the impact cylinder 15 impacts the transformer under the action of the compression spring 14;
step S3, resetting the power mechanism 2;
step S4, repeating the above actions until the impact of the required times is completed;
and step S5, detecting the related parameters of the transformer.
While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that the invention is not limited thereto but is intended to cover all modifications and equivalents as may be included within the spirit and scope of the invention. Any modification which does not depart from the functional and structural principles of the invention is intended to be included within the scope of the following claims.
Claims (10)
1. The utility model provides a pumped storage power station transformer impact test platform which characterized in that: the test stand includes:
the supporting mechanism (1) comprises a base (11), a fixed seat (12) erected on the base (11), a spring sleeve (13) transversely arranged on the fixed seat (12), a compression spring (14) arranged in the spring sleeve (13), an impact barrel (15) arranged at the other end of the compression spring (14), an impact column (16) connected with the impact barrel (15), and a guide assembly for guiding the impact barrel (15);
a power mechanism (2) which is provided with a movable piece (23) which is detachably connected with the impact cylinder (15);
the testing mechanism (3) comprises a transformer mounting seat (31) and a transformer fixing component arranged on the transformer mounting seat (31);
during the test, the power mechanism (2) drives the impact barrel (15) to axially move along the compression spring (14) through the moving part (23) and compress the compression spring (14), when the compression spring (14) is compressed to a preset degree, the moving part (23) is separated from the impact barrel (15), and the impact column (16) on the impact barrel (15) impacts the transformer under the action of the compression spring (14).
2. The pumped-storage power station transformer impact test stand of claim 1, characterized in that: power unit (2) include fixed station (21), locate power dolly (22) on fixed station (21), locate the detachable coupling assembling on power dolly (22), detachable coupling assembling includes moving part (23), be equipped with adapter sleeve (18) on assaulting a section of thick bamboo (15), moving part (23) with adapter sleeve (18) detachable is connected.
3. The pumped-storage power station transformer impact test stand of claim 2, characterized in that: the separable connecting assembly drives the moving part (23) to axially reciprocate along the direction vertical to the compression spring (14), the separable connecting assembly comprises a motor, a tooth (24) rack assembly driven by the motor and a tooth (24) rack guide groove member guiding the tooth (24), and the moving part (23) is fixedly connected on the tooth (24) rack; the connecting sleeve (18) is provided with a positioning groove, and the movable piece (23) can be positioned in the positioning groove; the power trolley (22) comprises a motor and a pair of rollers driven by the motor; the impact column (16) is detachably connected with the impact cylinder (15).
4. The pumped-storage power station transformer impact test stand of claim 2, characterized in that: the power trolley (22) and the fixed platform (21) are also provided with a unidirectional movement assembly, the unidirectional movement assembly comprises teeth (24) arranged on the fixed platform (21) and a rotatable stopping piece (25) arranged on the power trolley (22), and the stopping piece (25) can stop the teeth (24).
5. The pumped-storage power station transformer impact test stand of claim 4, characterized in that: the power trolley (22) is provided with a separating component which enables the stopping piece (25) to rotate, and the separating component comprises an electric push rod (26).
6. The pumped-storage power station transformer impact test stand of claim 2, characterized in that: the guide assembly comprises a T-shaped part (101) and a T-shaped table (102) which are arranged on the base (11), a guide groove matched with the T-shaped part (101) is formed in the T-shaped table (102), and the T-shaped table (102) is fixedly connected with the impact cylinder (15).
7. The pumped-storage power station transformer impact test stand of claim 6, characterized in that: the guide assembly further comprises a fixing plate (103) arranged on the T-shaped piece (101) and a central pipe (104) arranged on the fixing plate (103), and the central pipe (104) is matched with the impact barrel (15); the T-shaped table (102) is fixedly connected with a connecting frame (17), a side plate (19) is arranged on the base (11), a movable groove is formed in the side plate (19), the connecting frame (17) penetrates through the movable groove, a connecting plate is connected to the connecting frame (17), and the connecting plate is fixedly connected with the connecting sleeve (18).
8. The pumped-storage power station transformer impact test stand of claim 1, characterized in that: the transformer fixing assembly comprises a transformer back plate (32) vertically arranged on the transformer mounting seat (31) and a U-shaped piece (33) fixedly connected with the transformer back plate (32), wherein a long groove is formed in the U-shaped piece (33), and a movable plate (34) is arranged in the long groove.
9. The pumped-storage power station transformer impact test stand of claim 8, wherein: a threaded hole along the axial direction of the compression spring (14) is formed in the U-shaped part (33), an adjusting screw (35) is arranged in the threaded hole, and the adjusting screw (35) abuts against the movable plate (34); the U-shaped part (33) is a component and comprises a first plate fixedly connected with the transformer back plate (32) and a second plate fixedly connected with the first plate, a plurality of positioning holes are formed in the first plate, and one end of the second plate is positioned in the positioning holes.
10. A transformer impact test method applied to the pumped storage power station transformer impact test bed of any one of claims 1 to 9, characterized in that: the test method comprises the following steps:
step S1, assembling the supporting mechanism (1), the power mechanism (2) and the testing mechanism (3), and fixing the transformer;
step S2, the power mechanism (2) drives the impact cylinder (15) to axially move along the compression spring (14) through the moving part (23) and compress the compression spring (14), when the compression spring (14) is compressed to a preset degree, the moving part (23) is separated from the impact cylinder (15), and an impact column (16) on the impact cylinder (15) impacts the transformer under the action of the compression spring (14);
step S3, resetting the power mechanism (2);
step S4, repeating the above actions until the impact of the required times is completed;
and step S5, detecting the related parameters of the transformer.
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| CN117433719A (en) * | 2023-12-20 | 2024-01-23 | 山东美晨工业集团有限公司 | Automobile pipeline tightness detection device |
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