CN111029098B

CN111029098B - Controlled electromagnetic vibration reduction system and vibration reduction method

Info

Publication number: CN111029098B
Application number: CN201911387991.2A
Authority: CN
Inventors: 崔荣华; 宋国华; 刘立军; 袁宏均
Original assignee: Jiangsu Huandong Electric Co ltd
Current assignee: Jiangsu Huandong Electric Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2022-05-31
Anticipated expiration: 2039-12-30
Also published as: CN111029098A

Abstract

The invention discloses a controlled electromagnetic vibration reduction system and a vibration reduction method, which comprise a transformer fixing base, an upper coil, a vibration reduction cavity, a lower coil and a vibration sensor, wherein the upper end part and the lower end part of the upper coil are respectively provided with an upper coil top plate and an upper coil bottom plate, the upper end surface of the upper coil top plate is provided with the transformer fixing base, the upper coil top plate and the transformer fixing base are provided with an upper rubber pad, the vibration reduction cavity is arranged below the upper coil top plate, the lower coil top plate is arranged below the vibration reduction cavity, the lower rubber pad is arranged between the vibration reduction cavity and the lower coil top plate, the lower coil is arranged between the lower coil top plate and the lower coil bottom plate, and the bottom of the lower coil bottom plate is provided with the vibration sensor.

Description

Controlled electromagnetic vibration reduction system and vibration reduction method

Technical Field

The invention relates to the technical field of vibration reduction systems, in particular to a controlled electromagnetic vibration reduction system and a vibration reduction method.

Background

A Transformer (Transformer) is a device that changes an alternating-current voltage by using the principle of electromagnetic induction, and main components are a primary coil, a secondary coil, and an iron core (magnetic core). The main functions are as follows: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer), and the like. According to the application, the method can be divided into: power transformers and special transformers (furnace transformers, rectification transformers, power frequency test transformers, voltage regulators, mining transformers, audio transformers, intermediate frequency transformers, high frequency transformers, impact transformers, instrument transformers, electronic transformers, reactors, mutual inductors, etc.). Most transformers have a fixed core with primary and secondary windings wound around it. Due to the high permeability of the iron material, most of the magnetic flux is confined in the core, and thus, the two sets of coils can obtain a relatively high degree of magnetic coupling. In some transformers, the coil and core are tightly coupled together, and the ratio of the primary to secondary voltages is almost the same as the coil turns ratio of the two. Therefore, the turn ratio of the transformer can be generally used as a reference index for the step-up or step-down of the transformer. Because of the voltage boosting and reducing functions, the transformer becomes an important accessory of a modern power system, the transmission voltage is increased, so that the long-distance power transmission is more economical, and the voltage reducing transformer makes the power application more diversified. The transformer mainly has the following functions: voltage transformation; current transformation, impedance transformation; isolating; voltage regulation (magnetic saturation transformers); an autotransformer; high-voltage transformers (dry and oil-immersed) and the like, wherein the shapes of iron cores commonly used by the transformers generally comprise E-type and C-type iron cores, XED type and ED type CD type.

The most basic type of transformer comprises two windings wound with conductive wires and inductively coupled to each other. When an alternating current (having a known frequency) flows through one of the coils, an alternating voltage having the same frequency is induced in the other coil, and the magnitude of the induced voltage depends on the degree of coupling and magnetic cross-linking of the two coils.

The transformer is also called a test transformer, which can be divided into an inflatable type, an oil immersed type, a dry type and other test transformers, is basic test equipment for AC voltage withstand test of users of power plants, power supply bureaus, scientific research institutions and the like, passes the standard of the national quality supervision bureaus, and is used for performing insulation strength test on various electrical products, electrical components, insulating materials and the like under specified voltage.

The existing transformer vibration reduction system is relatively simple and mechanical, the filtering frequency range is small, and a user cannot effectively master the vibration condition, so that the running condition of the transformer can be known and the vibration reason can be analyzed. Therefore, improvements are needed.

Disclosure of Invention

The present invention is directed to a controlled electromagnetic damping system and a damping method to solve the above-mentioned problems of the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: a controlled electromagnetic vibration reduction system comprises a transformer fixing base, an upper coil, a vibration reduction cavity, a lower coil and a vibration sensor, wherein an upper coil top plate and an upper coil bottom plate are respectively arranged at the upper end part and the lower end part of the upper coil, the upper end surface of the upper coil top plate is provided with the transformer fixing base, the upper coil top plate and the transformer fixing base are provided with upper rubber pads, the vibration reduction cavity is arranged below the upper coil bottom plate, the lower coil top plate is arranged below the vibration reduction cavity, the lower rubber pads are arranged between the vibration reduction cavity and the lower coil top plate, and the lower coil is arranged between the lower coil top plate and the lower coil bottom plate; a damping spring and a filling material are arranged in the damping cavity; then the attractive force or repulsive force and the magnitude thereof between the coils are changed by controlling the current direction and the magnitude of the upper and lower coils, so that the compression condition of the filling material in the vibration reduction cavity is changed, and the unit space density of the filling material is increased or reduced;

the bottom of the lower coil bottom plate is provided with a vibration sensor;

and the transformer fixing base is provided with a transformer fixing hole.

Preferably, the damping method of the controlled electromagnetic damping system comprises the following steps:

A. the electromagnetic coil is in a current-free state, and the damping spring and the filling material in the damping cavity are in a semi-compression state due to the gravity of the transformer;

B. when the transformer works, vibration of the transformer is mostly eliminated or more obvious vibration is transmitted to the bottom of the vibration damping system after passing through the vibration damping cavity, the vibration sensor array converts the actual vibration condition of the bottom of the vibration damping system into an electric signal and transmits the electric signal to the data processor, and the data processor analyzes the frequency condition of unfiltered vibration;

C. and then the attractive force or repulsive force between the coils and the magnitude thereof are changed by controlling the current direction and the magnitude of the upper and lower coils, so that the compression condition of the filling material in the vibration reduction cavity is changed, and the unit space density of the filling material is increased or reduced.

Compared with the prior art, the invention has the beneficial effects that: the damping system is novel in structural design, a user can conveniently and effectively master the vibration condition, and the running condition of the transformer can be quickly known and the vibration reason can be analyzed.

Drawings

FIG. 1 is a schematic view of an electromagnetic damping system of the present invention;

FIG. 2 is a front side view of the electromagnetic damping system of the present invention;

FIG. 3 is a bottom surface view of the electromagnetic damping system of the present invention;

fig. 4 is a schematic view of the inside of the damping chamber according to the present invention.

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. 1-4, the present invention provides a technical solution: a controlled electromagnetic vibration reduction system comprises a transformer fixing base 1, an upper coil 4, a vibration reduction cavity 6, a lower coil 9 and a vibration sensor 11, wherein an upper coil top plate 3 and an upper coil bottom plate 5 are respectively arranged at the upper end part and the lower end part of the upper coil 4, the transformer fixing base 1 is arranged on the upper end surface of the upper coil top plate 3, an upper rubber pad 2 is arranged on the upper coil top plate 3 and the transformer fixing base 1, the vibration reduction cavity 6 is arranged below the upper coil bottom plate 5, a lower coil top plate 8 is arranged below the vibration reduction cavity 6, a lower rubber pad 7 is arranged between the vibration reduction cavity 6 and the lower coil top plate 8, and the lower coil 9 is arranged between the lower coil top plate 8 and the lower coil bottom plate 10; a damping spring (13) and a filling material are arranged in the damping cavity 6; then changing the attractive force or repulsive force between the coils and the magnitude thereof by controlling the current direction and the magnitude of the upper and lower coils, so that the compression condition of the filling material in the vibration reduction cavity is changed, and the unit space density of the filling material is increased or reduced by 1;

the bottom of the lower coil bottom plate 10 is provided with a vibration sensor 11;

and a transformer fixing hole 12 is formed in the transformer fixing base 1.

The working principle is as follows: the vibration reduction method comprises the following steps:

B. when the transformer works, vibration of the transformer is eliminated by most parts or is transmitted to the bottom of the vibration reduction system obviously after passing through the vibration reduction cavity, the vibration sensor array converts the actual vibration condition of the bottom of the vibration reduction system into an electric signal and transmits the electric signal to the data processor, and the data processor analyzes the frequency condition of unfiltered vibration;

C. and then the attractive force or repulsive force between the coils and the magnitude of the attractive force or repulsive force are changed by controlling the current direction and the magnitude of the upper coil and the lower coil, so that the compression condition of the filling material in the vibration reduction cavity is changed, and the unit space density of the filling material is increased or reduced.

The filling materials with different densities can filter different vibration frequencies, and finally the aim of filtering the vibration with different frequencies is achieved by changing the unit space density of the filling materials; meanwhile, if the coil is electrified to generate magnetic force, the medium and low frequency vibration can be selectively filtered; when the vibration sensor is used, the vibration information of the transformer can be recorded, and the early warning effect can be achieved under special conditions.

In conclusion, the damping system is novel in structural design, a user can conveniently and effectively master the vibration condition, and the operation condition of the transformer can be quickly known and the vibration reason can be analyzed.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A controlled electromagnetic damping system, characterized by: the vibration reduction device comprises a transformer fixing base (1), an upper coil (4), a vibration reduction cavity (6), a lower coil (9) and a vibration sensor (11), wherein an upper coil top plate (3) and an upper coil bottom plate (5) are respectively arranged at the upper end part and the lower end part of the upper coil (4), the transformer fixing base (1) is arranged on the upper end surface of the upper coil top plate (3), an upper rubber pad (2) is arranged on the upper coil top plate (3) and the transformer fixing base (1), the vibration reduction cavity (6) is arranged below the upper coil bottom plate (5), a lower coil top plate (8) is arranged below the vibration reduction cavity (6), a lower rubber pad (7) is arranged between the vibration reduction cavity (6) and the lower coil top plate (8), and the lower coil (9) is arranged between the lower coil top plate (8) and the lower coil bottom plate (10); a damping spring (13) and a filling material are arranged in the damping cavity (6); then the attractive force or repulsive force and the magnitude thereof between the coils are changed by controlling the current direction and the magnitude of the upper and lower coils, so that the compression condition of the filling material in the vibration damping cavity is changed, and the unit space density of the filling material is increased or reduced;

a vibration sensor (11) is arranged at the bottom of the lower coil bottom plate (10);

and the transformer fixing base (1) is provided with a transformer fixing hole (12).

2. Damping method for implementing a controlled electromagnetic damping system according to claim 1, characterized in that: the vibration reduction method comprises the following steps:

A. the electromagnetic coil is in a current-free state, a damping spring and a filling material are arranged in the damping cavity, and the damping spring and the filling material are in a semi-compression state due to the gravity of the transformer;

C. and then the attractive force or repulsive force between the coils and the magnitude thereof are changed by controlling the current direction and the magnitude of the upper and lower coils, so that the compression condition of the filling material in the vibration cavity is changed, and the unit space density of the filling material is increased or reduced.