KR101849748B1 - System for preventing vibration of rotation equipment of power plant - Google Patents

Abstract

One embodiment of the present invention relates to a system for preventing vibration of rotating equipment of a power plant. An object of the present invention is to eliminate vibration by fixing weight unbalance in real time through remote control without stopping a rotating body when the vibration is generated due to the weight unbalance occurring during the rotation of the rotating body such as a turbine of a power plant. Accordingly, according to one embodiment of the present invention, disclosed is the system for preventing vibration of rotating equipment of a power plant. The system for preventing vibration of rotating equipment of a power plant comprises: a weight bolt attached to the rotating body and having a moving space formed therein, wherein at least one limit switch and a position sensor are installed in the moving space; a weight including a through hole, into which a rotary shaft provided in the longitudinal direction of the moving space is inserted, and moving in a vertical direction by the rotation of the rotary shaft; a motor for rotating the rotary shaft; a control unit for operating the limit switch based on position information of the weight detected by a position detection unit and controlling the motor; a remote control unit for monitoring an operation state of the motor and transmitting an operation signal to the motor; and a transmission/reception unit for transmitting and receiving signals from the control unit and the remote control unit.

Description

TECHNICAL FIELD [0001] The present invention relates to a vibration control system for a power plant,

One embodiment of the present invention relates to a power plant rotating equipment vibration prevention system.

Current generators must stop the generator if the oscillation of the rotor exceeds the specified value, resume weight unbalance, and restart again. However, if the vibration is still not resolved, it is necessary to repeat the troublesome and uneconomical process of stopping again and resuming the operation to solve the unbalance of weight.

This process causes economic damage due to fuel loss and time loss to restart after stoppage, and it is also a problem that the planned power system operation is hindered.

Registered Patent Publication No. 10-0944223 'Vibration and speed sensor test apparatus and test method thereof' Registered Patent Publication No. 10-1498527 " Vibration frequency analysis program,

In an embodiment of the present invention, when a rotating body such as a turbine of a generator rotates due to unbalance in weight, it is possible to eliminate vibrations by eliminating weight unbalance through remote control in real time without stopping the rotating body. Prevention system.

A weight bolt mounted on the rotating body and having a moving space therein, the weight bolt having at least one limit switch and a position detecting sensor installed in the moving space; A weight attached to the moving space and having a through hole fitted to a rotating shaft provided in the longitudinal direction, the weight being moved up and down by rotation of the rotating shaft; A driving motor for rotating the rotating shaft; A control unit for operating the limit switch based on the position information of the weight detected by the position sensor and controlling the operation of the driving motor; A remote controller for monitoring an operation state of the drive motor and transmitting an operation signal to the drive motor; And a transceiver for transmitting and receiving signals between the controller and the remote controller.

A plurality of threads are formed on the outer periphery of the weight bolt and the rotating shaft, and at least one moving shaft protruding outside the weight can be formed.

The weight bolt may have a receiving groove in which the moving shaft is accommodated in an inner portion facing the weight.

The weight bolt may be provided with a battery unit for supplying power to the driving motor and the transmitting / receiving unit.

The weight bolt, the driving motor, the rotating shaft, the control unit, the battery unit, and the transmitting and receiving unit are located inside the weight bolt, and a cap can be fitted in the lower part of the weight bolt.

In the power plant rotating equipment vibration preventing system according to an embodiment of the present invention, a weight bolt that can move a weight from outside the center of the rotating body is installed, and when the vibration due to weight unbalance occurs, It is possible to easily control the vibration of the generator rotor.

In order to solve the vibration problem due to the unbalance of the weight of the generator rotor, an embodiment of the present invention provides a space inside the weight bolt attached to the rotating body, a weight which can move up and down in the space, And the vibration due to the unbalance of weight can be solved in real time by using the weight increasing principle by the centrifugal force.

1 is a view illustrating a system for preventing vibration of a power plant rotating equipment according to an embodiment of the present invention.
Fig. 2 is a top view and a cross-sectional view of the weight bolt in the plant rotation facility vibration preventing system of Fig. 1. Fig.
Figs. 3A and 3B are views showing a rising operation and a falling operation of the weight bolt in the plant rotation facility vibration preventing system of Fig. 1. Fig.

The terms used in this specification will be briefly described, and the present invention will be described in detail.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term, not on the name of a simple term, but on the entire contents of the present invention.

When an element is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements as well, without departing from the spirit or scope of the present invention. Furthermore, the term "part" or the like described in the specification means a unit for processing at least one function or operation, which may be implemented by hardware or software, or a combination of hardware and software.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Generally, the generator has a problem of inconvenience and inefficiency to repeatedly start and regularly operate due to a minor vibration problem while periodically fixing and re-operating the generator.

In addition, large power generators in power plants suffer from economic losses due to fuel consumption and time delay when restarting after stopping for vibration elimination. In terms of power system operation, There is an unreasonable problem that it is difficult to develop electricity in a short period of time. In other words, stopping the generator due to minor vibration problems can be a national damage as well as a damage to the generation company.

Accordingly, in the present invention, when the vibration due to unbalance of weight is generated in the rotating body, the weight is moved to eliminate the unbalance in real time and remotely without stopping the rotating body. Further, since the present invention is installed in a rotating body and power supply is difficult from the outside, a power supply unit is provided in itself and a remote communication technology for real time remote control is applied. Further, since the present invention is mounted on a rotating body that rotates at a high speed, it has a mechanically stable structure, and has an algorithm for detecting vibration upon occurrence of vibration and suppressing vibration by itself.

1 is a view showing an upper surface and a cross section of a weight bolt in a plant rotation facility vibration damping prevention system of FIG. 1, and FIGS. 3A and 3B 1 is a view showing a rising operation and a falling operation of the weight bolt in the plant rotation facility vibration preventing system of Fig. 1; Fig.

Referring to FIG. 1, a system for preventing vibration of a rotating machine of a power plant according to an embodiment of the present invention includes a rotating body, such as a turbine of a large capacity generator, A weight unit 110, a driving motor 130, a control unit 150, a remote control unit 20, and a transmission / reception unit (not shown). The system includes a weight bolt 10, 30).

The power plant anti-vibration system of this plant is designed to be remotely controllable, so that vibration can be eliminated without stopping the rotating body in real time or online.

The weight bolt 10 is attached to the rotating body and has a moving space therein. At least one limit switch (not shown) and a position detecting sensor (not shown) are installed in the moving space. 1 and 2, the weight bolt 10 includes a battery unit 140, a driving motor 130, a transmitting / receiving unit 30, a rotating shaft 120, A weight 110, and the like. The weight bolt 10 is hollow and has a weight 110, a driving motor 130, a rotation shaft 120, a control unit 150, a battery unit 140, and a transceiver unit 30, And the stopper 13 can be fitted in the lower part of the weight bolt 10. At this time, the battery unit 140 supplies driving power to the driving motor 130 and the transceiver unit 30.

The position sensor may be a conventional sensor or a variable resistor that can detect the position of the weight 110. The limit switch is provided to automatically stop the movement of the weight 110 under the control of the controller 150 when the weight 110 is moved to the upper and lower limits. The position sensor and the limit switch may be seated in the receiving groove 14 formed in the weight bolt 10 and connected by a cable.

The present power plant rotating equipment vibration preventing system uses the battery unit 140 as a driving power source for the driving motor 130 or the transmitting and receiving unit 30 and limits the weight for automatically stopping the control when the weight 110 is moved to both ends And the position information of the weight 110 is transmitted to the remote controller 20 through the transmitting and receiving unit 30. When the weight 110 moves, So that the remote controller 20 can know the position of the weight 110. [

A plurality of threads 12 are formed on the outer periphery of the weight bolt 10 and the rotary shaft 13.

In addition, the weight bolt 10 may be formed with a receiving groove 14 in which the moving shaft 112 is received at an inner side portion facing the weight 110. [

2, the weight bolt 10 has a guide groove (that is, a receiving groove) (not shown) so that the weight shaft 110 does not rotate when the rotation shaft 13, which is threaded by the driving motor 130, 14) so that the weight 110 can move up and down. In the receiving groove 14, the signal cable can be seated so as to transmit the information of the limit switch to the transmitting and receiving unit 30. [

The weight bolt 10 is attached to the rotating body, and a weight 110 is installed in the space so as to solve the vibration problem caused by the unbalance of the weight of the generator rotor, The weight weight 110 can be moved through the control and the vibration due to the unbalance of weight can be solved by using the principle of weight increase by the centrifugal force.

The weight 110 has a through hole 111, which is a nano-like hole that is fitted in a rotation shaft provided in the longitudinal direction in the movement space, and is moved up and down by the rotation of the rotation shaft 120. The rotation shaft 120 for moving the weight 110 rotates in a forward and reverse direction by a driving motor 130 driven by a remote control and the weight 110 can be moved up and down according to the rotation.

At least one moving shaft 112 protruding from the weight 110 may be formed on the outer side of the weight 110.

That is, the weight 110 has a center hole, and the thread has the same thread as that in the rotation shaft 120. The weight 110 is inserted into a threaded rotary shaft 120 that rotates according to the rotation of the driving motor 130 and is movable upward and downward according to the direction of the thread when the rotary shaft 120 rotates .

The driving motor 130 is connected to a lower portion of the rotating shaft 120 to rotate the rotating shaft 120 to move the weight 110.

The driving motor 130 receives the driving signal from the remote controller 20 by wire or wire, and is driven by the control of the controller 150 based on the driving signal.

The control unit 150 monitors and controls each component provided in the weight bolt 10 and operates the limit switch based on the position information of the weight 110 sensed by the position sensor, The operation of the driving motor 130 can be controlled.

That is, when the weight 110 being driven moves to the extreme position in the up or down direction, the controller 150 operates the limit switch to automatically stop when the weight is moved to the extreme position, It is possible to control the remote controller 20 to transmit the position information to the remote controller 20 so that the position of the weight 110 can be known.

The remote control unit 20 is located remotely from the present weight bolt 10 to monitor the operation state of the drive motor 130 and transmits an operation signal to the drive motor 130.

The transceiver 30 is a communication interface for transmitting and receiving signals between the controller 150 and the remote controller 20, and is applicable to both wired and wireless communication systems. The transceiver 30 may receive the command of the remote controller 20 and transmit the state of the weight 110. [

When the weight bolt 10 is mounted on the rotating body in a diagonal direction and vibration is generated due to the unbalance of weight when the rotating body rotates in the state where the weight bolt 10 is installed in the rotating body, The vibration can be solved in real time using the weight increase / decrease effect by the centrifugal force through the position movement by the remote control of the weight weight 110 installed in the body. For this purpose, the present power plant rotating equipment vibration damping prevention system includes a plurality of weight bolts 10 mounted on a rotating body, a weight unit 110 for controlling the control unit 150, The automatic vibration suppression algorithm can be implemented.

Therefore, the vibration control system of the power plant revolving facility can solve the vibration by real-time remote control without stopping the rotating body when the vibration caused by the weight imbalance occurs in the rotor or the large rotating body of the large generator, And restarts can improve the economic loss due to fuel consumption and the economic loss reduction due to the time lag.

In addition, the vibration control system of the power plant revolving facility is a balance unbalance type. After the stoppage of vibration, experts with experience and know-how will perform balance adjustment through complex calculation and prediction process. After restarting, In order to solve the existing problem of complicated work, vibration can be solved through a procedure that is not difficult by stopping the rotating body at the time of vibration, performing adjustment in real time even if not an expert, and observing the change of vibration.

The stopper 13 provided under the weight bolt 10 may be made of a rubber material and the raw material content ratio of the stopper 13 is 60 parts by weight of the rubber, 33 to 36 parts by weight of Carabone black, To 5 parts by weight, and 1 to 3 parts by weight of sulfur as an accelerator are mixed.

When the content is less than 33 parts by weight, the elasticity and abrasion resistance are reduced. When the content is more than 36 parts by weight, the content of rubber as a main component is relatively small and the elasticity may be lowered. Therefore, 33 to 36 parts by weight.

The antioxidant may be selected from 3C (N-PHENYL-N'-ISOPROPYL-P-PHENYLENEDIAMINE) or RD (POLYMERIZED 2,2,4-TRIMETHYL-1,2-DIHYDROQUINOLINE) If the content is less than 5 parts by weight, the product tends to be oxidized. If the amount is more than 5 parts by weight, the content of the rubber as the main component may be relatively small and the elasticity may be lowered. Weight is adequate.

1 to 3 parts by weight of sulfur as a promoter is mixed. If less than 1 part by weight, the effect of vulcanization is insignificant in the heating process during molding, so at least 1 part by weight is added. If the amount is more than 3 parts by weight, the content of the rubber as the main component may be relatively small and the elasticity may be lowered. Therefore, 1 to 3 parts by weight is appropriate.

Therefore, since the present invention is reinforced with a synthetic rubber having elasticity in various directions, the elasticity, toughness and rigidity of the plug 13 are increased, so that the durability is improved and thus the life of the plug 13 is increased.

It is to be understood that the present invention is not limited to the above-described embodiment, and that various modifications and variations of the present invention are possible in light of the above teachings, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: weight bolt 11: moving space
12: thread 13: plug
14: receiving groove 20: remote control
30: Transmitting / receiving unit 110: weight
111: through hole 112: moving axis
120: rotating shaft 130: driving motor
140: battery unit 150:

Claims (5)

A weight bolt mounted on the rotating body and having a moving space therein, in which at least one limit switch and a position detecting sensor are provided in the moving space;
A weight attached to the moving space and having a through hole fitted to a rotating shaft provided in the longitudinal direction, the weight being moved up and down by rotation of the rotating shaft;
A driving motor for rotating the rotating shaft;
A control unit for operating the limit switch based on the position information of the weight detected by the position sensor and controlling the operation of the driving motor;
A remote controller for monitoring an operation state of the drive motor and transmitting an operation signal to the drive motor; And
And a transmission / reception unit for transmitting / receiving signals between the control unit and the remote control unit,
The limit switch automatically stops the movement of the weight by the control of the control unit when the limit switch is moved to the upper and lower limits of weight,
The position sensor and the limit switch are seated in a receiving groove formed in the weight bolt and connected by a cable,
In the power plant anti-vibration system, when a plurality of weight bolts are attached to a rotating body in a diagonal direction and vibration occurs due to unbalance when the rotating body rotates, the weight placed in the weight bolt is moved to a remote control ,
And a battery unit for supplying power to the drive motor and the transmission / reception unit is provided in the weight bolt,
The weight bolt, the driving motor, the rotating shaft, the control unit, the battery unit, and the transmitting and receiving unit are located inside the weight bolt, and a cap is inserted into the lower part of the weight bolt,
The stopper is made of a rubber material, and the raw material content ratio of the stopper includes 60 parts by weight of rubber, 33 to 36 parts by weight of carobone black, 2 to 5 parts by weight of an antioxidant and 1 to 3 parts by weight of sulfur as an accelerator Rotating system vibration prevention system of power plant.
The method according to claim 1,
Wherein a plurality of threads are formed on the outer periphery of the weight bolt and the rotating shaft and at least one moving shaft protruded outside the weight is formed.
The method of claim 2,
Wherein the weight bolt is formed with an accommodating groove for accommodating the moving shaft at an inner side portion facing the weight.
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