A shock-absorbing and noise-reducing elastically supported dry-type transformer core

Abstract

This utility model relates to the field of vibration reduction technology for power equipment, specifically a vibration-damping and noise-reducing elastically supported dry-type transformer core, comprising: a transformer, including a core, windings, and a support; a vibration damping assembly, including an elastic rod and a vibration damper; and a mass adjustment assembly, including a liquid storage tank connected to the vibration damper via a connecting pipe, with a pressure adjustment mechanism located behind the liquid storage tank. This utility model, by setting up a vibration damping assembly, utilizes the vibration damper and elastic rod to form a resonant system, converting the mechanical energy of the core vibration into heat energy for dissipation, thus achieving vibration reduction and noise reduction; by setting up a mass adjustment assembly, the mass of the vibration damper can be dynamically adjusted through the hydraulic oil mass distribution, thereby adjusting the vibration frequency of the vibration damper to achieve frequency tracking and adapt to the vibration deviation of the core.

Description

Technical Field

[0001] This utility model relates to the field of vibration reduction technology for power equipment, specifically a vibration-damping and noise-reducing elastic support dry-type transformer core. Background Technology

[0002] A transformer is a device that uses the principle of electromagnetic induction to change the voltage of alternating current. Its main components are the primary coil, secondary coil, and iron core. Transformers whose iron core and windings are not immersed in cooling oil but are cooled by air are called dry-type transformers. Dry-type transformers have strong short-circuit withstand capability, require less maintenance, have high operating efficiency, and high reliability, and are often used in high-rise buildings, airports, docks, and other similar locations.

[0003] During the operation of a dry-type transformer, the iron core will generate periodic vibrations due to the magnetostrictive effect and electromagnetic force. These vibrations are transmitted to the outer casing or external transformer box through the transformer frame, resulting in amplified vibration noise, which affects the life of the equipment and the surrounding environment.

[0004] Traditional vibration reduction methods are mainly divided into two types: rigid fixing and passive vibration dampers, such as rubber pads and spring isolation devices. Rigid fixing has a vibration transmission amplification effect, which causes the vibration of the iron core to be transmitted to the outer shell without attenuation, forming a sound bridge and amplifying the noise. Passive vibration damping can only target a single frequency. When the transformer load changes and causes the iron core vibration frequency to shift, the efficiency of the vibration damper will decrease. Utility Model Content

[0005] To compensate for the excessive noise caused by the transmission and amplification effect of traditional vibration damping, and the inability of passive vibration damping to adapt to vibration frequency shifts, this utility model provides a vibration-damping and noise-reducing elastic support for dry-type transformer cores.

[0006] The technical solution of this utility model is:

[0007] A shock-absorbing and noise-reducing elastically supported dry-type transformer core, comprising:

[0008] A transformer, comprising an iron core, windings, and a support frame;

[0009] Vibration damping components are symmetrically arranged on both sides of the iron core and include elastic rods. One end of the elastic rod is fixedly installed on the outer side of the top of the support by a fixing frame, and the other end is connected to an anti-vibration hammer.

[0010] The mass adjustment component includes a reservoir containing hydraulic oil. The reservoir is connected to a vibration damper via a connecting pipe. A pressure adjustment mechanism is located behind the reservoir, which is used to change the pressure inside the reservoir to adjust the mass distribution of the hydraulic oil.

[0011] Preferably, vibration detection components are symmetrically arranged below the head of the support, and the vibration detection components are used to detect the vibration of the iron core in real time.

[0012] Preferably, the vibration damper includes a vibration damping cylinder with end caps at both ends. The end of the elastic rod is axially fixed to the outside of the vibration damping cylinder, and the front end cap is connected to a connecting pipe.

[0013] Preferably, the vibration-damping cylinder is provided with an elastic element and a first piston, with the two ends of the elastic element abutting against the end cap and the first piston respectively, to suppress the impact of liquid flow.

[0014] Preferably, the liquid storage tank includes a liquid storage bucket, and the liquid storage bucket is provided with second end caps at both ends, with the front second end cap communicating with a connecting pipe.

[0015] Preferably, the pressure regulating mechanism includes a telescopic rod located behind the liquid storage tank. The movable part of the telescopic rod is axially inserted into the liquid storage tank from the rear second end cap and connected to a second piston. The telescopic rod is used to drive the second piston to move axially.

[0016] Preferably, the end of the connecting pipe is provided with a three-way valve, the first port of the three-way valve is connected to the connecting pipe, the second port is open to the atmosphere for venting and replenishing liquid, and the third port is connected to the front end cap of the anti-vibration cylinder.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention, by setting up a vibration damping component, utilizes a vibration damping hammer and an elastic rod to form a resonant system, converting the mechanical energy of the iron core vibration into heat energy for dissipation, thereby achieving vibration reduction and noise reduction; by setting up a mass adjustment component, the mass of the vibration damping hammer can be dynamically adjusted through the hydraulic oil mass distribution, thereby adjusting the vibration frequency of the vibration damping hammer and achieving frequency tracking to adapt to the vibration deviation of the iron core. Attached Figure Description

[0019] Figure 1 This is a front view of the overall structure of this utility model;

[0020] Figure 2 This is a second schematic diagram of the overall structure of this utility model;

[0021] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the vibration-damping cylindrical structure in this utility model;

[0023] Figure 5 This is a schematic cross-sectional view of the liquid storage tank in this utility model.

[0024] The meanings of the labels in the diagram are as follows:

[0025] 1. Transformer; 11. Iron core; 12. Winding; 13. Spacer; 14. Bracket; 15. Vibration detection assembly;

[0026] 2. Vibration damping assembly; 21. Fixing frame; 22. Elastic rod; 23. Vibration damping cylinder; 24. End cap; 25. Elastic element; 26. First piston;

[0027] 3. Mass adjustment assembly; 31. Liquid storage tank; 32. Second end cap; 33. Telescopic rod; 34. Second piston; 35. Connecting pipe; 36. Three-way valve. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1:

[0030] Please see Figure 1-5 The present invention will describe the above technical solution in detail through the following embodiments:

[0031] A shock-absorbing and noise-reducing elastically supported dry-type transformer core, comprising:

[0032] Transformer 1 includes an iron core 11, windings 12 and support 14.

[0033] The iron core 11 is made of stacked silicon steel sheets. The winding 12 wraps around the middle of the iron core 11 and is covered with a resin insulation layer. The bracket 14 is used to support and fix the iron core 11 and the winding 12. The two ends of the winding 12 and the bracket 14 are fixedly installed with pads 13 by bolts.

[0034] Vibration detection components 15 are symmetrically arranged below the head of the bracket 14. The vibration detection components 15 are used to detect the vibration of the iron core 11 in real time.

[0035] The vibration detection component 15 can be an accelerometer, which can detect the vibration frequency and direction of the transformer 1.

[0036] Vibration damping component 2 is symmetrically arranged on both sides of iron core 11. It includes elastic rod 22. One end of elastic rod 22 is fixedly installed on the outer side of the top of bracket 14 through fixing frame 21, and the other end is connected to anti-vibration hammer.

[0037] The fixing frame 21 is fixedly installed on the outer side of the top of the bracket 14 by bolts. The elastic rod 22 can be made of metal rod, steel strand or carbon fiber reinforced resin material. In this embodiment, the head of the steel strand is clamped by the fixing frame 21.

[0038] The fixed frame 21, the elastic rod 22 and the vibration damper constitute a resonant system. When the transformer 1 vibrates, the inertial vibration damper maintains its motion state and generates a phase difference with the vibration of the transformer 1, converting the mechanical energy of the vibration into the internal energy of the elastic rod 22 and then into heat dissipation, thereby achieving vibration reduction.

[0039] The mass adjustment component 3 includes a reservoir containing hydraulic oil. The reservoir is connected to the anti-vibration hammer via a connecting pipe 35. A pressure adjustment mechanism is located behind the reservoir. The pressure adjustment mechanism is used to change the pressure inside the reservoir to adjust the mass distribution of the hydraulic oil.

[0040] By adjusting the mass distribution of the hydraulic oil, the mass of the vibration damper can be changed, thereby altering its natural vibration frequency to accommodate the vibration deviation of transformer 1. The adjustment is based on the vibration frequency of transformer 1 detected by the vibration detection component 15.

[0041] The vibration damper includes a vibration damping cylinder 23, with end caps 24 at both ends of the vibration damping cylinder 23. The end of the elastic rod 22 is axially fixed to the outside of the vibration damping cylinder 23, and the front end cap 24 is connected to the connecting pipe 35.

[0042] The vibration damping cylinder 23 is made of metal. The end cap 24 is fixedly installed on the end face of the vibration damping cylinder 23 by screws. Hydraulic oil is injected into the vibration damping cylinder 23 from the end cap 24 on the front side through the connecting pipe 35.

[0043] The vibration damping cylinder 23 is equipped with an elastic element 25 and a first piston 26. The two ends of the elastic element 25 abut against the end cap 24 and the first piston 26 respectively, which is used to suppress the impact of liquid flow.

[0044] The first piston 26 is slidably installed inside the anti-vibration cylinder 23, and a sealing element is provided between it and the inner wall of the anti-vibration cylinder 23. The first piston 26 divides the anti-vibration cylinder 23 into two parts, the front side for containing liquid and the rear side for placing the elastic element 25.

[0045] The elastic element 25 can be a gas spring, and the piston rod of the elastic element 25 is fixedly connected to the first piston 26 by screws. The elastic force of the elastic element 25 can provide a certain pressure for the liquid inside the anti-vibration cylinder 23, reduce the impact of liquid flow caused by the vibration of the anti-vibration cylinder 23, and avoid excessive vibration of the anti-vibration cylinder 23.

[0046] Meanwhile, the elastic force of the elastic element 25 can also drive the first piston 26 to move towards the head of the anti-vibration cylinder 23, thereby improving the response speed of mass adjustment.

[0047] The liquid storage tank includes a liquid storage bucket 31, and a second end cap 32 is fixedly installed at both ends of the liquid storage bucket 31 by screws. The front second end cap 32 is connected to the connecting pipe 35.

[0048] The reservoir 31 is made of metal and is horizontally fixed to the bottom of the bracket 14 by screws or clamps in the middle. Hydraulic oil is stored in the reservoir 31.

[0049] The pressure regulating mechanism includes a telescopic rod 33, which is located behind the liquid storage tank 31. The movable rod of the telescopic rod 33 is axially inserted into the liquid storage tank 31 from the rear second end cover 32 and connected to the second piston 34. The telescopic rod 33 is used to drive the second piston 34 to move axially.

[0050] The second piston 34 is slidably installed inside the liquid storage tank 31, and a sealing element is provided between it and the inner wall of the liquid storage tank 31. The second piston 34 divides the liquid storage tank 31 into two parts, front and back, with the front part used to contain hydraulic oil.

[0051] The telescopic rod 33 can be a servo push rod, which uses a servo motor to drive the movable rod to move axially. The second piston 34 is fixedly installed at the end of the movable rod of the telescopic rod 33 by screws.

[0052] When the telescopic rod 33 is working, it can drive the second piston 34 to move axially, thereby changing the pressure of the hydraulic oil in the reservoir 31.

[0053] When the pressure increases, the hydraulic oil flows to the anti-vibration cylinder 23; when the pressure decreases, the hydraulic oil returns to the reservoir 31.

[0054] The end of the connecting pipe 35 is provided with a three-way valve 36. The first port of the three-way valve 36 is connected to the connecting pipe 35, the second port is open to the atmosphere for venting and replenishing liquid, and the third port is connected to the front end cap 24 of the anti-vibration cylinder 23.

[0055] The connecting pipe 35 is made of polytetrafluoroethylene (PTFE) flexible tubing, which has the advantages of acid and alkali resistance, oil resistance, and low coefficient of friction. In addition, the flexible tubing can block vibration.

[0056] It is important to note that the outer side of the hose needs to be reinforced for tensile and compressive strength. For example, a Kevlar braided layer can be used to wrap the outer side of the hose to improve its compressive and tensile strength and protect it.

[0057] The three-way valve 36 uses a T-type valve core. In the working state, the connecting pipe 35 is connected to the anti-vibration cylinder 23.

[0058] During repeated adjustments, hydraulic oil is lost, which can lead to air entering and reduce the system's response efficiency. At this time, connecting the connecting pipe 35 and the anti-vibration cylinder 23 to the atmosphere can discharge residual gas in the pipes, improve safety, and replenish hydraulic oil from the second port of the three-way valve 36.

[0059] Working principle:

[0060] When transformer 1 vibrates, the inertial anti-vibration hammer maintains its motion state and generates a phase difference with the vibration of transformer 1, converting the mechanical energy of the vibration into the internal energy of the elastic rod 22 and then into heat dissipation, thereby achieving vibration reduction.

[0061] When the transformer 1 vibrates and shifts due to load changes, the vibration detection component 15 detects a change in the vibration frequency.

[0062] At this time, the telescopic rod 33 is activated, driving the second piston 34 to move, changing the pressure of the hydraulic oil in the reservoir 31, causing the hydraulic oil to flow, changing the mass of the hydraulic oil in the anti-vibration cylinder 23, thereby changing the mass of the anti-vibration hammer, and further changing the natural vibration frequency of the anti-vibration hammer to match the vibration frequency of the transformer 1.

[0063] During maintenance, the telescopic rod 33 is operated to drive the second piston 34 to move towards the end of the reservoir 31, so that all hydraulic oil is discharged from the anti-vibration cylinder 23 and returns to the reservoir 31 and the connecting pipe 35.

[0064] Control the rotation of the valve core of the three-way valve 36 to connect the connecting pipe 35 and the vibration-damping cylinder 23 to the atmosphere.

[0065] New hydraulic oil is injected into the connecting pipe 35 through the second port of the three-way valve 36. Since air is less dense than hydraulic oil, the air will be forced out of the second port of the three-way valve 36 by the hydraulic oil. After the fluid replenishment is complete, the three-way valve 36 is reset.

[0066] The reciprocating motion of the telescopic rod 33 is controlled to cause the hydraulic oil in the connecting pipe 35 to flow repeatedly, flushing down the air bubbles attached to the inner wall, and repeating the fluid replenishment process until no more fluid can be injected.

[0067] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A shock-absorbing and noise-reducing elastically supported dry-type transformer core, characterized in that, include: A transformer (1), the transformer (1) comprising an iron core (11), windings (12) and a support (14); Vibration damping assembly (2), the vibration damping assembly (2) is symmetrically arranged on both sides of the iron core (11), including elastic rod (22), one end of the elastic rod (22) is fixedly installed on the outer side of the top of the bracket (14) by a fixing frame (21), and the other end is connected to a vibration damper; The mass adjustment component (3) includes a reservoir containing hydraulic oil. The reservoir is connected to the anti-vibration hammer via a connecting pipe (35). A pressure adjustment mechanism is provided behind the reservoir to change the pressure inside the reservoir, thereby adjusting the mass distribution of the hydraulic oil.

2. The shock-absorbing and noise-reducing elastically supported dry-type transformer core as described in claim 1, characterized in that: The support (14) is symmetrically provided with vibration detection components (15) below the head. The vibration detection components (15) are used to detect the vibration of the iron core (11) in real time.

3. The shock-absorbing and noise-reducing elastically supported dry-type transformer core as described in claim 1, characterized in that: The vibration damper includes a vibration damping cylinder (23), with end caps (24) at both ends of the vibration damping cylinder (23). The end of the elastic rod (22) is axially fixed to the outside of the vibration damping cylinder (23), and the end cap (24) on the front side is connected to the connecting pipe (35).

4. The shock-absorbing and noise-reducing elastically supported dry-type transformer core as described in claim 3, characterized in that: The vibration-damping cylinder (23) is provided with an elastic element (25) and a first piston (26). The two ends of the elastic element (25) abut against the end cap (24) and the first piston (26) respectively, in order to suppress the impact of liquid flow.

5. The shock-absorbing and noise-reducing elastically supported dry-type transformer core as described in claim 1, characterized in that: The liquid storage tank includes a liquid storage bucket (31), and the liquid storage bucket (31) has a second end cap (32) at both ends. The second end cap (32) on the front side is connected to a connecting pipe (35).

6. The shock-absorbing and noise-reducing elastically supported dry-type transformer core as described in claim 5, characterized in that: The pressure regulating mechanism includes a telescopic rod (33), which is located behind the liquid storage tank (31). The movable rod of the telescopic rod (33) is axially inserted into the liquid storage tank (31) from the rear second end cap (32) and connected to a second piston (34). The telescopic rod (33) is used to drive the second piston (34) to move axially.

7. The shock-absorbing and noise-reducing elastically supported dry-type transformer core as described in claim 3, characterized in that: The end of the connecting pipe (35) is provided with a three-way valve (36). The first port of the three-way valve (36) is connected to the connecting pipe (35), the second port is open to the atmosphere for venting and replenishing liquid, and the third port is connected to the front end cap (24) of the anti-vibration cylinder (23).

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