A load regulating transformer

Abstract

The utility model relates to a load regulating transformer, and aims to provide a load regulating transformer. The utility model adopts the technical scheme that comprises a transformer core, a transformer air sleeve, an upper clamping assembly, a lower clamping assembly, upper and lower pad block assemblies arranged on the upper and lower end faces of the transformer air sleeve respectively, a main through hole of an envelope is arranged in the center of the transformer air sleeve, the transformer air sleeve is provided with a heat dissipation opening and an air sleeve connecting hole at intervals along the circular arc of the main through hole of the envelope, and the lower pad block assembly comprises a lower pad block, a shock absorbing spring, a top cover, a connecting rod and a fixing nut. The utility model has the advantages that the hard friction and impact between the transformer air sleeve and the upper and lower clamping assemblies can be reduced under the condition of continuous vibration environment through the action of the shock absorbing spring, vibration noise and abrasion are effectively reduced, the shock absorbing block further enhances the buffering and shock absorbing effect, and the service life of the rigid component is prolonged.

Description

Technical Field

[0001] This utility model relates to an on-load tap-changing transformer. Background Technology

[0002] On-load tap-changing transformers are power devices capable of graded voltage regulation during operation. They are widely used in power systems to ensure grid voltage stability and equipment safety. Their basic structure typically includes a transformer core, windings, voltage regulating devices, and auxiliary fixing and heat dissipation structures. During operation, on-load tap-changing transformers need to be energized and stressed for extended periods; their mechanical strength and vibration control capabilities directly affect operational reliability and service life. Existing on-load tap-changing transformers generally suffer from the following problems: 1. High noise levels: Due to the magnetostrictive effect of the transformer core under alternating magnetic fields, the core and its clamping components vibrate, generating significant noise in the casing and fixed structures, affecting the operating environment of the power equipment. 2. Severe vibration wear: During long-term operation, the core and sheath have rigid contact with the upper and lower clamping components. Continuous mechanical vibration leads to wear between components, reducing structural stability and reliability. 3. Insufficient vibration damping: Although traditional transformer structures may employ some buffering measures, most rely on rigid connections, lacking effective elastic damping and flexible vibration isolation designs. This makes them vulnerable to the impact of frequent vibrations, easily leading to fatigue damage to metal components. Utility Model Content

[0003] To solve the above problems, the technical problem to be solved by this utility model is to provide an on-load tap-changing transformer.

[0004] The technical solution adopted by this utility model of an on-load tap-changing transformer is characterized by comprising a transformer core, a transformer sleeve fitted outside the transformer core, an upper clamping assembly clamping the upper end of the transformer core, a lower clamping assembly clamping the lower end of the transformer core, and upper and lower pads respectively disposed on the upper and lower end faces of the transformer sleeve. The transformer sleeve has a main through hole at its center for the transformer core to pass through. The transformer sleeve has heat dissipation vents and sleeve connection holes spaced around the main through hole in an arc. The lower pad assembly includes a lower pad, a damping spring, a top cover, a connecting rod, and a fixing nut. The lower pad includes a lower pad... The block body has an inner recessed groove at its upper end and a through hole in the inner recessed groove. The block body also has an inner rim outside the inner recessed groove. The top cover has a top cover positioning groove at its bottom and a through hole in the center of the top cover positioning groove. The damping spring is placed in the inner recessed groove of the lower block, with its upper end abutting against the top cover positioning groove. The connecting rod passes through the lower clamping assembly, the through hole of the lower block, the through hole of the top cover, the air sleeve connecting hole, the upper block, and the upper clamping assembly from bottom to top, and is then tightened and fixed by the fixing nut.

[0005] The lower pad assembly also includes a shock-absorbing block, which is placed between the lower clamping assembly and the lower pad. The shock-absorbing block includes a shock-absorbing block partition and a shock-absorbing block positioning protrusion. The center of the shock-absorbing block positioning protrusion is provided with a shock-absorbing block through hole for the connecting rod to pass through. The bottom of the lower pad is provided with a lower pad limiting groove corresponding to the shock-absorbing block positioning protrusion.

[0006] The shock absorber is made of rubber.

[0007] The upper end face of the top cover is provided with a top cover positioning rim outside the top cover through hole, and the lower end face of the transformer fan sleeve is provided with a fan sleeve positioning groove corresponding to the top cover positioning rim at the fan sleeve connection hole.

[0008] The depth of the wind cover positioning groove is greater than the height of the top cover positioning edge.

[0009] The inner diameter of the top cover positioning groove is larger than the outer diameter of the inner edge of the lower pad block.

[0010] The advantages of this on-load tap-changing transformer are as follows: the damping spring reduces the hard friction and impact between the transformer sheath and the upper and lower clamping components under continuous vibration, effectively reducing vibration noise and wear; the damping block further enhances the buffering and damping effect, extending the service life of rigid components. Attached Figure Description

[0011] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0012] Figure 1 This is a schematic diagram of the structure of the on-load tap-changing transformer of this utility model; Figure 2 This is an exploded view of the lower pad block assembly of this utility model; Figure 3 This is a schematic diagram of the structure of the transformer fan sleeve of this utility model; Figure 4 This is a front structural diagram of the lower pad block of this utility model; Figure 5 This is a schematic diagram of the back structure of the top cover of this utility model; Figure 6 This is a front structural diagram of the top cover of this utility model; Figure 7 This is a structural schematic diagram of the shock absorber block of this utility model; Figure 8 This is a schematic diagram of the back structure of the lower pad block of this utility model. Detailed Implementation

[0013] like Figure 1-8 As shown, the on-load tap-changing transformer of this utility model includes a transformer core 1, a transformer sleeve 2 sleeved on the transformer core 1, an upper clamping assembly 3 clamping the upper end of the transformer core 1, a lower clamping assembly 4 clamping the lower end of the transformer core 1, and upper pads 6 and lower pads 5 respectively disposed on the upper and lower end faces of the transformer sleeve 2. The transformer sleeve 2 has a main through hole 15 for the transformer core 1 to pass through at its center. The transformer sleeve 2 has heat dissipation vents 16 and sleeve connection holes 17 spaced around the main through hole 15 in an arc. The lower pad assembly 5 includes a lower pad 8, a damping spring 9, a top cover 11, a connecting rod 10, and a fixing nut 12. The lower pad 8 includes a lower pad body 20, and the upper end of the lower pad body 20 has a lower pad inner groove 21. The lower pad inner groove 21 has a lower pad through hole 2. 2. The lower pad body 20 has an inner circumference 23 outside the inner groove 21 of the lower pad. The top cover 11 has a top cover positioning groove 25 at the bottom and a top cover through hole 26 at the center of the top cover positioning groove 25. The damping spring 9 is placed in the inner groove 21 of the lower pad and its upper end abuts against the top cover positioning groove 25. The connecting rod 10 passes through the lower clamping assembly 4, the lower pad through hole 22, the top cover through hole 26, the wind sleeve connecting hole 17, the upper pad 6, and the upper clamping assembly 3 from bottom to top and is then tightened by the fixing nut 12, so that the damping spring 9 and the lower pad 8 and other components can maintain a stable working state for a long time. Through the action of the damping spring 9, the transformer wind sleeve 2 can reduce the hard friction and impact between itself and the upper clamping assembly 3 and the lower clamping assembly 4 under continuous vibration environment, effectively reducing vibration noise and wear.

[0014] The lower pad assembly 5 also includes a shock-absorbing block 13, which is placed between the lower clamping assembly 4 and the lower pad 8. The shock-absorbing block 13 includes a shock-absorbing block partition 29 and a shock-absorbing block positioning protrusion 30. The center of the shock-absorbing block positioning protrusion 30 is provided with a shock-absorbing block through hole 31 for the connecting rod 10 to pass through. The bottom of the lower pad 8 is provided with a lower pad limiting groove 33 corresponding to the shock-absorbing block positioning protrusion 30, which further reduces noise and wear caused by frequent vibration.

[0015] The shock absorber 13 is made of rubber, which is flexible and can effectively reduce the impact and noise caused by frequent vibrations, and extend the life of rigid components such as the lower pad 8.

[0016] The upper end face of the top cover 11 is provided with a top cover positioning edge 27 outside the top cover through hole 26, and the lower end face of the transformer fan sleeve 2 is provided with a fan sleeve positioning groove 34 corresponding to the top cover positioning edge 27 at the fan sleeve connection hole 17.

[0017] The depth of the wind cover positioning groove 34 is greater than the height of the top cover positioning edge 27, so as to prevent the top cover 11 from becoming loose or shifting during operation.

[0018] The inner diameter of the top cover positioning groove 25 is larger than the outer diameter of the inner edge 23 of the lower pad, making the transformer fan sleeve 2 more stable and reliable when pressed down.

[0019] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model are included within the protection scope of the present utility model.

Claims

1. An on-load tap-changing transformer, characterized in that: The system includes a transformer core (1), a transformer sleeve (2) fitted outside the transformer core (1), an upper clamping assembly (3) clamping the upper end of the transformer core (1), a lower clamping assembly (4) clamping the lower end of the transformer core (1), an upper pad (6) and a lower pad assembly (5) respectively disposed on the upper and lower end faces of the transformer sleeve (2). The transformer sleeve (2) has a main through hole (15) for the transformer core (1) to pass through at its center. The transformer sleeve (2) has a heat dissipation port (16) and a sleeve connection hole (17) spaced around the main through hole (15) in an arc. The lower pad assembly (5) includes a lower pad (8), a damping spring (9), a top cover (11), a connecting rod (10), and a fixing nut (12). The lower pad (8) includes a lower pad body (20). The lower pad body (20) has an inner groove (21) at the upper end, and a through hole (22) is provided in the inner groove (21). The lower pad body (20) has an inner rim (23) outside the inner groove (21). The top cover (11) has a top cover positioning groove (25) at the bottom, and a through hole (26) is provided in the center of the top cover positioning groove (25). The damping spring (9) is placed in the inner groove (21) of the lower pad and its upper end abuts against the top cover positioning groove (25). The connecting rod (10) passes through the lower clamping assembly (4), the lower pad through hole (22), the top cover through hole (26), the wind sleeve connecting hole (17), the upper pad (6), and the upper clamping assembly (3) from bottom to top and is then tightened by the fixing nut (12).

2. The on-load tap-changing transformer according to claim 1, characterized in that: The lower pad assembly (5) also includes a shock absorber (13), which is placed between the lower clamping assembly (4) and the lower pad (8). The shock absorber (13) includes a shock absorber partition (29) and a shock absorber positioning protrusion (30). The shock absorber positioning protrusion (30) has a shock absorber through hole (31) at its center for the connecting rod (10) to pass through. The bottom of the lower pad (8) has a lower pad limiting groove (33) corresponding to the shock absorber positioning protrusion (30).

3. The on-load tap-changing transformer according to claim 2, characterized in that: The shock absorber block (13) is made of rubber.

4. The on-load tap-changing transformer according to claim 1, characterized in that: The upper end face of the top cover (11) is provided with a top cover positioning rim (27) outside the top cover through hole (26), and the lower end face of the transformer fan sleeve (2) is provided with a fan sleeve positioning groove (34) corresponding to the top cover positioning rim (27) at the fan sleeve connection hole (17).

5. The on-load tap-changing transformer according to claim 4, characterized in that: The depth of the wind cover positioning groove (34) is greater than the height of the top cover positioning edge (27).

6. The on-load tap-changing transformer according to claim 1, characterized in that: The inner diameter of the top cover positioning groove (25) is larger than the outer diameter of the inner edge (23) of the lower pad block.

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