TWI797811B - Dynamic balancing system - Google Patents

Abstract

The present invention provides a dynamic balancing system comprising a power source device, a shaft, a loading, a balancing module and a monitor control module, and the balancing module comprises a rotating plate, multiple magnetic counterweights and multiple electromagnets. The power source device connects to the shaft and turns the shaft to rotate in an axial direction in order to turn the loading connected to the shaft to rotate. The rotating plate connects to the shaft, and multiple grooves are formed on the lateral plane of the rotating plate. The magnetic counterweights are disposed on the grooves, and limited to move alone the grooves. The electromagnets are disposed on the lateral plane of the rotating plate opposite to the grooves. The monitor control module is suitable for obtaining a monitor signal of the dynamic balancing system, and the electromagnets are turned on/off according to the monitor signal to fix the positions of the magnetic counterweights, in order to achieve the effect of dynamically balancing any rotating system.

Description

Dynamic Balance Correction System

The present invention relates to a balance correction system, and in particular to a dynamic balance correction system.

Rotating machinery is one of the core areas of mechanical system development, including machine tools, automobiles, engines, compressors, turbines, aircraft power systems, and ship power systems. After running for a long time, affected by external and internal vibrations, it will lead to many problems such as unbalanced shaft center deviation, which will cause cracks and loose bearing housings and other component damage.

Conventional machinery and equipment need to be shut down regularly for balance correction measurements, and adjustments are made with manual trial weight configuration to complete the balance correction. Specifically, firstly, the equipment and equipment are measured through measuring devices such as vibration sensors and tachometers, and the direction and distance of the offset axis of the equivalent mass are calculated, and then the position in the opposite direction of the offset is manually Apply a certain weight to balance. According to experience, after repeated balancing and counterweighting for several times, the equivalent mass can be returned to the axis to complete the correction.

Taiwan Patent No. I723317 relates to a balance correction system and correction method of a mechanical device. This document proposes to configure a correction turntable in a rotating mechanical system, and to set a stepping motor and a counterweight on the correction turntable. When the monitor finds that the rotation axis is deviated, the stepping motor will immediately move the counterweight to adjust the position of the counterweight on the calibration turntable, so as to balance the eccentric mass.

However, in practical applications, the mechanical structure design of the stepper motor combined with the counterweight is too complicated, and the mutual interference on the calibration turntable leads to poor space utilization, so there is still room for improvement in the conventional balance calibration system.

In view of this, the present invention provides a dynamic balance correction system, including a power source device, a rotating shaft, a load, a balance correction module, and a monitoring and control module, and the balance correction module includes a turntable, a plurality of magnetic counterweights and a plurality of electromagnetic iron. The power source device is connected to the rotating shaft and drives the rotating shaft to rotate axially, thereby driving the load connected to the rotating shaft to rotate. The turntable is connected to the rotating shaft, and a plurality of grooves are formed on the side of the turntable. The magnetic counterweights are arranged on the grooves and limited to move in the direction of the grooves. These electromagnets are arranged on the side of the turntable opposite to these grooves. The monitoring control module is suitable for obtaining the monitoring signal of the dynamic balance correction system, and the electromagnets are suitable for being energized according to the monitoring signal to fix the positions of the magnetic counterweights.

In one embodiment, a plurality of positioning seats can be formed in the grooves, and the shapes of the positioning seats correspond to the magnetic counterweights, and the positions of the electromagnets are relative to the positioning seats. These magnetic counterweights are steel balls, for example.

In another embodiment, the shapes of these grooves are, for example, elongated grooves or annular grooves. The elongated grooves are radially distributed on the turntable at an equal angle, for example, and the annular grooves are distributed on the turntable in multiple turns, for example.

In yet another embodiment, the monitoring control module includes a vibration sensor, a tachometer and a control unit. The monitoring signal includes the vibration signal measured by the vibration sensor and the rotational speed phase signal measured by the tachometer. The control unit is adapted to analyze the monitoring signals to control the electromagnets. The dynamic balance correction system can further include a bearing, and the bearing is sheathed on the rotating shaft, and the vibration sensor is arranged on the bearing.

In another embodiment, the dynamic balance correction system may further include a slip ring and a power supply unit. The slip ring is sleeved on the rotating shaft, and the power supply unit is disposed on the slip ring and electrically connected to these electromagnets.

In yet another embodiment, the number of balance correction modules may be 2 or more. In addition, a plurality of fixing screw holes may be formed on the turntable, and these fixing screw holes are, for example, annularly arranged on the outer edge of the turntable.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments will be described in detail below together with the attached drawings.

FIG. 1 is a perspective view of a dynamic balance correction system according to an embodiment of the present invention. Please refer to FIG. 1, the dynamic balance correction system 100 of the present invention includes a rotating shaft 110, a power source device 120, a load 130, a balance correction module 140 and a monitoring control module 150, wherein the power source device 120 and the load 130 are connected to the rotating shaft 110, The power source device 120 drives the rotating shaft 110 to rotate axially, and jointly drives the load 130 to rotate. The monitoring control module 150 is adapted to obtain the monitoring signal of the dynamic balance correction system 100 for real-time calculation of the equivalent mass offset of the dynamic balance correction system 100 .

The balance correction module 140 includes a turntable 142, a plurality of magnetic counterweights (not shown) and a plurality of electromagnets 144, wherein the turntable 142 is connected to the rotating shaft 110, and these magnetic counterweights and electromagnets 144 are located on the turntable 142. on different sides. When the electromagnet 144 is energized to generate magnetic force, the magnetic counterweight can be attracted to a fixed position on the turntable 142 , thereby adjusting the counterweight distribution of the balance correction module 140 , so that the dynamic balance correction system 100 achieves overall rotational balance.

FIG. 2 is a cross-sectional view of the balance correction module 140 in FIG. 1 . Please refer to FIGS. 1 and 2 at the same time, a plurality of grooves 146 are formed on the same side of the turntable 142 as the magnetic counterweight, that is, the grooves 146 and the electromagnet 144 are also located on different sides of the turntable 142 . Magnetic counterweights, such as steel balls, are disposed on the grooves 146 and restricted to move in the direction of the grooves 146 .

In this embodiment, a plurality of positioning seats 148 can be formed in the grooves 146 , and the positioning seats 148 are, for example, in the shape of a round bowl corresponding to the shape of a steel ball. Specifically, the number and positions of these electromagnets 144 correspond to the number and positions of these positioning seats 148, and the number of these grooves 146 corresponds to the number of magnetic counterweights, and a single groove 146 has several positioning seats 148 . In this way, when the electromagnets 144 are energized or de-energized according to the monitoring signal, the magnetic counterweights can be fixed at different positions of the positioning seats 148 . In other words, any magnetic counterweight can move in the groove 146 and be fixed on a specific positioning seat 148 due to the magnetic force of the electromagnet 144, so as to adjust the counterweight of the balance correction module 140 distribute.

Specifically, the monitoring control module 150 includes, for example, a vibration sensor 152 , a tachometer 154 (shown as a block), and a control unit 156 (shown as a block). Through the signals obtained from the vibration sensor 152 and the tachometer 154, the control unit 156 can immediately calculate the eccentricity of the entire rotating system, including the size and azimuth, and calculate and control the individual electromagnetic pulses in different grooves 146 based on the results. Iron 144 power on and off. In this way, the magnetic counterweight moves in the groove 146 on the turntable 142 due to the rotation of the rotating system, and is finally attracted by the energized electromagnet 144, thereby achieving the purpose of fixing the magnetic counterweight at a specific position in the groove 146 , to complete the purpose of dynamic correction.

For the sake of clarity, this embodiment shows two perspective views of the balance correction modules 140 to represent different configurations on both sides, but the present invention does not limit the number of balance correction modules 140 . For example, FIG. 3 is a perspective view of a dynamic balance correction system according to another embodiment of the present invention. For simplicity of description, the same components still use the same symbols and will not be described again. Please refer to FIG. 3 , the dynamic balance correction system 100a of this embodiment only includes a single balance correction module 140a, but the dynamic balance correction system of the present invention may also include two or more than three sets of balance correction modules.

Please refer to FIG. 1 again. Since the dynamic balance correction system 100 can adjust the counterweight immediately for balance correction without shutting down, it is particularly advantageous in ship power systems that are difficult to stop for maintenance or rotating systems in dangerous areas. In a marine power system, the power source device 120 is, for example, an engine, and the load 130 is, for example, a ship propeller (propeller) for driving water forward, and the disc-shaped load 130 in the figure is only for illustration, not for limitation. this invention. In applications to other rotating systems, such as electric vehicles, the power source device 120 is, for example, a motor, and the load 130 is, for example, tires of a car and related transmission equipment to travel against road resistance. In another embodiment, it can also be used in a production system for machine tool cutting tool processing.

Compared with the conventional method of using a stepping motor to adjust the counterweight, the stepping motor and the counterweight are on the same side of the turntable, while the magnetic counterweight and the electromagnet of the present invention are respectively located on the opposite sides of the turntable. On both sides, more space can be allocated and utilized. In other words, compared to the conventional technique of setting 4 sets of stepping motors with counterweights to occupy the entire space of the turntable, the present invention can set more sets of electromagnets for different combinations of counterweights to adjust the overall system more precisely The equivalent mass position of .

In addition, in the prior art, the counterweight and the stepper motor are arranged on the same side, which is easy to interfere with each other, resulting in limited design. The present invention can arbitrarily set the direction distribution of the groove form and the corresponding electromagnet distribution position, and the design is relatively very flexible. .

Furthermore, the structure of the stepping motor is complex, while the overall structure of the electromagnet is relatively simple, which can effectively reduce the system cost.

Please refer to Figures 1 and 2 again. In this embodiment, the six grooves 146 are elongated and radially distributed on the turntable 142 at equal angles of 60 degrees, wherein each groove 146 has three Positioning seat 148 from inside to outside. It should be noted that the present invention does not limit the shape, quantity and position of the grooves 146 , nor does it limit the quantity and position of the corresponding positioning seats 148 . Another embodiment will be described below with accompanying drawings.

4A and 4B are schematic side views of a balance correction module according to another embodiment of the present invention. For simplicity, only the side with grooves is shown. Please refer to FIGS. 4A and 4B , different types and quantities of grooves are formed on the side surfaces of the turntables 142b and 142c of the balance correction modules 140b and 140c. In the balance correction module 140b, the shape of the groove 146b is, for example, annular, and is distributed on the turntable 142b in a manner of multiple turns.

In this embodiment, a single groove 146b may have 12 positioning seats 148b, and these positioning seats 148b are arranged clockwise at intervals of 30 degrees, for example. In addition, there are three magnetic counterweights (not shown) corresponding to the single groove 146b. Under normal circumstances, these three magnetic counterweights can be respectively fixed at the position of the positioning seat 148b at intervals of 120 degrees without affecting The system causes a mass shift. When balance correction is required, the three magnetic counterweights can be moved along the groove 146b to an appropriate positioning seat 148b and then fixed.

Following the above, when the magnetic counterweight moves in the peripheral groove 146b, due to the longer radius from the axis, it can be used for coarse adjustment when relatively compensating for a large mass offset during balance correction. When the magnetic counterweight moves in the groove 146b on the inner periphery, due to the short radius from the axis, it can be used for fine adjustment by relatively compensating for a small mass deviation during balance calibration. Incidentally, the present invention does not limit the number of positioning seats 148b and magnetic counterweights corresponding to a single groove 146b.

In the balance correction module 140c, the aforementioned elongated grooves and annular grooves can be mixed and matched. Specifically, a single annular groove 146c1 is disposed on the periphery of the turntable 142c, while eight elongated grooves 146c2 are radially distributed on the inner periphery of the turntable 142c at equal angles of 45 degrees, and the grooves 146c1, 146c2 can be There are different numbers of positioning seats 148c.

Please refer to FIG. 1 again. In this embodiment, the vibration sensor 152 is used to measure the vibration signal, and the tachometer 154 is used to measure the rotational speed phase signal. The vibration sensor 152 and the tachometer 154 are electrically connected to the control unit 156 to transmit the vibration signal and the rotational speed phase signal to the control unit 156 respectively. Through the monitoring signal composed of the vibration signal and the rotational speed and phase signal, the control unit 156 can analyze and calculate the equivalent mass offset of the dynamic balance correction system 100 in real time, and adjust the switch of the corresponding electromagnet 144 to perform compensation and balance correction. Incidentally, the vibration sensor 152 is, for example, an acceleration sensor, and the vibration signal is, for example, an acceleration signal.

In addition, the dynamic balance correction system 100 may further include a bearing 162, a slip ring 164 and a power supply unit 166 (shown as a block), wherein the vibration sensor 152 is disposed on the bearing 162, and the slip ring 164 is sleeved on the rotating shaft 110 . The power supply unit 166 is disposed on the slip ring 164 and electrically connected to the electromagnets 144 to continuously supply power to the electromagnets 144 during rotation. In this embodiment, the control unit 156 can be electrically connected to the power supply unit 166 , and then control the power supply unit 166 to supply power to a specific electromagnet 144 to adjust the position distribution of the magnetic counterweights, thereby dynamically balancing the rotating system.

It is worth mentioning that when the equivalent mass offset exceeds the amount that can be compensated by the balance correction module 140 , it still needs to be shut down for manual correction and compensation. In this embodiment, a plurality of fixing screw holes 149 can be formed on the turntable 142 to lock the counterweight screws (not shown) of a specific weight to balance the counterweight, and the magnetic counterweight is positioned on the innermost periphery. on the positioning seat 148. In this way, the balance of the overall system can be ensured before each start-up operation, and the balance correction module 140 can have the maximum compensation and adjustment capacity. The fixing screw hole 149 can pass through the turntable 142 (as shown in FIGS. 1 and 3 ), or be arranged annularly on the outer edge of the turntable 142 (not shown), and the present invention does not limit the position or state of the fixing screw hole 149 Sample.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Anyone skilled in this art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall be determined by the scope of the attached patent application.

100, 100a: dynamic balance correction system 110: rotating shaft 120: power source device 130: load 140, 140a, 140b, 140c: balance correction module 142, 142b, 142c: turntable 144: electromagnet 146, 146b, 146c1, 146c2: groove 148, 148b, 148c: positioning seat 149: Fixing screw hole 150:Monitoring control module 152: Vibration sensor 154:Tachometer 156: Control unit 162: Bearing 164: slip ring 166: Power supply unit

FIG. 1 is a perspective view of a dynamic balance correction system according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the balance correction module 140 in FIG. 1 . FIG. 3 is a perspective view of a dynamic balance correction system according to another embodiment of the present invention. 4A and 4B are schematic side views of a balance correction module according to another embodiment of the present invention.

100: Dynamic balance correction system

110: rotating shaft

120: power source device

130: load

140:Balance correction module

142: turntable

144: electromagnet

146: Groove

148: positioning seat

149: Fixing screw hole

150:Monitoring control module

152: Vibration sensor

154:Tachometer

156: Control unit

162: Bearing

164: slip ring

166: Power supply unit

Claims (9)

A dynamic balance correction system, comprising: a rotating shaft; a power source device, connected to the rotating shaft and driving the rotating shaft to rotate axially; a load, connected to the rotating shaft; a balance correction module, including: a turntable, connected to the rotating shaft, A plurality of grooves are formed on the side of the turntable; a plurality of magnetic counterweights are arranged on the grooves, and are restricted to move in the direction of the grooves; and a plurality of electromagnets are arranged on the turntable relative to the and a monitoring control module adapted to obtain a monitoring signal of the dynamic balance correction system, wherein the electromagnets are adapted to be energized according to the monitoring signal to fix the position of the magnetic counterweights ; wherein the grooves are annular in shape and distributed on the turntable in a multi-turn manner. The dynamic balance correction system as described in Claim 1, wherein a plurality of positioning seats are formed in the grooves, and the shapes of the positioning seats correspond to the magnetic counterweights, and the positions of the electromagnets are relative to These positioning seats. The dynamic balance correction system as described in Claim 1, wherein the grooves are elongated and radially distributed on the turntable at equal angles. The dynamic balance correction system as described in Claim 1, wherein a plurality of fixing screw holes are formed on the turntable, and the fixing screw holes are arranged on the outer edge of the turntable in a ring shape. The dynamic balance correction system as described in Claim 1, wherein the magnetic counterweights are steel balls. The dynamic balance correction system as described in claim 1, wherein the monitoring control module includes: a vibration sensor, and the monitoring signal includes a vibration signal measured by the vibration sensor; a tachometer, and the The monitoring signal includes a rotational speed phase signal measured by the tachometer; and a control unit is suitable for analyzing the monitoring signal to control the electromagnets. The dynamic balance correction system as described in Claim 6 further includes a bearing, and the bearing is sleeved on the rotating shaft, and the vibration sensor is arranged on the bearing. The dynamic balance correction system as described in Claim 1 further includes: a slip ring sleeved on the rotating shaft; and a power supply unit configured on the slip ring and electrically connected to the electromagnets. The dynamic balance correction system as described in Claim 1, wherein the number of the balance correction modules is 2 or more.

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